JP4515193B2 - Absorbent articles - Google Patents

Description

  The present invention relates to an absorbent article that receives excrement from a wearer.

  Conventionally, as an absorbent article used for disposable diapers or the like, a main body provided with an absorbent core formed of pulverized pulp or the like between a top sheet and a back sheet, and urine attached to both sides of the main body What is provided with the three-dimensional gather which prevents leaks, etc. is used. In such disposable diapers, since it is usually necessary to replace the entire diaper even when urinating a small amount, an economic burden is increased for the user.

Therefore, an inexpensive auxiliary absorbent device (so-called urine pad or the like) is placed on the main body of the disposable diaper and worn, and only the auxiliary absorbent device is replaced when urinating a small amount. With respect to such disposable diapers, a technique has been proposed in which an auxiliary absorbent is easily placed on a main body sandwiched between three-dimensional gathers, and a used auxiliary absorbent is easily replaced. For example, in Patent Document 1, a pair of rising flaps (three-dimensional gathers) are provided on both sides of the main body of the disposable diaper cover so as to be separated from both sides of the main body, and the distance between the edges of the rising flaps is larger than the width of the auxiliary absorbent. A technique for facilitating placement and replacement of the auxiliary absorbent on the main body by increasing the size is disclosed.
JP 2002-272787 A

  By the way, in such a disposable diaper cover, there is a gap between the auxiliary absorbent device placed on the main body and the rising flap, so that the auxiliary absorbent device is displaced when worn or the end of the auxiliary absorbent device is rounded. There was a case.

  This invention is made | formed in view of the said subject, and aims at hold | maintaining the auxiliary | assistant absorbent tool attached to the main-body part reliably.

Invention of Claim 1 is an absorbent article which receives excrement from a wearer, Comprising: The front part and back part which contact | abut the skin of a wearer's abdomen and the back side, and the said front part and the said back And a pair of side wall portions provided on both sides of the main body portion over substantially the entire length in the longitudinal direction in which the front portion, the absorption portion and the rear portion are arranged. Each of the pair of side wall portions is spaced apart laterally from the three-dimensional gather portion that rises toward the wearer side on the side of the absorption portion, and the side edges of the front portion and the rear portion. in the folded position, said a folded portion portion continuous from the standing gathers part to be folded back to the center line side of the main body portion on the upper surface side in contact with the wearer, the folded portion, the in the front longitudinal portion In the end portion and the end portion of the rear portion, the top sheet of the main body portion and the side wall portion of the side wall portion are joined to the site from the side edge to the folded position, and when the auxiliary absorbent is used together, the absorbing portion is wider auxiliary absorbent pad than the absorbent core of, Ru attached to said body portion by both sides is placed on the absorbent part be sandwiched between the standing gathers part.

  Invention of Claim 2 is an absorbent article of Claim 1, Comprising: The said main-body part is a top sheet which covers the main surface by the side of the said wearer of the said absorption core, The said absorption A back sheet that covers the other main surface of the core, and each of the pair of side wall portions is a member joined to the back sheet at a side of the absorbing portion, and the three-dimensional gather portion contracts to A part of the back sheet rises together with the three-dimensional gather portion toward the wearer.

Invention of Claim 3 is an absorbent article of Claim 1 or 2, Comprising: From the folding | returning position of the said folding | returning part in the edge part of the said front part and the edge part of the said rear part in the said longitudinal direction The distance to the edge of the side wall is 20 mm or more and 35 mm or less.

Invention of Claim 4 is an absorbent article in any one of Claim 1 thru | or 3, Comprising: In the edge part of the said front part in the said longitudinal direction, and the edge part of the said back part, The distance from the folding position to the side edge of the main body is 5 mm or more and 15 mm or less.

  In this invention, the auxiliary | assistant absorber attached to the main-body part can be hold | maintained reliably. In the invention of claim 2, the side wall portion can be easily raised largely on the side of the absorption portion.

  FIG. 1 is a plan view showing an absorbent article 1 according to an embodiment of the present invention. The absorbent article 1 includes a substantially sheet-shaped main body 2 and the (+ X) side of the main body 2 and the (−X) side over almost the entire length in the longitudinal direction of the main body 2 (that is, the Y direction in FIG. 1). And a pair of side wall portions 3 provided on the side, and used for disposable diapers that receive excrement from the wearer. In FIG. 1, the main surface on the (+ Z) side of the main body 2 is a surface in contact with the wearer (hereinafter referred to as “upper surface”).

  As shown in FIG. 1, the main body 2 includes a front part 21 and a rear part 23 that are in contact with the wearer's abdomen and back skin, and an absorption part 22 between the front part 21 and the rear part 23. The front part 21, the absorption part 22, and the rear part 23 are arranged along the Y direction.

  The side wall 3 is a band-like member that is long in the Y direction, and is joined to both sides of the main body 2. In the side wall portion 3, a plurality of elastic members 33 extending in the Y direction are joined to the side portions (that is, the (+ X) side and the (−X) side) of the absorbing portion 22. As shown in FIG. 1, the elastic member 33 is in an expanded state when the absorbent article 1 is expanded. FIG. 2 is a perspective view showing the absorbent article 1. As shown in FIG. 2, in the absorbent article 1, when the elastic member 33 contracts, the side wall portion 3 rises toward the wearer side (that is, on the upper surface side) on the side of the absorbent portion 22, and is worn. A three-dimensional gather (a so-called leg gather) that contacts the vicinity of the base of the wearer's foot is formed. Hereinafter, the part which forms the three-dimensional gather of the side wall part 3 is called "three-dimensional gather part 32".

  Moreover, in the side wall part 3, in the side of the front part 21 and the rear part 23, the site | part which continues from the solid gather part 32 is the centerline (refer code | symbol 2J in FIG. 1) side along the Y direction of the main-body part 2. Folded toward the front end and the rear end in the longitudinal direction of the main body 2 (that is, the end on the (+ Y) side of the front portion 21 and the end on the (−Y) side of the rear portion 23). Is fixed to the upper surface side by bonding. Hereinafter, the part where the side wall part 3 is folded is referred to as a “folded part 31”.

  3 to 5 are partial cross-sections in which a part on the (+ X) side of the absorbent article 1 is cut along a plane perpendicular to the Y direction at positions AA, BB, and CC shown in FIG. FIG. FIG. 3 shows the absorption part 22 of the main body part 2 and the three-dimensional gather part 32 of the side wall part 3. 4 and 5 show the rear part 23 of the main body part 2 and the folded part 31 of the side wall part 3, FIG. 4 is a partial sectional view between the rear end part and the three-dimensional gather part 32, and FIG. 5 shows the rear end part. FIG. The structure of the front part 21 (see FIG. 1) of the main body part 2 and the folded part 31 of the side wall part 3 provided on the side of the front part 21 is substantially the same as that shown in FIGS. The structure on the (−X) side of the property article 1 is symmetric with the structure on the (+ X) side shown in FIGS. 3 to 5.

  As shown in FIG. 3, the main body 2 includes a liquid-absorbing absorbent core 2b, a top sheet 2a that covers the main surface of the absorbent core 2b on the wearer side (that is, the (+ Z) side), and the absorbent core 2b. A back sheet 2c covering the other main surface is provided. The top sheet 2a and the back sheet 2c are joined around the absorbent core 2b by an adhesive such as hot melt. In the main body 2, as shown by a thick broken line in FIG. 1, the width in the X direction of the absorbent core 2 b in the absorbent portion 22 is made smaller and thicker than the width in the front portion 21 and the rear portion 23.

  The top sheet 2a shown in FIG. 3 is a non-woven fabric formed of a liquid-permeable material, for example, hydrophilic fiber, and captures moisture from excrement from the wearer and moves it to the absorbent core 2b. Nonwoven fabrics used as the top sheet 2a are, for example, point bond nonwoven fabrics, air-through nonwoven fabrics, and spunlace nonwoven fabrics, and cellulose, rayon, cotton, and the like are usually used as hydrophilic fibers forming these nonwoven fabrics. As the top sheet 2a, a liquid-permeable non-woven fabric formed of hydrophobic fibers (for example, polypropylene, polyethylene, polyester, polyamide, nylon) whose surface is hydrophilically treated with an activator may be used. A plastic film having holes may be used.

  The absorbent core 2b is obtained by wrapping a mixture of a hydrophilic fiber (for example, pulverized pulp fiber or cellulose fiber) with a granular water-absorbing polymer (for example, SAP (Super Absorbent Polymer)) with tissue paper or a liquid-permeable sheet. The moisture formed and absorbed through the top sheet 2a is quickly fixed. Tissue paper or the like that wraps hydrophilic fibers prevents the hydrophilic fibers from being deformed and the water-absorbing polymer from falling off.

  The back sheet 2c is a water-repellent or liquid-impervious nonwoven fabric, and the moisture that has permeated through the top sheet 2a and the moisture once absorbed by the absorbent core 2b are outside the main body 2 (that is, on the (−Z) side). ) Prevent exudation. Nonwoven fabrics used as the backsheet 2c are, for example, spunbond nonwoven fabrics, meltblown nonwoven fabrics, and SMS (spunbond / meltblown / spunbond) nonwoven fabrics, and may be subjected to water repellent treatment as necessary. A water-repellent or liquid-impervious plastic film, a composite material of the nonwoven fabric and the plastic film, or the like may be used as the back sheet 2c. In this case, from the viewpoint of the wearer's comfort, it is preferable to use a plastic film having air permeability.

  The side wall 3 is formed of a water-repellent or liquid-impervious non-woven fabric (for example, spunbond non-woven fabric, melt blown non-woven fabric, SMS non-woven fabric), a plastic film, or a composite material thereof, similarly to the backsheet 2c.

  As shown in FIGS. 3 to 5, the side wall 3 is joined to the outer surface of the back sheet 2 c, which is the surface opposite to the upper surface of the main body 2 (hereinafter referred to as “rear surface”). As shown in FIG. 3, as shown in FIG. 3, the top sheet 2 a and a part of the back sheet 2 c are moved toward the wearer side together with the three-dimensional gather portion 32 due to the contraction of the three-dimensional gather portion 32 due to the contraction of the elastic member 33. Stand up. When the absorbent article 1 is used, an auxiliary absorbent device (so-called urine pad or the like) that is wider than the absorbent core 2b and excellent in liquid absorbency may be used in combination. In this case, as shown by a two-dot chain line in FIG. 3, the auxiliary absorbent 9 is placed on the absorbent portion 22, and sandwiched between the three-dimensional gather portions 32 of the side wall portion 3 from both sides, whereby the absorbent article 1. Attached to the main body 2.

  Further, in the front part 21 and the rear part 23 of the main body part 2, as shown in FIG. 4, the side wall part 3 is folded twice in a substantially Z shape together with a part of the top sheet 2a and the back sheet 2c. Is joined to the rear side of the main body 2 and is folded back to the center line side of the main body 2 on the upper surface side at a position spaced laterally from the side edge 24 of the main body 2 and wound up so as to wrap the main body 2 from the rear side. A folded portion 31 is formed.

  Further, as shown in FIG. 5, at the rear end portion of the main body 2, the folded portion of the side wall 3 includes the upper surface of the main body 2 (that is, the top sheet 2 a) and the side edges of the main body 2. It fixes by joining with the site | part between 24 and the folding position 311, and the standing to the wearer side of the side wall part 3 is inhibited (same also in the front-end part of the main-body part 2). In the state shown in FIG. 5, the distance from the folding position 311 of the folding section 31 to the side edge 24 of the main body section 2 is set to 5 mm or more and 15 mm or less (preferably about 7 mm). The distance to the edge 312 of the side wall part 3 facing inward is set to 20 mm or more and 35 mm or less (preferably about 25 mm).

  FIG. 6 is a diagram showing a flow of manufacturing steps of the absorbent article 1. 7 to 9 are BB cross sections (see FIG. 1) of the absorbent article 1 being manufactured, that is, partial cross-sectional views in the rear portion 23, and the shapes of corresponding portions of the front portion 21 are also substantially the same. is there. When the absorbent article 1 is manufactured, first, an absorbent core 2b is formed by wrapping a pulverized pulp fiber or the like mixed with a water-absorbing polymer with tissue paper or the like (step S11). Subsequently, the absorbent core 2b is sandwiched between the (+ Z) side and the (−Z) side by the top sheet 2a and the back sheet 2c, and the top sheet 2a and the back sheet 2c are bonded by hot melt or the like around the absorbent core 2b. As a result, the main body 2 is formed (step S12).

  When the main body 2 is formed, as shown in FIG. 7, a substantially rectangular belt-shaped member is joined to the back sheet 2c side of the main body 2 by an adhesive or the like as the side wall 3 (step S13). Then, as shown in FIG. 8, the side wall portion 3 is once on the side of the front portion 21 and the rear portion 23 of the main body portion 2 along with a part of the top sheet 2 a and the back sheet 2 c on the back side of the main body portion 2. In other words, it is bent toward the center line side of the main body 2 (step S14). A part of the bent side wall portion 3 is joined to the back sheet 2c and a portion of the side wall portion 3 joined on the back sheet 2c. Further, in the front part 21 and the rear part 23 of the main body part 2, as shown in FIG. 9, the side wall part 3 is bent outward (that is, the (+ X) side in FIG. 9) and the side edges 24 of the main body part 2. The top sheets 2a that are further spread to the (+ X) side and are opposed to each other on the main body 2 are joined by an adhesive or the like (step S15).

  FIG. 10 is a plan view showing the absorbent article 1 after completion of step S15. In the absorbent article 1, as described above, a part of the side wall part 3 is folded back to the back side of the main body part 2 at the front part 21 and the rear part 23 of the main body part 2. The width W1 of the side wall portion 3 from the side edge 24 to the edge 312 of the side wall portion 3 at the side and rear end portions is the side edge 24 at the side of the absorption portion 22 of the main body portion 2 (the side edge 24 is not clear) The case corresponds to an imaginary straight line connecting the side edges 24 of the front part 21 and the rear part 23 and is indicated by a two-dot chain line in FIG. 10) to the edge 312 of the side wall part 3. It becomes smaller than the width W2 of the side wall part 3 of.

  When the side wall portion 3 is bent outward, as shown in FIG. 4, a folding position 311 that is laterally separated from the side edge 24 of the main body portion 2 on the side of the front portion 21 and the rear portion 23 of the main body portion 2. The side wall portion 3 is folded back to the center line side on the upper surface side to form a folded portion 31 (step S16). Further, as shown in FIG. 5, at the front end portion and the rear end portion of the main body portion 2, the side wall portion The folded portion 3 is fixed by joining the top sheet 2a and the portion between the side edge 24 of the side wall 3 and the folded position 311 (step S17). Then, as shown in FIG. 2, the elastic member 33 that is joined in advance to the three-dimensional gather portion 32 of the side wall portion 3 contracts, whereby the side wall portion 3 rises toward the wearer side, and the three-dimensional gather is formed. It is formed.

  As described above, in the absorbent article 1, the three-dimensional gather portion 32 rises on the side of the absorbent portion 22 of the main body portion 2, and the side wall portion 3 that is continuous with the three-dimensional gather portion 32 in the front portion 21 and the rear portion 23. The part is folded back to the center line side of the main body 2 on the upper surface side at a folding position 311 spaced laterally from the side edge 24 of the main body 2, and fixed at the front end and the rear end of the main body 2. Thus, the folded portion 31 is formed. For this reason, in the absorbent article 1, the space for accommodating the auxiliary absorbent 9 is increased in the vicinity of the absorbent portion 22, and the attachment and detachment of the auxiliary absorbent 9 to the main body 2 are facilitated. The auxiliary absorbent 9 attached to 2 is pressed from both sides by a pair of three-dimensional gather portions 32 that abut from both sides, and the movement in the lateral direction (that is, the X direction in FIG. 3) is restricted. Furthermore, also in the front part 21 and the rear part 23, as shown in FIG. 4, the corner of the auxiliary absorbent 9 is formed in a space formed by separating the folding position 311 from the side edge 24 of the main body part 2 to the side. It is easily and stably held. As a result, in the absorbent article 1, it is possible to reliably hold the auxiliary absorbent 9 by preventing the auxiliary absorbent 9 from being rolled up or displaced when the absorbent article 1 is worn.

  Further, the side wall 3 rises together with a part of the top sheet 2 a and the back sheet 2 c in the three-dimensional gather portion 32, so that the side wall 3 can be easily raised largely on the side of the absorbing portion 22. As a result, the auxiliary absorbent 9 can be held more reliably.

  In the absorbent article 1, the width W <b> 1 of the side wall 3 from the side edge 24 to the edge 312 of the side wall 3 at the front end and the rear end of the main body 2 is the side of the main body 2 on the side of the absorbent 22. Since the width W2 of the side wall part 3 from the side edge 24 to the edge 312 of the side wall part 3 is made smaller, the height of the side wall part 3 in the front part 21 and the rear part 23 is three-dimensional when the absorbent article 1 is worn. The height of the gather portion 32 can be made lower. As a result, even when the wearer is in the lateral position, the adhesion between the main body 2 and the skin can be improved in the front portion 21 and the rear portion 23. In addition, the side wall portion 3 is folded back to the center line side on the upper surface side of the main body portion 2, and the folded portion 31 formed by being fixed at the front end portion and the rear end portion of the main body portion 2 is for the excrement transmitted through the side wall portion 3. Play a role of flow prevention. As a result, the diffusion of a small amount of liquid (for example, excrement such as urine) transmitted through the skin and the side wall portion 3 in the front-rear direction is also suppressed, and the front and rear portions of the absorbent article 1 (that is, the wearer's ventral side and back). Leakage of excrement from the side) can be prevented.

  Moreover, in the absorbent article 1, before the side wall part 3 is folded back to the center line side on the upper surface side of the main body part 2 on the side of the front part 21 and the rear part 23 of the main body part 2, the center line is once centered on the back side. It is bent to the side and then to the outside. For this reason, the shape stability of the three-dimensional gather portion 32 can be improved, and even when the height of the three-dimensional gather portion 32 is increased, the three-dimensional gather portion 32 falls or twists toward the outside of the main body portion 2. In addition, it is possible to prevent the absorption of the moisture of excrement by falling inward and covering a part of the absorption part 22. As a result, leakage of excrement from the side portion of the absorbent article 1 (that is, near the base of the wearer's foot) can be more reliably prevented. In the absorbent article 1, since the side wall part 3 is bent together with a part of the top sheet 2a and the back sheet 2c, the shape stability of the three-dimensional gather can be further improved.

  As mentioned above, although embodiment of this invention has been described, this invention is not limited to the said embodiment, A various change is possible.

  For example, the distance from the folding position 311 of the folding part 31 to the edge 312 of the side wall part 3 may be variously changed according to the width and thickness of the auxiliary absorbent 9 attached to the main body part 2. In addition, the width of the portion from the folding position 311 to the edge 312 of the side wall portion 3 may be smaller than the width of the portion from the side edge 24 to the folding position 311. In this case, only the opposite side wall portions 3 are joined. Will be.

  When the side wall part 3 and the back sheet 2c are made of the same material, it is not necessary to join the side wall part 3 to the back sheet 2c, and a member in which the side wall part 3 and the back sheet 2c are integrally formed is used. Good.

  In the absorbent article 1, the top sheet 2a, the back sheet 2c, and the side wall portion are made of nonwoven fabrics manufactured by various methods such as the spunlace method, needle punch method, thermal bond method, spunbond method, chemical bond method, and air-through method. 3 can be used.

  The absorbent article 1 shown in FIG. 1 and FIG. 2 is used as a disposable diaper attached to a cover member, but the structure of the absorbent article 1 is a disposable diaper worn alone, for example, a band at the position of the waist. It can also be used for things that are fixed by using or pants.

It is a top view showing an absorptive article concerning one embodiment. It is a perspective view which shows an absorbent article. It is a fragmentary sectional view of an absorptive article. It is a fragmentary sectional view of an absorptive article. It is a fragmentary sectional view of an absorptive article. It is a figure which shows the flow of the manufacturing process of an absorbent article. It is a fragmentary sectional view of an absorptive article. It is a fragmentary sectional view of an absorptive article. It is a fragmentary sectional view of an absorptive article. It is a top view which shows an absorbent article.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Absorbent article 2 Main body part 2a Top sheet 2b Absorption core 2c Back sheet 2J Center line 3 Side wall part 21 Front part 22 Absorption part 23 Back part 24 Side edge 31 Folding part 32 Solid gather part 311 Folding position 312 Edge S11-S17 Step

Claims (4)

An absorbent article that receives excrement from a wearer,
A front part and a rear part in contact with the wearer's abdomen and dorsal skin, and a substantially sheet-like main body part having an absorption part between the front part and the rear part;
A pair of side wall portions provided on both sides of the main body portion over substantially the entire length in the longitudinal direction in which the front portion, the absorption portion and the rear portion are arranged;
With
Each of the pair of side wall portions is
A three-dimensional gather portion that rises toward the wearer side at the side of the absorption portion;
A folded portion that is folded to the center line side of the main body portion on the upper surface side in contact with the wearer at a folded position spaced laterally from the side edges of the front and rear portions. When,
With
In the end portion of the front portion and the end portion of the rear portion in the longitudinal direction, the folded portion is a top sheet of the main body portion, and a portion of the side wall portion from the side edge to the folded position. Joined and
When an auxiliary absorbent is used in combination, an auxiliary absorbent wider than the absorbent core of the absorbent part is placed on the absorbent part and sandwiched between the three-dimensional gather part from both sides. attached absorbent article, wherein the Turkey. The absorbent article according to claim 1,
The main body is
An absorbent core;
A top sheet covering the main surface of the absorbent core on the wearer side;
A backsheet covering the other main surface of the absorbent core;
With
Each of the pair of side wall portions is a member joined to the back sheet at a side of the absorbing portion, and a part of the back sheet is combined with the three-dimensional gather portion due to contraction of the three-dimensional gather portion. Absorbent article characterized by standing up toward. The absorbent article according to claim 1 or 2,
An absorptive article characterized in that the distance from the folded position of the folded portion to the edge of the side wall portion is 20 mm or more and 35 mm or less at the end portion of the front portion and the end portion of the rear portion in the longitudinal direction . The absorbent article according to any one of claims 1 to 3,
In the end portion of the front portion and the end portion of the rear portion in the longitudinal direction, a distance from the folding position of the folding portion to the side edge of the main body portion is 5 mm or more and 15 mm or less. Absorbent article.

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