GMNA-GMP.PE.017-2003.pdf

ENGINEERING STANDARDS Material Specification Plastics GMP.PE.017 Polyethylene 25% Filled, High Density, Sheet Extrudable, Blow Moldable, Homopolymer 1 Scope This specification covers the properties of a 25% talc filled, high density, sheet extrudable, blow moldable, and polyethylene homopolymer. 1.1 Symbol. The material abbreviation according to ISO 11469 is PE-TD25 1.2 Typical Applications. Typical applications include the following: Underhood air induction components, seat backs, and HVAC ducts. 2 References Note: Only the latest approved standards are ap- plicable unless otherwise specified. 2.1 External Standards/Specifications. ASTM D638 ASTM D1928 ASTM D648 ASTM D3763 ASTM D790 ISO 11469 ASTM D792 2.2 GM Specifications. GM9036P GMW3059 GMW3001 3 Requirements 3.1 Requirements on Delivery. Requirements for Test Specimens Tests shall 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 pro- cedures, processes, and/or handling the materials required by this specification. Test specimens shall be compression molded according to ASTM D1928; Procedure C. Test specimens shall be 1.9 ± 0.2 mm thick unless oth- erwise specified in this GMP specification. Tests shall be conducted 40 h minimum after molding and immediately following a conditioning period of 24 h minimum at 22 ± 3°C and 50 ± 5% RH 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 tempera- ture using specimens conditioned at the specified temperature for 4 h minimum. Tests shall be conducted on dry-as-molded, unan- nealed test specimens. The minimum values specified in the property ta- bles must be met by test specimens in natural, black, or in a standard sampled color if natural or black are not available. 3.1.1 Chemical Requirements. All parts manu- factured from molding compounds shall be resis- tant to the media they contact, such as aliphatic and aromatic hydrocarbons, fuels, lubricants, oils, greases and alcohols, at their places of use. © Copyright 2003 General Motors Corporation All Rights Reserved June 2003 Originating Department: North American Engineering Standards Page 1 of 3 Copyright General Motors North America Provided by IHS under license with GM Licensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 06/23/2008 23:26:59 MDTNo reproduction or networking permitted without license from IHS -,-,- GMP.PE.017 GM ENGINEERING STANDARDS 3.1.2 Mechanical Requirements. Table 1: Mechanical Requirements Mechanical Properties Test Methods Unit Value Tensile Stress at yield ASTM D638, Type I bar, 50 mm/minute, die cut or machined MPa28 min Elongation ASTM D638, Type I bar, 50 mm/minute, die cut or machined % 6.5 min Flexural Modulus at +22 °C ASTM D790, Method I, 1.3 mm/minute, 50 mm span, 3.2 mm thick specimen, tangent calculation, die cut or machined MPa1950 min Multiaxial Impact Strength at 0 °C Speed = 6.7 m/s ASTM D3763, 100 mm diameter or 100 x 100 mm, 3.2 mm thick, smooth surface, edge gated, injec- tion molded specimen J 14.5 min at max load. 3.1.3 Physical Requirements. Table 2: Physical Requirements Physical Properties Test Methods Unit Value Specific Gravity ASTM D792 1.09 to 1.21 Filler GM9036P % by mass 22 to 28 HDT - 0.45 MPa ASTM D648, unannealed, edgewise °C 96 min 3.2 Processing Requirements. Subparagraphs were not applicable. 3.3 Performance Requirements. Performance Requirements e.g., flammability, fogging or resistance to odor shall be specified on part drawings or in component specifications. 4 Manufacturing Process Not applicable. 5 Rules and Regulations 5.1 All materials supplied to this specification must comply with the requirements of GMW3001, Rules and Regulations for Material Specifications. 5.2 All materials supplied to this specification must comply with the requirements of GMW3059, Re- stricted and Reportable Substances for Parts. © Copyright 2003 General Motors Corporation All Rights Reserved Page 2 of 3 June 2003 Copyright General Motors North America Provided by IHS under license with GM Licensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 06/23/2008 23:26:59 MDTNo reproduction or networking permitted without license from IHS -,-,- GM ENGINEERING STANDARDS GMP.PE.017 6 Approved Sources Engineering qualification of an approved source is required for this specification. Only sources listed in the GM Materials File (i.e., MATSPC) under this specification number have been qualified by engi- neering as meeting the requirements of this speci- fication. 7 Coding System This material specification shall be referenced in other documents, drawings, VTS, CTS, etc. as follows: GMP.PE.017 8 Release and Revisions 8.1 Release. This material specification originated in February 1997 and was approved by Plastics TDG in 1998. It was first published in February 2002. 8.2 Revisions. Rev Date Description (Organization) A JUN 2003 ISO symbol was corrected (Interior Coatings Specialist). © Copyright 2003 General Motors Corporation All Rights Reserved June 2003 Page 3 of 3 Copyright General Motors North America Provided by IHS under license with GM Licensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 06/23/2008 23:26:59 MDTNo reproduction or networking permitted without license from IHS -,-,-