JP6383178B2 - Blood / virus barrier laminated fabric with excellent washing durability - Google Patents

Description

  The present invention relates to a blood / virus barrier laminate fabric that is suitable for use mainly when sewing outer garments of medical staff, and has excellent moisture permeability and excellent washing durability.

  Conventionally, as a blood barrier laminated fabric having excellent moisture permeability, a laminated fabric integrated in the order of a surface material, a first adhesive layer, a microporous polytetrafluoroethylene film, a second adhesive layer and a lining is known. (Paragraph 0003 of Patent Document 1 below). The reason why the microporous polytetrafluoroethylene film is used is that it is excellent in moisture permeability, resistance to various chemicals and in blood barrier properties.

  However, it is known that the microporous polytetrafluoroethylene film has insufficient friction durability (paragraph 0004 of Patent Document 1 below). Therefore, when the outer garment using the blood barrier laminate fabric is repeatedly washed or sterilized, the blood barrier property, virus barrier property and the like are lowered. For this reason, it has been proposed to improve the friction durability by forming a hydrophilic resin film in a specific manner on one surface of a microporous polytetrafluoroethylene film (the scope of claims of Patent Document 1 below) Section).

JP 2001-315236 A

  An object of the present invention is to provide a blood / virus barrier laminate fabric that improves friction durability and is excellent in washing and sterilization durability without using the means described in Patent Document 1.

  This invention solves the said subject by devising the composition of resin which comprises an adhesive bond layer, and the form of an adhesive bond layer.

  That is, in the laminated fabric formed by laminating and integrating the outer material, the first adhesive layer, the microporous polytetrafluoroethylene film having moisture permeability, the second adhesive layer and the lining in this order, the outer material and the lining material are polyester fibers. The first and second adhesive layers are both composed of a resin composition containing a polycarbonate-based polyurethane resin having no moisture permeability, and further, the first and second adhesive layers The present invention relates to a blood / virus barrier laminate fabric excellent in washing durability, characterized in that one of the agent layers is formed on the entire surface and the other is formed on the entire surface.

  The blood / virus barrier laminate fabric excellent in washing durability according to the present invention is laminated and integrated in the order of the outer material, the first adhesive layer, the microporous polytetrafluoroethylene film, the second adhesive layer and the lining. In addition, since the compositions and forms of the first and second adhesive layers are specified, even if repeated washing and sterilization treatments are performed, there is an effect of maintaining the original blood barrier property and virus barrier property.

Hereinafter, the present invention will be described in detail.
The blood / virus barrier laminate fabric according to the present invention is excellent in washing durability. That is, the outer garment using the blood / virus barrier laminate fabric is not disposable but can be used after repeated washing and sterilization. The blood / virus barrier laminate fabric according to the present invention is formed by laminating and integrating a surface material, a first adhesive layer, a microporous polytetrafluoroethylene film, a second adhesive layer, and a backing in this order.

  The outer material and the lining material are fiber fabrics composed mainly of polyester fibers. The reason why the polyester fiber is employed is that this material is excellent in durability for washing and sterilization, and is excellent in cost and versatility. As the polyester fiber, polyethylene terephthalate fiber or polybutylene terephthalate fiber is used. Of course, other fibers may be mixed within a range that does not affect washing and sterilization durability. Examples of other fibers include polyamide fibers such as nylon 6 and nylon 66, polyacrylonitrile fibers, polyvinyl alcohol fibers, triacetate fibers, and natural fibers such as cotton and hemp.

  As the fiber fabric, a knitted fabric or a nonwoven fabric is used. From the viewpoint of washing and sterilization durability, a woven or knitted fabric is preferable. Specifically, knitted fabrics knitted and woven using multifilament yarns or spun yarns made of polyethylene terephthalate fibers are used as the outer material and the lining material. Moreover, it is preferable to employ the same knitted fabric for the outer material and the lining material. When the same knitted fabric is used, the outer material and the lining material exhibit the same shrinkage behavior during washing and sterilization treatment, so the outer material and the lining material and the polytetrafluoroethylene film are difficult to peel off, and the durability of the washing and sterilization treatment is improved. It is because it improves.

  The microporous polytetrafluoroethylene film having moisture permeability is a known one having a porosity of about 50 to 90% and a maximum pore diameter of about 0.01 to 10 μm. Moreover, the thickness is about 6-50 micrometers. Specifically, Gore-Tex (registered trademark, W, L, manufactured by Gore and Associates, Inc.) and Tetlatex (registered trademark, manufactured by Nippon Donaldson), which are commercially available products, are used. The microporous polytetrafluoroethylene film has improved friction durability and the like due to the first adhesive layer and the second adhesive layer.

  The first and second adhesive layers are each composed of a resin composition containing a polycarbonate polyurethane resin having no moisture permeability. From the viewpoint of realizing the blood barrier property and virus barrier property, it is necessary to use a material that does not have moisture permeability. As the polycarbonate-based polyurethane resin having no moisture permeability, for example, a one-shot method in which a polycarbonate diol, an organic polyisocyanate and a chain extender are charged together and reacted, or a polycarbonate diol and an organic polyisocyanate are reacted in advance, A known product obtained by a prepolymer method for producing a polyurethane by adding a chain extender may be used.

  Examples of the polycarbonate diol include alkyl diols such as 1,4-butanediol, 1,5-pentanediol and 1,6-hexanediol, 2,2-dimethyl-1,3-propanediol, and 2,2-diethyl-1. , 3-propanediol, 2-pentyl, 2-propyl-1,3-propanediol, etc., one or more diols such as 2,2-dialkyl-1,3-propanediol, diphenyl carbonate, dito Examples thereof include those obtained by transesterification with one or more carbonic acid diesters such as diaryl carbonates such as reel carbonate, dialkyl carbonates such as dimethyl carbonate and diethyl carbonate, alkylene carbonates such as ethylene carbonate and tetramethylene carbonate, and the like. . Among them, from the standpoints of solubility in organic solvents and viscosity as a molten resin, it is meant to reduce crystallinity. As the diol, 2,2-dialkyl-1,3-propanediol polycarbonate diol is mainly used, and carbonic acid diester. From the viewpoint of durability against high-pressure moist heat sterilization, it is preferable to use diaryl carbonate as a main component.

  Examples of organic polyisocyanates include aliphatic diisocyanates such as tetramethylene diisocyanate and hexamethylene diisocyanate, alicyclic diisocyanates such as 1,4-cyclohexane diisocyanate and isophorone diisocyanate, xylylene diisocyanate, and aromatics such as 4,4′-diphenyl diisocyanate. Group diisocyanates. Among these, from the viewpoint of durability against high-pressure wet heat sterilization, it is preferable to use aromatic diisocyanate as a main component.

  As the chain extender, 1,4-butanediol, 1,6-hexanediol, ethylenediamine or the like is used alone or in combination.

  The resin composition constituting the first and second adhesive layers contains a polycarbonate-based polyurethane resin having no moisture permeability as described above, and the resin composition may be composed of this alone. If necessary, other resins may be contained. As the resin in this case, any resin can be used. For example, a polyurethane resin having moisture permeability can be used. The use ratio of the polyurethane resin having moisture permeability is preferably 50% by mass or less from the viewpoint of blood / virus barrier properties.

  As such a polyurethane resin, a conventionally known resin obtained by reacting a polyisocyanate component and a polyol component by the above-described method or the like can be adopted.

  Examples of the polyisocyanate component include aromatic diisocyanates such as tolylene-2,4-diisocyanate and 4,4′-diphenylmethane diisocyanate, and aliphatic diisocyanates such as 1,6-hexamethylene diisocyanate and 1,4-cyclohexane diisocyanate. Used. On the other hand, examples of the polyol component include polyether polyols such as polyethylene glycol and polypropylene glycol, and polyester polyols that are reaction products of diols such as ethylene glycol and propylene glycol with dibasic acids such as adipic acid and sebacic acid. Used. In particular, when it is desired to obtain a high level of moisture permeability, it is preferable to use a polyurethane resin in which the ratio of the oxyethylene group of the polyol is relatively increased.

  As a kind of resin composition which comprises each adhesive bond layer, a solventless type adhesive (hot melt type adhesive) or a solution type adhesive may be sufficient. As the solventless adhesive, it is preferable to employ a type that cures with moisture in the air (moisture curing type). As the solution-type adhesive, it is preferable to employ a two-component adhesive comprising a curing agent and a polycarbonate polyurethane resin.

  In the present invention, one of the first and second adhesive layers is formed on the entire surface, and the other is formed on the entire surface. Thereby, the blood / virus barrier property and moisture permeability can be made compatible as a whole laminated fabric.

  The whole surface shape literally means an aspect in which layers are formed continuously substantially without gaps. Specifically, it means a state having an occupied area of 95% or more with respect to the entire bonding surface.

  On the other hand, the non-full surface state refers to an aspect in which not all of the layers are composed of an adhesive, but are composed of an adhesive existing area and an adhesive absent area. Specifically, the occupied area with respect to the entire bonding surface is preferably 20 to 80%, more preferably 30 to 70%. If the area occupied is less than 20%, the adhesive layer tends to delaminate no matter how thick the adhesive layer is. On the other hand, if it exceeds 80%, the moisture permeability level of the other adhesive layer formed on the entire surface However, the moisture permeability of the laminated fabric as a whole is lowered and the wearing feeling tends to be lowered. In order to form a non-entire layer, an adhesive existing area having a pattern such as a dot shape, a line shape, a lattice shape, a checkered pattern, or a tortoiseshell pattern may be formed by using a gravure roll, a rotary screen or the like. The adhesive existing area is generally provided regularly.

  The adhesive layer in this invention is comprised from the resin composition containing the polycarbonate-type polyurethane resin which does not have moisture permeability as stated above. Polycarbonate polyurethane resins that do not have moisture permeability are generally excellent in moisture and heat resistance under high temperature and high pressure. Therefore, when an adhesive layer is formed from a resin composition containing the polyurethane resin, the laminated fabric as a whole has durable blood barrier properties and viruses. Barrier property is obtained. In particular, blood barrier properties and virus barrier properties tend to be improved by forming the adhesive layer over the entire surface. However, if both adhesive layers are formed on the entire surface, the improvement of blood / virus barrier properties can be expected, but the moisture permeability is greatly reduced. Therefore, in the present invention, from the viewpoint of achieving both blood / virus barrier properties and moisture permeability, one adhesive layer is formed over the entire surface and the other is formed over the entire surface.

  As described above, the resin composition forming the adhesive layer can contain a moisture-permeable polyurethane resin or the like as necessary. However, generally, a polyurethane resin having moisture permeability tends to be inferior in heat and moisture resistance compared to a polycarbonate polyurethane resin having no moisture permeability. Therefore, a resin composition containing a polyurethane resin having moisture permeability is used. When the adhesive layer on the non-full surface side is formed, it may be difficult to obtain a durable blood / virus barrier property rarely for the entire laminated fabric. Therefore, it is preferable to use a resin composition mainly containing a polycarbonate-based polyurethane resin having no moisture permeability when forming the adhesive layer on the non-full surface side. Here, the “main body” means a substance that satisfies a content of 95% by mass or more.

  On the other hand, as for the adhesive layer on the entire surface side, a resin composition mainly containing a polycarbonate-based polyurethane resin having no moisture permeability may be used in the formation, and the adhesive layer having no moisture permeability may be used. May be used. In addition, in the category of “entire shape”, for example, a layer is formed in a pattern using a polycarbonate polyurethane resin having no moisture permeability, and at the same time, a layer in a pattern is formed using a polyurethane resin having moisture permeability. And a pattern in which both patterns are combined to form a substantially entire surface is also included. In this case, the ratio between the two patterns may be appropriately determined in view of desired moisture permeability and durability. In view of blood / virus barrier washing durability, it is not preferable to form the adhesive layer with a moisture-permeable polyurethane resin alone.

  In order to form the entire surface of the adhesive layer, for example, when using a resin composition containing a polycarbonate polyurethane resin having no moisture permeability and a polyurethane resin having moisture permeability, a comma coater or the like is used. An adhesive layer may be formed. In addition, in the case where each of the pattern layers is formed using what has and does not have moisture permeability, if a printing machine such as a rotary screen, a flat screen, or a hand screen is used, the combined pattern The whole surface pattern can be easily formed. For example, in the case of a checkered pattern, first, a pattern made of a polycarbonate-based polyurethane resin having no moisture permeability is formed. Thereafter, a pattern made of a polyurethane-based resin having moisture permeability may be formed on the non-coated surface at this time so that the entire pattern is almost the entire pattern.

  As the thickness of the adhesive layer, both the first and second adhesive layers may be about 10 to 100 μm, and preferably 20 to 70 μm. If the thickness is less than 10 μm, it is difficult to obtain a laminate fabric having a peeling resistance, no matter how much the application area of the adhesive is increased. On the other hand, if the thickness exceeds 100 μm, it is disadvantageous in terms of cost, and the basic as a laminated fabric. There is a tendency that improvement in performance cannot be expected, and both are not preferable.

Since the laminated fabric of the present invention uses a microporous polytetrafluoroethylene film having moisture permeability, it is excellent in moisture permeability and waterproof performance. Specifically, as the moisture permeability, the moisture permeability according to the JIS L1099B-1 method is preferably in the range of 2000 to 10000 g / m ² · 24 hrs. If the moisture permeability is less than 2000 g / m ² · 24 hrs, the moisture permeability is not sufficient, and sufficient comfort may not be obtained when worn as a surgical gown. On the other hand, if it exceeds 10,000 g / m ² · 24 hrs, the virus barrier property tends to be gradually lowered while repeating the wearing and the industrial washing / sterilization treatment, which is not preferable.

  The laminated fabric of the present invention may be water repellent. In this case, a surface and lining that have been subjected to water repellency in advance may be used. However, from the viewpoint of washing durability, it is preferable that the entire fabric is subjected to water repellency after being laminated. As the water repellent, known ones such as paraffinic water repellent, polysiloxane water repellent, and fluorine water repellent can be used. As a method for imparting water repellency (water repellency), a known method such as a spray method, a padding method, or a coating method can be employed. As an example, a laminated fabric is padded with an aqueous dispersion containing 3 to 10% by mass of a fluorine-based water repellent at a pickup rate of 30 to 100%, dried at 80 to 130 ° C., and then 20 to 150 to 180 ° C. By performing heat treatment for 2 seconds to 2 minutes, good water repellency can be imparted.

  Since the laminated fabric of the present invention is excellent in blood barrier property and virus barrier property washing durability, it is suitable as a material for sewing outer garments of medical workers such as surgical clothes. Moreover, it is suitable also as a raw material at the time of sewing a manufacturer's work clothes, such as a foodstuff and a medicine.

  EXAMPLES Hereinafter, although this invention is demonstrated concretely based on an Example, this invention is not limited to these. The present invention is based on the knowledge that by providing the first adhesive layer and the second adhesive layer in a specific manner, a blood and virus barrier laminate fabric excellent in washing and sterilization durability can be obtained. Should be interpreted as:

Example 1
The following materials were prepared as a surface material, a lining material, a microporous polytetrafluoroethylene film having moisture permeability, and an adhesive.

[Outer material and lining]
Using a polyethylene terephthalate multifilament yarn 56dtex24f, a 32G tricot half was knitted and scoured by a known method (scouring agent; “Sun Mall FL” manufactured by Nikka Chemical Co., Ltd., 1 g / L, 20 minutes at 80 ° C.), dyeing ( Disperse dye; “Dianix Blue UN-SE” manufactured by Dystar Japan Co., Ltd., 0.5% omf, 30 minutes at 130 ° C.) was prepared to prepare a surface material and a lining material. The outer and lining are the same.

[Microporous polytetrafluoroethylene film having moisture permeability]
A polytetrafluoroethylene film (made by Nippon Donaldson Co., Ltd., trade name “Tetratex” (registered trademark)) having a thickness of 20 μm was prepared.

  On one side of the polytetrafluoroethylene film, a gravure roll as shown below, a polycarbonate polyurethane adhesive having no moisture permeability (manufactured by DIC Corporation, a moisture-curing non-solvent adhesive, trade name “Tyforth NH- 100 × ”(registered trademark)) melted at 120 ° C. was applied to provide a first adhesive layer.

That is, the gravure roll has a lattice pattern recess (depth 0.2 mm), the number of lines constituting the lattice pattern is 17 / inch, and each line width is 0.37 mm. The area (occupied area of the recess) is 42%. The concave part of the gravure roll was filled with an adhesive (viscosity 2500 mPa · s) melted at 120 ° C., and the adhesive was applied on one side of the polytetrafluoroethylene film with a lattice pattern to provide a first adhesive layer. The application amount of the adhesive was about 15 g / m ² , the thickness of the adhesive layer was about 30 μm, and the application area (occupied area with respect to the entire adhesion surface) was about 50%. After the adhesive was applied, it was naturally cooled, the surface material was laminated at a pressure of 300 kPa, and aged at 40 ° C. for 2 days to obtain a laminated fabric comprising the surface material and a polytetrafluoroethylene film.

Subsequently, on the polytetrafluoroethylene film surface of the laminated fabric, a polycarbonate polyurethane adhesive (solid content 55 mass%, viscosity 3000 mPa · s / 25 ° C.) having the composition shown in Formula 1 below is applied to the comma coater. Then, the entire surface was coated at a coating amount of 50 g / m ² and dried at 120 ° C. for 3 minutes to form a second adhesive layer having a thickness of about 30 μm. Next, the backing was laminated at a pressure of 300 kPa and aged for 4 days.

<Prescription 1>
Resamine UD-8373 100 parts by mass (manufactured by Dainichi Seika Kogyo Co., Ltd., polycarbonate-based polyurethane adhesive having a solid content of 70% by mass)
Rezamin UD cross-linking agent 12 parts by mass (manufactured by Daiichi Seika Kogyo Co., Ltd., isocyanate-based cross-linking agent having a solid content of 75% by mass)
Rezamin UD-103NT 1 part by mass (Daiichi Seika Kogyo Co., Ltd., reaction accelerator)
30 parts by mass of methyl ethyl ketone

  Next, a fluorine-based water repellent emulsion shown in the following prescription 2 was prepared, applied with a water repellent at a pickup rate of 40% by the padding method, dried at 120 ° C. for 2 minutes, and then finalized at 170 ° C. for 1 minute. Set as a blood / virus barrier laminate fabric with excellent washing durability

<Prescription 2>
Asahi Guard AG-E082 50 parts by mass (Asahi Glass Co., Ltd., fluorinated water repellent emulsion)
Meikanate WEB 10 parts by mass (made by Meisei Chemical Industry Co., Ltd., blocked isocyanate crosslinking agent)
10 parts by mass of isopropyl alcohol

(Example 2)
Instead of the prescription 1 in Example 1, the second adhesive layer is formed on the entire surface by using a polycarbonate-based polyurethane adhesive (solid content 53 mass%, viscosity 2500 mPa · s / 25 ° C.) having the composition shown in the following prescription 3. A blood / virus barrier laminate fabric was obtained in the same manner as in Example 1 except that it was formed.

<Prescription 3>
Resamine UD-8373 70 parts by mass (manufactured by Dainichi Seika Kogyo Co., Ltd., polycarbonate-based polyurethane adhesive having a solid content of 70% by mass)
Heimlen Y-119E 30 parts by mass (manufactured by Dainichi Seika Kogyo Co., Ltd., polyether moisture-permeable polyurethane adhesive having a solid content of 60% by mass)
Rezamin UD cross-linking agent 11 parts by mass (manufactured by Dainichi Seika Kogyo Co., Ltd., isocyanate-based cross-linking agent having a solid content of 75% by mass)
Rezamin UD-103NT 1 part by mass (Daiichi Seika Kogyo Co., Ltd., reaction accelerator)
Methyl ethyl ketone 15 parts by mass Toluene 15 parts by mass

(Example 3)
A blood / virus barrier laminate fabric was obtained in the same manner as in Example 1 except that the second adhesive layer was formed as follows. That is, the second adhesive layer of the entire pattern was formed by forming a combined pattern by two-step application by hand screen printing.

  Specifically, the first-stage hand screen print uses a 100 mesh screen and a polyurethane-based moisture-permeable adhesive (manufactured by DIC Corporation, a moisture-curing non-solvent adhesive, trade name “Tyforth WT”). -004 "(registered trademark) melted at 120 ° C. (viscosity 3000 mPa · s) was printed in a square checkered pattern having a thickness of about 30 μm and a side of 5 mm. Subsequently, in the second stage, a 100-mesh screen is used on the non-coated surface of the first stage, and a polycarbonate-based polyurethane adhesive (manufactured by DIC Corporation, a moisture-curable solventless adhesive, a trade name “ Tyforth NH-100X ”(registered trademark) melted at 110 ° C. (viscosity 3000 mPa · s) is printed on a square checkered pattern with a thickness of about 30 μm and a side of 5 mm, and the entire pattern is formed as a combined pattern A second adhesive layer was obtained.

(Comparative Example 1)
In Example 1, after forming the first adhesive layer, the second adhesive layer was implemented except that the same adhesive layer as the first adhesive layer was formed on the other polytetrafluoroethylene film surface. A laminated fabric was obtained in exactly the same manner as in Example 1.

(Comparative Example 2)
Instead of the formulation 1 in Example 1, a polyurethane resin solution having a composition shown in the following formulation 4 (solid content 52 mass%, viscosity 2800 mPa · s) is used to form the second adhesive layer on the entire surface, A laminated fabric was obtained by the same method as in Example 1.

<Prescription 4>
Heimlen Y-119E 100 parts by mass (manufactured by Dainichi Seika Kogyo Co., Ltd., polyether moisture-permeable polyurethane adhesive having a solid content of 60% by mass)
Resamine NE crosslinking agent 11 parts by mass (manufactured by Dainichi Seika Kogyo Co., Ltd., an isocyanate crosslinking agent having a solid content of 75% by mass)
Rezamin HI-215 1 part by mass (Daiichi Seika Kogyo Co., Ltd., reaction accelerator)
20 parts by mass of toluene

(Comparative Examples 3 and 4)
In Example 3, when forming the second adhesive layer, the checkered pattern formation by the first-stage polyurethane-based moisture-permeable adhesive is omitted (Comparative Example 3), or the second-stage polycarbonate-based polyurethane adhesive is checked. A laminated fabric was obtained in exactly the same manner as in Example 3 except that the pattern formation was omitted (Comparative Example 4).

  Table 1 shows the evaluation results of the laminated fabrics of Examples 1 to 3 and Comparative Examples 1 to 4.

  From the above results, it was confirmed that the laminated fabric of the present invention has an appropriate moisture permeability and is very excellent in resistance to industrial washing and virus barrier properties. On the other hand, the laminated fabric according to the comparative example has insufficient resistance to virus barrier properties, and particularly the fabric according to comparative examples 2 and 4 has insufficient peeling resistance.

  In addition, the industrial laundry and sterilization treatment employ | adopted the following simple methods, and evaluated the water resistance, water vapor permeability, blood barrier property, virus barrier property, etc. by the following method.

[Industrial laundry]
Using an industrial washing machine (LM-W type, manufactured by Suga Test Instruments Co., Ltd.), the following conditions were set to 1 cycle (10 times) from a standard washing time of “73 ° C. × 20 minutes”.
Bath ratio; 1:40 (1.5 kg: 60 L)
Detergent: Pure soap (manufactured by Fudo Chemical Co., Ltd.) 1 g / L, caustic soda 0.08 g / L and a pH value adjusted to 10 were used.
Process: Washing (73 ° C x 200 minutes) → Hot water washing (40 ° C x 30 minutes) → Overflow rinsing (room temperature x 15 minutes) → Dehydration → Tumble drying (60 ° C x 20 minutes)

[Sterilization (autoclave treatment)]
Using a high-pressure steam sterilizer “HV50” manufactured by Hirayama Seisakusho, the standard one-time sterilization time from “135 ° C. × 8 minutes” to “135 ° C. × 80 minutes” is one cycle (10 times). did.

(1) Water pressure resistance Measured based on JIS L1092 (high water pressure method). Since the front and back are knitted fabrics, excessive blistering occurs at the time of water pressure resistance measurement, which often hinders the measurement. For the purpose of preventing this, a flat fabric using nylon 6 multifilament yarn 78dtex24f is used for the purpose. 210 taffeta (a warp density of 120 pieces / 織物, a weft density of 90 pieces / 吋) of a woven fabric was measured on a laminated fabric.

(2) Moisture permeability It measured based on JIS L1099B-1 method (potassium acetate method).

(3) Peel strength The peel strength in the warp direction was measured according to JIS L1089. In measuring the peel strength, the outer material and the lining material are held with a chuck, and the peel strength between the outer material and the lining material is measured.

(4) Artificial blood barrier property It evaluated based on ASTMF1670-08B method.

(5) Virus barrier property It evaluated based on ASTMF1671-07B method.

(6) Resistance For samples subjected to 5 cycles of the industrial washing and autoclave continuous treatment, the state of visual peeling of the samples was observed, the water pressure resistance was measured, and the artificial blood barrier properties and virus barrier properties were also evaluated. .

Claims (3)

  In the laminated fabric formed by laminating and integrating the outer material, the first adhesive layer, the microporous polytetrafluoroethylene film having moisture permeability, the second adhesive layer, and the lining in this order, the outer material and the lining are mainly polyester fibers. The first and second adhesive layers are each composed of a resin composition containing a polycarbonate-based polyurethane resin having no moisture permeability, and further, the first and second adhesive layers Among them, a blood / virus barrier laminate fabric excellent in washing durability, characterized in that one is formed on the entire surface and the other is formed on the entire surface. The blood / virus barrier laminate fabric excellent in washing durability according to claim 1, wherein the moisture permeability according to JIS L1099B-1 method is in the range of 2000 to 10000 g / m ² · 24 hrs. The blood / virus barrier laminated fabric excellent in washing durability according to claim 1 or 2, wherein the outer fabric and the lining are the same woven or knitted fabric.