Tel: +86 188 2689 9458
source:other news release time:2022-11-04 Hits:
Air permeability is a very important performance parameter of vacuum packaging bag, which is usually indicated by air permeability amount or air permeability index.
The air permeability is the amount of steam when a certain steam body stably passes through the total area of the enterprise for 24 hours under the condition of stable temperature and stable pressure difference (-), which is generally one atmospheric pressure difference (b) under the standard condition), and the enterprise is Cm '/m2 ● Dpa.
The permeability index is generally an atmospheric pressure difference under the stable temperature and pressure difference (-), the total area of the enterprise passing smoothly, the permeability of the enterprise's thin and thick raw materials (b) under the standard condition), and the enterprise is Cm '* cm/cm2. s+pa.
The testing equipment for permeability and permeability index is a permeability tester, which maintains a certain vapor pressure difference on both sides of the test piece under a certain temperature and environmental humidity, accurately measures the change of air pressure at the bottom pressure side of the test piece, and then calculates the permeability and permeability index of the tested sample.
It uses the best international micro pressure accurate measurement technology, and uses the eddy current principle to make the detection more convenient and feasible.
The test process is as follows:
(1) Turn on the chassis power first, then turn on the computer, run the test tool, and observe whether the O&M management system light flashes at a fixed frequency to check whether everything is normal in the system software.
(2) Turn the main gate valve of the test steam cylinder in the opposite direction, and then adjust the output pressure valve clockwise to 0.4 mpao
(3) Take down 3 required test pieces with a special sampler, and then check the wound at the bottom of the low signal variable earth. The edge of the test piece should be free of gaps and scars, and the surface of the test piece should be flat without scratches and damage.
(4) Adjust the temperature and humidity of the interface test according to Gb2918 for at least 4 hours.
(5) Put the selected test pieces on the test chamber table, place them successively, and completely cover the test. Compound processing technology and machine equipment for raw materials of plastic flexible packaging. Cover the upper chamber of the detection chamber and tighten the rocker to clamp the test piece.
(6) Click the "Customer Information Setting" button on the main screen of the computer, input the corresponding performance parameters (b) thickness of the test piece, measurement time), and click the "Save and Withdraw" button.
(7) Click the "Experiment" button on the computer screen, and the instruments and equipment will be gradually tested.
(8) During the whole process of detection, do not leave the instruments and equipment, and carefully observe the experimental curve graph displayed on the computer screen. When a part of the parallel lines of the curve graph exceed the range of the big grid abscissa axis set by the mobile phone software, it indicates that the experimental data information has become stable, and the experiment can be completed. Click the "Stop" button to terminate the experiment.
(9) The system will automatically pop up the test report, record the experimental data information, and click the "Save" button to return to the main screen.
(10) Open the upper chamber of the rotary release handle and take down the test piece to replace the rapid quantitative filter paper and test piece. Repeat the procedures (6), (7), (8) and (9) to carry out the experiment again.
(11) After the experiment is completed, loosen the upper chamber of detection, take down the test piece, and tighten it clockwise to keep it clear. After turning off the air navigation, click the "test" leg, and the working pressure value indicated in the left table of Chengjing Server is zero. Then click the "Srop" key, and unscrew the output pressure valve in the opposite direction.
Textured vacuum bag
One side of the textured vacuum bag is colorless and transparent, and the other side is pressed with tiny lines. The textured vacuum bag is made of seven layers of co extruded film without glue compounding. Many manufacturers say that glue is non-toxic. At present, competition among peers is fierce. Many manufacturers are impetuous and eager for quick success and instant benefit. Only cut corners on raw materials to reduce costs. Therefore, it is difficult to guarantee the quality of glue. In the process of cooking, the glue in the ordinary vacuum bag will boil out, and it is unknown whether it is toxic. Relatively speaking, the textured vacuum bag is hygienic and safe. The textured bag is not printed and will not be polluted by ink and chemical solvent. This is also the reason why people love the vacuum bag with lines.
Read recommendations:
Eco Friendly Plastic Mylar Pouch Stand Up 50ml 100ml 200ml 250ml Custom Aluminum Spout Pouch
zip lock bag for coffee Processing
Popular recommendation
3L 5L Bag-In-Box Wine Dispenser Coffee/ Juice/ Water/ Oil Bag-In-Box With Valve
Aluminum foil bag
Bag-In-Box
smart food Snack food bag company
custom printed spout pouches
disposable aluminum foil bag
printed snack food bags manufacturer
bag in box custom
gusset aluminum foil bag
juice bag in box wholesale
What are the advantages of liquid chemical packaging bags in transportation?
Spout pouch - a new fashion and portable option.aluminium spout pouch sales
Creative design of coffee bag
Customized milk tea packaging bag manufacturers
Bag material shelf life analysis of food packaging bags
Snack Pouches: The Ultimate Guide
Introduction to the functions, features and usage of spout bags
Introduction to Barcodes for Packaging Bags
There will be several "small holes" on the top of the coffee pouch bags, so what is the my
printed snack food bags price!Introduction to the Function of Food Packaging Bags
Precautions in the design of cat food bags.petco free dog food bag wholesale
Flexible Packaging's cutting requirements
What are the accessories for bagged water packaging bags.spouted stand up pouch
retort pouch pack custom.What are common packaging bag issues
Introduce the usage of Vacuum packing bag
Characteristics of various food packaging materials
The manufacturer distinguishes between high-temperature vacuum bags and frozen vacuum bags for you.v
What are the common bag types of food packaging bags
Eight Advantages of Composite Bags.printed snack food bags Factory
The structure of Spout POUCHES