Title:
【発明の名称】ダイオリフィス調節装置および流量制御装置を有する生分解性材料用押出し成形ダイ
Document Type and Number:
Japanese Patent JP2002514522
Kind Code:
A
Abstract:
An extrusion die for extruding biodegradable material, the extrusion die comprising: a mandrel (30); an outer member (40) positioned near the mandrel; an extrusion orifice (5) between the mandrel and the outer member; a member in communication with at least one defining member of the extrusion orifice, wherein the member is capable of producing relative movement between the outer member and the mandrel, wherein the relative movement has a component transverse to an extrusion direction of biodegradable material through the extrusion orifice; a flow control device which controls flow of biodegradable material through the extrusion die; and a positioning device which positions the outer member and the mandrel relative to each other. An improved process for the extrusion of biodegradable material wherein the extrusion comprises flowing the biodegradable material in a flow direction through an orifice, the improvement comprising: moving the biodegradable material in a direction having a component transverse to the flow direction during extrusion; controlling the flow rate of biodegradable material through the extrusion die during extrusion, wherein the controlling comprises adjusting the head pressure of the biodegradable material in the extrusion die and adjusting at least one cross-sectional area of a biodegradable material flow path within the extrusion die; and modifying the orifice geometry.
Inventors:
Frank, Hands Gee.
Bitner, Don Earl.
Bitner, Don Earl.
Application Number:
JP2000534387A
Publication Date:
May 21, 2002
Filing Date:
March 04, 1999
Export Citation:
Assignee:
Standard Starch, L.L.C.
International Classes:
B29C48/10; B29C48/33; B29C69/02; (IPC1-7): B29C47/24; B29C69/02
Domestic Patent References:
| JPH03155926A | 1991-07-03 | |||
| JPS6085946A | 1985-05-15 | |||
| JPS6422544A | 1989-01-25 |
Foreign References:
| GB1212182B |
Attorney, Agent or Firm:
Shusaku Yamamoto