Patent ID: 8574693
Filing Date: 2013-11-05
Classification: B29B,B29C,B29K,B29L,C08J,C08K,C08L,Y10T

Abstract:
1. A preform formed by compounding a resin made from poly-L-lactic acid with a functional filler comprising D-lactic acid, preparing a resin shaped body comprising a mouth portion from the resin compounded with the functional filler and subjecting the mouth portion of the shaped body to a heat treatment, wherein the functional filler is formed by graft-polymerizing a compound having 2-4 hydroxyl groups with 30-50 molecules of D-lactic acid, the compound having 2-4 hydroxyl groups is selected from an inorganic compound of silica nanoparticles, trimethylol propane, and pentaerythritol, and an amount of the functional filler compounded is 5-20% by weight based on the poly-L-lactic acid.