1、 WORLDWIDE ENGINEERING STANDARDS Material Specification GMW16575 PVC - Flexible, Heat Stabilized, 60 to 90 Shore A, Mineral Filled, Extrusion or Injection Molding Compound Copyright 2012 General Motors Company All Rights Reserved July 2012 Originating Department: North American Engineering Standards
2、 Page 1 of 5 1 Scope 1.1 Material Description. This specification covers the properties of a flexible, heat stabilized, mineral filled, Polyvinyl Chloride (PVC) Homopolymer, pellet form, extrusion or injection molding compound. Materials are delineated by “Type” indicating Shore A or D hardness and
3、“Grade”, indicating the intended molding process. 1.2 Symbols. The material abbreviation according to ISO 11469 is PVC . 1.3 Typical Applications. Typical applications include, but are not restricted to, automotive roof and moveable roof drain hoses, drain hose connectors and paintable grade PVCs. 1
4、.4 Identification. PVC materials approved to this specification will be called out on the engineering drawing indicating both attributes shown in Appendix A, Tables A1 and A2, e.g., GMW16575P-PVC-Type X-Grade X. In addition, if the nominal production Shore hardness for a component is different than
5、the nominal Type stated herein, it shall be called out specifically on the engineering drawing or in the math data, e.g., Type 1 = 60 5 Shore A, but 62 Shore A is being used, 62 X Shore A hardness shall be called out. 2 References Note: Only the latest approved standards are applicable unless otherw
6、ise specified. 2.1 External Standards/Specifications. ISO 176 ISO 527 ISO 1183 ISO 11469 ISO 188 ISO 868 ISO 3451-1 SAE J323 2.2 GM Standards/Specifications. GMW3013 GMW3221 GMW14650 GMW14797 GMW3059 GMW3235 2.3 Additional References. TMC003 Material Safety Data Sheet guidance documents (available a
7、t ). 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 characterize the material are
8、summarized in Table 1. Note: For each product, the requirements to Table 1 shall be documented by Certification Statement according to GMW3013. The color and gloss shall be specified on drawings, in material specifications and otherwise. 3.2 Requirements on Test Specimens. Tests shall be conducted u
9、sing the latest issue of the test procedures 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 Test specimens shall be die cut from fan
10、 gated injection or compression molded plaques having a nominal thickness of 3.2 mm 0.2 mm. If injection molded, 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 Test samples
11、shall be aged a minimum of 40 h after molding and 24 h immediately following a conditioning period 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 Copyright General Mo
12、tors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16575 Copyright 2012 General Motors Company All Rights Reserved July 2012 Page 2 of 5 conducted at the specif
13、ied temperature using 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 pi
14、gment and additive systems (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. Table 1: Compound Properties (Black) Note 1 Property Test Procedure Unit Type 1 Type 2 Type 3 Type 4 Type 5 Shore Hardnes
15、s ISO 868, 15 s delay Shore A or D 60 5 A 70 5 A 85 5 A 40 5 D 50 5 D Density ISO 1183 g/cm3 Target Range 1.15 to 1.25 Target Range 1.20 to 1.40 Target Range 1.30 to 1.40 Target Range 1.30 to 1.40 Target Range 1.30 to 1.40 Tensile Stress at Break ISO 527, Type 1A dumbbell, 500 mm/minute MPa 10 12 16
16、 18 20 Elongation at Break ISO 527, Type 1A dumbbell, 500 mm/minute % 250 225 200 200 200 Ash ISO 3451-1, Method A % 0 to 20 0 to 20 10 to 25 9 to 15 0 to 25 Volatile Loss ISO 176 % 5.0 5.0 5.0 3.0 3.0 Fogging GMW3235-B at 85 C 5 C mg 2.0 2.0 2.0 N/A N/A Cold Flexibility Mandrel Test SAE J323, Metho
17、d A. Use Table 2 for mandrel size selection based upon hardness. 3.2 mm 0.2 mm sample thickness N/A No Cracks Properties After Heat Age Exposure ISO 188 Method B. 168 h at 85 C followed by indicated property testing % 25% maximum of Hardness, Tensile Stress at Break, Elongation at Break. No tackines
18、s Note: Perform indicated property testing at 22 C 3 C. Use original mechanical property test procedures. Note 1: Properties shown are guidelines for each type material. Nominal values are defined in the material certification submission package at the time of approval. N/A = Not applicable Copyrigh
19、t 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 GMW16575 Copyright 2012 General Motors Company All Rights Reserved July 2012 Page 3 of 5 Table 2: Ma
20、ndrel Size Selection Chart Hardness - Mandrel Size Hardness - Mandrel Size 50 to 70 Shore A - 6 mm 37 to 45 Shore D - 25 mm 75 to 95 Shore A - 12 mm 50 to 80 Shore D - 50 mm 3.4 Performance Requirements. 3.4.1 Part Performance. See GMW14650 (DS85, RE20SH). 3.4.2 Approved Paint on Plastics System (AP
21、OPS). PVC grades intended to be used a paintable PVC must meet the performance as defined in GMW14797, Approved Paint on Plastics Systems. 3.5 Additional Requirements for Approval. The following are also required for full specification approval. The minimum number of lots per test required is one fo
22、r: Youngs Modulus Poissons Ratio Stress-Strain Curve at 23 C 3.5.1 Test procedures for these required material properties are defined in the material certification “Test Sampling Plan” (TSP) per GMW3013 certification sheet. 4 Manufacturing Process Not applicable. 5 Rules and Regulations 5.1 Legal Re
23、gulations. 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 Rejection. Samples of componen
24、ts 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 received for any changes, e.g.
25、, 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 solicitation, and to include
26、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, a shorter test can be a
27、greed 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 meeting the requirements of t
28、his 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 in compliance with the Gl
29、obally 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/Safety Data Sheet guidance d
30、ocuments where available. 5.6 All materials supplied to this standard must comply with the requirements of GMW3059, Restricted and Reportable Substances for Parts. Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking pe
31、rmitted without license from IHS-,-,-GM WORLDWIDE ENGINEERING STANDARDS GMW16575 Copyright 2012 General Motors Company All Rights Reserved July 2012 Page 4 of 5 6 Approved Sources Engineering qualifications of an approved source are required for this standard. Only sources listed in the GM Materials
32、 File, Supply Power, under this standard number have been qualified by Engineering as meeting the requirements of this standard. 7 Notes 7.1 Glossary. Not applicable. 7.2 Acronyms, Abbreviations, and Symbols. APOPS Approved Paint on Plastics System GHS Globally Harmonized System of Classifications a
33、nd Labeling of Chemicals IR Infrared MSDS Material Safety Data Sheet N/A Not applicable PVC Polyvinyl Chloride SDS Safety Data Sheet TSP Test Sampling Plan 8 Coding System This standard shall be referenced in other documents, drawings, etc., as follows: Material per GMW16575P-PVC-Type X - Grade X Wh
34、ere: GMW = GM Worldwide Specification 16575 = Sequential Number P = Plastic PVC = Polyvinyl Chloride Type X = Type 1 to 3 as defined in Table A1 Grade X = E or I as defined in Table A2 9 Release and Revisions This standard was originated in March 2011. It was first approved by the Global Plastics Te
35、am in May 2011. It was first published in May 2011. Issue Publication Date Description (Organization) 1 MAY 2011 Initial publication. 2 JUL 2012 Added Types 4 and 5. (Plastics Global Subsystem Leadership Team) Cross-Reference of Replaced Specifications GMW16575 Material Codes Formerly Identified As
36、Type 1, Grade I GMP.PVC.029 Type 3, Grade E GMP.PVC.030 Type 4, Grade E GMP.PVC.056 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 GMW16575
37、 Copyright 2012 General Motors Company All Rights Reserved July 2012 Page 5 of 5 Appendix A Table A1: Shore Hardness Type Shore Hardness 1 60 5 Shore A 2 70 5 Shore A 3 85 5 Shore A 4 40 5 Shore D 5 50 5 Shore D Table A2: Molding Grade Grade Process E Extrusion I Injection Copyright General Motors Company Provided by IHS under license with General Motors CompanyNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
