Method for manufacturing surface wear-resisting impregnated paper of laminate floor by dry-spraying Al2O3

Abstract

The invention relates to a method for manufacturing surface wear-resisting impregnated paper of a laminate floor by dry-spraying Al2O3. The method comprises the following steps: impregnating pure wood pulp roll paper with a melamine-formaldehyde (MF) resin liquid; uniformly spraying the Al2O3 on the surface of the impregnated paper by utilizing a dry sprayer; allowing the impregnated and sprayed paper to enter a first oven for drying at the temperature of 100-150 DEG C; roll-coating 300-500% (relative to the weight of the paper) of the MF resin liquid on the paper surface after preliminary drying; and allowing the roll-coated paper to enter a second oven for drying at the temperature of 100-150 DEG C, controlling the whole-course running speed of the paper at 10-12m/minute, cooling, adjusting the temperature of the oven and machine speed so as to reach 6.0-7.5% of volatile matters and 40-60% of pre-curing degree, cutting and packaging. By means of the method, the defects of the prior art are overcome, and the spray quantity of the Al2O3 can be adjusted by controlling the dry sprayer so as to obtain the surface wear-resisting impregnated paper with reliable quality according to different wear-resisting requirements; and the method has the advantages of reasonable process and obvious effect, and is simple in operation, thus effectively improving the product quality.

Description

technical field [0001] The invention relates to a dry spray Al 2 o 3 A method for manufacturing a wear-resistant impregnated paper for the surface layer of a composite floor. Background technique [0002] Add Al 2 o 3 The surface wear-resistant impregnated paper is widely used in various types of floors due to its excellent characteristics of wear resistance, transparency, simulation, and economy. At present, the production method of the wear-resistant paper mainly includes: one is to add Al in the production of base paper 2 o 3 , and then dipping, the problem with this method is that Al is dispersed on the surface of the paper 2 o 3 Particles, the operating environment has Al 2 o 3 Particles float, causing environmental pollution, greater equipment wear and high cost when producing impregnated paper and pressing floors; the second is wet spraying or wet coating, which is the Al 2 o 3 Mechanically mix or wet and disperse with melamine resin liquid, and then spray ...

AI Technical Summary

Problems solved by technology

At present, the production method of the wear-resistant paper mainly includes: one is to add Al in the production of base paper 2 o 3 , and then dipping, the problem with this method is that Al is dispersed on the surface of the paper 2 o 3 Particles, the operating environment has Al 2 o 3 Particles float, causing environmental pollution, greater equipment wear and high cost when producing impregnated paper and pressing floors; the second is wet spraying or wet coating, which is the Al 2 o 3 Mechanically mix or wet and disperse with melamine resin liquid, and then spray or roll coat. This method is simple in process and low in cost, but how to avoid Al 2 o 3 The settlement of particles in the glue and how to control the uniformity of spraying are important issues, which have not been completely resolved, and the wear and tear on the circulation system and equipment of the glue tank is still relatively large; the third is the mixed dry spraying method that has appeared in recent years. Take Al 2 o 3 Dry spraying after mixing with fiber powder makes up for the deficiencies of the first two methods, but due to Al 2 o 3 The specific gravity of fiber powder is quite different from that of fiber powder. Due to the influence of dry powder particle gravity and dispersion centrifugal force, it is difficult to achieve uniform distribution of particles and uniform spraying, which makes the wear resistance of the floor vary greatly in different parts, which seriously affects the surface layer. Production cost, production efficiency and application effect of wear-resistant impregnated paper

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