The production principle and performance of anti-static fabrics (1)

1. Introduction

Anti-static work clothes are special dust-free and anti-static properties suitable for industries such as electronics, academic instruments, pharmaceuticals, microbial engineering, and precision instruments. Work clothes are generally made of synthetic fiber fabrics inlaid with conductive yarns. “Anti-static Clothing” (GB12014-2009) is used to prevent the accumulation of static electricity in clothing and is sewn with anti-static fabrics. It is suitable for treating static electricity. It is suitable for use in sensitive places or places with fire or explosion hazards. The production process of the anti-static fabric used is mainly to mix all or part of the anti-static fibers or anti-static fibers made of conductive materials using metal or organic matter at roughly equal intervals or evenly during the cloth fabrication process. Static synthetic fiber, or a mixture of the two. Anti-static work clothes refer to work clothes sewn with anti-static fabrics in order to prevent the accumulation of static electricity on work clothes. Anti-static fabrics are roughly equal to A fabric made by mixing conductive fibers or anti-static synthetic fibers at intervals or evenly, or a mixture of the two. Conductive fiber refers to the general name of fibers made entirely or partially of conductive materials or sub-conductive materials using metal or organic matter. Its volume The resistivity ρv~ is between 104~109Ω/cm. According to the distribution of conductive components in the fiber, conductive fibers can be divided into three types: uniform conductive component type, conductive component covering type and conductive component lamination type. At present, , the vast majority of anti-static fabrics are made of conductive fibers, especially the lamination type with conductive components, that is, lamination fibers are mostly used.

Antistatic workwear made of conductive fibers added to chemical fiber fabrics. Its electricity dissipation is based on two mechanisms: charge leakage and neutralization. When When grounded, the static electricity on the fabric is not only neutralized by the corona discharge of the conductive fibers, but also discharged to the earth through the conductive fibers; when not grounded, the static electricity on the fabric is eliminated by the weak corona discharge of the conductive fibers

2. Characteristics of anti-static ultra-clean fabrics in anti-static clothing

The anti-static ultra-clean fabric used in anti-static workwear is often called “conductive silk”. In fact, this statement is not strict. According to its own technical characteristics, conductive silk can be divided into those suitable for static electricity removal (ESD) and those suitable for clean rooms (Clean Room). Only conductive silk suitable for clean rooms can be called It is an anti-static ultra-clean fabric.

Cloth for removing static electricity? Fabrics that have been treated with anti-static finishing can be called anti-static fabrics.

Fabric The anti-static finishing methods usually include:

① The fabric is finished with an antistatic finishing agent;

Structure or components: polyoxyethylene block polymer;

Uses and application methods: Suitable for polyester, polyacrylonitrile fiber, nylon and other synthetic fibers and their blended chemical fibers Antistatic finishing of fabrics;

1. Padding process:

Measure Longitude and Weft Density: Use a warp and weft density mirror to measure the warp and weft density of the fabric respectively and compare them.

Measure resistance: Use a surface resistance tester to measure the warp and weft resistance of the fabric and compare. 　

The principle of comparison is: Choose a smaller resistance;

If the resistances are the same, choose the one with stable resistance value;

Pay attention to distinguish whether antistatic agent is added to the fabric during finishing (applicable to conductive silk with only conductive fibers added in the warp direction, commonly known as striped fabric). The method is to use a surface resistance tester to measure the warp separately. If the resistance in the longitudinal and latitudinal directions is the same, it means that antistatic agent is added, and the measured resistance does not represent the true level.

Look at the microstructure: Use a high-power magnifying glass to look at the quality of the cloth surface, compare the size of the gaps between the fibers (related to the dust filtration rate), and see if there are any attachments on the fiber surface (Related to the amount of dust generated), check whether the fibers are arranged neatly and the elasticity is consistent (if the elasticity is inconsistent, the loose fibers will be easily sanded during wearing and cleaning, and will generate dust when worn in the future).

Check conductive fiber: Conductive fiber is a key raw material in anti-static ultra-clean fabric. Checking conductive fiber is to see whether conductive fiber is added according to specifications and what kind of conductive fiber is added.

The inspection method is: use scissors to carefully cut the cloth along the edge of the black conductive fibers, separate the black conductive fibers, and use a magnifying glass to see if there is one or several fibers among them. Relatively thick fibers, and use a surface resistance tester to measure the resistance of the separated conductive fibers. Remove a few of them in succession, and you can basically infer whether every black thread in the fabric contains conductive fibers. (The conductive silk used is Carbon organic conductive fiber is black or gray, generally around 20D, between 1F and 6F. In order to meet the strength requirements when weaving, a general black or white polyester fiber is needed).
Comparing fabric process parameters: Require suppliers to provide basic parameters of fabrics, such as yarn size (how many D, how many F), warp and weft density, fabric structure, finished product width, color shrinkage and what kind of conductive fiber is used.

——Professional functional fabric supply and application comprehensive service provider. The company’s technology research and development It has strong strength, advanced production and inspection methods, and has self-operated import and export rights. It is also an ISO9001-2008 and ISO4001-2004 certified enterprise. The main products are: anti-static series, high temperature resistant and fireproof series, fireproof series, oil and water repellent and three Anti-acid series, anti-acid and alkali series, general workwear fabrics and accessories, etc. Involving metallurgy, fire protection, petroleum, chemical industry, machinery, medical and other industries. Decades of hard work, market-oriented, innovation-driven, quality-based survival , has developed and grown. Technology provides you with a full range of solutions and complete products and services.

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