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1、I GENERAL MOTORS ENGINEERING STANDARDS I Materials and Processes - Paint I PRIMER SURFACER - HIGH SOLIDS, HIGH BAKE FOR ENAMEL 9984068 1 SCOPE. This specification covers the requirements for the typical 25 minutes at 163-C metal temperature bake, ther- mosetting, sandable, high solids, solvent-borne
2、 primer surfacer. It is applied by spraying and may be subsequently topcoated with acrylic enamel or waterborne color coat. The primer surfacer is intended to provide a smooth, adhesion pro- moting coating over previously applied primers such as cathodic E-coat. Some use may also be as a blackout co
3、lor in unexposed areas (i.e. underhood or underbody). These coated surfaces have additional requirements set forth in the specifica- tions for subsequent coatings. 2 REFERENCED STANDARDS. GMlOOOM GM4389M ASTM D1186 GM4356M 9984094 3 REQUIREMENTS. See GM4356M Iype I for addi- tional primer requiremen
4、ts not listed in this specification. The requirements listed below shall be met on all critical surfaces of the part or as designated by the applicable product engineer- ing documents. 3.1 RESTRICTED AND REPORTABLE CHEMICALS (GMlOOOM). All material supplied to this specification must comply with the
5、 requirements listed in GMlOOOM, Restricted and Reportable Chemicals”. 3.2 FILM THICKNESS (ASTM D1186): Primer Surfacer Only: Interior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 to30 p (0.6 to 1.2 mil) Exterior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
6、0 to 30 p (0.8 to 1.2 mil) 3.3 RECOMMENDED E-COAT IS 9984094 (MEDIUM BUILD). 3.4 MINIMUM GLOSS: Exterior Moist Sandable . . . . . . . . . . . . . . . . . . . . . . . . . 45 on a 20” meter Interior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7、 45 on a 20 meter 3.5 MELT-IN. The material has to be able to melt-in with wet-on-wet materials. The overspray areas shall not telegraph or have read through to topcoat. 3.6 COLOR. The color match, color standards, and color hiding panels must be approved by the responsible engineer. 4 SUPPLEMENTAL
8、INFORMATION. 4.1 APPLICATION AND BAKE The material must be capable of being applied by all common conventional spray equipment. The typical bake for these surfacers is 25 minutes at 163 C metal temperature. Baking within the range allowed by these process specifications shall have no effect on produ
9、ct durability. The supplier must provide complete data showing the viscosity-temperature relationship and circulation stability characteristics of the material. 4.2 PANEL PREPARATION. Guidelines for the qualifica- tion procedure are given in the GM4356M specification. The engineering group responsib
10、le for coordinating the material development should always be contacted prior to preparation of panels and initiation of tests to determine if the test program should deviate in any way from the specified GM4356M and plant applications. 4.2.1 A sufficient number of panels should be prepared to accom
11、modate all required tests; however, some tests may be combined on the same panels. Pretreatment and priming of panels will be established at the beginning of the test pro- grams, All bakes refer to substrate temperature in gas fired ovens. 4.3 SUBMISSION PACKAGE. Two (2) submission pack- ages shall
12、be prepared for distribution. One (1). package should be prepared for GM NAO Paint Engineering and the other for documentation retention to insure corporate product compli- ance with GM standards. Exposure and accelerated weathering test panels shall be retained by the supplier and be available for
13、review as long as the product is in production. The submis- sion packages shall contain a submission letter, panel preparation data, test data, product data sheet and key process control information. The package shall be dated and signed by the responsible Paint engineer, acknowledging that the test
14、 results met this specification. 5 SOURCE SHIPMENT RESPONSIBILITY. It will be the responsibility of the supplier to insure that the material is not exposed to temperatures during shipment which would cause the material to fail to meet any of the requirements of this specification. 6 INlTlAL SOURCE A
15、PPROVAL. No shipment shall be made by any supplier until representative initial production samples have been approved by engineering as meeting the requirements of this specification. 6.1 Completed copies of the GM Material Safety Data Sheet and Critical Material Register (available from the enginee
16、ring department or laboratory), or equivalent, must be submitted with any new submissions or where a composition change has 0CCUl-d 7 INSPECTION AND REJECTION. All shipments of material or parts under contract or purchase order manufac- tured to this specification shall be equivalent in every respec
17、t to the initial samples approved by engineering. There shall be no changes in either formulation or manufacturing processes permitted without prior notification and approval by engineer- ing. Lack of notification by the supplier constitutes grounds for rejection of any shipment. While samples may b
18、e taken from incoming shipments and checked for conformance to this specification, the supplier shall accept the responsibility for 0 Copyight MARCH 1997 General Motors Ccqm-ation #I Rihts ReServed MARCH 1997 PAGE 1 9984068 Copyright General Motors North America Provided by IHS under license with GM
19、 Licensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 06/23/2008 20:09:05 MDTNo reproduction or networking permitted without license from IHS -,-,- 1 GENERAL MOTORS ENGINEERING STANDARDS 1 Materials and Processes - Paint I PRIMER SURFACER - HIGH SOLIDS, HIGH BAKE FOR ENAMEL 9964068 inc
20、oming shipments meeting this specification without depen- dence upon purchaser s inspection. In addition the supplier shall be responsible for submitting a CERTIFICATE OF ANALYSIS with each batch of material arriving at a plant. This document shall be prepared and provide data in accor- dance with t
21、he requirements detailed in GM4389M. meeting the requirements of this specification. Sources are available through the on-line MATSPC System. 9 GENERAL INFORMATION. This specification was originated by Fisher Body in December 1981. The latest revi- sions include: 8 APPROVED SOURCES. Engineering qual
22、ification of an approved source is required for this specification. Only sources listed in the GM Corporate Materials File under this specification number have been qualified by engineering as Rev Date Description D 6192 Complete revision E 3/97 Removed Bake Chart 0 Copyright MARCH 1997 General Motors Corporatbn All Rights Reserved 9984068 PAGE 2 MARCH 1997 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 20:09:05 MDTNo reproduction or networking permitted without license from IHS -,-,-