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Co-Extruded BIo-Resin Zipper Profile

IP.com Disclosure Number: IPCOM000220655D
Publication Date: 2012-Aug-09
Document File: 3 page(s) / 55K

Publishing Venue

The IP.com Prior Art Database

Abstract

[1] The present invention relates to a coextruded bio-resin zipper profile, or, more specifically, to bioplastic materials that will generally replace conventional materials such as low density polyethylene (LDPE), high density polyethylene (HDPE) as well as polypropylene (PP) and polystyrene (PS). Packaging applications require these bioplastic materials to be extruded into thin films maintaining high tensile strength.

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COEXTRUDED BIO-RESIN ZIPPER PROFILE

[1]               The present invention relates to a coextruded bio-resin zipper profile, or, more specifically, to bioplastic materials that will generally replace conventional materials such as low density polyethylene (LDPE), high density polyethylene (HDPE) as well as polypropylene (PP) and polystyrene (PS). Packaging applications require these bioplastic materials to be extruded into thin films maintaining high tensile strength.

[2]               The global packaging industry is facing mounting economic pressures to reduce non-renewable waste, as more and more countries move to limit the commercial use of oil-based products. The increasing price and decreasing long-term availability of fossil resources has resulted in increasing calls for sustainable development. In recent years suppliers have been producing bio-based materials such as polylactic acid (PLA), a starch derivative made from corn and other high-starch plants, polyhydroxyalkanoates (PHA), using sugars, plant oils and bio­waste. The demand is growing as consumers' environmental concerns increase and as large retailers pressure food manufacturers into packaging goods in "green" materials. Some of the major issues faced with these biodegradable materials are the difficulty of processing. These biodegradable polymers, due to their heavy density, do not process or flow well in equipment designed for conventional Polyolefins such as LDPE, LLDPE, HDPE, PP, etc. In light of the demand for sustainability in the flexible packaging industry, the need to produce a zipper profile out of biodegradable/compostable materials is increasingly becoming inevitable.

[3]               The invented zipper profile was produced out of various blends of a biodegradable copolyester and polylactic acid (PLA), with increasing content of natural resources depending on the particular biodegradable polymer-blend and application. The base material of the zipper profile is dependent on the adequate content level of natural resources (PLA) to ensure proper profile formation. Useful biodegradable polymer-blends for use in embodiments of this invention are readily available in the market.

[4]               It is contemplated that the biodegradable polymer-blends used in the zipper profile include at least one of Bio-Flex F1110, Bio-Flex F1130, Bio-Flex F2110, Bio-Flex F6510, or Bio-Flex S1100. It is also contemplated that zipper profile may include combinations of one or more of Bio-Flex F1110, Bio-Flex F1130, Bio-Flex F2110, Bio-Flex F6510, or Bio-Flex 51100. The zipper profile may comprise 100 wt. % of Bio-Flex F1110, Bio-Flex F1130, Bio-Flex F2110, Bio-Flex F6510, or Bio-Flex S1100. In some embodiments, the zipper profile comprise from about 1 wt. % to about 99 wt. % of Bio-Flex F1110, Bio-Flex F1130, Bio-Flex F2110, Bio­Flex F6510, or Bio-Flex 51100. In other embodiments, the zipper profile comprise from about 5 wt. % to about 95 wt. % of Bio-Flex F1110, Bio-Flex F1130, Bio-Flex F2110, Bio-Flex F6510, or Bio-Flex S1100. I...