1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2009 07 30 N-STATUS No Replacement Named Y. Bankowski, NA 2005 01 19 Revised Inserted 3.0; Deleted 3.2.9, 3.3 & 4 1977 09 21 Released ESH-M4D291-B & C R-110/CH8G-RD564380 Printed copies are uncontrolled Copyright 2009, Ford Global Technologies
2、, LLC Page 1 of 3 POLYURETHANE FOAM, RESTRICTED FLOW FLEXIBLE ESH-M4D291-C FORMED IN PLACE - WITH ADHESIVE BACKING POLYURETHANE FOAM, RESTRICTED FLOW FLEXIBLE ESH-M4D291-D DIE CUT - WITHOUT ADHESIVE BACKING POLYURETHANE FOAM, RESTRICTED FLOW FLEXIBLE ESH-M4D291-E DIE CUT - WITH ADHESIVE BACKING NOT
3、TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by these specifications is a flexible polyurethane foam offering restricted air flow due to a high percentage of closed cells and lack of interconnection between any remaining open cells. The foam may be heat formed (ESH-M4D291-B/C) or die cut
4、(ESH-M4D291-D/E). Heat formed foam may exhibit varying densities in the finished part. The finished part shall be furnished with a pressure sensitive adhesive and that adhesive shall be protected with a suitable release paper. The pressure sensitive adhesive is intended as an assembly aid and should
5、 only be used when the seal is mechanically retained in the final assembly. 2. APPLICATION These specifications were released originally for material used as gasketing for heater and air conditioning units. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and par
6、t producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.1 FOAM (as blown) 3.1.1 COLOR Charcoal 3.1.2 DENSITY, min 1.5 lb/ft3(24 kg/m3) (ASTM D 1564) 3.1.3 Tensile Strength, min 12 psi (83 kPa) (ASTM D 1564) Elongation, min 100% 3.1.4 Tear Resistanc
7、e, min 1.0 lb/in (175 N/m) (ASTM D 1564, Die “C“) 3.1.5 Compression Set, max 40% (ASTM D 1564, Method “B“, 2 x 2 in (50 x 50 mm) slab) ENGINEERING MATERIAL SPECIFICATIONESH-M4D291-C/D/EPrinted copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 2 of 3 3.1.6 Resistance to Deter
8、ioration No visible degradation (FLTM BO 012-01, Steps 2, 3, 4, 6, 7, 8) 3.1.7 Odor No offensive odor “as received“ or after heat aging 22 h at 125 +/- 3 C. 3.1.8 Cold Flexibility at -40 C Must pass Test Method: Condition 3 specimens, 2 x 8 in (50 x 200 mm) x slab thickness, for 5 h minimum in a col
9、d chamber maintained at -40 +/- 2 C. Similarly, condition a mandrel having a 2 in (50 mm) diameter. Without removing the foam or mandrel from the cold chamber, blend the foam specimens 180 around the mandrel in no less than 5 s. 3.1.9 Load Deflection, max 0.70 lb/in2(4.8 kPa) (ASTM D 1564, Suffix “D
10、“) 3.1.10 Ozone Rating ESB-M9P1-A (FLTM BP 101-01) 3.1.11 Cell Structure A homogeneous arrangement of fine cells when viewed at 10 magnification. 3.2 FINISHED PART (Testing may be performed on parts with the adhesive applied.) The foam shall exhibit the following properties. 3.2.1 Color Charcoal 3.2
11、.2 Density, max 7 lb/ft3(112 kg/m3) The test sample shall be taken from an area exhibiting the greatest reduction in volume. 3.2.3 Odor No offensive odor “as received“ or after heat aging 22 h at 125 +/- 3 C. 3.2.4 Cell Structure A homogeneous arrangement of the cells when viewed at 10 magnification
12、. 3.2.5 Water Impermeability Must pass (FLTM BO 112-03) 3.2.6 Adhesive Peel Strength, min (ASTM D 903, ESH-M4D291-C and ESH-M4D291-E only) As Received 40 oz/in (0.438 N/mm) After 2 h at room temperature) of width Oven Aged 40 oz/in (0.438 N/mm) (168 h at 88 +/- 2 C) of width ENGINEERING MATERIAL SPE
13、CIFICATIONESH-M4D291-C/D/EPrinted copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 3 of 3 Humidity Aged 40 oz/in (0.438 N/mm) (168 h, 38 +/- 2 C, of width 95 - 100% R.H.) Test Sample Preparation: For adhesive peel strength testing a standard test panel made of filled polyes
14、ter ESH-M3D18-B shall be used. Adhere at least 5 in (125 mm) of the adhesive backed foam to the panel using a rubber covered steel roller. The roller shall be 3.25 +/- 0.1 inches (82.6 +/- 2.5 mm) in diameter and 1.75 +/- 0.05 inches (44.5 +/- 1.3 mm) in width, covered with rubber approximately 1/4
15、inch (6.4 mm) in thickness having a durometer hardness of 80 +/- 5. The weight of the roller which applies pressure to the foam specimen shall be 4.5 +/- 0.1 lb (2.04 +/- 0.05 kg). The roller should be constructed so that the weight of the handle is not added to the weight of the roller during use.
16、Pass the roller without applying additional pressure over the gasket lengthwise, once in each direction at the rate of approximately 2 in (50 mm)/s. Allow 20 min before “as received“ testing. Apply masking tape to the surface of the foam to reduce the friction between the foam surfaces when the spec
17、imens are bent 180 in respect to each other. 3.2.7 Adhesive Peel Strength, Dead Load Test, min (ESH-M4D291-C and ESH-M4D291-E only) As received, room temperature 8 h At 50 +/- 2 C 4 h Test Method: Prepare foam (1/2 x 2 (13 x 50 mm) x slab thickness) to the panel specimens per para. 3.2.6. Suspend 1/
18、2 lb (227 g) weight vertically from the foam, holding the test panel horizontally in such a manner that the weight is “pulling“ the foam from the panel. 3.2.8 Release Film Separation (ASTM D 903, ESH-M4D291-C and ESH-M4D291-E only) The release film shall separate from the adhesive at a maximum initial pull value of 10 oz/in (0.109 N/mm) of width and the continuous pull value shall not exceed 5 oz/in (0.055 N/mm) of width.
