MANUFACTURE OF FLUORINE-BASED COMPOSITE TUBE

摘要

PURPOSE:To efficiently manufacture flexible tube by a method wherein fluorine- based thermoplastic elastomer for forming the inner peripheral surface layer of the tube, general-purpose non-rigid thermoplastic resin for forming the outer peripheral surface layer of the tube and adhesive for both the resins as intermediate layer are extruded respectively through a common head die from respective extruders for manufacturing the tube for transferring ultrapure water or the like. CONSTITUTION:Fluorine-based thermoplastic elastomer layer 5 is formed by extruding fluorine-based thermoplastic elastomer for forming the inner peripheral surface layer of the tube concerned from a first extruder 1 through a common head came 4. Next, adhesive such as acrylic alkyl ester or the like is extruded from a third extruder 3 through the head die 4 so as to form bonding layer 6 on the outer peripheral surface of the fluorine-based thermoplastic elastomer layer 5. Next, general-purpose non-rigid thermoplastic resin selected from vinyl chloride-based resin group is extruded from a second extruder 2 so as to form general-purpose non-rigid thermoplastic resin layer 7 as the outer peripheral surface layer of the tube concerned in order to make tire three layers into an integral body.