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Weather Stripping For Metal Exterior Doors
Mar 08, 2018

PU is the abbreviation of Polyurethane, which is called Polyurethane for short. Due to the simple modification of the formula, different density, elasticity, rigidity and other physical properties can be obtained. At present, there are a lot of substitute glass fiber insulation materials, wood, traditional rubber products. Atomization enthalpy: kJ/mol at 25 ℃ 360 coefficient of thermal conductivity: 0.027 W/(m K) heat of vaporization: (kilojoules per mole) 344.0 conductivity: 10 ^ (6)/(0.00666 cm Ω) heat of fusion (kilojoules per mole) heat capacity: 2.840 J/(mol · K) 35.5 building external wall thermal insulation material inside the wall heat preservation coating insulation material container of air-conditioner, refrigerator insulation, PU high imitation flowers, paper printing, cable fiber, high speed road, home decoration, corner line, retro background wall), furniture (imitation wood tables and chairs), foam filler, aerospace, automotive industry (sound insulation sealing strip), high-grade sports equipment (example: boxing gloves on the tank, tae kwon do spats, judo MATS, etc.), a synthetic PU leather, footwear industry, general coatings, special protective coating, adhesive, etc. Central venous catheter (medical consumables) PTFE Teflon (English abbreviated or Teflon (PTFE, F4]), is a reputation for/commonly known as "plastics king", the Chinese brand name "Teflon", "Teflon" (Teflon), "Teflon", "rich grand" and "Teflon", etc. It is a polymer composed of tetrafluoroethylene, whose structure is simplified as -[- cf2-cf2 -]n-. High temperature resistant, use the working temperature of 250 ℃. The long-term use temperature is 200~260 degrees. Low temperature - good mechanical toughness; Even if the temperature drops to 196 ℃, also can keep 5% elongation. It's still soft at -100. Corrosion - resistant - to most chemicals and solvents, showing inertia, strong acid alkali, water and various organic solvents. Able to tolerate wang shui and all organic solvents. Weather resistant - the best aging life in plastic. High lubrication - is the lowest friction coefficient in solid materials. Minimum friction coefficient (0.04) in plastic. It's smoother than ice. Nonadherence - is the smallest surface tension in a solid material and does not adhere to any material. Non - toxic - has the physiological inertia, as the artificial blood vessel and viscera long implantation in the body without adverse reactions. Aging - resistance to radiation and low permeability: long exposure to the atmosphere, surface and performance remains unchanged. Incombustibility - the oxygen - limiting index is below 90. Acid and alkaline - insoluble in strong acids, strong bases and organic solvents (including the magic acid, or fluoroantimonic acid). Oxidation resistance - corrosion of strong oxidizing agents. Insulation - excellent electrical properties, ideal for class C insulation, a thick layer of newspaper can block 1500V of high pressure. Its electrical insulation is not affected by temperature. The dielectric constant and dielectric loss in the wide frequency range are very low, and the breakdown voltage, volume resistivity and arc resistance are high. Acid and alkaline - neutral. So there are a lot of industries and products involved.