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Tyco Electronics Corporation
300 Constitutional Drive
Menlo Park, CA 94025 USA
Specification
This Issue:
Date:
Replaces:
RT-1330
Issue 3
July, 13, 1999
Issue 2
THERMOFIT
FLUOROPOLYMER MOLDED COMPONENTS
Modified Fluoropolymer, Radiation Crosslinked,
Flexible, Abrasion Resistant, Flame Retarded, Heat Shrinkable
1. SCOPE
This specification covers the requirements for one type of flexible, electrical insulating molded component
whose expanded dimensions will reduce to a predetermined size upon the application of heat in excess of
220°C (428°F). The molded components are suitable for use in wire harness systems requiring high fluid
resistance and resistance to the effects of nuclear, biological and chemical agent exposure and
decontamination as defined herein and in RT-700.
2. APPLICABLE DOCUMENTS
This specification takes precedence over documents referenced herein. Unless otherwise specified, the latest
issue of referenced documents applies. The following documents form a part of this specification to the
extent specified herein.
2.1 GOVERNMENT-FURNISHED DOCUMENTS
Military
MIL-L-2104 Lubricating Oil, Internal Combustion Engine, Heavy Duty
MIL-H-5606 Hydraulic Fluid, Petroleum Base, Aircraft, Missile and Ordnance
MIL-T-5624 Turbine Fuel, Aviation, Grades JP-4, JP-5 and JP-8
MIL-L-7808 Lubricating Oil, Aircraft Turbine Engine, Synthetic Base
MIL-A-8243 Anti-Icing and Deicing - Defrosting Fluids
MIL-D-12468 Decontaminating Agent, STB
MIL-C-43616 Cleaning Compounds, Aircraft Surface
MIL-D-50030 Decontaminating Agent, DS-2
Federal
O-S-1926 Sodium Chloride, Technical
VV-F-800 Fuel Oil, Diesel, Grade DF-2
2.2 OTHER PUBLICATIONS
American Society for Testing and Materials (ASTM)
ASTM D 149 Standard Methods of Tests for Dielectric Breakdown Voltage and Dielectric Strength of
Electrical Insulating Materials at Commercial Power Frequencies
ASTM D 257 Standard Methods of Test for D-C Resistance or Conductance of Insulating Materials
ASTM D 412 Standard Method of Tests for Rubber Properties in Tension
ASTM D 570 Standard Methods of Test for Water Absorption of Plastics
ASTM D 635 Standard Methods of Test for Rate of Burning and/or Extent and Time of Burning of Self-
Supporting Plastics in a Horizontal Position
ASTM D 792 Standard Methods of Test for Specific Gravity and Density of Plastics by Displacement
ASTM D 910 Standard Specification for Aviation Gasolines
ASTM D 2671 Standard Methods of Testing Heat Shrinkable Tubing for Electrical Use
Page 2 SPECIFICATION RT 1330- ISSUE 3
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ISO 846 Determination of behaviour under the action of fungi and bacteria - Evaluation by visual
examination or measurement of change in mass or physical properties.
(Copies of ASTM Publications may be obtained form the American Society for Testing and Materials, 1916
Race Street, Philadelphia, Pennsylvania 19103.)
Raychem Corporation
RT-700 Harness System Chemical Agent Exposure & Decontamination
3. REQUIREMENTS
3.1 MATERIAL
The molded components shall be fabricated from a crosslinked, thermally stabilized, flame-retarded,
modified fluoropolymer material. They shall be homogeneous and essentially free from flaws, defects,
pinholes, bubbles, cracks and inclusions.
3.2 COLOR
The molded components shall be black.
3.3 PROPERTIES
The molded components and the material from which they are fabricated shall meet the requirements of
Table 1.
3.4 SYSTEMS PERFORMANCE
The performance of harness systems fabricated with this material shall satisfy the requirements of Systems
Specification RT-700.
4. QUALITY ASSURANCE PROVISIONS
4.1 CLASSIFICATION OF TESTS
4.1.1 Qualification Tests
Qualification tests are those performed on molded slabs and components submitted for qualification as
satisfactory products and shall consist of all tests listed in this specification.
4.1.2 Acceptance Tests
Acceptance tests are those performed on molded slabs and components submitted for acceptance under
contract. Acceptance tests shall consist of the following:
Visual
Dimensional Recovery
Tensile Strength
Ultimate Elongation
Heat Shock
Flammability
SPECIFICATION RT 1330- ISSUE 3 Page 3
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4.2 SAMPLING INSTRUCTIONS
4.2.1 Qualification Test Samples
Qualification test samples shall consist of twelve molded slabs, 6 x 6 x 0.075 ± 0.010 inches
(152 x 152 x 1.9 ± .25 mm) and the number of molded components specified. The molded slabs shall be
fabricated from the same lot of material and shall be subjected to the same degree of crosslinking as the
molded components.
4.2.2 Acceptance Test Samples
Acceptance test samples shall consist of specimens cut from a molded slab 6 x 6 x 0.075 ± 0.010 inches
(152 x 152 x 1.9 ± .25 mm), and molded components selected at random. The molded slab shall be
fabricated from the same lot of material and shall be subjected to the same degree of crosslinking as the
molded components. A lot of components shall consist of all molded components from the same lot of
material, from the same production run, and offered for inspection at the same time.
4.3 TEST PROCEDURES
4.3.1 Dimensions and Dimensional Recovery
Measure samples of molded components, as supplied, for dimensions in accordance with ASTM D 2671.
Then condition the samples for 10 minutes in a 250 ± 3°C (482 ± 5°F) oven, or equivalent, cool to room
temperature and remeasure.
4.3.2 Elastic Memory
Mark a 6 x 1/8-inch (152 x 3.2-mm) specimen cut from a molded slab with two parallel gauge lines 1 inch
(25 mm) apart in the central portion of the specimen. Record the distance between gauge lines as the original
length. Heat a 2-inch (51-mm) portion of the specimen including both gauge lines for 3 minutes in a 250 ±
3°C (482 ± 5°F) oven, or equivalent, remove from the oven and stretch within 10 seconds, until the gauge
lines are 4 inches (102 mm) apart. Cool the extended specimen to room temperature and release from
tension. After 24 hours at room temperature, measure the distance between the gauge lines and record as the
extended length. Reheat the portion of the specimen including both gauge lines for 3 minutes in a 250 ± 3°C
(482 ± 5°F) oven, or equivalent, and measure the distance between gauge lines; record this distance as the
retracted length.
Calculate expansion and retraction as follows:
E = Le - Lo
Lo x 100
R = Le - Lr
Le - Lo x 100
Where: E = Expansion (percent)
R = Retraction (percent)
Lo = Original Length [inches (mm)]
Le = Extended Length [inches (mm)]
Lr = Retracted Length [inches (mm)]
Page 4 SPECIFICATION RT 1330- ISSUE 3
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4.3.3 Tensile Strength and Ultimate Elongation
Test three specimens cut from a molded slab using Die D of ASTM D 412 for tensile strength and ultimate
elongation in accordance with ASTM D 412.
4.3.4 Low Temperature Flexibility
Condition three 6 x 1/4-inch (152 x 6.3-mm) specimens cut from a molded slab, along with a 1.125-inch
(28.6 mm) mandrel, in a cold chamber at -65 ± 2°C (-85 ± 4°F) for 4 hours. After completion of the
conditioning, and while the specimens are still in the cold chamber, bend each specimen around the mandrel
through not less than 360 degrees within 10 ± 2 seconds. Examine the specimens visually for cracks.
4.3.5 Heat Shock
Condition three 6 x 1/4-inch (152 x 6.3-mm) specimens cut from a molded slab for 4 hours in a 300 ± 5°C
(572 ± 9°F) mechanical convection oven with an air velocity of from 100 to 200 feet per minute past the
specimens. After conditioning, remove the specimens from the oven, cool to room temperature, and bend
through 360 degrees over a 3/8-inch (9.5-mm) diameter mandrel. Examine the specimens visually for
evidence of dripping, flowing or cracking.
4.3.6 Heat Resistance
Condition three specimens, prepared and measured in accordance with 4.3.3 for 336 hours in a 250 ± 3°C
(482 ± 5°F) mechanical convection oven with an air velocity of 100 to 200 feet per minute past the
specimens. After conditioning, remove the specimens from the oven, cool to room temperature, and test for
tensile strength and ultimate elongation in accordance with 4.3.3.
4.3.7 Corrosive Effect
Test three 1 x 1/4-inch (25.4 x 6.3-mm) specimens cut from a molded component for corrosive effect in
accordance with ASTM D 2671, Procedure A. Condition the specimens for 16 hours at 200 ± 3°C (392 ±
5°F).
4.3.8 Fluid Resistance
Immerse three specimens prepared and measured in accordance with 4.3.3 completely in the test fluids listed
in Table 1 for 24 hours at the specified temperatures. Use a volume of fluid not less than 20 times that of the
specimens. After conditioning, lightly wipe the specimens and then air-dry for 30 to 60 minutes at room
temperature. Test the specimens for tensile strength and ultimate elongation in accordance with 4.3.3.
4.3.9 Radiation Resistance
Three specimens prepared in accordance with Section 4.3.2 shall be subjected to gamma radiation for a total
dosage of 10 Mrad at a rate of less than 0.5 Mrad per hour. The specimens shall be measured for tensile
strength and ultimate elongation in accordance with Section 4.3.2.
4.4 REJECTION AND RETEST
Failure of any sample to comply with any one of the requirements of this specification shall be cause for
rejection of the lot represented. Material which has been rejected may be replaced or reworked to correct the
defect and resubmitted for acceptance. Before resubmitting, full particulars concerning the rejection and the
action taken to correct the defect shall be furnished to the inspector.
SPECIFICATION RT 1330- ISSUE 3 Page 5
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5. PREPARATION FOR DELIVERY
5.1 PACKAGING
Packaging of molded components shall be in accordance with good commercial practice. The shipping
container shall be not less than 125 pound test fiberboard.
5.2 MARKING
Each molded component shall be distinctly identified on the part and/or package with the manufacturing
name or symbol, the manufacturer’s part number, lot number, date of manufacture, and use before date.
Page 6 SPECIFICATION RT 1330- ISSUE 3
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TABLE 1
Requirement
PROPERTY UNIT REQUIREMENTS TEST METHOD
PHYSICAL
Dimensions
inches (mm)
In accordance with applicable
specification control drawing
Section 4.3.1
ASTM D 2671
Dimensional Recovery inches (mm) In accordance with applicable
specification control drawing
Elastic Memory percent 200 minimum expansion
90 minimum retraction Section 4.3.2
Tensile Strength psi (MPa) 3500 minimum (24.1) Section 4.3.3
Ultimate Elongation percent 200 minimum ASTM D 2671
Specific Gravity --- 2.0 maximum ASTM D 792
Low Temperature Flexibility
4 hours at -65 ± 2°C (-85 ± 4°F) --- No cracking Section 4.3.4
Heat Shock
4 hours at 300°C (572°F) --- No dripping, flowing or cracking
Section 4.3.5
Heat Resistance
336 hours at 250°C (482°F)
Followed by tests for:
--- --- Section 4.3.6
Tensile Strength psi (MPa) 2000 minimum (13.8) Section 4.3.3
Elongation percent 150 minimum ASTM D 2671
ELECTRICAL
Dielectric Strength
volts/mil
200 minimum
ASTM D 149
Volume Resistivity ohm-cm 1011 minimum ASTM D 257
CHEMICAL
Corrosive Effect
16 hours at 200 ± 3°C (392 ± 5°F)
---
Noncorrosive
Section 4.3.7
ASTM D 2671
Procedure A
Flammability
Average Time of Burning
seconds
15 maximum ASTM D 635
Average Extent of Burning inches (mm) 0.5 maximum (12.5)
Fungus Resistance
Followed by tests for
Tensile Strength
Elongation
Dielectric Strength
psi(MPa)
percent
volts/mil
3500 minimum
200 minimum
200 minimum
ISO 846, Method B,
56 day exposure
Water Absorption
24 hours at 23 ± 3°C (73 ± 5°F) percent 0.5 maximum ASTM D 570
SPECIFICATION RT 1330- ISSUE 3 Page 7
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TABLE 1
Requirement
(continued)
PROPERTY UNIT REQUIREMENTS TEST METHOD
CHEMICAL (continued)
Fluid Resistance
24 hours at 23 ± 3°C (73 ± 5°F) in:
Gasoline, Aviation Grade 100
(ASTM D 910)
Coolanol* 25
Followed by tests for:
---
---
Section 4.3.8
Tensile Strength psi (MPa) 3000 minimum (20.7) Section 4.3.3
Ultimate Elongation percent 150 minimum ASTM D 2671
24 hours at 50 ± 3°C (122 ± 5°F) in:
JP-5 (MIL-T-5624)
Deicing Fluid (MIL-A-8243)
Cleaning Compound
(MIL-C-43616)
5% Salt Solution (O-S-1926)
Fuel Oil, Diesel (VV-F-800, DF-2)
Followed by tests for:
Tensile Strength psi (MPa) 3000 minimum (20.7) Section 4.3.3
Ultimate Elongation percent 150 minimum ASTM D 2671
24 hours at 75 ± 3°C (167 ± 5°F) in:
Hydraulic Fluid (MIL-H-5606)
Skydrol* 500
Lubricating Oil (MIL-L-2104)
Lubricating Oil (MIL-L-7808)
Followed by tests for:
--- --- Section 4.3.8
Tensile Strength psi (MPa) 3000 minimum (20.7) Section 4,3.3
Ultimate Elongation percent 150 minimum ASTM D 2671
Fluid Resistance
5 hours at 23 ± 3°C (73± 5°F)
MIL-D-50030 Decontaminating
Agent, DS-2
MIL-D-12468 Decontaminating
Agent STB
--- --- Section 4.3.8
Tensile Strength psi (MPa) 3500 minimum (24.1) Section 4.3.3
Ultimate Elongation Percent 150 minimum ASTM D 2671
*Trademark, Monsanto Company
NUCLEAR
Radiation Resistance
Followed by tests for:
Tensile Strength
Ultimate Elongation
psi (MPa)
percent
3500 minimum (24.1)
150 minimum
Section 4.3.9
