| 摘要 |
<p>PURPOSE:To obtain lead plastic film with aesthetic surface by a method wherein lead foil is put on the lower melting point plastic film side of laminated plastic film and contact-bonded with each other by heating at a temperature, which is higher than the melting point of the lower melting point film and lower than that of the other plastic film. CONSTITUTION:The bonding of lead and lower melting point plastic film is performed by pressing lead foil and the lower melting point plastic film of co-extruded laminated film at a temperature higher than the melting point of the lower melting point plastic film. On the other hand, no bonding occurs between the laminated film and a hot pressing roll, even though the higher melting point plastic film side of the co-extruded laminated film contacts with the hot pressing roll, because the temperature of the roll is lower than the melting point of the higher melting point plastic film. In addition, the film is made into an integral body, because films with different melting points are molded by inflation method through co-extrusion.</p> |
