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/AMS3673CAEROSPACEMATERIALSPECIFICATIONAMS3673 REV. C Issued 1986-07 Revised 2011-06Supersedin
5、g AMS3673B Cloth, Glass Aluminum Face, Silicone Rubber Back RATIONALE This document is being revised and updated as a result of the 5 year review. 1. SCOPE 1.1 Form This specification covers one type of glass cloth coated on one face with aluminum and the other face with silicone rubber. 1.2 Applica
6、tion Primarily for use as a thermal curtain for protection of personnel and equipment from short-time exposure to high intensity thermal radiation. 1.3 Safety - Hazardous Materials While the materials, methods, applications, and processes described or referenced in this specification may involve the
7、 use of hazardous materials, this specification does not address the hazards which may be involved in such use. It is the sole responsibility of the user to ensure familiarity with the safe and proper use of any hazardous materials and to take necessary precautionary measures to ensure the health an
8、d safety of all personnel involved. 2. APPLICABLE DOCUMENTS The issue of the following documents in effect on the date of the purchase order forms a part of this specification to the extent specified herein. The supplier may work to a subsequent revision of a document unless a specific document issu
9、e is specified. When the referenced document has been cancelled and no superseding document has been specified, the last published issue of that document shall apply. SAE AMS3673C Page 2 of 11 2.1 U.S. Government Publications Available from the Document Automation and Production Service (DAPS), Buil
10、ding 4/D, 700 Robbins Avenue, Philadelphia, PA 19111-5094, Tel: 215-697-6257, http:/assist.daps.dla.mil/quicksearch/.FED-STD-4 Glossary of Fabric Imperfections FED-STD-191 Textile Test Methods MIL-STD-1487 Glossary of Cloth Coating Imperfections 2.2 ASQ Documents Available from American Society for
11、Quality, Quality Press, 600 North Plankinton Avenue, Milwaukee, WI 53203, Tel: 800-248-1946, http:/qualitypress.asq.org.ANSI/ASQ Z1.4 Sampling Procedures and Tables for Inspection by Attributes 3. TECHNICAL REQUIREMENTS 3.1 Materials 3.1.1 Base Cloth The warp and filling yarns used in the manufactur
12、e of the base cloth shall be 100% continuous filament glass yarns. 3.1.2 Coated Cloth The cloth shall consist of a base fabric of glass yarn which has been evenly and uniformly coated on one surface with a suitably-compounded silicone rubber. On the opposite surface shall be a highly-reflective laye
13、r of vacuum distilled aluminum directly adhered to the warp face by means of a curable, highly-flexible, solvent resistant adhesive bonding composition.3.2 Properties Cloth shall conform to the following requirements, determined in accordance with specified test methods of FED-STD-191 except as othe
14、rwise specified herein: 3.2.1 Base Cloth Shall be as follows: SAE AMS3673C Page 3 of 11 TABLE 1 Paragraph Property Requirement Test Method 3.2.1.1 Construction, ends and picks per inch (25.4 mm) 64 x 60 5050 3.2.1.2 Thickness, maximum 0.008 inch (0.20 mm) 5030 3.2.1.3 Weight, maximum 6.70 ounces/squ
15、are yard (227.2 g/m2)50413.2.1.4 Breaking Strength, minimum Warp Filling 130 pounds force/inch (22 766 N/m) 90 pounds force/inch (15 761 N/m) 51023.2.1.5 Weave Crowfoot Satin Visual 3.2.2 Coated Cloth Shall be as follows: TABLE 2 Paragraph Property Requirement Test Method 3.2.2.1 Weight 16 ounces/sq
16、uare yard 2 (542 g/m2 68) 50413.2.2.2 Thickness 0.0150 inch 0.0015 (0.381 mm 0.038) 50303.2.2.3 Width As Ordered 5020 3.2.2.4 Breaking Strength (Cut Strip), minimum Warp Filling 150 pounds force/inch (26 269 N/m) 150 pounds force/inch (26 269 N/m) 51023.2.2.5 Tear Strength, minimum Warp Filling 3.0
17、pounds force (13.3 N) 3.0 pounds force (13.3 N) 51343.2.2.6 Cold Crack Rubber Coating Warp and Filling Aluminum Coating Warp and Filling No Cracking No Cracking 4.5.13.2.2.7 Coating Adhesion, minimum 4.0 pounds force/inch (701 N/m) 59703.2.2.7.1 Adhesive shall be cured in accordance with FED-STD-191
18、, Method 5970, except that the cure cycle shall be 48 hours 1 at 77 F 5 (25 C 3) SAE AMS3673C Page 4 of 11 Paragraph Property Requirement Test Method 3.2.2.8 Resistance to Blocking Cloth heated for 2 hours 0.1 Aluminum to Rubber Aluminum to Aluminum Rubber to Rubber No Blocking No Blocking No Blocki
19、ng 58723.2.2.9 Stiffness, maximum Warp Filling 0.015 inch-pound (0.0017 Nm) 0.015 inch-pound (0.0017 Nm) 52023.2.2.10 Thermal Radiation Resistance Thermal Response, maximum First Exposure 4.5.2First Exposure 2.0 F x ft2per BTU (0.84 C x m2/k cal) Second Exposure 2.1 F x ft2per BTU (0.88 C x m2/k cal
20、) Third Exposure 2.1 F x ft2per BTU (0.88 C x m2/k cal) 3.2.2.11 Abrasion Resistance Thermal Response after Abrasion, maximum 4.5.3 First Exposure 3.0 F x ft2per BTU (1.26 C x m2/k cal) Second Exposure 3.1 F x ft2per BTU (1.30 C x m2/k cal) Third Exposure 3.1 F x ft2per BTU (1.30 C x m2/k cal) 3.2.2
21、.12 Flame Resistance, maximum Flame Time Glow Time10 seconds 2 seconds 59033.2.2.13 Visible Damage No burning, blistering, or delamination Visual3.3 Quality The cloth, as received by purchaser, shall be evenly woven, and free from foreign materials and from imperfections detrimental to usage of the
22、cloth. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection The vendor of cloth shall supply all samples for vendors tests and shall be responsible for performing all required tests. Purchaser reserves the right to sample and to perform any confirmatory testing deemed necessary to ensur
23、e that the cloth conforms to the requirements of this specification. SAE AMS3673C Page 5 of 11 4.2 Classification of Tests 4.2.1 Acceptance Tests Tests for the following requirements are acceptance tests and shall be performed on each lot: 4.2.1.1 Weight (3.2.1.3), breaking strength (3.2.1.4), and w
24、eave (3.2.1.5) of the base cloth. 4.2.1.2 Weight (3.2.2.1), breaking strength (3.2.2.4), tear strength (3.2.2.5), cold crack (3.2.2.6), thermal radiation resistance (3.2.2.10), flame resistance (3.2.2.12), and quality (3.3) of the coated cloth. 4.2.2 Preproduction Tests Tests for all technical requi
25、rements are preproduction tests and shall be performed prior to or on the initial shipment of cloth to a purchaser, when a change in ingredients and/or processing requires reapproval as in 4.4.2, and when purchaser deems confirmatory testing to be required. 4.2.2.1 For direct U.S. Military procureme
26、nt, substantiating test data, and, when requested, preproduction test material shall be submitted to the cognizant agency as directed by the procuring activity, contracting officer, or request for procurement. 4.3 Sampling and Testing Shall be as follows: 4.3.1 For Acceptance Tests Except as specifi
27、ed in 4.3.1.6, sufficient cloth shall be taken from each lot to perform all required tests. The number of determinations for each requirement shall be as specified in the applicable test procedure or, if not specified therein, not less than three. 4.3.1.1 A lot shall be all cloth produced in a singl
28、e production run under the same fixed conditions and presented for vendors inspection at one time. 4.3.1.2 The sample unit for the base cloth shall be 2.5 yards (2.3 m) full width. The sample size (number of units) shall be as shown below. The lot size shall be expressed in units of 1 linear yard (1
29、 linear m). The lot shall be unacceptable if one or more sample units fail to meet any specified requirements. TABLE 3 Lot Size Yards Lot Size Meters Sample Size Up to 800, incl Up to 732, incl 2 Over 800 to 2000, incl Over 732 to 1829, incl 3 Over 2000 Over 1829 5 SAE AMS3673C Page 6 of 11 4.3.1.3
30、Yard-by-Yard (Meter-by-Meter) Examination 4.3.1.3.1 Base Cloth The sample unit for the base cloth shall be 0.25 yard (0.2 m) full width. A sample shall be taken from each lot. A lot of cloth shall consist of 2000 yards (1829 m), or fraction thereof. The lot shall be unacceptable if the sample fails
31、to meet any requirement specified. The sample shall be examined on the face side only for all imperfections as defined in FED-STD-4, Section I. All imperfections which are noticeable at the normal inspection distance of 3 feet (1 m) shall be scored and assigned demerit points as specified in 4.3.1.3
32、.2. The lot shall be unacceptable if the demerit points per 100 square yards (84 m2) of the total examined exceed 20. Point computation for lot quality shall be as follows: 4.3.1.3.1.1 In inch/pound units: Total points scored in sample x 3600Width of cloth, inch, x total length inspected, yard-Point
33、s per100 square yards=(Eq. 1) 4.3.1.3.1.2 In SI units: Total points scored in sample x 100,000Width of cloth, mm, x total length inspected, m-Points per100 m2=(Eq. 2) 4.3.1.3.2 Demerit Points Shall be assigned as follows: TABLE 4 Imperfection Points For imperfections 3 inches (76 mm) or under in any
34、 dimension 1 For imperfections over 3 to 6 inches (76 to 152 mm), incl, in any dimension 2For imperfections over 6 to 9 inches (152 to 229 mm), incl in any dimension 3For imperfections over 9 inches (229 mm) in any dimension 4 4.3.1.3.3 Coated Cloth All coated cloth shall be examined on both sides.
35、The visual imperfections shall be scored for imperfections as classified in Table 5. The visual imperfections shall be counted regardless of their proximity to each other, except where two or more imperfections represent a single local condition of the cloth; in which case, the imperfection shall be
36、 counted only once in a single yard (meter). The same yard (meter) shall be given a through-lighting inspection for pinholes and areas of missing film. The through-lighting equipment shall be as specified in MIL-STD-1487. The sample unit shall be 1 linear yard (1 linear m). The inspection level shal
37、l be in accordance with ANSI/ASQ Z1.4, Level II. SAE AMS3673C Page 7 of 11 TABLE 5 - CLASSIFICATION OF IMPERFECTIONS FOR COATED CLOTH Imperfection Description Aluminum Side Abrasion Marks Coating Unmetallized Spots Where aluminum is missing from fabric. Improperly adhering to fabric. Any unmetallize
38、d spots. Silicone Rubber Side Blisters or Loose Coating Over 0.250 inch (6.35 mm) square or 4 under 0.250 inch (6.35 mm) square per 5 running yards (4.6 m). Creases Creased area is uncoated. Cuts All sizes. Light Area Coating missing under 1 inch (25 mm) square in area. Over 1 inch (25 mm) square is
39、 a critical imperfection. Lumps and Foreign MatterOver 0.250 inch (6.35 mm) square or 4 under 0.250 inch (6.35 mm) square per 5 running yards (4.6 m). Pinholes All sizes. Splice Marks and Coating ImpressionsAll sizes when coating is missing and under 1 inch (25 mm) square in area. Over 1 inch (25 mm
40、) square in area is a critical imperfection. Stains Oil and dirt stains over 1 inch (25 mm) square in area or 5 stains under 1 inch (25 mm) square in 5 running yards (4.6 m). Streaks Coating missing under 1 inch (25 mm) square in area. Coating missing over 1 inch (25 mm) square in area is acritical
41、imperfection. Strike-through All strike-through marks of coating compound to aluminum face of cloth are imperfections. Tears All sizes. SAE AMS3673C Page 8 of 11 4.3.1.4 Examination for Length The roll shall be examined for gross length. Any gross length found to be less than the specified minimum l
42、ength or any gross length found to be more than 2 yards (1.8 m) below the gross length marked on the piece ticket shall be considered an imperfection with respect to length. 4.3.1.5 When a statistical sampling plan has been agreed upon by purchaser and vendor, sampling shall be in accordance with su
43、ch plan in lieu of sampling as in 4.3.1 and the report of 4.6 shall state that such plan was used. 4.3.2 For Preproduction Tests As agreed upon by purchaser and vendor. 4.4 Approval 4.4.1 Sample cloth shall be approved by purchaser before cloth for production use is supplied, unless such approval be
44、 waived by purchaser. Results of tests on production cloth shall be essentially equivalent to those on the approved sample cloth. 4.4.2 Vendor shall use ingredients, manufacturing procedures, processes, and methods of inspection on production cloth which are essentially the same as those used on the
45、 approved sample cloth. If necessary to make any change in ingredients or processing, in type of equipment for processing, or in manufacturing procedures, vendor shall submit for reapproval a statement of the proposed changes in ingredients and/or processing and, when requested, sample cloth. Produc
46、tion cloth made by the revised procedure shall not be shipped prior to receipt of reapproval. 4.5 Test Methods 4.5.1 Cold Crack A 1 x 4 inch (25 x 102 mm) specimen with the long direction warpwise and a 1 x 4 inch (25 x 102 mm) specimen with the long dimension fillingwise shall be exposed for 4 hour
47、s 0.1 at -67 F 2 (-55 C 1) in a jig assembly as specified in Figure 1. While still at this temperature, the specimen shall be bent sharply, aluminum side out, over a 0.125 inch (3.18 mm) diameter rod so that the back of the specimen touches within 0.125 inch (3.18 mm) distance directly behind the ro
48、d. An additional set of specimens shall be tested with the rubber side to the outside of the bend. The specimen shall be examined visually for evidence of cracking, stiffening, flaking, or separation of either coating from the cloth. 4.5.2 Thermal Radiation Resistance This test is to determine the resistance to multiple exposures from a high energy source of intense thermal radiation. The aluminum surface shall be irradiated at a l
