Qingdao Ruikai Heat Shrinkable Material Co., Ltd , a subsidiary of Qingdao Zhengde Group , is a joint venture company established with advanced technologies imported from USA . The leading products include research and development of heat and cold shrinkable materials for petroleum, natural gas , chemical , electric power , telecommunication , machine manufacturing , water supply and discharge engineering , engine , electric appliances , packaging and other sectors . The company is also engaged in heat and cold shrinkable materials for anti-corrosion of long transmission pipelines and high and low-voltage insulation of electric power sector as well as construction and engineering and electric power armor clamps. The company has import and export license. 　　We have been certified to ISO9001:2000 international quality system . Tested by the authoritative agencies, the products have been found to be compliant with a number of standards , including American UL224 and RAYCHEM , Canadian CAN/CSA , German hoesch , Italian SOCOTHERM , etc., and outperform SY/T4054-2003. 　　Persisting in the business principle of "quality first and credit superiority”, the company makes full use of the technological advantages of the internationally renowned company and offers the most excellent products to the users. All-round implementation of the quality assurance system provides higher space for development of high-tech products. With PDCA and customer orientation, the company is fully committed to development of the Chinese national industry and seeks to repay the society through success.