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. Revisions B and forward include changes adopted to
2、reflect technology and design evolution. TAPE, PRESSURE SENSITIVE, FOR MENDING NYLON PARACHUTE CANOPIES 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
3、document covers one type of mending tape for repairing small tears in nylon cargo parachute canopies. The tape is rip-stop nylon cloth, coated on one side with pressure sensitive adhesive which is protected with a removable liner. 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this sec
4、tion are specified in Sections 3 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 c
5、autioned 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 Non-government publications. The following documents form a part of this document. AMERICAN ASSOCIATION OF TEXTILE CHEMISTS AND COLORISTS (AAT
6、CC) AATCC 16, Option A - Colorfastness to Lightfastness AATCC 107 - Colorfastness to Water AATCC Evaluation Procedures: - 1 Gray Scale for Color Change - 2 Gray Scale for Staining - 9 Visual Assessment of Color Difference of Textiles. (Application for copies should be addressed to the AATCC National
7、 Headquarters, P.O. Box 12215, Research Triangle Park, NC 27719-2215. Electronic copies may be obtained from www.aatcc.org.) PIA-T-43618C 14 November 2012 Superseding PIA-T-43618B 24 November 2008 DISTRIBUTION STATEMENT: All Rights Reserved. No Part of this publication may be reproduced without prio
8、r written permission from Parachute Industry Association. Additional copies may be purchased on-line from PIA Specifications and Products at: . PIA-T-43618C Page 2 of 13 ASTM INTERNATIONAL (ASTM) ASTM D 276 - Standard Test Methods for Identification of Fibers in Textiles ASTM D 1776 - Standard Pract
9、ice for Conditioning and Testing Textiles ASTM D 1974 - Standard Practice for Methods of Closing, Sealing and Reinforcing Fiberboard Boxes ASTM D 3611 - Standard Practice for Accelerated Aging of Pressure Sensitive Tapes ASTM D 3775 - Standard Test Method for Warp (End) and Filling (Pick) Count of W
10、oven Fabrics ASTM D 3776 - Standard Test Methods for Mass Per Unit Area (Weight) of Fabric ASTM D 3951 - Standard Practice for Commercial Packaging ASTM D 5035 - Standard Test Methods for Breaking Force and Elongation of Textile Fabrics (Strip Method) ASTM D 5118 - Standard Practice for Fabrication
11、of Fiberboard Shipping Boxes ASTM D 6251 - Standard Specification for Wood Cleated Panelboard Shipping Boxes (Application for copies should be addressed to the ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959. Electronic copies may be obtained from www.astm.org.) AMERICAN
12、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, Milwaukee, WI 53203.) PARACHUTE INDUSTRY ASSOCIATION (PIA) PIA-C-7020 - CLOTH, PARACHUTE,
13、 NYLON-RIP STOP AND TWILL WEAVE (Electronic copies may be obtained from .) 2.3 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 shall take precedence. Nothing
14、in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 First article. When specified, in the contract or purchase order, a sample shall be subjected to first article inspection (see 4.2, and 6.1). PIA-T-43618C Page 3 o
15、f 13 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 economically advan
16、tageous life cycle costs. 3.3 Material. 3.3.1 Cloth. The base cloth for the tape backing shall be made of polyamide multi-filament yarns prepared from hexamethylene diamine and adipic acid or its derivatives. The yarns shall have a melting point of not less than 472F and shall not be bleached in any
17、 manner or process. The cloth shall be of a color suitable for assuring conformance to the color requirement for the tape (see 3.4.1). The cloth shall show good fastness as follows: Notes:1/Rated using the AATCC Evaluation Procedure 1, Gray Scale for Color Change and AATCC Evaluation Procedure 2, Gr
18、ay Scale for Staining. 2/Rated using the AATCC Evaluation Procedure 1, Gray Scale for Color Change. 3.3.1.1 Weave. The rip-stop cloth shall be plain weave, except that it shall have reinforcing ribs in both directions, made by pairing two warp yarns and two filling yarns to weave as one at uniform i
19、ntervals. There shall be not less than 4.5 repeats of the pattern per inch in both directions. 3.3.2 Adhesive. The adhesive for the tape shall be a water insoluble, pressure sensitive adhesive which requires no heat, solvent, or other preparation, prior to, or after application of the tape to clean,
20、 dry nylon cloth. 3.3.3 Liner. The liner for protecting the adhesive shall be of such material as to permit easy removal for fast, distortion free application of the tape. During removal, the liner shall not break and shall not remove the adhesive from the cloth backing when tested as specified in 4
21、.4.4. 3.4 Tape construction. The finished tape shall consist of the nylon rip-stop cloth backing specified in 3.3.1, completely and evenly coated on one side with the adhesive specified in 3.3.2. There shall be no adhesive strike-through to the face of the tape as evidenced by stickiness of the surf
22、ace, discoloration or boardiness. The adhesive shall be protected with the liner specified in 3.3.3. The tape shall conform to the requirements specified in TABLE I when tested as specified in 4.4.4. (THIS SPACE LEFT INTENTIONALLY BLANK) Characteristic Rating, minimum Cold Water 1/: Color Change Sta
23、ining 3-4 3-4 Light (Fade) 2/3-4 Testing shall be specified in 4.3.1 PIA-T-43618C Page 4 of 13 TABLE I Physical requirements. Characteristic Requirement Minimum Maximum Weight (exclusive of liner), ounces per square yard 2.7 3.5 Yarns per inch: - Warp - Filling 100 - 95 - Breaking strength, pounds:
24、- Warp - Filling 75 - 60 - Elongation, percent: - Warp - Filling 18 - 20 - Holding power, inches of slippage: - Initial - After water immersion - After accelerated aging - At 150F - 1/8 - 1/8 - 1/8 - 1/8 Impact resistance, at 24 inch- pounds: - At standard conditions - At minus 40 F Pass or fail Pas
25、s or fail Blocking, scale rating - No. 1 3.4.1 Color. Unless otherwise specified, the color of the tape shall be foliage green 504 (see 6.1). 3.4.1.1 Visual shade matching. When evaluated in accordance with 4.5.11, the color of the dyed tape shall match the standard with sources simulating artificia
26、l daylight and shall be a good match to the standard under incandescent lamplight 3.5 Base cloth age. The date of delivery of the tape shall be not more than 3 years from the date of manufacture of the base cloth (see 4.3.1). 3.6 Marking. Each roll shall have a tag attached to the inner end of the c
27、loth, with the date of coating (month and year) clearly marked. Each outer wrapper or tag and shipping container shall also be marked with the date of coating (see 5.1). In addition the date of coating (month and year) shall be legibly printed on the liner throughout its full length, at least once i
28、n every 12 inches, using a suitable ink which will not rub off, degrade, or affect cloth tape in any manner. 3.7 Put-up. The tape shall be furnished in rolls and shall be wound with the liner side in, on a core of sufficient rigidity to prevent distortion of the roll. The inside diameter of the core
29、 shall be 3 inches -0 +1/16 inch. The roll of tape shall be restrained from unwinding by a piece of pressure sensitive adhesive tape. 3.8 Width. Unless otherwise specified (see 6.1), the width of the tape shall be 42 PIA-T-43618C Page 5 of 13 inches 1/2 inch. 3.9 Length. Unless otherwise specified (
30、see 6.1), the length of the tape in the roll shall be 60 2 yards. The roll may contain not more than three splices. The splices shall be made so that the pieces will not separate when unwinding the tape. No piece in the roll shall be less than 5 yards in length. 3.10 Workmanship. The tape shall conf
31、orm to the quality of product established by this document. 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 as specified herein. Except as otherwise speci
32、fied 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 procuring activity. The procuring activity reserves the right to perform any of the inspections set f
33、orth in the document where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. The inspection requirements specified herein are classified as follows: 1. First Article inspection (see 4.2) 2. Quality Conformance inspection (see 4.3). 4.1.1 Certif
34、icate of Compliance. Where Certificates of Compliance are submitted, the procuring activity reserves the right to check/test such items to determine the validity of the certification. 4.2 First article inspection. The first article submitted in accordance with 3.1 shall be inspected as specified in
35、4.3 through 4.3.1.1 for compliance with design, construction, workmanship and dimensional requirements. 4.3 Quality conformance inspection. Unless otherwise specified, sampling for inspection shall be in accordance with ANSI/ASQ Z11.4 - Sampling Procedures and Tables for Inspection by Attributes. 4.
36、3.1 Component and material inspection. In accordance with 4.1 components and materials shall be inspected and tested in accordance with all the requirements of referenced specifications, drawings, and standards unless otherwise excluded, amended, modified, or qualified in this specification or appli
37、cable procurement document. 4.3.1.1 Certification. The contractor shall furnish a Certificate of Compliance with each shipment or lot, certifying that the materials and components conform to the applicable requirements listed below: (THIS SPACE LEFT INTENTIONALLY BLANK) PIA-T-43618C Page 6 of 13 Com
38、ponent Characteristic Requirement Test Method Cloth Backing Filament 3.3.1 Visual Melting point 3.3.1 ASTM D 276 Bleaching 3.3.1 Visual Colorfastness to: Cold Water Light 3.3.1 3.3.1 AATCC 107-Time shall be 1 hr. AATCC 16 Option A Age 3.5 - Note: 1/The certificate shall be accompanied by actual test
39、, inspection, or other verifiable data. 4.4 End item inspection. 4.4.1 Yard by yard examinations. The tape shall be examined for the defects listed below. The sample unit shall be 1 yard. The number of rolls from which the sample is to be selected shall be as specified in TABLE II. An approximately
40、equal number of yards shall be examined in each roll sampled. Acceptance sampling shall be determined by using ANSI/ASQ Z1.4, Inspection Level S-1 with an Acceptance Quality Limit (AQL) of 4.0. Visual Defects Note: 1/Clearly visible at normal inspection distance (approximately 3 feet). Examine Defec
41、t Cloth backing Incorrect weave (see 3.3.1.1) Any hole, cut, or tear Texture definitely ruptured Open place, crack, or hitch-back Floats or skips Multiple inch or more in either warp and filling direction or harness skips Not coated on one side only with adhesive Adhesive side of cloth backing not c
42、ompletely and evenly covered with adhesive Any edge ragged, nicked, crushed, or uneven Sticky edges Any solid lump 1/Spot, stain, or streak - more than 1 inch in its longest dimension 1/Any adhesive strike-throughs evidenced by stickiness of the surface, discoloration or boardiness Liner Missing Not
43、 dated as specified Does not completely cover adhesive Color Not color specified PIA-T-43618C Page 7 of 13 TABLE II Sample size. Lot size (yards) Sample size (rolls) Maximum number of defects acceptable in sample 2/Up to 1,300 1/3 0 1,301 up to and including 3,200 5 0 3,201 up to and including 8,000
44、 7 0 8,001up to and including 22,000 10 0 22,001 and more 15 1 Notes: 1/If lot contains fewer than three rolls, each roll in the lot shall be examined 2/Applicable to length examination only (see 4.4.3.2). 4.4.2 Roll examination. The tape rolls shall be examined for the defects listed below. The lot
45、 size shall be expressed in rolls. The sample unit shall be one (1) roll. The inspection level shall be I and the AQL, expressed in terms of defects per hundred units, shall be 4.0. 4.4.3 Dimensional examination. 4.4.3.1 Width. The tape rolls shall be examined for width. Any width not within the tol
46、erance specified in 3.6 shall be classified as a defect. The lot size shall be expressed in rolls. The sample unit shall be one roll. Acceptance sampling plan shall be determined by using ANSI/ASQ Z1.4, Inspection Level S-2 with an Acceptance Quality Limit (AQL) of 4.0. 4.4.3.2 Length in individual
47、roll. Each individual roll in the sample shall be examined for the defects listed below. The sample unit for this examination shall be one roll. The sample size (number of rolls selected as sample) and the maximum acceptable number of defects shall be as shown in TABLE II. Any roll containing more t
48、han three pieces Any piece in roll less than 5 yards Any roll with a gross length of less than 58 yards Any roll with a gross length of more than 62 yards Examine Defect Assembly of roll End of roll not secured Not wound evenly and tightly Core missing, loose, distorted, or broken Core not within sp
49、ecified tolerances Not wound with liner side in Marking Liner marking missing, not legible, incorrectly spaced, incorrectly dated Transferred to cloth, affects or degrades cloth tape Unwinding of roll (examine both sides) When unwinding, material sticks together, causing tearing or injury to any surface Pieces separate when unwinding PIA-T-43618C Page 8 of 13 4.4.3.3 Total yardage in sample. The rolls examined shall be those selected for examination of individual rolls as specified in 4.4.3.2. The lot shall be unacceptable if the average of the
