Neoprene - Polychloroprene (CR)

Polychloroprene Rubber (CR), commonly referred to as Neoprene, was one of the first oil resistant rubbers to be developed. Neoprene is a chlorinated elastomer and has a similar structure to butadiene rubber but with one hydrogen atom in the monomer replaced with a chlorine atom. The chlorine atoms modify the behaviour of the rubber by making it less bouncy as well as making it less reactive. This gives CR relatively good weathering and heat resistance especially for a polymer which contains double bonds in its chains. The chlorine also gives the material a level of fire protection making it a good material choice for cables. Neoprene offers a degree of stress crystallisation and is reasonably strong even without reinforcing filler.

Butyl rubber has one of the lowest permeabilities to gas of all rubber. This makes it excellent for use inner tubes for tyres and high pressure/vacuum sealing applications. IIR also has a low resilience and is often used in high energy absorbing applications.

Key Properties of Neoprene:

  • Good bonding strength
  • Good heat resilience (better than NR, IR, SBR and PU)
  • High resilience and recovery
  • Good wear resistance
  • High strength in unfilled and Carbon Black filled compounds
  • Moderate low temperature
  • Self-extinguishing
  • Relatively low cost
  • Available in food quality grades

Drawbacks:

  • Cannot be vulcanised by sulphur
  • Low level of physical properties

Operating Temperature Range: -35 to +100 °C

Chemical Compatibility:

  • Moderate chemical and oil resistance
  • Good resistance to alcohols, glycol, salts, vegetable oils
  • Not compatible with carbon tetrachloride, acetone, benzene, carbon disulphide, turpentine, aromatic solvents.
  • Weather resistant

Typical Applications:

  • Adhesives
  • V-belts, conveyer belts
  • Wire and cable jacketing
  • Footwear and coated fabrics
  • Wet suits
  • Inflatables, dinghies
  • Tarpaulins
  • Hoses
  • Mounting and bearing pads
  • Windscreen wiper blades

Grades:

  • General purpose grades (M & XD) – These grades offer the best tensile, tear strength, compression resistance, optimum heat resistance, best low temp properties
  • Sulphur modified grades (S) – best elasticity, best dynamic behaviour, best adhesion to metal/textile.

Neoprene Sheet

Black neoprene (10% content) / SBR rubber 70 shore. It is used where a cheaper quality material will suit in simple applications such as packing pieces, dust seals, protection pads etc where the material is not coming under any duress and slight resistance is required. this product is fully CE, PAH, ROHS, REACH compliant. Seals, hoses and gaskets are made from neoprene rubber sheeting and are often used with refrigerants and oils, both animal and vegetable. Neoprene rubber sheeting is also used to provide noise isolation in power transformers and as a base for adhesives. Its resistance to burning has led to it being used as weather stripping for fire doors.

Available Finishes: 'SS' has a smooth finish on both sides, 'CC' has a cloth-print finish on both sides and 'CS' has a smooth finish on one side and a cloth-print finish on the other.

We stock a majority of these strip materials at all times, so the likely lead time will be between 1 and 2 days. However, should we not hold the specific product required, we'll be able to provide within 3-5 days. Get in touch to discuss any specific requests.

Specification:

Resistant to moderate chemicals and acids, as well as fats, greases and oils. Good ozone, oxygen and UV resistance. Neoprene is a very hardy material. However, the presence of strong oxidizing acids and esters will cause degradation. Ketones and chlorinated, aromatic and nitro hydrocarbons are also not suitable for use with neoprene rubber.

  • Polymer content: 10%
  • Density: 1.45sg
  • Hardness: 70 shore a
  • Tensile strength: 40 kg/cm2
  • Elongation at break: - 200%
  • Min temperature: -30 °C
  • Max temperature: +90 °C
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