Water absorbing pad and water absorbing underpants with the same

Abstract

To provide a water absorbing pad capable of suppressing leakage from edges.SOLUTION: A water absorbing pad comprises: a water absorbing pad body comprising waterproof cloth, a water absorbing material disposed on the waterproof cloth and skin side cloth disposed on the water absorbing material; and piping obtained by piping an outer edge of the waterproof cloth and an outer edge of the skin side cloth using piping tape. The skin side cloth has water absorbing power higher than the piping tape and lower than the water absorbing material. The water absorbing material is neither sewn with nor melted and adhered to the piping tape, but sewn only with the skin side cloth in an inner area from the piping, or melted and adhered thereto. In the perspective plan view of the water absorbing pad, an outer edge of the water absorbing material is located on an inner side from an inner edge of the piping.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a water-absorbent pad and water-absorbent pants provided with the same. [Background technology]

[0002] Shorts or pants equipped with absorbent pads are used for the purpose of absorbing menstrual blood, urine, etc. Such absorbent pads are required to have high liquid retention capacity so that the moisture once absorbed does not leak out.

[0003] A plan view of a conventional absorbent pad is shown in Fig. 5, and a schematic cross-sectional view is shown in Fig. 6. As shown in Figs. 5 and 6, an absorbent pad 50 comprises an absorbent pad main body 51 having a mesh cloth 52 which is the surface that contacts the skin, an absorbent material 53, and a waterproof cloth 54 on the side that contacts the shorts, and a piping 56 formed by sandwiching the outer edge of the absorbent pad main body 51 with a piping tape 57 and sewing them together. The outer edges of the mesh cloth 52, the absorbent material 53, and the waterproof cloth 54 are sewn and fixed to the piping tape 57 to form the piping 56, and a seam 58 exists on the piping 56.

[0004] In the absorbent pad of this structure, the waterproof cloth 54 prevents moisture from leaking out from the absorbent material 53 to the outside, and the highly absorbent mesh cloth 52 and piping tape 57 prevent moisture from flowing back from the absorbent material 53 to the skin side.

[0005] In recent years, there has been an increasing demand for comfortable use of absorbent pads, and technology has been proposed to further suppress leakage of moisture (Patent Document 1). [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Registered Utility Model No. 3170247

[0007] Patent Document 1 proposes a technique for restricting moisture from seeping out from a sewn portion where the piping and the pad body are sewn together with an elastic thread. Summary of the Invention [Problem to be solved by the invention]

[0008] As a result of extensive research by the present inventors into absorbent pads, it was discovered that there is a problem in that when pressure is applied to the absorbent pad, for example by sitting on it, the absorbed liquid is likely to leak out.

[0009] The present invention has been made to solve the above problems, and has as its object to provide an absorbent pad that is less likely to leak liquid even when pressure is applied, and absorbent pants using the same. [Means for solving the problem]

[0010] In order to solve the above problems, the absorbent pad of the present invention comprises an absorbent pad main body having a waterproof cloth, an absorbent material arranged on the waterproof cloth, and a skin-side cloth arranged on the absorbent material, and piping formed by piping the outer edge of the waterproof cloth and the outer edge of the skin-side cloth using piping tape, wherein the skin-side cloth has a higher absorbency than the piping tape and a lower absorbency than the absorbent material, the absorbent material is not sewn or welded to the piping tape, and is only sewn or welded to the skin-side cloth in an area more inside than the piping, and when the absorbent pad is viewed from above, the outer edge of the absorbent material is located inside the inner edge of the piping.

[0011] Here, the piping portion is the thickest due to the number of layers of fabric, and is a place where pressure is likely to concentrate, so liquid leakage is likely to occur. However, the absorbent pad of the above configuration has an absorbent pad main body and piping, which are layered in the order of waterproof fabric, absorbent material, and skin-side fabric, but the sewing or welding to the piping tape is performed not to the entire absorbent pad main body, but only to the waterproof fabric and skin-side fabric, and the absorbent material is not sewn or welded to the piping tape. Also, the outer edge of the absorbent material is located inside the inner edge of the piping.

[0012] As a result, the piping is thinner because there is no absorbent material, so pressure is less likely to concentrate there, and there are no sewing threads or holes through which moisture can easily move between the absorbent material and the piping. This prevents liquid from leaking from the piping when pressure is applied. Furthermore, as a result of the thinner piping, stiffness and discomfort are reduced, resulting in a more comfortable fit.

[0013] In addition, the absorbent material is sewn or welded to the skin-side fabric, which prevents the absorbent material from moving to places other than the desired location, allowing the desired absorbency to be sustained. When sewn together, a route for water is created from the absorbent material to the skin-side fabric, but this part has fewer layers than the piping part, so pressure is less likely to concentrate there, and the skin-side fabric located on the surface has high absorbency, preventing liquid leakage. When welded together, there is no such route for water, so this problem does not occur. In addition, moisture absorbed by the skin-side fabric located on the surface moves quickly to the absorbent material, providing a constant, smooth feel against the skin.

[0014] The absorbency of the skin side fabric is higher than that of the piping tape and lower than that of the absorbent material. The absorbency index is the water absorption time measured by the JISL1907 drop method. The water absorption time is piping tape > skin side fabric > absorbent material, and it is more preferable that the water absorption time of the skin side fabric is 1 / 2 or less than that of the piping tape, and that the water absorption time of the absorbent material is 1 / 2 or less than that of the skin side fabric. It is also preferable that the water absorption capacity of the absorbent material is greater than that of the skin side fabric.

[0015] There is also a method of folding the waterproof fabric over the skin-side fabric without using piping tape and sewing or welding the waterproof fabric and the skin-side fabric together (using the waterproof fabric as piping as well), but the configuration of the present invention in which the piping tape is provided separately provides advantages such as excellent durability.

[0016] By using such an absorbent pad with the skin-facing fabric facing the skin and the waterproof fabric facing away from the skin, it feels pleasant against the skin and prevents moisture from seeping into shorts and the like.

[0017] The material of the skin side fabric is not particularly limited, but examples that can be used include materials made of nylon (polyamide), polyester, cotton, linen, silk, wool, Tencel, rayon, cupra, polynosic, acetate, triacetate, promix, acrylic, polyurethane, etc.

[0018] Here, the skin side fabric is preferably a fabric having a water absorption time of 12 seconds or less according to the drop method in accordance with JIS L 1907 and a drying time (100%) of 70 minutes or less according to the A1 method of ISO 17617 (hereinafter referred to as water-absorbent and quick-drying fabric). The water absorption time of the water-absorbent and quick-drying fabric is more preferably 10 seconds or less, and even more preferably 5 seconds or less. The drying time of the water-absorbent and quick-drying fabric is more preferably 60 minutes or less, and even more preferably 45 minutes or less.

[0019] Furthermore, it is preferable that the drying time (100%) of the skin side fabric according to the A1 method of ISO 17617 is shorter than the drying time of the water-absorbent material.

[0020] The water-absorbent, quick-drying fabric may be (1) a woven, nonwoven, or knitted fabric made from a fiber having water-absorbent, quick-drying properties; (2) a fabric that realizes water-absorbent, quick-drying properties through the weaving or knitting method of the fibers; or (3) a fabric that realizes water-absorbent, quick-drying properties through a combination of hydrophobic and hydrophilic materials.

[0021] Here, as the fiber having the water-absorbent and quick-drying properties described above in (1), it is preferable to use a functional fiber that has been developed as one having high water-absorbent and quick-drying properties.

[0022] As an example of the above (2) where the water-absorbing and quick-drying properties are realized by the weaving or knitting of the fibers, mesh cloth, for example, can be suitably used as a water-absorbing and quick-drying fabric because it can achieve high quick-drying properties depending on the knitting method.

[0023] The material of the mesh cloth serving as this water-absorbing and quick-drying cloth is not particularly limited, but for example, materials made of nylon, polyester, cotton, linen, silk, wool, Tencel, rayon, cupra, polynosic, acetate, triacetate, promix, acrylic, polyurethane, etc. can be used.

[0024] The method of weaving the mesh fabric as the water-absorbing and quick-drying fabric is not particularly limited, and knitted fabric, raschel, tricot, etc. can be used, and the mesh fabric may be a structure in which multiple mesh structures are layered, in which case the porosity may be the same or different. For example, the porosity may be increased from the inside to the surface.

[0025] As an example of a material that realizes water absorption and quick drying properties by combining the hydrophobic material and the hydrophilic material as described above in (3), for example, a hydrophobic material is used on the side that people touch, and a hydrophilic material is placed inside it, and moisture that comes into contact with the hydrophobic material is quickly absorbed by the hydrophilic material, thereby achieving both quick drying due to the hydrophobic material on the surface and water absorption due to the hydrophilic material. Both the hydrophobic material and the hydrophilic material can be made of known materials, and for example, the hydrophobic material can be made of fibers that do not have hydrophilic OH groups, and the hydrophilic material can be made of fibers that have many hydrophilic OH groups.

[0026] In addition, a wide variety of known absorbents can be used as the water absorbent, such as woven, knitted, or nonwoven fabrics made of fibers with excellent water absorption, water retention, and washing resistance. The material of the water absorbent is not particularly limited, and natural or synthetic fibers can be used, and it is preferable to use functional fibers that have been developed to have high water absorption and water retention.

[0027] The absorbent material may also contain functional fibers that have deodorizing, water-absorbing, quick-drying, antibacterial, deodorizing, antifungal, etc. The absorbent material may have a single layer structure or a multi-layer structure, and may be configured to include, for example, a cloth made of microfibers with excellent water absorption.

[0028] As the waterproof cloth, a wide variety of waterproof fabrics can be used, including, but not limited to, nylon, polyester, cotton, hemp, silk, wool, Tencel, rayon, cupra, polynosic, acetate, triacetate, promix, acrylic, polyurethane, and other materials, and made waterproof by polyurethane resin coating, vinyl film bonding, and the like.

[0029] Furthermore, the piping tape can be made of a wide variety of fabrics that have suitable water absorption, waterproofing, water repellency, and strength. The material is not particularly limited, but examples of the material that can be used include nylon, polyester, cotton, linen, silk, wool, Tencel, rayon, cupra, polynosic, acetate, triacetate, promix, acrylic, polyurethane, and the like.

[0030] Furthermore, the threads and needles used to sew the absorbent material and the skin-side fabric together can be any of a wide variety of known materials. There are no particular limitations on the materials, but the threads can be made of nylon, polyester, cotton, linen, silk, wool, Tencel, rayon, cupra, polynosic, acetate, triacetate, promix, acrylic, polyurethane, and other materials. It is preferable to use ball-point needles, which are less likely to damage the threads of the fabric. These threads and needles can also be used to sew the piping and to sew the absorbent pad and the absorbent pants body, which will be described later.

[0031] The method for welding the absorbent material and the skin-side fabric can be a known method for welding fabrics made of thermoplastic fibers together, such as ultrasonic sewing, high-frequency welder processing, pinsonic processing, etc. In this case, the material for the absorbent material and the skin-side fabric is synthetic or semi-synthetic fiber having thermoplastic properties, such as nylon, polyester, acetate, triacetate, promix, acrylic, polyurethane, etc. This welding method may also be used for welding the piping portion, or for welding the absorbent pad and the absorbent pants body, which will be described later.

[0032] The water absorption and quick-drying properties of these fabrics and threads can be controlled by appropriately adjusting the porosity and cross-sectional shape of the fabric itself, the thread itself, or the fibers that make up the fabric. For example, by increasing the porosity of the fibers (threads) or fabric, or adopting a cross-sectional shape that increases the surface area, water absorption can be achieved through capillary action, while at the same time increasing the mobility of moisture and improving quick-drying properties. In addition, by using a fabric with a surface shape that reduces the contact area with the skin, a smooth feel and high quick-drying properties can be achieved.

[0033] The thickness of each fabric may be appropriately determined depending on the desired water absorption capacity and size.

[0034] Furthermore, from the viewpoint of reliably preventing the formation of a route for moisture to move from the absorbent material to the outside of the piping and ensuring sufficient absorbency, when the absorbent pad is viewed from above, it is more preferable that the outer edge of the absorbent material is located 0.5 to 40 mm inward from the inner edge of the piping, more preferably 0.8 to 15 mm inward, and even more preferably 1.0 to 10 mm inward.

[0035] It is preferable for the absorbent material to be configured with a microcloth placed in contact with the skin-facing fabric side and absorbent cotton placed on the waterproof fabric side of the microcloth, as this can improve the balance between absorbency and leakage prevention.

[0036] Furthermore, if the water-absorbent material is sewn to the skin-facing fabric in a manner that makes it stick tightly to the fabric, the thickness will not increase due to the seam allowance, and there will be no adverse effect on the feel against the skin, which is preferable.

[0037] In order to solve the above problems, the present invention provides absorbent pants comprising the above-mentioned absorbent pad and an absorbent pants body with the absorbent pad attached to the crotch portion, the waterproof fabric side of the absorbent pad facing the absorbent pants body, only the piping portion of the absorbent pad being sewn or welded to the absorbent pants body, and the absorbent material being neither sewn nor welded to the absorbent pants body.

[0038] In this way, by sewing or welding the absorbent pad to the absorbent pants so that no seams or welding marks are left on the absorbent material portion, it is possible to obtain absorbent pants that can prevent leakage of liquid into the shorts. Note that it is not necessary for the entire piping portion to be sewn or welded to the main body of the absorbent pants, and only a portion of the piping portion (for example, only the left and right ends or only the top and bottom ends) may be sewn or welded to the main body of the absorbent pants. Effect of the Invention

[0039] According to the present invention, it is possible to realize a water-absorbent pad and water-absorbent pants which are comfortable to use and which are capable of preventing leakage of liquid even when a large amount of liquid is absorbed. [Brief description of the drawings]

[0040] [Figure 1] 1 is a plan view showing a water-absorbent pad according to the present invention. [Diagram 2] 1 is a schematic cross-sectional view of a water-absorbent pad according to the present invention. [Diagram 3] FIG. 2 is a plan view perspective view showing the overlap between the piping and the absorbent material of the absorbent pad. [Figure 4] FIG. 1 is a perspective view showing absorbent pants to which an absorbent pad is attached. [Diagram 5] FIG. 1 is a plan view showing a conventional water absorbent pad. [Figure 6] FIG. 1 is a schematic cross-sectional view of a conventional water absorbent pad. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0041] The present invention will be described below with reference to the drawings. Fig. 1 is a plan view showing an absorbent pad according to the present invention, Fig. 2 is a schematic cross-sectional view of the absorbent pad according to the present invention, and Fig. 3 is a plan perspective view showing the overlap of the piping and the absorbent material of the absorbent pad.

[0042] As shown in Figures 1 and 2, the absorbent pad 100 of the present invention comprises an absorbent pad main body 10 having a skin-side cloth 11 which is the surface that contacts the skin, an absorbent material 12 having a two-layer structure of micro cloth 13 and absorbent cotton 14, a waterproof cloth 15 on the underwear side, and a piping 20 in which the outer edge of the waterproof cloth 15 and the outer edge of the skin-side cloth 11 are sandwiched and sewn together with a piping tape 21. As shown in Figure 2, the piping tape 21 is sewn to the skin-side cloth 11 and the waterproof cloth 15 to form the piping 20 with a seam 32. The absorbent material 12 is not sewn to the piping 20 (the seam 32 does not overlap with the absorbent material 12), but is sewn only to the skin-side cloth 11 in an area inside the piping 20 to form a seam 31.

[0043] Here, the piping portion is the thickest with the greatest number of layers of fabric, and is a place where pressure is likely to concentrate, so liquid leakage is likely to occur. With the above-mentioned configuration, the water-absorbent material 12 is not sewn to the piping tape 21, so there are no sewing threads or holes that would allow moisture to move from the water-absorbent material 12 to the outside of the piping 20. Also, since no water-absorbent material is present in the piping 20 portion, the number of layers of fabric is reduced, and the pressure applied to the piping 20 portion is also reduced. These features prevent liquid leakage from the piping portion.

[0044] In addition, since the absorbent material 12 is sewn to the skin side cloth 11 in a slapped manner, the absorbent material 12 is prevented from moving to places other than the desired place, and the desired water absorption can be continuously exerted. This stitching also creates a route for water from the absorbent material 12 to the skin side cloth 11, but since the skin side cloth 11 has high water absorption and pressure is unlikely to concentrate on this part, early liquid leakage is prevented. In addition, since the absorbent material 12 and the waterproof cloth 15 are not sewn together, there is no liquid leakage from the absorbent material 12 to the waterproof cloth 15 side.

[0045] The skin side fabric 11 may be a mesh fabric made of fibers that are widely used for clothing. Alternatively, a woven fabric made of fibers with water-absorbent and quick-drying properties may be used, or a water-absorbent and quick-drying fabric in which a hydrophobic material is used on the skin side and a hydrophilic material is used on the inner side may be used.

[0046] In addition, the skin side fabric 11 and the absorbent material 12 may be made of synthetic or semi-synthetic fibers, and instead of being sewn together by slapping, they may be welded together using a known method for welding fabrics made of thermoplastic fibers (for example, ultrasonic sewing, high-frequency welder processing, pinsonic processing, etc.).

[0047] Here, the width L1 of the piping 20 shown in FIG. 3 is preferably 1 to 20 mm, more preferably 3 to 10 mm, and further preferably 4 to 6 mm.

[0048] The distance L2 between the inner edge of the piping 20 and the outer edge of the water absorbent material 12 is preferably 0.5 to 40 mm, more preferably 0.8 to 15 mm, and even more preferably 1.0 to 10 mm.

[0049] The distance L3 between the outer edge of the water absorbent material 12 and the seam 31 (or the welded line in the case of welding) is preferably 0.6 to 20 mm, more preferably 0.8 to 5 mm, and even more preferably 1 to 3 mm.

[0050] Fig. 4 is a perspective view showing absorbent pants to which an absorbent pad is attached. As shown in Fig. 4, the absorbent pad 100 is attached to the crotch portion of the absorbent pants body 200 to obtain absorbent pants 300. At this time, the waterproof fabric 15 side of the absorbent pad 100 faces the absorbent pants body 200, and only the piping 20 of the absorbent pad 100 is sewn to the absorbent pants body 200, with the absorbent material 12 not being sewn to the absorbent pants body 200, thereby preventing liquid leakage to the absorbent pants body 200. The absorbent pad 100 and the absorbent pants body 200 may be welded together instead of being sewn together.

[0051] Example 1 The absorbent pad of this embodiment, having a maximum length of 235 mm and a maximum width of 200 mm, was made using a skin side cloth 11 made of polyester mesh cloth, a micro cloth 13 made of polyester and nylon, an absorbent padding 14 made of Toyobo's Lanseal, a waterproof cloth 15 made of polyurethane-coated polyester, a piping tape 21 made of nylon and polyurethane, and polyester thread, and a ball point needle.

[0052] At this time, first the skin side cloth 11, the micro cloth 13 and the water-absorbent wadding 14 were layered, sewn together by beating from the water-absorbent wadding 14 side, and then the waterproof cloth 15 was layered to form the water-absorbent pad main body 10. After this, the outer edge of the skin side cloth 11 and the outer edge of the waterproof cloth 15 were piped using piping tape 21 to complete the water-absorbent pad 100 in which the water-absorbent material 12 (micro cloth 13 and water-absorbent wadding 14) was not sewn to the piping tape 21.

[0053] The width L1 of the piping 20 was 6 mm, the distance L2 between the inner edge of the piping 20 and the outer edge of the water absorbent material 12 was 1 mm, and the distance L3 between the outer edge of the water absorbent material 12 and the seam 31 was 2 mm (see FIG. 3).

[0054] Comparative Example 1 The absorbent pad of Comparative Example 1 was produced in the same manner as Example 1 above, except that the size of the absorbent cotton and microcloth was the same as the size of the skin side fabric (as shown in Figure 6, an absorbent material 53 consisting of absorbent cotton and microcloth was sewn to piping tape 57).

[0055] (Water absorption test) The absorbency of the absorbent pad was tested under the following conditions. (1) Drop 5 mL of artificial urine (21 g of urea dissolved in 1 L of 0.9% saline) onto the center of the absorbent pad and leave it for 1 minute. (2) Place an acrylic plate and a weight on the drop section, and set the weight at 50 g / cm 2 Apply a load of 100 and leave it for 1 minute. (3) Visually check for leaks. (4) If no leakage is found, return to step (1) and repeat the procedure for the absorbent pad in this state. If leakage is found, the amount of liquid at that point shall be the test result.

[0056] As a result, leakage was confirmed when the amount of dripped liquid was 40 mL in Example 1 and 30 mL in Comparative Example 1. From these results, it was found that according to the present invention, even if the amount of water absorbent material used is small, the amount of water absorption at the point where leakage occurs can be increased, and high leakage resistance can be obtained.

[0057] The reason for this is believed to be as follows: The number of laminated sheets in the piping portion is greater in Comparative Example 1 due to the presence of the water-absorbent material 12, and the thickness of the piping portion is greater, so pressure is more likely to concentrate. Also, in Comparative Example 1, there are paths through which moisture can move, such as the sewing thread and stitching holes that connect the water-absorbent material to the outside of the piping, but in Example 1, there are no such paths for moisture movement. It is believed that for these reasons, even though the amount of water-absorbent material used in the Example was less, liquid leakage when pressurized was less likely to occur.

[0058] The embodiments disclosed herein should be considered to be illustrative and not restrictive in all respects. The scope of the present invention is defined by the claims, not the above description, and is intended to include all modifications within the meaning and scope of the claims. [Industrial Applicability]

[0059] INDUSTRIAL APPLICABILITY The present invention provides an absorbent pad and absorbent pants which are capable of effectively preventing leakage of liquid when pressure is applied, and has great industrial applicability. [Explanation of symbols]

[0060] 100 Absorbent Pad 10 Absorbent pad body 11 Skin side cloth 12 Water absorbing material 13 Micro Cross 14 Absorbent cotton 15 Waterproof cloth 20 Piping 21 Piping Tape 31 Stitches 32 Stitches 50 Absorbent Pad 51 Absorbent pad body 52 Mesh Cloth 53 Water absorbing material 54 Waterproof cloth 56 Piping 57 Piping Tape 58 Stitches 200 Absorbent pants body 300 Water Absorbing Pants

Claims

1. A water-absorbent pad body including a waterproof cloth, a water-absorbent material disposed on the waterproof cloth, and a skin-side cloth disposed on the water-absorbent material; and a piping formed by piping an outer edge of the waterproof fabric and an outer edge of the skin side fabric using a piping tape, the skin side fabric has a higher water absorption capacity than the piping tape and a lower water absorption capacity than the water absorbent material; the water-absorbent material is neither sewn nor welded to the piping tape, and is only sewn or welded to the skin side fabric in an area inside the piping; When the absorbent pad is seen through a plan view, an outer edge of the absorbent material is located inside an inner edge of the piping.

2. The body side fabric has a water absorption time of 12 seconds or less according to the JIS L 1907 drop method, and a drying time (100%) of 70 minutes or less according to the ISO 17617 A1 method.

2. The absorbent pad according to claim 1.

3. When the absorbent pad is viewed from above, the outer edge of the absorbent material is located 0.5 to 40 mm inside the inner edge of the piping.

2. The absorbent pad according to claim 1.

4. The water-absorbent material includes a micro cloth arranged in contact with the skin-side fabric, The water-absorbing padding is disposed on the waterproof cloth side of the micro cloth.

2. The absorbent pad according to claim 1.

5. The water-absorbent material is sewn onto the fabric by tapping from the water-absorbent material side.

2. The absorbent pad according to claim 1.

6. The skin side fabric is a mesh fabric.

6. The water-absorbent pad according to claim 1,

7. The skin side fabric is a nonwoven fabric.

6. The water-absorbent pad according to claim 1,

8. A water absorbent pad according to any one of claims 1 to 5; and a water-absorbent pants body having the water-absorbent pad attached to the crotch portion, The water absorbent pad is attached so that the waterproof fabric side faces the water absorbent pants body side, In the absorbent pants, only the piping of the absorbent pad is sewn or welded to the main body of the absorbent pants, and the absorbent material is not sewn or welded to the main body of the absorbent pants.

Images