The quality of functional protective clothing is worrying
Today, the Shanghai Administration for Industry and Commerce randomly inspected functional workwear in Shanghai, and the unqualified rate was as high as 36%. These unqualified types include high temperature resistance, fire protection, moisture absorption Functional fabrics that can wick away sweat, cover up, remove static electricity, resist oil and water, etc.
The unqualified rate is so high that it deserves our in-depth thinking. Functional protective clothing with substandard quality will bring safety hazards in industrial manufacturing. For example, anti-static fabrics do not As for the protective performance against static electricity, the quality of the covering fabric is not up to par, causing damage to the human skin under ultraviolet radiation. The high-temperature-resistant and fire-proof fabric does not meet the requirements for heat protection, leaving the wearer exposed to high temperatures and fire threats at any time.
The following article mainly focuses on the quality inspection of anti-static fabrics and how to choose high-quality anti-static fabrics.
Antistatic fabric is usually an antistatic fabric woven with new conductive yarn (or metal fiber blended chemical fiber fabric yarn) , divided into three categories: pure cotton, polyester cotton and chemical fiber. The principle is based on two mechanisms: charge leakage and neutralization.
Detection method of antistatic fabric
Measure the warp and weft density: Use a warp and weft density mirror to measure the warp and weft density of the fabric respectively and compare.
Measure resistance: Use a surface resistance tester to measure the warp and weft resistance of the fabric and compare them.
The comparison principle is:
Choose a smaller resistance;
If the resistances are the same, choose the one with stable resistance value;
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, use a magnifying glass to see if there is one or several thicker fibers, and use the surface resistance test Measure the resistance of the separated conductive fibers. By taking out several pieces in succession, you can basically infer whether every black thread in the fabric contains conductive fibers. (Conductive silk uses carbon organic conductive fiber, which is black or gray, generally around 20D, between 1F and 6F. In order to meet the strength requirements when weaving, it is necessary to combine a general black or white polyester fiber).
As a reminder, you should pay attention to the following points when choosing functional fabrics.
1. When purchasing functional workwear, you should choose products that are clearly labeled. For products that claim to be functional, you should choose work clothes that clearly indicate functional standards, or work clothes that clearly indicate both functional indicators and testing methods.
2. Don’t be fooled by the functional claims, such as comfortable touch, low carbon, heat dissipation, moisturizing, energy saving, breathability and other vague concepts. Also, don’t believe in nonsense propaganda, such as claiming to block wind. , and the wind-blocking function cannot be defined at all. There are no corresponding performance indicators for claims of ecological low-carbon, cold contact, resistance to oil and water stains, etc. You must pay attention to whether the corresponding functional indicators meet the requirements to avoid losses.
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