Heat-resistant poly-L-lactic acid preform
AssigneeYoshino Kogyosho Co., Ltd.
InventorsMasahiro Sugai, Masato Suzuki, Hiromi Shimura, Junichi Chiba
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Abstract
A preform is formed by compounding a resin made from poly-L-lactic acid with a functional filler and subjecting a mouth portion to a heat treatment. Also, a hollow shaped product is produced by blow-molding the preform.
Claims9
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.
A method of producing a preform which comprises steps of:
- 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 through an extrusion molding;
- compression molding or injection molding 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.
Dependencies are inferred from the claim text.