additives feature | Reinforcing fi bres
“A specifi c densifi cation process allows for DS 8800- 11P optimized bundle integrity and a bulk density that facilitate its handling,” claims 3B. “As a result this product exhibits an excellent feeding behaviour with a very limited fuzz generation.” Claudio Di Gregorio, 3B’s product leader for thermo-
plastics, says that growing restrictions related to food contact norms add severe limits to the design freedom of glass fi bre products, and that this normally results in a decrease of product performances associated with a higher cost and a product offering fragmentation. The new grade is also suitable for industrial
applications such as gears, bearing cages, impellers, fl ow meters, pump components, and similar parts. Johns Manville has developed a new range of
3B’s DS 8800-11P short glass fi bre reinforcement enhances high- temperature resins such as PPS
include resistance to fuzz generation and “outstanding” wet-out and dispersion. Melvin says compounders can run their lines up to 40% faster than with other fi bres. “These same features also allow for higher glass loadings, opening the door to new applications for Tier 1 and OEMs,” he says. The company has also introduced new chopped
Johns
Manville’s ThermoFlow chopped
strands offer increased
processing speed at higher glass loadings
strands for PBT and PET under the grade name of 272. It says this product is designed for use in short fi bre compounding applications requiring superior electrical insulation properties, dimensional stability, and wear resistance. Target applications include automotive electrical systems and connectors, electronic and electrical distribution applications, as well as a range of other machine parts and housings. As with Performax, 272 is said to allow for outstand- ing “no fuzz” feeding and handling. It processes well in harsh glass handling systems, such as pneumatic transport lines, and feeds smoothly at the extruder throat despite high temperature out-gassing. Its high thermal stability means discoloration at high tempera- tures is low, and its low yellow index means that it is well suited to “natural” applications. 3B earlier this year added to its range of short glass
fi bre reinforcements for high temperature resins. Grade DS 8800-11P is compatible with polymers such as polyethersulphone (PES), polyphenylenesulphide (PPS), polyetherimide (PEI), or polyetheretherketone (PEEK). It is suitable for food contact applications. Optimized dispersion behaviour allows its use even in highly viscous resins, and at loadings in excess of 55%. The supplier says DS 8800-11P exhibits very good
mechanical properties, especially stiffness and heat stability. Heat ageing and hydrolysis/glycolysis resist- ance are also said to be very good.
28 COMPOUNDING WORLD | October 2014
www.compoundingworld.com
ThermoFlow chopped strands and StarRov direct rovings offering increased processing speed at high glass loadings. Products are suitable for polyolefi ns, polyamides and high heat polymers. The company also recently realigned its Engineered Products organization from two regional units to a single global one. It says this will improve its sharing of best-practices.
Milling makes its mark Lanxess reports strong growth in demand for its milled short glass fi bres, especially in thermoplastics compounds as well as in reinforced reaction injection moulding with polyurethanes ( R-RIM). “They are gaining popularity for PTFE compounding when light-coloured components have to meet high optical requirements,” says Martin Wiemer, marketing expert for glass fi bres at Lanxess. “In most cases, time-consuming fi bre pre-treat- ments such as energy-intensive fl aming are not
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