초록 ▼

A multi-layer extrusion die wherein a temperature control mechanism for heating or cooling an inner layer resin is provided inside an inner layer resin flow path, and resins flowing through respective resin flow paths are each heated to a suitable temperature so as to eliminate possibilities of occu

A multi-layer extrusion die wherein a temperature control mechanism for heating or cooling an inner layer resin is provided inside an inner layer resin flow path, and resins flowing through respective resin flow paths are each heated to a suitable temperature so as to eliminate possibilities of occurrence of burning of the resin and the like.

대표청구항 ▼

A multi-layer extrusion die, for extruding thermoplastic resins to form a multi-layer tubular resin, wherein said die comprises: an inner and an outer layer resin flow path both of which are joined to each other in the vicinity of an extrusion slit; a first temperature control means disposed inside

A multi-layer extrusion die, for extruding thermoplastic resins to form a multi-layer tubular resin, wherein said die comprises: an inner and an outer layer resin flow path both of which are joined to each other in the vicinity of an extrusion slit; a first temperature control means disposed inside said inner layer resin flow path, a second temperature control means disposed outside said outer layer resin flow path; and a metallized film provided on a peripheral surface of said inner layer resin flow path.