1、GM DAEWOO Auto & Technology EDS Engineering, GM DAEWOO Auto & Technology Standards POLYPROPYLENE/VULCANIZED EPDM RUBBER BLEND-SHORE A 35 EDS-M-4620 ISSUED DATE: 2004. 03. 26 REVISED DATE: 2008. 01. 02 VERSION: 2 EDS-M-4620POLYPROPYLENE/VULCANIZED EPDM RUBBER BLEND-SHORE A 35 PAGE: 1/3 ISSUED DATE: 2
2、004. 03. 26 REVISED DATE: 2008. 01. 02 VERSION: 2 GM DAEWOO Auto & Technology 1. SCOPE This specification defines general requirements for raw materials of polypropylene/vulcanized EPDM rubber blend-shore A 35 that applied to interior or exterior parts of a vehicle. 2. MATERIAL INDICATION Material i
3、ndication: TPV-(EPDM+PP) Detailed contents shall conform to the indication method of synthetic resin materials for vehicles.(Spec. No: GMW3116) 3. APPLICATION Vulcanized EPDM 60% blend raw materials having better compression set, oil resistance and tensile strength than non-vulcanized EPDM blend. 4.
4、 REQUIREMENTS 4.1. Mechanical properties Type 1 Shore A hardness EDS-T-7403 352 Tensile strength(kg/ ) EDS-T-7511 Test piece(62X ) Test speed(500X /min) 40 Elongation(%) EDS-T-7511 Test piece(62X ) Test speed(500X /min) 500 Tear strength(kg/ ) EDS-T-7521 Test piece(10212.72X , angle 90) Test speed(5
5、00X /min) 10 Compression set(%) EDS-T-7424 Test piece: 12.5X (thickness), 29X (diameter) Test condition: 25% compression ratio: 23168hrs 10% compression ratio: 10070hrs 12 40 4.2. General properties Density(g/R ) EDS-T-7406 0.930.01 Note) All the physical property values above indicate minimum value
6、s except having specified ranges. (But, compression sets indicates maximum value.) EDS-M-4620POLYPROPYLENE/VULCANIZED EPDM RUBBER BLEND-SHORE A 35 PAGE: 2/3 ISSUED DATE: 2004. 03. 26 REVISED DATE: 2008. 01. 02 VERSION: 2 GM DAEWOO Auto & Technology 5. TEST PIECE AND TEST 5.1. Test piece Test pieces
7、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. APPROVAL OF RAW MATERIALS 6.1. Ap
8、proved raw materials Division Approved suppliers Approved raw materials Remark Type 1 Basell 1035A 6.2. Approval and 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
9、assurance procedure for chemical raw materials(Spec. No. EDS-M-0102). 7. AUTOMOTIVE RESTRICTED HAZARDOUS SUBSTANCES Materials and components of parts must comply with GMW3059. 8. OTHERS 8.1. Coding system Material specification of raw materials shall be indicated in drawings as follows. EDS-M-4617 -
10、 0 Requirement property type (clause 4) Material group (none) Material specification number EDS-M-4620POLYPROPYLENE/VULCANIZED EPDM RUBBER BLEND-SHORE A 35 PAGE: 3/3 ISSUED DATE: 2004. 03. 26 REVISED DATE: 2008. 01. 02 VERSION: 2 GM DAEWOO Auto & Technology 9. RELATED STANDARDS EDS-M-0102 Procedures
11、 for approval of chemical raw material and quality control EDS-T-7403 Determination of hardness of elastomeric components EDS-T-7406 Determination of volume and density of elastomers EDS-T-7424 Determination of compression set EDS-T-7511 Test method for the tensile property of plastics EDS-T-7521 Test method for tear strength of elastomer GMW3059 Restricted and reportable substance for parts GMW3116 Recyclability / recoverability guidelines
