| 摘要 |
A method for the manufacture of a flexible container suitable for use as a water bed for livestock comprises providing a first layer of a flexible polymeric material, applying a mask insert to an inner zone of a first surface of the first layer, the mask insert being arranged spaced from edges of the first layer thereby to define a substantially continuous boundary zone, arranging a second layer of flexible polymeric material to lie adjacent the first layer with the mask insert sandwiched therebetween, and subjecting the assembly so formed to a treatment operation thereby to form a face to face seal between the boundary zone and the confronting surface region of the second layer. |
