A cellulose fiber-based substrate, at least one side of which is coated with an aqueous mixture composed of: a) at least one water-soluble polymer (WSP) containing hydroxyl groups, b) at least one lactone substituted with at least one linear or branched and/or cyclic C.sub.8-C.sub.30 hydrocarbon chain which may contain heteroatoms, c)at least one crosslinking agent. A method of production and use thereof.

Provided is a masking sheet for chemical solution treatment, the masking sheet comprising a substrate having first and second faces, and a PSA layer placed on the first face side of the substrate. The masking sheet is constituted so that penetration of a chemical solution is visually detectable when inspected from the outer face of the masking sheet.

A masking strip for masking the interior surfaces of a gap between two substrates to be painted is provided, the strip comprising: a backing having a first surface and a second surface, the first surface having an adhesive region to fix the masking strip to an interior surface of the gap; a gap filler extending from the backing and adapted to prevent paint flow into the gap; wherein the first surface of the backing is also provided with a spacing means adapted to space the backing of the masking strip away from the interior surface of the gap to which the strip is fixed, and wherein the masking strip is pre-formed.

An assembly is disclosed. The assembly has an adhesive layer, a protective film layer that is fused to a first side of the adhesive layer along a first length, and a cover layer that is fused to a second side of the adhesive layer along a second length. The first length is longer than the second length. The adhesive layer is wound in a roll. The second side of the adhesive layer faces outwardly from a center of the roll.

A tape assembly for masking an object to be painted and method of use is provided. The tape assembly is defined by a tape body having an anterior side, a posterior side, a body first edge, and an opposing body second edge. The tape body includes a first portion including a first substrate having a first adhesive layer on a posterior side of the first substrate, a second portion including a second substrate having a second adhesive layer on an anterior side of the second substrate, and a third portion including a third substrate having a third adhesive layer on a posterior side of the third substrate. The first and third portions partially overlap with the second portion in opposing first and second overlapping regions, respectively.

A multilayer tape is provided. A method of masking a surface is also provided. The multilayer tape includes an inner layer, at least one middle layer, and an outer carrier layer. The inner layer has a pair of parallel adhesive strips demarking an inner gap having a predetermined width. The middle layer is adhered to the inner layer and has a pair of parallel adhesive strips demarking a middle gap narrower than the inner gap. The outer carrier layer is adhered to the middle layer. The method includes applying a multilayer tape system to a surface and removing the outer carrier layer to expose a preselected gap width. The multilayer tape system includes an inner layer, at least one middle layer, and an outer carrier layer.

The invention is directed to masking tapes comprising reference lines that facilitate the use of adjacent edges or other linear features to place masking tape edges on irregular or curved boundaries between surfaces.

A masking film includes an adhesion layer that includes a blend of hydrogenated styrene block copolymer and low density polyethylene. The adhesion layer has an outer adhesion surface configured to contact a substrate. The outer adhesion surface has an average surface roughness Ra of between 100 nm and 350 nm, and an average spacing between peaks Sm of between 20 μm and 150 μm. The masking film also includes a release layer on a side of the adhesion layer opposite the outer adhesion surface.

An aqueous dispersion of a silicone pressure sensitive adhesive base can be combined with a curing agent and cured to form a silicone pressure sensitive adhesive. The aqueous dispersion of the silicone pressure sensitive adhesive base includes a bis-hydroxyl-terminated polydiorganosiloxane; a polyorganosilicate resin; cumene; a surfactant; and water. A curing agent such as a peroxide compound or an aminosilane may be combined with the aqueous disperison of the silicone pressure sensitive adhesive base to form a silicone pressure sensitive adhesive composition. A pressure sensitive adhesive article may be formed by a method including coating a surface of a substrate with the silicone pressure sensitive adhesive composition, removing water, and curing the silicon pressure sensitive adhesive composition to form a silicone pressure sensitive adhesive on the surface of the substrate.

A heat-treated non-oriented principal film including a cast (co)polymeric component that is not capable of thermally-induced self-forming. The heat-treated principal film has first and second opposed major faces and at least one modification zone on the first major face, each modification zone including a central portion and a rim portion surrounding the central portion. Each rim portion is surrounded by a land portion. An average thickness of each rim portion is greater than an average thickness of the land portion surrounding each modification zone, and an average thickness of each central portion is less than the average thickness of the land portion, or zero. The first major face of the heat-treated principal film may be positioned in contact with an oriented carrier film including a molecularly-oriented (co)polymer that exhibits a relaxation temperature (T.sub.r). Methods of making such films and hand-tearable adhesive articles including such films are also disclosed.