SFTW-203 Datasheet, PDF (1/2 Pages) 3M Electronics – Tubing Very Flexible Polyolefin

SFTW-203 Tubing
3:1 Very Flexible Polyolefin
Data Sheet
Product Description
3M^™ SFTW-203 is a 3:1 shrink ratio
tubing that offers an outstanding balance
of electrical, physical and chemical
properties for a wide variety of industrial
and military applications. SFTW-203 is
made of very flexible, heat-shrinkable
polyolefin which is mechanically tough,
chemically resistant, and can be easily
surface printed.
SFTW-203 tubing has been
engineered to offer a low shrink
temperature of 100°C (212°F). This
allows the tubing to shrink rapidly, and
minimizes heat exposure and possible
damage to temperature sensitive
substrates.
SFTW-203 tubing meets the
performance requirements of MIL-DTL-
23053/5 Class 1, and is UL Recognized
(File No. E48398) for flame retardance.
It is rated for continuous operation from
-55°C (-67°F) to 135°C (275°F), and
withstands elevated temperatures of
300°C (572°F) for brief periods.
Typical Applications
The extra flexibility and low shrink
temperature of SFTW-203 tubing make it
ideal for shrink-fit jacketing and
insulation of flexible wire bundles and
temperature sensitive components. The
3:1 shrink ratio makes SFTW-203 the
insulation of choice for end terminations
where the connector body is larger than
the cable and for repair applications
where the tubing must be slid over a
connector. SFTW-203 can also be used
to insulate an oversized component in
line to the wiring.
Shrink Ratio
SFTW-203 has a 3:1 shrink ratio. When
freely recovered, the tubing will shrink to
33% of its as-supplied internal diameter.
The recovered wall thickness of the
tubing is proportional to the degree of
r e c o v e r y.
Standard Colors
Black.
Standard Packaging
Boxes of four-foot lengths, or large
spools. Cut pieces subject to factory
quotation.
Ordering Information
Order SFTW-203 by product name, size
equivalent to expanded inner diameter,
color, and package type. Always order
the largest size that will shrink-fit snugly
over the item to be covered.
Example: SFTW-203, 1/2", black, 4 ft
lengths.
Typical Properties
Standard Sizes and Dimensions
Ordering
Size
1/16
1/8
1/4
3/8
1/2
3/4
1
1 1/2
Expanded I.D.
(Minimum)
in.
(mm)
.059
.118
.236
.354
.472
.709
.945
1.535
(1,5)
(3,0)
(6,0)
(9,0)
(12,0)
(18,0)
(24,0)
(39,0)
Recovered I.D.
(Maximum)
in.
(mm)
.020
(0,5)
.039
(1,0)
.079
(2,0)
.118
(3,0)
.157
(4,0)
.236
(6,0)
.315
(8,0)
.512 (13,0)
Note: Dimensions in inches are approximate.
Recovered
Wall
Thickness
(Nominal)
in. (mm)
.018 (0,45)
.022 (0,55)
.026 (0,65)
.030 (0,75)
.030 (0,75)
.030 (0,75)
.039 (1,00)
.045 (1,15)
Applicable Specifications
MIL-DTL-23053/5, Class 1; ULFile E48398;
CSA LR 38227
Physical
Tensile Strength
2600 PSI
Ultimate Elongation
400%
Longitudinal Change
±5%
Secant Modulus
(2% elong.)
8700 PSI
Specific Gravity
1.29
Heat Shock
No cracking,
(4 hrs. @ 250°C)
flowing
or dripping
Water Absorption
0.2%
Heat Aging
Elongation
(168 hrs. @ 158°C)
350%
Low Temperature Flexibility
(4 hrs. @ –55°C) No cracking
Flammability Self extinguishing
Electrical
Dielectric Strength 700 V/mil
Volume Resistivity 10¹⁵ ohm-cm
Chemical
Corrosive effect Non-corrosive
Solvent Resistance
Tensile Strength
1100 PSI
Dielectric Strength 400 V/mil
Fungus Resistance
Inert
Technical information provided consists of typical product data and
should not be used for specification purposes. Unless otherwise
noted, all tests are performed at room temperature.