Date：2022-01-08
The products provided by chemical industry to people are rich and colorful. In addition to producing a large number of materials for making various products for human use, there are also products with little consumption but obvious effect, so that people's life can be continuously improved. For example, various food additives used for food preservation, seasoning and strengthening nutrition.
Improve vegetable growth regulators and preservatives; Feed additives to promote high yield of meat and eggs; Basic materials and auxiliaries for the manufacture of cosmetics and spices and fragrances; Paint for decoration of houses, furniture and various tools and appliances; Pigments for various printing inks; And surfactants for washing products, etc.
There are also film (photosensitive material), sound recording (image) tape (magnetic recording material), and laser TV record (optical disc). Using these means of audio-visual communication can strengthen communication, reproduce historical scenes and perform exquisite art. With the help of information recording materials, people's vision is extended to the universe, the depths of the seabed or deep into the internal organs, and even dissect the atomic structure, which provides conditions for improving human spiritual civilization and revealing the mysteries of nature.
The above-mentioned improvement of industrial and agricultural production and life is inseparable from materials. According to statistics, by 1984, there were about 9 million kinds of chemical substances in the world, of which about 43% were materials. Although there are a large number of materials, if classified according to chemical composition, they can be summarized into three categories: metal materials, inorganic non-metallic materials and polymer materials. Composites are also listed as the fourth category, or regarded as a new type of materials derived from the three categories. Generally speaking, except that metals are products produced by the Metallurgical Department, the rest are materials produced by chemical industry.
