1、 The following commercial specification is originally adopted from the military document. Revision A includes all known accepted revisions, amendments, notices, and Department of Defense (DoD) engineering changes previously developed for this item. Revision B and forward include changes adopted to r
2、eflect technology and design evolution. CLOTH, PARACHUTE, NYLON-RIP STOP AND TWILL WEAVE 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 c
3、overs rip stop and twill weave nylon parachute cloth. 1.2 Type designation. There shall be three types of nylon cloth of the following types and weaves, as specified (see 6.1). Type I - 1.1 oz/sq. yd., Rip Stop Weave Type II - 1.6 oz/sq. yd., Twill Weave Type III - 1.6 oz/sq. yd., Rip Stop Weave 2.
4、APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in Sections 3 and 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 ha
5、s been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements of the documents cited in Sections 3 and 4 of this specification, whether or not they are listed. 2.2 Government publications. 2.2.1 Government publications. The following
6、 Government publications form a part of this document. STANDARDS FEDERAL FED-STD-595 - Colors Used in Government Procurements PIA-C-7020E 19 June 2013 Superseding PIA-C-7020C 03 May 2007 DISTRIBUTION STATEMENT: All Rights Reserved. No Part of this publication may be reproduced without prior written
7、permission from Parachute Industry Association. Additional copies may be purchased online from PIA Specifications and Products at: . Copyright Protected: Do Not Copy!PIA-C-7020E MILITARY MIL-DTL-6645 Parachutes, Personnel, General Specifications for (Unless otherwise indicated, copies of the above s
8、pecifications and standards are available from the DLA Document Services, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094. Electronic copies of Military and Federal standards and specifications may be obtained from https:/assist.daps.dla.mil/quicksearch/.) FEDERAL TRADE COMMISSION (FTC)
9、 16 CFR 303 - Rules and 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 http:/www.access.gpo.gov/.)
10、 2.3 Non-government publications. The following documents form a part of this document. AMERICAN ASSOCIATION OF TEXTILE CHEMISTS AND COLORISTS (AATCC) AATCC 8 - Colorfastness to Crocking; Crockmeter Method AATCC 16 - Colorfastness to Light AATCC 61 - Colorfastness to Laundering: Accelerated AATCC 81
11、 - pH of the Water-Extract from Wet Processed Textiles AATCC 192 - Weather Resistance of Textiles: Sunshine-Arc Lamp Exposure with and without Wetting AATCC Evaluation Procedures: - 1 Gray Scale for Color Change - 2 Gray Scale for Staining - 8 AATCC 9 - Step Chromatic Transference Scale - 9 Visual A
12、ssessment of Color Difference Textiles. (Applications for copies should be addressed to the AATCC National Headquarters, P.O. Box 12215, Research Triangle Park, NC 27709-2215. Electronic copies may be obtained from www.aatcc.org.) AMERICAN SOCIETY FOR QUALITY (ASQ) ANSI/ASQ Z1.4 - Sampling Procedure
13、s and Tables for Inspection by Attributes (Copies are available online at: www.asq.org or American Society for Quality, 600 North Plankinton Avenue, Milwaukee, WI 53203.) Page 2 of 25 Copyright Protected: Do Not Copy!PIA-C-7020E ASTM INTERNATIONAL (ASTM) ASTM D 276 - Standard Test Methods for Identi
14、fication of Fibers in Textiles ASTM D 629 - Standard Test Methods for Quantitative Analysis of Textiles ASTM D 737 - Standard Test Method for Air Permeability and Testing Textiles ASTM D 1776 - Standard Test Method for Conditioning Textiles for Testing ASTM D 1777 - Standard Test Method for Thicknes
15、s of Textile Materials ASTM D 2261 - Standard Test Method for Tearing Strength of Fabrics by the Tongue (Single Rip) Procedure (Constant-Rate-of-Extension Tensile Testing Machine) ASTM D 3774 - Standard Test Method for Width of Textile Fabric ASTM D 3775 - Standard Test Method for Warp (End) and Fil
16、ling (Pick) Count of Woven Fabrics ASTM D 3776 - Standard Test Method for Mass per Unit Area (Weight) of Fabric ASTM D 3882 - Standard Test Method for Bow and Skew in Woven and Knitted Fabrics ASTM D 5035 - Standard Test Method for Breaking Force and Elongation of Textile Fabrics (Strip Method) ASTM
17、 G 151 - Standard Practice for Exposing NonMetallic Materials in Accelerated Test Devices That Use Laboratory Light Sources ASTM G 155 - Standard Practice for Operating Xenon Arc Light Apparatus for Exposure of Non-Metallic Materials (Application for copies should be addressed to the ASTM Internatio
18、nal, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959. Electronic copies may be obtained from www.astm.org/.) PARACHUTE INDUSTRY ASSOCIATION (PIA) PIA-STD-851 - CODING, MANUFACTURERS IDENTIFICATION, NYLON PARACHUTE CLOTH PIA-TEST METHOD-503 - PERMANENCE OF SET AND SHRINKAGE IN PARACHUTE FABRI
19、CS (BOILED WATER TEST METHOD) (Electronic copies may be obtained from .) 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 herein, the text of this document takes precedence. Nothing in thi
20、s document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 Yarn. The nylon yarn used in the manufacture of all types of parachute fabric shall be continuous multifilament, bright, high tenacity, light and heat resistant polyamid
21、e prepared Page 3 of 25 Copyright Protected: Do Not Copy!PIA-C-7020E from hexamethylene diamine and adipic acid, or its derivatives. The yarn shall have a minimum melting point of 471F (244C) when tested in accordance with 4.5. The yarn shall not be bleached in any manner or process. The use of any
22、recycled material is prohibited, unless otherwise specified (see TABLE II). 3.1.1 Yarn twist. Any yarn twist (warp and/or filling) is acceptable, provided all requirements of this specification are met. 3.2 Fiber identification. Each roll of the finished cloth shall be labeled or ticketed and invoic
23、ed for fiber content in accordance with the Rules and Regulations Under the Textile Fiber Products Identification Act. 3.3 Weave. 3.3.1 Type I weave. The weave pattern for Type I cloth shall be as specified in FIGURE 1 or FIGURE 1 Alternate. 3.3.2 Type II weave. The weave pattern for Type II cloth s
24、hall be a two-up and one-down twill as specified in FIGURE 2. 3.3.3 Type III weave. The weave pattern for Type III cloth shall be as specified in FIGURE 3 or FIGURE 3 Alternate. TABLE I Physical properties. Characteristic Type I Type II Type III Yarns per inch (minimum 1/): Warp Filling 120 120 120
25、120 76 76 Weight, ounces/square yard (maximum) 1.10 1.60 1.60 Thickness, inches (maximum) 0.003 0.004 0.004 Breaking strength, pounds per inch (minimum 1/): Warp and filling 42 50 50 Elongation, percent (minimum 1/): Warp and filling 20 20 20 Tear strength, pounds (minimum 1/): Warp and filling 5 5
26、5 Air permeability, cubic feet per minute per square feet 100 20 13030 130 30 Note: 1/All individual readings shall meet or exceed the minimum requirement. 3.4 Physical and chemical properties. The physical and chemical properties shall conform to TABLE I and the following subparagraphs thereto. The
27、 frequency of testing shall be five tests across the width of the delivered fabric. For 72 inch wide fabric delivered without splitting, the number of tests shall be doubled; if the fabric is split by the finisher, the fabric is considered as 36 inches wide and will be tested at the frequency specif
28、ied herein. Page 4 of 25 Copyright Protected: Do Not Copy!PIA-C-7020E 3.4.1 Finish. The cloth shall be scoured to remove sizing and other contaminants at a temperature which will not cause fixation of same into cloth, or result in permanent setting of the cloth. The cloth covered by this specificati
29、on shall not be bleached, resinated or treated with oxalic or phosphoric acid in any manner or process (see 6.4). 3.4.2 Permanence of set. When the cloth is subjected to the test specified in 4.6.2, the permanence of the cloth set shall be as follows: a. The average of the air permeability readings
30、taken after testing shall be within 15 percent of the average of the readings taken before testing. b. The cloth shrinkage measured after testing shall not exceed 3.0 percent in either the warp or filling direction. c. The thickness of Type I shall not exceed 0.003 inch after testing as specified in
31、 TABLE IV. The thickness of Types II and III shall not exceed 0.004 inch after testing as specified in TABLE IV. 3.4.3 Water soluble material. The water soluble material of the finished cloth shall not exceed 2.0 percent when tested as specified in 4.6. 3.4.3.1 Silicone emulsion finish. The finished
32、 cloth shall contain a silicone emulsion finish so applied that it is evenly distributed throughout the cloth. The amount of finish added shall be a minimum of 0.3 percent based on the weight of the dry cloth. The finisher shall submit a certification for each finishers roll (see 4.5.3.3) indicating
33、 that the silicone emulsion finish was used. 3.4.4 pH. The pH value of the finished cloth shall not be less than 5.5 nor more than 9.0 when tested as specified in 4.6. 3.4.5 Color. The color of the finished cloth and its referenced standard shall be as specified by the procuring activity (see 6.2).
34、3.4.5.1 Dyeing. When dyed fabric is required, the fabric shall be yarn or piece dyed. 3.4.5.2 Visual shade matching. When evaluated in accordance with 4.6.5, the color of the dyed fabric shall match the standard when viewed with sources simulating artificial daylight D75 illuminant, and shall be a g
35、ood match to the standard under incandescent lamplight. 3.4.5.3 Colorfastness. When tested as specified in 4.7, the finished fabric shall show fastness to light, laundering, crocking and bleeding in damp air as follows: (THIS SPACE LEFT INTENTIONALLY BLANK) Page 5 of 25 Copyright Protected: Do Not C
36、opy!PIA-C-7020E Notes: 1/Rating using the AATCC Evaluation Procedure 1, Gray Scale for Color Change. 2/Rating using the AATCC Evaluation Procedure 1, Gray Scale for Color Change and AATCC Evaluation Procedure 2, Gray Scale for Staining.3/Rating using the AATCC Evaluation Procedure 8 and AATCC 9 Step
37、 Chromatic Transference Scale. 3.4.6 Light and heat resistance. The finished cloth shall not lose more than 25 percent of its original strength when tested in accordance with 4.6. 3.4.7 Dimensions. 3.4.7.1 Width. Unless otherwise specified, the overall width of the finished fabric shall be 36 inches
38、 inch, 48 inches inch, 60 inches inch, or 72 inches inch. The acceptable width shall be inclusive of the selvages (see 6.2). Unless otherwise specified, fringed selvages will not be allowed. The selvage shall be hot slit and sealed against raveling if woven on shuttleless looms. 3.4.7.2 Length and p
39、ut up. Unless otherwise specified (see 6.2), a shippers roll shall be a minimum of 100 yards with a minimum piece size of 50 yards. A shippers roll shall have a maximum of two splices with no more than 10 percent of the yards ordered containing splices. 3.4.7.3 Bias (skew) and bow in fabric. Bias an
40、d bow shall be measured according to ASTM D 3882. Requirements shall be as listed in TABLE VI. 3.5 Identification yarns. Unless otherwise specified, each roll of cloth shall have identification warp yarns as assigned per PIA-STD-851, a maximum of 2 inches from at least one selvedge edge of the finis
41、hed cloth. The dye used in the identification yarns shall have no adverse effect on the physical properties of the fabric and the dyed yarns shall show no bleeding or color transfer when subjected to the tests as specified in TABLE II. 3.6 Identification of product. Each roll of finished cloth shall
42、 be marked for identification in accordance with good commercial practice. In addition, each piece of cloth in each finishers roll shall be clearly and legibly marked with the finishers roll number or code, as specified in 4.4, and each roll shall have attached a durable tag on which the finishers r
43、oll number or code is listed. The date of manufacture (see 3.7) shall be included on the tag attached to each roll. 3.7 Date of manufacture. The date of manufacture is defined as the date (month and year) of the last manufacturing process that affects the physical characteristics of the cloth. This
44、Characteristic Rating (minimum) Light (fade) 1/3-4 Laundering 2/: Color change Staining 3-4 3-4 Crocking 3/: Dry Wet 3.5 3.5 Bleeding in damp air 2/3-4 Page 6 of 25 Copyright Protected: Do Not Copy!PIA-C-7020E would not include slitting, inspection or rewinding. 3.8 Workmanship. The finished cloth s
45、hall be clean and evenly woven and shall conform to the quality and grade of product established by this specification and the occurrence of defects shall not exceed the applicable Acceptance Quality Limit. The finished cloth shall not show spottiness or be off shade of the standard range. The finis
46、hed cloth shall not have an objectionable odor (Normal residual odor of chemicals commonly used shall not be regarded as objectionable.). 3.9 First article. When specified (see 6.2), a sample representative of the production quality shall be subjected to the first article inspection in accordance wi
47、th 4.3. 4. VERIFICATION 4.1 Classification 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 pur
48、chase 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 procuring activity. The procuring activity reserves the right to perform any of the inspections set forth in this specification
49、where such inspections are deemed necessary to ensure supplies and services conform to prescribed requirements. 4.1.1 Responsibility for compliance. All items must meet all requirements of Sections 3, 4 and 5. The inspection set forth in this specification shall become 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
