Stone paper coating process and device

Abstract

The invention discloses a stone paper coating process and device. Stone paper is unwound through a first unwinding mechanism, coating liquid for scrape coating of one surface of the stone paper is input into a coating mechanism, at the moment, a second unwinding mechanism can be selectively started to input a wet composite material, the material is wetly composited with the stone paper by a wet composite machine, then the stone paper is dried by a lower drying mechanism, then the stone paper is reversely rotated to the other surface of the stone paper, the other surface of the stone paper is subjected to the processes of coating, wet compositing and the like, then drying is conducted by an upper drying box, and finally, the stone paper is wound into a winding mechanism.

Description

Technical field [0001] The present invention relates to the technical field of coating ore substrate paper, in particular to a stone paper coating process and equipment. Background technique [0002] Stone paper is made by grinding limestone, calcite, marble, etc. into stone powder as the base material, and then mixing the stone powder with polyethylene and adhesive through a special process. The whole production process does not require wood pulp, no water, no strong alkali, Strong acid, bleaching agent, no waste water, waste gas, waste residue, in line with the world trend of low-carbon environmental protection, so the application range is getting wider and wider. [0003] Stone paper solves the problems of high energy consumption and high pollution of traditional plant fiber papermaking, and also solves the high cost of synthetic paper mainly composed of plastic resin. At present, stone paper has been widely used in the packaging field, and it has played a huge role in promotin...

AI Technical Summary

Problems solved by technology

[0006] However, the ore component in the raw material of stone paper accounts for more than 70%, and polyethylene and adhesive only account for less than 30%. If the traditional coating process is simply adopted, there are several problems: first, the composition of stone paper is different from that of fiber paper. During the coating process, the tension control of the stone paper needs to be re-explored, and the past experience cannot be applied

Second, because the surface characteristics of stone paper are between plastic synthetic paper and traditional plant fiber paper, the use of synthetic paper coating paint will cause the inorganic powder on the surface layer of stone paper to be pulled off during printing; use water-emulsion paint Due to the lack of adhesion of paper fibers, the bond between the coating and the base paper of stone paper is not strong

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