1、I INCH-POUND I MIL-C-81814C 17 Augst 1990 SUPERSEDING 10 April 1978 MIL-C-818148 MILITARY SPECIFICATION CLOTH, TI.IILL, ARAMID, HIGH TEMPERATURE RESISTANT This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification cover
2、s high temperature resistant aramid twill cloth used in the manufacture of 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 specification to the extent specified herein. Unles
3、s otherwise specified, the issues of these documents are those listed in the issue of the Department of Defense Index of Specifications and Standards (DODISS) and supplement thereto, cited in the sol ici tation (see 6.2.f). 0 SPECIFICATIONS FEDERAL PPP-P-1133 Packaging of Synthetic Fiber Fabrics Mi
4、1 i tary MIL-T-43636 STANDARDS FEDERAL FED-STD-4 FED-STD-191 Thread, Aramid Glossary of Fabric Imperfections 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 Engineeri
5、ng and Standardization Department (Code 531, Naval Air Engineering Center, Lakehurst, NJ 08733-5100, by using the Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. _ - _- AMSC N/A FSC Approved for public release; distribution is iinlim _
6、-I DISTRIBUTION STATEMENT A: 8305 ted. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-81814C STANDARDS (Conti nued 1 MILITARY MI L-STD- 105 Sampl ing Procedures and Tables for Inspec- tion by Attributes (Unless otheiwi se ,indicated, copies of
7、 federal and mi 1 i tary specifications, and handbooks are available from the Standardization Documents Order Desk, Bldg 40, 700 Robbins Avenue, Philadelphia, PA 19111-5094. * 2.1.2 Other Governnien-t,-&oc,!mgnt-and publ cations. The fol lowing other Government documents and publications form a part
8、 of this document to the extent specified herein. Unless otherwise specified, the issues are those cited in the solicitation. FEDERAL TRADE COMMISSION Rules and Regulations Under the Textile Fiber Products Identification Act * 2.2 Non-Government publications. The following document forms a part of t
9、his document to the extent specified herein. Unless otherwise specified, the issues of the documents which are DOD adopted are those listed in the issue of the DODISS cited in the solicitation. Unless otherwise specified, the issues of documents not listed in the DODISS are the issues of the documen
10、ts cited in the solicitation (see 6.2.f). AMERICAN ASSOCIATION OF TEXTILE CHEMISTS AND COLORISTS Technical Manual of the AATCC Method Number 76-1969 Electrical Resistivity of Fabrics (Application for copies of the AATCC Manual should be addressed AATCC National Headquarters, P.O. Box 12215, Research
11、 Triangle Park 27709. ) (Nongovernment standards and other publ ications are normally ava These the oiqanizations which prepare or distribute the documents. o the NC lable from documents also may be available in or through libraries or other informational services.) * 2.3 Order of prgebgn.ce. In the
12、 event of a conflict between the text of this specification and the references cited herein (except for related detail specifications, specification sheets or MS standards), the text of this document takes precedence. applicable laws and regulations unless a specific exemption has been obtained. , N
13、othing in this document, however, supersedes 3, REQUIREMENTS 3.1 Standard sam4j.g. The cloth shall match the standard sample with respect to all characteristics for which the standard sample is referenced (see 6.3). 7 L Provided by IHSNot for ResaleNo reproduction or networking permitted without lic
14、ense from IHS-,-,-MIL-C-8LLLIC 83 9999906 09LIq657 9 = - MIL-C-81814C 3.2 Materials. The cloth shall be produced from a high temperature aramid filament yarn. The yarn shall not char at a temperature less than 357C (675F). e 3.3 Heave. The weave shall be a 2/2 right hand twill. 3.4 Color. Unless oth
15、erwise specified, the color of the finished cloth shall be USAF Sage Green Shade No. 1565. The color shall be obtained by the use of melt spun solution dyed fibers. * 3.4.1 Matching. The color and appearance of the dyed and finished cloth shall match the standard sample when viewed under filtered tu
16、ngsten lamps which approximate artificial daylight having a correlated color temperature of 7500“ f 200“K, with illumination of 100 t 20 foot candles, and shall be a good match to the sample under incandescent lamplight at 2300“ * 200 K. * 3.4.2 Colorfastnsc. The dyed and finished cloth, shall show
17、fastness to light and to laundering equal to or bettet- than the standard sample. standard sample is avai1abl.e the cloth shall be equal to or better than a rating of “good“ when tested as specified in 4.5. When no 3.5 Physical requiremEnri. The physical requirements of the finished TABLE I. Physica
18、l properties. cloth (3.6) shall be as specified in Table I when tested as specified in 4.5. I IDenier/fi lament (noniinal) Turns per inch Warp Fi 1 1 i ng Yarns per inch, min Warp Fi 1 1 i ng Weight, ozs, per sq. yd. Breaking strength, lbs, min Ravel strip method Warp Fi 11 ing Tongue met hod Warp F
19、i 1 1 i ng percent, max Warp Fi 1 1 i ng Tearing strength, lbs, min Shrinkage after ten (10) launderings, Requirements _- 2001 1 O0 4 min - 8 max 4 min - 8 max 98 90 5.2 min - 5.6 max 185 160 13 13 2.0 2 .o 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from I
20、HS-,-,-flIL-C-Ll14C 83 m 9779706 0444658 O m MIL-C-81814C TABLE I. Physical properties (cont.). Characteristic I Reqi rements Air permeability, CU ft air/min/ft2 at 1/2 inch water, max Cewability, seam efficiency, percent, min Flame resistance (warp direction only) After-flame time, seconds, max Aft
21、er-glow time, seconds, max Char length, inches max Average Si ngl e de termi nation 12 80 1 14 3.5 4.0 3.6 Finishing. The cloth shall be desized, scoured and heat set. * 3.6.1 Antistatic finish. The cloth shall be given a durable antistatic finish (6.4 and 6.5) so that the maximum resistivity of any
22、 one sample before dry cleaning shall be 3.0 x 10” ohms per square and the maximum resistivity of any sample after five dry cleanings shall be 8 x 10” ohms per square when tested as specified in 4.5. Only those chemical treatments already approved by the appropriate medical service and so listed in
23、the invitation for bids or request for proposal shall be considered acceptable for the related procurement (6.5) when tested as specified in 4.5. 3.6.2 -_-._- Nonfibrous material. Prior to the application of the antistatic finish the cloth shall contain no more than 1.0 percent starch and protein in
24、cluding chloroform-soluble and water-soluble material when tested as specified in 4.5. 3.6.3 Curling. The finished cloth shall lie flat, without distortion, and show no evidence of curling when tested as specified in 4.5.1. 3.7 Hidth. The width of the finished cloth shall be as specified which shall
25、 be the minimum acceptable width (inclusive of the selvage) (see 6.2). 3.8 Length and put up. Unless otherwise specified (see 6.2d), the cloth shall be furnished in continuous lengths, each not less than 40 yards. Each length shall be put up on rolls as specified in PPP-P-1133. 3.9 Fiber identificat
26、ion. -. .- Each roll of cloth shall be labeled for fiber content in accordance with the Textile Fiber Products Identification Act. 3.10 Face identification The face side of the cloth shall be identified by applying a stamping on that side of the cloth with the word “Face” at each end of the roll. 3.
27、11 Workmanship, The finished cloth shall conform to the quality and grade of product established by this specification. shall not exceed the.acceptable quality levels. The occurrence of defects 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- c - M
28、IL-C-LL4C 3 777770b 044LIb57 2 MIL-C-81814C 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.
29、Except as otherwise specified in the contract or purchase order, the contractor may use his own or any other facilities suitable for the perforinance of the inspection requirements specified herein, unless disapproved by the Government. any of the inspections set forth in this specification where su
30、ch inspections are deemed necessary to assure supplies and services confoiin to prescribed requi remen t s. The Government reserves the right to perform * 4.1.1 - ResponsibilitlLfo I-_- compliance. _ I All items shall meet all require- ments of Sections 3 and 5. The inspection set forth in this spec
31、ification 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 ensuring that all products or supplies submitted to the Government for acceptance c
32、omply 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 Govern
33、ment to accept defective material, * 4.1.2 -I-. Certificate of compliance. - Where certificates of compliance are submitted in accordance with 4.5, 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
34、 the certification. e 4.2 Classification - of , - inspections. . - -.-i lll_ The inspections specified classified as quality conformance inspections. * 4.3 Qual i ty _confor.maiice inspection. The qual shall consist of the inspections described in 4.3.2 end item tests of 4.5. ty conformance through
35、4.3.3.4 4.3.1 Insrrec.t_l_co_nb_i_t_i_ons Unless otherwise specified, al 1 tions shall be performed in accordance with MIL-STD-105. herein are nspection and the i nspec- 4.3.2 Component and inaterial iiisp-eLtLo?. In accordance with 4.1 above, components and materials shall be tested in accordance w
36、ith all the require- ments of referenced specifications, drawings and standards unless otherwise excluded, amended, modified or qualified in this specification or applicable purchase documents. 4.3.3 Examination of the end item. Examination of the end item shall be in accordance with the provisions
37、of 4.3.3.1 through 4.3.3.4. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-C-LL4C 3 777770b 044Libb0 7 MIL-C-81814C 4.3.3.1 Yard-!g:y-aLd _I exaLinatign Each roll in the sample shall be examined on the face side only. Hhen the total yardage i
38、n the roll does not exceed 100 yards the entire yardage in the roll shall be examined. When the total yardage in the roll exceeds 100 yards, only 100 yards shall be examined. All defects as defined in Section III of FED-STD-4 which are clearly noticeable at normal inspection distance (3 feet) shall
39、be scored and assigned demerit points as listed in 4.3.3.1.1 (except that only those slubs and knots which exceed the limits shown on figure 1 of FED-STD-4 shall be scored), No linear yard (increments of 1 yard on the measuring device of the inspection machine) from any one roll within the sample sh
40、all be penalized more than 4 points. The sample size shall be.20 rolls selected from 20 con- tainers. The lot shall be unacceptable if the points per 100 square yards of the total yardage examined exceeds 50 points. The lot shall be unacceptable if the po nts per 100 square yards of two or inore ind
41、ividual rolls exceed 75 points. f one roll exceeds 75 points per 100 square yards, a second sample of 20 rol s shall be examined cnly for individual roll quality examination. The lot shall be unacceptable if one or more rolls in the second sample exceeds 75 points per 100 square yards. Point computa
42、tion for lot quality and individual rol 1 qual i ty shall be as fol lows: Total points scored in sample x 3600 _- = Points per Contracted width of cloth (inches) x total yards inspected 100 square yards * 4.3.3.1.1 Demerit points. Demerit points shall be assigned as follows: Defects 3 inches or Defe
43、cts exceeding 3 Defects exceeding 6 exceeding 6 inches exceeding 9 inches ess in any dimension One point nches, but not Two points in any direction nches, but not Three points in any direction Defects exceeding 9 inches in any dimension Four points NOTE: The end item examinatim shall include the fol
44、lowing additional defects: Two or more cont Two or more cont Two or more cont guous missing picks. guous broken picks. guous strip backs. Two continuous or more than th of one yard. The following defects, when present, sha in which they occur: Baggy, ridgy or wavy cloth. Width less than specified. U
45、neven weavi ng . ee single t 1 be scored ght ends across the width four points for each yard 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-c MIL-C-BLL4C 3 W 7999906 044466L O W MIL-C-81814C The following conditions shall not be scored as defects:
46、 Shade barre and striation inherently characteristic of yarn varia- tion not seriously affecting appearance. Single pick partially or completely missing. Single stripback in warp or fuzz ball no greater than that shown in figure 1 of FED-STD-4. Single tight end. Missing end less than one yard in len
47、gth. In addition, all twenty rolls of the inspection sample shall be examined for “tight selvage“ by placing each roll on a table and partially unrolling the cloth. Two or more rolls with this condition can reject the entire lot. 4,3.3.2 Examination for length. 4.3.3.2.1 Individua-1 rol 1s During th
48、e yard-by-yard examination, each roll in the sample shall be examined for length. Any length found to be less . than the minimum specified or more than two yards less than the length marked on the ticket shall be considered a defect with respect to length. The lot shall be unacceDtable if two or mov
49、e rolls in the sample are defective with respect to length. total of the actual lengths of rolls in the sample is less than the total of 4.3.3.2.2 Total yardage in sample. The lot shall be unacceptable if the the lengths marked on the ticket. 4.3.3.3 Examination for shade. During the yard-by-yard examination, . each roll in the sample shall be examined for shade. Any roll in the sample off shade (shaded side to side, s
