Tel: +86 188 2689 9458
source:other news release time:2022-12-02 Hits:
The traditional packaging tightness testing is usually destructive manual testing methods, such as electrolysis test, dye penetration test and bubble test. The main disadvantage of destructive testing is that it is unable to detect every packaged product, and it takes time and labor to detect.
1. Test method for rigid sealed packaging
The traditional methods for testing the tightness of rigid containers mainly include visual inspection, talcum powder method and sealing performance monitoring method. These three methods have applicability and obvious defects. Visual inspection is simple and convenient, but only applicable to obvious opening. The inspection of talcum powder is greatly affected by packaging shape and human factors, and its reliability is not high. Although the reliability of the detector is high, the sealed package is also damaged during the detection. There are many working links from drilling to resealing, which is not conducive to work. For packages with good sealing test results, the test process will produce many side effects.
2. Dyeing method
This method is usually applicable to the detection of composite bags with very little air content. The method is to take out the contents of the sample, wipe the inside of the sample, pour the test liquid (colored water solution with obvious color difference with the filter paper) into the sample, and seal the mouth. Place the sample on the filter paper for more than 5 minutes, and observe the leakage of test liquid from the sample. Then turn the sample over and test the other side.
It can be seen from this that the dyeing method can only detect whether there is leakage at the side of the flexible packaging. Since the original seal has been damaged, it is impossible to judge whether there is leakage at the original seal.
3. Bubble method
Bubble method is also called vacuum method or water decompression method. This method is usually applicable to the detection of composite bags with high air content. The specific methods can be divided into the following two: vacuum pump method and vacuum generator method. Because the vacuum formed by vacuum pump method is pulsating airflow, the vacuum of packaging and printing is unstable; Long vacuum forming time; The vacuum is difficult to maintain and the sealing performance is poor; Pointer pressure display, low accuracy. Therefore, it has been phased out.
The vacuum generator method is usually applicable to the detection of composite bags with high air content. Bubble method is to soak the tested sample in a liquid at a certain temperature, and observe whether there are bubbles on the surface of the sample in the immersion solution with a low power microscope or naked eye. The soaking solution is generally a liquid with stable performance and no damage to the product. The temperature used should be controlled within the tolerance range of the sample, otherwise it will lead to wrong detection. Sometimes, in order to improve the detection effect, the immersion solution is usually pressurized or decompressed.
Read recommendations:
Custom Portable Reusable Drink Bags Stand Up Plastic Spout Pouches For Beverages Liquid Packaging
Environmental protection of coffee bags
Why are degradable plastic bags more expensive than ordinary plastic bags?
Popular recommendation
Flexible packaging film roll
China Factory Baby Complementary Food Spout Pouch Baby Food Fruit Puree Bag With Spout Packaging Bag
Pouch with handle
spout pouch packaging bags distributors
spout pouch machine wholesale
Flexible packaging film roll price
spout pouch packaging company
kraft spout pouch
digital flexible packaging price
spout pouch machine supplier
digital printing flexible packaging
The Revolution in Liquid Packaging
What are the special properties of aluminum foil bags explained by the manufacturer of aluminum foil
How to test the packaging bag.
Bag material shelf life analysis of food packaging bags
What are the main uses of bag-in-box?
Efficient protection, easily carry: new choice of liquid packaging bag.juice bag in box company
How did the bag pattern come from?
Packaging bag classification for liquid products
Customized milk tea packaging bag manufacturers
What are the categories of KRAFT PAPER POUCHES?stand up ziplock kraft paper pouch
Aluminum foil bag manufacturers are widely used in aluminum foil bags and have many advantages
flexible packaging film properties Solution.Reasons and control measures for easy breakage of organ
Reasons for aging of liquid packaging bags.flexible packaging pouches
brown kraft paper pouch company.How to better use food packaging bags
What types of packaging bags can be classified according to bag type
Advantages of using plastic packaging bags.flexible pouches price
How long can you store food safely?
Advantages and applications of sucking bags
Development Trend of Liquid Box Bag Industry