Natural rubber NRNR not certain melting point, and slowly heated to soften, completely softens at 130 ℃ ~ 140 ℃, 150 ℃ ~ 160 ℃ sticky viscous fluid into a large, 200 ℃ begins to decompose producing pouches, 270 ℃ decomposition begins abruptly. Made pouches at room temperature, NR flexible wire pouches, the temperature decreases gradually harden up 0 ℃ elasticity significantly reduced to less -70 ℃ brittle. By freezing natural rubber is heated to room temperature to restore elasticity resistant to chemical corrosion. For various polar chemicals and acids, bases have greater resistance. Of hydrocarbon oils resistance to poor. 3, excellent electrical insulation. Over butyl rubber, high pressure for 45 ~ 65KW. Production pouches, Shun Plastic (certified), pouches provided by Hengshui Shun Rubber Products Company Limited. Hengshui Shun Plastic Products Co., Ltd. (www.hsdashun.com) Hebei Hengshui, industrial rubber (milk) Polystyrene leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum meet customer needs. In Shun Plastic leadership with the staff warmly welcome all inquiries negotiations to create Shun Plastic better future.