REPULPABLE REINFORCED WATER-ACTIVATED TAPE
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.
1 . A water-activated tape comprising:
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 layer 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.
2 . The water-activated tape of claim 1 , wherein one or both of the innermost paper layer and the outermost paper layer comprises bleached or natural kraft paper.
3 . The water-activated tape of claim 1 , wherein the reinforcement comprises tape, ribbon, or yarn of polymer and/or glass.
4 . The water-activated tape of claim 3 , wherein the reinforcement comprises uni-, bi- or tri-directional tape, ribbon, or yarn of polymer, glass, and/or water-soluble polymer.
5 . The water-activated tape of claim 1 , wherein the starch-based laminating adhesive comprises: one or more botanical or synthetic starches; one or more botanical or synthetic starches in combination with one or more polymers; one or more of a synthetic starch, a chemically-, an enzymatically-, a mechanically-, a thermally-modified botanical starch and blends thereof; or one or more of a synthetic starch, a chemically-, an enzymatically-, a mechanically-, and a thermally-modified botanical starch blended with one or more polymers.
6 . The water-activated tape of claim 1 , wherein the starch-based laminating adhesive is contiguous or semi-contiguous to the innermost paper layer, outermost paper, and the reinforcements.
7 . The water-activated tape of claim 1 , wherein the starch-based laminating adhesive further comprises a crosslinker and optionally a catalyst.
8 . The water-activated tape of claim 7 , wherein the crosslinker comprises one or more of a melamine resin or melamine polymer, alkoxylated melamine resin, bezoquamine resin, glycouril resin, urea resin, and mixtures thereof.
9 . The water-activated tape of claim 7 , wherein the catalyst is a blocked or unblocked sulfonic acid catalyst or mineral acid.
10 . The water-activated tape of claim 8 , wherein the water-activated adhesive comprises one or more of a botanical starch, synthetic starch, a chemically-, an enzymatically-, a mechanically-, a thermally-modified botanical starch, and blends thereof with one or more polymers.
11 . The water-activated tape of claim 1 , wherein the starch-based laminating adhesive: resists wetting during dispensing and activation of the water-activated adhesive; and has sufficient solubility for repulpability.
12 . A method of making a repulpable water-activated tape comprising:
laminating to a reinforcement using at least one starch-based laminating adhesive:
a top major surface of an innermost paper layer having a bottom major surface having a water-activated adhesive thereon; and
a bottom major surface of an outermost paper layer;
wherein the reinforcement is positioned between the top major surface of the innermost paper layer and the bottom major surface of the outermost paper layer.
13 . The method of claim 12 , wherein the starch-based laminating adhesive is contiguous or semi-contiguous to the innermost paper layer, outermost paper, and the reinforcement.
14 . The method of claim 12 , wherein the starch-based laminating adhesive comprises: one or more botanical or synthetic starches; one or more botanical or synthetic starches in combination with one or more polymers; one or more of a synthetic starch, a chemically-, an enzymatically-, a mechanically-, a thermally-modified botanical starch and blends thereof; or one or more of a synthetic starch, a chemically-, an enzymatically-, a mechanically-, and a thermally-modified botanical starch blended with one or more polymers.
15 . The method of claim 12 , wherein the starch-based laminating adhesive further comprises a crosslinker, and optionally, a catalyst.
16 . The method of claim 15 , wherein the crosslinker is one or more of methylated melamine formaldehyde, methoxymethylated melamine, ethoxymethylated melamine, propoxymethylated melamine, butoxymethylated melamine, hexamethylol melamine, ethoxymethylated melamine, propoxymethylated melamine, butoxymethylated melamine, bezoquamine resin, glycouril resin, urea resin, and mixtures thereof.
17 . The method of claim 15 , wherein the catalyst is a blocked or unblocked sulfonic acid catalyst or a mineral acid.
18 . The method of claim 12 , wherein the water-activated adhesive comprises one or more of a botanical starch, synthetic starch, a chemically-, an enzymatically-, a mechanically-, a thermally-modified botanical starch, and blends thereof with one or more polymers.
19 . The method of claim 12 , wherein one or both of the innermost paper layer and the outermost paper layer comprises kraft paper.
20 . The method of claim 12 , wherein the reinforcement comprises tape, ribbon, or yarn of polymer and/or glass.
21 . The method of claim 20 , wherein the reinforcement comprises bi- or tri-directional tape, ribbon, or yarn of polymer, glass, and/or water-soluble polymer.
22 . A starch-based laminating adhesive comprising:
one or more of a botanical starch and synthetic starch;
one or more of botanical starch and synthetic starch combined with one or more polymers;
one or more of a botanical starch, a synthetic starch, a chemically-, an enzymatically-, a mechanically-, and a thermally-modified botanical starch; or
one or more of a botanical starch, a synthetic starch, a chemically-, an enzymatically-, a mechanically-, a thermally-modified botanical starch combined with one or more polymers.