| 摘要 |
<p>PURPOSE:To weaken the bonding strength between paper stock and resin covering layer and consequently facilitate the separation of the resin covering layer so as to facilitate the recovery and reuse of resin-covered paper by a method wherein the resin-covered paper is bought into contact with the steam of organic solvent under the condition that holes are bored in the resin covering layer so as to pass through the layer in order to reach the paper stock. CONSTITUTION:Resin-covered paper is used for waterproofing milk pack or the like by coveringly coating thermoplastic resin onto both the sides of paper stock. At the recovery and reuse of resin-covered paper, the separation between the paper stock and resin covering layer is necessary. In this case, firstly, the resin-covered paper 1.4 is fed between a vertically sliding type punching roll 10 so as to bore holes, which pass through the resin covering layer and reach the paper stock, in the resin covering layer. Next, by introducing the resin-covered paper 14 in an organic solvent tank 18, the steam 20 of organic solvent is brought into contact with the resin-covered paper 14 so as to weaken the bonding strength between the paper stock and the resin covering layer. In succession, by feeding the resin-covered paper 14 between a pair of separating blades 12 and 13 both the front and rear resin covering layers 17 and 15 are respectively separated from the paper stock 16.</p> |
