Membrane materials are polyester fiber fabric or PVDF, PVF, PTFE and other surface coatings, together with high-quality PVC composed of a stable shape, and can withstand a certain load of construction textiles, its life is due to different surfaces Different coatings can generally reach 12-50 years.

    There are a wide variety of membrane materials used in membrane structures, and different countries have different requirements for membrane materials. However, depending on the materials, they can be divided into three major categories: ETFE membranes, PTFE, and PVC, but the most Commonly used membrane materials are PTFE and PVDF membrane materials.

    The PVDF film material refers to a composite material formed by coating a polyester fiber-woven base fabric with PVC (polyvinyl chloride) and then adding a 100% PVDF (polyvinylidene fluoride) surface coating. PVDF membrane material has good self-cleaning property, moderate price, convenient transportation and installation, and is more widely used in all kinds of construction fields. Its life span varies with different surface coatings. Generally, it can be achieved for 10-25 years. Ti02 (titanium dioxide) PVC film material with extremely high self-cleaning properties.
     1). This kind of material is fire-retardant material, fire-resistant special grade B1;
     2). The thickness is 0.6-1.2mm; the light transmittance is between 6%-12%; the strength is generally between 3500-9000N/5cm.

    The PTFE membrane material is Teflon, a composite material formed by coating a very thin glass fiber woven base fabric (Poly Tetra FIuoto Ethyiene, PTFE for short), PTFE The main features of the membrane material are high strength, good durability, fire resistance, flame retardance, and good self-cleaning properties. It is not affected by ultraviolet rays, and has high light transmittance, light transmittance of 80%, heat energy reflectance of 73%, and heat absorption. Rarely, it is because of the invention of this epoch-making membrane material that the membrane structure construction has become a modern permanent building.
     1). This type of material is non-combustible material, refractory grade A1, permanent membrane material, with a service life of more than 30 years;
     2). The thickness is 0.6-1.2mm, the light transmittance is between 8% and 18%, and the strength is generally between 3500-9000N/5cm.

    ETFE film material (Ethylene Terafluo Ethylene abbreviated ETFE), ETFE's Chinese name is ethylene-tetrafluoroethylene copolymer

    The thickness of the film material is usually less than 0.20mm. This kind of film material is light and has a good light transmittance of 95%. It is called "soft glass" and has good toughness, high tensile strength, and is not easily torn. The ductility is more than 400%. Weather resistance and chemical resistance, melting temperature up to 200 °C; can effectively use natural light, save energy; good acoustic properties. The self-cleaning function makes the surface less stainable, and the contaminated dirt can be carried away by rain erosion. The cleaning cycle is about 5 years. The ETFE film is completely recyclable, can be reused to produce new membrane material, or can be separated. After the impurities are produced in other ETFE products, the ETFE film has a service life of at least 35 years and is an ideal material for a permanent multi-layer movable roof structure.