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Hose Compounds


Trafford Rubber Products have developed a full range of compounds for use within the rubber hose manufacturing industry.  They range from the general purpose type rubbers to the more specialty grades offering specific properties such as abrasion, chemical, heat & oil resistance.  Each compound can be produced in either Calendered or Calendered and Slit forms - Dimensions varying from 100mm to 1M wide and thickness of between 0.5 and 3mm.  They have been developed to be fully compatible with the various reinforcements used within the construction of hose

NITRILE   (HAN).

 The most suitable and commonly used rubber for applications where resistance to petroleum based fluids is required (there are rubbers with higher degrees of resistance but these are much more expensive).

 Properties

·         very good resistance to petroleum based fluids

·         good temperature resistance - up to 100’C (higher with special cure systems)

·         economical to compound and produce

·         very low level of permeability to gases

Limitations

·         poor resistance to outdoor weathering (can be improved with special compounding)

·         flammable and burns with toxic fumes   

 

POLYCHLOROPRENE / NEOPRENE  (HNE).

 Developed in the early days when in the search for an oil resistant rubber, now widely used due to its useful properties and comparatively low price.

 Properties

·         resistant to a wide range of hostile environments

·         resistant to oils and chemicals

·         weather and water resistant

·         can withstand temperatures from -30’C to 95’C

·         flame retardant

 Limitations

·         unsuitable for applications requiring contact with fuels

 

CHLOROSULPHONATED POLYETHYLENE / HYPALON (HCSP)

 Developed as a specialty rubber for rugged applications, sometimes known as a “super” Neoprene with similar but better developed characteristics.

 Properties

·         resistant to oil and fluids, especially at higher temperatures

·         excellent resistance to ozone and weathering - can withstand harsh outdoor conditions

·         good acid resistance

·         excellent abrasion and tear resistance

  Limitations

·         cannot be used where there is contact with fuels

 NATURAL RUBBER  (HSN).

Natural rubber is an environmentally desirable material and comes from    a naturally replenishable source, it is also readily biodegradable and  non-toxic.

Properties

·         very strong - naturally re-inforcing - and extremely resilient

·         good compression set

·         excellent abrasion and cut / tear resistance

·         good resistance to inorganic chemicals

·         good low temperature resistance

·         excellent shot blast resistance 

Limitations

·         lack of resistance to oil and organic fluids

·         relatively low maximum temperatures

·         poor ozone resistance

 

ETHYLENE PROPYLENE DIENE MONOMER  EPDM  (HEP)

 Originally developed for use in tyre applications, but now becoming more widely used due to its suitability for outdoor use.

 Properties

·         the most water-resistant rubber - also very resistant to most water based chemicals

·         very inert structure, remains stable over very long periods of time

·         good resistance to solvent based products

·         excellent weathering and ozone resistance

 Limitations

·         not suitable for applications with contact to oils / fuels

·         poor bonding characteristics to other materials

 

ETHYLENE ACRYLIC / POLYACRYLIC  (HPAC)

 A moderate cost, high performance rubber which resists the combined deteriorating influences of heat, oil and weather.

 Properties

·         good resistance to oxidation and weathering

·         good oil resistance

·         strong and abrasion resistant

·         excellent diesel resistance

 Limitations

·         limited resistance to fuels

 

HYDROGENATED NITRILE  HNBR  (HHN)

A rubber that provides good all round performance at a cost between Nitrile and Fluoroelastomer.  Its highly saturated main chain provides good resistance against thermal oxidation and chemical attack.

 Properties

·         good physical properties, including abrasion resistance, at high temperatures

·         good dynamic behavior and flex cracking resistance at elevated temperatures

·         excellent heat, ageing and ozone resistance

·         excellent oil and diesel resistance - being used more extensively for power steering hose

 Limitations

·         no inherent flame retardency

·         poor electrical properties

 

FLUOROELASTOMER / VITON  FKM  (HVT)

 The best material for resistance to hostile chemical and oil environments at normal and elevated temperatures.

 Properties

·         very strong and tough

·         good resistance to water, fuels, oils and most chemicals

 Limitations

·         limited use at low temperatures

·         expensive


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