JP2005211136A - Disposable diaper having fastening tape - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disposable diaper preventing from soiling the clothes and the skin of a wearer when wearing the diaper, eliminating from getting stuffy or contact dermatitis, facilitating the locking of a fastening tape and having superior aesthetic appearance. <P>SOLUTION: This developing type diaper is provided with a liquid permeable top sheet, a liquid impermeable and gas permeable back sheet, and an absorbent body disposed between the both sheets, fastening tapes 11 are disposed in both side edge parts of either one of the front part or the back part, and a front sheet 14 engaged with the fastening tape is disposed on the back sheet surface of the other part. This diaper is characterized in that the front sheet is composed of a stacked body comprising a first non-woven fabric layer including a heat melting fiber and a second non-woven fabric layer disposed thereunder, the second non-woven fabric layer is provided with a printing part, the first non-woven fabric layer is formed of at least a single linear filmed part 15 treated by the heat melting along the longitudinal direction of the diaper, and the printing part in the portion is visually recognized denser than the circumferential part. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a deployable disposable diaper having a fastening tape. More specifically, the present invention relates to a disposable diaper in which a fastening tape can be easily attached and detached, and which has improved stuffiness and blurring.

  The used diaper is basically formed from a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body disposed between the two sheets, such as urine excreted when worn. The excrement is held on the absorbent body 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.

  In general, unfolded diapers have a fastening tape on the left and right edges of the back body, and a front tape (landing tape) for removably engaging the fastening tape on the back sheet surface of the front body. The diaper is placed on the wearer by placing and joining the fastening tape to the front tape.

  As a combination of such a fastening tape and a front tape, a combination of a fastening tape having an adhesive layer and a front tape made of various films (for example, Patent Document 1, Patent Document 2, and Patent Document 3), a machine A combination of a fastening tape having a hook material of a conventional fastener and a front tape made of a loop material capable of engaging the hook material (for example, Patent Document 4, Patent Document 5, and Patent Document 6) is known. However, if the fastening tape using an adhesive is accidentally adhered to a place other than the front tape when the diaper is attached, or if dirt adheres to the surface of the adhesive layer, the adhesive strength of the tape Has a problem that it cannot be reused. Therefore, recently, a fastening tape using a hook material has become mainstream.

In addition, recently, for the design reason that the fastening tape is symmetrized symmetrically or in a desired tightening condition, it helps to quickly engage, and the decorative effect is enhanced by giving a pleasant design. In some cases, a mark or a pattern that serves as a mark for the engagement position is printed on the front tape. For example, a fastening strip tape with a pattern printed on the center of the landing tape is attached, and the engagement position of the fastening tape is confirmed. Used as a mark (Patent Document 7), printed with a mark of a fastening position of a hook material on a base film constituting a front sheet having a loop material or the like (Patent Document 8), an outer sheet made of a nonwoven fabric Alternatively, a sheet provided on the lower side thereof with target printing that serves as a guide for the fixing position of the hook material (Patent Document 9) is proposed. That. Furthermore, the loop material is melted to form a filmed portion, and the color of the adhesive applied to the opposite surface of the loop material is recognized deeply in that portion, so that the hook material can be used as a guide (patent document) 10) has also been proposed.
Japanese Utility Model Publication No. 58-83405 JP 58-203101 A JP 59-94604 JP-A-62-206001 JP-A 63-309606 JP-A-1-61501 JP-A-9-248316 JP 2001-70340 A JP 2002-253608 A JP-A-10-309299

  However, in the case of a type provided with a landing tape, the printing applied to the strip-like tape may be peeled off due to the manufacturing process of the diaper or friction during wearing of the diaper, degrading the product quality, and soiling the wearer's clothes and skin. Sometimes. In addition, if the front seat is provided, the base film that makes up the front seat may be non-breathable or poorly breathable, so the part where the front seat is placed when wearing a diaper is likely to be swollen and may cause blurring. There is sex. Furthermore, in the case where the front sheet is not used, since the hook material is directly engaged with the outer sheet made of nonwoven fabric disposed on the back sheet, when the hook material is repeatedly attached and detached, the outer sheet becomes fluffy. There is a possibility that the engaging force may be reduced or the outer sheet may be torn, and when printing is performed on the outer sheet, the print will be peeled off due to the manufacturing process of the diaper or friction during wearing of the diaper, resulting in reduced product quality. Or may stain the wearer's clothes and skin. In addition, in the case of a type in which a looped portion is formed on the loop material, an adhesive is applied to the entire surface opposite to the filmed surface of the loop material. .

  The present invention overcomes the problems of the conventional diaper with the mark printed on the conventional front sheet, does not contaminate the wearer's clothes and skin when wearing the diaper, is free of stuffiness and blurring, and has a fastening tape. It provides easy-to-use diapers with excellent aesthetics.

  The present invention for solving the above-mentioned problems of conventional diapers includes the following inventions.

(1) A liquid-permeable top sheet, a liquid-impermeable and breathable back sheet, and an absorbent body disposed between the two sheets, and one of the front body and the back body Fastening tape provided with a hook material of a mechanical fastener is arranged on both side edges of the body, and a front seat that can be engaged with the fastening tape is arranged on the surface on the back sheet side of the other body In unfolded diapers,
The front sheet is composed of a laminate of a first nonwoven layer containing at least a heat-meltable fiber and a second nonwoven layer disposed thereunder, and on the surface of the second nonwoven layer in contact with the first nonwoven layer. A printing portion is provided, and the first nonwoven fabric layer is subjected to a heat melting treatment along the longitudinal direction of the diaper to form at least one, preferably two or more linear film portions. The use diaper is characterized in that when viewed from the surface of the first nonwoven fabric layer, the printed portion of the second nonwoven fabric layer is visually recognized darker than the surrounding portion in the filmed portion.

(2) said first nonwoven fabric layer of the front sheet "JIS L 1906: mass per unit area measured according to 2000 (g / m ^2)" that the basis weight being defined is 10 to 30 g / m ² as The disposable diaper described in (1), characterized by

(3) The use according to (1) or (2), wherein the front seat has an air permeability measured according to JIS L 1906: 2000 of 30 to 200 cc / m ² · sec. Diapers.

(4) The first nonwoven fabric layer and the second nonwoven fabric layer in the front sheet both contain heat-meltable fibers, and both layers are laminated and bonded by a heat-melt bonding process (1) Item diaper according to any one of items (3) to (3).

(5) The front sheet is made of a laminate having a third non-woven fabric layer under the second non-woven fabric layer, and each of the layers being joined by a hot melt bonding process. The disposable diaper according to any one of items (4) to (4).

(6) Among the nonwoven fabrics forming the front sheet, the fineness of the nonwoven fabric forming the outermost layer (first nonwoven fabric layer) is 1 to 3 denier, any one of (1) to (5) The disposable diaper described in item 1.

  The used diaper of the present invention includes a first nonwoven layer containing at least a heat-meltable fiber and a second nonwoven layer disposed under the front sheet for engaging a fastening tape provided with a hook material. The second nonwoven fabric layer is provided with a printing portion, and the first nonwoven fabric layer is formed with a linear film portion, and when viewed from the surface of the first nonwoven fabric layer, a film is formed. Since the printed part of the second nonwoven fabric layer is visible darker than the surrounding part in the part, the filmed part can be used as a mark for confirming the engagement position of the fastening tape. The tape can be easily fixed at an appropriate position. Moreover, since the whole is formed with the nonwoven fabric, the air permeability of the whole diaper becomes high, a swelling and a fog are prevented, and a comfortable wear feeling can be given to the wearer. Furthermore, since the printing part is provided in the second nonwoven fabric layer and the first nonwoven fabric layer is disposed so as to cover the upper surface, it is possible to prevent the printing part from peeling off when the fastening tape is attached / detached. Does not stain the skin.

In the case of the front sheet of the disposable diaper of the present invention, the basis weight of the first nonwoven fabric layer, that is, “mass per unit area (g / m ² ) measured according to JIS L 1906” (hereinafter simply “weight per unit”). Is set to 10 to 30 g / m ² , so that the printed portion of the second nonwoven fabric layer can be easily confirmed from the first nonwoven fabric layer portion that is not formed into a film. By devising, the decorative effect of diapers can be further enhanced.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a used diaper of the present invention will be described in detail with reference to the drawings, but of course the present invention is not limited by these.

  FIG. 1 is a partially cut-out plan view of the used diaper of the present invention as viewed from the top sheet side, and FIG. 2 is a view of the used diaper of the present invention as viewed from the back sheet side. FIG. 3 is a partially enlarged view of the front seat shown in FIG. 2, and FIG. 4 is an enlarged cross-sectional view showing a state in which the front seat shown in FIG. 2 is cut along the X-X 'line.

  1 and 2, a used diaper 1 basically includes a liquid-permeable top sheet 2, a liquid-impermeable back sheet 3, and an absorbent body 4 disposed between the two sheets. The front body 20 is located on the abdomen side of the wearer, the back body 21 is located on the back side, and the crotch part 22 is located between the front and back bodies. Further, elastic bodies 13 around the waist are disposed at both ends in the longitudinal direction of the diaper 1, and elastic bodies 13 ′ around the legs are disposed at both side edges in the longitudinal direction. On the outside, there is a fixing portion 8 inside the leg elastic body 13 ′, the free portion 9 is located inside the fixing portion 8, and the elastic body 10 is arranged on the free end side of the free portion 9. A pair of solid gathers 7 are arranged.

  Further, the used diaper 1 includes a cover sheet 5 made of a non-woven fabric covering the back sheet 3 on the outer surface of the back sheet 3, and a cover sheet 5 portion and a top sheet extending from both side edges of the back sheet 3. The side flaps 6 are formed by bonding the two side edge regions, and a fastening tape 11 having a hook material 12 of a mechanical fastener is disposed on both side edges of the side flap 6 of the back body 21. A front sheet 14 that can be engaged with the fastening tape 11 is disposed on the upper surface of the cover sheet 5 of the front body 20, and the front sheet 14 is subjected to heat melting treatment along the longitudinal direction of the diaper 1. As a result, a linear film portion 15 is formed.

In the disposable diaper of the present invention, the front sheet 14 preferably has an air permeability measured in accordance with JIS L 1906: 2000 of 30 to 200 cc / m ² · sec. When the air permeability of the front seat is within this range, the air permeability of the portion where the front seat of the diaper is arranged becomes good, and stuffiness and fogging can be prevented. When the air permeability is less than 30 cc / m ² · sec, the air permeability of the front seat is deteriorated, so the diaper is easily stuffed, and when the air permeability exceeds 200 cc / m ² · sec, it is cut in the diaper manufacturing process. When the front sheet is sucked and transferred with air, it becomes difficult to be sucked and the manufacturing efficiency is lowered.

Preferred examples of the front seat having such air permeability are shown in FIGS.
In FIG. 3, the front sheet 14 is formed with a filmed portion 15, and is further provided with a printing unit 16. In this case, since the filmed portion 15 has higher transparency than the surrounding portions, the printed portion 16 is visually recognized darker than the surrounding portions in the filmed portion 15.

  In FIG. 4, the front sheet 14 includes a first nonwoven fabric layer 17, a second nonwoven fabric layer 18 disposed under the first nonwoven fabric layer 17, and a third nonwoven fabric disposed under the second nonwoven fabric layer 18. The layer 19 is made of a three-layer nonwoven fabric, and is formed by laminating each layer and joining them by a hot melt bonding process. Moreover, the printing part 16 is provided on the 2nd nonwoven fabric layer 18, the 1st nonwoven fabric layer 17 is laminated | stacked so that the printing part 16 may be covered, and also the 1st nonwoven fabric layer 17 is heat-melt-processed. A portion 15 formed as a film is formed. In addition, as a method of hot melt bonding treatment for bonding each layer, heat embossing treatment, heat sealing treatment, ultrasonic sealing treatment, etc. can be performed, and these methods can be used alone or in combination of a plurality of methods. It can be carried out.

In the case of the present invention, the first nonwoven fabric layer 17 preferably has a basis weight of 10 to 30 g / m ² . When the weight per unit area is less than 10 g / m ² , the strength of the nonwoven fabric layer is reduced, so that the engagement with the fastening tape is reduced. When the fabric weight exceeds 30 g / m ² , the nonwoven fabric layer becomes thick and the printed portion passes through the nonwoven fabric layer. It becomes difficult to confirm and the decorative effect becomes inferior. Thus, since the printing part can be prevented from peeling off when the diaper is attached and detached by using the front sheet having a configuration in which the nonwoven fabric layer is laminated so as to cover the printing part, the wearer's clothes and skin are not soiled. In the present invention, the second nonwoven fabric layer preferably has a lower air permeability than the first nonwoven fabric layer. That is, it is preferable to use a non-woven fabric that is denser than the first non-woven fabric layer for the second non-woven fabric layer. By using such a non-woven fabric for the second non-woven fabric layer, a good printed surface can be obtained when a printing portion is provided. Can be formed.

  In the present invention, the printed portion provided in the second nonwoven fabric layer of the front sheet may be a straight line or a curved line of a monochromatic or multicolor configuration, or may be a figure such as a triangle, a circle, or a rectangle. It may be a pattern of various characters or the like, and is not particularly limited.

  Hereinafter, although the material used in this invention is demonstrated, this invention is not restrict | limited at all by these.

  In the present invention, the front sheet can be formed of a nonwoven fabric containing synthetic fibers made from polyethylene, polypropylene, polyester, or other heat-meltable resin. The said nonwoven fabric is comprised from what mixed the fiber which consists of the said raw material synthetic fiber single-piece | unit, or the core sheath fiber which uses two types of synthetic resin raw materials, or multiple types. Moreover, the nonwoven fabric may be manufactured from a heat-fusible synthetic fiber and other natural fibers or a mixed raw material of synthetic fibers. Furthermore, the constituent fibers and the manufacturing method of the nonwoven fabric of each layer in the nonwoven fabric laminate constituting the front sheet may be the same or different.

  Moreover, it is preferable that the fineness of the nonwoven fabric which forms an outermost layer (1st nonwoven fabric layer) among the nonwoven fabrics which form a front sheet is 1-3 denier, and when it is in this range, it is favorable with a hook material. Engagement force is obtained. When the fineness is less than 1 denier, the strength of the nonwoven fabric is reduced, and when the fineness is greater than 3 denier, the engaging force with the hook material is reduced.

  In the disposable diaper of the present invention, as the liquid-permeable top sheet, a nonwoven fabric made of synthetic fiber or the like made of polyethylene, polypropylene, polyester, or other thermoplastic resin as a raw material is subjected to a hydrophilic treatment. .

  In the disposable diaper of the present invention, as the liquid-impermeable and breathable back sheet, a moisture-permeable sheet such as a polyethylene sheet provided with micropores or a sheet stretched by adding a filler to a thermoplastic resin is used. Some liquid impervious sheet 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 disposable diaper of the present invention, any absorber can be used as long as it is used for absorbent articles such as ordinary disposable diapers. In other words, a combination of cotton-like pulp and superabsorbent polymer (SAP), a mixture of heat-fusible fibers, etc. can be used, and the whole is wrapped in a hydrophilic sheet such as a tissue. Is preferred. In addition, a sheet-like absorbent body such as one provided with a SAP layer on one side of a hydrophilic sheet and one in which SAP is sandwiched between two hydrophilic sheets can also be used. The shape of the absorber may be an hourglass shape or a rectangle.

  In the disposable diaper of the present invention, the side flap can be formed of a nonwoven fabric made of synthetic fiber made of polyethylene, polypropylene, polyester, or other thermoplastic resin, and the top sheet alone or the back The cover sheet portion extending from both side edges of the sheet may be formed alone, or the top sheet and the back sheet may be formed by laminating portions extending from both side edges of the absorber. Furthermore, it can also be formed by laminating the non-woven fabric on the portion of the backsheet that extends outward from both side edges of the absorber.

  In the present invention, it is preferable to arrange a pair of three-dimensional gathers along the longitudinal direction of the used diaper. The three-dimensional gather can be formed of various materials. For example, it can be formed using a breathable water-repellent nonwoven fabric made of synthetic fibers made from polyethylene, polypropylene, polyester, or other thermoplastic resins. Or you may use a wide thing as a nonwoven fabric which forms a side flap, and may form a three-dimensional gather in the part extended to the inner side of a diaper while forming a side flap. Furthermore, a wide thing may be used as a top sheet, and a three-dimensional gather may be formed in the part extended from the both-sides edge of the absorber of a top sheet.

  In addition, an elastic body is disposed in the distal end region of the free part of the three-dimensional gather. As the elastic body, it is possible to use elastic bodies that are used for ordinary diapers such as natural and synthetic urethane threads, thread rubber, and flat rubber as they are, and these elastic bodies can be freely stretched. It is arranged in the tip end region of the part, and is bonded and fixed with a hot melt adhesive or the like.

  In the disposable diaper of the present invention, the elastic body can be arranged at the positions of the leg opening and the waist opening. As the elastic body, it is possible to use an elastic body that is used for ordinary diapers such as natural and synthetic urethane threads, thread rubber, and flat rubber as it is, and arrange these elastic bodies in an expanded state. Then, it is bonded and fixed by a hot melt adhesive or the like.

  In the disposable diaper of the present invention, the fastening tape can use various films or non-woven sheets, and these materials are formed singly or by laminating several kinds of materials, and one end region thereof is formed. Adhering and fixing to the side flap, a hook material of a mechanical fastener is attached to the other end region. Moreover, it is preferable to have a holding part in the outer side of the part which attached the hook material.

In the used diaper of the present invention, the front sheet for engaging the fastening tape provided with the hook material has an air permeability of at least 30 to 200 cc / m ² · sec, and includes at least the first nonwoven fabric layer and the lower layer thereof. The second nonwoven fabric layer is provided with a printing portion, and the first nonwoven fabric layer is formed with a linear film portion as viewed from the surface of the first nonwoven fabric layer. In this case, the printed part of the second nonwoven fabric layer is visually recognized darker than the surrounding part in the filmed part. For this reason, the filmed part can be used as a mark for confirming the engagement position of the fastening tape, so that the fastening tape can be easily fixed at an appropriate position, and the entire diaper can be breathable. Since it becomes higher, stuffiness and fogging are prevented, giving the wearer a comfortable feeling of wear, and furthermore, since the printed part can be prevented from peeling off when wearing a diaper, the clothes and skin of the wearer can be soiled It is not useful and is useful as a disposable diaper for adult incontinence, including infants.

It is a partial notch expansion | deployment top view which shows the state which looked at the used diaper of this invention from the top sheet side. It is an expansion | deployment top view which shows the state which looked at the used diaper of this invention from the back seat | sheet side. FIG. 3 is a partially enlarged view of the front seat shown in FIG. 2. FIG. 3 is an enlarged cross-sectional view showing a state in which the front seat shown in FIG. 2 is cut along line X-X ′.

Explanation of symbols

1: Used diaper 2: Top sheet 3: Back sheet 4: Absorber 5: Cover sheet 6: Side flap 7: Solid gather 8: Fixed part 9: Free part 10: Elastic body 11: Fastening tape 12: Hook material 13: Elastic body around the waist 13 ′: Elastic body around the leg 14: Front sheet 15: Filmed portion 16: Printing portion 17: First nonwoven fabric layer 18: Second nonwoven fabric layer 19: Third nonwoven fabric layer 20: Front body 21 : Back body 22: Inseam

Claims (6)

It has a liquid-permeable top sheet, a liquid-impermeable and breathable back sheet, and an absorbent body disposed between the two sheets, and the body of one of the front body and the back body A fastening tape provided with a hook material of a mechanical fastener is arranged on both side edges, and a front seat that can be engaged with the fastening tape is arranged on the back sheet side surface of the other body. In diapers that are used,
The front sheet is composed of a laminate of a first nonwoven layer containing at least a heat-meltable fiber and a second nonwoven layer disposed thereunder, and on the surface of the second nonwoven layer in contact with the first nonwoven layer. A printing portion is provided, and the first nonwoven fabric layer is formed with at least one linear film portion that is subjected to heat melting treatment along the longitudinal direction of the diaper, The use diaper characterized in that, when viewed from the surface of the nonwoven fabric layer, the printed portion of the second nonwoven fabric layer is visually recognized darker than the surrounding portion in the filmed portion. The JIS the first nonwoven layer of the front sheet L 1906: disposable diaper according to claim 1, wherein the mass per unit area measured according to the 2000 is 10 to 30 g / m ^2. The use diaper according to claim 1 or 2, wherein the front sheet has an air permeability measured according to JIS L 1906: 2000 of 30 to 200 cc / m ² · sec.   The first nonwoven fabric layer and the second nonwoven fabric layer in the front sheet both contain heat-meltable fibers, and both layers are laminated and bonded by a heat-melt bonding process. The disposable diaper described in any one of the items.   The said front sheet | seat consists of a laminated body which has a 3rd nonwoven fabric layer further under the said 2nd nonwoven fabric layer, and each layer was joined by the hot-melt-bonding process. The disposable diaper described in item 1. The use according to any one of claims 1 to 5, wherein among the nonwoven fabrics forming the front sheet, the fineness of the nonwoven fabric forming the outermost layer (first nonwoven fabric layer) is 1 to 3 denier. Diapers.

Images