JP2005211179A - Pants-type disposable diapers - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pants-type disposable diaper having an excellent wearing feeling in which a joint does not irritate a wearer's skin when worn and does not give unpleasant feeling.
SOLUTION: A front body, a back body, and a crotch portion positioned between the front and back bodies, and opposite side edges of the front body and the back body are joined to each other and a pair of openings around the waist. In a pants-type disposable diaper in which a leg opening is formed and a waist elastic elastic member and a leg elastic elastic member are arranged with a predetermined width along each opening,
The opposite side edges of the front body and the back body are joined so as to form a joint having a predetermined width over the entire length along both sides, and at least the waist opening of the joint is opened. A pants-type disposable diaper, wherein a region having a predetermined length in the longitudinal direction from the side end and / or a region having a predetermined length in the longitudinal direction from the leg opening side end is a non-stretchable joint.
[Selection] Figure 1

Description

  The present invention relates to a pants-type disposable diaper formed in a pants shape in advance. More specifically, the present invention relates to a pants-type disposable diaper having an excellent wearing feeling in which a joint portion does not irritate a wearer's skin when worn and does not give discomfort.

  Conventionally, a pants-type disposable diaper has a waist opening and a pair of leg openings formed by joining the left and right side edges of the front and back bodies, and elastic around the waist along each opening. A member in which a member and a leg elastic member are arranged is known. Such pant-type disposable diapers need to be breathable to prevent stuffiness caused by water vapor such as sweat and urine of the wearer, and the joints may be inadvertently torn when worn. In addition, tearing and separation must be performed easily at the time of disposal. For this reason, disposable diapers (Patent Document 1, Patent Document 2, and Patent Document 3) have been proposed that define the dimensions, shape, arrangement method, area, and the like of the bonding lines that form the joints of the side edges of the front and rear bodies.

  However, the pants-type disposable diaper as described above is generally formed of a non-woven fabric or film made of a heat-meltable resin, and the side edges of the front and back bodies are joined by heat sealing such as heat melting or ultrasonic melting. Therefore, the resin in the portion subjected to the heat sealing process is melted and hardened, and a hard joint is easily formed. In particular, because the elastic elastic members are arranged in the waist opening and leg opening portions that easily come into contact with the wearer's skin when the diaper is worn, the joint part also contracts due to the contraction of the elastic elastic member. It becomes harder to form. Therefore, when wearing such a diaper, the skin is stimulated by the hard joint between the opening around the waist and the opening around the leg, and there is a problem of giving the wearer discomfort. As having the problem of damaging the wearer's skin.

In order to improve this problem, as a method of imparting softness to the joint, one non-joint line is provided in the joint along the longitudinal direction of the joint (Patent Document 4, Patent Document 5), Or what provided two non-joining lines (patent documents 6) etc. is proposed.
No. 8-7850 Japanese Utility Model Publication No. 7-34814 JP-A-7-227407 Japanese Patent Laid-Open No. 10-137287 JP 2003-24382 A JP 2003-38572 A

  In the case of a diaper in which a non-bonding line is provided at the above-described bonding portion, the softness of the bonding portion is improved because the portion provided with the non-bonding line is soft. However, at the waist opening portion and the leg opening portion, the joint portion bends at the non-joining line due to the contracting action of the elastic elastic member, and a wrinkle is formed. Therefore, the softness is not sufficiently improved.

  The present invention overcomes the problems of the conventional pants-type disposable diaper and stimulates the wearer's skin at least in part with respect to the joint of the waist opening and the joint of the leg opening when worn. It is an object of the present invention to provide a pants-type disposable diaper having an excellent feeling of wear with reduced causes of discomfort.

  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 portion positioned between the front and back bodies, and joins both opposite side edges of the front body and the back body to open an opening around the waist and a pair of legs. In a pants-type disposable diaper in which a surrounding opening is formed and a waist elastic elastic member and a leg elastic elastic member are arranged with a predetermined width along each opening,
The opposite side edges of the front body and the back body are joined so as to form a joint having a predetermined width over the entire length along both sides, and at least the waist opening of the joint is opened. A pants-type disposable diaper, wherein a region having a predetermined length in the longitudinal direction from the side end and / or a region having a predetermined length in the longitudinal direction from the leg opening side end is a non-stretchable joint.

  (2) The pants-type disposable diaper according to (1), wherein the non-stretchable joint is a joint where no stretchable elastic member is disposed.

  (3) The non-stretchable joint is the joint of the stretchable elastic members arranged so as to extend to the joint region along both the waist opening and the leg opening. The pants-type disposable diaper according to (1), which is a joint formed by cutting a stretchable elastic member portion extending in a partial region.

  (4) The joining portion is formed by a number of linear heat seal patterns arranged to be long in the width direction of the joining portion. Any of the items (1) to (3), A pants-type disposable diaper according to claim 1.

(5) The linear heat-seal pattern is arranged in a discontinuous state having a non-heat-sealed part in a central region in at least a part of the joint part. Pants-type disposable diapers.

  In the pants-type disposable diaper of the present invention, the opposite side edge portions of the front body and the back body are joined to each other by a joint portion having a predetermined width extending in the longitudinal direction of the diaper formed on both side edges, and The joint is in a non-stretchable state in the vicinity of the opening around the waist and in the vicinity of the opening around the leg. In the disposable diaper of the present invention having such a configuration, the portions in the vicinity of the opening around the waist and the portion in the vicinity of the opening around the legs are in a non-stretchable state, so that these portions do not contract. As a result, the joint does not become hard due to contraction and wrinkles are formed, so that it does not irritate the wearer's skin when wearing a diaper and gives discomfort, It has an excellent wearing feeling.

  As a means for making only the above-mentioned joint portion in the joint portion non-stretchable, a stretchable elastic member is not disposed in the vicinity of the waist opening portion and the leg opening portion of the joint portion, or The means of cutting the elastic elastic member already arranged in these portions is effective.

  In the case of the present invention, since the joining portion is formed with a linear heat seal pattern that is long in the width direction, the joining portion is given appropriate strength, so that the joining portion is not torn when wearing a diaper, and When removing a used diaper, since the joint can be easily torn by hand, a diaper that is easy to handle can be obtained.

  Furthermore, since the heat seal pattern is arranged in a discontinuous state where the central region is cut in at least a part of the joint portion, softness is imparted to the joint portion, so that a diaper having excellent wearing feeling can be obtained. Can be obtained.

  Hereinafter, the pants-type disposable diaper of the present invention will be described in detail with reference to the drawings, but of course, the present invention is not limited thereto.

  FIG. 1 is a perspective view showing an example of a pants-type disposable diaper according to the present invention. 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, and opposite side edges of the front body 2 and the back body 3. 5 are overlapped and joined by the joint 6 to form a waist circumference opening 7 and a pair of leg circumference openings 8, and a waist circumference elastic member 9 made of a plurality of rubber threads along each opening, A leg elastic member 10 is arranged, and a waist elastic member 11 made of a plurality of rubber bands is arranged at the waist between the waist opening 7 and the leg opening 8. Yes.

  In FIG. 1, the pant-type disposable diaper 1 includes a waist elastic elastic member 9 and a leg elastic elastic member 10 arranged along the respective openings up to the vicinity of the joint 6. Is not arranged. By disposing the elastic member 9 around the waist and the elastic member 10 around the leg in this manner, the waist-side opening side end region and the leg-around opening side end region of the joint portion 6 are in a non-stretchable state. Yes. However, the waist elastic elastic member 11 may be in a state where it extends into the joint portion 6 and imparts stretchability to the joint region.

  FIG. 2 shows an example different from FIG. 1 and is a plan view showing a pants-type disposable diaper of the present invention. In FIG. 2, the pants-type disposable diaper 1 is an elastic stretch formed by attaching a plurality of elastic yarns to a nonwoven fabric along the waist opening 7 on the outer surface side (the side facing the wearer's clothing) of the diaper 1. An elastic member 12 around the waist made of tape is disposed up to the vicinity of the joint 6, and an elastic member 10 around the leg made of a plurality of thread rubbers is formed along the leg openings 8. 6 is arranged to the vicinity. Also in this example, the waist elastic elastic member 11 may be in a state of imparting elasticity to the joint region.

  In addition, although the example which has arrange | positioned the waist elastic | stretch elastic member 7 which consists of an elastic elastic tape in the outer surface side of the diaper 1 was shown in FIG. 2, it arrange | positions in the inner surface side (side facing a wearer's skin) of the diaper 1. May be. Also, the elastic elastic member 10 around the legs can use the elastic elastic tape described above instead of the rubber thread.

  FIG. 3 shows an example different from FIGS. 1 and 2, and is an enlarged plan view showing a state of the joint portion of the pants-type disposable diaper of the present invention. In FIG. 3, the joining portion 6 is formed by arranging a large number of heat seal patterns 13 made of linear melting portions that are long in the width direction of the joining portion 6 at a predetermined interval. Further, the waist elastic member 9 and the leg elastic member 10 are arranged up to the joint 6 along the waist opening 7 and the leg opening 8 respectively, but are cut at the joint 6. It is not stretched. In this manner, the elastic elastic members 9 and 10 are cut at the joint 6 to be in a non-stretchable state, so that the waist-side opening side end region and the leg-hole opening side end region of the joint 6 are non-stretchable. Can be in a state.

  Furthermore, since the joining part 6 is formed with a linear heat seal pattern 13 that is long in the width direction of the joining part 6, moderate strength can be imparted to the joining part, so that the joining part is torn when the diaper is worn. In addition, when removing a used diaper, the joint can be easily torn by hand, so that a diaper that is easy to handle can be obtained.

  In addition, the elastic elastic member may be cut using a normal cutter device composed of a cutter roll and an anvil roll, or stretched when forming a joint with a heat seal device composed of a heat seal roll and an anvil roll. The elastic member may be melt-cut and is not particularly limited. Also in this example, the waist elastic elastic member 11 may be in a state of imparting elasticity to the joint region.

  FIG. 4 shows an example different from FIG. 3 and is an enlarged plan view showing the state of the joint portion of the pants-type disposable diaper of the present invention. In FIG. 4, the joint portion 6 is formed by arranging a large number of linear heat seal patterns 13 that are long in the width direction of the joint portion 6, and the waist elastic elastic member 9 and the leg elastic elastic member 10 are The point that the non-stretchable joint is formed by cutting at the joint 6 is the same as in the case of FIG. 3, but in the central region in the longitudinal direction of the joint 6, the heat seal pattern 13 is not at the center. The discontinuous portions 14 having the heat seal portions are arranged in a formed state. Thus, as the heat seal pattern 13 that forms the joint portion 6, by arranging the discontinuous portion 14 in the center portion, softness is imparted to the joint portion. You can get an excellent diaper.

  In addition, in FIG. 4, although the example which formed the discontinuous part 14 in the heat seal pattern 13 only of the longitudinal direction center area | region of the junction part 6 was shown, it has the discontinuous part 14 over the full length of the junction part 6. FIG. You may form a heat seal pattern, or you may form the heat seal pattern which has the discontinuous part 14 only in the edge part area part of the opening part around the waist of the junction part 6, and the leg part opening part side part. There is no particular limitation.

  The pants-type disposable diaper of the present invention folds a member forming a pant having a front body, a back body, and a crotch part positioned between the front and back bodies into two through the crotch part, The opposite side edges of the back body are joined to form a waist opening and a pair of leg openings, and an elastic elastic member is disposed along each opening.

  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 both 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. Use a so-called two-piece diaper consisting of an exterior member to hold and hold it, fold it with the absorbent main body inside, and join both side edges of the front and back body of the exterior member as described above to make a pants-type disposable diaper It can also be formed.

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

  In the present invention, as the liquid-impermeable back sheet, a moisture-permeable liquid-impermeable sheet such as a polyethylene sheet having 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 liquid-impermeable sheet with moisture permeability 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 an exterior member in the case of a pants-type disposable diaper having an exterior member, a nonwoven fabric made of synthetic fibers made from polyethylene, polypropylene, polyester, or other thermoplastic resin can be used. The exterior member may be formed of one layer of nonwoven fabric or may be formed by laminating two or more layers of nonwoven fabric.

  In the present invention, the elastic elastic member disposed in the waist opening, leg opening and waist circumference is used for ordinary diapers such as natural and synthetic urethane threads, thread rubber, flat rubber, etc. The stretchable elastic member to be used can be used as it is, and these stretchable elastic members are arranged in an expanded state and bonded and fixed by a hot melt adhesive or the like. Furthermore, a stretchable elastic tape formed by attaching these stretchable elastic members to a nonwoven fabric can also be used.

  In the present invention, the joining of both side edges of the member forming the pants is performed by heat sealing. In other words, both side edges of the front and rear bodies of the member forming the pants can be overlapped in a palm-like shape protruding outward, and pressure melting or ultrasonic melting can be performed individually or in combination. As a result, joints are formed on both side edges.

  In the present invention, the width dimension (the dimension including the discontinuous part when the discontinuous part is formed) of the joint part on both side edges is the same as the length of the heat seal pattern, and is 3 to 15 mm. Is preferred. When the width dimension is less than 3 mm, the strength of the joint decreases, and it becomes easy to tear when worn, and when it exceeds 15 mm, the appearance of the diaper deteriorates and is worn when clothing is worn on the diaper. It becomes difficult to let you.

  Furthermore, when a discontinuous part is formed in the heat seal pattern, the length is preferably 5 to 40% of the length of the heat seal pattern. When the length of the discontinuous portion is less than 5%, it becomes difficult to impart softness to the joint portion, and when the length exceeds 40%, the strength of the joint portion decreases.

  In addition, the length of the non-stretchable joint at the joints on both side edges from the waist-side opening side end and the leg-hole opening side end is preferably 10 mm or more, and more preferably 20 mm or more. preferable. When the length of the non-stretchable joint is less than 10 mm, when the stretchable joint is formed adjacent to the non-stretchable joint, the wrinkles are easily formed in the non-stretchable joint due to the influence thereof. It becomes inferior in wearing feeling of diapers.

  In the pants-type disposable diaper according to the present invention, the opposite side edge portions of the front body and the back body are joined by the joint portions formed on the both side edge portions, and the joint portion is located on the side end of the opening around the waist. One or both of the head region and the leg-hole opening side end region are in a non-stretchable state. With such a structure of the joint portion, the pants-type disposable diaper of the present invention is such that at least one of the waist-side opening side end portion and the leg-around opening side end portion of the joint portion contracts to form a heel. Because it does not become hard and does not become hard, it suppresses discomfort by stimulating the skin of the wearer when wearing a diaper, and has an excellent wearing feeling. Useful as a diaper for.

It is a perspective view which shows one example of the underpants type disposable diaper of this invention. It is a top view which shows the other example of the underpants type disposable diaper of this invention. It is another enlarged example of the underpants type disposable diaper of this invention, and is an enlarged plan view which shows the state of a junction part. It is another enlarged example of the underpants type disposable diaper of this invention, and is an enlarged plan view which shows the state of a junction part.

Explanation of symbols

1: Pants-type disposable diaper 2: Front body 3: Back body 4: Crotch part 5: Side edge part 6: Joint part 7: Waist circumference opening part 8: Leg circumference opening part 9: Waist circumference elastic member 10: Leg circumference Elastic elastic member 11: Elastic elastic member 12 around waist: Elastic elastic member 13 around waist: Heat seal pattern 14: Discontinuous part

Claims (5)

It has a front body, a back body, and a crotch part located between these front and back bodies, and joins the opposite side edges of the front body and the back body to open the waist area and a pair of leg openings. In a pants-type disposable diaper in which a waist elastic elastic member and a leg elastic elastic member are arranged with a predetermined width along each opening,
The opposite side edges of the front body and the back body are joined so as to form a joint having a predetermined width over the entire length along both sides, and at least the waist opening of the joint is opened. A pants-type disposable diaper, wherein a region having a predetermined length in the longitudinal direction from the side end and / or a region having a predetermined length in the longitudinal direction from the leg opening side end is a non-stretchable joint.   The pants-type disposable diaper according to claim 1, wherein the non-stretchable joint is a joint where no stretchable elastic member is disposed.   The non-stretchable joint is located within the joint area of the stretchable elastic member disposed so as to extend to the joint area along both the waist opening and the leg opening. The pants-type disposable diaper according to claim 1, wherein the pants-type disposable diaper is a joint formed by cutting a stretchable elastic member portion extending to a point.   The pants according to any one of claims 1 to 3, wherein the joint portion is formed by a large number of linear heat seal patterns arranged to be long in the width direction of the joint portion. Type disposable diaper. 5. The pants according to claim 4, wherein the linear heat seal pattern is arranged in a discontinuous state having a non-heat seal portion in a central region in the width direction in at least a part of the joint portion. Type disposable diaper.

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