This with synthetic material PVC as the raw material of doors and Windows to their excellent mechanical properties, weather resistance (uv) resistance, flame retardant, light weight, long service life, easy installation, low maintenance, and cheap in price.
China in the early 1980 s, when some plastic processing factory double screw extrusion molding machine, introduced from abroad in the 1980 s and gradually formed more than 1980 lines, 100 kt ability of industry, however, because of the social environment, economy and policy conditions, the PVC plastic doors and Windows industry did not form effective market. In the 80 s to 80 s, with the localization of the double screw extrusion molding machine and vigorous development of township enterprises, the plastic different profile also had some development, but, under the production capacity increase and the contradiction of market saturation, price competition is intense, is the pursuit of low cost, simplify the doors and Windows profile section, also fill large amounts of calcium carbonate in the recipe, cause the product performance is very low and inferior product, so just start plastic different profile and Windows industry once again hit.
In 1994 by the ministry of construction, ministry of chemical industry, China light industry association, the national building and China petrochemical corporation established five department jointly organized the "national chemical building materials coordination leading group", formulate and publish the relevant developing chemical building materials objectives, planning, policies and practices, etc.; Later in June 1997 issued a "about to accelerate the popularization and application of chemical building materials and restrictions, the provisions of the backward product", strongly promote the development of PVC plastic door and window industry. At this time, a number of powerful enterprises, began to digesting and absorbing foreign European profile technology essence, developed their own doors and Windows series, become the domestic plastic doors and Windows, window of door of push technology to update and development, also make the whole industry obtained the unprecedented development and growth. After 2003, the product after entering mature period, PVC industry has entered a transition period.
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