We are the first to research, development and manufacture PP cotton opener in China. Our products enjoy good reputation in China. We export to Russia, Kazakhstan and other countries. At present, PSK-300 and PKS-500 series PP cotton opener manufactured by us adopt the advanced technology of tearing by a pair of large and small tooth-roller which is unique in China so that one-time opening rate reaches 99% and the length of PP cotton opened is enlarged to 35-75mm, which meet the requirements of automatic cotton charging machine. It is the ideal equipment for opening PP cotton in toy and bed upholstery industry. This product is featured with compact structure, easy-to-use, high output and low power consumption. This product has got national patent numbered ZL94241592.2. We applied for patent at the beginning of 1999 for the technology of tearing by large and small tooth-roller, which was accepted by State Patent Administration with patent application numbered 99227908.9.