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  4. The development process of domestic plas...

The development process of domestic plastic steel doors and windows feels not easy

The development process of domestic plastic steel doors and windows feels not easy, and it is feasible and cherished!

The development of plastic doors and windows in China started in the 1960s.

Around 1965, Tianjin Institute of Architectural Science and other units pioneered the production of about 1,000 plastic doors. At the same time, the Hubei Provincial Institute of Architectural Science also began trial production of plastic windows, and used ACR as an additive modifier for PVC. Later, Shanghai, Beijing, Jiangsu and other places also began to develop plastic doors and windows.



In the 1970s, due to the use of a large amount of filler calcium carbonate, whose content reached more than 20%, it was called "calcium plastic doors and windows". However, if too much filler is added, the performance of the doors and windows is greatly reduced, which makes it difficult to meet the normal use requirements, and then gradually eliminated. In fact, this should be the first generation of plastic doors and windows in China. With the loss of time, the development of plastic doors and windows has also been interrupted. The "calcium-plastic doors and windows" known as the first generation of plastic doors and windows have also officially withdrawn from the stage of history.

In the 1980s, many manufacturers, mainly in the plastics processing industry, introduced plastic profile production technology and equipment from abroad, mainly from Germany, Italy, Austria and other Western European countries, and began to produce second-generation plastic doors and windows. Compared with the first-generation plastic doors and windows, the second-generation plastic doors and windows are mainly because the content of filler calcium carbonate is greatly reduced, the performance is much better, and the price is higher, but people are still generally optimistic about it. At that time, all major ministries and committees gave great support to the introduction of plastic profiles. There were as many as 180 twin-screw extruded profile production lines, and nearly 100 manufacturers engaged in the deep processing of plastic doors and windows. Xiamen Lulu Co., Ltd. and Qingdao Qinglu Co., Ltd. (the so-called Sanlu) are the leading companies of nearly one hundred plastic doors and windows, distributed in the southeast and northwest of China.

Large-scale introduction has not brought about a large-scale market. Due to the substantial increase in production enterprises, domestic chemical raw materials, especially the main raw material PVC resin, are in short supply, the price of raw materials has risen, and the prices of doors and windows have risen. The price increase and the negative effects caused by the first generation of plastic doors and windows, coupled with the lack of understanding of plastic products, there are doubts about the aging of plastic doors and windows, so that the output of plastic doors and windows has been unable to rise, and the market acceptance of plastic doors and windows It is quite weak and market development is very difficult. Until the mid-1990s, the market share of China's plastic doors and windows was still less than 3%.

The real rise of plastic doors and windows in China was in the 1990s.

In 1992, the Ministry of Construction launched the "Hard PVC Plastic Doors and Windows" atlas number 92SJ704 (1). In 1994, the industry standards for plastic doors and windows were introduced, namely "PVC Plastic Door" JGJ 3017-94 and "PVC Plastic Window" JGJ 3018-94.

Although in the industry, many people are not optimistic about these two standards, but the promulgation and implementation of these two standards make the production of plastic doors and windows law-based and evidence-based, and make the production of plastic doors and windows more standardized and standardized , Really play the role of throwing bricks and attracting jade.

At the same time, the country has also given great support to the development of plastic doors and windows, which has led to a greater development of the plastic door and window industry. In 1995, the Ministry of Construction, the Ministry of Chemical Industry, the China National Light Industry Council, the State Building Materials Administration and the China Petrochemical Corporation jointly issued the Jianke (1995) No. 223 document and printed the "About Strengthening the Promotion of China's Chemical Building Materials" "Several Opinions on Application", which mentioned: "It is required that by 2000, the amount of plastic doors and windows in the northeast, northwest and north China heating areas should account for more than 5% of the market; the proportion of plastic doors and windows in coastal areas should be no less than 30%. Buildings with corrosive environments should use plastic doors and windows as much as possible. "

In September 1994, the National First Chemical Building Materials Working Conference hosted by the State Council and the National First Building Energy Conservation Working Conference held in September 1996, both focused on plastic doors and windows, and plastic doors and windows were officially included in the National Chemical Building Materials Under development planning.

In 2000, Jianke (2000) No. 217 document issued jointly by the Ministry of Construction, the State Petrochemical Bureau, the State Light Industry Bureau, the State Building Materials Bureau, and China Petrochemical Group, triggered the "Five-Year Plan" of the National Chemical Building Materials Industry and 2010 The "Outline of Development Plan" emphasizes the need to promote the application of chemical building materials at high speed, and stipulates: "By 2010, regions and buildings that implement building energy efficiency will use 60% of plastic doors and windows, and 40% of coastal areas. The market share of doors and windows reaches 30%. "

As far as the domestic plastic door and window industry is concerned, profile extrusion production lines, molds, assembly equipment, door and window hardware, etc. have basically been fully equipped, and have their own development and design capabilities, and they have various types, moderate grades, and various products. Features, greatly reducing the gap with advanced countries. The production of various profiles has been introduced and imitated from the initial stage of introduction. After undergoing absorption, digestion and supplementation, it has developed to a new stage of design and development. Many companies have developed profiles suitable for the domestic market based on the foreign profile series and the domestic situation. They also have a certain share in the domestic market. These profiles suitable for the domestic market are also called "Chinese style" Profile ". In China, the production capacity of plastic profiles, doors and windows has begun to develop in the direction of scale. Some enterprises not only sell well in the domestic market, but also have entered the international market, and some companies have provided complete sets of technology and equipment output to foreign countries.

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