Terms and Phrases
Useful information-some notes, which come in handy
THE RUBBER TYPES:
NR-Natural rubber
Parts made of natural rubber have very good dynamic characteristics, good abrasion resistance. Due to their protein content, the natural rubber based parts are less protected against water, due to the isoprene chain are not the resistant to the oils.
IR-Isoprene rubber
The main chemical component is the same as in the natural rubber, but the IR does not contain protein, and not so much a regular structure, such as natural rubber. Therefore, the IR based rubber is much more difficult to crystallize, hence more heavy to use in raw state than natural rubber-based mixtures. Tensile strength is small, active filler will dramatically improve.
Oil resistivity bad similarly to the natural rubber, water resistance better than at the natural rubber
BR butadiene rubber
Butadiene rubber does not contain polar group, nor any methyl group, so interaction is weak between adjacent macromolecules. Hence this rubber is very resilient, and has good dynamic properties.
Comparing to the average natural rubber, BR has very small coefficient of friction and very good abrasion resistance
SBR-butadiene-styrene thermoplastic rubber
There are a wide variety of butadiene-styrene thermoplastic rubber, which can be quite large differences in properties. The greatest significance is the ratio of butadiene and styrene. High tensile strength and abrasion resistance.
NBR nitrile butadiene rubber
Copolymer of butadiene and acrylic-nitrile. There are a variety of nitrile content. Due to nitrile-group it is highly polar. By increasing the nitrile content the oil resistance increases sharply. As the molecule chain is getting stiffer: tensile strenght increases , and flexibility deteriorates.
CR-Chloroprene rubber
The main constituent is the polychloroprene. Due to chlorine content is polar; the molecule chain stiffness, oil-resistivity, density is similar to a butadiene-nitrile (NBR) rubber. The chlorine content may not be changed, however, as freely as the nitrile content. One of the CR ‘ s spread trading version is the Neoprene.
EPM, EPDM-ethylene-propylene rubber
The ethylene-propylene rubbers stand a much higher temperature than the majority of rubbers. It is used for the production of heat-resistant rubber-parts. permissible higher processing temperatures than at most other rubbers. Ethylene-propylene has a solid construction. Excellent ability of breathability, since tensile strength and elastic properties are very good .
SPECIAL PROFILE TYPES:
Edge-protection profiles: Here you can assign a variety of source material, and a good solution, for stable protection of no- bonding protection plates, plastic frames, and so on . More source material extruded even with a metallic attachment . EPDM cellular rubber coextruded with EPDM profile or soft PVC polymer .
"U" shape profiles: the U profile design makes it suitable for the protection of moving parts, plate-edges but can be used for aesthetic edge-closers.
Blankets and a "T" shaped profiles: in EPDM rubber profiles, or silicone T profiles: may be used as joins, gap-covers , seals. Thanks to its excellent weather and UV resistance are good for outdoor use. The silicone T profiles thanks to good heat-resistivity can also be applied as support of heat wires in welding equipment .
Flag or "P" shaped profiles: in EPDM or silicone rubber P profiles: can be used for sealing gaps in smaller windows, to insulate larger furnaces, dryers, plant -doors.
"D" shaped profiles: the D-shaped profile: EPDM rubber profiles or silicone profiles, also known as the tunnel profile, used in sealing techniques. Suitable for furnaces, glass sealing, reduction of slipping on glass sheets, vibration -cushioning. . In the case of special applications, petrol resistant, oil resistant, heat-resistant, acid-proof, etc. NBR, FPM, HNBR, ACM.
"L" shaped profiles: L profiles can be made of high purity not filled silicon materials by extrusion technology. Play an important role in edge banking. In the case of simpler application the profiles can be made from EPDM rubber.
Semi-circular profiles: the semi-circular profile is chemical-resistant has a wide range at temperature-tolerance and very flexible. Thanks to these properties are used for high-temperature distillation equipment and for furnaces.
"H"-shaped profiles
Door sealing profiles
Tube-shaped profiles
Corner protector profiles
Rolling door and thimbles profiles
Round-shaped profiles
Crown profiles
Rectangular profiles
Fastening and sealing profiles
Angle-shaped profiles
Stage clamp profiles
Bumper profiles
Glass edge protector rubber profilesGlazing profiles
Wearing profiles
Silicone sponge: the silicone sponge has a good heat and sound insulation, and excellent waterproof properties.
Rubber: rubber is a flexible material. Relating to most of the material it is highly deformable already at small force , and once after the deforming force ends it again takes on the shape of the original. The rubber based on raw rubber, which qualities determine to a large extent the properties of rubber. A wide variety of synthetic raw rubbers are made in chemical factories from crude oil and natural gas, in particular.
The rubber properties: the rubber is flexible, constructed soundly, have a higher tensile strength than the raw rubber. The exit of the long chains of molecules are bond by sulphur-bridges that form by the exit of hydrogen . The rubber can be considered as practically one big giant molecule. As a result of the drag the molecular chains are arranged next to each other, but do not tear off because of sulfur-bridges. This also causes that on the pulling power the material can be yield but with the end of pulling the flexible material regains its shape.
Vulcanisation: To change the properties of the rubber by chemical treatments.
Originally and (with the exception of certain synthetic rubber) are still mainly with sulphur. The method was invented by Charles Goodyear in 1839. The application enhances tensile strength, flexibility, and abrasion resistance.