Materials

Natural Rubber (NR)

Natural rubber is a versatile material use in engineering for many years because it can take a beating and still perform crucial functions.Natural rubber combines high tensile and tear strength with an outstanding resistance to fatigue. These capabilities make natural rubber an ideal polymer for dynamic or static engineering applications such as tires, printer rollers, agitators, and other parts that will come into regular contact with abrasive surfaces or other damaging elements.

Natural Rubber(NR) Characteristics

◆Hardness: 20-100 Shore A
◆Tensile Range (P.S.I.): 500-3500M
◆Elongation (Max. %): 700
◆Compression Set: Excellent
◆Resilience-Rebound: Excellent
◆Abrasion Resistance: Excellent
◆Tear Resistance: Excellent
◆Solvent Resistance: Poor
◆Oil Resistance: Poor
◆Low Temperature Usage: -20° to -60°
◆High Temperature Usage: up to 175°
◆Aging Weather-Sunlight: Poor

Natural Rubber Applications

◆Insulation Grommets
◆Vibration Mount Grommets
◆Grommet Style Bumpers
◆Recess Style Bumpers
◆Angle Extrusions
◆Rubber Strip
◆Vibration Isolation Mountings
◆Round Vibration Isolation Mounts
◆Conical Vibration Isolation Mounts
◆Rubber Bellows & Boots

EPDM

EPDM is excellent resistances to weather, heat, and other factors without breaking the bank molded and highly chemical and ozone resistant.
EPDM also know as an extremely versatile material used in a variety of applications, from automotive products to HVAC parts. This type of rubber also acts as a less expensive alternative to silicone, as it can last for long periods of time with proper use. As such, EPDM can save you time and money depending on the needs of your application.

EPDM Properties

this material is commonly used in the automotive, water (including hot and steam), HVAC and construction industries.

◆Tensile Strength: 500-2500 P.S.I.
◆Elongation 600% Maximum
◆Heat Aging Resistance – Excellent
◆Abrasion Resistance – Good
◆Compression Set – Good
◆Tear Resistance – Fair
◆Weather Resistance – Excellent
◆Ozone Resistance – Excellent
◆Gas Permeability Resistance – Poor
◆Oil Resistance – Poor
◆Standard Temperature Range: -20°to +350°F
◆Hardness (Shore A): 30 to 90

EPDM Properties

◆Seals
◆Gaskets
◆Aircraft Tubing
◆Window Seals
◆Weather Stripping
◆Setting Blocks
◆Grommets
◆Belts
◆Electrical insulation and stinger covers

Nitrile Rubber(NBR)

Nitrile Rubber is also called as nitrile-butadiene rubber (NBR, Buna-N), a synthetic rubber that provides excellent resistance to silicone greases, hydraulic fluids, alcohols, and water. It also has a favorable balance of good compression set, high abrasion resistance, and high tensile strengths. Nitrile Rubber is ideal for any use where the rubber will contact oiled surface or be exposed to oil or fuel. In engine systems, it can be used to produce parts such as gaskets, seals, hydraulic hoses, carburetor and fuel pump diaphragms and O-rings. It is also used for rubber-to-metal bonded components, molded shapes, rubber bumpers or for contact with oily surfaces. Liangju Rubber can work with your business to design and provide nitrile rubber parts customized for the specific requirements of your applications.

Nitrile Rubber(NBR) Characteristic

◆Heat Aging Resistance – Good
◆Abrasion Resistance – Excellent
◆Compression Set Resistance – Good
◆Tensile Strength: 200-3000 P.S.I.
◆Elongation: 600% Maximum
◆Adhesion to Metals – Good to Excellent
◆Tear Resistance – Good
◆Flame Resistance – Poor
◆Weather Resistance – Poor
◆Ozone Resistance – Very Poor
◆Gas Permeability Resistance – Good
◆Oil Resistance – Excellent
◆Flexibility in Low Temperatures – Good
◆Standard Temperature Range: -40° to +257°F
◆Hardness (Shore A): 40 to 90

Nitrile Rubber(NBR) Applications

◆Gaskets
◆Seals
◆O-rings
◆Rubber-to-metal bonded components
◆Carburetor and fuel pump diaphragms
◆Fuel systems
◆Hydraulic hoses
◆Tubing
◆Anything that comes into direct contact with lane oil

Neoprene Rubber(CR)

Neoprene Rubber, we call it CR, is highly popular for its balance of performance properties among the synthetic polymers, and is uniquely resistant to petroleum oils, environment, ozone, UV and oxygen. Classified as a general purpose elastomer, chloroprene is used in a wide range of industries including transportation, recreation, and refrigeration sealing.

Neoprene Rubber(CR) Characteristic

◆Hardness: 20 – 95 Shore A
◆Tensile Range (P.S.I.): 500 – 3000
◆Elongation (Max. %): 600
◆Compression Set: Good
◆Resilience – Rebound: Excellent
◆Abrasion Resistance: Excellent
◆Tear Resistance: Good
◆Solvent Resistance: Fair
◆Oil Resistance: Fair
◆Low Temperature Usage: 10° to -50°
◆High Temperature Usage: up to 250°
◆Aging Weather – Sunlight: Good
◆Adhesion to Metals: Good to Excellent

Neoprene Rubber(CR) Applications

◆Neoprene Hose Covers
◆CVJ boots
◆Power transmission belts
◆Vibration mountings
◆Shock absorber sealings
◆Breaking and steering system components
◆Construction Industry
◆Window sealings
◆Window gaskets
◆Highway and bridge seals
◆Bridge bearing pads
◆Washers
◆Bridge stay-cable anchor components

Silicone Rubber

Silicone is one of the materials of choice for any application that deals with environmental factors that can break down other solutions. However it makes up for that with a great resistance to extreme temperatures. Organic rubber has a carbon-to-carbon backbone which can leave it susceptible to ozone, UV, heat and other ageing factors that silicone rubber can withstand well. This makes silicone rubber one of the elastomers of choice in many extreme environments. It is often used for it's powerful insulating properties. Becoming more and more common at the consumer level, silicone rubber products can be found in every room of a typical home. It is used in automotive applications, many cooking, baking, and food storage products, apparel including undergarments, sportswear, and footwear, electronics, to home repair and hardware, and a host of unseen applications.

Silicone Properties

Silicone is ASTM D-2000 Classification FC, FE, GE and is known by its chemical definition of Polysiloxane

◆Tensile Strength: 200-1500 P.S.I.
◆Elongation 700% Maximum
◆Heat Aging Resistance – Excellent
◆Abrasion Resistance – Poor
◆Compression Set Resistance – Excellent
◆Tear Resistance – Fair
◆Flame Resistance – Poor
◆Weather Resistance – Excellent
◆Ozone Resistance – Excellent
◆Gas Permeability Resistance – Poor
◆Oil Resistance – Fair
◆Standard Temperature Range: -100° to +450°F
◆Hardness (Shore A): 25 to 80

Silicone Applications

Sound and vibration dampening in automotive drive shafts
◆Shaft sealing rings
◆O-rings
◆Window and door seals
◆High-temperature gaskets
◆Wire and cable jacketing
◆Electrical safety stinger covers
◆Conductive profiled silicone seals

SBR

SBR (styrene-butadiene rubber) is a low cost non-pil resistant material. It has good water resistance and resilience up to 70 durometer; compression set becomes poorer with higher durometer; generally satisfactory for most moderate chemicals and wet or dry organic acids. SBR is not recommended for ozone, strong acids, oils, greases, fats and most hydrocarbons.

SBR Characteristic

◆Hardness (Shore A): 25 to 80
◆Tensile Range (P.S.I.): 500 – 3000
◆Elongation (Max. %: 600
◆Compression Set: Good
◆Resilience – Rebound: Good
◆Abrasion Resistance: Excellent
◆Tear Resistance: Fair
◆Solvent Resistance: Poor
◆Oil Resistance: Poor
◆Low Temperature Usage: 0° to -50°
◆High Temperature Usage: up to 225°
◆Aging Weather – Sunlight: Poor
◆Adhesion to Metals: Excellent

SBR Applications

◆Insulation Grommets
◆Vibration Mount Grommets
◆Grommet Style Bumpers
◆Recess Style Bumpers
◆Mounting Hole Grommets
◆Bumpers, Tips, & Appliance Feet
◆Rubber Bumpers
◆Rubber Tubing
◆Special Extruded Tubing and Seals
◆Refrigerator Door Seals

Butyl Rubber

Butyl is a popular material choice for many applications. It ages well in both ozone and sunlight and because of its ability to form an airtight seal and due to excellent low permeability to gases it is used extensively in vacuum sealing.

Butyl Rubber Properties

◆Hardness (Shore A): 40-75
◆Tensile Strength: 1500 P.S.I.
◆Elongation – 350% Maximum
◆Heat Aging Resistance – Excellent
◆Abrasion Resistance – Good
◆Compression Set – Good
◆Tear Resistance – Good
◆Weather Resistance – Excellent
◆Ozone Resistance – Excellent
◆Gas Permeability Resistance – Excellent
◆Oil Resistance – Poor
◆Standard Temperature Range: -50° to +250°

Butyl Rubber Applications

Butyl Rubber is often used in vacuum sealing and can be used as a hydraulic seal as well.

◆Hydraulic Seals
◆Vacuum Seals
◆O-Rings
◆Tank Liners
◆Pond Liners
◆Construction Hoses
◆Shock Mounts
◆Stoppers and Seals for Medical Containers

Fluorocarbon rubber (FKM Viton®)

FKM VITON MATERIAL

Fluorocarbon rubber (FKM Viton ®) has excellent resistance to high temperatures, ozone, oxygen, mineral oil, synthetic hydraulic fluids, fuels, aromatics, and many organic solvents and chemicals. It has a higher resistance to swell in high octane and oxygenated fuel blends. Low-temperature resistance is normally not favourable and for static applications is limited, although in certain situations it is suitable down to -40°F (-40°C). Gas permeability is very low and similar to that of butyl rubber. Special fluorocarbon compounds exhibit improved resistance to acids, fuels, water, and steam.

Fluorocarbon rubber (FKM Viton®) Characteristic

◆Hardness(SHA): 60 – 90
◆Tensile Range (P.S.I.): 500 – 2000
◆Elongation (Max. %): 300
◆Compression Set: Good
◆Resilience – Rebound: Fair
◆Abrasion Resistance: Good
◆Tear Resistance: Good
◆Solvent Resistance: Excellent
◆Oil Resistance: Excellent
◆Low Temperature Usage: +10° to -10°
◆High Temperature Usage: 400° to 600°
◆Aging Weather – Sunlight: Excellent
◆Adhesion to Metals: Good

Fluorocarbon rubber (FKM Viton ®)

◆Gaskets
◆Seals
◆O-rings
◆Radial lip seals
◆Manifold gaskets
◆Cap seals
◆Siphon hoses
◆Fuel hoses and tubing