1Test significance

Biscuits are a type of crispy snack made mainly from wheat flour, supplemented with sugar, oil, and other ingredients, and baked through a baking process. They are often used as a snack for people to temporarily satisfy hunger or relax during leisure travel or leisure time. Biscuits are sensitive to moisture, and when exposed to high moisture environments, they are prone to absorbing water vapor, resulting in a decrease in the crispness of the biscuits and even creating favorable conditions for the growth and reproduction of microorganisms, leading to mold problems in the biscuits. Therefore, improving the moisture resistance of biscuit packaging and reducing the water vapor content inside the packaging are of great significance for maintaining the good quality of biscuits.

2Current situation

The commonly used packaging for cookies is mainly plastic composite film and aluminum coated composite film. At present, there is a weighing method for testing the water vapor transmission rate of soft plastic packaging in China(Cup style method)The standard methods that can be referred to include electrolysis, humidity, and infrared methodsGB 1037-1988Test method for water vapor permeability of plastic films and sheets - Cup methodGB/T 16928-1997Test methods for packaging materials - Moisture permeabilityGB/T 21529-2008Determination of water vapor transmission rate of plastic films and sheets——Electrolytic Sensor MethodGB/T 30412-2013Determination of water vapor transmission rate of plastic films and sheets - Humidity sensor method(Published,2014year12moon1Number implementation).

3Test samples

Aluminum plated composite film is used for packaging a certain biscuit.

4Testing equipment

This article utilizesLabthinkLan GuangW3/031The water vapor permeability tester is used to test the aluminum coated composite film sample for biscuit packaging.

4.1 Test principle

This device is designed using the weighing method testing principle. During the experiment, the sample is clamped in a moisture permeable cup and the humidity on both sides of the sample is different, resulting in a certain humidity difference. According to the principle of gas diffusion, water vapor will pass through the sample from the high humidity side and enter the drying side, causing a change in the weight of the moisture permeable cup. By measuring the weight of the moisture permeable cup over time, the test results such as the water vapor transmission rate of the sample can be obtained.

4.2 Scope of Application

l Film Material: Suitable for testing the water vapor transmission rate of various plastic films, plastic composite films, paper plastic composite films, geomembranes, co extruded films, aluminum plated films, aluminum foil, aluminum foil composite films, waterproof and breathable films and other film like materials.

l Sheet: Suitable for various engineering plastics, rubber, and building materials(Waterproof materials for construction)Testing the water vapor transmission rate of sheet materials such as insulation materials, etcPPSheet materialsPVCSheet materialsPVDCSheets, nylon sheets, etc.

l Paper and cardboard: suitable for testing the water vapor transmission rate of paper and cardboard.

l Textiles and non-woven fabrics: suitable for testing the water vapor transmission rate of materials such as textiles and non-woven fabrics.

l Extended application: This equipment can also be extended to test the water vapor permeability of LCD screen film, solar backplane, sterile wound protection film, beauty facial mask, protective clothing materials, etc.

l This device meets multiple national and international standards, such asGB1037TheGB/T16928TheASTM E96TheASTM D1653TheTAPPI T464TheISO2528TheDIN53122-1TheJIS Z0208TheYBB00092003.

4.3 Equipment parameters

l The testing scope of this device is0.1 ~ 10000 g/m²·24hThe testing accuracy is0.01 g/m²·24h.

l This device can achieve3Simultaneous testing of individual samples, i.e. one test can obtain3The test results of individual samples.

l The test temperature range of this equipment is15 ~ 55℃The temperature control accuracy is±0.1℃The experimental humidity is10%RH ~ 98%RHThe humidity control accuracy is±1%RH.

l The standard blowing speed can ensure a constant humidity difference between the inside and outside of the moisture permeable cup.

l Provide two fast calibration methods, standard film and standard weight, to ensure the accuracy and universality of detection data.

l The moisture permeable cup weighing method designed by Brick Li Machinery effectively ensures the accuracy and stability of data.

l supportLystem^TMThe laboratory data sharing system enables easy centralization and systematic management of laboratory testing data.

l The calibration data recovery function effectively solves the adverse effects caused by misoperation, ensuring the safety of system operation to the maximum extent. The system can repair key information data according to user specified (separated) methods, such as the calibration data recovery operation of each sensor.

5Experimental process

(1)Cut a sample with a diameter of from the surface of the aluminum coated composite film sample packaged in cookies using a cutting tool74mmThe sample3The film.

(2)to, toward, at, facing3Add a certain amount of distilled water to a breathable cup and3Clamp the sample pieces separately3On a breathable cup.

(3)Open the test chamber door and install the sample3Place each breathable cup on the holder inside the test chamber and close the test chamber door.

(4)In the software system of the device, set parameters such as sample thickness, sample temperature and humidity, and click on the test option to start the test. The device automatically tests the weight of the moisture permeable cup at set time intervals, calculates and displays the test results such as the water vapor transmission rate of the sample based on the test data.

6Test results

The tested biscuit packaging is coated with aluminum composite film3The results of the water vapor transmission rate test for each sample are as follows:1.032 g/m²·24hThe1.061 g/m²·24hThe1.027 g/m²·24h.

7Conclusion:

Among the various performance indicators of biscuit packaging, water vapor permeability is one of the more important detection indicators, and the value of this indicator will have a direct impact on the quality of biscuits during the shelf life.W3/031The water vapor permeability tester is a professional testing equipment used for testing the water vapor permeability of soft plastic packaging. The equipment is easy to operate, highly intelligent, efficient in testing, and has high repeatability and accuracy in testing results. It can truly reflect the sample's resistance to water vapor.LabthinkLanguang has always been committed to providing professional package testing equipment and services for full (separated) ball customers. In addition to the water vapor transmission rate tester, we can also provide you with intelligent electronic tensile testing machines, thickness gauges, sealing instruments, oxygen transmission rate testers, friction coefficient testers, tear resistance testers, heat sealing testers, impact testers, cardboard box compression testers and other testing equipment. You can log in to the website of Jinan Languang Company for related equipment informationView or call directlyconsulting service The more we understand, the more we trust!LabthinkLan Guang is willing to use this opportunity to enhance technical exchanges and cooperation with enterprises and institutions in the industry.