The use of suitable release agents, known as anti-tacks, can prevent undesired surface tackiness on unvulcanised rubber compounds. Anti-tacks from the PROMOL® SL series are designed for a wide range of compounds and are formulated to deliver excellent compound compatibility. Supplied as concentrated liquids, they are diluted with water to provide the user with a dispersion suitable for treating compounds in the form of sheets, strips, extrusion products or blanks, such as by dipping or spraying. After drying, the film that forms on the surface of the rubber compounds delivers excellent release properties and optimised lubrication to facilitate extrusion.
The excellent wetting characteristics result in very uniform film formation. In combination with the excellent release properties, this allows users to achieve very low rates of consumption. In turn, this means that only small quantities of the release agent, which is not usually part of the actual compound formula, are introduced into the compound during subsequent processing.
Using the products also helps to improve the cleanliness of the installations and the surrounding area; in a batch-off system, for example, the festoon bars in the cooling section remain largely free of soapy residues. The ready-to-use dispersion produces barely any foam – even in the event of increased air entrainment. The products also deliver effective and long-lasting protection against microbes, preventing undesired decomposition, which reduces the product performance and forms unpleasant odours.
Products from the PROMOL® SL series are ideal for the typically very demanding anti-tack requirements of custom compounders: they contain absolutely no fillers, which could cause disruption during subsequent processing into technical rubber goods. Moreover, all of the release agent’s constituents are completely meltable at relatively low temperatures.
In addition to the actual products, BARBE also provides technical equipment for their reliable, automated handling, such as for the preparation of ready-to-use dispersions by dilution of the supplied concentrate.
A selection of grades from the PROMOL® SL series: