JP2005009026A - Brassiere pad - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a brassiere pad excellent in water absorbability, having slight reverse-leakage feeling when worn, and excellent in reusability. <P>SOLUTION: The brassiere pad is a pad comprising fibrous fabrics and having a fabric water permeable layer and an absorbed water retaining layer as constitutional materials. The brassiere is made of synthetic fibers where the water permeable layer has a water-penetrating speed of ≤5 sec, an average fineness of a primary fiber comprising the water permeable layer is thicker than that of a primary fiber comprising the absorbed water retaining layer, and the average fineness of the primary fiber comprising the absorbed water retaining layer is 0.01-2 dtex. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to brassiere pads. More specifically, the present invention can be applied to pads such as brass pads, breast milk pads, and clothing such as shoulder pads, and more particularly to pads that require water absorption performance such as breast milk pads.
[0002]
[Prior art]
Conventionally, the material of brass pad has been mainly made of cotton, cotton / polyester blends, piles such as towels, and fabrics such as urethane. However, the conventional ones cause stuffiness and rashes and have a feeling of discomfort because moisture remains on the side that hits the skin due to low water absorption and water retention. In other words, if the water absorption is low, if moisture is generated, such as breastfeeding or sweating, the pad material will not absorb the moisture, leaving moisture on the skin side, which may cause stuffiness or irritation and may cause discomfort. Or In addition, if the water retention is low, it may cause stains on the underwear or clothes from the skin side, causing “stains”, and frequent replacement of the pads, making it difficult to use. Furthermore, due to weight pressure or the like, the absorbed water may ooze out from the pad material, and by preventing this, a pad material with excellent usability can be obtained.
[0003]
In order to solve such a problem, a pad material having comfortable water absorption performance has been proposed (Patent Document 1).
[0004]
However, the water-absorbing sheet described in Patent Document 1 has a raised fiber pressed against the surface of the water-permeable surface layer sheet by raising the weight of the fiber by the weight of the user, so that the liquid is We expect that it will penetrate the fabric surface and be absorbed quickly by the intermediate sheet, which is a water-absorbing layer. However, liquids such as urine will hardly be absorbed and diffuse on the brushed surface in areas where weight is not applied. For this reason, it is easy to be absorbed by a comforter or the like in the meantime, and the wet feeling is transmitted from the dirty comforter so that the patient's discomfort is not reduced.
[0005]
Moreover, the brassiere cup base material which has a comfortable wearing feeling is proposed (patent document 2).
[0006]
However, the brassiere cup base material described in Patent Document 2 is formed by needle punching the laminated web and containing an elastic water-dispersed emulsion polymer in the intermediate layer, and has good shape stability and air permeability during washing. However, when water absorption performance is required like a breast milk pad, the current situation is that it does not absorb liquid such as leaked breast milk and does not reduce discomfort.
[0007]
In addition, it is important that brassiere pads provide a comfortable feeling to use, and a material such as disposable paper is not preferable because a bulky sound is generated or an unpleasant feeling is felt when lying on the material. Furthermore, if an acrylic polymer absorber is used as a water-absorbing agent, problems remain in disposal after use.
[0008]
[Patent Document 1] Japanese Patent Laid-Open No. 2001-204609
[0009]
[Patent Document 2] Japanese Patent Application Laid-Open No. 2001-181906
[0010]
[Problems to be solved by the invention]
The present invention solves these conventional problems, and provides novel brass pads that are excellent in moisture absorption, have little back-leak during use, can be used comfortably, and are reusable by washing. It is something to be done.
[0011]
[Means for Solving the Problems]
The present invention employs the following means in order to solve such problems. That is, pads having a fabric-like water-permeable layer and a water-absorbing water-retaining layer made of fibers as constituent materials, the water-absorbing speed of the water-permeable layer is 5 seconds or less, and the average fineness of the main fibers constituting the water-permeable layer is Bra pads that are thicker than the average fineness of the main fibers constituting the water-absorbing water-retaining layer, and the main fibers constituting the water-absorbing water-retaining layer are synthetic fibers having an average fineness of 0.01 to 2 dtex. .
[0012]
DETAILED DESCRIPTION OF THE INVENTION
The brassiere pads used in the present invention are brassiere pads having a fabric-like water-permeable layer made of fibers and a water-absorbing water-retaining layer as constituent materials, and the water-absorbing speed of the water-permeable layer is 5 seconds or less. And the average fineness of the main fiber which comprises this water-permeable layer is thicker than the average fineness of the main fiber which comprises this water absorption water retention layer, and the main fiber which comprises this water absorption water retention layer has an average fineness of 0.01-2 dtex It is important that it is a synthetic fiber.
[0013]
In the present invention, the “fabric shape” of the “fabric-like water-permeable layer and water-absorbing water-retaining layer” refers to a sheet shape such as a nonwoven fabric, a woven fabric, and a knitted fabric. Any device that exhibits these forms can be used.
[0014]
Among these, a non-woven fabric is preferable as the water-absorbing water-retaining layer because the thickness, the amount of voids and the like can be changed as appropriate, and the cost is advantageous.
[0015]
The technical idea of the brass pads of the present invention is that when liquid such as sweat or breast milk leaks to the surface of the brass pad pad, it quickly absorbs the liquid and holds the absorbed liquid. For this purpose, the water-permeable layer of the present invention needs to have a water absorption speed of 5 seconds or less. If the water absorption rate exceeds 5 seconds, the water absorption is too slow for practical use, so there is a large amount of water on the brassiere pad, which may cause moisture to remain on the skin side, causing stuffiness, rash, etc. It becomes difficult to use it. Preferably, it is 2 seconds or less, and when a liquid such as a body fluid bleeds out, the user can make the skin side dry and can greatly reduce discomfort.
[0016]
Moreover, the average fineness of the main fiber which comprises the water-permeable layer of this invention needs to be thicker than the average fineness of the main fiber which comprises a water absorption water retention layer. By making it thicker than the average fineness of the main fibers that make up the water-absorbing water-retaining layer, the water-permeable layer quickly moves the adhering water to the water-absorbing water-retaining layer, and the water that reaches the surface of the water-absorbing water-retaining layer absorbs and retains water in the water-absorbing water-retaining layer. And it will have the function to spread | diffuse to circumference | surroundings quickly within a water absorption retention layer. In other words, the water-permeable layer and the water-absorbing water-retaining layer are composed of fibers and voids, but by providing a gradient in the thickness of the fibers that are formed from the surface layer toward the inside, it is easy to move moisture using capillary action. it is conceivable that.
[0017]
The main fibers constituting the water-absorbing water retention layer need to have an average fineness of 0.01 to 2 dtex. This is because, in order to improve the water absorption performance and the water retention performance, if the fineness of the single fiber is reduced to increase the number of constituents, it is necessary to increase the surface area of the fiber and reduce the space generated between the fibers. However, if it is less than 0.01 dtex, the moisture retention becomes too good and the drying performance after washing tends to be poor. When it exceeds 2 dtex, the space generated between the fibers becomes too large because of being too thick, and the moisture retention becomes worse. At the same time, the moisture tends to move during use, and the moisture tends to exude.
[0018]
The cross section of the fiber used for the brassiere pads of the present invention may be any cross section such as a solid, hollow, T-shaped, flat, teardrop-shaped, Y-shaped, cross-shaped, * -shaped, rice-shaped, etc. be able to. In particular, those with a large fiber surface area are preferred, and complex sections such as T-type, H-type, π-type, tear-type, Y-type, cross-type, * -type, and US-type have good moisture retention. Particularly preferred. FIG. 3 is a schematic model diagram showing an example of the cross-sectional shape of these fibers.
[0019]
Antibacterial performance is preferably imparted to the fibers constituting the brassiere pads of the present invention. For example, in order to suppress the growth of Escherichia coli or Staphylococcus aureus, any material with antibacterial performance such as organic matter and inorganic matter can be used, such as silver zeolite, metal such as copper, piganite, quaternary ammonium salt, carvalinide, Organic substances such as amphoteric surfactants, alcohols, esters, sulfamides, carboxylic acids, pyridines, nitriles, polymers, phenols, metal salts and amino acids are also effective. The means for applying such an antibacterial agent is not particularly limited, but a method of kneading into a synthetic fiber and adhering it to the fiber surface together with a binder during post-processing is preferable. As a method for evaluating antibacterial performance, there is a unified test method defined by the Council for Evaluation of New Functionality of Textile Products.
[0020]
The synthetic fiber polymer used in the brassiere pads of the present invention includes matting agents, pigments, flameproofing agents, deodorants, antistatic agents, antioxidants, ultraviolet rays, as long as the effects of the present invention are not impaired. An appropriate additive such as an absorbent or a hydrophilic agent may be added.
[0021]
The material used for the water-permeable layer of the present invention is not particularly limited, and natural fibers such as cotton, hemp, wool, and silk, synthetic fibers such as rayon and acetate, synthetic materials such as polyester, polyamide, acrylic, polypropylene, and polyethylene. Any fiber can be used, but natural fibers and rayon fibers are preferably synthetic fibers such as polyester and polypropylene, because the fibers themselves absorb water and take longer to dry after washing, and the wet feeling tends to remain. Fiber is better.
[0022]
The fibers mainly constituting the water-permeable layer and the water-absorbing water-retaining layer are preferably synthetic fibers. In the case of natural fiber, the fiber itself absorbs water, resulting in a feeling of wetting in the fiber itself, and uncomfortable during use. Also, when used repeatedly, it deteriorates due to washing, especially at high temperatures, and is used to efficiently remove dirt. This is because the deterioration of a strong detergent is quick. Here, “mainly composed” means that the content ratio is the highest in the water-permeable layer or the water-absorbing water-retaining layer, but the ratio is preferably 60% by weight or more.
[0023]
The synthetic fibers used here can be any of polyester, polyamide, acrylic, polypropylene, polyethylene, etc., but they are durable against harsh conditions such as industrial washing at high temperatures and subsequent drying. In view of the above, polyester fiber and nylon fiber are preferable.
[0024]
The brassiere pads of the present invention preferably have a flowing water layer between the water permeable layer and the water absorbing water retaining layer or in a part of the water absorbing water retaining layer.
[0025]
The flowing water layer as used herein refers to a layer having a function of diffusing mainly the liquid that has been transmitted in the thickness direction from the water-permeable layer not only in the thickness direction but also in the periphery, that is, in the plane direction. The presence of such a flowing water layer makes it easier for the liquid that has been permeated from the water permeable layer or the liquid that has been absorbed into the water-absorbing water-retaining layer to diffuse to the surroundings and receive external pressure such as the body pressure of the user. Since moisture escapes to the surroundings through the flowing water layer, it is possible to exhibit an excellent function of being difficult to return to the surface from the water permeable layer.
[0026]
The structure of the flowing water layer may be any structure such as a woven fabric, a knitted fabric, and a non-woven fabric as long as it can provide the above-described functions, for example, a so-called corrugated cardboard knit knitted into a double raschel structure. Although it is good, it is preferable that it is a nonwoven fabric from a cost viewpoint. Bonding of fibers for obtaining a nonwoven fabric may be any method such as needle punching, water jet punching, heat setting, and adhesive.
[0027]
The average fineness of main fibers constituting the flowing water layer is preferably 2 dtex or more. Preferably these effects are more exhibited when it is 4 dtex or more.
[0028]
The total thickness of the flowing water layer of the brassiere pads of the present invention is preferably 0.5 mm to 10 mm. In order to acquire the effect as a flowing water layer, it is preferable that it is 0.5 mm or more, and if it exceeds 10 mm, the diffusibility of moisture to the surroundings tends to be lowered.
[0029]
In the brassiere pads of the present invention, when the water-absorbing water-retaining layer is composed of a plurality of layers, the number of laminated layers can be adjusted according to the required water absorption amount of the product, so that it is possible to easily cope with the desired water absorption amount. Is preferred. Moreover, since a desired flowing water performance can be designed similarly to a flowing water layer also being comprised by multiple layers, it is preferable. In addition, by superposing a plurality of water-absorbing water-retaining layers and flowing water layers, it is generally easy to bend because of the displacement between the layers with respect to bending deformation, and an effect that the water-absorbing water-retaining layer or flowing water layer becomes soft can be expected. The number of layers to be laminated is not particularly limited, but is preferably 2 to 20 layers so as to be able to cope finely. Moreover, even if the water absorbing material comprised by these multiple layers is partly sewed, it may be joined by a needle punch or the like.
[0030]
FIG. 1 is a schematic model diagram showing an example of a preferable structure used for the brassiere pads according to the present invention, in which a part of the water permeable layer 1 is cut out and further a part of the water absorbing water retaining layer 3 is cut out so that the contents can be easily understood. It is illustrated. It shows that the water-absorbing water-retaining layer 3 is formed between the water-permeable layer 1 and the liquid-impermeable independent fabric 2, and they are partially joined by the sewing thread 4.
[0031]
More preferably, there are at least two water-absorbing water-retaining layers, and the flowing water layer is laminated between them, so that the water flowing through the flowing water layer is less likely to leak to the outside by adopting such a configuration.
[0032]
The water-absorbing water retaining layer used for the brassiere pads of the present invention has an area of 100 cm. ² It is preferable that the amount of voids per unit has 5 cc or more. The void amount is indicated by a value obtained by subtracting the volume occupied by the fiber from the volume of the fabric. That is, since it corresponds to the amount of moisture absorbed by capillary action, the more the better.
[0033]
100cm ² If the amount of voids is less than 5 cc, the amount of fiber voids that absorbs and retains moisture is small and sufficient water absorption performance cannot be obtained, and urine tends to return through the water-permeable layer, making it easy for users to feel wetness, etc. It is.
[0034]
Although it is better that the amount of water retained per unit area is large, since urine spreads in the water-absorbing water retaining layer, it is usually sufficient as an effect if the maximum void amount is 500 cc. The upper limit is not particularly limited, but if it is more than this, there are too many spaces to eliminate the capillary phenomenon, and when pressed, the amount of compression is large, and the contained water may be pushed out, which may be undesirable.
[0035]
The total thickness of the water-absorbing water retaining layer used in the brassiere pads of the present invention is preferably 0.5 mm to 20 mm. The thickness of the water-absorbing water-retaining layer is better as it is easier to handle, but it is better to be thicker than the amount of voids. If the total amount is less than 0.5 mm, the amount of voids is small and therefore the amount of water absorption is small and may not be used. . On the other hand, if it exceeds 20 mm, the amount of voids is large and the amount of water absorption increases, but it cannot be used from the viewpoints of handling, discomfort when worn, and price. Most preferred is 1 mm to 10 mm.
[0036]
The density of the water-absorbing water retaining layer of the present invention is not particularly limited, but is preferably 0.07 to 0.5 g / cm. ³ Range. 0.07 g / cm ³ If it is less than 1, the amount of voids increases, but moisture retention due to capillarity and the exudation of moisture when pressed due to an increase in compression rate increase, which may be undesirable. 0.5 g / cm ³ On the contrary, the fiber occupying space is large, the water holding amount is small, and it is not preferable because it is heavy, hard and expensive. The most preferred range is 0.1 to 0.4 g / cm. ³ It is.
[0037]
The water-absorbing water retaining layer used for the brass pads of the present invention preferably has a compressibility of 30% or less. If it exceeds 30%, when the water-absorbing water retaining layer contains moisture, pressing it with a finger or the like will dent and reduce the amount of voids, and the amount of moisture will ooze out, making it unsuitable for the intended use of the brassiere pad There is. In addition, those that are not compressed at all are too hard and may cause problems in use, and those with a compression rate of 2% or more are preferable.
[0038]
In order to set the compressibility of the water-absorbing water retaining layer to 2 to 30% as described above, it varies depending on the material type and fineness of the fiber used, the cross-sectional shape or the structure of the water-absorbing water retaining layer, the density, etc. Although it is difficult to say generally, for example, when a nonwoven fabric structure is formed with polyester fibers having a circular cross section at 1 dtex, the density is 100 to 300 kg / m. ³ This can be achieved.
[0039]
The structure of the water-absorbing water retaining layer of the brassiere pads of the present invention may be any of a nonwoven fabric, a woven fabric, a knitted fabric, etc., but a nonwoven fabric is preferable in order to obtain price, ease of handling, and uniform void amount. . Bonding of fibers for obtaining a nonwoven fabric may be performed by any method such as needle punching, water jet punching, heat setting, and adhesive.
[0040]
Among the fibers used in the water-absorbing water-retaining layer, as a means for obtaining fibers having a fineness of 1 dtex or less, fibers obtained by eluting the sea part using melt blow, spunbond, sea-island fibers with a chemical solution in addition to normal spinning, Any fiber such as a fiber obtained by dividing a composite fiber by a high-pressure water stream can be used.
[0041]
Among them, a method of producing a nonwoven fabric by means of making a short fiber of a split-type composite fiber composed of two incompatible polymers into a web-like shape and dividing by a high-pressure water stream, and a stable nonwoven fabric structure, Since the operation of dividing the composite fiber into a plurality of parts is completed at once, a fabric can be obtained at a low price. A method of simply using a thin fiber as it is as a non-woven fabric is not preferable because it tends to cause problems in processing, particularly in the passability of a card machine.
[0042]
Melt blow, which is a long-fiber nonwoven fabric, can obtain fineness, but polyester and nylon, which are preferable materials for water-absorbing materials, require complicated techniques and may not be preferable in terms of washing durability. Furthermore, the method of eluting sea components from sea-island composite fibers can obtain thin fibers uniformly, but the processing process may be complicated and expensive.
[0043]
When splitting a composite fiber with a water flow, it is preferable that it can be split and entangled with the lowest possible water pressure, but usually 50 kg / cm. ² The above is necessary, 50kg / cm ² If it is less than that, fibers that can be split at low water pressure are required. However, when such fibers are made into a spread sheet with a card machine, splitting takes place during the raw cotton production process, etc. It is necessary to be careful as it may not be possible. The upper limit is 250 kg / cm ² It is preferable to set the degree. More than this is not preferable because the fabric is too tight and the amount of voids is reduced.
[0044]
According to the knowledge of the present inventors, in the present invention, the main fiber constituting the water-absorbing water-retaining layer is a composite fiber as a starting material, and at least a part of the composite fiber is divided. It is preferable that there are, in particular, among the fibers constituting the water-absorbing water-retaining layer, those in which the divided fibers are 30% or more (number ratio) will improve the water-absorbing / retaining performance and have a softer texture Is preferable. Thus, the fineness of the synthetic fiber comprised by dividing | segmenting becomes 0.01-2 dtex, and improves water absorption performance more.
[0045]
Here, the split type composite fiber composed of two incompatible polymers preferably used in the present invention will be described.
[0046]
The incompatible two kinds of polymers may be any combination of polymers that can be divided by an external stimulus such as water flow, and are not particularly limited. For example, polyester and nylon, polyester and polyolefin, Polymers generally used as split-type composite fibers such as polyester and polystyrene can be used.
[0047]
Polyester polymers include, as acid components, terephthalic acid, isophthalic acid, phthalic acid, aliphatic dicarboxylic acids such as 2,6-naphthalenedicarboxylic acid, aliphatic dicarboxylic acids such as adipic acid, sebacic acid, and esters thereof. The alcohol component includes homopolyesters or copolymerized polyesters synthesized from diol compounds such as ethylene glycol, diethylene glycol, triethylene glycol, 1,4-butanediol, neopentyl glycol, and 1,4-cyclohexanedimethanol. To these copolyesters, paraoxybenzoic acid, 5-sodium sulfoisophthalic acid, polyalkyl glycol, pentaerythritol, bisphenol A and the like may be added.
[0048]
Moreover, if it is a nylon polymer, nylon-4, nylon-46, nylon-6, nylon-66, nylon-610, nylon-11, nylon-12, polymetaxylene adipamide (MXD-6), Polyaraxylene decanamide (PXD-12), polybiscyclohexylmethane decanamide (PCM-12), or a copolymerized polyamide having these monomers as constituent units may be used.
[0049]
As long as it is a polyolefin-based polymer, polyethylene, polypropylene, polybutylene, or the like may be used.
[0050]
Among these polymers, more preferably, any one of polyethylene terephthalate, polytrimethylene terephthalate, and polybutylene terephthalate copolymerized with 5-sodium sulfoisphthalic acid is used as the polyester polymer, and nylon-6 is used as the nylon polymer. It is a combination using. The split type composite fiber obtained from these components has the ability to peel off with a subsequent water jet punch without peeling off on a short fiber card or the like because it has moderate adhesiveness at the interface of both polymers. Can do. Furthermore, a split type composite fiber in which a polyester polymer is combined with polypropylene or polyethylene is also preferable.
[0051]
4, 5, and 6 are schematic model diagrams illustrating an example of a cross section of a composite fiber used in the water-absorbing material according to the present invention, and two types of polymers 1 and 2 in which split-type composite fibers are not compatible. And are arranged. In addition, about the shape of a composite fiber, it is not limited to these, The thing of an appropriate type can be used.
[0052]
Moreover, it is preferable that the water absorbing agent adheres to the surface of the fiber constituting the water absorbing / retaining layer of the brass pad of the present invention, and the water absorbing property of the water absorbing / retaining layer is 50 mm or more. The water-absorbing agent (hydrophilic processing agent) is not particularly limited as long as it can impart water absorbency, but preferably has excellent durability against washing or the like. Specifically, water-absorbing agents such as silicone-based, polyester-based, polyamide-based, acrylic-based, and urethane-based, water-absorbing agents such as cationic-based, anionic-based and non-ionic-based, water-absorbing agents such as low-molecular-weight and high-molecular-weight For example, a water absorbing agent such as special nonionic lanogen KRN-6 (manufactured by Takamatsu Yushi Co., Ltd.) or polyester resin type TO-SR-1 (manufactured by Takamatsu Yushi Co., Ltd.) is applied to the fiber surface. If the water absorption (Birec method) is less than 50 mm, the diffusion of moisture is poor, the water absorption is poor, and moisture leakage tends to occur.
[0053]
In order to make the water absorption 50 mm or more as described above, it varies depending on the material type and fineness of the fibers used, the cross-sectional shape, the structure of the water-absorbing water retaining layer, the density, etc., and it is difficult to say generally. However, according to the knowledge of the present inventors, for example, the density is 200 kg / m with a polyester fiber having a round cross section of 1 dtex. ³ In the case of a non-woven fabric structure, it can be achieved by adhering 0.5% by weight or more of a polyester resin water-absorbing agent TO-SR-1 (manufactured by Takamatsu Resin Co., Ltd.) to the constituent fibers.
[0054]
In addition, the water-absorbing water-retaining layer of the brassiere pads of the present invention preferably has a water absorption of 50 mm or more according to the Bayrec method after 10 industrial washings. This is because such a mat is often washed by a linen contractor and it is important to maintain water absorption.
[0055]
As described above, the means for maintaining water absorption after washing also varies depending on the combination of the material type and fineness of the fibers used, the cross-sectional shape, the structure of the water-absorbing water retaining layer, the density, etc. Although it is difficult to say generally, according to the knowledge of the present inventors, for example, the density is 200 kg / m with a polyester fiber having a circular cross section at 1 dtex. ³ This is achieved by adhering a polyester resin water-absorbing agent TO-SR-1 (manufactured by Takamatsu Resin Co., Ltd.) to 0.5% by weight or more and adhering it to 100% or more at a temperature of 100 degrees or more. be able to.
[0056]
In addition, the water-absorbing water retention layer used in the present invention preferably has a water absorption amount (water absorption rate) of 100% or more, and if it is less than 100%, it may not be said that sufficient water absorption performance is not obtained. More preferably, it is 250% or more, and it becomes a brass pad excellent in water absorption.
[0057]
As described above, in order to make the water absorption amount (water absorption rate) of the water absorption retention layer 100% or more, depending on the combination of the material type and fineness of the fiber used, the cross-sectional shape, the structure of the water absorption retention layer, the density, etc. However, for example, when a nonwoven fabric structure is formed with polyester fibers having a round cross section at 1 dtex, the density of the water-absorbing water retaining layer is 150 kg / m. ³ In order to achieve a water absorption amount (water absorption rate) of 200% or more, a water-absorbing water retaining layer can be achieved by adhering 0.5% by weight or more of the polyester resin water-absorbing agent TO-SR-1. Density of 200 kg / m ³ In addition, it can be achieved by adhering 2.0% by weight or more of polyester resin water-absorbing agent TO-SR-1 (manufactured by Takamatsu Resin Co., Ltd.).
[0058]
The basis weight of the water-absorbing water retaining layer used in the brass pads of the present invention is 100 g / m. ² The above is preferable. 100 g / m ² When the amount is less than 1, particularly when the discharge amount is large, the expected water retention amount may not be obtained, and problems may occur when wearing and using for a long time such as at night.
[0059]
The water-permeable layer, water-absorbing water-retaining layer or flowing water layer used for the brass pads of the present invention preferably has a vertical or horizontal shrinkage ratio of 6% or less after 10 industrial washings. This is because if the shrinkage ratio of the warp and the width after 10 times of industrial washing exceeds 6%, the water-permeable layer, the water-absorbing water-retaining layer or the flowing water layer is greatly deformed and cannot be used repeatedly. That is, due to this contraction, the difference in contraction rate between the members sewed at the same time causes puckering and impairs the commercial value, and at the same time, it tends to be in an unbearable state such as leakage and moisture backflow.
[0060]
As described above, in order to reduce the shrinkage ratio of the vertical or horizontal after 10 times of industrial washing to 6% or less, for example, the fibers constituting the water permeable layer, the water absorbing water retaining layer or the flowing water layer in advance, or the water permeable layer, water absorbing water retaining layer or This can be achieved by performing processing that suppresses shrinkage of the flowing water layer itself. In other words, as a means for obtaining such a stable shape without enduring deformation under severe washing conditions such as industrial washing, a heat history given in advance during industrial washing with a water permeable layer, a water absorbing water retaining layer or a flowing water layer made of fibers. It is preferable to shrink at a higher temperature.
[0061]
Specifically, after forming the water-absorbing layer and the water-absorbing water-retaining layer, dry heat at a temperature equal to or higher than the heat history applied during industrial washing at any stage after cutting into a predetermined shape or making a product shape for sewing, Heat treatment is performed by either wet heat or warm water to cause shrinkage. Since washing is usually performed in warm water, it is most preferable to use warm water of 80 ° C. or higher for this heat treatment means. The treatment time may be equal to or less than the high temperature washing time during washing as long as the treatment temperature difference is large, but it is preferably more effective than the high temperature washing time.
[0062]
The state of the water-absorbing water retaining layer or flowing water layer during such treatment may be any state as long as it contracts, and may be either a continuous treatment method or a batch treatment method. When processing continuously, even if heat treatment is performed in a restricted state so that the shrinkage in the width direction does not exceed a certain ratio, it is treated without tension in the width direction so as to enter freely. Also good. Preferably, it is better to process without tension in order to reduce the shrinkage rate as much as possible. More preferably, both the vertical and horizontal contractions are preferably freely contracted, and both the vertical and horizontal contractions are easily reduced to 6% or less.
[0063]
As specific heat treatment equipment, liquid flow dyeing machines can be used for hot water treatment, and equipment used for dyeing, such as a sanforize shrinkage prevention device, can be used for dry heat treatment. A washer type hot water treatment machine or a tumbler type dry heat treatment machine can be preferably used.
[0064]
The water absorption rate of the water-permeable layer used in the brass pads of the present invention is preferably 5 seconds or less after 10 industrial washings. Such bedclothes are often washed by a linen contractor, etc., and it is important to maintain the water absorption of the water-permeable layer for these washings, and the commercial value can be maintained.
[0065]
The water permeable layer used in the present invention preferably has a water absorption speed of 5 seconds or less after 10 industrial washings. To achieve this, the design of the fabric, that is, the structure of the fabric, the air flow rate, the use of a durable fabric, the polymer type, the fineness, and the cross-sectional shape of the fiber to be used are specified and combined, Can be increased. Furthermore, in order to make the absorption rate of the water permeable layer faster, it is preferable to add a water absorbing agent. By applying a water-absorbing agent and improving the water-absorbing speed, a dry feeling can be further imparted to the fabric surface.
[0066]
The water-absorbing agent may be any as long as it can reduce the surface tension of water, and examples thereof include silicone, polyester, and polyamide. In general, it is said that the use of a water-absorbing agent of the same type as the surface fabric is more effective. The amount of adhesion is effective when applied at a solid content of 0.1% or more.
[0067]
In particular, in order to set the water absorption speed of the water permeable layer to 5 seconds or less, for example, 0.5 weight of polyester resin water-absorbing agent TO-SR-1 (manufactured by Takamatsu Resin Co., Ltd.) is used as a knit material using a polyester filament of 2.3 dtex. % Can be achieved.
[0068]
The water permeable layer used in the present invention should have a large air flow rate, preferably 100 cc / cm. ² / Sec or more. 100cc / cm ² If it is less than / sec, the permeation of moisture may be hindered or the skin may be roughened. A large air flow rate is better, but if it is too large, the water absorbent fabric layer will come into contact with the human body, resulting in wet discomfort. 5000 cc / cm ² / Sec is good. As above, the air flow rate is 100cc / cm ² / Sec or more depends on the structure of the independent fabric A, the combination of the basis weight, etc., and there are some points that are difficult to say in general. For example, in the case of a tricot structure, the basis weight is 200 g / m. ² This can be achieved by:
[0069]
In addition, the water-permeable layer of the present invention preferably has a fiber or structure in which the surface layer in contact with the skin and other layers are different in order to further reduce wet discomfort. For example, the surface layer is composed of thick fibers to facilitate moisture permeation and has a rough structure, and the other layers are composed of thin fibers to form a dense structure, and moisture that contacts the surface layer passes through the surface layer quickly. In addition, the other layers absorb and diffuse this, so that the wet feeling is improved and at the same time the moisture transfer is performed quickly.
[0070]
The means for improving the performance of the water permeable layer varies depending on the material type and fineness of the fibers used, the cross-sectional shape, the structure of the water permeable layer, the type of surface treatment agent, the treatment conditions, etc. Although it is difficult to say, for example, when a knitted fabric of a tricot structure is made with a polyester fiber having a round cross section of 12 filaments at 55 dtex and 46 filaments at 55 dtex so that the former is on the surface and the latter is on the back, This can be achieved by attaching a polyester resin water-absorbing agent TO-SR-1 manufactured by Co., Ltd. around 2% by weight.
[0071]
Moreover, the surface of the water-permeable layer used for the brassiere pads of the present invention may be raised. This is because brushing gives a soft texture and a smoother feel.
[0072]
Moreover, it is preferable that the water absorption performance of the water-permeable layer used for the brassiere pads of the present invention is maintained even after the industrial washing described above is performed 10 times. For this purpose, it is preferable to use a water-absorbing agent having excellent washing durability.
[0073]
The water permeable layer is partially bonded to one side of the water-absorbing water retaining layer, but may be bonded to the back surface, which is the opposite surface, to form a sandwich.
[0074]
It is preferable that an independent fabric having liquid impermeability is positioned and attached to the back layer side of the brass pads of the present invention for the purpose of waterproofing.
[0075]
This liquid-impermeable independent fabric can be used in any form of woven fabric, knitted fabric, nonwoven fabric, film, etc., and may be a laminate thereof. In other words, it may be difficult to satisfy liquid impermeability only with woven fabrics, knitted fabrics, and nonwoven fabrics, so rubber materials, polyolefin materials, fluorine-based materials and silicone-based film materials may be bonded to these materials, Alternatively, it can be achieved by coating a rubber-based, polyolefin-based, fluorine-based or silicone-based resin, preferably a foamed resin. Moreover, water repellency can also be provided by setting it as these structures.
[0076]
At that time, the moisture permeability of the independent fabric is 4000 g / m in order to improve the stuffiness caused by catching urination. ² -It is preferable that it is 24 hours or more.
[0077]
Further, in this case, durability as a film is required, and the water pressure resistance of the independent fabric is preferably 5.0 kPa or more. When it is less than 5.0 kPa, leakage may occur.
[0078]
The technology for achieving these characteristics is specifically as described above, but is represented by a base fabric such as a woven fabric, a knitted fabric, and a non-woven fabric, for example, “ENTANT” (registered trademark, manufactured by Toray Industries, Inc.). It is possible to use a method such as coating a porous polyurethane film or a porous fluorine film represented by “GORE-TEX” (registered trademark, Gore-Tex Co., Ltd.).
[0079]
FIG. 2 is a schematic cross-sectional view showing a preferred example structure that can be used for the brassiere pads according to the present invention, and the water-absorbing water retaining layer 3 and the flowing water layer 5 between the water-permeable layer 1 and the liquid-impermeable independent fabric 2. Is configured.
[0080]
In the brassiere pads of the present invention, it is preferable that the water-permeable layer, the water-absorbing water-retaining layer, and the liquid-impervious independent fabric are partially bonded, and a peripheral part or a part of the peripheral part by a method such as sewing, Furthermore, it is better to sew a part of the inner surface by a method such as quilting.
[0081]
At that time, the water-absorbing water-retaining layer may be disposed on the entire surface of the brassiere pads, or may have a shape that is disposed only around the periphery from which the body fluid or the like is discharged.
[0082]
It is preferable that the sewing thread used for the sewing is water-repellent with a water-repellent agent such as paraffin, silicone or fluorine as long as it can easily absorb moisture.
[0083]
The present invention can be used as various pads such as brassiere pads, breast milk pads, and clothes such as shoulder pads.
[0084]
【Example】
Hereinafter, the present invention will be described in more detail with reference to examples.
[0085]
In addition, the evaluation method used for this invention is demonstrated. Evaluation methods not described here basically conform to the methods defined by JIS.
(1) Aeration rate:
According to method A of JIS-L-1096 “General Textile Testing Method”.
(2) Moisture permeability:
According to JIS-Z-0208 “Method of testing moisture permeability of moisture-proof packaging material”.
(3) Fineness of single fiber after splitting:
An SEM photograph of the cross section of the fiber was taken and calculated from the cross-sectional area.
(4) Water absorption:
According to JIS-L-1096 “General Textile Testing Method”, Method A (Byreck method).
(5) Moisture permeability:
According to method A-1 of JIS-L-1099 “Method of testing moisture permeability of textile products”.
(6) Water pressure resistance:
According to JIS-L-1092 “Waterproof test of textile products”.
(7) The amount of voids in the water-absorbing water retaining layer:
Water-absorbing layer 100cm ² The per void amount is expressed by the following formula.
[0086]
Fabric 100cm ² Perforation amount = (fabric 100cm ² Per volume)-(100cm ² The volume of fibers constituting the fabric of
Fabric 100cm ² The volume fabric around is a fabric with a thickness of 5 cm or more by overlapping the fabric used for the water-absorbing water-retaining layer, and the size is 10 g / cm to remove excess voids such as wrinkles at the beginning. ² After pre-compressing with a load of 0.5 g / cm ² Measure the thickness and vertical / horizontal size by applying the load, and divide by the number of stacked sheets.
[0087]
Even when the water-absorbing material is formed by superimposing a plurality of layers to form one water-absorbing material, the water-absorbing material is used for measurement as one water-absorbing material. That is, in that case, the one water-absorbing material is used as one unit, and they are overlapped to measure the above-mentioned thickness of 5 cm or more.
[0088]
Also 100cm ² The volume of the fibers constituting the perimeter fabric is calculated from the specific gravity of a predetermined fiber by measuring the weight and volume of the fabric. In addition, when a sample cannot take this area, it may calculate by converting again after performing an equivalent measurement.
(8) Compressibility of the water-absorbing reservoir:
The measurement of the compressibility of the water-absorbing water-retaining layer is 10 g / cm in order to remove the extra voids such as wrinkles at first by using the fabric used for the water-absorbing water-retaining layer as a sample with a thickness of 5 cm or more. ² 0.5 g / cm after pre-compression under load ² The thickness is measured under a load of T to be T1, and then 10 g / cm ² The thickness is measured under the following load, and T2 is calculated by the following equation.
[0089]
That is, this concept of compression rate represents the amount of the fabric that can be compressed.
[0090]
Compression rate (%) = (T1-T2) × 100 / T1
(9) Thickness of the water absorbing layer:
According to B method of JIS-L-1913 “General Short Fiber Nonwoven Fabric Test Method”.
(10) Industrial laundry shrinkage:
In accordance with F-2 method (intermediate washer method) of JIS-L-1042 “Textile Shrinkage Test Method”, the water temperature is set to 80 ° C. (constant), water is 1000 cc, detergent is 2 g, sodium percarbonate is 1.5 g, 3 cc of hydrogen peroxide water was added, and the sample was placed therein and treated for 30 minutes. Then, after rinsing with 40 ° C. hot water for 10 minutes, centrifugal dehydration (using a centrifugal dehydrator of a household washing machine as a centrifugal dehydrator for 1 minute) is performed on a flat bed press at 130 to 150 ° C. And dried. This was repeated 10 times.
[0091]
Mark the length of 300 mm in advance in three vertical and horizontal positions of the sample in advance, measure the length l after industrial washing,
Shrinkage rate (%) = (300−l) / 300 × 100
The vertical and horizontal values were calculated respectively.
[0092]
In the present invention, when the mark given after the washing treatment is blurred, the center is judged with the naked eye, and the length after shrinkage (after industrial washing) is measured.
(11) Water absorption speed of the fabric:
According to the dropping method of JIS-L-1907 “Test method for water absorption of textile products”.
[0093]
In addition, the water absorption rate of the fabric after 10 industrial washings is the water absorption rate evaluated using the fabric after performing the washing / drying described in (10).
(12) Degree of fabric division:
Take an SEM photograph (× 500 to 800) of the cross-section of the target fabric, and show the number of fibers A that are peeled at least one and the number of fibers B that are not completely peeled in the cut surface of one fiber. Measure and
Division ratio (%) = number of fibers A / (number of fibers A + number of fibers B) × 100
Calculate with
[0094]
Example 1
A composite fiber composed of a polymer of polybutylene terephthalate and nylon 6 and having a cross section as shown in FIG. 5, polymer 6 is polybutylene terephthalate, polymer 7 is nylon 6 and the portion of polymer 7 is divided into 6 regions. is doing. This composite fiber had a composite state of 1.8 dtex and an average fiber length of 38 mm.
[0095]
This composite fiber is spread on a card machine to produce a web, and after laminating 12 sheets of the web, a water jet punch machine is used as a pre-punch with a water pressure of 20 kg / cm. ² And then water pressure 120kg / cm ² The water flow was passed through the front, back and front for a total of 3 times to produce a nonwoven fabric.
[0096]
An aqueous solution containing Lanogen KRN-6 (made by Takamatsu Yushi Co., Ltd.) which is a special nonionic hydrophilic processing agent and TO-SR-1 (made by Takamatsu Yushi Co., Ltd.) which is a polyester resin-based hydrophilic processing agent. It was made to adhere so that the adhesion amount at the time of drying might be 2 weight% with respect to a nonwoven fabric, respectively.
[0097]
Then, it dried for 5 minutes at 100 degreeC of dry heat with the continuous dryer.
[0098]
This nonwoven fabric has a basis weight of 200 g / m. ² When the cross section of this non-woven fabric having a thickness of 0.7 mm was observed with an SEM photograph, the composite fiber was divided from the interface between polybutylene terephthalate and nylon 6. The split ratio was 62%, and the fineness of the single fiber after splitting was 0.2 dtex for nylon 6 part and 0.6 dtex for polybutylene terephthalate part. 100cm of this nonwoven fabric ² The amount of void per hole was 5.4 cc, the amount of water absorption was 300%, the compression rate was 8%, and the water absorption by the Bayrec method was 127 mm. Two of these nonwoven fabrics were stacked and cut into a width of 90 cm and a length of 90 cm, and used as a water-absorbing water retaining layer. 100cm of water-absorbing water retaining layer ² The amount of voids per unit was 10.8 cc.
[0099]
As a fabric for the water permeable layer, two types of yarns, polyethylene terephthalate yarn 55dtex, 12 filament yarn and 55dtex, 46 filament yarn, are used, and the knitted fabric is knitted with a tricot knitting machine so that the former comes to the back and the latter comes to the surface. Prepared. A polyester water-absorbing material was added to the knitted fabric so that the weight ratio was 0.5%. When the air permeability of this knitted fabric was measured, 670 cc / cm ² / Sec, the initial water absorption rate was 1 sec or less. The water absorption rate after 10 industrial washes was 2 sec.
[0100]
As a liquid impervious independent fabric, a waterproof fabric in which a polyurethane film having a thickness of 10 μm was bonded to a cloth made of polyethylene terephthalate yarn was prepared.
[0101]
The fabric for water permeable layer and the liquid impermeable independent fabric are cut into a bra pad shape, and a nonwoven fabric for water absorption and retention is laminated between them. First, the water permeable layer and the nonwoven fabric are put into 20 cotton counts of polyethylene terephthalate multifilament yarn, Sewing is carried out using a sewing thread to which 0.5% of a fluorine-based water repellent is applied, and further, the four peripheries are sewn and integrated using a sewing thread using a water-permeable layer and a liquid-impermeable independent fabric first. A brassiere pad was made. At that time, the water-permeable layer was such that a layer of fibers having a large fineness came to the side (surface) that touched the skin.
[0102]
When this bra pad is worn, when the user's breast milk leaks, it is absorbed into the bra pad and liquid does not ooze out from the bra, and the surface of the bra pad itself is smooth, so it can be used comfortably did it.
[0103]
Comparative Example 1
The same use as in Example 1 was performed using a brassiere pad made of cotton fabric. When the liquid leaked, the liquid oozed out from the brassiere pad and soiled the clothes.
[0104]
Comparative Example 2
The waterproof cloth used in Example 1 was used as a bra pad as a water absorbing material.
[0105]
When used, the liquid accumulated on the surface of the brassiere pad not only soiled the clothes, but also leaked out of the brassiere, resulting in an unpleasant condition.
[0106]
Example 2
A polyethylene terephthalate fiber having a fineness of 1.5 dtex, a fiber length of 38 mm, and an H-shaped cross-section is opened by a card machine to produce a sheet. After 12 sheets are laminated, a water jet punch machine is used as a pre-punch. Water pressure 20kg / cm ² And then water pressure 120kg / cm ² Then, a water jet punched nonwoven fabric was produced by passing the water flow a total of three times, front and back.
[0107]
After making it adhere to this nonwoven fabric so that the adhesion amount at the time of drying may be 2 weight% with respect to a nonwoven fabric with the aqueous solution containing polyester resin-type hydrophilic processing agent Meika finish SRM-65 (made by Meisei Chemical), it is the same as that of Example 1. Heat treated.
[0108]
The basis weight of this nonwoven fabric is 100 g / m ² The thickness is 0.4mm and 100cm ² The amount of void per hole was 3.2 cc, the amount of water absorption was 280%, the compression rate was 8%, and the water absorption by the Bayrec method was 150 cm or more. Three sheets of this nonwoven fabric were stacked and cut into a width of 150 cm and a length of 250 cm, and used as a water-absorbing water retaining layer. 100cm of water-absorbing water retaining layer ² The amount of voids per unit area was 9.6 cc.
[0109]
The tricot knitted fabric and waterproof fabric used in Example 1 were used as independent fabrics that were impermeable to the water-permeable layer and liquid, and both were cut to a width of 150 cm and a length of 250 cm and sewn to produce the brassiere pad of the present invention. did.
[0110]
When the user leaked breast milk in the same manner as in Example 1, moisture was absorbed into the brassiere pad, and the surface of the brassiere pad itself was smooth and could be used comfortably.
[0111]
Example 3
Five sheets of the nonwoven fabric produced in Example 1 were overlapped to form a water-absorbing water retaining layer. 100cm of water-absorbing water retaining layer ² The amount of voids per unit area was 9.6 cc.
[0112]
As the fabric for the water permeable layer, polyethylene terephthalate yarns of 110 dtex, 24 filaments, 84 dtex, 24 filaments, 84 dtex, 36 filaments, three types of yarn are used. We prepared a knitted fabric that was knitted so as to come in and raised the surface. A polyester resin water-absorbing agent TO-SR-1 (manufactured by Takamatsu Yushi Co., Ltd.) was applied to the knitted fabric so that the weight ratio was 0.5%. The initial water absorption rate of this knitted fabric was 1 sec or less, and the water absorption rate after 10 industrial washings was 1.0 second.
[0113]
This fabric and five nonwoven fabrics used in Example 1 were overlapped so that the raised surface of the fabric was the surface, and cut into a bra pad form and sewed to produce a brass pad.
[0114]
When this bra pad is used during sports, it quickly absorbs sweat from the chest, does not leave moisture on the bra pad surface, and does not reverse even when a load is applied, so there is no moisture and it feels smooth and comfortable Could be used.
[0115]
【The invention's effect】
According to the brassiere pads of the present invention according to claim 1, brassiere pads that exhibit excellent absorbency and have little wet feeling during use can be obtained. Moreover, since it is excellent in dimensional stability in washing, economical brass pads that can be used repeatedly are provided.
[0116]
Furthermore, if the brassiere pads of the present invention are used for a breast milk pad, a brassiere having a comfortable feeling of use can be obtained even if liquid such as breast milk leaks.
[0117]
In addition, it can be used as a bra for regular exercise or a bra dedicated to exercise such as sports.
[0118]
According to the brassiere pads of the present invention according to claim 2, in particular, the liquid that has been permeated from the water-permeable layer or the liquid that has been absorbed into the water-absorbing water-retaining layer is likely to diffuse to the surroundings in the flowing water layer. When an external pressure such as a person's body pressure is received, an excellent function can be exhibited in which moisture escapes to the surroundings through the flowing water layer and is difficult to return to the surface from the water permeable layer.
[0119]
Further, according to the brassiere pads of the present invention according to claim 3, an excellent one can be realized particularly in that the absorbed moisture is quickly diffused to the surroundings.
[0120]
Further, according to the brassiere pads of the present invention according to claim 4, it is possible to realize an excellent one in that a function of efficiently diffusing absorbed moisture is provided.
[0121]
Moreover, according to the brassiere pads of this invention concerning Claim 5, what was excellent in the point of especially high water absorption performance is realizable.
[0122]
Further, according to the brassiere pads of the present invention according to claim 6, an excellent one can be realized in that moisture does not ooze out even when pressed with a finger or the like.
[0123]
Further, according to the brassiere pads of the present invention according to claim 7, since a part of at least a part of the composite fiber is used as a starting material, it is possible to form a fiber space with ultrafine fibers, and to absorb water The thing excellent in the point of the improvement of the water absorption water retention performance of a layer is realizable.
[0124]
Further, according to the brassiere pads of the present invention according to the eighth aspect, particularly in the effect of the fifth aspect, since the ratio of the divided ultrafine fibers is increased, the water absorption and water retention performance is naturally improved. The thing which was excellent in the point which can provide a texture is realizable.
[0125]
Further, according to the brassiere pads of the present invention according to the ninth aspect, those having particularly high water absorption performance can be realized.
[0126]
Moreover, according to the brassiere pads of this invention concerning Claim 10, the thing excellent in the point that water absorption performance is maintainable also to the severe washing especially implemented by the linen contractor etc. is realizable.
[0127]
Moreover, according to the brassiere pads of this invention concerning Claim 11, what has especially high water absorption performance is realizable.
[0128]
Further, according to the brassiere pads of the present invention according to claim 12, those that are excellent when used for a long time such as at night can be realized in that the water absorption capacity is large especially when used as a sheet.
[0129]
Further, according to the brassiere pads of the present invention according to claim 13, it is possible to realize an excellent one in that it is excellent in form stability even in severe washing carried out by a linen contractor.
[0130]
Further, according to the brassiere pads of the present invention according to the fourteenth aspect, it is possible to realize an excellent one in that the water absorption performance can be maintained and can be used repeatedly even in severe washing carried out by a linen contractor.
[0131]
Further, according to the brassiere pads of the present invention according to claim 15, an excellent one can be realized in that moisture does not leak onto the brassiere surface and clothes are not soiled.
[0132]
Moreover, according to the ballader pads of the present invention according to the sixteenth aspect, an excellent one can be realized in that it has a particularly high durability and a moisture resistance effect.
[0133]
According to the brassiere pads of the present invention according to claim 17, excellent brass pads can be realized in that they are less likely to be steamed even when moisture is received.
[Brief description of the drawings]
FIG. 1 is a schematic model diagram showing an example of a preferred structure used in brassiere pads according to the present invention, in which a part of a water permeable layer 1 is cut out and further a part of a water absorbing water retaining layer 3 is cut out. The contents are easy to understand. It shows that the water-absorbing water-retaining layer 3 is formed between the water-permeable layer 1 and the liquid-impermeable independent fabric 2, and they are partially joined by the sewing thread 4.
FIG. 2 is a schematic cross-sectional view showing an example of a preferable structure that can be used in brassiere pads according to the present invention, and a water-absorbing water retaining layer between a water-permeable layer 1 and a liquid-impermeable independent fabric 2; 3 and the flowing water layer 5 are configured.
FIG. 3 is a schematic model showing another example of the cross-sectional shape of a split type composite fiber (raw cotton) that can be used when producing a water-absorbing water-retaining layer that can be used for the brassiere pads according to the present invention. FIG.
FIG. 4 is a schematic model showing another example of the cross-sectional shape of a split type composite fiber (raw cotton) that can be used when producing a water-absorbing water-retaining layer that can be used for brassiere pads according to the present invention. FIG.
FIG. 5 is a schematic model showing another example of the cross-sectional shape of a split type composite fiber (raw cotton) that can be used when producing a water-absorbing water-retaining layer that can be used for the brassiere pads according to the present invention. FIG.
FIG. 6 is a schematic model diagram showing an example of a cross-sectional shape of a fiber that can be used in a water-absorbing water-retaining layer that can be used in brassiere pads according to the present invention.
[Explanation of symbols]
1: Permeable layer
2: Liquid-impermeable independent fabric
3: Water absorption layer
4: Sewing thread
5: Flowing water layer
6: Polymer
7: Polymer

Claims (17)

Pads having a fabric-like water-permeable layer and a water-absorbing water-retaining layer made of fibers as constituent materials, wherein the water-absorbing speed of the water-permeable layer is 5 seconds or less, and the average fineness of the main fibers constituting the water-permeable layer is the water-absorbing layer A brassiere pad characterized in that the main fiber constituting the water retention layer is thicker than the average fineness of the main fiber constituting the water retention layer and the synthetic fiber having an average fineness of 0.01 to 2 dtex. The brassiere pads according to claim 1, further comprising a flowing water layer between the water-permeable layer and the water-absorbing water-retaining layer or a part of the water-absorbing water-retaining layer. The brassiere pads according to claim 1 or 2, wherein the average fineness of the main fibers constituting the water-permeable layer is 2 dtex or more. The brass pad according to any one of claims 1 to 3, wherein the thickness of the flowing water layer is 0.5 mm to 10 mm. The amount of voids per 100 cm ^{2 of the} water-absorbing water-retaining layer is 5 cc or more, and the total thickness of the water-absorbing water-retaining layer is 0.5 mm to 20 mm. Bra pads. The brass pad according to any one of claims 1 to 5, wherein the water-absorbing water-retaining layer has a compression rate of 30% or less. The brassiere according to any one of claims 1 to 6, wherein the main fiber constituting the water-absorbing water-retaining layer is a composite fiber as a starting material, and at least a part of the composite fiber is divided. Pads. The brassiere pads according to claim 7, wherein among the fibers constituting the water-absorbing water retaining layer, the divided fibers are 30% or more. The water absorbing agent is adhered to the surface of the fiber constituting the water absorbing / retaining layer, and the water absorbing property of the water absorbing / retaining layer is 50 mm or more according to the birec method. The described bra pads. The brass pad according to any one of claims 1 to 9, wherein the water-absorbing water retaining layer after industrial washing 10 times has a water absorption of 50 mm or more according to the birec method. The bra pad according to any one of claims 1 to 10, wherein the water absorption rate of the water absorbing / retaining layer is 100% or more. The brassiere pads according to any one of claims 1 to 11, wherein the water-absorbing water retention layer has a basis weight of 100 g / m ² or more. The bra pad according to claim 11 or 12, wherein the water-permeable layer, the water-absorbing water retaining layer or the flowing water layer has a vertical or horizontal shrinkage ratio of 6% or less after 10 industrial washings. The bra pad according to any one of claims 1 to 13, wherein the water absorption rate of the water permeable layer is 5 seconds or less after 10 industrial washings. The bra pad according to any one of claims 1 to 14, wherein an independent fabric having liquid impermeability is located on the back surface layer of the water-absorbing water retaining layer. The bra pad according to claim 15, wherein the water-proof pressure of the independent liquid-impermeable fabric is 5.0 kPa or more. The bra pad according to claim 15 or 16, wherein the moisture permeability of the liquid-impermeable independent fabric is 4000 g / m ² · 24 hr or more.

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