A-A-52169 Insulation; Sound, Vibration, And ThermalThis CID covers the physical, chemical, and performance characteristics of the composite material used to make insulating pads for use on the High Mobility Multipurpose Wheeled Vehicle HMMWV series of vehicles and for other similar applications. The insulating pads are used as a thermal, sound, and vibration barrier. The insulating pad is made of five layers of material consisting of the following components: a deep twist outer vinyl wear surface with a cloth reinforcement backing; a sound barrier layer; a closed cell acoustical and thermal foam insulation layer; a high temperature needle mat thermal blanket layer; and a fiberglass cloth reinforced vinyl and mylar backing see figure 1.

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A-A-52169B

TABLE VI. Insulating pad composite.

Characteristic

Requirement

Flammability Temperature reduction Tensile strength

Tear strength

Cold crack

Composite thickness

See table II.

177 C to 60 C.

20 kg/sq. cm minimm.

71 kg/mm thickness.

Good to -46 C minimum when bent 180 around a 25 mm mandrel.

consistent within 3 mm.

2.4 Identification. Identification and marking of parts made from this insulating pad composite material shall be permanent and legible and shall include as a minimum the following:

a. Name and address of part manufacturer. b. Contract number.

c. Date of manufacture.

d. Part or identification number (PIN) (see 5.2 and 5.3).

3. QUALITY ASSURANCE PROVISIONS.

3.1 Responsibility for inspection. The contractor is responsible for the performance of all inspections

(examinations and tests).

3.2 Contractor certification. The contractor shall certify and maintain substantiating evidence that the product offered meats the salient characteristics of this commercial item description, and that the product conforms to the producer's own drawings, specifications, workmanship standards, and quality assurance practices. Items with known defects shall not be submitted for Government acceptance. The Government reserves the right to require proof of such conformance prior to the first delivery and thereafter as may be otherwise provided for under the provisions of the contract.

4. PRESERVATION, PACKAGING, PACKING, LABELING, AND MARKING. Preservation, packaging, packing, labeling, and marking for the desired level shall be as specified in the contract (see 5.2).

5. NOTES.

(This section contains information of a general or explanatory nature that may be helpful, but is not mandatory.)

5.1 Address for obtaining copies of referenced documents.

5.1.1 Government specifications and standards. Copies of FED-STD-595 "Colors Used in Government Procurement" and MIL-I-16411 "Insulation Felt, Thermal, Glass Fiber"; are available from the Defense Printing Service Detachment Office, Bldg. 4D (Customer Service), 700 Robbins Avenue, Philadelphia, Pennsylvania 19111-5094.