JP4233435B2 - Composite sheet - Google Patents

Description

  The present invention relates to a composite sheet in which a continuous filament layer and a short fiber layer are joined and integrated. The composite sheet of the present invention is particularly preferably used as a surface sheet or a cleaning sheet of an absorbent article. Moreover, this invention relates to the absorbent article provided with the said composite sheet.

  As a composite sheet using continuous filaments, an upper layer, which is a bundle of continuous filaments, is layered on a lower layer, which is a bundle of continuous filaments, and both layers are partially fused with curved or linear joining lines Is known (see Patent Document 1). According to this patent document, this composite sheet is supposed to be used as a surface sheet of an absorbent article. However, since the continuous filament constituting the upper layer facing the skin is oriented in one direction, the liquid excreted from the wearer of the absorbent article is easily guided in the orientation direction of the continuous filament constituting the upper layer, and the lower layer It is difficult for the liquid to be transferred to the surface, so that a surface liquid flow that leads to leakage tends to occur.

  Other composite sheets using continuous filaments are also known (see Patent Documents 2 and 3). However, the continuous filaments in these composite sheets constitute a spunbonded nonwoven fabric and are not oriented in one direction. Therefore, when these composite sheets are used as the surface sheet of the absorbent article, it is not easy to control the diffusion of the liquid in the plane of the sheet in a specific direction. Moreover, when used as a cleaning sheet, the spunbonded nonwoven fabric has a smooth surface and is therefore inferior in dust collection.

JP 2002-65738 A JP-A-7-207567 Japanese Patent Laid-Open No. 9-31821

  Accordingly, an object of the present invention is to provide a composite sheet that can eliminate the above-described disadvantages of the composite sheet of the prior art.

  The present invention has a first layer composed of short fibers and a second layer composed of stretchable continuous filaments oriented in one direction, and both layers are partially joined at a large number of joints. By providing a composite sheet that is integrated in the vertical direction, the first layer protrudes between the joints to form a plurality of convex portions, and has stretchability in the orientation direction of the continuous filament. The object has been achieved.

In addition, the present invention provides a preferable method for producing the composite sheet,
The continuous filament web is superposed on one surface of the continuous filament oriented in one direction, the two are partially joined and integrated in the thickness direction, and at the same time or after the integration, the continuous filament. The method for producing a composite sheet according to claim 1, wherein the plurality of convex portions are formed by heat shrinking.

Furthermore, the present invention relates to an absorbent article having a liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-retaining absorbent disposed between both sheets.
Using the composite sheet as the surface sheet, the composite sheet is arranged such that the first layer is directed to the wearer's skin side, and the second layer is disposed on the absorber side,
The present invention provides an absorbent article in which the composite sheet is arranged so that the orientation direction of the continuous filaments coincides with the longitudinal direction of the absorbent article.

  When the composite sheet of the present invention is used as, for example, a surface sheet of an absorbent article, the liquid is easily diffused in the orientation direction of the continuous filament, so that the diffusion of the liquid in the direction orthogonal to the orientation direction is suppressed. It has the advantage that leakage is effectively prevented. Moreover, the composite sheet of this invention becomes favorable [the fit property to the skin of an absorptive article and a feeling of mounting | wearing] with the stretchability to the orientation direction of a continuous filament. In addition, when the composite sheet of the present invention is used as a cleaning sheet, it is excellent in dirt scraping and dust collection, in addition to hand and cleaning tools and operability, and in compliance with the surface to be cleaned. Is also good and has excellent cleaning properties.

  The present invention will be described below based on preferred embodiments with reference to the drawings. The present embodiment is an example in which the composite sheet of the present invention is used as a surface sheet of an absorbent article. FIG. 1 is a cross-sectional view of the napkin showing a state in which the composite sheet of the present invention is incorporated in a sanitary napkin as an example of an absorbent article. In FIG. 1, the direction indicated by X indicates the orientation direction of the continuous filament. That is, FIG. 1 is a cross-sectional view along the longitudinal direction of the composite sheet along the orientation direction of the continuous filament and the napkin provided with the composite sheet.

  The sanitary napkin 20 has a vertically long shape, and the composite sheet 10 is disposed on the skin facing side of the wearer. That is, the composite sheet 10 is used as a top sheet in the sanitary napkin 20. In addition to the composite sheet as the top sheet, the napkin 20 has a liquid-impermeable back sheet 21 and a liquid-retaining absorbent 22 interposed between the two sheets. As the back sheet 21 and the absorbent body 22, a material usually used for this type of article can be used.

  The composite sheet 10 of this embodiment includes a first fiber layer 1 and a second fiber layer 2 adjacent thereto. The first fiber layer 1 is composed of an aggregate of short fibers. On the other hand, the second fiber layer 2 is composed of continuous filaments 5 oriented in the X direction. Both short fibers and continuous filaments are hydrophilized. The continuous filament 5 is continuous in the X direction of the sheet 10 without interruption. The X direction is also the machine direction when the composite sheet 10 is manufactured. The first fiber layer 1 and the second fiber layer 2 are partially bonded by a large number of bonding portions 3. In other words, the first fiber layer 1 and the second fiber layer 2 are not joined on the entire surface.

  The joint portion 3 is formed by heat-sealing the first fiber layer 1 and the second fiber layer 2. The joint portion 3 is consolidated, and has a smaller thickness and a higher density than other portions of the sheet 10. The joint portion 3 has a shape extending in a direction intersecting with the orientation direction of the continuous filament 5. Specifically, the joint portion 3 is a small ellipse, and the major axis direction thereof is in a direction orthogonal to the orientation direction of the continuous filament 5. The continuous filament 5 is joined by the joint portion 3 at any part in its length direction. Thereby, the integrity of the second fiber layer 2 as a layer is maintained.

  The joint portions 3 are formed discretely and discontinuously in the elliptical major axis direction, and form a staggered arrangement pattern as a whole. In addition, the junction part 3 can also be made into the curve and linear shape extended continuously in the direction which cross | intersects the orientation direction of a continuous filament. However, it is preferable to form the joints 3 discretely and discontinuously because the composite sheet 10 can be made flexible. Further, it is preferable because the preferential diffusion of the liquid in the orientation direction of the continuous filament 5 (which will be described later) is hardly inhibited. However, if the joint portion 3 is formed too discretely or discontinuously, the strength of the composite sheet 10 decreases. Therefore, the ratio of the sum of the area of the joint 3 to the shape of the joint 3 and the area of the sheet 10 is determined in consideration of the balance between flexibility and strength of the sheet 10.

  In the sheet 10, the first fiber layer 1 protrudes between the joint portions 3 to form a large number of convex portions 4. In the present embodiment, the sheet 10 has a large number of closed regions formed by being surrounded by the joint portions 3 having a staggered array pattern, and the first fiber layer 1 is formed in the closed regions. As shown in FIG. 1, it protrudes to form a convex portion 4. The convex part 4 in the present embodiment has a dome shape. The inside is filled with the short fibers constituting the first fiber layer 1. The joint portion 3 is a concave portion relative to the convex portion 4. On the other hand, in the 2nd fiber layer 2, between the junction parts 3, the substantially flat surface is maintained, or it protrudes a little (refer FIG. 1). When viewed as a composite sheet 10 as a whole, the second fiber layer 2 side is flat or slightly protruding, and has a structure having a large number of irregularities on the first fiber layer 1 side. Due to this uneven portion, it is possible to prevent the occurrence of discomfort, stuffiness, and blurring on the skin while the napkin 20 is being worn.

The composite sheet 10 having a large number of convex portions 4 has a low-density bulky structure, and has a sufficiently large compressive deformability when compressed in the thickness direction. More specifically, the sheet 10 has an apparent density under a pressure of 0.49 cN / cm ² of 0.005 to 0.05 g / cm ³ , particularly 0.01 to 0.04 g / cm ^3. It is preferable from the standpoint of imparting a bulky feeling and enhancing compressive deformability, and hence flexibility. Furthermore, it is sufficient for the sheet 10 that the apparent density under the pressure of 49.0 cN / cm ² is 0.01 to 0.3 g / cm ³ , particularly 0.03 to 0.2 g / cm ^3. This is preferable from the viewpoint that strength is imparted and the shape retaining property of a convex three-dimensional solid shape is enhanced. The pressure of 49.0 cN / cm ² is an apparent density when it is assumed that body pressure is applied while the napkin is being worn.

  Next, details of the layers 1 and 2 will be described. The continuous filament 5 constituting the second fiber layer 2 has elasticity. Since the continuous filament 5 has stretchability, the composite sheet 10 has stretchability in the orientation direction of the continuous filament 5, that is, the X direction in FIG. Examples of the continuous filament having stretchability include elastic fibers that exhibit stretchability, and fibers that exhibit stretchability by having a specific three-dimensional structure such as a three-dimensional crimped shape.

  Examples of elastic fibers whose material itself exhibits elasticity include fibers obtained by eluting and spinning elastomer materials such as synthetic rubber such as styrene-butadiene, butadiene, isoprene, and neoprene, natural rubber, and polyurethane represented by spandex. And synthetic fibers composed of polyester and the like.

  The three-dimensional crimped shape (three-dimensional crimped shape) indicates a spiral or spiral three-dimensionally deformed crimped state, and can generally be obtained with fibers having an eccentric structure or the like. In particular, from the viewpoint of increasing the stretch recovery property of the second fiber layer 2, the three-dimensionally crimped fiber is preferably composed of a latent crimpable fiber in which crimps are expressed. The latent crimpable fiber preferably has a fineness of about 1 to 7 dtex. The latent crimpable fiber includes, for example, an eccentric core-sheath type composite fiber or a side-by-side type composite fiber containing two types of thermoplastic polymer materials having different shrinkage rates as components. Examples thereof include those described in JP-A-9-296325 and JP2759331A. As an example of two types of thermoplastic polymer materials having different shrinkage rates, for example, a combination of an ethylene-propylene random copolymer (EP) and polypropylene (PP) is preferable in terms of the softness of the composite sheet 10. The latent crimpable fiber is one that crimps by heat and shrinks. That is, the latent crimpable fiber is a kind of heat-shrinkable fiber. Therefore, the latent crimpable fiber in which crimps are expressed is a form of heat-shrinkable fiber that has been heat-shrinked. In addition, you may give a crimp by carrying out a mechanical crimping process etc. to the elastic fiber in which raw material itself shows a stretching property.

  The continuous filaments constituting the second fiber layer 2 may all be stretchable fibers or may contain other continuous filaments. In particular, when the continuous filament constituting the second fiber layer 2 includes a three-dimensionally crimped fiber, the continuous filament extends spirally in the orientation direction, and the resulting composite sheet has stretchability in the orientation direction and thickness direction. It is preferable because of the flexibility. In addition, if the continuous filaments constituting the second fiber layer 2 contain latent crimped fibers in which crimps are expressed, in addition to this, stretch recovery in the orientation direction is enhanced, and irregularities are formed on the composite sheet 10. Is more preferable because it becomes easy. Examples of the other continuous filament include a continuous filament that does not substantially heat shrink at the crimp start temperature of the latent crimpable fiber. Specifically, there are continuous filaments that have heat shrinkage but do not substantially heat shrink at the crimp start temperature of the latent crimpable fiber, and continuous filaments that do not substantially have heat shrinkability. In particular, it is preferable that a heat-fusible continuous filament is included from the viewpoint of improving the strength of the second fiber layer 2. When the second fiber layer 2 includes continuous filaments other than the crimped continuous filament, the amount of crimped continuous filaments is 50% by weight or more, particularly 70 to 90% by weight, based on the weight of the second fiber layer 2. It is preferable that

The second fibrous layer 2 a basis weight of 15 to 50 g / m ^2, to be particularly 25~40g / m ^2, has a shrinkage sufficient to provide sufficient uplift to the first fibrous layer 1 and a liquid From the point that the amount of fiber is difficult to hold.

  Unlike the second fiber layer 2, the fibers constituting the first fiber layer 1 are short fibers. The fiber length is preferably about 20 to 70 mm from the viewpoint of fiber opening property when the card method is used and the fiber conveyance property when the airlaid method is used. Short fibers include single fibers made of materials such as polypropylene (PP), polyethylene terephthalate (PET), and polylactic acid (PLA), materials such as polyethylene (PE), PP, PET, and ethylene-propylene copolymer (EP). A core-sheath type composite fiber or a side-by-side type composite fiber made of can be used. Furthermore, natural fibers such as rayon and cotton can be used.

  Similar to the second fiber layer 2, the first fiber layer 1 may also contain crimped fibers, in particular three-dimensional crimped fibers. As the three-dimensional crimped fiber contained in the first fiber layer 1, a latent crimpable fiber or the like in which crimp is developed is preferably used. The latent crimpable fiber may be the same type or different type of latent crimpable fiber contained in the second fiber layer 2 except that the fiber length is different. For details of the latent crimpable fibers contained in the first fiber layer 1, the explanation regarding the latent crimpable fibers contained in the second fiber layer 2 is applied as appropriate.

  As described above, since the convex portion 4 is composed of the first fiber layer 1, the fact that the first fiber layer 1 includes a three-dimensional crimped fiber means that the convex portion 4 includes a three-dimensional crimped fiber. Means that When the convex part 4 contains the three-dimensional crimped fiber, the recoverability when the convex part 4 is compressed becomes high. Moreover, the sag of the convex part 4 when a liquid is excreted to the sheet | seat 10 becomes small. In addition, the first fiber layer 1 is highly recoverable when it is stretched in the plane direction.

  The 1st fiber layer 1 may be comprised from 100% of crimped fiber, and may contain the other fiber. Examples of the other fibers include the same fibers as the other fibers included in the second fiber layer 2. In particular, it is preferable that a heat-fusible fiber is included. As a result, the surface strength of the convex portion 4 is increased and fuzzing is effectively prevented. When the first fiber layer 1 includes fibers other than the crimped fibers, the amount of the crimped fibers is 30% by weight or more, particularly 50 to 90% by weight with respect to the weight of the first fiber layer 1. Is preferred.

  As described above, the first fiber layer 1 is formed by a card method or an airlaid method. Among these methods, when it is desired to increase the surface strength of the first fiber layer 1, a card method, which is a method for easily increasing the degree of fiber entanglement, is preferably used. When it is desired to reduce the apparent density of the first fiber layer 1, the airlaid method is preferably used.

Since the first fiber layer 1 has a basis weight of 15 to 50 g / m ² , particularly 25 to 35 g / m ² , since the sufficient convex portion 4 is formed on the first fiber layer 1, the touch of the layer It is preferable from the point that the smoothness becomes good.

  As described above, since both the first fiber layer 1 and the second fiber layer 2 preferably contain crimped fibers, both of these layers have high recoverability when stretched in the plane direction. It will be a thing. In particular, since the continuous filaments constituting the second fiber layer 2 are oriented in one direction, the sheet 10 as a whole has high stretchability in the orientation direction. Therefore, the napkin 20 including the sheet 10 has good followability to the wearer's movement, improves the fit of the absorbent article, and effectively prevents liquid leakage.

  In FIG. 1, the direction indicated by X is also the longitudinal direction of the napkin 20. That is, the composite sheet 10 is arranged so that the orientation direction of the continuous filament 5 coincides with the longitudinal direction of the napkin 20. As a result, the liquid excreted in the composite sheet 10 has priority over its orientation direction, that is, the longitudinal direction of the napkin 20 in the second fiber layer 2 composed of continuous filaments 5 after passing through the first fiber layer 1 in the composite sheet 10. Is diffused. As a result, the diffusion of the liquid in the width direction of the napkin 20 is suppressed, and so-called side leakage is suitably prevented. Such a method of arranging the composite sheet 10 is based on the knowledge that it is effective to control the diffusion of the liquid by a layer closer to the absorber in the top sheet. In addition, like the surface sheet described in JP 2002-65738 A described in the background art section, it is possible to arrange a continuous filament layer oriented in one direction on the skin facing side of the surface sheet. In that case, the liquid tends to flow through the surface of the surface sheet in the orientation direction of the continuous filament, rather than the liquid permeating into the surface sheet. That is, a so-called surface liquid flow is generated, and liquid leakage easily occurs from the front-rear direction of the napkin.

In the present embodiment, the fiber density of the second fiber layer 2 is preferably higher than that of the first fiber layer in order to more effectively cause the liquid diffusion by the second fiber layer 2. Specifically, the fiber density of the second fiber layer 2, that is, the apparent density of the second fiber layer 2, is 0.05 to 0.5 g / cm ³ , particularly 0.1 to 0.3 g / cm ^3. Preferably, that of the first fiber layer 1 is 10 to 80%, particularly 30 to 60% of the second fiber layer 2.

  Since the continuous filaments 5 constituting the second fiber layer 2 are oriented in one direction, the flexibility of the composite sheet 10 in the direction orthogonal to the orientation direction is increased, that is, the composite when the orientation direction is the bending axis. There is also an advantage that the bending rigidity of the sheet 10 is lowered. As a result, the napkin 20 provided with the composite sheet 10 has a high fit and a good wearing feeling.

  In the composite sheet 10, it is preferable that mechanical strength such as tensile strength in the machine direction and the width direction is balanced. By the way, since the continuous filaments 5 constituting the second fiber layer 2 in the composite sheet 10 of the present embodiment are oriented in the machine direction, the composite sheet 10 has higher tensile strength in the machine direction than in the width direction. Tend to. Therefore, in order to balance the tensile strength in the machine direction and the width direction, the first fiber layer 1 has a tensile strength in the width direction of 1.5 times or more, particularly 1.5 to 3 in the machine direction. It is preferably 0.0 times, particularly 1.7 to 2.5. In order to make the tensile strength in the machine direction and the width direction in the first fiber layer 1 have such a relationship, for example, (b) the fiber orientation of the first fiber layer 1 is made uniform. The basis weight of the second fiber layer 2 is 1.2 times or more. (C) When the two joint portions 3 adjacent to each other in the oblique direction are viewed from the longitudinal direction of the sheet 10, overlapping portions are generated. For example, a means such as disposing the joint 3 may be used.

  Next, the preferable manufacturing method of the composite sheet 10 shown in FIG. 1 is demonstrated. First, tow, which is a continuous filament converging body, is spread apart so as to have a uniform bulk in the width direction to form a continuous filament layer oriented in one direction. Apart from this, short fibers are opened using a card method, an airlaid method or the like to form a random web. A random web of short fibers is superposed on one surface of the continuous filament layer in the form as it is or in the form of an air-through nonwoven fabric heat-treated by an air-through method, and both are partially joined and integrated in the thickness direction. In this way, a composite sheet precursor is formed. A partially broken plan view of this precursor is shown in FIG.

  As shown in FIG. 2, the precursor 10 'is composed of a random web 1' made of short fibers and a continuous filament layer 2 'oriented in one direction. Both are integrated in the thickness direction by a large number of joints 3. The small elliptical joint 3 has a major axis extending in a direction perpendicular to the orientation direction of the continuous filament. In this state, the continuous filaments are not crimped and are linear.

  When the random web 1 ′ and the continuous filament layer 2 ′ are bonded at a temperature higher than the crimping temperature of the continuous filament, the precursor 10 ′ is not formed. Crimps to occur. Accordingly, the continuous filament layer 2 'heat shrinks in the orientation direction of the continuous filament. However, the random web 1 'does not shrink. Therefore, the random web 1 ′ positioned between the joints 3 protrudes in the thickness direction by an amount corresponding to the shrinkage of the continuous filament layer 2 ′, and a large number of convex portions 4 (see FIG. 1) are formed. can get. On the other hand, when joining is performed at a temperature lower than the crimping temperature of the continuous filament, the precursor 10 ′ shown in FIG. 2 is obtained.

  The precursor 10 'is then heated to a temperature above the crimping temperature of the continuous filament. For heating, blowing hot air, irradiating with infrared rays, or the like is used. As a result, crimp and shrinkage due to thermal shrinkage of the continuous filament occur, and the random web 1 ′ located between the joints 3 is raised to form a large number of convex portions 4 (see FIG. 1), thereby obtaining a composite sheet. It is done.

  As another embodiment of the present invention, the fibers constituting the composite sheet 10 between the joints 3 protrude in the thickness direction of the composite sheet 10 to form a plurality of convex portions on the upper and lower surfaces of the composite sheet 10. The embodiment which is carrying out is mentioned. That is, in the embodiment shown in FIG. 1, the convex portion 4 is formed only on the first fiber layer 1 side, but in the present embodiment, the convex portion is also formed on the second fiber layer 2 side. Yes. The convex portion formed on the second fiber layer 2 side is mainly composed of constituent fibers of the second fiber layer 2. By using the composite sheet 10 in such a form, when the sheet 10 is used as a top sheet of an absorbent article, a certain space is maintained between the bottom surface of the top sheet and the top surface of the absorbent body. become. As a result, there is an advantageous effect that the liquid once absorbed by the absorbent body is less likely to return to the top sheet (so-called wet back). Further, the top sheet has high followability to the wearer's movement, and as a result, the absorbent article provided with the top sheet has an advantage that misalignment hardly occurs during wearing. In order to manufacture the composite sheet 10 having such a form, the amount of crimped fibers to be blended in the first fiber layer 1 and the second fiber layer 2 is adjusted, and convexes formed on each surface of the composite sheet 10. What is necessary is just to control the degree of the protrusion of a part.

  The present invention is not limited to the embodiment. In the above embodiment, the composite sheet is used as a surface sheet of a sanitary napkin. However, the composite sheet 10 of the present invention can be used as a surface sheet of other absorbent articles such as disposable diapers and incontinence pads.

  Moreover, the composite sheet 10 can also be used as a fiber sheet other than the surface sheet in the absorbent article. For example, the composite sheet 10 can be used as an intermediate fiber sheet (generally called an intermediate sheet or a sublayer sheet) disposed between the top sheet and the absorber. When used in such a manner, there is an advantage that an absorbent article having good liquid absorbability and a small amount of wetback can be obtained.

  Further, the composite sheet 10 can be used as a wiper for interpersonal / objective purposes. Since the composite sheet 10 has stretchability, the followability to the unevenness of the surface to be cleaned becomes good. In addition, wearability and operability to hands and cleaning tools are also improved. Furthermore, relatively large dust such as bread crumbs is easily held in the concave portions between the convex portions 4. Moreover, when the convex part 4 contains the crimped fiber, especially the three-dimensional crimped fiber, the trapping property of the fibrous dust is further enhanced.

  Moreover, since the 2nd fiber layer 2 has the collection property with the high freedom degree of a fiber, when using the composite sheet 10 as a sheet | seat for cleaning, fibers other than the junction part 3 have couple | bonded so much. Preferably not.

  In the composite sheet 10 of the above embodiment, the inside of the convex portion 4 is filled with fibers, but the inside of the convex portion 4 may be hollow.

  Further, as the continuous filament, a normal heat-shrinkable fiber may be used in place of the latent crimpable fiber in which crimp has been developed. That is, all of the continuous filaments constituting the second fiber layer 2 may be fibers other than crimped fibers. The same applies to the first fiber layer 1, and all the short fibers constituting the first fiber layer 1 may be fibers other than the crimped fibers.

It is sectional drawing of the napkin which shows the example which used the composite sheet of this invention as the surface sheet of a sanitary napkin. It is a partially broken top view which shows the precursor obtained in the process of manufacturing the composite sheet shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 1st fiber layer 2 2nd fiber layer 3 Joint part 4 Convex part 5 Continuous filament 10 Three-dimensional sheet material 20 Sanitary napkin 21 Back sheet 22 Absorber

Claims (9)

It has a first layer made of short fibers and a second layer made of stretchable continuous filaments oriented in one direction, and both layers are partially joined at a number of joints and integrated in the thickness direction. The joint has a shape extending in a direction intersecting with the orientation direction of the continuous filament and is formed discontinuously in the direction, and the first layer is formed between the joints. A composite sheet that protrudes to form a large number of convex portions and has elasticity in the orientation direction of the continuous filament.   The composite sheet according to claim 1, wherein the continuous filaments are three-dimensionally crimped. The composite sheet according to claim 1 or 2 , wherein the first layer has a tensile strength in a direction perpendicular to the orientation direction of the continuous filaments of 1.5 times or more of the tensile strength in the orientation direction. The continuous filament is a heat-shrinkable fiber that has been heat-shrinked, and the convex portion is formed by shrinking the heat-shrinkable fiber simultaneously with or after the joining of the first layer and the second layer. Item 4. The composite sheet according to any one of Items 1 to 3 . The composite sheet according to any one of claims 1 to 4 , wherein the short fibers contained in the first layer are three-dimensionally crimped. The composite sheet according to any one of claims 1 to 5 , wherein the composite sheet has a large number of convex portions on the second layer side. Used as a surface sheet of an absorbent article, the first layer is directed to the skin side of the wearer, the second layer is disposed on the absorbent body side, and the orientation direction of the continuous filaments coincides with the longitudinal direction of the absorbent article The composite sheet according to any one of claims 1 to 6 , wherein the sheet is arranged as described above. A method for producing a composite sheet according to claim 4 ,
The continuous filament web is superposed on one surface of the continuous filament oriented in one direction, the two are partially joined and integrated in the thickness direction, and at the same time or after the integration, the continuous filament. A method of manufacturing a composite sheet in which a large number of convex portions are formed by heat shrinking. In an absorbent article having a liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-retaining absorbent disposed between both sheets,
The composite sheet according to claim 1 is used as the surface sheet, and the composite sheet is arranged such that the first layer is directed to the skin side of the wearer and the second layer is disposed on the absorber side.
An absorbent article in which a composite sheet is arranged so that the orientation direction of the continuous filaments coincides with the longitudinal direction of the absorbent article.

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