1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions Rev. 0 2012 06 22 Activated Replaces WSK-M4D729-A A. Pan , APAControlled document at www.MATS Copyright 2012, Ford Global Technologies, LLC Page 1 of 5 POLYBUTYLENE TEREPHTHALATE (PBT), 30% GLASS WSS-M4D725-B1 FIBER REINFORCED MOLDING COMPOUND
2、 1. SCOPE The material defined by this specification is a 30% glass fiber reinforced thermoplastic polyester injection molding compound based on polybutylene terephthalate (PBT). 2. APPLICATION This specification was released originally for material used for electrical connectors and fixed mirror br
3、acket. 2.1 LIMITATIONS Material approved to this specification does not contain proper UV stabilizers in the natural resin for direct sunlight exposure in exterior applications. Therefore long term exposure to direct sunlight could cause chalking and loss of gloss. 3. REQUIREMENTS 3.1 STANDARD REQUI
4、REMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements for Production Materials (WSS-M99P1111-A). 3.1.1 Many 4D resin specifications prior to 2011, identified certain requirements with the symbol (s), which indicated that the mean an
5、d +/- 3 sigma values were to be reported. The specification minimum, maximum or range was established using 3 sigma data. For 2011 and beyond, refer to Table 1 for number of samples required for each test to establish specification limits. 3.1.2 This specification is based on virgin materials. Mater
6、ials with post-consumer, post-industrial, or repolymerised recycled materials as defined by WRS-M99P42-A1 are preferred and should be used whenever feasible. 3.1.3 The use of regrind is permitted, for economic / environmental reasons, with compliance as indicated in Ford Engineering CAD and Drafting
7、 Standard E-4. 3.1.4 Performance Criteria: Parts using this specification shall meet the relevant SDS requirements 3.2 SAMPLE PREPARATION Unless otherwise specified all tests shall be carried out on injection molded, one-end gated test specimens. The test specimens A and D shall be molded using mold
8、ing conditions defined in ISO 7792-2. No annealing is allowed. See Tables 1 and 2 for the number of samples required. ENGINEERING MATERIAL SPECIFICATIONWSS-M4D725-B1 Copyright 2012, Ford Global Technologies, LLC Page 2 of 5 Specimens shall be as follows: Specimen A 150 minimum x 10 x 4.0 +/- 0.2 mm
9、(ISO 527-2, Specimen Type 1A) Specimen B 355 x 100 x 1.0 +/- 0.1 mm (ISO 3795) Specimen C 145 x 60 x 3.2 +/- 0.2 mm Specimen D Center of Specimen A, 80 x 10 x 4.0 +/- 0.2 mm Specimen E 100 mm diameter x 3.2 mm Specimen F 80 mm diameter x 3.2 mm Specimen G 90 mm x 200 mm Specimen H 50 +/- 1 mm diamet
10、er x 3.2 +/- 0.2 mm Specimen I 100 mm x 150 mm, min 3.3 MATERIAL PROPERTIES 3.3.1 Filler Content 28 - 32 % (ISO 3451/2, glass fiber, test temperature 750 +/-25 C, test portion 2.5 - 3.0 g) 3.3.2 Density 1.48 - 1.59 g/cm3(ISO 1183, Method A) 3.3.3 Tensile Strength at Break 115 MPa min (ISO 527-1 At 2
11、3 +/- 2 C 9 kJ/m23.4.5.2 3.4.5.2 Impact Strength, Notched Izod ; At -40 +/- 2 C 7 kJ/m23.4.6 Poissons Ratio 0.42 N/A 4.2 MATERIAL IDENTIFICATION FOR RECYCLING PURPOSES PBT-GF30 (ISO 1043/ 11469) ENGINEERING MATERIAL SPECIFICATIONWSS-M4D725-B1 Copyright 2012, Ford Global Technologies, LLC Page 5 of 5
12、 Table 1: Minimum Sample Size Initial Approval New Manufacturing Location for Previously Approved Material Para. Test Minimum Lots Specimens per Lot Total Test Specimens Lots Specimens per lot Total Test Specimens 3.1 WSS-M99P1111-A 3.3.1 Filler Content* 3 1 3 1 1 1 3.3.2 Density 1 3 3 3.3.3 Tensile
13、 Strength at Break* 3 5 15 1 5 5 3.3.4 Tensile Modulus 1 10 10 3.3.5 Flexural Modulus* 3 10 30 1 10 10 3.3.6 Impact Strength Charpy, Notched (per condition)* 3 10 30 1 10 10 3.3.7 Heat Deflection Temperature* 3 2 6 1 2 2 3.3.8 Heat Aging Performance 3.3.8.1 Tensile Strength at Break, Change 1 5 5 3.
14、3.8.2 Impact Strength, Notched Charpy, Change 1 10 10 3.3.9 Flammability 1 5 5 3.4.1 Melt Flow Rate 1 1 1 3.4.2 Coefficient of Linear Thermal Expansion (per condition) 1 3 3 3.4.3 Mold Shrinkage 1 5 5 3.4.4 Melt Temperature 1 1 1 3.4.5 Impact Strength, Izod, Notched (per condition) 1 10 10 3.4.6 Poissons Ratio 1 2 2 3.4.7 Curves - FTIR - TGA - DSC - CLTE - Engineering Stress/Strain at 23 C 1 1 1 per test * For these requirements the 3 sigma value from the raw data is used to meet the requirements.
