1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2003 08 28 Revised Para 3.0 inserted; Para 3.12 & 4 deleted 1978 11 07 Metricated and Retyped CF4H-RD567168-35 1963 03 25 Released F6-1034 Printed copies are uncontrolled Copyright 2003, Ford Global Technologies, Inc. Page 1 of 3 METALLIZE, PL
2、ASTIC PARTS (FIRST SURFACE) ESF-M5P1-A 1. SCOPE This specification defines the performance requirements and processing procedure for decorative first surface coatings on interior thermoplastic or thermosetting plastic parts involving vapor deposition of metals in a vacuum. The term “first surface“ m
3、eans the surface first meeting the eye when the part is installed in position. 2. APPLICATION This specification was released originally for a finish used on plastic parts, either clear or opaque, where a bright metallic appearance is desired. Usage shall be governed by the nominal abrasion resistan
4、ce of the protective coating applied over the metallized surface. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.1 COLOR AND LUSTER Vacuum metalli
5、zing shall match master sample approved by Quality Control for Color Match (FLTM BI 109-01) and Gloss (FLTM BI 110-01). 3.2 INITIAL HARDNESS The finish shall be sufficiently cured at time of packing to withstand normal handling and shipping without marring. 3.3 ADHESION A 3/4 in (19 mm) wide strip o
6、f adhesive cellophane tape ESB-M3G68-A shall be applied to the finished surface. Upon quick removal of the tape, none of the finish shall adhere to the tape. 3.4 SCRATCH TEST Scratch the finished surface with a sharp instrument, 16 lines/in (25 mm) in one direction. Scratch at right angles to the fi
7、rst lines, forming complete squares. Repeat the adhesion test as listed in para 3.3. *3.5 EXPOSURE (FLTM BO 115-02) Parts must meet requirements of para 3.1 and must not show any evidence of peeling, blistering or flaking. ENGINEERING MATERIAL SPECIFICATIONESF-M5P1-APrinted copies are uncontrolled C
8、opyright 2003, Ford Global Technologies, Inc. Page 2 of 3 3.6 OPACITY The metallized areas shall be opaque on clear plastic parts which are backlighted or edge-lighted. Metal film thickness on all parts shall be sufficient to give the finished surface a bright lustrous metallic appearance. If a colo
9、red pigmented base coat is desired for improved opacity or to match standard for luster or lighting, the part print shall so specify. 3.7 APPEARANCE The surface of the part as finished shall be free from dirt, lint, and other contaminants. Masking, if required, shall produce a sharp line of demarcat
10、ion between metallized and non-metallized areas. There shall be no visible runs, sags, or blisters in the base or top coat and no fogging of the non-metallized portion. 3.8 HEAT AND COLD RESISTANCE *3.8.1 Parts must meet the requirements of para 3.3 and 3.5 after conditioning according to one comple
11、te cycle consisting of: . 85 +/- 1 C for 24 h . 23 +/- 2 C for 3 h . -29 +/- 1 C for 24 h *3.8.2 Parts must meet the requirements of para 3.7 and must not change in chemical and physical properties after one complete cycle consisting of: . 80 - 82 C for 24 h . 23 +/- 2 C for 3 h . -29 +/- 1 C for 24
12、 h . 23 +/- 1 C for 24 h *3.9 CLEANERS AND WAX RESISTANCE Parts must meet the requirements of para 3.1 and 3.3 after subjection to a coating of the following cleaners and waxes for a period of 24 h. These materials shall be applied as directed by the instructions on the containers of the individual
13、compounds. After the exposure period, the parts shall be wiped and/or rinsed and examined per para 3.1 and 3.3. Test Compounds Part Number Wax B4A-19534-A Tar and Road Oil Remover B7A-19520A Porcelainize Liquid B7A-19528A Cleaner Wax and Polish B7A-19530-A Liquid Detergents (Undiluted) - 3.10 WATER
14、SPOT AND SOAP TEST, max (FLTM BI 113-01) Water Spot 0.3 N.B.S. Units Soap Spot 0.8 N.B.S. Units ENGINEERING MATERIAL SPECIFICATIONESF-M5P1-APrinted copies are uncontrolled Copyright 2003, Ford Global Technologies, Inc. Page 3 of 3 *3.11 WEAR RESISTANCE, min 250,000 cycles (FLTM BO 019-01) *Note: Sep
15、arate parts, from the same lot, are to be used for each one of these tests permitting them to be run concurrently. 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. The following procedure and materials
16、have been found to produce a metallized coating which will meet requirements of this specification. Parts should be metallized as soon after molding as is practical. The surface shall be free from dirt, lint, mold release agents, fingerprints and any other contaminants. 5.1 STRESS RELIEVE Thermoplas
17、tic parts with intricate patterns of varying wall thicknesses may be susceptible to crazing or cracking from residual stress. Parts shall be tested as described below before coating is applied to determine necessity for stress relieving. If parts show cracking, crazing, or checking, they must be str
18、ess relieved according to a cycle agreed upon by the supplier and the responsible Product Engineering Office. 5.1.1 Test for Residual Stress Expose parts to three complete cycles as listed in FLTM BO 115-01. Examine parts for cracking, crazing, or checking. If not evident, stress relieving is not re
19、quired. 5.2 BASE COAT Apply (spray, flow or dip) base coat material to surface of part on area to be metallized. Part must be clean and dry. 5.3 BAKE Heat part in oven with good air circulation at the time-temperature cycle recommended by the supplier of the base coat material for the type of plasti
20、c involved. 5.4 METALLIZE Apply a coating of metal, to the area specified, by evaporation in a vacuum. Conditions will be determined by film thickness, opacity, luster, etc., desired. 5.5 TOP COAT Apply, over the metallized surface, a coating of clear top coat material. Film thickness shall be sufficient to give the finished surface reasonable wear resistance. 5.6 BAKE Heat in oven with good air circulation as recommended by supplier of top coat material. Note: Similar to Mfg. Standard P-139.
