Use breathable steel exhaust ventilation steel is a sintered alloy is sintered alloy material with spherical particles, its poor strength, but the texture is loose, allowing the gas to pass. The need to place a portion of the exhaust of such alloys, can achieve the purpose of exhaust. But the bottom vent hole diameter should not be too large, in order to prevent its extrusion cavity pressure. Due to the low thermal conductivity breathable steel, does not make it overheat, otherwise pvc market, prone to decomposition clogged pores. Poly 曱 aldehyde known plastic pvc futures is a tough elastic material, even at low temperatures are still very good creep properties, geometric stability and impact resistance. Homopolymer materials have both copolymer material. Homopolymer material has a very good extension strength, fatigue strength, but not easy to process. A high degree of crystallinity resulting in a very high shrinkage up. For a variety of enhanced materials have different shrinkage rates. If the material is stored in a dry environment pvc, generally do not need to be dried. Homopolymer material is. Fang, a copolymer material, mold temperature has a very low coefficient of friction and good geometric stability, particularly suitable for the production of gears and bearings, pipe device (pipe valve, pump housing>, lawn equipment and a variety of transmission parts . pvc fan | Gary trade (certified) | Zhuhai pvc provided by Shenzhen Trade Co., Ltd. Shenzhen Gary Paffett Trade Co., Ltd. (www.pft-trading.com) Guangdong Shenzhen, engineering plastics. leaders, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Gary's business leadership with the staff warmly welcome all inquiries negotiations to create a better trade Parfitt future.