JP2005185518A - Shorts cover - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shorts cover which gives an excellent feeling, is easy to fix, does not slip off easily while it is worn, and does not give much unpleasantness to a wearer. <P>SOLUTION: The shorts cover includes an elastic laminated sheet 10 which is an integrated laminate of the surface fibrous layer, the flexible fibrous layer including a heat-shrunk potentially crimping fiber or an elastic fiber, and the leak proof layer in this sequence, and fixing means 6A and 6A which are disposed on a surface of a leak proof layer side at both side sections 11 and 11 located at both sides of a central section of the laminated sheet 10, and is used by placing the central section 12 at a touching skin surface side of a crotch section of the shorts and folding and fixing both the side sections 11 and 11 to the side of a non-touching skin surface of the crotch section along both the edge sections of the crotch section. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a shorts cover used by being fixed to a crotch portion of a shorts in order to prevent the shorts from being soiled or wet due to excrement, secretions, sweat, or the like.

Sanitary napkins, panty liners, and the like are used for the treatment of female menstrual blood and vaginal discharge. Conventional sanitary napkins and panty liners with wings are also known, and sanitary napkins with wings are used with the wings fixed to the outer surface of the crotch portion.
For example, Patent Document 1 describes an absorbent article such as a sanitary napkin or a panty liner, which includes a multilayer stretchable wing.

Japanese translation of PCT publication No. 2002-508893

  However, most conventional absorbent articles with wings have a structure in which the wings are extended from both sides of the highly rigid absorbent body, and the presence of the highly rigid absorbent body makes the wearer feel hard. There is a risk of giving, shifting the position of the absorbent article, or unfastening the wing during wearing. Moreover, by fixing the absorbent article, the stretchability of the shorts is hindered, and fixing to the shorts may not always be easy, or may give an uncomfortable feeling during wearing.

Accordingly, an object of the present invention is to provide a shorts cover that has a good touch, is easy to be fixed, is not easily displaced during wearing, and does not cause the wearer to feel uncomfortable.
In the present invention, the shorts are general underwear pants, sanitary shorts, disposable shorts, girdles, etc., and include those in which the crotch part (or crotch part) has a double structure. Moreover, it is not restricted to female use.

  The present invention comprises a laminate sheet having stretchability, in which a surface fiber layer, a stretchable fiber layer, and a leak-proof layer are laminated and integrated in this order, and the both sides located on both sides of the center portion. Fixing means provided on the surface of the leak-proof layer side of the laminated sheet, the central portion is positioned on the skin contact surface side of the crotch portion of the shorts, and the both side portions of the crotch portion The object is achieved by providing a shorts cover that is used by being bent and fixed to the non-skin contact surface side of the crotch portion along both side edges. The skin contact surface is a surface directed toward the wearer's skin side.

  According to the shorts cover of the present invention, it is possible to prevent the shorts from being soiled or wetted by excrement, secretions, sweat, or the like. The shorts cover of the present invention has a good touch, is easily fixed, is not easily displaced during wearing, and does not give the wearer an uncomfortable feeling.

The present invention will be described below based on preferred embodiments with reference to the drawings.
FIG. 1 shows a shorts cover 1 as an embodiment of the absorbent article of the present invention.
As shown in FIGS. 1 and 2, the shorts cover 1 in the present embodiment is mainly composed of a single laminated sheet 10 having stretchability. As shown in FIG. 2, the laminated sheet 10 is formed by laminating the surface fiber layer 2, the stretchable fiber layer 3, and the leak-proof layer 4 in this order.

  The surface fiber layer 2 covers the stretchable fiber layer 3, and by covering the stretchable fiber layer 3, fuzz derived from the constituent fibers of the stretchable fiber layer 3 occurs on the surface that touches the skin of the wearer. In addition, even when a material having a poor touch is used for the stretchable fiber layer 3, it is possible to prevent the surface having a poor touch from being exposed to the surface.

As the material for forming the surface fiber layer 2 (a material before being joined to another member), a nonwoven fabric composed of short fibers and / or long fibers is preferably used.
The nonwoven fabric used as the material for forming the surface fiber layer 2 is composed of a nonwoven fabric made of short fibers manufactured by the thermal bond method, a nonwoven fabric made of short fibers manufactured by the spunlace method, and a long fiber manufactured by the spunbond method from the viewpoint of touch. Nonwoven fabrics are preferred. Here, the short fiber means a fiber having a length of 150 mm or less, and the long fiber means a fiber having a length exceeding 150 mm (including continuous fibers), but in the case of a non-woven fabric made using a card machine, Fibers that can be made with a card machine are called short fibers.

As the fiber constituting the surface fiber layer 2, any of natural fiber, regenerated fiber, and synthetic fiber can be used. From the viewpoint of liquid retention, it is preferably a hydrophilic fiber, and the fiber itself is hydrophilic. Fibers treated so that the surface of synthetic fibers made of a resin such as polyethylene, polypropylene, polyester, etc., alone or in combination are made hydrophilic, especially cotton fibers, rayon fibers, cupra fibers, water-absorbing polymer fibers, etc. The fibers are preferred.
Further, from the viewpoint of heat-sealing with the stretchable fiber layer, heat-sealable fibers are preferable, and polyethylene, polyester, polypropylene, and composite fibers thereof are particularly preferable.
From the viewpoint of liquid retention and heat-fusibility, fibers treated so that the surface of the synthetic fiber becomes hydrophilic are particularly preferable.
In addition, it is preferable from a viewpoint of the touch that the average fiber diameter of a constituent fiber is 1-5 dtex, especially 1-3 dtex.

From the viewpoint of liquid retention, it is preferable that 5 to 100 mass%, particularly 70 to 100 mass% of the fibers constituting the surface fiber layer 2 are hydrophilic fibers.
Moreover, from a viewpoint of adhesiveness with a stretchable fiber layer, it is preferable that 30-100 mass% of the fiber which comprises the surface fiber layer 2, especially 70-100 mass% is a heat-fusible fiber.

  The stretchable fiber layer 3 is a fiber layer containing stretchable fibers, and is a layer that imparts elastic stretchability to the shorts cover 1. Examples of stretchable fibers include latent crimped fibers or elastic fibers that have developed a three-dimensional crimp by heat shrinkage. The stretchable fiber layer 3 in the present embodiment includes latent crimpable fibers that have developed a three-dimensional crimp by heat shrinkage as stretchable fibers.

The latent crimpable fiber is a fiber that can be handled in the same manner as a conventional nonwoven fabric fiber before being heated, and has a property that a helical crimp is developed and contracted by heating at a predetermined temperature. is there. When the latent crimpable fiber is used, it is possible to realize both heat shrinkage during production of the laminated sheet and imparting stretchability to the laminated sheet.
The latent crimpable fiber includes, for example, an eccentric core-sheath type composite fiber or a side-by-side type composite fiber containing two types of thermoplastic polymer materials having different shrinkage rates as components. Examples thereof include those described in JP-A-9-296325 and Japanese Patent No. 2759331. Examples of two thermoplastic polymer materials having different shrinkage rates include, for example, a combination of ethylene-propylene random copolymer (EP) and polypropylene (PP), polyethylene terephthalate (PET), polyethylene terephthalate and polyethylene isophthalate. And a combination with a copolymer (CoPET).

  Examples of the form of the stretchable fiber layer 3 forming material (the material before being joined to another member) include a web in which the constituent fibers are not joined, or a nonwoven fabric. Examples of the web include a web containing latent crimpable fibers and formed by a card method. As a nonwoven fabric containing a latent crimpable fiber, the nonwoven fabric manufactured by various manufacturing methods is mentioned. Examples of the nonwoven fabric production method include a heat fusion method, a hydroentanglement method, a needle punch method, a spun bond method, and a melt blown method.

The leak-proof layer 4 is a layer that prevents the liquid absorbed and held in the stretchable fiber layer 3 (and the surface fiber layer 2) from moving to shorts.
As the material for forming the leak-proof layer 4 (the material before joining to other members), materials conventionally used for sanitary napkins, panty liners, etc. can be used, such as polyethylene, polypropylene, polyvinyl acetate, polyester, etc. A non-woven fabric having water repellency or water resistance such as a thermoplastic resin film, a spunbond nonwoven fabric, a spunbond-meltblown-spunbond multilayered nonwoven fabric, or a composite sheet of these can be used. Here, having water resistance indicates a state in which liquid starts to leak from the leak-proof layer and does not stain the shorts. When an elastomer resin such as urethane is used as the material for the resin film or nonwoven fabric, it is preferable in terms of imparting stretchability to the leak-proof layer.

  The material for forming the leak-proof layer 4 is particularly preferably a nonwoven fabric from the viewpoint of flexibility and followability to body movement.

  The laminated sheet 10 in the present invention can be manufactured by laminating and bonding the surface fiber layer 2 forming material, the stretchable fiber layer 3 forming material, and the leak-proof layer 4 forming material in the following order, for example. . In the following description, for convenience, the surface fiber layer 2 forming material is referred to as a first layer, the stretchable fiber layer 3 forming material is referred to as a second layer, and the leakage preventing layer 4 forming material is referred to as a third layer.

(1) Heat containing a stretchable nonwoven fabric composed of short fibers and / or long fibers in the first layer, and latent crimpable fibers (fibers that develop three-dimensional crimps by heat treatment) in the second layer A method suitable when a stretchable film is used for the shrinkable nonwoven fabric and the third layer.
(Method A) The second layer is subjected to heat treatment to cause heat shrinkage. And a 1st layer is laminated | stacked on the 2nd layer of a shrinkage | contraction state, These are partially heat-seal | fused and integrated by heat embossing or ultrasonic embossing. And a 3rd layer is adhere | attached on the 2nd layer side of the laminated body with adhesives, such as a hot-melt-type adhesive.
(Method B) The first layer and the second layer are laminated, and these are partially joined and integrated by heat embossing or ultrasonic embossing. Then, the laminate is subjected to heat treatment, and the entire laminate is contracted by the contraction force of the second layer. Then, the third layer is bonded to the second layer side of the laminate with an adhesive such as a hot melt adhesive.

(2) Non-woven fabric composed of short fibers and / or long fibers in the first layer, heat-shrinkable non-woven fabric containing latent crimpable fibers in the second layer, waterproof non-woven fabric (spunbond non-woven fabric, third layer) This method is suitable when using meltblown nonwoven fabrics.
(Method C) A 1st layer, a 2nd layer, and a 3rd layer are laminated | stacked, and these are partially joined and integrated by heat embossing or ultrasonic embossing. Then, the laminated body is subjected to heat treatment, and the whole laminated body is contracted by the contraction force of the second layer.
(Method D) The second layer is subjected to heat treatment to cause heat shrinkage. Then, the first layer and the third layer are laminated on the second layer in the contracted state, and heat embossing or ultrasonic embossing is integrally performed on them, and these are partially (partially in plan view, the joint portion is 3 Over the layers) and fused together.

(3) Suitable for the case where a nonwoven fabric composed of short fibers and / or long fibers is used for the first layer, a heat-shrinkable web containing latent crimpable fibers is used for the second layer, and a waterproof nonwoven fabric is used for the third layer. Method.
(Method E) The second layer is superposed on the third layer and hydroentangled to obtain a spunlace nonwoven fabric in which these are integrated. Then, the first layer is joined to the spunlace nonwoven fabric with an adhesive such as a hot-melt adhesive, and heat treatment is applied thereto, and the entire sheet is contracted by the contraction force of the second layer.
(Method F) The spunlace nonwoven fabric obtained in the same manner as in Method E is subjected to heat treatment, and the spunlace nonwoven fabric is shrunk by the shrinkage force of the second layer. Join with an adhesive such as an adhesive.
The adhesion of the first layer in the methods A and B and the adhesion of the third layer in the methods E and F may be whole surface adhesion or partial adhesion. Examples of the adhesive coating pattern in the case of partial adhesion include a dot pattern, a stripe pattern (striped pattern), a lattice pattern, and a checkered pattern.

  The laminated sheet 10 shown in FIGS. 1 to 3 is manufactured by the method C described above. As shown in FIG. 2, the surface fiber layer 2, the stretchable fiber layer 3, and the leak-proof layer 4 are partially heated. It is integrated by fusion. And the uneven | corrugated shape which makes each heat-fusion part 5 formed in the dispersed state the recessed part and makes the other part the convex part 21 is formed in the surface at the surface fiber layer 2 side of the lamination sheet 10. FIG. Due to the presence of the uneven shape, the shorts cover 1 of the present embodiment has a small contact area with the skin, and can maintain a smooth touch even when worn for a long time.

As shown in FIG. 1, the shorts cover 1 has a center portion 12 and both side portions 11 and 11 located on both sides of the center portion 12, and the leakage prevention of the laminated sheet 10 on the both side portions 11 and 11. Fixing means 6A and 6A are provided on the surface on the layer 4 side.
The fixing means 6A is for fixing both side portions 11, 11 bent along both side edges of the crotch portion 7 of the shorts to the outer surface Q side of the crotch portion. It is preferable that it is provided over a length of 50 to 100%, particularly 70 to 100%, from the viewpoint of difficulty in detachment and difficulty in slipping.

  Here, the longitudinal direction of the shorts cover 1 is the direction when the direction matching the front-rear direction of the shorts is clear, and is the direction when the direction matching the front-rear direction of the shorts is not clear. The total length in the direction in which the length measured along a straight line parallel to the surface of 1 and passing through the center point C of the surface of the shorts cover is the longest.

  In the present embodiment, as the fixing means 6A, an adhesive is applied to the laminated sheet 10 to form an adhesive part. Providing an adhesive part as the fixing means 6A is preferable from the viewpoint of integrating the shorts and the sheet and preventing the side of the shorts from being soiled.

Examples of the adhesive for forming the adhesive part include hot melt adhesives such as styrene-isoprene-styrene block copolymer (SEBS), styrene-butadiene-styrene block copolymer (SBS), styrene-ethylene-propylene- Ethylene copolymer (SEPS) or the like is preferably used.
The pressure-sensitive adhesive coating method may be solid coating or pattern coating. Examples of pattern coating patterns include dot patterns, stripe patterns (striped patterns), lattice patterns, checkered patterns, and the like.

  The shorts cover 1 of the present embodiment has a substantially circular shape, and has a shape in which concavely curved portions 13 are formed on both opposite side edges of the circle. The shorts cover 1 has a shape surrounded by a curve.

In the shorts cover 1 of the present embodiment, the longest of the lengths measured along a straight line (an example is shown as CL) that is parallel to the surface of the shorts cover 1 and passes through the center point C of the surface of the shorts cover 1. The ratio (L1 / L2) between the length L1 and the shortest length L2 is 0.5 to 1, more specifically 0.7 to 0.9. Such a shape is significantly different from conventional sanitary napkins and panty liners with wings.
Since the shorts cover 1 of this embodiment has such a shape, when the side surface portion is fixed so as to be wound around both side edge portions of the crotch portion, both side edge portions of the crotch portion can be covered over a particularly wide range. It is particularly excellent in the effect of preventing shorts from being contaminated by menstrual blood.

  The shorts cover 1 of the present embodiment has a longitudinal direction and a width direction, and the both side portions 11 and 11 are both side portions in the longitudinal direction. The fixing means 6A is formed in a belt shape having a predetermined width, and is formed so as to extend in the longitudinal direction on both side portions thereof.

  As shown in FIG. 3, the shorts cover 1 of the present embodiment has a central portion 12 positioned on the inner surface P (skin contact surface side) of the crotch portion 7 of the shorts, and both side portions 11, 11 thereof are crotch. It is used by being bent and fixed to the outer surface side Q (non-skin contact surface side) of the crotch portion 7 along both side edges of the portion 7.

  According to the shorts cover 1 of the present embodiment, the flexible laminated sheet 10 having elasticity as a whole is mainly configured, and the elastic fiber layer 3 is not exposed on the surface. Even when materials that are prone to fluff or materials that are soft to the touch are used for the material, they are comfortable to touch, and due to their excellent stretchability, the fit to the crotch part of the shorts is good and the fixing to the crotch part is easy. In addition, it is difficult for displacement to occur during wearing, and it is difficult for the wearer to feel uncomfortable during wearing. Further, since it has a simple structure as described above, it can be manufactured at a low cost with relatively simple equipment.

As shown in FIG. 1, the shorts cover 1 of the present embodiment has a concavely curved portion 13 at each of the side portions 11 fixed to the outer surface side Q of the crotch portion. Therefore, it is difficult to cause inconveniences such that the folded side portions 11 overlap each other or the folded portions are too many to inhibit the stretchability of the shorts. Moreover, since the fitting property with respect to the crotch portion of the shorts is improved, the mounting property is also improved.
From the viewpoint of ensuring such an effect, the radius of curvature of the concavely curved portion 13 is preferably 2 to 20 cm, particularly 3 to 8 cm.

In addition, each of the concavely curved portions 13 has a wide portion before and after the closest portion, but the width L3 of the wide portion is equal to the width L2 of the closest portion between the concavely curved portions 13 respectively. On the other hand, it is preferably about 10 to 30% longer.
In addition, in the shorts cover 1 of this embodiment, the center part 12 has the fixing means 6B similar to the fixing means 6A. The fixing means 6A and the fixing means 6B may be continuous without a boundary. Moreover, the shorts cover 1 of this embodiment does not contain the superabsorbent polymer used for the conventional sanitary napkin or panty liner. However, the shorts cover of the present invention may contain a superabsorbent polymer. For example, particles and fibers of a superabsorbent polymer are arranged on the stretchable fiber layer in the center of the shorts cover to improve the absorbency. Also good.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

  For example, the stretchable fiber layer 3 may include elastic fibers instead of the heat-shrinkable latent crimpable fibers. The stretchable laminated sheet having a stretchable fiber layer containing elastic fibers is obtained by, for example, using a stretchable fiber layer forming material in an unstretched state containing elastic fibers in place of the heat-shrinked second layer in the method A described above. The first layer and the third layer can be laminated on a stretchable stretchable fiber layer forming material (second layer) containing elastic fibers, and then heat-sealed. Can be manufactured by a method of releasing the stretched state of the second layer after being integrated.

  As the elastic fiber, an elastomer resin such as urethane, EVA (ethyl vinyl acetate), and styrene can be used. The elastic fiber content in the stretchable fiber layer is preferably 30 to 100% by mass, particularly 70 to 100% by mass.

  Moreover, the male member of a mechanical hook-and-loop fastener can also be provided as 6 A of fixing means and / or 6B. The male member of the mechanical surface fastener is a sheet-like base material provided with a protrusion that mechanically engages with a nonwoven member rich in engagement and a female member (loop material) of the mechanical surface fastener, As the shape of the protrusion, there are a bowl shape, a mushroom shape, a bowl shape, and the like. Various known members can be used as the male member of such a mechanical surface fastener. When the male member of a mechanical surface fastener is used as a fixing means, the outer surface side of the crotch portion of the shorts is made of a material having a high engagement property (nonwoven fabric, net cloth formed with a loop, etc.) It is preferable to arrange a female member of a mechanical surface fastener on the outer surface.

  The shape of the shorts cover in plan view may be a circle, an ellipse, a square with rounded corners, a rectangle, or the like.

  In addition, the shorts cover of this invention may be used independently, and may be used together with absorbent articles, such as a tampon, an insertion device in a labia, and a panty liner.

1A and 1B are diagrams showing a shorts cover as an embodiment of the present invention. FIG. 1A is a diagram showing a surface on the surface fiber layer side, and FIG. 1B is a diagram showing a surface on the leak-proof layer side. FIG. 2 is a schematic cross-sectional view taken along the line XX of FIG. FIG. 3 is a perspective view showing a use state (state fixed to a crotch portion of the shorts) of the shorts cover shown in FIG. 1.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Shorts cover 2 Surface fiber layer 3 Stretchable fiber layer 4 Leak-proof layer 5 Thermal fusion part 6A Fixing means 10 Stretched laminated sheet 11 Both side parts 12 Center part

Claims (5)

The surface fiber layer, the stretchable fiber layer, and the leak-proof layer are laminated and integrated in this order, the stretchable laminate sheet, and the laminate sheet on both sides located on both sides of the central portion Fixing means provided on the surface of the leak-proof layer side,
The central portion is positioned on the skin contact surface side of the crotch portion of shorts, and the both side portions are bent and fixed to the non-skin contact surface side of the crotch portion along both side edges of the crotch portion. Shorts cover. The shorts cover according to claim 1, wherein each edge of each of the both side portions has a concavely curved portion. The shorts cover according to claim 2, wherein a radius of curvature of the concavely curved portion is 2 to 20 cm. The ratio (L1 / L2) of the longest length L1 and the shortest length L2 among the lengths measured along a straight line parallel to the surface of the shorts cover and passing through the center point of the surface of the shorts cover is 0. The shorts cover according to any one of claims 1 to 3, which is 5-1. The surface fiber layer and the stretchable fiber layer are integrated by partial heat fusion, and the heat fusion part is a recess on the surface fiber layer side surface, and the gap between the recesses is a protrusion. The shorts cover according to any one of claims 1 to 4, wherein an uneven shape is formed.

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