Tel: +86 188 2689 9458
source:Industry News release time:2022-11-11 Hits:

Visual inspection of appearance includes inspection of flatness and transparency of vacuum bag. It is mainly used to detect whether there are obvious scratches and pinholes on the surface, and whether there is pollution at the seal. The appearance inspection methods are as follows:
1: Vacuum bag surface wiredrawing "inspection. Place the vacuum packaging bag in the center of your hand, aim at the 40w fluorescent lamp, and gently shake it. Through the reflected light on the surface of the composite bag, you can clearly find whether there are scratches or marks on the surface of the vacuum packaging bag, which is often called "bag surface wiredrawing" in the industry. The wire drawing phenomenon is mostly caused by the unclean traction guide roller of the bag making machine, so it must be ensured that the guide roller is clean. In addition, if the guide roller does not rotate, it will also cause drawing failure of the vacuum packaging bag.
2: Check the flatness of the vacuum bag. Place the vacuum bag on a flat table. If the surface is bent, warped outwards or arched inwards, the flatness is poor,
Otherwise, it indicates good flatness. The reasons for poor flatness are generally as follows: high bag making temperature has damaged the stress stiffness of the inner layer of the composite bag; Unreasonable structure composition; The material itself is uneven in thickness.
3: Check the transparency of the vacuum bag. Transparency is particularly important for some products because there is no pattern on a large area. The transparency test method is: take a finished bag and observe it through the indoor indirect light source. If there are "pockmarks", "rings", "fog" and other phenomena in the blank, it indicates poor transparency, otherwise it indicates good transparency.
Read recommendations:
spout pouch packaging bags supplier
ordering flexible packaging film roll sales.The shortcomings of environmental bags
Causes and solutions for the difficulty of aluminum foil bags.aluminum foil bags for grilling
Popular recommendation
Spout pouch
Custom Print Side Gusset Coffee Pouch Black Matte Coffee Beans Packaging With Valve
Kraft paper pouch
kraft spout pouch maker
spout pouch machine Manufacturing
super pouch maker
aluminium spout pouch manufacturer
refillable spout pouches sales
spout pouches wholesale
eco friendly spout pouches Factory
Common types of transparent vacuum packaging bags
Shaped Pouches: The Ultimate Guide
What is the difference between vacuum bag and aluminum foil bag
aluminum foil bags for cooking manufacture.Future development trend of facial mask packaging bags
Different products have different standard requirements for composite packaging.stand up coffee pouc
The role of the coffee bag
What is the function of the hole on the coffee bag
Introduction to the functions of liquid packaging bags
Requirements for medical sterilized paper plastic packaging bags.coffee pouch with valve packaging S
What are the advantages of plastic packaging bags
The food vacuum bag takes advantage of each other and the two materials are compounded together
vanishing coff packaging bag.Production process of non-woven packaging bags
How to remove the air from the bag?
Do you know what a facial mask bag is?
What material is good for vacuum Vacuum Zipper Bag?zipper vacuum sealer bag
How to choose a bag type of food packaging bags?
Why is it easy to change the gas content in inflatable packaging of nut products?
Requirements for medical packaging performance
Functions of packaging bags
Advantages of using plastic packaging bags.flexible pouches price