Dairy products as the daily necessity, plays more and more important role in our life. Many dairy manufacturers, in order to meet the demands of customers, promote new products with new packages. The flexible package quality control of dairy products, thus, becomes more prominent. Hereinafter is the introduction to the flexible package quality control and analysis.

Further details please feel free to contact Shirley via email: trade2@labthink.cn, (tel)0086-531-85811021 or visit our web: http://www.labthink.cn/en

1. Gas and Water Vapor Transmission Testing and Analysis of Dairy Flexible Packaging Materials

The gas and water vapor transmission property tests of dairy packaging materials are of vital importance in dairy industry, and affect the product quality directly. Mocon (US), PBI (Denmark) and PERME OX2/230 Oxygen Transmission Rate Test System can all test the relevant indexes. Labthink PERME OX2/230 Oxygen Transmission Rate Test System is of coulometric principle and equal pressure method for the oxygen transmission property testing of film, sheets and containers (bottles, bags, cans and boxes). This system is advanced in its function and accuracy: master base-satellite mode, one master base can connect 9 satellite bases so as to realize simultaneous testing of 30 specimens with greater testing efficiency.

Oxygen permeation tests of dairy packaging materials are of vital importance in dairy industry, and affect the product quality directly. coulometric principle and equal pressure method

2. Testing and Analysis of the Heat Seal Strength of Dairy Flexible Packages

Heat seal is an important index for packaging materials. Every kind of packaging material needs to be manufactured into bags to pack kinds of products, of which, heat seal is a necessary procedure to accomplish packaging process. The seal of dairy products needs to achieve certain strength to burden certain gravity of the content and to avoid breakage during circulation process. Labthink XLW (PC) Auto Tensile Tester can accomplish this task professionally. This instrument can automatically read the data and automatically judge the strength value as well as carry out data superposition of the same specimen group. Besides, labs need to carry out seal strength/heat seal strength testing with the additional help of heat seal tester to prepare the specimen.

3. The Testing and Analysis of the Coefficient of Friction of Dairy Flexible Packaging Materials

The coefficient of friction tests are for the control and adjustment of open easiness of flexible packages as well as packing speed of packing machines, and other production quality and processing indexes. Nowadays, Chinese instruments have caught up with the international technology with unique coefficient of oscillation setting for films, paper of different qualities. The intellectual data processing can effectively shows credibility of the results. Large LCD displays the real time curve and, thus, shows the evenness of the coefficient of friction directly. For packaging material manufacturers, they can decide the type and quantity of the smoothness agent and open easiness agent to control coefficient of friction through testing so as to help them with a better quality control of raw materials. At present, there are not many existing standards for coefficient of friction of dairy products. The existing ones are GB10006, ASTM D 1894 and ISO 8295, etc. But, these standards are of different testing requirements which bring the manufacturers into great trouble. Labthink MXD-02 Coefficient of Friction Tester is multi-method applicable so as to resolve the problem of method confusion for the manufacturer.

4. Leakage Testing and Analysis of Dairy Packages

Leakage is also an important index of flexible packages, especially for dairy products, and has great influence on product quality. Inferior sealing performance is the main cause of the following leakage and deterioration. There are several methods to test leakage, and the most common method is by leak tester. Utilize vacuum method, and keep the specimen under pressures of -30kPa, -50kPa, -70kPa and -90kPa for 0.5 minute respectively. Pay attention to the leakage during vacuumizing and vacuumed periods if successive bubbles appear. Isolated bubble will not be regarded as leakage. Through the testing of leakage, we can evaluate the quality of the packages and judge the corresponding sealing processing.

The above-mentioned method is visual and quality testing method. If quantitative seal and leak performance needs to be tested, positive pressure method testers can be adopted. For example, Labthink LSSD-01 Leak and Seal Strength Detector.

5. The Testing and Analysis of the Composite/Bond Strength of Dairy Packaging Materials

The flexible packages of dairy products, like aseptic pack, are mainly made of composite plastics or composite paper, of which, the stronger combined/bond strength is preferred as well as favorable corresponding tear resistance and destructive resistance. After the composite materials have been processed into bags, they are easy to be influenced by the wet or chemical ingredients in the fierce environment and the combined layers are easy to be injured. Using high viscosity tackiness agent will surely achieve high quality composition, but with more production costs.

The qualified and cost-saving composite material needs to undergo quality-testing analysis for the layers so as to find proper composition indexes. Nowadays, both the domestic and abroad tensile testers can execute peeling tests, but they are of the universal type with simple calculation. The Auto Tensile Tester Manufactured by Labthink Instruments Co. Ltd. is specializing in the test of flexible package line and in complete compliance with GB 8808-88 for the peeling tests of flexible materials. This tensile tester has the following merits: unique both ends breaking-off function, the strength values are obtained with integration method of the middle part; accurate testing results with real time strength value and curve display for binder/tackiness agent evaluation; to know the evenness of the material with the fluctuation of the curves; to know the stability of the group samples through data curve superposition so as to adjust processing and composite indexes.

6. Other Quality and Analysis of Dairy Packages

The ultimate aim of dairy packages is for promotion. The well printed dairy packages will definitely attract the sight of more customers and expand market share. The density & density difference, color & color difference, superposition-rate and printing contrast can be measured by X-rite Densieye; but for the testing of ink layer bond strength or the abrasion resistance of dairy packages, Labthink YGJ-02 Adhesive Tensile & Shear Tester and BLJ-02 Disk Stripping Tester can be adopted so as to achieve quality control purpose in printing and color.

The above dairy flexible package testing indexes are critical for processing development and quality improvement.

Further details please feel free to contact Shirley via email: trade2@labthink.cn, (tel)0086-531-85811021 or visit our web: http://www.labthink.cn/en