1、SURFACE VEHICLE RECOMMENDED PRACTICE J883 SEP2014 Issued 1965-04 Reaffirmed 2014-09 Superseding J883 MAY2008 Test Method for Determining Dimensional Stability of Automotive Textile MaterialsRATIONALE J883 has been reaffirmed to comply with the SAE five-year review policy. _ SAE Technical Standards B
2、oard 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 therefrom, is the sole responsib
3、ility of the user.” SAE reviews each technical report at least every five years at which time it may be revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions. Copyright 2014 SAE International All rights reserved. No part of this publication may be reproduce
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5、6-0790 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/J883_201409 1. SCOPE This test method can be used to determine the dimensional stability of textile material
6、s and vinyl-coated fabrics when subjected to conditions which cause changes in the moisture content of the materials. 2. REFERENCES There are no referenced publications specified herein. 3. TEST SPECIMENS A test specimen 300 3 mm x 300 3 mm shall be cut from the material to be tested with one direct
7、ion parallel to the machine direction (MD) and the other direction parallel to the across machine direction (AMD). 4. CONDITIONING The test specimen shall be conditioned for a minimum of 24 h at 23 C 2 C and 50% 5% relative humidity. 5. PROCEDURE 5.1 Mark off accurately a 250 3 mm x 250 3 mm square
8、concentric with the square outline of the specimen. This can be done with indelible ink, indelible pencil, or other suitable method, on whichever side of the material is more markable. Also, mark an arrow to indicate the MD of the specimen. 5.2 Place the specimen face side up flat without wrinkles o
9、n a 4 mesh screen surface measuring a minimum of 330 mm x 330 mm. Position a similar screen over the specimen using spacers at the corners of the two screens, so that the top screen is not in contact with the top surface of the test specimen. To test more than one specimen at one time, use additiona
10、l spacers and screens as required. 5.3 Immerse the specimen(s) and screens in a pan or tank of clean tap water containing 1 mL of a mild detergent1per 21 mL of water at 23 2 C for 1 h 5 minutes or as otherwise specified. 1AATCC 1993 Standard Reference Detergent without Optical Brighteners or equival
11、ent. 5.4 Remove the specimen(s) and screens from the water and allow to drip dry in an atmosphere having a temperature of 23 C 2 C and a relative humidity of 50% 5% for 30 5 min. If more than one specimen is being tested, separate the screens so that no specimen will drip on any other specimen. 5.5
12、Lay the specimen(s) flat on a table top. Measure the original 250 mm square with a scale calibrated in 1.0 mm. Make three measurements in both the MD and AMD directions. The measurements shall be made along the centerlines of the square and along lines parallel to and 50 mm in from each side. 5.6 Av
13、erage the three measurements in each direction and substitute in Equations 1 and 2: 100250250MDD1MD1= (Eq. 1) where: DMD1 = Machine Direction MD1= Machine Direction measurement wet 100250250AMDD1AMD1= (Eq. 2) where: DAMD1 = Across Machine Direction stability AMD1= Across Machine Direction measuremen
14、t wet A plus result indicates expansion and a minus result indicates shrinkage. 5.7 Replace the test specimen(s) on the screens and place the specimen(s) and screens in an air-circulating oven maintained at 80 C 2 C for 24 h. 5.8 Remove the specimen and screen from the oven and allow to cool in the
15、standard atmosphere described in 5.4 for 10 1 min. After cooling, place the specimen on a flat table top and remeasure as described in 5.5. 5.9 Average the three measurements in each direction and substitute in Equations 3 and 4: 100250250MDD2MD2= (Eq. 3) where: DMD2 = Machine Direction stability MD
16、2= Machine Direction measurement after drying 100250250AMDD2AMD2= (Eq. 4) where: DAMD2 = Across Machine Direction stability AMD2= Across Machine Direction measurement after drying A plus result indicates expansion and a minus result indicates shrinkage. SAE INTERNATIONAL J883 Reaffirmed SEP2014 Page
17、 2 of 3_ 6. NOTES 6.1 Marginal Indicia The change bar (l) located in the left margin is for the convenience of the user in locating areas where revisions have been made to the previous issue of the report. An (R) symbol to the left of the document title indicates a complete revision of the report. PREPARED BY THE SAE TEXTILE AND FLEXIBLE PLASTICS COMMITTEE SAE INTERNATIONAL J883 Reaffirmed SEP2014 Page 3 of 3_
