JP2006168304A - Moisture-permeable waterproof cloth and protective garment for cardiac pacemaker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a moisture-permeable waterproof cloth having an electromagnetic wave shield capacity and soft characteristics and a protective garment for a cardiac pacemaker made by using the moisture-permeable waterproof cloth. <P>SOLUTION: A polymer coat layer A having a thickness of 3 to 100 μm and a metallic coat layer having a thickness of 1.0×10<SP>-6</SP>to 1.5×10<SP>-4</SP>mm are laminated in this order on a base cloth of a fibrous material. If necessary, a polymer coat layer B having a thickness of 3 to 100 μm is further laminated on it. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a moisture-permeable and waterproof fabric having electromagnetic shielding properties and softness, and a garment for protecting a cardiac pacemaker using the moisture-permeable and waterproof fabric.

  Conventionally, as materials for outdoor clothing, ski wear, and the like, many moisture permeable and waterproof fabrics in which polyurethane or polyester elastomer is laminated on a woven or knitted fabric have been proposed (for example, Patent Document 1, Patent Document 2, Patent Document 3, (See Patent Document 4). Wearing clothing obtained using such a moisture-permeable and waterproof fabric does not stuff up even when sweating and provides excellent wearing comfort.

On the other hand, in recent years, the number of people who use heart pacemakers has increased due to an aging society, and proposals for clothing that protects the heart pacemaker from external electromagnetic waves such as mobile phones are desired.
However, as conventional electromagnetic wave shielding materials, those in which the fibers constituting the cloth are subjected to metal plating, or those in which an electromagnetic wave shielding layer is formed on the surface of the cloth (for example, see Patent Document 5 and Patent Document 6) are proposed. However, in order to obtain sufficient electromagnetic shielding properties, it is necessary to increase the thickness of the metal plating or electromagnetic shielding layer, which is not satisfactory in terms of softness. Moreover, there has not been much proposed what has moisture permeability and waterproofness.

JP 2000-290878 A JP-A-5-214673 JP-A-11-209506 JP 2004-315817 A JP 2003-236996 A JP 2003-8282 A

  The present invention has been made in view of the above-described background, and an object of the present invention is to provide a moisture-permeable waterproof fabric having electromagnetic shielding properties and softness, and a heart pacemaker protective clothing using the moisture-permeable waterproof fabric. There is to do.

  As a result of intensive studies to achieve the above object, the present inventors have laminated a polymer film layer having moisture permeability and waterproof properties on a base fabric made of a fiber material, and vacuum deposition method or sputtering method on the polymer film layer. It was found that by laminating a thin metal film layer, a moisture-permeable and waterproof fabric having excellent electromagnetic shielding properties can be obtained without impairing moisture permeability and softness, and the present invention was conceived by further earnest studies. .

Thus, according to the present invention, “a polymer coating layer A having a thickness of 3 to 100 μm and a metal coating layer having a thickness of 1.0 × 10 ^{−6 to} 1.5 × 10 ⁻⁴ mm are formed on a base fabric made of a fiber material. Are laminated in this order. ”Is provided.

  At that time, it is preferable that a polymer film layer B having a thickness of 3 to 100 μm is further laminated on the metal film layer. Further, the polymer film layer A and / or the polymer film layer B are preferably formed of a film made of a polyurethane polymer or a film made of a polyester polymer. On the other hand, the metal film layer is preferably made of any one metal selected from the group consisting of aluminum, copper, nickel, silver, chromium, and titanium. Such a metal film layer is preferably formed by vacuum deposition or sputtering.

  In the moisture-permeable and waterproof fabric of the present invention, the base fabric is preferably a woven fabric made of polyester fibers. The single yarn fineness of the fibers constituting the base fabric is preferably in the range of 0.1 to 0.9 dtex.

In the moisture-permeable and waterproof fabric of the present invention, the electromagnetic wave shielding characteristics are preferably 30 dB or more in the frequency band of 80 to 1000 MHz. Moreover, it is preferable that the bending resistance measured by JIS L 1096 6.19 cantilever method exists in the range of 3-20 mm. Moreover, it is preferable that the water pressure resistance measured by the JIS L 1092 B method is in the range of 1000 to 40000 mm. Further, it is preferable moisture permeability measured by JIS L 1099 B method is in the range of 2500~15000g ^/ m 2 ^/ 24hr.
Moreover, according to this invention, the clothing for heart pacemaker protection formed using the said moisture-permeable waterproof fabric is provided.

  ADVANTAGE OF THE INVENTION According to this invention, the moisture-permeable waterproof fabric which has electromagnetic wave shielding property and softness, and the clothing for heart pacemaker protection which uses this moisture-permeable waterproof fabric are provided.

Hereinafter, embodiments of the present invention will be described in detail.
First, a polymer film layer A having a thickness of 3 to 100 μm (preferably 5 to 15 μm) is laminated on at least one surface of a base fabric made of a fiber material. If the thickness is less than 3 μm, the film strength is lowered and sufficient waterproofness cannot be obtained, which is not preferable. On the other hand, if the thickness is larger than 100 μm, the softness of the moisture-permeable and waterproof fabric is lowered, which is not preferable.

  The polymer forming the polymer film layer A may be a normal polymer for moisture permeable and waterproof. Examples include polyurethane polymers, polyacrylic polymers, polyamide polymers, polyester polymers, polyvinyl chloride polymers, polyfluorine polymers, and the like. Among them, polyesters such as polyurethane polymers and polyether ester elastomers composed of polyalkylene glycol residues, alkylene glycol residues, and dicarboxylic acid residues as disclosed in JP-A-2000-290878. A polymer is preferred. The film structure may be either a microporous film or a nonporous film.

Nonporous coating on the _polymer, -COOM, -NH 2, -CN, -OH, when a polymer containing a hydrophilic group such as -NHCONH ₂ is film-formed by a dry coagulation, Toru This hydrophilic group Wet property is obtained, and since it is a nonporous film, excellent waterproof properties can be obtained.

  On the other hand, as a method for obtaining a microporous film, as disclosed in JP-A No. 2004-315817 and JP-A No. 11-209596, a mixed solution comprising a polymer, an organic solvent and water is used as a base material. A method of evaporating the organic solvent and water after casting is exemplified.

  As a method of laminating the polymer film layer A on a base fabric made of a fiber material, (1) polyurethane polymer solution (for example, Chris Bon KH-25 manufactured by Dainippon Ink Industries, Ltd. and Kawaken Fine Chemical Co., Ltd.) Mixture with alkylate D, Dainippon Ink Industries Co., Ltd., Chrisbon KH-25CAT, etc.) and polyester polymer solution (for example, dimethyl terephthalate, ethylene glycol, tetramethylene glycol, polyethylene glycol, and catalyst) After a film is obtained from a polymer solution such as a solution, an adhesive (for example, a mixed solution of Chris Bon AD865 manufactured by Dainippon Ink Industries, Ltd. and Accel T, manufactured by Dainippon Ink Industries, Ltd.) A method of bonding to a base fabric using Nippon Ink Industry Co., Ltd. (Tyforce H-1040, etc.), (2) And a method of directly coating the polymer solution into the base fabric in a coating method are exemplified. Especially, the method of adhering the former film to a base fabric is preferable because a thin film can provide excellent moisture permeability and waterproofness.

The moisture permeable and waterproof fabric of the present invention has a thickness of 1.0 × 10 ^{−6 to} 1.5 × 10 ⁻⁴ mm (preferably 5 × 10 ^{−4 to} 5 × 10 ⁻⁾ on the polymer film layer A. ⁵ mm) metal film layer is laminated. When the thickness is smaller than 1.0 × 10 ⁻⁶ mm, it is not preferable because sufficient electromagnetic shielding properties cannot be obtained. Conversely, when the thickness is larger than 1.5 × 10 ⁻⁴ mm, the softness and moisture permeability are impaired, which is not preferable.

As the metal for forming such a metal film layer, aluminum, copper, nickel, silver, chromium, titanium and the like are suitably exemplified in order to obtain excellent electromagnetic wave shielding properties.
As a method for forming the metal film layer, a normal vacuum vapor deposition method or sputtering method is preferable for obtaining the metal film layer having the above thickness.

  In the moisture-permeable and waterproof fabric of the present invention, the metal film layer may be exposed on the surface, and further, a protective layer having a thickness of 3 to 100 μm (preferably 5 to 15 μm). It is preferable that the polymer film layer B is laminated. The polymer that forms the polymer film layer B may be the same as the polymer that forms the polymer film layer A. At that time, the polymer forming the polymer coating layer B and the polymer forming the polymer coating layer A may be different, but the same is preferable because the manufacturing process can be simplified.

  In the moisture-permeable and waterproof fabric of the present invention, the polymer coating layer A and the metal coating layer may be laminated on either the front or back of the base fabric. Although it may be laminated | stacked on both surfaces of the front and back, it is preferable that it is laminated | stacked only on one surface at the point of soft property.

  In the moisture-permeable and waterproof fabric of the present invention, it is important that the polymer coating layer A and the metal coating layer are laminated in this order on the base fabric. For example, when the polymer film layer A is laminated on the base fabric on which the metal film layer is laminated, the metal adheres to the surface of the single fiber, so there is no metal in the interfiber gap, Electromagnetic shielding properties are impaired, which is not preferable.

  The fiber material constituting the base fabric of the moisture permeable waterproof fabric of the present invention may be normal fibers such as cotton, wool, hemp, viscose rayon fiber, polyester fiber, nylon fiber, polyolefin fiber, cellulose acetate fiber, Polyester fibers are most preferable for obtaining excellent moisture permeability and waterproofness.

  As the polyester fiber here, terephthalic acid is the main dicarboxylic acid component, and at least one glycol, preferably at least one alkylene glycol selected from ethylene glycol, trimethylene glycol, tetramethylene glycol, etc., is the main glycol component. A polyester fiber is exemplified. The polyester may be copolymerized and / or blended with a third component as necessary. Furthermore, various stabilizers, ultraviolet absorbers, thickening and branching agents, matting agents, coloring agents, and other various improving agents may be blended as necessary.

  The fiber form may be either a long fiber or a short fiber, but a long fiber (multifilament) is preferable in order to obtain excellent moisture permeability and waterproofness. Moreover, such multifilaments may be subjected to false twisting, or air processing such as interlacing or taslan. Furthermore, twisted yarn may be applied as necessary, but non-twisted yarn is preferable because it improves waterproofness.

  The total fineness, the single yarn fineness, and the number of filaments of the multifilament are not particularly limited, but in order to obtain excellent moisture permeability and waterproof properties and softness, the total fineness is 40 to 110 dtex, and the single yarn fineness is 0.2 to 0. It is preferable that the range is 9 dtex (more preferably 0.3 to 0.6 dtex) and the number of filaments is 50 to 300 (more preferably 100 to 200).

  The structure of the base fabric is not particularly limited and may be a normal woven or knitted structure. However, a plain texture is particularly preferable in terms of waterproofness. The density of the woven fabric is suitably in the range of warp density 60 to 250 / 2.54 cm and weft density 60 to 250 / 2.54 cm.

The moisture-permeable and waterproof fabric of the present invention has excellent electromagnetic shielding properties because the metal film layer is formed on the polymer film layer as described above. At the same time, since the thickness of the metal film layer is as thin as 1.0 × 10 ^{−6 to} 1.5 × 10 ⁻⁴ mm, moisture permeability and softness are not impaired. The reason why the moisture permeability is not impaired has not yet been clarified, but it is estimated that very small pores are formed so as to obtain the moisture permeability.

In the moisture-permeable and waterproof fabric of the present invention, it is practically preferable that the electromagnetic wave shielding property is 30 dB or more in the frequency band of 80 to 1000 MHz by the KEC method. Moreover, as softness | flexibility, it is preferable to exist in the range of 3-20 mm in the bending resistance measured by the JISL10966.19 cantilever method. The water resistance is preferably in the range of 1000 to 40000 mm in terms of water pressure measured by the JIS L 1092 B method. The moisture permeability is preferably in the moisture permeability measured by JIS L 1099 B method is in the range of 2500~15000g ^/ m 2 ^/ 24hr. Such electromagnetic wave shielding properties, soft properties, and moisture permeability and waterproof properties can be easily obtained by appropriately selecting the thicknesses of the polymer film layer and the metal film layer within the above ranges.
The moisture permeable and waterproof fabric of the present invention can be subjected to other functional processing such as flame retardant processing, dark color processing, heat storage and warming, and negative ion generator processing.

  Next, the cardiac pacemaker protective clothing of the present invention is a clothing made of the moisture-permeable and waterproof fabric. The apparel may be composed only of a moisture-permeable and waterproof fabric, or the moisture-permeable and waterproof fabric is disposed only in the vicinity of the cardiac pacemaker, and the other portions are ordinary fabrics (for example, polyester fiber, nylon) A woven or knitted fabric made of ordinary clothing fibers such as fibers, acrylic fibers, and natural fibers) may be disposed. The shape of the clothes is not particularly limited, and may be any one such as a sweater, a jumper, or inner wear.

  The cardiac pacemaker protective apparel of the present invention is excellent in electromagnetic wave shielding properties, softness, and moisture permeability and waterproofness, and thus can be comfortably used in rainy weather or sweating, and is suitable as outdoor wear or ski wear.

  In addition, according to the fabric of the present invention having an electromagnetic shielding property and a moisture-permeable waterproof function, a so-called “wearable computer” fabric in which various electronic control devices such as a computer and a medicine injection system are worn inside the garment can be realized. , Can be deployed in large special demand applications (health, industrial, special environment, military demand, etc.).

Next, examples of the present invention will be described in detail, but the present invention is not limited thereto. In addition, each measurement item in an Example was measured with the following method.
<Electromagnetic wave shielding characteristics>
Before washing and after washing 5 times specified by JIS L 0217 103 method, it was measured in the frequency band of 80 to 1000 MHz by KEC method. The average value was calculated with n = 5.
<Softness>
JIS L 1096 6.19 The bending resistance (mm) was measured by the cantilever method.
<Water pressure resistance>
It was measured by the JIS L 1092 B method.
<Moisture permeability>
It was measured by JIS L 1099 B method.
<Stripping strength>
A rectangular sample having a length of 8 cm and a width of 2.54 cm is cut in the warp direction and the weft direction from the fabric to which the film is bonded, and about 1 cm of the film at one end on the short side of the sample is peeled off from the base fabric. The peeled ends were grasped with chucks, and the peel strength when the chuck interval was widened at an extension rate of 200% / min was measured, and expressed as the strength per width: 2.54 cm. In addition, it measured by n number 5 each about the longitudinal direction and the weft direction, and calculated the average value.

[Example 1]
A normal polyethylene terephthalate multifilament with a total fineness of 55 dtex / 144 fil is used as the warp, and a normal polyethylene terephthalate multifilament with a total fineness of 55 dtex / 144 fil is used as the weft. After weaving a weft density of 119 yarns / 2.54 cm), refining at 80 ° C. and then carrying out a normal dyeing process at 130 ° C. for 30 minutes to obtain a base fabric (warp density of 143 yarns / 2.54 cm, weft density of 135 yarns / 2. 54 cm) was obtained.

Next, an adhesive (Taiforce H-1040 manufactured by Dainippon Ink Industries Co., Ltd. and Dainippon Ink Industries Co., Ltd.) was applied to one surface of the base fabric at an adhesion amount of 5 g / m ^2. Krisbon KH-25CAT (polyurethane polymer) manufactured by Kogyo Co., Ltd. was bonded in advance to a film prepared by drying for 1 minute at a temperature of 130 ° C. for a film thickness of 10 μm, and then aged for 24 hours in a thermostatic chamber at a temperature of 40 ° C. Went.

Subsequently, aluminum is vapor-deposited on the surface of the film by a vacuum deposition method (vacuum degree 1.2 × 10 ⁻⁴ Pa, speed 100 m / min) to form a metal film layer having a thickness of 7 × 10 ⁻⁵ mm, A moisture permeable waterproof fabric was obtained.

In the resulting moisture-permeable waterproof fabric, electromagnetic wave shielding property, washing before 30dB or more, washing 5 times after 10～20DB, softness is 10 mm, water pressure resistance 15000mmH ₂ O, moisture permeability 5200g ^/ m 2 ^/ 24Hrs, The peel strength was 11.1 N / 2.54 cm in the warp direction and 11.8 N / 2.54 cm in the weft direction.

[Example 2]
A film (thickness: 10 μm) made of a polyurethane polymer was prepared using a mixed solution of Chris Bon KH-25 manufactured by Dainippon Ink Industries, Ltd. and alkylate D manufactured by Kawaken Fine Chemical Co., Ltd.

Next, an adhesive (mixed solution of Crisbon AD865 manufactured by Dainippon Ink Industries Co., Ltd. and Accel T manufactured by Dainippon Ink Industries Co., Ltd.) was applied to the same base fabric as in Example 1 at an adhesion amount of 5 g / m ^2. The film was bonded.

Next, aluminum is deposited on the surface of the film by a vacuum deposition method (degree of vacuum: 9.0 × 10 ⁻⁵ Pa, speed: 100 m / min) to form a metal film layer having a thickness of 1.2 × 10 ⁻⁴ mm. did.

Next, an adhesive (Taiforce H-1040 manufactured by Dainippon Ink Industries, Ltd. and Dainippon Ink Industries Co., Ltd.) was applied to the surface of the metal film layer at an adhesion amount of 5 g / m ² , and the above Dainippon A film (thickness 10 μm) made of a mixed solution of Chris Bon KH-25 manufactured by Ink Industries Co., Ltd. and alkylate D manufactured by Kawaken Fine Chemical Co., Ltd. was bonded, and then aged for 24 hours in a temperature-controlled room at 40 ° C. Went.

In the resulting moisture-permeable waterproof fabric, electromagnetic wave shielding property, washing before 30dB or more, washing 5 times after more than 30dB, softness is 12 mm, water pressure resistance 25000mmH ₂ O, moisture permeability 4000g ^/ m 2 ^/ 24Hrs, peeling The strength was 12.5 N / 2.54 cm in the warp direction and 12.5 N / 2.54 cm in the weft direction.

  ADVANTAGE OF THE INVENTION According to this invention, the moisture permeable waterproof fabric which has electromagnetic shielding property and softness, and the clothing for heart pacemaker protection which uses this moisture permeable waterproof fabric are provided, The industrial value is very large. Furthermore, according to the fabric of the present invention having an electromagnetic shielding property and a moisture-permeable waterproof function, a so-called “wearable computer” fabric in which various electronic control devices, for example, a computer and a medicine injection system are worn inside the garment is possible. Therefore, it can be developed for large special demand applications (health, industrial, special environment, military demand, etc.).

Claims (13)

A polymer coating layer A having a thickness of 3 to 100 μm and a metal coating layer having a thickness of 1.0 × 10 ^{−6 to} 1.5 × 10 ⁻⁴ mm are laminated in this order on a base fabric made of a fiber material. A moisture-permeable waterproof fabric characterized by   The moisture-permeable and waterproof fabric according to claim 1, wherein a polymer film layer B having a thickness of 3 to 100 µm is further laminated on the metal film layer.   The moisture-permeable and waterproof fabric according to claim 1 or 2, wherein the polymer film layer A and / or the polymer film layer B are formed of a film made of a polyurethane polymer.   The moisture-permeable and waterproof fabric according to claim 1 or 2, wherein the polymer coating layer A and / or the polymer coating layer B is formed of a film made of a polyester polymer.   The moisture-permeable waterproof fabric according to any one of claims 1 to 4, wherein the metal film layer is made of any one metal selected from the group consisting of aluminum, copper, nickel, silver, chromium, and titanium.   The moisture-permeable waterproof fabric according to any one of claims 1 to 5, wherein the metal film layer is formed by a vacuum deposition method or a sputtering method.   The moisture-permeable and waterproof fabric according to any one of claims 1 to 6, wherein the base fabric is a woven fabric made of polyester fibers.   The moisture-permeable and waterproof fabric according to any one of claims 1 to 7, wherein the single yarn fineness of the fibers constituting the base fabric is in the range of 0.1 to 0.9 dtex.   The moisture-permeable and waterproof fabric according to any one of claims 1 to 8, wherein the electromagnetic wave shielding property is 30 dB or more in a frequency band of 80 to 1000 MHz.   JIS L 1096 6.19 The moisture-permeable waterproof fabric in any one of Claims 1-9 whose bending resistance measured by the cantilever method exists in the range of 3-20 mm.   The moisture-permeable and waterproof fabric according to any one of claims 1 to 10, wherein the water pressure resistance measured by the JIS L 1092 B method is in the range of 1000 to 40000 mm. Moisture permeability measured by JIS L 1099 B method is in the range of 2500~15000g ^/ m 2 ^/ 24hr, moisture-permeable waterproof fabric according to any one of claims 1 to 11.   A clothing for protecting a cardiac pacemaker, comprising the moisture-permeable and waterproof fabric according to any one of claims 1 to 12.