1、 The following commercial specification is adopted from the federal specification. Revision A includes all known accepted revisions, amendments, notices, and Department of Defense (DoD) engineering changes previously developed for this item. Revisions B and forward include changes adopted to reflect
2、 technology and design evolution. CORD, POLYESTER, CORELESS The Parachute Industry Association makes this document available for use by Industry and Government organizations that wish to apply this specification to their products. 1. SCOPE 1.1 Scope. This specification covers braided polyester corel
3、ess Parachute Cord. 1.2 Classification. The cord shall be of the following types as specified (see 6.1). Type I - 180 feet per pound Type II - 120 feet per pound Type III - 900 feet per pound 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in Sections 3 and 4
4、of this specification. This section does not include documents cited in other sections of this specification nor is it recommended for additional information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all
5、 specified requirements of the documents cited in Sections 3 and 4 of this specification, whether they are listed or not. 2.2 Government publications. 2.2.1 Government publications. The following Government publication forms a part of this document. FEDERAL TRADE COMMISION (FTC) 16 CFR 303 - Rules a
6、nd Regulations under the Textile Fiber Products Identification Act (Copies are available online at www.ftc.gov or from the Federal Trade Commission, 600 Pennsylvania Avenue, N.W. Washington, DC 20580-0001. Electronic copies may also be obtained from www.access.gpo.gov/.) PIA-C-2754D 29 July 2015 Sup
7、erseding PIA-C-2754C 07 December 2011 DISTRIBUTION STATEMENT: All Rights Reserved. No Part of this publication may be reproduced without prior written permission from Parachute Industry Association. Additional copies may be purchased on-line from PIA Specifications and Products at: . Copyright Prot
8、ected: Do Not Copy!PIA-C-2754D Page 2 of 13 2.3 Non-government publications. The following documents form a part of this document. AMERICAN ASSOCIATION OF TEXTILE CHEMISTS AND COLORISTS (AATCC) AATCC 16.2 - Colorfastness to Light: Carbon-Arc AATCC 16.3 - Colorfastness to Light: Xenon-Arc AATCC 20A -
9、 Fiber Analysis: Quantitative AATCC 61, 1A - Colorfastness to Laundering; Accelerated AATCC 81 - pH of Water-Extract from Wet Processed Textiles AATCC 192, Option A - Weather Resistance of Textiles: Sunshine-Arc Lamp Exposure with and without wetting AATCC Evaluation Procedure: - 1 Gray Scale for Co
10、lor Change - 2 Gray Scale for Staining - 8 AATCC 9-Step Chromatic Transference Scale - 9 Visual Assessment of Color Difference Textiles (Application for copies should be addressed to: AATCC National Headquarters, P.O. Box 12215, Research Triangle Park, NC 27709-2215. Electronic copies may be obtaine
11、d from www.aatcc.org.) ASTM INTERNATIONAL (ASTM) ASTM D629 - Standard Test Methods for Quantitative Analysis of Textiles ASTM D1776 - Standard Practice for Conditioning and Testing Textiles (Copies should be obtained from ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959. E
12、lectronic copies may be obtained from www.astm.org/.) AMERICAN SOCIETY FOR QUALITY (ASQ) ANSI/ASQ Z1.4 - Sampling Procedures and Tables for Inspection by Attributes (Copies are available online at: www.asq.org or from the American Society for Quality, 600 North Plankinton Avenue, Milwaukee, WI 53203
13、. Electronic copies may be also obtained from www.access.gpo.gov/.) PARACHUTE INDUSTRY ASSOCIATION PIA-TEST METHOD-6004 - LENGTH PER UNIT WEIGHT; CORDAGE PIA-TEST METHOD-6010 - SHRINKAGE OF CORDAGE, BOILING WATER METHOD; DETERMINATION OF PIA-TEST METHOD-6016 - STRENGTH AND ELONGATION BREAKING OF COR
14、DAGE; NON-SPLICED SPECIMEN METHOD (Electronic copies may be obtained from .) Copyright Protected: Do Not Copy!PIA-C-2754D Page 3 of 13 2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a conflict between the text of this document and the references cited here
15、in, the text of this document shall take precedence. Nothing in this document, however, shall supersede applicable laws and regulations unless a specific exemption has been obtained. 3 REQUIREMENTS 3.1 First article. When specified (see 6.1), a sample shall be submitted for first article inspection
16、in accordance with 4.3. 3.2 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally preferable materials should be used to the maximum extent possible, provided that the material meets or exceeds the operational and maintenance requirements, and promotes
17、 economically advantageous life cycle costs. 3.3 Government and contractor purchases. The requirements specified in 3.13 and 3.14 apply only to cord purchased directly by the Government. All other requirements apply to cord purchased by a contractor as a component for an end item and to cord purchas
18、ed directly by the Government. 3.4 Standard. The cord shall match the standard for shade, appearance and shall be, unless otherwise indicated, equal to or better than the standard with respect to all characteristics for which the standard is referenced (see 6.2). 3.5 Material. The yarn used in the f
19、abrication of the cord shall be bright, high tenacity multifilament polyester yarn. The yarn denier shall be as specified in TABLE I. 3.6 Construction and physical requirements. The cord shall be braided without a core and conform to the requirements specified herein and in TABLE I when tested as sp
20、ecified in 4.4.5. The cord shall be braided on braiding machines having the number of carriers specified in TABLE I for the applicable Type and the machines shall be regulated to give a two over and two under conventional braid. The Types I and II cord after braiding shall be heat set in continuous
21、lengths and shall not show more than a 9 percent residual shrinkage when tested as specified in 4.4.5. TABLE I Physical requirement. Characteristic Type I Type II Type III Number of carriers 24 24 12 Ends per carrier 2 3 1 Total ends 48 72 12 Basic yarn denier 1100 1100 1000 Yarn ply single single s
22、ingle Picks per inch 15-16 10-12 14-16 Length per pound, feet (minimum) 180 120 900 Breaking strength, pounds (minimum) 600 1000 125 Elongation percent (at 75 percent of the specified breaking strength): Minimum Maximum 7 7 15 11 11 22 Copyright Protected: Do Not Copy!PIA-C-2754D Page 4 of 13 3.7 Co
23、lor. Unless otherwise specified (see 6.1), the color of the cord shall be natural. When a color is specified, other than natural, the color shall be obtained by yarn dyeing and the cord shall match an approved shade standard (see 3.4 and 6.2). 3.7.1 Visual shade matching. When evaluated in accordanc
24、e with 4.5.6, the color of the dyed cord shall match the standard with sources simulating artificial daylight and shall be a good match to the standard under incandescent lamplight. 3.7.2 Colorfastness to light. PIA has adopted AATCC 16.3 as an acceptable alternative test method to AATCC 16.2 for th
25、e testing of Narrow Fabrics using Xenon (see TABLE VI). 3.7.3 Colorfastness. When tested as specified in 4.4.5, the dyed cord shall show fastness to light and laundering as follows: Characteristic Rating, Min Light (Fade) 1/3-4 Laundering Color Change 2/3-4 Notes: 1/Rating using the AATCC Evaluation
26、 Procedure 1, Gray Scale for Color Change. 2/Rating using the AATCC Evaluation Procedure 8 and AATCC 9 Step Chromatic Transference Scale. 3.8 Finish. Types I and II cords only, shall be finished with an acrylic or polyethylene resin such as to result in an additional weight not to exceed 2 percent.
27、The process of applying finish to the cord shall cause no detrimental effect to the physical or chemical properties of the cord. Type III cord will not have any finish. The supplier shall report on the test method the type of finish used, either polyethylene or acrylic. 3.8.1 Tackiness. The cord sha
28、ll not be excessively tacky. The force required to separate the lines shall be not greater than 23 pounds when tested as specified in 4.4.5. 3.9 Date of Manufacture (see 6.1). When required by the procurement document, the textile manufacturer shall properly identify the age of the textile materials
29、 by placing a tag on the finished goods or label on the containers identifying the specification to which the material is manufactured, the lot number and the date of manufacture. The date of manufacture is defined as the date (month and year) of the last manufacturing process that affects the physi
30、cal characteristics of the material. 3.10 Resistance to heat and light. The polyester cord shall lose no more than 25 percent of its original breaking strength after exposure to heat and light when tested as specified in 4.4.5. 3.11 Extractable matter (water-soluble material). No material shall be a
31、dded for the purpose of weighing the cord. The water-soluble material of the cord shall not exceed 4.0 percent when tested as specified in 4.4.5. 3.12 pH. The pH of the water extract of the finished cord shall be no less than 5.5 nor more than 9.0 when tested as specified in TABLE VI. 3.13 Put-up an
32、d length. Unless otherwise specified (see 6.1), the cord shall be put on Copyright Protected: Do Not Copy!PIA-C-2754D Page 5 of 13 non-returnable reels/spools in lengths specified in TABLE II. If the cord is put-up other than on reel/spool then the yardage in the package shall be converted to repres
33、ent the yardage per reel/spool in order to maintain the current sampling and inspection requirements listed in this specification (see 3.13, 3.14 and 4.4.2). Each reel/spool shall not contain any knots or splices and shall be so wound that each turn and layer is free from entanglement. A plus tolera
34、nce of 10 percent shall be allowed on the total length of any reel/spool. The ends of the cord shall be heat sealed to prevent fraying. When cord is put up in 500 yard lengths, 20 percent of the total number of reels/spools in the lot shall be in one continuous length. The remaining 80 percent in th
35、e lot may contain pieced lengths (lapped on ends). These reels/spools shall contain no more than two pieces, with no piece less than 50 yards in length. When pieced lengths are contained on a reel/spool, the number and lengths of the pieces shall be marked on the identification ticket or label as sp
36、ecified in 3.14. TABLE II Length. 3.14 Identification. Each unit pack (spool/reel) of cord, interior container and exterior container shall be marked per contract requirements. An additional label as noted below shall be attached to spool if cord is more than one piece (see 3.13): - Number and lengt
37、h of pieces - Length of pieces of cord per spool. 3.15 Workmanship. The fabricated cord shall conform to the quality and grade of product established by this specification. 4. VERIFICATION 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the contractor
38、 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 speci
39、fied herein, unless disapproved by the procuring activity. The procuring activity reserves the right to perform any of the inspections set forth in this specification where such inspections are deemed necessary to ensure supplies and services conform to prescribed requirements. 4.1.1 Responsibility
40、for compliance. All items shall meet all requirements of Sections 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 contrac
41、tor of the responsibility of ensuring that all products or supplies submitted to the procuring activity 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,
42、this does not authorize submission of known defective material, either indicated or actual, nor does it commit the procuring activity to accept Type Length on reel/spool (yards) minimum I 500 yards II 500 yards III 500 yards Copyright Protected: Do Not Copy!PIA-C-2754D Page 6 of 13 defective materia
43、l. 4.1.2 Certificates of Compliance. When Certificates of Compliance are submitted, the procuring activity reserves the right to inspect such items to determine the validity of the certification. 4.2 Classification of inspections. The inspection requirements specified herein are classified as follow
44、s: a. First article inspection (see 4.3) b. Quality conformance inspection (see 4.4). 4.3 First article inspection. When a first article is required (see 3.1), it shall be examined for the defects specified in 4.4.2 through 4.4.4.2 and shall be tested as specified in 4.4.5. 4.4 Conformance inspectio
45、n. Conformance inspection shall include the examination and tests of 4.4.1 through 4.5.5 as applicable. Sampling for inspection shall be performed as specified in this document, unless otherwise specified in the contract or order (see 6.1). 4.4.1 Component and material inspection. In accordance with
46、 4.1, components and materials shall be inspected in accordance with all the requirements of referenced documents unless otherwise excluded, amended, modified, or qualified in this specification or applicable purchase document. 4.4.1.1 Component and material certification. A Certificate of Complianc
47、e may be acceptable as evidence that the characteristics listed in TABLE III conform to the specified requirements. TABLE III Component and material certification. Characteristic Requirement paragraph Material 3.5 Denier 3.5 Tenacity 3.5 4.4.2 End item critical defect examination. Every end item, pr
48、ior to the visual examination in 4.4.3, shall be examined for the critical defects listed in TABLE IV. Any end item found to contain one or more critical defects shall be rejected. 4.4.3 End item visual examination. The cord shall be examined for the defects listed in TABLE IV. All defects shall be
49、counted regardless of their proximity to each other. The lot size shall be expressed in units of spools or reels. The sample unit shall be one spool or reel. Ten percent of the total footage, but not less than 100 feet, shall be examined on each spool or reel in the sample. Acceptance sampling plan shall be determined by using Inspection Level II with an Acceptance Quality Limit (AQL) of 1.5 for major defects and 4.0 for
