| 摘要 |
<p>PURPOSE:To continuously produce a thermoplastic resin coated metal plate for a can at a high speed by thermal welding by laminating a polyethylene resin film composed of an ethylene repeating specific unit of which the single surface or both surfaces is subjected to the irradiation with specific radiation to a metal plate having a specific hydrated chromium oxide film and heated to the m.p. of a laminated film by thermal welding to quench the same. CONSTITUTION:In order to ensure the adhesion of a metal plate to be used to a laminated polyethylene resin layer, the surface of the metal has a hydrated chromium oxide film of 5-25mg/m<2> based on chromium as the uppermost layer. Further, the temp. of the metal plate immediately before the lamination of a polyethylene resin film is controlled to the range of the m.p. (Tm1) of the resin film - Tm1+240 deg.C when the laminated film is composed only of the resin film. Next, the quantity of the radiation applied to the polyethylene resin film before the lamination to the metal plate or the same resin layer after lamination is pref. set to the range of 1-25kc/kg. As the polyethylene resin containing 70-100mol% of an ethylene repeating unit, low density polyethylene, linear low density polyethylene or a mixture thereof is pref.</p> |
