KR910004896A - Gypsum board paper and its manufacturing method - Google Patents

Abstract

No content.

Description

Gypsum press paper and its manufacturing method

As this is a public information case, the full text was not included.

Claims (6)

A water-repellent gypsum base paper whose water repellency is maintained at R ₃ or more by applying 0.2 g / m 2 to 0.8 g / m 2 of water-repellent agent selected from cationic synthetic resins, waxes and fatty acid salts. The base paper for water repellent plaster according to claim 1, wherein the base paper for plaster coverage comprises a surface layer, a surface layer, a wick layer, and a back layer. The base paper for plaster coverage according to claim 1 or 2, wherein the air permeability from the back layer to the surface layer of the base paper for plaster coverage is 100 seconds or less. The base paper for gypsum press according to claim 1 or 2, wherein the water repellency of the back layer of the base paper for gypsum press is R ₀ and the cup absorption rate is 80% or more. The base paper for gypsum press according to claim 1 or 2, wherein the water repellency of the back layer of the base paper for gypsum press is R ₃ and cup absorption is 25% or less. Commercial papers composed of newspapers, magazines, corrugated paper, bleached sulfuric acid pulp, and unbleached sulfuric acid pulp are prepared using paper machine, and the paper is composed of surface layer, surface layer, core layer, and backing layer. A method for producing a base paper for gypsum press, characterized in that at least one selected from acrylamide and paraffin wax fatty acid metal salt is coated with 0.2 g / m 2 to 0.8 g / m 2. ※ Note: The disclosure is based on the initial application.