SUMITUBE™ W3B2

CatalogNo.891

[Dual wall, flame-retarded heat-shrinkable tubing with meltable adhesive for waterproofing of irregular-shaped objects]
SAE-AMS/UL/CSA recognized

■ SAE/UL/CSA recognized
■ Watertight sealing with good adhesion to metals, polyolefin and PVC
■ Effective for waterproofing of irregular-shaped objects
■ Flame-retarded (PBDE/PBB-free)
■ Flexible
■ Thicker adhesive (than SUMITUBE™ O2B2)
✔RoHS directive 10 substances

  • UL
  • CSA
  • SAE
  • moisture resistance Dual
  • Flame Retarded

Applications

  • ■ Waterproof sealing for electronic devices with irregular shapes or profiles
    ■ Encapsulation for wire branches
    ■ Insulation and protection for wire joints

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Basic Properties

Category Heat shrink tubing
Material Outer : Irradiated cross-linked flexible flame-retarded polyolefin
Inner : Meltable adhesive
Flammability Flame Retarded
Shrink temperature min. 110℃
Shrink ratio min. 60%
Longitudinal change -15 to 5%
Continuous operating temperature -55 to 125℃
Specifications/Approvals UL224
  File No. E75077
  Catalog No. SUMITUBE™ W3B2 or 891
  Rating temperature: 125℃
  Rating voltage: 600V
CSA C22.2 No. 198.1
  File No. LR33298
  Rating temperature: 125℃
  Rating voltage: 600V
SAE-AS23053/4 Class 3
Marking on Surface
Available colors Black
Flexibility Flexible
Environmental Compliance RoHS,ELV
Industry Automotive,Construction machinery,Industrial machinery,Electronics

Oil/Chemical resistance (room temperature)

Gasoline Gas oil Lubricant Alcohol Acid Alkali

:Very good :Good :Not applicable in some cases

Features

Properties Items Requirements Typical values*1
Mechanical Tensile strength*2
Elongation
Cold impact
Heat shock
min. 10.4MPa
min. 250%
-55℃ x 3 minutes, no crack
250℃ x 4 hours, no crack
14.4MPa
472%
Pass
Pass
Electrical Dielectric strength
Volume resistivity
min. 11.8kV/mm
min. 1014Ω・cm
41.1kV/mm
2.11 x 1015Ω・cm
Chemical

Water absorption
Corrosion against bare copper
Color stability
Fluid Resistance

 

Tensile strength
 Dielectric strength
Flammability (UL224)

23℃ x 24 hours, max. 1.0%
121℃ x 16 hours, no corrosion
175℃ x 24 hours, no change
After immersion in the fluids specified in
SAE-AS23053 at 23℃ for 24 hours,
min. 6.2MPa
min. 7.9kV/mm
Flame-retarded, pass, all tubing flame test

0.49%
Pass
Pass


10.4MPa
38.1kV/mm
Pass

*1: For reference use only *2: Calculated by using outer cross section

Sizes

 

Trade size(mm) As supplied(mm) After recovered(mm) Unit length
(min.)(m)
Inside diameter(min.) Inside diameter(max.) Wall thickness*3 Adhesive thickness (nom.)
3/1 3.00 1.00 1.00 ± 0.30 0.50 1.22
6/2 6.1 2.00 1.00 ± 0.30 0.50 1.22
12/4 11.9 4.10 1.80 ± 0.40 0.80 1.22
24/8 23.9 8.1 2.50 ± 0.50 1.00 1.22
40/13 39.9 13.0 2.50 ± 0.50 1.00 1.22
  • *3: Including inner adhesive
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