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Rubbers

Specification sheets

All rubber was originally obtained from the rubber tree, but today a whole range of more or less synthetic rubbers have been developed.

Sundquist can supply most of the industrial quality rubbers on the market, such as Natural (NR), Para (NR), Styrene butadiene (SBR), Nitrile (NBR), Chloroprene (CR), EPDM, Polyurethane (PU), Silicone (Q) and Viton® (FPM). These flexible materials are currently used for everything from traditional seals to complex elements for e.g. reducing vibration.

Rubber is primarily divided into 3 variants:
Homogenous (smooth/patterned surface), cellular rubber and sponge rubber.

Homogenous rubber is produced in the shape of a sheet or a board, or alternatively can be moulded as a complete product.

Cellular rubber is primarily available as two variants. Either with closed cells or with both open and closed cells, so called semi-closed cells. The latter has a good memory with repeated compressions.

Sponge rubber is characterised by open cells with a skin on both sides.

Sundquist can also supply a special rubber based on urethane (Poron®) which, apart from good sealing characteristics, is also an extremely good vibration damper.

Examples of applications for this material group are:

  • Seals for liquids
  • Seals for air/gases
  • Seals for particles
  • Inserts
  • Spacers
  • Scrapers
  • Impact protection
  • Gap fillers
  • Vibration dampers
  • Cable grommets
  • Rubber bumpers

We also offer a wide range of patterned mats for visible wearing surfaces and aesthetic applications:

  • Floor mats
  • Anti-slip prevention
  • Furnishing

The hardness of rubber material is determined by Shore testing. The method uses an instrument with a pointed end or a ball that is pressed into the material, a reading is taken from a scale graduated between 0°Sh to 100°Sh. 0°Sh is a fully compressed material and 100°Sh is a very hard material. There are different Shore classes, of which Shore A is the most common for homogenous sheet and Shore 00 most common for cellular and sponge rubber.

The IRH (International Rubber Hardness) scale is also used for homogenous sheet. It is synonymous with Shore A.