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WYROBY Z POLIURETANU
Rubber - the oldest and most widespread elastomer in the industry. The properties of a given rubber depend on the type of base component used - NBR, SBR, EPDM, NR, IR, CR, CSM, FKM. Each of the given rubbers is characterized by specific properties.
Rubber elastomers have intermediate strength parameters between polyurethane and silicone (10 times weaker than polyurethane / 10 times stronger than silicone).
NBR - it is highly resistant to oils, fuels and chemicals. NBR vulcanizates have high tensile strength and flexibility as well as low permanent deformation under compression. Temperature resistance up to 100ºC.
SBR - quite high abrasion resistance compared to NBR. Resistant to many non-polar solvents as well as diluted acids and bases. They swell significantly in hydrocarbons and fats. Low temperature resistance - up to 80ºC. SBR rubber has an average resistance to weather conditions and ozone.
EPDM - resistant to light, heat, oxygen and ozone. Much higher resistance to heat aging compared to NR and SBR. Vulcanizates have excellent resistance to the action of inorganic or highly polar liquids such as acids, bases and alcohols. EPDM has a low wear factor and is a very good insulator and dielectric. Unfortunately, the resistance to organic solvents - aliphatic, aromatic and chlorinated hydrocarbons - is very low.
NR - it is characterized by very good strength parameters, including: tensile strength, tearing and tearing strength. It remains highly flexible at low operating temperatures.
IR - the non-polar structure, as in the case of NR, has a low resistance to non-polar factors such as: aliphatic, aromatic and chlorinated hydrocarbons. Strong oxidizing substances (e.g. nitric acid, hydrogen peroxide ...) also adversely affect isoprene rubber. Good resistance to compounds with a polar structure: water, alcohols, glycols, acetone and diluted acids and bases. The advantage of IR is the low amount of heat generated during dynamic loads.
CR - has very good durability parameters combined with high resistance to temperature, ozone and environmental factors. It perfectly dissipates the internal heat generated during the dynamic loads of the work of details made of CR.
CSM - High resistance to thermal degradation and aging, especially ozonation. Chlorine atoms contained in the rubber chains cause high resistance to light and non-flammability of products made of CSM. The use of this rubber allows the vulcanizates to obtain the best flexibility at low temperatures, heat resistance and mechanical properties.
FKM - they are chemically inactive both in hostile environments and against various organic liquids - oils and solvents. The low surface energy makes the fluoro rubber self-lubricating. Fluorine atoms increase the temperature resistance up to 350ºC.
The production of details and rubber coatings is performed using the vulcanization process of semi-manufactured raw materials. Our products can be manufactured in hardness from 30 Sh'A to 95 Sh'A.
We have a small but well-developed thermoplastic processing department in our machine park. We mainly deal with two technologies - extrusion and injection.
Acceptance of an order for the production of elements by means of extrusion and injection technology depends on:
> requirements (pcs / rm)
> workpiece grammage (g)
> complexity of the detail
Silicone - a special type of rubber elastomer with specialized properties. The most important features in favor of silicone are:
> temperature resistance - the performance characteristics of silicone details do not change in a large temperature range, from -50ºC to 250ºC. It is also possible to work with short-term contact with a temperature of up to 350ºC. Silicone rubber ignites only at the temperature of 430 ° C and burns at about 750 ° C.
> chemical resistance - materials made of silicone have excellent resistance to various types of gaseous and liquid media as well as UV radiation. The most common media include: oxygen, ozone, hot air, typical inorganic and organic solvents. Very resistant to weather conditions.
> anti-adhesiveness and high hydrophobicity to various media (varnishes, adhesives, paints ...)
> thermal and electrical insulation - silicone rubber has insulation properties comparable to the best known insulation materials in the world and maintains them at an increased temperature.
The only disadvantage of the details and coatings made of silicone is their relatively low strength parameters compared to other elastomers available on the market.
We process silicones using casting and vulcanization technology. The hardness of this elastomer is 30 Sh'A - 90 Sh'A.
Polyureas are an improved version of polyurethane plastics. The main application of polyureas are various types of protective coatings. The coatings made with the use of the material described above are characterized by:
> high strength parameters
> resistance to damage and scratching
> resistance to the water environment
> resistance to weather conditions and UV
> resistance to polar and non-polar chemical compounds (acids, bases, aliphatic, aromatic and chlorinated hydrocarbons, alcohols, aldehydes, ketones, esters ...)
> high temperature resistance (140 ° C - continuous contact, 180 ° C - temporary contact)
> can be applied to any type of substrate, regardless of its shape
> high adhesion to the coated substrate
> no joints during coating application (coating monolithic nature)
Due to the reactivity of the ingredients used to produce polyurea, we process it only by spraying in the form of solid coatings. The minimum thickness of the applied layer is 2 - 3 mm. The surface of the coating after spraying will always have a rough structure. As with polyurethanes, polyureas come in different hardnesses.
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