GMW GMW16005-2013 Adhesion Requirements for Modular Encapsulated Glass Assemblies Issue 2 English.pdf
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1、 WORLDWIDE ENGINEERING STANDARDS Material Specification GMW16005 Adhesion Requirements for Modular, Encapsulated Glass Assemblies Copyright 2013 General Motors Company All Rights Reserved May 2013 Page 1 of 5 1 Scope 1.1 Material Description. This specification is intended to cover the adhesion perf
2、ormance for the encapsulation material (Polyvinyl Chloride (PVC), Reaction Injection Molded (RIM), Ethylene Propylene Diene (EPDM), Thermoplastic Elastomer (TPE), etc.) to glass in a modular glass assembly. 1.1.1 Part testing is to be accomplished in both of the two methods discussed in this standar
3、d. 1.2 Symbols. Not applicable. 1.3 Typical Applications. Applications subject to this performance requirement are fixed encapsulated glass such as automotive quarter (side) glass. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standards
4、/Specifications. ISO 188 2.2 GM Standards/Specifications. GMW3059 GMW3368 GMW14729 GMW3221 GMW14124 2.3 Additional References. TMC003 Material Safety Data Sheet guidance documents (available at ). 3 Requirements 3.1 Requirements on Test Specimens. Reference GMW3221. 3.1.1 Sample Conditioning. All sa
5、mples are to be conditioned prior to each requirement test to GMW3221, Code A. 3.2 Test Samples. Production intent parts shall be used to verify capability of the intended part materials and process. 3.2.1 A total of 25 modular glass assemblies, five (5) per environment, shall be used for each test
6、performed. Pull Off Test and/or Quick Knife Adhesion (QKA) Test. 3.3 Equipment. 3.3.1 Universal tensile testing machine capable of maintaining a jaw separation rate of 10 mm/minute 0.1 mm/minute and indicating a load of at least 2000 N. The indicated load shall have a variance not to exceed 1% of fu
7、ll scale. 3.3.2 Clamping fixture as described in Figure 1. 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 GMW16005 Copyright 2013 General M
8、otors Company All Rights Reserved May 2013 Page 2 of 5 Figure 1: Sample Preparation 3.3.3 Conditioning chamber/equipment capable of maintaining the environments described in 3.4.3. 3.3.4 Protective (heat resistant) gloves for handling environment exposed parts. 3.4 Physical Requirements. 3.4.1 Pull
9、Off Test. A 50 mm length of the encapsulation material shall be isolated from the surrounding encapsulation by cutting through the molding material to the glass surface. See Figure 1. 3.4.1.1 Specimen shall be clamped in pull fixture. See Figure 2. 3.4.1.2 Tensile test machine shall be set for a jaw
10、 separation of 10 mm/minute. 3.4.1.3 Maximum load at break, and the mode of failure, shall be recorded. 3.4.1.4 Requirement. The bond between the encapsulation material and the glass shall exceed 890 N when tested per this method. In addition to the minimum load, the resulting separation mode of the
11、 system shall be cohesive within either the encapsulation material and/or the adhesive system. These requirements shall be maintained after exposure to the test environments described in 3.4.3 after 1 h recovery at room temperature. The recovery temperature is to be recorded at the time of test. 361
12、 1-0 02( 06/ 02)50 mmCut s th roug h do wnto th e g lassCopyright 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 GMW16005 Copyright 2013 General Moto
13、rs Company All Rights Reserved May 2013 Page 3 of 5 Figure 2: Pull Fixture 3.4.2 Modified Quick Knife Adhesion Test, GMW3368. Production parts shall be used to verify capability of the intended part materials and process for this method. 3.4.2.1 Isolate a flat, planar section of the encapsulating ma
14、terial from the rest of the encapsulation by cutting through the material 90 degrees to the plane of the glass. Cut down to the glass from the planar cut lengthwise along the glass edge for a minimum of 150 mm. Treat this isolated section of the encapsulated material as the adhesive bead mentioned i
15、n the test procedure section of GMW3368. Report the separation mode between the layers and amounts by percentage. 3.4.2.2 Requirement. When encapsulated assemblies are tested according to the modified GMW3368 procedure, the resulting separation mode of the encapsulation material and/or the adhesive
16、system shall be cohesive within either or both of those layers. This cohesive separation mode shall be maintained after exposure to the test environments described in 3.4.3 after 1 h aging at room temperature to be recorded at the time of test. Note: Quick Knife Adhesion may not be applicable to Rea
17、ction Injection Molded (RIM) encapsulation. Deviations with other methods such as 180 degree peel may be used, but must be agreed to by the responsible GM Engineering Group prior to the onset of testing. 3.4.3 Exposures. A sample set shall consist of a minimum of five (5) specimens. One (1) sample s
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