Plain Cloth Bandage For Medical Use

Material of Plain Cloth Bandage for Medical Use is PBT.Feature of PBT:Polybutylene terephthalate (PBT) belongs to polyester series. It is a milky white translucent to opaque crystalline thermoplastic polyester resin made by polycondensation of 1.4-butanediol with terephthalic acid (PTA) or terephthalic acid (DMT) and through mixing procedure. Together with pet, it is collectively referred to as thermoplastic polyester, or saturated polyester! PBT was first developed by German scientist P. schlack in 1942. Later, Celanese company (now Ticona) of the United States carried out industrial development and went on the market under the trade name Celanese. In 1970, it was put on the market with 30% glass fiber reinforced plastic, the trade name was x-917, and later changed to celanex. In 1971, Eastman company launched a product with glass fiber reinforced chain and non reinforced product, the trade name is tenete (ptmt); In the same year, Ge also developed similar products, including three varieties of non enhancement, enhancement and self extinguishing. Subsequently, world-famous manufacturers BASF, Bayer, GE and Ticona of the United States, Toray and Mitsubishi Chemical of Japan, Xinguang synthetic fiber of Taiwan, Changchun artificial resin and South Asia plastics have successively put into production, with a total of more than 30 global manufacturers.

Physical and chemical properties of PBT

PBT is milky white, translucent to opaque, crystalline thermoplastic polyester. It has high heat resistance, toughness, fatigue resistance, self lubrication, low friction coefficient, weather resistance and low water absorption, only 0.1%, Maintain various physical properties in humid environment (including electrical properties), electrical insulation, but large volume resistance and dielectric loss. It is resistant to hot water, alkali, acid and oil, but vulnerable to halogenated hydrocarbon erosion, poor hydrolysis resistance, rapid crystallization at low temperature and good formability. The disadvantage is low notch impact strength and large molding shrinkage. Therefore, most of them are reinforced by glass fiber or inorganic filling, with strong tensile strength and bending The degree of deformation can be more than doubled, and the thermal deformation temperature can be greatly increased. It can work at 140 ℃ for a long time. After glass fiber reinforcement, the longitudinal and transverse shrinkage of the product are inconsistent, which is easy to warp the Plain Cloth Bandage for Medical Use product.

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