SUMITUBE™ W3B2 (4X)

CatalogNo.891

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

■ SAE-AMS/UL224 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)

  • UL
  • 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-shrinkable tubing
Material Outer : Irradiated cross-linked flexible flame-retarded polyolefin
Inner : Meltable adhesive
Flammability Flame Retarded
Shrink temperature min. 110℃
Shrink ratio min. 75%
Longitudinal change min. -15%
Continuous operating temperature -55 to 125℃
Specifications/Approvals UL224
  File No. E75077
  Catalog No. SUMITUBE™ W3B2 (4X) or 891
  Rating temperature: 125℃
  Rating voltage: 600V
SAE-AMS-DTL-23053/4 Class 3 (for select sizes)
Marking on Surface
Available colors Black, Brown, Red, Orange, Yellow, Green, Blue, Purple, Gray, White
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      (before aging)*2
Tensile strength      (after aging)*2
Elongation                (before aging)
Elongation                (after aging)
Heat shock
Cold bend
min. 10.4MPa
158℃ x 7 days, min. 7.3MPa
min. 200%
158℃ x 7 days, min. 100%
250℃ x 4 hours, no crack
-30℃ x 1 hour, no crack
17.0MPa
11.6MPa
520%
300%
Pass
Pass
Electrical Dielectric withstand      (before aging)
Dielectric withstand      (after aging)
Dielectric strength         (before aging)
Dielectric strength         (after aging)
Volume resistivity
AC2.5kV x 60 sec., no breakdown
158℃ x 7 days, AC2.5kV x 60 sec., no breakdown
min. AC2.5kV
158℃ x 7 days, min. 50% of original and min. AC2.5kV
min. 1.0 x 1014Ω・cm
Pass
Pass
24.9kV
Pass
2.3 x 1014Ω・cm
Chemical

Corrosion against bare copper

Flammability

158℃ x 7 days, no corrosion after leaving
under 95% humidity, 23℃ x 24 hours
Flame-retarded, pass All Tubing Flame Test

Pass
Pass

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

Sizes

Nominal size(mm) Supplied ID(mm) Recovered ID(mm) Unit length(min.)(m)
Inside diameter(min.) Wall thickness*1(nom.) Inside diameter(max.) Wall thickness*1(nom.) Adhesive thickness(nom.)
    4/1  *2 4.00 0.40 1.00 1.00 0.50 1.22
    8/2  *2 8.0 0.45 2.00 1.20 0.50 1.22
    12/3  *2 12.0 0.50 3.00 1.40 0.60 1.22
    16/4  *2 16.0 0.60 4.00 1.80 0.80 1.22
24/6 24.0 0.70 6.00 2.20 0.80 1.22
    32/8  *2 32.0 0.70 8.0 2.50 1.00 1.22
  • *1: Including inner adhesive *2: Sizes do not comply with SAE-AMS-DTL-23053
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