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| Gaskets & Papers Rockseal® fibres are specially developed for the gasket industry where fibre length and a high fibre index are very important. They have a strictly controlled chemical composition and are heat-resistant up to 1000 ºC, making them suitable for many gasket and heat shield applications. Rockseal® performance at elevated temperatures easily surpasses other materials such as cellulose, slag, glass and aramid. No ignition loss/no oxidation means a low porosity of the gasket resulting in improved durability and long term sealing properties. With their small diameter, they can also be used in areas where glass fibres are not suitable due to their size. The fibre length and diameter distribution of Rockseal® fibres contribute to an improved compression set and creep resistance for the rubber based compounds used in a gasket. Silanised Rockseal® fibres can be used to improve the cross links with all the binder in the matrix, creating a closed fibre matrix network. This results in improved mechanical strength for the gasket and gives it high creep resistance. Many different surface treatments are possible with Rockseal®, allowing fibres with very strong affinity with water, binder or solvents and hence excellent dispersion in the binder/solvent/aqueous medium. This in turn means a very short mixing time and a highly homogeneous mixture. The affinity of Rockseal® with rubber/solvent mixtures also allows fibre contents of up to 95%, yielding high compression resistance and low creep/relaxation. Higher fibre loads also ensure sealing even when the rubber is already deteriorating, prolonging gasket life. View our brochure on Gaskets & Papers application View the Rockseal® Datasheets View the Rockseal® Product Range |
