I have blogged here in the past against the use of bioplastics as a solution to the solid waste problem. They don’t degrade in properly built landfills and they can foul recycling streams. I was at a meeting last Wednesday, however, where the biopolymer producers seem to be improving their case.
Stefan Facco of Novamont said that the European Commission ranks composting on an equal level with recycling as a way to reduce waste. The only strategies ranking higher are waste reduction and re-use. Novamont is targeting food-service applications such as fast-food restaurants and cafeterias where it’s too time-consuming or energy intensive to wash food waste off plates or utensils. Those materials would go into a composting stream instead of a recycling stream. The extent to which those types of composting systems will be developed, however, still remains to be seen. That’s the only case to me that may make sense for use of biodegradable plastics for food service products. Use of degradable plastic for agricultural mulch is a no-brainer and is already an important product. The cost of the starch-based bioplastics made by Novamont, however, still cost two to five times more than the commodity plastics they replace. Given that, might incineration of additive-free plastics in a waste-to-energy plant make more sense?
Producing high-quality end-production metal parts with additive manufacturing for applications like aerospace and medical requires very tightly controlled processes and materials. New standards and guidelines for machines and processes, materials, and printed parts are underway from bodies such as ASTM International.
Although plastics make up only about 11% of all US municipal solid waste, many are actually more energy-dense than coal. Converting these non-recycled plastics into energy with existing technologies could reduce US coal consumption, as well as boost domestic energy reserves, says a new study.
This year's Dupont-sponsored WardsAuto survey of automotive designers and other engineers shows lightweighting dominates the discussion. But which materials will help them meet the 2025 CAFE standards are not entirely clear.
Artificially created metamaterials are already appearing in niche applications like electronics, communications, and defense, says a new report from Lux Research. How quickly they become mainstream depends on cost-effective manufacturing methods, which will include additive manufacturing.
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