1、 The following commercial specification is adopted from the military document. Initial and 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
2、 reflect technology and design evolution. WEBBING AND TAPE, TEXTILE, ARAMID FIBER 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 w
3、ebbing and tape made from aramid fiber. 1.2 Classification. The webbing and tape shall be of the following types as specified (see 6.2). Type I - Double woven webbing Type II - Single woven webbing 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in Sections 3
4、and 4 of this specification. This section does not include documents cited in other sections of this specification or 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 or not they are listed. 2.2 Government publications. 2.2.1 Government publications. The following Government publications form a part of this document. FEDERAL TRADE COMMISSION (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-W-43685C 04 June 2014 S
7、uperseding PIA-W-43685B 08 November 2010 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: . PIA-W-43685C 2.
8、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: AATCC Crockmeter Method AATCC 16 - Colorfastness to Light AATCC 61 - Colorfastness to Laundering: Accelerated AATCC
9、 81 - pH of Water-Extract from Wet Processed Textiles AATCC 96 - Dimensional Changes in Commercial Laundering of Woven and Knitted Fabrics Except Wool AATCC 173 - CMC: Calculation of Small Color Differences for Acceptability AATCC Evaluation Procedures: - 1 Gray Scale for Color Change - 2 Gray Scale
10、 for Staining - 8 AATCC 9 - Step Chromatic Transference Scale - 9 Visual Assessment for Color Differences of Textiles (Applications for copies should be addressed to AATCC National Headquarters, P.O. Box 12215, Research Triangle Park, NC 27709-2215. Electronic copies may be obtained from www.aatcc.o
11、rg.) 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.) ASTM INTERNATIONAL (ASTM) ASTM D 1423 - Standa
12、rd Test Method for Twist in Yarns by Direct- Counting ASTM D 1776 - Standard Practice for Conditioning and Testing Textiles ASTM D 1777 - Standard Test Method for Thickness of Textile Materials ASTM D 1907 - Standard Test Method for Linear Density of Yarn (Yarn Number) by the Skein Method ASTM D 377
13、4 - Standard Test Method for Width of Textile Fabric ASTM D 3775 - Standard Test Method for Warp (End) and Filling (Pick) Count of Woven Fabrics ASTM D 3776 - Standard Test Methods for Mass Per Unit Area (Weight) of Fabric (Application for copies should be obtained from ASTM International, 100 Barr
14、Harbor Drive, West Conshohocken, PA 19428-2959. Electronic copies may be obtained from www.astm.org.) Page 2 of 13 PIA-W-43685C PARACHUTE INDUSTRY ASSOCIATION (PIA) PIA-TEST METHOD-4108 - STRENGTH AND ELONGATION, BREAKING; TEXTILE WEBBING, TAPE AND BRAIDED ITEMS (Electronic copies may be obtained fr
15、om .) 2.4 Order of precedence. Unless otherwise stated 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 this document, however, supersedes applicable laws and regulations un
16、less a specific exemption has been obtained. 3. REQUIREMENTS 3.1 First article. When specified (see 6.2) a sample shall be subjected to first article inspection in accordance with 4.3. 3.2 Recycled, recovered or environmentally preferable materials. Recycled, recovered or environmentally preferable
17、materials should be used to the maximum extent possible, provided that the material meets or exceeds the operational and maintenance requirements and promotes economically advantageous life cycle costs. 3.3 Standard. The solution-dyed webbing and tape shall match the standard for shade and shall be
18、equal to or better than the standard with respect to all characteristics for which the standard is referenced (see 6.1). 3.4 Materials. 3.4.1 Yarn. The yarn for the warp and the filling shall be made from a bright continuous filament aramid fiber (see 6.4). The yarn may be heat set (see 6.3) to meet
19、 the shrinkage requirement specified in 3.8. The yarn denier and yarn ply shall be as specified in TABLE I. When ply yarns are specified, the final ply of the yarn shall have a minimum of 2.5 tpi. The number of single yarns specified in TABLE I shall be twisted together (plied) in one operation. Tes
20、ting shall be as specified in 4.4.1.2. 3.4.2 Color. The color of the webbing and tape shall be Olive Green 106 to match the standard sample when tested as specified in 4.4.3. The color shall be obtained by the use of melt spun solution-dyed fibers. 3.4.3 Visual shade matching. When evaluated in acco
21、rdance with 4.5, the color of the dyed fabric shall match the standard when viewed with sources simulating artificial daylight, and shall be a good match to the standard under incandescent lamplight. 3.4.4 Colorfastness. When tested as specified in 4.5, the webbing and tape shall show fastness to li
22、ght, laundering and crocking as follows: Page 3 of 13 PIA-W-43685C Notes: 1/Rated using the AATCC Evaluation Procedure 1, Gray Scale for Color Change. 2/Rated using the AATCC Evaluation Procedure 1, Gray Scale for Color Change and AATCC Evaluation Procedure 2, Gray Scale for Staining. 3/Rated using
23、the AATCC Evaluation Procedure 8, AATCC9-Step Chromatic Transference Scale. 3.5 Physical requirements. The construction and physical requirements of the finished webbing and tape shall be as specified in TABLE I. TABLE I Construction and physical requirements. Characteristic Type I Type II Width (in
24、ch) 5/8 -1/32 +1/16 1 1/32 Thickness (inch) 0.040 min. - 0.055 max. 0.015 min. - 0.025 max. Weight oz./linear yd. (max.) 0.45 0.30 Breaking strength, pound (min.) 650 525 Ends in warp (min.): Face and back Binder Stuffer 158 9 40 276 - - Filling yarns per inch (min.) 48 30 Yarn denier (nominal): Fac
25、e and back Binder Stuffer Filling 2 ply 200 denier 2 ply 200 denier 2 ply 200 denier 4 ply 200 denier 200 denier - - 2 ply 200 denier 3.6 Weave. The weave for the webbing and tape shall be as specified in 3.6.1 and 3.6.2. The filling for both types shall traverse the full width of the webbing or tap
26、e with one filling yarn per shed. 3.6.1 Type I. The Type I webbing shall be a double fabric consisting of face and back warps with two ends weaving as one and a stuffer warp, all bound together by a binder warp with the ends weaving singly. The stuffer ends shall weave between the face and the back
27、warps and shall not show on either the face or the back. The face warp shall weave plain weave with picks that show on the face. The back warp shall weave plain weave with picks that show on the back. The binder warp shall weave plain weave throughout. 3.6.2 Type II. The Type II tape shall be plain
28、weave, except that the warp ends shall weave two ends as one. Characteristic Rating, minimum Light (fade) 1/3-4 Laundering: 2/Color change Staining 2-3 2-3 Crocking 3/ : Dry Wet 3.5 3.5 Testing shall be as specified in 4.4.3 Page 4 of 13 PIA-W-43685C 3.7 Finish. The webbing and tape shall be scoured
29、. Heat setting (see 6.3) is required in either the yarn or in the webbing and tape in order to meet the shrinkage requirement specified in 3.8. 3.8 Shrinkage. The shrinkage of the finished webbing and tape shall be no more than 50 percent when tested as specified in 4.4.3. 3.9 Curvature. The webbing
30、 shall show no more lateral curvature than 1/4 inch within a yard when tested as specified in 4.6.1. 3.10 pH. The pH value of the water extract of the finished webbing shall not be less than 5.5 nor more than 9.0 when tested as specified in 4.4.3. 3.11 Length and put-up. For Government procurement o
31、nly, unless otherwise specified (see 6.2), the webbing and tape shall be furnished in lengths of 90 to 110 yards. No roll shall contain more than three pieces and no piece shall be less than 3 yards in length. 3.12 Identification of product. Each roll shall have a label or tag marked with the follow
32、ing information: and attached in such a manner as to remain in place until all webbing has been removed from the roll. a. Webbing, Textile, Para-aramid, Intermediate Modulus b. Type, Class and specification number c. Width d. Gross yardage e. Number of pieces in roll f. Producers name g. Date of man
33、ufacture (month and year) 3.13 Fiber identification. Each roll of webbing and tape shall be labeled, ticketed or invoiced for fiber content in accordance with the Rules and Regulations Under the Textile Fiber Products Identification Act. 3.14 Workmanship. The finished webbing and tape shall conform
34、to the quality of product established by this specification. 3.15 Date of Manufacture (see 6.2). When required by the procurement document, the textile manufacturer shall properly identify the age of the textile materials by placing a tag on the finished goods, or label on the containers; identifyin
35、g 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 physical characteristics of the material. 4. VERIFICATION 4.1 Responsibility for
36、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 Page 5 of 13 PIA-W-43685C purchase order, the cont
37、ractor may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set forth in this specification where such inspections are deemed nec
38、essary to ensure supplies and services conform to prescribed requirements. 4.1.1 Responsibility 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 progra
39、m. 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, comply with all requirements of the contract. Sampling inspection, as part of manufacturing
40、 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 Government to accept defective material. 4.1.2 Certificate of Compliance. When Certificates of
41、Compliance are submitted, the Government 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 follows: a. First article inspection (see 4.3) b. Quality conformance in
42、spection (see 4.4). 4.3 First article inspection. When a first article is required (see 3.1 and 6.2), it shall be examined for the defects specified in 4.4.2.1 through 4.4.2.3 and tested as specified in 4.4.3. 4.4 Conformance inspection. Conformance inspection shall include examination of 4.4.2.1 an
43、d tests of 4.4.3. Sampling for inspection shall be performed in accordance with ANSI/ASQ Z1.4, and with the quality acceptance limits as specified in this document, unless otherwise specified in the procurement documents. 4.4.1 Component and material inspection. In accordance with 4.1, components an
44、d 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 Compliance may be acceptable
45、as evidence that the webbing and tape conforms to the requirements specified in 3.4.4 and TABLE I. 4.4.1.2 Component testing. In addition to the quality assurance provisions of the subsidiary specifications, component materials listed in TABLE II shall be tested for the specified characteristics in
46、accordance with the referenced test methods of ASTM D 1776. The lot size shall be expressed in pounds, and the sample unit shall be 500 yards of the Nomex yarn. The lot shall be unacceptable if one or more units fail to meet any requirement specified. All test Page 6 of 13 PIA-W-43685C reports shall
47、 contain the individual values in expressing the final results. The sample size shall be as per TABLE IV. TABLE II Component tests. Characteristic Requirement paragraph Test method Material: Nomex identification 3.4.1 1/ Yarn: Twist Denier Ply 3.4.1 3.5 3.5 ASTM D 1423 ASTM D 1907 1/ Visual Note: 1/
48、A Certificate of Compliance shall be submitted and will be acceptable for the stated requirement. 4.4.2 End item examination. 4.4.2.1 Yard-by-yard examination. The webbing and tape shall be examined on both sides for the defects listed in TABLE III. All defects found shall be counted regardless of t
49、heir proximity to each other, except where two or more defects represent a single local condition, in which case only the more serious defect shall be counted. A continuous defect shall be counted as one defect for each warpwise yard or fraction thereof in which it occurs. The lot size shall be expressed in linear yards. The sample unit shall be 1 yard of webbing or tape. The sample yardage shall be apportioned equally among the selected rolls. The inspection level shall be I and the Acceptance Quality Limit (AQL
