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/AMS3801/4BAEROSPACEMATERIALSPECIFICATIONAMS3801/4 REV. B Issued 1984-04 Reaffirmed 2001-01 Re
5、vised 2011-06Superseding AMS3801/4A Cloth, Parachute, Meta-Aramid, Low Modulus 7.0(237) Weight, Plain 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 on
6、e weight and one weave of low-modulus meta-aramid cloth. 1.2 Application Primarily for use in construction of parachutes. 1.3 Classification 7.0 ounces per square yard (237 g/m2) low-modulus meta-aramid cloth with plain weave. 2. APPLICABLE DOCUMENTS See AMS3801. 3. TECHNICAL REQUIREMENTS 3.1 Basic
7、Specification The complete requirements for procuring the cloth described herein shall consist of this document and the latest issue of the basic specification, AMS3801. 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
8、(char) temperature not lower than 671 F (355 C). Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AMS3801/4B Page 2 of 3 3.2.1.1 Denier and Filament Count The yarn shall be 200 denier 15 and shall
9、 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 plain 1-up, 1-down. 3.2.2.2 Color Shall be Sage Green 1565 as shown in FED-STD-595. The color shall be obtai
10、ned 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 7.0 ounces per square yard (237 g/m2).3.2.2.6 Breaking Stre
11、ngth Breaking strength of the unaged cloth shall be not less than 250 pounds force per inch (43 782 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 less tha
12、n 35% in the warp and not less than 25% in the fill directions. 3.2.2.8 Tearing Strength Shall be not less than 15 pounds force (66.7 N) in the warp and fill directions. 3.2.2.9 Thickness Shall not exceed 0.015 inch (0.38 mm). Copyright SAE International Provided by IHS under license with SAENot for
13、 ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE AMS3801/4B Page 3 of 3 3.2.2.10 Air Permeability Shall be not greater than 8 cubic feet per minute for each square foot (2.45 m3/minute for each m2) of surface tested. 3.2.2.11 Count Warp ends shall be not less than 60 p
14、er inch (25.4 mm). Filling picks shall be not less than 45 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 (182 m). Each roll of 100 yards (91 m) or l
15、ess shall contain not more 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 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-,-,-
