How is the difference between medium-alkali, alkali-free glass fiber and high-alkali glass fiber?
The easy way to distinguish medium-alkali, alkali-free glass fiber and high-alkali glass fiber is to pull a single fiber yarn by hand. Generally, alkali-free glass fiber has high mechanical strength and is not easy to break. The glass fiber breaks when pulled gently. Observed with the naked eye, the alkali-free and medium-alkali glass fiber yarns generally have no wool yarn phenomenon, while the high-alkali glass fiber yarn wool yarn phenomenon is particularly serious, and many broken monofilaments puncture yarn counts.
How to distinguish the quality of glass fiber yarn?
Glass fiber is made of glass as raw material and processed by various molding methods in a molten state. Generally divided into continuous glass fiber and discontinuous glass fiber. On the market, more continuous glass fibers are used. There are two main products of continuous glass fiber produced according to the current standards of our country. One is medium-alkali glass fiber, code-named C; the other is alkali-free glass fiber, code-named E. The main difference between them is the content of alkali metal oxides. Medium-alkali glass fiber is (12±0.5)%, and alkali-free glass fiber is <0.5%. There is also a non-standard glass fiber product on the market. Commonly known as high alkali glass fiber. The content of alkali metal oxides is above 14%. The raw materials for production are broken flat glass or glass bottles. This kind of glass fiber has poor water resistance, low mechanical strength and low electrical insulation, which is not allowed to be produced by national regulations.
Generally qualified medium-alkali and alkali-free glass fiber yarn products must be tightly wound on the bobbin, and each bobbin is marked with the number, strand number and grade, and the product inspection verification should be carried out in the packing box. The content of product inspection and verification includes:
1. The name of the manufacturer;
2. The code and grade of the product;
3. Number of this standard;
4. Stamp with a special seal for quality inspection;v
5. Net weight;
6. There should be factory name, product code and grade, standard number, net weight, production date and batch number on the packing box.
How to reuse glass fiber waste silk and waste yarn?
After being broken, waste glass can generally be used as a raw material for glass products, and the problem of foreign matter and infiltrant residue needs to be solved. Waste yarn can be used as general glass fiber products such as felt\glass steel\tiles and so on.
How to avoid occupational diseases after long-term exposure to glass fiber yarn?
Production operations must wear professional masks, gloves and sleeves to avoid direct skin contact with glass fiber yarn.
Hebei Yuniu Fiberglass Manufacturing Company Limited is a fiberglass material manufacturer with over 10-year experience, 7- year exporting experience.
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Post time: Oct-08-2021