JPS6214662B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for preventing static electricity on woven or knitted fabrics made of long fiber yarns of polyester synthetic fibers.

Synthetic fibers such as polyester, polyamide, and polyacrylonitrile are more easily charged than natural fibers, and it is difficult for electricity to escape. When fibers are charged with static electricity, various problems occur. During textile processing processes such as spinning, weaving, weaving, and dyeing, as well as cutting and sewing processes, electrically charged fibers repel or attract each other, causing problems with the work, and there are also many problems caused by static electricity when using textile products. Be looked at. For example, electrically charged clothing clings to the human body and other clothing, and when taken off, it makes electrical discharges, crackling sounds, and hair stands on end, causing discomfort.Also, it attracts dust from the atmosphere, making it easy to get dirty and difficult to remove. be. Furthermore, depending on the work environment, problems such as ignition or explosion due to electrostatic charge on textile products are becoming a major problem.

Theoretically, there are two ways to prevent static electricity from forming on fibers: (1) suppress the generation of static electricity by reducing friction;

(2) Reduce the accumulation of static electricity by reducing electrical resistance.

(3) Facilitate air discharge.

(4) Neutralize the generated charge.

(5) Leak through earth.

There are many methods that can be considered, but methods (1) and (2) are practically effective, and the former is mainly applied in the fiber manufacturing and processing stages, while the latter is applied to the wearing surface. This is a useful method. Specific methods for accomplishing these include (1) adding an antistatic substance to the surface of the fibers, (2) modifying the fibers, and (3) mixing conductive fibers.

The present invention attempts to prevent electrification of woven or knitted fabrics by mixedly using conductive fibers among these various antistatic methods.

The conventional method of mixing conductive fibers has a low dependence on humidity for antistatic performance and is excellent in durability, but the mixing of different types of fibers changes the appearance of the fabric and is suitable for special work clothes that require particular safety. It has only been put to practical use in a specific range of applications, such as carpets. In the case of long-fiber woven or knitted fabrics, it goes without saying that it is desirable that the conductive fibers mixed in are also long fibers, but generally all currently known conductive fibers are ordinary fibers that make up woven or knitted fabrics. Because they have different strength and elongation, flexibility, or heat shrinkability, they have poor conformability, and there are various problems not only in weaving and weaving but also in product quality. For example, during weaving, threads tend to break during the preparation and weaving processes, making weaving very difficult.Also, products often suffer from weaving defects, and at the same time, differences in thread quality can cause puckering or the opposite, loosening of the threads, which impairs quality. make it significantly worse. Furthermore, all conventional conductive fibers are colored black or gray, and if these threads break or fall off during weaving, dyeing, or product use, the appearance will change significantly, resulting in a change in the appearance of the product. become unable. In order to improve the weaving and knitting properties, conductive filament yarns are not used alone, but are used by combining and twisting them with the yarns that make up the woven or knitted fabric. However, this method is not sufficient, and has no effect on fatal defects that occur when conductive fibers are cut.

The present invention is an antistatic method that eliminates these drawbacks, and is a method for imparting antistatic properties to woven or knitted fabrics made of long fiber yarns of polyester synthetic fibers by mixing and weaving conductive fibers. A twisted yarn of a synthetic long fiber yarn and a polyester long fiber yarn dyeable with cation dye or a polyamide synthetic grown fiber yarn is used as a part of the warp and/or weft, and the color of the twisted yarn is darker than that of the polyester synthetic fiber. Alternatively, it is an antistatic method for polyester synthetic fiber woven or knitted fabrics, which is characterized by dyeing them in different colors.

To explain the present invention in more detail, the first characteristic is that the woven or knitted fabric targeted by the present invention is a woven or knitted fabric made of polyester long fiber yarn.
The term "long fiber yarn" as used herein refers to a so-called filament yarn, which includes both raw yarn and processed yarn, and there are no restrictions on its thickness or number of filaments. Further, there is no particular limitation on the structure of the woven or knitted fabric, and the method of the present invention can be applied to woven or knitted fabrics with any structure.

Examples of the conductive fibers used in the present invention include metal fibers, organic fibers with conductor powder dispersed in polymers, organic fibers whose surfaces are coated with metal by plating or vacuum deposition, and conductive fibers whose surfaces are coated with metal by plating or vacuum deposition. Examples include those formed by coating an organic layer in which fine powder is dispersed, and slit yarns containing metal foil. These conductive fibers are used in the form of long fibers, but in the present invention, they are combined and twisted with cationic dye-dyeable polyester long fiber yarn or polyamide synthetic grown fiber yarn, and then mixed and woven in some parts. Contamination may occur. Specifically, there are two methods: using both yarns by twisting them together as they are, crimping them once combined and twisting, crimping them separately and then twisting them together, and crimping only one of them. Methods such as plying and twisting can be used. Sufficient performance can be obtained by incorporating the twisted yarn obtained in this way at a rate of one yarn every few centimeters on a woven or knitted fabric, but as will be explained later, this part becomes a striped or lattice pattern. It may be used in any proportion desired.

After knitting and weaving, the woven and knitted fabric is dyed according to conventional methods, but what is important in this case is that the cationic dye-dyable yarns and polyamide yarns that make up the conductive twisted yarn are dyed in a color darker than the polyester fibers that make up the entire woven and knitted fabric, or in a different color. It is dyeing to the color of. As a result, the conductive fiber part becomes the pattern of the woven or knitted fabric, and at the same time, the conductive fiber becomes difficult to see and the quality of the woven or knitted fabric is significantly improved. It is also possible to prevent problems that may interfere with use.

An example of the implementation of the present invention is given below, but the present invention is not limited thereto in any way.

Example 1 Nylon 20d/2f mixed with carbon and cationic dyeable polyester 150d/30f in the S direction
After twisting at 100T/M, the yarn was false-twisted in a conventional manner to obtain a crimped yarn. This yarn was used only for the warp of a fabric using 150d/36f processed yarn for the warp and warp, at a rate of one thread per inch of the product, for tropical weaving. After weaving, the fabric was relaxed and refined in the usual manner, preset, and then dyed. Disperse dyes and cationic dyes were used for dyeing, with the former giving a reddish brown color and the latter a dark brown color. The finishing agent was only a texture control agent, and no antistatic agent was used. At first glance, the resulting woven fabric showed almost no carbon-containing nylon, but when its antistatic performance was measured, it showed extremely durable antistatic properties as shown below.

Measurement method A test cloth of size 30cm x 30cm was heated at 20℃ x 40%RH.
Measuring the amount of charge on the test cloth by rubbing it with a wool or acrylic cloth under the following conditions: Blank 15 to 20 × 10 ^-6 coulombs/m ² Test cloth 3 to 6 × 10 ^-6 coulombs/m ² Results did not change at all even after repeated washing over 50 times.

Example 2 A woven fabric similar to that of Example 1 was woven by inserting conductive fiber twisted yarns into both the warp and weft at a rate of one yarn per 1.5 cm. At the same time, cationic dye-dyeable polyester is used instead of conductive fiber plying yarn in the weft.
A fabric using 100% processed yarn was also woven, and both were dyed in the same manner as in Example 1. The color was blue for the disperse dye side and dark blue for the cationic dye side. The obtained fabric had a checkered pattern and was of good quality, and there was almost no difference between the two types of fabric. Further, the antistatic performance was the same as in Example 1 and was good.

Claims (1)

[Claims] 1. In a method of imparting antistatic properties to a woven or knitted fabric made of long fiber yarns of polyester synthetic fibers by mixing and weaving conductive fibers, conductive long fiber yarns and cationic dye-dyeable polyester are used as the conductive fibers. Using long fiber yarn or polyamide synthetic fiber yarn as part of the warp and/or weft,
A method for preventing static electricity in polyester synthetic fiber woven or knitted fabrics, characterized in that the twisted yarn is dyed in a darker or different color than polyester synthetic fibers.