TECHNOLOGY | ELECTRICALLY CONDUCTIVE
Premix compound aids diagnostics
Finnish electrically conductive compound producer Premix has validated a new PP compound for production of in-vitro medical diagnostic pipettes using the latest addition to the Borealis medical polyolefin product line. The new application is based on Bormed BJ868MO high flow hetero- phasic PP copolymer, which Borealis says was developed to allow custom- ers to achieve full regulatory compli-
ance for production of medical devices such as pipettes more easily. It says that the Medical Device Regula- tion and In-Vitro Diagnostics Regula- tion in particular have brought in stricter procedures for conformity assessment. The new Premix compound offers electrical conductivity along with good impact resistance and easier process- ing – it can fill parts with a flow length to wall thickness ratio of up to 300 and
Its carbon fibre products for electrically conduc- tive compounds include milled carbon from 75 up to 300 microns. This is a fine powder which can be mixed with various materials and can have various lengths or sizings and can improve both the conductivity, mechanical properties and dimen- sional stability of thermoplastic and thermosets. A new milled carbon in granulate form of more than 300 microns is also now available. Douchy says the company has projects running with major compounders, specialised in technically high performance compounds for automotive, transportation, electrical/electronics, industrial, medical and consumer product applications. “We are looking at developing a sustainable easy dosing carbon fibre with a certain length that can be offered in large quantities and at a very competitive price compared with virgin carbon fibres,” he says. “The industry is waiting for such a product to allow more applications to benefit from the advantages of carbon fibres. The automotive industry has the biggest potential for further development.”
Right: LEHVOSS Group and Milliken collaborated to develop the Luvocom ESD compounds using Zelec electro-conduc- tive powders
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ESD alternatives LEHVOSS Group and Milliken have collaborated to develop Luvocom ESD compounds optimised with Zelec electro-conductive powder for consist- ent ESD (electrostatic dissipative) performance. The companies say that aerospace and automotive industries continue to pursue weight reduction and operational cost savings by replacing metals with high performance plastics. This trend presents significant challenges caused by the material interactions between metals and plastics.
Using traditional carbon-based COMPOUNDING WORLD | February 2019
at lower holding pressures and melt temperatures than alternatives, according to Premix. “We are pleased that this construc- tive collaboration with Borealis has enabled us to establish together a new benchmark for quality standards in in-vitro diagnostics materials,” says Noora Kuusisto, Global Business Development Manager at Premix. �
www.borealisgroup.com �
www.premixgroup.com
additives to achieve electrostatic dissipative properties in engineering thermoplastics may result in corrosion at aluminium alloy-thermoplastic interfaces, according to the companies. To over- come this problem, LEHVOSS has developed carbon-free PPS, PEEK and other high-perfor- mance ESD polymer compounds. “The success of this new generation of Luvocom ESD compounds results from the combination of our compounding and processing knowledge with the unique properties of Milliken Zelec electro-conductive powders”, says Thomas Collet, Marketing Director Customised Polymer Materials at LEHVOSS Group. Zelec particles combine a dense layer of crystallites of antimony-doped tin oxide on an inert core particle with a silica adhesion coating minimis- ing the risk of the conductive layer being damaged during high shear processing. This core-shell structure creates a highly efficient, cost-effective way of utilising antimony-doped tin oxide to dissipate electrostatic charge. “This robust struc- ture allows our customers to develop durable high-heat resistant compounds with long-term consistent ESD properties”, says Dr Philippe Scheerlinck, Senior New Business Development Manager EMEA at Milliken. Following the announcement last year that it was partnering with Integral Technologies subsidiary ElectriPlast to commercial- ise its specialty long fibre conductive compounds, PolyOne has rebranded the ElectriPlast products as Surround EMI/RFI Shielding Formulations. This portfolio of conductive thermoplastic materials can shield sensitive electronics from both electromag- netic interference (EMI) and radio frequency interference (RFI). The company says the
www.compoundingworld.com
PHOTO: LEHVOSS
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