Abstract: Mooncake is a traditional dish of the Chinese nation and a must-have for the Mid-Autumn Festival. The sealing strength of the mooncake packaging heat seal is directly related to the sealing performance and bag breaking rate of the package, and affects the quality of the mooncake during the circulation process. In this paper, Labthink XLW (M) intelligent electronic tensile testing machine moon cake packaging sealing strength during heat sealing for example, describes the principle of the test, and the basic parameters of the test equipment, such as a step for the packaging companies detect heat seal sealing effect Provide an effective and effective verification method.
Key words: heat seal, sealing port, heat seal strength, seal strength, heat seal strength, soft plastic packaging, intelligent electronic tensile testing machine, moon cake, pastry, air leak, bag
1 , meaning
The sealing strength of the package heat sealing is also called the heat sealing strength. The strength of the sealing is mainly related to the heat sealing parameters of the heat sealing machine and the heat sealing layer material of the packaging bag.
Moon cake is a long-established traditional Han Chinese snack. It is a must-eat for the Mid-Autumn Festival. It symbolizes reunion and harmony. There are many types of moon cakes and different flavors. Among them, Cantonese style, Beijing style, Soviet style, and tidal style moon cakes are popular among people from all over the North and South. Moon cakes often contain more oil and fat components, which are sensitive to oxygen. They require good sealing and barrier properties. The sealing of mooncake packaging is mainly related to the sealing strength of heat seals. In addition, the sealing strength of the package is poor, and it may cause problems such as air leakage, bagging, and bag breaking at the sealing of the mooncake package.
2 , the status quo
At present, the packaging materials of mooncakes on the market are mainly plastic composite membranes. The mooncakes are often protected by a tray structure, and a deoxidizer is built in to reduce the oxygen content in the package.
Figure 1 moon cake common packaging form
The testing standards for the sealing strength of the heat-sealing sealing of soft plastic packaging are mainly referred to QB/T 2358-98 "Test method for heat sealing strength of plastic film packaging bags".
3 , test samples
A brand of moon cake plastic composite film packaging bags.
4 , testing equipment
This test uses the XLW (M) intelligent electronic tensile testing machine independently developed by Jinan Languang Electromechanical Technology Co., Ltd. to test the sealing strength of the sample.
Figure 2 XLW (M) intelligent electronic tensile testing machine
4.1 Equipment Principle
The device is divided into two upper and lower chucks, the upper chuck is a movable chuck, which can move according to the set speed. The upper chuck is equipped with a force value sensor and a displacement sensor, and the lower chuck remains stationary during the test. Do not move. During the test, the two ends of the sample are clamped on the upper and lower chucks respectively, and the two chucks are moved relative to each other, so that the sample is displaced and the force value is changed, and recorded by the force sensor and the displacement sensor in real time. After processing and calculation, the sealing strength, tensile, tearing, deformation rate and other performance indexes of the sample are obtained.
4.2 Scope of application
(1) This equipment is suitable for the sealing performance (heat seal strength) performance, tensile strength and deformation rate, tensile strength, tear resistance, shear performance, 180 degree peeling, 90 degree peeling and other properties of packaging materials ; By changing the fixture, the device can also be extended to the film puncture resistance, puncture force of the infusion bag cover, puncture / pull force of the soft rubber stopper or oral liquid cap , opening force of the combined lid, jelly cup and yogurt cup opening force, The pull-out force of the cosmetic brush or the toothbrush bristles, the unwinding force of the tape, the separation force of the protective film, the tension of the ziplock bag, and the like, and the detection of various products or packaging properties.
(2) This equipment complies with various national and international standards, such as ISO 37 , GB 13022 , GB 8808 , GB 1040 , GB 4850 , GB 7753 , GB 7754 , GB 453 , GB/T 17200 , GB/T 16578 , GB/ T 7122 , GB/T 2790 , GB/T 2791 , GB/T 2792 , ASM E4 , ASTM D828 , ASTM D882 , ASTM D1938 , ASTM D3330 , JIS P8113 , QB/T 2358 , QB/T 1130, etc.
4.3 Equipment parameters
- The equipment specifications are available in 100 N , 200 N , and 500 N with an accuracy of 1 level.
- The test speed of the equipment is 7 steps , 50 mm/min , 100 mm/min , 150 mm/min , 200 mm/min , 250 mm/min , 300 mm/min , 500 mm/min , depending on the user. Test standards require selection.
- A test machine integrates seven independent test procedures, such as stretching, peeling, tearing, and heat sealing, to provide users with a variety of test items.
- The sample is clamped pneumatically, and the clamping portion is evenly stressed to ensure the accuracy of the test data.
- Intelligent configuration such as limit protection, overload protection, automatic return and power-down memory to ensure the user's operation safety.
- By matching the Lystem TM laboratory data sharing system, the test data and device information can be reported simply by setting up and operating, and the centralized and systematic management of laboratory test data can be easily realized.
5 , the test process
(1) cut out to a width sampler 15 mm were cut from each heat-sealed packaging samples of the moon cake, the developed length of 100 mm as a sample strip 10, each of the heat sealed samples were sampled from the three samples.
(2) Set parameter information such as sample width and test speed.
(3) The sample is unfolded, and the two ends are respectively clamped on the upper and lower chucks so that the long axis direction of the sample coincides with the center line of the upper and lower chucks, and the heat sealing portion of the sample and the upper and lower chucks The distance between them is equal.
(4) Click the “ Test †button, the test starts, and the instrument automatically displays the test result of Zui.
6 , test results
The average sealing strength of the mooncake packaging samples was 25.431 N/15 mm , the average sealing strength of the lower sealing edge was 31.025 N/15 mm , and the average sealing strength of the back sealing edge was 15.964 N/15 mm .
7 , conclusion
The sealing effect of the heat sealing of the packaging bag has an important influence on the sealing performance of the packaging bag and the impact resistance of the sealing. The sealing strength is the physical index to characterize the sealing effect of heat sealing. In this paper , the sealing strength of the upper and lower sealing edges and the back sealing edge of the moon cake packaging bag is tested by XLW (M) intelligent electronic tensile testing machine. The repeatability of the test results is good, the test result Accurate and reliable, the instrument is easy to operate. In addition to the seal strength, the oxygen permeability is also concerned, sealing performance, solvent residue, friction coefficient performance bag moon cake, related testing equipment and services, you can view a company or blue light landing call. Labthink is committed to providing professional packaging inspection equipment and services to customers around the world, focusing on solving difficult problems in packaging. Labthink is looking forward to enhancing technical exchanges and cooperation with enterprises and institutions in the industry!
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