| 摘要 |
PURPOSE:To recover independently a resin coated layer and a paper basic material by making holes on the resin coated layer and subsequently irradiating ultrasonic wave thereon while being dipped in liquid having permeability. CONSTITUTION:Resin coated paper 17 is supplied to an up-and-down impulsive punching roller 10 at the same speed as that of a driving roller 2, and a receiving table 11, and it is provided with holes which pierces the paper 17 from the resin coated layer on its back surface to the resin coated layer on its front surface. Next, the punched resin coated paper passes through a forwarding roller 4 and is directed into a water tank 21 filled with liquid 22 having permeability to the paper base material, and then subjected to ultrasonic wave irradiation by an ultrsonic wave oscillator. Then, in the water tank 21 between forwarding rollers 5, 6, ultrasonic irradiation to the separating interfaces of the inside and outside resin coated layers and paper base layer is effected via water by means of ultrasonic oscillators 13, 14, and thereby liquid 22 permeation is promoted from the adhesive interfaces between the resin coated layer and the paper base layer, with result that the inside and outside resin coated layer and paper base material layer become a completely easily separable condition, and also the separating speed is increased. |
