| 摘要 |
PURPOSE:To obtain the title sheet with excellent heat fusing properties, beautiful product appearance and improved moldability by irradiating the surface of a sheet base material of a sheet prepd. by laminating a film only on one face of the sheet base material with a radiation beam to perform crosslinking reaction and foaming it by heating. CONSTITUTION:A crosslinked polyolefin foamed sheet is prepd. by laminating an olefin resin film on one face of a sheet base material of an olefin resin compsn. contg. an olefin resin, a foaming agent and a crosslinking agent, irradiating another face of a sheet base material with an ionized radiation and heating the whole system. A foamed sheet with excellent heat fusing properties, good appearance after molding and excellent molding processability is obtd. thereby. As the olefin resin, low density polyethylene and linear low density polyethylene are cited and as the foaming agent, azodicarbonamide and N,N'- dinitrosopentamethylenetetramine are cited. As the crosslinking agent, org. peroxides such as dicumylperoxide, di-t-butyl-peroxide and t-butylperoxycumene are cited. |
