Validation method of barrier performance of duck neck aluminum-plastic composite film
Abstract : Duck neck is a common flavor snack, delicious and tasty, which is popular with consumers. During the circulation process of the duck neck finished product packaging, quality problems such as bagging and air leakage often occur, which brings unpleasant consumer experience to consumers. The problem of causing similar quality problems in the duck neck is often caused by poor barrier properties of the packaging material. This article uses the OX2/230 Oxygen Transmission Rate Test System and FDT-02 Kneading Tester independently developed by Jinan Languang Electromechanical Technology Co., Ltd. to verify the barrier properties of the duck neck aluminum-plastic composite packaging bag and explains the principle of the device. The parameters and operation process have certain reference and guiding significance for controlling the barrier properties of aluminum-plastic composite film.
Keywords : duck neck, meat products, oxygen permeability, oxygen barrier, aluminum-plastic composite film, aluminum composite film, kneading, pinhole
1 , the meaning
Duck neck is a high-protein, low-fat food, with Qi and tonic, beauty and other beauty effects, fresh and beautiful, is a leisure food for all ages. The rich nutrients of duck neck also impose stringent requirements on the barrier properties of packaging materials. If the oxygen barrier properties of the packaging materials are low and the oxygen transmission rate is high, the amount of oxygen that the neck of the duck is exposed to is higher. Prone to mildew, swelling bag, odor and other quality problems.
At present, most of the common duck necks are packaged in aluminum-plastic composite film. For such aluminum foil-containing packaging materials, due to the presence of aluminum foil material, it has the characteristics of impatience in rubbing, that is, it is susceptible to creases under the influence of external forces. Pinholes and other defects, resulting in reduced barrier properties, so for aluminum-plastic composite film, aluminized film plastic composite film materials, oxygen barrier, not only should pay attention to the oxygen permeability before no rub, but also pay attention to its rubbing The oxygen transmission rate.
Figure 1 duck neck aluminum plastic composite bags
2 , related test standards
At present, the testing standards for oxygen permeability of soft plastic packaging in China are GB/T 1038-2000 " Pressure difference method for testing plastic film and sheet gas permeability ", GB/T 19789-2005 , Packaging materials, plastic films and sheets. Oxygen permeability test coulometric detection method, etc., but there is no relevant testing standard in the domestic rubbing test. When used domestically, refer to the American standard ASTM F 392 .
3 , test sample
A brand of duck neck aluminum plastic composite film packaging bag.
4 , test equipment
In this paper, the use of Labthink OX2 / 230 oxygen transmission rate test system, FDT-02, Labthink rubbing tester of the plastic composite film to oxygen-permeability test and rubbing test.
Figure 2 OX2/230 oxygen transmission rate test system
Figure 3 FDT-02 Kneading Tester
4.1 Test principle
The OX2/230 Oxygen Permeability Test System uses the equal pressure test principle. The pre-treated sample is clamped between the test chambers. Oxygen or air flows on one side of the film. High purity nitrogen is on the other side of the film. Flowing, oxygen molecules diffuse through the membrane to the high purity nitrogen on the other side and are carried by the flowing nitrogen to the sensor. The oxygen concentration measured by the sensor is analyzed to calculate parameters such as oxygen permeability. For packaging containers, high-purity nitrogen flows in the container, and air or high-purity oxygen surrounds the outside of the container.
FDT-02 Kneading Tester simulates the actions of kneading, folding and compressing of packaging materials during production, processing, transportation, etc., and performs horizontal and vertical omnidirectional kneading on the sample. The change in barrier properties before and after rubbing the sample is detected. Or change the number of pinholes to determine the material's resistance to rubbing.
4.2 Scope of application
(1) OX2/230 Oxygen Transmission Rate Test System
Films: Suitable for oxygen permeability test of various plastic film, plastic composite film, paper-plastic composite film, co-extruded film, aluminized film, aluminum foil, aluminum-plastic composite film and other film-like materials. Sheets: Oxygen permeability test for various engineering plastics, rubber, building materials and other sheet materials, such as PP sheet, PVC sheet, PVDC sheet and so on. Containers: Suitable for testing the oxygen permeability of bottles, bags, cans, boxes, and barrels made of plastic, rubber, paper, paper-plastic composite, glass, metal, etc., such as Coke bottles, peanut oil drums, Tetra Pak packaging, Vacuum packaging bags, three metal cans, plastic cosmetic packaging, toothpaste hoses, jelly cups, yogurt cups, etc. Standard: meet a number of national and international standards ISO15105-2, GB / T19789, ASTM D3985 , ASTM F2622, ASTM F1307, ASTM F1927, JIS K7126-2, YBB00082003 and so on.(2) FDT-02 Kneading Tester
Films: Suitable for plastic film, thin film, composite film anti-wrinkle performance test, such as the packaging of a variety of composite film, aluminized film, aluminum plastic composite film, nylon film, coating film. Paper type: Suitable for the anti-rubbing performance test of paper materials. Standard: Meets ASTM F392 .4.3 Equipment Parameters
(1) OX2/230 Oxygen Transmission Rate Test System
Test range: 0.01 to 6,500 cm3/(m2·d) for film samples and 0.0001 to 60 cm3/(pkg·d) for containers . Number of specimens: Three identical or different specimens can be tested simultaneously . Test temperature: 15 ~ 55 °C . Test humidity: 0%RH , 35%RH ~ 90%RH . Test gas: O2 , air, etc.(2) FDT-02 Kneading Tester
Rubbing frequency: 45 beats / minute. Kneading angle: 440° or 400° . Horizontal stroke: 155mm or 80mm . Number of Samples: One test can test four identical or different samples simultaneously . Rubbing mode: Five rubbing modes are available.5 , the test process
5.1 Oxygen permeability test process before rolling
(1) Sample preparation
Samples were taken from the surface of the pretreated sample to take 3 samples .
(2) Sample mounting
Apply a layer of vacuum grease to the perimeter of the test chamber, attach the sample to the test chamber, and clamp with the specimen clamping device. As shown in Figure 4 .
Figure 4 sample setting process
(3) Sample testing
Set the test parameters, turn on the vacuum pump, and start the test. After the end of the test, the system automatically calculates the test results based on the measured data.
5.2 rubbing test process
(1) Sample preparation
Use a sampler to cut 2 specimens of 280 mm × 200 mm from the specimen surface .
(2) Sample mounting
Use the sample holder to fix the sample on the rotating shaft. As shown in Figure 5 .
Figure 5 Sample fixation
(3) Sample testing
Select the appropriate rubbing mode and start the test. When the number of rubbings corresponding to the selected mode is completed, the test is stopped.
5.3 Oxygen permeability test procedure after rubbing
Prepare a sample from the surface of the rubbed sample according to the procedure in 5.1 to test the oxygen permeability after rubbing.
6 , test results
The oxygen transmission rate of the aluminum-plastic composite film for duck neck packaging before rubbing was 0.1364 cm3/(m2·d) , 0.1402 cm3/(m2·d) , and 0.1391 cm3/(m2·d) respectively , and it was 6 minutes in the C mode . After 270 rubs, the oxygen transmission rate after rubbing the sample was 10.1846 cm3/(m2·d) , 10.7351 cm3/(m2·d) , and 10.9430 cm3/(m2·d) .
7. Conclusion
Use of Labthink OX2 / 230 oxygen transmission rate test system, FDT-02 rub tester accurately tests before rubbing plastic composite film, the oxygen transmission rate after a simple operation, a true reflection of the barrier properties of packaging materials, equipment, The repeatability of the test data is good and the test efficiency is high. The aluminum-plastic composite film packaging material after the rubbing oxygen permeability increased significantly, the barrier properties greatly reduced, indicating that for the aluminum-plastic composite film, the test before and after rubbing oxygen permeability on the monitoring of packaging material barrier performance . In addition to testing the barrier properties described herein, the duck neck plastic composite film bags need to focus heat seal strength, puncture strength, sealing performance indicators detected, performance of these detection equipment that you can login in blue light website or call advisory. The more you understand, the more trust! Labthink expects to enhance technology exchanges and cooperation with enterprises and institutions in the industry!
Copyright Notice: The article is copyrighted by Jinan Languang Electromechanical Technology Co., Ltd.
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