PTFE (glass fiber) membrane materials Product Guide 
 First, the selection of points 
 1.1 Product Definition 
 1.2 Products 
 Divided according to strength grade Ⅰ, Ⅱ, Ⅲ, Ⅳ grade 
 1.3 Product Description 
 PTFE membrane substrate material for glass fiber fabrics, fiber diameter should be 3.30 ~ 4.05μm range, the weight should be more than 150g/m2. 
 The main material to the coating of PTFE resin, the content should be not less than 90%, coating weight should be more than 400g/m2. PTFE film thickness of the material should be greater than 0.5mm. 
 To prevent chemical corrosion and ultraviolet erosion, not aging, in the rain with a self-cleaning properties. 
 1.4 Implementation of the standards 
 No 
 1.5 Technical performance requirements 
 Name of the indicator parameter 
 IIIIIIIV 
 Total weight (g/m2) ≥ 800 ≥ 1050 ≥ 1250 ≥ 1500 
 Tensile strength (N/5cm) 3500 / / / / 6500 
 Tear strength (N) (trapezoid tear method) by the / zonal 300/300300/300400/400500/500 
 Transmittance (%) 
 1.6 points selection 
 1) In Europe, the United States, Japan and other countries PTFE membrane material was designated as the A2-level quasi-noncombustible materials. PTFE membrane material in the fire environment temperature exceeds 250 ℃, it will release toxic gases, after China's Ministry of Public Security Fire Detection Research Institute, according to GB8624 "Classification on burning behavior of building materials" was designated as the B1-level flame retardant materials. 
 2) PTFE membrane materials, color, light reflectance and transmittance requirements should meet the following table. 
 Membrane, membrane material type color light reflection rate (%) membrane surface transmittance (%) 
 PTFE membrane material white, translucent 70 ~ 8010 ~ 50 
 3) The manufacturer gives the physical and chemical properties of the membrane surface quality guarantee period is 10 years. But for the PTFE membrane were built over 20 years of weathering test observations show that the mechanical and physical chemical properties without degradation. 
 Second, the comparison with related products 
 ETFE, PVC, and PTEF part of the fabric membrane material performance comparison 
 1) ETFE membrane is a single non-polyester fabric membrane, and only made after the gas is injected under pressure to form the structure of gas bearing structures. 
 2) PVC membrane material and the PTFE membrane is a multi-functional composite materials, which constitute the primary from the fabric, it has a high resistance to creep the ability to use as a structural material. 
 3) ETFE film materials and PVC and PTFE fabric membrane material of two commonly used part of the performance and the reference price comparison table below. 
 Surface layer of polyester film material PTFE membrane material PVC membrane material ETFE 
 Tensile strength warp / weft (kN / m) 115/102124/10010/12 (0.25mm thick) 
 Visible light transmittance (%) 10 ~ 1510 ~ 50> 95% 
 Flexibility / resilience crease general low high 
 To maintain self-cleaning properties of the membrane surface of 5 to 10 years 20 years 20 years 
 Maintain the mechanical properties of films of 10 to 30 years 20 years 15 years 
 Market reference price (yuan / m2) 60 ~ 160300 ~ 800900 ~ 1500 
 Sanxin membrane structure Shenzhen Co., Ltd. Contact: Mr. Yang (Manager) is a professional membrane structures, tensioned membrane, landscape film, construction film, cable and membrane structures, membrane structures of steel, cable-stayed film, support tensioned membrane, rain films structure, network structure, steel structure design and construction of large enterprises, the business scope includes the design of cable-membrane engineering, production, installation, maintenance, and purchase and sale of such film material. The company has many in the membrane structure industry, engineering design and production and installation of high-quality talent, and with the Beijing Jiaotong University, Tsinghua University, Tongji University and other famous institutions and foreign companies to establish specialized membrane structures close working relationship. Company uses the most advanced FORTEN32, ANSYS, and other professional software modeling of membrane structure, load analysis, cut-and-structure calculation, experienced technical staff have been on the membrane structure of the installation process, the manufacture membranes for research and development, membrane structure for the enterprises in the rapid development of the industry provides a good platform. 
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