1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2006 11 08 N-STATUS Replaced by WSS-M2P164-B A. Weakley 2003 08 21 Revised Para 3.0 inserted; Para 3.1, 3.2, 3.11, 4 deleted 1991 02 01 Released C01089481001 KW Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page
2、 1 of 3 PAINT PERFORMANCE, PRIMED PLASTIC PARTS, WSK-M2P164-A INTERMEDIATE STORAGE NOT TO BE USED FOR NEW DESIGN 1. SCOPE This specification defines performance requirements for primed plastic parts that are stored or shipped after priming prior to top coat application. 2. APPLICATION This specifica
3、tion was released originally to define performance requirements of primed plastic parts such as filler flaps or body side moldings. They shall be topcoated later with current approved paint materials. This specification may also be used for interior applications. 3. REQUIREMENTS 3.0 STANDARD REQUIRE
4、MENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.3 SYSTEM COMPONENTS 3.3.1 Substrate ABS, Polycarbonate, Polyamide, Polyurethane, Polypropylene or as specified on Engineering Drawing.
5、3.3.2 Plastic Preparation The surface to be painted shall be cleaned by an acceptable process, e.g. power wash, to remove mold releasing agents, fingerprints, oils, dirt and moisture. For Polypropylene Substrates a pretreatment, e.g. by flame process, corona discharge or plasma, may be necessary pri
6、or to painting to provide sufficient paint adhesion. 3.3.3 Primer Application of an adhesion primer or primer surfacer, film thickness and baking as required in the relevant Material Specification or as specified on Engineering Drawing. ENGINEERING MATERIAL SPECIFICATIONWSK-M2P164-A Printed copies a
7、re uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 2 of 3 3.3.4 Ageing Test panels or test specimens prepared for investigations according to this specification must be aged for at least 72 hours at 23 +/- 2 C or 16 hours at 45 +/- 1 C prior to testing if not otherwise required in th
8、e relevant primer Material Specification. 3.3.5 Production Paint Repair Repaired areas must meet the requirements of this specification. All repair materials and processes used must be approved by the affected Product Engineering Office. Maximum film thickness for repaired parts will be specified in
9、 the mutually agreed control plan. 3.4 APPEARANCE Color and gloss of the primed part shall be as required in the relevant primer material specification or as specified on Engineering Drawing. Color and gloss of the finished part shall meet the requirements of the relevant paint performance specifica
10、tion. 3.5 RESISTANCE PROPERTIES 3.5.1 Adhesion Grade 0 (FLTM BI 106-01, Method B) 3.5.2 Water Immersion Test 24 h (FLTM BI 104-01) No blistering, softening or loss of adhesion per 3.5.1. 3.5.3 Resistance to Water Spotting max. discoloration Rating 4 (FLTM BI 113-01, no soap spotting) Evaluation acco
11、rding to the AATCC Scale. 3.6 ENVIRONMENTAL CYCLING (Initial Approval Only) 3 cycles (FLTM BQ 104-07, Procedure 5) Evaluation after 20 h conditioning at 23 +/- 2 C. No cracking, no blistering, no loss of adhesion per 3.5.1. 3.7 RESISTANCE TO CLEANING OPERATIONS Primed plastic parts shall withstand a
12、 cleaning process as used in production prior to the paint process, eg. power washer. No water spotting or loss of adhesion permitted. ENGINEERING MATERIAL SPECIFICATIONWSK-M2P164-A Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 3 of 3 3.8 INITIAL HARDNESS The fin
13、ish shall be sufficiently hard at time of packing and shipping to withstand normal handling without damage. 3.9 SANDING After curing, the primer can be sanded manually at room temperature in case of spot repair. 3.10 COMPATIBILITY AFTER STORAGE 42 days Primed parts shall be suitable for top coat application as well as painting with an additional primer layer prior to top coat application after 42 days storage. After painting, the plastic parts shall meet all requirements of the relevant paint performance specification as required on Engineering Drawing, eg. WSK-M2P143-A or WSK-M2P145-A.
