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Development Status of pvc building membrane in China

by:LINYANG     2020-01-27

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at present, the development of membrane structure in China is exciting, with the construction of some large-scale gymnasiums and waiting halls, as well as the holding of international events such as the 2010 Shanghai World Expo and the Guangzhou Asian Games, opportunities and challenges have been brought to the development of China's membrane structure. Especially in terms of membrane materials, China started late and has a low technical level. Most of the membrane materials are mainly imported. PTFE, pvc, surface modified PVC, ETFE and other membrane materials are the mainstream of the market and are widely used. This article mainly Introduces pvc building membrane materials.

The membrane structure is mostly composed of steel and cables. In addition, the membrane materials combined with the structure are gradually becoming functional and intelligent. The membrane material has a light, free and beautiful shape; Light transmission, energy saving, environmental protection, excellent flame retardant performance; Anti-fouling and self-cleaning performance; Safety, long life and other advantages. Based on these advantages, building membrane materials stand out, and membrane structures are called'Architecture in the 21st century' , Applied to large stadiums, entrance corridors, shopping malls, entertainment venues, parking lots, exhibition venues, plant sightseeing parks and other buildings.

Development Status of pvc building membrane in China

at present, the widely recognized standard for building membrane is JISA- The three categories of A, B and C specified in 93 are divided according to their fire resistance. Class A is the best, with glass fiber fabric as the substrate coated with PTFE; Class B is the second, with glass fiber fabric as the base material coated with PVC news'Made of PVC; Class C is the second of the three categories, with polyester (Polyester)The fabric is coated with PVC. According to the coating material, there are Polytetrafluoroethylene (PTFE)Polyvinylidene fluoride (PVDF), Polyvinylidene fluoride (PVF), Polyvinyl chloride (PVC)Polyurethane (PU), Rubber, etc.

glass fiber PVC building membrane material. This kind of film was developed and applied earlier. It is usually stipulated that the thickness of PVC coating at the intersection point of warp and weft of glass fiber fabric should not be less than 0. 2mm, the general coating will not be too thick, to meet the requirements of use. In order to improve the aging resistance of PVC itself, some light and heat stabilizers are often added during Coating. A certain amount of ultraviolet absorber should be added for light-colored transparent products, and carbon black is often added as stabilizer for dark-colored products. In addition, there are many ways to treat the surface of PVC. A very thin layer of metal film or aluminum spray can be laminated on PVC, and mica or Shi Ying can be used to prevent surface adhesion and contamination.

at present, many companies, scientific research units and universities are conducting research on PVC surface coating materials, such as PVDF and nano-TiO _ 2 surface coating agents, which have achieved initial results, in addition, the research on surface antifouling and self-cleaning treatment, such as bionic lotus leaf, has also begun to construct slightly rough surfaces.

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