JP4996507B2 - Absorbent articles - Google Patents

Description

  The present invention absorbs a tape-type disposable diaper, a pants-type disposable diaper, a urine collecting pad, and the like having a pair of three-dimensional gathers arranged on both sides of the absorbent body for the purpose of preventing the side leakage of the wearer's excrement. It relates to a property article.

  In general, absorbent articles such as a tape-type disposable diaper, a pants-type disposable diaper, and a urine collecting pad are sometimes provided with three-dimensional gathers on both sides of the absorbent body (see, for example, Patent Documents 1 and 2).

  For example, the absorbent article 100 </ b> A illustrated in FIG. 2 is a tape-type disposable diaper including a pair of three-dimensional gathers 26 disposed on both sides of the absorbent body 22. The three-dimensional gather 26 is configured to be able to stand up three-dimensionally by the contraction force of the three-dimensional gather stretchable material 36 disposed in the vicinity of the free end E1, and the excrement of the wearer leaks from the side edge side of the absorber. It has an effect as a leak-proof wall that prevents (so-called side leakage).

  In addition to functioning as a leak-proof wall as described above, the three-dimensional gather may use the space formed by the three-dimensional gather as a pocket for fixing the urine collecting pad.

  A urine absorption pad (also referred to as an inner pad or an auxiliary pad) is an absorbent pad for an insole used together with a disposable diaper, and is usually used in a state of being placed on a top sheet of a disposable diaper. Therefore, the urine absorbing pad is fixed so as to be sandwiched between a pair of three-dimensional gathers arranged on both sides of the absorber.

  For example, as in the absorbent article 100B shown in FIG. 3, the gather sheet 50 forming the three-dimensional gather 26 has a locus 52 of a fixing portion with the top sheet 18 on the front body 2 side and the back body 6 side outward in the width direction. A tape-type disposable diaper in which a pocket 54 is formed between the top sheet 18 and the gather sheet 50 by being attached to the top sheet 18 so as to be curved has been proposed (see, for example, Patent Document 3). .

  In addition, a disposable diaper in which a pocket is formed between the top sheet and the three-dimensional gather has been proposed by pasting the inner surface of the three-dimensional gather from the crotch part to the back body side to the top sheet. (For example, see Patent Document 4).

  Similarly, for example, like an absorbent article 100C shown in FIG. 4, a portion corresponding to the crotch portion 4 of the diaper on the inner surface of the three-dimensional gather 26 is fixed to the top sheet 18 (fixing portion 70). A tape-type disposable diaper in which a pocket 72 is formed between the top sheet 18 and the three-dimensional gather 26 has also been proposed (see, for example, Patent Document 5).

JP 2000-262555 A JP 2002-656 A Japanese Patent No. 3669974 Japanese Patent No. 3418279 JP 2005-160843 A

  As described above, the attachment of a three-dimensional gather is effective in preventing the side leakage of excrement. However, depending on the wearer's body shape and posture, there is a problem that the side leakage prevention effect may not be sufficiently obtained.

  In the case where the space formed by the three-dimensional gather is used as a pocket for fixing the urine collecting pad, even if the disposable diaper described in Patent Documents 3 to 5, It is difficult to fix and the problem that the urine collecting pad is likely to be displaced remains. That is, the urine collection pad includes a small rectangular pad that is narrower than the crotch part of the diaper, an hourglass-type large pad having wide ears on the front body side and the back body side of the diaper, and the like. Each person has a slightly different size and shape. Therefore, it is difficult to securely fix these various urine removing pads, and it has been difficult to effectively prevent the urine collecting pads from being displaced, and thus urine leakage accompanying the displacement.

  The present invention has been made to solve the above-described problems of the prior art, and can sufficiently obtain a three-dimensional gather leakage-proof effect regardless of the wearer's body shape and posture. It is an object of the present invention to provide an absorbent article capable of reliably fixing a urine absorbing pad having a slightly different size and shape for each manufacturer up to a large pad.

  As a result of intensive studies to solve the above-described problems of the prior art, the present inventor has found that the conventional absorbent article has a three-dimensional gather height and width (if the urine removing pad is fixed, the pocket Due to the fact that the width and depth are determined in advance, the shape and posture of the wearer or the shape flexibility of various urine-removing pads are low. It has been found that the fixation of is also insufficient. Then, a part of the surface of the three-dimensional gather is temporarily fixed to the surface of the top sheet so as to be peelable, and only a desired portion is peeled off according to the size and shape of the urine collecting pad so that the width and depth of the pocket are appropriately adjusted. The present invention has been completed by conceiving that the above-mentioned problems can be solved by adopting an adjustable structure. Specifically, the following absorbent articles are provided by the present invention.

[1] An absorber, a top sheet that is at least partially made of a liquid-permeable material and arranged to cover the surface of the absorber, and a liquid-impermeable material that covers the back surface of the absorber And a pair of three-dimensional gathers arranged on both sides of the absorbent body, and a part of the surface of the three-dimensional gather is heat embossed or ultrasonically welded. a plurality of temporary fixing portion formed by being releasably tacking to at least one surface of the surfaces and the standing gathers itself of the surface of said topsheet, said plurality of temporary fixing portions, wherein the three-dimensional It is arranged intermittently in the length direction of the gathers, and the width of the pocket formed between the three-dimensional gathers and the top sheet is set according to the number of peeling of the temporary fixing portions. Absorbent article that can be adjusted on a floor basis .

[ 2 ] The plurality of temporary fixing portions are arranged on the central side in the longitudinal direction of the three-dimensional gathers rather than the peel strength of the temporary fixing portions arranged on the front end side and the rear end side of the three-dimensional gathers. The absorbent article according to [ 1 ], wherein the peel strength is low.

[ 3 ] A part of the surface of the three-dimensional gather is temporarily fixed to at least one of the surface of the top sheet and the surface of the three-dimensional gather itself by a plurality of temporary fixing portions. The absorbent article according to [1] or [2] , wherein the temporary fixing portions are intermittently arranged in a height direction of the three-dimensional gather.

[ 4 ] The plurality of temporary fixing portions have lower peeling strength of the temporary fixing portions arranged on the free end side of the three-dimensional gather than the peeling strength of the temporary fixing portions arranged on the fixed end side of the three-dimensional gather. The absorbent article according to the above [ 3 ].

[ 5 ] Among the surfaces of the three-dimensional gather, the front end side and the rear end side of the three-dimensional gather are temporarily fixed, and the longitudinal central portion of the three-dimensional gather is in a non-fixed state with respect to the surface of the top sheet. The absorbent article according to any one of [1] to [ 4 ].

[ 6 ] Of the surface of the three-dimensional gather, the front end side and the rear end side of the three-dimensional gather are temporarily fixed, and the longitudinal center portion of the three-dimensional gather is fixed to the surface of the top sheet. The absorbent article according to any one of [1] to [ 4 ].

  The absorbent article of the present invention can sufficiently obtain a three-dimensional gather leak-proof effect regardless of the wearer's body shape and posture, and the size and shape of each manufacturer vary from small pads to large pads. It is possible to securely fix different urine collecting pads.

  Hereinafter, the best mode for carrying out the absorbent article of the present invention will be specifically described with reference to an example of a tape-type disposable diaper. However, the present invention broadly encompasses absorbent articles having the invention specific items, and is not limited to the following embodiments.

  The "front body" is the part that covers the abdomen (front of the body) of the wearer when a diaper is worn on the wearer, and the "inseam" is the wearer that wears the diaper on the wearer. The part covering the inseam of the wearer, “rear body”, means a part covering the wearer's back side (back of the body) when the wearer wears a diaper.

[1] Absorbent article of the present invention:
The absorbent article 1A shown in FIGS . 1A to 1C is made of a water-repellent sheet and includes a pair of three-dimensional gathers 26A arranged on both sides of the absorbent body 22, and a part of the surface S1 of the three-dimensional gather 26A is the top sheet 18. is temporarily fixed separably to at least one surface of the surface and the standing gathers 26A itself surface (in the figure, reference numeral 28 indicates a temporary fixing portion.).

  By temporarily fixing a part of the surface of the three-dimensional gather 26A to at least one of the surface of the top sheet 18 and the surface of the three-dimensional gather 26A itself, as shown in FIG. The part 28 is not peeled off, and as shown in FIG. 1D, a part of the temporary fixing part 28 is peeled off, and further, the temporary fixing part 28 is completely peeled off as shown in FIG. 1E. be able to.

  Therefore, the height and rising position (standing line L1) of the three-dimensional gather 26A can be customized to a shape most suitable for the wearer's posture and body shape. Accordingly, the three-dimensional gather can be accurately fitted to the skin of each wearer, and a high leakage prevention effect can be obtained.

  Further, a part or all of the temporary fixing portion 28 is peeled off so as to match the size and shape of the urine absorbing pad, and the width and depth of the pocket can be adjusted as appropriate.

  For example, when a small pad is used, the temporary fixing portion near the crotch is peeled off according to the width of the small pad. When a large pad is used, the front body and the body are adjusted according to the width of the ear portion of the pad. The usage method of peeling off the temporary fixing part in the vicinity of the back body becomes possible. In addition, even if the size and shape of the urine collection pad differ slightly from manufacturer to manufacturer, the urine collection pad can be securely fixed because of the high degree of freedom in the shape of the pockets formed. Is unlikely to occur.

[1-1] Solid gathering:
The absorbent article of the present invention comprises a water-repellent sheet and includes at least a pair of three-dimensional gathers arranged on both sides of the absorbent body.

  The three-dimensional gather is a member for preventing side leakage of the urine excreted by the wearer, and is a leak-proof wall configured to stand up three-dimensionally. By forming such a three-dimensional gather, the three-dimensional gather serves as a breakwater, and leakage from a leg-diameter opening or the like (so-called “lateral leakage”) can be effectively prevented.

  The structure of a three-dimensional gather can employ | adopt the structure used for the conventional disposable diaper and other absorbent articles. For example, a stretchable material (a three-dimensional gathered stretchable material) disposed on a part of the water-repellent sheet material and a sheet (gather) formed on the sheet material by the three-dimensional gathered stretchable material can be suitably used.

  The three-dimensional gather can be formed by separately attaching a water-repellent sheet for three-dimensional gather. In this method, a water-repellent sheet that is separate from the diaper component sheet may be bonded to the part where the gather is to be disposed (for example, only the crotch part of the diaper). Therefore, less sheet material is used. In addition, it is easy to form a three-dimensional gather according to the application, such as using a sheet material in which a liquid-impervious sheet is sandwiched between two water-repellent sheets to improve the leakage prevention effect.

  Moreover, you may form a three-dimensional gather with a part of other sheet | seat material which comprises an absorbent article. For example, the absorbent article 1A shown in FIG. 1A is an example in which a three-dimensional gather 26A is formed by folding back a side sheet 18b made of a water-repellent sheet. The three-dimensional gather and the side sheet are preferably water-repellent nonwoven fabrics in terms of functionality. Therefore, it is possible to simplify the manufacturing process and to avoid waste of product raw materials when both members are integrally formed than when different members are bonded together.

  The water-repellent sheet forming the three-dimensional gathers is preferably a non-woven sheet manufactured by a method such as card embossing, spunbonding, SMS, or SMMS, regardless of whether it is separately attached or formed by folding other constituent sheets of the diaper. Can be used. Among these, nonwoven fabric sheets such as SMS and SMMS having high waterproof properties are more preferable.

  As for the absorbent article of this invention, the surface of the three-dimensional gather is temporarily fixed so that peeling is possible. “Temporarily fixed so that it can be peeled off” means that the material such as the top sheet that has been temporarily fixed when it is peeled torn to the extent that it can be easily peeled off by human force, It means that it is fixed to such an extent that it does not occur.

  Specifically, it is preferable that the 180 ° peel peel force measured in accordance with JISK6854 is fixed in the range of 0.3 to 5.0 N. When the peeling force is less than 0.3 N, the adhesive force is too weak, and even when a diaper is worn, the peeling may occur unintentionally even in a scene that does not require peeling. Moreover, when the peeling force exceeds 5.0 N, the adhesive force is too strong, and the temporary fixing portion cannot be easily peeled off, which may cause an unnecessarily heavy burden when changing diapers. In order to acquire the said effect more reliably, it is more preferable that peeling force is the range of 0.5-3.0N.

In the absorbent article of the present invention, the temporary fixing portion is formed by hot embossing or ultrasonic welding . That is, examples of the temporary fixing method include extremely weak welding or pressure bonding methods.

  In the absorbent article of the present invention, the “surface” of the three-dimensional gather is temporarily fixed. “Surface” includes both inner and outer surfaces. As shown in FIG. 1B, the “inner surface” means a surface that is oriented to the center side in the width direction of the absorbent article 1A when the three-dimensional gather 26A is erected (reference numeral S1 in the figure). On the other hand, the “outer surface” means a surface that is oriented toward the nearest side edge 6a (6b) of the absorbent article 1A when the three-dimensional gather 26A stands (reference numeral S2 in the figure).

  In the absorbent article of the present invention, a “part” of the surface of the three-dimensional gather is temporarily fixed. For example, a three-dimensional inverted gather is fixed so that the end in the front-rear direction of the absorbent article and the edge near the absorbent article side edge are not easily peeled off, and the surface of the three-dimensional gather and the top sheet A pocket that opens to the center side of the absorbent article is formed by the surface and these fixing portions. Therefore, in the present invention, all or a part of the surface of the three-dimensional gather other than the fixing portion can be temporarily fixed according to the purpose.

  Furthermore, in the absorbent article of the present invention, a part of the surface of the three-dimensional gather is temporarily fixed so as to be peelable from at least one of a) the surface of the top sheet and b) the surface of the three-dimensional gather itself. Has been. For example, in the case of a three-dimensional gather that has a folded portion in the middle of the gather height, such as outside-inside gathers and inside-outside gathers described below, temporarily fix the surfaces of the three-dimensional gathers together. In addition, the same effect as that obtained by temporarily fixing the surface of the top sheet can be obtained.

The absorbent article of the present invention is a further improvement of an absorbent article having a peelable temporary fixing portion 28, such as the absorbent article 1A shown in FIGS. 1A to 1F. Specifically, as shown in FIG. 5A, a part of the surface of the three-dimensional gather 26 is temporarily fixed to the surface of the top sheet by a plurality of temporary fixing portions 28, and the plurality of temporary fixing portions 28 are , toward the longitudinal direction of the standing gathers 26 (longitudinal direction), those which are intermittently arranged.

  Such a configuration has an advantage that the width of the pocket can be adjusted step by step by the number of peeling of the temporary fixing portions as compared with the case where the temporary fixing portions are formed on the entire surface. The example shown in FIG. 5A is an example in which the front end side and the rear end side of the three-dimensional gather 26 are temporarily fixed out of the surface of the three-dimensional gather 26 by the substantially rectangular temporary fixing portion 28. In this example, five temporary fixing portions 28 are formed on the front end side and the rear end side in the length direction of the three-dimensional gather 26, and pockets are formed on the front end side and the rear end side of the three-dimensional gather. The width can be adjusted to 5 levels.

  For the same reason, in the absorbent article of the present invention, as shown in FIGS. 5B and 5C, a part of the surface of the three-dimensional gather 26 is temporarily fixed to the top sheet surface by a plurality of temporary fixing portions 28. It is also preferable that the plurality of temporary fixing portions 28 are intermittently arranged in the height direction of the three-dimensional gather 26. Such a configuration has an advantage that the depth of the pocket can be adjusted stepwise by the number of peeling of the temporary fixing portions.

  The example shown in FIG. 5B is an example in which the front end side and the rear end side of the three-dimensional gather 26 are temporarily fixed out of the surface of the three-dimensional gather 26 by the circular temporary fixing portion 28. In this example, ten temporary fixing portions 28 are arranged in a matrix of 5 rows × 2 columns on the front end side and the rear end side, respectively. That is, a two-stage temporary fixing portion 28 is formed in the height direction of the three-dimensional gather 26 so that the pocket depth can be adjusted in two stages on each of the front end side and the rear end side of the three-dimensional gather. It is configured.

  In the example shown in FIG. 5C, the region between the two fixed portions 30 on the front end side and the rear end side of the three-dimensional gather 26 is intermittently temporarily provided on the surface of the three-dimensional gather 26 by the substantially rectangular temporary fixing portions 28. It is an example that has been stopped. In this example, ten temporary fixing portions 28 are arranged in a matrix of 5 rows × 2 columns from the front end side to the rear end side. That is, a two-step temporary fixing portion 28 is formed in the height direction of the three-dimensional gather 26, and the depth of the pocket can be adjusted in two steps in the entire region from the front end side to the rear end side of the three-dimensional gather. It is configured as follows.

  In the absorbent article of the present invention, as shown in FIGS. 5B and 5C, a part of the surface of the three-dimensional gather 26 is temporarily fixed to the surface of the top sheet by a plurality of temporary fixing portions 28. It is also preferable that the plurality of temporary fixing portions 28 are intermittently arranged in both the length direction and the height direction of the three-dimensional gather 26. If it is such a structure, both the width | variety and depth of a pocket can be adjusted in steps with the number which peels a temporary fix | stop part.

  When a plurality of temporary fixing portions are intermittently formed, it is not necessary to make the peeling forces of all the temporary fixing portions equal, and different values may be used depending on the purpose. Among them, the absorbent article of the present invention has a peeling strength of the temporary fixing portion arranged on the center side in the longitudinal direction of the three-dimensional gathers, rather than a peeling strength of the temporary fixing portions arranged on the front end side and the rear end side of the three-dimensional gathers. It is preferable that it is low.

  The configuration as described above is effective when the temporary fixing portions 28 are formed on the front end side and the rear end side of the three-dimensional gather 26 as shown in FIGS. 5A and 5B. For example, when increasing the width of a pocket formed in the longitudinal center of the three-dimensional gather 26, the peel strength of the temporary fixing portion on the side close to the pocket is lowered to facilitate peeling, while the side far from the pocket (three-dimensional gather 26 It is possible to increase the peel strength of the temporary fixing portion 28 on the side close to the front end and the rear end and make it difficult to peel off. That is, it can be configured to be easy to peel off a portion that has a high possibility of peeling, and to make it difficult to peel off the other portions so as not to unintentionally peel off.

  For the same reason, the absorbent article of the present invention has a peel strength of the temporary fixing portion arranged on the free end side of the three-dimensional gathers rather than a peel strength of the temporary fix portion arranged on the fixed end side of the three-dimensional gather. It is preferable that it is low. For example, when increasing the depth of the pocket of the three-dimensional gather 26, the peeling strength of the temporary fixing portion 28 on the side close to the opening of the pocket (the free end E1 side of the three-dimensional gather 26) is lowered to facilitate the removal. The peeling strength of the temporary fixing part 28 on the side far from the part (the upright line L1 side of the three-dimensional gather 26) can be made high and difficult to peel off.

  As shown in FIGS. 5A and 5B, the absorbent article of the present invention is temporarily fixed at the front end side and the rear end side of the three-dimensional gather 26 among the surfaces of the three-dimensional gather 26 (temporary fixing portion 28). It is preferable that the longitudinal center part of the gathers 26 is in an unfixed state with respect to the surface of the top sheet. Such a form has an advantage that the range in which the function of the three-dimensional gather is exhibited can be adjusted as appropriate, which is preferable. For example, if the temporary fixings on the front end side and the rear end side are used without being peeled off, only the three-dimensional gather existing in the crotch portion stands up. On the other hand, if the front end side and the rear end side temporary fixings are long separated, the three-dimensional gather can be raised in a long range from the front body side to the back body side.

  Moreover, as for the absorbent article of this invention, as shown to FIG. 5C, it is also preferable that the part from the front end side of the solid gather 26 to the rear end side is temporarily fixed among the surfaces of the solid gather 26 ( Temporary fixing part 28). In such a configuration, since the three-dimensional gather is temporarily fixed over the entire length direction (front-rear direction), the wearer can select a desired position of the temporary fixing portion according to the width of the urine removing pad and the position of the ear. Can be peeled off.

In the example shown in FIG. 5D, the front end side and the rear end side of the three-dimensional gather 26 are temporarily fixed out of the surface of the three-dimensional gather 26 (temporary fixing portion 28), and the central portion in the longitudinal direction of the three-dimensional gather 26 is the top sheet. It is fixed to the surface (fixed part 34). When using a large urine absorbing pad, such a configuration can be used to fix the urine absorbing pad by peeling off the temporary fixing of the front end and rear end according to the ear of the pad. By making the three-dimensional gather at the crotch part lower than the three-dimensional gather of the pad, it is possible to prevent contamination of the disposable diaper used in combination with the urine collecting pad and to reduce the replacement frequency of the diaper itself.

  1A to 1F and FIGS. 5A to 5D all show an example in which the present invention is applied to an upside down type three-dimensional gather (inside-down gather), but the configuration of the absorbent article of the present invention is other The present invention can also be applied to three-dimensional gathers of the form.

  6A to 6C are schematic cross-sectional views showing a cross section of the diaper cut in the width direction (left-right direction) at the central portion in the longitudinal direction. The absorbent article 1B shown in FIGS. 6A to 6C applies the present invention to an absorbent article provided with an externally-applied three-dimensional gather 26B (an overturned gather) that stands up so as to incline toward the outer side in the width direction of the diaper. This is an example. In this example, as shown in FIG. 6A, the surface S2 is temporarily fixed to the surface of the top sheet 18 (side sheet 18b) to form a temporary fixing portion 28. FIG. 6B shows a state in which the temporary fixing portion 28 has been partially peeled off, and FIG. 6C shows a state in which all of the temporary fixing portions 28 have been released.

  6A to 6C, when the three-dimensional gather 26B and the side sheet 18b are formed of a single water-repellent sheet, the water-repellent sheet is centered by the fixing portion 32. A portion fixed to 18a is a side sheet 18b, and a portion beyond the standing line L2 that is not fixed by the fixing portion 32 is a three-dimensional gather 26B.

  7A to 7D are also schematic cross-sectional views showing the same cross section as FIGS. 6A to 6C. The absorbent article 1C shown in FIG. 7A to FIG. 7C is an outside-inside-down type three-dimensional gather 26C (outside that inclines toward the inner side in the width direction of the diaper after being once inclined from the fixed end side toward the outer side in the width direction of the diaper. This is an example in which the present invention is applied to an absorbent article provided with an inside-down gather). In this example, as shown in FIG. 7A, the front surface S2 is temporarily fixed to the surface of the top sheet 18 (side sheet 18b) to form a temporary fixing portion 28. FIG. 7B shows a state in which the temporary fixing portion 28 has been partially peeled off, and FIG. 7C shows a state in which all of the temporary fixing portions 28 have been peeled off.

  Note that the absorbent article 1C 'illustrated in FIG. 7D is a modification of the absorbent article 1C illustrated in FIGS. 7A to 7C. In the absorbent article 1C ', similarly to the absorbent article 1C, the surface S2 of the three-dimensional gather 26C is temporarily fixed to the surface of the top sheet 18 (side sheet 18b) to form a first temporary fixing portion 28a. In addition to the first temporary fixing portion 28a, the surfaces S1 of the three-dimensional gather 26C are temporarily fixed to form a second temporary fixing portion 28b.

  8A to 8D are also schematic cross-sectional views showing the same cross section as FIGS. 6A to 6C. The absorbent article 1D shown in FIG. 8A to FIG. 8C is an inward / outside-down type three-dimensional gather 26D (inside / outside down) that inclines toward the inner side in the width direction of the diaper after being inclined once from the fixed end side. This is an example in which the present invention is applied to an absorbent article having a gather. In this example, as shown in FIG. 8A, the front surface S1 is temporarily fixed to the surface of the top sheet 18 (center sheet 18a) to form a temporary fixing portion 28. FIG. 8B shows a state in which the temporary fixing portion 28 has been partially peeled off, and FIG. 8C shows a state in which all of the temporary fixing portions 28 have been peeled off.

  Note that the absorbent article 1D 'shown in FIG. 8D is a modification of the absorbent article 1D shown in FIGS. 8A to 8C. In the absorbent article 1D ', as in the absorbent article 1D, the surface S1 of the three-dimensional gather 26D is temporarily fixed to the surface of the top sheet 18 (center sheet 18a) to form a first temporary fixing portion 28c. In addition to the first temporary fixing portion 28c, the surfaces S2 of the three-dimensional gather 26D are temporarily fixed to form a second temporary fixing portion 28d.

[1-2] Absorber:
The absorber is a member for absorbing and holding the wearer's urine. The absorber is made of an absorbent material because it needs to absorb and retain the wearer's urine and body fluid.

  Examples of the absorbent material constituting the absorber include conventionally known absorbent materials usually used for disposable diapers and other absorbent articles, such as fluff pulp, super absorbent polymer (Super Absorbent Polymer; hereinafter referred to as “SAP”). And a hydrophilic sheet. It is possible to use wood pulp or non-wood pulp defibrated as fluff pulp, sodium polyacrylate as SAP, tissue, absorbent paper, hydrophilized nonwoven fabric as hydrophilic sheet preferable.

  These absorbent materials are usually used as a single-layer or multi-layer mat. Under the present circumstances, 1 type may be used independently among the said absorptive materials, and 2 or more types may be used together. Especially, what used together about 10-500 mass parts SAP with respect to 100 mass parts of fluff pulp is preferable. At this time, the SAP may be uniformly mixed in each mat of fluff pulp, or may be arranged in layers between the layers of the multilayer fluff pulp.

  Usually, the absorber is interposed between the top sheet and the back sheet by being sandwiched between the top sheet and the back sheet and sealing the peripheral edge thereof. Therefore, the flap part in which the absorber is not interposed is formed between the top sheet and the back sheet at the peripheral part of the absorber. The absorbent body may be interposed at least in the crotch region, and the absorbent body may extend to the front body and the back body.

  It is preferable that the absorber is entirely wrapped with a hydrophilic sheet. Such a configuration has an advantage that SAP can be prevented from leaking from the absorber and shape stability can be imparted to the absorber.

  Although there is no restriction | limiting in particular about the shape of an absorber, The shape used in the conventional disposable diaper and other absorbent articles, for example, a rectangular shape, an hourglass type, a gourd type, a T shape etc. can be mentioned.

  An absorbent article 1A shown in FIG. 1F is an example in which an hourglass-type absorber having a wide portion corresponding to the front body 2 and the back body 6 of the diaper is used as the absorber 22.

  In addition, a sheet (second sheet) for diffusing liquid such as urine and body fluid may be incidentally disposed on the surface side of the absorber (for example, between the absorber and the top sheet). . When this second sheet is attached, due to the wearer's posture, etc., even when the space on the back side of the top sheet is not sufficiently formed, the absorption rate of urine, body fluid, etc. is difficult to decrease, and the absorption rate decreases. It is possible to prevent leakage of urine and body fluids.

  Examples of the material constituting the second sheet include hydrophilic and liquid-permeable materials such as woven fabric, non-woven fabric, porous plastic, and fluff pulp. Examples of these constituent materials include polypropylene, polyethylene, polyester, rayon, pulp, and composite fibers thereof. As the pulp, crimped fibers such as curly cellulose fibers can be suitably used.

[1-3] Top sheet:
A top sheet is a sheet | seat arrange | positioned so that the surface (surface located in a wearer's skin side at the time of installation of an absorbent article) of an absorber may be coat | covered. At least a part (all or a part) of the top sheet is made of a liquid-permeable material because the absorber disposed on the back surface side needs to absorb the wearer's urine. Usually, at least near the surface of the absorber, it is made of a liquid-permeable material that can permeate the wearer's urine and body fluid. As long as at least a part is made of the liquid permeable material, the entire top sheet is not necessarily made of the liquid permeable material.

  Examples of the liquid permeable material constituting the top sheet include a woven fabric, a nonwoven fabric, and a porous film. Among these, it is preferable to use a nonwoven fabric made of a thermoplastic resin such as polypropylene, polyethylene, polyester, aliphatic polyamide (trade name: nylon), etc., which has been subjected to a hydrophilic treatment. There is no restriction | limiting in particular also about the kind of nonwoven fabric, The conventionally well-known nonwoven fabric manufactured by various manufacturing methods, such as air through (card hot air), card | curd embossing, and a spun bond, can be used suitably.

  The top sheet may be composed of a single sheet material, but may be composed of a plurality of sheet materials. For example, the form which comprises the top sheet arrange | positioned at the surface part of an absorber and the top sheet arrange | positioned in the part of a side flap by a different sheet | seat is also utilized frequently.

  For example, the absorbent article 1A shown in FIG. 1A is a tape-type disposable diaper, and a top sheet 18 (center sheet 18a) made of a liquid-permeable material is disposed at the center in the width direction of the diaper, and the side flap 8 of the diaper. This is an example in which a top sheet 18 (side sheet 18b) made of a breathable water-repellent material exhibiting resistance to liquid permeation is disposed in the portion. The ventilated water-repellent sheet may be a non-woven fabric produced by a method such as card embossing or spunbond, but a non-woven fabric sheet such as SMS or SMMS having a high waterproof property is more preferable.

[1-4] Backsheet:
The back sheet is a sheet that is arranged so as to cover the back surface of the absorbent body (the surface that is positioned on the wearer's clothing side when the absorbent article is mounted). The back sheet is made of a liquid-impermeable material because it is necessary to prevent the wearer's urine from leaking outside the diaper. Although there is no restriction | limiting in particular about the arrangement | positioning method, For example, the structure which arrange | positions the back seat | sheet 20 so that it may correspond with the external shape of an absorbent article like the absorbent article 1A shown to FIG. 1F is employable. However, it is not always necessary to adopt such a configuration. From the viewpoint of preventing leakage of urine absorbed by the absorber, a back sheet made of a liquid-impermeable material is disposed at least in a portion where the absorber is present. May be.

  Examples of the liquid-impermeable material constituting the backsheet include a liquid-impermeable film made of a resin such as polyethylene. Among these, a microporous polyethylene film is preferably used. This microporous polyethylene film has a large number of fine pores of 0.1 to several μm, and is liquid impervious but has moisture permeability, so that the inside of the diaper can be prevented from being steamed There is.

  Note that a sheet material (cover sheet) may be bonded to the outer surface of the back sheet. This cover sheet is used to reinforce the back sheet and improve the feel (tactile feeling) of the back sheet.

  Examples of the material constituting the cover sheet include woven fabric and non-woven fabric. Especially, it is preferable to use the dry nonwoven fabric and wet nonwoven fabric which consist of thermoplastic resins, such as polyethylene, a polypropylene, and polyester.

[1-5] Fastening tape:
The absorbent article of the present invention may be a tape-type disposable diaper. The “tape-type disposable diaper” is composed of the front body 2, the crotch 4, and the back body 6 as in the absorbent article 1 </ b> A shown in FIG. 1F. A top sheet 18 made of a permeable material and arranged to cover the surface of the absorber 22, and a back sheet 20 made of a liquid-impermeable material and arranged to cover the back surface of the absorber 22. It is a disposable diaper provided with a fastening tape 10 for fixing the front body 2 and the back body 6 arranged so as to extend from the left and right side edges 6a, 6b of the back body 6.

  The tape-type disposable diaper such as the absorbent article 1A has an advantage that the wearer can easily attach the front body 2 and the back body 6 of the diaper to each other with the fastening tape 10. is doing. And a wearer's excrement permeate | transmits the liquid-permeable part of the top sheet 18, is absorbed by the absorber 22, and the leak to the outside is prevented by the back sheet 20 comprised with a liquid-impermeable material. The excrement can be held inside the diaper.

  The fastening member of the fastening tape may be an adhesive fastener that is fixed by an adhesive, but it is preferable to use a canal fastener (planar fastener) that is fixed by mechanical coupling. In addition to high fastening force, the mechanical fastener has an advantage that the fastening force does not decrease even when the detachment is performed a plurality of times.

  For example, the absorbent article 1A illustrated in FIG. 1F is an example in which a mechanical fastener 44 is used as a fastening member. A hook material 44 a is attached near the front end of the fastening tape 10, while a front patch 12 made of a loop material 44 b is attached to the front body 2, and the fastening tape 10 is attached to the front patch 12. It is comprised so that it can stop.

  Although the number of fastening tapes is not particularly limited, it is preferable that two fastening tapes are arranged on each of the left and right side edges of the back body. For example, the absorbent article 1A shown in FIG. 1F has two fastening tapes 10 disposed on the left and right side edges 6a and 6b of the back body 6. In this way, the tape-type disposable diaper in which two fastening tapes are arranged in comparison with the one in which the tape is disposed one by one, the wearer's body shape, specifically, the size around the waist and around the legs. It is excellent in that the tape position and tightening can be adjusted.

[1-6] Various elastic materials:
Moreover, when the absorbent article of this invention is a disposable diaper, it is preferable to arrange | position an elastic material around a leg and arrange an elastic material around a waist.

  The leg circumference elastic material is an elastic material arranged along the leg circumference opening. By arranging the leg-stretchable material, a gather (leg gather) rich in stretchability can be formed in the leg-surrounding opening. Therefore, it is difficult to form a gap around the leg, and urine leakage from the opening around the leg can be effectively prevented. Further, when the leg stretchable material is disposed, the leg stretchable material contracts on both sides of the absorbent body when changing the diaper, so that the vicinity of the crotch portion is deformed into a bowl shape and a recess is formed. For this reason, urine and body fluid accumulate in the concave portion, and the diaper can be easily replaced without spilling urine and body fluid.

  For example, an absorbent article 1A shown in FIG. 1A is an example in which leg gathers are formed by arranging two leg-stretchable elastic members 40 linearly along the longitudinal direction of the diaper. The leg-around elastic member 40 is made of rubber thread. However, the leg-surrounding elastic members are not necessarily arranged linearly, and may be arranged in a curved line along the curve of the leg-periphery opening, for example.

  The leg stretchable material is preferably formed with a leg stretchable material 40 at a portion outside the upright line L1 of the three-dimensional gather 26 as in the absorbent article 1A shown in FIG. 1A, for example. With such a configuration, it is possible to improve the wearing feeling and wearing feeling of the crotch part while ensuring a sufficient leakage preventing effect of the three-dimensional gather.

  The waist elastic material is an elastic material arranged along the waist opening. By arranging the elastic material around the waist, a gather (waist gather) rich in elasticity can be formed in the waist opening. This waist gather makes it difficult for gaps to be formed around the waist, preventing urine leakage from around the waist, and improving the fit of the diaper to the wearer, thereby preventing the diaper from falling down.

  In addition, 1 A of absorbent articles shown to FIG. 1F are the examples which have arrange | positioned the strip | belt-shaped waist circumference elastic material 42 along the edge of the back body 6 of a diaper. The belt-like waist elastic member 42 is made of an elastic foam such as urethane foam. In the illustrated example, the waist elastic member 42 is disposed only on the back body (back side), but the waist elastic material may be disposed on the front body (abdominal side).

  When the absorbent article of the present invention is a pants-type disposable diaper, it is preferable to arrange an elastic material around the abdomen. An abdominal circumference elastic material is an elastic material arrange | positioned in the part (namely, part equivalent to a wearer's abdominal circumference) between a waist circumference opening part and a leg circumference opening part. By arranging the elastic material around the abdomen, it is possible to form a highly elastic tammy gather around the abdomen of the wearer. This Tammy Gather, together with West Gather, can make the diaper fit and anti-slip effect even better.

  For these stretchable materials, after considering the degree of shrinkage of gathers, etc., the constituent material, the elongation rate of the material, the stretched state at the time of fixing, etc. may be determined.

  As an elastic material, the elastic material which has been used with the conventional disposable diaper can be used conveniently. Specific examples include elastic rubber, elastic film, elastic foam (urethane foam, etc.), etc., as well as thread rubber and flat rubber made of elastic materials such as natural rubber and synthetic rubber (urethane rubber, etc.). .

  The stretchable material is preferably fixed in the stretched state in order to exert a sufficient stretch force. For example, when the elastic material is natural rubber or synthetic rubber, it is preferably fixed in a stretched state of 120 to 400%, and more preferably fixed in a stretched state of 200 to 300%. By fixing in the extended state in such a range, it is possible to apply a sufficient expansion / contraction force without applying an excessive tightening force to the wearer.

  The stretchable material as described above is fixed to other constituent members of the diaper by an adhesive or other means. The fixing method may be, for example, adhesion using a hot melt adhesive or other highly fluid adhesive, or may be welding by heat such as heat sealing or ultrasonic waves.

[2] Manufacturing method:
The absorbent article which has a temporary fix | stop part can be manufactured by the following methods, for example. In the following description, an example in the case of manufacturing the absorbent article 1A shown in FIGS. 1A to 1C and 1F will be described.

  First, the absorbent body 22 and the leg elastic member 40 wrapped in a hydrophilic sheet are placed on the surface of a long sheet material (back sheet material) which is a material of the back sheet 20, and the center sheet is further placed on the surface. By placing a long sheet material (center sheet material) that becomes the material of 18a and a long sheet material (side sheet material) that becomes the material of the side sheet 18b, a laminated body (diaper that becomes an intermediate body of the diaper) To obtain a continuum). A three-dimensional gather 26A is formed by folding a part of the side sheet material.

  The side sheet material fixes a portion corresponding to the front and rear ends of the three-dimensional gather 26A and a portion outside the upright line L1 so as not to be easily peeled off by a hot melt adhesive or the like (fixing portion 30). Further, of the surface of the three-dimensional gather 26A, the front end side and the rear end side of the three-dimensional gather 26A are temporarily fixed to form a temporary fixing portion 28. The temporary fixing portion 28 can be formed by a method such as heat sealing.

  In the diaper continuous body obtained as described above, a portion corresponding to the opening around the leg of the diaper is cut out in an arc shape and cut (R cut) to form an opening around the leg. Finally, the fastening tape 10 is attached to the side edges 6a and 6b of the back body 6 of the diaper, and the continuous diaper is cut into individual diapers, whereby the absorbent article 1A (that is, a tape-type disposable diaper) is obtained. To manufacture.

  In addition to the method described above, a fastening tape is previously attached to the top sheet material, and on the surface of the back sheet material, the absorbent body wrapped in a hydrophilic sheet and the elastic material around the legs are placed, Furthermore, you may obtain a diaper continuous body by mounting the top sheet material to which the elastic fastening tape was attached to the surface.

  The series of steps as described above can be continuously performed by mechanical means. For example, by adopting a method / apparatus such as continuously feeding a long sheet material from a roller, continuous production of a tape-type disposable diaper becomes possible, which contributes to an improvement in productivity.

  The absorbent article of the present invention is an absorbent article for infants such as a urine-absorbing pad, a tape-type disposable diaper, a pants-type disposable diaper, or an adult such as an elderly person or a disabled person who needs care, particularly a urine-absorbing article. It can be suitably used as a tape-type disposable diaper for adults who often use a pad together.

It is a schematic plan view which shows one embodiment of an absorbent article , and is a figure which shows the state which expand | deployed the absorbent article and was seen from the top sheet side. It is a schematic sectional drawing which shows one Embodiment of an absorbent article, and shows the XX 'cross section of the absorbent article shown to FIG. 1A. It is a schematic sectional drawing which shows one Embodiment of an absorbent article, and shows the YY 'cross section of the absorbent article shown to FIG. 1A. It is a schematic sectional drawing which shows the use condition of an absorbent article, and shows the YY 'cross section of the state which peeled partially the temporary fix | stop part of the absorbent article shown to FIG. 1A. It is a schematic sectional drawing which shows the use condition of an absorbent article, and shows the YY 'cross section of the state which peeled completely the temporary fix | stop part of the absorbent article shown to FIG. 1A. It is a partially cutaway schematic plan view showing an embodiment of an absorbent article, and is a view showing a state in which the absorbent article shown in FIG. 1A is developed and partly cut away. It is a schematic plan view which shows one Embodiment of the conventional absorbent article, and is a figure which shows the state which expand | deployed the absorbent article and was seen from the top sheet side. It is a schematic plan view which shows another embodiment of the conventional absorbent article, and is a figure which shows the state which expand | deployed the absorbent article and was seen from the top sheet side. It is a schematic plan view which shows another embodiment of the conventional absorbent article, and is a figure which shows the state which expand | deployed the absorbent article and was seen from the top sheet side. It is a partially expanded plan view of the absorbent article of the present invention, and shows one embodiment of a temporary fixing part formed in a three-dimensional gather. It is a partially expanded plan view of the absorbent article of the present invention, and shows another embodiment of a temporary fixing part formed in a three-dimensional gather. It is a partially expanded plan view of the absorbent article of the present invention, and shows still another embodiment of a temporary fixing portion formed in a three-dimensional gather. It is a partially expanded plan view of an absorbent article , and shows still another embodiment of a temporary fixing part formed in a three-dimensional gather. It is a schematic sectional drawing which shows another embodiment of the absorbent article of this invention, and is a figure which shows the cross section which cut | disconnected the absorbent article toward the width direction (left-right direction) in the longitudinal direction center part. It is a schematic sectional drawing which shows another embodiment of the absorbent article of this invention, and is a figure which shows the state which peeled partially the temporary fix | stop part of the absorbent article shown to FIG. 6A. It is a schematic sectional drawing which shows another embodiment of the absorbent article of this invention, and is a figure which shows the state which peeled all the temporary fix | stop parts of the absorbent article shown to FIG. 6A. It is a schematic sectional drawing which shows another embodiment of the absorbent article of this invention, and is a figure which shows the cross section which cut | disconnected the absorbent article toward the width direction (left-right direction) in the longitudinal direction center part. It is a schematic sectional drawing which shows another embodiment of the absorbent article of this invention, and is a figure which shows the state which peeled partially the temporary fix | stop part of the absorbent article shown to FIG. 7A. It is a schematic sectional drawing which shows another embodiment of the absorbent article of this invention, and is a figure which shows the state which peeled all the temporary fix | stop parts of the absorbent article shown to FIG. 7A. It is a schematic sectional drawing which shows another embodiment of the absorbent article of this invention, and is a figure which shows the modification which further formed the temporary fix | stop part in the absorbent article shown to FIG. 7A. It is a schematic sectional drawing which shows another embodiment of the absorbent article of this invention, and is a figure which shows the cross section which cut | disconnected the absorbent article toward the width direction (left-right direction) in the longitudinal direction center part. It is a schematic sectional drawing which shows another embodiment of the absorbent article of this invention, and is a figure which shows the state which peeled partially the temporary fix | stop part of the absorbent article shown to FIG. 8A. It is a schematic sectional drawing which shows another embodiment of the absorbent article of this invention, and is a figure which shows the state which peeled all the temporary fix | stop parts of the absorbent article shown to FIG. 8A. It is a schematic sectional drawing which shows another embodiment of the absorbent article of this invention, and is a figure which shows the modification which further formed the temporary fix | stop part in the absorbent article shown to FIG. 8A.

Explanation of symbols

1A, 1B, 1C, 1C ′, 1D, 1D ′, 100A, 100B, 100C: absorbent article, 2: front body, 4: crotch, 6: back body, 6a, 6b: side edge, 8: side flap 10: Fastening tape, 12: Front patch, 18: Top sheet, 18a: Center sheet, 18b: Side sheet, 20: Back sheet, 22: Absorber, 26, 26A, 26B, 26C, 26D: Solid gather, 28: Temporary fixing part, 28a, 28c: First temporary fixing part, 28b, 28d: Second temporary fixing part, 30, 32, 34: Adhering part, 36: Three-dimensional gather elastic material, 40: Leg elastic material, 42 : Elastic material around waist, 44: Mechanical fastener, 44a: Hook material, 44b: Loop material, 50: Gather sheet, 52: Trajectory, 54: Pocket, 58: Urine collecting pad, 60: Large size Head, 70: fixing portion, 72: pocket 74: small pad, E1: free ends, L1, L2: upright lines, S1, S2: surface.

Claims (6)

An absorber, at least partly made of a liquid-permeable material, a top sheet arranged to cover the surface of the absorber, and a liquid-impermeable material so as to cover the back surface of the absorber A back sheet disposed, and a water repellent sheet, and a pair of three-dimensional gathers disposed on both sides of the absorber,
Part of the surface of the three-dimensional gather is at least one of the surface of the top sheet and the surface of the three-dimensional gather itself by a plurality of temporary fixing portions formed by hot embossing or ultrasonic welding . Temporarily fixed to be peelable ,
The plurality of temporary fixing portions are intermittently arranged in the length direction of the three-dimensional gather,
An absorbent article in which the width of a pocket formed between the three-dimensional gather and the top sheet can be adjusted stepwise by the number of peeling of the temporary fixing portions . The plurality of temporary fixing portions have a peeling strength of the temporary fixing portions arranged on the center side in the longitudinal direction of the three-dimensional gathers rather than a peeling strength of the temporary fixing portions arranged on the front end side and the rear end side of the three-dimensional gathers. the absorbent article of claim 1 which is low. A part of the surface of the three-dimensional gather is temporarily fixed to a surface of at least one of the surface of the top sheet and the surface of the three-dimensional gather itself by a plurality of temporary fixing portions,
The absorbent article according to claim 1 or 2 , wherein the plurality of temporary fixing portions are intermittently arranged in a height direction of the three-dimensional gather. In the plurality of temporary fixing portions, the peeling strength of the temporary fixing portions arranged on the free end side of the three-dimensional gather is lower than the peeling strength of the temporary fixing portions arranged on the fixed end side of the three-dimensional gather. The absorbent article according to claim 3 . Of the surface of the three-dimensional gather, the front end side and the rear end side of the three-dimensional gather are temporarily fixed, and the longitudinal central portion of the three-dimensional gather is in an unfixed state with respect to the surface of the top sheet. The absorbent article as described in any one of Claims 1-4 . The front end side and the rear end side of the three-dimensional gather among the surfaces of the three-dimensional gather are temporarily fixed, and the longitudinal direction center part of the three-dimensional gather is fixed to the surface of the top sheet. The absorbent article as described in any one of 4 .

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