Coated barrier paper
AssigneeBillerud Aktiebolag (publ)
InventorsJohan A. Larsson, Thomas Gillgren, Wouter Prosper
Life of this patent
Estimating the term…
Abstract
The present disclosure provides coated paper product comprising: a paper substrate comprising a first and a second side; a first coating layer on the first side of the paper substrate, wherein the first coating layer comprises polyvinyl alcohol (PVOH), starch, starch-based biolatex, styrene-butadiene (SB) latex or a mixture thereof, wherein in case the first coating layer comprises SB-latex there is an SB-latex to pigment dry weight ratio of between 100:0 to 100:110; and a second coating layer on the first coating layer, wherein the second coating layer comprises EAA and talc, and wherein the dry weight ratio of EAA to talc in the second coating layer is between 100:5 and 100:70.
Claims20
A coated paper product comprising:
- a paper substrate comprising a first and a second side;
- a first coating layer on the first side of the paper substrate, wherein the first coating layer comprises polyvinyl alcohol (PVOH), starch, starch-based biolatex, styrene-butadiene (SB) latex or a mixture thereof, wherein in case the first coating layer comprises SB-latex there is an SB-latex to pigment dry weight ratio of between 100:0 to 100:110;
- and
- a second coating layer on the first coating layer, wherein the second coating layer comprises EAA and talc, and wherein the dry weight ratio of EAA to talc in the second coating layer is between 100:5 and 100:70.
A method of producing a coated paper comprising the steps of:
- providing a paper substrate comprising a first and a second side;
- and
- coating the first side of the paper substrate with a first coating layer, wherein the first coating layer comprises polyvinyl alcohol (PVOH), starch, starch-based biolatex, styrene-butadiene (SB) latex or a mixture thereof, wherein in case the first coating layer comprises SB-latex there is an SB-latex to pigment dry weight ratio of between 100:0 to 100:110;
- and
- coating a second coating layer on the second coating layer, wherein the second coating layer comprises ethylene-acrylic acid (EAA) latex and talc, and wherein the dry weight ratio of EAA latex to talc in the second coating layer is between 100:5 and 100:70.
A coated paper product comprising:
- a paper substrate comprising a first and a second side;
- a first coating layer on the first side of the paper substrate, wherein the first coating layer comprises ethylene-acrylic acid (EAA) or vinyl acetate acrylate copolymer (VAcA) or styrene-acrylate (SA) or acrylic latex;
- and
- a second coating layer on the first coating layer, wherein the second coating layer comprises EAA and talc, and wherein the dry weight ratio of EAA to talc in the second coating layer is between 100:5 and 100:70,
- a heat-seal coating layer on at least part of the second side,
- wherein the coat weight of the first coating layer is at least 4 g/m2, and
- wherein the coat weight of the second coating layer is at least 3 g/m2.
(canceled)
Dependencies are inferred from the claim text.