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Polyester staple fiber

Polyester staple fiber

Polyester staple fiber-is a fiber obtained by cutting polyester spun into tow. PET is in the form of rice grains or flakes, with various varieties and colors (usually the main component of many beverage bottles we come into contact with is polyester, and polyester staple fibers can be produced by slicing them through two main processes of pre-spinning and post-spinning. According to different requirements, polyester staple fibers of different specifications can be cut into post-spinning, generally 4D-22D, according to its curling, it can be divided into two-dimensional and three-dimensional). 75% for chemical fiber with polyester, according to the requirements of the textile industry, the manufacture of polyester staple fiber and polyester filament.

Propylene oxide

Propylene oxide

Propylene oxide, also known as propylene oxide, methyl ethylene oxide, and 1,2-propylene oxide, is an organic compound with a chemical formula of C3H6O. It is an important raw material for organic compounds and is second only to polypropylene and acrylonitrile. The third largest propylene derivative.

Toluene

Colorless clear liquid. There is a benzene-like smell. Strong refractive index. With ethanol, ether, acetone, chloroform, carbon disulfide and glacial acetic acid miscible, very slightly soluble in water. Relative density 0.866. The freezing point is -95°C. Boiling point 110.6 ℃. Refractive index 1.4967. Flash point (closed cup) 4.4 ℃. Flammable. Vapor can form explosive mixture with air, explosion limit 1.2~7.0 (volume). Low toxicity, median lethal dose (rat, oral) 5000 mg/kg. High concentrations of gas are narcotic. It's irritating.

Xylene

Colorless transparent liquid; It is the product of two hydrogen substituted by methyl on the benzene ring. There are three isomers, namely, ortho, meta and pair. In industry, xylene refers to the mixture of the above isomers. The pollution of xylene mainly comes from synthetic fibers, plastics, fuels, rubber, additives of various coatings and various adhesives, waterproof materials, and also from the combustion gas of fuel and tobacco leaves. Xylene is moderately toxic and has a certain carcinogenicity. It is harmful to people and should be avoided in life.

Trichloromethane

Trichloromethane

Colorless transparent liquid. There is a special smell. It tastes sweet. High refractive index, non-combustible, heavy, volatile. The pure product is sensitive to light. When exposed to light, it will react with oxygen in the air and gradually decompose to generate highly toxic phosgene (carbonyl chloride) and hydrogen chloride. 0.6%~ 1% ethanol can be added as a stabilizer. It can be miscible with ethanol, benzene, ether, petroleum ether, carbon tetrachloride, carbon disulfide and oils, and 1ml is soluble in 200ml water at 25 ℃. Relative density 1.4840. The freezing point is -63.5 ℃. Boiling point 61~62 ℃. Refractive index 1.4476. Low toxicity, median lethal dose (rat, oral) 1194 mg/kg. It's narcotic. There is a carcinogenic possibility.

N-heptane

Heptane (English name n-Heptane) is a colorless volatile liquid. It is mainly used as a standard for the determination of octane number, and can also be used as anesthetics, solvents, raw materials for organic synthesis and the preparation of experimental reagents.

Nitrobenzene

Nitrobenzene, organic compound, also known as dense spot oil, bitter almond oil, colorless or yellowish oily liquid with bitter almond flavor. Difficult to dissolve in water, density than water; soluble in ethanol, ether, benzene and oil. In case of open fire and high heat, it will burn and explode. It reacts violently with nitric acid. Nitrobenzene is obtained by nitration of benzene with nitric acid and sulfuric acid. It is used as an intermediate for organic synthesis and as a raw material for the production of aniline. Used in the production of dyes, spices, explosives and other organic synthesis industry.

P-Nitrotoluene

1-methyl -4-nitrobenzene, an organic matter, CAS No. 99-99-0; This product is a general hazardous chemical and can be purchased only after relevant documents are provided for the record in accordance with national regulations.

Dichloroethane

Dichloroethane (chemical formula: C2H4Cl2;Cl(CH2)2Cl, formula quantity: 98.97), I .e. 1,2-dichloroethane, is a kind of halogenated hydrocarbon, commonly expressed as EDC. Colorless or light yellow transparent liquid melting point -35.7 ℃, boiling point 83.5 ℃, density 1.235 g/cm, flash point 17 ℃. Insoluble in water is mainly used as an intermediate in the preparation process of vinyl chloride (polyvinyl chloride monomer), and is also used as a solvent. It is a colorless liquid with a chloroform-like odor at room temperature. It is toxic and potentially carcinogenic. Possible solvent alternatives include 1,3-dioxane and toluene. Used as a solvent and manufacturing, trichloroethane intermediates. Used as a solvent for wax, fat, rubber, etc. and as a grain insecticide.

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