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US 5,413,829 AGranted
Self-adhesive wallcoverings
AssigneeForbo-CP Limited
InventorsKenneth D. Brown, David A. Williams
Life of this patent
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AssigneeForbo-CP Limited
InventorsKenneth D. Brown, David A. Williams
Estimating the term…
A package comprising a sealed container containing a roll of wall covering material which comprises a hydrophilic substrate 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 desired area of the product which falls between the area of the product where it is soaked in water under predetermined conditions and the area of the product when it is preconditioned under relatively dry, predetermined conditions. The moisture content is generally above the equilibrium content under normal ambient 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 for producing the product the moisture content is monitored during the process, usually downstream from a drying stage, for instance the drying stage following application of an aqueous adhesive.
A package comprising a sealed container in combination with a roll of wallcovering material for application to a wall in strips, said sealed container containing said roll of wallcovering material and said wallcovering material comprising in sequence a pressure sensitive adhesive layer, a hydrophilic substrate layer, a decorative layer and release surface, the adhesive layer of one winding being received on the release surface of the adjacent winding, in which said wallcovering material is such that it will undergo an increase in area from a dry area d to a wet area w of at least 0.1% of d when subjected to a wet expansion test, and wherein said wallcovering material in the package has an area which is such that
A process for producing a package containing a roll of wallcovering material in which there are applied to a web of hydrophilic substrate material, on one side a decorative surface layer and on the other side a layer of pressure sensitive adhesive and the product web is wound into rolls of successive windings with the pressure sensitive adhesive received onto a release surface of the adjacent winding in the product roll, and the roll is then enclosed in a sealed container, in which the wall covering material is such that it will undergo an increase in area from dry area d to a wet area w of at least 0.01% of d when subjected to a wet expansion test, and wherein the area of the wallcovering material when the roll is enclosed in the sealed container is in the range
A process for producing a package containing a roll of wallcovering material in which there are applied to a web of hydrophilic substrate material, on one side a decorated surface layer and on the other side a layer of pressure sensitive adhesive and the product web is wound into rolls of successive winding with the pressure sensitive adhesive received onto a release surface of the adjacent winding in the product roll, and the roll is then enclosed in a sealed container, in which the wall covering material is such that it will undergo an increase in area from a dry area d to wet area w of at least 0.01% of d when subjected to a wet expansion test wherein the process is carried out in the presence of moisture and the moisture content of the web before it is wound is determined.
A package comprising a sealed container in combination with a roll of wallcovering material for application to a wall in strips, said sealed container containing said roll of wallcovering material and said wallcovering material comprising in sequence a pressure sensitive adhesive layer, a hydrophilic substrate layer comprising hydrophilic fibers, a decorative layer and release surface, the adhesive layer of one winding being received on the release surface of the adjacent winding, in which said wallcovering material is such that it will undergo an increase in area from a dry area d to a wet area w of at least 0.1% of d when subjected to a wet expansion test and herein said wallcovering material in the package has an area which is such that
Dependencies are inferred from the claim text.