1、A.C.N. 006 893 232 GM Holden Limited Engineering Department MATERIAL SPECIFICATION NUMBER SHEET RELEASE REVISION : HN 2145 1 of 3 October, 1994 November, 2005 NAME: FOAM HIGH TEMPERATURE RESISTANT THIS DOCUMENT MUST NOT BE REPRODUCED. IF USED IN RELATION TO THE COMPANYS PRODUCTS THE RECIPIENT IS RES
2、PONSIBLE TO CONFIRM THE DOCUMENT ISSUE DATE IS STILL VALID. FORM : I:CentralLaboratoryStandardForms MaterialSpecificationMatspec.doc 1. SCOPE The material described in this specification is a sound absorbing foam capable of withstanding engine compartment temperature. The material may be attached to
3、 components by a pressure sensitive adhesive, in which case the adhesive must also withstand the same temperatures. For engine bay applications the foam must have a tear resistant facing to protect the foam from undue fluid absorption and to optimise sound absorption via optimised flow resistance. 2
4、. PROPERTIES 2.1 Sound Absorption Impedance Tube Method (AS1935) Each grade of material must have a minimum sound absorption coefficient. This shall be determined by the standing wave method (AS 1935). Refer to Table for the minimum sound absorption and Noise Reduction Coefficients (N.R.C.) for each
5、 grade of material with no air space. Frequency (Hertz) Statistical Sound Absorption Coefficient Grade 1 6mm Grade 2 12mm 250 0.10 500 0.07 0.30 800 0.13 1000 0.41 1250 0.35 0.52 2000 0.66 0.74 2500 0.80 3200 0.62 4000 0.85 5000 0.35 0.80 NRC 0.388 2.2 Flammability (GM6090M) The material must be cla
6、ssed as self extinguishing when tested in the horizontal position in accordance with GM6090M (B4-A). A.C.N. 006 893 232 GM Holden Limited Engineering Department MATERIAL SPECIFICATION NUMBER SHEET RELEASE REVISION : HN 2145 2 of 3 October, 1994 November, 2005 NAME: FOAM HIGH TEMPERATURE RESISTANT TH
7、IS DOCUMENT MUST NOT BE REPRODUCED. IF USED IN RELATION TO THE COMPANYS PRODUCTS THE RECIPIENT IS RESPONSIBLE TO CONFIRM THE DOCUMENT ISSUE DATE IS STILL VALID. FORM : I:CentralLaboratoryStandardForms MaterialSpecificationMatspec.doc 2. PROPERTIES (continued) 2.3 Density (ISO 845) The density of the
8、 foam shall be a minimum of 32 kg/m3. 2.4 Tear Resistance (ISO 8067) The tear resistance of the foam shall be 400 N/m minimum. 2.5 Adhesion The adhesive must support the foam during an overhead bake of 150 oC. Take a 50 mm square section of foam and adhere the foam to the underside of an engine cove
9、r. Place in a convection oven at 150 oC for 30 min. with the engine cover uppermost. Inspect the assembly when cool. Foam must remain adhered to the engine cover. 2.6 Airflow Resistance (ASTM C522) The material as a foam/resistive layer composite shall have an airflow resistance between 800 and 1200
10、 mks Rayls. 3. APPROVAL, INSPECTION AND REJECTION Refer HN 1000, Clauses A and C. 4. HAZARDOUS MATERIALS Refer HN 1000, Clause H. 5. RESTRICTED AND REPORTABLE SUBSTANCES Refer HN 1000, Clause J. A.C.N. 006 893 232 GM Holden Limited Engineering Department MATERIAL SPECIFICATION NUMBER SHEET RELEASE R
11、EVISION : HN 2145 3 of 3 October, 1994 November, 2005 NAME: FOAM HIGH TEMPERATURE RESISTANT THIS DOCUMENT MUST NOT BE REPRODUCED. IF USED IN RELATION TO THE COMPANYS PRODUCTS THE RECIPIENT IS RESPONSIBLE TO CONFIRM THE DOCUMENT ISSUE DATE IS STILL VALID. FORM : I:CentralLaboratoryStandardForms Mater
12、ialSpecificationMatspec.doc 6. APPROVED SUPPLIERS AND MATERIALS Material known to meet the full requirements of this specification: Grade APPROVED SUPPLIER APPROVED MATERIAL 1 INC Corporation FAFAHR 06 ALTERNATE NAME DECI-FOAM F 06 BKA ADHESIVE - DUROFAR 480-1760 7. REFERENCES AS 1935 ASTM C522 GM60
13、90M HN 1000 ISO 8067 ISO 845 8. REVISIONS October, 1996 - Point 2.5 altered - Addition of the Hazardous Materials and Restricted Chemical Clauses July, 2000 - Approved material and supplier added. - Editorial and Formatting corrections. - References section added. November, 2005 - Updated Section 1
14、“SCOPE”. Inclusion of details for engine bay applications. - Revised section 2 “PROPERTIES” - Added Grade 2 requirements to section 2.1 “Sound Absorption Impedance Tube Method” - Added Test Method Identification Number to sections 2.1 “Sound Absorption Impedance Tube Method”, 2.3 “Density”, 2.4 “Tear Resistance” and 2.5 “Adhesion”. - Changed reference standard in section 2.2 “Flammability” - Added section 2.6 “Airflow Resistance” Prepared by: Scott Houston
