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
spout pouch machine Production
smart spout pouch distributors
Packaging has higher hygiene requirements for food bags.smart food snack bags distributors
Processing trend of PET FOOD BAG Clip.petco free dog food bag
Popular recommendation
Custom Print Side Gusset Coffee Pouch Black Matte Coffee Beans Packaging With Valve
3L 5L Bag-In-Box Wine Dispenser Coffee/ Juice/ Water/ Oil Bag-In-Box With Valve
Super pouch
Spout pouch flexibility Vendor
bag in box manufacture
spout pouch packaging supplier
bag in box packaging Manufacturing
bag in box wine
super pouch tool bag wholesale
bag in box maker
Advantages of Juice Packaging in Boxes and Bags
Vacuum packaging bag.food vacuum bag
How to Select the Material of Food Vacuum Packaging Bag
coffee bag with one way valve distributors.The thickness of each layer of the composite packaging ba
Packaging bag classification for liquid products
bag for food packaging.What are the application scope of composite packaging bags
Tell you how to distinguish the material of the vacuum packaging bag
Coffee Pouch: Ultimate Guide
The characteristics and functions of multi -layer composite independent bags
Packaging bag printing type.recyclable spout pouches supplier
Classification of leather packaging.Flexible Packaging Film company
retort pouch pack custom.What are common packaging bag issues
The preservation characteristics of vacuum frying food
Vacuum packaging bag is a choice with strong health awareness
Coffee Bag's four types of packaging
Explanation on Flexible Packaging.flexible packaging supplier
Analysis of the reasons why water packaging bags are prone to breakage.plastic pouches for liquids
What packaging form is the bag in the box.bag in box wine
The advantages and characteristics of bagged red wine in a box.bag in box with valve
Customized clothing bag