초록 ▼

A sheet material, typically paper or cardboard, contains a natural, chemically untreated fibrous material and a secondary long-staple fiber material in a weight ratio comprised between (50-90):(10-50). It further contains fiber fines, at least one retention agent for these fines and at least one she

A sheet material, typically paper or cardboard, contains a natural, chemically untreated fibrous material and a secondary long-staple fiber material in a weight ratio comprised between (50-90):(10-50). It further contains fiber fines, at least one retention agent for these fines and at least one sheet strength improving agent. The sheet may be manufactured on paper making machines after preparing a mash from the components listed above and refining. The sheet material is intended to replace paper or cardboard normally made from chemically treated, expensive raw materials.

대표청구항 ▼

A wet laid sheet material containing natural fibers, comprising (A) a natural, chemically untreated kenaf fiber material having a length in the range of about 2 to 13 mm and (B) a natural cellulosic long-staple fiber material with the exception of mixed paper wastes and having a length different fro

A wet laid sheet material containing natural fibers, comprising (A) a natural, chemically untreated kenaf fiber material having a length in the range of about 2 to 13 mm and (B) a natural cellulosic long-staple fiber material with the exception of mixed paper wastes and having a length different from the length of fiber (A) in the range of about 2 to 15 mm, in which the weight ratio of components (A) and (B) is comprised in the range of from about 50 to 90 parts of (A) to about 10 to 50 parts of (B) based on a total weight of components (A) and (B) of 100 parts, and that the sheet material further contains fiber fines, at least one retention agent for the fines and at least one agent for improving the strength of the sheet material.