| 摘要 |
<p>A method for the manufacture of a flexible container suitable for use as a water bed for livestock comprises providing a first layer (10) of a flexible polymeric material, applying mask means (13) to an inner zone of a first surface of said layer, said mask means being arranged spaced from edges of the first layer thereby to define a substantially continuous boundary zone (14), arranging a second layer of flexible polymeric material to lie adjacent said first layer with the mask means sandwiched therebetween and subjecting the assembly so formed to a treatment operation thereby to form a face to face seal between said boundary zone and the confronting surface region of the second layer.</p> |
