Detection scheme of BOPP cigarette envelope on external water vapor barrier
BOPP cigarette film water vapor barrier performance is an important factor affecting the quality of cigarettes during cigarette circulation and shelf life. In this paper, Labthink blue light W3/031 water vapor transmission rate tester is used to test the barrier performance of BOPP cigarette film on the external water vapor, and the basic process of the test, the detection principle and the applicable scope of the test equipment are introduced. Wet performance test equipment and test methods can be referred to.
1, meaning
Cigarettes are made by roasting and shredded tobacco into a cylindrical shape. They need to be packaged or stored in a dry environment to prevent the cigarette from being damp and mildew. Therefore, the soft plastic envelope used outside the cigarette pack is mostly biaxially stretched. Propylene film (BOPP), which has high transparency and gloss, good shrinkage and certain moisture resistance and aroma retention.
If the BOPP cigarette film has poor moisture resistance, that is, the water vapor transmission rate is too large, the cigarette is prone to moisture and mildew in a high-humidity environment, which not only increases the risk of deterioration of cigarette quality and taste, but also shortens the shelf life of the cigarette. . Therefore, cigarette manufacturers should strictly control the barrier properties of BOPP membrane materials to water vapor.
Figure 1 BOPP cigarette envelope
2, reference standard
The domestic water vapor barrier test methods for composite film and sheet packaging include weighing method (cup method), electrolysis method, infrared method and humidity method. The reference method standards are GB/T 1037 "plastic film and sheet". Water vapor permeability test method, cup method, GB/T 21529 "Determination of water vapor transmission rate of plastic film and sheet, electrolytic sensor method", GB/T 26253 "Infrared detector for measuring water vapor transmission rate of plastic film and sheet" Law, GB/T 30412 "Plastic film and sheet water vapor transmission rate measurement humidity sensor method", the reference standard is GB/T 1037 "plastic film and sheet water vapor test method cup method".
3, test samples
BOPP cigarette film used by a tobacco brand.
4, test equipment
Jinan Languang Electromechanical Technology Co., Ltd. independently developed the W3/031 water vapor transmission rate tester.
Figure 2 W3/031 water vapor transmission rate tester
4.1 Test principle
W3/031 adopts the principle of wetting cup weighing method. Under certain temperature, the specific humidity difference is formed on both sides of the sample. The water vapor passes through the sample in the moisture permeable cup and enters the dry side. The amount of change in the moisture permeability of the moisture permeable cup over time is determined by parameters such as the water vapor transmission rate of the sample.
4.2 Scope of application
(1) This equipment is suitable for water vapor transmission rate test of plastic film, sheet, paper, cardboard and its textiles, non-woven fabrics and so on.
Film material: Suitable for water vapor transmission rate test of film materials such as plastic film, paper-plastic composite film, geomembrane, aluminized film, aluminum foil, waterproof breathable film;
Sheet type: Suitable for water vapor transmission rate test of sheet materials such as PP, PVC sheet, PVDC sheet, nylon sheet Material, etc.
Textiles and non-woven fabrics are suitable for water vapor transmission rate testing of textiles, non-woven fabrics, etc.;
It is also suitable for water vapor transmission rate testing of liquid crystal display films, solar back sheets, sterile protective films, and beauty masks.
(2) This equipment can meet a number of national and international standards, such as GB 1037, GB/T 16928, ASTM E96, ASTM D1653, TAPPI T464, ISO 2528, DIN 53122-1, JIS Z0208, YBB 00092003.
4.3 Equipment parameters
Test range: 0.1 ~ 10,000 g / m2 · 24h;
Number of samples: 1 ~ 3 pieces (data are independent);
Resolution: 0.0001 g;
Test temperature range: 15 °C ~ 55 °C, temperature control accuracy ± 0.1 °C;
Test humidity range: 10% RH ~ 98% RH (standard 90% RH), temperature control accuracy ± 1% RH;
With the LystemTM laboratory data sharing system, test data and device information can be reported simply by setting up and operating, making it easy to centralize and systematically manage laboratory test data.
5, the test process
(1) Use a sampler to cut three samples of a sample with a diameter of 74 mm for testing.
(2) Install the sample on the moisture permeable cup and close the glass seal door.
(3) Set the sample name, sample thickness, test temperature, test humidity and other parameters.
(4) Start the air supply and click the “Start Test†option.
(5) After the test is over, the instrument automatically calculates and displays the test results.
6, test results
The water vapor transmission rates of the samples to be tested in this paper are: 2.4715 g/(m2·24h), 2.6243 g/(m2·24h), 2.1478 g/(m2·24h).
7. Conclusion
W3/031 Water Vapor Transmission Rate Test System is a professional instrument for testing the water vapor transmission rate of film, sheet and other packaging materials. It has simple operation, high test accuracy and good repeatability, and can accurately reflect BOPP cigarette packets. The moisture barrier of the film. Labthink is a company specializing in R&D and testing services for packaging inspection equipment. It aims to provide customers around the world with high-level packaging inspection equipment and intimate and convenient packaging inspection services. It has provided tens of thousands of resistances to customers around the world for many years. Wet testing service. Learn about related testing equipment and services, you can log in to view. Labthink is looking forward to enhancing technical exchanges and cooperation with enterprises and institutions in the industry.
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