Sep 06,2022
Glass fiber is an inorganic non-metallic material with excellent properties. English original name: glass fiber. The ingredients are silica, alumina, calcium oxide, boron oxide, magnesium oxide, sodium oxide, etc. It uses glass balls or waste glass as raw materials through high temperature melting, wire drawing, winding, weaving and other processes. Finally, various products are formed. The diameter of glass fiber monofilament ranges from a few microns to more than 20 microns, which is equivalent to 1/20-1/5 of a hair. It is composed of thousands of monofilaments, and is usually used as a reinforcing material in composite materials, electrical insulating materials and thermal insulation materials, circuit substrates, etc., and is widely used in various fields of the national economy.
Characteristics of glass fiber chopped strands:
Glass is generally considered to be a hard and fragile object, and it is not suitable for use as a structural material. However, if it is drawn into silk, its strength will be greatly increased and it has flexibility. Therefore, it can finally become an excellent structural material after being given a shape with resin. Glass fibers increase in strength as their diameter decreases. As a reinforcing material, glass fiber has the following characteristics. These characteristics make the use of glass fiber far more extensive than other types of fibers, and the development speed is also far ahead.
Its characteristics are listed as follows:
(1) High tensile strength and small elongation (3%).
(2) High elastic coefficient and good rigidity.
(3) The amount of elongation within the elastic limit is large and the tensile strength is high, so the absorption of impact energy is large.
(4) It is an inorganic fiber, which is non-flammable and has good chemical resistance.
(5) Low water absorption.
(6) The dimensional stability and heat resistance are all good.
(7) It has good processability and can be made into different forms of products such as strands, bundles, felts, and woven fabrics.
(8) It is transparent and can transmit light.
(9) The development of a surface treatment agent with good adhesion to resin was completed.
(10) The price is cheap.
Classification of glass fiber:
Glass fiber can be divided into continuous fiber, fixed-length fiber and glass wool according to shape and length; according to glass composition, it can be divided into alkali-free, chemical-resistant, high-alkali, medium-alkali, high-strength, high-elastic-modulus and alkali-resistant glass fiber, etc.
The main raw materials for the production of glass fiber are: quartz sand, alumina and pyrophyllite, limestone, dolomite, boric acid, soda ash, mirabilite, fluorite, etc. The production methods are roughly divided into two categories: one is to directly make molten glass into fibers; the other is to first make molten glass into glass balls or rods with a diameter of 20 mm, and then heat and remelt them in various ways to make glass balls or rods with a diameter of 3 to 3 mm. 80μm very fine fibers. The infinitely long fibers drawn by the mechanical drawing method of platinum alloy plates are called continuous glass fibers, commonly known as long fibers. Discontinuous fibers made by rollers or air flow are called fixed-length glass fibers, commonly known as short fibers. Thin, short, flocculent fibers made by centrifugal force or high-speed airflow are called glass wool. Glass fibers can be processed into various forms of products, such as yarn, roving, chopped strands, cloth, tape, felt, plate, tube, etc.
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