JP6587947B2 - Blood / virus barrier laminate fabric and method for producing the same - Google Patents

Description

  The present invention relates to a blood / virus barrier laminated fabric suitable for surgical gowns, aseptic gowns, or surgical drapes, and a method for producing the same.

  A blood / virus barrier laminated fabric in which a surface material, a resin film, and a lining material are laminated in this order is known. For example, Patent Document 1 describes a fabric in which a surface fabric fiber fabric, a dry film, a wet membrane, an adhesive layer, and a backing fiber fabric are laminated in this order. Patent Document 2 describes a fabric in which a surface material, a first adhesive layer, a microporous polytetrafluoroethylene film, a second adhesive layer, and a backing are laminated in this order.

JP 2014-65226 A JP 2014-121858 A

  The laminated fabrics described in Patent Documents 1 and 2 are not only excellent in initial blood / virus barrier properties but also excellent in durability against industrial washing and wet heat sterilization treatment. Therefore, it is suitably used for medical applications such as a surgical gown or a surgical drape. Furthermore, since these are also excellent in moisture permeability, a comfortable wearing feeling can be imparted to a surgical gown or the like.

  However, the laminated fabrics described in Patent Documents 1 and 2 require fabrics on the front and back sides, and the manufacturing process is complicated, so that the manufacturing cost may increase. Further, since the moisture permeability is exhibited in order to improve the wearing comfort, there is a risk that the blood / virus barrier may easily pass through repeated severe wearing, washing and sterilization. Further, the fabrics on the front and back sides give a thickness and a feeling of weight, and are not only inferior in peel resistance, but also have not fully met the recent demand for a lightweight and easy-to-handle laminated fabric. Here, when a fabric is used only on one side in order to develop lightness, the wear resistance is insufficient.

  The present invention eliminates the above-mentioned drawbacks of the prior art, is obtained by a simple operation, exhibits blood / virus barrier properties even after industrial washing and wet heat sterilization treatment, and has excellent peel resistance, only on one side. It is an object of the present invention to provide a laminated fabric having excellent wear resistance even when a fabric is employed.

    The inventors have laminated the adhesive layer having a specific thickness and composition, a waterproof film, and a protective film having a specific composition on the base fabric in this order. The inventors found for the first time that the above problem can be solved, and reached the present invention.

That is, the gist of the present invention is the following (1) to (6).
(1) A blood / virus barrier laminate fabric in which an adhesive layer, a waterproof membrane and a protective membrane are laminated in this order on one side of a base fabric containing a polyester synthetic fiber, wherein the adhesive layer is a polycarbonate fabric Including a curable adhesive containing a polyurethane resin as a main component and having a thickness of 15 to 50 μm, the waterproof film containing 100 parts by mass of a polycarbonate-based polyurethane resin and 3 to 30 parts by mass of crosslinked acrylic fine particles; and A blood / virus barrier laminate fabric having a thickness of 7 to 20 μm and the protective film comprising 100 parts by mass of a polycarbonate-based polyurethane resin and 8 to 35 parts by mass of an abrasion resistance improver.
(2) The blood / virus barrier laminate fabric according to (1), wherein the protective film has a thickness of 1 to 10 μm.
(3) The blood / virus barrier laminate according to (1) or (2), wherein the thickness of the base fabric is 40 to 100 μm and the thickness of the adhesive layer is 2/5 or less with respect to the thickness of the base fabric. Fabric.

(4) The determination of the artificial blood barrier property evaluated according to the ASTM F 1670-08B method after the 10-cycle treatment, with a continuous treatment of 10 industrial washings and 10 wet heat sterilization treatments as one cycle, (1) The blood / virus barrier laminated fabric according to any one of to (3).
(5) The determination of the virus barrier property evaluated according to the ASTM F 1671-07B method after passing 10 cycles after the continuous treatment of 10 times of industrial washing and 10 times of wet heat sterilization treatment is passed, (1) to The blood / virus barrier laminate fabric according to any one of (4).

(6) A method for producing a blood / virus barrier laminate fabric according to any one of (1) to (5), wherein the base fabric and the waterproof membrane are bonded together with the adhesive layer. Then, the method for producing a blood / virus barrier laminate fabric, wherein the protective film is formed on the waterproof film.

  In the laminated fabric of the present invention, an adhesive layer mainly composed of a polycarbonate-based polyurethane resin, a waterproof membrane and a protective membrane are laminated on the base fabric in this order, and the adhesive contained in the adhesive layer is a curable type. In the waterproof membrane, the laminated fabric of the present invention has a waterproof property, blood / virus barrier because it contains a specific proportion of cross-linked acrylic fine particles that are excellent in compatibility with the polycarbonate-based polyurethane resin and can contribute to an improvement in heat resistance. Property, durability of industrial washing and wet heat sterilization treatment, and texture, as well as improved adhesion and integration between the base fabric and the waterproof membrane, and remarkably excellent peel resistance. Furthermore, the laminated fabric of the present invention is excellent in surface appearance quality, touch feeling, and abrasion resistance because the protective film contains the wear resistance improver in a specific ratio. The laminated fabric of the present invention is suitable for medical clothes and materials in general, and is particularly preferable for reuse materials that are subjected to industrial washing and wet heat sterilization treatment under severe conditions such as surgical clothes, sterile clothes, or surgical drapes. Can be used.

It is a schematic diagram which illustrates the aspect of the blood and virus barrier property laminated fabric of this invention.

Hereinafter, the present invention will be described in detail.
The blood / virus barrier laminate fabric (laminate fabric) of the present invention has a base fabric containing a polyester-based synthetic fiber, an adhesive layer, a waterproof membrane and a protective membrane. Specifically, as shown in FIG. 1, the blood / virus barrier laminate fabric 1 of the present invention has an adhesive layer 3, a waterproof membrane 4 and a protective membrane 5 laminated in this order on one side of a base fabric 2. included. The adhesive layer, the waterproof film and the protective film contain a polycarbonate-based polyurethane resin as a main component.

[Base fabric]
The base fabric is not particularly limited as long as it has a strength that can withstand industrial washing and wet heat sterilization treatment, but because of its versatility and excellent heat and humidity resistance under high temperature and high pressure, the main composition is a polyester-based synthetic fiber. What is made into a fiber is preferable. For example, a base fabric having a polyester synthetic fiber mixing ratio of 90% by mass or more, preferably 100% by mass is preferable. Further, from the viewpoint of lightness and texture, the thickness of the base fabric is preferably 40 to 100 μm, and more preferably 50 to 90 μm.

  For the base fabric, synthetic fibers other than polyester-based synthetic fibers (for example, polyamides such as nylon 6 and nylon 66, polyacrylonitriles, or polyvinyl alcohol are used as long as they do not impair the durability of industrial washing and wet heat sterilization. System synthetic fibers) may be included. Examples of the form of the base fabric include woven fabric (for example, lip taffeta, twill, etc.), knitted fabric, or non-woven fabric. The base fabric may be subjected to known processing such as water repellent processing, calendar processing, antistatic processing, or antibacterial processing.

[Waterproof membrane]
The waterproof membrane contributes to waterproofness, contains a polycarbonate-based polyurethane resin as a main component, and further contains crosslinked acrylic fine particles.
(Polycarbonate polyurethane resin)
The polycarbonate-based polyurethane resin itself is excellent in heat resistance and hydrolysis resistance. Therefore, the laminated fabric of the present invention is excellent in durability against industrial washing and wet heat sterilization treatment.

  As the polycarbonate-based polyurethane resin, a polycarbonate diol and an organic polyisocyanate are used as raw materials. For example, a one-shot method (a method in which a polycarbonate diol, an organic polyisocyanate, and a chain extender are charged together and reacted), or a prepolymer method ( A known resin obtained by reacting a polycarbonate diol and an organic polyisocyanate in advance and then adding a chain extender) may be mentioned.

  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, or one or more diols such as 2,2-dialkyl-1,3-propanediol such as 2-pentyl, 2-propyl-1,3-propanediol, and By transesterification with one or more carbonic acid diesters, such as diaryl carbonates such as diphenyl carbonate and ditolyl carbonate, dialkyl carbonates such as dimethyl carbonate and diethyl carbonate, ethylene carbonate, and alkylene carbonates such as tetramethylene carbonate. It is those, and the like. Among these, in order to reduce crystallinity from the viewpoint of solubility in an organic solvent or viscosity as a molten resin, the diol mainly comprises 2,2-dialkyl-1,3-propanediol polycarbonate diol. From the viewpoint of durability against wet heat sterilization under high pressure, the diester carbonate is mainly composed of diaryl carbonate.

  Examples of the organic polyisocyanate include aliphatic diisocyanates such as tetramethylene diisocyanate and hexamethylene diisocyanate, alicyclic diisocyanates such as 1,4-cyclohexane diisocyanate and isophorone diisocyanate, xylylene diisocyanate, and 4,4′-diphenyl diisocyanate. And aromatic diisocyanates. Among these, those mainly composed of aromatic diisocyanate are preferable from the viewpoint of durability against wet heat sterilization under high pressure.

  Examples of the chain extender include 1,4-butanediol, 1,6-hexanediol, and ethylenediamine. These can be used alone or in combination of two or more.

  Since the polycarbonate-based polyurethane resin is excellent in blood barrier property and virus barrier property, and reusability when subjected to industrial washing and wet heat sterilization multiple times, it is preferable that the polycarbonate-based polyurethane resin does not have moisture permeability.

  The resin (resin other than the crosslinked acrylic fine particles) contained in the waterproof film may be only a polycarbonate-based polyurethane resin. Alternatively, other resins may be included in addition to the polycarbonate-based polyurethane resin as long as the compatibility with the crosslinked acrylic fine particles, heat resistance, hydrolysis resistance (moisture heat resistance), and the like are not affected. Examples of other resins include arbitrary resins such as polyether polyurethane resins, polyester polyurethane resins, and polyacrylic resins. From the viewpoint of moisture and heat resistance, the proportion of the polycarbonate-based polyurethane resin is preferably 70% by mass or more in the total resin constituting the waterproof film.

  The waterproof membrane has a thickness of 7 to 20 μm, preferably 9 to 18 μm. When the thickness of the waterproof membrane is 7 μm or more, the waterproof property and the durability of blood / virus barrier properties are excellent regardless of the thickness of the base fabric or the tissue. When the thickness of the waterproof membrane is 20 μm or less, the durability and texture of blood / virus barrier properties are excellent.

(Crosslinked acrylic fine particles)
Since the cross-linked acrylic fine particles are excellent in compatibility with the polycarbonate-based polyurethane resin, the durability of the entire waterproof membrane is improved. Examples of the crosslinked acrylic fine particles include fine particles obtained by polymerizing a polymerizable monomer mainly composed of acrylic acid esters or methacrylic acid esters and a crosslinkable monomer.

  Examples of the acrylate esters include methyl acrylate, ethyl acrylate, propyl acrylate, isopropyl acrylate, butyl acrylate, isobutyl acrylate, cyclohexyl acrylate, 2-ethylhexyl acrylate, and the like. Examples of methacrylic acid esters include methyl methacrylate, ethyl methacrylate, propyl methacrylate, isopropyl methacrylate, butyl methacrylate, and isobutyl methacrylate. These can be used alone or in combination.

  Examples of the crosslinking monomer include ethylene glycol acrylate, diethylene glycol acrylate, dipropylene glycol acrylate, trimethylol propane triacrylate, tetramethylol methane triacrylate, ethylene glycol methacrylate, diethylene glycol methacrylate, dipropylene glycol methacrylate, trimethylol propane trimethacrylate, Examples thereof include vinyl-based crosslinkable monomers such as tetramethylolmethane trimethacrylate, divinylbenzene and divinyladipate, and allyl group-containing crosslinkable monomers such as diallyl phthalate, allyl acrylate, allyl methacrylate and triallyl cyanurate.

  An example of a method for producing the crosslinked acrylic fine particles is as follows. The above-mentioned polymerizable monomer and crosslinkable monomer are mixed, and in the presence of a polymerization initiator such as inorganic or organic peroxide, a general suspension polymerization method, micro suspension polymerization method, emulsion polymerization method, or dispersion polymerization method is used. Etc. can be used for manufacturing.

  The shape of the crosslinked acrylic fine particles is not particularly limited, but is preferably spherical from the viewpoint of blood / virus barrier properties or waterproofness (water pressure resistance). The particle diameter of the crosslinked acrylic fine particles is preferably 0.1 to 20 μm, and more preferably 1 to 15 μm. When the thickness is 0.1 μm or more, the handleability is excellent, and it becomes easy to uniformly disperse in the waterproof film, and the effect of containing the crosslinked acrylic fine particles is more effectively expressed. When the thickness is 0.1 to 20 μm or less, the dispersibility in the waterproof film becomes better, and deterioration of the waterproof property can be further suppressed.

  The content of the crosslinked acrylic fine particles in the waterproof film is 3 to 30 parts by mass, preferably 6 to 25 parts by mass, with respect to 100 parts by mass of the polycarbonate polyurethane resin. When it is 3 parts by mass or more, the adhesiveness can be appropriately suppressed even in a resin system having excellent heat resistance and moist heat resistance, and having a strong tack feeling (adhesiveness), and handling properties and winding properties are improved. When it is 30 parts by mass or less, it is excellent in adhesion to the base fabric through the adhesive layer, so that integration becomes easy, and even when subjected to multi-cycle treatment of industrial washing and wet heat sterilization treatment, Excellent peelability and good texture. Furthermore, if it exceeds 30 parts by mass, agglomerates are likely to occur in the waterproofing membrane, and when a plurality of (multi-cycle) industrial washings and wet heat sterilization treatments are performed, the starting point of membrane damage is likely to occur under pressure. Therefore, the blood / virus barrier property may be inferior.

[Adhesive layer]
The adhesive layer is laminated by bonding the base fabric and the waterproof film. The adhesive contained in the adhesive layer is mainly composed of a polycarbonate-based polyurethane resin from the viewpoint of durability. The adhesive may be any of a hot-melt type adhesive or a solvent-type adhesive, but is curable because it has excellent adhesion, durability after industrial washing and wet heat sterilization, and peeling resistance. It is essential to be an adhesive. Preferable embodiments of the hot-melt adhesive include an adhesive that cures with moisture in the air (moisture curing type), or a two-component adhesive composed of a curing agent and a polycarbonate polyurethane resin.

  The adhesive layer only needs to be formed so as not to impair the adhesion between the base fabric and the waterproof membrane, may be formed partially, or may be formed on the entire surface, From the viewpoint of blood / virus barrier properties, it is preferably formed on the entire surface or almost the entire surface. For example, it is preferably formed in an area ratio of 40 to 100% with respect to the base fabric. When the adhesive layer is partially formed, examples of the shape thereof include a dot shape, a lattice shape, a checkered pattern, or a turtle shell shape.

  The thickness of the adhesive layer is 15 to 50 μm, and preferably 18 to 40 μm. When the thickness is 15 μm or more, the adhesive strength is sufficient, and the peel resistance is excellent. When the thickness is 50 μm or less, a laminated fabric having excellent durability for industrial washing and wet heat sterilization, and a good texture and excellent flexibility can be obtained.

  When the base fabric is thin (for example, about 40 to 100 μm), or when it is a taffeta using a polyethylene terephthalate multifilament having a fineness of 22 to 56 dtex as a warp or weft, or a lip taffeta, The thickness of the adhesive layer is preferably 2/5 or less, more preferably 1/3 or less with respect to the thickness of the base fabric. By setting the thickness of the adhesive layer in such a range, a lightweight fabric and excellent tear strength are obtained, and a laminated fabric having excellent weather resistance can be obtained by making the adhesive layer not excessively thick. In addition, it is difficult to receive a load between the base fabric and the adhesive layer, and as a result, partial peeling of the adhesive layer is suppressed even when subjected to multi-cycle industrial washing and wet heat sterilization treatment. And has excellent blood / virus barrier properties. In addition, the thickness of the base fabric as used in the field of this invention means the average thickness in the base fabric in which the resin film like an adhesive bond layer, a waterproof film, and a protective film is not formed.

[Protective film]
In the laminated fabric of the present invention, a protective film that contributes to improvement of waterproofness, peel resistance, wear resistance, and durability is formed on the waterproof film. The protective film contains, as a main component, a polycarbonate-based polyurethane resin that is excellent in heat resistance and moist heat resistance, and further contains an abrasion resistance improver. The wear resistance improver improves the wear resistance as well as improving the slipping feeling, touch feeling and mat feeling on the surface of the protective film. Specific examples of the wear resistance improver include fine particles of silica, alumina, titanium oxide, calcium carbide, crosslinked acrylic resin, crosslinked polystyrene resin, silicone resin, polytetrafluoroethylene, or the like, or N ^ε -lauroyl-L—. A flat powder such as lysine can be used. Among these, fine particles made of a cross-linked acrylic resin or polytetrafluoroethylene, or N ^ε -lauroyl-L-lysine is preferable, and fine particles made of a cross-linked acrylic resin or polytetrafluoroethylene are particularly preferable.

  The content of the wear resistance improver is 8 to 35 parts by weight, preferably 10 to 30 parts by weight, based on 100 parts by weight of the polycarbonate-based polyurethane resin contained in the protective film. Even if it is a case where multi-cycle industrial washing and wet heat sterilization processing are performed as it is 8-35 mass parts, it is excellent in abrasion resistance etc. Specifically, when the content of the wear resistance improver is 8 parts by mass or more, the durability and the wear resistance after multi-cycle treatment of industrial washing and wet heat sterilization treatment are excellent. On the other hand, when the amount is 35 parts by mass or less, the texture is not cured, and the application of a composition for forming a protective film (resin composition for forming a protective film) can suppress the occurrence of application stripes and the like. Excellent appearance quality.

  The thickness of the protective film is preferably 1 to 10 μm, and more preferably 3 to 7 μm. When the thickness of the protective film is 1 μm or more, waterproofness, peel resistance, abrasion resistance, heat resistance, and heat and humidity resistance can be exhibited. When the thickness of the protective film is 10 μm or less, there is an advantage that texture hardening can be suppressed even when the base fabric is a thin fabric, and the improvement in physical properties is not saturated.

[Method for producing laminated fabric]
An example of the method for producing the blood / virus barrier laminate fabric of the present invention as described above will be described below. Specifically, as a manufacturing method of the present invention, first, a base fabric and a waterproof film are prepared. And after bonding together a base fabric and a waterproof film through an adhesive bond layer, a protective film is formed on a waterproof film.

  A method for preparing the waterproof membrane is described below. The waterproof film is prepared using a waterproof film-forming resin composition (a composition containing a polycarbonate-based polyurethane resin, crosslinked acrylic fine particles, an organic solvent, and the like). When using a hot melt type resin in a resin composition for forming a waterproof film, a cross-linked acrylic fine particle is necessary so that a master batch is prepared by kneading cross-linked acrylic fine particles in the resin at a high concentration. According to the above, a resin composition for forming a waterproof film is prepared by mixing additional resin. Then, while adjusting the thickness using a T-die or the like, the resin composition is extruded into a film shape on the surface of a release material (release paper, release cloth, release film, etc.) to form a waterproof film. it can. Also, when using a solution-type resin in the resin composition for waterproofing film formation, the crosslinked acrylic fine particles are dispersed in a mixture in which the resin and the solvent are mixed, and the viscosity is adjusted to a desired range, so that the waterproof film forming resin is used. After obtaining the composition, it is applied on the release material so as to have a desired thickness, for example, using a comma coater, and dried at 80 to 150 ° C. for 1 to 5 minutes to form a waterproof film. (Dry coating method). The mold release material can be appropriately removed after the base fabric and the waterproof film are bonded or aged as described later.

  Next, an adhesive layer is formed on one surface of the base fabric or the waterproof membrane, or on the waterproof membrane-side surface of the waterproof membrane provided with a release material. For example, when using a hot roll type adhesive using a comma roll, gravure roll, rotary screen or the like, a resin composition for forming an adhesive layer (a composition containing an adhesive, a curing agent, an organic solvent, a catalyst, etc.) The product is applied to one side of the base fabric or waterproof membrane, and then cooled to form an adhesive layer. If a solution type adhesive is used, after applying the adhesive layer forming resin composition to one side of the base fabric or waterproof membrane, the adhesive layer is formed by drying at 80 to 150 ° C. for 1 to 5 minutes. To do. Alternatively, an adhesive layer is formed by the same method on the waterproof film of the waterproof film with a release material. Then, after bonding a base fabric and a waterproofing membrane through an adhesive bond layer, these are crimped | bonded or thermocompression bonded, it can be aged for 3 to 7 days at the temperature of normal temperature-40 degreeC. In addition, when the adhesive layer is formed directly on the surface of the waterproof membrane, not the surface of the base fabric, and the technique of bonding the base fabric and the waterproof membrane is employed, the adhesive layer forming resin composition has a low viscosity. However, there is an advantage that the coating does not leak from the gaps between the fibers constituting the base fabric and the coating is easy regardless of the unevenness of the surface of the base fabric.

  Next, a protective film is formed on the waterproof film. A resin composition for forming a protective film on a waterproof film (a composition containing a polycarbonate-based polyurethane resin, an abrasion resistance improver, an organic solvent, etc.) on a waterproof film by a known method suitable for thin film formation (for example, knife coating method). Is applied and dried at a temperature of 50 to 150 ° C. for 30 seconds to 5 minutes to form a protective film, whereby the laminated fabric of the present invention can be obtained. Then, you may perform the heat processing for 30 second-3 minutes, for example at the temperature of 150-180 degreeC.

  The laminated fabric of the present invention maintains excellent blood / virus barrier properties and peeling resistance even after repeated industrial washing and wet heat sterilization treatment, and further, texture, surface touch, wear resistance, and appearance It is also excellent in quality. Therefore, it is suitable for medical clothes and materials in general, and is particularly suitable for surgical garments, aseptic garments, or surgical drapes.

  Hereinafter, the present invention will be described in detail according to examples. The present invention is not limited to this example.

Example 1
Polyethylene terephthalate multifilament (84 dtex 72f) was used as the warp and weft, and a 2/2 twill fabric (warp density 170 / 2.54 cm, weft density 100 / 2.54 cm) was woven. This fabric was scoured at 80 ° C. for 20 minutes using 1 g / L of a scouring agent “Sunmol FL (trade name)” manufactured by Nikka Chemical Co., Ltd.

  The scoured fabric was padded with an aqueous dispersion (concentration: 6% by mass) of a fluorine-based water repellent emulsion, the wet pick-up rate was adjusted to 40%, and then dried. Furthermore, it was heat-treated at 170 ° C. for 40 seconds to obtain a base fabric (thickness 150 μm).

Next, a waterproofing film forming resin composition (viscosity: 5000 mPa · s / 25 ° C., solid content: 21%) having the following formulation 1 was prepared and naturally degassed over time, and then a release paper (manufactured by Lintec Corporation). , “130TPD”) was applied at a coating amount of 70 g / m ^{2 with} a comma coater. Subsequently, it was dried at 90 ° C. for 5 minutes to form a waterproof film having a thickness of 15 μm (containing 17 parts by mass of crosslinked acrylic fine particles with respect to 100 parts by mass of the polycarbonate-based polyurethane resin).

<Prescription 1>
Resamine CUS-1500 100 parts by mass (manufactured by Dainichi Seika Kogyo Co., Ltd., polycarbonate-based polyurethane resin having a solid content of 30% by mass)
5 parts by mass of MR-7GC (manufactured by Soken Chemical Co., Ltd., spherical crosslinked acrylic fine particles having an average particle diameter of 6 μm)
Toluene 45 parts by weight Methyl ethyl ketone 15 parts by weight

Subsequently, the base fabric and the waterproof membrane were bonded together.
Specifically, first, after preparing a resin composition for forming an adhesive layer (viscosity 3500 mPa · s / 25 ° C., solid content 52 mass%) of the following formulation 2, on the waterproof membrane surface of the waterproof membrane with release paper, The coating amount was 65 g / m ^{2 and} dried at 90 ° C. for 3 minutes. Thus, an adhesive layer having a thickness of 35 μm was formed (thickness of adhesive layer / thickness of base fabric = 7/30). After bonding the adhesive layer and the base fabric, thermocompression bonding was performed at a temperature of 80 ° C. and a pressure of 300 kPa, and aging was performed at 40 ° C. for 4 days to cure the adhesive layer.

<Prescription 2>
100 parts by mass of rack skin UD4233-1 (manufactured by Seiko Kasei Co., Ltd., polycarbonate-based polyurethane resin having a solid content of 60% by mass)
10 parts by mass of U-4000 (manufactured by Seiko Kasei Co., Ltd., isocyanate curing agent)
1 part by mass of UY-5 (manufactured by Seiko Kasei Co., Ltd., dioctyltin-based catalyst)
Methyl ethyl ketone 12 parts by mass N, N-dimethylformamide 12 parts by mass

After curing, the release paper is peeled off, a protective film-forming resin composition (viscosity 2500 mPa · s / 25 ° C., solid content 20% by mass) of the following formulation 3 is prepared, and the coating amount is applied to the waterproof film surface with a knife coater. Application was at 25 g / m ² . Next, by drying at 100 ° C. for 3 minutes, a protective film having a thickness of 5 μm (a white crystalline powder of N ^ε -lauroyl-L-lysine which is an abrasion resistance improver with respect to 100 parts by mass of the polycarbonate-based polyurethane resin) Body and KMR-3TA each containing 10 parts by mass). Subsequently, set processing was performed at 170 ° C. for 1 minute to obtain a blood / virus barrier laminate fabric of Example 1.

<Prescription 3>
Resamine CUS-1500 100 parts by mass (manufactured by Dainichi Seika Kogyo Co., Ltd., polycarbonate-based polyurethane resin having a solid content of 30% by mass)
Amihope LL 3 parts by mass (Ajinomoto Co., Inc., white crystalline powder of flaky N ^ε -lauroyl-L-lysine as an abrasion resistance improver)
3 parts by mass of KMR-3TA (manufactured by Soken Chemical Co., Ltd., spherical crosslinked acrylic fine particles having an average particle diameter of 3 μm as an abrasion resistance improver)
70 parts by mass of methyl ethyl ketone

(Example 2)
Polyethylene terephthalate multifilament (44 dtex 48f) was used as the warp and weft, and a plain texture fabric (warp density 160 / 2.54 cm, weft density 120 / 2.54 cm) was woven. Subsequently, this fabric was scoured at 80 ° C. for 20 minutes using 1 g / L of a scouring agent “Sun Mall FL (trade name)” manufactured by Nikka Chemical Co., Ltd. The scoured fabric was dyed at 130 ° C. for 30 minutes using 0.5% omf of a disperse dye “Dianix Blue UN-SE (trade name)” manufactured by Dystar Japan.

  The dyed fabric was padded with an aqueous dispersion (concentration: 7% by mass) of a fluorinated water repellent emulsion, the wet pick-up rate was adjusted to 30%, and then dried. Furthermore, the base fabric (thickness 70 micrometers) was obtained by heat-processing at 170 degreeC for 40 second (s).

Next, a waterproofing film forming resin composition (viscosity 4500 mPa · s / 25 ° C., solid content 20%) of the following formulation 4 was prepared and naturally degassed over time, and then a release paper (manufactured by Lintec Corporation). , “130TPD”) was applied with a comma coater at a coating amount of 50 g / m ² . Subsequently, it was dried at 90 ° C. for 5 minutes to form a waterproof film having a thickness of 11 μm (containing 10 parts by mass of crosslinked acrylic fine particles with respect to 100 parts by mass of the polycarbonate-based polyurethane resin).
<Prescription 4>
Resamine CUS-1500 100 parts by mass (manufactured by Dainichi Seika Kogyo Co., Ltd., polycarbonate-based polyurethane resin having a solid content of 30% by mass)
3 parts by mass of MR-2G (manufactured by Soken Chemical Co., Ltd., spherical crosslinked acrylic fine particles having an average particle diameter of 1 μm)
Toluene 50 parts by weight Methyl ethyl ketone 15 parts by weight

Subsequently, the base fabric and the waterproof membrane were bonded together.
First, a resin composition for forming an adhesive of the following formulation 5 (viscosity 2500 mPa · s / 25 ° C., solid content concentration 48 mass%) was prepared, and applied to a waterproof membrane surface of a waterproof membrane with a release paper by a comma coater in an amount of 55 g. / was applied using m ^2, drying of 3 minutes at 90 ° C., the thickness was formed adhesive layer of 20μm (thickness = 2/7 thick / base fabric of the adhesive layer). Thereafter, the base fabric and the waterproof membrane were laminated through the adhesive layer, thermocompression bonded at a temperature of 80 ° C. and a pressure of 300 kPa, and aged for 3 days at 40 ° C. to cure the adhesive layer.

<Prescription 5>
100 parts by mass of rack skin UD4233-1 (manufactured by Seiko Kasei Co., Ltd., polycarbonate-based polyurethane resin having a solid content of 60% by mass)
10 parts by mass of U-4000 (manufactured by Seiko Kasei Co., Ltd., isocyanate curing agent)
1 part by mass of UY-5 (manufactured by Seiko Kasei Co., Ltd., dioctyltin-based catalyst)
Methyl ethyl ketone 20 parts by mass N, N-dimethylformamide 15 parts by mass After the release paper was peeled after curing, a protective film (thickness 5 μm) was formed in the same manner as in Example 1, and the blood / virus barrier properties of Example 2 A laminated fabric was obtained.

(Example 3)
The protective film-forming resin composition of the prescription 3 was changed to a protective film-forming resin composition of the following prescription 6 (viscosity 4000 mPa · s / 25 ° C., solid content 21 mass%), and a protective film (polycarbonate) having a thickness of 6 μm The blood / virus barrier laminate fabric of Example 3 was obtained in the same manner as in Example 2 except that 27 parts by mass of polytetrafluoroethylene fine particles were contained per 100 parts by mass of the polyurethane resin. .

<Prescription 6>
Resamine CUS-1500 100 parts by mass (manufactured by Dainichi Seika Kogyo Co., Ltd., polycarbonate-based polyurethane resin having a solid content of 30% by mass)
8 parts by mass of Fluon L173JE (manufactured by Asahi Glass Co., Ltd., polytetrafluoroethylene fine particles having a primary particle diameter of 0.2 μm as an abrasion resistance improver)
Toluene 60 parts by weight Methyl ethyl ketone 20 parts by weight

(Example 4)
The laminated fabric of Example 4 was prepared in the same manner as in Example 3 except that the coating amount of the resin composition for forming a protective film in Formulation 6 was changed to 55 g / m ² and a protective film having a thickness of 12 μm was formed. Obtained.

(Comparative Example 1)
In Example 1, the coating amount of the resin composition for forming the adhesive layer in Formulation 2 was changed to 20 g / m ² and the thickness of the adhesive layer was changed to 11 μm. The laminated fabric of Example 1 was obtained.

(Comparative Example 2)
In Example 1, the coating amount of the resin composition for forming an adhesive layer in Formulation 2 was changed to 100 g / m ² and the thickness of the adhesive layer was changed to 55 μm. The laminated fabric of Example 2 was obtained.

(Comparative Example 3)
In Example 1, Comparative Example 3 was carried out in the same manner as in Example 1 except that the coating amount of the resin composition for forming a waterproof film in Formula 1 was changed to 20 g / m ² and the thickness of the waterproof film was changed to 5 μm. A laminated fabric was obtained.

(Comparative Example 4)
In Example 1, Comparative Example 4 was carried out in the same manner as in Example 1 except that the coating amount of the resin composition for forming a waterproof film in Formulation 1 was changed to 110 g / m ² and the thickness of the waterproof film was 25 μm. A laminated fabric was obtained.

(Comparative Example 5)
In Example 1, an attempt was made to form a waterproof film without using MR-7GC (crosslinked acrylic fine particles) in the resin composition for forming a waterproof film of Formulation 1. However, the tackiness was so strong that it could not be wound, so that it could not be subjected to the subsequent steps, and a laminated fabric could not be obtained.

(Comparative Example 6)
In Example 1, the content of MR-7GC (crosslinked acrylic fine particles) in the resin composition for forming a waterproof film of Formulation 1 was changed to 10 parts by mass, and the waterproof film (crosslinked acrylic with respect to 100 parts by mass of the polycarbonate polyurethane resin) was used. A laminated fabric of Comparative Example 6 was obtained in the same manner as in Example 1 except that 33 parts by mass of fine particles were formed.

(Comparative Example 7)
A laminated fabric of Comparative Example 7 was obtained in the same manner as in Example 2 except that the protective film was not formed in Example 2.

(Comparative Example 8)
In the resin composition for forming a protective film of Formula 6, the content of Fluon L173JE (antiwear improver) was changed to 2 parts by mass, and the antiwear agent was added to 100 parts by mass of the protective film (polycarbonate polyurethane resin). A laminated fabric of Comparative Example 8 was obtained in the same manner as in Example 2 except that (part by mass) was formed.

(Comparative Example 9)
In the protective film-forming resin composition of the prescription 6, the amount of Fluon L173JE was changed to 12 parts by mass to form a protective film (containing 40 parts by mass of an antiwear agent for 100 parts by mass of the polycarbonate-based polyurethane resin). A laminated fabric of Comparative Example 9 was obtained in the same manner as in Example 2 except that.

(Comparative Example 10)
A laminated fabric of Comparative Example 10 was obtained in the same manner as in Example 1 except that U-4000 (isocyanate-based curing agent) was not contained in the resin composition for forming an adhesive layer of Formulation 2.

About the laminated fabric obtained by the Example and the comparative example, the continuous process by the following method was performed and each physical property was measured or evaluated.
[Industrial laundry]
Using an industrial washing machine (manufactured by Daiei Kagaku Seiki Seisakusho Co., Ltd., model: WS-1SE), the standard washing conditions for one wash “73 ° C. × 20 minutes” were changed to the following conditions, did.
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 were added, and the pH value was adjusted to 10.
Process: Washing (73 ° C. × 200 minutes) → Washing water (40 ° C. × 30 minutes) → Overflow rinsing (normal temperature × 15 minutes) → Dehydration → Tumble drying (60 ° C. × 20 minutes)

[Moist heat sterilization]
Using a high-pressure steam sterilizer (“HV50 type” manufactured by Hirayama Seisakusho Co., Ltd.), the standard one-time sterilization condition “135 ° C. × 8 minutes” is changed to “135 ° C. × 80 minutes”, and 10 times Wet heat-sterilization treatment.

[Continuous processing]
The treatment was carried out with a continuous treatment of 10 times of the industrial washing and 10 times of the wet heat sterilization treatment as one cycle (10 times).

(1) Water pressure resistance (waterproof durability)
It measured based on JIS L 1092 (high water pressure method). In addition, waterproof durability evaluation was performed by the value of the water pressure resistance after 10 cycle processing.

(2) Abrasion resistance It evaluated according to JISL0849. The test piece was cut into a size of 15 cm in width and 30 cm in length, and mounted in parallel on a test piece base of a friction tester type 2, and four sides were fixed with gummed tape. A cotton cloth (No. 3 cotton cloth defined in JIS L 0803) was attached to the tip of the scraper, and the surface of the protective film was worn 500 times with a force of 1.96 N, and visually evaluated based on the following criteria.
A: Wear damage is hardly noticeable.
○: Abrasion damage is slightly noticeable.
(Triangle | delta): Although abrasion damage is carried out, the conspicuous damage is not recognized.
Δ-x: Damage is conspicuous.
X: Abrasion damage is large and damage to the extent that the film has a hole is recognized.

(3) Texture The obtained laminated fabric was evaluated by handling based on the following criteria.
A: Although it is a laminate product, the texture is extremely good.
○: The texture is good while being a laminated product.
Δ: The texture is normal as a laminate product.
Δ- ×: Slightly hard as a laminate product.
×: Hard as a laminated product, clearly inferior in texture

(4) Appearance quality The appearance of the protective film surface of the obtained laminated fabric was evaluated based on the following criteria.
○: Appearance quality is very good.
Δ: Appearance quality is good.
X: Application | coating stripe is conspicuous.

(5) Peeling status after continuous treatment (peeling resistance)
A continuous treatment of 10 cycles (also referred to as 10C) was performed, and visual judgment was made based on the following criteria to evaluate peeling resistance.
A: No peeling.
○: Partially peeled off.
Δ: Partially peeled off.
Δ-x: almost peeled off.
X: The entire surface was peeled off.

(6) Artificial blood barrier property It evaluated based on ASTMF1670-08B method. In the present invention, if the judgment after 10 cycles is acceptable, it can be sufficiently put into practical use and evaluated as preferable.

(7) Virus barrier property It evaluated based on ASTMF1671-07B method. In the present invention, if the determination after 10 cycles is acceptable, it can be sufficiently put into practical use and evaluated as preferable.

Table 1 summarizes the evaluations of the laminated fabrics obtained in the examples and comparative examples. In Table 1, “-” indicates that peeling occurred between the adhesive layer and the base fabric, and evaluation was impossible.

  As is apparent from Table 1, the laminated fabrics of the present invention obtained in Examples 1 to 4 have waterproofness, abrasion resistance, peel resistance, texture, appearance quality, and blood / virus barrier durability. All were good. In particular, the laminated fabrics of Example 2 and Example 3 were extremely excellent in texture because the thickness of the base fabric, waterproof membrane and adhesive layer was made thinner. The laminated fabrics of Examples 3 and 4 were remarkably excellent in abrasion resistance because the protective film was thickened and polytetrafluoroethylene fine particles were used as an abrasion resistance improver.

  The laminated fabric of Comparative Example 1 was completely peeled off during the 6C industrial washing because the thickness of the adhesive layer was too small. The laminated fabric of Comparative Example 2 was inferior in durability because of the excessive thickness of the adhesive layer, inferior in virus barrier properties after industrial washing and wet heat sterilization after 10 C, and inferior in texture.

  The laminated fabric of Comparative Example 3 was inferior in waterproofness because the waterproof membrane was too thin, and was also inferior in blood / virus barrier properties after industrial washing and wet heat sterilization after 10C. The laminated fabric of Comparative Example 4 was inferior in durability due to the excessive thickness of the waterproof membrane, inferior in virus barrier properties after industrial washing and wet heat sterilization after 10C, and inferior in texture.

  In the laminated fabric of Comparative Example 6, since the content of the crosslinked acrylic fine particles in the waterproof membrane was excessive, high water pressure resistance was achieved, but membrane breakage occurred due to the occurrence of aggregates, and after 10C The virus barrier property after industrial washing and wet heat sterilization was inferior, and the texture was also inferior.

  Since the laminated fabric of Comparative Example 7 was not formed with a protective film, it was inferior in waterproofness, abrasion resistance, peel resistance and durability, and artificial blood / virus barrier after industrial washing and wet heat sterilization after 10C Sex was rejected. The laminated fabric of Comparative Example 8 was inferior in wear resistance because the content of the antiwear improver in the protective film was too small, and also failed in artificial blood / virus barrier properties after 10C industrial washing and wet heat sterilization treatment In addition, the touch was poor.

  The laminated fabric of Comparative Example 9 passed the artificial laundry / virus barrier property after industrial washing and wet heat sterilization after 10 C, but the appearance quality was high because the content of the anti-wear improver in the protective film was excessive. , And the texture was inferior.

  Since the adhesive contained in the laminated fabric and the adhesive layer of Comparative Example 10 was not curable, it was inferior in durability and peeled off during the 2C industrial washing process, and could not be subjected to subsequent evaluation. It was.

1 Blood / Virus Barrier Laminated Fabric 2 Base Fabric 3 Adhesive Layer 4 Waterproof Film 5 Protective Film

Claims (6)

A blood / virus barrier laminate fabric in which an adhesive layer, a waterproof membrane and a protective membrane are laminated in this order on one side of a base fabric containing a polyester-based synthetic fiber,
The adhesive layer includes a curable adhesive containing a polycarbonate-based polyurethane resin as a main component, and has a thickness of 15 to 50 μm.
The waterproof membrane contains 100 parts by weight of a polycarbonate-based polyurethane resin and 3 to 30 parts by weight of crosslinked acrylic fine particles, and has a thickness of 7 to 20 μm.
The protective film contains 100 parts by mass of a polycarbonate-based polyurethane resin and 8 to 35 parts by mass of an abrasion resistance improver, and is a blood / virus barrier laminate fabric.   The blood / virus barrier laminate fabric according to claim 1, wherein the protective film has a thickness of 1 to 10 µm.   The blood / virus barrier according to claim 1 or 2, wherein the thickness of the base fabric is 40 to 100 µm, and the thickness of the adhesive layer is 2/5 or less with respect to the thickness of the base fabric. Laminate fabric.   The determination of the artificial blood barrier property evaluated according to the ASTM F 1670-08B method after 10 cycle treatments, with a continuous treatment of 10 industrial washings and 10 wet heat sterilization treatments as one cycle. Item 4. The blood / virus barrier laminate fabric according to any one of Items 1 to 3.   The continuous treatment of 10 industrial washings and 10 wet heat sterilization treatments as one cycle, the virus barrier property evaluation evaluated according to ASTM F 1671-07B method after 10 cycle treatment, is characterized in that it is characterized in that. 5. The blood / virus barrier laminate fabric according to any one of 1 to 4. A method for producing the blood / virus barrier laminate fabric according to any one of claims 1 to 5,
A method for producing a blood / virus barrier laminate fabric, comprising: bonding the base fabric and the waterproof membrane together with the adhesive layer; and forming the protective film on the waterproof membrane.