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ISO:9001:2008

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Rubberized Cork Sheets


AR Cork has been producing the best of its own Rubberised cork sheets.using various properties of Rubbers, Rubberized cork products has very good compressibility,Recovery, chemical resistance, temperature tolerance, and good tensile strength along with other dimensional properties. Cork Nature and technology makes it most appropriate for multiple industries.

Though the resiliency of the natural cork has a good effect in the oil level gauges but yet the inexplicable cork application lies in the automotive industry is none other than the cork and rubber sheets. Compressibility, buoyancy and dimensional stability of the rubberized cork are making the best cork products in the automobile industry.

Rubberized cork sheets are proven to be the best in the transformer industry as well, where the rubberised cork is used to avoid the leakage of the very searching of the coolant fluids that are used in modern type electrical transformer. Widely used in gear circuit breakers, lightening arresters, gear cases and the washing plates in washing machine are also developed with the Rubberised cork products.

What We Produce

Under the Brand Name of Trishul , AR Cork presently manufactures rubberized cork in sheet forms having standard size of 915 mm X 610 mm, 915 mm X 915m,1000.mmx1000m and 1000mmx1200mm, sheet thickness varying from 0.8 mm to 20 mm. Other sizes are available on request. Sheets can be supplied as per IS 4253 Part II:2008 specifications or international specifications/customer specifications.
Rubberised Cork Classified as:-

Type-A

Non Oil Resistent

Medium Oil Resistent

Type-B

Good Oil Resistent

Type-C

Very Good Oil Resistent

Grades & Properties RC - 50A
TR5 - A
RC - 70A
TR7 - A
RC - 80A
TR8 - A
RC - 50
TR5 - M
RC - 70
TR7 - M
RC - 80
TR8 - M
RC - 50B
TR5 - B
RC - 70B
TR7 - B
RC - 80B
TR8 - B
RC - 50C
TR5 - C
RC - 70C
TR7 - C
RC - 80C
TR8 - C
Hardness 1RHD 50+/- 5 70+/-5 80+/- 5 50+/- 5 70+/- 5 80+/- 5 50+/- 5 70+/- 5 80+/- 5 50+/- 5 70+/- 5 80+/- 5
Dimensional Changes % Max 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5
Tensile Strenght Kpa : Min 650 900 1250 650 900 1250 700 1250 1550 1250 1550 1900
% Compressibility (at 2800 kpa) 45 - 65 30 - 45 15 - 30 45 - 60 30 - 45 15 - 30 45 - 60 35 - 50 25 - 35 35 - 45 25 -35 15 - 25
% Recovery - Min 80 80 75 80 80 80 80 80 75 80 80 75
% Compression Set Max 90 90 90 85 85 90 80 85 90 80 85 90
Fluid Resistent Test
(a) Volume change after
immersion in ASTM oil No.3 for
70 HRS at 100
N.A. Max 40% Max 25%

Max15%

(b) Volume change after
immersion in IS.335
oil (transformer oil)
- - - Max 8%
Chemical Test on Water Extract
(a) Ph, Where applicable 5 - 8.5 5 - 8.5 5 - 8.5 5 - 8.5
(b) Chloride Content
(as chloride ion)
0.2% Max 0.2% Max 0.2% Max 0.2% Max
(c) Sulphate Content
(as Sulphate ion)
0.2% Max 0.2% Max 0.2% Max 0.2% Max
Gaskets Suitable for General Purpose
light Electrical & General
Automotive industry
General Purpose
Automobile industry
Automobile industry
Light Electrical Industry
Automobile industry,
Heavy Electrical
Industry, Ship Building
and Aircraft industry