Polylactic acid resin, preparation method thereof, and packing film comprising the same
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United States of America Patent
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Nov 22, 2016
Grant Date -
Jan 2, 2014
app pub date -
Nov 2, 2011
filing date -
Nov 2, 2011
priority date (Note) -
Withdrawn
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Abstract
The present invention relates to a polylactic acid resin and a packaging film comprising the same, wherein the polylactic acid resin is useful as a packaging material due to excellent properties including heat resistance as well as optimized flexibility. The polylactic acid resin comprises: a hard segment including a predetermined polylactic acid repeating unit; and a soft segment including a polyurethane polyol repeating unit in which certain polyether-based polyol repeating units are linearly connected in a medium of a urethane bond. In addition, the polylactic acid resin has a glass transition temperature (Tg) of 25-55° C.
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