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Nitrile Rubber Compound Series
Nitrile Rubber    Nitrile (NBR, Buna N) compounds for general usage requiring oil resistance     (20-95 duro)
High ACN Nitrile Rubber    High ACN Nitrile rubber compounds for enhanced resistance to Aromatic and Paraffinic type solvents      (40-95 duro)
  Nitrile Rubber High ACN Nitrile Rubber
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Processing Parameters

Bonding: Use commercially available bonding agents suitable for Nitrile rubber, such as Chemlok 205, Chemosil 211, or Cilbond 10 or 80/12.

Extruding: Maintain 60C in the screw and barrel of the extrudder. Use of a die heater may be helpful but avoid excessive temperature. Adjust the temperature up or down as necessary. Extrude through a 60 mesh (minimum) screen.

Sheet Building: A calender thickness of 1.5mm (0.060") is recommended.

Wrapping: Use of polyester, nylon, cotton, or other types of tape are acceptable.

Curing: A 5-6 hour cure at 145 - 150C has generally been found to be adequate for nominal size rollers. Length of cure time may need to be increased to accomodate larger rollers.

Please note that the above is meant to be a general guideline only. It represents conditions others in the industry have found to be satisfactory. Each manufacturer has to determine themselves as to what works best in their environment.

Notable features of Nitrile Rubber:
  • Oil resistant rubber
  • Available in a full range of hardnesses
  • Readily formulated for a broad base of typical applications
  • Available as Sulphur cured or Peroxide cured compounds
  • Easy to process, ie. in fabricating rollers
  • Available in strip for extrusion building or as calendered sheet for sheet fabrication
  • HIGH ACN (acrylonitrile content) is available for enhanced resistance to Aromatic and Paraffinic type solvents
  • Cost effective
  • High resiliency
  • Excellent resistance to water

Nitrile rubber, also referred to as NBR or Buna N, is the workhorse of the roller industry. Chemically, Nitrile rubber is a copolymer of butadiene and acrylonitrile. Its primary claim to fame is resistance to attack by oils, and so consequently it has found use in printing rollers, where resistance to Paraffinic Hydrocarbon based inks is essential.

Other industrial roller applications involving exposure to oils and Paraffinic type solvents find Nitrile rubber the natural choice. In addition, NBR based compounds can be formulated for wet applications such as those found in the textile, papermaking and metal processing industries.

Nitrile rubber is used by the roller industry more than any other type of rubber.

As Nitrile rubber is used in so many different types of roller applications, it is found in several different series or families of Chase Elastomer formulations. Please refer to specific data sheets on each of the following:

BN     Nitrile Rubber (this data sheet)
BH    High ACN Nitrile Rubber (this data sheet)
BT    Nitrile Textile Series
BX    Nitrile eXtra Tough
XN    Carboxylated Nitrile Rubber
HN    Hydrogenated Nitrile Rubber
BA    Aqua Series
HW   HW Series
NP    Nitrile/PVC Series
NB    NB Series