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JIANGSU ZHONGBANG CONVEYOR BELT CO., LTD.
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PTFE membrane
OverviewQuick DetailsPlace of Origin:Jiangsu, China (Mainland)Brand Name:ZOBOMModel Number:001PackagingDeliveryPackaging Detailsas customers
$29 /Meter
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PTFE membrane is a material made by coating the superfine glass fiber fabric with PTFE resin. Such membrane has good welding performance, excellent ultraviolet resistance, anti-ageing performance and flame retardation. In addition, it has the best anti-dirt and self-cleaning performance among all building membranes, but it is characterized by poor ductility, which results in the difficult construction and surprisingly high cost. The processing method is the fiber fabrics are placed quickly into Teflon melt for times, so that both sides of the fabrics are uniformly applied with Teflon coating. Thus permanent PTFE membrane was born. Then permanent membrane structure was popular in USA. Many scholars carried out deep study on membrane structure. 20 years later, the follow-up test results have shown that the mechanical properties and chemical stability of such membrane were reduced by only 20-30%, with little color change, still with smooth and elastic surface layer. Dust and chemical substance particles in the atmosphere are difficult to adhere or penetrate it. After the rainwater flushing, the building membrane can recover its original clean surface coating and light transmittance. This can be sufficient to prove strong life and wide market prospect of PTFE membrane.
PTFE Membrane structure is an all-new architectural structure type integrating architecture, structural mechanics, fine chemistry and material science as well as computer technology, thus embodying very high technology content. Its curve may change randomly with the design of the architect, and in combination with the overall environment, it may be used to build the benchmark image works. Under the sunshine, the building covered by the membrane is filled with natural diffused light inside, without the difference between the positive light side with strong contrast and the shadow, thus creating indoor broad and harmonious visual environment. In the evening, the light in the building penetrates the membrane on the skylight into light the night sky, and the building shape manifests the dreamy effect.The major characteristics of PTFE membrane are: lightweight, high strength, fireproofing and flame retardation, good self-cleaning, free from the influence of ultraviolet, fatigue resistance, torsion resistance, anti-ageing, and long service life. It is characterized by high light transmittance and very low thermal absorption. It is the invention of this epoch-making membrane material that has made membrane structure building become the modern permanent building.
Building membrane is widely used in large public facilities: gymnasium roofing system, airport hall, exhibition center, platform and landscape pavilion and so on.
(1) Polymer is also macromolecular polymer, generally with molecular weight up to dozens of thousand to several million order (104-106). Raw materials for the synthesis of polymer are monomers, that is, ethylene monomer, vinyl chloride monomer, propylene monomer and so on; these monomers are combined through constant repeated linking into polyethylene (PE), poly-vinyl chloride (PVC) and polypropylene (PP) and so on.
(2) Substrate is generally divided into two types:
Polyester filament (terylene, PET): raw materials for the synthesis of polyester are ethylene glycol and terephthalic acid. Benzene ring here is introduced to improve the melting point and rigidity of the material. Terylene is characterized by: high melting point, good mechanical property below 150-175°C, resistance against solvent, corrosion, abrasion and grease, capable of being washed for times, and proper water penetrability and air permeability. It is the first type in the synthesized fiber. If ethylene glycol is replaced by butadiene glycol, it may produce softer terylene polyester with lower melting point.
Glass fiber: glass is non-crystal, without fixed melting point. When glass is heated and melted and then pulled into the wires, it becomes glass fiber. Glass fiber has the characteristics: high tensile strength, not only higher than that of various natural fibers, but also higher than that of composite fiber and steel. However, it has low modulus of elasticity, about 1/3 that of steel, so it belongs to a brittle material; it has good heat durability, generally with stable performance below the temperature of 300°C; it has good electric insulation.
PTFE + filler Every PTFE + filler layer includes multiple runs of PTFE dispersoid coating. PTFE has excellent characteristics, such as resistance against most of strong chemicals, very low friction coefficient. In addition, it is non-sticky and noncombustible. It has very good insulating performance, and it is resistant against ageing, UV, and moisture … These PTFE coatings can make it free from being influenced by the surrounding environment, thus reducing the properties. In PTFE, different fillers are added to achieve certain other characteristics, such as enhanced abrasion resistance, light transmittance, and coloring.
Substrate coating. Substrate coating is a critical part of the synthetic structure. It serves not only as the substrate, but also as the base for the subsequent sizing for glass woven fabric. The substrate coating determines the ductility of the coated product. Specific formula can achieve certain special properties
Glass woven fabric: glass woven fabric is the frame for composite material, and determines the mechanical property of the coated products. Glass woven fabric has the following characteristics:
-Large tensile strength: glass fiber is the firmest in the textile fabrics, and even has higher tensile strength than that of steel wire at the same diameter.
-Stable size: low ratio of elongation of fiber after being applied with forces, usually less than 3%. Glass fiber made of it has extremely good size stability under various conditions.
-Strong resistance against high temperature: in spite of low cost, glass woven fabrics have excellent heat resistance. At 700°F (371°C), it can maintain about 50% of tensile strength at room temperature; at 900°F (482°C), it can still maintain about 25% of tensile strength at room temperature. Softening point of glass fiber is 1555°F (846°C), and its melting point is 2075°F(1121°C.
-Good fireproofing performance: Glass woven fabric is synthesized with inorganic materials, so it is noncombustible. When we pay attention to the combustibility of the materials, glass woven fabric is the obvious choice.
-Resistance against other chemicals: same as glass, glass fiber has very strong resistance against chemical attack. Durability: Its completely inert surface prevents glass woven fabric from the attack of daylight, mildew and bacteria.
Product properties
Self-cleaning property
PTFE membrane has very good self-cleaning property. Since rainwater will be accumulated into water drops on its surface, so its surface may be naturally cleaned.
Optical property
Membrane material can remove most of ultraviolet and prevent the color fading of the internal articles. Its transmission for natural light is up to 25%. Transmitting light generates uniform diffused light in the structure, without shadow, without glaze, but with good color rendering. In the evening, the membrane structure can emit natural and tender light under the joint effect of the surrounding environment light and internal lighting.
Mechanical property
MD PTFE membrane: with the thickness only 0.8mm, but its tensile strength has reached the level of steel. Membrane has low modulus of elasticity, which makes it beneficial to form the complex curve pattern. Its very lightweight has met the requirements of large-span building very well, and can reduce the total construction cost of the large-span building to a large extent.
Acoustic property
General membrane structure is transparent to the low frequency lower than 60Hz, and for the structure with special sound absorbing requirements, the membrane structure with FABRASORB unit may be used, to achieve better sound absorbing effect than that of glass.
Fireproofing property
In the present, the widely used membrane materials have the BI fireproofing level, belonging to a nonflammable material. The fireproofing properties can meet the national fireproofing standards in France, Germany, USA and Japan.
Insulating property
Single-layer membrane material has the insulating property same as that of brick wall and better than that of glass. Same as the building made with other materials, membrane building may also adjust the interior temperature with other means. For example, suspension of the insulating layer inside, the use of air-conditioning and heating equipment and so on.
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