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A kind of preparation method of release paper for anti-curling easy-peeling leather

A technology of easy peeling and release paper, applied in special paper, paper, papermaking and other directions, can solve the problems of artificial leather surface silky smooth and oily wax feeling, artificial leather is not easy to peel off, not easy to curl, etc., to achieve good surface gloss. , the effect of moderate peeling and moderate peeling strength

Active Publication Date: 2018-01-05
肇庆凯盛电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem mainly solved by the present invention: the release paper prepared by the current technology is easy to curl in a humid environment, the artificial leather is not easy to peel off from the release paper during preparation, and the surface of the prepared artificial leather has a poor silky and oily waxy feeling Problem, provide a kind of preparation method of release paper for anti-curling easy-peeling leather, this method first makes the fresh leaf of Pittosporum flower into granules, mixes and fixes with glutaraldehyde aqueous solution, stirs and heats with n-hexane subsequently, then evaporates to The waxy concentrate of Pittosporum flower leaves is dried, and it is beaten, refined, and ultrasonically dispersed with Populus euphratica wood pulp board and deionized water to obtain a modified wood pulp dispersion slurry, which is then used for papermaking. , pressing treatment to obtain dry modified paper, and then use polyvinyl alcohol as the main raw material to prepare a coating solution to coat the modified paper, and after the paper is dried and cooled, a release agent for anti-curling and easy-peeling leather can be obtained. Type paper, the present invention extracts the wax of Pittosporum flower leaves, so that it is evenly loaded on the surface of Populus euphratica wood fiber. Since the Populus euphratica wood fiber contains a large amount of inorganic salts, the paper prepared from Populus euphratica wood fiber has better water resistance and peel strength. Moderate, good release property, not easy to curl in wet environment or wet condition, the finished leather products have good surface gloss and good hand feeling, and have a wide range of application space

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0019] First collect the fresh leaves of Pittogonia, wash the surface with water and dry naturally, and collect the Pittogonia leaf particles by airflow crushing, and mix the Pittogonia leaf particles with 5% pentamethylene at a mass ratio of 1:10. Stir and mix the dialdehyde aqueous solution and fix the leaf particles for 20 hours; after the fixation is completed, filter and collect the leaf particles, according to the mass ratio of 1:5, stir and mix the Pittosporum flower leaf particles with n-hexane and place them in an Erlenmeyer flask, at 55 °C Heated in a water bath for 1 hour, and after the water bath heating was completed, filtered and collected the filtrate, and evaporated to dryness at 45°C to prepare a waxy concentrate of Pittosporum frondosa leaves; then, according to the mass ratio of 1:3:5, Populus euphratica The pulp board, Pittosporum leaf wax concentrate and deionized water were stirred and mixed for 10 minutes, then beaten with a beater until the slurry concen...

example 2

[0022]First collect the fresh leaves of Pittogonia, wash the surface with water and dry naturally, and collect the Pittogonia leaf particles by airflow crushing, and mix the Pittogonia leaf particles with 5% pentamethylene at a mass ratio of 1:10. Stir and mix the dialdehyde aqueous solution and fix the leaf particles for 22 hours; after the fixation is completed, filter and collect the leaf particles, according to the mass ratio of 1:5, stir and mix the Pittosporum flower leaf particles with n-hexane and place them in an Erlenmeyer flask, at 58 °C Heated in a water bath for 1.5h, and after the water bath heating was completed, filtered and collected the filtrate, and evaporated to dryness by rotary evaporation at 48°C to prepare a waxy concentrate of Pittosporum flower leaves; then, according to the mass ratio of 1:3:5, Populus euphratica The wood pulp board, Pittosporum leaf wax concentrate and deionized water were stirred and mixed for 13 minutes, then beaten with a beater u...

example 3

[0025] First collect the fresh leaves of Pittogonia, wash the surface with water and dry naturally, and collect the Pittogonia leaf particles by airflow crushing, and mix the Pittogonia leaf particles with 5% pentamethylene at a mass ratio of 1:10. Stir and mix the dialdehyde aqueous solution and fix the leaf particles for 24 hours; after the fixation is completed, filter and collect the leaf particles, according to the mass ratio of 1:5, stir and mix the Pittosporum flower leaf particles with n-hexane and place them in an Erlenmeyer flask, at 60 °C Heat in a water bath for 2 hours. After the water bath heating is completed, filter and collect the filtrate, and evaporate to dryness at 50°C to prepare a waxy concentrate of Pittosporum flower leaves; then, according to the mass ratio of 1:3:5, Populus euphratica Pulp board, Pittosporum leaf wax concentrate and deionized water were stirred and mixed for 15 minutes, then beaten with a beater until the slurry concentration was conce...

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Abstract

The invention discloses a preparation method of anti-curling and easy-to-strip release paper for leather and belongs to the technical field of preparation of release paper. According to the method, firstly, fresh leaves of pittosporum tobira are made into granules and then mixed with a glutaraldehyde water solution for fixation, the mixture and n-hexane are stirred and heated and then are evaporated to be dried, a pittosporum tobira leaf wax concentrated solution is obtained and subjected to pulping, grinding and ultrasonic dispersion treatment with populus euphratica wood-pulp boards and deionized water, modified wood pulp dispersion size is prepared and subjected to papermaking and squeezing treatment, dried modified paper is obtained, a coating liquid is prepared from polyvinyl alcohol as a main raw material, the modified paper is coated with the coating liquid, and the anti-curling and easy-to-strip release paper for leather can be obtained after the paper is dried and cooled. A preparation process is simple, the prepared release paper for leather is moderate in strength and good in release property and doesn't easily curl in the moisture environment or under the wet condition, and a prepared leather product has good surface gloss, touches well and has broad application space.

Description

technical field [0001] The invention discloses a method for preparing a release paper for anti-curling easy-peeling leather, and belongs to the technical field of release paper preparation. Background technique [0002] With the improvement of people's living standards, my country's synthetic leather industry has developed rapidly. The release paper is the paper used in the tanning industry. It is used as a carrier in the production of artificial leather, and the paste resin is coated on the release layer. After foaming process, drying, cross-linking, curing and setting, it is peeled off from the paper. , That is, plain or embossed artificial leather. [0003] Release paper is also called release paper, anti-sticking paper, silicone oil paper. It is a kind of anti-adhesive paper that prevents the prepreg from sticking and protects the prepreg from contamination. The release paper method is the most commonly used process for the production of artificial leather and synthet...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H27/00D21H17/02D21H17/04D21H17/06D21H17/33D21H21/16
CPCD21H17/02D21H17/04D21H17/06D21H17/33D21H21/16D21H27/001
Inventor 黄孟增喻政华
Owner 肇庆凯盛电子科技有限公司
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