The present subject matter provides a shrink film free of silicon-containing material, fluorine-containing material, and solvent-formed seams. The shrink film utilizes a water soluble layer covering an adhesive layer. The water soluble layer is in dry form and non-tacky, allowing processing of the shrink film subsequent to adhesive application to the shrink film. When the water soluble layer is dissolved, the adhesive layer is exposed and is capable of forming a permanent bond. The adhesive can be used to form a seam in the film and/or can be used to form a bond between the film and a substrate. The water soluble layer facilitates removal of an optional release liner from the adhesive. A substrate with the shrink film attached thereto and a related method of attaching a heat shrinkable film to a substrate are also disclosed.

The present subject matter provides a shrink film free of silicon-containing material, fluorine-containing material, and solvent-formed seams. The shrink film utilizes a water soluble layer covering an adhesive layer. The water soluble layer is in dry form and non-tacky, allowing processing of the shrink film subsequent to adhesive application to the shrink film. When the water soluble layer is dissolved, the adhesive layer is exposed and is capable of forming a permanent bond. The adhesive can be used to form a seam in the film and/or can be used to form a bond between the film and a substrate. The water soluble layer facilitates removal of an optional release liner from the adhesive. A substrate with the shrink film attached thereto and a related method of attaching a heat shrinkable film to a substrate are also disclosed.

An adhesive material that provides fast and robust adhesion on wet surfaces, where the adhesion formed is detachable on-demand. The adhesive material is formed of one or more hydrophilic polymers or copolymers grafted with one or more amine coupling groups via a plurality of cleavable physical bonds and/or cleavable covalent bonds and one or more cross linkers. Application of the adhesive material on a wet surface causes the adhesive material to absorb liquid to thereby swell the adhesive material to form a layer of hydrogel, resulting in the formation of temporary crosslinks followed by covalent crosslinks with the surface. Introducing a triggering agent cleaves the cleavable physical bonds and/or cleavable covalent bonds to allow for non-traumatic detachment of the adhesive material from the surface.

Described is an adhesive coating that can be applied, for example, to a surface of the insulation product. The adhesive coating includes between about 15-40% by weight of the adhesive coating of at least one of polystyrene-maleic anhydride (SMA) and polyacrylic acid (PAA), between about 15 and 50% by weight of the adhesive coating of a polyvinyl alcohol, between about 0.05% and 1.0% by weight of a homogenizer, and between about 20 and 40% by weight of the adhesive coating of a starch paste. The adhesive is activated with the application of liquid water.

The present invention relates to a moisture curable hotmelt adhesive composition comprising at least one polyurethane prepolymer obtained from the reaction of a) at least one polyether; b) at least one (meth)acrylic resin; c) at least one crystalline polyester; d) at least one amorphous polyester; e) at least one isocyanate compound; in a presence of a catalyst, wherein at least one of said polyether, crystalline polyester and amorphous polyester is partially or completely bio-based material.

A moisture-curing polyurethane composition includes at least one polyether urethane polymer P1 containing isocyanate groups and having a monomeric diisocyanate content of not more than 0.5% by weight, more than 20% by weight of carbon black, optionally not more than 2% by weight of a room temperature solid polyurethane polymer P2, obtained from the reaction of at least one monomeric diisocyanate with at least one at least semicrystalline polyester polyol or polycarbonate polyol in an NCO/OH ratio of at least 1.3/1, and optionally up to 5% by weight of a polyether urethane polymer P3, obtained from the reaction of at least one monomeric diisocyanate with at least one polyether diol having an average molecular weight M.sub.n of not more than 2500 g/mol in an NCO/OH ratio of at least 1.3/1, with the proviso that at least one of the polymers P2 and P3 is present in the composition.

Disclosed is a moisture reactive polyurethane hot melt adhesive composition that can be applied to substrates at a low coating weight even at application temperatures as low as 60 to 95 C. while retaining the advantageous high tack, green strength, cured bond strength and toughness of conventional high melting point polyurethane hot melt adhesives.

A water activated tape and method of producing is provided, the tape comprising a repulpable material, a water-soluble material affixed to the repulpable material, and a water activated adhesive layer affixed to the water-soluble material.

Described is an adhesive coating that can be applied, for example, to a surface of the insulation product. The adhesive coating includes between about 15-40% by weight of the adhesive coating of at least one of polystyrene-maleic anhydride (SMA) and polyacrylic acid (PAA), between about 15 and 50% by weight of the adhesive coating of a polyvinyl alcohol, between about 0.05% and 1.0% by weight of a homogenizer, and between about 20 and 40% by weight of the adhesive coating of a starch paste. The adhesive is activated with the application of liquid water.

Repulpable water-activated tapes, in particular reinforced laminated, water-activated paper tapes and methods of making the same are disclosed. The repulpable water-activated tape includes an outermost paper layer having a top surface and a bottom surface, a reinforcement adjacent to the bottom surface of the outermost paper layer, an innermost paper layer having a top surface and a bottom surface, the top surface of the innermost paper later adjacent to the reinforcement, at least a portion of a starch-based laminating adhesive disposed about each of the outermost paper layer, reinforcement, and innermost paper layer, and a water-activated adhesive adjacent to the bottom surface of the innermost paper layer. A repulpable starch-based laminating adhesive and tape comprising same is also described.