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1、 ENGINEERING STANDARDS Material Specification Plastics GMP.PUR.051 Polyurethane ISRIM UV Stable, Integral Skin, Foam 1 Scope This specification covers the properties of an unpainted, UV stable, integrally colored black or very dark gray, reaction injection molded polyurethane integral skin foam. Thi
2、s material is UV stabilized and does not require paint to meet the part performance requirements for natural weathering. This material is limited to black and black family colors (such as ebony 167A). 1.1 Material Description. This material is to be UV stabilized and intended to be used without pain
3、t. All interior colors will not be able to be achieved with this material at the desired UV performance level. In the event specific, non- black like colors are needed that cannot be achieved molded-in-color please utilize GMP.PUR.001 and paint. Approved paint systems that can be used on that materi
4、al are listed in the GM Approved Paint on Parts Systems (GM APOPS) database. 1.2 Typical Application. Typical applications include the following: Steering Wheels and Shift Knobs. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards/S
5、pecifications. ISO 845 ISO 3386 ISO 1798 SAE J1545 2.2 GM Standards/Specifications. GM9538P GMW3059 GMP.PUR.001 GMW3116 GMW3001 GMW3221 GMW3013 GMW3417 3 Requirements Materials approved to this specification shall meet the standard requirements of GMW3013. 3.1 Requirements on Delivery. Important phy
6、sical, mechanical and thermal properties that characterize the material are summarized in charts. The color shall be specified on drawings, in material specifications and otherwise. 3.1.1 Requirements on Test Specimens. Tests shall be conducted using the latest issue of the test methods indicated. S
7、uitable 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 specifications. Properties shall be determined using test specimens cut from molded blocks 200 x 200 x 45 mm minimum si
8、ze with and overall density of 400 kg/m3. Skin properties shall be determined from specimens cut from the outer 2 mm of the block. The core properties shall be determined using specimens from the center 10 mm of the block thickness. All test specimens shall be brought to equilibrium in standard cond
9、itions for temperature and moisture and tested in that state as defined in GMW3221 Code A, unless the test method indicates that standard conditioning is not required. Condition specimens for a minimum of 24 h prior to testing or until moisture equilibrium is reached. If specimens are tested outside
10、 the conditioned environment, they shall be tested within 10 minutes of removal. An equal number of specimens shall be cut from both the longitudinal and transverse plaque direction for each mechanical property. The specimens shall be tested and the results averaged. The average value is the materia
11、l property value. This value is compared to the required value shown in the Compound Properties table(s). 3.1.2 Colorfastness Evaluation Procedure. The color of each test specimen shall be measured per SAE J1545, CIELAB color space, 10 degree observer, illuminant D65, specular included, sphere geome
12、try, before and after exposure. 3.1.3 Chemical Requirements. All parts manufactured from molding compounds shall be resistant to the media they contact, such as Copyright 2004 General Motors Corporation All Rights Reserved December 2004 Originating Department: North American Engineering Standards Pa
13、ge 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 23:28:53 MDTNo reproduction or networking permitted without license from IHS -,-,- GMP.PUR.051 GM ENGINEERING STANDARDS Copyright 2004
14、General Motors Corporation All Rights Reserved Page 2 of 3 December 2004 aliphatic and aromatic hydrocarbons, fuels, lubricants, oils, greases and alcohols, at their places of use. 3.1.4 Compound Properties (Black). See table 1. Table 1: Compound Properties. (Black) Properties Standard Unit Values A
15、pparent Density (core) ISO 845 Kg/m3275-450 Tensile strength at Break (core) ISO 1798 Figure 1 test bar, test speed 500 50 mm/min Specimen thickness shall be 10.0 0.2 mm KPa 900-2000 Elongation at Break (core) ISO 1798 Figure 1 test bar, test speed 500 50 mm/min Specimen thickness shall be 10.0 0.2
16、mm % min60 Compression Load at 40% deflection (core) ISO 3386/1 or 3386/2 Specimen to be core material only KPa 180 to 650 Tensile strength at Break (skin) ISO 1798 Figure 1 test bar, test speed 500 50 mm/min Specimen thickness shall be 2.0 0.2 mm KPa 2900-6000 Elongation at Break (skin) ISO 1798 Fi
17、gure 1 test bar, test speed 500 50 mm/min Specimen thickness shall be 2.0 0.2 mm % min85 3.1.5 Compound Properties (Integrally Colored) See table 2. Table 2: Compound Properties (Integrally Colored) Properties Standard Unit Values ULTRAVIOLET LIGHT STABILIZED Natural Weathering Exposure to Natural W
18、eathering, per GM9538P, U/G-TSTL-093 to 55 000 TNR Langleys. Reference GMW3417 for TNR calculation only. Color Change After Solar E 3.0 (for information only) No objectionable surface deterioration, color or gloss change, warpage, sag, staining, delamination or other undesirable effects are allowed
19、after exposure. Visual evaluation overrides measured values. 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 23:28:53 MDTNo reproduction or networking permitted without license from IHS -,-,- G
20、M ENGINEERING STANDARDS GMP.PUR.051 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
21、comply with the requirements of GMW3059, Restricted and Reportable Substances for Parts. 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 qualif
22、ied by engineering as meeting the requirements of this specification. 7 Coding System This material specification shall be referenced in other documents, drawings, VTS, CTS, etc. as follows: Material per GMP.PUR.051 8 Release and Revisions 8.1 Release. This material specification originated in June
23、2003 and was approved by Urethane Specialist Team in June 2003. It was first published in June 2003. 8.2 Revisions. Rev Approval Date Description (Organization) A JUN 2004 Scope clarity, added application, opened up physical properties to include pentane blown foam systems (GMNA) Copyright 2004 Gene
24、ral Motors Corporation All Rights Reserved December 2004 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 23:28:53 MDTNo reproduction or networking permitted without license from IHS -,-,-