FORD WSS-M18P19-A-2015 SEALER HEAT EXPANDING LOWER EXPANSION HIGH TEMPERATURE CURE NON WELDABLE PERFORMANCE REQUIREMENT TO BE USED WITH FORD WSS-M99P1111-A .pdf
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1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 01 2015 11 02 Revised See 5 summary of revision B. Witkowski, C. Orr (NA) 2006 05 26 Activated J. Crist Controlled document at www.MATS Copyright 2015, Ford Global Technologies, LLC Page 1 of 11 SEALER, HEAT EXPANDING, LOWER EXPANSION, HI
2、GH TEMPERATURE WSS-M18P19-A CURE, NON WELDABLE, PERFORMANCE REQUIREMENT 1. SCOPE The material defines the performance requirements for a die cut, injection molded, or extruded sealer that expands upon exposure to heat. This material can be supplied with or without a pressure sensitive adhesive coati
3、ng (PSA) or a release liner. 2. APPLICATION This specification was originally released for materials used to isolate bodyside strainers, seal fuel fillers, and roof bows from exterior sheet metal panels. The material can be supplied with or without an aggressive pressure sensitive adhesive which pro
4、motes adhesion 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 locati
5、ons to 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 insur
6、e cure performance is maintained. The Manufacturing Properties and Engineering Performance requirements defined in these specifications are based on laboratory sample testing and define the minimum acceptance criteria for adhesive/polymer material performance. The function and design requirements fo
7、r the engineered 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 lubrican
8、ts, stamping 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 Material specification re
9、quirements are to be used for initial qualification of materials. 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 this specification is listed on the drawing, CAD file, or other document
10、s. The list of approved sources is located within Ford at or available externally through a Ford Materials Engineer. ENGINEERING MATERIAL SPECIFICATION WSS-M18P19-A Copyright 2015, Ford Global Technologies, LLC Page 2 of 11 3.2 CONDITIONING AND TEST CONDITIONS All test values are based on material
11、conditioned for not less than 24 h prior to testing in a controlled environment of 23 +/- 2 C and 50 +/- 5% relative humidity. Testing of the material should occur in the conditioning environment or soon after removal. 3.3 SYSTEM COMPATIBILITY Initial material approval was based on a specific materi
12、al system which included the substrate, stamping 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
13、application may affect adhesive/polymer/engineered part performance. If any of these parameters are changed, the material performance must be 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
14、.5.1 Density +/- 10% (ISO 845/ASTM D 3574, cured per para 4.2, Test A, interior density) The density variation for any one supplier shall be +/- 10%, based on the recorded density of their original approved production sample. 3.5.2 Water Absorption 5% max (FLTM BV 117-01, Method A, 8 h soak time, cu
15、re material per paragraph 4.2) 3.5.3 Volume Expansion (FLTM BV 108-02, material cure per para 4.2) 3.5.3.1 Minimum bake 200 - 450% 3.5.3.2 Maximum bake 200 - 450% The volume change variation for any one supplier shall be +/- 25%, based on the recorded volume change of their original approved product
16、ion sample. 3.5.4 Volatile Organic Compounds (VOC) Content, kg/L Report (EPA Method 24, Procedure B) The VOC Content variation for any one supplier shall be +/- 0.05 kg/L, based on the recorded VOC Content of their original approved production sample. 3.5.5 Hardness, Durometer “A or D“ Report (ASTM
17、D 2240, reading after 15s, cure per para. 4.2) ENGINEERING MATERIAL SPECIFICATION WSS-M18P19-A Copyright 2015, Ford Global Technologies, LLC Page 3 of 11 3.5.6 Cure Requirements Report (Define the process cure window for material cure, Report minimum and maximum time at temperature requirements to d
18、efine performance boundaries) Critical performance characteristics shall include, but are not limited to, the following: Volume Expansion, para 3.5.3 Adhesion, para 3.6.6 Shear Adhesion Strength para. 3.7.3.1 3.6 MANUFACTURING PROPERTIES 3.6.1 Differential Scanning Calorimetry Report (10 +/- 1 mg sa
19、mple 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, cure conditions per para 4.2) 3.6.3 Sag Resistance 3 mm (FLTM BV
20、 118-01, substrates per para. 4.1, cure conditions per para 4.2) 3.6.4 Phosphate Wash Resistance (For PSA/Tacky only) (FLTM BV 116-03, 2000 psi, 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 substr
21、ate per para 5.1. Pass a 2.2 kg roller over samples per ASTM D1000. Condition at 23 +/- 2 C for 1 hour prior to performing wash test. 3.6.5 Electrocoat Compatibility Must Pass (FLTM BV 119-01, use current production paints as identified by Materials Engineering) Shall not contaminate electrocoat pri
22、mer bath or cause electrocoat film irregularities. ENGINEERING MATERIAL SPECIFICATION WSS-M18P19-A Copyright 2015, Ford Global Technologies, LLC Page 4 of 11 3.6.6 Uncured Adhesion (PSA/Tacky only) Test Method: Prepare four panels for each substrate per para 4.1. Cut four 100 x 150 x 4 mm strips of
23、the material and apply to four 300 x 300 mm panels prepared for each substrate per para 4.1. Pass a 2.2 kg roller over samples per ASTM D1000. 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 slu
24、mp or sag between attachments, as appropriate. Stand the remaining two panels vertically immediately 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. 3.6.7 Adhesion Characteristics Te
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