CompositesWorld

AUG 2016

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29 CompositesWorld.com NEWS "Composites is typically seeing 4-5% annual growth," agrees OC's Skinner, based on well-documented substitution of composites for legacy wood and metal for the purpose of weight reduction and/ or corrosion prevention, but he also notes what he calls specialty features — specific durability or aesthetic, acoustic or weather- resistance requirements prized for building construction materials. Skinner adds that the European Union's REACH legislation, adopted to enhance human and environmental protection from risks posed by certain chemicals, also is driving sizing develop- ments. It's not just about low VOCs in sizing, but also about the highly specialized chemicals that are used in sizing to produce specific effects. "e REACH legislation has a hand in specifying approved chemicals," Skinner points out. So a big challenge for sizing chemists is to achieve the desired effect yet comply with the legislative environment. In other words, "How do we continue to innovate and respond to corporate social responsibility?" Pellegrini notes that among Aliancys' R&D efforts in VOC-free sizing formulations for reduced environmental impact, are sizing chemistries that meet new European regulations for parts in contact with food. "We are seeing more and more demand coming from the auto- motive industry," notes Gilles LeMoigne, Michelman's global industry manager, fibers and composites, as automakers turn to composites for fuel economy, and to alternative fuels — which are typically stored in composite pressure tanks — for cutting CO 2 emissions. Sizing for structural SMC for lightweight body panels also is on the table for its chemists. "Michelman aims for sizing designs that will help the auto industry meet the latest regulations for composites manufacture." ese include such goals as low or no volatile organic compounds (VOCs) in its sizing, and sizing that will meet specific targets for impact resistance or tensile strength. Sizing for glass/thermoplastics On the cutting edge of the custom-designed sizings trend are thermoplastic composites. Bassetti insists that any composite, and a thermoplastic in particular, is under-optimized when a general- purpose sizing is selected. "Again, our business is to specialize the interface and improve the composite performance," he says. But he cautions that the latest in thermoplastic sizing is still being developed and validated, and good products are not neces- sarily commercially available yet. In this arena, as well as in ther- mosets, he reminds us Michelman is working toward specific sizing targeted at different applications: Long-fiber thermoplastics (LFT) using polyamides (nylon) and polyolefins — polypropylene (PP) primarily — aimed, for example, at automotive seat backs, load floors, door modules and other interior parts. Skinner sees a general trend in resin selection from poly- ester and vinyl ester towards polyurethane (PUR) — a family of polymers with widely ranging properties that may be thermoset- ting or thermoplastic. "I expect the ability to effectively interact with the PUR matrix is going to become more important in the future," Skinner says. Smart Fiber Sizing ADVANCED MATERIALS FOR CFRP LATENT CURING AGENT FOR EPOXY RESIN Combination of P-0505 (Har ) and L-07E (Stabiliz with xy r v y xc t stor , low curing atur curing HIGH MECHANICAL PROPERTIES, HIGH Tg, FLAME RETARDANT THERMOSETTING RESIN SHIKOKU B ox an improv al and tardant pr r xy. CUREDUCT™ P-0505 / L-07E BENZOXAZINE P-d / F-a type VISIT US AT CAMX SEPT. 27-29 BOOTH T69 THE SLOVER GROUP (Sales representative) Vernon Clements | vernon_clements@slovergroup.com Tel: 713.468.1795 Ext.103 SHIKOKU INTERNATIONAL CORPORATION Yosuke Kurita | kuritay@shikoku.co.jp Tel: 714.978.0347 Ext. 102

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