1、_ SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising there
2、from, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. Copyright 2011 SAE International All rights reserved. No part of this publication m
3、ay be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-4970 (outside U
4、SA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/AMS3801/2BAEROSPACEMATERIALSPECIFICATIONAMS3801/2 REV. B Issued 1984-04 Reaffirmed 2001-01 Re
5、vised 2011-06Superseding AMS3801/2A Cloth, Parachute, Meta-Aramid, Low Modulus 6.5(220) Weight, Special Weave RATIONALE This document is being edited to conform to existing formats and submitted for re-affirmation as a result of the 5 year review process. 1. SCOPE 1.1 Form This specification covers
6、one weight and one weave of low-modulus meta-aramid cloth. 1.2 Application Primarily for use in construction of parachutes. 1.3 Classification 6.5 ounces per square yard (220 g/m2) low-modulus meta-aramid cloth with special weave. 2. APPLICABLE DOCUMENTS See AMS3801. 3. TECHNICAL REQUIREMENTS 3.1 Ba
7、sic Specification The complete requirements for procuring the cloth described herein shall consist of this document and the latest issue of the basic specification, AMS3801. Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted withou
8、t license from IHS-,-,-SAE AMS3801/2B Page 2 of 4 3.2 Construction and Properties 3.2.1 Yarn Yarn used in weaving the cloth shall be a low-modulus meta-aramid with a carbonization (char) temperature not lower than 671 F (355 C). 3.2.1.1 Denier and Filament Count The yarn shall be 200 denier 15 and s
9、hall consist of 100 filaments 10. 3.2.1.2 Ply The yarn shall be 2 ply. 3.2.1.3 Twist The final ply of yarn shall be twisted 2.5 to 2.8 turns per inch (25.4 mm). 3.2.2 Cloth 3.2.2.1 Weave Shall be as shown in Figure 1. 3.2.2.2 Color Shall be Sage Green 1565 as shown in FED-STD-595. The color shall be
10、 obtained by the use of melt spun solution dyed yarn. 3.2.2.3 pH Shall be 5.0 to 8.0, incl, determined on the water extract of the finished cloth. 3.2.2.4 Width The width, inclusive of selvage, shall be as ordered. 3.2.2.5 Weight Shall not exceed 6.5 ounces per square yard (220 g/m2).3.2.2.6 Breakin
11、g Strength Breaking strength of the unaged cloth shall be not less than 265 pounds force per inch (46 409 N/m) in both warp and fill directions. Breaking strength after heat aging shall be not less than 85% of the unaged values in both the warp and fill directions. 3.2.2.7 Elongation Shall be not le
12、ss than 25% in the warp and fill directions. Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AMS3801/2B Page 3 of 4 3.2.2.8 Tearing Strength Shall be not less than 20 pounds force (89 N) in warp
13、and fill directions. 3.2.2.9 Thickness Shall not exceed 0.020 inch (0.51 mm). 3.2.2.10 Air Permeability Shall be 50 to 80 cubic feet per minute for each square foot (15.5 to 24.5 m3/minute for each m2) of surface tested. 3.2.2.11 Count Warp ends shall be not less than 63 per inch (25.4 mm). Filling
14、picks shall be not less than 48 per inch (25.4 mm). 3.3 Length and Put-up The cloth shall be put up in rolls in accordance with AMS3801, paragraph 5.1. Each roll shall contain not less than 80 yards (73 m) nor more than 200 yards (183 m). Each roll of 100 yards (91 m) or less shall contain not more
15、than 2 pieces and each roll over 100 yards (91 m) shall contain not more than 3 pieces. Each piece shall contain not less than 40 yards (37 m). 4. QUALITY ASSURANCE PROVISIONS See AMS3801. 5. PREPARATION FOR DELIVERY See AMS3801. 6. ACKNOWLEDGMENT See AMS3801. 7. REJECTIONS See AMS3801. 8. NOTES See
16、 AMS3801. PREPARED BY AMS COMMITTEE “P” Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AMS3801/2B Page 4 of 4 FIGURE 1 - WEAVE DESIGN Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
