3:1 Flame Retardant Dual Wall Heat Shrink Tubing (Item FR50, Flexible Tubing, Offer Yellow / Red / Green Color)

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3:1 Flame Retardant Dual Wall Heat Shrink Tubing (Item FR50, Flexible Tubing, Offer Yellow / Red / Green Color) Application

3:1 Flame retardant dual wall heat shrink tubing consists of cross-linking polyolefin outside and inner hot-melt adhesive, both of which are flame retardant materials and also have excellent ability to resist ultraviolet rays and buffer mechanical strain, fulfilling military standards AMS-DTL-23053/4.

In addition, on account of the flame retardant dual wall heat shrink tubing's good sealing property, it is applied in such occasions where wires and cables used for ships, metal tubes and so on that need to prevent moisture entry. Furthermore, it can also be used to bind and fix muti-strand wires.

Product features

The lowest temperature of beginning shrinking	70℃
The lowest temperature of ending shrinking	125℃(completely)
Operating temperature	-45℃~125℃
Heat shrinking ratio	3:1
Flame retardant type	Yes
Major material	EVA
Standard color	black (other colors can be ordered)

Specification chart

Specification	Inner diameter before shrinking	Size after shrinking(mm)			Package standard
Specification	Inner diameter Minimum(mm)	Inner diameter maximum	Total wall thickness	Adhesive layer wall thickness	Meter/coil or piece
Φ3.2	3.2	1.0	0.90±0.15	0.35±0.10	200
Φ4.8	4.8	1.6	1.00±0.15	0.40±0.10	100
Φ6.4	6.4	2.2	1.25±0.15	0.45±0.12	100
Φ7.9	7.9	2.7	1.30±0.15	0.50±0.12	100
Φ9.5	9.5	3.2	1.40±0.15	0.50±0.12	50
Φ12.7	12.7	4.2	1.70±0.15	0.50±0.12	1.22
Φ15.0	15.0	5.2	1.80±0.15	0.55±0.15	1.22
Φ19.1	19.1	6.3	1.95±0.15	0.55±0.15	1.22
Φ25.4	25.4	8.5	2.05±0.20	0.55±0.15	1.22
Φ30.0	30.0	10.2	2.20±0.20	0.60±0.15	1.22
Φ39.0	39.0	13.5	2.50±0.20	0.60±0.15	1.22
Φ50.0	50.0	17.0	2.80±0.25	0.70±0.15	1.22

Dual wall tubing technology index

Property	Index	Test method
Tensile strength	≥12MPa	ASTM D 2671
Breaking elongation	≥300%	ASTM D 2671
Tensile strength after heat aging	≥8.4MPa	175℃×168h
Breaking elongation after heat aging	≥100%	175℃×168h
The axial changing ratio	-8%~+8%	ASTM D 2671
Flame retardant property	Self-extinguish within 30s	AMS-DTL-23053/4
Thermal shock	No crack and dripping	ASTM D 2671, 250℃×4h
Cold bending	No track	STM D 2671, -45℃×4h
Water absorption ratio	≤0.50%	ASTM D 570
Disruptive strength	≥15kV/mm	IEC 60243
Volume resistivity	≥1014Ω=cm	IEC 60093

Hot-melt adhesive technology index

Property	Index	Test method
Softening point	95±5℃	ASTM E 28
Water absorption point	0.005	ASTM D 570
The minimum peel strength of PE	120N/25mm	ASTM D 1000
The minimum peel strength of AL	80N/25mm	ASTM D 1000

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