Abstract: The shedding of liquid ink in the packaging and printing of liquid milk will seriously affect the product image and even affect the consumer's trust in product quality. The combined ink fastness test of the package can effectively prevent the phenomenon that the printing ink layer falls off due to friction during the transportation of the product. Of Labthink herein by BLJ-02 disc peel test machine YGJ-02 and the tape pressure roller and other test equipment binding assay fastness of the surface of liquid milk monochrome ink film packaging, and detailed test procedures and test principle , Equipment parameters and other contents provide reference for the company's inspection of packaging materials. Keywords: liquid milk, black-and-white film, surface printing, ink drop, ink layer adhesion, disc peel tester, adhesive tape press roller 1 , the meaning Liquid milk black and white film packaging mostly uses the surface printing process, that is, printing the production date, shelf life, preservation method and other important information on the surface of the product packaging. Ink adhesion is a key indicator of the printing performance of the surface printing process, because the printing layer is usually exposed to the outside world, affected by the external environment, if the printing ink on the film surface of the joint fastness is poor, then In the process of transportation, storage, sale and use of the product packaging, the ink layer is easily worn or detached when rubbed or rubbed by external force, which not only reduces the image of the packaged product in the minds of consumers, but also leads to the importance of the product. The lack of information inconveniences the purchase or use of consumers. Therefore, in order to improve the combined fastness of printing ink on the packaging surface and prevent the ink layer from grinding and falling off, companies should strengthen the detection of the binding fastness of the packaging ink layer. 2. Test basis For the test of ink layer fastness, refer to the relevant provisions in 5.7 of the standard GB/T 7707-2008 " Intaglio Decorative Prints" . 3 , test sample Liquid milk black and white film provided by a dairy plant. 4 , testing equipment In this paper, the BLJ-02 disc peel tester and YGJ-02 adhesive tape press roller independently developed by Jinan Languang Electromechanical Technology Co., Ltd. were used to test the ink layer fastness of the samples. 4.1 Test principle The adhesive tape that meets the requirements is attached to the ink printing surface of the sample, and the adhesive tape and the sample that are pasted together are rolled with the standard load, the number of rolling times and the rolling speed. The sample and adhesive tape were peeled off under pressure, and the peeling of the ink layer on the surface of the sample was observed to analyze the binding fastness of the sample print layer. 4.2 Scope of application (1) The testing equipment mentioned in this paper can be used for the testing of the ink layer binding fastness of plastic film prints, cellophane prints, etc., and can also be used for aluminized layers of materials such as vacuum aluminized films and coated films. Coating layer adhesion state test. (2) The testing equipment involved in this article conforms to many national and international standards such as GB/T 7707 , JIS C2107 , JIS Z0237 and so on. 4.3 Equipment Parameters (1) BLJ-02 Disc Peel Tester (2) YGJ-02 Adhesive Roller 5 , the test process (1) Stick the adhesive tape on the printed surface of the sample to be tested. (2) Place the above sample on a tape roll machine and roll it back and forth three times and let it stand for 10 minutes . (3) One end of the specimen is clamped on the A plate ( large diameter plate ) , and the out tape is fixed on the B plate. (4) Start the disc peel tester, A disc is opened at a speed of 0.8 m/s . (5) Remove the sample, cover the tested part of the sample with semi-transparent millimeter paper, and count the number of cells A1 occupied by the ink layer and the number of cells A2 occupied by the ink layer at the drop-off . (6) Calculate the ink layer binding fastness [A1/(A1+A2)] . 6 , test results The ink layer on the surface of the sample tested here was peeled off, and the ink layer had a combined fastness of 95% . 7. Conclusion Of Labthink BLJ-02 disc peel test machine and ink YGJ-02 tape pressing roll mill, for detecting a professional print fastness, and the testing process is simple, accurate test results, reliable, a true reflection of black and white film Packaging ink layer combined with fastness index value. Labthink has always been committed to providing professional packaging testing equipment and testing services to customers around the world. It has solved tens of thousands of customers with various kinds of incurable diseases on packaging. For more information about related equipment and services, you can visit Jinan. Languang company website to view or call Jinan Languang consulting. The more you understand, the more trust! Jinan Languang Electromechanical Technology Co., Ltd. is willing to take this opportunity to increase technical exchanges and cooperation with enterprises and institutions in the industry.
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