Moisture control material
Method of manufacturing an active moisture control material, wherein the material is formed from a base board comprising cellulose fibers and having a basis weight in the range of from 50 to 500 g/m2 and having a bulk of at least 1.2 cm3/g, wherein the method comprises a surface treatment of at least one side of said base board with a surface treatment composition comprising carboxymethyl cellulose (CMC) and a metal salt, wherein said surface treatment composition comprises carboxymethyl cellulose in a range of from 2 to 10 weight-% based on the total solid content of said surface treatment composition, and the metal salt in a range of from 10 to 30 weight-% based on the total solid content of said composition.
1. Method of manufacturing an active moisture control material, wherein the material is formed from a base board comprising cellulose fibers and having a basis weight in the range of from 50 to 500 g/m 2 and having a bulk of at least 1.2 cm 3 /g,
wherein
said method comprises a surface treatment of at least one side of said base board with a surface treatment composition comprising carboxymethyl cellulose (CMC) and a metal salt, wherein said surface treatment composition comprises carboxymethyl cellulose in a range of from 2 to 10 weight-% based on the total solid content of said surface treatment composition, and the metal salt in a range of from 10 to 30 weight-% based on the total solid content of said composition; and
wherein said surface treatment composition is applied onto the at least one side of said base board in an amount in a range of from 10 to 150 g/m 2 .
2. The method as claimed in claim 1 , wherein said surface treatment comprises applying said composition directly onto said at least one side of said base board.
3. The method of claim 1 , wherein said surface treatment is any one of a surface sizing and a coating operation.
4. The method of claim 1 , wherein the bulk is more than 1.5 cm 3 /g.
5. The method of claim 1 , wherein the surface treatment composition comprises the metal salt in a range of from 10 to 20 weight-% based on the total solid content of the composition.
6. The method of claim 1 , wherein said surface treatment composition is an aqueous suspension, having a dry content in the range of from 2 to 40%.
7. The method claim 1 , wherein said metal salt is selected from the group consisting of any one of a sodium chloride, calcium chloride, potassium chloride and sodium nitrate.
8. The method of claim 1 , wherein said base board is any one of a paper and a paperboard.
9. The method of claim 1 , wherein the basis weight of the base board is in the range of 110 to 500 g/m 2 .
10. The method of claim 1 , wherein the material is dried subsequent to the application of the surface treatment composition.
11. The method of claim 1 , wherein the material is pre-conditioned subsequent to the application of the surface composition.
12. The method of claim 1 , wherein the bulk is more than 2.0 cm 3 /g.
13. The method of claim 1 , wherein said surface treatment composition is an aqueous suspension having a dry content in the range of from 10 to 30%.
14. The method of claim 1 , wherein said surface treatment composition is applied onto the at least one side of said base board in an amount in the range of from 30 to 100 g/m 2 .
15. Method of manufacturing an active moisture control material, wherein the material is formed from a base board comprising cellulose fibers and having a basis weight in the range of from 50 to 500 g/m 2 and having a bulk of at least 1.2 cm 3 /g,
wherein
said method comprises a surface treatment of at least one side of said base board with a surface treatment composition comprising carboxymethyl cellulose (CMC) and a metal salt, wherein said surface treatment composition comprises carboxymethyl cellulose in a range of from 2 to 10 weight-% based on the total solid content of said surface treatment composition, and the metal salt in a range of from 10 to 30 weight-% based on the total solid content of said composition; and
wherein the material is pre-conditioned subsequent to the application of the surface composition.