1、GM DAEWOO Auto & Technology EDS Engineering, GM DAEWOO Auto & Technology Standards TEST OF STAIN BEHAVIOR OF MOLD HEADLINING BY DRY DUST Do Not Use on New Programs. Being Replaced by GMW14512 EDS-T-7628 ISSUED DATE: 1992. 01. 11 REVISED DATE: 2008. 10. 15 VERSION: 4 (Superceded) EDS-T-7628TEST OF ST
2、AIN BEHAVIOR OF MOLD HEADLINING BY DRY DUST PAGE: 1/3 ISSUED DATE: 1992. 01. 11 REVISED DATE: 2008. 10. 15 VERSION: 4 GM DAEWOO Auto & Technology Note: This standard may be applied only for current project (incl. T255 Program). It is Superceded for all future projects and replaced by GMW14512. 1. PU
3、RPOSE This test method shall be used to determine the stain behavior when the dry dust is applied to the automotive headlining. 2. SCOPE This standard specifies the method which determines the dust absorption capacity of mold headlining. For doing so, apply the dry dust to the automotive headlining
4、and make it absorbed. And then, suck the absorbed dust using the suction. The sucked surface shall be evaluated in comparison to an unfold test piece. 3. TEST PIECES AND NUMBER OF TEST PIECES The circular test piece with a diameter of (2103)mm shall be taken from the flat area of mold headlining as
5、follows. 3.1. For initial sample approval and arbitration purpose : at least 3 3.2. For routine quality control purpose : at least 1 4. CONDITIONING The test shall be carried out in the as received condition without a special conditioning. 5. APPARATUS 5.1. Testing device(see fig.1) 5.1.1. The testi
6、ng device consists of a pot, which is equipped with a air circulating device(rate of air flow : 1m3/min). (blower type : WE 3140 TR Ing. E&F. Engel GmbH) 5.1.2. The pot has a contact surface for supporting the test piece on the upper edge. The contact surface shall have at least the size of test pie
7、ce. 5.1.3. The upper opening of pot is covered with a lid, to which a vacuum pump is connected. 5.1.4. The pressure difference of top side of test piece to the under side shall amount to 5 to 10KPa. 5.2. Vacuum pump 5.3. Commercial dust exhauster 5.4. Dry dust (AG. 5090 LEVERKUSEN of the company BAY
8、ER) EDS-T-7628TEST OF STAIN BEHAVIOR OF MOLD HEADLINING BY DRY DUST PAGE: 2/3 ISSUED DATE: 1992. 01. 11 REVISED DATE: 2008. 10. 15 VERSION: 4 GM DAEWOO Auto & Technology 5.5. Grey scale Fig. 1. Testing machine 6. PROCEDURE 6.1. In the pot 3g dry dust is charged. The test piece shall be placed on the
9、 pot with its outside contacted. 6.2. After the blower and vacuum pump are put into operation, the test piece shall be exposed to air current at +23 for 1h. 6.3. The test piece shall be removed from the pot and the half of fouled test piece surface is sucked off with a dust exhauster. 6.4. Such suct
10、ion shall be continuous till any visible change does not occur. 6.5. The sucked surface shall be evaluated. 6.6. If the mold headlining is laminated with film, the surface shall be cleaned additionally with a clean, wet cloth before the evaluation. 7. EVALUATION For the evaluation of fouling the suc
11、ked surface is evaluated with grey scale in comparison to an unfold test piece. The evaluation shall be performed far from the edge at least 10mm. EDS-T-7628TEST OF STAIN BEHAVIOR OF MOLD HEADLINING BY DRY DUST PAGE: 3/3 ISSUED DATE: 1992. 01. 11 REVISED DATE: 2008. 10. 15 VERSION: 4 GM DAEWOO Auto
12、& Technology 8. EXPRESSION OF RESULT The result of strain test of mold headlining shall be expressed according to the requirement specified in clause 7. The details for test method shall be additionally recorded. 9. CODING SYSTEM On drawings, material specifications, the stain behavior of mold headlining shall be expressed as follows. Stain behavior EDS-T-7628 RATING 4 min Requirement Test method Designation 10. RELATED STANDARDS EDS-T-7507 Test method for conditioning of plastic materials, textiles, fiberboards, wood etc
