Double-layer(PTFE-FEP) Polytetrafluor Ethylene Heat Shrink Tube


Description

The double-layer heat shrink tubing is made from a blend of polytetrafluoroethylene (PTFE) and polyperfluoroethylene (FEP). This unique blend gives the double-layer heat shrink sleeve outstanding electrical insulation properties, a low thermal conductivity coefficient, great flexibility, high resistance to high temperatures, and waterproof and gas-proof characteristics.



Technical index of polytetrafluoroethylene (PTFE) outer layer

Performance project	representative value	test method
Melting point	327℃	/
Use temperature	-65-260℃	/
Density	2.15g/cm3	ASTM D792
Tensile strength	24MPa	ASTM D638
Elongation at break	300%	ASTM D638
Fire resistance	VW-1	UL-224
Dielectric constant	2.1	ASTM D150
Volume resistivity	>1015Ω·cm	ASTM D257

Technical index of the inner layer of polyperfluoroethypropene (FEP)

Performance project	representative value	test method
Melting point	260-270℃	/
Use temperature	-65-200℃	/
Density	2.15g/cm3	ASTM D792
Tensile strength	20MPa	ASTM D638
Elongation at break	300%	ASTM D638
Fire resistance	VW-1	UL-224
Dielectric constant	2.1	ASTM D150
Volume resistivity	>1015Ω·cm	ASTM D257

PTFE-FEP dual-layer heat shrink sleeve Structure

Dimensions

Specifications	The inner diameter before contraction D（mm)	After contraction the inner diameter D（mm)	Thickness before shrinkage W（mm)	Thickness after shrinkage W（mm)	Packaging length
Outer layer: Ф 4.0	4.0+0.3	≤2.1	0.20±0.08	0.30±0.08	1m/pcs
Inner layer : Ф 3.0	3.0±0.1	Melt	0.5±0.08	Melt

Note: Special sizes and packaging can be customized as required.

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