Liquid milk black and white film packaging ink layer bonding fastness detection program - Database & Sql Blog Articles

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Abstract: The degradation of the ink layer on liquid milk packaging can significantly impact product appearance and consumer confidence in quality. Testing the adhesion of printed ink layers is crucial to prevent peeling caused by friction during transport. This study evaluates the bonding strength of ink layers on black and white film packaging using Labthink BLJ-02 disc peeling and YGJ-02 adhesive tape press machines. Detailed procedures, equipment parameters, and testing principles are provided to help companies improve their packaging material inspection processes.

Keywords: Liquid milk, black and white film, surface printing, ink layer shedding, ink adhesion fastness, disc peeling tester, adhesive tape press machine

1. Introduction

Most liquid milk packaging uses surface printing technology to display essential information like production date, shelf life, and storage instructions. The adhesion of the ink layer is a key factor in determining the quality of the printed surface. Since the ink is exposed to external elements, poor adhesion can lead to damage or detachment during transportation, storage, and use. This not only affects product aesthetics but also makes it difficult for consumers to access important details, potentially impacting purchasing decisions. Therefore, ensuring strong ink adhesion is vital for maintaining product quality and customer satisfaction. Companies should focus on testing ink adhesion to avoid such issues.

Figure 1: Liquid milk black and white film packaging

2. Testing Standards

The adhesion test follows the guidelines outlined in section 5.7 of GB/T 7707-2008, which specifies the requirements for gravure-printed materials.

3. Sample Preparation

A sample of black and white film packaging was obtained from a dairy company for testing purposes.

4. Testing Equipment

The BLJ-02 disc peeling tester and YGJ-02 adhesive tape presser, both developed by Jinan Languang Electromechanical Technology Co., Ltd., were used to evaluate the ink layer's adhesion strength.

Figure 2: BLJ-02 disc peeling test machine

Figure 3: YGJ-02 adhesive tape press machine

4.1 Test Principle

Adhesive tapes that meet specified standards are applied to the printed surface of the sample. After rolling under controlled pressure and speed, the tape is peeled off to assess whether the ink layer has been damaged. This process helps determine the adhesion strength of the ink layer.

4.2 Application Scope

This equipment is suitable for testing not only the adhesion of ink layers on plastic films and cellophane but also for evaluating the adhesion of coatings on vacuum metallized films and coated films. It complies with multiple international and national standards, including GB/T 7707, JIS C2107, and JIS Z0237.

4.3 Equipment Specifications

(1) BLJ-02 Disc Peeling Tester

• Pressure between discs: 100 N
• Peeling speed: 0.8 m/s
• Designed according to national standards for accurate and reliable results
• Automatic alarm system for user safety
• Microcomputer-controlled with a clear LCD interface for easy operation

(2) YGJ-02 Adhesive Tape Press Machine

• Rolling speed: 300 mm/min
• Press roller load: 20 N ± 0.5 N
• Number of rolling cycles: 3 times
• High-quality pressure roller with standard rubber thickness and hardness for precise testing

5. Testing Procedure

1. Apply an adhesive tape to the printed surface of the sample.
2. Start the disc peeling tester and peel the tape at a speed of 0.8 m/s.
3. Remove the sample, cover the tested area with translucent paper, and count the number of ink layer fragments (A₁) and intact areas (A₂).
4. Calculate the ink adhesion fastness using the formula: A₁ / (A₁ + A₂).

6. Test Results

The ink layer on the sample was partially removed, resulting in an adhesion fastness of 95%.

7. Conclusion

The Labthink BLJ-02 disc peeling tester and YGJ-02 adhesive tape press machine are highly effective tools for assessing ink adhesion. They provide accurate and reliable results, making them ideal for evaluating the performance of printed packaging materials. These devices help ensure that the ink layer remains firmly attached, preserving the visual appeal and functional integrity of the packaging. Labthink continues to offer advanced testing solutions to support global customers in addressing packaging challenges. For more information, visit www.labthink.com. Learn more, trust more. Jinan Languang Electromechanical Technology Co., Ltd. is committed to fostering collaboration within the industry to drive innovation and quality improvement.