Diaphragm pump diaphragm material description

  • Monday, 25 June 2018

Diaphragm pump uses NBR, chloroprene rubber, fluororubber, polyvinylidene fluoride and polytetra-ethylene. To meet the needs. Placed in a variety of special occasions, used to pump media that cannot be pumped by conventional pumps.
NBR: Made from butadiene and acrylonitrile by emulsion polymerization, NBR is mainly produced by low-temperature emulsion polymerization. It has excellent oil resistance, high abrasion resistance, good heat resistance, and good adhesion. Strong. The disadvantages are poor low temperature resistance, poor ozone resistance, poor electrical performance, and low elasticity.
Neoprene: Also known as chloroprene rubber, it is an elastomer produced by alpha-polymerization of chloroprene (ie, 2-chloro-1,3-butadiene) as the main raw material. Appearance is milky, beige or light brown flake or block, density 1.23-1.25g/cm3, glass transition temperature −40-50°C, fragmentation point −35°C, softening point about 80°C, Decomposition at 230-260°C. Soluble in chloroform, benzene and other organic solvents, swelling in vegetable oils and mineral oils without dissolution. Good physical and mechanical properties, oil resistance, heat resistance, flame resistance, sunlight resistance, ozone resistance, acid and alkali resistance, chemical resistance. The disadvantages are poor cold resistance and poor storage stability.
Polyvinylidene fluoride: White powdery crystalline polymer. Density 1.75-1.78g/cm3. Hygroscopic humidity -39 °C, embrittlement temperature -62 °C, melting point 170 °C, thermal decomposition temperature of 316 °C above, long-term use temperature -40 ~ 150 °C. Can be molded using general thermoplastic processing methods. Its outstanding features are high mechanical strength and good radiation resistance. Has good chemical stability, is not corroded by acids, alkalis, strong oxidizers and halogens at room temperature, and fuming sulfuric acid, strong alkalis, ketones, ethers, and a few chemicals can swell or partially dissolve, dimethylacetamide. The strong polar organic solvent such as dimethyl sulfoxide can dissolve it into a colloidal solution.