At present, the overall development trend of China's door and window curtain wall industry is good, and the total output value and sales volume of upstream and downstream industries such as aluminum alloy doors and windows, building curtain walls, aluminum profiles for construction, door and window hardware fittings, glass and building glue have all increased. In the development of building door, window and curtain wall industry, we must focus on solving four major problems.
A, doors and windows curtain wall fire prevention.
A fire broke out in the North Annex Building of the new site of CCTV, covering an area of 8,490 square meters, resulting in a direct economic loss of 654.38+0.6 billion yuan. Last June, 5438+065438+ 10, a fire broke out in the 28th floor teacher apartment building in Jing 'an District, Shanghai. This year, Huang Chao Wanxin International Building, the tallest building in Shenyang, caused a fire by setting off fireworks and firecrackers. The fires in the three buildings are all related to the thermal insulation materials of the doors, windows, curtain walls and external walls of the building, so should ordinary doors and windows have fire prevention performance? Should the curtain wall of a high-rise building be designed as a fire-proof curtain wall? Should the performance of thermal insulation materials used in curtain walls of high-rise buildings be completely changed? This industry is facing a big problem.
With the acceleration of urbanization in China, there are more and more high-rise and super-high-rise buildings in many big cities. Shanghai has more than 400 super-high-rise buildings with a height exceeding 100 meters, which has surpassed Hong Kong and become the city with the largest number of high-rise buildings in the world. High-rise building fire is a worldwide problem. Fire prevention is a new topic in building curtain wall and decoration industry.
In September last year, in the tianjin fire Research Institute of the Ministry of Public Security, the china construction metal structure association Aluminum Door, Window and Curtain Wall Professional Committee and the Fire-resistant Components and Accessories Branch of the China Fire Protection Association jointly organized the observation and discussion activities of building curtain wall fire test. At the meeting, experts from the field of building fire-proof components and accessories and aluminum door and window curtain wall experts discussed the fire-proof problems of building door and window curtain walls and the development trend of thermal insulation and fire-proof materials for exterior decoration of high-rise buildings. This is an in-depth academic exchange between the curtain wall industry and the Fire Protection Association of the Ministry of Public Security, which is very beneficial to formulate new fire protection requirements for curtain walls of buildings in the future.
Second, the qualifications of foreign curtain wall consulting companies in China.
Curtain wall consultation has been popular abroad for some time. As a powerful professional organization, curtain wall consulting company provides technical services and engineering supervision for the owners on behalf of the third party, which is quite common in the curtain wall industry abroad. At present, some domestic curtain wall projects have been hired by Party A as curtain wall consulting companies or curtain wall consultants.
Judging from the actual situation of curtain wall engineering consultation at present, it can be described as various: some consulting companies began to design curtain wall engineering in the early stage of the project plan; Some are employed as project bid evaluation experts, and some may not participate in bid evaluation; Consulting companies are large and small, and their technical level is uneven. There is no strict access system in this country. What responsibilities should the consulting company bear? How to manage? Many enterprises and experts hope that trade associations will attach importance to it and bring it into the category of industry management, so that the building curtain wall industry in China can develop healthily and orderly.
Third, the management of silicone structural sealant industry.
Building silicone structural sealant has always been an important functional material in building curtain wall industry, and the quality of structural sealant has always been a common concern in curtain wall industry. Although time bomb is an early topic, it is not mentioned in the society now, but we still have to constantly remind enterprises to sound the alarm from time to time and pay attention to product quality. Never ruin the whole building curtain wall industry because of an unqualified structural adhesive. We have carried out industry certification for structural sealant enterprises for many years. Generally speaking, most certified enterprises pay attention to product quality, and no major accidents occurred in curtain wall engineering due to the quality of structural sealant products.
However, we found that there are still mixed good and bad, and some curtain wall projects use a small amount of brand products, and at the same time, some other brands of glue are mixed. Due to the rising price of raw materials, some enterprises use too many additives to reduce costs, which leads to problems such as poor adhesion of sealant and dissolution of insulating glass butyl adhesive, which not only destroys the sealing structure of door and window curtain walls, but also affects the service life of building projects and even personal safety.
In order to further standardize the use of silicone structural adhesive for building doors, windows and curtain walls, strengthen the industrial management of silicone structural adhesive manufacturers and products, strengthen the supervision and inspection of product quality, and strive to improve the overall quality and level of products in the silicone structural adhesive industry, the professional committees of aluminum doors, windows and curtain walls and curtain wall engineering of China Building Decoration Association continue to carry out annual product sampling inspection of building silicone structural sealant manufacturers recognized by the industry, and the products that pass the annual inspection are recommended for this year's industry.
Fourthly, the product quality of aluminum alloy profile insulation strip is broken.
Around 2002, China began to gradually produce aluminum alloy heat insulation profiles and began to use heat insulation strips imported from Europe. In 2005, the Association organized the drafting and compilation of two industry standards, namely, Rigid Plastic Insulation Strip for Building and Penetrating Aluminum Alloy Profile for Building. In 2006, the state launched the building energy-saving policy in an all-round way, and the demand for aluminum alloy energy-saving doors and windows increased sharply. According to incomplete statistics, the annual demand of aluminum alloy insulating rods in China is about 65.438+0.3 billion meters. At present, PVC, nylon 6 and other materials are still used to replace PA66 in the market, and there is also the phenomenon of stealing beams and replacing columns in the insulation aluminum doors and windows project. Some projects use high-quality insulation strips to process door and window samples, while PVC insulation strips are used in practical projects. Doors and windows made of insulation strips that do not meet the national standards are obviously lax in structure, which is even more dangerous for the external windows of high-rise buildings.
The association will fully publicize the national standards for thermal insulation products, implement industry promotion and certification, and implement the annual inspection system for certified enterprises. Actively encourage enterprises to participate in industry certification, and recommend the use of industry-certified insulation products.
Identify toxic plastic steel doors and windows and see the essence through the surface
In recent years, plastic steel doors and windows have been rapidly popularized in the field of construction engineering because of their good energy-saving effect. As a green product, it is increasingly favored by users. However, energy conservation does not mean environmental protection. Toxic plastic steel doors and windows not only pollute the environment, but also endanger human health.
In order to protect consumers from the infringement of toxic plastic steel doors and windows, here are several simple methods to judge whether plastic steel doors and windows are toxic.
Look at the product introduction name. Toxic plastic steel doors and windows generally use low-priced lead salt stabilizers. This raw material contains lead and is named PVC profile. Non-toxic plastic steel doors and windows adopt thioorganotin T- 137 stabilizer, which is non-toxic and pollution-free, and meets the requirements of environmental protection, and is named VPVC profile.
Look at the packaging label. Look at the product name, implementation standard, factory name, address, quality grade, etc. Marked on the product packaging or attached label. Such as whether the basic content is marked completely, and whether there is ghosting or deviation in the color matching of words or patterns. If the contents of the package logo are incomplete, and the characters or patterns are overprinted with ghosts or deviations, they must be produced by small profile enterprises, and it is best not to buy them.
See quality inspection certificate. After selecting plastic steel doors and windows, you must ask the dealer for the product quality inspection certificate. If the inspection object in the certificate or inspection report contains lead, it proves that the product is a PVC profile.
Look at the color of the product. The color of toxic plastic steel doors and windows is white, but the intuitive feeling is very dull, that is, dark or white and blue, with a strong sense of smoothness. After a period of use, it gradually turns gray-black due to sulfur and sulfide pollution in the atmosphere. Non-toxic plastic steel is pure in color, like ivory white, bright and clean, crystal clear and soft, and has the feeling of infiltration, and it will not be grayish black when it is polluted by sulfur and sulfide in the atmosphere.
See the use effect. Lead dust is formed on the surface of lead salt plastic steel doors and windows under the long-term action of sunlight and heat, which will cause lead poisoning and lead pollution. After lead enters the human body, except a part of it is excreted through feces and sweat, most of it precipitates in the bone marrow and dissolves into the blood, which damages the hematopoietic system, cranial nerve system, urinary system and reproductive organs of the bone marrow. Lead can also hinder human blood synthesis, leading to anemia, headache, dizziness, fatigue, lethargy, constipation and limb pain. The above symptoms will not appear when using organic tin plastic steel doors and windows.
Colored plastic doors and windows will flourish in the future
According to DuPont's survey of China profile market, the application of colored doors and windows in the market is increasing at a rate of 200% ~ 300% every year.
Colored plastic doors and windows are used more and more. Colored plastic doors and windows mainly rely on the colorization of PVC plastic profiles. Compared with the plastic doors and windows made of white PVC profiles, colored plastic doors and windows have the advantages of novelty, easy coordination with architectural decoration and diverse surface textures. Therefore, colored plastic doors and windows are favored and loved by many users.
Because the profile of colored plastic doors and windows is darker than the white profile, the profile of plastic doors and windows has a multi-chamber structure, and the chambers of plastic doors and windows are not connected with the outside world or other chambers, but are closed to each other. Therefore, under the influence of high temperature heat, the enclosed air layer in the outdoor room will expand when heated, and the expansion degree of the outdoor room is greater than that of the indoor room, so the plastic door and window sash profile will be deformed. Therefore, in order to solve the thermal deformation problem of colored plastic doors and windows, exhaust holes are drilled and milled in closed chambers connected with the outer surface of colored profiles, so that the air in these chambers is communicated with the outside, and the air in the chambers exposed to high temperature is released after being heated and expanded.
According to DuPont's survey of China profile market, the application of colored doors and windows in the market is increasing at a rate of 200%-300% every year. Many well-known profile enterprises at home and abroad, such as Zhejiang Cai Zhong, Dalian Shide, Wuhu Conch, Xi 'an Gaoke Plastic Industry, Hebei Baoshuo, Beijing Futian, Anhui Guofeng, Germany Kemeiling, Germany Vicat, Japan YKK Yoshida Building Materials, Royal Canada and so on, have introduced color profile technology. Plastic doors and windows and aluminum doors and windows have joined the ranks of lewdness, and the colors of doors and windows are becoming richer and richer, with more advanced two-color extrusion, film covering and spraying.