1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions 2006 11 27 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.15 & 4 1992 01 28 Released C10188961 P. Thomas Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 1 of 2 POLYURETHANE (PUR) FOAM, PRESSURE SENSITIVE WSD
2、-M99D57-B ADHESIVE, LOW PERMEABILITY 1. SCOPE The material defined by this specification is a flexible polyester polyurethane (PUR) foam with a pressure sensitive adhesive offering restricted air flow properties. 2. APPLICATION This material was originally released as gasketing for heaters and air c
3、onditioning units in transit. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.4 COLOR Grey or as specified on Engineering Drawing 3.5 CELL COUNT, m
4、in 50 cells/25 mm 3.6 DENSITY, min 35 - 50 kg/m3 (ISO 845/ASTM D 3574, Test A) 3.7 ADHESION STRENGTH, min (ASTM D 1000, Method A, except use an enamelled panel according to FLTM BI 103-02) 3.7.1 Original 15 N/25 mm width (20 minutes after bonding) 3.7.2 After Ageing 15 N/25 mm width (14 Days at 70 +
5、/- 2 C) 3.7.3 After Humidity Ageing, Change, max -10% (24 h at 38 +/- 2 C and 98 +/- 2% Relative Humidity) 3.8 TENSILE STRENGTH, min 150 kPa (ISO 1798/ASTM D 3574, Test E, 50 mm bench marks, 5 specimens minimum) 3.9 ELONGATION AT BREAK, min 150% (Test according to para 3.8) ENGINEERING MATERIAL SPEC
6、IFICATION WSD-M99D57-B Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 2 of 2 3.10 TEAR STRENGTH, min 175 N/m (ISO DIS 8067/ASTM D 3574, Test F, 50 mm/minute test speed) 3.11 COMPRESSION SET, max 15% (ISO 1856, Method A/ASTM D 3574, Test D, Ct calculation, 22 h at
7、70 C, 3 specimens minimum, at 40% deflection) 3.12 COMPRESSION LOAD DEFLECTION 3 - 5 kPa (ISO 3386/1 at 40% compression, 100 x 100 x 50 mm specimen size, 100 +/- 20 mm/minute test speed, 3 specimens minimun) 3.13 RESTRICTION TO AIR FLOW RESIDUAL PRESSURE, min 10 kPa Test apparatus shall consist of a
8、 7.6 L pressure reservoir with a 6.4 mm I.D. pipe at least 150 mm long extending from the top outlet. Atop the 6.4 mm I.D. pipe shall be a standard 25 mm pipe flange with a 29 mm diameter opening and a recess of at least 15 mm. The pressure reservoir must be equipped with an air pressure gauge havin
9、g a 70 kPa total scale graduated in 0.7 kPa units. Test Method: Place a test piece of new uncompressed foam 150 x 150 x 25 mm over the 25 mm pipe flange. Place a piece of 1.6 mm mesh screening on top of the test piece, bolt another 25 mm pipe flange to the one attached to the pressure reservoir, wit
10、h the test piece and screening in between. Tighten the bolts until each is secure, but avoid tightening any one more than the other. Introduce a pressure of 35 kPa into the reservoir, allow the pressure to build up slowly. Turn off the air supply. Observe the pressure drop over a 60 second period. A
11、t the end of this period, residual pressure in the reservoir must be a minimum of 10 kPa. 3.14 WATER ABSORPTION, max 280% (At 75% compression, by weight) Test Method: 25 x 25 x 150 mm samples to be weighed and then compressed to 25% of their original thickness. The samples are then submerged in a 30
12、0 x 300 x 250 mm tank under 125 mm of water at 23 +/- 2 C using 6.4 mm pitch mesh screening to keep samples positioned. At the completion of 24 hours immersion remove the samples and allow to drain horizontally for 5 +/- 0.5 minutes on 6.4 mm pitch mesh screening. Re-weigh and calculate average absorption for 3 samples: % Water Absorption = (B - A)/A) x 100 A = Original weight B = Weight after immersion
