The large-scale production of plastic steel profiles in China began with the introduction of equipment by Dalian Shide Group in 1995. At present, the production capacity of plastic steel profiles in China has reached 5 million tons per year. Most of the manufacturers' production capacity cannot be fully utilized, and there are serious overproduction and homogenization competition. At present, the largest production scale is Wuhu Conch Profile Co., Ltd., followed by Dalian Shide, Zhejiang Zhongcai, Jiangsu Huaihai, Jiangsu Huahong, and Shanxi Zhongde. The current national standard for plastic steel profiles in China is GB/8814-2004, and enterprises that have obtained national exemption from inspection are also produced with reference to this standard. Different from European and American countries, the types of profiles in China are single. Most of the current circulation on the market is 60MM swing door and window series profiles and 80MM push-pull series of door and window profiles. The above two specifications account for more than 80% of the total consumption.
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