1、 WORLDWIDE ENGINEERING STANDARDS Material Specification GMW15187 Polyolefin Alloy - 1700 MPa Flexural Modulus, High Flow Copyright 2012 General Motors Company All Rights Reserved September 2012 Originating Department: North American Engineering Standards Page 1 of 4 1 Scope 1.1 Material Description.
2、 This standard covers the properties of a nominal 1700 MPa flexural modulus polyolefin alloy, high flow, pellet form, black colored injection molding compound. For the purpose of this specification, polyolefin alloy is defined as an alloy of polypropylene plastic and ethylene/propylene (EP) or ethyl
3、ene/propylene diene monomer (EPDM) 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 abbrevi
4、ation according to ISO 11469 is PP+EPDM-M20. 1.3 Typical Applications. Typical applications include the following: fully painted bumper fascias and rocker moldings. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/Specifications.
5、 ASTM D3763 ISO 179/1eA ISO 1133 ISO 3451-1 ASTM E228 ISO 294 ISO 1183 ISO 6603 ASTM E831 ISO 294-1/2/3/4 ISO 1873-2 ISO 11359 ISO 75-1/2/3 ISO 306 ISO 3167 ISO 11469 ISO 178 ISO 527-1/2 2.2 GM Standards/Specifications. GMW3013 GMW3221 GMW14650 GMW14651 GMW3059 GMW14444 2.3 Additional References. TM
6、C003 Material Safety Data Sheet guidance documents (available at ). 3 Requirements Materials approved to this specification shall meet the requirements of GMW3013, General Requirements for Handling of Technical Terms of Delivery for Plastics. Important physical, mechanical and thermal properties tha
7、t characterize the material are summarized in Table 1 of this standard. Note: The requirements to Table 1 shall be documented for self-certification of the product according to GMW3013. The color shall be black if not otherwise specified on drawings, etc. 3.1 Requirements on Test Specimens. Unless o
8、therwise specified, injection molding of test specimens shall be accomplished per ISO 294 with the conditions for injection molding from ISO 1873-2. Test methods and specimen dimensions are also to be in accordance with ISO 1873-2 with the following additions: use ISO 3167, Type A, thickness 4 mm, f
9、or tensile and flexural properties. All tests shall be performed on specimens 40 h minimum after molding and immediately following a conditioning period of 24 h minimum in a controlled atmosphere per GMW3221, Code A, unless otherwise specified. All tests shall be performed on unannealed specimens. C
10、opyright 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 GMW15187 Copyright 2012 General Motors Company All Rights Reserved September 2012 Page 2 of 4
11、 The values specified in Table 1 shall be met by test specimens in natural or black. For colored grades where other pigment and additive systems (e.g., stabilizer) are used, the impact values shall not decrease more than 10% from the specified minimum value. 3.1.1 Chemical Requirements. All parts ma
12、nufactured from molding compounds shall be resistant to the media they contact at their place of use. 3.1.2 Requirements on Materials. See Table 1. A minimum of six lots shall be tested to Table 1. The following are also required for full specification approval (the minimum number of lots per test r
13、equired is one): Poissons Ratio Stress vs. Strain Curve at 23 C Multiaxial Impact Curves 3.2 Performance Requirements. Performance requirements, e.g., flammability, fogging or resistance to odor, shall be specified on part drawings or in component specifications. 3.3 Additional Testing Requirements.
14、 Materials approved to this specification will be required to have basic material properties generated so warp analysis modeling can be conducted. See GM engineer for details. 4 Manufacturing Process Not applicable. 5 Rules and Regulations 5.1 Legal Regulations. All materials must satisfy applicable
15、 laws, rules, regulations and recommendations valid in the country of usage. 5.2 Language. In the event of conflict 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 specif
16、ication shall be tested for conformity with the requirements of this material specification and approved by the responsible 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
17、 manufacture, etc. If not otherwise agreed, all testing and documentation normally required for initial release must be completed. 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
18、and/or processes and to apply for a new release. If not otherwise agreed, all release tests shall be repeated and documented 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 dep
19、artment and the supplier. 5.4 Initial Source Approval. No shipments shall be made by any supplier until representative initial production samples have been approved by the appropriate Materials Engineering department(s) as meeting the requirements of this specification. 5.5 Material Safety Data Shee
20、ts/Safety Data Sheets (MSDS/SDS). For new product submissions, 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 L
21、abeling of Chemicals (GHS) requirements or other country-specific 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. 5.6 All materials supp
22、lied to this standard must comply with the requirements of GMW3059, Restricted and Reportable Substances for Parts. 6 Approved Sources Engineering qualifications of an approved source are required for this standard. Only sources listed in the GM Materials File, MATSPC, under this standard number hav
23、e been qualified by Engineering as meeting the requirements of this standard. 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 GMW15187 Copyr
24、ight 2012 General Motors Company All Rights Reserved September 2012 Page 3 of 4 Table 1: Compound Properties (Black or Natural) Properties Standard Unit Values Mineral Filler Content (Ash) ISO 3451-1, Method A at +600 C % by mass 14 to 24 Density ISO 1183, Method A g/cm 1.00 to 1.04 Melt Flow Rate (
25、MFR) 230/2.16 ISO 1133 g/10 minutes 19 to 27 Melt Volume-Flow Rate (MVR) 230/2.16 ISO 1133 cm/10 minutes 22.1 to 31.4 Flexural Modulus ISO 178, 80 mm x 10 mm x 4 mm specimen, 2 mm/minute test speed, 64 mm support span MPa 1550 to 1850 Tensile Modulus ISO 527-1/2, specimen 1A, 1 mm/minute test speed
26、MPa Report Results Tensile Stress at Yield ISO 527-1/2, specimen 1A, 50 mm/minute test speed MPa 13 Multiaxial Impact Strength at +23 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 ASTM D3763, specimen C, 2.2 m/
27、s impact velocity J at maximum load 15 All failures must be ductile Multiaxial Impact Strength at +23 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 Report Energy at Maximum Force and Type of Failure
28、 Multiaxial Impact Strength at -30 C (or lowest temperature 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 Report Energy at Maximum Force and Type of Fai
29、lure; Report Test Temperature Notched Charpy Impact at +23 C ISO 179/1eA kJ/m2 50 Notched Charpy Impact at -30 C ISO 179/1eA kJ/m2 5 Vicat Softening Temperature (VST)/A/50 ISO 306 C +120 Heat Deflection Temperature, Method A ISO 75-1, ISO 75-2, ISO 75-3 C +50 Coefficient of Linear Thermal Expansion
30、(CLTE), 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 294-1, ISO 294-2, ISO 294-3, ISO 294-4, plaque size 101.6 mm x 152.0 mm x 3.2 mm (4 in x 6 in x 0.125 in). Any deviations t
31、o plaque size must be agreed upon with GM Engineering. % 0.525 to 0.675 Shrink, after bake, 1 h at 82 C ISO 294-1, ISO 294-2, ISO 294-3, ISO 294-4, plaque size 101.6 mm x 152.0 mm x 3.2 mm (4 in x 6 in x 0.125 in). Any deviations to plaque size must be agreed upon with GM Engineering. % 0.625 to 0.7
32、75 Shrink, after bake, 1 h at 121 C ISO 294-1, ISO 294-2, ISO 294-3, ISO 294-4, plaque size 101.6 x 152.0 x 3.2 mm (4 in x 6 in x 0.125 in). Any deviations to plaque size must be agreed upon with GM Engineering. % 0.725 to 0.875 Copyright General Motors Company Provided by IHS under license with Gen
33、eral Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW15187 Copyright 2012 General Motors Company All Rights Reserved September 2012 Page 4 of 4 7 Notes 7.1 Glossary. MATSPC: Global repository of GM approved materi
34、als for corresponding GM Engineering Standards. 7.2 Acronyms, Abbreviations, and Symbols. APOPS GM Approved Paint on Parts Systems CLTE Coefficient of Linear Thermal Expansion EP Ethylene/propylene EPDM Ethylene/propylene diene monomer GHS Globally Harmonized System of Classification and Labeling of
35、 Chemicals MFR Melt Flow Rate MPa Megapascals MSDS Material Safety Data Sheet MVR Melt Volume Flow Rate SDS Safety Data Sheet VST Vicat Softening Temperature 8 Coding System This standard shall be referenced in other documents, drawings, etc., as follows: Material per GMW15187 9 Release and Revision
36、s This standard was originated in February 2006. It was first approved by Global Materials Engineering in March 2007. It was first published in November 2007. Issue Publication Date Description (Organization) 1 NOV 2007 Initial publication. 2 SEP 2012 Five year refresh of standard. (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-,-,-
