| 摘要 |
<p>This method for the continuous production of sheets for wall coverings has the distinguishing feature that it uses a non-woven backing of fibreglass printed with ornamental designs of any kind by rotary screen printing of an adhesive, preferably an acrylic adhesive, capable of incorporating hard particles, such as sand, poured onto it uniformly in controllable quantities, when the area of backing to which it has been applied is about to pass around a low roll in a 180 DEG turn, thereby forming a V-shaped recess for collecting the falling hard particles and forcibly embedding them by the contact pressure of the non-woven backing on the semicylindrical surface of the turn roll, while hard particles lying on areas of the non-woven that are not covered with the printable adhesive are removed by suction and subsequent blowing before the processed sheet passes into an oven for drying of the abovementioned adhesive. <IMAGE></p> |
