Application of Yuanming powder in glass fiber production
Glass fiber (original name: glassfiber) is an inorganic non-metallic material with excellent performance. It has many advantages, such as good insulation, heat resistance, good corrosion resistance and high mechanical strength. However, it is fragile and resistant. Poor wear. Glass fiber products are commonly used as reinforcing materials in composite materials, electrical insulating materials and thermal insulation materials, circuit boards, etc., and are widely used in various fields of the national economy, among which electronics, transportation and construction are the three major application fields. It also represents the development trend of the world's glass fiber industry in the next few years.
Glass fiber can be divided into continuous fiber, fixed length fiber and glass wool according to its shape and length. According to glass composition, it can be divided into alkali-free, chemical-resistant, high-alkali, medium-alkali, high-strength, high-elasticity and alkali-resistant ( 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 (Yuan Ming powder), fluorite and the like. The production methods are roughly divided into two categories: one is to directly form the molten glass into fibers; the other is to first make the molten glass into a glass ball or rod with a diameter of 20 mm, and then remelt it in various ways to make a diameter of 3 ~ Very fine fiber of 80 μm. An infinitely long fiber drawn by a mechanical drawing method by a platinum alloy plate is called a continuous glass fiber and is generally called a long fiber. Non-continuous fibers made by rolls or air streams, called fixed length glass fibers, are commonly referred to as short fibers.
Glass fiber properties, characteristics
When glass fiber is used as a reinforcing material for reinforced plastics, the biggest feature is the high tensile strength. The tensile strength is 6.3 to 6.9 g/d in the standard state and 5.4 to 5.8 g/d in the wet state. The density is 2.54 g/cm3. Good heat resistance, no effect on strength when the temperature reaches 300 °C. It has excellent electrical insulation and is an advanced electrical insulating material. It is also used for thermal insulation materials and fireproof shielding materials. Generally only corroded by concentrated alkali, hydrofluoric acid and concentrated phosphoric acid. Glass fiber is more resistant to temperature than organic fiber, non-combustible, anti-corrosion, heat insulation, sound insulation, high tensile strength and good electrical insulation. However, it is brittle and has poor abrasion resistance.