1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 00 2011 08 08 Activated New specification K. Mueller, NA Controlled document at www.MATS Copyright 2011 Ford Global Technologies, LLC Page 1 of 5 POLYETHYLENE (PE), HIGH DENSITY MOLDING COMPOUND, WSS-M4D955-B NON VISIBLE EXTERIOR / UNDERB
2、ODY 1. SCOPE The material defined by this specification is a thermoplastic high density molding compound based on polyethylene. 2. APPLICATION This specification was released originally for material used for splash shields, underbody shields / aeroshields, compression molded or thermoformed applicat
3、ions, etc. 2.1 LIMITATIONS Material approved to WSS-M4D955-B does not contain UV stabilizers, therefore long term exposure to direct sunlight could cause chalking and loss of gloss. This material is susceptible to fluid stress cracking and high mold shrinkage. 3. REQUIREMENTS 3.1 STANDARD REQUIREMEN
4、TS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). Note: Many 4D resin specifications prior to 2011, identified certain requirements with the symbol (s), which indicated that the mean and +/-
5、 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 3.1.1 This specification is based on virgin materials, however mat
6、erials with recycled content as defined by WRS-M99P42-A1 (post-consumer and/or post industrial recyclates and repolymerised recycled materials) should be used whenever technically feasible and following all materials and PV testing required by Ford Materials Engineering. The use of regrind is permit
7、ted, for economic / environmental reasons, with compliance as indicated in WSS-M99P1111-A. 3.1.2 Performance Criteria: Parts using this specification shall meet the appropriate performance specification, WSS-M15P50-B/Latest. Parts must fulfill applicable SDS/CDS requirements. ENGINEERING MATERIAL SP
8、ECIFICATION WSS-M4D955-B Controlled document at www.MATS Copyright 2011, Ford Global Technologies, LLC Page 2 of 5 3.2 SAMPLE PREPARATION All tests specimens shall be prepared from compression molded sheets to approximately 200 x 200 x 4.0 +/- 0.2 mm unless otherwise specified. Preparation of compre
9、ssion molded sheets according to ISO 293, except; aluminum foil, 180 - 200 C molding temperature, 15 +/- 2 C/minute cooling rate. The values of this specification are based on unannealed specimens. See Tables 1 and 2 for the number of samples required. Specimens shall be as follows: Specimen A 150 m
10、inimum x 10 x 4.0 +/- 0.2 mm (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
11、Specimen H 50 +/- 1 mm diameter x 3.2 +/- 0.2 mm Specimen I 100 mm x 150 mm, min 3.3 MATERIAL PROPERTIES 3.3.1 Density 0.947 0.951 g/cm3 (ISO 1183, Method A) 3.3.2 Tensile Strength at Yield 23 MPa min (ISO 527-1 and ISO 527-2, Specimen A, 50 mm/minute test speed) 3.3.3 Elongation at Yield 9 % min (I
12、SO 527-1 and ISO 527-2, Specimen A, 50 mm/minute test speed) 3.3.4 Tensile Modulus 940 MPa min (ISO 527-1 and ISO 527-2, Specimen A, 1 mm/minute test speed) 3.3.5 Flexural Modulus 860 MPa min (ISO 178, Specimen D, 64 mm support span, 2 mm/minute test speed) 3.3.6 Impact Strength, Notched Charpy (ISO
13、 179-1/2, Specimen D) 3.3.6.1 At 23 +/- 2 C 16 kJ/m2 min Report Break Type 3.3.6.2 At -40 +/- 2 C 5 kJ/m2 min Report Break Type 3.3.6.3 At 80 +/- 2 C 6 kJ/m2 min Report Break Type ENGINEERING MATERIAL SPECIFICATION WSS-M4D955-B Controlled document at www.MATS Copyright 2011, Ford Global Technologies
14、, LLC Page 3 of 5 The test specimen must be conditioned for minimum of 6 hours at the above specified temperature prior to impact test. Low temperature testing shall be done within the cold chamber, if not possible, test may be conducted outside, but within 5 seconds. 3.3.7 Heat Deflection Temperatu
15、re 38 C min (ISO 75-1 & ISO 75-2, Specimen D, flatwise, 0.34 +/- 0.1 mm deflection. At 1.80 MPa) 3.3.8 Heat Aging Performance (ISO 188, except 150 +/- 50 air changes/h, 1000 h at 120+/- 2 C. After heat aging test specimens are to be conditioned in a desiccator for 3 - 5 h at 23 +/- 2 C. Unaged prope
16、rty values shall be determined at the time of the aged properties determination) 3.3.8.1 Tensile Strength at Yield, Change +/- 15% max (Test Method per para 3.3.2) 3.3.8.1 Impact Strength, Notched Charpy, Change - 25% max (Test Method per para 3.3.6.1, specimens to be notched before Heat Aging) 3.3.
17、9 Flammability (ISO 3795/SAE J369 Specimen B smooth surface) Burn Rate 100 mm/minute max 3.4 MATERIAL PROPERTIES REPORT ONLY Values are retained in Ford Materials Database . 3.4.1 Melt Flow Rate Report Value, (ISO 1133 190 C, 21.6 kg) g/10 minutes 3.4.2 Molding Shrinkage (Report method used, sample
18、size and value) After 48 h at 23 +/- 2 C Flow Report Value, % Cross Flow Report Value, % 3.4.3 Coefficient of Linear Thermal Expansion (ISO 11359-2) -30 +/- 2 C to 100 +/- 2 C Report Value, E-5 mm/mm/ C 3.4.4 Poissons Ratio Report Ratio (ISO 527-1/2, Specimen A 1 mm/minute test speed) ENGINEERING MA
19、TERIAL SPECIFICATION WSS-M4D955-B Controlled document at www.MATS Copyright 2011, Ford Global Technologies, LLC Page 4 of 5 3.4.5 Supplemental Information The following curves are to be submitted with the data packages: FTIR TGA DSC CLTE Engineering Stress/Strain Curves at 23 C 4.0 GENERAL INFORMATI
20、ON The information given below is provided for clarification and assistance in meeting the requirements of this specification. 4.1 TYPICAL PROPERTIES USING METHODS IN SECTION 3.4 Para. Test Typical Value Units 3.4.1 Melt Flow Rate (ISO 1133 190 C, 21.6 kg) 8 - 12 g/10 minute 3.4.2 Molding Shrinkage
21、(For specific method and sample size, contact Materials Engineering) After 48 h at 23 +/- 2 C Flow Across Flow 4.2 2.3 % % 3.4.3 Coefficient of Linear Thermal Expansion -30 +/- 2 C to 100 +/- 2 C 13.0 17.0 E-5 mm/mm/ C 3.4.4 Poissons Ratio 0.44 N/A 4.2 MATERIAL IDENTIFICATION FOR RECYCLING PURPOSES
22、PE-HD (ISO 1043/ 11469) ENGINEERING MATERIAL SPECIFICATION WSS-M4D955-B Controlled document at www.MATS Copyright 2011, Ford Global Technologies, LLC Page 5 of 5 Table 1: Minimum Sample Size Initial Approval New Manufacturing Location for Previously Approved Material Para. Test Minimum Lots Specimen
23、s per Lot Total Test Specimens Lots Specimens per lot Total Test Specimens 3.1 WSS-M99P1111-A, WSS-M15P50-B/Latest 3.3.1 Density 1 3 3 3.3.2 Tensile Strength at Yield* 3 5 15 1 5 5 3.3.3 Elongation at Yield* 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 Imp
24、act Strength Notched Charpy (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 Yield, Change 1 5 5 3.3.8.2 Impact Strength, Notched Charpy, Change 1 10 10 3.3.9 Flammability 1 5 5 3.4.1 Melt Flow Rate 3 1 3 1 1 1 3
25、.4.2 Molding Shrinkage 1 5 5 1 5 5 3.4.3 Coefficient of Linear Thermal Expansion 1 3 3 3.4.4 Poissons Ratio 1 5 5 3.4.5 Curves - IR - TGA - DSC - CLTE - Stress/Strain Curves 1 1 1 per test * For these requirements the 3 sigma value from the raw data is used to meet the requirements. 5.0 SUMMARY OF REVISIONS 2011 New Global Specification
