Our engaged in manufacturing PTFE polymer tape machine, which also called as PTFE tape machine, Thread seal tape machine, more than 20 years, now honor ISO9001 and CE certificate obtained. We are the very first one who manufacture PTFE Tape Machine in China. Not only could we provide you the production line, but also provide raw material. The main machines include: Mixer, Calender, Slitter, Pressing Machine, Oven, Wrapping machine etc..
Range of final PTFE thread seal tape: Thickness: 0.05-0.3mm or more (according your requirement);Width: 8mm, 10mm, 12mm, 19mm, 25mm or others, according to your requirement;Length: 8m, 10m, 12m, 15m, 18m, 20m ,25m, 40, etc..according to your requirement.
PTFE is widely used in a variety of needs, such as: anti-acid and organic solvents, which itself has no toxic to people, but one of the raw materials used in the production process of ammonium perfluorooctanoate (PFOA) is considered likely to have a carcinogenic effect.
Large relative molecular of PTFE, the lower one as hundreds of thousands, while higher one can up to one million or more (degree of polymerization of 104 orders of magnitude, while the polyethylene only 103). Degree of crystallinity is generally 90 to 95%, a melting temperature of 327 ~ 342 ℃. Molecule CF2 unit in PTFE arrange by zigzag shape, because the fluorine atom radius larger than the hydrogen, so the adjacent CF2 units can not cross exactly trans orientation, but form a spiral twisted chain, fluorine atom covering almost the entire polymer chain surface. This molecular structure explains various properties of PTFE. At temperatures below than 19 ℃ to form 13/6 helix; phase transition at 19 ℃, slightly unravel the molecular to form 15/7 helix.
Though the perfluorocarbon carbon – carbon bond and carbon – fluorine bonds are broken need to absorb energy 346.94 and 484.88kJ/mol, but PTFE depolymerization energy generate 1mol tetrafluoroethylene only need 171.38kJ. So in the pyrolysis, PTFE mainly depolymerizate tetrafluoroethylene. PTFE at 260,370 and 420 ℃ the weight loss rate (%) were 1×10-4, 4×10-3 and 9×10-2 per hour.
Post time: May-30-2020