Sponge factories generally have a density of 16-55, a resilience of about 14-57, a hardness of less than 45, a tensile strength of 58-140, a small pull of tensile strength, all above 60, and compression residue of less than 10 or 6. In addition, we also have super soft sponge and high resilience sponge, which are also more widely used products. Sponge factory products are mainly used in the production of soft furniture, cushioning materials, sound insulation materials. Sponge factories can accept other kinds of physical property standards according to user's needs. Adding colouring agent can produce different colour sponges. Cut into sheets and blocks according to user's requirements.

Sponge factory is a kind of elastic material which is formed by mixing foaming resin, foaming additives and resin bonding (making the product adhesive), foaming, hot pressing and blasting. Generally, polyurethane is the main material of sponge. Foam plastics are also called porous plastics. Sponge factory takes resin as the main material. It is made of plastic with many micro-holes inside by mechanical method (air or carbon dioxide is injected into the foam while mixing mechanically) or chemical method (taking part in foaming agent). Foam plastics are divided into two types: closed pass and open hole. When the polyurethane foam rubber is opened, the sponge is formed.

Sponges in sponge factories are chiefly flaky in shape. They are high-grade plastic rubber products made of PPS plastics and polyphenylene sulfide. Products should first be delivered to customers by land through wholesale. Sponge storage environment needs to be far away from fire source, with various colors, such as white, Pearl white, carbon ash, pink, red and blue, etc. The degree of cold resistance is very high, and the melting temperature is as high as 270 degrees Celsius. Conventional flake size is 12 cm, 5 cm is mainly used for packaging and transportation. 1. Generally speaking, sponges have light weight and good physical strength such as tensile strength. 2. Good shock absorption. 3. As for water, it has good chemical stability. 4. According to density, hardness, colouring and other classification, it has a wide range of types, suitable for various secondary processing and combination, selection of a wide scale.