Fibre-Kork
Scope
FIBRE-KORK is a composition cork and fibre glue-glycerine impregnant gasket material manufactured and tested to the below-listed specifications. FIBRE-KORK consists of a special base fibre containing 40% granulated cork particles by volume. FIBRE-KORK is saturated with a glue-glycerine impregnant which makes the sheet impervious to oil, water and gasoline. The incorporation of the cork with the fibre makes FIBRE-KORK a soft compressible material adaptable for gasket application with low internal pressures.
Fibre-Kork
Scope
FIBRE-KORK is a composition cork and fibre glue-glycerine impregnant gasket material manufactured and tested to the below-listed specifications. FIBRE-KORK consists of a special base fibre containing 40% granulated cork particles by volume. FIBRE-KORK is saturated with a glue-glycerine impregnant which makes the sheet impervious to oil, water and gasoline. The incorporation of the cork with the fibre makes FIBRE-KORK a soft compressible material adaptable for gasket application with low internal pressures.
Certification
FIBRE-KORK is certified to meet the below listed specifications:
MIL-G-12803A – Ident. No. P3415A
MIL-G-128030B & MIL-G-12803C – Ident. No. F328148M4
ASTM D 1170 and SAE J90 – Ident. No. P3415A
ASTM F 104 and SAE J90 – Ident. No. F328148-E41-M4
Physical Characteristics
Fibre (60% by volume) and Cork (40% by volume) – 45% to 55%
Moisture – 6% to 10%
Chemical Solids – 35% to 45%
Conditioning
All samples conditioned prior to testing as specified by applicable application–usually 50% RH -70 to 85o F for a period of 22 or 24 hours.
Standards
(Using American Society of Testing Materials Specification ASTM F 104 prepared jointly with the Society of Automotive Engineers and similar in requirements to MIL-G-12803C.
Original Physical Properties
Test Load – 1000 p.s.i. min.
Compressibility – 40% to 55%
Tensile Strength – 1000 p.s.i. min.
Physical Properties After Impression
Fuel B–Thickness increase – 5% maximum (Not Applicable to MIL-G-12803C)
#3 Oil–Thickness increase – 5% maximum
Fuel B–Weight increase – 30% maximum (Not Applicable to MIL-G-12803C)
#3 Oil–Weight increase – 30% maximum
Water–Weight increase – 100% maximum
Thickness Tolerances
Thickness Plus or Minus
.006″, .010″ and .015″ .0035″
.021″, .031″, .046″ and .062″ .005″
.096″ (3/32″) .008″
.125″ (1/8″) and up .016
Flexibility
FIBRE-KORK is capable of withstanding bending around a rod with a diameter of twice the thickness of the material under test, without cracking, breaking, or excessive marring of the surfaces.
Temperature Limit
250° F