Rubber compounds
Silica also has its place in the manufacture of technical rubber compounds, where fillers are needed to achieve the desired mechanical properties. As in other applications, it is the only reinforcing filler that allows the use of colours and minimises the staining often associated with carbon black. Its natural application is therefore in coloured parts such as gaskets, rollers, conveyor belts, rubber floors and ceilings, where colour and stain resistance are important.
However, although somewhat more difficult to process, virtually all parts can be formulated with silica, especially those rubbers that are more compatible with silica, such as SBR, BR, NBR and CR. Here it offers benefits in terms of tear resistance, even on black parts.
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Reforsil®
Precipitated silica from the Reforsil® range have a wide range of applications, the most important of which is in the reinforcement of elastomers, especially synthetic rubbers. However, silica is also used in other sectors such as the food industry, both human and animal, as a technological additive with anti-caking and/or fluidising properties, as a carrier for flavourings or other additives or active liquid substances, in agriculture as a milling aid or carrier, and in other sectors as diverse as the pharmaceutical industry or the paint and varnish industry.
As the name suggests, their main role is in rubber reinforcement, but the applications of these products are very wide.
Products
Type / Use
Reforsil® S180PD is a high reinforcement silica for elastomers, presented in powder form for easy incorporation and dispersion. Its performance is equivalent to the reference products in this application. Its use is particularly used in coloured rubber articles, where it offers excellent mechanical properties, allowing the use of any colour or colour combination. It is particularly suitable for use with NR, SBR/BR, NBR and CR, but can also be used with other polymers. It plays a special role in foamed parts because, if well dispersed, it influences the bubble size and therefore the density of the expanded rubber.
PRODUCT INFORMATION
Store in a dry place. These products have a shelf life of two years from the date of manufacture. When handling, take appropriate precautions as indicated in the safety data sheet.
Supplied in multi-ply paper sacks and in super sacks or Jumbo bags.
Type / Use
PRODUCT INFORMATION
Store in a dry place. These products have a shelf life of two years from the date of manufacture. When handling, take appropriate precautions as indicated in the safety data sheet.
Supplied in multi-ply paper sacks and in super sacks or Jumbo bags.
Type / Use
For special applications a less reinforcing silica may be required, which at the same time improves the processability of the raw rubber. This is the role of REFORSIL® S125, which provides the benefits of silica without making the compounds viscous or difficult to process, but with a loss of mechanical properties compared to REFORSIL® S180.
It is particularly recommended for injection moulding, as it allows good filling of the moulds and avoids problems of clogging of the injection channels. It is also recommended when silica is to be added to a blend containing carbon black as a reinforcing filler, as it has less effect on the workability of the blend.
PRODUCT INFORMATION
It is particularly recommended for injection moulding, as it allows good filling of the moulds and avoids problems of clogging of the injection channels. It is also recommended when silica is to be added to a blend containing carbon black as a reinforcing filler, as it has less effect on the workability of the blend.