Manufacturing method for a film or product comprising an amphiphilic polymer

Patent metadata

Field	Value
Publication number	US-10358772-B2
Application number	US-201615739394-A
Country	US
Kind code	B2
Filing date	Jun 21, 2016
Priority date	Jun 26, 2015
Publication date	Jul 23, 2019
Grant date	Jul 23, 2019

Abstract

A method for manufacturing of a film, wherein said film is manufactured in a paper or paper board machine, wherein the method comprises the steps of providing a solution of a nanofibrillated poly-saccharide, wherein said solution comprises from 0.01 to 50 weight-% nanofibrillated polysaccharide, and wherein the nanofibrillated polysaccharide is any one of microfibrillated cellulose, nanofibrillated cellulose, nanocrystalline cellulose, microcrystalline cellulose, cellulose whiskers and cellulose derivative or a combination or mixture thereof, wherein the method further comprises the steps of providing an amphiphilic polymer; and providing a mixture of said amphiphilic polymer and said solution comprising nanofibrillated polysaccharide, whereby an intermediate solution is obtained; bringing said intermediate solution into a foam; providing said foam in the paper or board machine.

First claim

The invention claimed is:

1. A method for manufacturing of a film, wherein said film is manufactured in a paper or paper board machine, wherein the method comprises the steps of
providing a solution of a nanofibrillated polysaccharide, wherein said solution comprises from 0.01 to 50 weight-% nanofibrillated polysaccharide, and wherein the nanofibrillated polysaccharide is any one of microfibrillated cellulose, nanofibrillated cellulose, cellulose whiskers and cellulose derivative or a combination or mixture thereof,
wherein the method further comprises the steps of
providing an amphiphilic polymer;
providing a mixture of said amphiphilic polymer and said solution comprising nanofibrillated polysaccharide, whereby an intermediate solution is obtained;
bringing said intermediate solution into a foam; and
providing said foam in the paper or board machine.

2. The method as claimed in claim 1 , wherein the method further comprises the steps of:
supplying the foam to a forming fabric, for forming a foam web;
dewatering the foam web on the forming fabric;
subjecting the foam web to drying to form a paper or paper board product.

3. The method as claimed in claim 1 , wherein the method further comprises the step of applying said foam as a coating in said paper or board making machine.

4. The method as claimed in claim 1 , wherein the amphiphilic polymer is selected from any one of a octenyl succinic anhydride (OSA) starch, dodecyl succinic anhydride (DDSA) starch, hydrophobic modified ethylhydroxyethyl cellulose (HM-EHEC), hydrophobic modified hydroxyethyl cellulose (HM-HEC), hydrophobic modified carboxy methyl cellulose (HM-CMC), hydrophobic modified starch (HM-starch), hydrophobic modified nanocrystalline cellulose, hydrophobically modified polyvinyl alcohol, or a combination or mixture thereof.

5. The method as claimed in claim 4 , wherein the surface active polymer is octenyl succinic anhydride (OSA) starch.

6. The method as claimed in claim 5 , wherein the OSA starch is provided in an amount of 1 to 10 weight-% based on the amount of fibers in the solution of nanofibrillated polysaccharide.

7. The method as claimed in claim 1 , wherein the method further comprises the step of cooking the amphiphilic polymer in the presence of said microfibrillated polysaccharide.

8. The method as claimed in claim 1 , wherein the method further comprises the step of forming said nanofibrillated polysaccharide in the presence of said amphiphilic polymer.

9. The method as claimed in claim 1 , wherein the method comprises providing said foam as an additive to a wet end said paper or board making machine.

10. A paper or paper board product obtained by the method comprising the steps of,
providing a solution of a nanofibrillated polysaccharide, wherein said solution comprises from 0.01 to 50 weight-% nanofibrillated polysaccharide, and wherein the nanofibrillated polysaccharide is any one of microfibrillated cellulose, nanofibrillated cellulose, cellulose whiskers and cellulose derivative or a combination or mixture thereof;
providing an amphiphilic polymer;
providing a mixture of said amphiphilic polymer and said solution comprising nanofibrillated polysaccharide, whereby an intermediate solution is obtained;
bringing said intermediate solution into a foam; and
providing said foam in the paper or board machine.

11. The paper or paper board product as claimed in claim 10 , wherein said product is a barrier film or barrier coating having an oxygen transmission rate (OTR) of less than 20 cm3/m2/d measured at 50% relative humidity.

12. The paper or paper board product as claimed in claim 11 , wherein the product is a base paper and wherein the base paper has a basis weight or in the range of from 10 to 100 g/m2.

13. The paper or paper board product as claimed in claim 11 , wherein the product is a base paper and wherein the base paper has a basis weight or in the range of from 10 to 40 g/m2.

14. The paper or paper board product as claimed in claim 11 , wherein the product is a base paper and wherein the base paper has a basis weight or in the range of from 10 to 30 g/m2.

15. The paper or paper board product as claimed in claim 11 , wherein the product is a base paper and wherein the base paper has a basis weight or in the range of from 10 to 25 g/m2.

16. The paper or paper board product as claimed in claim 10 , wherein said product is a barrier film or barrier coating having an oxygen transmission rate (OTR) of less than 15 cm3/m2/d measured at 50% relative humidity.

17. The paper or paper board product as claimed in claim 10 , wherein said product is a barrier film or barrier coating having an oxygen transmission rate (OTR) of less than 10 cm3/m2/d measured at 50% relative humidity.

18. The paper or paper board product as claimed in claim 10 , wherein said product is a barrier film or barrier coating having an oxygen transmission rate (OTR) of less than 5 cm3/m2/d measured at 50% relative humidity.

Assignees

• Stora Enso Oyj

Inventors

• Heiskanen Isto
• Backfolk Kaj
• Saukkonen Esa Tapio
• Lyytikainen Katja Eliisa

Classifications

• D21H23/28

  Addition before the dryer section, e.g. at the wet end or press section · CPC title

• D21H21/56

  Foam · CPC title

• D21H19/54

  Starch · CPC title

• D21H19/34

  comprising cellulose or derivatives thereof · CPC title

• D21H19/10

  Coatings without pigments (D21H19/66 takes precedence) · CPC title