1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev. 0 2013 01 04 Released T. Nover, M. Corley, FOE Controlled document at www.MATS Copyright 2013, Ford Global Technologies, LLC Page 1 of 5 THERMOPLASTIC ELASTOMERIC MOLDING COMPOUND WSS-M4D981-B1 PAINTED AIRBAG COVER 1 SCOPE The material d
2、efined by this specification is a thermoplastic polyolefinic elastomer. 2 APPLICATION This specification was released originally for painted airbag covers. The first surface must be painted with ultraviolet and heat resistant paint (WSS-M15J15-A1) Parts produced with this material must also meet the
3、 appropriate airbag System Design Specification (SDS). 3 REQUIREMENTS 3.1 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements for Production Materials (WSS-M99P1111-A). Many 4D resin specifications prior to 2011, ide
4、ntified certain reguirement with the symbol (s), which indicated that the mean and +/- 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. 3.1.1 Materia
5、ls used in interior applications must meet the requirements outlined in WSS-M99P2222-D1/Latest, Performance, Vehicle Interior Environment Quality Material/ Component Requirements. Data must be included in material submission package. 3.1.2 Performance Criteria: Parts using this specification shall m
6、eet the appropriate performance specifications, WSS-M2P188-A1/ Latest. 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 molding conditions defined in ISO 1873-2. No ann
7、ealing is allowed. See Tables 1 and 2 for the number of samples required. Specimens shall be as follows: Specimen A 150 minimum 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, 8
8、0 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 diameter x 3.2 +/- 0.2 mm Specimen I 100 mm x 150 mm, min ENGINEERING MATERIAL SPECIFICATION WSS-M4D981-B1 Copyright 2013, Ford Global Technologies, LLC Pag
9、e 2 of 5 3.3 MATERIAL PROPERTIES 3.3.1 Density 0,87 0,93 g/cm3 (ISO 1183, Method A) 3.3.2 Hardness, Durometer D 40 - 54 (ISO 868, 15 s dwell) 3.3.3 Tensile Strength at Break 7 - 20 MPa min (ISO 527-1 and ISO 527-2, Specimen A, 50 mm/minute test speed) 3.3.4 Elongation at Break 300 % min (ISO 527-1 a
10、nd ISO 527-2, Specimen A, 50 mm/minute test speed) 3.3.5 Flexural Modulus 220 MPa min 3.3.6 (ISO 178, Specimen D, 64 mm support span, 2 mm/minute test speed) 3.3.7 Heat Aging Performance (ISO 188, 150 +/- 50 air changes/h, 1000 h at 110+/- 2 C, After heat aging test specimens are to be conditioned i
11、n a desiccator for 3 - 5 h at 23 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination) 3.3.7.1 Tensile Strength at break, Change +/- 25% max (Test Method per para 3.3.3) 3.3.7.2 Elongation at break, Change +/- 25% max (Test Method per para 3.3.3), 3.3.
12、8 Odor Rating 3 max (FLTM BO 131-03, Variant C, Specimen G) 3.3.9 Fogging Photometric (SAE J1756, Specimen F, 3 h at 100 C heating, 21 C cooling plate, post test conditioning 16 h) Fog Number 70 min Formation of clear film, droplets or crystals is cause for rejection. 3.3.10 Flammability (ISO 3795/S
13、AE J369, Specimen B, smooth surface) Burn Rate 100 mm/minute max 3.4 MATERIAL PROPERTIES REPORT ONLY Values are retained in Ford Materials Database . ENGINEERING MATERIAL SPECIFICATION WSS-M4D981-B1 Copyright 2013, Ford Global Technologies, LLC Page 3 of 5 3.4.1 Melt Flow Rate Report Value (ISO 1133
14、 230C, 2,16 kg) 3.4.2 Molding Shrinkage (Report method used, sample size and value) After 48 h at 23 +/- 2 C Flow Report Value, % Cross Flow Report Value, % 3.4.3 Post Shrinkage (Report method used, sample size and value Separate specimens required for each test, report total shrinkage) After 48 h a
15、t 80 C Flow Report Value, % Cross Flow Report Value, % After 30 minutes at 120 C Flow Report Value, % Cross Flow Report Value, % 3.4.4 Coefficient of Linear Thermal Expansion (ISO 11359-2, -30 +/- 2 C to Tg, Tg to 120 +/- 2 C) Flow Report Value, E-5 mm/mm/ C Cross Flow Report Value, E-5 mm/mm/ C 3.4
16、.5 Impact Strength Multiaxial (ASTM D 3763, Impact velocity: 6,6 m/s Specimen E, smooth surface injection molded specimen) Max Load Energy at 23 +/- 2 C Report J Energy Absorbed 100% Ductile Failure Max Load Energy at -40 +/- 2 C Report J Energy Absorbed 100% Ductile Failure Report test data for 23
17、+/- 2 C, and continue until a minimum of 80% ductile are observed. A ductile failure is defined as a crack that does not radiate more than 10 mm from the center of the impact point. Test specimens must be conditioned for minimum of 6 h at test temperature prior to impact testing. Low temperature tes
18、ting shall be conducted within the same environmental chamber as the clamp mechanism of the impact device. Specimens can be transported from the conditioning environment to the testing environment, provided the transfer is within 5 seconds. 3.4.6 Poissons Ratio Report Ratio (ISO 527-1 and ISO 527-2,
19、 Specimen A, 1 mm/minute test speed) ENGINEERING MATERIAL SPECIFICATION WSS-M4D981-B1 Copyright 2013, Ford Global Technologies, LLC Page 4 of 5 3.4.7 Supplemental Information The following curves are to be submitted with the data packages: FTIR TGA DSC CLTE Engineering Stress/Strain at 23 C 4 GENERA
20、L INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. Contact for questions concerning Engineering Material Specifications. 4.1 TYPICAL PROPERTIES USING METHODS IN SECTION 3.4 Para. Test Typical Value Units 3.4.1 Me
21、lt Flow Rate g/10 minutes 3-10 3.4.2 Molding Shrinkage After 48 h at 23 +/- 2 C Flow Cross Flow 0,6-2 0,9-2 % % 3.4.3 Post Shrinkage (Values show total shrinkage) - After 48 h at 80 +/- 2 C Flow Cross Flow - After 30 minutes at 120 C Flow Cross Flow 1,1-1,3 1,1-1,3 1,0-1,2 1,0-1,2 % % % % 3.4.4 Coef
22、ficient of Linear Thermal Expansion Flow Cross Flow 7,6 7,9 E-5 mm/mm/ C E-5 mm/mm/ C 3.4.5 Impact Strength Muliaxial Max Load Energy at 23+/2C Max Load Energy at -40+/2C 11-40 11-60 J J 3.4.6 Poissons Ratio 0,4 N/A 4.2 MATERIAL IDENTIFICATION FOR RECYCLING PURPOSES PP+EPDM (ISO 11469) ENGINEERING M
23、ATERIAL SPECIFICATION WSS-M4D981-B1 Copyright 2013, 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 Specimens per Lot Total Test Specimens Lots Specimens per lot Total Test Spe
24、cimens 3.1 WSS-M99P1111-A WSS-M99P2222-C1/Latest Total Carbon, Hazardous Substances, Formaldehyde, Acraldehyde, Acetaldehyde (See below for Odor and Fogging) 1 1 1 per test 3.3.1 Density 1 3 3 1 3 3 3.3.2 Hardness, Durometer D 1 5 measurements 1 3.3.3 Tensile Strength at Maximum Load 3 5 15 1 5 5 3.
25、3.4 Elongation at Maximum Load 3 5 15 1 5 5 3.3.5 Flexural Modulus* 3 10 30 1 10 10 3.3.7 Heat Aging Performance 3.3.7.1 Tensile Strength at break, Change 1 5 5 3.3.7.2 Elongation at break Change 1 10 10 3.3.8 Odor 1 9 9 3.3.9 Fogging Photometric 1 3 3 3.3.9 Flammability 1 5 5 3.4.1 Melt Flow Rate 3
26、 1 3 1 1 1 3.4.2 Mold Shrinkage 1 5 5 1 5 5 3.4.3 Post Shrinkage 1 5 5 1 5 5 3.4.4 Coefficient of Linear Thermal Expansion (per condition) 1 3 3 3.4.5 Impact Strength, Multiaxial (per condition)* 3 10 30 1 10 10 3.4.6 Poissons Ratio 1 2 2 3.4.7 Data Plots FTIR TGA DSC CLTE 1 1 1 per test * For these
27、 requirements the 3 sigma value from the raw data is used to meet the requirements. Table 2: Minimum Color Property Testing 5 SUMMARY OF REVISIONS Para. Test Lots Specimens per Lot Total Test Specimens Color Test Direction 3.3.3 Tensile Strength at maximum load 1 5 5 As directed by Materials Engineering 3.3.5 Flexural Modulus 1 10 10 As directed by Materials Engineering 3.3.8 Odor 1 9 9 As directed by Materials Engineering 3.3.9 Flammability 1 5 5 Every color
