JP5789730B1 - Manufacturing method and manufacturing apparatus for sheet-like member according to absorbent article - Google Patents

Abstract

Between the first continuous sheet that is continuous in the transport direction and the second continuous sheet that is continuous in the transport direction, an elastic member that is continuous in the transport direction in an extended state in the transport direction is inserted and corresponds to at least a high stretchable region. By cutting the composite sheet fixed in the region in one region in the conveying direction in the region corresponding to the low expansion / contraction region, and contracting the elastic member toward the region corresponding to the high expansion / contraction region, Forming a high stretch region and a low stretch region on the composite sheet side by side in the transport direction. In forming, when the composite sheet passes along the conveying direction between the cutter rotating body and the anvil rotating body that rotate to face each other, the cutter blade on the outer peripheral surface of the cutter rotating body. And the anvil rotator form a pressure-bonding portion between the first continuous sheet and the second continuous sheet at a position where the composite sheet is sandwiched by sandwiching the composite sheet with a gap between them. However, the elastic member is cut.

Description

  The present invention relates to a method for manufacturing a sheet-like member and an apparatus for manufacturing absorbent articles such as disposable diapers.

  Conventionally, in the manufacture of disposable diapers known as absorbent articles that absorb excretory fluids such as urine, a high stretch region and a low stretch region that is less stretchable in a predetermined direction than the high stretch region are arranged in a predetermined direction. The sheet-like member which has is used.

  Such a sheet-like member 20s' is generated as follows. FIG. 1 is a schematic view showing the generation process in a plan view of the sheet-like member 20s ′.

  First, as shown in FIG. 1, the composite sheet 20s1 'as the material of the sheet-like member 20s' is conveyed in the MD direction. Here, the composite sheet 20s1 ′ is made of rubber thread as an elastic member continuous in the MD direction between the first continuous sheet 21s ′ continuous in the MD direction and the second continuous sheet 22s ′ continuous in the MD direction. The continuous bodies 27s ′, 27s ′,... Are inserted in the MD direction in an expanded state. Further, the continuous bodies 27s ', 27s', ... of the rubber thread are fixed to the continuous sheets 21s ', 22s' intermittently in the MD direction. That is, the continuums 27s ′, 27s ′... Of the same thread rubber are fixed with a hot melt adhesive in the region AH1 ′ corresponding to the high stretch region AH ′, but the low stretch region AL ′. Is not fixed in the area AL1 ′ corresponding to.

  When the composite sheet 20s1 ′ passes through the cutter device 50 ′, a low expansion / contraction region in the composite sheet 20s1 ′ is formed by a cutter blade (not shown) and an anvil roll (not shown) of the cutter roll of the device 50 ′. The region AL1 ′ corresponding to AL ′ is clamped, and thereby the rubber thread continuums 27s ′, 27s ′,... Are cut at a single PC in the MD direction. Then, the cut rubber threads 27sd ′, 27sd ′... Shrink toward the regions AH1 ′, AH1 ′ corresponding to the high stretch regions AH ′, AH ′, respectively. The stretchable area AH ′ and the low stretchable area AL ′ are formed side by side in the MD direction. With the above, the sheet-like member 20s' is generated.

Special table 2014-511753

  Here, from the viewpoint of suppressing damage to the sheet-like member 20s ′, only the thread rubber continuums 27s ′, 27s ′,... It is desirable that the two continuous sheets 21s ′ and 22s ′ are not cut as much as possible. In such a case, the first continuous sheet 21s ′ and the second continuous sheet 21 are located at the sandwiched position PC1. A crimping portion j with the sheet 22s ′ is formed.

  However, Patent Document 1 does not disclose the formation of the crimping portion j at the same position PC1, and therefore, of course, a specific method for reliably forming the crimping portion j is not disclosed at all. Not.

  The present invention has been made in view of the conventional problems as described above, and its object is to position the first continuous sheet and the second continuous sheet at a position where an elastic member such as a continuous thread rubber is cut in the composite sheet. The purpose is to surely form a pressure-bonding portion with the continuous sheet to suppress damage to the sheet-like member.

The main invention for achieving the above object is:
A method for producing a sheet-like member having a high stretch region and a low stretch region having lower stretchability in a predetermined direction than the high stretch region, arranged in the predetermined direction,
Between the first continuous sheet that continues in the predetermined direction and the second continuous sheet that continues in the predetermined direction, an elastic member that extends in the predetermined direction and is inserted in the predetermined direction is inserted, at least Conveying the composite sheet fixed in the region corresponding to the high expansion / contraction region with the predetermined direction as the conveyance direction;
By cutting the elastic member at one place in the transport direction in the region corresponding to the low expansion / contraction region, and contracting the elastic member toward the region corresponding to the high expansion / contraction region, the composite sheet Forming a high stretch region and the low stretch region side by side in the transport direction,
In the forming, when the composite sheet passes along the transport direction between the cutter rotating body and the anvil rotating body that rotate to face each other, the outer periphery of the cutter rotating body. The surface cutter blade and the anvil rotator sandwich the composite sheet in a state where there is a gap between them, so that the first continuous sheet and the first Cutting the elastic member while forming a crimping part with two continuous sheets,
The composite sheet has a plurality of the elastic members arranged in the CD direction intersecting the transport direction,
The cutter blade is provided in association with each of the plurality of elastic members ,
The basis weight of the first continuous sheet is smaller than the basis weight of the second continuous sheet,
In the forming, the cutter blade is in contact with the composite sheet from the first continuous sheet side, and cuts the elastic member, whereby the sheet-like member manufacturing method according to the absorbent article is provided. .

Also,
An apparatus for manufacturing a sheet-like member having a high stretch region and a low stretch region having lower stretchability in a predetermined direction than the high stretch region, arranged in the predetermined direction,
Between the first continuous sheet and the second continuous sheet that are continuous in the predetermined direction, an elastic member that is continuous in the predetermined direction in an extended state in the predetermined direction is inserted, and at least a region that corresponds to the high stretchable region A transport device that transports the composite sheet fixed in step 1 with the predetermined direction as the transport direction;
By cutting the elastic member at one place in the transport direction in the region corresponding to the low expansion / contraction region, and contracting the elastic member toward the region corresponding to the high expansion / contraction region, the composite sheet A cutter device that forms a high stretch region and the low stretch region in the transport direction,
The cutter device includes a cutter rotating body and an anvil rotating body that rotate to face each other's outer peripheral surfaces,
When the composite sheet passes along the transport direction between the cutter rotator and the anvil rotator, the cutter blade on the outer peripheral surface of the cutter rotator and the anvil rotator are between each other. The elastic member is formed while the pressure-bonding portion between the first continuous sheet and the second continuous sheet is formed at the position where the composite sheet is clamped by clamping the composite sheet with a gap in between. Cut and
The composite sheet has a plurality of the elastic members arranged in the CD direction intersecting the transport direction,
The cutter blade is provided in association with each of the plurality of elastic members ,
The basis weight of the first continuous sheet is smaller than the basis weight of the second continuous sheet,
The cutter blade is an apparatus for manufacturing a sheet-like member according to an absorbent article , wherein the cutter blade contacts the composite sheet from the first continuous sheet side to cut the elastic member .

  Other features of the present invention will become apparent from the description of the present specification and the accompanying drawings.

  According to the present invention, it is possible to reliably form the pressure-bonding portion between the first continuous sheet and the second continuous sheet at the position where the elastic member such as the thread rubber continuous body is cut in the composite sheet. Damage to the sheet-like member can be suppressed.

FIG. 6 is a schematic plan view showing a process of generating a sheet-like member 20s ′ having a high stretch region AH ′ and a low stretch region AL ′. 1 is a schematic perspective view of a three-piece disposable diaper 1 as an example of an absorbent article according to the present embodiment. It is the schematic plan view which looked at the diaper 1 of the unfolding state from the skin side. It is the schematic plan view which looked at the same diaper 1 from the non-skin side. 5A is a cross-sectional view taken along the line AA in FIG. 3, and FIG. 5B is a cross-sectional view taken along the line BB in FIG. It is VI-VI sectional drawing in FIG. It is the schematic plan view which looked at the ventral belt member 20a from the non-skin side. It is the schematic plan view which looked at the belly side belt member 20a before cutting the rubber thread 27s from the non-skin side. FIG. 9A is a schematic plan view of the sheet-like member 20asb immediately before being conveyed to the manufacturing apparatus 30 of the present embodiment, and FIG. 9B illustrates that the expansion areas AH and AH and the non-expandable area AL are formed by the manufacturing apparatus 30. It is a schematic plan view of the formed sheet-like member 20as. FIG. 10A is a schematic side view of the manufacturing apparatus 30, and FIG. 10B is a BB arrow view in FIG. 10A. It is explanatory drawing of the arrangement | positioning state of cutter blade C provided in the cutter block 54 of the cutter roll 51d, Comprising: It is a figure which expand | deploys and shows the outer peripheral surface 51da of the roll 51d on the plane. It is a general | schematic expanded side view which shows the clearance gap G formed between the blade edge | tip of the cutter blade C, and the outer peripheral surface 51ua of the anvil roll 51u. It is a schematic plan view of the modification of the arrangement pattern of cutter blade C, C .... It is a schematic plan view of the other example of the sheet-like member 20asb which the manufacturing apparatus 30 of this embodiment can process suitably. It is a schematic side view which shows a mode that the sheet-like member 20asb which can be processed similarly is processed with the manufacturing apparatus 30. FIG. It is a schematic plan view of an arrangement pattern in which one cutter blade C is associated with a continuous body 27s of two or three thread rubbers.

  At least the following matters will become apparent from the description of the present specification and the accompanying drawings.

A method for producing a sheet-like member having a high stretch region and a low stretch region having lower stretchability in a predetermined direction than the high stretch region, arranged in the predetermined direction,
Between the first continuous sheet that continues in the predetermined direction and the second continuous sheet that continues in the predetermined direction, an elastic member that extends in the predetermined direction and is inserted in the predetermined direction is inserted, at least Conveying the composite sheet fixed in the region corresponding to the high expansion / contraction region with the predetermined direction as the conveyance direction;
By cutting the elastic member at one place in the transport direction in the region corresponding to the low expansion / contraction region, and contracting the elastic member toward the region corresponding to the high expansion / contraction region, the composite sheet Forming a high stretch region and the low stretch region side by side in the transport direction,
In the forming, when the composite sheet passes along the transport direction between the cutter rotating body and the anvil rotating body that rotate to face each other, the outer periphery of the cutter rotating body. The surface cutter blade and the anvil rotator sandwich the composite sheet in a state where there is a gap between them, so that the first continuous sheet and the first A method for producing a sheet-like member according to an absorbent article, wherein the elastic member is cut while forming a crimping portion with two continuous sheets.

  According to the method for manufacturing a sheet-like member according to such an absorbent article, the cutter blade and the anvil rotator sandwich the composite sheet in a state where there is a gap between the cutter blade and the anvil rotator. Here, the gap functions as a space for forming a pressure-bonding portion between the first continuous sheet and the second continuous sheet when the elastic member is cut by the cutter blade. Therefore, the crimping part can be reliably formed. Thus, it is possible to effectively avoid the first continuous sheet and the second continuous sheet from being partially cut and penetrating in the thickness direction with the cutting of the elastic member. As a result, it is possible to suppress damage to the finally generated sheet-like member.

A method for producing a sheet-like member according to such an absorbent article,
When the direction intersecting the transport direction is the CD direction,
The film member that the composite sheet has between the second continuous sheet and the elastic member is disposed across the both directions of the transport direction and the CD direction at a position where the composite sheet is clamped by the cutter blade. Has been
In the forming, the cutter blade is preferably in contact with the composite sheet from the first continuous sheet side to cut the elastic member.

  According to the manufacturing method of the sheet-like member related to such an absorbent article, when the cutter blade cuts the elastic member, the film member serves as an underlay or chopping board that supports the elastic member from the opposite side of the cutter blade. The elastic member can be supported so as not to move in the clamping direction. Therefore, it is possible to effectively prevent the elastic member from sinking in the pinching direction, which can occur during cutting, and as a result, the elastic member can be cut with high cutting performance.

A method for producing a sheet-like member according to such an absorbent article,
The basis weight of the first continuous sheet is smaller than the basis weight of the second continuous sheet,
In the forming, the cutter blade is preferably in contact with the composite sheet from the first continuous sheet side to cut the elastic member.

  According to the method for manufacturing a sheet-like member according to such an absorbent article, when the cutter blade cuts the elastic member, the second continuous sheet having a larger basis weight is arranged so that the elastic member is removed from the opposite side of the cutter blade. Functions as an underlaying or cutting board to support. That is, the second continuous sheet can support the elastic member so as not to move in the clamping direction with high rigidity due to the large basis weight. As a result, it is possible to effectively prevent the elastic member from sinking in the pinching direction, which can occur during cutting, and as a result, the elastic member can be cut with high cutting performance.

A method for producing a sheet-like member according to such an absorbent article,
The cutting edge of the cutter blade is preferably inclined with respect to the direction along the rotation axis of the cutter rotating body.

  According to the manufacturing method of the sheet-like member which concerns on such an absorbent article, the blade edge | tip of the cutter blade inclines with respect to the direction in alignment with the rotation direction of a cutter rotary body. Therefore, as compared with the case where the blade edge is parallel to the direction along the rotation axis direction, the cutting time of the elastic member can be ensured longer by the amount of inclination. And thereby, an elastic member can be cut | disconnected reliably.

A method for producing a sheet-like member according to such an absorbent article,
The composite sheet has a plurality of the elastic members arranged in the CD direction intersecting the transport direction,
A plurality of the cutter blades are arranged at positions shifted from each other in the CD direction on the outer peripheral surface of the cutter rotating body in correspondence with the plurality of elastic members, and the plurality of the cutter blades Among the plurality of cutter blades, after one elastic blade is cut by one of the cutter blades and the one cutter blade is still pressing the composite sheet with the anvil rotating body. The other cutter blade for cutting the other elastic member next is already in a state of sandwiching the composite sheet with the anvil rotator,
It is desirable that at least one cutter blade is located at a position between the one cutter blade and the other cutter blade in the CD direction.

  According to the method for manufacturing a sheet-like member according to such an absorbent article, it is possible to suppress vibration that may occur in the cutter rotating body when the elastic member is cut. As a result, it is possible to stabilize the cutting of the cutter blade and to effectively prevent the above-described crimping portion from penetrating due to vibration. In addition, the reason which can suppress a vibration is as follows, for example.

  First, after the one cutter blade cuts an elastic member, and when the cutter blade is still sandwiching the composite sheet with the anvil rotating body, another cutter that cuts the other elastic member next. The blade is already in a state of sandwiching the composite sheet with the anvil rotating body. Therefore, the cutting reaction force that can act on the cutter rotating body along with the cutting can be received not only by the one cutter blade but also by the other cutter blade after the cutting. It is possible to suppress the vibration of the cutter rotating body that can be caused by the fluctuation of the reaction force of the cutting after the cutting in the two-point support state. As a result, the vibration of the cutter rotating body can be effectively suppressed.

  In addition, at least one cutter blade is located between the one cutter blade and the other cutter blade in the CD direction, so that the cutter blades that are in the two-point support state are placed in the CD direction. Can be separated greatly. That is, the support span of two-point support can be increased. This can effectively contribute to the stabilization of the two-point support state, and as a result, the vibration of the cutter rotating body can be more reliably suppressed.

A method for producing a sheet-like member according to such an absorbent article,
It is desirable that the number of the cutter blades that simultaneously clamp the composite sheet with the anvil rotating body over all the cutter blades of the plurality of cutter blades is 2 or less.

  According to the manufacturing method of the sheet-like member related to such an absorbent article, the number of cutter blades that simultaneously clamp the composite sheet with the anvil rotating body is set to 2 or less. Therefore, it is possible to effectively prevent the pinching force applied to the cutter blade from being dispersed and reduced in a large number of cutter blades, and as a result, each elastic member can be reliably cut.

A method for producing a sheet-like member according to such an absorbent article,
The cutting edge of the cutter blade has an extending direction in which the cutting edge extends, and a blade width direction orthogonal to the extending direction,
The dimension in the blade width direction is preferably 0.1 mm to 1 mm.

  According to the method for manufacturing a sheet-like member according to such an absorbent article, the dimension in the blade width direction is 1 mm or less, while the elastic member can be reliably cut, the same dimension is 0.1 mm. Based on the above, it is possible to effectively prevent the first continuous sheet and the second continuous sheet from being completely cut and to reliably form a crimping portion between these continuous sheets.

A method for producing a sheet-like member according to such an absorbent article,
The cutter rotator is a cutter roll that rotates around a rotation axis along a CD direction intersecting the transport direction,
The anvil rotator is an anvil roll that rotates around a rotation axis along the CD direction;
At least one of the cutter roll and the anvil roll has an annular protrusion protruding in an annular shape from the outer peripheral surface of the roll over the entire circumference in the rotation direction of the roll,
In the state where the outer peripheral surface of the annular protrusion is in contact with the anvil roll, it is desirable that the gap be formed between the cutter blade and the anvil roll.

  According to the manufacturing method of the sheet-like member related to such an absorbent article, in the state where the cutter rotating body and the anvil rotating body sandwich the composite sheet via the cutter blade, the annular protrusion and the anvil roll described above. The size of the gap is maintained at a substantially constant value. Further, in such a clamped state, various other gaps that can affect the gap, for example, a gap that is included in a bearing member for forming a rotating shaft of a cutter rotating body or an anvil rotating body may be reduced. Thus, the size of the gap between the cutter blade and the anvil roll can be maintained at a substantially constant value with high accuracy.

A method for producing a sheet-like member according to such an absorbent article,
The fineness of the elastic member is 400 dtex to 1000 dtex,
The size of the gap is preferably 1 μm to 20 μm.

  According to the method for manufacturing a sheet-like member according to such an absorbent article, while effectively avoiding the cutting of the first continuous sheet and the second continuous sheet that may occur in association with the cutting of the elastic member, the sheet-shaped member is 400 dtex to 1000 dtex. The elastic member having a fineness can be reliably cut.

Also,
An apparatus for manufacturing a sheet-like member having a high stretch region and a low stretch region having lower stretchability in a predetermined direction than the high stretch region, arranged in the predetermined direction,
Between the first continuous sheet and the second continuous sheet that are continuous in the predetermined direction, an elastic member that is continuous in the predetermined direction in an extended state in the predetermined direction is inserted, and at least a region that corresponds to the high stretchable region A transport device that transports the composite sheet fixed in step 1 with the predetermined direction as the transport direction;
By cutting the elastic member at one place in the transport direction in the region corresponding to the low expansion / contraction region, and contracting the elastic member toward the region corresponding to the high expansion / contraction region, the composite sheet A cutter device that forms a high stretch region and the low stretch region in the transport direction,
The cutter device includes a cutter rotating body and an anvil rotating body that rotate to face each other's outer peripheral surfaces,
When the composite sheet passes along the transport direction between the cutter rotator and the anvil rotator, the cutter blade on the outer peripheral surface of the cutter rotator and the anvil rotator are between each other. The elastic member is formed while the pressure-bonding portion between the first continuous sheet and the second continuous sheet is formed at the position where the composite sheet is clamped by clamping the composite sheet with a gap in between. It is the manufacturing apparatus of the sheet-like member which concerns on the absorbent article characterized by cutting | disconnecting.

  According to the manufacturing apparatus of the sheet-like member which concerns on such an absorbent article, there can exist an effect similar to the case of the manufacturing method mentioned above.

=== This Embodiment ===
The manufacturing method and the manufacturing apparatus 30 of the sheet-like member 20as which concern on the absorbent article of this embodiment are used in the manufacturing line of the disposable diaper 1 as an example of an absorbent article, for example. FIG. 2 is a schematic perspective view of a three-piece type disposable diaper 1 as an example of the disposable diaper 1. FIG. 3 is a schematic plan view of the unfolded diaper 1 as seen from the skin side, and FIG. 4 is a schematic plan view of the diaper 1 as seen from the non-skin side. 5A is a sectional view taken along line AA in FIG. 3, FIG. 5B is a sectional view taken along line BB in FIG. 3, and FIG. 6 is a sectional view taken along line VI-VI in FIG.

  As shown in FIG. 3, FIG. 5A, and FIG. 6, this diaper 1 has a vertical direction, a horizontal direction, and a thickness direction as three directions orthogonal to each other. Moreover, since the diaper 1 is what is called a three-piece type, it has the absorptive main body 10 which is applied to a wearer's crotch part and absorbs excrement, such as urine, as a 1st component, And it has the ventral side belt member 20a which covers the wearer's torso from the abdomen side, and has the back side band member 20b which covers the wearer's torso from the back side as the third part.

  In the deployed state of FIG. 3, the abdominal band member 20a and the dorsal band member 20b are arranged in parallel with a space between each other, while the absorbent main body 10 is stretched between them. End portions 10ea and 10eb in the longitudinal direction of the absorbent main body 10 are bonded and fixed to the nearest belt members 20a and 20b, respectively, and the external shape is substantially H-shaped in plan view. Also, from this state, the diaper 1 is folded in two with the substantially central portion CL10 in the longitudinal direction of the absorbent main body 10 as the folding position, and the belt members 20a, 20b facing each other in the folded state are worn by the wearer. When the portions 20ae and 20be to be brought into contact with the flank are welded and connected at the end portions 20ae and 20be in the lateral direction, the band members 20a and 20b are connected in an annular shape, thereby 2 is a pants-type diaper 1 in which a waist opening 1HB and a pair of leg openings 1HL, 1HL are formed as shown in FIG.

  The absorbent main body 10 absorbs the absorbent core 11, the liquid-permeable surface sheet 13 that covers the core 11 from the skin side and forms the skin side surface of the absorbent main body 10, and the core 11 from the non-skin side. A liquid-impermeable back sheet 15 that forms the non-skin side surface of the adhesive main body 10. The absorbent core 11 is formed by molding a liquid absorbent material such as pulp fiber or a super absorbent polymer as an example of a liquid absorbent fiber into a predetermined shape such as a substantially hourglass shape in plan view. In this example, the core 11 is covered with a liquid-permeable covering sheet 12, and the back sheet 15 has a two-layer structure having a nonwoven fabric 15nw and a resin film 15f. Not limited to this.

  Moreover, as shown in FIG.3 and FIG.5B, the absorptive main body 10 may have the solid gathers LSG and LSG as a leak-proof wall part in each edge part of a horizontal direction in order to prevent a side leak. Furthermore, elastic members 17r such as rubber thread are arranged on both sides of the absorbent main body 10 in the lateral direction, so that it corresponds to the leg openings 1HL and 1HL of the diaper 1 as shown in FIG. Stretchable leg gathers LG, LG may be formed on the portion to be stretched.

  On the other hand, as shown in FIGS. 3 and 4, the abdominal band member 20a and the dorsal band member 20b are respectively sheet-like members having a substantially rectangular shape in plan view that are long in the lateral direction, and as shown in FIGS. It has an outer layer sheet 21 and an inner layer sheet 22 laminated in the thickness direction. The inner layer sheet 22 is located on the skin side in the thickness direction with respect to the outer layer sheet 21. Moreover, both the sheets 21 and 22 are formed with flexible sheets, such as a nonwoven fabric, and the spun bond nonwoven fabric is used in this example. However, the present invention is not limited to this, and another type of non-woven fabric may be used, or a resin film or woven fabric may be used. In this example, a single fiber of polypropylene (PP) is used as a constituent fiber of the nonwoven fabric. However, the present invention is not limited to this, and a single fiber of other thermoplastic resin such as polyethylene (PE) may be used. Furthermore, a composite fiber such as a sheath core structure of PE and PP may be used.

  And the center area | region 20ac and 20bc of the horizontal direction in each strip | belt member 20a and 20b is piled up and joined to the non-skin side surface of each edge part 10ea and 10eb of the vertical direction of the absorptive main body 10. FIG.

  Incidentally, in this example, as shown in FIG. 3 and FIG. 6, the planar size of the outer layer sheet 21 is a size that protrudes outward in the vertical direction from the inner layer sheet 22, and the protruding portion of the outer layer sheet 21. 21p is folded inward in the longitudinal direction to cover the longitudinal end portion 22e of the inner layer sheet 22, but is not limited thereto.

  Further, the belt members 20a and 20b are provided with lateral stretchability so that the belt members 20a and 20b can firmly hold the wearer's torso when the diaper 1 is worn. However, from the viewpoint of suppressing the generation of wrinkles at the position of the absorbent core 11 of the absorbent main body 10 and preventing the deterioration of its liquid absorbency and leakproof properties, as shown in FIG. 4, the band members 20a and 20b In particular, in the regions 20ac and 20bc overlapping the absorbent core 11 of the absorbent main body 10, a non-stretchable region AL having almost no stretchability is formed.

  Hereinafter, this will be described. Here, the basic configuration of the abdominal band member 20a and the back band member 20b is the same. Therefore, in the following description, only the ventral band member 20a will be described, and the description of the dorsal band member 20b will be omitted. For convenience of explanation, as shown in the schematic plan view of FIG. 7, the ventral belt member 20a will be described below by dividing it into two regions AU and AD in the vertical direction. That is, the area AU located on the waistline opening 1HB side in the vertical direction is referred to as “upper area AU”, and the area AD located on the leg circumference opening 1HB side is referred to as “lower area AD”.

  As shown in FIG. 7, the absorbent core 11 of the absorbent main body 10 does not overlap with the upper region AU. Therefore, the region AU is given stretchability over the entire length in the lateral direction. In addition, the provision of stretchability is realized by a plurality of thread rubbers 25, 25... Arranged in the horizontal direction in a laterally stretched state and fixed in the same region AU in the vertical direction. The thread rubber 25 is fixed to the area AU by, for example, the thread rubber 25 or a hot melt adhesive applied to the area AU. Incidentally, examples of the fineness of the thread rubber 25 include 400 dtex to 1000 dtex, and specific examples of the thread rubber 25 include LYCRA (trademark). This also applies to the rubber thread 27 provided in the lower region AD described later.

  On the other hand, since the absorbent core 11 of the absorbent main body 10 overlaps the central region ADc in the lateral direction of the lower region AD, the central region ADc has a non-stretchable region AL that has almost no lateral stretchability. (Corresponding to a low expansion / contraction region) is formed, and since the absorbent core 11 does not substantially overlap the end side regions ADe, ADe located on both sides of the central region ADc, the end side region ADe , ADe are formed with stretchable areas AH, AH (corresponding to high stretchable areas) having higher stretchability than the non-stretchable area AL.

  Here, the non-stretchable region AL of the central region ADc and the stretchable regions AH, AH of the end regions ADe, ADe are formed as follows. First, as shown in FIG. 8, between the outer layer sheet 21 and the inner layer sheet 22, a plurality of thread rubbers 27s, 27s,... ing. Each thread rubber 27s is generally fixed with a hot melt adhesive in the region AH1 corresponding to the stretchable region AH in the end side region ADe, but in the region AL1 corresponding to the non-stretchable region AL in the central region ADc, Generally not fixed. Therefore, in the area AL1 corresponding to the non-stretchable area AL, the band member 20a is clamped from both sides in the thickness direction by a cutter device 50, which will be described later, whereby the thread rubbers 27s, 27s. As shown in FIG. 5, the cut rubber threads 27, 27... Shrink toward the end in the lateral direction, and generally do not stay in the region AL1 corresponding to the non-stretchable region AL in the central region ADc, but expand and contract in the end side region ADe. The region AH1 corresponding to the region AH remains approximately, and as a result, the non-stretchable region AL is formed in the central region ADc, and the stretchable region AH is formed in the end side region ADe.

  Incidentally, in this example, a linear crimping portion j is formed at each position PC1 that is clamped from both sides in the thickness direction of the abdominal band member 20a when cutting the rubber threads 27s, 27s. This will be described later.

  In the manufacturing apparatus 30 of the sheet-like member 20as of the present embodiment, a continuous body 20as in which a plurality of the above-described ventral band members 20a are connected in the lateral direction is generated as an example of the sheet-like member 20as. FIG. 9A is a schematic plan view for explaining the sheet-like member 20asb immediately before being conveyed to the manufacturing apparatus 30. FIG. At this time, the sheet-like member 20asb is in a state where a plurality of ventral belt members 20a, 20a,. That is, the sheet-like member 20asb includes a plurality of continuous thread rubbers 25s between a continuous sheet 21s (corresponding to the first continuous sheet) of the outer layer sheet and a continuous sheet 22s (corresponding to the second continuous sheet) of the inner layer sheet. , 25 s... And a plurality of thread rubber continuous bodies 27 s, 27 s... Are in a state of a composite sheet 20 asb in which both continuous sheets 21 s, 22 s are joined. The plurality of thread rubber continuums 25 s, 25 s... And the plurality of thread rubber continuums 27 s, 27 s... Extend in the continuous direction of the sheet-like member 20 asb (corresponding to a composite sheet) in the same continuous direction. The sheet-like member 20asb is arranged along the width direction along the way. And the area | region of the width direction in the sheet-like member 20asb is equivalent to the upper area | region AU of the ventral | abdominal band member 20a, and the area | region of the other side is equivalent to the lower area | region AD of the ventral | abdominal band member 20a. Therefore, in the former area AU, in order to form a stretchable region over the entire length in the continuous direction, a plurality of corresponding thread rubber continuous bodies 25 s, 25 s... It is fixed to each continuous sheet 21s, 22s related to the member 20asb with a hot melt adhesive. On the other hand, in the latter area AD, since the stretchable area AH and the non-stretchable area AL are formed side by side in the continuous direction, a plurality of corresponding thread rubber continuous bodies 27s, 27s. The continuous sheets 21s and 22s according to 20asb are intermittently fixed with a hot melt adhesive in a continuous direction. That is, in the continuous sheet 21s, 22s in FIG. 9A, in the region AH1 corresponding to the stretchable region AH, the thread rubber continuous bodies 27s, 27s... Are fixed by the hot melt adhesive, but correspond to the non-stretchable region AL. In the area AL1, it is not fixed. At this time, as shown in FIG. 9A, in each of the continuous sheets 21s and 22s, the area AH1 corresponding to the stretchable area AH and the area AL1 corresponding to the non-stretchable area AL are in a continuous direction at a ratio of 2 to 1. This is because the stretchable regions AH and AH exist on both sides in the lateral direction of the non-stretchable region AL in the single-cut ventral belt member 20a shown in FIG. However, here, it is not necessary to distinguish and explain the areas AH1 and AH1 corresponding to the two stretchable areas AH and AH adjacent to each other in FIG. 9A. Therefore, in the following, these two areas AH1 and AH1 are combined. This will be described as one area AH2. In this case, as shown in FIG. 9A, in the sheet-like member 20asb, regions AH2 corresponding to the stretchable regions AH and AH and regions AL1 corresponding to the non-stretchable regions AL appear alternately in the continuous direction. ing. The area AL1 corresponding to the non-stretchable area AL appears on the sheet-like member 20asb at the product pitch of the diaper 1 in the continuous direction. Therefore, in this manufacturing apparatus 30, the thread rubber continuums 27s, 27s,... Of the sheet-like member 20asb are cut at the product pitch of the diaper 1 in the continuous direction, and as shown in FIG. In 20 asb, stretchable areas AH, AH and non-stretchable areas AL are alternately formed in a continuous direction. And the continuous body 20as of ventral side belt member 20a, 20a ... as shown to the same FIG. 9B is produced | generated by the above.

  In the following description, the continuous direction of the sheet-like member 20asb is also referred to as “MD direction”, and the width direction of the sheet-like member 20asb is also referred to as “CD direction”. Incidentally, the thickness direction of the sheet-like member 20asb, the MD direction as the continuous direction, and the CD direction as the width direction are orthogonal to each other.

  10A is a schematic side view of the manufacturing apparatus 30, and FIG. 10B is a view taken along the line BB in FIG. 10A.

  As shown in FIG. 10A, the manufacturing apparatus 30 includes a transport device 40 that transports the sheet-like member 20asb having continuous thread rubbers 27s, 27s... With the MD direction as the transport direction, and the sheet-like member 20asb. And a cutter device 50 for cutting the thread rubber continuum 27s, 27s (corresponding to an elastic member).

  The transport device 40 includes, for example, a plurality of transport rollers 40R, 40R. And at least one of the plurality of transport rollers 40R, 40R ... is a drive roller that rotates around a rotation axis along the CD direction, and the transport roller 40R other than the drive roller is, for example, a sheet-like member This is a driven roller that rotates with 20 asb. In addition, it may replace with this conveyance roller 40R, or in addition to the roller 40R, the conveyance apparatus 40 may have a belt conveyor.

  The cutter device 50 is the same when cutting a pair of upper and lower rolls 51u, 51d rotating around a rotation axis along the CD direction, and a continuous body of thread rubber 27s, 27s... With the outer peripheral surfaces 51ua, 51da facing each other. And a housing 55 for receiving a reaction force of cutting acting on the rolls 51u and 51d.

  The pair of upper and lower rolls 51u and 51d are supported by bearing members 52u and 52d provided in the housing 55, respectively, so that they can rotate around a rotation axis parallel to the CD direction. The bearing member 52d of the lower roll 51d is fixed to the housing 55 so as not to move. The bearing member 52u of the upper roll 51u is fixed by an appropriate actuator 53 such as a hydraulic cylinder or an air cylinder fixed to the housing 55. It can be moved up and down in the up and down direction, which is the contact and separation direction with respect to the lower roll 51d. By controlling the actuator 53, the size of the gap between the outer peripheral surfaces 51ua and 51da of the pair of upper and lower rolls 51u and 51d and the size of the pressure contact force (N) as the force in the contact / separation direction can be adjusted. It has become.

  Further, each roll 51u, 51d is driven and rotated around the rotation axis by a servo motor (not shown) as a drive source. That is, the rotation is performed with the directions orthogonal to the rotation axis as the rotation directions Dc51u and Dc51d. Therefore, the sheet-like member 20asb fed between the outer peripheral surfaces 51ua and 51da of the pair of upper and lower rolls 51u and 51d passes between the outer peripheral surfaces 51ua and 51da and is sent downstream in the MD direction.

  Here, in this example, the lower roll 51d is a cutter roll (corresponding to a cutter rotating body), and the upper roll 51u is an anvil roll (corresponding to an anvil rotating body). That is, at least one cutter block 54 is provided on the outer peripheral surface 51da of the lower roll 51d at every angle corresponding to the product pitch of the diaper 1 in the rotation direction Dc51d. Specifically, in this example, as indicated by hatching in FIG. 10A, two cutter blocks 54 and 54 are provided at an angle of 180 ° in the rotation direction Dc51d. Further, each cutter block 54 is formed with a plurality of cutter blades C, C..., And the outer peripheral surface 51 ua of the upper roll 51 u which is an anvil roll is smooth so as to receive the cutter blades C, C. It is considered as a surface. The rolls 51u and 51d are controlled to rotate in conjunction with the conveying operation of the sheet-like member 20asb, so that each time the area AL1 corresponding to the non-expandable area AL passes, The cutter roll 51d rotates so that the cutter block 54 faces the surface.

  Therefore, each time the area AL1 corresponding to the non-stretchable area AL in FIG. 9A passes between the outer peripheral surfaces 51ua and 51da of the pair of rolls 51u and 51d, the area AL1 is the cutter block 54 of the cutter roll 51d. The cutter blades C, C... And the anvil roll 51u are clamped. Then, the thread rubber continuums 27s, 27s,... Are cut at the clamped positions PC1, respectively, so that the cut rubber thread 27 corresponds to the high expansion / contraction region AH as shown in FIG. 9B. The region AH1 contracts, and as a result, a non-stretchable region AL and a stretchable region AH are formed in the sheet-like member 20asb.

  FIG. 11 is an explanatory view of the arrangement state of the cutter blades C, C... Provided on the cutter block 54 of the cutter roll 51d, and shows the outer peripheral surface 51da of the roll 51d developed on a plane. In FIG. 11, continuous thread rubbers 27s, 27s,... Are also virtually shown. In FIG. 11, for the purpose of making it easy to compare the positional relationship in the rotational direction Dc51d (or MD direction), ruled lines parallel to the CD direction are also shown by two-dot chain lines. For the purpose of facilitating the comparison of positional relationships, ruled lines parallel to the rotation direction Dc51d (or MD direction) are also shown with two-dot chain lines. This also applies to FIGS. 13 and 16 which will be described later.

  As shown in FIG. 11, the cutter block 54 is provided with a plurality of cutter blades C, C... The length LC of the cutting edge in the extending direction is selected from a range of 4 mm to 30 mm, for example, and the dimension WC in the blade width direction orthogonal to the extending direction is selected from a range of 0.1 mm to 1 mm, for example. . However, the shape of the cutting edge is not limited to the linear shape as described above, and may be a zigzag broken line shape or a curved shape such as an arc line shape. Further, as will be described in detail later, each cutter blade C, C... Is provided in association with each of the rubber thread continuous bodies 27 s, 27 s. Therefore, the continuous bodies 27s, 27s... Of each rubber thread can be reliably cut at one place PC1 in the MD direction.

  Here, as shown in FIG. 10B, the cutter device 50 has side rings 51SR and 51SR at each end of the cutter roll 51d in the CD direction. Each side ring 51SR, 51SR is an annular protrusion that protrudes in an annular shape from the outer peripheral surface 51da of the cutter roll 51d over the entire circumference in the rotational direction Dc51d. In the state where the outer peripheral surface 51SRa of the side ring 51SR is in contact with the outer peripheral surface 51ua of the anvil roll 51u, as shown in the schematic enlarged side view of FIG. 12, the cutting edge of the cutter blade C and the outer peripheral surface of the anvil roll 51u A gap G is formed with 51 ua. Specifically, the size of the gap G is set to, for example, 1 μm to 20 μm, desirably 5 μm to 15 μm, and in this example, 10 μm.

  And if it is made like this, when the sheet-like member 20asb passes the cutter device 50, the cutter blade C of the cutter roll 51d and the outer peripheral surface 51ua of the anvil roll 51u form a gap G between each other. In this state, the sheet-like member 20asb is clamped, and when this is done, when the thread rubber continuous bodies 27s, 27s... Are cut at the pinched position PC1 in the sheet-like member 20asb, the same position PC1. In addition, the crimping portion j between the continuous sheet 21s of the outer layer sheet and the continuous sheet 22s of the inner layer sheet can be quickly formed. That is, at the time of cutting the continuous thread rubber 27s by the cutter blade C, the continuous sheet 21s and the continuous sheet 22s can enter the gap G, so that both the sheets 21s and 22s can enter the gap G. The crimping part j can be formed in a substantially film shape with a thickness of 10 μm, for example. As a result, it is effective that the continuous sheets 21s and 22s are partially cut and penetrated in the thickness direction at the clamped position PC1 with the cutting of the thread rubber continuous body 27s. As a result, damage to the continuum 20as of the ventral belt member 20a, which is the sheet-like member 20as that is finally generated, can be suppressed.

  Note that the state in which the side rings 51SR and 51SR are in contact with the anvil roll 51u is realized by the above-described actuator 53 such as a hydraulic cylinder exerting a vertical pressing force on both the cutter roll 51d and the anvil roll 51u. According to this contact state, the size of the gap G is maintained at a substantially constant value even when the sheet-like member 20asb is clamped by the cutter blade C and the anvil roll 51u. can do. Also, at this time, various other gaps that can affect the gap G, such as gaps (not shown, outer races or inner races and rolling elements) that the bearing members 52d and 52u of the cutter roll 51d and the anvil roll 51u have inside. Also, the clearance between the two is reduced based on the pressure contact force of the actuator 53 like so-called “backlash”. This also can effectively contribute to maintaining the size of the gap G at a constant value.

  Incidentally, in this example, although the side ring 51SR is provided in the cutter roll 51d, it is not restricted to this at all. That is, instead of the cutter roll 51d or in addition to the cutter roll 51d, the anvil roll 51u may be provided.

In this example, as shown in FIG. 10A, the sheet-like member 20asb is arranged so that the continuous sheet 21s of the outer layer sheet faces the cutter roll 51d and the continuous sheet 22s of the inner layer sheet faces the anvil roll 51u. Yes. The basis weight of the continuous sheet 22s of the inner layer sheet is made larger than the basis weight of the continuous sheet 21s of the outer layer sheet. For example, the basis weight of the former sheet 21s is 10 to 25 (g / m ² ), and the basis weight of the latter sheet 22s is 15 to 40 (g / m ² ). The cutter blade C abuts on the continuous sheet 22s of the outer layer sheet having a low basis weight and is sequentially pushed toward the continuous body 27s of the thread rubber and the continuous sheet 22s of the inner layer sheet. Therefore, at the time of cutting the thread rubber continuous body 27s, the inner layer sheet continuous body 22s has high rigidity due to its high basis weight, and the thread rubber continuous body 27s is reverse to the cutter blade C as if it were an underlay or a cutting board. Support effectively from the side. This effectively prevents the thread rubber continuous body 27s from sinking in the thickness direction (moving upward in the example of FIG. 10A) and the like. The continuous body 27s can be cut.

  By the way, when cutting the thread rubber continuous body 27s, the cutter roll 51d may vibrate. However, if the vibration is large, the thread rubber continuous body 27s may be cut unstably, or the linear crimping part j may be broken. In the worst case, the pressure-bonding portion j may penetrate. Therefore, in this example, the vibration of the cutter roll 51d is suppressed by devising the arrangement of the cutter blades C. Hereinafter, this device will be described.

  First, as described above with reference to FIG. 9A, the thread rubber continuums 27 s, 27 s... To be cut are placed in the MD direction in the lower region AD of the sheet-like member 20 asb along the MD direction. 11 are arranged side by side in the same CD direction with an appropriate interval between the adjacent thread rubber continuum 27s. Further, in this cutter roll 51d, the rotation operation is performed in conjunction with the conveying operation of the sheet-like member 20asb, thereby cutting the 11 thread rubber continuums 27s, 27s... As shown in FIG. 9B. , And is performed for each area AL1 corresponding to the non-stretchable area AL in the lower area AD. At that time, as shown in FIG. Is going on.

  Therefore, as shown in FIG. 11, each cutter block 54 on the outer peripheral surface 51 da of the cutter roll 51 d is provided with one cutter blade C for each of the thread rubber continuous bodies 27 s, 27 s. ing. For example, in this example, since 11 thread rubber continuums 27s, 27s,... Are arranged in the lower region AD as described above, each cutter block 54 has 11 cutter blades C, C ... is provided. Thus, each cutter blade C cuts one corresponding thread rubber continuous body 27 s at one PC in the MD direction.

  In addition, at each position PC1 where each cutter blade C is pinched by such cutting, the continuous sheet 21s of the outer layer sheet and the continuous sheet 22s of the inner layer sheet related to the sheet-like member 20asb are pressure-bonded, whereby FIG. 9B As shown in FIG. 11, as an example, a plurality of 11 linear crimping portions j, j... Are formed by shifting the position PC1 in the CD direction. Note that the concept of the linear crimp portion j includes a linear fused portion formed by fusing two continuous sheets 21s and 22s to each other. Furthermore, as shown in FIG. 11, these 11 cutter blades C are provided with their positions in the rotational direction Dc51d being shifted from each other. For convenience of explanation, each of the 11 cutter blades C is shown in FIG. New symbols C1 to C11 are respectively attached to the blades C, C... In the order in which they are arranged from the upstream side to the downstream side in the rotation direction Dc51d.

  On the other hand, when attention is paid to the two cutter blades C1 and C2 in FIG. 11, the two cutter blades C1 and C2 are arranged as follows. That is, these two cutter blades C1 and C2 are arranged adjacent to each other in the rotational direction Dc51d. Here, the blade edge of the cutter blade C1 located downstream in the rotational direction Dc51d is at least the same blade edge. At the position upstream of the rotational direction Dc51d from the position PC where the continuous thread rubber 27s is cut, the blade tip of the upstream cutter blade C2 overlaps the rotational direction Dc51d.

  And if it is such an arrangement | positioning relationship, after the former cutter blade C1 cut | disconnects the thread rubber continuous body 27s, the cutter blade C1 still clamps the sheet-like member 20asb with the anvil roll 51u. The latter cutter blade C2 for cutting the other thread rubber continuous body 27s next is already in a state of sandwiching the sheet-like member 20asb with the anvil roll 51u.

  Therefore, the cutting reaction force that can act on the cutter roll 51d along with the cutting can be received not only by the former cutter blade C1 but also by the latter cutter blade C2 after the cutting. The vibration of the cutter roll 51d that can occur with the fluctuation of the reaction force of the cutting after the cutting of the continuous body 27s can be suppressed in the two-point support state. As a result, the vibration of the cutter roll 51d can be effectively suppressed.

  Further, in this example, as shown in FIG. 11, at least one of two cutter blades C5 and C9 is located between the former cutter blade C1 and the latter cutter blade C2 in the CD direction. Thus, the cutter blades C1 and C2 that are in the two-point support state are greatly separated in the CD direction. That is, the support span in the two-point support state is increased. This can effectively contribute to stabilization of the two-point support state, and as a result, the vibration of the cutter roll 51d can be more reliably suppressed.

  Furthermore, as can be seen with reference to FIG. 11, the above-described arrangement relationship of the cutter blades C1 and C2 is also established when attention is paid to the cutter blades C2 and C3. The same holds true for blades C4 and C5, cutter blades C5 and C6, cutter blades C6 and C7, cutter blades C7 and C8, cutter blades C8 and C9, cutter blades C9 and C10, and cutter blades C10 and C11. ing.

  Therefore, in this example, any cutter blade C, C... Is in a two-point support state with a large support span as described above, except for the cutter blade C11 that finally cuts the thread rubber continuous body 27s. As a result, the vibration of the cutter roll 51d can be more effectively suppressed.

  However, it is not limited to this. That is, for at least two cutter blades C, C belonging to the same cutter block 54, if the two-point support state having a large support span as described above is established, the effect of suppressing the vibration of the cutter roll 51d is obtained. You can enjoy it accordingly.

  Further, in FIG. 11, when attention is paid to the two cutter blades C5 and C6 adjacent to the rotation direction Dc51d, when the cutter blade C5 located on the downstream side in the rotation direction Dc51d cuts the continuous body 27s of the rubber thread. The cutter blade C6 already positioned on the upstream side is also in a state of sandwiching the sheet-like member 20asb with the anvil roll 51u. That is, the upstream cutter blade C6 exists across the position PC where the downstream cutter blade C5 cuts the thread rubber continuous body 27s in the rotational direction Dc51d. More specifically, the vertical direction of the two-dot chain line in which the pointing position of the arrow PC indicating the cutting position of the cutter blade C5 in FIG. 11 overlaps the downstream end (right end in FIG. 11) of the cutter blade C6 in the rotation direction Dc51d. It is located slightly upstream (left side in FIG. 11) in the rotational direction Dc51d from the ruled line (ruled line along the CD direction).

  Therefore, the cutting reaction force that can act on the cutter roll 51d from when the cutter blade C5 is cut can be reliably received not only by the downstream cutter blade C5 but also by the upstream cutter blade C6. The vibration of the cutter roll 51d that can be caused by fluctuations in the cutting reaction force can be quickly suppressed in the two-point support state of the downstream cutter blade C5 and the upstream cutter blade C6.

  Incidentally, there are other pairs of cutter blades C and C that satisfy this requirement. For example, the above-mentioned two-point support state at the moment of cutting is also realized for a pair of cutter blades C3 and C4, a pair of cutter blades C7 and C8, a pair of cutter blades C9 and C10, and the like. Therefore, in the cutter device 50, the vibration of the cutter roll 51d can be more effectively suppressed.

  Further, in the example of FIG. 11, in order to form the overlapping relationship in the rotation direction Dc51d as described above without any problem, the direction of the cutter blades C and C is set to an inclination angle α having an appropriate size other than 90 ° from the CD direction. And all the cutter blades C, C... Are aligned not only in the magnitude of the inclination angle α but also in the direction of inclination. Specifically, in this example, the inclination angle α is set to 30 °, and with respect to the direction of inclination, the cutting edges of all the cutter blades C, C... Move toward the downstream side of the rotation direction Dc51d. They are set to be displaced to the same side in the CD direction (lower side in FIG. 11).

  And if it is set in this way, the change in the separation distance in the CD direction between the cutter blades C, C that are in a two-point support state can be reduced over the rotation direction Dc51d. The two-point support state can be stabilized.

  Further, as described above, if the cutting edge of the cutter blade C is inclined with respect to the CD direction (corresponding to the direction along the rotation axis), each of the corresponding amounts of inclination is compared to the case where the cutting edge is parallel to the CD direction. It is possible to ensure a long cutting time of the continuous thread rubber 27s. As a result, the continuous thread rubber 27s can be reliably cut.

  However, the cutter blades C and C are not limited to this as long as the cutter blades C and C can be overlapped in the rotation direction Dc51d and a long cutting time can be secured. That is, the magnitude of the inclination angle α is not limited to the above 30 °, and the magnitude of the inclination angle α may not be uniform over all the cutter blades C, C. It is not necessary to align the inclination direction over all the cutter blades C, C.

  In the example of FIG. 11, the number of cutter blades C that simultaneously sandwich the sheet-like member 20asb with the anvil roll 51u across all the cutter blades C1 to C11 belonging to the same cutter block 54 is 2 or less. ing. The numerical value of 2 is the minimum value of the number of cutter blades C that simultaneously clamp the sheet-like member 20asb. Therefore, it is possible to effectively prevent the pinching force applied to each cutter blade C through the above-described form of the pressure contact force from being dispersed and reduced in a large number of cutter blades C. The continuous thread rubber 27s can be reliably cut.

  FIG. 13 is a schematic plan view of a modified example of the arrangement pattern of the cutter blades C, C. For example, as shown in FIG. 4, the arrangement pattern of this modification is used for cutting all seven thread rubber continuums 27s, 27s... Arranged in the central area ADc in the lower area AD of the back band member 20b. Is done. Since it is obvious from this FIG. 13 that this arrangement pattern also satisfies all the above-mentioned rules, detailed description thereof will be omitted.

  FIG. 14 is a schematic plan view of another example of the sheet-like member 20asb that can be suitably processed by the manufacturing apparatus 30, and FIG. 15 is a schematic diagram illustrating how the sheet-like member 20asb is processed by the manufacturing apparatus 30. It is a side view.

  As shown in FIG. 14, a film member 28 is provided on the sheet-like member 20asb for the purpose of drawing a pattern such as an illustration. And this point is mainly different from the above-described sheet-like member 20asb of FIG. 9A, and other points are substantially the same as the sheet-like member 20asb. Therefore, in the following, this difference will be described, and the description other than that will be omitted.

  The film member 28 is made of a thermoplastic resin such as PE. And as shown in FIG. 14, the film member 28 is arrange | positioned straddling position PC1 pinched with the cutter blade C in the sheet-like member 20asb in both directions of MD direction and CD direction. More specifically, the positions PC1, PC1,... Sandwiched between all the cutter blades C, C,... Belonging to the cutter block 54 are provided so as to completely cover both the MD direction and the CD direction. As shown in the left part of FIG. 15, the film member 28 is interposed between the thread rubber continuous body 27 s and the inner sheet continuous body 22 s. The blade C comes into contact with the sheet-like member 20asb from the continuous sheet 21s side of the outer layer sheet, and cuts each continuous thread rubber 27s.

  Therefore, when the cutter blade C cuts the thread rubber continuous body 27s, the film member 28 supports the thread rubber continuous body 27s from the opposite side (upper side in FIG. 15) of the cutter blade C. As a result, the thread rubber continuum 27s can be supported so as not to move in the thickness direction (vertical direction), which is the clamping direction. Therefore, it is possible to effectively prevent the thread rubber continuous body 27s from sinking in the clamping direction (moving upward in FIG. 15) and the like, which can occur during cutting. As a result, the thread rubber continuous body 27s can be reliably secured with high cutting performance. Can be cut.

=== Other Embodiments ===
As mentioned above, although embodiment of this invention was described, said embodiment is for making an understanding of this invention easy, and is not for limiting and interpreting this invention. Further, the present invention can be changed or improved without departing from the gist thereof, and needless to say, the present invention includes equivalents thereof. For example, the following modifications are possible.

  In the above-described embodiment, the cutter roll 51d has the side ring 51SR, but the gap G (FIG. 12) can be formed between the cutter blade C of the cutter roll 51d and the outer peripheral surface 51ua of the anvil roll 51u. If so, the side ring 51SR may be omitted. For example, by controlling the position of the actuator 53 such as the aforementioned hydraulic cylinder shown in FIG. 10B, the vertical position as the contact / separation direction of the cutter roll 51d is adjusted so that the size of the gap G becomes a constant value. Anyway. Incidentally, in this case, a feed screw mechanism using a servo motor as a drive source can be used as the actuator 53 described above.

  In the above-described embodiment, as shown in FIG. 11, a plurality of thread rubber continuums 27s, 27s... Are exemplified as the plurality of elastic members, and each of the plurality of thread rubber continuums 27s, 27s. On the other hand, the cutter blades C, C... Are provided one by one, but the present invention is not limited to this. For example, as shown in FIG. 16, one or more cutter blades C may be associated with two or three continuous thread rubbers 27s as an example of two or more. That is, one cutter blade C may be provided so as to straddle two thread rubber continuums 27s, 27s or three thread rubber continuums 27s, 27s, 27s.

  In the above-described embodiment, the sheet-like member 20asb has the continuous sheet 21s of the outer layer sheet and the continuous sheet 22s of the inner layer sheet, but another continuous sheet may be laminated.

  In the embodiment described above, the thread rubber continuous body 27s is exemplified as the elastic member, but the elastic member is not limited thereto. For example, a belt-like elastic member such as a flat rubber continuous body may be used.

  In the above-described embodiment, the cutter roll 51d is illustrated as the cutter rotating body, and the anvil roll 51u is illustrated as the anvil rotating body. However, the present invention is not limited thereto. For example, an endless belt may be used as each of the cutter rotating body and the anvil rotating body.

  In above-mentioned embodiment, although the 3 piece type disposable diaper 1 was illustrated as an example of an absorbent article, it is not restricted to this at all. For example, a thread rubber continuous body 27s provided on a sheet-like member used in a two-piece type disposable diaper may be cut by the cutter device 50 described above. Incidentally, a two-piece type disposable diaper has a two-layered exterior sheet having an abdominal part, a crotch part, and a dorsal part as a first component, and is fixed to the skin side of the exterior sheet. This is a type of diaper having a sexable main body 10 as a second part. In this case, the continuous sheet of the exterior sheet corresponds to the above-described sheet-like member 20asb, and each of the thread rubber continuous bodies 27s, 27s... Is formed between two layers of the continuous sheet of the exterior sheet. It will be inserted in between.

  In above-mentioned embodiment, although the underpants type disposable diaper 1 was illustrated as an example of an absorbent article, it is not restricted to this at all. That is, it may be a tape-type disposable diaper. The tape-type disposable diaper has an abdominal side that covers the wearer's torso from the abdomen side and a back side that covers the torso from the back side. It is a type of diaper that uses a fastening tape to connect. Furthermore, the absorbent article is not limited to the disposable diaper 1 described above. That is, the manufacturing method and the manufacturing apparatus 30 of the present invention can be applied to any absorbent article that uses the sheet-like member 20asb as described above as a material. Therefore, the concept of this absorbent article includes a urine absorbing pad and a sanitary napkin.

1 disposable diaper (absorbent article), 1HB waist opening, 1HL leg opening, 10
Absorbent body, 10ea end, 10eb end, 11 absorbent core, 12 covering sheet, 13 surface sheet, 15 back sheet, 15f resin film, 15nw non-woven fabric, 17r elastic member, 20a ventral side band member, 20ac central region, 20ae End, 20be
End part, 20as sheet-like member, 20asb sheet-like member (composite sheet), 20b dorsal belt member, 21 outer layer sheet, 21p portion, 21s continuous sheet of outer layer sheet (first continuous sheet), 22 inner layer sheet, 22e end part, 22s Continuous sheet of inner layer sheet (second continuous sheet), 25 thread rubber, 25s thread rubber continuum, 27 thread rubber, 27s thread rubber continuum (elastic member), 28 film member, 30 manufacturing device, 40 transport device , 40R conveying roller, 50 cutter device, 51d cutter roll (cutter rotating body), 51da outer peripheral surface, 51u anvil roll (anvil rotating body), 51ua outer peripheral surface, 51SR side ring (annular protrusion), 51SRa outer peripheral surface, 52d bearing Member, 52u
Bearing member, 53 Actuator, 54 Cutter block, 55 Housing, C
Cutter blade, C1 cutter blade, C2 cutter blade, C3 cutter blade, C4 cutter blade, C5 cutter blade, C6 cutter blade, C7 cutter blade, C8 cutter blade, C9 cutter blade, C10 cutter blade, C11 cutter blade, CD1, dummy Cutter blade, CD9, dummy cutter blade, j linear crimping part (crimping part), G gap, AU upper region, AD lower region, ADc central region, ADe end side region, AH stretchable region (high stretchable region), AH1 area, AH2 area, AL non-stretchable area (low stretchable area), AL1 area, PC position, PC1 position, LSG solid gather, LG leg gathers, CL10 substantially central part,

Claims (10)

A method for producing a sheet-like member having a high stretch region and a low stretch region having lower stretchability in a predetermined direction than the high stretch region, arranged in the predetermined direction,
Between the first continuous sheet that continues in the predetermined direction and the second continuous sheet that continues in the predetermined direction, an elastic member that extends in the predetermined direction and is inserted in the predetermined direction is inserted, at least Conveying the composite sheet fixed in the region corresponding to the high expansion / contraction region with the predetermined direction as the conveyance direction;
By cutting the elastic member at one place in the transport direction in the region corresponding to the low expansion / contraction region, and contracting the elastic member toward the region corresponding to the high expansion / contraction region, the composite sheet Forming a high stretch region and the low stretch region side by side in the transport direction,
In the forming, when the composite sheet passes along the transport direction between the cutter rotating body and the anvil rotating body that rotate to face each other, the outer periphery of the cutter rotating body. The surface cutter blade and the anvil rotator sandwich the composite sheet in a state where there is a gap between them, so that the first continuous sheet and the first Cutting the elastic member while forming a crimping part with two continuous sheets,
The composite sheet has a plurality of the elastic members arranged in the CD direction intersecting the transport direction,
The cutter blade is provided in association with each of the plurality of elastic members ,
The basis weight of the first continuous sheet is smaller than the basis weight of the second continuous sheet,
In the forming, the cutter blade comes into contact with the composite sheet from the first continuous sheet side to cut the elastic member, and the method for producing a sheet-like member according to the absorbent article. It is a manufacturing method of the sheet-like member concerning the absorptive article according to claim 1,
When the direction intersecting the transport direction is the CD direction,
The film member that the composite sheet has between the second continuous sheet and the elastic member is disposed across the both directions of the transport direction and the CD direction at a position where the composite sheet is clamped by the cutter blade. Has been
In the forming, the cutter blade comes into contact with the composite sheet from the first continuous sheet side to cut the elastic member, and the method for producing a sheet-like member according to the absorbent article. It is a manufacturing method of the sheet-like member concerning the absorptive article according to claim 1 or 2 ,
The manufacturing method of the sheet-like member which concerns on the absorbent article characterized by the blade edge | tip of the said cutter blade inclining with respect to the direction in alignment with the rotating shaft of the said cutter rotary body. A method for producing a sheet-like member having a high stretch region and a low stretch region having lower stretchability in a predetermined direction than the high stretch region, arranged in the predetermined direction,
Between the first continuous sheet that continues in the predetermined direction and the second continuous sheet that continues in the predetermined direction, an elastic member that extends in the predetermined direction and is inserted in the predetermined direction is inserted, at least Conveying the composite sheet fixed in the region corresponding to the high expansion / contraction region with the predetermined direction as the conveyance direction;
By cutting the elastic member at one place in the transport direction in the region corresponding to the low expansion / contraction region, and contracting the elastic member toward the region corresponding to the high expansion / contraction region, the composite sheet Forming a high stretch region and the low stretch region side by side in the transport direction,
In the forming, when the composite sheet passes along the transport direction between the cutter rotating body and the anvil rotating body that rotate to face each other, the outer periphery of the cutter rotating body. The surface cutter blade and the anvil rotator sandwich the composite sheet in a state where there is a gap between them, so that the first continuous sheet and the first Cutting the elastic member while forming a crimping part with two continuous sheets,
The composite sheet has a plurality of the elastic members arranged in the CD direction intersecting the transport direction,
The cutter blade is provided in association with each of the plurality of elastic members,
A plurality of the cutter blades are arranged at positions shifted from each other in the CD direction on the outer peripheral surface of the cutter rotating body in correspondence with the plurality of elastic members, and the plurality of the cutter blades Among the plurality of cutter blades, after one elastic blade is cut by one of the cutter blades and the one cutter blade is still pressing the composite sheet with the anvil rotating body. The other cutter blade for cutting the other elastic member next is already in a state of sandwiching the composite sheet with the anvil rotator,
The method for producing a sheet-like member according to an absorbent article, wherein at least one cutter blade is located at a position between the one cutter blade and the other cutter blade in the CD direction. It is a manufacturing method of the sheet-like member concerning the absorptive article according to claim 4 ,
In the absorbent article, the number of the cutter blades that simultaneously clamp the composite sheet with the anvil rotator across all the cutter blades of the plurality of cutter blades is 2 or less. The manufacturing method of the sheet-like member which concerns. A method for manufacturing a sheet-like member according to any one of claims 1 to 5 ,
The cutting edge of the cutter blade has an extending direction in which the cutting edge extends, and a blade width direction orthogonal to the extending direction,
The dimension of the said blade width direction is 0.1 mm-1 mm, The manufacturing method of the sheet-like member which concerns on the absorbent article characterized by the above-mentioned. It is a manufacturing method of the sheet-like member concerning the absorptive article according to any one of claims 1 to 6 ,
The cutter rotator is a cutter roll that rotates around a rotation axis along a CD direction intersecting the transport direction,
The anvil rotator is an anvil roll that rotates around a rotation axis along the CD direction;
At least one of the cutter roll and the anvil roll has an annular protrusion protruding in an annular shape from the outer peripheral surface of the roll over the entire circumference in the rotation direction of the roll,
In the state where the outer peripheral surface of the annular protrusion is in contact with the anvil roll, the gap is formed between the cutter blade and the anvil roll. Manufacturing method. A method for manufacturing a sheet-like member according to any one of claims 1 to 7 ,
The fineness of the elastic member is 400 dtex to 1000 dtex,
The method for producing a sheet-like member according to an absorbent article, wherein the size of the gap is 1 μm to 20 μm. An apparatus for manufacturing a sheet-like member having a high stretch region and a low stretch region having lower stretchability in a predetermined direction than the high stretch region, arranged in the predetermined direction,
Between the first continuous sheet and the second continuous sheet that are continuous in the predetermined direction, an elastic member that is continuous in the predetermined direction in an extended state in the predetermined direction is inserted, and at least a region that corresponds to the high stretchable region A transport device that transports the composite sheet fixed in step 1 with the predetermined direction as the transport direction;
By cutting the elastic member at one place in the transport direction in the region corresponding to the low expansion / contraction region, and contracting the elastic member toward the region corresponding to the high expansion / contraction region, the composite sheet A cutter device that forms a high stretch region and the low stretch region in the transport direction,
The cutter device includes a cutter rotating body and an anvil rotating body that rotate to face each other's outer peripheral surfaces,
When the composite sheet passes along the transport direction between the cutter rotator and the anvil rotator, the cutter blade on the outer peripheral surface of the cutter rotator and the anvil rotator are between each other. The elastic member is formed while the pressure-bonding portion between the first continuous sheet and the second continuous sheet is formed at the position where the composite sheet is clamped by clamping the composite sheet with a gap in between. Cut and
The composite sheet has a plurality of the elastic members arranged in the CD direction intersecting the transport direction,
The cutter blade is provided in association with each of the plurality of elastic members ,
The basis weight of the first continuous sheet is smaller than the basis weight of the second continuous sheet,
The said cutter blade contacts the said composite sheet from the said 1st continuous sheet side, and cut | disconnects the said elastic member, The manufacturing apparatus of the sheet-like member which concerns on the absorbent article characterized by the above-mentioned . An apparatus for manufacturing a sheet-like member having a high stretch region and a low stretch region having lower stretchability in a predetermined direction than the high stretch region, arranged in the predetermined direction,
  Between the first continuous sheet and the second continuous sheet that are continuous in the predetermined direction, an elastic member that is continuous in the predetermined direction in an extended state in the predetermined direction is inserted, and at least a region that corresponds to the high stretchable region A transport device that transports the composite sheet fixed in step 1 with the predetermined direction as the transport direction;
  By cutting the elastic member at one place in the transport direction in the region corresponding to the low expansion / contraction region, and contracting the elastic member toward the region corresponding to the high expansion / contraction region, the composite sheet A cutter device that forms a high stretch region and the low stretch region in the transport direction,
  The cutter device includes a cutter rotating body and an anvil rotating body that rotate to face each other's outer peripheral surfaces,
  When the composite sheet passes along the transport direction between the cutter rotator and the anvil rotator, the cutter blade on the outer peripheral surface of the cutter rotator and the anvil rotator are between each other. The elastic member is formed while the pressure-bonding portion between the first continuous sheet and the second continuous sheet is formed at the position where the composite sheet is clamped by clamping the composite sheet with a gap in between. Cut and
  The composite sheet has a plurality of the elastic members arranged in the CD direction intersecting the transport direction,
  The cutter blade is provided in association with each of the plurality of elastic members,
A plurality of the cutter blades are arranged at positions shifted from each other in the CD direction on the outer peripheral surface of the cutter rotating body in correspondence with the plurality of elastic members, and the plurality of the cutter blades Among the plurality of cutter blades, after one elastic blade is cut by one of the cutter blades and the one cutter blade is still pressing the composite sheet with the anvil rotating body. The other cutter blade for cutting the other elastic member next is already in a state of sandwiching the composite sheet with the anvil rotator,
  An apparatus for manufacturing a sheet-like member according to an absorbent article, wherein at least one cutter blade is located at a position between the one cutter blade and the other cutter blade in the CD direction.

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