JP2013215388A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent article improved in durability, and allowing improvement of a fitting property or a wear feeling while securing absorption performance even when used for a long period in a day.SOLUTION: An absorbent article includes a compression part 80 where a front face sheet and an absorber are compressed in the thickness direction. The compression part includes: a pair of first longitudinal compression parts 81 disposed on both the outsides of a central area CA in the width direction; and a pair of second longitudinal compression parts 82 deposed on both the outsides of the first longitudinal compression parts in the width direction. In the second longitudinal compression part, a plurality of second curve parts 86 each having a convex shape toward the outside in the width direction are formed continuously in the longitudinal direction. An end part in the longitudinal direction of the second curve part 86 is formed on a center line passing the center in the longitudinal direction of the central area and running along the width direction. The end part in the longitudinal direction of each second curve part is disposed on the inside in the width direction of an outer end part in the width direction of the second curve part.

Description

  The present invention relates to an absorbent article such as a sanitary napkin.

  In Patent Document 1 and Patent Document 2, a physiological article as an absorbent article having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body disposed between the top sheet and the back sheet. A napkin for use is described. In the absorbent article of Patent Document 1, a channel in which a top sheet and an absorbent body are compressed in the thickness direction is formed. The channel is formed in an annular shape so as to surround an excretion opening contact area that contacts the excretion opening of the wearer.

  Further, the absorbent article of Patent Document 2 describes a sanitary napkin having a flexible shaft in which a top sheet and an absorbent body are compressed in the thickness direction. The flexible shaft is formed in an arc shape projecting inward in the width direction on both outer sides in the width direction of the excretory opening contact region.

  The excretory opening contact region of the absorber is positioned so as to be sandwiched between the legs of the wearer while being placed on the wearer's crotch while being worn by the wearer. The absorbent body is sandwiched between the legs of the wearer and a force is applied from the outer side in the width direction toward the inner side in the width direction, whereby the annular channel or the flexible shaft is deformed inward.

Japanese Patent Laying-Open No. 2008-541943 (FIG. 1 etc.) JP-A-10-99372 (FIG. 1 etc.)

However, the above absorbent article has the following problems.
For example, the excretory opening contact area described in Patent Document 1 is surrounded by an elliptical annular channel, and the entire excretion opening contact area is compressed inward by the channel, whereby the excretion opening contact area The width may be shortened.

  Further, in the absorbent article described in Patent Document 2, the arc shape of the pair of flexible shafts is one place, and the distance between the pair of flexible shafts is the shortest in the central portion in the longitudinal direction of the excretory opening contact region. ing. Therefore, stress concentrates on the center in the longitudinal direction of the excretory opening contact area, and the width of the center in the longitudinal direction of the excretion opening contact area tends to be short. Thus, when the width | variety of an excretion opening | mouth contact area | region becomes short locally, an absorber cannot be arrange | positioned facing an excretion opening | mouth, and there exists a possibility that the leakage of a bodily fluid may generate | occur | produce. Moreover, if the mounting position of the absorbent article is shifted in the longitudinal direction, the portion where the distance between the pair of flexible shafts is shortened is not arranged corresponding to the excretory opening contact region, and the fit may not be improved.

  In recent years, absorbent articles have become popular in developing and emerging countries. As a result of investigating the use modes in developing countries and the like by the present applicant, it has been found that there are wearers who feel resistance to carrying absorbent articles in countries that have just started to spread. Moreover, even if the wearer has no resistance to carrying the absorbent article, the absorbent article cannot be properly replaced because the environment for exchanging the absorbent article is not in place or there is no place to throw it away. It was found that there was a wearer. Such a wearer has a longer wearing time during the day than a wearer who carries an absorbent article and replaces it appropriately.

  If the wearing time during the day becomes long, the number of times that the body is pinched by the legs during walking increases, and the absorbent body is repeatedly compressed inward in the width direction. When the absorbent article is repeatedly compressed inward in the width direction, the width of the absorbent body is further shortened, and the absorbent body may not be disposed at a position facing the excretion opening, or the absorbent body may be cured. Thus, if the absorbent body is not disposed facing the excretion opening, there is a possibility that body fluid leaks. Moreover, when the excretion opening | mouth contact | abutting area | region of an absorber hardens | cures, there exists a possibility that a feeling of mounting may deteriorate or a fitting property may fall.

  Therefore, the present invention has been made in view of the above-described problems, and improves the durability of the absorbent article, and even when used for a long time during the day, the absorption performance is secured while being fit. It aims at providing the absorbent article which can improve a property and a feeling of wearing.

  In order to solve the above-described problems, an absorbent article according to the present invention includes a liquid-permeable top sheet (top sheet 10), a liquid-impermeable back sheet (back sheet 20), and the top sheet and the back sheet. An absorbent article (absorbent article) in which a compressed portion is formed by compressing the topsheet and the absorbent body in the thickness direction of the absorbent article. 1) Comprising: The said compression part is the width direction both outer sides of the said absorbent article rather than the center area | region (central area | region CA) containing the center of the excretion opening | mouth contact | abutting area | region arrange | positioned facing a wearer's excretion opening | mouth. And a pair of first longitudinal pressing parts (first longitudinal pressing part 81) extending in the longitudinal direction of the absorbent article, and arranged on both outer sides in the width direction than the first longitudinal pressing part, and A pair of second longitudinal pressing parts (second longitudinal direction) extending in the longitudinal direction Squeezed portion 82), and a plurality of curved portions (second curved portion 86) having a convex shape toward the outer side in the width direction are continuously provided in the second longitudinal compressed portion in the longitudinal direction. In addition, an end portion in the longitudinal direction of the curved portion (longitudinal end portion 86L of the second curved portion 86) passes through the longitudinal center of the central region and is on a center line (center line CACL) along the width direction. It is provided that the end in the longitudinal direction of each curved portion is arranged on the inner side in the width direction than the outer end in the width direction of each curved portion.

  According to the absorbent article according to the present disclosure, the durability of the absorbent article is improved, and even when used for a long time during the day, the absorption performance is ensured and the fit and the feeling of wearing are improved. Provide an absorbent article that can

It is the top view seen from the skin contact surface side of the absorptive article concerning a 1st embodiment. It is a schematic cross section of the AA cross section shown in FIG. It is the top view which expanded the pressing part of the absorbent article shown in FIG. It is a figure which shows typically the deformation | transformation aspect of the absorbent article shown in FIG.

  With reference to drawings, the absorbent article 1 which concerns on embodiment is demonstrated. FIG. 1 is a plan view of the absorbent article, and FIG. 2 is a cross-sectional view taken along line AA shown in FIG. The absorbent article 1 according to the present embodiment is, for example, a sanitary napkin.

  The absorbent article according to the embodiment is a daytime sanitary napkin. Therefore, in the absorbent article according to the present embodiment, the lengths of the front area FA located on the front side of the wearer in the longitudinal direction and the rear area BA located on the rear side of the wearer are substantially the same.

  In addition, the area | region between a pair of wing parts mentioned later is center area | region CA containing the excretion opening | mouth contact | abutting area | region where a wearer's excretion opening contacts. A front side of the central area CA is a front side area FA, and a rear side of the central area CA is a rear side area BA.

  In the present embodiment, a daytime sanitary napkin is described as an example, but the absorbent article according to the present invention can also be applied to a night sanitary napkin. The night sanitary napkin is configured such that the rear area BA located on the rear side of the wearer is longer than the front area FA located on the front side of the wearer in the longitudinal direction.

  The absorbent article 1 includes a top sheet 10 that comes into contact with the wearer's skin, a liquid-impermeable back sheet 20 that does not transmit liquid, and an absorber 30. The absorber 30 is disposed between the top sheet 10 and the back sheet 20. Therefore, the absorber 30 is shown with a broken line in FIG.1 and FIG.2. The absorbent body 30 is disposed at the central portion in the longitudinal direction L and the width direction W of the absorbent article 1.

  The absorbent article 1 includes wing portions 43 and 44 provided outside the absorbent body 30 in the width direction W orthogonal to the longitudinal direction L in the plan view shown in FIG. Furthermore, the absorbent article 1 includes side sheets 41 and 42 provided outside the absorber 30 in the width direction W.

  The top sheet 10 is a liquid-permeable sheet that transmits liquid such as body fluid. The top sheet 10 covers at least the surface of the absorber 30. The top sheet 10 is not particularly limited as long as it is a sheet-like material having a structure that allows liquid to permeate, such as a nonwoven fabric, a woven fabric, a perforated plastic sheet, and a mesh sheet. Either natural fibers or chemical fibers can be used as the woven or non-woven material.

  Examples of natural fibers include cellulose such as pulverized pulp and cotton. Examples of the chemical fiber include regenerated cellulose such as rayon and fibril rayon, semi-synthetic cellulose such as acetate and triacetate, thermoplastic hydrophobic chemical fiber, and thermoplastic hydrophobic chemical fiber subjected to hydrophilic treatment.

  Examples of the thermoplastic hydrophobic chemical fibers include single fibers such as polyethylene (PE), polypropylene (PP), and polyethylene terephthalate (PET), fibers obtained by graft polymerization of PE and PP, and composite fibers such as a core-sheath structure. As mentioned.

  In particular, for non-woven fabrics, web forming may be performed by any of dry methods (card method, spun bond method melt blown method, air laid method, etc.), wet methods, or a combination of a plurality of them. Examples of bonding methods include thermal bonding, needle punching, chemical bonding, and the like, but are not particularly limited to these methods. Moreover, you may use the spunlace formed in the sheet form by the hydroentanglement method.

  As the perforated plastic sheet, a perforated sheet of a thermoplastic resin such as PE, PP, and PET, a porous foam material, or the like can be used. Moreover, about these, it is also preferable to make it cloudy by mixing the filler which consists of a titanium oxide, a calcium carbonate, etc. in the range of 0.5 to 10% as needed. Moreover, you may use the perforated film which opened the film which consists of the said thermoplastic resin by perforation, heat embossing, or machining. The perforated film may be used as a composite sheet with a nonwoven fabric.

The back sheet 20 has substantially the same length as that of the top sheet 10. As the back sheet 20, a polyethylene sheet, a laminated nonwoven fabric mainly composed of polypropylene, a breathable resin film, a spunbond, a sheet obtained by bonding a breathable resin film to a nonwoven fabric such as spunlace, or the like can be used. The back sheet 20 is preferably made of a material having flexibility that does not cause a sense of incongruity when worn. For example, a film obtained from a basis weight of 15 to 30 g / m ² mainly composed of a low density polyethylene (LDPE) resin. Can be used. The back sheet 20 is desirably liquid-impervious and moisture-permeable, and can be constituted by a microporous sheet obtained by stretching a melt-kneaded inorganic filler such as polyethylene or polypropylene. .

  The absorber 30 includes hydrophilic fibers and pulp. The absorber 30 is formed of a material that can absorb body fluid such as menstrual blood. Examples include pulverized pulp, cellulose such as cotton, regenerated cellulose such as rayon and fibril rayon, semi-synthetic cellulose such as acetate and triacetate, particulate polymer, fibrous polymer, thermoplastic hydrophobic chemical fiber, or hydrophilic treatment. The thermoplastic hydrophobic chemical fibers, air bonded pulp treated with chemical bonds, etc. can be used alone or in combination.

The method for forming these materials into the absorbent body is not particularly limited, but for example, a sheet formed by an airlaid method, a meltblown method, a spunlace method, a papermaking method or the like is used. Moreover, a cellulose foam, a synthetic resin continuous foam, etc. can also be used as an absorber. Furthermore, it is also possible to use what was formed into an absorber after pulverizing the foam or the sheeted material. Among these, pulp is mixed in the range of 80 to 100%, particulate polymer is mixed in the range of 20 to 0%, coated with tissue, and then sheeted by embossing to have a basis weight of 100 to 2000 g / m ² , 1 to 50 mm The absorber which has the bulk of this is mentioned. Embossing is for preventing the shape of the absorber from being lost, and the embossed area ratio is in the range of 10 to 100%, preferably in the range of 30 to 80%.

The absorbent body 30 may be formed by laminating hydrophilic fibers or powder by the airlaid method, an airlaid sheet obtained by forming hydrophilic fibers or powder into a sheet shape by the airlaid method, or a tissue (for example, It may be formed by placing pulverized pulp mixed with a superabsorbent polymer on a basis weight of 15 g / m ² ) and wrapping it with a tissue.

  Furthermore, other examples of the material of the thin absorber include an absorbent sheet and a polymer sheet, and the thickness is preferably 0.3 to 5 mm. The absorbent sheet and polymer sheet can be used without particular limitation as long as they are usually used for absorbent articles such as sanitary napkins.

  Examples of the absorbent sheet include absorbent paper, non-woven fabric, and a pulp sheet in which fibers are formed into a sheet with a binder. The polymer sheet is a sheet formed by mixing pulverized pulp and fibers with a particulate polymer into a sheet shape. Etc. In addition, as the sheet formed by mixing the particulate polymer with the fiber to form a sheet, any of those in which the particulate polymer is dispersed in layers and those in which the particulate polymer is dispersed in three dimensions can be used.

  Materials used for the absorbent sheet and polymer sheet include cellulose fibers such as wood pulp, regenerated cellulose fibers such as rayon and cupra, hydrophilic synthetic fibers such as polyvinyl alcohol fibers and polyacrylonitrile fibers, or surface active Polyethylene, polypropylene, polyethylene terephthalate, polyethylene / polypropylene composite fiber, and polyethylene / polyethylene terephthalate composite fiber whose surface has been hydrophilized with an agent or the like are preferred, and cellulose fiber is more preferred from the viewpoint of maintaining good hydrophilicity.

  The particulate polymer used for the polymer sheet is preferably one that can absorb and retain a liquid having a weight 20 times or more of its own weight and can be gelled. Examples thereof include starch, crosslinked carboxymethylated cellulose, polyacrylic acid, Examples thereof include salts thereof and polyacrylate graft polymers.

The absorbent body 30 according to the present embodiment is configured by wrapping a pulp obtained by laminating cotton-like pulp, synthetic pulp, or the like at a basis weight of about 100 to 300 g / m ² with protective paper (not shown). The protective paper is for maintaining the shape of the pulp, and for example, crepe paper or tissue paper can be used.

  The absorber 30 has a shape extending in the front-rear direction, and is approximately one size smaller than the back sheet 20. The length of the absorbent body 30 in the width direction W corresponds to the crotch interval of an adult female and is approximately 50 to 80 mm. The absorber 30 is bonded to the back sheet 20 with an adhesive such as hot melt.

  The side sheets 41 and 42 are disposed on both sides of the top sheet 10. The side sheets 41 and 42 can be selected from the same material as the top sheet 10. However, in order to prevent menstrual blood from flowing over the side sheets 41 and 42 to the outside of the absorbent article 1, it is preferable to have hydrophobicity or water repellency. The side sheets 41 and 42 cover a part of the side edge of the absorber 30 and the wing parts 43 and 44.

  In the absorbent article 1, the periphery of the surface sheet 10, the side sheets 41 and 42, and the back sheet 20 is joined, and the absorber 30 is enclosed. As a method for joining the top sheet 10 and the back sheet 20, any one or a combination of heat embossing, ultrasonic waves, or hot melt adhesive can be used.

  In the back sheet 20, an adhesive (not shown) is applied to the surface in contact with the undergarment in a plurality of regions. The pressure-sensitive adhesive is intermittently disposed along the longitudinal direction L on the back side of the absorber. The adhesive is also provided on the surface in contact with the undergarment in the wing part 43 and the wing part 44. In a state before use, the adhesive is in contact with a release sheet (not shown). The release sheet prevents the adhesive from deteriorating before use. And a peeling sheet peels by a wearer at the time of use.

  In addition, in the absorbent article which does not have a peeling sheet, you may be comprised so that it may prevent that an adhesive deteriorates before use with the packaging sheet which wraps an absorbent article separately. When the adhesive and the packaging sheet are in contact with each other, it is desirable that the surface of the packaging sheet be treated so that the adhesive can be peeled without reducing the adhesive strength of the adhesive.

  In the absorbent article 1, a pressing portion 80 is formed by compressing the topsheet 10 and the absorbent body 30 in the thickness direction. The pressing part 80 is a groove formed by processing the skin contact side of the top sheet of the absorbent article 1 and the non-skin contact side (clothing contact surface side) of the absorbent body 30. .

  The pressing part is formed in a line shape having a predetermined width by a low pressing part and a high pressing part (not shown). The high-pressure squeezed part is compressed with a higher force than the low-pressure squeezed part, and is arranged side by side at intervals, and is configured to form a constant line as a whole. The low-pressure squeezed part is compressed with a force lower than that of the squeezed part, and can be provided in a region including a line shape constituted by a plurality of high-pressure squeezed parts.

  In addition, the pressing part 80 may be formed including the high pressing part and the low pressing part, and the whole may be compressed and formed with the same force. Moreover, the pressing part may be compressed from the top sheet side toward the back sheet side, may be compressed from the back sheet side toward the top sheet side, or from the top sheet side to the back sheet side. The pressing part compressed toward the surface and the pressing part compressed toward the surface sheet side from the back surface sheet side may be formed.

  The position where the pressing part 80 is provided should just be an area | region where the absorber is arrange | positioned. The shape of the squeezed portion 80 is a circle or ellipse in which a certain region is surrounded by a curve, a polygon or circle in which a certain region is surrounded by a plurality of broken lines, or a straight line or curve extending along the longitudinal direction or the width direction. It can be illustrated.

  Dimensions in the thickness direction of the compressed portion 80 (in the form in which the compressed portion is formed on both the skin contact surface side and the clothing contact surface side, the dimensions from the skin contact surface side and the clothing contact surface side of the absorbent body The total depth with respect to the dimension from the above is preferably 0.1 mm or more and 20 mm or less, but may be shallower than the thickness of the absorbent article. Further, the depth of the groove on the skin contact surface side may be 20 to 80% with respect to the thickness of the absorbent article, but 30 to 60 in consideration of the fluidity of the liquid and the deformability with the groove as a fold point. % Is preferred.

  Moreover, the thickness of the high pressure squeezing part and the low pressure squeezing part on the clothing contact surface side of the absorbent body may be 5 to 20% of the thickness of the absorbent article, respectively, and the depth of the low pressure squeezing part is higher than that of the high pressing part Small is enough. If the depth of the pressing portion on the clothing contact surface side is smaller than 5%, the deformability and flexibility of the pressing portion are deteriorated. Moreover, when it becomes larger than 20%, the pressing part itself becomes too deep and becomes fragile.

  Specifically, the depth of the squeezed part in the absorbent article having a thickness of 7 mm is 4 mm for the squeezed part on the clothing contact surface side, 0.2 mm for the squeezed part on the clothing side, and 0.8 mm for the high-pressure squeezed part. Is preferable.

The shape of the squeezed portion on the clothing contact surface side may be a dot shape, a lattice shape, an ellipse shape, etc. Easy. The size of the pressing part is preferably 0.5 mm ² to 100 mm ² , and the pitch of the pressing part is preferably 0.5 mm to 3 mm.

Specifically, the shape of the high-compressed part is diamond-shaped 0.64 mm ² , and the low-compressed part is 1.92 mm ² in the case of a grid surrounding the high-compressed part, and the high-compressed part is repeated at a pitch of 0.8 mm. .

  The processing method of the pressing part 80 includes the following methods, for example. It passes between the embossing rolls which face the up-down direction, and presses it up and down with the said embossing roll, and forms a pressing part. On the contact surface of the upper embossing roll with the skin contact surface side of the absorbent article, a substantially elliptical groove having a continuous depth of one step is disposed. A groove having a step depth is disposed on the contact surface of the lower embossing roll with the clothing contact surface side of the absorbent article.

  In addition, the processing method of a pressing part is not restricted to this, Even if the upper and lower sides of a roll are reversed, the pattern shape of the depth of two steps is changed, or the temperature and the distance between rolls which are embossing conditions are adjusted suitably Good.

  The pressing part 80 is provided around the central area CA including the center of the excretion opening contact area disposed to face the wearer's excretion opening. The pressing unit 80 includes a first longitudinal pressing unit 81, a second longitudinal pressing unit 82, a first width pressing unit 83, and a second width pressing unit 84. FIG. 3 is an enlarged view of the pressing unit 80 in the plan view shown in FIG.

  The center of the excretion opening contact area coincides with the center in the longitudinal direction and the width direction of the central area CA where the wearer's excretion opening contacts. For example, in an absorbent article having a wing portion, the center in the longitudinal direction of the wing portion is the center in the longitudinal direction of the central region. Moreover, in the absorbent article which does not have a wing part, the position where the length dimension of the width direction of an absorber is the shortest becomes the center of the longitudinal direction of a center area | region. The excretory opening contact region is included in a region that contacts the wearer's crotch, and is located between the wearer's legs.

  The 1st longitudinal pressing part 81 is arrange | positioned in the width direction both outer side rather than center area | region CA, and is extended in the longitudinal direction. The 1st longitudinal pressing part 81 is arrange | positioned by a pair at intervals in the width direction. The 1st longitudinal pressing part 81 is provided with the 1st curve part 85 which has the convex shape which goes to the width direction inner side. The 1st curve part 85 is extended in the width direction inner side as it goes to a longitudinal direction center from the longitudinal direction both ends of the 1st longitudinal pressing part 81. As shown in FIG. Therefore, the longitudinal center 81 </ b> CL of the first longitudinal pressing portion 81 is located on the innermost side in the width direction in the first longitudinal pressing portion 81.

  In addition, the 1st longitudinal pressing part may have a 1st curve part, and may be formed in the linear form extended in a longitudinal direction, without having a 1st curve part. Moreover, although the 1st curve part is circular arc shape which goes to the width direction inner side, it does not necessarily need to be circular arc shape.

  The first width pressing portion 83 is provided between the pair of first longitudinal pressing portions 81 so as to connect the first longitudinal pressing portions 81 to each other. Specifically, the first width pressing portion 83 is arranged so as to connect the front end portions of the pair of first longitudinal pressing portions 81, and the rear end portions of the first longitudinal pressing portion 81 are connected to each other. A 1-width compressed portion 83 is arranged. The 1st longitudinal pressing part 81 and the 1st width pressing part 83 are arrange | positioned continuously, and are cyclic | annular in planar view. The center area CA is an area surrounded by the first longitudinal pressing portion 81 and the first width pressing portion 83.

  The 2nd longitudinal pressing part 82 is arrange | positioned rather than the 1st longitudinal pressing part 81 in the width direction both outer side, and is extended in the longitudinal direction. The 2nd longitudinal pressing part 82 is arrange | positioned by a pair at intervals in the width direction.

  The second longitudinal pressing portion 82 is provided with two second curved portions 86 having a convex shape toward the outer side in the width direction continuously in the longitudinal direction. The second curved portion 86 extends outward in the width direction from the both ends in the longitudinal direction toward the center in the longitudinal direction. Therefore, the longitudinal center 86CL of the second curved portion 86 is located on the outermost side in the width direction in each second curved portion, and the longitudinal end 86L of each second curved portion 86 is located in each second curved portion. It is located on the innermost side in the width direction. The second curved portion has an arc shape that extends outward in the width direction, but may not necessarily have an arc shape.

  In the second longitudinal pressing portion 82, two second curved portions 86 are continuously arranged, and the longitudinal end 86L of one second curved portion 86 coincides with the other longitudinal end. The second longitudinal pressing portion 82 is provided with three longitudinal ends 86L of the second curved portion 86.

  Three longitudinal end portions 86L of the second curved portion are provided, and one of them is provided on a center line CACL passing through the center of the central region CA in the longitudinal direction and along the width direction. The absorbent article according to the present embodiment is a daytime napkin, and the longitudinal length of the front region and the longitudinal length of the rear region are the same. It is the longitudinal center of the body and the longitudinal center of the absorbent article 1.

  The second width pressing portion 84 is provided so as to connect the pair of second longitudinal pressing portions 82 between the pair of second longitudinal pressing portions 82. Specifically, in the front region FA of the absorbent article, the second width pressing portion 84 is arranged so as to connect the front end portions of the pair of second longitudinal pressing portions 82, and in the rear region BA of the absorbent article. The 2nd width pressing part 84 is arrange | positioned so that the rear side edge part of a pair of 2nd longitudinal pressing part 82 may be connected. The 2nd longitudinal pressing part 82 and the 2nd width pressing part 84 are arrange | positioned continuously, and are cyclic | annular in planar view. The second longitudinal pressing portion 82 and the second width pressing portion 84 are arranged so as to surround the first longitudinal pressing portion 81 and the first width pressing portion 83.

  The 1st longitudinal pressing part 81 and the 2nd longitudinal pressing part 82 may be formed so that it may incline with respect to the straight line along the longitudinal direction L, the straight line along the longitudinal direction L, and the 1st longitudinal pressing part. The angle (acute angle side) formed by 81 or the 2nd longitudinal pressing part 82 shall be 45 degrees or less. On the other hand, the 1st width pressing part 83 and the 2nd width pressing part 84 may be formed so that it may incline with respect to the straight line along the width direction W, the straight line along the width direction W, and 1st width | variety. The angle (acute angle side) formed by the pressing part 83 or the 2nd width pressing part 84 shall be less than 45 degree | times.

  Moreover, the longitudinal pressing part and the width pressing part may be continued as in the embodiment, or may be spaced apart. Specifically, the first width squeezing part 83 may be disposed away from the first longitudinal squeezing part 81 and outside the first longitudinal squeezing part 81 in the longitudinal direction, or the first longitudinal squeezing part 81. It may be spaced apart and may be arranged inside the first longitudinal pressing portion 81 in the width direction. In addition, the second width pressing part 84 may be spaced apart from the second longitudinal pressing part 82, and may be disposed on the outer side in the longitudinal direction than the second longitudinal pressing part 82, or may be spaced apart from the second longitudinal pressing part 82. In addition, the second longitudinal pressing portion 82 may be disposed on the inner side in the width direction.

  Further, the radius of curvature of the first curved portion 85 is larger than the radius of curvature of the second curved portion 86, and the convex portion of the first curved portion 85 is a gentler curve than the convex portion of the second curved portion 86. In plan view, the distance between the first longitudinal pressing portion 81 and the second longitudinal pressing portion 82 is closest at the longitudinal end portion of the second curved portion 86 and is most separated at the longitudinal center of the second curved portion 86. . FIG. 3 illustrates a distance D1 between the longitudinal end portion of the second curved portion and the first longitudinal compressed portion, and a distance D2 between the longitudinal center of the second curved portion and the first longitudinal compressed portion.

  The length in the width direction of the second longitudinal pressing portion 82 is longer than the length in the width direction of the first longitudinal pressing portion 81. FIG. 3 illustrates the width direction length W1 of the first longitudinal pressing portion and the width direction length W2 of the second longitudinal pressing portion.

  Subsequently, the deformation | transformation aspect of the absorbent article comprised in this way is demonstrated. FIG. 4 is a diagram schematically showing a deformation mode in a state where the absorbent article 1 is attached to the underwear S. FIG. 4 (A) shows a state before deformation, and FIG. 4 (B) shows a state where the absorbent article is sandwiched between both legs and the like, and the absorbent article is pressed from the outer side in the width direction toward the inner side in the width direction. Deformed state.

  The pressing part 80 is formed by compressing at least the top sheet 10 and the absorber 30 in the thickness direction, and is a relatively hard part. Therefore, in the state shown in FIG. 4A, when a force is applied to the absorbent article 1 toward the inner side in the width direction, the force is propagated to the inner side in the width direction via the second longitudinal pressing portion 82. At this time, the width direction inner side edge part of a 2nd longitudinal pressing part is the longitudinal direction edge part 86L of the 3nd 2nd curve part 86, and when force is applied to the 2nd longitudinal pressing part 82, three places The force concentrates on the longitudinal end 86L of the second curved portion, and the stress propagates by dispersing from the longitudinal end 86L of the second curved portion.

  For example, if the widthwise inner end portion is one place in the second longitudinal pressing portion, stress concentrates on the one place, and the concentrated portion may be locally deformed. For example, if stress concentrates in one central position in the longitudinal direction of the excretory opening contact area, the width in the longitudinal center of the excretion opening contact area is locally shortened, and the absorbent body can be disposed facing the excretion opening. There is a risk that body fluid leaks or the absorber 30 is cured.

  However, force is applied to the longitudinal end portions 86L of the three second curved portions, and the stress is dispersed and propagated, so that stress concentration can be suppressed. Therefore, even if it is a case where durability of an absorptive article is improved and absorptive article 1 is used for a long time, hardening of an absorber is controlled or width of only an excretion mouth contact field becomes short. It can be suppressed.

  Moreover, the force which goes to the width direction inner side from the width direction inner side outer side propagates to the 1st longitudinal pressing part 81 via the 2nd longitudinal pressing part 82, and central area CA is width direction inner side via the 1st longitudinal pressing part 81 Pressed. At this time, since the central area CA is lower in rigidity than the first longitudinal pressing portion 81 and the second longitudinal pressing portion 82 and easily deforms, it is pressed inward in the width direction via the first longitudinal pressing portion and the second longitudinal pressing portion. It is raised on the skin contact surface side of the wearer. FIG. 4 (B) is a diagram showing a state of protruding to the wearer side. When the central area CA is raised on the wearer side, the absorbent body can be disposed close to the wearer, and body fluid can be absorbed quickly.

  Further, a plurality of end portions in the longitudinal direction of the second curved portion are arranged, and each is located displaced in the longitudinal direction, so even if the absorbent article is arranged displaced on the front side or the rear side, The absorber can be compressed inward in the width direction while stress is dispersed at the end portion in the longitudinal direction of any of the second curved portions.

  Moreover, the longitudinal direction edge part of the 2nd curved part 86 is located in the width direction inner side edge part of the 2nd longitudinal pressing part 82, and the distance with the 1st longitudinal pressing part 81 becomes short. The longitudinal end portion of the second curved portion 86 is closer to the first longitudinal pressing portion 81 and the second longitudinal pressing portion 82 than the front and rear portions thereof, and has relatively high rigidity. Thus, by comprising the rigidity of the longitudinal direction edge part of the 2nd curve part 86 which is easy to apply force, a deformation | transformation of a 2nd longitudinal pressing part can be suppressed, and durability of an absorbent article can be improved. .

  Moreover, since the 1st width pressing part 83 and the 2nd width pressing part 84 which are extended in the width direction are provided, when the force which goes to the width direction inner side is applied from the width direction outer side, it deform | transforms into the width direction inner side. It can suppress and hardening of an excretion opening | mouth contact | abutting area | region can be suppressed. In particular, by providing the second width pressing portion that connects the second longitudinal pressing portion located on the outer side, an annular pressing portion is provided on the outer side, and the outer shape of the product is easily maintained. Furthermore, the stress which goes inside from the width direction outer side can be disperse | distributed along a cyclic | annular pressing part, and partial hardening can be suppressed.

  Moreover, by providing the 1st width pressing part 83 which connects the 1st longitudinal pressing part 81, when the force which goes to the width direction inner side is applied from the width direction outer side, it suppresses that it deform | transforms into the width direction inner side, and an excretion mouth Curing of the contact area can be suppressed.

  Since the curvature radius of the 1st curve part 85 is smaller than the curvature radius of the 2nd curve part 86, the direction of a 1st longitudinal pressing part becomes a gentle curve rather than a 2nd longitudinal pressing part. Therefore, local concentration of stress, such as the center in the longitudinal direction of the excretory opening contact region, is suppressed, and it becomes easy to raise the entire area between the first longitudinal pressing portions, and the absorber is cured by local stress concentration. Can be suppressed.

  One of the ends in the longitudinal direction of the plurality of second curved portions passes through the center of the central region in the longitudinal direction and is disposed on the center line CACL along the width direction. The center position of the contact area can be grasped and can be used as a guide when mounting. Therefore, the wearer can easily place the absorbent article at the correct position, and can prevent the wearing position from shifting. By appropriately arranging the absorbent article, the designed absorption performance can be exhibited.

  Since the width of the second longitudinal pressing portion is longer than the width of the first longitudinal pressing portion, when a force is applied from the side of the absorber, the second longitudinal pressing portion is easily maintained in a flat state, The center of the absorber can be raised with the side of the absorber facing the excretion opening of the wearer.

  In addition, the hardness of an absorbent article etc. can be measured using the Gurley method prescribed | regulated to JIS-1096, for example. Moreover, the fabric weight and density of an absorber can be measured with the following measuring methods, for example. In the absorbent article packaged by the packaging body, the packaging body is opened, the folded absorbent article is developed, and the thickness and area of the portion where the basis weight and density are measured are measured. Subsequently, the part which measures a fabric weight and a density is cut out from an absorbent article, and the weight of the cut-out part is measured. Next, parts other than the absorber, such as the top sheet and the back sheet, are removed from the cut out part, and the weight of the absorber is measured. The basis weight is calculated based on the weight of the absorbent body and the area of the portion where the basis weight and density are measured. The density is calculated based on the basis weight and thickness.

  The thickness can be measured by the following measurement method. Specifically, after the sample absorbent article was impregnated with liquid nitrogen and frozen, it was cut with a razor and returned to room temperature, and then it was magnified 50 times using an electron microscope (for example, KEYENCE VE7800). Measure with magnification. Here, the reason why the absorbent article of the sample is frozen is to prevent the thickness from fluctuating due to compression during cutting.

  Next, a part of manufacturing method of the absorbent article 1 according to the embodiment will be described. In addition, about the method which is not demonstrated, the existing method can be used. The manufacturing method of an absorbent article performs a surface sheet production | generation process as a 1st step.

  Next, as a second step, a surface sheet joining step is performed. Specifically, the top sheet and the side sheets 41 and 42 are bonded by, for example, heat welding.

  As a third step, an absorber molding process is performed. Specifically, the absorber 30 is formed by molding pulp as a material of the absorber with a molding drum. In addition, a reverse order may be sufficient as the order of the manufacturing process of the surface sheet of a 1st step and a 2nd step, and the absorber molding process of a 3rd step.

  In the fourth step, a joining process is performed. Specifically, the joining process which joins the absorber shape | molded in the 3rd step, and the surface sheet and side sheet which were joined in the 2nd step is performed.

  In the fifth step, a pressing process is performed. Specifically, the absorber 30 and the topsheet 10 are compressed in the thickness direction to form the squeezed portion 80.

  In the sixth step, a back sheet joining step is performed. Specifically, the absorber, the top sheet, and the like that have formed the compressed parts are joined to the back sheet. After joining the back sheet, a step of applying an adhesive is provided. The absorbent article which concerns on this Embodiment can be manufactured according to said process.

  Although the contents of the present invention have been disclosed through the embodiments of the present invention as described above, it should not be understood that the descriptions and drawings constituting a part of this disclosure limit the present invention. From this disclosure, various alternative embodiments, examples, and operational techniques will be apparent to those skilled in the art.

  For example, the pressing part may have at least the first longitudinal pressing part and the second longitudinal pressing part, and may not include the first width pressing part and / or the second width pressing part. Moreover, 3 or more may be sufficient as the 2nd curve part of a 2nd longitudinal pressing part.

  The 1st longitudinal pressing part may be arranged not only in the 1st curve part but in the shape of a straight line, and may have a straight part. The 2nd longitudinal pressing part may have not only the 2nd curve part but the straight part arranged in the shape of a straight line.

  The absorbent article is not limited to a sanitary napkin, and may be an absorbent pad or a panty liner. Further, for example, in the absorbent article, a gather may be formed at the outer end in the width direction of the absorbent body.

CA ... Central area FA ... Front area BA ... Rear area L ... Longitudinal direction S ... Underwear T ... Thickness direction W ... Width direction 1 ... Absorbent article 10 ... Top sheet 20 ... Back sheet 30 ... Absorber 41, 42 ... Side Sheet 43, 44 ... Wing part 80 ... Squeezing part 81 ... First longitudinal pressing part 82 ... Second longitudinal pressing part 83 ... First width pressing part 84 ... Second width pressing part 85 ... First curve part 86 ... Second curve Part

Claims (8)

It has a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber disposed between the top sheet and the back sheet, and the top sheet and the absorber are made of the absorbent article. An absorbent article formed with a compressed portion compressed in the thickness direction,
The compressed parts are arranged on both outer sides in the width direction of the absorbent article with respect to the center area including the center of the excretory opening contact area arranged to face the excretion opening of the wearer, and the length of the absorbent article A pair of first longitudinal pressing portions extending in the direction, and a pair of second longitudinal pressing portions disposed on both outer sides in the width direction than the first longitudinal pressing portion and extending in the longitudinal direction,
A plurality of curved portions having a convex shape toward the outside in the width direction are continuously provided in the second longitudinal pressing portion in the longitudinal direction,
An end portion in the longitudinal direction of the curved portion is provided on a center line passing through the longitudinal center of the central region and along the width direction,
An end in the longitudinal direction of each curve part is arranged in the width direction inside rather than an outside end part in the width direction of each curve part, An absorptive article characterized by things. The first longitudinal pressing portion is provided with a first curved portion having a convex shape toward the inner side in the width direction,
The curved part of the second longitudinal pressing part is a second curved part having a convex shape toward the outside in the width direction,
The absorbent article according to claim 1, wherein an end portion in the longitudinal direction of each of the second curved portions is disposed on an inner side in the width direction than an outer end portion in the width direction of each of the second curved portions. The first curved portion of the first longitudinal pressing portion has a circular arc shape that is convex inward in the width direction,
The second curved portion of the second longitudinal pressing portion has a circular arc shape that is convex inward in the width direction,
The absorbent article according to claim 2, wherein a radius of curvature of the first curved portion is smaller than a radius of curvature of the second curved portion.   The said pressing part is an absorbent article in any one of Claims 1-3 provided with the width pressing part extended in the width direction of the said absorbent article.   The absorptive article according to claim 4 with which said width pressing part is provided with the 2nd width pressing part which connects said pair of 2nd longitudinal pressing parts.   The absorptive article according to claim 3 or 4 with which said width pressing part is provided with the 1st width pressing part which connects said pair of 1st longitudinal compression parts.   The absorbent article according to any one of claims 1 to 6, wherein a length of the second longitudinal pressing part in the width direction is longer than a length of the first longitudinal pressing part in the width direction.   When the force which goes to the said width direction inner side from the said width direction outer side is applied with respect to the said center area | region, the said center area | region is the said width direction via the said 1st longitudinal compression part and the said 2nd longitudinal compression part. The absorptive article according to any one of claims 1 to 7, wherein the absorbent article is configured to be pressed to the inside and to be raised on the skin contact surface side of the wearer.

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