MIL-T-68410
3.5 Weight
3.5.1 As received. The as-received weight of the tape or sheet shall include the weight of the Holland cloth or polyethylene, and shall be as specified in table I, when tested as specified in 4.6.2.
3.5.2 After oven aging. The weight of the as-received sample as determined in 3.5.1 shall not vary by more than +10 percent after oven aging (see 4.4.2), when tested as specified in 4.6.2.
3.6 Physical properties. The physical properties shall conform to the requirements of table IV, based on tests made before removal of the Holland cloth or polyethylene (see 4.6.3 and 4.6.4).
TABLE IV. Physical properties.
Property |
As received |
After oven aging (see 4.3.2) |
Compressibility (percent) Recovery (percent) (min) Low temperature resistance (percent) (min) |
20-35 90 40 |
15-40 80 No requirement |
3.7 Adhesive strength. The adhesive shall not transfer to the Holland cloth or polyethylene, nor reveal bare spots when unrolled. When applied to an aluminum alloy panel, as specified in 4.6.5, it shall be capable of supporting a weight of 3 pounds per inch of width for a period of at least 1 minute.
3.8 Accelerated crazing. The tape and sheet shall not contain ingredients that will cause MIL-P-8184 acrylic, MIL-P-5425 acrylic, or MIL-P-83310 polycarbonate plastic sheet to craze or crack when tested as specified in 4.6.6.
3.9 Identification of product. Each roll of tape shall be marked or tagged, and each sheet shall be marked in a permanent and legible manner with the information specified in 5.3.
3.10 Water vapor transmission rate. The average water vapor transmission rate (WVTR) of the tape, when tested as specified in 4.6.7 shall not exceed 4.0 gms./100 sq inch/24 hours.
3.11 Workmanship. The tape and sheet shall conform to the quality and grade of product established in this specification. Occurrence of defects shall not exceed the applicable quality levels.
4. QUALITY ASSURANCE PROVISIONS
4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the contractor is responsible for the performance of all inspection requirements (examinations and tests) as specified herein. Except as otherwise specified in the contract or purchase order, the contractor may use their own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to ensure that the supplies and services conform to prescribed requirements.
4.1.1 Responsibility for compliance. All items must meet all requirements of sections 3 and 5. The inspection set forth in this specification shall become a part of the contractor's overall inspection system or quality program. The absence of any inspection requirements in the specification shall not relieve the contractor of the responsibility of ensuring that all products or supplies submitted to the Government for acceptance comply with all requirements of the contract. Sampling inspection, as part of manufacturing operations, is an acceptable practice to ascertain conformance to requirements; however, this does not authorize submission of known defective material, either indicated or actual, nor does it commit the Government to accept defective material.
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