1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev. 0 2014 12 01 Released J. Herl, EU Controlled document at www.MATS Copyright 2014, Ford Global Technologies, LLC Page 1 of 4 REPAIR PERFORMANCE, SEALER, 2K EXPANSION WSS-M18P11-B4 1. SCOPE The material defined by this specification is a f
2、ast curing, two part, foamed-in-place polyether polyurethane foam. This foam is formulated to be free of chlorofluorocarbons (CFC). 2. APPLICATION This specification was released originally for material used after paint process on protected (e-coated) substrates for repair to seal cavities against w
3、ind noise and dust. 3. REQUIREMENTS 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 fo
4、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 material must be evaluated under the intended application processing parameters. The choice of substrates and assembly plant proces
5、sing conditions and specific design application may affect material performance. Compliance with this specification does not guarantee the engineered part will function for all potential applications on a vehicle. 3.1 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part produce
6、rs 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, and adhesive/polymer. The originally approved material system was using specific p
7、roduction process parameters. The choice of substrates 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 validated using the new parameters. 3.3
8、 MATERIAL PROPERTIES 3.3.1 Density 35 kg/m3 +/- 10% (ISO 845/ASTM D 3574, Test A, interior density) The density variation for any one supplier shall be +/- 1 kg/m3, based on the recorded density of their original approved production sample. 3.3.2 Compression Strength 20 N/cm +/-10%(ASTM D 1621,10% d
9、eflection, sample size 50x50x50mm) ENGINEERING MATERIAL SPECIFICATION WSS-M18P11-B4 Copyright 2014, Ford Global Technologies, LLC Page 2 of 4 3.3.3 Volume Expansion, at 23C 1500-2500% % Expansion = (V2-V1) / V1 x 100 V1=Volume of Material in Can V2=Volume of free expanded fully cured Material 3.3.4
10、Volatile Organic Compounds (VOC) Content +/- 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. 3.3.5 Cure Requirements at 23C (From application until end of chemical
11、reaction) Tack free time 10-20 min Curing time 30-60 min 3.4 MANUFACTURING PROPERTIES 3.4.1 Water Absorption, (FLTM BV 117-01, Method A, 8 h soak time) Cut 2% max Uncut 1% max 3.4.2 Bridging 3 mm max (SAE J243, ADS-9, Section 3.3, Method D, non-flow fixture, substrates per para 4.1) 3.4.3 Uncured Ad
12、hesion Test Method: Prepare four panels for each substrate per para 4.1. Apply a 10mm bead of material Stand the panels vertically immediately after material application and condition for 2 h at 23 C. Observe for peeling or lifting of material from panel or slump or sag, as appropriate. 3.4.4 Adhesi
13、on Characteristics 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 2 h. Evaluate adhesion by inserting the top of a sharp spatula under the end of the material strip. Grasp the tab of sealer and atte
14、mpt 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. 3.4.5 Aged Weight Loss 7% max Test Method: Weigh a 100 x 100 x 25 mm sample to the nearest mg (W1). Expose for 24 h at 120
15、+/- 2 C in a mechanical oven. Remove sample and reweight (W2) after 30 minutes in a desiccator. ENGINEERING MATERIAL SPECIFICATION WSS-M18P11-B4 Copyright 2014, Ford Global Technologies, LLC Page 3 of 4 % Weight Loss = (W1 - W2) / W1 x 100 3.4.6 Odor Rating 3 max (FLTM BO 131-03, cured Material) 3.4
16、.7 Storage Stability 9 Months min 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 shelf life of the material shall be 6 months from date of manufacture when stored at tempera
17、tures below 32 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 t
18、he plant and noted 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 properties are optimized with adequate conditioning of the material. Critical performance c
19、haracteristics to evaluate for shelf life stability shall include, but are not limited to, the following: Volume Expansion, para 3.3.3 Uncured Adhesion, para 3.4.3 Adhesion Characteristics, para 3.4.4 3.5 ENGINEERING REQUIREMENTS 3.5.1 Flammability (ISO 3795 / SAE J369) Burn Rate 100 mm/min. max 3.5
20、.2 Corrosion Resistance not required This Material is not intended to prevent metal sheets against corrosion 3.5.3 Cold Slam Resistance (FLTM BV 101-02, Procedure E, 300 x 300 mm panel for each substrate per para 4.1, 20 mm cured material thickness, condition for 4 h minimum at -40 +/- 2 C prior to
21、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 determined by minimum expansion assumption used for engineering part design. ENGINEERING MATERIAL SPECIFICATION WSS-M18P11-B4 Copyright 2014, Ford Global
22、Technologies, LLC Page 4 of 4 Cure between aluminum plates lined with release paper or in a fixture to maintain a 20 mm cured material thickness. 3.6 SPONGE AND CELL STRUCTURE AFTER CURE Shall exhibit uniform cell structure with no large voids. A natural skin formation shall result from the cure cyc
23、le. 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 system shall be visually examined. 3.7 MATERIAL CONSISTENCY Shall be a smooth, homogeneous
24、 mixture free from foreign materials and properties detrimental to normal production operations. 3.8 PACKAGING The two material components shall be supplied in packaging that allows proper mixing via aerosol dispense, cartridge, or other dispense item that will not require use to adjust ratio of mat
25、erials. 3.9 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 assembly operation and Design Engineering. Results shall be made available to Materials Engineering prior t
26、o material approval and release. 4. GENERAL 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 SUBSTRATES Electro-coated steel panels prepared per WSS-M3P1-D using current production paints as specified by Materials Engineering. 5. SUMMARY OF REVISIONS
