PTFE Powder purge powder for extruders braided packings

Product Overview

Description

Properties
PTFE is a thermoplastic polymer, which is a white solid at room temperature, with a density of about 2200 kg/m³. According to Chemours, its melting point is 600 K (327 °C; 620 °F). It maintains high strength, toughness and self-lubrication at low temperatures down to 5 K (−268.15 °C; −450.67 °F), and good flexibility at temperatures above 194 K (−79 °C; −110 °F).PTFE gains its properties from the aggregate effect of carbon-fluorine bonds, as do all fluorocarbons. The only chemicals known to affect these carbon-fluorine bonds are highly reactive metals like the alkali metals, and at higher temperatures also such metals as aluminium and magnesium, and fluorinating agents such as xenon difluoride and cobalt(III) fluoride.

 

PTFE is used as a non-stick coating for pans and other cookware. It is nonreactive, partly because of the strength of carbon-fluorine bonds, and so it is often used in containers and pipework for reactive and corrosive chemicals. Where used as a lubricant, PTFE reduces friction, wear, and energy consumption of machinery. It is commonly used as a graft material in surgical interventions. Also, it is frequently employed as coating on catheters; this interferes with the ability of bacteria and other infectious agents to adhere to catheters and cause hospital-acquired infections.

 

Density	2200 kg/m3
Glass temperature	114.85 °C (238.73 °F; 388.00 K) [22]
Melting point	326.85 °C (620.33 °F; 600.00 K)
Thermal expansion	112-125 · 10−6 K−1 [23]
Thermal diffusivity	0.124 mm2/s [24]
Young's modulus	0.5 GPa
Yield strength	23 MPa
Bulk resistivity	1016 Ω·m [25]
Coefficient of friction	0.05-0.10
Dielectric constant	ε = 2.1, tan(δ) < 5(-4)
Dielectric constant (60 Hz)	ε = 2.1, tan(δ) < 2(-4)
Dielectric strength (1 MHz)	60 MV/m
Magnetic susceptibility (SI, 22 °C)	−10.28×10−6 [26]