1、GM DAEWOO Auto & Technology EDS Engineering, GM DAEWOO Auto & Technology. Standards POLYSTYRENE EDS-M-4306 ISSUED DATE: 1995. 01. 10 REVISED DATE: 2003. 05. 14 VERSION: 3 EDS-M-4306POLYSTYRENE PAGE: 1/3 ISSUED DATE: 1995. 01. 10 REVISED DATE: 2003. 05. 14 VERSION: 3 GM DAEWOO Auto & Technology 1. SC
2、OPE This specification defines general requirements for raw materials of Polystyrene applied to interior and exterior parts of a vehicle. 2. MATERIAL INDICATION Material indication: PS Detailed contents shall conform to the indication method of synthetic resin materials for vehicles.(Spec. No: EDS-M
3、-0101) 3. APPLICATION 3.1. Group 1: General use raw material excellent dielectrical property and molding ability. 3.2. Group 2: Heat resistance raw materials having excellent dielectrical property and molding ability 3.3. Group 3: Impact modified raw materials having excellent dielectrical property
4、and molding ability. 3.4. Group 4: Raw materials of heat resistance and impact resistance having dielectrical property and molding ability. 4. REQUIREMENTS 4.1. Mechanical properties Group 3 Type 1 Group 4Type 1 Rockwell hardness EDS-T-7517 R Scale 45 65 Tensile strength(kg/ ) EDS-T-7511 Test piece
5、(133mm) Test speed (50mm/min) 240 380 Elongation(%) EDS-T-7511 Test piece (133mm) Test speed (50mm/min) 40 20 Flexural strength(kg/ ) EDS-T-7518 Test piece (12712.76.4mm) Test speed (28mm/min) 340 600 EDS-M-4306POLYSTYRENE PAGE: 2/3 ISSUED DATE: 1995. 01. 10 REVISED DATE: 2003. 05. 14 VERSION: 3 GM
6、DAEWOO Auto & Technology Group 3 Type 1 Group 4Type 1 Flexural modulus(kg/ ) EDS-T-7510 Test piece (12712.76.4mm) Test speed (28mm/min) 16,700 20,700 Impact strength, IZOD (kg cm/cm) EDS-T-7514 Test piece (63.512.73.2mm) Room temperature -30 10 6 9 4 4.2. Thermal properties Heat deflection temperatu
7、re () EDS-T-7520 Test piece (12712.76.4mm) 18.6kg/cm280 85 4.3. General properties Density (g/cm3) EDS-T-7406 1.07 1.07 Melt flow index (g/10 min) EDS-T-7516 200, 5kg 3 3 Note) All the mechanical, thermal and general property values above indicate minimum values except density. 5. TEST PIECE AND TES
8、T 5.1. Test piece Test pieces shall be prepared with injection molding. Unless otherwise specified in the requirements of clause 4, they shall be conditioned at 235K and a relative humidity of 50% for 24 hours or more. 5.2. Test Tests shall be performed at 235K and a relative humidity of 50%. 6. APP
9、ROVAL OF RAW MATERIALS 6.1. Approved raw materials Division Approved suppliers Approved raw materials Remark Group 3 Type 1 BASF 476L Group 4 Type 1 BASF 456M EDS-M-4306POLYSTYRENE PAGE: 3/3 ISSUED DATE: 1995. 01. 10 REVISED DATE: 2003. 05. 14 VERSION: 3 GM DAEWOO Auto & Technology 6.2. Approval and
10、 quality assurance procedure All raw materials shall be approved and regularly inspected for its quality prior to and during mass production delivery according to approval and quality assurance procedure for plastic raw materials (Spec. No. EDS-M-0102). 7. AUTOMOTIVE RESTRICTED HAZARDOUS SUBSTANCES
11、Materials and components of parts must comply with EDS-A-0101. 8. OTHERS 8.1. Coding system Material specification of raw materials shall be indicated in drawings as follows. EDS-M- 4306 - Required property type (clause 4) Material group (clause 3) Material specification number 9. RELATED STANDARDS
12、EDS-A-0101 Automotive restricted hazardous substances for parts EDS-M-0101 Material coding system of automotive plastic parts EDS-M-0102 Procedures for approval of chemical raw material and quality control EDS-T-7406 Determination of volume and density of elastomers EDS-T-7510 Testing of plastics de
13、termination of the modulus of elasticity by tensile, compression and flexural test EDS-T-7511 Test method for the tensile property of plastics EDS-T-7514 Test method for determining the flexural strength of plastics EDS-T-7516 The test method for the melt flow index of thermoplastics EDS-T-7517 The test method for Rockwell hardness of plastics EDS-T-7518 The method for the flexural strength of plastics EDS-T-7520 Test for deflection temperature of plastics under load
