DE112016004589T5 - Web-like article and method of making a web-like article - Google Patents

Abstract

A sheet-like article (1) for an absorbent article of the invention comprises a plurality of absorbent units (4) each having a long base portion (2) and water-absorbent polymer particles (3) attached to a surface on a first side of the long base portion (2 ) are fixed. In the sheet-like article (1), the absorbent units (4) are arranged so that their longitudinal directions are oriented in one direction. Before the water-absorbent polymer particles (3) absorb liquid, the water-absorbent polymer particles (3) are fixed to the surface on the first side of each of the long base portions (2) and further to lateral side edge portions (2s) extending in the longitudinal direction of each of fixed long base sections (2).

Description

Technical area

The invention relates to a sheet-like article used for an absorbent article, and to a method for producing the sheet-like article.

Technical background

Absorbent parts suitable for absorbent articles, e.g. Disposable diapers, sanitary napkins and incontinent briefs, generally by sucking and accumulating a raw material for an absorbent member, the raw material containing pulp fibers and a water-absorbent polymer supplied on an air flow, into a depression formed on an outer circumferential surface of a rotary drum and then covering a fiber stack so accumulated in the depression with a water-permeable sheet material. However, the weight of the water-absorbent polymer is extremely larger than the weight of the pulp fibers, and the water-absorbent polymer tends to be unevenly distributed. With such an uneven absorbent part, it is easy to obstruct swelling, e.g. Gel blocking, and the maximum absorption performance of the water-absorbing polymer can not be demonstrated.

Patent Literature 1 discloses a body fluid absorbing member in which two sheets are fastened to each other via a plurality of fixing members, channel spaces, each longitudinally continuous, are formed between the fixing members adjacent to each other, and an absorbent material is disposed in each channel space the absorbent material is formed by integrating a body fluid absorbent material containing a water-absorbent superpolymer with a shrinkable material. With the body fluid-absorbing member disclosed in Patent Reference 1, the entire absorbent member can be effectively used.

Patent Reference 2 discloses an absorbent article having an absorbent member having a precipitation portion slot portion in its part facing the precipitation portion, in which longitudinally extending longitudinal slots are formed in a distributed state, and also a central slot portion in the central portion of the precipitation portion slot portion in the transverse direction and longitudinal direction. With the absorbent article disclosed in Patent Reference 2, the wearing comfort can be increased.

Patent Reference 3 discloses an absorbent article having an absorbent member in which four or more slits are arranged at intervals. With the absorbent article disclosed in Patent Reference 3, the rigidity of the absorbent member can be alleviated, and the absorbency can be increased.

List of quotes

• Patentzitat 1: JP 2002-224162A
• Patentzitat 2: JP 2015-42244A
• Patentzitat 3: JP S63-18122U

patent citations

• Patent citation 1: JP 2002-224162A
• Patent quote 2: JP 2015-42244A
• Patent citation 3: JP S63-18122U

Summary of the invention

The invention relates to a web-like article for a multiple absorbent unit absorbent article, each absorbent unit comprising: a long base section having a transverse direction, a longitudinal direction that is longer than the transverse direction, and a thickness direction, and water-absorbent polymer particles attached to a surface a first side of the long base portion are fixed, wherein the absorbent units are arranged so that the longitudinal direction of the absorbent unit is oriented in at least one direction.

Before the water-absorbent polymer particles absorb a liquid, the water-absorbent polymer particles are fixed to the surface on the first side of the long base portions and further fixed to lateral side edge portions of each long base portion extending in the longitudinal direction.

In addition, the invention relates to a method for producing a web-like article for an absorbent article, the web-like article comprising a plurality of absorbent units, each comprising: a long base section having a transverse direction, a longitudinal direction that is longer than the transverse direction, and a thickness direction and water-absorbent polymer particles fixed to a surface on a first side of the long base portion, wherein the absorbent units are arranged so that the longitudinal directions of the absorbent unit are oriented in at least one direction, before the water-absorbing polymer particles absorb liquid water-absorbent polymer particles are fixed to the surface on the first side of each of the long base portions and further fixed to lateral side edge portions of each of the long base portions, wherein the transverse side edge portions in the longitudinal direction ers trek. The method for producing a sheet-like article of the invention comprises: a cutting step of cutting a base material sheet to form a plurality of the long base portions; a widening portion of a widening portion widening a distance between the long base portions adjacent to each other of the plurality of long base portions formed in the cutting step; and a water-absorbing polymer particle spreading step of spreading the water-absorbent polymer particles on the plural long base portions in which the distance between the long base portions adjacent to each other has been widened in the widening step.

list of figures

• 1 Figure 4 is a schematic cross-sectional view of one embodiment of a web-like article for an absorbent article of the invention showing a state before water-absorbent polymer particles absorb liquid.
• 2 is a schematic cross-sectional view of the web-like article according to 1 showing a state in which the water-absorbent polymer particles are swollen as a result of absorbing liquid.
• 3 is a perspective view of the web-like article according to 1 with a view from a top.
• 4 schematically shows an embodiment of an apparatus for producing the sheet-like article according to 1 ,
• 5 FIG. 12 is a schematic perspective view of a base material web cutting section corresponding to the manufacturing apparatus according to FIG 4 belongs.
• 6 FIG. 12 is a schematic perspective view of a widening portion corresponding to the manufacturing apparatus according to FIG 4 belongs.
• 7 is a perspective view of another embodiment of the web-like article of the invention as viewed from the top, showing a state before the water-absorbent polymer particles absorb liquid (FIG. 7 corresponds to 3 ). Description of the embodiments

In the absorbent part, the patent quote 1 is disclosed, the absorbent material containing the water-absorbent superpolymer is disposed in each of the channel spaces formed by the attachment via the fastening parts. Therefore, even after the water-absorbent superpolymer is swollen as a result of absorbing body fluid, it is difficult for the water-absorbent superpolymer to move in the thickness direction, and the maximum absorption performance of the water-absorbent superpolymer can not be exhibited.

In addition, the patent citations include 2 and 3 no indication of the position at which the water-absorbing polymer is fixed to the part formed by slitting.

Thus, the invention relates to the provision of a web-like article that can address the disadvantages of the conventional techniques described above. Moreover, the invention relates to the provision of a method for producing a web-like article, which method can address these disadvantages of the conventional techniques described above.

Hereinafter, the invention will be described based on preferred embodiments with reference to the drawings.

A sheet article of the invention is used for an absorbent article. In general, the absorbent article is used to excreted body fluid, eg. As urine and menstrual blood, too absorb and hold. For example, the absorbent article includes disposable diapers, sanitary napkins, incontinence pads, and the like. However, the absorbent article is not limited to these examples and is understood to encompass a wide range of articles used to absorb fluid excreted from the human body.

Normally, the absorbent article has a liquid-containing absorbent portion, a topsheet disposed on a skin-facing surface side of the absorbent portion, and a backsheet disposed on a non-skin-facing surface side of the absorbent portion. The absorbent member has the web-like article of the invention and a liquid pervious core wrapper covering the web-like article. That is, the sheet-like article of the invention is used for an absorbent article such as an absorbent member in which the sheet-like article is covered with the liquid-permeable core wrapping sheet. It should be noted that the absorbent article may also include a so-called lower layer web on the skin facing surface and / or the non-skin facing surface of the absorbent article.

Materials commonly used in the art can be used without restrictions as a top sheet, back sheet, and core wrapping sheet. For example, liquid-permeable webs, for. For example, various types of nonwoven fabrics subjected to hydrophilization treatment, perforated films, and the like. Ä., Used as a top track. Furthermore, liquid-impermeable or water-repellent webs, for. As a thermoplastic resin film, a laminate of this film and a nonwoven u. Ä., Can be used as a reverse path. The backsheet can be permeable to water vapor. Further, a thin paper piece (tissue paper) made by a wet paper-making method may be a liquid-permeable nonwoven fabric and the like. Ä. Are used as a core wrapper. In addition, the absorbent article may further comprise various types of parts in accordance with specific uses of the absorbent article. The person skilled in such parts are known. For example, when the absorbent article is applied to a disposable diaper or sanitary napkin, one or two or more pairs of leak-proof sleeves may be disposed on both lateral sides of the topsheet.

1 and 2 show schematic cross-sectional views of a web-like article 1 (hereinafter simply referred to as "sheet-like article 1"), which is a preferred embodiment of the sheet-like article of the invention. The web-like article 1 according to 1 is in a state before water-absorbent polymer particles absorb liquid (hereinafter also called simply "state before use"). The web-like article 1 according to 2 is in a state in which the water-absorbent polymer particles are swollen as a result of absorption of liquid (hereinafter also referred to simply as "state after swelling"). Here, "state by swelling" means a state of the water-absorbent polymer particles after the absorbent part 1 in a physiological saline solution (0.9% by mass aqueous sodium chloride solution) whose temperature is controlled to 25 ° C was immersed for 60 minutes. 3 shows a perspective view of the web-like article 1 in a condition before use.

The web-like article 1 according to 1 has several absorbent units 4 each comprising: a long base section 2 which has a transverse direction (X direction), a longitudinal direction (Y direction) longer than the transverse direction (X direction), and a thickness direction (Z direction), and water-absorbent polymer particles 3 (hereinafter also simply called "water-absorbing polymer 3") attached to a surface on a first side of the long base portion 2 are fixed, and the absorbent units 4 are arranged so that their longitudinal directions (directions Y) are oriented in at least one direction. In this case, the transverse direction (X direction), the longitudinal direction (Y direction), and the thickness direction (Z direction) of each long base portion fall 2 with the transverse direction (X direction), the longitudinal direction (Y direction), and the thickness direction (Z direction) of each absorbent unit 4 according to this embodiment also coincide with the transverse direction (direction X), the longitudinal direction (direction Y) and the thickness direction (direction Z) of the sheet-like article 1 (see 3 ) together. It should be noted that the longitudinal direction (direction Y) of the web-like article 1 Also coincides with the front-back direction of a wearer, when he an absorbent article with the web-like article 1 wearing.

In the web-like article 1 according to 1 For example, the plurality of absorbing units 4 are arranged such that the longitudinal directions (directions Y) of the absorbent units 4 in the longitudinal direction (Y direction) of the sheet-like article 1 are oriented (see 3 ). From the perspective of facilitating movements of the absorbent units 4 is not an interposed material between the absorbent units 4 . 4 present in the transverse direction (X direction) of the long base sections 2 (absorbent units 4 ) are adjacent to each other. That is, every absorbent unit 4 is not wrapped in an inserted material. In 1 and 2 Forms a top that is the first side of each long base section 2 is, the skin-facing surface that lies opposite the skin of the wearer, and a base that is a second side of each long base section 2 is the non-skin facing surface which is opposite to the reverse side lane. That is, a page opposite to the first page is the second page.

In a state before use is every absorbent unit 4 of the web-like article 1 formed in a rectangular shape, which is elongated in the longitudinal direction Y. Every absorbing unit 4 has a length Lx which is preferably between 0.5 mm and 10 mm inclusive and more preferably between 1 mm and 5 mm inclusive in the transverse direction X. In the longitudinal direction Y has each absorbent unit 4 a length Ly which is preferably between 20 and 200 times, and more preferably between 40 and 80 times the length Lx in the transverse direction X. On the condition that this factor is satisfied, the length Ly of each absorbing unit is 4 in the longitudinal direction Y, preferably between 10 mm and 500 mm inclusive, and more preferably between 200 mm and 400 mm inclusive. As previously described, the absorbent units have 4 each a long and narrow shape.

In this embodiment, the water-absorbing polymer particles 3 fixed to lateral side edge portions of each of the long base portions, whereby a size relation between the width W2 of each of the long base portions and the length Lx of each of the absorbent units 4 in the transverse direction X is preferably 0 μm <(Lx - W2) <1400 μm and more preferably 200 μm <(Lx - W2) <1000 μm.

In this embodiment, the sheet-like article 1 is formed in a rectangular shape, which is elongated in the longitudinal direction (Y direction) in a state before use. The track-like article 1 has an approximate length of between 100 mm and 1000 mm inclusive in the longitudinal direction (Y direction) and an approximate length between 50 mm and 300 mm inclusive in the transverse direction (X direction).

The web-like article 1 has an absorption area AT in which the multiple absorbent units 4 are arranged so that they are oriented in at least one direction in the state before use. From the point of view of facilitating liquid absorption in areas where the water-absorbing polymer particles 3 are fixed, is in plan view of the web-like article 1 in a state before use, the ratio of the absorption area AT to the entire sheet-like article 1 preferably at least 20% and more preferably at least 50% and preferably at most 100% and more preferably at most 90%, and more preferably this ratio is preferably between 20% and 100% inclusive, and more preferably between 50% and 90% inclusive. Here, the ratio of the absorption area AT of 100% means a shape in which, for example, in the arrangement of the plurality of absorbent units 4 side by side in the transverse direction (direction X) of the sheet-like article 1 such that the longitudinal directions (directions Y) of the absorbent units 4 in the longitudinal direction (Y direction) of the sheet-like article 1 oriented, the absorbent units 4 over the entire area of the web-like article 1 are arranged, being between both ends of the sheet-like article 1 in the longitudinal direction (direction Y) are stretched. Alternatively, they are the multiple absorbent units 4 side by side in the longitudinal direction (Y direction) of the sheet-like article 1 arranged so that the longitudinal directions (directions Y) of the absorbent units 4 in the transverse direction (direction X) of the sheet-like article 1 oriented, the ratio of the absorption area AT of 100% means a form in which the absorbing units 4 over the entire area of the web-like article 1 are arranged, wherein they are stretched between both transverse sides, extending in the longitudinal direction (Y direction) of the web-like article 1 extend. It should be noted that in plan view of the web-like article 1 Form areas except for the absorption area AT slot-free areas NT, which will be described later.

In the case where the absorbent units 4 are arranged so that their longitudinal directions (Y directions) in the longitudinal direction (Y direction) of the web-like article 1 are the number of absorbent units 4 which are arranged per single sheet-like article, preferably at least 3 and more preferably at least 50 and preferably at most 1000 and more preferably at most 500, and in particular the number of absorbent units 4 which are arranged per single sheet-like article, preferably between 3 and 1000 inclusive, and more preferably between 50 and 500 inclusive. In the case where the absorbent units 4 are arranged so that their longitudinal directions (directions Y) in the transverse direction (direction X) of the sheet-like article 1 are the number of absorbent units 4 which are arranged per single sheet-like article, preferably at least 3 and more preferably at least 50 and preferably at most 3500 and more preferably at most 2000, and in particular the number of absorbent units 4 , which are arranged per single sheet-like article, preferably between 3 and 3500 inclusive, and more preferably between 50 and 2000 inclusive. The absorbent units are counted 4 as follows: If you draw a certain one Especially in the transverse direction X, the maximum number of absorbing units that intersect this straight line is the number of absorbing units 4 Are defined.

In view of easy transport during manufacture, it is preferable that the sheet-like article 1 in a state before use has a shape in which the multiple absorbent units 4 are arranged so that their longitudinal directions (Y directions) in the longitudinal direction (Y direction) of the web-like article 1 are oriented, and more preferred is that the plurality of absorbent units 4 are arranged so that they do not intersect each other. Formed is the web-like article 1 according to 1 by using several absorbent units 4 , each long base sections 2 having uniform widths, and arranging these absorbing units 4 such that the longitudinal directions (directions Y) of the absorbent units 4 in the longitudinal direction (Y direction) of the sheet-like article 1 are oriented.

It is preferred that the sheet-like article 1 slot-free areas NT has, in which several long base sections 2 in the transverse direction (direction X) at both ends of the sheet-like article 1 in the longitudinal direction (Y direction) or both transverse sides, which are in the longitudinal direction (Y direction) of the web-like article 1 extend. According to 3 indicates the web-like article 1 In this embodiment, the slot-free regions NT at both ends of the sheet-like article 1 in the longitudinal direction (direction Y). That is, the web-like article 1 This embodiment comprises a single base material web, the slot-free regions NT are provided at both ends of the base material web in the longitudinal direction (Y direction), and the plural long base portions 2 formed by a cutting step, which will be described later, are provided between the slot-free regions NT. If such slot-free regions NT are provided, the following effects are obtained: In a state before use, the web shape of the sheet-like article remains 1 without problems, it is unlikely that the structure will fall apart, and transportation during manufacture is easy. It is preferred that the water-absorbing polymer particles 3 not arranged in the slot-free areas NT. Are the water-absorbing polymer particles 3 According to the description, not arranged in the slot-free regions NT, it is also after liquid absorption of the water-absorbing polymer particles 3 unlikely that the water-absorbing polymer particles 3 in the slot-free areas NT swell, and one obtains the following effects: even in a state of sources remains the web shape of the web-like article 1 easily noticed, the structure is unlikely to fall apart, liquid is easily absorbed in the area in which the water-absorbing polymer particles 3 are fixed, and in the web-like article 1 Overall, balance can be easily achieved. In addition, as in the case of the web-like article 1 according to 3 in the case where the slot-free areas NT at both ends of the sheet-like article 1 in the longitudinal direction (direction Y) are provided using this web-like article 1 for an absorbent article preferably that both ends of the web-like article 1 in the longitudinal direction (Y direction) are fixed to the absorbent article, since the web shape of the sheet-like article 1 is then easily maintained, it is unlikely that the structure will fall apart and the absorption region AT has improved softness and is unlikely to feel uncomfortable to the wearer.

In the web-like article 1 according to 1 is in view of the amount of water-absorbing polymer particles 3 passing through the long base sections 2 sources, flexibility, air permeability, preservation of railway the ratio (W2 / W1) of the width (W2) (length in the transverse direction (X direction)) of each long base section 2 to the width (W1) of the web-like article 1 preferably at least 0.001 and more preferably at least 0.002 and preferably at most 0.200 and more preferably at most 0.040, and more preferably this ratio is preferably between 0.001 and 0.200 and especially between 0.002 and 0.040 inclusive.

Preferably, from the same viewpoint, the width (W2) of each long base portion is 2 preferably at least 0.3 mm and more preferably at least 0.6 mm and preferably at most 10 mm, more preferably at most 2.0 mm and even more preferably at most 1.8 mm, and in particular the width (W2) of each long base section 2 preferably between 0.3 mm and 10 mm inclusive, more preferably between 0.6 mm and 2.0 mm inclusive and even more preferably between 0.6 mm and 1.8 mm inclusive.

With "width (W2) of each long base portion 2", the distance between both lateral side edge portions extending in the longitudinal direction Y is each long base portion 2 designated. "Width (W1) of the sheet-like article 1" refers to the distance between both lateral-side edge portions extending in the longitudinal direction Y of the sheet-like article 1 ,

It is preferred that the long base sections 2 (Base material web) containing the respective absorbent units 4 are formed of a hydrophilic sheet, since liquid diffuses easily in the absorption area AT and the efficiency of utilization of the water-absorbing polymer 3 is improved. By definition, a "hydrophilic web" is a web having a contact angle relative to a single constituent fiber below 90 °, or a web having a contact angle relative to its surface of less than 90 ° if the web is not made of a fibrous material. Note that the contact angle is measured in accordance with a method described later. For example, a sheet-like article containing a hydrophilic material can be used as the hydrophilic sheet. Examples of the hydrophilic sheet include a paper piece, a nonwoven fabric, a woven fabric and an artificial sponge formed by foaming a synthetic resin, and among these hydrophilic sheets, a nonwoven fabric is preferably used because nonwoven fabrics have a relatively high tensile strength despite a small thickness and are thin and can be made to be flexible. These hydrophilic sheets may be used alone or in combination of two or more. Hydrophilic nonwoven fabrics containing hydrophilic fibers as constituent fibers, hydrophilic nonwoven fabrics containing fibers as constituent fibers obtained by imparting hydrophilicity to synthetic fibers, and the like. Ä. Come preferably as a nonwoven fabric used. The basis weight of the nonwoven fabric is preferably between 5 g / m ² and 100 g / m ² inclusive, and more preferably between 10 g / m ² and 40 g / m ² inclusive. For example, hydrophilic nonwoven fabrics known in the art, e.g. For example, spun-bonded nonwoven fabrics, melt-blown nonwoven fabrics, spunlaced nonwovens, and air-through nonwovens may be used without restrictions as the hydrophilic nonwoven fabric.

Method for measuring the hydrophilicity of the long base sections

The contact angle of water relative to the constituent fiber of a web (hydrophilic web) from which the long base portions are formed or the contact angle of water relative to a surface of the long base portions is measured in the following manner. An automatic contact angle meter MCA-J manufactured by Kyowa Interface Science Co., Ltd. is used as a measuring device. To measure the contact angle, distilled water is used. The amount of liquid coming from an ink-jet water droplet delivery section (PulseInjector CTC- 25 , manufactured by Cluster Technology Co., Ltd. and having an opening diameter of the discharge portion of 25 μm) is set to 20 picoliters, and a water droplet is dropped directly onto the constituent fiber. Images of how the water droplet is dropped are recorded by a high-speed image recorder connected to a horizontally placed camera. From the viewpoint of the subsequent image analysis operation, it is desirable that the image recording apparatus be a personal computer in which a high-speed detection apparatus is installed. In this measurement, an image is recorded every 17 ms. The first image of the recorded images, in which the water droplet is deposited on the constituent fiber forming the skin-facing or non-skin-facing surface of the nonwoven fabric, is analyzed by means of an attached FAMAS software (software version: 2.6.2, Analytical technique: dormant drop method, analytical method: 0/2 method, image processing algorithm: non-reflective, image processing mode: frame, threshold: 200 and curvature correction: none), and the angle through which a surface of the water droplet in contact with air is formed, and the constituent fiber is formed, is calculated and used as a contact angle.

Note that in the case where the long base portions are formed of a nonwoven fabric, measurement samples (constituent fibers taken from the nonwoven fabric) are obtained by cutting constituent fibers of the nonwoven fabric to the 1 mm fiber length from the outermost layer, the constituent ones Fibers are placed on a sample rack of the contact angle meter and kept horizontal, and the contact angle is measured at two positions per single constituent fiber. For each of the various sections described above, the contact angle is measured to the first decimal with respect to N = 5 constituent fibers, and an average (rounded off to one decimal place) of measurements measured at a total of 10 positions is defined as the contact angle of that position ,

Various water-absorbing polymers conventionally used in the field of absorbent articles can be used as the water-absorbent polymer 3 used on a surface of each long base section 2 is fixed. Examples of such water-absorbing polymers include sodium polyacrylate (acrylic acid-vinyl alcohol) copolymers, cross-linked sodium polyacrylate, (starch-acrylic acid) graft polymers, (isobutylene-maleic anhydride) copolymers and their saponified products, potassium polyacrylate and cesium polyacrylate, and these water-absorbent polymers may be used alone or be used as a mixture of two or more. There are several types of water-absorbing polymer particles 3 based on differences in shape, eg. B. a kind of irregular shape, a kind with Lump form, a kind with barrel shape, a kind with spherical particle agglomerate, a spherical type u. Ä., however, any kind can be used. In the web-like article 1 comes a spherical type used.

As a method of fixing the water-absorbent polymer particles 3 on the surface of each long base section 2 For example, a method using an adhesive, a chemical fixing method using hydrogen bonding or the like, or forming the long base portions may be used 2 from a nonwoven fabric or a woven fabric, a process for roughening the constituent fibers of the nonwoven fabric or the fabric and fixing the water-absorbent polymer particles 3 between the roughened constituent fibers. In the web-like article 1 according to 1 and 2 becomes an adhesive 5 used. That is, the water-absorbing polymer particles 3 of the web-like article 1 are on the surface of each long base section 2 over the glue 5 fixed. Are the water-absorbing polymer particles 3 on the surface of each long base section 2 over the glue 5 fixed in this way, it is in a condition before use of the sheet-like article 1 or in a state of swelling, it is unlikely that the water-absorbing polymer particles will 3 solve, which is why the glue 5 is preferably used.

For example, a hot melt adhesive is preferred as an adhesive 5 for use. Examples of the hot melt adhesive include styrene-based or olefin-based hot melt adhesives and the like. Examples of styrene-based hot melt adhesives which can be used include a styrene-butadiene-styrene copolymer (SBS), a styrene-isoprene-styrene copolymer (SIS), a styrene-ethylene-butylene-styrene copolymer (SEBS ) prepared by hydrogenating SBS and a mixed hot melt adhesive obtained by mixing two or more of these adhesives. Of these, in view of easily attaining a balance between the adhesive force and the cohesion, a mixed hot melt adhesive obtained by mixing SIS and SBS or a mixed hot melt adhesive obtained by mixing SIS and SEBS is particularly preferably used. The amount of hot melt adhesive to be applied is preferably between 0.5 g / m ² and 100 g / m ² inclusive, and more preferably between 5 g / m ² and 50 g / m ² inclusive.

In the web-like article 1 according to 1 are in a pre-use state (before sources) of the water-absorbing polymer particles 3 not only on the surface on the first side (top) of each long base section 2 , but also on transverse side edge portions 2s every long base section 2 fixed, with the transverse side edge portions 2s extend in the longitudinal direction (Y direction). Preferably, in the web-like article 1 this embodiment according to 1 the glue 5 to an area of each long base section 2 applied by a transverse side edge portion 2s to the other transverse side edge portion 2s , wherein the lateral side edge portions 2s extend in the longitudinal direction (Y direction), are stretched over the surface on the first side (top). Therefore, in the web-like article 1 In this embodiment, the water-absorbing polymer particles 3 at the transverse side edge portions 2s the single long base sections 2 over the glue 5 fixed, and further, the water-absorbing polymer particles 3 on the surfaces on the first side (top) of the individual long base sections 2 over the glue 5 fixed.

According to 1 are in the web-like article 1 this embodiment in a state before use (before sources) the water-absorbing polymer particles 3 at the transverse side edge portions 2s every long base section 2 fixed, which is why when using the web-like article 1 for an absorbent article after swelling at the transverse side edge portions 2s fixed water-absorbing polymer particles 3 as a result of liquid absorption according to 2 the position of each long base section 2 in the thickness direction (direction Z) is probably different from that before liquid absorption. Here, the difference means the position of each long base section 2 in the thickness direction (direction Z) in a state of swelling of the sheet-like article from the liquid absorption that the sheet-like article 1 is designed so that the position of each long base section 2 in a state after swelling of the water-absorbent polymer particles 3 according to the state 2 , and the position of the long base section 2 in a condition before use (before swelling) of the water-absorbent polymer particles 3 according to the state 1 , differ in vertical direction from each other. In particular, a case is conceivable in which the position of each long base section 2 a case in which the position is shifted obliquely, a case in which the position is shifted both vertically and obliquely, or the like.

Is it with use of the web-like article 1 for an absorbent article according to 2 probably, that the positions of the water-absorbing polymer particles 3 on the long base sections 2 of those prior to liquid absorption of the water-absorbent polymer particles 3 differ in the thickness direction (direction Z), so it is also in mutual contact of the water-absorbing polymer 3 . 3 on the transverse side edge portions 2s the long base sections 2 in the absorbent units 4 . 4 which are adjacent to each other when the water-absorbing particles 3 Absorb body fluid and swell, for the adjacent absorbent units 4 . 4 easy to move freely in the thickness direction (direction Z), thereby mitigating collisions between the water-absorbent polymer particles 3, 3 which are swelled, pressure can be reduced, which on the water-absorbing polymer particles 3 which are swollen, and it is unlikely that the water-absorbing polymer particles 3 be prevented from absorbing the body fluid. So if the sheet-like article 1 In this embodiment, the water-absorbing polymer particles 3 Absorb and swell body fluid, it is unlikely to swell the water-absorbing polymer particles 3 comes, and the water-absorbing polymer particles 3 can show the maximum absorption capacity. Therefore, the absorption performance can be easily improved. As in particular in the web-like article 1 In this embodiment, there is no interposed material between the absorbing units 4, 4 adjacent to each other, it is easy for the absorbing units 4 to move, whereby the above-described effects are more easily achieved.

Besides, it is in the web-like article 1 in a state according to sources according to 2 probably, that the positions of the long base sections 2 containing the absorbent units 4 form adjacent to each other in the thickness direction (direction Z) so that the positions are vertically shifted, obliquely, etc. Therefore, it is for the adjacent absorbent units 4 . 4 easy to move freely in the thickness direction (direction Z), collisions between the water-absorbing polymer particles 3 . 3 that are swollen, are likely to be reduced, pressure can be reduced, which on the water-absorbing polymer particles 3 is exerted, and it is unlikely that the water-absorbing polymer particles 3 be prevented from absorbing bodily fluid.

In addition, according to 1 in the web-like article 1 this embodiment in a state before use (before sources) the water-absorbing polymer particles 3 at the surface on the first side (upper side) and both lateral side edge portions 2s of each long base section 2 over the glue 5 fixed. Because the water-absorbing polymer particles 3 not only on the surface on the first side (top) of each long base section 2 , but also on both transverse side edge portions 2s every long base section 2 are the amount of water-absorbing polymer particles 3 increased by the long base sections 2 be supported. Therefore, when using the web-like article 1 for an absorbent article improves absorbency.

In a condition before use (before sources) of the sheet-like article 1 according to the state 1 , the water-absorbing polymer particles can 3 at the surface on the first side (top) of each long base section 2 are fixed, inwardly from the transverse side edge portions 2s this long base section 2 may be present or may be in the vicinity of the transverse side edge portions 2s this long base section 2 be arranged. From the point of view of enabling the water-absorbing polymer particles 3a over the transverse side edge portions 2s every long base section 2 swell, as with the water-absorbent polymer particles 3a in a state according to sources according to 2 The case is, enabling the absorbent units 4 . 4 , which are adjacent to each other, move freely in the thickness direction (direction Z), making it even less likely that the swelling of the water-absorbing polymer particles 3 hindered are the water-absorbing polymer particles 3 preferably in the vicinity of the transverse side edge portions 2s every long base section 2 and, more preferably, present so as to extend over the lateral side edge portions 2s of each long base section from the beginning 2 extend, such as water-absorbing polymer particles 3b in condition before use (before sources) according to 1 , That the water-absorbing polymer particles 3 over the transverse side edge portions 2s every long base section 2 In other words, in other words, the water-absorbing polymer particles 3 so that they are the transverse side edge portions 2s every long base section 2 spread over, such as the water-absorbing polymer particles 3b according to 1 or water-absorbing polymer particles 3a according to 2 are swollen.

Furthermore, it is in the web-like article 1 from the perspective of allowing free movement of the absorbent units 4 . 4 that are adjacent to each other in the thickness direction (direction Z) and even less likely to hinder sources of the water-absorbent polymer particles 3 comes, preferably, that the distance between both transverse side edge portions 2s . 2s extending in the longitudinal direction (Y direction) of each long base section 2 greater than the average particle diameter of the water-absorbent polymer particles 3 in a state before use (before swelling) and smaller than the average particle diameter of the water-absorbent polymer particles 3 in a state after sources is. It should be noted that the distance between both lateral edge sections 2s . 2s every long base section 2 here in the same sense as the previously described width (W2) of each long base section 2 is used. The average particle diameter of the water-absorbing polymer particles 3 in a state before use (before swelling) is preferably at least 20 μm, and more preferably at least 200 μm, and more preferably at most 700 μm, and more preferably at most 500 μm, and more preferably, this average particle diameter is preferably between 20 μm and 700 μm inclusive, and more preferably between 200 μm and including 500 μm. On the other hand, the average particle diameter of the water-absorbent polymer particles is 3 in a state of swelling preferably at least 200 μm, and more preferably at least 800 μm, and preferably at most 3000 μm, and more preferably at most 2000 μm, and more preferably, this average particle diameter is preferably between 200 μm and 3000 μm inclusive, and more preferably between 800 μm and 2000 inclusive microns. Obtained are the average particle diameters of the water-absorbing polymer particles 3 using the measuring methods described below.

A method for measuring the average particle diameter d1 of the water-absorbent polymer particles in a state before use

The mean particle diameter d1 in a pre-use condition is measured by means of water-absorbent polymer particles before use. The diameters or major axes of the water-absorbing polymer particles are measured by optical microscopy. Here, "diameter" applies to the case where the water-absorbing polymer particles have a spherical shape. "Major axis" applies to the case where the water-absorbing polymer particles have an unusual shape, e.g. B. a rhombus shape, a rectangular shape, a cluster shape or a football ball resembling form. The diameters or major axes of a total of 50 water-absorbent polymer particles are measured, and a number average particle diameter is used as the average particle diameter of the water-absorbent polymer particles in a pre-use state.

A method of measuring the average particle diameter d2 of the water-absorbent polymer particles in a state of swelling

The mean particle diameter d2 in a state of swelling is measured in the following manner. The web-like article 1 is immersed in a physiological saline solution (0.9% by mass aqueous sodium chloride solution) whose temperature is controlled to 25 ° C. One hour after immersion becomes the web-like article 1 taken from the physiological saline solution and suspended vertically for 30 minutes to drain. Subsequently, the diameters or major axes of the water-absorbent polymer particles on the surfaces of the long base portions are measured by optical microscopy. Here, "diameter" applies to the case where the water-absorbing polymer particles have a spherical shape. "Major axis" applies to the case where the water-absorbing polymer particles have an unusual shape, e.g. B. a rhombus shape, a rectangular shape, a cluster shape or a football ball resembling form. The diameters or major axes of a total of 50 water-absorbent polymer particles are measured, and a number-average particle diameter is used as the average particle diameter of the water-absorbent polymer particles in the state of swelling.

Hereinafter, a preferred embodiment of a method for producing a web-like article of the invention with reference to 4 using a case as an example in which the sheet-like article 1 with the configuration described above. 4 shows a manufacturing device 100 which is preferably used for the method for producing a sheet-like article of this embodiment. The manufacturing device 100 This embodiment has a base material web cutting section 110 , a broadening section 170 , an adhesive application section 120 and a water-absorbing polymer distributing portion 130 in this order from an upstream side to a downstream side of the process of manufacture. It should be noted that the manufacturing device 100 according to 4 Although a device is used, in which the adhesive application section 120 and the water-absorbing polymer distributing portion 130 are integrated, but the adhesive application portion 120 and the water-absorbing polymer distributing portion 130 not necessarily be integrated. The above-described integrated device has a configuration in which the adhesive application section 120 is disposed on the upstream side in this device and the water-absorbing polymer distributing section 130 is arranged on the downstream side in this integrated device.
the base material web cutting section 110 is a section in which a continuous base material web 20 that is the raw material for the long base sections 2 is cut to several long base portions 2 to obtain. For cutting the base material web 20 For example, various types of known cutting devices can be used without restriction. According to 5 uses the manufacturing device 100 a cutting device 113 with a rotating tool 111b with several cutting blades 111 . 111 . 111 , ..., on a peripheral surface of the rotating tool 111b are arranged, and a take-up roll 112 that has a flat peripheral surface and that faces the rotating tool 111b is arranged. The cutting blades 111 the cutting device 113 extend in the direction of rotation of the rotating tool 111b , The several cutting blades 111 . 111 . 111 , ... are set up in a direction (X1 direction) perpendicular to a transporting direction (Y1 direction) of the continuous base material web 20 is. Distances between the cutting blades 111 . 111 that are adjacent to each other in the direction (X1) that is perpendicular to the transporting direction (Y1 direction) correspond to the widths (transverse lengths (X direction)) of the long base portions to be formed 2 , In this case, the transport direction (direction Y1) corresponds to the base material web 20 the longitudinal direction (Y direction) of the sheet-like article to be produced 1 , and the direction (X1 direction) perpendicular to the transporting direction (Y1 direction) corresponds to the transverse direction (X direction) of the sheet-like article to be produced 1 , It should be noted that for cutting the base material web 20 a shear cutting type cutting apparatus that performs cutting by shifting side surfaces of a top blade and a bottom blade against each other or a device in which a plurality of roller cutting blades are arranged side by side in the direction (X1 direction) perpendicular to the transporting direction (Y1 direction) or a laser device can be used which performs fusion cutting by irradiation with a laser beam.

As in the case of the web-like article 1 according to 3 can in the case where the sheet-like article 1 the slot-free areas NT at both ends of the sheet-like article 1 in the longitudinal direction (Y direction), for example, a depression 114 in a peripheral surface of each cutting blade 111 according to 5 be formed. The length of a circular arc of the section of the depression 114 in the outer periphery of each of the rotating cutting blades 111 is set to be the sum of the lengths in the longitudinal direction (Y direction) of the slot-free regions NT at both ends of the sheet-like article 1 according to 3 are arranged. A rotating tool 111b can be used, which is obtained by making several cutting blades 111 , 111a, 111a, ..., each such wells 114 have, and arranging the cutting blades 111 in which the positions of the depressions 114 . 114 the cutting blades 111 , which are adjacent to each other in the direction X1, are aligned. It should be noted that the length of a circular arc of a section except the recess 114 on the outer circumference of each of the rotating cutting blades 111 the length in the longitudinal direction (Y direction) of the long base sections 2 of the web-like article 1 according to 3 equivalent. Further, in the case where the sheet-like article 1 slot-free areas NT on both transverse sides, extending in the longitudinal direction (Y direction) of the web-like article 1 sufficiently, that the cutting blades 111a are not disposed at positions corresponding to these slot-free regions NT.

The broadening section 170 that is the base material web cutting section 110 is located downstream, is a section in which distances between the long base sections 2 . 2 , which are adjacent to each other in the direction X1, are broadened. To the distances between the long base sections 2 . 2 To widen, various known widening devices can be used without restriction. Examples of such known broadening devices include arcuate domed rollers, e.g. B. a balli roller, a spreader u. according to 6 has the manufacturing device 100 a cambered ball 171 on. The balligroll 171 is formed to have a length in the direction X1, that of the width (length in the transverse direction (X direction)) of the absorption area AT of the sheet-like article 1 corresponds, and has a peripheral surface according to 6 is arched outwards.

The adhesive application section 120 , the widening section 170 is downstream, is a section in which the glue 5 from above the surfaces on the first side (top) of the long base sections 2 is applied. According to 4 has the manufacturing device 100 an order header 121 on. Various known application devices can be used without restriction as an application head 121 be used. The order header 121 is designed so that in the direction of X1 the gun 121 has a length equal to the width (length in the transverse direction (X direction)) of the absorption area AT of the sheet-like article 1 equivalent. The order header 121 formed as described above is over the first side (upper side) of the long base portions 2 arranged.

The water-absorbing polymer distributing section 130 , the adhesive application section 120 lies downstream, is a section in which the water-absorbing polymer particles 3 above the surfaces on the first side (top) of the long base sections 2 are distributed to form the absorbent units 4. According to 4 has the manufacturing device 100 an inlet section 131 for water-absorbing polymer. Various types of known intake devices can without limitation as an inlet section 131 be used for water-absorbing polymer. The inlet section 131 for water-absorbent polymer is formed so that in the direction X1, the water-absorbent polymer inlet portion 131 has a length corresponding to the width (length in the transverse direction (X direction)) of the absorption area AT of the sheet-like article 1 equivalent. The inlet section 131 for water-absorbent polymer formed as described above is disposed above the first side (upper side) of the long base portions 2.

Moreover, in the manufacturing device 100 according to 4 a vacuum conveyor 141 is disposed at a position opposite to the apparatus into which the adhesive application section 120 and the water-absorbing polymer distributing portion 130 are integrated and those on the bottom of the plurality of long base portions 2 lies, which are transported. The vacuum conveyor 141 has an air-permeable endless belt 144 that is about a drive roller 142 and several powered rollers 143 extends, and a suction box 145 disposed at a position opposite to the aforementioned integrated device, wherein the air-permeable belt 144 between this device and the suction box 145 is held. The several long base sections 2 in which the distances between the long base sections adjacent to one another in the direction X1 2 . 2 in the widening section 170 Widened are on the vacuum conveyor 141 given up.

Furthermore, the manufacturing device has 100 according to 4 via a drive roller 151 containing the base material web 20 from a raw material roll of the continuous base material web 20 pulls off, and a drive roller 152 that are a manufactured precursor 1b of the web-like article 1 transported, with the drive roller 152 is provided on the most downstream side.

Next, a method for continuously producing sheet-like articles 1 with the aid of the production device described above 100 This embodiment describes, ie an embodiment of the method according to the invention for producing a web-like article.

The method of making the sheet-like article 1 according to this embodiment, comprises: a cutting step of cutting the continuous base material web 20 to several long basic sections 2 to build; a widening step of using the widening section 170 widening distances between the long base sections 2 . 2 which are adjacent to each other, the plurality of long base sections 2 that were formed in the cutting step; and a water-absorbing polymer particle-spreading step of distributing the water-absorbent polymer particles 3 on the several long base sections 2 in which the distances between the long base sections 2 . 2 which are adjacent to each other, widened in the widening step. In addition, according to this embodiment, an adhesive application step of applying the adhesive 5 as a step upstream of the water-absorbing polymer particle spreading step. That is, the method for producing the sheet-like article 1 According to this embodiment, the step of spreading has the step downstream of the cutting step, the step of applying the adhesive as the step subsequent to the broadening step, and the step dispersing the water-absorbent polymer particles as the step subsequent to the applying step of the adhesive.

Before performing the cutting step, a negative pressure in the suction box 145 is first generated by one with the suction box 145 connected evacuation device is started.

Next will be the drive roller 151 and the drive roller 152 powered, the cutting device 113 and the breathable band 144 are turned, and the vacuum conveyor 141 running. Thereafter, the base material web 20 by the drive roller 151 from the raw material roll of the continuous base material web 20 pulled off and between the pickup roller 112 and the several cutting blades 111 in the cutting device 113 the base material web cutting section 110 supplied, and the continuous base material web 20 is cut to form a plurality of long base portions 2 (cutting step). According to this embodiment, as in 5 shown the several cutting blades 111 which extend in the direction of rotation of the rotary tool 111b in the direction (X1) placed perpendicular to the transporting direction (Y1 direction) of the continuous base material web 20 is. Therefore, the continuous base material web becomes 20 along the transport direction (Y1 direction) of the base material web 20 at several sections of the continuous base material web 20 in the direction (X1 direction) which is perpendicular to the transporting direction (Y1 direction). Thereby, the plural long base portions 2 are formed. In addition, the sections formed by the cutting blades 111 were cut, the transverse side edge portions 2s the single long base sections 2 ,

Further, according to this embodiment, each of the plurality of cutting blades 111a has a recess 114 , While the continuous base material web 20 is transported, therefore, cut-free portions NTb in the base material web 20 formed intermittently at intervals equal to the length of the long base sections 2 in the longitudinal direction (Y direction) correspond. The length of each cut-free portion NTb is twice the length of each slot-free region NT in the longitudinal direction (Y direction). The several long base sections 2 formed in the cutting step extend parallel to the transporting direction (Y1 direction) and are arranged side by side in the direction (X1 direction) perpendicular to the transporting direction (Y1 direction).

Subsequently, distances between the long base sections 2 . 2 which are adjacent to each other, the plurality of long base portions formed in the cutting section 2 , in the widening section 170 widened (widening step). According to this embodiment, as shown in FIG 6 the several long base sections 2 which are arranged side by side in the direction (X1 direction) perpendicular to the transporting direction (Y1 direction) on the peripheral surface of the ball roller 171 transported, and the distances between the long base sections 2 . 2 that are adjacent to each other in the direction X1 are widened while the long base sections 2 on the peripheral surface of the ball roller 171 be transported.

Next is the glue 5 from above the first side (top) of the plurality of long base sections 2 plotted where the distances between the long base sections 2 . 2 which are adjacent to each other, widened in the widening step (adhesive application step). While, according to this embodiment, the plurality of long base sections 2 in which the distances between the long base sections 2 . 2 which are adjacent to each other in the direction X1, widened in the widening step, by the vacuum conveyor 141 be transported and on the suction box 145 lie, the glue will 5 except for the cut-free portions NTb from above the first side (upper side) of the plural long base portions 2 which are arranged side by side in the direction (X1 direction) perpendicular to the transporting direction (Y1 direction) through the gun 121 of the adhesive application section 120 applied intermittently. The glue 5 becomes from above the first side (upper side) of the long base sections 2 plotted where the distances between the long base sections 2 . 2 widened, which are adjacent to each other in the direction of X1, causing the adhesive 5 on the surfaces on the first side (upper side) and the lateral side edge portions 2s the single long base sections 2 is applied.

Subsequently, the water-absorbing polymer particles 3 on the glue 5 distributed from above the first side (upper side) of the plural long base portions 2 in the adhesive application step (water-absorbing polymer particles distributing step). While according to this embodiment, the long base portions 2 formed in the adhesive application step and in which the adhesive 5 on the surfaces on the first side (upper side) and the lateral side edge portions 2s the long base sections 2 is applied through the vacuum conveyor 141 be transported and on the suction box 145 are the water-absorbing polymer particles 3 on the glue 5 pointing to the surfaces on the first side (top) and the cross-side edge portions 2s the long base sections 2 plotted side by side at intervals in the direction (X1 direction) perpendicular to the transporting direction (Y1 direction) except for the cut-free portions NTb through the inlet portion 131 for water-absorbing polymer of the water-absorbing polymer distributing portion 130 distributed. As a result of the distribution of the water-absorbing polymer particles 3 In this way, multiple absorbent units 4 formed, in each of which the water-absorbing polymer particles 3 at the transverse side edge portions 2s and the surface on the first side (top) of the long base portion 2 over the glue 5 are fixed. The several absorbent units 4 thus formed are arranged so that their longitudinal directions (directions Y) are oriented in the transporting direction (direction Y1) and form the precursor 1b of the web-like article 1 ,

After that, the precursor becomes 1b of the web-like article 1 through the drive roller 152 transported to the downstream side and at each position, which halves the length of the individual cut-free portions NTb in the transport direction (direction Y1), cut by means of a known cutting device (not shown). This will be web-like articles 1 each having slot-free areas NT continuously produced at both ends in the longitudinal direction (Y direction). As previously described, with the manufacturing device 100 This embodiment and the manufacturing method of this embodiment, in which the manufacturing device 100 is used, web-like articles 1 be made stable and efficient.

The invention is not limited to the above embodiments and the manufacturing method of the above embodiment, and changes can be made thereto appropriately.

In the previously described web-like article 1 according to 1 are the water-absorbing polymer particles 3 at the surface on the first side (top) of each long base section 2 fixed. However, from the viewpoint of improving the liquid absorption performance of the sheet-like article 1 the water-absorbing polymer particles 3 not only on the surface on the first side (upper side), but also on the surface on the second side (lower side) of each long base section 2 be fixed. To the water-absorbing polymer particles 3 on both sides (top and bottom) of each long base section 2 To fix, for example, the production by means of the manufacturing device 100 according to 4 be carried out by the water-absorbing polymer particles 3 on the surfaces on the first side (upper side) and the lateral side edge portions 2s the long base sections 2 be fixed, then the long base sections 2 are turned over by a reversing roller and then the water-absorbing polymer particles 3 on the surfaces on the second side (bottom) of the long base sections 2 with the help of another water-absorbing polymer distributing section 130 be distributed and fixed.

When fixing the water-absorbing polymer particles 3 on both sides (top and bottom) of each long base section 2 From the viewpoint of still more realizing the above-described effects, it is preferable that the weight of the water-absorbent polymer 3 , the area per unit area of the surface on the second side (bottom) of a long base section 2 is fixed larger than the weight of the water-absorbent polymer 3 is, per unit area of the surface on the first side (top) of this long base section 2 is fixed. The weight of the water-absorbing polymer 3 , the per unit area of the surfaces on the first side (upper side) of the long base sections 2 is preferably between 10 g / m ² and 250 g / m ² inclusive, and more preferably between 30 g / m ² and 150 g / m ² inclusive. The weight of the water-absorbing polymer 3 , the per unit area of the surfaces on the second side (bottom) of the long base sections 2 is preferably between 30 g / m ² and 400 g / m ² and more preferably between 50 g / m ² and including 300 g / m ² .

The weight of the water-absorbing polymer 3 , the per unit area on the first side (top) of the long base sections 2 is fixed, and the weight of the water-absorbing polymer 3 , the per unit area on the second side (bottom) of the long base sections 2 is measured by a method below.

Method for measuring the weight of the water-absorbing polymer 3 , the per unit area on the first side (top) of the long base sections 2 is fixed, and the weight of the water-absorbing polymer 3 , the per unit area on the second side (bottom) of the long base sections 2 is fixed

The water-absorbing polymer on the second side (bottom) of the long base sections 2 is again fixed by means of an adhesive or the like from above this water-absorbent polymer, so that this water-absorbing polymer does not peel off. Thereafter, the water-absorbent polymer fixed to the first side (upper side) becomes of the long base portions 2 with the aid of a solvent or the like, and the adhesive adhering to the water-absorbent polymer is washed off. The water-absorbing polymer is dried. Thereafter, the weight of the water-absorbent polymer fixed on the first side (upper side) is measured. Based on the area of this section of the long base sections 2 to which the water-absorbent polymer was fixed and the weight of the separated water-absorbent polymer, the weight of the water-absorbent polymer fixed per unit area was calculated and used as the weight of the water-absorbent polymer per unit area on the first side (top). The measurement is performed on five samples and an average is calculated.

For the weight of the water-absorbing polymer per unit area on the second side (lower side) after pre-fixing of the water-absorbent polymer on the first side (upper side), separation of the water-absorbing polymer on the second side (lower side), washing and calculation to those as before described manner performed.

In addition, when fixing the water-absorbing polymer particles 3 on both sides (top and bottom) of each long base section 2 from the viewpoint of enabling a large amount of fluid to be held by the non-skin-facing surface (underside) away from the wearer's skin and improving the tactile feeling by preventing fluid from remaining on the skin-facing surface (upper side) , preferred that the water-absorbing polymer 3 . that at the surface on the first side (top) of a long base section 2 is fixed, a higher liquid passage capacity under pressure and a lower centrifugal retention capacity than the water-absorbent polymer 3 has that on the surface on the second side (bottom) of the long base section 2 is fixed. Under the aspect described above, with respect to the water-absorbent polymer 3 at the surfaces on the first side (top) of the long base sections 2 The liquid passage rate under 2.0 kPa pressure is preferably at least 20 ml / min, and more preferably at least 40 ml / min, and preferably at most 1000 ml / min, and more preferably at most 800 ml / min, and more preferably, this liquid passage rate is preferably between 20 ml and including 1000 ml / min and more preferably between 40 ml / min and 800 ml / min inclusive. Further, in view of the water-absorbent polymer 3 at the surfaces on the second side (bottom) of the long base sections 2 The liquid passage rate under 2.0 kPa pressure is preferably at least 0 ml / min, and more preferably at least 10 ml / min, and preferably at most 400 ml / min, and more preferably at most 200 ml / min, and more preferably, this liquid passage rate is preferably between 0 ml and including 400 ml / min and more preferably between 10 ml / min and 200 ml / min inclusive. The liquid flow rate under pressure is obtained by the following measurement method.

Method for measuring the liquid passage rate under pressure

The liquid flow rate under pressure is measured by means of a measuring method and a measuring device used in the JP 2003-235889A are disclosed. That is, in a 100 ml beaker, 0.32 ± 0.005 g of a water-absorbent polymer serving as a measurement sample is immersed in a physiological saline solution (0.9% by mass aqueous sodium chloride solution) in an amount which sufficiently causes. that the water-absorbent polymer swells, for example, the physiological saline solution in an amount of at least five times the absorption saturation amount of the water-absorbent polymer, and allowed to stand for 30 minutes. Separately, a cylindrical filtration tube is prepared. The cylindrical filtration tube has a cylinder (internal diameter 25.4 mm), which is placed vertically, and a wire mesh (mesh size 150 μm, a Sintered Bio-Column Stainless Steel Filter 30SUS commercially available from Sansyo Co., Ltd. to obtain) and a narrow tube (4 mm inner diameter, 8 cm long) equipped with a stopcock (2 mm inner diameter), the wire net and the narrow tube with the stopcock being provided at a lower end of an opening of the cylinder , The entire contents of the cup with the sample that has swelled are put into the prepared cylinder tube in a state where the stopcock is closed. Thereafter, a cylinder rod, which has a diameter of 2 mm and is provided with a wire mesh at a front end of the cylinder rod, wherein the wire mesh 150 microns mesh size and 25 mm in diameter, introduced into the cylindrical filtration tube so that the wire mesh with the Sample is brought into contact. Furthermore, a weight is placed so that 2.0 kPa of load is applied to the sample. In this state the measuring sample becomes 1 Minute left. Thereafter, the stopcock is opened to allow the solution to drain, and the time (T1) (s) is measured until the liquid level in the cylindrical filtration tube changes from a 60 ml graduation mark to a 40 ml graduation mark (ie, 20 ml of the solution) ). Based on the measured time T1 (s), the liquid passage rate under 2.0 kPa pressure is calculated by an equation below. Note that in the equation, T0 (s) represents a value obtained by measuring the time taken for 20 ml of the physiological saline solution to pass through the wire mesh when the measurement sample is not placed in the cylindrical filtration tube. $$\text{Fluid passage rate under pressure}\left(\text{ml / min}\right)\mathrm{=}\text{20}\times \text{60 /}\left(\text{T1}\mathrm{-}\text{T0}\right)$$

The measurement is made five times (n = 5) excluding the largest value and the smallest value and using the mean of the remaining three values as the measured value. In addition, the measurement is performed at 23 ± 2 ° C and a humidity of 50 ± 5%, and before the measurement, the samples are stored for at least 24 hours in the same environment. Further details of the method of measuring the rate of fluid flow under pressure are provided in the paragraphs 0008 and 0009 of the JP 2003 - 235889A discloses, and the measuring device is in 1 and 2 of the JP 2003-235889A disclosed.

Under the aspect described above, with respect to the water-absorbent polymer 3 at the surfaces on the first side (top) of the long base sections 2 The centrifugal retention capacity (water absorptivity) is preferably at least 20 g / g and more preferably at least 25 g / g and preferably at most 50 g / g and more preferably at most 45 g / g, and more preferably, the centrifugal retention is preferably between 20 g / g and including 50 g / g and more preferably between 25 g / g and 45 g / g inclusive. In addition, in view of the water-absorbing polymer 3 at the surfaces on the second side (bottom) of the long base sections 2 is fixed, the centrifugal retention capacity (water absorption capacity) is preferably at least 25 g / g and more preferably at least 30 g / g and preferably at most 65 g / g and more preferably at most 55 g / g, and more preferably, the centrifugal retention is preferably between 25 g / g and 65 g / g inclusive, and more preferably between 30 g / g and including 55 g / g. The centrifugal retention capacity (water absorption capacity) is measured by a following measuring method.

Method for measuring centrifugal retention capacity

(Water absorbency)

The centrifugal retention capacity (water absorption capacity) is determined in accordance with JIS K 7223 ( 1996 ). A nylon fabric (commercially available from Sanriki Seisakusyo, product name: nylon net, specifications: 250 stitches) is cut into a rectangle shape 10 cm wide by 40 cm long and folded lengthwise in the middle, and both sides are heat sealed to a nylon bag 10 cm width (inside dimension 9 cm) and 20 cm length to produce. Next, 1.00 g of a water-absorbent polymer serving as a measurement sample is accurately weighed and evenly placed in a bottom portion of the produced nylon bag. Thereafter, the nylon bag containing the sample is immersed in a physiological saline solution (0.9% by mass aqueous sodium chloride solution) whose temperature is controlled to 25 ° C. One hour after the start of immersion, the nylon bag is removed from the physiological saline solution, suspended vertically for one hour, and then dehydrated by means of a dehydrating centrifuge (manufactured by Kokusan Co., Ltd., model: H-130C special type). With regard to the dewatering conditions, dewatering occurs 10 Minutes at 143 G ( 800 U / min). After completion of dehydration, the mass of the sample is measured, and the target centrifugal retention capacity (water absorption capacity) is calculated by an equation below. $$\text{Zentrifugalretentionsvermögen}\left(\text{g / g}\right)=\left(\text{ABC}\right)\text{/ c}$$

In the equation, "a" denotes the total mass (g) of the sample and the nylon bag after the centrifugal dehydration is completed, "b" denotes the mass (g) of the nylon bag before absorbing water (in the dried state), and "c" denotes the mass (g) of the sample before absorbing water (in the dry state).

The measurement is carried out five times (n = 5) excluding the largest value and the smallest value and using the mean of the remaining three values as the measured value. In addition, the measurement is performed at 23 ± 2 ° C and 50 ± 5% humidity, and prior to measurement, the samples are stored for at least 24 hours in the same environment.

Although the previously described web-like article 1 according to 1 with the help of several absorbent units 4 is formed, the respective long base sections 2 With uniform widths, the long base sections can 2 also have uneven widths. Preferably, in plan view of the web-like article 1 the water-absorbing polymer particles 3 in an unevenly distributed manner and fixed in a section in which the weight of the unit per unit area fixed water-absorbing polymer 3 is relatively large, with the distance between both lateral edge portions 2s . 2s extending in the longitudinal direction (Y direction) of each long base section 2 can be relatively small. That is, in a comparison between a section in which the weight of the unit per unit area fixed water-absorbing polymer 3 is large, and a portion in which the weight of the unit per unit area fixed water-absorbing polymer 3 is small, the distance between both transverse side edge sections 2s . 2s every long base section 2 in the section where the weight of the unit per unit area of fixed water-absorbing polymer 3 is large, shorter than the distance between both lateral side edge portions 2s, 2s of each long base portion 2 in the section in which the weight of the unit per unit area fixed water-absorbing polymer 3 is small. With the web-like article 1 With the configuration described above, it is in the section where the weight of the unit per unit area of fixed water-absorbing polymer 3 is great for the absorbent units 4 . 4 that are adjacent to each other, easy to move freely in the thickness direction (direction Z), it is unlikely that the sheet-like article 1 hard, and the water-absorbing polymer particles 3 can show the maximum absorption capacity. Therefore, the absorption performance of the sheet-like article 1 easily improved.

Furthermore, in the previously described web-like article 1 according to 3 the multiple absorbent units 4 arranged so that their longitudinal directions (Y directions) in the longitudinal direction (Y direction) of the web-like article 1 are oriented. However, for example, according to 7 the several absorbent units 4 also be arranged so that their longitudinal directions (directions Y) in the transverse direction (direction X) of the sheet-like article 1 are oriented. It should be noted that the web-like article 1 according to 7 slot-free areas NT on both transverse sides, which extend in the longitudinal direction (Y direction). To the web-like article 1 according to 7 can produce the sheet-like article 1 can be formed by using a rotary tool in which cutting blades extending parallel to the axial direction of the roller are arranged at intervals in the circumferential direction of the rotary tool and a take-up roller and the base material web 20 is fed between the rotating tool and the take-up roll.

Also, in the web-like article 1 the absorbent units 4 be arranged so that the longitudinal directions (directions Y) of the absorbent units 4 oriented in several directions. An example of the web-like article 1 in which the absorbent units 4 are arranged so that their longitudinal directions (directions Y) are oriented in multiple directions, is a shape in which the sheet-like article 1 Has areas where multiple absorbent units 4 are arranged so that their longitudinal directions (Y directions) in the longitudinal direction (Y direction) of the web-like article 1 on both transverse sides of the web-like article 1 oriented in the longitudinal direction (Y direction) and a region in which a plurality of absorbing units 4 are arranged so that their longitudinal directions (directions Y) in the transverse direction (direction X) of the sheet-like article 1 are oriented in a central portion which is inserted between the two transverse sides. A web-like article as described above 1 in which the absorbent units 4 are arranged so that their longitudinal directions (directions Y) are oriented in a plurality of directions can be formed, for example, by both lateral sides extending in the transporting direction (direction Y1) of the base material web 20 which is transported at several positions by means of the plurality of cutting blades 111 and the pickup roll 112 and then the central portion in the direction (X1 direction) perpendicular to the transporting direction (Y1 direction) of the base material web 20 is transported at multiple positions by means of cutting rollers, which are arranged at intervals in the circumferential direction, and a take-up roll is cut.

Furthermore extend in the previously described web-like article 1 according to 1 the absorbent units 4 and the long base sections 2 on straight lines which are substantially parallel to the longitudinal direction (Y direction). Regardless of the forms that the absorbent units 4 and the long base sections 2 but it is sufficient that the absorbing units 4 and the long base sections 2 extend in the longitudinal direction (Y direction). For example, the absorbent units may 4 and the long base sections 2 so as to repeatedly form S-shapes in the longitudinal direction (Y direction) or may extend in a jagged manner in the longitudinal direction (Y direction).

In addition, the method described above for producing the web-like article has 1 according to this embodiment, as the step subsequent to the cutting step via the adhesive applying step and the water-absorbing polymer spreading step as the step subsequent to the adhesive applying step; in the case where roughening on the surface on the first side of the base material web 20 is performed, but the adhesive application step may be replaced by the Aufrauschritt. Such a roughening step may be provided as a step upstream of the cutting step. For example, in the JP 2012-092476A disclosed method or in the JP 2013-028891A disclosed methods are used as Aufrauverfahren.

1. 1. Bahnartiger Artikel für einen absorbierenden Artikel mit mehreren absorbierenden Einheiten, die jeweils aufweisen: einen langen Basisabschnitt, der eine Querrichtung, eine Längsrichtung, die länger als die Querrichtung ist, und eine Dickenrichtung hat, sowie wasserabsorbierende Polymerteilchen, die an einer Oberfläche auf einer ersten Seite des langen Basisabschnitts fixiert sind, wobei die absorbierenden Einheiten so angeordnet sind, dass die Längsrichtungen der absorbierenden Einheiten mindestens in einer Richtung orientiert sind, wobei bevor die wasserabsorbierenden Polymerteilchen Flüssigkeit absorbieren, die wasserabsorbierenden Polymerteilchen an der Oberfläche auf der ersten Seite der langen Basisabschnitte fixiert und ferner an Querseiten-Kantenabschnitten der langen Basisabschnitte fixiert sind, die sich in Längsrichtung erstrecken.
2. 2. Bahnartiger Artikel nach Absatz 1, wobei der bahnartige Artikel an beiden Enden des bahnartigen Artikels in Längsrichtung schlitzfreie Bereiche aufweist, in denen mehrere der langen Basisabschnitte in Querrichtung miteinander verbunden sind, und die wasserabsorbierenden Polymerteilchen nicht in den schlitzfreien Bereichen angeordnet sind.
3. 3. Bahnartiger Artikel nach Absatz 1 oder 2, wobei beide Enden des bahnartigen Artikels in Längsrichtung am absorbierenden Artikel fixiert sind.
4. 4. Bahnartiger Artikel nach einem der Absätze 1 bis 3, wobei in Draufsicht auf den bahnartigen Artikel die wasserabsorbierenden Polymerteilchen auf ungleichmäßig verteilte Weise fixiert sind und ein Abstand zwischen beiden Querseiten-Kantenabschnitten, die sich in Längsrichtung erstrecken, jedes der langen Basisabschnitte relativ kurz in einem Abschnitt ist, in dem ein Gewicht des pro Flächeneinheit fixierten wasserabsorbierenden Polymers relativ groß ist.
5. 5. Bahnartiger Artikel nach einem der Absätze 1 bis 4, wobei bevor die wasserabsorbierenden Polymerteilchen Flüssigkeit absorbieren, die wasserabsorbierenden Polymerteilchen auch an einer Oberfläche auf einer zweiten Seite jedes der langen Basisabschnitte fixiert sind.
6. 6. Bahnartiger Artikel nach einem der Absätze 1 bis 5, wobei kein eingefügtes Material zwischen den absorbierenden Einheiten vorhanden ist, die in Querrichtung der langen Basisabschnitte benachbart zueinander sind.
7. 7. Bahnartiger Artikel nach einem der Absätze 1 bis 6, wobei die absorbierenden Einheiten nicht in einem eingefügten Material eingehüllt sind.
8. 8. Bahnartiger Artikel nach einem der Absätze 1 bis 7, wobei die absorbierenden Einheiten jeweils in Rechteckform ausgebildet sind, die in Längsrichtung langgestreckt ist, und die absorbierenden Einheiten jeweils eine Länge Lx zwischen 0,5 mm und einschließlich 10 mm und vorzugsweise zwischen 1 mm und einschließlich 5 mm in Querrichtung haben.
9. 9. Bahnartiger Artikel nach einem der Absätze 1 bis 8, wobei die absorbierenden Einheiten jeweils eine Länge Ly in Längsrichtung haben, die zwischen dem 20-fachen und einschließlich 200-fachen und vorzugsweise zwischen dem 40-fachen und einschließlich 80-fachen einer Länge Lx jeder absorbierenden Einheit in Querrichtung liegt.
10. 10. Bahnartiger Artikel nach einem der Absätze 1 bis 9, wobei die absorbierenden Einheiten jeweils eine Länge Ly zwischen 10 mm und einschließlich 500 mm und vorzugsweise zwischen 200 mm und einschließlich 400 mm in Längsrichtung haben.
11. 11. Bahnartiger Artikel nach einem der Absätze 1 bis 10, wobei eine Größenrelation zwischen einer Breite W2 jedes der langen Basisabschnitte und einer Länge Lx jeder der absorbierenden Einheiten in Querrichtung 0 mm < (Lx - W2) < 1,4 mm und vorzugsweise 0,2 mm < (Lx - W2) < 1 mm beträgt.
12. 12. Bahnartiger Artikel nach einem der Absätze 1 bis 11, wobei der bahnartige Artikel in einem Zustand vor Gebrauch in Rechteckform ausgebildet ist, die in Längsrichtung langgestreckt ist, und der bahnartige Artikel eine Länge zwischen 100 mm und einschließlich 1000 mm in Längsrichtung sowie eine Länge zwischen 50 mm und einschließlich 300 mm in Querrichtung hat.
13. 13. Bahnartiger Artikel nach einem der Absätze 1 bis 12, wobei der bahnartige Artikel in einem Zustand vor Gebrauch einen Absorptionsbereich hat, in dem mehrere der absorbierenden Einheiten so angeordnet sind, dass sie in mindestens einer Richtung orientiert sind, und in Draufsicht auf den bahnartigen Artikel im Zustand vor Gebrauch ein Verhältnis des Absorptionsbereichs zum gesamten bahnartigen Artikel mindestens 20 % und vorzugsweise mindestens 50 % sowie höchstens 100 % und vorzugsweise höchstens 90 % beträgt.
14. 14. Bahnartiger Artikel nach einem der Absätze 1 bis 13, wobei die absorbierenden Einheiten so angeordnet sind, dass die Längsrichtungen der absorbierenden Einheiten in Längsrichtung des bahnartigen Artikels orientiert sind, und die Anzahl der absorbierenden Einheiten, die pro bahnartigen Artikel angeordnet sind, mindestens 3 und vorzugsweise mindestens 50 sowie höchstens 1000 und vorzugsweise höchstens 500 beträgt.
15. 15. Bahnartiger Artikel nach einem der Absätze 1 bis 13, wobei die absorbierenden Einheiten so angeordnet sind, dass die Längsrichtungen der absorbierenden Einheiten in Querrichtung des bahnartigen Artikels orientiert sind, und die Anzahl der absorbierenden Einheiten, die pro bahnartigen Artikel angeordnet sind, mindestens 3 und vorzugsweise mindestens 50 sowie höchstens 3500 und vorzugsweise höchstens 2000 beträgt.
16. 16. Bahnartiger Artikel nach einem der Absätze 1 bis 14, wobei im bahnartigen Artikel in einem Zustand vor Gebrauch mehrere der absorbierenden Einheiten so angeordnet sind, dass die Längsrichtungen der mehreren absorbierenden Einheiten in Längsrichtung des bahnartigen Artikels orientiert sind, und die mehreren absorbierenden Einheiten so angeordnet sind, dass sie einander nicht schneiden.
17. 17. Bahnartiger Artikel nach einem der Absätze 1 bis 16, wobei der bahnartige Artikel an beiden Enden des bahnartigen Artikels in Längsrichtung schlitzfreie Bereiche aufweist, in denen mehrere der langen Basisabschnitte in Querrichtung miteinander verbunden sind, und bei Verwendung des bahnartigen Artikels für einen absorbierenden Artikel die beiden Enden des bahnartigen Artikels in Längsrichtung am absorbierenden Artikel fixiert sind.
18. 18. Bahnartiger Artikel nach einem der Absätze 1 bis 17, wobei ein Verhältnis einer Breite W2 jedes der langen Basisabschnitte zu einer Breite W1 des bahnartigen Artikels mindestens 0,001 und vorzugsweise mindestens 0,002 sowie höchstens 0,200 und vorzugsweise höchstens 0,040 beträgt.
19. 19. Bahnartiger Artikel nach einem der Absätze 1 bis 18, wobei die langen Basisabschnitte jeweils eine Breite W2 von mindestens 0,3 mm und vorzugsweise mindestens 0,6 mm sowie höchstens 10 mm, vorzugsweise höchstens 2,0 mm und stärker bevorzugt höchstens 1,8 mm sowie insbesondere vorzugsweise zwischen 0,3 mm und einschließlich 10 mm haben.
20. 20. Bahnartiger Artikel nach einem der Absätze 1 bis 19, wobei die langen Basisabschnitte, die die jeweiligen absorbierenden Einheiten bilden, aus einer hydrophilen Bahn gebildet sind.
21. 21. Bahnartiger Artikel nach einem der Absätze 1 bis 20, wobei die langen Basisabschnitte, die die jeweiligen absorbierenden Einheiten bilden, aus einem Vliesstoff gebildet sind.
22. 22. Bahnartiger Artikel nach einem der Absätze 1 bis 21, wobei die wasserabsorbierenden Polymerteilchen des bahnartigen Artikels auf den langen Basisabschnitten über einen Kleber fixiert sind.
23. 23. Bahnartiger Artikel nach einem der Absätze 1 bis 22, wobei bei Gebrauch des bahnartigen Artikels für einen absorbierenden Artikel, nachdem die wasserabsorbierenden Polymerteilchen, die an den Querseiten-Kantenabschnitten, die sich in Längsrichtung erstrecken, der langen Basisabschnitte fixiert sind, als Ergebnis von Absorbieren einer Flüssigkeit aufgequollen sind, sich eine Position jedes der langen Basisabschnitte in Dickenrichtung von der Position dieses langen Basisabschnitts vor Absorbieren der Flüssigkeit unterscheidet.
24. 24. Bahnartiger Artikel nach einem der Absätze 1 bis 23, wobei sich im bahnartigen Artikel in einem Zustand nach Quellen Positionen der langen Basisabschnitte, die die absorbierenden Einheiten bilden, die benachbart zueinander sind, in Dickenrichtung voneinander unterscheiden.
25. 25. Bahnartiger Artikel nach einem der Absätze 1 bis 24, wobei ein Abstand zwischen beiden Querseiten-Kantenabschnitten, die sich in Längsrichtung erstrecken, jedes der langen Basisabschnitte größer als ein mittlerer Teilchendurchmesser der wasserabsorbierenden Polymerteilchen vor Quellen und kleiner als der mittlere Teilchendurchmesser der wasserabsorbierenden Polymerteilchen nach Quellen ist.
26. 26. Absorbierendes Teil für einen absorbierenden Artikel, das aufweist:
    • den bahnartigen Artikel nach einem der Absätze 1 bis 25; und
    • eine flüssigkeitsdurchlässige Kernhüllbahn, die den bahnartigen Artikel abdeckt.
27. 27. Absorbierender Artikel, der aufweist:
    • das absorbierende Teil nach Absatz 26;
    • eine Oberseitenbahn, die auf einer zur Haut weisenden Oberflächenseite des absorbierenden Teils angeordnet ist; und
    • eine Rückseitenbahn, die auf einer nicht zur Haut weisenden Oberflächenseite des absorbierenden Teils angeordnet ist.
28. 28. Verfahren zur Herstellung eines bahnartigen Artikels für einen absorbierenden Artikel, wobei der bahnartige Artikel mehrere absorbierende Einheiten aufweist, die jeweils aufweisen: einen langen Basisabschnitt, der eine Querrichtung, eine Längsrichtung, die länger als die Querrichtung ist, und eine Dickenrichtung hat, sowie wasserabsorbierende Polymerteilchen, die an einer Oberfläche auf einer ersten Seite des langen Basisabschnitts fixiert sind, wobei die absorbierenden Einheiten so angeordnet sind, dass die Längsrichtungen der absorbierenden Einheiten mindestens in einer Richtung orientiert sind, wobei bevor die wasserabsorbierenden Polymerteilchen Flüssigkeit absorbieren, die wasserabsorbierenden Polymerteilchen an der Oberfläche auf der ersten Seite der langen Basisabschnitte fixiert und ferner an Querseiten-Kantenabschnitten jedes der langen Basisabschnitte fixiert sind, die sich in Längsrichtung erstrecken. wobei das Verfahren aufweist: einen Schneidschritt des Schneidens einer Basismaterialbahn, um mehrere der langen Basisabschnitte zu bilden; einen Verbreiterungsschritt eines Verbreiterungsabschnitts, der einen Abstand zwischen den langen Basisabschnitten, die benachbart zueinander sind, der mehreren langen Basisabschnitte verbreitert, die im Schneidschritt gebildet wurden; und einen wasserabsorbierende Polymerteilchen verteilenden Schritt des Verteilens der wasserabsorbierenden Polymerteilchen auf den mehreren langen Basisabschnitten, bei denen der Abstand zwischen den langen Basisabschnitten, die benachbart zueinander sind, im Verbreiterungsschritt verbreitert wurde.
29. 29. Verfahren zur Herstellung eines bahnartigen Artikels nach Absatz 28, das aufweist: einen Kleberauftragsschritt des Auftragens eines Klebers als Schritt, der dem wasserabsorbierende Polymerteilchen verteilenden Schritt vorgelagert ist.
30. 30. Verfahren zur Herstellung eines bahnartigen Artikels nach Absatz 29, das aufweist: den Verbreiterungsschritt als dem Schneidschritt nachgelagerter Schritt, den Kleberauftragsschritt als dem Verbreiterungsschritt nachgelagerter Schritt und den wasserabsorbierende Polymerteilchen verteilenden Schritt als dem Kleberauftragsschritt nachgelagerter Schritt,

wobei im Kleberauftragsschritt der Kleber von oberhalb der Oberflächen auf der ersten Seite der mehreren langen Basisabschnitte aufgetragen wird, bei denen der Abstand zwischen den langen Basisabschnitten, die benachbart zueinander sind, im Verbreiterungsschritt verbreitert wurde, um dadurch den Kleber auf die erste Seite und die Querseiten-Kantenabschnitte jedes der langen Basisabschnitte aufzutragen; und im wasserabsorbierende Polymerteilchen verteilenden Schritt die wasserabsorbierenden Polymerteilchen von oberhalb der Oberflächen auf der ersten Seite der mehreren langen Basisabschnitte verteilt werden, um dadurch den bahnartigen Artikel zu bilden, in dem die wasserabsorbierenden Polymerteilchen an den Querseiten-Kantenabschnitten der langen Basisabschnitte über den Kleber fixiert sind.With respect to the above embodiments, the following sheet-like articles are further disclosed.

1. A web-like article for an absorbent article having a plurality of absorbent units, each comprising: a long base portion having a transverse direction, a longitudinal direction that is longer than the transverse direction, and a thickness direction, and water-absorbent polymer particles attached to a surface thereof fixed to the first side of the long base portion, wherein the absorbent units are arranged so that the longitudinal directions of the absorbent units are oriented in at least one direction, wherein before the water-absorbing polymer particles absorb liquid, the water-absorbent polymer particles on the surface on the first side of the long base portions fixed and further fixed to lateral side edge portions of the long base portions extending in the longitudinal direction.
2. 2. Track-like article according to paragraph 1 wherein the web-like article has longitudinally slit-free regions at both ends of the web-like article, in which a plurality of the long base sections in Transversely connected to each other, and the water-absorbing polymer particles are not arranged in the slot-free areas.
3. 3. Track-like article according to paragraph 1 or 2 wherein both ends of the sheet-like article are longitudinally fixed to the absorbent article.
4. 4. Web-like article according to one of the paragraphs 1 to 3 wherein, in plan view of the sheet-like article, the water-absorbent polymer particles are fixed in an unevenly distributed manner, and a distance between both transverse-side edge portions extending in the longitudinal direction of each of the long base portions is relatively short in a portion in which a weight of the unit per unit area fixed water-absorbing polymer is relatively large.
5. 5. Track-like article according to one of the paragraphs 1 to 4 wherein, before the water-absorbing polymer particles absorb liquid, the water-absorbent polymer particles are also fixed to a surface on a second side of each of the long base sections.
6. 6. Track-like article according to one of the paragraphs 1 to 5 wherein there is no interposed material between the absorbent units adjacent to each other in the transverse direction of the long base portions.
7. 7. Track-like article according to one of the paragraphs 1 to 6 wherein the absorbent units are not wrapped in an inserted material.
8. 8. Web-like article according to one of the paragraphs 1 to 7 wherein the absorbent units are each formed in a rectangular shape elongated in the longitudinal direction and the absorbent units each have a length Lx of between 0.5 mm and 10 mm inclusive and preferably between 1 mm and 5 mm inclusive in the transverse direction.
9. 9. Web-like article according to one of the paragraphs 1 to 8th wherein the absorbent units each have a length L in the longitudinal direction which is between 20 and 200 times and preferably between 40 and 80 times a length L x of each absorbent unit in the transverse direction.
10. 10. Track-like article according to one of the paragraphs 1 to 9 , wherein the absorbent units each have a length Ly between 10 mm and 500 mm inclusive and preferably between 200 mm and 400 mm inclusive in the longitudinal direction.
11. 11. Web-like article according to one of the paragraphs 1 to 10 wherein a size relation between a width W2 of each of the long base portions and a length Lx of each of the absorbing units in the transverse direction is 0 mm <(Lx - W2) <1.4 mm, and preferably 0.2 mm <(Lx - W2) <1 mm is.
12. 12. Web-like article according to one of the paragraphs 1 to 11 wherein the sheet-like article is formed in a pre-use state in a rectangular shape elongated in the longitudinal direction, and the web-like article has a length between 100 mm and 1000 mm inclusive in the longitudinal direction and a length between 50 mm and 300 mm inclusive in the transverse direction.
13. 13. Web-like article according to one of the paragraphs 1 to 12 wherein the sheet-like article in a pre-use state has an absorption region in which a plurality of the absorbent units are oriented so as to be oriented in at least one direction, and in plan view of the web-like article before use, a ratio of the absorption region to the whole web-like article is at least 20% and preferably at least 50% and at most 100% and preferably at most 90%.
14. 14. Web-like article according to one of the paragraphs 1 to 13 wherein the absorbent units are arranged so that the longitudinal directions of the absorbent units are oriented longitudinally of the web-like article, and the number of absorbent units disposed per web-like article is at least 3 and preferably at least 50 and at most 1000 and preferably at most 500 is.
15. 15. Track-like article according to one of the paragraphs 1 to 13 wherein the absorbent units are arranged so that the longitudinal directions of the absorbent units are oriented transversely of the web-like article, and the number of absorbent units disposed per web-like article is at least 3 and preferably at least 50 and at most 3500 and preferably at most 2000 is.
16. 16. Web-like article according to one of the paragraphs 1 to 14 wherein, in the sheet-like article in a pre-use state, a plurality of the absorbent units are arranged so that the longitudinal directions of the plurality of absorbent units are oriented in the longitudinal direction of the sheet-like article, and the plurality of absorbent units are arranged so as not to intersect each other.
17. 17. Web-like article according to one of the paragraphs 1 to 16 wherein the web-like article has longitudinally slit-free regions at both ends of the web-like article in which a plurality of the long base sections are transversely connected, and when using the web-like article for an absorbent article, the two ends of the web-like article are longitudinally attached to the absorbent article are fixed.
18. 18. Track-like article according to one of the paragraphs 1 to 17 wherein a ratio of a width W2 of each of the long base portions to a width W1 of the sheet-like article is at least 0.001 and preferably at least 0.002 and at most 0.200 and preferably at most 0.040.
19. 19. Web-like article according to one of the paragraphs 1 to 18 wherein the long base portions each have a width W2 of at least 0.3 mm and preferably at least 0.6 mm and at most 10 mm, preferably at most 2.0 mm and more preferably at most 1.8 mm and in particular preferably between 0.3 mm and including 10 mm.
20. 20. Track-like article according to one of the paragraphs 1 to 19 wherein the long base portions forming the respective absorbent units are formed of a hydrophilic sheet.
21. 21. Web-like article according to one of the paragraphs 1 to 20 wherein the long base portions forming the respective absorbent units are formed of a nonwoven fabric.
22. 22. Web-like article according to one of the paragraphs 1 to 21 wherein the water-absorbing polymer particles of the sheet-like article are fixed on the long base portions via an adhesive.
23. 23. Track-like article according to one of the paragraphs 1 to 22 wherein, in use of the web-like article for an absorbent article, after the water-absorbent polymer particles fixed to the transverse side edge portions extending in the longitudinal direction of the long base sections are swollen as a result of absorbing a liquid, a position of each of them long base portions in the thickness direction from the position of this long base portion before absorbing the liquid is different.
24. 24. Track-like article according to one of the paragraphs 1 to 23 wherein, in the sheet-like article, in a state of swelling, positions of the long base portions constituting the absorbing units adjacent to each other differ in the thickness direction from each other.
25. 25. Track-like article according to one of the paragraphs 1 to 24 wherein a distance between both lateral side edge portions extending in the longitudinal direction of each of the long base portions is larger than a mean particle diameter of the water-absorbent polymer particles before swelling and smaller than the average particle diameter of the water-absorbent polymer particles after swelling.
26. 26. Absorbent member for an absorbent article, comprising:
    • the web-like article after one of the paragraphs 1 to 25 ; and
    • a liquid-permeable core wrapping sheet covering the sheet-like article.
27. 27. Absorbent article comprising:
    • the absorbent part according to paragraph 26 ;
    • a top sheet disposed on a skin facing surface side of the absorbent member; and
    • a backsheet disposed on a non-skin facing surface side of the absorbent member.
28. 28. A method of producing a web-like article for an absorbent article, the web-like article comprising a plurality of absorbent units, each comprising: a long base section having a transverse direction, a longitudinal direction that is longer than the transverse direction, and a thickness direction; water-absorbent polymer particles fixed to a surface on a first side of the long base portion, the absorbent units being arranged so that the longitudinal directions of the absorbent units are oriented in at least one direction, wherein before the water-absorbing polymer particles absorb liquid, the water-absorbent polymer particles are fixed to the surface on the first side of the long base portions and further fixed to lateral side edge portions of each of the long base portions extending in the longitudinal direction. the method comprising: a cutting step of cutting a base material web to form a plurality of the long base portions; a widening portion of a widening portion widening a distance between the long base portions adjacent to each other of the plurality of long base portions formed in the cutting step; and a water-absorbing polymer particle spreading step of spreading the water-absorbent polymer particles on the plural long base portions in which the distance between the long base portions adjacent to each other has been widened in the widening step.
29. 29. Method of producing a web-like article according to paragraph 28 comprising: an adhesive applying step of applying an adhesive as a step preceding the water-absorbent polymer particle distributing step.
30. 30. Method for producing a web-like article according to paragraph 29 comprising: the widening step as the step subsequent to the cutting step, the adhesive applying step as the step subsequent to the widening step, and the step dispersing the water absorbent polymer particle as the step subsequent to the adhesive applying step;

wherein, in the adhesive application step, the adhesive is applied from above the surfaces on the first side of the plurality of long base portions where the distance between the long base portions adjacent to each other has been widened in the widening step to thereby transfer the adhesive to the first side and the lateral sides Edge portions of each of the long base portions to apply; and in the water-absorbent polymer particle spreading step, the water-absorbent polymer particles are spread from above the surfaces on the first side of the plurality of long base portions to thereby form the sheet-like article in which the water-absorbent polymer particles are fixed to the lateral-side edge portions of the long base portions via the adhesive ,

Industrial Applicability

According to the present invention, there is provided a sheet-like article which makes it unlikely that sources are obstructed and allows the water-absorbent polymer to exhibit the maximum absorption performance. In addition, according to the present invention, there is provided a method of producing a sheet-like article by which such a sheet-like article can be efficiently produced.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• JP 2002224162 A [0006]
• JP 2015042244 A [0006]
• JP 63018122 U [0006]
• JP 2003235889A [0069, 0070]
• JP 2003 [0070]
• JP 235889A [0070]
• JP 2012092476A [0079]
• JP 2013028891 A [0079]

Claims (30)

A web-like article for a multiple absorbent unit absorbent article, each absorbent unit comprising: a long base portion having a transverse direction, a longitudinal direction that is longer than the transverse direction, and a thickness direction; and Water-absorbing polymer particles attached to a surface on a fixed to the first side of the long base portion, wherein the absorbent units are arranged so that the longitudinal direction of the absorbent unit is oriented in at least one direction, wherein before the water-absorbing polymer particles absorb liquid, the water-absorbent polymer particles on the surface on the first side of the long base portions fixed and further fixed to lateral side edge portions of each long base portion extending in the longitudinal direction. Track-like article after Claim 1 wherein the sheet-like article has slit-free portions at both ends of the sheet-like article in the longitudinal direction in which a plurality of the long base portions are transversely connected, and the water-absorbent polymer particles are not disposed in the slit-free portions. Track-like article after Claim 1 or 2 wherein both ends of the sheet-like article are longitudinally fixed to the absorbent article. Web-like article after one of the Claims 1 to 3 wherein, in plan view of the sheet-like article, the water-absorbent polymer particles are fixed in an unevenly distributed manner, and a distance between both transverse-side edge portions extending in the longitudinal direction of each of the long base portions is relatively short in a portion in which a weight of the unit per unit area fixed water-absorbing polymer is relatively large. Web-like article after one of the Claims 1 to 4 wherein, before the water-absorbing polymer particles absorb liquid, the water-absorbent polymer particles are also fixed to a surface on a second side of each of the long base sections. Web-like article after one of the Claims 1 to 5 wherein there is no interposed material between the absorbent units adjacent to each other in the transverse direction of the long base portions. Web-like article after one of the Claims 1 to 6 wherein the absorbent units are not wrapped in an inserted material. Web-like article after one of the Claims 1 to 7 wherein the absorbent units are each formed in a rectangular shape elongated in the longitudinal direction, and the absorbent units each have a length Lx between 0.5 mm and 10 mm inclusive in the transverse direction. Web-like article after one of the Claims 1 to 8th wherein the absorbent units each have a length L in the longitudinal direction that is between 20 and 200 times a length Lx of each absorbent unit in the transverse direction. Web-like article after one of the Claims 1 to 9 , wherein the absorbent units each have a length Ly between 10 mm and 500 mm inclusive longitudinally. Web-like article after one of the Claims 1 to 10 wherein a size relation between a width W2 of each of the long base portions and a length Lx of each of the absorbing units in the transverse direction is 0 mm <(Lx - W2) <1.4 mm. Web-like article after one of the Claims 1 to 11 wherein the sheet-like article is formed in a pre-use state in a rectangular shape elongated in the longitudinal direction, and the web-like article has a length between 100 mm and 1000 mm inclusive in the longitudinal direction and a length between 50 mm and 300 mm inclusive in the transverse direction. Web-like article after one of the Claims 1 to 12 wherein the sheet-like article in a pre-use state has an absorption region in which a plurality of the absorbent units are oriented so as to be oriented in at least one direction, and in plan view of the web-like article before use, a ratio of the absorption region to the whole web-type article is between 20% and 100% inclusive. Web-like article after one of the Claims 1 to 13 wherein the absorbent units are arranged so that the longitudinal directions of the absorbent units are oriented longitudinally of the web-like article, and the number of absorbent units disposed per web-like article is between 3 and 1000 inclusive. Web-like article after one of the Claims 1 to 13 wherein the absorbent units are arranged so that the longitudinal directions of the absorbent units are oriented transversely of the web-like article, and the number of absorbent units disposed per web-like article is between 3 and 3500 inclusive. Web-like article after one of the Claims 1 to 14 wherein, in the sheet-like article in a pre-use state, a plurality of the absorbent units are arranged so that the longitudinal directions of the plurality of absorbent units are oriented in the longitudinal direction of the sheet-like article, and the plurality of absorbent units are arranged so as not to intersect each other. Web-like article after one of the Claims 1 to 16 wherein the web-like article has longitudinally slit-free regions at both ends of the web-like article in which a plurality of the long base sections are transversely connected, and when using the web-like article for an absorbent article, the two ends of the web-like article are longitudinally attached to the absorbent article are fixed. Web-like article after one of the Claims 1 to 17 wherein a ratio of a width W2 of each of the long base portions to a width W1 of the sheet-like article is between 0.001 and 0.200 inclusive. Web-like article after one of the Claims 1 to 18 , wherein the long base sections each have a width W2 between 0.3 mm and 10 mm inclusive. Web-like article after one of the Claims 1 to 19 wherein the long base portions forming the respective absorbent units are formed of a hydrophilic sheet. Web-like article after one of the Claims 1 to 20 wherein the long base portions forming the respective absorbent units are formed of a nonwoven fabric. Web-like article after one of the Claims 1 to 21 wherein the water-absorbing polymer particles of the sheet-like article are fixed on the long base portions via an adhesive. Web-like article after one of the Claims 1 to 22 wherein, in use of the web-like article for an absorbent article, after the water-absorbent polymer particles fixed to the transverse-side edge portions extending in the longitudinal direction of the long base portions are swollen as a result of absorbing a liquid, a position of each of them long base portions in the thickness direction from the position of this long base portion before absorbing the liquid is different. Web-like article after one of the Claims 1 to 23 wherein, in the sheet-like article, in a state of swelling, positions of the long base portions constituting the absorbing units adjacent to each other differ in the thickness direction from each other. Web-like article after one of the Claims 1 to 24 wherein a distance between both lateral side edge portions extending in the longitudinal direction of each of the long base portions is larger than a mean particle diameter of the water-absorbent polymer particles before swelling and smaller than the average particle diameter of the water-absorbent polymer particles after swelling. An absorbent article absorbent article comprising: the sheet article of any one of Claims 1 to 25 ; and a liquid-permeable core wrapping sheet covering the sheet-like article. Absorbent article comprising: the absorbent part after Claim 26 ; a top sheet disposed on a skin facing surface side of the absorbent member; and a backsheet disposed on a non-skin facing surface side of the absorbent member. A method of producing a web-like article for an absorbent article, the web-like article comprising a plurality of absorbent units, each comprising: a long base section having a transverse direction, a longitudinal direction that is longer than the transverse direction, and a thickness direction, and water-absorbent polymer particles which are fixed to a surface on a first side of the long base portion, wherein the absorbent units are arranged so that the longitudinal directions of the absorbent units are oriented in at least one direction, and before the water-absorbing polymer particles absorb liquid, the water-absorbent polymer particles on the surface fixed on the first side of the long base portions and further fixed to lateral side edge portions of the long base portions extending in the longitudinal direction, the method comprising: a cutting step of cutting a Base material web to form a plurality of the long base portions; a widening portion of a widening portion widening a distance between the long base portions adjacent to each other of the plurality of long base portions formed in the cutting step; and a water-absorbing polymer particle spreading step of spreading the water-absorbent polymer particles on the plural long base portions in which the distance between the long base portions adjacent to each other has been widened in the widening step. Method for producing a web-like article according to Claim 28 comprising: an adhesive applying step of applying an adhesive as a step preceding the water-absorbent polymer particle distributing step. Method for producing a web-like article according to Claim 29 comprising: the widening step as the step subsequent to the cutting step, the adhesive applying step as the widening step, and the water absorbing polymer particle spreading step as the adhesive applying step, wherein in the adhesive applying step, the adhesive is applied from above the surfaces on the first side of the plurality of long base portions wherein the distance between the long base portions adjacent to each other has been widened in the widening step to thereby apply the adhesive to the first side and the lateral side edge portions of each of the long base portions; and in the water-absorbent polymer particle spreading step, the water-absorbent polymer particles are spread from above the surfaces on the first side of the plurality of long base portions to thereby form the sheet-like article in which the water-absorbent polymer particles are fixed to the lateral-side edge portions of the long base portions via the adhesive ,

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