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Method for quickly detecting light resistance of titanium dioxide for papermaking

A detection method and technology of titanium dioxide, applied in the direction of weather resistance/light resistance/corrosion resistance, measuring devices, instruments, etc., can solve the problems of long detection cycle, product lag, and high detection cost, and achieve reduced detection cost, short detection cycle, Guaranteed effect of accuracy

Inactive Publication Date: 2015-08-19
LOMON BILLIONS GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because this detection method needs to make the titanium dioxide sample into a paper sample first, the detection cost is high and the detection cycle is long, which greatly increases the operation cycle of papermaking and the problematic products are relatively lagging behind, which is not conducive to the long-term operation of the paper mill.
Moreover, the difference in the paper sample preparation process may lead to uneven distribution of titanium dioxide in the sample, which will affect the accuracy of the test results.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1. Mix 30g of titanium dioxide, 30g of melamine resin, and 30g of water with a high-speed mixer to obtain a mixed slurry;

[0019] 2. Take the obtained mixed slurry, 30g as a group, and use a 150μm wet film maker to prepare membranes on three glass plates;

[0020] 3. Put the prepared membrane in an oven at 60° for 30 minutes;

[0021] 4. Test the CIEL*a*b* initial values ​​of the three diaphragms with a color difference meter;

[0022] 5. Put the three diaphragms at a temperature of 50°C and a strength of 0.76W / m 2 Irradiate in the ultraviolet aging box for 3 hours, and test the CIEL*a*b* value of the three diaphragms with a color difference meter;

[0023] 6. Calculate the CIEL*a*b* values ​​before and after the three films are irradiated, and the parallel sample △E, that is, the light resistance test data of titanium dioxide is: 0.70, 0.74, 0.72, the difference between the parallel test results is ≤0.10, and the parallel sample The average value of t...

Embodiment 2

[0025] 1. Mix 40g of titanium dioxide, 40g of melamine formaldehyde resin, and 20g of water with a high-speed mixer to obtain a mixed slurry;

[0026] 2. Take the obtained mixed slurry, 33.3g as a group, and use a 250μm wet film maker to prepare membranes on three glass plates;

[0027] 3. Dry the film naturally;

[0028] 4. Test the CIEL*a*b* values ​​of the three diaphragms with a color difference meter;

[0029] 5. Put the three diaphragms at a temperature of 50°C and a strength of 0.83W / m 2 Irradiate in the ultraviolet aging box for 4 hours, and test the CIEL*a*b* value of the three diaphragms with a color difference meter;

[0030] 6. Calculate the CIEL*a*b* values ​​before and after the three films are irradiated, and the parallel sample △E, that is, the light resistance test data of titanium dioxide is: 0.74, 0.74, 0.72, the difference between the parallel test results is ≤0.10, and the parallel sample The average value of the test results is 0.73, and...

Embodiment 3

[0032] 1. Mix 40g of titanium dioxide, 30g of methanol etherified melamine formaldehyde resin, and 30g of water with a high-speed mixer to obtain a mixed slurry;

[0033] 2. Take the obtained mixed slurry, 33.3g as a group, and use a 250μm wet film maker to prepare membranes on three glass plates;

[0034] 3. Put the prepared film in an oven at 60° for 30 minutes;

[0035] 4. Test the CIEL*a*b* values ​​of the three diaphragms with a color difference meter;

[0036] 5. Put the three diaphragms at a temperature of 50°C and a strength of 0.80W / m 2 Irradiate in the ultraviolet aging box for 4 hours, and test the CIEL*a*b* value of the three diaphragms with a color difference meter;

[0037] 6. Calculate the CIEL*a*b* values ​​before and after the three films are irradiated, and the parallel sample △E, that is, the light resistance test data of titanium dioxide is: 0.75, 0.74, 0.72, the difference between the parallel test results is ≤0.10, and the parallel sample The...

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Abstract

The invention discloses a method for quickly detecting the light resistance of titanium dioxide for papermaking. The method comprises the following steps: uniformly dispersing titanium dioxide and resin into water to obtain mixed slurry after uniform stirring, coating a transparent glass plate with the mixed slurry through a wet film preparation device, drying in a drying box with the temperature of 60 DEG C for 30min or naturally airing to prepare a film, and testing and irradiating by a color difference meter to obtain a CIEL*a*b* initial value of the front film; putting the film into an ultraviolet aging box for irradiation, and testing and irradiating by the color difference meter to obtain a CIEL*a*b* initial value of the rear film; calculating color difference change deltaE according to the irradiated front and rear CIEL*a*b*, wherein the color difference change deltaE is the light resistance of titanium dioxide. According to the method for detecting the light resistance of the titanium dioxide, the detection period can be effectively shortened, and the detection result is accurate and reliable.

Description

technical field [0001] The invention relates to the field of performance detection methods of titanium dioxide, in particular to a rapid detection method for the light resistance of titanium dioxide for papermaking. Background technique [0002] Titanium dioxide is a very important white pigment, which is widely used in coatings, plastics, paper, ink and other industries. Papermaking is the third largest user of titanium dioxide. [0003] In the field of papermaking, titanium dioxide is used as the main raw material for the production of decorative base paper, and its index has a decisive impact on the quality of the product. Because there are many photoactive points on the surface of titanium dioxide, under the irradiation of ultraviolet light, the oxygen ions on the lattice can lose electrons and transform into oxidative oxygen atoms. If these oxygen atoms enter the resin system of the decorative paper, they can be The resin molecules are broken and degraded, resulting i...

Claims

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Application Information

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IPC IPC(8): G01N17/00
Inventor 陈建立张新波王永珊石强强苏光明周文静
Owner LOMON BILLIONS GRP CO LTD
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