1、MIL-C-87356 83 W 7777906 0433378 5 W MIL-C-87156 6 January 1981 H-S?-/. MILITARY SPECIFICATION CLOTH, PARACHUTE, ARAMID, INTERMEDIATE MODULUS This specification is approved for use by all Departments, and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers canopy fab
2、rics made from intermediate modulus aramid yarn for fabrication of parachutes. 1.2 Classification. The cloths shall be of the following types as specified (see 6.2) : Type I - 3.0 ounces per square yard, maximum weight. Type II - 2.25 ounces per square yard, maximum weight. Type III - 2. O ounces pe
3、r square yard, maximum weight. 2. APPLICABLE DOCUMENTS 2.1 Issues of documents. The following documents of the issue in effect on date of invitation for bids or request for proposal, form a part of this specification to the extent specified herein, SPECIFICATIONS FEDERAL PPP-P-1133 Packaglng and Pac
4、king of Synthetic Fiber Fabrics STANDARDS FEDERAL FED-STD-191 Textile Test Methods MILITARY MIL-STD-105 Sampling Erocedures and Tables for Inspection by Attributes Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should
5、 be addressed to: AFWAL/MLSA, WPAFB, OH 45433 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. e c -, FSC 8305 THIS DOCUMENT CONTAINS (/ PAGES. Provided by IHSNot for ResaleNo reproduction or networking permi
6、tted without license from IHS-,-,-(Copies of specifications, standards, drawings, and publications required by contractors in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer .) 2.2 Other publications. The followi
7、ng document forms a part of this speci- fication to the extent specified herein. Unless otherwise indicated, the issue in effect on date of invitation. for bids or request for proposal shall apply Textile Fiber Products Identification Act (Copies may be obtained from the Federal Trade Commission, Wa
8、sh.ington, DC 20580. ) 3. REQUIREMENTS 3.1 First article. When specified (see 6.2), the contractor shall furnish one sample unit for f irst article inspection and approval (see 4.5 and 6.4) . 3.2 Material. The yarn used shall be an intermediate modulus aramid yarn (see 6.5). The material shall not c
9、arbonize below 779F (415OC). 3.2.1 Denier and twist. The yarn used in the manufacture of the cloth shall be of the denier and twist specified in Table I, A twist designation of zero (O) signifies that no twist is to be added to the producers twist as delivered. 3.3 Weave. The weave pattern for all t
10、ypes of cloth shall be a plain weave, 3.4 Physical properties. The physical properties of the finished cloth shall conform to Table I. TABLE I. Physical requirements. Property Weight (oz/sq yd) (maximum) Breaking strength (lb/inch) (minimum) warp filling at 1/2 inch water pressure) warp f ill ing Ya
11、rn denier Air permeability (CU ft air/min/sq ft Yarns per inch (min) I Type 1 3. O 350 350 50 48 48 2 O0 to 90 Type II 2.25 250 2 50 100 to 175 40 40 200 Type III 2.0 230 220 50 to 90 36 34 200 4 a a a Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
12、MIL-C47156 TABLE I. Physical properties - co.ntinued Property Type II Type 1 Yarn ply warp filling warp filling Yarn twist, per inch single single 5.0 O single single 4.0 O Type -III f single singie o. O 3.5 Color. The color of the cloth shall be as specified by the contracting . officer (see 6.2). 3.6 Dimensions. 3 6.1 Width. Unless otherwise specified, the overall width of the finished cloth shall be 36.5 8305-0710 *US GOVERNMENT PRINTING OFFICE: 198t-703-023/674 11 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
