Abstract : The adhesion of the ink layer of the soft plastic packaging using the surface printing process on the surface of the packaging bag is an important factor related to whether the printing writing and the pattern are easy to fall off. By detecting binding to a fastness frozen surface ink film packaging, testing methodology for verifying the printing quality of the packaging, and testing process, Labthink blue light BLJ-02 disc peel test machine and YGJ-02 gel The test equipment such as the adhesive tape press machine is briefly described, which provides a reference for the printing effect of the enterprise inspection package.
Key words : surface printing, soft plastic packaging, ink layer bonding fastness, disc peeling test machine, adhesive tape press machine, single layer film, ink layer peeling off
1 , meaning
Common soft plastic bags include single-layer film and composite film. The printing methods include printing and printing. For single-layer film-like flexible plastic packaging, the quality of printing is particularly important because the printed layer of a single-layer film is usually exposed to the outside, which is greatly affected by the external environment, if the printing ink is combined on the surface of the film. If the fastness is poor, the ink layer may be easily worn or peeled off during the transportation and sales process of the finished package, which may not only reduce the image of the packaged product in the mind of the consumer, but may also Loss of important information such as production date, shelf life, and preservation methods is inconvenient for the purchase or use of the consumer. Therefore, improving the bonding fastness of the printing ink on the surface of the packaging, and strengthening the detection of the bonding fastness of the printing layer on the surface of the coating material on the surface of the film is an important measure for preventing the ink layer from being worn and falling off.
Figure 1 Common surface printed soft plastic packaging
2 , testing basis
The ink layer bonding fastness test can refer to the relevant provisions in Article 5.7 of GB/T 7707-2008 "Gravure Decoration Prints" .
3 , test samples
A single-layer soft plastic packaging bag for quick frozen food packaging.
4 , testing equipment
In this paper, the BLJ-02 disc peeling tester and the YGJ-02 adhesive belt presser independently developed by Jinan Languang Electromechanical Technology Co., Ltd. were used to test the ink layer bonding fastness of the sample.
Figure 2 BLJ-02 disc peeling test machine
Figure 3 YGJ-02 adhesive belt press machine
4.1 Test principle
The basic principle of this test is to stick the adhesive tape that meets the requirements on the ink printing surface of the sample, and roll the adhesive tape and the sample stuck together with the standard load, the number of rolling times and the rolling speed, and place a section. After the time, the sample and the adhesive tape were peeled off under a certain pressure to check the peeling of the ink layer on the surface of the sample, thereby analyzing the bonding fastness of the printed layer of the sample.
4.2 Scope of application
(1) The testing equipment involved in this paper can be used for the test of the bonding strength of the ink layer of plastic film printed matter, cellophane printed matter, etc., and can also be used for the aluminum plating of vacuum aluminum plating film, coating film and the like. Test of the adhesion state of the coating layer.
(2) The testing equipment involved in this paper complies with GB/T 7707 , JIS C2107 , JIS Z0237 and many other national and international standards.
4.3 Equipment parameters
(1) BLJ-02 disc peeling test machine
- The inter-disc pressure was 100 N and the peeling speed was 0.8 m/s .
- The peeling angle and speed are designed in strict accordance with national standards, effectively ensuring the reliability and versatility of the test data.
- The test ends with an automatic alarm prompt to ensure the user's operation safety.
- The system is controlled by a microcomputer, with a PVC operation panel and a liquid crystal display, which is convenient for users to perform test operations and data display quickly and conveniently.
(2) YGJ-02 Adhesive Tape Press Machine
- The rolling speed is 300 mm/min , the load of the press roller is 20 N ± 0.5 N , and the number of rolling times is 3 times.
- The quality of the pressure roller, the thickness of the attached rubber, and the hardness are designed in strict accordance with national standards, effectively ensuring the accuracy and versatility of the test data.
5 , the test process
(1) Paste the adhesive tape on the printed surface of the sample to be tested.
(2) The above sample was placed on a belt press roll and rolled back and forth three times for 10 minutes .
(3) One end of the sample is clamped on the A disk ( the disk with a larger diameter ) , and the tape of the outcrop is fixed on the B disk.
(4) Start the disc peel tester, and the A disc uncovers the tape at a speed of 0.8 m/s .
(5) Remove the sample, cover the tested portion of the sample with a translucent milligram paper, and count the number A 1 of the ink layer and the number A 2 of the ink layer at the detachment .
(6) Calculate the ink layer bonding fastness [A 1 /(A 1 +A 2 )] .
6 , test results
The ink layer of the sample appeared to fall off, and the ink layer bonding fastness tested was 96% .
7 , conclusion
The ink layer bonding fastness is a physical index for characterizing whether the ink layer is easy to fall off, and is an important performance index for evaluating the printing quality of printed products. Combined use of Labthink BLJ-02 disc peel test machine YGJ-02 and the tape pressure roller machine, print ink can be detected in good fastness, and the test process is simple, accurate test results, and reliable. Labthink is committed to providing professional packaging inspection equipment and testing services to customers around the world. The packaging properties include barrier properties, flexibility, impact resistance, puncture resistance, heat sealing performance, sealing performance, solvent residue, and evaporation. Residues, related equipment information and service content can be viewed at Jinan Languang Company or directly by telephone . The more you understand, the more you trust! Jinan Languang Electromechanical Technology Co., Ltd. is willing to enhance technical exchanges and cooperation with enterprises and institutions in the industry.
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