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Moisture-proof Package & Quality Control Solutions

Moisture-proof Package are important for package quality, moisture-proof package quality control is therefore, very necessary. Moisture proof package is widely used in machinery, electronics, foodstuff, medicine and daily care, etc. It is a most commonly used protection against moisture during logistics. Moisture proof package avoids rusts and deterioration of the packed contents effectively. Labthink, as the excellent provider of testing instruments and testing services, integrates moisture proof methods with relevant methods for introduction.

The Moisture Transmission Testing for Moisture Proof Package

The moisture proof packages are tested according to cup method as regulated in the standards. Cup method is another name for weighing method when testing moisture. Its principle is to test the weight differences of the cup within a unit time so as to get the parameters such as moisture transmission quantity. Hereinafter, we take Labthink TSY-T series of testers as example. This series has four testers, all of which are of weighing method.

The traditional testing method is to utilize cup, constant temperature chamber and scale to measure manually. However, owing to the human interferences, there would be a great influence on testing results, such as long testing duration and low accuracy. Labthink TSY-T series of moisture transmission testers are the global innovative fully automotive testing mode, complying with testing requirements as well as standards. The only thing the operator needs to do is to place the prepared specimen into the cup and start the tester. Then, the tester operates, judges, ends and prints the testing results automatically. The whole process is intellectual with no human interferences and thus, brings forward accurate and reliable testing results.

Besides, in actual application, the packaging material must undergo procedures such as forming, inserting and heat seal, etc; and uneven thickness and inferior sealing sometimes occur. This requires testing for packaging materials as well as the whole moisture proof package. Labthink PERME W3/330 Moisture Transmission Testing System successfully meets the double testing need. This testing system is of master-satellite mode, a master base can connect 9 satellite testers so as to realize 30 kinds of materials tested at the same time.

2. Heat Seal Strength Testing for Moisture-proof
The heat seal strength of the moisture proof packages should be no less than 30N/5cm according to some standards.

Labthink HST-H3 Heat Seal Tester is for the specimen preparation of the heat seal testing procedures. Tensile tester is to separate the seal so as to test heat seal strength.

Labthink XLW series tensile testers are specialized in the heat seal strength testing for moisture proof packages. A full automatic testing can be accomplished only by pressing the button ‘Heat Seal Strength’. Besides, this tester can test the elongation, peeling strength, tearing strength and puncture of the laminated layers of the moisture proof package.

3. The Seal Performance Testing of Moisture-proof Packages

The seal performance testing of moisture-proof package can be accomplished with Labthink MFY-01 Leak Tester. This tester consists of mainframe, vacuuming device and vacuum chamber. Through testing, pinhole, crack, inferior seal and other defects can be found.

First, place the package into the vacuum chamber filled with water, set the vacuum maintaining time between 30 to 60 seconds. The vacuum rate is set as one of the following: 20, 30, 50 or 90kPa. Then, start testing to achieve preset vacuum rate and maintain the vacuum maintaining time. Observe the leakage during vacuuming and vacuum maintaining periods so as to see if there are bubbles. A single separated bubble can not be regarded as specimen leakage.

The above is a brief introduction on packaging testing standards and methods as well as testers. Labthink is willing to share more with you in quality control and testing solutions.

About the Author

Labthink Instruments Co., Ltd.
No. 144 Wuyingshan Road, Jinan 250031, China
Tracy Bao info@labthink.cn
Tel: 0086 531 85061153 fax:0086 531 85812140

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