CN105473111A - Disposable diaper manufacturing method and disposable diaper - Google Patents

Abstract

The purpose of the present invention is to make the overall manufacturing equipment for pant-type and T-type disposable diapers more compact and to produce diapers efficiently by keeping waste of materials to a minimum. The diaper manufacturing method is characterized in that: a base material sheet (8) obtained from a continuous sheet material (W) and an elastic member (11) is continuously supplied in a feed direction (A); an absorbent body (5) is attached to the base material sheet (W) in the central portion of the width direction; the base material sheet (W) is divided into a pair of waist-encircling sheet portions (9a, 9b) and a single crotch covering sheet portion (10) by two dividing lines (18) along the longitudinal direction of the base material sheet; the crotch covering sheet portion (10) is cut at a prescribed length to form individual crotch coverings (6); the crotch coverings (6) are joined one by one alternately to one or the other waist-encircling sheet portion (9a, 9b); the waist-encircling sheet portions (9a, 9b) are cut at an intermediate position between crotch coverings (6) that are adjacent to each other; the crotch sections (3) are folded in two; and the sections near the two ends of the waist-encircling sections (2) are folded inward and each of said ends is fixed to the free end of the crotch section (3).

Description

Manufacturing method of disposable diaper and disposable diaper

technical field

The present invention relates to a method of manufacturing a disposable diaper and the same.

Background technique

In general, a disposable diaper includes a waist portion worn around the trunk of a wearer, and a crotch portion fixed to the waist portion. The waist portion includes an elastic member for the body that expands and contracts in the direction of the waist so as to fit the wearer's body. On the other hand, the crotch portion includes an absorber and the like on the inner side (wearer side) of the exterior sheet, and elastic members for leg circumference stretchable along the side edges so as to fit the wearer's legs.

The disposable diaper sometimes fixes one side end of the crotch at the lower central part of a piece of waist extending left and right, and the disposable diaper is formed into a T-shape in an unfolded state (for example, refer to Patent Document 1. Hereinafter referred to as present There is technology 1.). As the wearing article of the prior art 1, the crotch part is folded into two parts, and the waist part extending to the side of the crotch part is folded inward, and each end thereof is placed on the front side of the wearer. Fixed to the free end of the crotch, thus assembled into a disposable diaper.

In the prior art 1 described above, the girth part is manufactured while conveying each material in the longitudinal direction. That is, the elastic member for the body part is bonded to the continuously fed sheet in a state of being stretched in the longitudinal direction of the sheet to form an elastic laminate, which is continuously fed in the feeding direction. In this case, the feeding direction of the elastic laminate coincides with the stretching direction of the elastic member for the body part. Therefore, the said elastic member for trunk|drums can be easily conveyed in the state maintained in the stretched state, and the said disposable diaper can be manufactured continuously easily.

However, in said prior art 1, a waist part and a crotch part are manufactured by mutually different production lines. Therefore, it is difficult to achieve compactness of the entire manufacturing facility.

Moreover, the exterior body of a waist part and a crotch part consists of mutually different materials. Therefore, there is a problem that manufacturing operations become cumbersome.

In addition, in the case of covering the wearer's buttocks in a wide range, etc., when the separately manufactured waist and crotch adopt a predetermined shape other than a rectangle, when cutting out a sheet of a predetermined shape from a continuous sheet, it is necessary to cut off excess. part. Therefore, there is also a problem of waste of material (so-called pruning loss).

In order to solve these problems, it has been proposed to perform the crotch production process on the same production line as the waistline production process (for example, refer to Patent Document 2. Hereinafter referred to as Prior Art 2.).

In this prior art 2, a strip-shaped sheet base material having a predetermined width is conveyed along its continuous direction, and the middle portion in the width direction of the strip-shaped sheet base material is used as an outer covering sheet portion for the crotch portion. The crotch portion is formed by laminating the absorber and the top sheet in the outer sheet portion, and an abdominal waist portion and a back waist portion are respectively formed on both sides in the width direction. Then, in the dividing process, the crotch portion is divided from the abdominal waist portion and the back waist portion, and the divided crotch portion is cut at predetermined intervals on another production line, and the single body is divided into individual parts. crotch.

prior art literature

patent documents

Patent Document 1: JP03-195555A

Patent Document 2: JP2010-51667A

In the prior art 2, since the waist portion and the crotch portion are formed of a single belt-shaped base material sheet and divided, there is an advantage that the entire manufacturing facility can be made compact. However, the unfolded state of the disposable diaper of this prior art is formed in an H-shape, and since the abdominal waist part and the back waist part are joined at the side part of the diaper, there are the following problems.

That is, needless to say, welding is performed at the joint of both waist parts, even if a detachable joint such as a hook-and-loop fastener is used, its rigidity is higher than that of a normal sheet. The side portion of the diaper is a portion that tends to bend, deform, etc. following the body movement of the wearer. Therefore, when the flexibility of this side part deteriorates, the wearing feeling of a diaper will deteriorate easily.

In addition, when a caregiver or the like puts on the diaper while facing the wearer, it is troublesome to engage and detach the joining portion at the side of the diaper.

On the other hand, in this prior art 2, the abdominal waist, the back waist, and the crotch need to have the same length as each other. Therefore, this prior art 2 cannot be applied to a diaper in which the developed state is T-shaped like the prior art 1, and the overall length of the waist portion and the length of the crotch portion are significantly different from each other.

Contents of the invention

The object of the present invention is to provide a manufacturing method of a disposable diaper and a disposable diaper, the unfolded state of the disposable diaper is T-shaped, the manufacturing operation can be simplified on the basis of making the manufacturing equipment compact as a whole, and the waste of materials can be suppressed Get less and produce efficiently.

In order to solve the above-mentioned problems, for example, the present invention will be described based on FIGS. 1 to 9 showing embodiments of the present invention, and will be configured as follows.

That is, the present invention relates to a method of manufacturing a disposable diaper comprising a waist portion (2) worn around the trunk of a wearer, and one end portion (31) fixed to the waist portion ( 2) The crotch part (3) of the central part (2C) in the waistline direction (R) is equipped with an absorbent body (5) for absorbing excrement in the crotch part (3), characterized in that,

The manufacturing method of described disposable diaper comprises the following steps:

A base material supply process (S1), in which a base material sheet (8) consisting of a continuous sheet (W) of a predetermined width and The elastic members (11) arranged in the longitudinal direction of the continuous sheet (W) are laminated;

A base material dividing step (S3) in which the base material sheet (8) is divided into a pair of waist portion sheet parts (9a, 9b) along two dividing lines (18) extending in the longitudinal direction. ) and a crotch exterior sheet portion (10);

crotch part individual dividing step (S4), in which step, the front end part of the crotch part exterior sheet part (10) is cut successively at the predetermined cutting pitch (L) in the said longitudinal direction, and the single part is divided into A crotch exterior body (6) of a specified length;

Joining step (S5), in which the one end portion (61) of the crotch exterior body (6) divided into single parts is arranged at a pitch equal to twice the length of the crotch exterior body (6) ( P) Alternately join one waist part (9a) and the other waist part (9b) one by one;

Absorber mounting step (S2), in which the center portion in the width direction of the base material sheet (8) before the base material dividing step (S3) and the center portion of the base material sheet (8) after the base material dividing step (S3) The absorber (5) is attached to any one of the crotch exterior sheet part (10) or the crotch exterior body (6) after monomer division; and

A diaper individual dividing step (S6), in which the waist portion (9a, 9b) to which the crotch exterior body (6) is fixed is divided between adjacent crotch exterior bodies (6) The middle position is cut, and the monomer is divided into individual disposable diapers (1).

Moreover, the disposable diaper which concerns on this invention is a disposable diaper manufactured by the manufacturing method of this invention, It is characterized in that the length of the said crotch part (3) is half of the length of the said waist part (2).

A waist portion sheet portion constituting the waist portion and a crotch portion exterior sheet portion constituting the crotch portion exterior body are divided from a base sheet composed of a continuous sheet having a predetermined width and an elastic member. Therefore, the material supply process of both is shared, and the overall manufacturing equipment becomes compact accordingly, and raw materials are shared on this basis, so raw material management, raw material replacement, etc. are simplified.

In addition, since the length of the waist part is twice the length of the crotch part, it is set to a length suitable for a T-shaped diaper in an unfolded state, and waste of material does not occur. In addition, since the waist portion and the crotch outer sheet are divided by the two dividing lines, by making the dividing lines into desired shapes, there is no need to cut off excess parts, and the parts are cut out from the base sheet. For example, a desired shape such as a shape that covers a wide range of the wearer's buttocks.

The unfolded state of the disposable diaper obtained by the said manufacturing method is T shape. For this T-shaped disposable diaper, the crotch is folded into two parts, and the two ends of the waist are folded inwardly, and each end of the waist is respectively fixed to the free end of the crotch as required, after that, Packaging is carried out in the packaging process. During packaging, the ends of the waist portion may be fixed inseparably by gluing or the like, or may be detachably fixed using a fastening mechanism such as a hook-and-loop fastener.

In the present invention, "pitch" means a dimension indicating the interval (period) when objects of the same shape are arranged at equal intervals.

It should be noted that the absorber attaching step can be performed at any timing before the single body is divided into disposable diapers, for example, each crotch exterior body fixed to the waist portion sheet portion after the joining step can be separately Install the absorber. However, if the absorber is attached to the central portion of the base sheet in the width direction at a predetermined interval before the substrate dividing step, or is placed at a predetermined interval after the substrate dividing step, If the crotch outer sheet is partially attached to the absorber, the top sheet made of a liquid-permeable sheet can be continuously supplied and attached to cover the absorber, or the back sheet composed of a liquid-impermeable sheet can be continuously supplied and attached to the absorbent body. Between the absorber and the base sheet, etc., it is preferable.

Since the present invention is configured and functions as described above, the following effects are obtained.

(1) The waist portion and the crotch outer sheet are separated from a common base sheet, and the material supply process for both is shared, so that the overall manufacturing facility can be made compact, and raw materials can be simplified on this basis. Management, raw material replacement and other manufacturing operations.

(2) Since the length of the waist portion is twice the length of the crotch portion, a waist portion of a length suitable for a T-shaped diaper in an unfolded state can be obtained without waste of material. In addition, the waist portion and the crotch outer sheet are divided by the two dividing lines. Therefore, by making the dividing lines into desired shapes, it is not necessary to cut off excess parts. Cutting out a desired shape such as a shape that covers the wearer's buttocks in a wide range can reduce or eliminate the occurrence of trimming loss.

(3) The unfolded state of the obtained disposable diaper is T-shaped, and each end of the waist portion is fixed to the end of the crotch on the front side of the wearer. Therefore, even if the joint is harder than other parts, it is not easy to apply The deformation that occurs following the body movement of the wearer can maintain a good wearing feeling. In addition, in the case where the end of the waist portion can be engaged and detached, the joining portion is formed on the front side of the wearer, so even in a posture where the caregiver and the wearer face each other, the joint can be easily performed. Snap-off operation.

Description of drawings

Fig. 1 is a perspective view of a disposable diaper according to an embodiment of the present invention.

Fig. 2 is a schematic configuration diagram of a manufacturing apparatus of a disposable diaper according to an embodiment of the present invention.

Fig. 3 is a schematic perspective view showing the manufacturing procedure of the disposable diaper according to the embodiment of the present invention.

Fig. 4 is a schematic plan view showing the manufacturing procedure of the disposable diaper according to the embodiment of the present invention.

Fig. 5 is a schematic plan view showing the manufacturing procedure of the disposable diaper according to the embodiment of the present invention.

Fig. 6 is an explanatory diagram of a base material dividing step in an embodiment of the present invention.

Fig. 7 is an explanatory diagram of a crotch portion unit dividing step and joining step according to the embodiment of the present invention.

Fig. 8A is a cutaway plan view showing the disposable diaper layout in the unfolded state after the diaper is divided into individual parts in the diaper individual division step according to the embodiment of the present invention, and Fig. 8B and Fig. 8C are cross-sectional views thereof.

Fig. 9 is a schematic perspective view showing a substrate supplying step of another example of the present invention.

detailed description

In a preferred manufacturing method, before the base material dividing step (S3), the elastic member (11) is disposed on the base material sheet (8) divided by the dividing line (18). Each waist part (9a, 9b) is arranged at a part of the crotch outer sheet part (10) close to the parting line (18).

In this case, by splitting the elastic member (11) arranged along the feed direction (A) with the splitting line (18), two kinds of elastic members for the trunk and for the leg circumference can be formed.

It is preferable that the elastic members disposed on the respective waist portions constitute the elastic members for the body portion, and the elastic members disposed on the crotch outer portion constitute the elastic members for the leg circumference. When the elastic member includes the elastic member for the body part and the elastic member for leg circumferences, since both elastic members can be arranged on the continuous sheet in the same process, the process can be further simplified.

In addition, these elastic members should just be elastic members expandable and contractible in a predetermined direction, and may be either linear body or belt-shaped body.

The parting line may also be a straight line along the feeding direction of the base sheet. In this case, the waist portion and the crotch outer sheet portion are both formed to have a constant width, and the waist formed by them Both the body and the crotch exterior body are formed in a rectangle. However, it is preferable that the parting line can be set in any shape, for example, the parting line is formed to be smaller than the width of the waist part part at the position cut in the diaper individual parting step. In the joining step, the width of the waist sheet portion at the position where the crotch exterior body is fixed is large. In this case, since the center part of the waist part of the disposable diaper obtained becomes wide, since the buttocks of a wearer can be well covered, it is preferable.

More preferably, the parting line (18) is formed such that the width of the waist panel parts (9a, 9b) is at the arrangement pitch equal to twice the length of the crotch exterior body (6). (P) Make changes.

In this case, as described above, no waste of material occurs.

Preferably, the dividing line (18) is formed so that the waist portion ( 2) The height (Hc) of the central portion (2C) in the waist direction (R) is relatively large.

In this case, the wearer's buttocks can be well covered.

Preferably, the dividing line (18) is formed such that the width of the crotch exterior sheet portion (10) in the width direction is twice the length of the crotch exterior body (6). The pitch (P) is varied.

In this case, no waste of material occurs.

In a preferred disposable diaper, the length of said crotch portion (3) is half the length of said waist portion (2).

In this case, no waste of material occurs.

In addition, the outer body of the crotch portion can be set to any shape, and may also be rectangular, but the width of one end portion fixed to the central portion of the waist portion is wider than that of the other end portion fixed to the waist portion. In the case of the width of the end part, since the wearer's buttocks can be well covered, it is preferable.

Features described and/or illustrated in relation to one of the above-described embodiments or the following embodiments can be used in the same or similar manner in one or more other embodiments or other embodiments, and/or with Features of other embodiments or examples are used in combination, or instead of features of other embodiments or examples, and are used.

Example

The present invention will be understood more clearly from the following description of preferred embodiments with reference to the accompanying drawings. However, the examples and drawings are for illustration and description only, and should not be used to limit the scope of the present invention. The scope of the invention is limited only by the claims. In the drawings, the same reference numerals in a plurality of drawings indicate the same or corresponding parts.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

As shown in Figure 1, the disposable diaper (1) has a ring-shaped waist portion (2) worn around the body of the wearer, and an end portion (31) on one side is fixed to the waist portion (2). The crotch portion (3) of the central portion (2C). The waist portion (2) is formed of an elastic laminate in which a body portion elastic member (4) elongated in the waist direction (R) is fixed to a sheet (W). The crotch portion (3) is provided with an absorber (5) for absorbing excrement on the skin side of the crotch portion exterior body (6). Elastic members (7) for leg circumferences are fixed to the crotch exterior body (6) along side edges.

The said disposable diaper (1) is manufactured with the manufacturing apparatus shown in FIG. 2, for example.

The manufacturing process based on this manufacturing device includes: a base material supply process (S1) in which the base material sheet (8) is continuously supplied in the feed direction (A); The absorber installation process (S2) of installing the absorber (5); the base material sheet (8) in Fig. 4 is divided into a pair of waistline part (9a, 9b) and a crotch outer sheet part (10 ) base material dividing step (S3); the crotch unit dividing step (S4) of obtaining the crotch outer body (6) by successively cutting the crotch outer covering sheet part (10) into predetermined lengths; The joining process (S5) in which the external body (6) is alternately joined to one waist part sheet part (9a) and the other waist part part (9b) one by one; a diaper individual dividing step (S6) in which the parts (9a, 9b) are cut at the middle position between the adjacent crotch exterior bodies (6); and the crotch of the diaper (1) after the individual division (3) Folding step (S7) of folding into two parts and fixing each end part (2E) of the waist part (2) to the free end of the crotch part (3).

As shown in FIGS. 2 and 3 , the substrate sheet ( 8 ) continuously supplied along the feed direction (A) in the substrate supply step ( S1 ) is made of a continuous sheet made of nonwoven fabric, that is, two sheets of a predetermined width. A continuous sheet (W) and an elastic member (11) sandwiched between the two sheets (W) in a state of being stretched in the longitudinal direction are formed. Each continuous sheet (W) and the elastic member (11) are mutually fixed by adhesives, such as a hot-melt adhesive, for example.

The elastic member (11) in FIG. 3 includes an elastic member for the trunk (4) arranged on the side edge side of the base sheet (8), and an elastic member for leg circumference (7) arranged on the central side. Urethane, natural rubber, thermoplastic resin, etc. can be used as a material of these elastic members (11). As the shape of the elastic member (11), a linear shape, a strip shape, or the like can be used, and the elastic member is not limited to one, but may be multiple. When a thermoplastic resin is used as a material and it has the function of bonding with a continuous sheet (W), a hot-melt adhesive is unnecessary. It should be noted that the elastic member (4) for the trunk and the elastic member (7) for leg circumference may use the same material and shape, or may use different materials and shapes.

In the absorber mounting step (S2), a backsheet (12) made of a liquid-impermeable material is bonded in advance to the middle portion of the base sheet (8) in the width direction, and the backsheet (12) is sandwiched between the backsheet ( 12) The absorbers (5) are installed at regular intervals. For example, as shown in FIG. 2, in the absorbent body forming process (S8), the pulp (13) is pulverized by a pulverizer (14), and the fluff after defibration is laminated on a graphic drum (15), thereby making the absorbent body (5 ). It should be noted that, as the liquid-impermeable material, for example, a polyethylene film, a non-woven fabric having hydrophobicity and air permeability, and the like are preferable.

When installing the absorber (5) in Figure 3, the surface sheet (16) covering the absorber (5) and made of liquid-permeable material, the sheet cuffs arranged on both sides of the absorber (5) (17) is attached to the base sheet (8). This cuff (17) is produced by the cuff formation process (S9) shown in FIG. 2, for example. In addition, as a liquid-permeable material which comprises the said top sheet (16), for example, a liquid-permeable nonwoven fabric, a mesh sheet, etc. are preferable.

It may also be configured such that a transfer sheet (transfer sheet) is interposed between the top sheet (16) and the absorber (5) in FIG. (16) LEAKOUT.

In addition, for the absorbent body (5), it is also possible to disperse a superabsorbent polymer in the fluff. In this case, it is preferable to wrap the absorbent body (5) with a tissue to avoid high Absorbent polymer overflows from the pile. In addition, the said absorber can also be comprised with the material which carried the superabsorbent polymer on nonwoven fabric etc.

As shown in FIG. 2, the base material sheet (8) attached with the absorber (5) of FIG. The two dividing lines (18, 18) of 4 are divided into three parts, that is, a pair of waist part sheet parts (9a, 9b) along each side edge of the base material sheet (8) and the base material sheet (8 A crotch exterior sheet portion (10) of the middle portion of ). In more detail, as shown in Figure 6, the position near the side edge of the substrate sheet (8) and the location near the substrate sheet (8) are separated by two dividing lines (18, 18) periodically displaced along the width direction. The central part is divided into three parts. The obtained waist sheet portions (9a, 9b) and the crotch outer sheet portion (10) were respectively cut into a shape in which wide portions and narrow portions are repeated alternately.

That is, in the base material dividing step (S3), the dividing line (18) is formed such that the width of the waist panel parts (9a, 9b) in FIG. 7 is equal to that of the crotch exterior body (6). The configuration pitch (P) of twice the length is varied.

In addition, in the base material dividing step (S3) in FIG. 6, the dividing line (18) is formed so as to be aligned with both ends (2E) in the waistline direction (R) of the waistline (2) in FIG. ), the height (Hc) of the central portion (2C) in the waistline direction (R) of the waistline portion (2) is larger than the height (He) of the waistline portion (2).

In addition, in the base material dividing step (S3) in FIG. 6, the dividing line (18) is formed such that the width in the width direction of the crotch exterior sheet portion (10) in FIG. Configure the pitch (P) to vary.

In the case where the dividing line (18) is wavy, the cuff (17) may be straight. In addition, when the cuff (17) is curved in a wave shape, the cuff (17) may also be formed of elastic nonwoven fabric. It should be noted that, in this embodiment, the dividing line (18) is formed in a wavy line shape that repeats at a constant pitch, but in the present invention, it may also be formed in a linear shape along the longitudinal direction of the substrate sheet. , in this case, it is possible to obtain the constant-width waist portion (9a, 9b) and the constant-width crotch exterior sheet portion (10).

The parting line (18) shown in Fig. 6 is formed between the elastic member (4) for the body part and the elastic member (7) for leg circumference. That is, the elastic member (4) for the body part is disposed on the side edge side of the base material sheet (8) than the parting line (18), thereby being disposed on each of the waist part use sheet parts (9a). , 9b). In addition, the elastic member (7) for leg circumference is arranged on the central side of the base sheet (8) than the parting line (18) and at a position close to the parting line (18), thereby being arranged on the parting line (18). The portion near the side edge of the crotch outer sheet portion (10) is described.

As shown in Fig. 4, the crotch exterior sheet part (10) obtained by the division in the base material division step (S3) is passed through the cutting device (20) in the crotch unit division step (S4) every It is cut between adjacent absorbers (5) at predetermined lengths, and is divided into crotch exterior body (6) as a single unit. At this time, the crotch exterior sheet portion (10) is cut at the central position of the wide portion and the central position of the narrow portion in the longitudinal direction, and one end portion ( 61) is wider than the other end (62).

As shown in Fig. 4 and Fig. 7, the said crotch exterior body (6) which has been divided into single parts is alternately one by one with one waist part sheet by the transfer device (21) in the joining step (S5). The part (9a) is joined to the other waist part (9b). At this time, the wide end portion (61) of each crotch exterior body (6) is joined to the central portion (2C) of the wide portion of each waist portion sheet portion (9a, 9b).

As described above, the crotch outer sheet portion (10) in FIG. 4 is cut at predetermined intervals in the longitudinal direction, that is, at the center of the wide portion and the center of the narrow portion. Therefore, two pieces of crotch exterior body (6) are cut out between the central positions of adjacent narrow width parts, therefore, the waistline portion of Fig. 7 corresponding to the narrow width part of the crotch exterior sheet part (10) An arrangement pitch (P) twice the length (L) of the crotch exterior body (6) is formed at the central position of the wide portion of the sheet portions (9a, 9b). Therefore, the crotch exterior body (6) separates one end (61) of the crotch exterior body (6) and The waist part is joined with sheet parts (9a, 9b).

As shown in Fig. 5, the waist portion sheet portions (9a, 9b) to which the crotch exterior body (6) is fixed are adjacent to each other by a cutting device (22) in the diaper individual dividing step (S6). The crotch exterior body (6) is cut at the middle position of each other, that is, at the center position of the narrow width part of the waist part (9a, 9b), and the unit is divided into independent disposable diapers (1) .

In this embodiment, the parting line (18) is formed to be smaller than the width of the waist part part (9a, 9b) at the position cut in the diaper individual parting step (S6). The width of the waist portion sheet portion (9a, 9b) at the position where the crotch exterior body (6) is fixed in the joining step (S5) is wide. Therefore, as shown in Figure 8, the central part (2C) of the waistline part (2) of the obtained disposable diaper (1) is formed into a wide width, and one end part (31) of the crotch part (3) joined here ) is also formed in a wide width, and as a result, the wearer's buttocks can be well wrapped, so it is preferable. However, in the present invention, it is also possible to form the girdle portion to have a constant width.

As shown in Fig. 5, in the folding process (S7), the crotch part (3) is folded into two parts by two bending devices (23) in the said disposable diaper after the individual division. The two ends (2E) of the waistline (2) are attached with fixing mechanisms (26) respectively, and the two ends of the waistline (2) are folded inwardly by the assembly device (24), and each end (2E) They are respectively fixed at the free ends of the crotch (3) by means of fixing mechanisms (26). The fixing mechanism (26) fixing the end portion (2E) of the waist portion (2) may be a mechanism that is fixed by an adhesive such as a hot-melt adhesive so that it cannot be separated, or may be a surface connector that can be engaged and separated. link mechanism.

Thereafter, the folded independent disposable diaper (1) is changed into an appropriate posture by the reversing device (25), and sent out to the next packaging process.

The manufacturing method of the disposable diaper described in the above-mentioned embodiment is an example for the purpose of actualizing the technical thought of the present invention, and the shape, size, material, manufacturing procedure, etc. of each member are not limited to the case of the present embodiment. Various modifications can be added to the claims.

For example, in the above-described examples, the absorber is attached to the central portion of the base material sheet before being divided in the base material dividing step. However, in the present invention, the absorber may be attached to the crotch exterior sheet portion obtained by dividing in the base material dividing step, and, for example, may be attached to each crotch exterior body fixed to the waist portion sheet portion. Attach the absorber to the crotch outer body which is divided into a single body.

In addition, in the above-described examples, the elastic members for leg circumferences are previously arranged on the base material sheet together with the elastic members for body parts, and are divided into three parts by dividing lines. However, in the present invention, only the elastic members for the trunk may be arranged on the base sheet in advance, and the elastic members for the legs may be arranged together with the backsheet and the like on the crotch outer sheet after being divided by, for example, the base material dividing step.

Moreover, in the said Example, the base material sheet was comprised by sandwiching the elastic member between two continuous sheets of predetermined width. However, in the present invention, for example, an elastic member may be interposed between one continuous sheet having a predetermined width and two continuous sheets having a narrow width arranged along each side edge thereof. In addition, it is also possible to use a wide continuous sheet, fold both side edges inward to form a base sheet having a predetermined width, and sandwich the elastic member between the folded portions.

In addition, in the above-described examples, the base sheet, the top sheet, flap cuffs (also referred to as side panels, three-dimensional gathers, etc.) and the like are laminated on the base sheet. However, in the present invention, at least any one of these laminated sheets may also be used as a continuous sheet constituting the base sheet.

For example, in the embodiment, the two continuous sheets are constituted by continuous sheets, respectively. However, in the present invention, for example, at least one continuous sheet may be constituted by a liquid-impermeable sheet, and the continuous sheet may also be used as a backsheet.

In addition, as in the modified example shown in FIG. 9, for example, a continuous sheet (W) of a predetermined width and the outer edge portion (17a) of the sheet-shaped cuff (17) arranged inside it may also be used to constitute the base sheet. (8). That is, in this modified example, an elastic member (11) is arranged on the side edge side of a continuous sheet (W) of a predetermined width, and the graphic roller (15) passes through the bottom sheet (12) in the middle part in the width direction. ) to install the absorber (5). Then, above the absorber (5), configure the surface layer sheet (16) and the sheet-shaped cuffs (17) fixed along its two side edges, and connect the outer edge portion (17a) of the cuff (17) with the The elastic member (11) is sandwiched between the continuous sheets (W) and integrated. That is, the outer edge portion (17a) of the cuff (17) doubles as a continuous sheet (W), and the outer edge portion (17a), the continuous sheet (W) of predetermined width, and the elastic member between the two (11) Forming the substrate sheet (8). In addition, reference numeral (17b) represents the elastic member for cuffs arrange|positioned at the inner side edge part of cuffs (17). The other structures are the same as the above-mentioned embodiment, and since they function in the same way, explanations are omitted.

In addition, in the present invention, in the above modification, instead of the outer edge of the cuff, the outer edge of the top sheet can also be used as a continuous sheet. An elastic member is interposed between continuous sheets, thereby forming the substrate sheet. In addition, in this case or the modified example, the continuous sheet having the predetermined width may also be used as the base sheet, whereby the number of sheets to be laminated can be further reduced.

In addition, in the above-mentioned embodiment, the dividing line is formed into a wavy line shape, and is divided into a pair of sheet parts for the waist part along each side edge of the base material sheet, and a crotch outer covering sheet located in the middle part of the base material sheet. part. However, in the present invention, the dividing line may be formed linearly, and in this case, the crotch exterior sheet portion can also be formed along one side edge of the base sheet.

In the present invention, it goes without saying that the constituent materials, dimensions, shapes, etc. of the sheet, elastic member, and absorber are not limited to those of the above-described examples.

Industrial availability

The present invention can be applied to underpants-type and T-type disposable diapers.

Explanation of reference signs

1: Disposable diaper; 2: Waistline; 2C: Center; 2E: End

3: crotch; 31: one end; 32: other end

5: absorbent body; 6: crotch exterior body; 61: one end; 62: other end

8: Base sheet; 9a: One waist sheet portion; 9b: The other waist sheet portion

10: crotch outer part; 11: elastic member; 18: dividing line

L: Cutting pitch; P: Arrangement pitch; W: Continuous sheet (sheet)

S1: Base material supply process; S2: Absorber mounting process; S3: Base material dividing process; S4: Crotch part monomer dividing process

S5: joining process; S6: diaper individual dividing process; S7: folding process

Claims (8)

1. A method of manufacturing a disposable diaper comprising a waist portion (2) and a crotch portion (3), the waist portion (2) being worn around the body of a wearer, and the crotch portion (3) ) is fixed to the central portion (2C) of the waistline (2) in the waistline direction (R), and the crotch portion (3) is equipped with an absorbent body (5) for absorbing excrement , characterized in that, The manufacturing method of described disposable diaper comprises the following steps: A base material supply process (S1), in which a base material sheet (8) consisting of a continuous sheet (W) of a predetermined width and The elastic members (11) arranged in the longitudinal direction of the continuous sheet (W) are stacked; A base material dividing step (S3) in which the base material sheet (8) is divided into a pair of waist portion sheet parts (9a, 9b) along two dividing lines (18) extending in the longitudinal direction. ) and a crotch exterior sheet portion (10); crotch part individual dividing step (S4), in which step, the front end part of the crotch part exterior sheet part (10) is cut successively at the predetermined cutting pitch (L) in the said longitudinal direction, and the single part is divided into A crotch exterior body (6) of a specified length; Joining step (S5), in which the one end portion (61) of the crotch exterior body (6) divided into single parts is arranged at a pitch equal to twice the length of the crotch exterior body (6) ( P) Alternately join one waist part (9a) and the other waist part (9b) one by one; Absorber mounting step (S2), in which the center portion in the width direction of the base material sheet (8) before the base material dividing step (S3) and the center portion of the base material sheet (8) after the base material dividing step (S3) The absorber (5) is attached to any one of the crotch exterior sheet part (10) or the crotch exterior body (6) after monomer division; and A diaper individual dividing step (S6), in which the waist panel portions (9a, 9b) to which the crotch exterior body (6) is fixed are placed between adjacent crotch exterior bodies (6). The middle position is cut off, and the monomer is divided into disposable diapers (1) one by one. 2. The manufacturing method of a disposable diaper according to claim 1, wherein: Prior to the base material dividing step (S3), the elastic member (11) is arranged on each waist portion sheet portion ( 9a, 9b), and the elastic member (11) is arranged in the part of the crotch outer panel part (10) close to the parting line (18). 3. The manufacturing method of a disposable diaper according to claim 1 or 2, wherein: In the base material dividing step (S3), the dividing line (18) is formed so as to be aligned with the waist portion sheet parts (9a, 9b) at the positions cut in the diaper individual dividing step (S6). ) is wider than the width of the waist portion sheet portions (9a, 9b) at the position where the crotch exterior body (6) is fixed in the joining step (S5). 4. The manufacturing method of a disposable diaper according to claim 3, wherein: In the base material dividing step (S3), the dividing line (18) is formed so that the width of the waist panel parts (9a, 9b) is equal to the length of the crotch exterior body (6). Two times the arrangement pitch (P) is varied. 5. The manufacturing method of a disposable diaper according to claim 1 or 2, wherein: In the base material dividing step (S3), the dividing line (18) is formed at a height (He) from both ends (2E) of the waistline (2) in the waistline direction (R). The height (Hc) of the central portion (2C) in the waist direction (R) of the waist portion (2) is greater than that of the waist portion (2). 6. The method of manufacturing a disposable diaper according to claim 5, wherein: In the base material dividing step (S3), the dividing line (18) is formed such that the width in the width direction of the crotch exterior sheet portion (10) is equal to that of the crotch exterior body (6). The configuration pitch (P) of twice the length is varied. 7. A disposable diaper manufactured by the manufacturing method according to claim 1 or 2, characterized in that: The length of the crotch portion (3) is half the length of the waist portion (2). 8. The disposable diaper according to claim 7, wherein: The crotch outer body (6) is configured such that the width of an end (31) fixed to one side of the central portion of the waist portion (2) is wider than that of each end portion of the waist portion (2) to be fixed. The width of the end (32) on the other side.