1、 WORLDWIDE ENGINEERING STANDARDS Material Specification GMW16088 Thermoplastic Elastomers - Chlorinated Ethylene Alloy, Exterior Copyright 2012 General Motors Company All Rights Reserved March 2012 Originating Department: North American Engineering Standards Page 1 of 5 1 Scope 1.1 Material Descript
2、ion. This specification covers the properties of black, heat stabilized, weatherable, chlorinated ethylene thermoplastic elastomer alloys. These materials can be processed by extrusion or injection molding. Material types are delineated by hardness values. The types and corresponding hardnesses avai
3、lable are identified in Table A1. 1.2 Symbols. The material abbreviation according to ISO 18064 is TPZ-(NBR+PVC). 1.3 Typical Applications. Typical applications include the following: outer belt moldings, reveal moldings, and window laces. 2 References Note: Only the latest approved standards are ap
4、plicable unless otherwise specified. 2.1 External Standards/Specifications. ISO 34-1 ISO 812 ISO 1183 SAE J1976 ISO 188 ISO 815 ISO 1431-1 SAE J2527 ISO 527 ISO 868 ISO 18064 2.2 GM Standards/Specifications. GMW3013 GMW3059 GMW3221 2.3 Additional References. TMC003 Material Safety Data Sheet guidanc
5、e 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 Delivery. Important physical, mechanical, and thermal properties that charac
6、terize the material are summarized in Table 1. Note: 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. 3.2 Requirements on Test Specimens. Tests shall
7、be conducted using the latest issue of 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. 3.2.1 Tests specimens shall be die
8、cut from fan gated injection molded plaques having a nominal thickness of 2.0 mm 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. 3.2.2 Tests shall be conducted 40 h minimum
9、 after molding and immediately following a conditioning period of 24 h 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 C 3 C shall be conducted at the specified temperature usi
10、ng specimens conditioned at the specified temperature for 4 h minimum. 3.2.3 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 Copyright
11、 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 GMW16088 Copyright 2012 General Motors Company All Rights Reserved March 2012 Page 2 of 5 additive sy
12、stems (e.g., stabilizer) are used, the impact values shall not decrease more than 10% from the specified minimum value. 3.3 Compound Properties. 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
13、per test required is one): Youngs Modulus Poissons Ratio Coefficient of Linear Thermal Expansion (CLTE) Stress-Strain Curve at 23 C Table 1: Compound Properties (Black) Property Test Method Unit Type 1 Type 2 Type 3 Type 4 Shore A Hardness ISO 868, 15 s delay Shore A 60 5 70 5 80 5 50 5 Density ISO
14、1183 g/cm 1.10 to 1.20 1.11 to 1.25 1.14 to 1.32 1.10 to 1.20 Tensile Stress at Break ISO 527, Type 1BA dumbbell, 500 mm/minute MPa 6.0 minimum 7.0 minimum 9.0 minimum 5.0 minimum Elongation at Break ISO 527, Type 1BA dumbbell, 500 mm/minute % 250 minimum 240 minimum 200 minimum 400 minimum Tensile
15、Stress at 100% Elongation ISO 527, Type 1BA dumbbell, 500 mm/minute MPa 1.5 minimum 1.5 minimum 1.5 minimum 1.5 minimum Compression Set ISO 815, Type A, 22 h at 70 C % 80 maximum 90 maximum 95 maximum 95 maximum Tear Strength ISO 34-1, Method B, angle die, 500 mm/minute kN/m 18 minimum 18 minimum 25
16、 minimum 22 minimum Low Temperature Brittleness ISO 812, Type B C -60 maximum -50 maximum -40 maximum -65 maximum Properties After Heat Aging ISO 188, 1000 h at 100 C in an air-circulating oven, followed by indicated property testing at 23 C. Test methods are the same as for original mechanical prop
17、erty testing. Change In Property No objectionable color change or tackiness 70 retention minimum 70 retention minimum Tensile Strength Elongation at Break % % Ozone Resistance ISO 1431-1, Procedure A, 100 pphm, 40 C Zero Rating Accelerated Weathering SAE J2527 with extended UV filters to 2500 kJ/m2
18、E 3.0 No objectionable defects allowed Change in Color Surface Defects Solar Weathering Note 1 2 years exposure to natural weathering in Arizona and Florida per SAE J1976, Procedure A Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduct
19、ion or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16088 Copyright 2012 General Motors Company All Rights Reserved March 2012 Page 3 of 5 Property Test Method Unit Type 1 Type 2 Type 3 Type 4 Color Change Surface Defects E 3.0 No objectionable defects allo
20、wed Note 1: In case of conflict between accelerated weathering and natural weathering, natural weathering takes precedence. 4 Manufacturing Process Not applicable. 5 Rules and Regulations 5.1 Legal Regulations. All materials must satisfy applicable laws, rules, regulations and recommendations valid
21、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 specification shall be tested for conformity with the requ
22、irements 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 manufacture, etc. If not otherwise agreed, all test
23、ing 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 and/or processes and to apply for a new release. If
24、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 department and the supplier. 5.4 Initial Source Approva
25、l. 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 Sheets/Safety Data Sheets (MSDS/SDS). For new product su
26、bmissions, 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 cou
27、ntry-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 supplied to this standard must comply with the requireme
28、nts 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 have been qualified by Engineering as meeting the requi
29、rements of this standard. 7 Notes 7.1 Glossary. MATSPC: Global repository of GM approved materials for corresponding GM Engineering Standards. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without licen
30、se from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16088 Copyright 2012 General Motors Company All Rights Reserved March 2012 Page 4 of 5 7.2 Acronyms, Abbreviations, and Symbols. CLTE Coefficient of Linear Thermal Expansion GHS Globally Harmonized System of Classification and Labeling of Chemica
31、ls MSDS Material Safety Data Sheet NBR Acrylonitrile-Butadiene Rubber pphm parts per hundred million PVC Polyvinyl Chloride SDS Safety Data Sheet UV Ultraviolet 8 Coding System This standard shall be referenced in other documents, drawings, etc., as follows: Material per GMW16088P-TPZ(NBR+PVC)Type X
32、 Where: GMW = GM Worldwide Specification 16088 = Sequential Number P = Plastic TPZ = Miscellaneous Thermoplastic Elastomer NBR+PVC = Acrylonitrile-Butadiene Rubber plus Polyvinyl Chloride Type X = Type 1 to 4 as defined in Table 1 9 Release and Revisions This standard was originated in September 200
33、8. It was first approved by the Global Plastics Team in November 2008. It was first published in March 2009. Issue Publication Date Description (Organization) 1 MAR 2009 Initial publication. 2 MAR 2012 Added Type 4 requirements. (Plastics Global Subsystem Leadership Team) Cross Reference of Replaced
34、 Specifications GMW16088P-TPZ(NBR+PVC) Type Specification Replaced 1 GMP.TECEA.001 2 GMP.TECEA.004 3 GMP.TECEA.005 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
35、 ENGINEERING STANDARDS GMW16088 Copyright 2012 General Motors Company All Rights Reserved March 2012 Page 5 of 5 Appendix A Table A1: Type Definitions Type Hardness Range 1 60 5 Shore A 2 70 5 Shore A 3 80 5 Shore A 4 50 5 Shore A Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
