JPS6140183B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a stuffed fabric with excellent antistatic properties for use in clothing, bedding, interior decoration, etc. The stuffed fabric has a side fabric made of chemical fibers such as polyester, polyamide, acrylic, etc., natural fibers such as wool, cotton, etc., or a woven or knitted fabric using a mixture of these. It is manufactured by interposing cotton such as blended cotton, foamed resin, feathers, etc., and quilting or gluing as necessary, and has characteristics such as being lightweight, excellent in heat retention, and elastic. It is a material used in large quantities for cold weather clothing, bedding, interior decoration, etc. It is known that these fibers and resins used in stuffed fabrics tend to generate static electricity due to friction, and are particularly prone to becoming charged under low humidity conditions. In particular, filled fabrics are often used in low humidity environments during the winter, and they tend to cling due to electrostatic attraction, attract dirt and dust, causing stains, and emit light and generate noise due to discharge. It has been confirmed that various troubles such as discomfort may occur, and the discharge generated from electrically charged fabrics can become a source of ignition for flammable materials and cause failures in electronic equipment. Needless to say, prevention of static electricity is an important issue in petroleum-related industries, electronic industries, hospitals, etc. The most well-known method for preventing static electricity on textile products is to attach a surfactant to the fabric, and this method is the most commonly used because it is relatively easy to perform, but it has the disadvantage of poor washing resistance. There is. Furthermore, methods have been developed to blend surfactants and hydrophilic polymers during the production of chemical fibers.
Washing resistance is better compared to the above method, but
It has the disadvantage of being highly dependent on humidity and not exhibiting sufficient antistatic properties at low humidity. In order to eliminate these drawbacks, fabrics are made of conductive fibers that are made by forming a conductive film on the surface of thin metal wires, inorganic fibers such as carbon fibers, or chemical fibers by methods such as plating, coating, or vapor deposition. A method of directly mixing small amounts has been proposed. This method has characteristics such as low humidity dependence, excellent antistatic performance even under low humidity, and excellent washing resistance, but the conductive fibers used in this method are all black or black. It has a unique color tone close to black and is almost impossible to dye, so if the conductive fibers and the fabric are of different colors, the conductive fibers exposed on the fabric surface will stand out as black streaks and seriously spoil the aesthetic appearance of the fabric. Due to its drawbacks, it could only be used in special fields where antistatic performance takes precedence over aesthetics.
In order to eliminate this drawback, we have developed methods such as dyeing the fabric black or very dark colors to make the conductive fibers less noticeable, and inserting conductive fibers into the boundaries of the fabric's structure.
A method has also been proposed in which conductive fibers are used as embroidery threads to actively utilize the color tone of the conductive fibers, but the range of use is limited and this method is not versatile. The inventors of the present invention have conducted intensive studies to solve the above-mentioned drawbacks of the conventional technology without impairing the excellent antistatic properties of conductive fibers, and to provide a stuffed fabric with excellent antistatic properties. We have arrived at the present invention. That is, in the present invention, on the side of the stuffed fabric,
Use a fabric made of general organic non-conductive fibers that do not contain conductive fibers, and have an electrical resistance value of 1×10 ⁵ Ω/cm or more of 1×10 ¹³ on at least one side of the interface between the filling and the side fabric.
This is a stuffed fabric with excellent antistatic properties, which is made by arranging conductive fibers of Ω/cm or less so that the distance between adjacent conductive fibers is at most 10 cm or less. The present invention will be explained in more detail below. As conductive fibers, the above-mentioned inorganic fibers, fibers with conductive coatings, and chemical fibers in which conductive substances such as carbon, metals, and metal oxides are blended during manufacture are well-known, and they are effective in preventing static electricity. Both can be used from. However, inorganic fibers and fibers with conductive coatings have different physical properties (Young's modulus, specific gravity, heat shrinkability, elongation, fineness, etc.) from general organic non-conductive fibers, so they do not fit well with side fabrics or fillings. Therefore, there are drawbacks such as poor processability and loss of texture of the fabric, and it is difficult to provide a good stuffed fabric even when used in the present invention. The conductive fiber used in the present invention is preferably one in which conductive fine powder is blended during the manufacture of chemical fiber,
Particularly desirable are those having the following structure. That is, it is a composite yarn composed of a thermoplastic resin X component containing conductive fine powder such as carbon, metal, metal oxide, etc. and a resin Y component containing no conductive fine powder,
Either the X component or the Y component is divided into a plurality of parts and placed at a rotationally symmetrical position so as to be exposed on the fiber surface, and the other component occupies a continuous area including the center of the fiber cross section, and This is an organic conductive fiber in which both components are continuous in the fiber axis direction. The electric resistance value of the conductive fiber is within a preferable range required for preventing static electricity on the fabric by appropriately determining the proportion of the conductive fine powder in the X component during production. It can be controlled to 1×10 ⁵ Ω/cm or more and 1×10 ¹³ Ω/cm or less, and since it is manufactured mainly from thermoplastic resin, the fineness can be easily adjusted, and the fiber properties are on the same level as general organic fibers. It has certain characteristics. The electrical resistance value of the conductive fiber used in the present invention is 1×10 ⁵ Ω/cm or more, 1×10 ¹³ Ω/cm or more.
cm or less. If the electrical resistance value is less than 1 x 10 ⁵ Ω/cm, the fabric will have more conductivity than is required to prevent static electricity, so if the fabric generates a large amount of static electricity, it may give the wearer a tingling discharge stimulus. Therefore, it is not preferable, and if it exceeds 1×10 ¹³ Ω/cm, it becomes impossible to prevent static electricity. The single yarn fineness is preferably 20 deniers or less, which is preferably thinner than the fineness of the yarn used for the side fabric. It should be noted that the fineness of a yarn here refers to the fineness of a multifilament yarn or the converted fineness of a spun yarn, rather than the fineness of a single yarn constituting the yarn. If the single yarn fineness exceeds 20 deniers or the fineness of the yarn used for the side material, it is not preferable because the feel of the fabric will be impaired, although it depends on the condition of the filling. In the present invention, the conductive fibers are placed on at least one side of the interface between the side fabric and the filling (of course, they may be placed on both sides), but the side fabric and the filling are not limited in any way, and all conventionally used materials can be used. are available. The conductive fibers are arranged by any method on at least the plane of the interface between the side fabric and the filling so that the distance between adjacent conductive fibers is at most 10 cm or less. Examples of placement methods include, for example, scattering conductive fibers in the form of filaments or short fibers on the surface of a molded filling using an appropriate method, or distributing conductive fibers on general organic non-conductive fibers in advance. A method in which a web containing approximately 0.5% to 10% of cotton is uniformly mixed and the web is interposed between the side fabric and the filling, and conductive fibers or conductive fibers are mixed at 1% to 20%.
The side fabric and stuffing are made of 100% yarn containing 100% of the conductive fibers and general organic non-conductive fibers by a known method so that the distance between adjacent conductive fibers is 10 cm or less. There are several methods for intervening between the two, and the method is selected as appropriate in consideration of the application, workability, etc. It is difficult to limit the amount of conductive fibers to be mixed, as the basis weight of the lining and filling varies significantly depending on the application, but it is difficult to limit the amount of conductive fibers mixed in.
It is important that the diameter be less than 5 cm, especially less than 5 cm.
A range of 0.1 cm or more is preferable. When the distance between adjacent conductive fibers is at most 10 cm or more, the antistatic effect decreases, making it difficult to achieve the purpose of the present invention.
Furthermore, if the amount is less than 0.1 cm, the improvement in antistatic properties will be small compared to the amount of conductive fiber used, and it will be economically wasteful. The present invention has the above-described configuration, and due to this configuration, the present invention has the following excellent effects. (1) Since the conductive fibers are completely covered by the side fabric, they are not exposed and do not impair the aesthetics of the product in the slightest. (2) The antistatic effect of the present invention is based on the corona discharge effect of the conductive fibers interposed between the side fabric and the filling, and exhibits stable antistatic performance even under low humidity. (3) The side fabric and filling used previously can be used as is. EXAMPLES Next, the present invention will be specifically explained with reference to Examples, but the present invention is not limited thereto. In addition, the electrical resistance value of the conductive fiber and the antistatic performance of the stuffed fabric in the examples were evaluated by the following method. (b) Electrical resistance value of conductive fiber Wrap 1 cm of both ends of a conductive fiber cut into 12 cm pieces with aluminum foil, hold this with a clip,
The current (I) when a voltage of 1000V was applied was measured, and the electrical resistance value per cm was determined using the following formula. R=1000/10I (Ω/cm) (b) Charging property of fabric Sample a 30cm x 30cm test piece from any part of the fabric, dry it completely, and then condition it in an atmosphere of 20℃ x 30% RH for more than 24 hours. Spread the test piece on a grounded metal plate covered with an acrylic knitted cloth in the same atmosphere, rub it strongly with the acrylic knitted cloth 10 times at a rate of 1 time/1 second, and immediately put the test piece into a Faraday cage. , measure the charge weight of the test piece and convert it to the charge density per cm. Example 1 80 parts of nylon 6 chips and 20 parts of acetylene black
After mixing with a melting stirrer and cooling, it is made into chips and carbon black dispersed nylon 6 chips (hereinafter referred to as X
That's what it means. ) was manufactured. Next, a normal nylon spinning and drawing method was carried out, with X being a small area divided into three parts, and nylon 6 chips (hereinafter referred to as Y) containing no carbon black being a continuous area including the center, with a weight ratio of X:Y of 1:2. Fineness 30d/4f, strength
A conductive filament yarn having an electrical resistance of 3.4 g/d, an elongation of 51%, a boiling water shrinkage rate of 11.2%, and an electrical resistance value of 6.8×10 ⁶ Ω/cm was produced. Polyester cotton 6d x 50mm as filling
was carded by a conventional method to produce a polyester web a-1 having a basis weight of 40 g/m ² . The conductive filament yarn is placed on one side of the web in a length of 3 cm in the warp direction.
The webs arranged at intervals were designated as a-2, and the webs arranged at 15 cm intervals were designated as a-3. Both the warp and weft are polyester 75d/
30f, boiling water shrinkage rate 7.4%, warp density 106/in,
Fabric b-1 with a weft density of 87 threads/in and a plain weave texture, and fabric b-2 which is the same as b-1 except that the conductive filament yarn is mixed in the warp at an interval of 1 thread/3 cm.
Fabrics b-1 and b-2 were refined and dyed using conventional methods. Incidentally, the dyeing was greenish. Next, quilt fabrics A, B, C, and D were produced using the combinations of batting and side fabric shown in Table 1 in a conventional manner, and the antistatic performance of the fabrics was measured. The results are shown in Table 1.

[Table] ○: Conductive fibers are not visible.
×: Conductive fibers are visible.
Washing conditions Washing machine: Automatic reversing whirlpool washing machine (Matsushita Electric Industry Co., Ltd.)
NA-5000 type) Detergent: Zabu Comparatively, it had excellent antistatic performance, and the appearance showed that conductive filament yarn was not mixed in at all, and it had the same quality as Comparative Product C. On the other hand, Comparative product D made by the conventional technology in which conductive filament yarn is mixed in the side material has the same level of antistatic performance as the product of the present invention, but the striped pattern is particularly problematic because the conductive filament yarn looks like a striped pattern. It cannot be used for anything other than . Furthermore, Comparative Product D was found to have a drawback in that puckering occurred on the side material b-2 when washed.
This is thought to be due to the difference in heat shrinkage between the conductive filament yarn and the polyester, and when antistatic is performed using this method, the heat shrinkage of the conductive filament yarn and the yarn constituting the fabric are approximately the same. It is estimated that it is necessary to control the level. Comparative product B, in which the conditions for mixing conductive fibers are outside the range of the present invention, has the same external quality as the present invention product, but has insufficient antistatic performance.

Claims (1)

[Scope of Claims] 1. A stuffed fabric composed of a side fabric and a stuffing, which has an electrical resistance value of 1×10 ⁵ Ω/cm or more 1×
10 ¹³ Conductive fibers or yarns containing conductive fibers with a single yarn fineness of 20 denier or less and 10 13 Ω/cm or less are placed on at least one side of the interface between the side material and the padding, and adjacent conductive fibers or conductive fibers are used. Maximum thread spacing including
A stuffed fabric with excellent antistatic properties that is arranged so that the length is 10 cm or less. 2 Conductive fibers are conductive fibers in which conductive substances such as carbon, metals, metal oxides, etc. are blended into part or all of the cross section of the fibers and continuously along the fiber axis during the manufacture of chemical fibers. The stuffed fabric according to claim 1, which is a fiber.