ANALYSIS | ODOUR AND EMISSIONS
Right: Custom formulated antimicrobial masterbatches in production in the Sanitized technical centre in Switzerland
reduce or eliminate process-generated and end-product odours in wood-filled plastic com- pounds. The company says that the RP 17 additive has also proven successful for use in a variety of polymer resins and compounds that require the multi-functionality of lubrication, mould release, and odour reduction. It can be used in recycling applications, as well as automotive interior com- pounds, where odour neutralising or masking is a requirement. Struktol RP 53 comprises a blend of odour
neutralising chemistries and is claimed to be suitable for use with challenging high-odour compounds containing problematic species such as mercaptans, amines and phosphites. The product can be used in a variety of polymer resins but is primarily targeted at polyolefins. It can be used in recycling applications, as well as automo- tive interior compounds. RP 53 is sanctioned for use by the FDA in a number of applications. Struktol RP 59 contains odour neutralising and
VOC absorbers and is intended for difficult, high-odour and high volatile content compounds. It can be used in a variety of polymer resins but is also primarily targeted at polyolefins. The company says that RP 59 is effective in packaging applica- tions, where it can not only reduce or eliminate odours in the packaging polymer but also absorbs odours coming from the packaged product. Struktol says all three odour reduction additives
work at low loading levels and can be easily incorporated into processes such as compounding, direct extrusion and injection moulding.
Targeting microbes Microbial activity can be a source of odour, especially in PVC formulations. Antimicrobial additives from Swiss company Sanitized can protect flexible and rigid PVC end products from
56 COMPOUNDING WORLD | March 2020
bacterial infestation, growth of algae and mildew, material degradation, biofilms, pink stain and odours caused by microbes. The company says its antimicrobial additive is currently used in flooring, industrial coatings, artificial leather, roof mem- branes, pool liners and tarpaulins. Sanitized recently announced a strategic sales partnership with US-based Shawnee Chemical, which will offer the Sanitized products alongside its own PVC raw materials.
Sanitized has also invested at its technical centre
at Burgdorf in Switzerland to support customer- specific development of antimicrobial master- batches. It says that a custom configured twin screw extruder, installed last year, allows faster develop- ment of new masterbatch combinations and manufacture of test amounts of polymers with individual antimicrobial additives. The investment allows selection of the appropriate antimicrobial active ingredients to meet the client’s protection goals and for suitability with the relevant process- ing methods. The new twin screw extruder processes standard and technical polymers. Masterbatches of low to high-melt polymers can be produced in different formulations and finished compounds can be manufactured for testing and trials. A special feature of the machine is its nozzle plates, which allow direct extrusion of polymer strands and tapes for further examination in the Sanitized microbiol- ogy laboratory.
CLICK ON THE LINKS FOR MORE INFORMATION: �
www.ivv.fraunhofer.de �
www.alpha-mos.com �
www.markes.com �
www.struktol.com �
www.sanitized.com �
www.shawchem.com
www.compoundingworld.com
IMAGE: SANITIZED
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