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:
Smell Proof Stand Up Flat Bottom Pouch Coffee Bag /Coffee Beans Bag With Air Release Valve And Reusa
reusable Snack food bag Production
biodegradable spout pouches supplier
Snack food bag bulk wholesale.Learn about composite materials for food packaging bags
Popular recommendation
Super pouch
Custom Portable Reusable Drink Bags Stand Up Plastic Spout Pouches For Beverages Liquid Packaging
China Factory Baby Complementary Food Spout Pouch Baby Food Fruit Puree Bag With Spout Packaging Bag
mulberry mini pouch with handle sales
spout pouch bag wholesale
eco friendly spout pouches
spout pouches
zip lock bag for coffee wholesale
reusable Snack food bag manufacturer
clear spout pouch wholesale
What are the advantages of the bag in the BIB box.bag in box 5l
Stand Up Pouch Manufacturing Process- The Complete Guide
Composite packaging bag
Packaging bag development history
The difference between liquid bags and regular packaging bags
Various common sense of plastic packaging bags.valve plastic coffee bag
Super Pouches: Revolutionizing Flexible Packaging for Top-Line Packaging Solutions
Bag-In-Box: The Future of Flexible Packaging and Its Impact on Top-line Growth
Understand the wholesale prices of plastic packaging bags
What is the difference between plastic packaging bags and paper bags
The thickness control of vacuum packaging bag is very important
How to remove the static electricity of the packaging bag?
Classification of leather packaging.Flexible Packaging Film company
How long can you store food safely?
Production process and standards for paper plastic composite bags
What are the functions of food packaging bags from packaging bag manufacturers.food bags for packagi
Introduction and classification of composite packaging bags
Introduce the usage of Vacuum packing bag
There are some tips for identifying the material of plastic bags
The reason why the packaging bag is easy to tear open.aluminum foil bag large Production