1、MI L-C-81393B 17 March 1988 SUPERSEDING 15 May 1972 MIL-C-81393A MILITARY SPECIFICATION CLOTH, KNITTED, POLYAMIDE, HIGH TEMPERATURE RESISTANT, SIMPLEX, JERSEY This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification c
2、overs the requirements for a high temperature resistant aromatic polyamide jersey knitted cloth used in aeronautical clothing. 2. APPLICABLE DOCUMENTS 2.1 Government documents. * 2.1.1 Specifications and standards. The following specifications and standards form a part of this speEification to the e
3、xtent specified herein. Unless otherwise specified, the issues of these documents shall be those listed in the issue of the Department of DefenseIndex of Specifications and Standards (DODISS) and supplement thereto, cited in the solicitation. SPECIFICATIONS Federal PPP-P-1133 Packaging and Packing o
4、f Synthetic Fi ber Fabrics STANDARDS Federal FED-STD-191 Textile Test Methods Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Systems Engineering and Standardization Department (Code 531, Naval
5、Air Engineering Center, Lakehurst, NJ 08733-5100, by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. THIS DOCUMENT CONTAINS 0 PAGES. FSC AMSC N/A - DISTRIBUTION STATEMENT A. Approved for pub1 ic-release; distri
6、 bution is un1 im a 8305 ted. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-BL393B 3 m 997990b 0404837 9 m MIL-C-81393B STANDARDS (Continued) Mi 1 i tary MIL-STD-105 Sampling Procedures and Tables for Inspection by Attributes MI L-STD- 1 49 1
7、 Glossary of Knitting Imperfections * 2.1.2 Other Government document. The fol lowing other Government document forms a part of this specification to the extent specified herein. Unless otherwise specified, the issue shall be that in effect on the date of the solicitation. PUBLICATIONS FEDERAL REGUL
8、ATIONS Rules and Regulations Under the Textile Fiber Products Identification Act (Application for copies should be addressed to the Federal Trade Commis- sion, Washington, DC 20580.) “(Copies of specifications, standards and other Government documents required by contractors in connection with speci
9、fic acquisition functions should be obtained from the contracting activity or as directed by the contracting activity. 1 * 2.3 Order of precedence. In the event of a conflict between the text of this specification and the references cited herein (except for associated detail specifications, specific
10、ation sheets or MS standards), the text of this specification shall take precedence. Nothing in this specification, however, shall supersede applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 Standard sample. The finished cloth shall match the standard
11、 sample for shade and shall be equal to or better than the standard sample with respect to all characteristics for which the standard sample is referenced (see 6.3). 3.2 Materials. 3.2.1 Synthetic yarn. The cloth shall be knit from a high strength, non-melting, aromatic polyamide staple yarn. a temp
12、erature less than 357C (675F) when tested as specified in 4.4. The yarn shall not carbonize at 3.3 Construction. The knit shall be jersey construction made on a 24 gauge simplex machine, with a front bar of 4-513-211-0/2-3 and a back bar of 1 -0/1-2/3-4/3-2. 2 Provided by IHSNot for ResaleNo reprodu
13、ction or networking permitted without license from IHS-,-,-MIL-C-L373B 3 m 7979706 0904838 O m MI L-C-81393B 3.4 Physical requirements. The finished knit cloth shall conform to the requirements specified in Table I. TABLE I. Physical properties. Characteristics Staple denier, nomi na1 Staple length,
14、 inch Linear density of yarn, Tex units, nominal Weight, oz. per square yard Texture per inch each side Wal es Courses, min. Stretch, percent Length, Wal es Width, Courses Flame resistance - Wales direction Flaming time, seconds, max. Char length, inches, max. Requirements 1.5 1.5 - 2.0 11 9.0 - 10.
15、0 36 - 39 28 20 - 35 60 - 80 2.0 4.0 5.0 - 8.0 3.5 Color. The color shall be as specified by the procuring activity. The color shall be obtained by the use of melt solution dyed fibers. * 3.5.1 Matching. The color and appearance of the dyed cloth shall match the standard sample when viewed under fil
16、tered tungsten lamps which approximate artificial daylight having a correlated color temperature of 7500 - + 200K, with illumination of 100 2 20 foot candles, and shall be a good match to the sample under incandescent lamplight at 2300 200K. 3.5.2 Colorfastness. The dyed cloth shall show colorfastne
17、ss to light and laundering equal to or better than the standard sample when tested as specified in Table V. When no standard sample is available, the dyed cloth shall show good colorfastness to light and laundering when tested as specified in Table V. 3.6 Width. The minimum acceptable width of the f
18、inished cloth shall be as speci f i ed. 3.7 Length and put-up. Unless otherwise specified, the cloth shall be furnished in continuous lengths, of not less than 30 yards, and shall be put up in rolls as specified in PPP-P-1133. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted wi
19、thout license from IHS-,-,- MIL-C-BL373B 83 m 737770b 0404837 2 m MI L-C-81393B 3.8 Fiber identification. Each roll shall be labeled, ticketed and invoiced for fi ber content in accordance with the Textile Fiber .Products Ident if i cati on Act. product established by this specification. not exceed
20、the acceptable quality levels. 4. QUALITY ASSURANCE PROVISIONS 3.9 Workmanship. The finished cloth shall conform to the quality of The.occurrence of defects shal + 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the contractor is responsible Por the p
21、erformance of all inspection requirements as specified herein. Except as otherwise specified in the contract or purchase order, the contractor may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. G
22、overnment reserves the right to perform any of the inspections set forth .in the specification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. The * 4.1.1 Responsi bi 1 i ty for compliance. Al 1 i tems must meet al 1 requirements of Sec
23、tions 3 and 5. The inspection set forth in this specification shall become a part of the contractors overall inspection system or quality program. The absence of any inspection requirements in the specification shall not relieve the contractor of the responsibility of assuring that all products or s
24、upplies submitted to the Government for acceptance comply wi th al 1 requirements of the contract. Sampl i ng in qual i ty conformance does not authorize submission of known defective material, either indicated or actual, nor does it commit the Government to acceptance of defect i ve mater i al . su
25、bmitted in accordance with 4.4,. they shall contain verifiable actual test and inspection data. The Government reserves the right to inspect and test the cloth to verify the validity of the certification. 4.1.2 Certificate of compliance. Where certificates of compliance are 4.2 Classification of ins
26、pections. The inspections specified herein are classified as quality conformance inspections. * 4.3 Quality conformance inspection. The quality conformance inspection shall consist of the inspe.ctions described in 4.3.2 through 4.3.2.3.3 and the end item tests OP 4.4. * 4.3.1 Inspection conditions.
27、Unless otherwise specified, all inspections shall be performed in accordance with the test conditions specified in 4.3.2 through 4.3.2.3.3 and the end item test of 4.4. exam 4.3 na t 2 Examination of the end item. Defects found during this on shall be classified in accordance with 4.3.2.1 through 4.
28、3.2.3. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-C-BL393B 83 W 777770b 0404840 7 Hole, cut, tear, smash. Mend or snag. Missing yarn or miss knit. Abrasion mark resuiting in weak area. Heavy or thin yarn, moice or less than twice the norm
29、al thickness. Slub, slug or kink. Embedded crease. Any knot extending above the face of the fabric. Knitting tension (stretch) too tight or too loose. Spot or stain (any). Barre or tiger stripe. MI L-C-813938 4.3.2.1 Yard-by-yard exami nation. The requi red yardage of each rol 1 shall be examined an
30、d defects clearly noticeable at normal inspection distance (3 feet) shall be classified as listed in Table II and as stated in MIL-STD-1491. All defects found shall be counted regardless of their proximity to each other except where two or more defects represent a single local condition of the cloth
31、,in which case only the more serious defects shall be counted. A continuous defect shall be counted as one defect for each yard or fraction thereof in which it occurs. linear yard, The acceptable quality level (AQL) shall be 6.5 defects per 100 units (yards). II of MIL-STD-105. The lot size shall be
32、 expressed in units of one yard 3 each. The number of rolls selected shall be in accordance with Table IV. An approximately equal number of yards shall be examined in each roll in the sample. The sample unit shall be one The sample size shall be in accorance with Inspection Level TABLE II. Defects.
33、TABLE III. Overall defects. Off shade. Width less than specified. Cut edge is not parallel to wales in finished cloth. Overall uncleanness. Uneven knitting throughout the roll. Not labeled in accordance with the Textile Fiber Products Identi f i cat i on Act. Provided by IHSNot for ResaleNo reproduc
34、tion or networking permitted without license from IHS-,-,-MIL-C-L393B 83 9999906 040484L O MI L-C-813938 TABLE IV. Sample size. . Sample Size Maximum Number of Lot size, yardage (Rol 1s) Defects Acceptable in Sample up to 1,200 3 O 1,201 up to and including 3,200 5 O 3,201 up to and including 10,000
35、 8 O 10,001 up to and including 35,000 13 O 35,001 up to and including 150,000 . 20 1 150,001 and over 32 2 t - 1/ - If a lot contains fewer than three rolls, each roll in the lot shall be examined . 4.3.2.3 Examination for length. 4.3.2.3.1 Individual rolls. During the yard-by-yard examination each
36、 roll shall be examined for gross length. Any gross length found to be less than the minimum specified or more than 2 yards less than the gross length marked on the ticket shall be considered a defect with respect to length. sample unit shall be one roll. The lot shall be unacceptable if two or more
37、 rolls in the sample are defective with respect to length. The 4.3.2.3.2 Total yardage in sample. The lot shall be.unacceptab1e if the total of the actual gross lengths of rolls in the sample is less than the total of the gross lengths marked on the roll tickets. The rolls examined shall be those se
38、lected for the examination of individual rolls. 4.3.2.3.3 Examination for compliance with Textile Fiber Products Identification Act. During the yard-by-yard examination, each roll in the sample shall be examined for conformance to the Textile Fiber Products Identification Act. be a defect. occur. Ea
39、ch roll not labeled in accordance with this act shall The lot shall be unacceptable if two or more of these defects 4.3.3 Examination of preparation for delivery requirements. An examination shall be made in accordance with the provision of PPP-P-1133 to determine that packaging, packing and marking
40、 requirements of Section 5 of this specification are complied with. 4.4 Testing of the end item. The methods of testing specified in FED-STD-191, wherever applicable, and as listed in Table V and the following subparagraphs shall be followed. The physical values specified in Section 3 apply to the r
41、esults of the determinations made on a sample unit for test purposes as specified in the applicable test methods. The sample unit shall be 2-1/2 continuous yards full width of the finished cloth. The lot size shall be expressed in units of 1 yard. The lot shall be unacceptable if one or more sample
42、units fail to meet any test requirement specified. All test reports shall contain the individual value utilized in expressing the final result. The sample size (number of sample units) shall be in accordance with the fol lowing: 6 Provided by IHSNot for ResaleNo reproduction or networking permitted
43、without license from IHS-,-,-MIL-C-81393B Lot size, yards Sample size 800 or less 801 up to and including 22,000 22,001 and over TABLE V. Test. methods. Characteristic Mat er ip 1 i dent i fi cat i on Carbon i zat i on poi n t Melt solution dyed Colorfastness to Staple Li near dens i ty Height Textu
44、re Stretch - Flame resistance PH Laundering Light Denier Length Requirement paragraph - 3.2.1 3.2.1 , 3.5 3.5.2 I 3.5.2 Table I Table I . Table I Table I . Table I , = Table I . Table I - Table I = 2 3 5 Test method - 1/ - 1/ - 1/ 5610 5660 21 - 1/ - 1/ i/ 5041 5070 4.3.1 5903 281 1 - 1/ - 2/ Unless
45、 otherwise stated, a certificate of compliarce shall be submitted and will be acceptable for the stated requirements. Except that the suppliers submission shall be compared with the standard sample after six hours and evaluation made at this point. 4.4.1 -Test for stretch. . 4.4.1.1 -Test specimens.
46、 The test specimen shall be a rectangle 4 inches by not less than 5 .inches. The long dimension shail be parallel to the length (wales) of the cloth for length tests and parallel to the width (courses) for width tests. The test specimen shall be taken no nearer the selvage than 1/10 the width of the
47、 cloth. Two parallel lines, 3 inches apart shall be drawn at right angles to the long dimension of the specimen. In addition, a line shall be drawn parallel to the long dimension of the specimen and 1 inch in from either edge for properly aligning the specimen in the jaws. apparatus wherein the spec
48、imen is held between two clamps. upper clamp shall be such that one gripping surface or jaw shall be an integral part of the rigid frame of the clamp. The face of the moveable jaw shall measure 1 inch by 1 inch and the face of the fixed jaw shall measure 1 inch by 1-1/2 or more inches with the long
49、dimension perpendicular to the direction of application of the load. and when weight is attached, shall weigh a total of 6 pounds. have smooth gripping surfaces, sufficiently flat and parallel to prevent slipping of the specimen during the test. 7 4.4.1.2 Test apparatus. The test device (Figure 1) shall be an The design of the The lower clamp shall have similar jaws The jaws shall Provided by IHSNot for ResaleNo reproduction o
