composites | Materials ASTM D790-10,B
7,000 6,000 5,000 4,000 3,000 2,000 1,000 0
HPR-803i 1 Micron Talc
product and is close to being commercialised. “we are approaching production status, and expect to be able to start shipping commercial quantities in january/ February 2012,” says roesler. the product is intended to compete with wood flour,
0 5 10 FLexuRAL MoDuLuS (1% SecAnT) ASTM D648-00A,B,455kPa
160 150 140 130 120 110 100
0 HPR-803i 1 Micron Talc 15 Loading (wt%) 20 25 30
calcium carbonate and talc fillers in plastics such as PP, HdPe and PA. in recent tests, it was shown to result in cost savings of 30% in a compound made of 60% PA 6 with 40% neroPlast, compared to an unfilled PA6. According to roesler, there is no other bio-based fibre/ filler which can be successfully compounded at the elevated temperatures required for polyamide or other engineering resins. Milliken chemical is aiming to take on glass fibres in
PP compounds with its synthetic mineral-based fibre reinforcement, which it is marketing under the Hyperform HPr brand. First launched at nPe in 2009, the additive is now being offered in an improved HPr-803i grade. Adam watson, global product line manager for the
5 10 HeAT DeFLecTion TeMPeRATuRe 15 Loading (wt%) 20 25 30
reinforcing agent, says the new grade has better handling and flow properties and offers 10% better stiff- ness at the same loading levels as its predecessor. it is initially being targeted at automotive interior applica- tions, where it can be used either as a standalone reinforcing agent or for use as a blend with talc. it is claimed to offer weight savings, scratch resistance, plus an excellent balance of stiffness and impact. watson anticipates that blends of HPr-803i and talc
Above: Milliken’s HPR- 803i reinforcing agent offers improved properties compared to 1 micron talc – tests performed in 35MFR interior-grade medium-impact PP copolymer
adding: “with twaron Black, it becomes part of the whole and maintains the same characteristics”. A new development in aramid-reinforced compounds has been announced by new Polymer Systems (nPS), which is offering thermoplastics reinforced with nano- scale aramid fibres that are said to have a much higher surface area for interfacial adhesion. company president jo roesler explains that the production of the new ArmorPlast compounds requires specialised equipment developed by nPS and, for the time being, they are only being manufactured in Germany. one of the first compounds is a PA6 with 10% by weight nano- scale aramid fibre.
Alternative options nPS is also active in the natural fibre reinforcement field with its neroPlast filler. this is a modified lignocel- lulose that is hydrophobic, providing a cost-effective, moisture- and temperature- resistant alternative to conventional fillers. the product was recently awarded the Green label by the USdA as a 100% bio-preferred
32 injection world | january/February 2012
are likely to take off first. For example, instead of a typical 20% loading of talc in PP, users could opt for loadings of 9% talc and 3% HPr-803i and gain similar results. target automotive applications include interior components, such as instrument panels, seat panels and console trim parts, plus exterior parts such as front and rear bumper fascia, door trims, lamp housings, and grilles. According to watson, there is also potential for using HPr 803i in other polyolefins, particularly HdPe, and in non-automotive applications.
click on the links for more information: ❙
www.3b-fibreglass.com ❙
www.rtpcompany.com ❙
www.jm.com ❙
www.camelyaf.com ❙
www.sabic-ip.com ❙
www.carbonxt.de ❙
www.teijinaramid.com ❙
www.newpolymersystems.com ❙
www.millikenchemical.com
A longer version of this article appeared in the october 2011 of compounding world magazine, which is a sister magazine to injection world.
www.injectionworld.com
HDT (˚c)
MPa
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