1、 ENGINEERING MATERIAL SPECIFICATION SEALER, HIGH HEAT EXPANSION PERFORMANCE WSS-M18P11-B 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
2、sensitive adhesive coating (PSA) or a release liner. 2 APPLICATION The specification was released originally for materials used in the body shop area for sealing openings in sheet metal surfaces. This material can be supplied with or without an aggressive pressure sensitive adhesive which promotes a
3、dhesion to oily, uncleaned cold rolled and galvanized steel. This material expands during the electrocoat bake schedules per para. 4.2. Material cure 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
4、determine the time at temperature requirements for a given application prior to release. The on-vehicle material time at electrocoat oven temperatures must fall within the cure window for the approved material. After release, periodic follow-up time/temperature checks are recommended to insure cure
5、performance is maintained. The Manufacturing Properties and Engineering Performance requirements defined in this specification are based on laboratory sample testing and define the minimum acceptance criteria for adhesive/polymer material performance. The function and design requirements for the eng
6、ineered part are defined by the component SDS (Sub-system Design Specification), key life test requirements, or vehicle program requirements. Prior to use, the engineered part must be evaluated under the intended application processing parameters. The choice of substrates, stamping lubricants, stamp
7、ing and assembly plant processing conditions and specific design application may affect engineered part performance. Compliance with this specification does not guarantee the engineered part will function for all potential applications on a vehicle. 3. REQUIREMENTS 3.1 APPROVED SOURCES This specific
8、ation requires the use of approved sources. Only the sources identified on the Ford Approved Source List (ASL) can be used when this specification is listed on the drawing, CAD file, or other documents. The list of approved sources is located within Ford at or available externally through a Ford Ma
9、terials Engineer. 3.2 CONDITIONING AND TEST CONDITIONS All test values are based on material conditioned for not less than 24 h prior to testing in a Date Action Revisions Rev. 04 2016 03 29 Revised 3.7.2. Editorial - clarified test method and added diagram. J. Herl, EU 2015 11 02 Revised See 5 summ
10、ary of revision B. Witkowski, C. Orr, NA 2003 01 27 Activated J. Crist, NA Controlled document at www.MATS Copyright 2015, Ford Global Technologies, LLC Page 1 of 8 ENGINEERING MATERIAL SPECIFICATION WSS-M18P11-B controlled environment of 23 +/- 2 C and 50 +/- 5% relative humidity. Testing of the ma
11、terial should occur in the conditioning environment or soon after removal. 3.3 SYSTEM COMATIBILITY Initial material approval was based on a specific material system which included the substrate, stamping lubricants and adhesive/polymer. The originally approved material system was oven cured using sp
12、ecific production process parameters. The choice of substrates, stamping lubricants, stamping and assembly plant processing conditions and specific design application may affect adhesive /polymer / engineered part performance. If any of these parameters are changed, the material performance must be
13、validated using the new parameters. 3.4 DIMENSIONS Cross sections/dimensions for tape shall be specified on the engineering drawing. 3.5 MATERIAL PROPERTIES 3.5.1 Density +/- 10%(ISO 845/ASTM D 3574, Test A, interior density) The density variation for any one supplier shall be +/- 10%, based on the
14、recorded density of their original approved production sample. 3.5.2 Water Absorption (FLTM BV 117-01, Method A, 8 h soak time, cure material per paragraph 4.2) 300 800% Volume Expansion 5% max 800% or greater Volume Expansion 8% max 3.5.3 Volume Expansion 300% min (FLTM BV 108-02, material cure per
15、 para 4.2) The volume change variation for any one supplier shall be +/- 10%, based on the recorded volume change of their original approved production sample. 3.5.4 Volatile Organic Compounds (VOC) Content +/- 0.05 kg/L (EPA Method 24, Procedure B) The VOC Content variation for any one supplier sha
16、ll be +/- 10%, based on the recorded VOC Content of their original approved production sample. 3.5.5 Cure Requirements Report (Define the process cure window for material cure, Report minimum and maximum time at temperature requirements to define performance boundaries) Copyright 2015, Ford Global T
17、echnologies, LLC Page 2 of 8 ENGINEERING MATERIAL SPECIFICATION WSS-M18P11-B Critical performance characteristics shall include, but are not limited to, the following: Volume Expansion, para 3.4.3 Adhesion, para 3.5.6 3.6 MANUFACTURING PROPERTIES 3.6.1 Differential Scanning Calorimetry Report (20 +/
18、- 1 mg sample size, 5 C/min heating rate, 25 - 250 C temperature range, submit Heat Flow vs. Temperature curve) Report onset of reaction 3.6.2 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 4.2) 3.6.3 Phosphate Wash Resi
19、stance (For PSA/Tacky only) (FLTM BV 116-03, 2000psi, 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
20、 for 1 hour prior to performing wash test. 3.6.4 Electrocoat Compatibility Must Pass (FLTM BV 119-01, use current production paints as identified by Materials Engineering) Shall not contaminate electrocoat primer bath or cause electrocoat film irregularities. 3.6.5 Uncured Adhesion (PSA/Tacky only)
21、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. Copyright 2015, Ford Global Technologies, LLC Page 3 o
22、f 8 ENGINEERING MATERIAL SPECIFICATION WSS-M18P11-B Invert two panels 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 im
23、mediately after material application and condition for 72 h at 40 C. Observe for peeling or lifting of material from panel or slump or sag between attachments, as appropriate. 3.6.6 Adhesion Characteristics Test Method: Apply two 200 mm length ribbons of material to each of two 0.89 x 100 x 300 mm s
24、teel per para 4.1 and condition panels at 23 +/-2 C for 1 h. Bake on panel at min and max bake per para 4.2. 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 mat
25、erial strip. Grasp the tab of sealer and attempt to peel 180. 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. 3.6.7 Release Paper Adherence and Removal (Pressure Sensitive/Tacky Materials
26、only) The release paper must remain attached to the adhesive/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 sp
27、ecific. Release paper information shall be noted in the supplier control plan. 3.6.8 Odor 3.6.8.1 Manufacturing Facility Shall be free from objectionable odors as determined by the manufacturing facility, both as received and after storage. 3.6.8.2 FLTM BO 131-03, Method D Rating 3 max 3.6.9 Storage
28、 Stability 6 Months Heat and moisture will accelerate aging. The materials shall be stored in sealed packages (if so recommended 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 when stored at temperatures below 32
29、C. Ambient plant conditions may fluctuate between 15 C and 38 C. Materials shall be evaluated for local plants conditions to determine plant specific requirements for temperatures in excess of 32 C. Deviations from the shelf life requirement shall be identified and concurred upon by the plant and no
30、ted in the supplier control plan. When materials are stored at temperatures below 23 C, they shall be conditioned at room temperature for a minimum of 24 hours prior to application. Application Copyright 2015, Ford Global Technologies, LLC Page 4 of 8 ENGINEERING MATERIAL SPECIFICATION WSS-M18P11-B
31、properties are optimized with adequate conditioning of the material. 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 Release
32、Paper Adherence and Removal, para 3.5.7 3.7 ENGINEERING REQUIREMENTS 3.7.1 Vertical Expansion (Ramp Expansion, SAE J1918, Method #3, cure material per para 4.2) 3.7.1.1 Minimum bake Report 3.7.1.2 Maximum bake Report 3.7.2 Corrosion Resistance Test Method: Place production material on two 150 x 75 m
33、m steel panels for each substrate per para. 4.1. Place material over a 40 x 10 mm area and cover with an identical steel panel and clamp in position for close contact. Cure one test panel at min bake and one at max bake in a mechanical convection oven per the e-coat requirements per FLTM BV 150-05.
34、Remove the clamps and subject the cured assemblies to 6 weeks of cyclic corrosion exposure per Ford 00.00-L-467 then separate the steel panel assemblies and evaluate: The material shall protect the test panel from corrosion. Disregarding all areas 10 mm from the edges of the material, there shall be
35、 no visible corrosion or any lack of adhesion of the material to the substrates or e-coat. Test Panel 10 mm Evaluation Area 10 mm 10 mm 10 mm Material Copyright 2015, Ford Global Technologies, LLC Page 5 of 8 ENGINEERING MATERIAL SPECIFICATION WSS-M18P11-B 3.7.3 Cold Slam Resistance (FLTM BV 101-02,
36、 Procedure E, 300 x 300 mm panel for each substrate per para 4.1, 4 mm cured material 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 determi
37、ne by minimum expansion assumption used for engineering part design. Pass a 2.2 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 6 weeks
38、Ford 00.00-L-467 3.8 SPONGE AND CELL STRUCTURE AFTER CURE Shall exhibit uniform cell structure 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
39、made by cutting through the skin and sponge mass of a cured specimen. The sponge system shall be visually examined. 3.9 MATERIAL CONSISTENCY Shall be a smooth, homogeneous mixture free from foreign materials and properties detrimental to normal production operations. 3.10 PACKAGING The material shal
40、l be supplied in sealed packages and material blocking is not permitted during container shipping or storage 3.11 FUNCTIONAL APPROVAL Materials being evaluated for approval to this specification shall be subjected to a production trial. Functional trial results must be approved by the affected assem
41、bly operation and Design Engineering. Results shall be made available to Materials Engineering prior to material approval and release. Copyright 2015, Ford Global Technologies, LLC Page 6 of 8 ENGINEERING MATERIAL SPECIFICATION WSS-M18P11-B 3.12 TESTING REQUIREMENTS Test Material Approval Part Appro
42、val Annual Test Lot Testing Density (ISO 845/ASTM D3574) X X X Water Absorption (FLTM BV 117-01, Method A) X X Volume Expansion (FLTM BV 108-02) X X X VOC Content (EPA Method 24, Procedure B) X Cure Requirements X X Differential Scanning Calorimetry (DSC) X Bridging (SAE J243, ADS-9, Section 3.3, Me
43、thod B) X Phosphate Wash Resistance (FLTM BV 116-03) PSA/Tacky X Electrocoat Compatibility (FLTM BV 119-01) X Uncured Adhesion (PSA/Tacky Only) X X X Adhesion Characteristics X X Release Paper Adherence & Removal (PSA/Tacky Only) X X X Odor X Storage Stability X Vertical Expansion (Ramp Expansion, S
44、AE J1918, Method 3) X X Corrosion Resistance (6 weeks Ford 00.00-L-467) X X Cold Slam Resistance (FLTM BV 101-02, Procedure E) X Sponge & Cell Structure After Cure X X Packaging X X Functional Approval X X 4. GENERAL INFORMATION The information given below is provided for clarification and assistanc
45、e in meeting the requirements of this specification. Contact for questions concerning Engineering Material Specifications. 4.1 SUBSTRATES WSD-M1A333-A2, nominal 0.8 mm thickness, panels prepared with typical lubricants and at applications levels as specified by Materials Engineering. WSD-M1A333-A2,
46、 nominal 0.8 mm thickness, coated per WSS-M1P94-A to coating weight 60G60G-EL and 60G60G-HD, panels prepared with typical lubricants and at applications levels as specified by Materials Engineering. WSS-M2A174-A1 or A2, nominal 2.0 mm thickness, panels prepared with typical lubricants and at applica
47、tions levels as specified by Materials Engineering. Electrocoated steel panels prepared per WSS-M3P1-D using current production paints as specified by Materials Engineering. All related materials used for approval of adhesive/polymer according to this specification, eg. Paint materials or metallic s
48、ubstrates, shall be note in the initial sample report of the adhesive/polymer/ part. Copyright 2015, Ford Global Technologies, LLC Page 7 of 8 ENGINEERING MATERIAL SPECIFICATION WSS-M18P11-B 4.2 MATERIAL CURE SCHEDULES (FLTM BV 150-05, use table for appropriate regional vehicle assembly site, cure m
49、aterial per material application “Prior to Electrocoat“, min and max bake, condition at 23 +/- 2 C for 1 h min. prior to testing) 4.3 APPROVAL OF MATERIALS Suppliers desiring approval of their materials shall first obtain an expression of interest from Purchasing, Design or Product Development, and Materials Engineering. The supplier shall submit a completed copy of their laboratory test reports, signed by a qualified and authorized representative of the test facility, demonstrat
