KR20050009736A - Absorbing article - Google Patents

Abstract

An object of the present invention is to provide an absorbent article composed of a plurality of sheets superimposed on each other. The article is longitudinally formed to have side edges 1a and 1b extending in the longitudinal direction and short edges 1c and 1d facing in the longitudinal direction. In the range of the predetermined length La extending longitudinally across the horizontal center line Ox-Ox of the article, a plurality of crimping portions of the first group are provided inside the respective side edge portions 1a and 1b. The crimping portions of the first group are arranged in a line along the shapes of the respective side edges 1a and 1b at appropriate intervals, and non-compression regions remain on both sides of the row.

Description

Absorbent article {ABSORBING ARTICLE}

Mark of related application

This application is filed by claiming priority based on Japanese Patent Application No. 2002-167948, filed June 7, 2002. The disclosure of the Japanese patent application is incorporated as part of the disclosure of the present specification.

Technical field

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to absorbent articles called panty liners, absorbent sheets for absorbing menstrual blood, urinary incontinence sheets for incontinence, and also absorbent articles for use as sanitary napkins for absorbing menstrual blood on days of mild menstruation. An absorbent article adhered to underwear.

Background technology

Absorbent sheets called pantiliners are widely used as thin absorbent articles for absorbing secretions and acupuncture points. This absorbent sheet is worn by adhesive fixing to the inside of the crotch portion of the underwear through a pressure-sensitive adhesive layer. This conventional absorbent sheet generally has a structure in which a thin absorbent layer such as laminated tissue paper or airlaid pulp is interposed between a liquid-impermeable back sheet and a surface sheet formed of a spunlace nonwoven fabric or the like.

This type of absorbent sheet is thin, and it is preferable that the wearer can feel the softness equivalent to that of the underwear, but also the twisting and deformation do not easily occur due to the movement of the thigh in the worn state, so that the surface of the liquid receiving side is always It is necessary to be able to remain in close contact with the excretory organs of the wearer's body.

However, this kind of panty liner is less frequently exchanged per day compared to a sanitary napkin or the like that is usually used, and it is common to use one panty liner for a long time. Therefore, strain stress acts on the pantiliner continuously for a long time due to the movement of the thigh part during use, so that kinks and deformations are likely to occur. If such wrinkles or deformations become remarkable, the surface area is substantially reduced, the absorbing capacity of the liquid is lowered, the adhesion with the excretory organs is lowered, and the problem that the excretion liquid cannot be reliably captured is likely to occur.

As a focus on such modifications, Japanese Patent Laid-Open No. 2001-276126, for example, discloses a pantiliner in which an elastic layer is sandwiched between a surface sheet and an absorber. In addition, the panty liner is compression-fixed by a plurality of compression parts formed inside the front sheet, the absorbing layer, the elastic layer, and the leakage preventing sheet located on the rear side of the panty liner. The pantyliner utilizes the elastic force of the elastic layer and imparts elastic restoring force to the twist caused in the worn state, thereby preventing the twist from occurring and thereby improving wearability.

However, as described above, even when the pantiliner having an elastic layer is moistened with the absorbed body fluid, if the deformable force is repeatedly applied from both sides, the force propagates directly to the central region. It is difficult to prevent large wrinkles or deformations over the area.

Further, in the panty liner described in the above publication, since the compression portions disposed inward from both side edges of the panty liner are formed with a relatively large area and a wide interval, the wrinkles and deformations extend between adjacent compression portions and are centered. Easy to reach area Moreover, since each said compression part has a comparatively large area, if this compression part is made rigid, this compression part may come into contact with a female machine, and a wearer may feel a sense of incongruity, and it will become inferior to a wearing feeling.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned drawbacks in the prior art, and does not interfere with the overall softness and does not easily propagate pressure from the thigh to the central area, thereby making it easier to cause deformation such as twisting or wrinkles. It aims to provide goods.

Disclosure of the Invention

In the first aspect of the present invention, there is provided an absorbent article formed of a plurality of sheets superimposed on each other and formed longitudinally long so as to have side edges extending in the longitudinal direction and short edges facing in the longitudinal direction,

In the range of the predetermined length extending in the longitudinal direction across the horizontal center line of the article, a plurality of crimping portions of the first group are provided inside the respective side edges,

The crimping portions of the first group are arranged in a line along the shape of the respective side edges at appropriate intervals, and non-compression regions are left on both sides of the row.

When the absorbent article is worn such as adhered to the inner surface of the crotch portion of the underwear, the pressure from the thigh portion acts on both side edges. Since each of the side edges is spaced apart from each other so as to form a row along each side edge, and non-compression areas are left on both sides thereof, the remaining non-compression parts and the rows of adjacent non-compression parts arranged along the row are separated from each other. Due to the difference in stiffness and thickness between the non-compression region extending to both sides and the individual compression portions, minute deformation occurs between the compression portion and the non-compression portion and the non-compression region. Since the energy of the pressure is absorbed by this minute deformation, it is difficult for the pressure from the outside to exert a great influence on the central region of the article. Therefore, deformation | transformation, such as a wrinkle and a twist, can be prevented in a center area | region.

As described above, in order to absorb the pressure acting on the both edges by the minute deformation of the inner side of the both edges, the interval between adjacent crimping portions in the row is 0.5 to 5 mm, and the area of the bottom surface of the crimping portion is 0.25 to 6 It is preferable that it is mm <2>.

When the area is within the above range, at least some of the crimped portions of the first group have a bottom surface of a circle, an ellipse or a polygon, and are preferably arranged at a constant pitch along the row. However, a crimping | compression-bonding part is not limited to the said shape, Other shapes, such as a star shape and a moon shape, may be sufficient.

In this invention, it is preferable that each said side edge part is a concave curve shape, and the said heat conduction concave curve shape which a crimping | compression-bonding part of a said 1st group comprises is carried out.

In this case, the pressure from the thigh acts on the edge of the concave curve, but since the crimp is arranged along the concave curve, the pressure from the thigh and the individual crimp and adjacent crimps are arranged along the concave curve. It can absorb in the non-compression part in between.

Moreover, it is preferable that the some crimp part of a 2nd group is provided inside the crimp part of the said 1st group, and the non-compression area | region is left between the crimp part of a 1st group and the crimp part of a 2nd group.

In this structure, the deformation force that is intended to act on the central region beyond the crimping portions of the first group forming a row can be prevented by the crimping portions of the second group, and it is easier to prevent the occurrence of wrinkles and kinks in the central region. Lose.

It is preferable that the area of the bottom face of the crimping | compression-bonding part of this 2nd group is also 0.25-6 mm <2>.

In the second aspect of the present invention, there is provided an absorbent article which is formed of a plurality of sheets superimposed on each other, and is formed vertically long so as to have side edges extending in the longitudinal direction and short edges facing in the longitudinal direction,

A plurality of said partitions are provided in the said side edge part inside the non-compression | divided area | region of the predetermined area which is respectively enclosed by the some crimping | compression-bonding part, and extends longitudinally across the horizontal centerline of the article. Regions are arranged along each side edge.

In this absorbent article, when pressure is applied from the thigh to both edges, the stress propagates to the central region due to the slight deformation caused by the difference in rigidity between the individual pressing portions and the non-pressing portions remaining between the adjacent pressing portions. Not only can it be prevented, but also the non-compression partition area | region which is enclosed by the some crimp part, and each sheet | seat is elastically deformable exerts an absorption function with respect to the pressure from the outside, and wrinkles, kinks, etc. The deformation of is not easily propagated to the central region.

In this case, it is preferable that the plurality of partition regions arranged along each side edge portion have the same shape and the same area.

If comprised in this way, a partition area can exhibit the equal external pressure absorption effect, and can make a favorable appearance regarding a design.

Also in this case, it is preferable that at least some of the plurality of crimps surrounding the partition area have a bottom surface of a circle, an ellipse, or a polygonal shape, and the area of the bottom surface of the crimped portion is 0.25- 6 mm 2. desirable.

If the minimum dimension in the transverse direction of the non-compression region sandwiched by the crimping portion located inside the one side edge and the crimping portion located inside the other side edge is 20 mm or more, the crimping portion is difficult to impart rigidity to the female part. Become. In addition, in view of the above-described external pressure absorbing effect, when the absorbent article is used as the secretion absorbing liner, the minimum dimension is preferably 20 to 35 mm.

In the non-compression region sandwiched by the crimping portion located inside the side edge and the crimping portion located inside the other side edge, the sheet exposed on the outermost surface of the article is molded, so that the furrow and the groove extend in the longitudinal direction. It is also preferable in the present invention to be alternately formed in the horizontal direction.

As described above, if at least the center of the surface is in the shape of a groove, the center area is made soft, and the irritation at the time of contacting the wearer's body can be reduced. Thus, even if the center region is soft, since the pressure acting on both side edges is easily absorbed by the crimping portion, it is easy to prevent large wrinkles or kinks from occurring in the soft central region.

Brief description of the drawings

While the invention is to be understood in greater detail from the following detailed description and accompanying drawings, the invention is not limited to the invention but merely for the purpose of illustration and understanding.

In the drawings,

1 is a plan view showing an absorbent sheet as an absorbent article according to a first embodiment of the present invention.

FIG. 2 is a half sectional view taken along the line II-II of FIG. 1; FIG.

3 is a partially enlarged view of the cross-sectional view of FIG.

Fig. 4A is a partial plan view of Fig. 1 showing an arrangement pattern of crimping portions of one side fixing part.

4B is an enlarged plan view of a portion thereof further;

5 is a plan view showing an absorbent sheet according to a second embodiment of the present invention.

6 is a plan view showing an absorbent sheet according to a third embodiment of the present invention.

7 is a plan view showing an absorbent sheet according to a fourth embodiment of the present invention.

8 is a plan view showing an absorbent sheet according to a fifth embodiment of the present invention.

9 is a plan view showing an absorbent sheet according to a sixth embodiment of the present invention.

Best Mode for Carrying Out the Invention

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail with reference to the accompanying drawings, in which preferred embodiments of the present invention are described. In the following descriptions, many specific details are given for a thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced without these specific details. In addition, in order to prevent this invention from becoming unclearly unnecessary, a well-known structure is not shown in detail.

Fig. 1 is a plan view showing an absorbent sheet (referred to as pantiliner) 1 for absorbing secretions or acupuncture points toward the surface side as a thin absorbent article according to a first embodiment of the present invention, and Fig. 2 is a horizontal center line. Half cross-sectional view showing the right half of the cross section of the absorbent sheet 1 seen in the direction of the arrow II by cutting (Ox-Ox; dividing the absorbent sheet shown in FIG. 1 in the longitudinal direction), and FIG. 3 is shown in FIG. 4A and 4B show an arrangement pattern of the crimp section in one side fixing section, showing the structure of the crimp section revealed in the half section.

The absorbent sheet 1 shown in this embodiment is a thin absorbent article used by a woman as being integral to the inner surface of the crotch portion of the undergarment and integrated with the undergarment. The absorbent sheet 1 absorbs secretions excreted by the woman or menstrual blood at the start of menstruation. It is intended to do. In addition, the thin absorbent article of the present invention can be used as a woman to adhere to the inner surface of the crotch portion of the underwear so as to absorb minute urine during urinary incontinence.

As shown in the plan view of FIG. 1, the absorbent sheet 1 has a longitudinally long shape, the right edge 1a and the left edge 1b extending in the longitudinal direction, and the shear edge 1c facing in the longitudinal direction. ) And trailing edge 1d. The right edge 1a and the left edge 1b are concave, and when the absorbent sheet 1 is attached to the inside of the crotch portion of the underwear, the right edge 1a and the left edge 1b are the legs of the underwear. Follow the edge of the opening. In addition, the front edge 1c and the rear edge 1d are convexly curved.

As shown in the plan view, the absorbent sheet 1 has a left-right symmetrical shape with respect to the longitudinal center line (Oy-Oy) and a symmetrical shape back and forth with respect to the horizontal center line (Ox-Ox). However, this kind of absorbent sheet 1 may not have a symmetrical shape back and forth with respect to the horizontal center line Ox-Ox. Even with this asymmetrical absorbent sheet, it is possible to adopt the following structure.

As shown in FIG. 2, the absorbent sheet 1 has a main body portion 2, which is a back sheet 3, an intermediate sheet 4 provided on the back sheet 3, and the intermediate sheet 4. ) Is a laminate of surface sheets 5 provided above.

As shown in FIG. 2, the pressure sensitive adhesive layer 6 for fixing to an underwear is provided in the back surface of the said main-body part 2, ie, the outer surface of the said back seat 3. As shown in FIG. The pressure-sensitive adhesive layer 6 is provided in a parallel band shape spaced apart from each other in the width direction (X direction) while extending linearly in the longitudinal direction (Y direction). Before use, the outer surface of the pressure-sensitive adhesive layer 6 is covered with the release sheet 7.

When viewed from above, the back sheet 3, the intermediate sheet 4, the surface sheet 5 and the release sheet 7 are the same shape. In the manufacturing process, the back sheet 3, the intermediate sheet 4, the surface sheet 5, and the release sheet 7 are cut out after overlapping, and as shown in FIG. 1, the right edge 1a and the left edge ( 1b), the front edge 1c and the rear edge 1d are formed.

In this embodiment, the said right edge 1a and the left edge 1b are concave-curve in the range of the dimension La of a vertical direction. In the range of La, the right side fixing part 10 is formed inside the right edge 1a. In this right side fixing part 10, the crimping | compression-bonding part is arrange | positioned so that the concave curve shape of the said right edge 1a may be followed. Similarly, in the range of La, the left fixed part 11 in which the crimping | compression-bonding parts are arranged so that the concave curve shape of the left edge 1b may be provided inside the left edge 1b may be formed.

Inside the front edge 1c, a front fixing part 12 in which crimps are arranged along the convex curve of the front edge 1c is provided, and inside the rear edge 1d, the rear edge 1d. The rear fixing part 13 in which the crimping parts are arranged so as to follow the convex curve shape of) is provided.

The back sheet 3, the intermediate sheet 4, and the surface sheet 5 forming the main body 2 are coated in a pattern such as mesh, comb or spiral so as not to impede the penetration and absorption of the liquid. And are fixed to each other by a hot melt adhesive, and in the right side fixing portion 10, left side fixing portion 11, front fixing portion 12 and rear fixing portion 13, sheets are heated and pressed together. More fixed.

The back sheet 3 is liquid impermeable, for example a thin polyethylene film having a basis weight in the range of 21 to 25 g / m 2. Specifically, this film can be formed by melt-extruding a polyethylene resin containing an inorganic filler, and further stretching such that a plurality of minute vent holes are formed by the presence of the inorganic filler. Alternatively, the back sheet 3 may be a hydrophobic spunbond nonwoven fabric or a point bond nonwoven fabric, and a breathable resin film may be laminated if necessary.

The intermediate sheet 4 has a liquid absorbing function, for example, a spunlace nonwoven fabric, which is 55 mass% of a rayon fiber having a fineness of 1.38 dtex and a 44 mm fiber length, and having a fineness of 1.43 dtex and a fiber length of 38 mm as a hydrophilic fiber. Contains 30% by mass of polyester fibers and 15% by mass of polypropylene fibers having a fineness of 1.65 dtex and a fiber length of 45 mm. This unit weight can be 30-50 g / m <2>.

The surface sheet 5 is formed of two liquid permeable nonwoven fabrics of the first surface sheet 5a and the second surface sheet 5b.

Both the first surface sheet 5a and the second surface sheet 5b can be spunbonded nonwoven fabric formed of polypropylene resin fibers having a fineness of 1.98 to 2.64 dtex, and the first surface sheet 5a has a unit weight of 20 It is the range of -25 g / m <2>, and the 2nd surface sheet 5b has a unit weight of 20-30 g / m <2>. This spunbond nonwoven fabric may have a large number of liquid permeation holes.

As shown in FIG. 1, the first surface sheet 5a has a groove width forming region that is in a range of a predetermined width Wa that is symmetrical with respect to the longitudinal center line (Oy-Oy) and extends in a strip shape in the longitudinal direction. (15) is provided. As shown in FIG. 2, in the furrow groove forming region 15, the furrow portions 15a and the groove portions 15b extending over the entire length of the longitudinal direction of the surface sheet 5a are arranged at a constant pitch in the horizontal direction. Alternatingly formed.

The height of the furrow 15a (ie, the dimension of the substantial height of the first surface sheet 5a in the furrow groove forming region 15 minus the thickness of the first surface sheet 5a) is 0.3-2 mm. It is a range and the furrow part 15a and the groove part 15b are arrange | positioned at the pitch of 1-3 mm. The width dimension Wa of the furrow groove forming region 15 is 15 to 35 mm.

The furrow groove forming region 15 extends over the entire length of the first surface sheet 5a in the longitudinal direction within the predetermined width Wa while being provided in the center portion, thereby reducing the stimulus when it comes into contact with the female machine. It can be done and it becomes the thing excellent in a wearing feeling.

The front surface of the second surface sheet 5b is a groove groove forming region 16. As shown in FIG. 2 and FIG. 3, also in this furrow groove forming region 16, the furrow portion 16a and the groove portion 16b extending over the entire length of the second surface sheet 5b are horizontally disposed. It is formed alternately at a constant pitch. The preferred range of the height dimension of the furrow portion 16a in the groove groove forming region 16 of the second surface sheet 5b and the pitch of the groove groove 16a and the pitch of the groove portion 16b are the first range. 1 is the same as the groove groove forming region 15a of the surface sheet 5a.

Thus, by providing the groove groove forming region 16 on the entire surface of the second surface sheet 5b, even when the entire body portion 2 is made thin and the intermediate sheet 4 has a high density structure, the surface Cushionability at the side can be improved. In addition, by providing the groove groove forming regions 15 and 16 in the first surface sheet 5a and the second surface sheet 5b, the central region of the absorbent sheet 1 can be made soft, and this portion is an undergarment. It is easy to follow the deformation of the crotch part of. Therefore, the degree of adhesion to the female phase is enhanced, and discomfort is not easily felt during wearing.

The spun bond nonwoven fabric is formed between the groove groove forming areas 15 and 16 and a pair of rolls having concavo-convex along the groove groove shape and interlocked with each other. The furrow and the groove are shaped into the nonwoven fabric by this heating and pinching.

As shown in FIG. 4A and FIG. 4B, the said right side fixing part 10 is formed by arrange | positioning the crimping | compression-bonding part from which three kinds of size and / or shape differ. The crimping portion is composed of a small circular first crimping portion 21, a second crimping portion 22 having a diameter slightly larger than that of the first crimping portion 21, and a third crimping portion 23 having a crescent shape.

The first crimping portion 21, the second crimping portion 22, and the third crimping portion 23 are formed by thermal embossing. That is, a roll having a smooth surface is applied to the outer surface of the back sheet 3, an embossing roll having projections according to the pattern of the crimping portion is applied to the first surface sheet 5a, and the main body 2 is 120. It is pinched between the said rolls heated at more than C, and thermally embossed.

2 and 3 are cross-sectional views of the first pressing portion 21. As shown in this cross-sectional view, the first crimping portion 21 has a bottom surface 21a, which is flattened by the thermal embossing. In addition, since the back sheet 3, the intermediate sheet 4, and the surface sheet 5 contain a thermoplastic material, the thermoplastic material is melted on the bottom surface 21a, and the bottom surface 21a is made of fiber. Unevenness | corrugation is smoothed so that it may not be revealed, and the surface of the bottom surface 21a becomes substantially equivalent to the film surface.

As described above, in order for the bottom surface 21a to become a smooth film surface, it is preferable that the thermoplastic material is contained in the surface sheet 5. However, unless the bottom surface 21a of the crimping portion is a smooth film surface, the thermoplastic sheet may not be contained in the surface sheet 5. For example, when the surface sheet 5 is formed of cellulose fibers or the like, and thermal welding is impossible, the bottom surface of the surface sheet 5 is bonded to the lower layer with a hot melt adhesive to perform thermal embossing. The crimp can be formed.

The same applies to the second crimping portion 22 and the third crimping portion 23, and the second crimping portion 22 has a circular bottom surface 22a having a smooth surface, and the third crimping portion 23 also has a surface. It is possible to have the smoothed crescent bottom surface 23a.

As shown to FIG. 4A, in the said right side fixing part 10, the some crimp part of the 1st group is arranged in a line along the row | line L1 which follows the concave curve shape of the right edge 1a. In the plurality of crimping portions of the first group, the first crimping portion 21 and the third crimping portion 23 are regularly arranged. The row L1 in which the crimping portions of the first group are arranged has a concave curve shape similar to that of the right edge 1a, and its radius of curvature is 120 to 300 mm. 3, the width dimension from the right edge 1a to the edge of the bottom surface 21a of the first crimping portion 21, that is, from the right edge 1a to the right fixing portion 10. The width dimension Wb of the non-compression region in between is about 1 to 8 mm.

In this embodiment, the first group of pressing portions in a pattern in which three first pressing portions 21 and one third pressing portion 23 arranged at intervals are repeated at a constant pitch along the column L1. And are arranged in a line along the column L1.

Moreover, in the right side fixing part 10, the crimping | compression-bonding part of a 2nd group is arrange | positioned along row L2 inside the row L1 of the said crimping | compression-bonding part of a said 1st group. In this crimp part of the second group, the first crimp part 21 and the second crimp part 22 are regularly arranged along the row L2. In this embodiment, the crimping portion of the second group is arranged such that the five first crimping portions 21 and one second crimping portion 22 arranged at intervals are regularly repeated along the row L2. Moreover, the 2nd crimping | compression-bonding part 22 which comprises the 2nd group crimping | compression-bonding part is adjacent to the moon-shaped 3rd crimping | compression-bonding part 23 which comprises the 1st group | compression bonding part.

The row L2 in which the crimping portions of the second group are arranged has a shape in which the arch R1 is expanded in the longitudinal direction between the adjacent second crimping portions 22 toward the longitudinal center line Oy-Oy. As an example, on the arch R1, the first crimping portions 21 are arranged at regular pitches at intervals.

Then, the first crimping portion 21 and the third crimping portion 23, which are the crimping portions of the first group arranged along the row L1, and the second group arranging along the arch R1. The partition area 24 is defined by the 1st crimping part 21 and the 2nd crimping part 22 which are crimping | compression-bonding parts. In this partition area | region 24, the back seat | sheet 3, the intermediate sheet | seat 4, The first surface sheet 5a and the second surface sheet 5b remain uncompressed even after the embossing. However, as mentioned above, in the said partition area | region 24, the said back sheet 3, the intermediate sheet 4, the 1st surface sheet 5a and the 2nd surface sheet 5b are mesh-shaped, They are adhered to each other by a hot melt adhesive coated in a pattern such as a comb teeth or a spiral.

In the row L2, since the arch R1 is formed to be repeated in the vertical direction, in the right side fixing part 10, the plurality of partition regions 24 having the same area are the side edge portions 1a. It is installed repeatedly along. Moreover, the 2nd press part 22 and the 3rd press part 23 are located between the adjacent division areas 24, and the adjacent area | region area 24 is formed adjacent to each other by sandwiching these press parts.

The horizontal dimension Wc at the bottom of each of the first crimping portion 21, the second crimping portion 22, and the third crimping portion 23 shown in FIG. 3 is the groove portion 15a. It is preferable that it is equal to or less than the pitch, and it is the range of 0.5-2.5 mm, and it is preferable that the area of the bottom face of a crimping | compression-bonding part is 0.2-25 mm <2>. When the horizontal dimension of the crimp portion is in the above range, is less than or equal to the pitch of the furrows 15a, and the area thereof is in the above range, the presence of the crimp portion is not easily felt during wearing. In this invention, the furrow part 15a and the groove part 15b may be formed in the whole surface of the 1st surface sheet 5a, and in this case, if the horizontal dimension of a crimp part is in the said range, a furrow part will exist by presence of a crimp part. The probability that the 15a is crushed is lowered so that the presence of the crimp is not easily felt during wearing.

In addition, the interval δ of the crimping portion of the first group along the row L1 and the spacing δ of the crimping portion of the second group along the row L2, that is, the non-compression portion located between the adjacent crimping portions along the row L1. It is preferable that the dimension δ of (10a) and the dimension δ of the non-compression part 10b located between the adjacent compression parts along the row L2 are about 0.5 to 5 mm. Further, the maximum distance Wd in the horizontal direction of the crimp portion of the first group and the crimp portion of the second group is preferably 3 to 8 mm, and the area of the partition region 24 is preferably in the range of 15 to 50 mm 2. . If it is this range, the force acting on both edge parts 1a and 1b by the elastic deformation force of the partition area | region 24 will not propagate easily to a center part.

Here, with reference to the enlarged FIG. 4B, when focusing on the plurality of crimping portions arranged first along the row L1 to form the first group, as described above, the crimping portions are arranged in line along the L1 and in the row. The non-compression part 10a of the dimension (delta) exists between adjacent crimping | compression-bonding parts. Then, both sides of the three first pressing portions 21 arranged along the row L1 extend in the directions shown by (i) and (ii) along the three first pressing portions 21 arranged. A non-compression area | region exists, and each 1st crimping | compression-bonding part 21 exists independently of each other between non-compression area | regions.

Similarly, focusing on the plurality of crimping portions forming the second group, as described above, the crimping portions are arranged in a line along the arch R1 of the row L2, and at the same time between the adjacent crimping portions in the row. The non-compression part 10b of (delta) exists. Then, both sides of the five first crimping portion 21 arranged along the arch R1 extend in the directions shown by (iii) and (iv) along the five first crimping portions 21 arranged. There exists a non-compression | bonding area | region, and also in the 2nd group, each 1st crimping | compression-bonding part 21 exists independently of each other between non-compression | bonding area | regions.

That is, in this embodiment, the non-compression area | region which extends along the crimping | compression-bonding part is formed in both sides of the some crimping | compression-bonding part of a 1st group, and this crimping | compression-bonding part exists independently between each other. And these independent group of crimping | compression-bonding parts are intermittently arranged along the said row | line L1. The same applies to the plurality of crimping portions of the second group along the row L2.

The arrangement state of the crimping portion in the left fixing part 11 is symmetrical with the arrangement state of the crimping portion in the right fixing part 10. As shown in FIG. 1, the 1st crimping part 21 of the 2nd group in the right side fixing part 10, and the 1st crimping part 21 of the 2nd group in the left side fixing part 11 is shown. The space | interval We between is narrowest at the position of horizontal center line Ox-Ox, and this narrowest space | interval We is 20-35 mm. If it is less than the said range, each crimping | compression-bonding part of the right side fixing part 10 and the left side fixing part 11 will be easy to touch a labia, etc., and there exists a possibility of damaging a feeling of wearing. When the said range is exceeded, the space | interval of the crimp part of the 1st group arrange | positioned along the column L1 and the crimp part of the 2nd group arrange | positioned along the column L2 will become narrow, and the The area becomes so narrow that sufficient buffering effect cannot be obtained in the partition region 24.

As shown in FIG. 1, in the front fixing | fixed part 12, the said 1st crimping part 21 and the 2nd crimping part along the row | track following the convex curve shape of the front-end edge 1c of the absorbent sheet 1 is shown. (22) is regularly arranged. The rear fixing part 13 is symmetrical with the front fixing part 12, and similarly, the first pressing part 21 and the second pressing part 22 are formed in a regular arrangement. The preferred horizontal dimension Wc at the bottom surface of each crimp portion provided in the front fixing portion 12 and the rear fixing portion 13, and the desired spacing in the area and the arrangement direction, are the right fixing portion 10 and the left side. It is the same as the room fixing part 11.

When the absorbent sheet 1 is used, the release sheet 7 on the back side is peeled off, and the absorbent sheet 1 is worn by adhesively fixing the inside of the crotch portion of the underwear via the pressure sensitive adhesive layer 6.

Since both side edges 1a and 1b of the absorbent sheet 1 have a concave curved shape, when the absorbent sheet 1 is attached to the crochet portion of the undergarment, the concave curved shapes of the both side edges 1a and 1b are formed in the underwear. It almost coincides with the edge of the leg opening.

In the state where the absorbent sheet 1 is attached to the underwear and worn, the crotch portion of the underwear is deformed by the movement of the groin part or the tightening force by the thigh. However, since the entire absorbent sheet 1 is thin and the back sheet 3, the intermediate sheet 4, and the surface sheet 5 are formed of a soft material, the entire absorbent sheet 1 is formed of an underwear. It is easy to follow deformation of crotch part, and it is not easy to feel discomfort in crotch part. In particular, in the second surface sheet 5b, the groove groove forming region 16 is provided on the front surface, and in the first surface sheet 5a, the strip-shaped groove groove forming region 15 is formed in the center portion, so that the absorbent sheet The center area of (1) is soft, and this center area is easy to follow deformation of underwear. In addition, since the groove groove forming region 15 of the first surface sheet 5a is in contact with the female machine, the absorbent sheet 1 can smoothly contact the female machine.

However, if the entire absorbent sheet is soft, the straining force acts on both side edges 1a and 1b for the first time by the fastening pressure acting on both side edges 1a and 1b from the thigh and the strain force propagates to the central region of the absorbent sheet. As a result, large kinks and wrinkles may occur in the soft central region having the furrow groove forming region.

However, in the absorbent sheet 1 of this embodiment, the relatively small first crimping portion 21 and the third crimping portion 23 along the row L1 following both side edges 1a and 1b have a proper spacing. As shown in Fig. 4B, a plurality of first crimping portions 21 along L1 exist independently of each other in the non-compression region. Therefore, when the deformation force acts on both side edge portions 1a and 1b together with the edge of the crotch portion of the underwear due to the tightening force from the thigh portion or the like, the crimp portions 21 and 23 arranged along the row L1 and therebetween. By the stiffness difference and the thickness difference between the non-compression part 10a located in the plural compression parts 21 arranged along the column L1, and both sides thereof, as shown by (i) (ii) Due to the stiffness difference and the thickness difference with the non-compression region extending together, minute deformation occurs between the compression portions 21 and 23, the non-compression portion 10a, and the non-compression region, thereby absorbing the deformation pressure and It can be distributed. Therefore, the deformation force acting on both side edge portions 1a and 1b is difficult to propagate directly to the central region of the absorbent sheet 1, and it is possible to prevent the occurrence of large kinks or wrinkles in the central region by the force acting from the side. .

As described above, the plurality of crimping portions 21 arranged along the stiffness difference and thickness difference between the crimping portions 21 and 23 and the non-compression portion 10a, and the row L1 and both sides thereof (i) ( ii) the stiffness difference and the thickness difference with the non-compression region extending as shown, and in order to disperse the energy of the deformation force from the side, the thickness of the absorbent sheet on the bottom surface of the compression section, the non-compression portion 10a and the It is preferable that the difference in the thickness of the absorbent sheet in the non-compression region is 0.2 mm or more. Moreover, although the upper limit of this difference is not specifically defined, In order to be a thin absorbent sheet, it is preferable to make the thickness of the whole absorbent sheet about 3 mm, and the preferable range of the difference of the said thickness is 0.2-3 mm.

Moreover, in the right side fixing part 10 and the left side fixing part 11 of the said absorption sheet 1, it follows along row L2 inward from the crimp part of the 1st group arrange | positioned along the said row L1. The crimping part of the 2nd group arrange | positioned exists intermittently. Therefore, in the case where strain stress that cannot be dispersed in the crimping portion of the first group acts on the heat L2, the crimping portions 21 and 22 constituting the second group and the non-compression portion located between the crimping portions (10b), furthermore, a non-compression region extending as shown by (iii) (iv) on both sides of the crimp portion 21 along the column L2 functions to disperse the strain energy as described above, thus providing a central The propagation of the strain force to the area can be effectively prevented.

Furthermore, since the partition region 24 surrounded by the intermittent crimping portion is arranged along the both edges 1a and 1b, the deformation force such as a relatively large wrinkle or the like acting on the both edges 1a and 1b is increased. Is absorbed and alleviated.

That is, the partition areas 24 are independent of each other in a predetermined area, and the back sheet 3, the intermediate sheet 4 and the surface sheet 5 are not compressed by the thermal embossing in the partition area 24. Without overlapping. Therefore, when a relatively large deformation force is applied to both side edge portions 1a and 1b, the respective sheets are bent in this limited partition area 24 and exhibit elastic restoring force. It is possible to prevent the deformation force acting on both side edge portions 1a and 1b from propagating to the central region by the bending and elastic restoring forces in the limited region.

Further, the crimping parts of the first group arranged along the row L1 and the crimping parts of the second group arranged along the row L2 are relatively small and are arranged at intervals, and preferably each Since the horizontal dimension Wc of a crimping | compression-bonding part is smaller than the pitch of the arrangement | positioning of the furrow part 15a and the furrows 16a, an individual crimping part does not give rigidity to a wearer's body. Further, since the small crimping portions are arranged intermittently along the side edges 1a and 1b, and non-compression regions are located on both sides thereof, the crimping portions are independently of each other between the non-compression regions, In the vicinity of the edges 1a and 1b, the stiffness of the absorbent sheet 1 itself is not so high, and it does not prevent the absorbent sheet 1 from deforming to bend along the groin at both edges 1a and 1b. Therefore, it is difficult for the absorbent sheet 1 to give a rigid feeling in the groin part of a wearer.

This effect is apparent in contrast with the fact that a strip-shaped crimp portion extending linearly along the column L1, or a crimp portion of a predetermined width pattern extending linearly is formed. In the case of having the linear crimping part or the crimping part of the droplet pattern, both side edges 1a and 1b are hard to bend and impart rigidity to the wearer's body, but the absorbent sheet 1 of the embodiment As described above, has the effect of dispersing the energy of the clamping force acting on both side edges (1a, 1b), and does not impart a sense of rigidity to the wearer's body.

In addition, the absorbent sheet 1 is provided with a front fixing portion 12 and a rear fixing portion 13 inside the front edge 1c and the rear edge 1d, and each of the first pressing portions 21 is provided. And the second crimping portions 22 are arranged at intervals with a constant pitch. Therefore, even in the vicinity of the front edge 1c and the rear edge 1d, the absorbent sheet 1 does not impart a sense of rigidity to the wearer's body, and wrinkles of the underwear acting on the front edge 1c and the rear edge 1d. The generating force and the torsional force are absorbed and dispersed as described above.

Hereinafter, another arrangement pattern of a crimping | compression-bonding part is demonstrated with reference to one Embodiment. In the following embodiment, sheet lamination | stacking structure other than the pattern of a crimping | compression-bonding part, a groove groove structure, various other preferable conditions, etc. are the same as that of the absorption sheet 1 shown in the said FIG.

In the absorbent sheet 1A according to the second embodiment of the present invention shown in FIG. 5, the size and arrangement pattern of the crimped portions in the right side fixing portion 10 and the left side fixing portion 11 are the absorption portions shown in FIG. 1. Same as the sheet 1. However, in FIG. 5, the crimping portions of the front fixing part 12 and the rear fixing part 13 are not provided. Moreover, the groove groove forming area | region 15 of the 1st surface sheet 5a may be provided in FIG. 5, or may not be provided.

In the absorbent sheet 1A shown in FIG. 5, the crimping portions in the front fixing portion 12 and the rear fixing portion 13 are omitted, but are absorbed by the pressing portions forming the both side fixing portions 10 and 11. Since the fastening force acting on both side edge portions 1a and 1b of the sheet 1A can be absorbed and dispersed, it is possible to effectively prevent the occurrence of large wrinkles or kinks in the central region of the absorbent sheet.

In the absorption sheet 1B of 3rd Embodiment of this invention shown in FIG. 6, the right side fixing part 110 and the left side fixing part 111 are symmetrical shape with respect to the longitudinal center line Oy-Oy. . Here, only the left fixing part 111 will be described. In this fixing part 111, the elongate crimping part 25 is arranged by the broken wavy line which alternately repeats alternately, and the non-compression division area | region 26 enclosed by the said elongate crimping part 25 by this is carried out. Is formed. The plurality of partition regions 26 are arranged along the left edge 1b so as to follow the concave curve shape of the left edge 1b, and have the same area. In addition, the adjacent partition area 26 and the partition area 26 sandwich one crimp part 25 between them. Also in this embodiment, the preferable range of the area of the partition area 26 is the same as that of the partition area 24 shown in FIG.

Furthermore, at the position close to the left edge 1b, two dot-shaped crimping portions 27 are arranged near each intersection position of two wavy lines formed by the elongated crimping portion 25. Accordingly, the portion of the elongated crimp portion 25 on the line L3 provided to connect the dot-shaped crimp portion 27 and the crimp portion 27 is crimped in the column L1 of FIG. 4. Like the part, the 1st group press part is comprised. And the 2nd group crimp part is formed inside the crimp part of the 1st group arrange | positioned along L3, and the said division area | region 26 is arrange | positioned between the crimp part of 1st group and the crimp part of 2nd group.

Therefore, also in this absorbent sheet 1B, the strain stress acting on both side edge parts 1a and 1b can be absorbed and disperse | distributed, and it can prevent that a big wrinkle and a twist generate | occur | produce in a center area | region.

In addition, in the absorption sheet 1B shown in FIG. 6, the front fixing part 112 is formed inside the front edge 1c, and the rear fixing part 113 is formed inside the rear edge 1d. The fixing portions 112 and 113 are formed by arranging the first crimping portion 21 and the second crimping portion 22 at intervals along a curve following the front edge 1c and the rear edge 1d. The absorption and dispersion functions of the deformation force are the same as those of the absorbent sheet 1.

In the absorbent sheet 1C shown in FIG. 7, the right fixing part 210 and the left fixing part 211 are provided, and the crimping parts 28 are arranged in two wavy lines in each of them. This results in a non-compression partition area 29 surrounded by the crimp 28. In the right side fixing part 210 and the left side fixing part 211, the division area | region 29 of the same area is arrange | positioned along the both edges 1a and 1b.

Moreover, in the front fixing part 112 and the rear fixing part 213, the crimping | compression-bonding parts 31 and 31 which extend continuously inside and along the front edge 1c and the rear edge 1d are formed.

Also in this absorbent sheet 1C, the deformation force acting on both edges 1a and 1b in the same manner as described above can be absorbed and dispersed by the intermittent crimping portion 28 and the partition region 29, and the both edges 1a, 1b) The near side can be made relatively soft.

In the absorbent sheet 1D shown in FIG. 8, the right fixing part 310 is formed inside the right edge 1a, and the left fixing part 311 is formed inside the left edge 1b. . In both side fixing parts 310 and 311, the small diameter crimping portions 35 are arranged at equal pitches at intervals along the row L4 following the concave curves of the side edge portions 1a and 1b. The group crimping part is formed. Non-compression regions extending along the row L4 are formed on both sides of the first group of compression portions arranged in a row, and each of the compression portions 35 exists independently between the non-compression regions.

Further, inside the crimping portions of the first group, small-size crimping portions 36 are arranged at equal pitches at intervals along rows L5 following the concave curved shapes of the respective side edge portions 1a and 1b. As a result, a crimp portion of the second group is formed. Similarly, a non-compression area | region is extended also on both sides of this crimping | compression-bonding part 36, and each crimp part 36 exists independently between each other.

Further, non-compression regions 37 and 37 for separating the crimps of the first and second groups between the crimps of the first group and the crimps of the second group are formed along both edges 1a and 1b. It exists in the shape of an arc strip.

Also in this absorbent sheet 1D, the strain stress acting on both side edge portions 1a and 1b is absorbed and dispersed by the individual pressing portions 35 constituting the first pressing portion in the first group along the heat L4, Furthermore, it absorbs and disperse | distributes further by the individual crimping | compression-bonding parts 36 which comprise the 2nd group of crimping | compression-bonding parts along inner row L5 of row | line L4. In particular, in this embodiment, the crimping | compression-bonding part 35 of the 1st group and the crimping | compression-bonding part 36 of a 2nd group are shift | deviated by half pitch from each other in a vertical direction. Therefore, the one crimping part 36 is located between the adjacent crimping | compression-bonding part 35 and the crimping | compression-bonding part 35. FIG. Therefore, the deformation force to propagate beyond the crimping portion of the first group to the central region can be further effectively distributed by the second crimping portion.

In addition, the structure of the front fixing | fixed part 12 and the rear fixing | fixed part 13 is the same as the absorbent sheet 1 of embodiment shown in FIG.

In the absorbent sheet 1E shown in FIG. 9, the right fixing part 410 is formed inside the right edge 1a, and the left fixing part 411 is provided inside the left edge 1b. The right side fixing part 410 and the left side fixing part 411 are provided in the right side fixing part 10 and the left fixing part 11 of FIG. 1, without forming a 2nd group crimping | compression-bonding part, 21 and the crimping | compression-bonding part 23 are arrange | positioned in line along row L1, and form only the 1st group of crimping | compression-bonding parts, and the crimping | compression-bonding part 22 is regularly arrange | positioned inside row L1. Therefore, the partition area is not installed. In addition, the front fixing part and the rear fixing part are not provided.

As the absorbent sheet 1E also has the second group of crimps as shown in the above-described embodiments by the first group of crimps formed along the column L1, the effect is not remarkable, but both edges ( It is supposed that the strain stress acting on 1a and 1b can be absorbed and dispersed.

In addition, each layer of an absorbent sheet can be made into the following various structures.

For example, the surface sheet 5 may have a single layer structure and may have a liquid absorbing ability. However, in order to make the bottom face of a crimping | compression-bonding part smooth by heat embossing, and to make a film surface shape, it is necessary that the said surface sheet 5 contains a thermoplastic fiber. For example, a hydrophilic fiber is 55 mass% of a rayon fiber having a fineness of 1.38 dtex and a fiber length of 44 mm, a 30 mass% polyester fiber having a fineness of 1.43 dtex and a fiber length of 30 mm, a fineness of 1.65 dtex and a fiber length of 45 It is possible to use 15 mass% of polypropylene fiber of mm, and the spunlace nonwoven fabric of unit weight about 38 g / m <2> as the said surface sheet 5. In addition, as long as it does not focus on making the bottom part of a crimping | compression-bonding part into a film surface shape as mentioned above, you may form the surface sheet 5 mainly by cellulose fiber, such as cotton, rayon, and pulp, or only cellulose fiber.

In this case, the intermediate sheet 4 may be an air through nonwoven fabric having a unit weight of about 25 g / m 2 made of a core-sheath composite synthetic fiber in which the core portion is polyester and the sheath portion is polyethylene. This intermediate sheet 4 functions as a cushion layer rather than for absorbing the liquid, thereby weakening the contact pressure of the wearer's skin.

The back sheet 3, the intermediate sheet 4 and the surface sheet 5 may also be formed of a water-decomposable material or a biodegradable material. Thus, the absorbent sheet after use can be disposed of in the flush toilet.

In this case, the back sheet 3 may be a spunlace nonwoven fabric or paper composed of fibers having a fiber length of 1 to 10 mm such as rayon fibers, cotton fibers, biodegradable resin fibers, and water-soluble binders such as PVA resin. Alternatively, a coating of PVA, a hydrolyzable ester-based urethane, or the like on the nonwoven fabric or paper, or a film of biodegradable resin such as polylactic acid, polybutylsuccinate, polyhydroxybutylate, or the like can be used.

In addition, as the intermediate sheet 4, a spunlace comprising a fiber having a length of 1 mm to 10 mm, such as rayon fiber, cotton fiber, biodegradable resin fiber, and, if necessary, polyvinyl alcohol (PVA) resin or the like added as a binder. A chemically bonded airlaid nonwoven fabric can be used using a non-woven fabric, paper, or a small amount of an acceptable material such as acrylic acid ester or PVA as a binder.

Moreover, the surface sheet 5 can also be comprised with the above-mentioned water-decomposable spunlace nonwoven fabric. Alternatively, a plurality of liquid permeation holes may be formed in the water-soluble resin film and used as the surface sheet 5.

In addition, the absorbent sheet has a length of 60 to 140 mm in the longitudinal center line (Oy-Oy) and a width dimension of about 45 to 65 mm in the horizontal center line (Ox-Ox).

While the invention has been shown and described with respect to its embodiments, it will be apparent to those skilled in the art that the foregoing and other various modifications, omissions, and additions can be made without departing from the spirit and scope of the invention. Accordingly, the present invention is not to be understood as limited to the specific examples described herein, but includes all possible embodiments that may be embodied within the equivalent scope included in respect of the features in the appended claims.

Industrial availability

As described above, the absorbent article of the present invention can prevent large wrinkles or kinks from occurring in the central region without impairing the overall softness, and can secure a wide area of the surface to be subjected to the liquid at all times. The adhesiveness to an excretory engine becomes favorable. In addition, since the whole is soft, it is less likely that both edges provide rigidity to the wearer's body. Therefore, this absorbent article can be used suitably especially as thin absorbent articles, such as a sheet | seat for secretion absorption.

Claims (12)

In an absorbent article formed of a plurality of sheets overlapped with each other, and formed lengthwise to have side edge portions 1a, 1b extending in the longitudinal direction and short edge portions 1c, 1d facing in the longitudinal direction, In the range of the predetermined length La extending longitudinally across the horizontal center line Ox-Ox of the article, a plurality of crimping portions of the first group are provided inside the respective side edge portions 1a and 1b. The crimping portion of the first group is arranged in a line along the shape of each of the side edges (1a, 1b) at appropriate intervals, and the non-compression region is left on both sides of the row. The absorbent article as set forth in claim 1, wherein an interval between adjacent crimping portions in the row is 0.5 to 5 mm, and an area of the bottom surface of the crimping portion is 0.2 to 6 mm2. The absorbent article as set forth in claim 1, wherein at least some of the crimp portions of the first group have a bottom surface of a circle, an ellipse, or a polygon, and are arranged at a constant pitch along the row. The absorbent article as set forth in claim 1, wherein each of the side edge portions (1a, 1b) has a concave curve shape, and the heat conduction concave curve shape formed by the first group of compression parts. The absorbent article according to claim 1, wherein a plurality of crimping portions of the second group are provided inside the crimping portions of the first group, and a non-compression region is left between the crimping portions of the first group and the crimping portions of the second group. . The absorbent article as set forth in claim 5, wherein the area of the bottom face of said crimp portion of said second group is 0.25 to 6 mm 2. In an absorbent article formed of a plurality of sheets overlapped with each other, and formed vertically long to have side edge portions 1a and 1b extending in the longitudinal direction and short edge portions 1c and 1d opposite to the longitudinal direction, Inside each of the side edge portions 1a and 1b, a non-compression partition area having a predetermined area, each surrounded by a plurality of crimping portions, is provided, and the predetermined length extending in the longitudinal direction across the horizontal center line Ox-Ox of the article. In the range of the length La, a plurality of said partition areas are arrange | positioned along each said side edge part (1a, 1b). 8. The absorbent article as claimed in claim 7, wherein a plurality of said partition regions arranged along said side edges (1a, 1b) have the same shape and the same area. The absorbent article as set forth in claim 7, wherein at least some of the plurality of crimps surrounding the partition region have a bottom surface of a circle, an ellipse, or a polygon. The absorbent article as set forth in claim 7, wherein an area of the bottom surface of the crimp portion is 0.25 to 6 mm 2. The minimum in the transverse direction of the crimping | compression-bonding area | region inserted in the crimping part located in the inside of one side edge part 1a, and the crimping part located in the inside of the other side edge part 1b. An absorbent article having a dimension (We) of 20 mm or more. The non-pressing region of claim 1 or 7, which is fitted to a crimping portion located inside the one side edge portion 1a and a crimping portion located inside the other side edge portion 1b, the maximum of the article. An absorbent article in which a sheet exposed to an outer surface is molded, and the grooves 15a and the grooves 15b are alternately formed in the transverse direction while extending in the longitudinal direction.