Water-resistant sandpaper base paper and production method thereof

Abstract

The invention discloses water-resistant abrasive base paper and a production method thereof. The water-resistant abrasive base paper is prepared from the following raw materials in parts by weight: 32-35 parts of softwood pulp fibers, 32-35 parts of hardwood pulp fibers, 5-10 parts of polyester fibers, 10-15 parts of modified thermoplastic resin, 3-5 parts of a water-proofing agent and 3-5 parts of an oil-proofing agent. The preparation method comprises the following steps: (1) mixing, crushing, pulping and repulping the softwood pulp fibers, the hardwood pulp fibers and the polyester fibers in parts by weight; (2) starching by a fourdrinier machine; (3) molding and drying a paper sheet on the fourdrinier machine, and carrying out gumming treatment once online, wherein the glue quantity is 10%-15%; (4) after drying the glue obtained in the step (3), carrying out secondary gumming on the front surface of the paper sheet, wherein the glue quantity is 6%-10%; and (5) calendaring the paper sheet which is gummed for the second time in the step (4) by a soft calendar. The Water-resistant abrasive paper prepared from the water-resistant abrasive base paper has the advantages of good waterproofness, softness, solvent resistance, dimension stability, high dry strength, good high temperature resistance and good weathering resistance.

Description

technical field [0001] The invention belongs to the technical field of sandpaper base paper, and in particular relates to a water-resistant sandpaper base paper and a production method thereof. Background technique [0002] Water-resistant sandpaper base paper is the substrate for the production of water-resistant sandpaper, and the coated abrasives made of it account for a considerable proportion of the entire coated abrasive products. A large part of the base paper used in medium and high-grade water-resistant sandpaper is imported. Since the base paper of water-resistant sandpaper is a special industrial paper, the market is relatively narrow and the consumption is not large. The annual domestic market is less than 20,000 tons. With the acceleration of my country's industrialization process, nearly There has been a large growth in the past few years, but due to the special requirements for water-resistant sandpaper base paper, the country has almost no base paper research ...

AI Technical Summary

Problems solved by technology

A large part of the base paper used in medium and high-grade water-resistant sandpaper is imported. Since the base paper of water-resistant sandpaper is a special industrial paper, the market is relatively narrow and the consumption is not large. The domestic market is less than 20,000 tons per year. With the acceleration of my country's industrialization process, nearly There has been a large growth in the past few years, but due to the special requirements of water-resistant sandpaper base paper, the country has almost no base paper research and development and technical support. In the planned economy, several state-owned base paper manufacturers were completely disintegrated, closed or converted, so there are very few base paper manufacturers. , but high-grade water-resistant sandpaper base paper, due to the gap between the process equipment and foreign countries, cannot meet the requirements of coated abrasive manufacturers at present. It is necessary to accelerate innovation and improve R&D capabilities and manufacturing levels.

[0005] Problems existing in the traditional water-resistant sandpaper base paper: 1. The oil-proof performance of the water-resistant sandpaper base paper is insufficient, resulting in a large amount of glue seeping into the paper when applying glue during sand planting, causing the sand to stick firmly and affecting the grinding performance

2. The base paper of water-resistant sandpaper is too brittle and the toughness of the paper is low, especially when it is dried at high temperature after sand planting, it is more likely to cause frequent paper breaks, which seriously affects normal production and yield

3. Water-resistant sandpaper base paper produced by traditional methods has poor weather resistance and is greatly affected by the environment. Newly produced base paper needs to be matured for two days or even a week before it can be used, and changes in seasons, room temperature, and weather will affect the performance of water-resistant sandpaper base paper. Performance