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 theref
2、rom, 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 2007 SAE International All rights reserved. No part of this publication ma
3、y 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: 724-776-4970 (outside USA)
4、Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org AMS 3819C AEROSPACE MATERIAL SPECIFICATION Issued JUL 1987 Revised AUG 2007 Superseding AMS 3819B Cloths, Cleaning For Aircraft Primary and Secondary Structural Surfaces RATIONALE This specification is being revised t
5、o include a restructured classification system (with a new class of cloth), updated extractable matter limits, and additional changes associated with the five-year review. 1. SCOPE 1.1 Form This specification covers both woven and nonwoven absorbent materials supplied either as dry cloths or presatu
6、rated cloths for solvent cleaning process applications. 1.2 Application These cloths have been typically used in cleaning smooth or textured, metallic and nonmetallic surfaces preparatory to processing operations which are sensitive to residual surface contamination, but usage is not limited to such
7、 applications. Cloths qualified to this specification are not intended for use on transparencies. 1.3 Classification Cloths covered by this specification are classified as follows: Class 1 Virgin cloth, composed of 100% cotton fibers, with or without added binders. Class 2 Virgin cloth, composed of
8、100% synthetic or blended synthetic, cotton, or cellulose materials, with or without added binders, which remain stable up to 400 F (204 C). Class 3 Empty classification (formerly presaturated cloths - see Form 2). Class 4 100% polyester knit without binders. Grade A For use in cleaning operations w
9、here exceptionally low residual surface contamination levels are required. Grade B For use in cleaning operations where low residual surface contamination levels are required. Form 1 Dry cloths (in individual wipes or rolls). Form 2 Cloths contained in a presaturated wiping system, except that binde
10、rs, surfactants, or other chemical treatments shall not be included (See 8.6). Solvents used in the presaturation process shall be designated and approved as acceptable by the purchaser. Note: Purchaser should ensure that solvent and cloth used in presaturated wiping system are compatible and adequa
11、te for desired cleaning application. SAE AMS 3819C - 2 - 1.3.1 Grade A cloths may be substituted for Grade B at any time for processing operations. 1.3.2 If no classification of cloth is specified, a Grade A, Form 1 cloth of either Class 1 or Class 2 shall be the default. 2. APPLICABLE DOCUMENTS The
12、 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 issue is specified. When the referenced document has been canceled
13、and no superseding document has been specified, the last published issue of that document shall apply. 2.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org. AMS 3
14、167 Solvents, Wipe for Cleaning Prior to Application of Primer and Top Coat Materials, or Sealing Compounds ARP1917 Clarification of Terms Used in Aerospace Metals Specifications 2.2 ASTM Publications Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 1942
15、8-2959, Tel: 610-832-9585, www.astm.org. ASTM D 329 Acetone ASTM D 740 Methyl Ethyl Ketone ASTM D 1117 Evaluating Nonwoven Fabrics ASTM D 1193 Reagent Water ASTM D 1776 Conditioning Testing Textiles ASTM D 1836 Commercial Hexanes ASTM D 2257 Extractable Matter in Textiles ASTM D 3776 Mass per Unit A
16、rea (Weight) of Fabric ASTM E 70 pH of Aqueous Solutions with the Glass Electrode ASTM E 168 General Techniques of Infrared Quantitative Analysis 2.3 PRI Publications: Available from Performance Review Institute, 161 Thorn Hill Road, Warrendale, PA 15086-7527, Tel: 724-772-1616, www.pri-network.org.
17、 PD 2000 Procedures for An Industry Qualified Product Management Process PRI QPL AMS 3819 Products Qualified Under AMS 3819 3. TECHNICAL REQUIREMENTS 3.1 Construction Cloths shall be oriented into a planar assembly by woven or nonwoven techniques to yield a dry cloth weight of 1.0 to 6.0 ounces per
18、square yard (34 to 203 g/m2). 3.2 Binder Binding materials shall be water insoluble and shall not exceed 5% of the dry cloth weight. SAE AMS 3819C - 3 - 3.3 Color Cloths shall be white or off-white. 3.4 Cleanliness Cloths shall be visibly clean and free of discoloration, embedded particles, oils, gr
19、eases, and other nonspecification materials, determined in accordance with 4.5.2. 3.5 Workmanship Cloths shall be manufactured by the best available commercial practices and shall meet all technical requirements of this specification. 3.5.1 Cloths shall be free of broken, starched, stiffened, or nap
20、ped fibers, and free of uneven, ragged, or frayed edges that result in excessive linting. Class 2, Form 1 or 2 cloths may contain uneven edges created by the separation (i.e. perforation attachment points) of individual sheets from perforated rolls. 3.5.2 Class 1 and Class 4, Form 1 cloths shall be
21、scoured to remove natural oils. 3.5.3 Cloths shall be free of silicone oils and residues, determined in accordance with ASTM E 168. Infrared analysis to determine the presence of silicone shall be completed in accordance with 4.5.7 using samples prepared from the ASTM D 1836 hexane extractant as ref
22、erenced in 3.6.6. 3.6 Properties Cloths shall conform to the following requirements (tests shall be performed on the cloths supplied, and in accordance with specified test methods insofar as practicable): 3.6.1 Weight Cloth weight shall be within 10% of the qualification cloth weight, determined in
23、accordance with ASTM D 3776. 3.6.2 Water Absorption When tested for water absorptive capacity, cloths shall absorb not less than 400% of the dry cloth weight. Class 4 cloths shall be exempt from this requirement. 3.6.2.1 Water Absorptive Capacity Cloths shall be tested in accordance with ASTM D 1117
24、 and 4.5.3. 3.6.3 Linting Cloths shall lint not more than 10 milligrams per square foot. For acceptance tests, linting shall be determined using the procedure described in 4.5.4.1 and 4.5.4.2. For qualification tests, linting shall be determined using the qualification test procedure described in 4.
25、5.4.3 and 4.5.4.4. 3.6.4 Cloth Integrity Specimens tested for linting properties as in 3.6.3 shall not tear on the screen of the U.S. Standard No. 40 sieve as a result of the 25 circumferential stroke linting test. 3.6.5 Fiber/Binder Integrity Cloths shall leave no visible residue on the glass surfa
26、ces after testing in accordance with 4.5.5. SAE AMS 3819C - 4 - 3.6.6 Extractable Matter Cloths shall meet the requirements of Table 1, determined in accordance with 4.5.6. TABLE 1 - DETERMINATION OF EXTRACTABLE MATTER Extractant Specification Extractant Chemical Name Extractable Matter % Maximum Gr
27、ade A Extractable Matter% Maximum Grade B ASTM D 1193, Type IV ASTM D 1836 ASTM D 740 AMS 3167, Type 2 (See 8.7) Reagent Water Hexane Methyl Ethyl Ketone Wipe Solvent 0.75 0.75 0.75 0.75 1.00 1.00 1.00 1.00 3.6.7 pH of Water Extract The pH of the water extract shall be 6.0 to 7.5, as determined in a
28、ccordance with 4.5.8. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for Inspection The manufacturer or supplier of the cloths shall supply all samples and shall be responsible for the performance of the required tests. The purchaser reserves the right to sample and to perform any confirmatory t
29、esting deemed necessary to ensure that the cloths conform to specified requirements. 4.2 Classification of Tests 4.2.1 Acceptance Tests Weight (3.6.1), linting (3.6.3), cloth integrity (3.6.4), extractable matter (3.6.6), and pH (3.6.7) are acceptance tests and shall be performed on each lot of clot
30、h material. 4.2.2 Qualification Tests All technical requirements of this specification are qualification tests and shall be performed prior to, or on the initial shipment of cloths by the manufacturer or supplier. When a change in approved product formulation, critical raw materials or suppliers, ba
31、sic methods of manufacture, testing, or geographic location occurs, requalification of the revised material shall be required. A revised supplier designation shall be requested. 4.3 Sampling and Testing Shall be as follows: 4.3.1 For Acceptance Tests Sufficient cloths shall be taken at random from e
32、ach 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 cloths of the same class and grade produced in one continuous production run a
33、nd presented for the manufacturers or suppliers inspection at one time. An inspection lot for woven cloth material shall not exceed 5000 pounds (2268 kg). An inspection lot for nonwoven cloth material shall not exceed 50,000 pounds (22,700 kg). 4.3.1.2 A statistical sampling plan, acceptable to the
34、purchaser in lieu of sampling as in 4.3.1, may be used and the report of 4.6 shall state that such plan was used. SAE AMS 3819C - 5 - 4.3.2 For Qualification Tests As agreed upon by both purchaser and manufacturer or supplier. 4.4 Approval 4.4.1 All cleaning cloths supplied to this specification sha
35、ll be listed, or approved for listing, on the qualified products list, PRI QPL AMS 3819, which can be found at www.eAuditN. The qualified products list shall be in accordance with PD 2000. 4.4.2 The manufacturer shall use ingredients, manufacturing procedures, processes, and methods of inspection on
36、 production cloths which are essentially the same as those used on the approved sample cloths. If necessary to make any change in materials, in type of equipment for processing, or in manufacturing procedures, the manufacturer shall submit for reapproval a statement of the proposed changes in materi
37、als and/or processing, and when requested, sample cloths. Production cloths made by the revised procedure shall not be shipped prior to receipt of approval. 4.5 Test Methods Tests to determine conformance to the requirements of this specification shall be conducted as follows: 4.5.1 Test Conditions
38、Except where otherwise specified herein, all cloths shall be preconditioned in accordance with ASTM D 1776 prior to testing. Where an environmental chamber is utilized for preconditioning, the test area environment shall be maintained at 65 to 85 F (18 to 29 C) and a relative humidity of 50 to 70%.
39、4.5.2 Cleanliness Not less than ten cloths shall be examined under 5X magnification and an impinging light source with an illuminance of 750 to 850 foot candles (8073 to 9149 lux), measured at a distance of 6 inches (152 mm). Acceptability of all ten cloths shall be reported as pass or fail. 4.5.3 W
40、ater Absorptive Capacity The test specimen shall consist of a full-size cloth sample, up to 8 inches by 8 inches (203 mm by 203 mm), and consisting of six plies cut at approximately equally spaced intervals across the sample sheet on a line 45 degrees to the edge of the sheet. If the specimen is exc
41、essively bulky or weighs more than 2.73 ounce per square yard (92.6 g/m2) or both, three plies may be used instead of six. Three test specimens shall be used for this test. 4.5.4 Linting 4.5.4.1 Acceptance Testing Cloth linting shall be determined using the average weight of lint obtained from the t
42、esting of ten cloth samples. A new cloth shall be used for each of the ten weight determinations. Each sample to be tested shall be securely wrapped on a cylindrical mandrel of the type shown in Figure 1, so as to prevent wrinkles or folds at the contact surface. The cloth may be secured with a rubb
43、er ring or with tape. Tape may also be used to conceal any open edges of the cloth sample. The cylindrical mandrel shall weigh 460 grams 10, with a contact surface diameter of 2.0 inches 0.1 (5.08 mm 0.25) and all corner transitions radiused at 0.5 inch (12.7 mm). Other equipment shall be one 8-inch
44、 (203 mm) diameter, No. 40 (425 m) U.S. Standard sieve with drop pan which has been solvent washed using ASTM D 329 acetone, then dried to constant weight at 150 F 2 (65 C 1) for one hour; one analytical balance with a rated sensitivity of 0.1 milligram; aluminum foil approximately 9 inches (228 mm)
45、 in diameter, sufficient to line the drop pan. SAE AMS 3819C - 6 - 4.5.4.2 Procedure After weighing the aluminum foil to the nearest 0.1 mg (W1) using the analytical balance, place the foil within the drop pan and install the No. 40 sieve on the drop pan. The aluminum foil will act as the collection
46、 medium for any lint passing through the sieve assembly. Wrap two cloth plies securely around the mandrel so as to prevent wrinkles and folds at the contact surface. Place the contact surface of the wrapped mandrel on the sieve screen, and while maintaining the mandrel in a fixed orientation normal
47、to the surface of the No. 40 sieve, move the mandrel around the circumference of the sieve in a continuous motion for 25 complete revolutions at approximately five revolutions per minute. Remove the cloth plies and examine for tearing. Without disassembling the sieve, repeat the procedure nine addit
48、ional times using new cloth plies for each repetition. Upon completion of ten sample tests, carefully disassemble the drop pan and remove the aluminum foil with collected lint from the drop pan. Weigh the aluminum foil and lint to the nearest 0.1 mg using the analytical balance. Calculate linting ac
49、cording to Equation 1: 144A-W2W110- = Linting in mg/square feet(Eq. 1) where: A = contact surface area of bar in square inches W1= weight of aluminum foil W2= weight of aluminum foil plus lint generated 4.5.4.3 Qualification Testing Cloth linting shall be determined using the average weight of lint obtained from the testing of ten cloth samples. A new cloth shall be used for each of the ten weight determinations. Each sample to be tested shall be securely wrapped on a cylindrical mandrel of the t
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