JP3989477B2 - Method for manufacturing surface sheet of absorbent article - Google Patents

Description

The present invention relates to a method of manufacturing a surface sheet of the absorbent article.

  There is known a surface sheet of an absorbent article formed by forming uneven ridges on a perforated plastic sheet (see Patent Document 1). In order to produce this perforated plastic sheet, first, a melt pattern is formed by a melt pattern application roll that is held to a tension of 5 to 40% or less and heated to the softening point of the plastic sheet. The melt pattern is applied so that the virtual lines extending in the substantially extending direction connecting the regions that are not formed are not linearly continuous but have a zigzag pattern or a rhombus pattern. Subsequently, the tension is released to cause residual distortion in the sheet. Due to the residual strain, irregularly undulating irregularities are generated and wrinkles are formed.

  When the perforated plastic sheet is used as a top sheet, it is described in Patent Document 1 that it may be previously laminated with a second sheet and integrated. In such a usage, a hollow space is formed between the convex portion of the perforated plastic sheet and the second sheet. This space becomes a liquid pool of excreted liquid, and the quick transfer of the liquid to the second sheet is prevented. Also, wetback is likely to occur.

JP 2002-160293 A

Accordingly, an object of the present invention is to provide a method for producing a surface sheet of an absorbent article that can eliminate the various disadvantages of the above-described prior art.

The present invention is a surface sheet of an absorbent article comprising a perforated plastic sheet facing the wearer's skin side and a fiber sheet facing the absorber side,
Both sheets are joined by crimping with embossment, with the fiber sheet extended in at least one direction,
The embossed portion formed by embossing has a shape having a longitudinal direction and a width direction, and is formed so that the longitudinal direction intersects the extending direction of the fiber sheet,
A surface sheet of an absorbent article in which a perforated plastic sheet is recessed in the embossed portion, a large number of recesses are formed in the surface sheet, and the recesses are formed as protrusions, and a part of the fiber sheet enters the protrusions. A manufacturing method of
Under the condition that the fiber sheet extended in at least one direction is overlapped with the perforated plastic sheet, both sheets are joined and integrated by pressure bonding with embossing,
The fiber sheet is contracted by releasing the stretched state of the fiber sheet to form a large number of uneven portions, and the porous plastic sheet is deformed to form a large number of uneven portions as the fiber sheet contracts, Including a step of inserting a part of the fiber sheet into a convex portion formed in the perforated plastic sheet,
By embossing only the fiber sheet in advance in a state where the fiber sheet is stretched in at least one direction, the strain in the stretched state is fixed,
Next, while maintaining the stretched state of the fiber sheet, or once releasing the stretched state, the fiber sheet is stretched again and the fiber sheet is overlapped with the plastic sheet, and both sheets are pressure-bonded by embossing. The object is achieved by providing a method for producing a surface sheet of an absorbent article that is joined and integrated with each other.

Further, the present invention is a surface sheet of an absorbent article comprising a perforated plastic sheet facing the wearer's skin side and a fiber sheet facing the absorber side,
Both sheets are joined by crimping with embossment, with the fiber sheet extended in at least one direction,
The embossed portion formed by embossing has a shape having a longitudinal direction and a width direction, and is formed so that the longitudinal direction intersects the extending direction of the fiber sheet,
A surface sheet of an absorbent article in which a perforated plastic sheet is recessed in the embossed portion, a large number of recessed portions are formed in the surface sheet, and the recessed portion is formed as a protruding portion, and a part of the fiber sheet enters the protruding portion. A manufacturing method of
Under the condition that the fiber sheet extended in at least one direction is overlapped with the perforated plastic sheet, both sheets are joined and integrated by pressure bonding with embossing,
The fiber sheet is contracted by releasing the stretched state of the fiber sheet to form a large number of uneven portions, and the porous plastic sheet is deformed to form a large number of uneven portions as the fiber sheet contracts, Including a step of inserting a part of the fiber sheet into a convex portion formed in the perforated plastic sheet ,
In addition to the fiber sheet, the plastic sheet is also stretched, and the two sheets are overlapped and joined and integrated. In the overlap, the extent of the plastic sheet is lower than the extent of the fiber sheet. The manufacturing method of the surface sheet of an absorptive article to be performed is provided.

According to the surface sheet manufactured by the method of the present invention, the liquid is rapidly transferred from the upper porous plastic sheet to the lower fiber sheet, and the surface of the porous plastic sheet inherently feels smooth. Becomes prominent. In addition, the wet-back of the liquid once absorbed is unlikely to occur, and the dryness of the surface becomes remarkable.

The present invention will be described below based on preferred embodiments with reference to the drawings. In the following description, for convenience, the surface sheet of the absorbent article manufactured by the method of the present invention is referred to as the surface sheet of the absorbent article of the present invention. FIG. 1 shows a cross-sectional view of an embodiment of the top sheet of the absorbent article of the present invention. A top sheet 1 shown in FIG. 1 includes a perforated plastic sheet 2 facing the wearer's skin and a fiber sheet 3 facing the absorber. Both sheets 2 and 3 are joined by pressure bonding with embossing in a state where the fiber sheet 3 is extended in at least one direction. A number of embossed portions 4 are formed on the topsheet 1 by this joining.

  A large number of apertures 5 are formed in the perforated plastic sheet 2. The excreted liquid moves through the opening 5 to the lower fiber sheet 3 and the absorber (not shown) disposed below the fiber sheet 3.

  The fiber sheet 3 is consolidated at the embossed portion 4. Depending on the embossing conditions, the fiber may be melted and solidified to form a film. On the other hand, the perforated plastic sheet 2 is recessed at the embossed portion 4 to form a large number of recessed portions 6. And between the recessed parts 6 is made into the convex part 7. FIG. As a result, the porous plastic sheet 2 is formed with a large number of uneven portions over the entire area. And also as the whole surface sheet 1, many uneven | corrugated | grooved parts are formed over the whole region.

  As shown in FIG. 1, a part of the fiber sheet 3 enters the convex portion 7. That is, the constituent fibers of the fiber sheet 3 enter. As a result, the liquid that has passed through the aperture 5 of the perforated plastic sheet 2 is easily drawn into the fiber sheet 3 by the capillary force of the constituent fibers of the fiber sheet 3. As a result, it is difficult for liquid residue to occur between the perforated plastic sheet 2 and the fiber sheet 3, and the top sheet 1 has a light feeling. In a particularly preferred embodiment, the inside of the convex portion 7 is filled with the constituent fibers of the fiber sheet 3. However, as long as the liquid transfer from the perforated plastic sheet 2 to the fiber sheet 3 is not hindered, a partial space may exist inside the convex portion 7.

  FIG. 2 shows various shapes and arrangement patterns of the embossed portions 4. Each embossed portion 4 shown in FIG. 2 has a shape having a longitudinal direction and a width direction. When the embossed portion 4 having such a shape is formed so that the longitudinal direction thereof intersects the extending direction of the fiber sheet, the uneven shape is effectively formed, and the constituent fibers of the fiber sheet 3 are formed in the convex portion 7. Enough to get into.

  The embossed portion 4 shown in FIG. 2A is formed so that its longitudinal direction is orthogonal to the extending direction of the fiber sheet. The embossed part 4 forms a row in the longitudinal direction, and the row is arranged in multiple rows. Between adjacent rows, the arrangement of the embossed portions 4 is shifted by a half pitch. It is preferable that the space | interval of the adjacent embossed part 4 in a longitudinal direction is 1-15 mm, and it is still more preferable that it is 3-6 mm. The distance between the rows is preferably 0.5 to 10 mm, and more preferably 2 to 5 mm. In the case where such an embossed portion 4 is formed, the position of a point indicated by T in the drawing substantially corresponds to the position of the apex of the convex portion. When the embossed portion 4 shown in FIG. 2A is formed, the longitudinal dimension is preferably 0.5 to 3 mm, particularly preferably 1 to 2 mm, and the width dimension is 2 to 10 mm, particularly 3 It is preferably ˜6 mm.

  Instead of the embossed portion 4 shown in FIG. 2A, an embossed portion shown in FIG. 2B can be adopted. The embossed portion shown in FIG. 2B includes an embossed portion 4 a having a “H” shape and an embossed portion 4 b having an inverted “H” shape. These two types of embossed portions 4a and 4b are alternately arranged along the extending direction of the fiber sheet to form a row, and the rows are arranged in multiple rows. Each embossed part 4a, 4b is formed so as to be inclined at a predetermined angle with respect to the extending direction of the fiber sheet. This inclination angle is preferably in the range of ± 45 degrees to ± 5 degrees, particularly in the range of ± 40 degrees to ± 20 degrees with respect to the horizontal direction (direction orthogonal to the extending direction of the fiber sheet). When such an embossed portion 4 is formed, the position of a point indicated by T in the figure, that is, the central portion of the closed region surrounded by the four embossed portions 4 is approximately at the position of the apex of the convex portion. Equivalent to. The dimension of the embossed portion 4 shown in FIG. 2B can be the same as that shown in FIG.

  Instead of the embossed portion 4 shown in FIGS. 2 (a) and 2 (b), an embossed portion shown in FIG. 2 (c) may be employed. The embossed portion 4 shown in FIG. 2 (c) is composed of a convex arcuate embossed portion 4c with a curved string portion, and a convexly bowed embossed portion 4d with a curved string portion. The longitudinal direction of each embossed part 4c, 4d is substantially orthogonal to the extending direction of the fiber sheet. One embossed portion 4c and one embossed portion 4d are arranged adjacent to each other so that the respective string portions face each other, and form an embossed group 4e in which the outline of the outer edge is substantially circular. Yes. The embossed groups 4e are arranged in a staggered pattern.

  Instead of the above embossed portions, the embossed portions shown in FIG. The embossed portion 4 shown in FIG. 2 (d) has a rectangular shape having a longitudinal direction and a width direction, and is formed so that the longitudinal direction is inclined at a predetermined angle with respect to the extending direction of the fiber sheet. Yes. This inclination angle is more preferably in the range of ± 45 ° to ± 5 °, particularly in the range of ± 40 ° to ± 20 ° with respect to the horizontal direction (direction perpendicular to the extending direction of the fiber sheet). The embossed portions 4 that are inclined are arranged so as to form a line in the angle direction of the inclination. This row consists of a row that rises to the right and a row that rises to the left with respect to the extending direction of the fiber sheet. The row that rises to the right and the row that rises to the left are symmetrical with respect to the extending direction of the fiber sheet, and the embossed portion is at the intersection of the row that rises to the right and the row that rises to the left 4 does not exist. When such an embossed portion 4 is formed, the position of a point indicated by T in the figure, that is, the central portion of the closed rhombus region surrounded by the embossed portion 4 substantially corresponds to the position of the apex of the convex portion. To do. The dimension of the embossed portion 4 shown in FIG. 2D can be the same as that shown in FIG.

Even if any embossed part of Fig.2 (a)-FIG.2 (d) is employ | adopted, the ratio of the sum total of the area of the embossed part 4 is 5 to 50% with respect to the area of the surface sheet 1, especially. It is preferable that it is 10 to 30% from the point of the effective formation of uneven | corrugated shape and the penetration | invasion in the convex part 7 of the constituent fiber of the fiber sheet 3. For the same reason, the area of the embossed portion per is preferably 0.5 to 15 mm ^2, in particular 2 to 8 mm ^2.

There is no particular relationship between the formation position of the embossed portion 4 and the position of the opening portion 5 in the perforated plastic sheet 2, and the embossed portion 4 can be formed regardless of the position of the opening portion 5. As for the number of the embossed portions 4 and the number of the aperture portions 5, the density of the aperture portions 5 (that is, the number of the aperture portions 5 per unit area) is larger than the density of the embossed portions 4. It is preferable from the viewpoint of sufficient permeation of the liquid through the opening 5. It is preferable that 10 to 200, particularly 30 to 100, apertures 5 are formed per 1 cm ² . It is preferable that the area of the perforated part 5 is 0.1 to 15 mm ² , particularly 0.5 to 5 mm ² .

  As shown in FIG. 1, in the topsheet 1, some of the constituent fibers of the lower fiber sheet 3 are exposed to the surface of the topsheet 1 through the apertures 5 of the perforated plastic sheet 2 that is the upper layer. ing. With such a configuration, the capillary force acts more greatly in the opening 5 and the drawing and permeation of the liquid through the opening 5 is further promoted. A method for manufacturing the topsheet 1 having such a configuration will be described later.

As the perforated plastic sheet 2 constituting the top sheet 1, the same one as conventionally used in the field of absorbent articles can be used. As a constituent material of the perforated plastic sheet 2, a synthetic resin exhibiting thermoplasticity is preferably used. As such a synthetic resin, for example, an olefin resin such as polyethylene or polypropylene, a polyester resin such as polyethylene terephthalate, a polyamide resin, an ethylene-vinyl acetate copolymer (EVA), or the like can be used. The opening 5 in the perforated plastic sheet 2 may be planar, or may be three-dimensional such as a cylinder or a funnel. The perforated plastic sheet 2 preferably has a basis weight of 5 to 50 g / m ² , particularly 15 to 35 g / m ² from the viewpoint of the balance between flexibility and strength.

  Of the surface of the perforated plastic sheet 2, the skin facing surface of the wearer may be covered with fibers. As a result, the feeling of sticking to the skin peculiar to the plastic sheet can be reduced, and the wearing feeling of the absorbent article can be enhanced. In order to cover the skin facing surface with fibers, for example, a low basis weight nonwoven fabric may be bonded to the surface.

As the fiber sheet 3 arranged on the lower side of the perforated plastic sheet 2, a web or a nonwoven fabric made of short fibers or long fibers is used. Particularly preferably used materials are card webs and air-through nonwoven fabrics. This is because these are bulky and the constituent fibers easily enter the convex portion 7. The fiber sheet 3 preferably has a basis weight of 15 to 100 g / m ² , particularly 30 to 60 g / m ² from the viewpoint of the balance between flexibility and strength.

  As the fiber constituting the fiber sheet 3, a synthetic resin exhibiting thermoplasticity is preferably used. Examples of such synthetic resins include olefin resins such as polyethylene and polypropylene, polyester resins such as polyethylene terephthalate, polyamide resins, and acrylic resins. These fibers may be composed of a single component of these resins, or may be a composite fiber composed of a two-component resin. Particularly preferred fibers are stretchable fibers. By using a stretchable fiber, the formability of the convex portion after the stretched state of the fiber sheet 3 in the stretched state is released can be enhanced. As the stretchable fiber, a fiber having a rubber elasticity, such as a two-dimensional crimped or three-dimensional crimped fiber, or a polyurethane elastomer or a polyester elastomer can be used. The fiber sheet 3 may be composed of 100% stretchable fiber or may be composed of 25 to 75% by weight of non-stretchable fiber. Although there is no restriction | limiting in particular in the thickness of the fiber which comprises the fiber sheet 3, From the point of the softness | flexibility and capillary force of the fiber sheet 3, it is preferable that it is 1-10 dtex, especially 2-6 dtex.

The surface sheet 1 composed of these sheets 2 and 3 preferably has a basis weight of 20 to 150 g / m ² , particularly 45 to 95 g / m ² from the viewpoint of the balance between flexibility and strength. Since the surface sheet 1 has a large number of irregularities 6 and 7, the sheet 1 is large and bulky. Specifically, the thickness of the topsheet 1 is 1 to 6 mm, particularly 2 to 4 mm, which is bulky in the basis weight range.

  The top sheet 1 is incorporated into an absorbent article such that the side of the perforated plastic sheet 2 faces the wearer's skin and the side of the fiber sheet 3 faces the absorber. In this case, the fiber sheet 3 may be incorporated so as to be in direct contact with the absorbent body, or the absorbent sheet is placed such that the side of the fiber sheet 3 faces the absorbent body through another sheet called a second sheet or a sublayer sheet. May be incorporated. Examples of the absorbent article include sanitary napkins, disposable diapers, incontinence pads, cage sheets, panty liners, and the like.

  When incorporating the topsheet 1 into the absorbent body, the entire upper surface of the absorbent body may be covered with the topsheet 1. Alternatively, the top sheet 1 is arranged to extend in the longitudinal direction of the absorber in a part of the upper surface of the absorber, for example, the central region in the width direction of the absorber, and other sheets are arranged in the left and right side regions. May be. Instead of this, the top sheet 1 may be arranged in the longitudinal center region of the absorber so as to extend in the width direction of the absorber, and another sheet may be arranged in the front and rear regions. As the other sheet, for example, a sheet different from the top sheet 1 can be used. Alternatively, only the perforated plastic sheet 2 or the fiber sheet 3 constituting the surface sheet 1 is extended from the left and right side edges or the front and rear end edges of the surface sheet 1 in the lateral direction or the front and rear direction, and the extending part is separated. It can also be used as a sheet of material. From the viewpoint of ease of production and economy, it is preferable to use a perforated plastic sheet 2 extending laterally or longitudinally from the left and right side edges or front and rear edges of the topsheet 1 as the separate sheet. .

  Next, the preferable manufacturing method of the surface sheet 1 of this embodiment is demonstrated, referring FIG. FIG. 3 shows a schematic view of an apparatus 10 used for manufacturing the topsheet 1. The manufacturing apparatus 10 illustrated in FIG. 3 includes a feeding unit 20, a joining unit 30, and an air blowing unit 40. The feed-out part 20 is a part that feeds these sheets from the original fabrics of the perforated plastic sheet 2 and the fiber sheet 3. The joining portion 30 is a portion where the sheets 2 and 3 are overlapped and embossed to be joined and integrated. The air spraying part 40 is a part which sprays air by the penetration system to the surface sheet 1 obtained by joining and integrating.

  First, the perforated plastic sheet 2 and the fiber sheet 3 are fed out from the raw fabrics 22 and 23, respectively. Among the fed sheets 2 and 3, the fiber sheet 3 is tensioned in the longitudinal direction of the sheet during the conveying process. The fiber sheet 3 is stretched in the longitudinal direction by this tension. It is preferable that the extension direction is the flow direction (MD) of the fiber sheet 3 from the viewpoint of increasing the extension rate. The degree of elongation is preferably within the limit where the fiber sheet 3 is elastically deformed. This degree varies depending on the material of the fiber sheet 3, but can be generally 5 to 40%, particularly 10 to 30%.

  Both sheets 2, 3 conveyed from the feeding unit 20 are overlapped at the joining unit 30. At the time of superposition, the stretched state of the fiber sheet 3 is maintained and the superposed plastic sheet 2 is superposed in the stretched state. Under this condition, both sheets 2 and 3 are sent to the embossing device 31. The embossing device 31 includes a pair of rolls 32 and 33. Of the two rolls 32 and 33, the roll 32 facing the perforated plastic sheet 2 is an engraving roll having irregularities formed on the peripheral surface, and the roll 33 facing the fiber sheet 3 is a smooth roll. Both rolls 32 and 33 can be heated to a predetermined temperature.

  By embossing by the embossing device 31, both sheets 2 and 3 are joined and integrated. In this case, since the perforated plastic sheet 2 faces the engraving roll 32, embossing is performed from the perforated plastic sheet 2 side. As a result, the embossed portion 4 is formed from the perforated plastic sheet 2 side, and the embossed portion 4 is recessed. Further, depending on the elevation relationship between the heating temperature of the rolls 32 and 33 and the melting point or softening point of the fibers constituting the fiber sheet 3, the fiber sheet 3 in the embossed portion 4 is melted and solidified to become a film-like or pressure bonded. Will only be done.

  The fiber sheet 3 is joined to the perforated plastic sheet 2 in its extended state. As a result, when the stretched state is released after joining, residual strain occurs in the fiber sheet 3. The residual distortion is generated in a portion between the embossed portions 4, and the fiber sheet 3 in that portion is relatively raised as seen from the embossed portion. Thereby, a large number of irregularities are formed in the fiber sheet 3. At the time of forming the uneven portions, the perforated plastic sheet 2 is also deformed as the fiber sheet 3 is deformed, and a large number of uneven portions are also formed on the plastic sheet 2. The formation position of the uneven portion coincides with the formation position of the uneven portion formed on the fiber sheet 3. As a result, a part of the fiber sheet 3 enters the convex portion formed by the perforated plastic sheet 2. In this way, a large number of concavo-convex portions are formed as the entire surface sheet 1. Release of the fiber sheet 3 in the stretched state can be performed before or after air blowing in the air blowing unit 40 described later.

  The residual strain increases particularly around the embossed portion 4. As a result, the aperture 5 existing around the embossed portion 4 is extended by residual strain, and the aperture area is increased. Since the embossed portion 4 is formed at a position corresponding to the concave portion 6 in the top sheet 1, the increase in the area of the hole portion 5 existing in the concave portion 6 means that the liquid permeates through the hole portion 5. It is preferable from the viewpoint of promotion.

  In order to deform the perforated plastic sheet 2 with the deformation of the fiber sheet 3 to form a concavo-convex portion in the plastic sheet 2 and to allow a part of the fiber sheet 3 to enter the convex portion, the perforated plastic sheet 2 It is preferable that no tension is applied to the material and it is not substantially in an extended state. However, in practice, since a certain amount of tension needs to be applied to the perforated plastic sheet 2 in order to convey the perforated plastic sheet 2, the perforated plastic sheet 2 is stretched to some extent. Therefore, in the superposition of the perforated plastic sheet 2 and the fiber sheet 3, it is preferable that the degree of elongation of the perforated plastic sheet 2 is as low as possible than the degree of elongation of the fiber sheet 3.

  For the purpose of forming a large number of concave and convex portions 6 and 7, the fiber sheet 3 before being joined to the perforated plastic sheet 2 is preliminarily embossed only in the fiber sheet 3 in a state where the fiber sheet 3 is extended in at least one direction. It is advantageous (this extension is called primary extension). By this embossing, the strain in the stretched state is fixed, and then the stretched state is released, whereby a concavo-convex portion is formed in advance on the fiber sheet 3 (this concavo-convex portion is referred to as a primary concavo-convex portion). The shape and arrangement pattern of the embossed portion for forming the primary uneven portion can be the same as described with reference to FIG.

  While maintaining the primary extension state of the fiber sheet 3 on which the primary irregularities are formed, or once releasing the primary extension state, the fiber sheet 3 is stretched again, and the fiber sheet 3 is superposed on the perforated plastic sheet 2 under the extension state, By performing the joining and integration described above, and then releasing the stretched state, a new uneven portion is formed in addition to the primary uneven portion. In the surface sheet 1 obtained in this way, the number of the uneven portions is increased and the uneven portions are randomly arranged as compared with the case where the primary uneven portion is not formed.

  After the sheets 2 and 3 are joined and integrated in this way to form the top sheet 1, the sheet 1 is introduced into the air blowing unit 40. In this case, the top sheet 1 may be introduced into the air blowing unit 40 after releasing the extended state, or may be introduced into the air blowing unit 40 before releasing the extended state. In the air blowing part 40, a ventilation process is performed from the fiber sheet 3 side toward the perforated plastic sheet 2 side. The purpose is to expose a part of the constituent fibers of the fiber sheet 3 to the surface of the sheet 1 through the apertures 5 of the perforated plastic sheet 2. Therefore, the supply amount and supply speed of the air are adjusted so that a part of the constituent fibers of the fiber sheet 3 is successfully exposed to the surface of the sheet 1 through the apertures 5 of the perforated plastic sheet 2.

  When hot air is used as the air used for the ventilation process, the bulk of the fiber sheet 3 reduced in volume by the embossing device 31 can be recovered, and an additional effect that a bulky surface sheet 1 can be obtained occurs. From this point of view, the temperature of the hot air when using hot air is less than the melting point of the constituent fibers of the fiber sheet 3 and has a melting point of −50 ° C. or higher, particularly a melting point of −50 ° C. or higher and a melting point of −3 ° C. or lower. It is preferable from the viewpoint of effective bulk recovery. A short time for blowing hot air is sufficient. Specifically, the bulk of the fiber sheet 3 is recovered in a short time of about 0.05 to 3 seconds, particularly about 0.05 to 1 second.

  You may fix the bulk of the fiber sheet 3 which recovered | restored by blowing cold air to the surface sheet 1 which passed the air spraying part 40 as needed.

  The present invention is not limited to the embodiment. For example, the surface sheet 1 of the present embodiment has a two-layer structure of the perforated plastic sheet 2 and the fiber sheet 3, but three or more layers are formed by stacking another sheet of one or more layers below the fiber sheet 3. The structure may be as follows.

  Moreover, in the said embodiment, although the embossing apparatus 31 was used for joining of the perforated plastic sheet 2 and the fiber sheet 3, it can replace with this and an ultrasonic embossing apparatus can also be used. Further, the perforated plastic sheet 2 and the fiber sheet 3 may be joined together by using embossing and adhesion by an adhesive.

  Moreover, in the said embodiment, although the fiber sheet 3 was extended only in one direction (uniaxial direction), it may replace with this and may be extended in a biaxial direction.

  Moreover, in the said embodiment, although the operation which exposes the structural fiber of the fiber sheet 3 from the aperture part 5, and the bulk recovery of the fiber sheet 3 were performed simultaneously by the ventilation process in the air spraying part 40, these operations were performed. It may be done separately. For example, for the purpose of performing the bulk recovery of the fiber sheet 3 first using hot air, and then performing the operation of fixing the recovered bulk and exposing the constituent fibers of the fiber sheet 3 from the aperture 5, May be performed.

  Moreover, the shape and arrangement pattern of the embossed portion 4 are not limited to those shown in FIG. 2, and for example, those shown in FIGS. 1, 5, 6, and 7B of Japanese Patent Laid-Open No. 2002-160293 can be used. .

It is sectional drawing which shows one Embodiment of the surface sheet of this invention. It is a figure which shows the shape and arrangement | positioning pattern of an embossing part. It is the schematic which shows the apparatus for manufacturing the surface sheet shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Surface sheet 2 Perforated plastic sheet 3 Fiber sheet 4 Embossed part 5 Opening part 6 Concave part 7 Convex part

Claims (4)

A surface sheet of an absorbent article comprising a perforated plastic sheet facing the wearer's skin side and a fiber sheet facing the absorber side,
Both sheets are joined by crimping with embossment, with the fiber sheet extended in at least one direction,
The embossed portion formed by embossing has a shape having a longitudinal direction and a width direction, and is formed so that the longitudinal direction intersects the extending direction of the fiber sheet,
A surface sheet of an absorbent article in which a perforated plastic sheet is recessed in the embossed portion, a large number of recessed portions are formed in the surface sheet, and the recessed portion is formed as a protruding portion, and a part of the fiber sheet enters the protruding portion. A manufacturing method of
Under the condition that the fiber sheet extended in at least one direction is overlapped with the perforated plastic sheet, both sheets are joined and integrated by pressure bonding with embossing,
The fiber sheet is contracted by releasing the stretched state of the fiber sheet to form a large number of uneven portions, and the porous plastic sheet is deformed to form a large number of uneven portions as the fiber sheet contracts, Including a step of inserting a part of the fiber sheet into a convex portion formed in the perforated plastic sheet,
By embossing only the fiber sheet in a state where the fiber sheet is stretched in at least one direction, the strain in the stretched state is fixed,
Next, while maintaining the stretched state of the fiber sheet, or once releasing the stretched state, the fiber sheet is stretched again, and the fiber sheet is overlapped with the plastic sheet, and both sheets are crimped by embossing. method for producing a top sheet of the intake Osamusei article you integrally joined in. Ventilation treatment is performed from the fiber sheet side toward the plastic sheet side after joining and integrating the two sheets and before releasing the fiber sheet in its extended state and / or after releasing the fiber sheet in its extended state. The manufacturing method of the surface sheet of the absorbent article of Claim 1 . The manufacturing method of the surface sheet of the absorbent article of Claim 2 which performs the said ventilation process using a hot air. A surface sheet of an absorbent article comprising a perforated plastic sheet facing the wearer's skin side and a fiber sheet facing the absorber side,
Both sheets are joined by crimping with embossment, with the fiber sheet extended in at least one direction,
The embossed portion formed by embossing has a shape having a longitudinal direction and a width direction, and is formed so that the longitudinal direction intersects the extending direction of the fiber sheet,
A surface sheet of an absorbent article in which a perforated plastic sheet is recessed in the embossed portion, a large number of recessed portions are formed in the surface sheet, and the recessed portion is formed as a protruding portion, and a part of the fiber sheet enters the protruding portion. A manufacturing method of
Under the condition that the fiber sheet extended in at least one direction is overlapped with the perforated plastic sheet, both sheets are joined and integrated by pressure bonding with embossing,
The fiber sheet is contracted by releasing the stretched state of the fiber sheet to form a large number of uneven portions, and the porous plastic sheet is deformed to form a large number of uneven portions as the fiber sheet contracts, Including a step of inserting a part of the fiber sheet into a convex portion formed in the perforated plastic sheet,
In addition to the fiber sheet, the plastic sheet is also stretched, and the two sheets are overlapped and joined and integrated. In the overlap, the extent of the plastic sheet is lower than the extent of the fiber sheet. method for producing a top sheet of the intake Osamusei article you.

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