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#SM321 Daflex Shrink/Melt Heavy Wall Adhesive Lined 3:1 Shrinkable Polyolefin Tubing


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Daburn Item #:
Color:

SM321 Specification Sheet PDF

3:1 Shrink Ratio

Semi-Rigid Heavy Wall

Dual-Wall Adhesive-Lined

Flame Retardant Polyolefin Tubing



Applications


Daburn DAFLEX SM321 is a large size, heavier wall adhesive lined, large ratio, heat shrinkable tubing with a meltable adhesive liner. When 120°C is applied, the tubing will shrink to 1/3 of its supplied size. As the outer wall shrinks the inner adhesive liner melts and flows. When cooled, it offers protection for a variety of electrical applications such as insulating and sealing cable splices, terminations and jacket repairs as well as retrofitting. It provides “sealed-in” protection from chemicals and oils. DAFLEX SM321 also resists abrasion, UV radiation and is RoHS compliant.

Features

  • Shrink ratio: 67% or more in the radial direction, 20% or less in the axial direction
  • Continuous operating temperature: - 55°C (-67°F) to 125°C (230°F)
  • Flammability: UL-VW-1, CSA OFT (except clear)
  • High Carbon Black composition to resist UV radiation
  • To UL 224 Standard
  • RoHS Compliant
  • Minimum Shrink Temperature: 120°C

Product Sizes and Dimensions                                                       

Daburn

Item Number

 

 

 

 

mm

size

 

Expanded

Recovered

 

Internal Diameter (min.)

(D)

 

Adhesive Inner Wall 

(t)

 

Internal Diameter   (max.)

(d)

 

Total Wall Thickness (Nominal)

(T)

 

In.

 

mm

 

In.

 

In.

 

mm

 

In.

 

mm

SM321-0.3”

7

0.3

7.6

0.0107

0.100

2.5

0.050

1.3

SM321-0.4”

10

0.4

10.2

0.0134

0.150

3.8

0.060

1.5

SM321-0.75”

20

0.75

19.1

0.0294

0.22

5.6

0.105

2.7

SM321-1.1”

28

1.1

27.9

0.0348

0.375

9.53

0.120

3.1

SM321-1.3”

33

1.3

33.0

0.0348

0.375

9.5

0.120

3.1

SM321-1.5”

38

1.5

38.1

0.0410

0.5

12.7

0.140

3.6

SM321-1.7”

43

1.7

43.2

0.0410

0.5

12.7

0.155

3.4

SM321-2”

51

2.0

50.8

0.0375

0.75

19.1

0.155

3.4

SM321-2.7”

70

2.7

68.6

0.0482

0.90

22.9

0.155

3.4

SM321-3“

76

3.0

76.2

0.0353

1.25

31.8

0.155

3.4

SM321-3.5”

90

3.5

88.9

0.0353

1.25

31.8

0.155

3.4

SM321-4"

100

4.0

101.6

0.0455

1.75

44.5

0.155

3.4

SM321-4.5”

115

4.5

114.3

0.0442

1.75

44.5

0.170

4.3

SM321-5”

130

5.1

130.0

0.0442

1.75

44.5

0.170

4.3

 

Standard Color: Black and Red (where indicated by -2).   Please call for other colors.

All sizes sold in 4 foot lengths only.

 Specification/Test Values


Property

Test Method

Value

 

 

 

 

Physical

 

 

 

 

 

 

 

 

 

Unaged

 Tensile strength

ASTM D638

Min. 1,200 psi

 Elongation

Min. 200%

Aged

Tensile strength

ASTM D638

Min. 1,000 psi

Elongation

Min. 100%

  Fluid

  Resist.

Tensile strength

 24°C /24 hrs

 6 Fluids

Min. 750 psi

Dielectric strength

Min. 200 Volts/Mil.

Low temperature flex

-55°Cx4hrs

No cracks

Heat shock

225°Cx4 hrs.

No cracks, flowing or dripping

Secant Modulus

ASTM D882

Max. 25,000 psi

Electrical

Dielectric strength

ASTM D2671

Min. 200 Volts/Mil.

Volume resistivity

ASTM D876

Min. 1 x 1013W - cm

 

Chemical

Copper corrosion

121°C/16 hrs.

No corrosion

Fungus resistance

ASTM G21

No growth

Water Absorption

ASTM D570

Max. 0.5

Flammability

ASTM D2671

Pass

 

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