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A method for rapid drying of latex

A fast drying, latex technology, applied in the coating and other directions, can solve the problems of temperature increase, slow speed, large energy loss, etc., to achieve the effect of accelerating drying and improving infrared absorption efficiency

Active Publication Date: 2020-07-31
HAINAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the conversion rate of electric energy consumed by microwave drying equipment to electric field energy is about 50%, and the energy loss is too large. With the increase of drying temperature, the absorbed power of rubber increases and the temperature rises larger, making it difficult to effectively and smoothly control the drying temperature.
Although the use of infrared drying infrared wavelengths in modern industry can make its energy penetrate into the gaps between atoms and molecules, thereby accelerating the vibration of atoms and molecules, widening the distance and generating infrared thermal effects, there are few infrared-sensitive substances in latex, so it is still necessary Continuous drying at high temperature for a long time, low drying efficiency and slow speed

Method used

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  • A method for rapid drying of latex
  • A method for rapid drying of latex

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Get 100 parts of natural latex with a dry rubber mass ratio of 60%, dilute the dry rubber mass ratio of the latex to 20%, add 0.1 part of ammonium laurate, stir for 0.1h, and then add the infrared absorber magnesium aluminum hydrotalcite at a concentration of 50 % of acetic acid was dissolved for 0.1h, stirred for 0.01h, and an acetic acid solution containing infrared absorbing agent magnesium aluminum hydrotalcite was made; press 400mL / m 2 Evenly spread the acetic acid solution with a concentration of 20%, and dilute the latex by 10L / m 2 Import into the coagulation pool, and add 4 parts of the prepared coagulant solution containing the infrared absorbing agent magnesium aluminum hydrotalcite until the latex is completely solidified; after the solidified rubber is washed with water, thinned, and washed with water, it is dried with an infrared lamp. Control the drying temperature to about 100°C. from figure 1 According to the infrared drying curves of the natural rubbe...

Embodiment 2

[0027] Get 100 parts of natural latex with a dry rubber mass ratio of 76%, dilute the dry rubber mass ratio of the latex to 30%, add 1 part of sodium lauryl sulfate, stir for 0.1h, and then put the infrared absorber magnesium aluminum hydrotalcite in the Concentration is 0.01h in the hydrochloric acid of 30%, stirring 0.01h, has made the hydrochloric acid solution containing infrared absorbing agent magnesium aluminum hydrotalcite; 2 Evenly spread the hydrochloric acid solution with a concentration of 30%, and dilute the latex at 30L / m 2 Import into the coagulation pool, and add 5 parts of the prepared coagulant solution containing the infrared absorbing agent magnesium aluminum hydrotalcite until the latex is completely solidified; after the solidified rubber is washed with water, thinned, and washed with water, it is dried with an infrared lamp. Control the drying temperature to about 100°C. from figure 2 The Fourier transform infrared spectra of natural rubber containing...

Embodiment 3

[0029]Get 100 parts of styrene-butadiene latex with a dry glue mass ratio of 60%, dilute the dry glue mass ratio of the latex to 20%, add 0.1 part of potassium hydroxide, stir for 0.1h, then add the infrared absorber magnesium aluminum hydrotalcite at a concentration of Dissolve in 50% acetic acid for 0.1h, stir for 0.01h, and make an acetic acid solution containing infrared absorbent magnesium aluminum hydrotalcite; press 300mL / m at the bottom of the solidification tank 2 Spread the 50% acetic acid solution evenly, and dilute the latex by 10L / m 2 Import into the coagulation pool, and add 4 parts of the prepared coagulant solution containing the infrared absorbing agent magnesium aluminum hydrotalcite until the latex is completely solidified; after the solidified rubber is washed with water, thinned, and washed with water, it is dried with an infrared lamp. Control the drying temperature to 105°C.

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Abstract

The invention relates to a method for fast drying latex. 100 parts of latex with the mass ratio of dry glue being 3%-80% is taken, if the dry glue mass ratio of the latex is larger than 30%, the dry glue mass ratio of the latex is reduced to 20% to 30% through dilution, 0.01-1.5 parts of surface active agent is added, and stirring is carried out for 0.01 h to 0.1 h; then infrared absorbent magnalium hydrotalcite is dissolved in a latex coagulator solution, stirring is carried out for 0.01 h to 0.1 h, and a latex coagulator solution containing infrared absorbent magnalium hydrotalcite is prepared; the coagulator solution is evenly laid at the bottom of a solidification pool according to 100-500 mL / m<2>, diluted latex is guided into the solidification pool according to 5-20 L / m<2>, and 2-10 parts of the prepared latex coagulator solution containing infrared absorbent magnalium hydrotalcite is added till the latex is completely solidified; and the solidified glue material is washed, pressed to be thin, washed and dried with an infrared generator. The method has beneficial effects that the infrared absorption rate of a latex system can be increased under irradiation of infrared rays generated by the infrared generator, and therefore the aim of accelerating drying is achieved, and the infrared absorbent can be used for fast drying of the latex.

Description

technical field [0001] The invention belongs to the field of polymer material science, in particular to a method for quickly drying latex. Background technique [0002] Latex is a relatively stable colloidal dispersion system formed by high polymer particles dispersed in water medium, containing 52%-75% water by mass fraction. The process of manufacturing products from latex is: latex, compounding, molding, drying, and vulcanization. Latex can produce many products that dry glue cannot or is difficult to produce. It is mainly used in five categories of products, such as dipped products, latex rubber filaments, latex sponges, carpet backs, and adhesives. However, the latex itself contains a lot of water, and the semi-finished product after molding still contains a large amount of water. Because the water is not easy to remove, it affects the application of latex in the production of thick-walled products, and the variability of natural latex is large, so it is difficult to c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C37/00C08C1/00
Inventor 于人同廖建和汪国庆李军辉王申鸣王云鹏王一卓赵灵珠廖双泉李志君
Owner HAINAN UNIV