Poly(3-hydroxybutyrate) resin tube and method for producing same
AssigneeKaneka Corporation
InventorTetsuo Okura
Life of this patent
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Abstract
Provided is a poly(3-hydroxybutyrate) resin tube including a poly(3-hydroxybutyrate) resin, the tube having a wall thickness of 0.1 to 0.6 mm. The difference between the melting point peak temperature and the melting point peak end temperature in differential scanning calorimetry analysis of the poly(3-hydroxybutyrate) resin is preferably 10° C. or higher. Preferably, production of the tube includes the step of melting a poly(3-hydroxybutyrate) resin in an extruder, then extruding the resin from an annular die, and introducing the resin into water, the annular die temperature being set to a temperature between the melting point peak temperature and the melting point peak end temperature in differential scanning calorimetry analysis of the poly(3-hydroxybutyrate) resin.
Claims7
A method for producing a poly(3-hydroxybutyrate) resin tube comprising a poly(3-hydroxybutyrate) resin, the method comprising:
- mixing at least two types of poly(3-hydroxybutyrate) resins to obtain the poly(3-hydroxybutyrate) resin;
- melting the obtained poly(3-hydroxybutyrate) resin in an extruder;
- extruding the melted poly(3-hydroxybutyrate) resin from an annular die;
- and
- introducing the extruded poly(3-hydroxybutyrate) resin into water,
- wherein a temperature of the annular die is set to be between a melting point peak temperature and a melting point peak end temperature in differential scanning calorimetry analysis of the poly(3-hydroxybutyrate) resin,
- wherein the tube has a wall thickness of from 0.1 to 0.6 mm, and
- wherein a difference between a melting point peak temperature and a melting point peak end temperature in differential scanning calorimetry analysis of the poly(3-hydroxybutyrate) resin is from 10° C. to 30° C.
Dependencies are inferred from the claim text.