| 摘要 |
PURPOSE:To obtain a thermally shrinkable tube having an adhesive layer inside by a method in which electron rays are made to irradiate onto the outside of the tube of a thermoplastic resin, etc., in such a way as to an outer layer in which the portion from the outside to middle of the inside of the tube is bridged, and the tube is hot-pressed. CONSTITUTION:Electron rays from the acceleration tube 2 of an electron-ray irradiator consisting of a corpuscular ray source 1, the acceleration tube 2, a scanner 3, a beam introducer 4 and an emission window 5 are emitted at an acceleration voltage of 150-500eV preferably onto the outer surface of the tube of a thermoplastic resin or elastomer having a hot-bonding property in such a way that an outer layer 19 in which the portion from the outer surface to the middle of the inside of the tube is bridged is formed. The tube is pressed and expanded while being heated to the melting point or more and then cooled for solidification to obtain a thermally thrinkable tube having unbridged inner layer 20. |
