1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 01 2014.11.12 Revised See 5. Summary of Revision J.Herl EU 2009 10 14 Activated Initial release for B2 parameters B.Witkowski FNA/ T.Reilly FoE Controlled document at www.MATS Copyright 2014, Ford Global Technologies, LLC Page 1 of 6 ANTI
2、-FLUTTER, VISCOELASTIC EXPANDING PERFORMANCE WSS-M18P11-B2 REQUIREMENT, HEAT CURING 1. SCOPE This material defines the performance requirements for a die cut or extruded sealer that expands upon exposure to heat. This material can be supplied with or without a pressure sensitive adhesive coating (PS
3、A) or a release liner. 2. APPLICATION The specification was released originally for materials used in the body shop area as an anti-flutter material for roof bow and closure applications. The materials utilized are viscoelastic in nature and provide additional damping over traditional anti-flutter m
4、aterials commonly used in closure applications. This material can be supplied with or without an aggressive pressure sensitive adhesive which promotes adhesion to oily, uncleaned cold rolled and galvanized steel. This material expands during the electrocoat bake schedules per para. 3.4.5. Material c
5、ure is critical to long term material performance. It is recommended that time/temperature data packs be placed on a vehicle in the intended locations to determine the time at temperature requirements for a given application prior to release. The on-vehicle material time at electrocoat oven temperat
6、ures must fall within the cure window for the approved material. After release, periodic follow up time/temperature checks are recommended to insure cure performance is maintained. The Manufacturing Properties and Engineering Performance requirements defined in this specification are based on labora
7、tory sample testing and define the minimum acceptance criteria for adhesive/polymer material performance. The function and design requirements for the engineered part are defined by the component SDS (Sub-system Design Specification), key life test requirements, or vehicle program requirements. Prio
8、r to use, the engineered part must be evaluated under the intended application processing parameters. The choice of substrates, stamping lubricants, stamping and assembly plant processing conditions and specific design application may affect engineered part performance. Compliance with this specific
9、ation does not guarantee the engineered part will function for all potential applications on a vehicle. Selection of the appropriate material should therefore be based on jury evaluations or other NVH test procedures (such as door slam) as well as the required functional trial. 3. REQUIREMENTS 3.1 S
10、TANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements for Production Materials (WSS-M99P1111-A). 3.2 SYSTEM COMPATIBILITY Initial material approval was based on a specific material system which included the substrate, s
11、tamping lubricants and adhesive/polymer. The originally approved material system was oven cured using specific production process parameters. The choice of substrates, stamping lubricants, stamping and assembly plant processing conditions and specific design application may affect adhesive /polymer
12、/ engineered part performance. If any of these parameters are changed, the material performance must be validated using the new parameters. ENGINEERING MATERIAL SPECIFICATION WSS-M18P11-B2 Copyright 2014, Ford Global Technologies, LLC Page 2 of 6 3.3 DIMENSIONS As specified on the engineering drawin
13、g. 3.4 MATERIAL PROPERTIES 3.4.1 Density +/- 0.1 kg/m3 (ISO 845/ASTM D 3574,Test A, interior density) The density variation for any one supplier shall be +/- 0.1 kg/m3, based on the recorded density of their original approved production sample. 3.4.2 Water Absorption 5% max (FLTM BV 117-01, Method A
14、, 8 h soak time, cure material per paragraph 3.4.5) 3.4.3 Volume Expansion, Min 300% Max 700% (FLTM BV 108-02) The volume change variation for any one supplier shall be +/- 10%, based on the recorded volume change of their original approved production sample. 3.4.4 Volatile Organic Compounds (VOC) C
15、ontent +/- 0.05 kg/L (EPA Method 24, Procedure B) The VOC Content variation for any one supplier shall be +/- 10%, based on the recorded VOC Content of their original approved production sample. 3.4.5 Material Cure Schedule (FLTM BV 150-05, Min and Max cure cycles, per respective region). Record cho
16、sen cycle in the Intial Sample Report. Critical performance characteristics shall include, but are not limited to, the following: Volume Expansion, para 3.4.3 Adhesion, para 3.5.6 3.5 MANUFACTURING PROPERTIES 3.5.1 Differential Scanning Calorimetry Report (20 +/- 1 mg sample size, 5 C/min heating ra
17、te, 25 - 250 C Temperature range, submit Heat Flow vs. Temperature curve) Report onset of reaction 3.5.2 Bridging 3 mm max (SAE J243, ADS-9, Section 3.3, Method D, non-flow fixture, substrates per para 4.1, bake conditions per para 3.4.5) 3.5.3 Phosphate Wash Resistance Pass (FLTM BV 116-03, 2000psi
18、, 23 C, substrates per para 4.1) Panel Preparation: Cut a 100 x 150 strip at production thickness of and apply a 300 x 300 mm panels prepared for each substrate per para 4.1. Pass a 2.2 kg roller over samples per ASTM D1000. Condition at 23 +/- 2 C for 1 hour prior to performing wash test. ENGINEERI
19、NG MATERIAL SPECIFICATION WSS-M18P11-B2 Copyright 2014, Ford Global Technologies, LLC Page 3 of 6 3.5.4 Electrocoat Compatibility Pass (FLTM BV 119-01, use current production paints as identified by Materials Engineering) Shall not contaminate electrocoat primer bath or cause electrocoat film irregu
20、larities. 3.5.5 Uncured Adhesion Pass Test Method: Prepare four panels for each substrate per para 5.1. Cut four 100 x 150 x 4 mm strips of the material and apply to four 300 x 300 mm panels prepared for each substrate per para 5.1. Pass a 2.2 kg roller over samples per ASTM D 1000. Invert two panel
21、s immediately after material application and condition for 72 h at 40 C. Observe for peeling or lifting of adhesive/polymer from panel or slump or sag between attachments, as appropriate. Stand the remaining two panels vertically immediately after material application and condition for 72 h at 40 C.
22、 Observe for peeling or lifting of material from panel or slump or sag between attachments, as appropriate. 3.5.6 Adhesion Characteristics Pass Test Method: Apply two 200 mm length ribbons of material to each of two 0.89 x 100 x 300 mm steel per para 4.1 and condition panels at 23 +/-2 C for 1 h. Ba
23、ke on panel at min and max bake per para 3.4.5. Position panels in a horizontal attitude during bake. After bake, condition panels at 23 +/-2 C for 4 h min. Evaluate adhesion by inserting the top of a sharp spatula under the end of the material strip. Grasp the tab of sealer and attempt to peel 180.
24、 The material shall not be removable in a continuous coherent film. Observe for any indication that the material fails to adhere to the substrate or is brittle. 3.5.7 Release Paper Adherence and Removal Pass (Pressure Sensitive/Tacky Materials only) The release paper must remain attached to the adhe
25、sive/polymer surface during shipment and handling. It must be easily removed from the adhesive/ polymer without part distortion or paper tear at ambient plant conditions (7 to 38 C). Final approval for the release paper may be part and plant specific. Release paper information shall be noted in the
26、supplier control plan. 3.5.8 Odor Pass Shall be free from objectionable odors as determined by the manufacturing facility, both as received and after storage. 3.5.9 Storage Stability 6 Months Heat and moisture will accelerate aging. The materials shall be stored in sealed packages (if so recommended
27、 by the supplier) away from all sources of heat and moisture. The self life of the material shall be 6 months from date of manufacture. Ambient plant conditions may fluctuate. Materials shall be evaluated for local plants conditions to determine plant specific requirements for temperatures and suppl
28、ier shall provide testing of plant conditions within their control plan. Deviations from the shelf life requirement shall be identified and concurred upon by the plant and noted in the supplier control plan. When materials are stored at temperatures below 15 C, they shall be conditioned at room temp
29、erature and checked for acceptable green state adhesion prior to use . Application properties are optimized with adequate conditioning of the material. Supplier shall demonstrate minimum green state adhesion (if applicable for PSA) and note minimum storage temperature. ENGINEERING MATERIAL SPECIFICA
30、TION WSS-M18P11-B2 Copyright 2014, Ford Global Technologies, LLC Page 4 of 6 Critical performance characteristics to evaluate for shelf life stability shall include, but are not limited to, the following: Volume Expansion, para 3.4.3 Uncured Adhesion, para 3.5.5 Adhesion Characteristics, para 3.5.6
31、Release Paper Adherence and Removal, para 3.5.7 - Cold slam resistance (3.6.3) on uncured material. 3.6 ENGINEERING REQUIREMENTS 3.6.1 Vertical Expansion (Ramp Expansion, SAE J1918, Method #3, cure material per para 3.4.5) 3.6.1.1 Minimum bake 10 min 3.6.1.2 Maximum bake 10 min 3.6.2 Corrosion Resis
32、tance Test Method: Place a 39 cm2 area section of production material on each of two 150 x 75 mm steelpanels, substrates per para. 4.1. Cover the material with an identical steel panel and clamp in position for close contact. Cure test panels in a mechanical convection oven for prior to e-coat requi
33、rements per FLTM BV 150-05, one for min and one for max bake. Remove clamps and subject the cured assemblies to the following exposure then separate assemblies and evaluate: After Ford 00.00-L-467, 6 weeks The material shall protect the test panel from corrosion. Disregard the area 10 mm from the ed
34、ges of test panel. Under the material and at the border line of material edges there shall be no visible corrosion, flaking, or any evidence of loss of adhesion of the material 3.6.3 Cold Slam Resistance (FLTM BV 101-02, Procedure E, 300 x 300 mm panel for each substrate per para 4.1, 4 mm cured mat
35、erial thickness, condition for 4 h minimum at -40 +/- 2 C prior to testing, test at -40 C for 10 slams) Sample preparation: Apply a 150 x 150 mm piece of material on a 300 x 300 mm panel. Material thickness to be determine by minimum expansion assumption used for engineering part design. Pass a 2.2
36、kg roller per ASTM D 1000 over sample within 15 minutes of patch application. Cure between aluminum plates lined with release paper or in a fixture to maintain a 4 mm cured material thickness. Initial Test after 30 days at 50 +/- 2 C and 90 +/- 5% relative humidity Test after 30 cycles APGE (FLTM BI
37、 123-03, manual cycle, report after 10, 20 and 30 cycles) ENGINEERING MATERIAL SPECIFICATION WSS-M18P11-B2 Copyright 2014, Ford Global Technologies, LLC Page 5 of 6 3.6.4 Peel Adhesion 0.5 N/ mm min (ASTM D 1876, substrates per para 4.1, material cure per para 4.2, 76.2 mm overlap, 2.0 +/- 0.4 mm ad
38、hesive bondline, condition for 30 minutes at specified 23 +/- 2 C prior to test.) All materials shall show 100% cohesive failure; report failure mode. 254 mm/min. pull rate. Report load between 25 and 75 mm cross-head travel. 3.7 SPONGE AND CELL STRUCTURE AFTER CURE Pass Shall exhibit uniform cell s
39、tructure with no large voids. A natural skin formation shall result from the cure cycle. The sponge shall have good resilience under finger pressure. Test Method: Cross sectional observation of the sponge shall be made by cutting through the skin and sponge mass of a cured specimen. The sponge syste
40、m shall be visually examined. 3.8 MATERIAL CONSISTENCY Pass Shall be a smooth, homogeneous mixture free from foreign materials and properties detrimental to normal production operations. 3.9 PACKAGING Supplier shall be responsible advising on any packaging related issues to this material, including
41、but not limited to any concerns for nesting, compression of material, etc. Plant shall review suppliers control plan to address this issue. 3.10 FUNCTIONAL APPROVAL Materials being evaluated for approval to this specification shall be subjected to a production trial. Functional trial results must be
42、 approved by the affected assembly operation and Design Engineering. Results shall be made available to Materials Engineering prior to material approval and release. This functional approval shall validate at a minimum effectiveness of the material damping 3.11 DAMPING PROPERTIES (ISO 6721-4) Suppli
43、er shall furnish report demonstrating loss factor vs frequency and Youngs modulus vs frequency at target bake conditions. Minimum Damping Loss Factor Targets Temperature (C) 1Hz 10Hz 101Hz -20 0.1 0.1 0.1 -10 0.2 0.2 0.2 0 0.6 0.4 0.2 10 1.0 1.0 0.6 20 0.5 0.8 1.0 40 0.2 0.3 0.6 60 0.2 0.15 0.3 3.12
44、 FOGGING Fog Number 70 min (SAE J1756, 3 h at 100 C heating, 21 C cooling plate, post test conditioning 16 h) Formation of clear film, droplets or crystals is cause for rejection. ENGINEERING MATERIAL SPECIFICATION WSS-M18P11-B2 Copyright 2014, Ford Global Technologies, LLC Page 6 of 6 4. GENERAL IN
45、FORMATION 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 SUBSTRATES Cold rolled steel as specified on engineering drawing. Panel thickness: 0.8 mm u
46、nless otherwise specified. Note: If any other steel, such as precoated with Zn, Zn/Ni, Duplex, galvanized, galvanealed, etc. is used for manufacturing, the adhesive has to be tested according to this specification on these substrates Currently released HD, EG, and CRS materials, 0.8mm thickness. Ref
47、erence specifications WSD-M1A333-A2,WSD-M1A333-A2, nominal 0.8 mm thickness, coated per WSS-M1P94-A to coating weight 50G50G-EL and 50G50G-HD, panels Electrocoated steel panels prepared per WSS-M3P1-D using current production paints as specified by Materials Engineering, materials to be tested at lo
48、wer coating weights as applicable. All related materials used for approval of adhesive/polymer according to this specification, eg. Paint materials or metallic substrates, shall be noted in the initial sample report of the adhesive/polymer/ part. 4.2 OIL COMPATIBILITY & REFERENCE OIL All materials r
49、eleased to this specification must be applicable to oiled surfaces, including corrosion protection oil, wash oils, pre-lubricants, draw oils, hot melts etc. The approved products for use are listed in the applicable approved source list (contact local materials engineering for details). The supplier must confirm the compatibility of the adhesive/sealer material to these specific coating materials in the appropriate lab tests listed in para 3 and - prio
