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Cork

Cork

An Introduction to CB Frost’s Cork

Cork is the bark of the cork oak, a noble tree with very special characteristics, grown in the Mediterranean region, mainly Portugal.

It is a suitable product that has minimal impact on the environment.

Cork has a range of beneficial characteristics, including excellent resistance to oil and anti-vibration properties. Cork is also relatively cheap, but highly effective in sealing a wide range of applications, including electrical transformers and switchgear, fuel, and oil pumps. Cork is also commonly used as expansion jointing for flooring. As well as providing Cork sheeting and roll material, using our in-house manufacturing facilities, we can produce Cork strips, gaskets, and washers for a wide range of applications.

We can supply Cork sheeting in a variety of grades, including Neoprene bonded or Nitrile bonded Cork.

Cork Thicknesses

1mm, 2mm, 3mm, 4mm, 5mm And 6mm As Standard

Specifications

Specifications Typical Values
Binder: Neoprene/Nitrile
Spec: BS2F66
Hardness: 60 – 80 shore A
Specific Gravity: 0.7 – 0.8

**Data as per our current stock grade

Physical

Property Typical Value
Material Description
Cork granule size U.S Mesh 18/35
Binder Neoprene/Nitrile Rubber
Specification Performance
BSAU RC80-B
DEF 22 (Aircraft Industry)
BS2F66 (minimum granule mix 65% Nitrile as per British Standard)
ASTM F 104 (F225000-M2S9)
Physical Characteristics
Hardness Shore A 60 – 80
Specific Gravity 0.700 – 0.800
Density KG / CU.MT. 700 – 800
Density LBS / CU.FT. 43.8 – 50.0
Compressibility @ 440 psi. (28kg/sq.cm) % 25 – 40
Recovery (min) % 75
Tensile Strength (min) psi. (250kg/sq.cm) 17.5
Thickness Tolerance (%) Normal +/- 10
Flexibility
Original (F-5) No Cracks
Oven aged, 70hrs @ 100°C (F=16) No Cracks
ASTM No 1 Oil, 70 hrs @ 100°C (F=16) No Cracks
Volume change after immersion
ASTM No 1 Oil, 70hrs @ 100°C -10 to +10
ASTM No 3 Oil, 70hrs @ 100°C 0 to +20
ASTM Fuel A, 22hrs @ R.T.O 0 to +10
Test Method
ASTM F 104-59
Operates at up to +135c in fluid down to -30c.

Specification and test methods according to: ASTM F 104-93.

Overview:

Oil Resistant

Oil Resistant

Flame Retardant

Flame Retardant

Excellent Anti Vibration Properties

Excellent Anti Vibration Properties

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Die Cutting Formes

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Gaskets

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Washers

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Strip

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Sheeting

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Extrusions

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Rubber Moulding

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Adhesives and Lamination

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Fabrication & Assembly

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