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1、 WORLDWIDE ENGINEERING STANDARDS Test Method Materials GMW3347 Lint Retention of Textile Materials Copyright 2006 General Motors Corporation All Rights Reserved August 2006 Originating Department: North American Engineering Standards Page 1 of 3 1 Scope This test method is used to determine the resi
2、stance to lint retention of automotive fabrics. Note: Nothing in the specification supersedes applicable laws and regulations unless specific exemption has been obtained. Note: In the event of conflict between the English and domestic language, the English language shall take precedence. 2 Reference
3、s Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. ASTM D3512 2.2 GM Standards/Specifications. GMW3221 3 Test Equipment 3.1 Random Tumble Pilling Tester with the follow- ing accessories: 3.1.1 Air injection device to give 17.5
4、 3.5 kPa in each test chamber, either included in new testers or a modification to older tester. 3.1.2 Cork cylinder liners, 146 1 mm by 452 1 mm cut from 1.5 0.25 mm thick flat sheet. The original surface of the liner, produced by slicing the material, should be used without any further treatment s
5、uch as sanding. 3.1.3 Cotton sliver, 5 300 tex fine Egyptian Karnak gray colored fiber such as Atlas #02-2530-00, or equivalent. Note: Tester and accessories are available from Atlas Electric Devices Co., 4114 N. Ravenswood Ave., Chicago IL 60613. 3.2 Vacuum cleaner, canister type, with a soft brush
6、 attachment. Note: Vacuum used with the Taber test machine at the highest power setting possible, is acceptable. The soft brush attachment shall have approx- imately 45 mm long bristles. 3.3 Apparatus for conditioning to the appropriate requirements as described in GMW3221 Code A, unless otherwise s
7、pecified in the relevant materials specification. 3.4 Double coated tape, used to adhere the cork liners to the test chambers. 3.5 Isopropyl alcohol and ASTM D3512 (GME). 11.2 Revisions. Rev Approval Date Description (Organization) A DEC 2000 Editorial revision (GMNA) B MAY 2006 Changed Section 3.2.15 to reduce the number of strokes to 10. Corrected reference in Section 2 from GMW3321 to GMW3221. (Global TDG)
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