1、 WORLDWIDE ENGINEERING STANDARDS Material Specification GMW15812 Thermoplastic Elastomers Polyolefinic, Fully Crosslinked, Exterior Copyright 2011 General Motors Company All Rights Reserved September 2011 Originating Department: North American Engineering Standards Page 1 of 6 1 Scope Note: Nothing
2、in this standard supercedes applicable laws and regulations. Note: In the event of conflict between the English and domestic language, the English language shall take precedence. 1.1 Material Description. This specification covers the properties of black, heat stabilized, weatherable, Thermoplastic
3、Vulcanizates (TPV) containing fully crosslinked Ethylene-Propylene-Diene-Monomer (EPDM) elastomer particles dispersed in a continuous Polypropylene (PP) matrix. These materials can be processed by extrusion, injection molding, and other melt processing techniques. Processing techniques shall be iden
4、tified in material callout. Material types are delineated by hardness values. The types and corresponding hardnesses available are identified in Appendix A, Table A1. 1.2 Symbols. The material abbreviation according to ISO 18064 is: TPV - (EPDM + PP) 1.3 Typical Applications. Typical applications in
5、clude the following: backlight moldings, roof ditch moldings, reveal moldings, air dam deflectors, air inlet panel seals, weatherstrips, gaskets, closeouts, seals and parts where softness and conformity are needed. 1.4 Remarks. Not applicable. 2 References Note: Only the latest approved standards ar
6、e applicable unless otherwise specified. 2.1 External Standards/Specifications. ISO 34-1 ISO 868 ISO 37 ISO 1183 ISO 188 ISO 1431-1 ISO 527 ISO 18064 ISO 812 SAE J1976 ISO 815 SAE J2527 2.2 GM Standards/Specifications. GMW3013 GMW3221 GMW3059 2.3 Additional References. TMC003 Material Safety Data Sh
7、eet 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. 3.1 Requirements on Test Specimens. Tests shall be conducted using the latest issue o
8、f the test methods indicated. Suitable precautions should be taken to ensure that applicable safe limits are not exceeded when conducting test procedures, processes, and/or handling the materials required by this specification. Copyright General Motors Company Provided by IHS under license with Gene
9、ral Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW15812 Copyright 2011 General Motors Company All Rights Reserved September 2011 Page 2 of 6 3.1.1 Tests specimens shall be die cut from fan gated injection molded
10、 plaques having a nominal thickness of 2.0 0.2 mm. Die cut specimens are to be tested with the long axis of the test specimen perpendicular to the direction of flow. Plaque dimensions must be sufficient to permit this. 3.1.2 Tests shall be conducted 40 hours minimum after molding and immediately fol
11、lowing a conditioning period of 24 hours minimum per GMW3221, Code A, unless otherwise specified. All tests shall be performed on unannealed specimens. In addition, tests specified at temperatures below or above 22 3 C shall be conducted at the specified temperature using specimens conditioned at th
12、e specified temperature for 4 hours minimum. 3.1.3 The minimum values specified in the property tables must be met by test specimens in natural, black, or in a standard sampled color if natural or black are not available. For colored grades where other pigment and additive systems (e.g., stabilizer)
13、 are used, the impact values shall not decrease more than 10% from the specified minimum value. 3.2 Compound Properties. See Table 1. A minimum of six lots shall be tested to Table 1. An alpha character shall follow the type designation in the material callout to define the processing technique of t
14、he material. x “E“ shall be used to define extrudable grades x “M“ shall be used to define moldable grades If no alpha character is designated in the material callout, the material can be processed by multiple techniques. The following are also required for full specification approval (the minimum n
15、umber of lots per test required is one): x Youngs Modulus x Poissons Ratio x Coefficient of Linear Thermal Expansion (CLTE) x Stress-Strain Curve at 23 C 3.3 Requirements on Delivery. Important physical, mechanical, and thermal properties that characterize the material are summarized in Table 1. Not
16、e: For each product, the requirements to Table 1 shall be documented by certification statement according to GMW3013. The color shall be specified on drawings, in material specifications and otherwise. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for
17、ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW15812 Copyright 2011 General Motors Company All Rights Reserved September 2011 Page 3 of 6 Table 1: Compound Properties (Black) Note 1: In case of conflict between accelerated and natural
18、 weathering, natural weathering takes precedence. Property Test Method Unit Type 2 Type 4 Type 5 Type 6 Type 7 Type 8 Type 9 Type 10Shore A Hardness ISO 868, 15 second delay Shore A 35 5 55 5 65 5 75 5 80 5 87 5 N/A N/AShore D Hardness ISO 868, 15 second delay Shore D Not applicable Not applicable N
19、ot applicable Not applicable Not applicable Not applicable 40 5 50 5Density ISO 1183 g/cm3 0.89 to 0.99 0.89 to 0.99 0.89 to 1.01 0.94 to 1.02 0.89 to 0.99 0.89 to 0.99 0.93 to 0.99 0.92 to 1.00Tensile Stress at BreakISO 37, Type 1 dumbbell, 500 mm/minuteMPa 2.0 minimum 2.7 minimum 3.9 minimum 5.0 m
20、inimum 5.0 minimum 5.3 minimum 16 minimum Not applicableTensile Stress at BreakISO 527, Type 1BA dumbbell, 50 mm/minuteMPa Not applicable Not applicable Not applicable Not applicable Not applicable Not applicable Not applicable 12 minimumElongation at BreakISO 37, Type 1 dumbbell, 500 mm/minute% 340
21、 minimum 250 minimum 300 minimum 220 minimum 330 minimum 400 minimum 535 minimum Not applicableElongation at BreakISO 527, Type 1BA dumbbell, 50 mm/minute% Not applicable Not applicable Not applicable Not applicable Not applicable Not applicable Not applicable 17 minimumTensile Stress at 100% Elonga
22、tionISO 37, Type 1 dumbbell, 500 mm/minuteMPa 0.6 minimum 0.9 minimum 1.9 minimum 1.0 minimum 2.6 minimum 4.1 minimum 8.5 minimum Not applicableISO 815, Type A,22 h at 70 C Not applicable Not applicable Not applicable 45 maximum 55 maximum 60 maximum 65 maximum 80 maximum70 h at 125 C 50 maximum 50
23、maximum 50 maximum 60 maximum 60 maximum 85 maximum Not applicable Not applicableTear StrengthISO 34-1, Method B, angle die, 500 mm/minutekN/m 6.5 minimum 10 minimum 13 minimum 10 minimum 16 minimum 24 minimum 55 minimum Not applicableTear StrengthISO 34-1, Method B, angle die, 50 mm/minutekN/m Not
24、applicable Not applicable Not applicable Not applicable Not applicable Not applicable Not applicable 90 minimumLow Temperature Brittleness ISO 812, Type B C -56 maximum -56 maximum -56 maximum -56 maximum -56 maximum -50 maximum -48 maximum -28 maximum.Properties After Long Term Heat AgingISO 188, 1
25、000 h at 135 C in an air-circulating oven followed by indicated property testing at 23 C. Test methods are the same as for original mechanical property testing.Change in PropertyTensile Stress % 60 minimumElongation at Break % 50 minimumOzone ResistanceISO 1431-1, Procedure A, 100 pphm, 40 CAccelera
26、ted WeatheringChange in ColorSurface defectsNatural Weathering Note 1Change in ColorSurface defects2 years exposure to natural weathering in Arizona and Florida per SAE J1976, Procedure A E60 retention minimumCompression Set %SAE J2527 with Extended UV filters, 2500 kJ/m2No objectionable defects all
27、owed 3.0 E 3.0No objectionable defects allowed60 retention minimumZero RatingCopyright 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 GMW15812 Copyri
28、ght 2011 General Motors Company All Rights Reserved September 2011 Page 4 of 6 3.4 Performance Requirements. Performance requirements, e.g., flammability, resistance to odor, etc., shall be specified on part drawings or in component specifications. 4 Manufacturing Process Not applicable. 5 Rules and
29、 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 conflict between the English and domestic language, the English language shall take precedence. 5.3 Inspection and Rejec
30、tion. 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 responsible Engineering department prior to commencement of delivery of bulk supplies. A new approval must be recei
31、ved 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 must be completed. It is the responsibility of the supplier to inform the customer in a timely manner, without soli
32、citation, 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 documented by the supplier prior to commencement of delivery of non-conforming bulk supplies. In individual cases
33、, a shorter test can be agreed to between the responsible Engineering department 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 meet
34、ing the requirements of this specification. 5.5 Material Safety Data Sheets/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
35、in compliance with the Globally Harmonized System of Classification and Labeling 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/Saf
36、ety Data Sheet guidance documents where available. 5.6 All materials supplied 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 source
37、s listed in the GM Materials File (MATSPC) under this standard number have been qualified by Engineering as meeting the requirements of this standard. 7 Notes 7.1 Glossary. 7.2 Acronyms, Abbreviations, and Symbols. CLTE Coefficient of Linear Thermal Expansion EPDM Ethylene-Propylene-Diene-Monomer GH
38、S Globally Harmonized System MATSPC Global Repository of GM Approved Materials for Corresponding GM Engineering Standards MSDS Material Safety Data Sheet PP Polypropylene Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networ
39、king permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW15812 Copyright 2011 General Motors Company All Rights Reserved September 2011 Page 5 of 6 SDS Safety Data Sheet TPV Thermoplastic Vulcanizate UV Ultra Violet 8 Coding System This standard shall be referenced in other
40、documents, drawings, etc., as follows: Material per GMW15812P-TPV(EPDM+PP)-Type XY Where: GMW = GM Worldwide Specification 15812 = Sequential Number P = Plastic TPV = Thermoplastic Vulcanizate (EPDM+PP) = Ethylene Propylene Diene Monomer plus Polypropylene Type X = Type 1 to 10 as defined in Table 1
41、 Y = E or M, as defined in Section 3.2 9 Release and Revisions This standard was originated in February 2008. It was first approved by the Global Plastics Team in September 2008. It was first published in September 2008. Issue Publication Date Description (Organization) 1 SEP 2008 Initial publicatio
42、n. 2 SEP 2010 Add Type 10 Requirements. (Plastics GSSLT) 3 SEP 2011 Add Type 2 Requirements. (Plastics GSSLT) Cross Reference of Replaced Material Coding GMW15812P-TPV(EPDM+PP) Type Formerly Identified As: Type 1 Not applicable Type 2 Not applicable Type 3 Not applicable Type 4 GMN7692 (GMNA), QK 00
43、3512 (GME) Type 5 GMP.E/P.029, GMP.E/P.082, GMN3901 (GMNA), QK 003514, QK 003521 (GME), HN2355 Type 21, HN2355 Type 43 (Holden), EDS-M-4612 (GMDAT) Type 6 GMP.E/P.057, GMP.E/P.167 (GMNA), QK 003523 (GME), HN2355 Type 22 (Holden) Type 7 GMN6706, GMP.E/P.120 (GMNA), QK 003523, QK 003524 (GME), HN1914
44、Type 3, HN2355 Type 23, HN2355 Type 44 (Holden) Type 8 GMP.E/P.037, GMP.E/P.144, (GMNA), QK 003525, QK 003526 (GME), HN2355 Type 24, HN2355 Type 57 (Holden) Type 9 GMP.E/P.160 (GMNA), QK 003531, QK 000598 (GME), HN1914 Type 4, HN2355 Type 31 (Holden) Type 10 Not applicable Copyright General Motors C
45、ompany Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW15812 Copyright 2011 General Motors Company All Rights Reserved September 2011 Page 6 of 6 Appendix A Table A1: Typ
46、e Definition Type Hardness Range 1 25 5 Shore A 2 35 5 Shore A 3 45 5 Shore A 4 55 5 Shore A 5 65 5 Shore A 6 75 5 Shore A 7 80 5 Shore A 8 87 5 Shore A 9 40 5 Shore D 10 50 5 Shore D Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
