1、 WORLDWIDE ENGINEERING STANDARDS Material Specification GMW15186 Polyolefin Alloy - Weather Resistant, 1000 MPa Flexural Modulus, High Flow Copyright 2013 General Motors Company All Rights Reserved August 2013 Page 1 of 6 1 Scope 1.1 Material Description. This specification covers the properties of
2、a weather resistant, 1000 MPa nominal flexural modulus polyolefin alloy, high flow, pellet form, injection molding compound. For the purpose of this specification, polyolefin alloy is defined as an alloy of polypropylene plastic and Ethylene/Propylene (EP) or Ethylene/Propylene-Diene Monomer (EPDM)
3、rubber. 1.1.1 Additional Characteristics. Materials certified to this material specification may have additional characteristics, e.g., paintable, elastomer modified, etc. Possible additional characteristics are defined in GMW3013. 1.2 Symbols. The material abbreviation according to ISO 11469 is PP+
4、EPDM-M1313 Multiaxial Impact Strength at 23 C 2 C ASTM D3763, specimen C, 2.2 m/s impact velocity J at maximum load 15 All failures must be ductile Multiaxial Impact Strength at -30 C 2 C ASTM D3763, specimen C, 2.2 m/s impact velocity J at maximum load 15 All failures must be ductile Multiaxial Imp
5、act Strength at +23 C 5 C ISO 6603-2/40/20/C/4.4. Sample to be either square 60 mm x 60 mm minimum, or circle 60 mm diameter minimum. Sample thickness to be 2 mm 0.1 mm. J at maximum load Report Energy at Maximum Force and Type of Failure. Multiaxial Impact Strength at -30 C 3 C (or lowest temperatu
6、re where only type YD or YS failures are observed) ISO 6603-2/40/20/C/4.4. Sample to be either square 60 mm x 60 mm minimum, or circle 60 mm diameter minimum. Sample thickness to be 2 mm 0.1 mm. J at maximum load Report Energy at Maximum Force and Type of Failure; Report Test Temp. Notched Charpy Im
7、pact at 23 C ISO 179/1eA kJ/m2 Report Results Notched Charpy Impact at -30 C ISO 179/1eA kJ/m2 Report Results Vicat Softening Temperature (VST)/A/50 ISO 306 C Report Results Heat Deflection Temperature (HDT) Method A ISO 75-1, ISO 75-2, ISO 75-3 C +50 Coefficient of Linear Thermal Expansion (CLTE),
8、longitudinal, 23 C to 80 C for ISO 11359, -30 C to 100 C for ASTM E831 and ASTM E228 ISO 11359 or ASTM E831 or ASTM E228 1/K 55 x 10-6 Shrink, 48 h after molding ISO 294, plaque size (4 in x 6 in x 0.125 in) % 0.525 to 0.675 Note 2 Shrink, After Bake, 1 h at 82 C ISO 294, plaque size (4 in x 6 in x
9、0.125 in) % 0.625 to 0.775 Note 2 Shrink, After Bake, 1 h at 121 C ISO 294, plaque size (4 in x 6 in x 0.125 in) % 0.725 to 0.875 Note 2 Note 1: Can vary by region as long as shrink is not affected. Note 2: Determined on test plaques and manufactured at defined conditions. Not tooling specification
10、data. YD: Yielding (zero slope at maximum force) followed by deep drawing. YS: Yielding (zero slope at maximum force) followed by (at least partially) stable cracking. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networkin
11、g permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW15186 Copyright 2013 General Motors Company All Rights Reserved August 2013 Page 4 of 6 Table 2: Compound Properties (Integrally Colored) Properties Standard Unit Value Multiaxial Impact Strength at 23 C 2 C ASTM D3763, s
12、pecimen C, 2.2 m/s impact velocity J at maximum load 15 All failures must be ductile Multiaxial Impact Strength at -30 C 2 C ASTM D3763, specimen C, 2.2 m/s impact velocity J at maximum load 15 All failures must be ductile Multiaxial Impact Strength at 23 C 5 C ISO 6603-2/40/20/C/4.4. Sample to be e
13、ither square 60 mm x 60 mm minimum, or circle 60 mm diameter minimum. Sample thickness to be 2 mm 0.1 mm. J at maximum load 15 All failures must be ductile Multiaxial Impact Strength at -30 C 3 C (or lowest temperature where only type YD or YS failures are observed) ISO 6603-2/40/20/C/4.4. Sample to
14、 be either square 60 mm x 60 mm minimum, or circle 60 mm diameter minimum. Sample thickness to be 2 mm 0.1 mm. J at maximum load Report Energy at Maximum Force and Type of Failure Report Test Temp. Weather Resistance Note 1, Note 2 Color Change Surface Defects 2 years exposure to direct weather in A
15、rizona and Florida per SAE J1976, Procedure A. Measure color as defined in Note 2 following this table. E 3.0 maximum No objectionable defects allowed Accelerated Weather Resistance Note 3 Color Change Surface Defects Test to GMW14650 (Weather-Ometer Resistance) Class 3. Measure color as defined in
16、Note 1 following this table. E 3.0 maximum No objectionable defects allowed Note 1: For integrally colored compounds, the color of each test specimen shall be measured per SAE J1545, CIELAB color space, 10 degrees observer, illuminant D65, specular included, sphere geometry, before and after exposur
17、es. In case of conflict between accelerated and natural weathering, natural weathering takes precedent. Prior to making measurements and observations on weathered specimens, wash the specimens with a solution consisting of 2 g No. 7 Car Wash Concentrate (distributed by Armor All Products, Aliso Viej
18、o, CA 92656) and 1 L deionized water 22 C 3 C. Use a soft sponge, saturated with the solution, and scrub the samples with a firm action. Note 2: Alternate natural weathering sites may be used according to GMW16847. If alternate natural weathering sites are to be used, obtain agreement from the regio
19、nal GM Engineering group prior to sending test samples out for exposure. Note 3: In case of conflict between accelerated weathering and natural weathering, natural weathering results take precedence. YD: Yielding (zero slope at maximum force) followed by deep drawing. YS: Yielding (zero slope at max
20、imum force) followed by (at least partially) stable cracking. 4 Manufacturing Process Not applicable. 5 Rules and Regulations 5.1 Legal Regulations. All materials must satisfy applicable laws, rules, regulations and recommendations valid in the country of usage. 5.2 Language. In the event of conflic
21、t between the English and domestic language, the English language shall take precedence. 5.3 Inspection and Rejection. Samples of components or materials released to a GM material specification shall be tested for conformity with the requirements of this material specification and approved by the re
22、sponsible Engineering department prior to commencement of delivery of bulk supplies. A new approval must be received for any changes, e.g., properties, manufacturing process, location of manufacture, etc. If not otherwise agreed, all testing and documentation normally required for initial release mu
23、st be completed. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW15186 Copyright 2013 General Motors Company All Rights Reserved August 2
24、013 Page 5 of 6 It is the responsibility of the supplier to inform the customer in a timely manner, without solicitation, and to include documentation of all modifications of materials and/or processes and to apply for a new release. If not otherwise agreed, all release tests shall be repeated and d
25、ocumented by the supplier prior to commencement of delivery of non-conforming bulk supplies. In individual cases, a shorter test can be agreed to between the responsible Engineering department and the supplier. 5.4 Material Safety Data Sheets/Safety Data Sheets (MSDS/SDS). For new product submission
26、s, or when a change in chemical composition of an existing product has occurred, a complete copy of the Material Safety Data Sheet/Safety Data Sheet must be submitted in compliance with the Globally Harmonized System of Classification and Labeling of Chemicals (GHS) requirements or other country-spe
27、cific MSDS/SDS requirements. In addition, product MSDS/SDS submissions must be in compliance with specific country General Motors TMC003 Material Safety Data Sheet/Safety Data Sheet guidance documents where available. 5.5 All materials supplied to this standard must comply with the requirements of G
28、MW3059, Restricted and Reportable Substances for Parts. 6 Approved Sources Materials supplied to this specification must be approved by General Motors. A list of approved materials can be found in MATSPC. This GM Material File is provided to third parties to reduce redundant testing of materials. If
29、 approved material already listed is used, the part supplier can use GM Material File reference for Production Part Approval Process (PPAP) material approval. If the decision is made to use a not yet approved material, contact GM Materials Engineering for details on the approval process. The materia
30、l approval process must be completed prior to PPAP start date of the part supplied to General Motors. 7 Notes 7.1 Glossary. MATSPC: Global repository of GM approved materials for corresponding GM Engineering Standards. YD: Yielding (zero slope at maximum force) followed by deep drawing. YS: Yielding
31、 (zero slope at maximum force) followed by (at least partially) stable cracking. 7.2 Acronyms, Abbreviations, and Symbols. CLTE Coefficient of Linear Thermal Expansion EP Ethylene/Propylene EPDM Ethylene/Propylene-Diene Monomer GHS Globally Harmonized System of Classification and Labeling of Chemica
32、ls HDT Heat Deflection Temperature MFR Melt Flow Rate MSDS Material Safety Data Sheet MVR Melt Volume Flow Rate PPAP Production Part Approval Process SDS Safety Data Sheet TPO Thermoplastic Polyolefin VST Vicat Softening Temperature 8 Coding System This standard shall be referenced in other document
33、s, drawings, etc., as follows: Material per GMW15186 Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW15186 Copyright 2013 General Motors
34、Company All Rights Reserved August 2013 Page 6 of 6 9 Release and Revisions This standard was originated in February 2006. It was first approved by the Global Plastics Team in July 2008. It was first published in July 2008. Issue Publication Date Description (Organization) 1 JUL 2008 Initial publica
35、tion. 2 AUG 2013 Five year refresh of standard. Minor updates to add clarification. (Plastics Global Subsystem Leadership Team) Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
