CN102735629B - Method for detecting stability of inkjet printing ink for ceramic decoration - Google Patents

Abstract

The invention discloses a method for detecting ink-jet printing ink for ceramic decoration, which comprises the following steps: taking the ceramic ink to be tested and placing it in a centrifuge test tube, and centrifuging it with a centrifuge for a certain period of time; putting the centrifuged ceramic ink into a beaker , stir with a stirrer for a certain period of time; take out the stirred sample, draw the sample with a micro-sampler near the liquid surface, dilute it by a certain number of times, and measure the absorbance A _o of the dispersion at the maximum absorption wavelength; Place the ceramic ink in a centrifuge test tube and centrifuge for a certain period of time with a centrifuge; take out the dispersion after centrifugation in step 4, and use a micro-sampler to draw the same volume according to the sampling method in step 3 at the same liquid level Dilute the sample by the same multiple, and measure the absorbance A _i of the dispersion at the maximum absorption wavelength under the same conditions as in Step 3. Calculate the specific absorbance of A _i /A _o , the higher the value, the more stable the performance of the ink.

Description

Testing method for the stability of inkjet printing inks for ceramic decoration

technical field

The invention relates to the technical field of detection of ink-jet printing ink for ceramic decoration, in particular to a detection method for the stability of ink-jet printing ink for ceramic decoration.

Background technique

Inkjet printing ink technology for ceramic decoration is a decoration method in which colorants are made into multi-color inks, which are directly printed on the surface of ceramics by inkjet printing, and colored after firing. Compared with the existing ceramic decoration methods, inkjet printing technology has the following advantages: first, the product is realistic and delicate, and can obtain richer texture changes than conventional ceramic tiles; second, it can realize personalized design and manufacture. High degree of mechanization and automation, inkjet printing can be manufactured only by inputting design patterns on the computer, which is conducive to the production of small batches of ceramic products with various patterns; third, inkjet printing does not need to contact the green body, which can reduce damage Fourth, the printing on the three-dimensional surface of ceramic tiles, especially the vivid printing of textures on various concave-convex floating bricks and beveled surfaces.

Inkjet printing inks for ceramic decoration need to have good dispersion stability so as not to block the nozzles during printing. Inkjet printing ink for ceramic decoration is a dispersion system obtained by dispersing ceramic toner in a carrier liquid, and this system is relatively stable. The stability of the dispersion needs to be considered for a certain period of time without sedimentation, aggregation, or flocculation.

The test for the stability of ceramic ink usually adopts the method of putting the ink into a graduated test tube, standing it for 60 days, and observing the sedimentation volume. The advantage of this method is that it is simple, but the disadvantage is that the detection time is long, and the detection environment cannot simulate the real environment (temperature, shear rate, etc.) of the ink in the ink system of the inkjet printing device.

Contents of the invention

The technical problem to be solved by the present invention is to provide a fast and small error detection method for the stability of inkjet printing ink for ceramic decoration.

The technical solution adopted for solving the above-mentioned technical problems:

A detection method of inkjet printing ink for ceramic decoration, characterized in that it comprises the following steps:

1. Take a certain volume of ceramic ink to be tested, put it in a centrifuge test tube, and use a centrifuge to centrifuge at a certain speed for a certain period of time;

2. Put the ceramic ink that has been centrifuged in step 1 into a beaker, and use a stirrer to stir for a certain period of time according to a certain stirring speed;

3. Take out the sample after the stirring treatment in step 2, draw a certain volume of sample with a micro-sampler near the liquid surface, dilute it by a certain number of times, and measure the absorbance A _o of the dispersion at its maximum absorption wavelength;

4. Place the ceramic ink after the stirring process in step 2 in a centrifuge test tube, and use a centrifuge to centrifuge for a certain period of time under the condition of a specific number of revolutions;

5. Take out the dispersion liquid after centrifugation in step 4, according to the sampling method in step 3, at the same liquid level, use a micro-sampler to draw the same volume of sample, dilute the same multiple, and use the same conditions as step 3 , measure the absorbance A _i of the dispersion at its maximum absorption wavelength.

6. Calculate the specific absorbance of A _i /A _o , the higher the value, the more stable the performance of the ink.

The beneficial effects brought by the adoption of the present invention: the present invention simulates the vibration of the ceramic ink during transportation and the circulation of the ceramic ink in the inkjet printing equipment through the agitator stirring, and reduces the error of the ink test; To simulate the static sedimentation of the ink, it can accelerate the sedimentation process of the ceramic ink; by testing the specific absorbance to determine the ink sedimentation rate, the stability of the ceramic ink can be quantitatively analyzed. Compared with the traditional method, the invention can quantitatively analyze the stability of the ceramic ink, shortens the detection time, has small operation errors, and is more favorable for application.

Detailed ways

The present invention will be further elaborated below through specific implementation examples. It should be understood that the following descriptions are only for explaining the present invention and not limiting its content.

Implementation example

Step 1 Take 100ml of ceramic ink to be tested, put it in a centrifuge tube, and use a centrifuge to centrifuge at a speed of 1000r/min for 10min;

Step 2 Put the ceramic ink that has been centrifuged in Step 1 into a beaker, and use a JB-3 magnetic stirrer (Shanghai Leici Xinjing Instrument Co., Ltd.) to stir at 40°C for 10 minutes at a stirring speed of 300rpm;

Step 3 Take out the sample after the magnetic stirring treatment in step 2, draw 0.5mL with a micro-sampler at a distance of 1cm below the liquid surface, dilute 100 times, and measure the absorbance A _o of the dispersion at the maximum absorption wavelength;

Step 4 Place the ceramic ink processed by magnetic stirring in step 2 into a centrifuge test tube, and centrifuge for 10 min at a speed of 1000 r/min with a centrifuge;

Step 5: Take out the dispersion after the centrifugation treatment in Step 4, draw 0.5 mL with a micro-sampler at a distance of 1 cm below the liquid surface of the centrifuge tube, dilute 100 times, and measure the absorbance A _i at the maximum absorption wavelength;

Step 6 Calculate the specific absorbance Ri according to formula ①, so as to determine the sedimentation rate of the ink, and quantitatively analyze the stability of the ceramic ink. The higher the value, the more stable the performance of the ink.

$R_i=\frac{A_i}{A_o}\×100\%$ ……… ①

It can be seen from the above method that the present invention has small operating errors, shortens the detection time, and is more conducive to application.

Claims (1)

1. a detection method for ceramic decoration inkjet printing ink stability, is characterized in that comprising the following steps: 1. Take 100ml of ceramic ink to be tested, put it in a centrifuge tube, and use a centrifuge to centrifuge for 10min at a speed of 1000r/min; 2. Put the ceramic ink that has been centrifuged in step 1 into a beaker, and stir it with a stirrer at 40°C for 10 minutes, and the stirring speed is 300rpm; 3. Take out the sample after the stirring treatment in step 2, draw 0.5mL sample with a micro-sampler at a distance of 1cm below the liquid surface, dilute it 100 times, and measure the absorbance A _o of the dispersion at the maximum absorption wavelength; 4. Place the ceramic ink after the stirring process in step 2 in a centrifuge test tube, and use a centrifuge to centrifuge for 10 minutes at a speed of 1000r/min; 5. Take out the dispersion that has been centrifuged in step 4. According to the sampling method in step 3, draw 0.5mL sample with a micro-sampler at a distance of 1cm below the liquid surface, dilute 100 times, and use the same conditions as step 3. , measure the absorbance A _i of the dispersion at its maximum absorption wavelength; 6. Calculate the specific absorbance of A _i /A _o according to formula ①, so as to determine the sedimentation rate of the ink, and quantitatively analyze the stability of the ceramic ink. The higher the value, the more stable the performance of the ink ……… ①.