Fire-retardant requirements for wire and cable

With the enhancement of people’s awareness of fire prevention, flame retardant requirements have been put forward for wires and cables used in important engineering facilities, instruments, and electrical equipment. Some provinces and cities in China have stipulated that fire-retardant wires and cables must be used for power supply networks and important facilities within 500m from buildings. It is a kind of low cross-linked hydrophilic polymer compound with a three-dimensional spatial network structure. It is neither soluble in water nor soluble in common organic solvents. Unlike traditional absorbent materials, it not only has high water absorption, but also has good water retention. It can absorb water that is hundreds or even thousands of times heavier than itself. The absorbed water is not even under high pressure. Will overflow.

In the past 30 years, superabsorbent resins have become an important medical and sanitary material, and have shown broad application prospects in the areas of agriculture, forestry and oil exploitation, daily-use chemical environmental protection, and food processing. Superabsorbents have been developed so far. Starch cellulose and synthetic resins. It can not only be used to track the quality of PVC resin products, analyze quality problems, but also provide scientific basis for the development of new PVC products, selection and improvement of process conditions.

Starch preparation process Complex products Heat resistance poor perishable Metamorphic uneasy storage Cellulose water absorption performance is relatively poor and synthetic resins (especially polyacrylates) have a rich source of raw materials, petrochemicals, low prices, simple processes, and mold control The advantages of long-term storage of high water absorbency, and thus become the focus of current research.