1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2010 01 25 N-STATUS No replacement named J. Crist, NA 2006 05 16 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.8, 3.9 use 2 fluids. ENGINEERING MATERIAL SPECIFICATIONWSK-M4D858-A2Printed copies are uncontrolled Copyright 2010, Ford Global Tec
2、hnologies, LLC Page 4 of 6 3.7 WEATHERING RESISTANCE After exposure in accordance with 3.7.1, 3.7.2 and 3.7.3, the material shall show no color change in excess of specified Gray Scale rating (AATCC Evaluation Procedure 1/ISO 105-A02). In addition, there shall be no cracking, crazing or other deteri
3、oration. A slight loss of gloss or chalking will be allowed provided an acceptable appearance can be achieved by washing and/or polishing with Ford car polish (auto wax) after the outdoor exposure, at permission of the affected Product Development Materials Activity. All initial approvals will be ba
4、sed on the preliminary Weatherometer exposure, pending Florida and Arizona exposure results for final approval. 3.7.1 Xenon Arc Weatherometer Rating 4 (SAE J1960, 660 kJ/m2exposure minimum, specimen size: 150 x 100 mm minimum, 3.2 +/- 0.2 mm thick, molded in smooth polished mold) 3.7.2 12 months Flo
5、rida Rating 4 12 months Arizona (NAAO only) (SAE J1976, 5 south, direct weathering inland, specimen size: 150 x 100 mm, minimum, 3.2 +/- 0.2 mm thick, molded in smooth polished mold) 3.7.3 24 months Florida Rating 3 - 4 24 months Arizona (NAAO only) (SAE J1976, 5 south, direct weathering inland, spe
6、cimen size: 150 x 100 mm, minimum, 3.2 +/- 0.2 mm thick, molded in smooth polished mold) 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 10 15-5/ C (ASTM E 2
7、28 or TMA, temperature range -40 to +100 C) 5.2 MOLD SHRINKAGE (ISO 2577, approx. 150 x 100 x 3.2 +/- 0.2 mm injection molded specimen) ENGINEERING MATERIAL SPECIFICATIONWSK-M4D858-A2Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 5 of 6 5.2.1 Molding Shrinkage . A
8、fter 48 h at 23 +/- 2 C 0.7 - 1.0% 5.2.2 Post Shrinkage (Separate specimens required for each test) . After 48 h at 80 C 0.30% . After 30 min at 120 C 1.1% 5.3 MELT VOLUME RATE (ISO 1133, 250 C, 5 kg) 15 - 25 cm/ 10 minutes Note: The material shall be dried for 2 h minimum at 120 - 125 C in a mechanical convection oven immediately preceding the test. 5.4 RECYCLING CODE PC+PBT ENGINEERING MATERIAL SPECIFICATIONWSK-M4D858-A2Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 6 of 6
