Plant-based plastics

Sharp Develops New Technology to Blend Plant-Based Plastic with Waste Plastic, Omnexus, July 12, 2005. 

Figure 3.17 Flowsheet of a waste plastic liquefaction plant based on thermal cracking and subsequent catalytic reforming [102]. (Reproduced by permission of the International Solid Waste Association (ISWA))...

Because of their particle shape and nature, cellulose and other plant based or organic drugs and pharmaceutical excipients often exhibit elastic properties. For that reason, as mentioned several times in this book (see, for example. Chapter 5 and Section 10.2), after fast compaction densified products may experience spring-back and loose structural integrity, strength, and/or quality as defined by a multitude of descriptions. To overcome possible problems, the rate of densification must be lowered to potentially unacceptable (technically and/or monetary) levels to allow conversion of temporary elastic alteration in shape and volume into permanent plastic deformation. 

Leather gloves were worn over the rubber gloves by all personnel to eliminate dermal hand exposure. Preliminary analyses of filter paper placed inside the rubber gloves indicated no penetration of I C paraquat. Leaves of each plant in a plot were stripped toward the plant base with the right hand while the tip of the stem was held in the left hand. The leaves were then stored in a plastic bag, which was sealed afterwards. 

Abstract Polyhydroxyalkanoate (PHA) initially received serious attention as a possible substitute for petrochemical-based plastics because of the anticipated shortage in the supply of petroleum. Since then, PHA has remained as an interesting material to both the academia and indusby. Now, we know more about this microbial storage polyester and have developed efficient fermentation systems for the large-scale production of PHA. Besides sugars, plant oils will become one of the important feedstock for the industrial-scale production of PHA. In addition, PHA will find new apphcations in various areas. This chapter summarizes the future prospects and the importance of developing a sustainable production system for PHA. 

Recyclability and sustainability All PO-based plastic interior or exterior part systems, theoretically at least, allow potentially easier recovery and reuse of components or shredder "fluff" when a vehicle s lifetime is over. Reduced environmental footprints are also being sought with the use of plant-based fillers and fibers for plastics. 

Protein-based plastics can be environmentally friendly and could even represent healthful products from tobacco plants. 

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