Wegner & Bretschneider
Method of molding tubular laminate
 A method of molding a tubular laminate comprising joining flows of a plurality of thermoplasticized resins together to prepare a laminated composite flow having two side edges, and then passing the composite flow having two side edges through an annular extrusion die to abut both side edges of the respective layers to each other in the die, thereby forming an integrated tubular flow. 
Kureha Kagaku Kogyo Kabushiki Kaisha
Y B B B B
Y10T B29C B29C B29C B29C
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Kengo Yoshiharu
Yamazaki Nishimoto