1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions 2007 03 14 Revised Inserted 3.0; Deleted 3.5 & 4 1994 12 15 Revised Revised and Retyped, was 18 pages 1978 04 21 Released SM/EQ 8341 TP Printed copies are uncontrolled Copyright 2007, Ford Global Technologies, LLC Page 1 of 9 MULTI-PLY DEADEN
2、ER PAD, MOLDED, ENGINE COMPARTMENT SK-M99G9520-A 1. SCOPE The material defined by this specification is a molded heat resistant multi-ply pad based on a EPDM or PUR heavy layer with or without fabric reinforcement and a polyurethane ether foam backing with surface skin. In the area of edges, the ass
3、embly is compressed. 2. APPLICATION The molded part was originally released for sound deadening in the engine compartment at the dash panel areas. The part is mechanically fixed to painted metal. 3. REQUIREMENTS Note: The material shall be conditioned for a minimum of 24 hours at 23 +/- 2 C and 50 +
4、/- 5% relative humidity prior to test and tested under the same conditions. 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). 3.1 HEAVY LAYER Note: If the finished par
5、t does not allow the preparation of plane specimens, the supplier is required to provide, together with the Initial Sample Report, specimens of the same material and equivalent manufacture used for the finished part. Samples for control and routine checks shall be submitted as required by Quality Co
6、ntrol. 3.1.1 Color Black or as specified on Engineering drawing 3.1.2 Density 2.2 +/- 0.3 g/cm3 (ASTM D 792, Method A-1) 3.1.3 Thickness 3.35 mm +/- 15% (Slide gauge) 3.1.4 Shore Hardness A 92 +/- 6 (ASTM D 2240, 15 s dwell) 3.1.5 Moisture Absorption, max 5% ENGINEERING MATERIAL SPECIFICATION SK-M99
7、G9520-A Printed copies are uncontrolled Copyright 2007, Ford Global Technologies, LLC Page 2 of 9 Test Method: 1) Weigh a test specimen of 100 x 100 mm nearest to 0.5 g. 2) Condition the test specimen in suspended position at 98 +/- 2% relative humidity and 38 +/- 2 C for 24 hours. 3) Immediately af
8、ter test, weigh the sample nearest to 0.5 g and determine increase of weight in % based on original weight. 3.1.6 Cold Resistance No cracking Test Method: 1) Place a steel ball of 38 mm diameter, mass 225 g and a 100 x 100 mm piece of material under test for 4 hours at -40 +/- 1 C in a cold box. 2)
9、Place the test piece horizontally on a base plate and normal to the direction of impact. 3) While still in the cold box, drop the steel ball to the middle of the test piece from a height of 1000 mm. 3.1.7 Tensile Strength (ASTM D 412, Die C, except test speed 150 mm/minute) 3.1.7.1 Original, min 300
10、 N/cm2 3.1.7.1.1 Elongation, min 15% 3.1.7.2 After Humidity Ageing, max -35% (48 h at 38 +/- 2 C and 98 +/- 2 % relative humidity) 3.1.7.3 After Heat Ageing, max -15% (14 d at 70 +/- 2 C, 1 h at room temperature) 3.1.7.4 After Immersion in Engine -15% Oil, max (48 h Oil No. 1 ASTM D 471 at room temp
11、erature) 3.1.8 Tear Strength, min 150 N/cm (ASTM D 624, Die C) 3.1.9 Stiffness of Heavy Layer According to Figure 1 Note: This test is only applicable if required on Engineering Drawing. ENGINEERING MATERIAL SPECIFICATION SK-M99G9520-A Printed copies are uncontrolled Copyright 2007, Ford Global Tech
12、nologies, LLC Page 3 of 9 Test Method: 1) Cut plane specimens 90 x 25 mm from the molded part or slab stock (see Note 3.1.). Thickness shall be between 3.0 mm and 3.6 mm. 2) Test according to ASTM D 747, except direct reading, 10 mm bending span, 0.4 Nm bending moment. 3) Determine the % of maximum
13、bending moment depending on the angular deflection within the limits of 0.175 to 1.396 rad and based on a 1 mm test specimen thickness as an average of 5 measurements. 3.2 PUR FOAM 3.2.1 Color Grey - black or as specified on Engineering Drawing. 3.2.2 Thickness 9 +/- 2 mm (Slide gauge) 3.2.3 Density
14、 80 - 130 kg/m3 (ASTM D 2406-68) 3.2.4 Hardness Index 1.2 - 2.2 N/cm2 (FLTM EU-BO 052-01, except specimens with heavy layer according to 3.4.9. (small tube). Total foam thickness between 18 mm and 21 mm. Calculate the hardness index as an average of 5 tests) 3.3 SURFACE SKIN 3.3.1 Adhesion of Surfac
15、e Skin to Foam The surface skin shall not be removed without being destroyed. Test Method: 1) Cut into the skin of the finished part an area of 25 x 200 mm with a razor blade. 2) Cover the area with tape according to SK-M3G9500-A and press down firmly. 3) Remove the tape from test piece in a tensile
16、 testing machine at an angle of 3.14 rad and a test speed of approx. 500 mm/minute. 3.4 ASSEMBLY REQUIREMENTS 3.4.1 Dimensions As specified on Engineering drawing. 3.4.2 Total Mass of Molded Part (kg) 5.3 +/- 0.7 or as specified on Engineering drawing. ENGINEERING MATERIAL SPECIFICATION SK-M99G9520-
17、A Printed copies are uncontrolled Copyright 2007, Ford Global Technologies, LLC Page 4 of 9 3.4.3 Heat Stability The finished part shall show no evidence of delamination, no visible shrinkage or distortion, respectively it shall not warp to an extent that would affect its use in ultimate assembly. F
18、urthermore, it shall show no change in appearance when compared with the original unaged part. Test Method: The finished part or a representative section of the part shall be mounted as in the vehicle and subjected to a temperature of 90 +/- 2 C in a mechanically convected air dry oven for 24 hours.
19、 Examine after cooling to room temperature. 3.4.4 Environmental Cycling The finished part shall show no evidence of delamination, no visible shrinkage or distortion respectively, it shall not warp to an extent that would affect its use in ultimate assembly. Furthermore, it shall show no change in ap
20、pearance when compared with the original unaged part. Test Method: The finished part or a representative section of the part shall be mounted as in the vehicle and subjected 3 times to the following cycle in the sequence indicated below: 3 h at 80 +/- 2 C 1 h at 23 +/- 2 C 3 h at - 40 +/- 2 C 1 h at
21、 23 +/- 2 C 16 h at 98 +/- 2% and 38 +/- 2 C relative humidity Examine after cooling to room temperature. 3.4.5 Cold Resistance after Ageing No cracking Test Method: 1) Expose the finished part or a representative section of it at 90 +/- 2 C for 120 hours. 2) After cooling to room temperature, store
22、 the part and a steel ball of 38 mm in dia and 225 g for 4 hours at -40 +/- 1 C in a cold box. 3) Place the test part with the heavy layer facing outward horizontally on a base plate and normal to the direction of impact. 4) While still in the cold box, drop the steel ball to the middle of the test
23、part from a high of 1000 mm. ENGINEERING MATERIAL SPECIFICATION SK-M99G9520-A Printed copies are uncontrolled Copyright 2007, Ford Global Technologies, LLC Page 5 of 9 3.4.6 Moisture Absorption, max 4% Test Method: 1) Cut from the finished part 100 x 100 mm pieces and weigh nearest to 0.5 g. 2) Cond
24、ition the part in suspended position at 98 +/- 2% relative humidity and 38 +/- 2 C for 24 hours. 3) After 1 hour at room temperature, weigh the specimen nearest to 0.5 g and determine increase of weight in % based on original weight. 3.4.7 Mildew Resistance The material shall be free from mildew and
25、 malodor. There shall be no visible changes evident after drying. Test Method: 1) Cut from finished part a piece of 100 x 100 mm and soak with distilled water. 2) Place test piece in a beaker glass of one liter capacity, and cover tightly with a lid. Store at 35 +/- 2 C for 14 days. 3.4.8 Resistance
26、 of Finished Part to Various Test Reagents No alteration of surface nor delamination of the assembly (slight color change permissible). Test Method: Rub the finished part surface (heavy layer) lightly with a cloth soaked with each of the following test reagents for 15 seconds. Use separate specimens
27、 for each test reagent. Examine specimens 2 hours after test at room temperature. Test Reagents: 1) Oil No. 1, ASTM D 471 2) Brake fluid, SA-M6C9101-A 3) Sulphuric Acid (10% by weight in distilled water 4) Ford Longlife coolant (50% by weight in distilled water) 5) Waxing compound, EU-M9G21-A 6) Dew
28、axing compound, EU-B5B8000-A 3.4.9 Sound Absorption According to Figure 2 (ASTM C 384) Note: Cut samples for measuring from the finished part. Samples for measuring in the small tube shall be die cut from the middle of the sample needed for the great tube after measuring the latter. Foam side shall
29、be facing to the sound source. 3.4.10 Acoustic Overall Efficiency (According to attached curve, Figure 3, FLTM BV 160-03, based on 12 +/- 0.5 mm total thickness and 5.5 +/- 0.5 kg/m2 total weight) ENGINEERING MATERIAL SPECIFICATION SK-M99G9520-A Printed copies are uncontrolled Copyright 2007, Ford G
30、lobal Technologies, LLC Page 6 of 9 3.4.11 Adhesion Heavy Layer/PUR-Foam The foam shall not be removed from the heavy layer without being destroyed. 3.4.12 Quality The material shall be of uniform quality, free from foreign material and properties detrimental to normal production use. It shall not c
31、ause excessive soiling of handlers in normal production use. 3.4.13 Health Hazards and Odor The material must not contain any ingredients (matter) which, under normal production conditions could lead to health hazards such as skin rash or irritation (dermatitis), irritation of the mucous membranes,
32、difficulties in breathing, etc. The material shall be free from objectionable odors both as received and after storage. 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 STORAGE STABILITY (From date
33、of receipt at Ford Motor Company) Minimum 6 months when stored between 5 C and 28 C. 5.2 HEIGHT IN STORAGE As recommended by supplier. ENGINEERING MATERIAL SPECIFICATION SK-M99G9520-A Printed copies are uncontrolled Copyright 2007, Ford Global Technologies, LLC Page 7 of 9 ENGINEERING MATERIAL SPECIFICATION SK-M99G9520-A Printed copies are uncontrolled Copyright 2007, Ford Global Technologies, LLC Page 8 of 9 ENGINEERING MATERIAL SPECIFICATION SK-M99G9520-A Printed copies are uncontrolled Copyright 2007, Ford Global Technologies, LLC Page 9 of 9
