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:
What are the advantages of the bag in the BIB box.bag in box 5l
Popular recommendation
Coffee & Tea pouch
Spout pouch
Aluminum foil bag
spout pouch packaging bags supplier
mulberry mini pouch with handle
recyclable spout pouches manufacture
bag in box packaging distributors
bag in box Processing
Vacuum zipper bag manufacture
mulberry mini pouch with handle sales
What does a bag in a box look like?
What are the general forms of beverage and food liquid bags?
bag for food packaging.What are the application scope of composite packaging bags
Hitting the pain points of gift box packaging directly, three simple points make packaging customiza
Several common coffee bag materials
Packing bag sealing brittle and brittle break how to do?
Super Pouches: Revolutionizing Flexible Packaging for Top-Line Packaging Solutions
New machine 1L-250L April,17,2023
What are the aspects of food packaging?reusable Snack food bag Manufacturing
How to Select the Material of Food Vacuum Packaging Bag
Requirements for medical packaging performance
Packaging.aluminum foil bag large Production
Food packaging bags that need high temperature characteristics.biodegradable clear mailing bags Manu
What Food Vacuum Zipper Bag do you see?pint zipper vacuum bag custom
Decomposition time
mini Snack food bag wholesaler.How to identify packaging bags that are environmentally friendly and
How to prevent Food Bag aging.petco free dog food bag Processing
Can I use a vacuum bag to keep food safe?
Vacuum and vacuum inflatable soft packaging of food
flexible packaging film properties distributors.What is an octagonal sealed bag