1、 WORLDWIDE ENGINEERING STANDARDS Test Procedure GMW3347 Lint Pickup and Retention of Textile Materials Copyright 2011 General Motors Company All Rights Reserved August 2011 Originating Department: North American Engineering Standards Page 1 of 3 1 Scope Note: Nothing in this standard supercedes appl
2、icable laws and regulations. Note: In the event of conflict between the English and domestic language, the English language shall take precedence. 1.1 Purpose. This test method is used to determine the resistance to lint pickup and retention of automotive fabrics. 1.2 Foreword. Not applicable. 1.3 A
3、pplicability. Not applicable. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications. None 2.2 GM Standards/Specifications. GMW3221 3 Resources 3.1 Facilities. Not applicable. 3.2 Equipment. 3.2.1 Random Tumble Pilling T
4、ester with the following accessories: 3.2.2 Air injection device to give 17.5 3.5 kPa in each test chamber either included in new testers or a modification to older testers. 3.2.3 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, prod
5、uced by slicing the material, should be used without any further treatment such as sanding. 3.2.4 Cotton sliver, 5300 tex fine Egyptian Karnak gray colored fiber such as Atlas No. 02-2530-00 or equivalent. Note: Tester and accessories are available from Atlas Electric Devices Co., 4114 N. Ravenswood
6、 Ave., Chicago, IL 60613. 3.2.5 Vacuum cleaner, canister type, with a soft brush attachment. Note: Vacuum used with the Taber test machine at the highest power setting possible is acceptable. The soft brush attachment shall have approximately 45 mm long bristles. 3.2.6 Apparatus for conditioning to
7、the appropriate requirements as described in GMW3221 Code A, unless otherwise specified in the relevant materials specification. 3.2.7 Double coated tape used to adhere the cork liners to the test chambers. 3.2.8 Isopropyl alcohol and clean white cloth used to clean the blades and chambers. 3.2.9 Di
8、e or template and scissors used to cut the test specimens. 3.2.10 Stapler used to prepare the test specimens. 3.3 Test Vehicle/Test Piece. Not applicable. 3.4 Test Time. Calendar time: 1 day Test hours: 0.5 hour Coordination hours: 0.5 hour 3.5 Test Required Information. Not applicable. 3.6 Personne
9、l/Skills. Not applicable. 4 Procedure Lint pickup and retention is simulated on a laboratory testing machine by a random rubbing action produced by tumbling three specimens with a small amount of cotton fiber in a cylindrical test chamber lined with a mildly abrasive material. After testing, one spe
10、cimen is evaluated for lint pickup. After vacuuming the remaining two specimens, the retained lint observed is reported using an arbitrary rating scale. 4.1 Preparation. 4.1.1 Unless otherwise specified in the relevant material specification, conditioning shall be performed according to GMW3221 Code
11、 A. Condition test specimens and the cork liners. 4.1.2 Cut four test specimens each 105 1 mm by 105 1 mm in size along the bias direction (45 degree angle to warp). Take one test specimen and fold, face out, two diagonally opposite corners together. Overlap the corners, back to face, and Copyright
12、General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW3347 Copyright 2011 General Motors Company All Rights Reserved August 2011 Page 2 of 3 staple toget
13、her. Repeat with the remaining two corners. Repeat the folding procedure with two of the remaining cut test specimens (total of three). The fourth test specimen will be used as a control. 4.2 Conditions. 4.2.1 Environmental Conditions. Testing shall be conducted in a room complying with GMW3221 stan
14、dard conditions. 4.2.2 Test Conditions. Deviations from the requirements of this standard (e.g., number of test specimens, test specimen size, etc.) shall have been agreed upon between supplier and vehicle manufacturer. Such requirements shall be specified on component drawings, test certificates, r
15、eports, etc. 4.3 Instructions. 4.3.1 Fit a conditioned cork liner around the inner surface of a clean test chamber. The liner must fit snugly. To eliminate any tendency for the liner to rotate during testing, tape the two short edges at the join to the chamber wall with double coated tape. Note: Rep
16、lace the cork liners after 1 h use on each surface. 4.3.2 Cut 25 1 mm length of cotton sliver and weigh. Pull fiber from the bundle until the weight is 0.1 0.005 g. 4.3.3 Place the three folded test specimens and the cotton sliver into a test chamber. Place the cover on the chamber, and set the time
17、r for a running time of 5 0.5 minutes. Turn on the airflow and start the testing machine. 4.3.4 If a specimen hangs up (wedges around the impeller without tumbling) or lies on the bottom of the chamber without movement during testing, stop the machine and the timer, remove the face plate and free th
18、e specimen. Resume testing. 4.3.5 If static attraction of fiber to impeller blade is observed, stop the test and clean the blade with a clean, white cloth saturated with isopropyl alcohol. Resume testing. 4.3.6 At the end of the run, remove test specimens from the chamber and remove the staples. Gen
19、tly shake off the excess fibers. Save one of the test specimens to illustrate lint pickup. 4.3.7 Clean off the remaining fibers on the last two test specimens using the following procedure. These test specimens illustrate lint retention. 4.3.7.1 Lay the test specimen flat on a 12 3 mm thick foam pad
20、. Vacuum the specimen until the specimen is completely void of any lint fibers or until 5 strokes are reached. One stroke is defined as a back and forth motion over the same area of the specimen. The specimen may be rotated as necessary to remove as much lint as possible within the limit of 5 stroke
21、s. 4.3.8 Mount the test specimens on stiff paper/card stock and label the lint pickup, lint retention and control test specimens appropriately. It is advisable to cover the mounted specimens with a piece of paper the same size as the card stock or to place the mounted specimens into a clear plastic
22、sleeve to protect the specimens. 4.3.9 After testing, clean the test chamber of all retained fiber. 5 Data 5.1 Calculations. Compare the lint pickup and retention test specimens to the control specimen and rate using the following rating scale. 5.1.1 Rating Scale. Reference Table 1. Table 1: Rating
23、Scale Rating Observation 10 = None: No fiber left on the fabric surface. 8 = Trace: Slight amount of fiber left on the fabric surface as seen with the aid of 10X maximum magnification. 6 = Moderate: Slight amount of fiber left on the fabric surface as seen with the naked eye. 4 = Annoying: Large amo
24、unt of fiber left on the fabric surface and/or a change in fabric appearance. 2 = Severe: Clumps of fiber entangled with the fabric surface or complete coverage of fabric surface by fiber. 5.2 Interpretation of Results. Not applicable. 5.3 Test Documentation. Report rating for lint pickup, average f
25、or lint retention and average number of vacuuming strokes on lab data form. 6 Safety This standard may involve hazardous materials, operations, and equipment. This standard does not propose to address all the safety problems associated with its use. It is the responsibility of the user of this stand
26、ard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-
27、,-GM WORLDWIDE ENGINEERING STANDARDS GMW3347 Copyright 2011 General Motors Company All Rights Reserved August 2011 Page 3 of 3 7 Notes 7.1 Glossary. Not applicable. 7.2 Acronyms, Abbreviations, and Symbols. Not applicable. 8 Coding System This standard shall be referenced in other documents, drawing
28、s, etc., as follows: Test to GMW3347 9 Release and Revisions This standard was originated in August 1999. It was first approved in June 2000. It was first published in June 2000. Issue Publication Date Description (Organization) 1 JUN 2000 Initial publication. 2 DEC 2000 Editorial revision. 3 AUG 20
29、06 Changed 3.2.15 to reduce the number of strokes to 10. Corrected reference in 2.2 from GMW3321 to GMW3221. (Global Textiles Development Group) 4 AUG 2011 Five year refresh of standard - placed in current Test Procedure template. Included wording for lint pickup testing and rating. (Textiles Global Subsystem Leadership Team) Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
