1、This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2014 by Navistar, Inc. APRIL 2014 Page 1 of 5 NAVISTAR, INC. Material, Parts, and Process Specifications
2、(MPAPS) NUMBER: MPAPS G-9012 Former Designation: TMS-9012 TITLE: IMC Properties for SMC Parts CURRENT REV No.: 1404 DATE: APRIL 2014 WRITTEN/EDITED BY: Materials Engineering APPROVED BY: Materials Engineering SUPERSEDES: TMS-9012 Feb. 2005 PRINTED COPIES OF THIS DOCUMENT MUST BE VERIFIED FOR CURRENT
3、 REVISION This specification may involve hazardous materials, equipment, and procedures. This specification does not purport to address all of the safety issues associated with its use. The user is responsible to consult appropriate safety and health practices and to determine the applicability of r
4、egulatory limits prior to use. Change Notice: Change to new MPAPS format; editorial changes. 1.0 APPLICATION This specification covers the in-mold coating (IMC) process and requirements for compression molded SMC parts that subsequently require finish paint to NAVISTAR specifications. Typical parts
5、include hood and fender assemblies and similar exterior applications. 2.0 SCOPE This specification covers surface appearance and dry film properties of in-mold coating (IMC), inspection, quality control and source approval for coated SMC parts prior to shipment to NAVISTAR. It also includes repair o
6、f IMC surfaces and handling of IMC parts. 2.1 Restricted Chemical Substances Effective January 1, 2007, all product supplied to the requirements of this specification must comply with the requirements of the MPAPS B-50 specification. 3.0 REFERENCE DOCUMENTS Unless otherwise specified the latest issu
7、e of all referenced standards shall apply. The following Specifications, Standards, and Regulations are referenced in this specification. Quality System Standard ISO 9001 or TS-16949 NAVISTAR TMS-9005 NAVISTAR MPAPS D-22 CFR Title 29, Part 1910 NAVISTAR Eng. Design Std. A-16 NAVISTAR Manufacturing S
8、td. MS-D-13 NAVISTAR CEMS GT-7E NAVISTAR CEMS GT-5A NAVISTAR CEMS GT-14A NAVISTAR CEMS GT-5B NAVISTAR CEMS GT-18 NAVISTAR CEMS GT-5C NAVISTAR CEMS GT-28 NAVISTAR CEMS GT-4D ASTM D4138 NAVISTAR CEMS GT-6B SAE J400 4.0 GENERAL REQUIREMENTS This specification is not intended to limit or specify the exa
9、ct process and materials to be used in providing SMC parts ready for topcoating at NAVISTAR paint operations. The control of the IMC NUMBER: MPAPS G-9012 TITLE: IMC Properties For SMC Parts REVISION: 1404 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without pe
10、rmission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2014 by Navistar, Inc. APRIL 2014 Page 2 of 5 quality and its application shall be the responsibility of the SMC part supplier. All IMC parts supplied must be compatible with the finish paint operatio
11、ns employed by the using NAVISTAR facility. 4.1 Priming of SMC parts that use IMC requires special treatment. In cases where coverage of the part is essentially complete, the use of only a spot primer may be satisfactory or no additional primer application may be needed (i.e. topcoat direct to IMC).
12、 In cases where coverage of the part with IMC is less than complete, the use of a sealer-primer will be required to seal the substrate. If the incompletely covered area is less than 2 inches in diameter, no priming may be necessary if the area does not show through after topcoat and does not promote
13、 surface defects, e.g. pitting and porosity. If the incompletely covered area is greater than 2 inches in diameter, or more than 3 instances of bare substrate occur, the use of a primer-sealer must be employed. 4.2 It is recognized that certain defects, such as porosity, may not be detectable in an
14、IMC part until after topcoat application. Isolated instances of porosity, as defined in Table 1, shall not be cause for rejection. Chronic cases of porosity requiring significant rework shall be cause for rejection and the responsibility of the vendor to correct. It is the responsibility of the supp
15、lier to ensure that all IMC parts are completely free of visible porosity and other defects, which would cause significant rework, prior to shipping the using NAVISTAR facility. . This will require close cooperation between the supplier, NAVISTAR Materials Engineering, and the paint facility. 4.3 Pe
16、rformance Requirements 4.3.1 Appearance Unless otherwise stated, all parts with IMC designated application shall be considered Zone I appearance parts (See Table 1 Zone I Requirements). This means the part is a primary, exterior, glamour surface, which requires the highest cosmetic standards and few
17、est defects. IMC coverage should be 99%. Areas with bare substrate shall be repaired in accordance with TMS-9005 and/or section 4.1 above. 4.3.2 Dry Film Requirements Dry film properties are given in Table II. The requirements apply to the IMC as processed in the mold after cure and part cool down.
18、4.3.3 Bake Temperatures Parts requiring primer application shall be oven-cured within the minimum and maximum schedules for time and temperature prescribed by the primer supplier. 4.3.4 Inspection Parts shall be inspected for appearance requirements at a distance of 2 feet under a fluorescent light.
19、 Samples illustrating acceptable and unacceptable surface conditions shall be displayed in the inspection area. 4.4 Repair Procedure 4.4.1 Priming Of Surface Repairs Sand-through of the IMC or incompletely covered areas greater than 2 inches in diameter must be primed and baked. Spot priming of thes
20、e areas is acceptable if there is no show-through of primer boundaries and the surface is adequately sealed. If show-through occurs or the surface is not sufficiently sealed, the entire part must be primed and baked. Spot priming without bake is acceptable NUMBER: MPAPS G-9012 TITLE: IMC Properties
21、For SMC Parts REVISION: 1404 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2014 by Navistar, Inc. APRIL 2014 Page 3 of 5 on areas less than 2 inches in
22、 diameter or no priming may be necessary if the transition area between the substrate and IMC cannot be read after topcoat and no surface defects occur. 4.4.2 Surface repairs that do not expose the substrate and are less than 2 inches in diameter require only the application of an air-dry primer app
23、roved by NAVISTAR. Primer may not be required if the repair does not show through the topcoat and does not promote surface defects. If the total area of these small repairs exceeds 5% of the part surface area, the part must be primed and baked. 5.0 SOURCE APPROVAL AND QUALITY CONTROL 5.1 Supplier Re
24、quirements All suppliers to NAVISTAR are required to be registered to ISO 9001 Quality System Requirements. NAVISTAR will also accept TS-16949 registration as long as the supplier can also fulfill all AIAG PPAP (Production Part Approval Process) documentation and approval requirements. Suppliers mus
25、t maintain their certification with an accredited registrar and must furnish copies of registration certificates to their Corporate Buyer upon request. 5.2 Approval Parts supplied against contracts or purchase orders citing this specification shall be equivalent in all respects to those samples whic
26、h were approved by the purchaser. No changes in formulation or processing practices are permitted without approval. In the event that changes in material, properties, processing practices, construction, color, or labeling of the product are required, the supplier shall notify Materials Engineering a
27、nd Purchasing and Supplier Development of the proposed change(s). Test data indicating conformance to all requirements of this specification, test samples, and new or amended or updated Material Safety Data Sheet(s) (MSDS), in accordance with CFR Title 29, Part 1910 shall be submitted with the reque
28、st for change. 5.3 Process Control The supplier shall either perform and report results of tests on specific lots of parts produced using ISO 9001 or TS-16949 guidelines, or provide statistical evidence of the lot having been produced in a state of statistical control and with a process capable of p
29、roviding all required properties. The part supplier and the quality control manager of the using plant may determine testing and reporting requirements on specific products. 6.0 SHIPPING, PACKING AND IDENTIFICATION Shipping, packing and identification shall be in accordance with NAVISTAR Manufacturi
30、ng Standard MS-D-13. Parts shall be packaged and shipped in such a manner so as to protect the surface finish in transit. 7.0 DESIGNATION ON DRAWINGS Example: IMC coated part per MPAPS G-9012 NUMBER: MPAPS G-9012 TITLE: IMC Properties For SMC Parts REVISION: 1404 This document is restricted and may
31、not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2014 by Navistar, Inc. APRIL 2014 Page 4 of 5 8.0 TECHNICAL INFORMATION For further information related to the technical content of this spec
32、ification, contact: Suppliers may purchase controlled copies of this specification by contacting: Materials Engineering and Technology Dept. 10400 W. North Avenue Melrose Park, IL 60160 E-mail: MaterialsEngineeringN IHS Global Inc. 15 Inverness Way East Englewood CO 80112-5776 Phone: 1-800-854-7179
33、E-mail: AutomotiveIHS.com Website: http:/ NUMBER: MPAPS G-9012 TITLE: IMC Properties For SMC Parts REVISION: 1404 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent li
34、ability. 2014 by Navistar, Inc. APRIL 2014 Page 5 of 5 TABLE 1 APPEARANCE REQUIREMENTS Zone I Requirement Craters greater than 1 mm diameter max. per square foot/per unit 1/2 Contamination (e.g. flash), max. number per square foot 0 Fine craters less than 1mm diameter, per square foot/ per unit 3/2
35、Streaking/fingering, instances 0 Scratches discernible by touch None TABLE 2 DRY FILM PROPERTIES FILM PROPERTY REQUIREMENT Test Method (CEMS or MPAPS, unless otherwise specified) Hardness, min. F GT-4D Adhesion, % min. 90 GT-5A Xylene Rub Pass GT-14A Accelerated Adhesion, % min. 90 (3B) GT-5C Intercoat Adhesion, % min. 90 GT-5B 500 hours Humidity % adhesion min. 90 GT-7E blisters None Gravelometer Test Requirement 2A per GT-28 SAE J400 Distilled Water Immersion No blisters or color change GT-7G Conductivity, min. 130 GT-18 Film Thickness, mils. min/max, avg. 1.0/5.0 ASTM D4138
