1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev. 00 2016 04 24 Released C. Orr NA Controlled document at www.MATS Copyright 2016, Ford Global Technologies, LLC Page 1 of 7 PREFORMED SEALER TAPE, HEAT CURING, PAINTABLE WSS-M18P20-A1 PERFORMANCE REQUIREMENT 1. SCOPE The specification def
2、ines the performance requirements for a paintable, hot-melt or heat-curing thermosetting sealer supplied as a discrete part. 2. APPLICATION This specification was released originally for material used in applications, such as sealing floor pan holes or the roof ditch joint. The material is applied o
3、n the sealer deck after vehicle electrocoat, and it is suitable for use on vehicle interiors and must be paintable with topcoat enamels presenting an acceptable appearance free from tackiness, checks and porosity. The material can be heat staked to a metal clip which is inserted into the floor pan h
4、ole, and it can be tacky, dry, magnetic or some combination thereof. This material is not recommended for visible areas. 3. REQUIREMENTS 3.1 APPROVED SOURCES This specification requires the use of approved sources. Only the sources identified on the Ford Approved Source List (ASL) can be used when t
5、his 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 Materials Engineer. This specification concerns materials that require toxicology review and approved sources should be reviewed wi
6、thin each region. A globally approved material will have 4 approved source listings to reflect the toxicology reviews in each region. 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 controlled environment of 23 +/- 2
7、 C and 50 +/- 5% relative humidity. Testing of the material should occur in the conditioning environment or soon after removal. 3.3 INFRARED SPECTROPHOTOMETRY AND/OR THERMAL ANALYSIS IR spectra and thermograms from initial material approval shall constitute the reference standard and shall be kept o
8、n file at the designated material laboratory. The material supplier shall ensure that all future material supplied to the specification shall produce IR spectra and thermograms that correspond to the reference standard when tested under the same conditions. 3.4 MATERIAL PROPERTIES 3.4.1 CONSISTENCY
9、(Needle Penetration) (ASTM D1321, 100 g total load) 3.4.1.1 As Received 3.4.1.2 Aged, 72 h at 50 C ENGINEERING MATERIAL SPECIFICATION WSS-M18P20-A1 Copyright 2016, Ford Global Technologies, LLC Page 2 of 7 The consistency tolerance for any one supplier shall be +/- 1.0 mm based on the recorded consi
10、stency of their originally approved production sample. 3.4.2 SOLIDS 98% min (ASTM D2834, except heat at 102 +/- 3 C for 3 h in a mechanical convection oven) 3.4.3 ASH (Based on solids weight) +/- 5% (ISO 3541, Method A, 760 +/- 30 C) The ash tolerance for any one supplier shall be +/- 5% based on th
11、e recorded percent ash of the originally approve production sample 3.4.4 Specific Gravity (Uncured material) +/- 0.1 (ASTM D297, water displacement method) The specific gravity tolerance for any one supplier shall be +/- 0.1 based on the recorded specific gravity of the originally approve production
12、 sample 3.5 MANUFACTURING PROPERTIES 3.5.1 FLOW PROPERTIES Test Method: Apply a preformed sealer tape section 150 x 25 x 2.0 +/- 0.1 mm to the centerline of two 300 x 100 x 0.90 mm electrocoated steel panels per para 4.2. Preheat the panels for 15 minutes at 110 +/- 2 C prior to sealer application.
13、This will heat stake the sealer to the panel. Allow the panels to cool at 23 +/- 2 C for 30 minutes. Place the electrocoated panels in a mechanical convection oven for 15 minutes at 150 +/- 2 C. Place one panel at a 45 angle with the 150 mm dimension of sealer in a horizontal attitude and the second
14、 panel in a horizontal position (flat). Remove panels from oven, cool to room temperature, and measure the amount of flow. Save panels for para 3.6.3. Acceptance Criteria: Horizontal 5 mm max 45 5 mm max The flow property tolerance for any one supplier shall be +/- 0.5 mm based on the recorded flows
15、 of their originally approved production sample. 3.5.2 Curl Test, (non-PSA/non-Tacky only) Test Method: Apply a section of preformed sealer tape 150 x 25 +/- 0.1 to three 300 x 100 x 0.80 mm electrocoated steel panels per para 4.1. Preheat panels for 15 minutes at 110 +/- 2C prior to sealer applicat
16、ion. This will heat stake the sealer to the panel. Allow the panels to cool at 23 +/- 2C for 30 minutes. Apply all regionally available traditional and 3 wet paint systems, utilizing all combinations of minimum and maximum primer and top coat cure cycles outlined in FLTM BV 150-05, by region. Record
17、 any curling of the film after initial paint application. Using a razor blade, cut through the paint film at one side edge and the top edge of each ENGINEERING MATERIAL SPECIFICATION WSS-M18P20-A1 Copyright 2016, Ford Global Technologies, LLC Page 3 of 7 sample Subject the panel to an additional bas
18、ecoat/clearcoat cure cycle, using the same time at temperature as each panels original cure cycle. Remove from oven and observe for evidence of curling. Repeat this procedure once more for a total of 3 basecoat/clearcoat bakes. Acceptance Criteria: No curl allowed after 2 rebakes. Report any evidenc
19、e of curling and the paint system used. Any evidence of curling is considered a failure for this test. 3.5.3 Bridging 10 mm min 3.5.3.1 Overlap Joint Test Method: Prepare two test figures as shown in Figure 1 using electrocoated panels prepared per para 4.1. FIGURE 1. BRIDGING TEST FIXTURE PREPARATI
20、ON ENGINEERING MATERIAL SPECIFICATION WSS-M18P20-A1 Copyright 2016, Ford Global Technologies, LLC Page 4 of 7 Apply a 1.8 mm thick and 18 mm wide ribbon of material to each test fixture. Position ribbon such that it is centered over the panel edge. Cure one test fixture at the minimum bake schedule
21、per FLTM BV 150-05. Subject the second test fixture to the maximum bake schedule per FLTM BV 150-05. Allow test fixtures to cool for 1 hour at 23 +/- 2C. Inspect test fixture and measure the maximum gap the material fails to bridge. Any evidence of tearing will constitute a failure. 3.6 ENGINEERING
22、REQUIREMENTS 3.6.1 ADHESION Shall not be removed in a continuous coherent film when subjected to the following environments. There shall be no evidence of corrosion underneath the applied sealer tape after corrosion testing. 3.6.1.1 Normal, 24 h at 23 +/- 2 C 3.6.1.2 12 weeks to Ford 00.00-L-467 (su
23、bstrates per para 4.1, oven cure per para 4.2) 3.6.1.3 Thermal Cycle 4 h at 90 +/- 2C 4 h at 38 +/- 1C and 95 - 100% relative humidity 16 h at -30 +/- 1C 4 h at 38 +/- 1C and 95 - 100% relative humidity 4 h at 90 +/- 2C 16 h at -30 +/- 1C Sample preparation: SAE J1600, Method B, with the following m
24、odifications: Apply a 75 x 200 mm strip of material along the center line of two electrocoated steel panels prepared per para 4.1. Cure the material per bake schedules in FLTM BV 150-05 per region to be used. Report failure mode. 3.6.2 SHEAR ADHESION 0.5 MPa min and (SAE J1523, 0.75 mm bondline thic
25、kness, 100% cohesive failure 6.5 cm2 overlap, substrate per para 4.1, 25 mm/min crosshead speed, material cure per FLTM BV 150-05) 3.6.3 LOW TEMPERATURE RESISTANCE No adhesion failure (FLTM BV 101-02) Place the panels prepared in para 3.5.1 in the slamming apparatus. Condition 4 h at - 30 +/- 2 C. T
26、he panel shall be slammed a total of six times. ENGINEERING MATERIAL SPECIFICATION WSS-M18P20-A1 Copyright 2016, Ford Global Technologies, LLC Page 5 of 7 3.6.4 MANDREL BEND TEST at 23 +/- 2 C No loss of adhesion (FLTM BV 122-01, 50 mm diameter, material bake schedule per FLTM BV 150-05, heat age te
27、st specimen 14 days at 70 +/- 1 C before test, substrate per para 4.1) 3.6.5 COMPATIBILITY WITH PRODUCTION PAINTS Test Method: Apply a 25 x 200 x 2 mm strip of material to an electrocoated steel panel per para 4.1. Test with white and red basecoats, and appropriate primer, without clearcoat. Apply t
28、he primer and basecoats to the appropriate target film build, per paint manufacturers guidelines. Cure without sealer pre-gel bake per Section 4.2 at Minimum/Minimum and Maximum/Maximum cure conditions for traditional 2-bake coatings and Minimum/Maximum cure conditions for 3 wet systems. With modera
29、te pressure, touch the painted sealer with a white cotton swab. Examine the panel for transfer of fibers or paint. Acceptance Criteria: Evaluate, subjected to the following conditions 3.6.5.1 Initial 3.6.5.2 Heat Age 14 d at 102 C No tackiness, staining, discoloration, pin holing from sealer outgass
30、ing or other deleterious effects on topcoats. Note: Evidence of any defects as stated above shall be reviewed with Global Paint Engineering and Materials Engineering. 3.7 STORAGE STABILITY The material shall be stored at temperatures below 40 C away from all sources of heat and sunlight from the dat
31、e of receipt at Ford Motor Company. Heat greatly accelerates aging. Under these storage conditions, the shelf life of the material shall be a minimum of 3 months from the date of manufacture. When these materials are stored at temperatures below 23 C, they shall be conditioned at room temperature pr
32、ior to application. Adequate conditioning permits the material to obtain its optimum application properties. Material may not be used after the expiration date unless the supplier has given written documentation to Materials Engineering and the affected Manufacturing Plant that the material conforms
33、 to requirements outlined in the material control plan. The supplier shall also indicate in the letter the number of additional days the material will be usable. 3.8 QUALITY Material shall be a homogeneous product. It shall be consistent in color and texture, and free from objectionable odors during
34、 normal storage. It shall be suitable for the intended application. 3.9 FUNCTIONAL APPROVAL / LINE TRIAL Materials being evaluated for approval to this specification shall be subjected to a production trial. Functional trial results must be approved by the affected assembly operation and Design Engi
35、neering. Results shall be made available to Materials Engineering prior to material approval and release. ENGINEERING MATERIAL SPECIFICATION WSS-M18P20-A1 Copyright 2016, Ford Global Technologies, LLC Page 6 of 7 3.10 TESTING REQUIREMENTS Test Material Approval Functional Trial Annual Consistency (A
36、STM D 1321) X X Solids (ASTM D 2834) X X Ash (ISO 3541, Method A) X X Specific Gravity (ASTM D 297) X X Flow Properties (Vertical & Horizontal) X X Curl Test X X Bridging X X Adhesion (Normal, 12 weeks Ford 00.00-L-467, Thermal Cycle) X Shear Adhesion (SAE J1523) X X Low Temperature Resistance (FLTM
37、 BV 101-02) X Mandrel Bend Test (23C, FLTM BV 122-01) X Compatibility with Production Paints X X X Storage Stability X Quality X Functional Approval X 4. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. Co
38、ntact for questions concerning Engineering Material Specifications. 4.1 SUBSTRATES Nominal panel dimensions are 0.8 x 100 x 300 mm. Electrocoat primed steel panel: Use current production paints as identified by Paint Engineering. 4.2 MATERIAL CURE SCHEDULES Per FLTM BV 150-05 table according to the
39、 region to be used. 4.3 MATERIAL APPLICATION PARAMETERS Report Material application parameters should be defined as tacky or dry and magnetic or non-magnetic to define material use. 4.4 APPROVAL OF MATERIALS Suppliers desiring approval of their materials shall first obtain an expression of interest
40、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, demonstrating full compliance with all the requirements of the Material Sp
41、ecification. Tested material samples must be available for review upon request and kept for a minimum of one year. Upon request, the supplier will review the associated quality control documents (Process Failure Mode and Effects Analysis, Control Plans, Certification testing) with Ford. 4.5 SUPPLIER
42、S ONGOING RESPONSIBILITY All materials must be equivalent in all characteristics to the material upon which approval was originally granted. ENGINEERING MATERIAL SPECIFICATION WSS-M18P20-A1 Copyright 2016, Ford Global Technologies, LLC Page 7 of 7 Prior to making any changes to the material original
43、ly approved, whether or not such changes affect the materials ability to meet the specification requirements, the supplier shall notify the affected Supplier Technical Assistance (STA), Purchasing, and Materials Engineering activities of the proposed changes (with reasons) by submission of a complet
44、ed Suppliers Request for Engineering Approval, SREA. For parts and components using Ford Engineering Material Specifications, all samples tested to the specifications for Design Verification (DV), Production Verification (PV) and Production Part Approval Process (PPAP) sign off must be kept until Jo
45、b 1. 4.6 RESTRICTED SUBSTANCE MANAGEMENT STANDARD Substance restrictions imposed by regulations or Company direction applies to the materials addressed by this document. The restrictions are identified in the Restricted Substance Management Standard WSS-M99P9999-A1 which is updated yearly. It is the suppliers responsibility to comply with this standard on a continuing basis through IMDS and or GMAP reporting. 5. SUMMARY OF REVISIONS
