A method for producing leather release type base paper

Abstract

The invention belongs to papermaking techniques and relates to a method for producing leather release type base paper. According to the method, base raw materials which are bleached sulfate softwood pulp and bleached sulfate hardwood pulp are subjected to steps of pulping, pulp preparing, sizing, papermaking with pulp, drying for the first time, surface sizing, after-drying, calendaring, and taking up in order to obtain finished-product paper; auxiliary raw materials are added in process steps; according to a material transferring sequence, materials in the pulping step pass through a pulper, a before-beating pulp pool, a pulp grinding machine and an after-beating pulp pool in order; materials in the pulp preparing step pass through a pulp preparing pool, a transit pulp pool, a paper machine pulp pool and a high-attitude tank in order; materials in the sizing step pass through a first pulp washing pump, a slag separator, a second pulp washing pump and a pressure sieve in order; materials in the papermaking step pass through a head box, a screen part and a squeezing part in order. The base paper produced by the method has good uniformity, fine and smooth paper surfaces, high strength, proper anti-permeation performance and good heat resistance and can adapt to requirements if subsequent leather production processes.

Description

technical field [0001] The invention belongs to papermaking technology and relates to a production method of leather release base paper. Background technique [0002] With the development of the economy, my country's synthetic leather industry is developing rapidly. As an important carrier of synthetic leather, the demand for leather release paper is also increasing. But so far, the required leather release paper is still heavily dependent on Imports, untimely supply, high cost, etc. seriously restrict the rapid development of the domestic artificial leather industry. [0003] Leather release paper is composed of base paper and coated release layer. Base paper is also very demanding as its basic part. At present, there are relatively few researches on base paper in China, and there is no mature technology that can produce high-quality leather release paper base paper. Contents of the invention [0004] The technical problem to be solved by the present invention is to provi...

AI Technical Summary

Problems solved by technology

[0002] With the development of the economy, my country's synthetic leather industry is developing rapidly. As an important carrier of synthetic leather, the demand for leather release paper is also increasing. But so far, the required leather release paper is still heavily dependent on Imports, untimely supply, high cost, etc. seriously restrict the rapid development of the domestic artificial leather industry

[0003] Leather release paper is composed of base paper and coated release layer. Base paper is also very demanding as its basic part. At present, there are relatively few researches on base paper in China, and there is no mature process for producing high-quality leather release paper base paper.

Images