Chemical industry is the abbreviation of chemical technology, chemical industry and chemical engineering. Any technology that changes the composition and structure of substances or synthesizes new substances by chemical methods belongs to chemical production technology, that is, chemical process, and the products obtained are called chemicals or chemical products.

Chemical fiber is a kind of fiber with textile properties, which is made of natural polymer compounds or synthetic polymer compounds through the processes of preparing spinning dope, spinning and post-treatment.

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Chemical industry, chemical engineering and chemical technology are all called chemical industry for short. The chemical industry includes petrochemical industry, chemical metallurgy, chemical medicine, polymer, coating, grease and so on. They appear in different historical periods, each with different meanings, but they are closely related, infiltrated and continuous, and have been given new contents in their development process.

The early life of human beings depends more on the direct use of natural materials. Gradually, the inherent properties of these substances can no longer meet the needs of human beings, so various processing technologies have emerged, consciously and purposefully transforming natural substances into new substances with various properties, and gradually putting them into practice on the scale of industrial production.

Broadly speaking, any chemical method to change the composition or structure of substances or synthesize new substances belongs to chemical production technology, that is, chemical process, and the products obtained are called chemicals or chemical products.

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