coloured interior PP foam products to be produced with no additional residual VOCs being introduced into the formulation, or generated during processing due to degradation of the black masterbatch, Colloids claims. The third new product extends the company’s existing T-TEC high-temperature masterbatch range designed for high-performance engineering polymers used in automotive, electrical, industrial and consumer appliances. The latest addition is a new Signal Orange (RAL 2003) grade, which is the regulation colour specified by hybrid and all-electric vehicle engine manufacturers for high-voltage electric cable and connector applications. The T-TEC range can be supplied in either Colloids’ proprietary universal carrier, which is suitable for small mouldings, or in a specific polymer carrier. For highvoltage engine component applications, T-TEC Signal Orange (RAL 2003) is now available in a polyetheretherketone (PEEK) carrier, which provides resistance to continuous temperatures up to 200°C (392°F), with short-term resistance up to 260°C (500°F), the company reports. Colloids also used the Chinaplas trade show to promote its recently introduced L-TEC range of laser marking compatible masterbatches [ADPO, January–February 2019, p. 2]. These products enable plastic components to be permanently laser marked or etched with key product information and branding in either a light or dark mark instead of ink printing or engraving; text, numbers, QR and bar codes, images and logos can be clearly laser marked on a plastic part, according to the company. L-TEC laser marking masterbatches or compounds are custom-formulated depending on the polymer grade, colour and type of laser mark required, optimized for line speed and marking sharpness, it explains. Already available for a wide range of polymers, the latest R&D trials have successfully demonstrated that a bespoke L-TEC masterbatch can now also be produced for thermoplastic elastomers (TPE) and clear rigid plastics, such as polycarbonate, polyethylene terephthalate, polymethyl methacrylate, general purpose polystyrene and styrene acrylonitrile, providing greater definition, contrast and considerably higher marking speeds, Colloids reports. The Colloids Group, which is part of the multinational Tosaf Group, has sales, production and R&D facilities in the UK and China, supplying high-quality masterbatches, compounds and additives to original equipment manufacturers, convertors, polymer producers and compounders worldwide. Its products serve the automotive, agricultural, electrical and electronics (E&E), construction, pipes, geosynthetics, consumer goods, and packaging markets. More information: www.colloids.com
Additives for Polymers
Riverdale Global’s latest liquid additive enhances the properties of recycled polyolefins
S-based Riverdale Global, a manufacturer of sealed liquid colorants and additives for the plastics industry, has extended its GlobalPlus™ product line [ADPO, March 2016, p. 4] with a new additive product designed to boost the retention of physical properties during the reprocessing of recycled polymers. The company reports that ‘positive results’ have been obtained using its new +Restore™ additive in the recycling of commodity resins such as polyolefins. According to Riverdale Global, the new liquid additive can reduce the polymer degradation that takes place during the melt processing of recycled polymers, ‘substantially increasing’ the preservation of physical properties in regrind when compared with those of reprocessed, unmodified material. For example, test results published by the company show that the notched Izod impact strength of a reground, unmodified homopolymer polypropylene (PP) fell to about half that of the virgin resin after reprocessing. In contrast, reground and reprocessed homopolymer PP containing the +Restore additive exhibited a notched Izod impact strength of around 82% compared to the virgin material’s level, that is, some 65% higher than that of the unmodified regrind. Riverdale Global reports that improvements have also been achieved with recycled PP copolymer and high density polyethylene (HDPE). Typical usage rates for the +Restore additive are in the 0.1% to 0.5% range, according to the company. Processors can use the new liquid product to enhance the physical properties of virgin materials; however, the ‘most dramatic results’ are exhibited in recycling, Riverdale Global claims. ‘+Restore enables recyclers to obtain physical properties much closer to those of virgin polymer than with unmodified regrind’, comments the company’s technical sales manager Jared Arbeter. Riverdale Global’s latest innovation expands the end-use possibilities for recycled polymers, opening new applications in moulded or extruded products, including fibres, Arbeter says. The new additive can be used alone or in a blend with the company’s liquid colours.
More information: www.riverdaleglobal.com