... chemicals, glass, and so on, Special (iron) species of fluorine-long high temperature PTFE coated fiberglass fabric cloth, also known as special ... aqua regia and various organic solvents corrosion. 4, a low coefficient of friction (0.05-0.1), is oil-free self-lubricating the ... choice. 5, light transmission rate of 6 ~ 13%. 6, with high insulation properties (dielectric constant, small: 2.6, tangent at 0 ...