1、GM DAEWOO Auto & Technology EDSE ngineering,GM DAEWOO Auto & Technology.Standards 45% GLASS FIBER MAT REINFORCED POLYPROPYLENE EDS-M-4255 ISSUED DATE: 1995. 07. 12 REVISEDDATE: 2003. 04. 21 VERSION: 3EDS-M-4255 45% GLASS FIBER MAT REINFORCED POLYPROPYLENE PAGE: 1/3 ISSUED DATE: 1995. 07. 12 REVISED
2、DATE: 2003. 04. 21 VERSION: 3 GM DAEWOO Auto & Technology 1. SCOPE This specification defines general requirements for raw materials of 45% glass fiber mat reinforced polypropylene applied to interior and exterior parts of a vehicle. 2. MATERIAL INDICATION Material indication: PP-GM45 Detailed conte
3、nts shall conform to the indication method of synthetic resin materials for vehicles. (Spec. No: EDS- M-0101) 3. APPLICATION Glass fiber mat reinforced raw materials which have excellent heat resistance, rigidity, impact strength and dimensional stability and use PP-Homopolymer as base resin. Ex) Bu
4、mper Impact Beam 4. REQUIREMENTS 4.1. Mechanical properties Type 1 Type 2 Rockwell hardness EDS-T-7517 R scale - - Tensile strength (kg/cm 2 ) EDS-T-7511 Test piece (13 3mm) Test speed (5mm/min) 2,300 2,600 Elongation(%) EDS-T-7511 Test piece (13 3mm) Test speed (5mm/min) 2 2 Flexural strength (kg/c
5、m 2 ) EDS-T-7518 Test piece (127 12.7 6.4mm) Test speed (2.8mm/min) 2,400 2,700 Flexural modulus (kg/cm 2 ) EDS-T-7510 Test piece (127 12.7 6.4mm) Test speed (2.8mm/min) 90,000 94,000 Impact strength, IZOD (kg cm/cm) EDS-T-7514 Test piece (63.5 12.7 3.2mm) Room temperature -30 NB - NB - 4.2. Thermal
6、 properties Heat deflection temperature( ) EDS-T-7520 Test piece (127 12.7 6.4mm) 18.6 kg/cm 2 160 160EDS-M-4255 45% GLASS FIBER MAT REINFORCED POLYPROPYLENE PAGE: 2/3 ISSUED DATE: 1995. 07. 12 REVISED DATE: 2003. 04. 21 VERSION: 3 GM DAEWOO Auto & Technology 4.3. General properties Type 1 Type 2 De
7、nsity(g/cm 3 ) EDS-T-7406 1.27 1.27 Glass fiber contents (%) EDS-T-7301 45 45 Note) All the mechanical, thermal and general property values above indicate minimum values except density. 4.4. Test pieces for the mechanical and thermal properties shall be prepared on parallel direction to the glass fi
8、ber mat laminating. 5. TEST PIECE AND TEST 5.1. Test piece Test pieces shall be prepared with compression molding. Unless otherwise specified in the requirements of clause 4, they shall be conditioned at 23 5K and a relative humidity of 50% for 24 hours or more. 5.2. Test Tests shall be performed at
9、 23 5K and a relative humidity of 50%. 6. APPROVAL OF RAW MATERIALS 6.1. Approved raw materials Division Approved suppliers Approved raw materials Remarks Type 1 Hanwha chemical GMT UD 45 UD Grade Type 2 Hanwha chemical GMT UD 45HI UD Grade Note) UD : Unidirectional glass fiber mat 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 chemical raw materials(Spec. No. EDS-M- 0102). 7. AUTOMOTIVE RESTRICTED HAZARDOUS SUBSTANCES
11、 Materials and components of parts must comply with EDS-A-0101.EDS-M-4255 45% GLASS FIBER MAT REINFORCED POLYPROPYLENE PAGE: 3/3 ISSUED DATE: 1995. 07. 12 REVISED DATE: 2003. 04. 21 VERSION: 3 GM DAEWOO Auto & Technology 8. OTHERS 8.1. Coding system Material specification of raw materials shall be i
12、ndicated in drawings as follows. EDS-M-4255-0 Required property type(clause 4) Material group(none) Material specification number 9. RELATED STANDARDS EDS-A-0101 Automotive restricted hazardous substances for parts EDS-M-0101 Material coding system of automotive plastic parts EDS-M-0102 Procedures f
13、or approval of chemical raw material and quality control EDS-T-7301 Test method for determining the residue on ignition (ash) of polymeric materials EDS-T-7406 Determination of volume and density of elastomers EDS-T-7510 Testing of plastics determination of the modulus of elasticity by tensile, comp
14、ression 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
