Monitoring method for the composite fastness between the aluminum-plastic composite film of jam-华华电子网

Photocoupler

Abstract: Peel strength is a physical and mechanical property that reflects the composite fastness of composite membrane materials, and is an important performance index of composite membrane materials. This paper takes Labthink Languang XLW (EC) intelligent electronic tensile testing machine to test the peeling strength of jam aluminum-plastic composite film as an example. It introduces the monitoring method, test principle and equipment parameters for detecting the composite fastness of soft plastic packaging. Provide a reference for monitoring the peel strength of the package and selecting the appropriate testing equipment.
Key words: jam, aluminum-plastic composite film, composite fastness, peel strength, interlayer peeling delamination, intelligent electronic tensile testing machine
1. Meaning Jam is a sauce made by mixing fruits and sugars to keep fruits preserved for a long time. In order to extend the shelf life of the jam, most of them are packaged in glass cans or aluminum-plastic composite film, which not only preserves the taste of the product, but also ensures that the sugar and nutrients in the product are not easily oxidized and deteriorated.
Compared with ordinary plastic composite film, the jam-aluminum-plastic composite film contains metal materials such as aluminum foil, so the aluminum-plastic composite film has greater barrier properties and physical and mechanical properties than ordinary composite films or single-layer films. improve. If the peeling strength of the composite film material is low, peeling and delamination between the individual film layers tends to occur after packaging the contents, which not only reduces physical and mechanical properties such as barrier properties and impact resistance of the packaging material, but also tends to increase the product. Case. Therefore, it is of great significance to strengthen the monitoring of the composite fastness of composite membrane materials.

Figure

1 Jam aluminum-plastic composite film packaging

2, test standards

The method standard for testing the peeling strength of the composite film of soft plastic packaging is GB 8808-1988 "Test method for peeling of soft composite plastic materials".

3. Test samples A jam-aluminum-plastic composite bag provided by a food company.
4. Testing equipment This paper uses the XLW (EC) intelligent electronic tensile testing machine independently developed by Jinan Languang Electromechanical Technology Co., Ltd. to test the peel strength of aluminum-plastic composite film samples.

Figure 2 XLW (EC) intelligent electronic tensile testing machine

4.1 Test principle The fixture of the equipment is divided into upper and lower parts. The upper clamp can move according to the preset speed, and the lower clamp remains fixed. During the test, the two ends of the sample are clamped in the upper and lower clamps respectively. As the upper clamp moves, the specimen undergoes tensile, peeling or tearing, and the force and displacement changes caused by the change of the sample. The force value sensor and the displacement sensor respectively placed on the moving chuck are respectively monitored, and according to the monitoring result, the peeling strength, the breaking force, the deformation rate and the like of the sample are calculated.
4.2 Scope of application (1) This equipment is specialized in plastic film, composite materials, flexible packaging materials, plastic hoses, adhesives, adhesive tapes, stickers, medical patches, release papers, protective films, combinations. Peeling, stretching, deformation, tearing, heat sealing, bonding, puncture force, opening force, low speed unwinding force, peeling off of cover, metal foil, separator, back sheet material, non-woven fabric, rubber, paper, etc. Tests such as force, such as tearing force of oral liquid cap, puncture/pull force, puncture force of infusion bag cover, puncture/pull force of soft rubber bottle stopper.
(2) This equipment meets many national and international standards, such as GB 8808, GB/T 1040.1 ~ GB/T1040.5, GB/T 4850, GB/T 12914, YBB00132002, ISO 37, ASTM E4, ASTM D882, JIS P8113, QB/T 2358, QB/T 1130, etc.
4.3 Equipment Parameters  The test specifications of the equipment are 50 N and 500 N. Customers can choose according to the needs of the test.
 The test accuracy of the device is better than 0.5, which ensures the accuracy of the test data.
 The equipment supports the two-way test mode of tension and compression. There are seven test speeds for the user in the pull and press directions, which are 50 mm/min, 100 mm/min, 150 mm/min, 200 mm/min, 250 mm/min, 300 mm/min, 500 mm/min.
 This equipment integrates eight independent test procedures such as peeling, stretching, tearing and heat sealing, providing users with a choice of various test items.
 This equipment adopts the pneumatic sample clamping mode to prevent the sample from slipping and ensure the accuracy of the test data.
 Intelligent configuration such as limit protection, overload protection and automatic return to ensure the user's operation safety.
 Support LystemTM laboratory data sharing system to achieve unified management of test data.
5. Test procedure (1) Five specimens each having a width of 15 mm and a length of 200 mm were cut along the transverse and longitudinal directions of the sample.
(2) Each strip is manually stripped 50 mm in advance.
(3) The two ends of the stripped portion of the sample are respectively clamped in the upper and lower jigs of the device, and the longitudinal axis of the stripping portion of the sample coincides with the center line of the upper and lower jigs.
(4) Set the parameter information such as test speed and sample width, click the test option, and the test starts.
(5) The equipment automatically detects the change in the force value during the test, and calculates and displays the final peel strength value of the sample based on the detected data.
6. Test results The transverse peel strengths of the jam-aluminum-plastic composite film samples tested in this paper were 2.15 N/15 mm, 1.97 N/15 mm, 2.07 N/15 mm, 1.81 N/15 mm, and 1.86 N/15 mm, respectively. The longitudinal peel strengths were respectively 1.85 N/15mm, 1.93 N/15mm, 2.14 N/15mm, 2.21 N/15mm, 1.98 N/15mm.
7. Conclusion XLW (EC) intelligent electronic tensile testing machine is a professional testing equipment for detecting the peeling strength of composite film. It has the advantages of simple test operation, high intelligence, accurate test results and high test accuracy. From the above test results, the peeling strength of the composite layer of the jam-aluminum-plastic composite film is low, which is the main reason for the peeling and delamination between the packaging layers. Therefore, the company should strengthen the monitoring of the peel strength of the package, and should focus on it. Packaging properties such as barrier properties, heat seal strength, and sealing properties. Labthink is committed to providing professional testing equipment and services to customers all over the world. The testing equipment for research and development covers almost all aspects of soft plastic packaging. For the relevant testing equipment information, you can log on to Jinan Languang website www. View or consult at .labthink.com. Labthink is looking forward to enhancing technical exchanges and cooperation with enterprises and institutions in the industry!