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:
Wholesale High Barrier Plastic Stand Up Flat Bottom Pet Dog Food Packaging Bag
packaging spout pouch Manufacturing
biodegradable spout pouches company
About the thickness of vacuum packaging bag
reusable Snack food bag price.Analyze the composition of plastic packaging bags
Popular recommendation
China Factory Baby Complementary Food Spout Pouch Baby Food Fruit Puree Bag With Spout Packaging Bag
Wholesale High Barrier Plastic Stand Up Flat Bottom Pet Dog Food Packaging Bag
125g 250g 500g 1kg Aluminum Foil Flat Bottom Coffee Bean Bags With Valve
spout pouch packaging wholesaler
spout pouch packaging bags distributors
digital flexible packaging price
spout pouch packaging bags company
spout pouch serves Production
spout pouch bags Production
mini pet food bag company
How to determine whether the food packaging bag is regular?
What are the inspection standards for food packaging bags?
Food vacuum packaging bag: a very convenient packaging method
Super Pouches: Revolutionizing Flexible Packaging for Top-Line Packaging Solutions
Top-line packaging as a professional Bag-In-Box manufacturer, committed to producing high-quality pa
stand up pouch coffee packaging wholesaler!How to order universal vacuum packaging bags?
The origin of aluminum foil bags!aluminum foil bags for cooking distributors
What are the advantages of plastic packaging bags
Get information about olive oil storage
mini Snack food bag Solution.How to Choose a Qualified Food Packaging Bag
recyclable spout pouches.Non woven packaging bags
The use of aluminum foil bags.aluminum foil bags for grilling
Folding packaging bag
The price of fruit juice bags is influenced by the following factors.beverage bag manufacturers
Detailed introduction about food packaging bags
The development trend of domestic food packaging.printed snack food bags distributors
petco free dog food bag Solution.How to handle the odor of food packaging bags
Pay attention to these points of daily use of plastic bags.Flexible packaging film roll Packaging Ma
Tell you the factors that affect the food packaging bag.petco free dog food bag
What is the color printing aluminum foil bag?