JP4249097B2 - Pants-type disposable diaper - Google Patents

Description

  The present invention relates to a pants-type disposable diaper. More specifically, the present invention relates to a pants-type disposable diaper that fits well to any body shape wearer.

  Disposable diapers are basically formed from a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body disposed between these two sheets, and excreted urine excreted when worn. An object is held on the absorber through a liquid-permeable top sheet, and the liquid-impermeable back sheet prevents the excrement from leaking out of the diaper. And various forms, such as a deployment type and a pants type, have been proposed so that they can be suitably used according to the application, and are widely used by infants and other adult incontinent persons.

  Pants-type disposable diapers are generally folded by overlapping the front and back bodies through the crotch, joining the opposite longitudinal edges of the front and back bodies and opening around the waist and a pair of legs In order to form the opening, and to fit the diaper to the wearer's body, the elastic elastic body is disposed along the waist opening and the leg opening.

  Such a pants-type disposable diaper is not suitable for all wearers because the size of the opening around the waist and the opening around the leg is constant, and it does not fit all wearers. There is a problem that one of the surrounding openings is too large or too small, and if the opening is too small, the elastic elastic body placed in the opening will be tightened, leaving a mark on the skin of the wearer. There was a problem of sticking or rashing, and when the opening was too large, there was a problem of excretion leaking from the opening. In particular, these problems are significant in the opening around the leg that is susceptible to the movement of the wearer.

In order to improve such problems, elastic fastening tape is attached along the waist opening and leg opening at the side edge around the waist of the pants-type disposable diaper. (Patent document 1) which tightened the body to fit the wearer, and the trunk side edge of the pant-type disposable diaper from the leg-hole opening to the waist-around opening, or the leg-hole opening A slit reaching from the waist to the opening around the waist is formed, and the slit part is connected by a detachable connecting member to fit the diaper to the wearer (Patent Document 2, Patent Document 3). Disposable diaper around the torso side edge, slits are formed in the leg opening to prevent the diaper from being tightened more than necessary by the wearer ( Patent Document 4) have been disclosed.
Japanese Utility Model Publication No. 5-39531 Japanese Utility Model Publication No. 6-65409 Japanese Utility Model Publication No. 6-66653 JP-A-8-38546

  However, in the case of a diaper in which a stretchable fastening tape is attached to the waistline side edge, an overlapped portion is formed when the diaper is tightened, so that the feeling of wearing is deteriorated. In addition, in the case of a diaper that is formed with a slit in the waistline side edge and connected with a connecting member, when a large amount of excrement is excreted, it leaks out of the slit, and when the connecting member comes off during wearing May lose its function as a diaper. Furthermore, in the case of a diaper in which a slit is formed in the opening around the leg at the side edge, since the tightening of the opening around the leg is weak, excrement may leak from the slit depending on the body shape of the wearer.

  The present invention overcomes the problems of the conventional pants-type disposable diaper, fits well to any body wearer, and does not damage or rash the wearer's skin, The present invention provides a pants-type disposable diaper having an improved effect of preventing leakage from an opening around a leg.

  The present invention for solving the problems of the conventional pants-type disposable diapers includes the following inventions.

(1) It has a front body, a back body, and a crotch part located between these two body parts. The front body and the back body are folded and overlapped at the crotch part, and the front body and the back body are relative to each other. In a pants-type disposable diaper in which both side edges in the longitudinal direction are joined to form an opening around the waist and a pair of leg openings, and an elastic body around the waist and an elastic body around the leg are arranged along each opening ,
The longitudinal opposite side edges of the front body and the back body are formed by a plurality of joints having a region having a predetermined length from the opening around the leg and a joint strength stronger than a joint joining other regions. A means for displaying the size of the diaper is disposed adjacent to the joint having the strong joint strength, and the leg of the wearer's leg is torn by tearing the joint having a strong joint strength on the leg opening side. A pants-type disposable diaper characterized in that it can be used by forming a leg-periphery opening of a size that fits around .

(2) The leg stretchable elastic body is composed of a plurality of stretchable elastic members, and at least one of the plurality of stretchable elastic members is positioned at or near the joint where the joint strength is strong. The pants-type disposable diaper according to item (1), wherein

(3) The region having a predetermined length from the opening around the leg is joined so as to form a plurality of joints having a strong joint strength at intervals of 10 to 40 mm in the longitudinal direction of the side edges. The pants-type disposable diaper according to (1) or (2).

(4) The pants-type disposable diaper according to (3), wherein a joint having a lower joint strength is disposed between the plurality of joints having a high joint strength.

(5) The peel strength of both side edges in the longitudinal direction including a joint portion having a strong joint strength in a predetermined length region from the opening around the leg is 6.5 to 35.0 N / 25 mm (1) The pants-type disposable diaper according to any one of items (1) to (4).

(6) Any one of the items (1) to (5), characterized in that a width dimension of a joint part joining the opposite longitudinal side edges of the front body and the back body is 3 to 20 mm. The pants-type disposable diaper according to item 1.

(7) The joints joining the opposite longitudinal side edges of the front body and the back body are a plurality of linear or belt-like joints arranged in parallel at intervals in the longitudinal direction. The pants-type disposable diaper according to any one of items (1) to (6).

(8) The joining portion joining the both side edges in the longitudinal direction is formed by heat-sealing the both side edges of the front body and the back body, and joining the joining portion having a strong joining strength. The pants-type disposable diaper according to any one of items (1) to (7), wherein the joint portion having a low strength is formed by changing a heat seal pattern.

  In the pants-type disposable diaper of the present invention, opposite longitudinal side edges of the front body and the back body are joined by a heat seal process or the like to form a waist opening and a pair of leg openings, and An area of a predetermined length from the leg opening on the side of the leg opening on the side of the leg opening on the side of the full length of both edges in the longitudinal direction is stronger than the joint joining the other areas on both sides of the longitudinal direction. Is characterized by being joined by a strong joint.

  The pants-type disposable diaper of the present invention having such a structure in which the leg opening side of both side edges in the longitudinal direction is joined by a joint having a strong joint strength is suitable for a large wearer around the leg. By opening the portion with strong joint strength on the opening side by tearing by hand the necessary length from the leg opening end, a leg opening of a size suitable for the wearer's leg can be formed, In addition, the leg opening has a function to sufficiently tighten the wearer's leg around in the state of tearing and spreading, so the fit is good and the function to prevent leakage of excrement from the leg opening is also sufficient. In preparation.

In the case of the present invention, the stretchable elastic body disposed in the opening around the leg is formed by a plurality of stretchable elastic members, and at least one stretchable elastic member is positioned at or near the joint where the joint strength is strong. It is preferable to arrange in.
By arranging the tip of the elastic elastic member in the vicinity of the joint where the bonding strength is strong in this way and providing a tightening function by the elastic elastic body around the leg, the leg opening is torn. Even when the leg is widened, the fit of the opening around the leg can be maintained in a good state, and the effect of the present invention can be further enhanced.

  Hereinafter, the pants-type disposable diaper of the present invention will be specifically described with reference to the drawings. However, the present invention is not limited to these in any way.

  FIG. 1 is a perspective view showing a state in which a pants-type disposable diaper of the present invention is assembled. In FIG. 1, a pants-type disposable diaper 1 has a front body 2, a back body 3, and a crotch part 4 positioned between the two body parts. The front body 2 and the back body 3 are connected to the crotch part 4. Folded together and joined together, the opposite side edges in the longitudinal direction of the front body 2 and the back body 3 are joined together by a linear or belt-like joint 5 which is long in the width direction of the diaper formed parallel to each other. A waist circumference opening 6 and a pair of leg circumference openings 7 are formed, a waist circumference elastic body 8 and a leg circumference elastic body 9 are arranged along each opening, and the waist circumference elasticity is also provided around the trunk. The body 10 is arranged and formed.

Further, in the region around the leg opening 7, a plurality of linear joints 11 having a stronger bonding strength than the joint 5 joining the region around the waist opening are formed at regular intervals and adjacent to each other. Between the joints 11 having a strong joint strength, a dotted line-like joint 12 having a joint strength lower than that of the joint 11 is formed.
Further, the leg elastic elastic body 9 is composed of a plurality of elastic elastic members 9 ′, 9 ′, etc., and each elastic elastic member 9 ′ is in the vicinity of the joint 11 where the joint strength is strong from the crotch part 4 and its waist. It arrange | positions so that a front-end | tip part may be located in the position of the circumference opening part 6 side.

  The pants-type disposable diaper of the present invention having such a configuration opens the joint portion 11 portion having a strong joint strength on the leg-periphery opening side of the joint portion by hand, even if the wearer has a different size around the leg. A leg opening that fits around the leg of the wearer can be formed by tearing sequentially from the part side, and further, the leg stretchable elasticity composed of a stretchable elastic member arranged from the crotch part to the vicinity of the joint 11 having a strong joint strength. The opening around the leg after tearing and expanding by the action of the body tightens the circumference of the wearer's leg, and it is possible to fit the leg opening around the wearer's leg reasonably and satisfactorily. Leakage of excrement from the surrounding opening can be prevented.

2 to 5 are enlarged plan views showing the shape and arrangement state of the joint part joining the both side edges in the longitudinal direction of the pants-type disposable diaper of the present invention.
2 to 5, each of the joint portion 5, the joint portion 11, and the joint portion 12 is formed by a plurality of linear joining patterns that are long in the width direction of the diaper. In FIG. A plurality of dotted joints 12 having a weak joint strength are formed between joints 11 having a strong joint strength formed on the side at constant intervals. In FIG. A joint portion 12 having a low joint strength formed of a single thin wire-like joint pattern is formed between the joint portions 11 formed at intervals and having a strong joint strength.

  Further, in FIG. 4, the joint portions 11 having a strong joint strength composed of two parallel line-shaped joint line patterns are formed at regular intervals, and in FIG. 5, the joint strength composed of a linear joint pattern is formed. Strong joints 11 are formed at regular intervals, and a display 13 indicating the size of the diaper adjacent to the joint 11 having strong joint strength is formed.

  4 and 5 show an example in which only the joint portion 11 having a strong joint strength is formed at both side edges on the side of the opening around the leg and the joint portion (12) having a low joint strength is not formed. A joint portion (12) having a low joint strength may be formed between adjacent joint portions 11 having a high joint strength. By forming a joint with low joint strength between adjacent joints with strong joint strength, the side edges of the front and rear bodies do not separate at the opening around the leg when wearing, so the appearance at the time of wearing is good It is preferable.

  In this invention, it is preferable that the space | interval between the junction parts 11 with strong adjacent joint strength is 10-40 mm. When the distance between adjacent joints with high bonding strength is less than 10 mm, the distance between the bonding parts with high bonding strength becomes too dense, so the used pants-type disposable diaper is peeled off at both side edges from the wearer. It becomes difficult to peel off when removing. Also, if the length between joints with strong joint strength exceeds 40 mm, the difference in size of the leg opening formed by the joint part with strong joint strength becomes large, so it is suitable for all wearers. I can't do that.

  Moreover, in this invention, it is preferable that the peeling strength of a longitudinal direction both-sides edge part including a junction part with strong joint strength of a junction part is 6.5-35.0 N / 25mm. When the peel strength is less than 6.5 / N25 mm, the joint strength of the joint portion becomes low, and the joint portion may peel off when the diaper is mounted. Further, if the peel strength increases beyond 35.0 N / 25 mm, the joint strength becomes too high, so that it is difficult to peel off when the used diaper is peeled off at the joint and removed from the wearer.

  In addition, as shown in FIG. 6, the said peeling strength cuts off the part containing the front body 2, the back body 3, and the junction part 5 of the underpants type disposable diaper 1 with a width of 25 mm, and each of the front body 2 and the back body 3 is each cut off. It is a measurement value of a 180 ° peel test which is attached to a chuck and measured by pulling in a direction of an arrow at a speed of 200 mm / min with a Tensilon tensile tester.

  Furthermore, in this invention, it is preferable that the width dimension (part shown by d in FIG. 2) of each junction part is 3-20 mm. When the width dimension of the joint portion is less than 3 mm, the strength of the joint portion 5 is particularly low, and the joint portion may be peeled off when the diaper is mounted. Also, if the width dimension of each joint becomes wider than 20 mm, it becomes difficult to peel off when used diapers are peeled off at each joint, and furthermore, when wearing clothes on wearing diapers, Both side edges become stiff and clothes are caught, making it difficult to wear.

  Moreover, in this invention, each junction part in a both-sides edge part can be formed by heat-sealing together the both-sides edge part of a front body and a back body. That is, it can be formed by superimposing both side edges of the front body and the back body in a palm-type shape and performing pressure melting or ultrasonic melting individually or by combining them together.

  Moreover, it is preferable to make the heat seal pattern which forms each junction part into a linear pattern long in the width direction of a diaper, as shown in FIGS. By forming such a linear heat-seal pattern, it is possible to impart appropriate strength to each joint, so that the joint does not peel off when the diaper is worn, and the used diaper is removed. In some cases, the joint can be easily peeled off by hand. Furthermore, by changing the length, thickness, shape, and the like of the heat seal pattern, it is possible to easily form a joint having a high joint strength and a joint having a low joint strength.

  In FIG. 1 to FIG. 5, a plurality of linear or belt-like heat seal portions are arranged in parallel at predetermined intervals in the longitudinal direction of both side edges as the shape and arrangement state of each joint at both side edges of the disposable diaper. Although the pattern is shown, the shape and arrangement state of each joint is not limited to these patterns. From the opening around the leg at the opposite longitudinal side edges of the front and back of the pants-type disposable diaper A region with a predetermined length can be joined so that it has a stronger joint strength than other regions. There are no particular restrictions on the shape and arrangement of the joints as long as the joints can be formed by tearing and spreading to form a leg-periphery opening of a size suitable for the wearer's leg.

  A pants-type disposable diaper according to the present invention comprises a front body, a back body, and a member forming a pant having a crotch portion located between both body folds and folded over the crotch portion, Join the opposite longitudinal edges of the back body to form an opening around the waist and a pair of leg openings, and arrange the elastic body around the waist and the elastic body around the legs along each opening. It is formed.

Specifically, a so-called integrated diaper comprising a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body disposed between these two sheets is used, and the top sheet is placed inside. The pants-type disposable diaper can be formed by folding and joining the side edges of the front and back bodies.
Alternatively, an absorbent main body composed of a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body disposed between the two sheets, and the absorbent main body are joined, and this is attached to the wearer. A so-called two-piece diaper consisting of an exterior member to be held against and held, folded with the absorbent main body inside, and joined to both side edges of the front and back body of the exterior member to form a pants-type disposable diaper it can.

  In the present invention, as the liquid-permeable top sheet, a non-woven fabric made of synthetic fiber or the like using polyethylene, polypropylene, polyester, or other thermoplastic resin as a raw material is used.

  In the present invention, as the liquid-impermeable back sheet, a moisture-permeable liquid-impermeable sheet such as a polyethylene sheet provided with micropores or a sheet obtained by adding a filler to a thermoplastic resin is used. . When such a sheet is used, stuffiness is improved and a comfortable wearing feeling can be obtained. Furthermore, a sheet having a laminated structure in which a cover sheet made of a nonwoven fabric is bonded to the outside of such a sheet can also be used.

  In the present invention, any absorber can be used as long as it is used for absorbent articles such as ordinary diapers. That is, a combination of a cotton-like pulp and a superabsorbent polymer, a material added with heat-fusible fibers, and the like can be used, and the whole is preferably wrapped with a hydrophilic sheet such as a tissue. In addition, a sheet-like absorbent body such as one in which a superabsorbent polymer layer is provided on one surface of a hydrophilic sheet and a superabsorbent polymer sandwiched between two hydrophilic sheets can also be used. Further, the shape of the absorber may be an hourglass shape or a rectangle.

  In the present invention, as the exterior member, a nonwoven fabric made of synthetic fibers using polyethylene, polypropylene, polyester, or other thermoplastic resins as raw materials can be used. The exterior member may be formed of a single layer of non-woven fabric, or may be formed by laminating two or more layers of non-woven fabric.

  In the present invention, the elastic elastic body disposed in the waist opening, leg opening and trunk periphery is a normal diaper such as natural, synthetic urethane thread, thread rubber, flat rubber, etc. The stretchable elastic member to be used can be used as it is, these stretchable elastic members are arranged in an expanded state, and are bonded and fixed by a hot melt adhesive or the like.

  The pants-type disposable diaper of the present invention is formed by joining the front body and the back body by joints formed along both longitudinal side edges, and the joint is 1/2 of the total length. A plurality of portions having high bonding strength are formed on the leg opening side. Therefore, even if the wearer has a different size around the leg, a leg opening that fits around the wearer's leg is formed by tearing a portion of the joint where the joint strength on the leg opening side is strong by hand. It is possible to fit well around the leg without damaging or rashing the wearer's skin, and further, preventing leakage of excrement from the opening around the leg Therefore, it is useful as a pants-type disposable diaper for adult incontinent persons including infants.

It is a perspective view which shows the state which assembled the underpants type disposable diaper of this invention. It is an enlarged view which shows the state of the junction part of the underpants type disposable diaper of this invention. It is an enlarged view which shows the state of the junction part of the underpants type disposable diaper of this invention. It is an enlarged view which shows the state of the junction part of the underpants type disposable diaper of this invention. It is an enlarged view which shows the state of the junction part of the underpants type disposable diaper of this invention. It is explanatory drawing which shows the measuring method of the peeling strength of the junction part of the underpants type disposable diaper of this invention.

Explanation of symbols

1: Pants-type disposable diaper 2: Front body 3: Back body 4: Crotch 5: Joint 6: Opening around waist 7: Opening around leg 8: Elastic body around waist 9: Elastic body around leg 9 ' ： Elastic elastic member 10 ： Elastic elastic body around the waist 11 ： Joint portion with high joint strength 12 ： Joint portion with low joint strength 13 ： Indication of diaper size d ： Width dimension of the joint portion

Claims (8)

It has a front body, a back body, and a crotch part located between these two body parts. The front body and the back body are folded and overlapped at the crotch part, and the front body and the back body are opposed to each other in the longitudinal direction. In a pants-type disposable diaper in which both side edges are joined to form a waist circumference opening and a pair of leg circumference openings, and a waist circumference elastic body and leg circumference elastic body are arranged along each opening,
The longitudinal opposite side edges of the front body and the back body are formed by a plurality of joints having a region having a predetermined length from the opening around the leg and a joint strength stronger than a joint joining other regions. A means for displaying the size of the diaper is disposed adjacent to the joint having the strong joint strength, and the leg of the wearer's leg is torn by tearing the joint having a strong joint strength on the leg opening side. A pants-type disposable diaper characterized in that it can be used by forming a leg-periphery opening of a size that fits around .   The leg elastic elastic body is composed of a plurality of elastic elastic members, and one or more of the elastic elastic members are arranged so that the distal end portion is located at or near the bonding portion where the bonding strength is strong. The pants-type disposable diaper according to claim 1, wherein   The region having a predetermined length from the leg-hole opening is joined to form a plurality of joints having a strong joint strength at intervals of 10 to 40 mm in the longitudinal direction of the side edges. The underpants type disposable diaper of Claim 1 or Claim 2.   The pants-type disposable diaper according to claim 3, wherein a joint portion having a lower joint strength is formed between the plurality of joint portions having a high joint strength.   The peel strength at both side edges in the longitudinal direction including a joint portion having a strong joint strength in a region of a predetermined length from the opening around the leg is 6.5 to 35.0 N / 25 mm. The underpants type disposable diaper of any one of claim | item 4.   The width dimension of the joint part which joins the longitudinal direction both side edge part which the said front body and back body oppose is 3-20 mm, The any one of Claims 1-5 characterized by the above-mentioned. Pants-type disposable diaper.   The joints joining the opposite longitudinal side edges of the front body and the back body are a plurality of linear or belt-like joints arranged in parallel at intervals in the longitudinal direction. The underpants-type disposable diaper according to any one of claims 1 to 6.   The joint part joining the both side edges in the longitudinal direction is formed by heat-sealing both side edges of the front body and the back body, and the joint part having a strong joint strength and the joint strength is weak. The pants-type disposable diaper according to any one of claims 1 to 7, wherein the joint portion is formed by changing a heat seal pattern.

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