Dolphin Rubber is specializes in the design and manufacture of custom molded rubber and plastic products for our OEM customers worldwide. From concept to finished molded component, our team of knowledgeable professionals works to ensure excellence in the product we deliver to our customers

Contact Information
17, Baliyadev Colony
 N.H.NO - 8, At & Post POR
Dist. - Vadodara - 390023

PhoneMobile : +91 99989 83158
Fax Phone : 0265-2831299
WWW Link Website : www.dolphinrubber.com
Email Email : info@dolphinrubber.com

Rubber Materials

Dolphin Rubber works with a vast range of materials. Environmental factors such as extreme temperatures, exposure to oils, fluids and chemicals, combined with physical requirements such as strength, flexibility and impact resistance will all help determine the most appropriate material to use.

Below you will find a list of the most common materials that we use & a Summary Datasheet.

• Natural Rubber (Polyisoprene)
• SBR (Styrene-Butadiene-Rubber)
• EPDM (Ethylene Propylene Diene Monomer)
• Neoprene CR (Polychloroprene)
• Hypalon CSM (Chlorosulphonated Polyethylene)

• Nitrile NBR (Nitrile Butadiene Rubber)
• Acrylic ACM (Alkyl Acrylate Copolymer)
• Vamac
• Silicon SI
• Therban HNBR
• Viton
• Flurosilicone FSiI

Click image to enlarge a Summary Datasheet in a new window

Rubber Types

Dolphin Rubber currently produce components in a wide range of rubber types, and are constantly developing new formulations to widen the scope of application for our customers. Data sheets are available for our fully developed rubber types; please contact our technical and sales team for information.

The rubber types are too numerous to go into details, but please consult our materials table for general guidance.

Rubber type. (Typical trade names)

Optimum temperature of use
Best resistance Limitations
Typical applications

NR / IR; Natural rubber / Polyisoprene

-50 to +80ºC

Very good resistance to weathering and ozone, severe dynamic abrasion and vibration. High resilience and flex-fatigue resistance and hot tear. Not widely resistant to most oils and chemicals. Combustible. Used in tyres, drive couplings, bridge bearings, civil engineering

SBR; Styrene Butadiene rubber

-40 to +100ºC

Substitute for more expensive NR. Greater hysteresis loss gives better grip in passenger car tyres. Improved ageing over NR/IR. Moderate weathering and low chemical / oil resistance. Combustible Used in tyres, audio, drive coupling and general rubber applications

IIR; Butyl rubber

-50 to +100ºC

Very low gas permeability, insulating. Resistant to ozone and weather, refridgerants and a range of organic and inorganic fluids. Can also be polymerised with chlorine and Bromine to improve chemical resistance and flexibility. High damping. Limitations include low resilience and combustibility. Used in seals and gaskets, linings and membranes, diaphragms and some pharmaceutical goods.

CR; Polychloroprene rubber

-35 to +110ºC

Very good resistance to oxidising agents, some oils, ozone & weathering, and refridgerants. Self extinguishing and good adhesion to metals. Only moderate petroleum and water resistance unless modified with litharge cure compounds. Used in belting, coated fabrics, cable jackets and domestic fridge door seals.

EPR/EPDM;Ethlylene Propylene rubber copolymer & terpolymer

-50 to +180ºC

Excellent general purpose rubber with very good resistance to weathering and ozone. Normally electrically resistant but can be compounded to be conductive. Excellent resistance to hot water and steam. Not recommended in certain mineral and synthetic fluids, lubricants and fuels. Combustible and only moderate adhesion to metals. Used in automotive door seals, cable insulations, hoses and weather proofing / water proofing. Can be compounded for potable water (WRC) goods, foodstuff contact and some biomedical applications.

NBR / XNBR; Acrylonitrile Butadiene rubber

-40 to +110ºC

Dependant on level of acrylonitrile content low gas permeability, good heat age & ozone resistance, resistance to aromatic hydrocarbons & oils. Can be modified with PVC for improved age, weather resistance & fire retardancy. Also can be carboxylated (XNBR) for greatly improved tensile-abrasion resistance & other physical characteristics with higher temperature resistance. Not recommended for use with polar solvents. Weather & ozone resistance only moderate unless specially compounded. Used in seals & gaskets, diaphragms, drive couplings, audio equipment, hoses in oil & gas industries, food contact applications

HNBR; Hydrogenated nitrile rubber

-40 to +180ºC

Greatly improved chemical and oil resistance to NBR, with higher temperature limit. Resistant to hot air and water, industrial lubricants, sour oil and gas, some corrosion inhibitors. Very high durability and abrasion resistance. Can be further modified with methacrylate for even higher physical and temperature applications. The limitations are the same as NBR but the material has an extended temperature range. Used in seals and gaskets, diaphragms in the oil and gas industries; a good intermediate where fluorocarbon rubbers are too expensive.

AU / EU; Polyurethane rubber

-35 to +70ºC

Outstanding tensile and abrasion resistance properties, with very good resistance to ozone and high energy radiation. Often specified where high durability or abrasion resistance is required with use in hydraulic fluids. Main limitations are in hot climates where hydrolysis and microbacterial attack are likely. Used in hydraulic seals and gaskets, diaphragms and hoses, skateboard wheels and specialised tyres.

ECO; Epichlorohydrin homopolymer, copolymers & terpolymers

-50 to +130ºC

Resistant to a wide range of oils, water, acids and ozone, weathering and gases. Similar low gas permeability to nitriles but better low temperature flex-fatigue resistance. Corrosive to metals, so not recommended in rubber to metal bonding. Not recommended in ketones, esters, alcohols and certain hydraulic fluids, oxidising agents and chlorine. Electrically not insulating. Used in seals and gaskets, diaphragms, belts and cable sleeves.

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