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Houston, TX, United States

Medlock G.,Kuraray
Web Coating and Handling Conference 2014 | Year: 2014

Ethylene Vinyl Alcohol copolymer (EVOH), a semi crystalline random copolymer of ethylene and vinyl alcohol, is widely and most commonly used in packaging structures for perishable food because of its superior barrier to oxygen. In addition to providing excellent oxygen barrier in food packaging, EVOH is capable of meeting other demanding requirements such as CO2 barrier for carbonated beverage bottles, hydrocarbon vapor barrier in plastic automobile fuel tanks, providing excellent chemical resistance for applications such as agriculture chemical bottles and barrier to fragrances and solvents in cosmetics. The high barrier performance of EVOH, even after abuse, has allowed for conversion from foil and metallized film laminations to co-extruded barrier films. EVOH can easily be co-extruded with all types of polyolefins, polyamides and other materials using standard extrusion equipment. EVOH is a hydrophilic material, so EVOH resin must be dry prior to extrusion processing. EVOH resins have poor adhesion to most polymers, so functionalized adhesive resins commonly called tie resins are used to bond the EVOH layer to other polymer layers in packaging structures. EVOH resins exhibit good thermal stability when used in properly designed extrusion systems with appropriate processing conditions. The scrap generated in polyolefin / EVOH coextrusion is commonly recycled as a regrind layer in sheet and bottle applications. Coextruded packages with EVOH can also be recycled post-consumer. Source

Schofer S.J.,Amyris Biotechnologies Inc. | McPhee D.J.,Amyris Biotechnologies Inc. | Moriguchi N.,Kuraray | Yamana Y.,Kuraray | And 3 more authors.
Rubber World | Year: 2014

Amyris has modified the common yeast Saccharomyces cerevisiae (baker's yeast) to produce vast quantities of the hydrocarbon trans-βfarnesene. Amyris has created a strain that instead converts the sugar into Biofene via 21 stereoselective enzymatic steps, some native and some heterologous to the host strain. Amyris has partnered with Kuraray to develop high performance polymers based on trans-β farnesene. The first product that Kuraray has developed during this collaboration is liquid farnesene rubber (LFR). Liquid rubber materials are colorless, transparent and almost completely odorless, and they have melt viscosities ranging from 1.5 to 1,500 Pa-s at 38 °C. The first application that LFR has been tested in is as a plasticizer additive in tire formulations, where it shows unique and improved performance. When trans-βfarnesene is used in hydrogenated block copolymers to make HSFC, a new polymer family is created which has unique and advantaged performance and offers the opportunity to broaden the range of applications for this class of materials. Source

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