Development status of the hottest insulating glass

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Development status of insulating glass market since the No. 76 document issued by the Ministry of construction in October 1999, the consumption of insulating glass in China's construction and other markets has increased significantly, especially since the country vigorously promoted energy-saving plastic steel products, the application of insulating glass in the market has been widely popularized, and the market consumption has increased by leaps and bounds

according to incomplete statistics, the consumption of insulating glass in China's market was about 700000 square meters in 1995. Until 1997, the market consumption was about 1.5 million square meters. In 1998, the market consumption was about 3million square meters. In 1999, it reached 5million square meters. By 2000, it had exceeded 10million square meters. The market consumption almost doubled. With the national attention to the promotion of energy-saving products, it is estimated that in 2001, the domestic market demand for insulating glass will be close to 20million square meters, and the market application of insulating glass products has entered a period of rapid development

the expansion of market demand has driven the development of relevant materials, supporting equipment and production technology. According to incomplete statistics, by 2000, there were more than 150 imported complete sets of insulating glass production lines and about 400 sets of simple equipment made in China. The application of product varieties from simple single channel sealed aluminum strip method to double sealed aluminum strip method and elbow technology, as well as the introduction and application of new energy-saving product Shiwei high adhesive strip insulating glass, has greatly promoted the development of insulating glass product technology, improved product quality, and made the market of insulating glass products develop healthily. The market of insulating glass in China is gratifying and encouraging. At the same time, we should also be sober to see that there are still some misunderstandings in the process of market development, which deserve the attention of people of insight:

I. irrational market competition

generally speaking, as the market capacity increases and there are more manufacturers, the market competition will be fierce, which will urge all manufacturers to improve product quality and reduce unit product consumption and various management costs, Improve the ability of market competition and obtain space for survival and development in the market competition. At present, there is an abnormal phenomenon in the domestic market competition. On the one hand, the products required by users are cheap but ignore the high quality, which makes some manufacturers, especially the raw material manufacturers, control the experimental process through the automatic control of single-chip microcomputer. They blindly reduce the cost of materials and ignore the quality of products, or shoddy products, Taking advantage of the fact that most consumers do not understand how to identify the quality of products, they deceive the majority of consumers. On the other hand, the production of products rushed into mass action, and enterprises flooded the market with low-cost and low-quality products, resulting in confusion in market operation to a certain extent. According to the survey, by the end of 2000, less than 50% of the domestic manufacturers of insulating glass had production equipment, and most of the other manufacturers produced single channel sealing products, and in the production process, they could not produce in strict accordance with the national standards. As stipulated in the national standard, the thickness of the insulating glass sealing layer is 8 ± 2mm for single channel sealing and 5 ~ 7mm for double channel sealing, so as to ensure that the insulating glass has sufficient edge sealing capacity and service life. However, the thickness of the insulating glass sealing layer in the market is no more than 5mm for single channel sealing and double channel sealing, and such products can only ensure the service performance of less than 50% of the insulating glass. As the sealant of insulating glass raw material, in order to ensure the sealing performance, the proportion of raw rubber must reach more than 22%. However, the content of raw rubber in the sealant of some manufacturers and the adhesive strips produced by some domestic adhesive strip manufacturers is less than 17%. Such products are difficult to ensure the performance of insulating glass. But even so, there is still room for market sales. Some manufacturers use such raw materials to produce products, which impact the market with incredibly low prices. As a result, the insulating glass products that should have been used for at least five years have become invalid after less than two years of use, which has seriously affected the image of high-quality insulating glass products and market sales. This is a problem worthy of our serious consideration

II. Insufficient understanding of insulating glass

due to the short production history of insulating glass in China, although the popularization of products is fast, the popularization of relevant technology and basic quality knowledge is insufficient. Some people regard the double-layer glass produced by foam adhesive strips that can make polyurethane foam more delicate and uniform as insulating glass or call the insulating glass sandwich glass. Due to market reasons and residents' purchasing power and other reasons, in the mid-1990s, some buildings in some areas began to use a kind of foam double glass, which sandwiched the foam spacer between the two layers of glass. After a short period of use, impurities such as water and dust will appear between the two layers of glass. Some people, including some producers, call it hollow glass, which are two fundamentally different products. As a real insulating glass product, a series of sealant with low water vapor permeability, strong aging resistance and sealing performance of new materials have been developed at the same time in the country, which can ensure that the interior of insulating glass will not be fogged for at least 5 years

III. insufficient attention to architectural glass

from the perspective of the structural development of the building itself, in order to improve the comfort of the living environment and increase daylighting, the area of doors and windows gradually increases. According to the current proportion, the area of doors and windows accounts for more than 20% of the building area, of which glass accounts for more than 70% of the area of doors and windows. In terms of the proportion of energy loss, 70% of the energy loss of the whole building is from doors and windows. At present, the three properties of the project (air tightness, water tightness and wind pressure resistance) are emphasized in the process of completion acceptance of construction projects

with the introduction of some laws and regulations by the state and many provinces and cities, insulating glass products and safety products that emphasize building energy conservation have been introduced. As a construction unit or construction supervision unit, in the process of project acceptance, it should consider whether the performance and service life of insulating glass products meet the requirements while considering the safety performance and service life of door and window frame materials and building construction. As an industry association and relevant departments of the industry, while actively discussing the technical development of relevant products in the industry, they should cooperate with the national law enforcement departments to determine the technical indicators and service life of various products, so as to promote various production enterprises to improve product quality and make the competition of products embark on the track of a virtuous circle. It is believed that through our joint efforts, China's insulating glass product market will surely embark on the track of sound development

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