Water activatable sheet, water activatable label using the sheet, method for producing the label, label applying apparatus using the label, and adherend having the label

A water activatable label to be applied to an adherend, which contains a paper material having on at least one surface thereof a porous water absorbing layer that has a liquid absorption volume of from 1 to 10 mL/m2, and further has provided on the water absorbing layer an adhesive layer containing an aqueous adhesive coated and solidified by drying.

A method for producing a water activatable sheet containing:

• printing on the printable layer of the paper material having on one surface thereof the porous water absorbing layer and on the other surface thereof a printable layer;
• and within a process of printing, coating and solidifying by drying an aqueous adhesive on the water absorbing layer of the paper material to provide the adhesive layer wherein the water activatable sheet contains a paper material having on at least one surface thereof a porous water absorbing layer that has a liquid absorption volume of from 1 to 10 mL/m2, and further has provided on the water absorbing layer an adhesive layer containing an aqueous adhesive coated and solidified by drying.

A water activatable label applying apparatus that supplies water to an adhesive layer of a water activatable label to reactivate the adhesive layer, and then applies the label to the adherend wherein the water activatable label contains a paper material having on at least one surface thereof a porous water absorbing layer that has a liquid absorption volume of from 1 to 10 mL/m2, and further has provided on the water absorbing layer an adhesive layer containing an aqueous adhesive coated and solidified by drying.

An adherend having a label, containing the water activatable label applied to the adherend, and having an adhesion strength between the label and the adherend of from 200 to 500 gf/15 mm after storing under an environment of 25° C. and 50% RH for one week wherein the water activatable label contains a paper material having on at least one surface thereof a porous water absorbing layer that has a liquid absorption volume of from 1 to 10 mL/m2, and further has provided on the water absorbing layer an adhesive layer containing an aqueous adhesive coated and solidified by drying.