In foreign countries, Germany, Austria, and Italy represented the development of rigid PVC micro-foam technology in the 1970s. Representative manufacturers include Krauss-Maffei (Germany) and Badenfeld. (Battenfeid), Bausano (Italy), and AMUT (AMUT). The above-mentioned manufacturers mainly develop twin-screw extrusion lines for the processing of rigid PVC micro-foamed sheets, pipes and other micro-foamed profiles with a width of more than one meter. They are mainly used for the interior decoration of vehicles, ships, aircraft and buildings. Water pipes, etc. According to statistics, in 1996, the amount of PVc micro-foamed products used in major developed countries in Europe was 168,000 tons, and the amount in the United States was 75,000 tons. With the increase in people’s awareness of the environment, the annual amount of PVc micro-foaming products is increasing at a rate of 15%, especially this In a few years, the United States has increased its usage more quickly, and it is basically able to use this type of material in general instead of wood. Traders who seek processing in our country are commonplace. Japan, especially South Korea and Taiwan, started to promote this technology in the 1980s. Although it developed late, it was very fast. Mainly to develop single-screw extruder, and pay attention to the development and research of profile surface treatment technology, including various printing technology, thermal transfer technology, coating technology. This product began to form small-scale industrial production capacity in China in the early 90s of last century through the introduction of foreign micro-foam production equipment, and some domestic manufacturers mostly introduced twin-screw extruder production lines of micro-foamed sheets from Germany, Austria and Italy. Based on a large number of improvements and researches by domestic manufacturers, in recent years, domestically developed single and twin screw extruders have been developed in China, and formulas have also been used to provide formulation additives along with the entry of foreign products. A good choice of space, so that product quality has improved a big step over foreign countries. However, due to the impact of the development of downstream products and accessories on domestic products, coupled with the lack of awareness of environmental protection among domestic people, improvements in the surface treatment technology of products, and diversification of varieties, it is the majority of domestic manufacturers that introduce equipment that has not reached the market. The intended purpose. In order to accelerate the further promotion and application of domestic PVC micro-foamed chemical bonding materials, the state has set up a “National Coordination Group for Chemical Building Materials†jointly formed by the Ministry of Construction, the State Bureau of Chemical Industry, the National Building Materials Bureau, the State Light Industry Bureau, and the Petrochemical Corporation. Responsible for the coordinated leadership of research, development, promotion and application of chemical building materials throughout the country. Premier Zhu Rongji attached great importance to the promotion and application of chemical building materials. He had made several important instructions on the work of the leading group of chemical building materials and pointed out that the chemical building materials industry should be used as a key supporting industry in the construction and housing industries, and further develop the housing industry through vigorous development. Drive the development of the chemical building materials industry. At present, the national chemical building materials are roughly divided into three categories: one is plastic steel doors and windows; the second is a variety of plastic pipe, pipe fittings; the third is a variety of interior decoration materials and a variety of waterproof materials. Among them, interior decoration materials mainly refer to PVC micro-foaming profiles that have great development potential. In recent years, many domestic manufacturers have digested and absorbed foreign micro-foam production technology and equipment, and have initially studied rigid PVC micro-foam production equipment. Most of them have already developed twin-screw production extrusion lines, which can be used for wide processing PVC micro-foamed sheet and foamed tubing. Zhangjiagang Huida Plastic Machinery Co., Ltd. has concentrated on its own characteristics of machinery, mold, automatic control, plastic processing, polymer materials and other multi-disciplinary talents, based on the full absorption of foreign technology, combined with China's national conditions, a successful development Method PVC micro-foam single and twin-screw extrusion lines, matching micro-foam special molds and formula technology, this production line is particularly suitable for processing small and medium-sized profiles, including a variety of indoor and outdoor decorative materials and other chemical building materials. 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