ADHESIVE FOR CORRUGATED CARDBOARD FOR PREVENTING PACKAGE STACK CRUMBLING AND METHOD OF PREVENTING PACKAGE STACK CRUMBLING WITH THE SAME
The present adhesive for corrugated cardboard for preventing package stack crumbling is characterized by comprising a mixture of a petroleum resin emulsion containing a mineral oil and a water-soluble resin solution. Examples of the water-soluble resin include polyvinyl alcohol, sodium polyacrylate, carboxymethyl cellulose, hydroxyethyl cellulose, etc. The adhesive for corrugated cardboard is effecting for preventing package stack crumbling within a short period of drying time, and does not damage the surfaces of the corrugated cardboard when unpacking the package stack.
1 - 8 . (canceled)
9 . An adhesive for corrugated cardboard for preventing package stack crumbling, characterized by comprising a mixture of a petroleum resin emulsion containing a mineral oil and a water-soluble resin solution.
10 . An adhesive for corrugated cardboard for preventing package stack crumbling according to claim 9 , wherein the water-soluble resin is at least one resin selected from the group consisting of polyvinyl alcohol, sodium polyacrylate, carboxymethylcellulose, and hydroxyethyl cellulose.
11 . An adhesive for corrugated cardboard for preventing package stack crumbling according to claim 9 , wherein the ratio by weight of the mineral oil to the petroleum resin is 1:99 to 25:75.
12 . An adhesive for corrugated cardboard for preventing package stack crumbling according to claim 9 , wherein the mixing ratio of nonvolatile components in the petroleum resin emulsion is 20 to 90 wt % with respect to all the nonvolatile components in the adhesive.
13 . An adhesive for corrugated cardboard for preventing package stack crumbling according to claim 9 , wherein the mixing ratio of the water-soluble resin is 0.1 to 5 wt % with respect to the whole adhesive.
14 . An adhesive for corrugated cardboard for preventing package stack crumbling according to claim 9 , wherein the viscosity of the adhesive is 50 to 10,000 mPa·s.
15 . A method for preventing package stack crumbling of stacked corrugated cardboard boxes, comprising bonding the surfaces between the stacked cardboard boxes with the adhesive for corrugated cardboard for preventing package stack crumbling according to claim 9 .
16 . A method for preventing package stack crumbling of stacked metal cans, comprising bonding the surfaces between the stacked metal cans by using a corrugated cardboard sheet coated with the above adhesive for corrugated cardboard for preventing package stack crumbling according to claim 9 .