GASKET SHEETS

Because the purpose of gaskets is to fill leaks and permanent compensation of joints, their basic feature is compressibility and elastic recovery, which are the essence of the sealing material. Traditionally, the production of gaskets uses precursor sheets of flexible material, i.e. gasket sheets, from which gaskets with the required sizes and shapes are punched out. In the past, there were sheets of leather, cork, rubber, cardboard, felt, asbestos, etc. Because in the modern equipment significantly increased the requirements for working conditions of gaskets and their durability, therefore more advanced materials are at present used, such as: PTFE, graphite, mica, compressed fiber glass, aramid and carbon fibers bonded with elastomers.

Expanded graphite sealing sheets reinforced with a tanged insert. PerfoGraf sheets are delivered in P 1 x 1,2 m and F 1,5 x 1,5 m formats and in jumbo T 2 x 2 m format. Standard plate thicknesses are: 1 1,5 2 and 3 mm but also 4 and 5 mm thicknesses are available.

The AluGraf sheet is pressed to form of a laminate from graphite foil and aluminium. The standard size of AluGraf boards is format P 1 x 1,2 meters, available in thicknesses: 0,8 1 1,5 and 3 mm.

Sealing sheets made form of a fewlayer laminate from graphite foil with 2 or 3 acid-proof inserts. The standard size of a MultiGraf sheet is format P 1,5 x 1,5 meter, available thicknesses: 2 and 3 mm.

Sealing sheets and foil made of pure graphite, reinforced by multirolling and planar orientation of the structure. The boards are available in 1 x 1,2 meter sheets or in foil in rolls with width 1 meter and 0,5 0,7 and 1 mm of thickness.

Sealing sheets and foil made of mica phlogopite type, which has excellent sealing also insulating properties in a wide range of operating temperatures up to 1000°C. Mica sheets are delivered in sheet with a format P 1 x 1,2 m for thicknesses: 1,5 2 or 3 mm and as foil with width 1 m for thicknesses: 0,5 0,7 1 or 1,5 mm.

Sealing sheets reinforced with a tanged insert. Termika R sheets are delivered in standard format 1 x 1,2 m for thicknesses: 1,5 2 and 3 mm.

Sealing sheets made from bidirectionally expanded PTFE. In addition the material is reinforced by on high level of internal structure. Multiflexon sheets are available in a format F 1,5 x 1,5 meter and in thicknesses: 0,5 1 1,5 2 3 4 and 5 mm.

However solid PTFE is a little hard and has worst sealing properties, but it has excellent chemical and thermal resistivity. Therefore, the PTFE foil and sheets are very popular gasket material. Thicknesses in scope from 0,2 up to 1 mm as foil and from 1 up to 8 mm as sheets are available

Gasket paper in the form of sheets is an universal and widely used material for the gasket production in the automotive industry as well as for devices and equipment of common use. This material can also be used to make industrial seals in a low range of parameters.