Natural rubber has great elasticity, high constant elongation strength, excellent tear resistance and electrical insulation, good wear resistance and drought resistance, good processing performance, easy to bond with other materials, better than most synthetic rubber in terms of comprehensive performance.
Disadvantages are poor oxygen and ozone resistance, easy to aging deterioration;
Poor resistance to oil and solvent, low resistance to acid and alkali corrosion;
Low heat resistance.
Service temperature range: about -60℃~+80℃.
To manufacture the insulation layer and sheath of tires, rubber shoes, rubber pipes, tapes, electric wires and cables, and other general purpose products.
Especially suitable for manufacturing torsional vibration eliminator, engine shock absorber, machine support, rubber-metal suspension components, diaphragm, mould-pressed products.
The properties of styrene butadiene rubber are close to that of natural rubber, and it is the universal synthetic rubber with the largest output at present. Its characteristics are more wear resistance, aging resistance and heat resistance than that of natural rubber, and its texture is more uniform than that of natural rubber.
Disadvantages are: low elasticity, poor flexure resistance and tear resistance;
Poor processing performance, especially poor self-viscosity, low strength of raw adhesive.
Operating temperature range: about -50℃~+100℃.
It is mainly used to replace natural rubber to make tires, rubber board, rubber hose, rubber shoes and other general purpose products.
The characteristics of ethylene propylene rubber ozone resistance, uv resistance, weather resistance and aging resistance, ranked first in the general rubber.
Good electrical insulation, chemical resistance, impact elasticity, acid and alkali resistance, low specific gravity, high filling fit.
Heat resistant up to 150℃, polar solvent - ketone, ester, but not resistant to aliphatic hydrocarbon and aromatic hydrocarbon, other physical and mechanical properties slightly inferior to natural rubber and better than styrene butadiene rubber.
The disadvantage is that self - viscosity and mutual viscosity is very poor, not easy adhesion.
Operating temperature range: about -50℃~+150℃.
It is mainly used for lining of chemical equipment, covering of wire and cable, steam hose, heat-resistant transport belt, rubber products for automobile and other industrial products.
Flexible and skilled use of polyethylene and other resin series.Good water resistance;Low tensile strength, poor creep resistance and good impact resistance.Impact strength LDPE>LLDPE>HDPE, other mechanical properties LDPE>LLDPE>HDPE. It is mainly affected by density, crystallinity and relative molecular weight. With the improvement of these indexes, its mechanical properties increase.The environmental stress cracking resistance is not good, but it is improved when the relative molecular weight increases.Good puncture resistance, LLDPE is the best.
Production efficiency has been greatly improved.Vulcanized rubber injection molding machine can be used directly, the time from the original 20min or so, reduced to less than 1min;Because the vulcanization time required is very short, direct vulcanization by extruder has been available, and the production efficiency has been greatly improved.
Easy to recycle, reduce costs, reduce environmental pollution, expand the source of renewable resources.
Energy saving.Most thermoplastic elastomers do not require vulcanization or vulcanization time is very short, can effectively save energy.
It has a wider range of applications.Due to the advantages of both rubber and plastic, TPE has opened up new application fields for the rubber industry.
It can be used for strengthening and toughening modification of plastics.
Butadiene rubber is characterized by its excellent resistance to gasoline and aliphatic oils, second only to polythiorubber, acrylate and fluororubber, and superior to other general purpose rubbers.
Good heat resistance, air tightness, wear resistance and water resistance are good, strong adhesion.
Disadvantage is cold resistance and ozone resistance, strength and low elasticity, poor acid resistance, poor electrical insulation, polar solvent resistance performance is also poor.
Service temperature range: about -30℃~+100℃.
Mainly used in the manufacture of various oil-resistant products, such as rubber hose, sealing products, etc.
With high strength and elastic coefficient, high impact strength, wide range of service temperature;
High transparency and free dyeing;
Low forming shrinkage and good dimensional stability;
Good fatigue resistance;
Good weather resistance;
Excellent electrical properties.
Temperature resistance: High thermal stability of silicone products, chemical bonds of molecules under high temperature (or radiation exposure) do not break, do not decompose.
Silicone is resistant to both high and low temperatures and can be used over a wide range of temperatures.
Both chemical properties and physical and mechanical properties change very little with temperature.
Weatherability: Silicone has better thermal stability, irradiation resistance and weather resistance than other polymer materials.
The service life of organic silicon in the natural environment can reach several decades.
Electrical insulation performance: in addition to excellent heat resistance, it also has excellent water repellency, which is the guarantee of high reliability for the use of electrical equipment under wet conditions.
chloroprene rubber molecules contain chlorine atoms, so compared with other general rubber: it has excellent anti-oxygen, anti-ozone, non-flammable, fire can be self-extinguishing, oil resistance, solvent resistance, acid and alkali resistance, aging resistance, good gas tightness and other advantages;
Its physical and mechanical properties are better than natural rubber, so it can be used as general rubber, also can be used as special rubber.
The main disadvantages are poor cold resistance, large specific gravity, high relative cost, poor electrical insulation, easy to roll during processing, easy to burn and easy to stick mold.
In addition, the raw adhesive stability is poor, not easy to preserve.
Operating temperature range: about -45℃~+100℃.
It is mainly used for manufacturing cable jacket with high ozone resistance and aging resistance and various protective sleeves and covers.
Oil-resistant and chemical-resistant rubber pipes, tapes and chemical linings;
Inflammable underground mining with rubber products, as well as a variety of moulded products, sealing rings, pads, adhesives, etc.
The advantages of BUtadiene rubber are: excellent elasticity and wear resistance, good aging resistance, excellent low temperature resistance, low heat under dynamic load, easy to metal bonding.
The disadvantages are low strength, poor tear resistance, poor machining performance and self-viscosity.
Service temperature range: about -60℃~+100℃.
General and natural rubber or styrene butadiene rubber used, mainly to make tire tread, transport belt and special cold-resistant products.
Isopentyl rubber is similar to natural rubber in chemical composition and three-dimensional structure, and its performance is also very close to natural rubber, so it is known as synthetic natural rubber.
It has most of the advantages of natural rubber, aging better than natural rubber, elasticity and strength is slightly lower than natural rubber, processing performance is poor, high cost.
Operating temperature range: about -50℃~+100℃.
It can replace natural rubber to make tires, rubber shoes, rubber hose, adhesive tape and other general purpose products.
butyl rubber is the biggest characteristic of good air tightness, ozone resistance, aging resistance, high heat resistance, long-term working temperature can be below 130℃;
Can withstand inorganic strong acid (such as sulfuric acid, nitric acid, etc.) and general organic solvent, good vibration absorption and damping characteristics, electrical insulation is also very good.
Disadvantages are poor elasticity, poor processing performance, slow curing rate, poor adhesion and oil resistance.
Operating temperature range: about -40℃~+120℃.
Mainly used for inner tube, water tube, balloon, wire and cable insulation layer, chemical equipment lining and shockproof products, heat-resistant transport belt, heat-resistant aging tape products.
Hydrogenated butadiene rubber is obtained by the double bond in the hydrogenated NBR of all or part of the butadiene.
It is characterized by high mechanical strength and wear resistance, better heat resistance than NBR when using peroxide crosslinking, and other properties are the same as butadiene rubber.
The disadvantage is the higher price.
Service temperature range: about -30℃~+150℃.
Mainly used for oil - resistant, high - temperature sealing products.