Dual Wall 3:1 Heat Shrink Tubing

Model: CB-DWT (3x)

Material
Exterior layer: cross-linked modified polyolefin resin
Inner layer: hot-melt adhesive

Shrink ratio: 3:1

Applications
The dual wall 3:1 heat shrink tubing is an adhesive-lined, flexible, flame-retardant and environmentally friendly tubing that features an excellent water resistance and moisture resistance. This heat shrink tubing is widely used as waterproof shrink tubing for wire linkage of electronic devices, as corrosion prevention tubing for metal tubing and as seal tubing for cable branches. The dual wall 3:1 heat shrink tubing can also be used against looseness caused by polymer chain relaxation.

Size
Size As supplied (mm) After Recovery (mm)
Inside diameter (D) Total wall (T) Max. inside diameter (d) Total wall (t) Adhesive wall
Ф2.4 2.8±0.4 0.40±0.15 1 0.85±0.25 0.35±0.10
Ф3.2 3.6±0.4 0.40±0.15 1 0.85±0.25 0.35±0.10
Ф4.7 5.1±0.4 0.40±0.15 1.5 1.05±0.25 0.45±0.10
Ф6.4 6.9±0.5 0.45±0.15 2 1.10±0.25 0.45±0.10
Ф7.9 8.4±0.5 0.55±0.20 2.5 1.45±0.25 0.45±0.10
Ф9.5 9.9±0.5 0.60±0.20 3 1.45±0.25 0.45±0.10
Ф10.5 11±0.6 0.60±0.20 3.5 1.45±0.25 0.45±0.10
Ф12.7 13.3±0.6 0.60±0.20 4 1.50±0.35 0.45±0.15
Ф15.7 16.4±0.7 0.65±0.25 5 1.70±0.40 0.45±0.15
Ф19.1 19.7±0.7 0.75±0.25 6 2.00±0.45 0.65±0.20
Ф25.4 25.9±0.7 0.75±0.25 8.4 2.00±0.55 0.65±0.20
Ф30.0 31.0±1.0 0.80±0.30 10 2.20±0.55 0.75±0.20
Ф40.0 41.0±1.0 0.85±0.35 13.7 2.50±0.55 1.00±0.25
Ф50.0 51.0±1.0 0.85±0.35 16.5 2.50±0.55 1.00±0.25
Specifications
Item Test method Specifications
Radial shrinkage UL224 ≥50%
Longitudinal shrinkage UL224 0~10%
Tensile strength ASTM D2671 ≥10.4MPa
Elongation at break ASTM D2671 ≥200%
Aging in circulating-air oven 158℃±1.0℃/168h -
Tensile strength after aging ASTM D2671 ≥7.3MPa
Elongation at break after aging ASTM D2671 ≥100%
Volume resistivity ASTM D876 ≥1.0x1014Ω· cm
Dielectric voltage ASTM D2671 2500V,60s, no cracking
Water absorption ASTM D570 ≤1.0%
Features
  • This dual wall heat shrink tubing has minimum shrink temperature of 80℃ and a minimum full recovery temperature of 125℃.
  • This heat shrink tube is compliant with UL224 and VW-1 certifications. The approval number is E180908.

Dual Wall Heat Shrink Tubing
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