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      Expanded PTFE is made of PTFE dispersion resins diaphragm stretching in a unique process. It’s a kind oflow density, high toughness material contains a lot of micro holes, and consists of numerous soft, homogeneous, fine strength of the multidirectional fiber. Expanded PTFE sheet and sealing gaskets has high tensile strength, low creep, high and low temperature resistance, corrosion resistance, good self-lubrication and non-adhesive. It contains no asbestos and other additives, non-toxic, anti-aging, conforming to the requirements of the FDA. Due to thesize stability of PTFE expanded gaskets and its good compliance, fiber becomeeven closer, airtight, watertight, leakage resistance after compression. It can maintain an excellent sealing state even in a severe corrosive and high temperature environment.

Application:

Applicable to all kinds of flanges. Suitable for computer/ electronics, chemical industry, food industry, pharmaceutical industry, semiconductor industry, aerospace industry, petrochemical industry, pulp paperindustry, ship building industry, medical equipment industry, energy, environment, etc.

Product features:

--Temperature Range: can be safely used from-200?~+260?

--Pressure resistance : from vacuum to 207kg/cm2

--Acid and alkali resistance (pH Value 0~14), corrosion resistance is not affected by general chemicals (with the exception of molten alkali metals and gaseous, liquid fluoride).

--Anti-aging: keeping fresh and pollution-freeduring long time storage.

--Creep resistance: easy to be fixed andlocked, not easily deformed after construction. 

It is an ideal seal gasket for food and pharmaceutical industry, complying with FDA standards. It can be used in rough or damaged flange, dueing to its superior fill compliance.

Main technical indicator:

Thickness	0.8mm	2.0mm
Sealability (ml/hr)	0.06	0.17	ASTM  F37B
Compressibility (%)	63.6	63.4	ASTM  F36
Recovery (%)	8.8	9.1	ASTM  F36
Stress  relaxation Ratio(%)	16.3	37.1	ASTM  F38

Specifications:

PTFE Properties:

Item	Unit           Standard
Density	g/C?	2.14~2.2
Softening Temperature	?	327
Tensile Strength	MPa	13.72~34.3
Elongation	%	150~400
Compression Pressure	MPa	12
Impact Strength (bracket)	Kg-Cm/C?	16.3
Shore Hardness	-	D50~55
Flexural Modulus	103Kg/C?	3.5~6.3
Dynamic Friction Coefficient	-	0.1?7Kg/C? 3m/min?
Thermal Conductivity	10-4cal/M•sec?	6
Specific Heat	Cal/?g	0.25
Linear Expansivity	10-5/?	10
Heat Deflection Temperature	18.5kg/C??	55
No-load  Highest  Operating  Temperature	?	260
Volume Resistance	O.Cm	>1018
Breakdown Voltage	Kv/mm	19
Dielectric Constant	60Hz~106Hz -	<2.1
Dielectric Loss	60Hz~106Hz -	<2.1x10-4
Arc Resistance	Sec	>300
Water Absorption	%	0
Flammability	-	V-0
Oxygen index	-	>95
Weather Resistance	-	Optimal
Direct Sunlight Effects	-	N/A
Acid and Alkali Effects	-	N/A
Note:	the above test value is according to ASTM standards.

Clean Workshop:

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