| 摘要 |
<p>A package comprising a sealed container containing a roll of wallcovering material which comprises a hydrophilic sub- strate layer, a pressure sensitive adhesive layer on one surface and, on the other surface, a decorative layer, usually including a layer of PVC or other plastics material. The wallcovering material is preferably self-wound on a roll. The moisture content of the wallcovering material is controlled in the package so as to provide a desire d area of the product which falls between the area of the product where it is soaked in water under predetermined conditions and t he area of the product when it is preconditioned un- der relatively dry, predetermined conditions. The moisture content is generally above the equilibrium content under normal am- bient conditions so that any problems caused by expansion of the product in use under humid conditions, such as bubbling and raising of the edges of the material at seams, are minimised. In a process f or producing the product the moisture content is moni- tored during the process, usually downstream from a drying stage, for instan ce the drying stage following application of an aque- ous adhesive.</p> |
