Impact modifiers | additives feature
manufacturers and consumers. Compounders can take advantage of XLT’s improved impact efficiency that enables lower elastomer loadings in the TPO while still delivering excellent impact performance. The lower elastomer loading results in higher TPO stiffness and melt flow and allows thin-walling for a reduced final part weight, which contributes towards fuel economy. Computer simulations have shown a reduction of up
to 10% in the total weight of a part made with Engage XLT. The simulations also demonstrate that the reduced wall thickness improves moulding cycle times, while the production of actual parts has shown improved demoulding characteristics for better part quality. Dow Elastomers marketing manager Dave Mitchell says: “This product represents the next advancement in TPO impact modification. The ability of Engage XLT to facilitate the production of lighter large parts with a faster mould time will allow compounders and manu- facturers to cost-effectively produce fuel-efficient vehicles without compromising quality.” Available in a free-flowing pellet form, the material
can be easily handled in large-scale continuous compounding operations. According to Dow, many of its compounding customers are selectively using the improved toughness-stiffness balance of Engage XLT to achieve very high modulus TPOs that also meet challenging low-temperature impact requirements. In addition to light-weight exterior components, it can be used in soft interior parts, such as air bag covers and instrument panels, with improved surface aesthetics. Dow Elastomers’ technology development leader Jim Hemphill says that Engage POEs are well established as impact modifiers for hard TPOs, but in the past few
years they have contributed to improvements in the performance and processability of both hard and soft TPOs. The Engage product line now offers a broad range of grades for the development of new proprietary TPO compound formulations that provide balanced performance in terms of processability, flexural modulus, impact and HDT. For hard TPOs, Dow has been working on improving impact efficiency, while on soft TPOs, the aim is for improved rheology to balance extrusion, calendaring and thermoforming. Last year, Lanxess launched a new ethylene-
propylene rubber that provides excellent compatibility with engineering thermoplastics like nylons and PBT.
Halsall’s Pack Away Garage
required extra impact
resistance to pass drop tests
Maag Group is the innovative solution provider for pump, pelletizing and filtration systems. We deliver high-quality components and complete systems, from extruder tips to pelletizers. In addition to our primary locations in Switzerland and Germany, we have eight sales and service offices around the globe to provide our customers with full service par excellence.
24 - 27 January 2012 hall FORUM, stand FE 55/53
brands of maag group
Automatik Plastics Machinery GmbH Ostring 19 ß 63762 Grossostheim ß Germany ß T +49 6026 503 0 ß
info@maag.com
Maag Pump Systems AG Aspstrasse 12 ß 8154 Oberglatt ß Switzerland ß T +41 44 278 82 00 ß
welcome@maag.com
www.maag.com
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