A kind of preparation method of wax for paper packaging material

Abstract

The invention discloses a method for preparing wax for a paper packaging material. The method utilizes paraffin as a raw material and produces a desired product through sweating. Based on the ordinary sweating method, airflows pass through a wax layer and carry away a liquid component in the sweating process so that a solid component and the liquid component are forcibly separated, and preferably, the raw material wax and a water solution containing a substance decomposable into gas are emulsified so that the liquid component can be fast discharged. The method has the advantages of low equipment investment, simple production process, low operation cost, safety, energy saving and no solvent pollution. The product can be used as wax for a paper packaging material.

Description

technical field [0001] The invention belongs to the technical field of special wax production, in particular to a preparation method of wax for paper packaging materials. Background technique [0002] The use of wax to process paper packaging materials has a long history, which utilizes the lubricating, waterproof, strength, gloss and other performance properties of wax. Similar substances also have the characteristics of anti-odor, fragrance retention, and meeting FDA requirements. [0003] When wax-processed paper products are stacked or rolled together for storage, due to the effects of temperature, time, and pressure, there will be a natural sticking phenomenon between paper and paper, which is called "hardening" (commonly known as adhesion). The main factors that cause hardening of packaging paper products are the melting point, chemical composition and oil content of the selected wax. This is an important issue that should be paid special attention to when processing ...

AI Technical Summary

Problems solved by technology

[0012] Ordinary sweating separation process can produce soap wax and low melting point paraffin wax with coarse flaky crystal structure in the solid state with a melting point of 40 ℃ ~ 60 ℃, but for the ordinary sweating separation method, the solid components (higher melting point Waxes) and liquid components (oil and lower melting point waxes) are in solid and liquid phases respectively, but it is difficult to completely separate them

In order to make the oil content of the final product meet the requirements, the method of prolonging the sweating time and raising the sweating termination temperature is usually adopted, but this will lead to a long production cycle and a decrease in product yield

[0013] Compared with solvent separation, the sweating process is an intermittent operation, and the product yield is lower and the production cycle is longer, but the sweating process has the advantages of less investment, simple production process, low operating cost, safe production process, energy saving and no pollution to the environment, etc. Advantages, some manufacturers are still using this method to produce soap wax products

[0014] Over the years, the sweating method has been developed in terms of production equipment and technology, such as CN89214332 (vertical square multi-section sweating tank), CN94223980.6 (dish-type sweating device), CN98233254.8 (paraffin sweating tank), CN200920033500. X (new paraffin sweating tank), CN201210508905.0 (a high-efficiency paraffin sweating device), CN201320127680.4 (tubular paraffin deoiling device), etc., have made improvements in sweating production equipment; CN91206202 (a high-efficiency paraffin sweating tank ) has improved the sweating process, but there are still shortcomings such as long production cycle and low product yield