Where is the difference between glass fiber and asbestos?How about the grade of glass fiber? How to detect? What are the levels?How is asbestos rated? What are the levels?
Asbestos is a natural fibrous siliceous minerals generally referred to, is a widely applied in building fire prevention board of silicate mineral fiber, natural mineral fiber is unique, it has good tensile strength and good heat resistance and corrosion resistance, not easy to burn, so it is widely used. There are many kinds of asbestos, the most common three are chrysotile asbestos (Bai Shimian), iron asbestos (brown asbestos) and bluestone (Lan Shimian), of which chrysotile asbestos is the most abundant and the most widely used.Glass fiber is a kind of inorganic nonmetallic material with excellent properties. English name is: glass fiber. It is prepared by high temperature melting, wire drawing, winding and weaving process with glass balls or waste glass as. All kinds of products formed finally, glass fiber monofilament diameter from a few microns to twenty micron, the equivalent of a hair 1/20-1/5, each bundle of fibers are hundreds or even thousands of root root filaments, usually as a reinforcing material of complex materials, electrical insulating materials and insulation materials, circuit board, etc. and widely used in various fields of the national economy.Glass fiber has (no) roving and twisted to form spinning frames of different specifications and uses. There are two kinds of alkali (R2O < 0.8%, code E) and medium alkali (R2O12.0 + 0.47%, code C). Mainly used as glass steel paste, lamination, winding, injection enhancement material and the insulation, composite and fireproof glass products production molding.
3. metric number, metric numberThe quality test of glass fiber precursor is mainly to test the fineness of the raw silk, that is, to measure a single strand of raw silk of a certain length and weigh it. The length must be, the thicker the silk, the heavier it will be. Now the metric numbers are usually used to indicate the extent of yarn. Until 1980, our country had been using metric numbers (referred to as public branches) to indicate the degree of yarn fineness. The former is the fixed length system, the latter is the fixed weight system.Fixed length system: yarn thickness is expressed in terms of yarn quality per unit length. The international organization for standardization recommended by the amount (line density, Tex) as a universal system of yarn thickness of the said.The amount of meaning, is to set the quality of 1000m yarn moisture regain in the male (g) that is called yarn number (T). Which is the precursor of the 1000m weighing a few grams is how many tex. such as 1000m glass fiber 20g, namely 20tex 24g, is 24tex.; this shows that the yarn is thinner, smaller number, line density is low; the yarn becomes coarse, the greater the number, the higher line density
Terminology for glass fibres and their products1. Fiber, monofilament, precursorA slender substance that is much larger in diameter and has a certain softness; known as fiber.A thin and extremely long textile unit that can be considered as continuous length, called a monofilament.A filament consisting of several tens of thousands of fibers arranged in parallel, without twist, and bonded by a wetting agent, is called a filament.At the beginning of 2, twist yarn, ply yarn, yarn cableAfter twisting, the raw silk becomes a yarn with certain unidirectional twist. This kind of sand is called "initial twist yarn". In the glass fiber industry, Chinese medicine is called "unwinding yarn".By 2 or 2 with more than primary yarn prepared by multiple ply yarn yarn that ply yarn sand in glass fiber industry and twist yarn.By multiple detwisting, composite wire by two or more than two ply yarn is prepared with balanced twist, called cable.
