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:
Custom Laminated Printing Juice Bag Liquid Packaging Stand Up Plastic Water Spout Pouch
Shaped Pouches: The Ultimate Guide
Do you know the manufacturing process of high -temperature steaming bags?kraft paper pouch envelope
Popular recommendation
Wholesale Price Biodegradable Aluminum 3 Three Side Seal High Temperature Microwavable Food Retort S
Bag-In-Box
3L 5L Bag-In-Box Wine Dispenser Coffee/ Juice/ Water/ Oil Bag-In-Box With Valve
new super pouch
wine bag in box Manufacturing
spout pouch bags Processing
kraft spout pouch custom
bag in box packaging wholesale
bag in box packaging distributors
Flexible packaging film roll Factory
Tell you how to distinguish the material of the vacuum packaging bag
Main Analysis Report on the Current Situation of the Bag in Box Industry
What are the inspection standards for food packaging bags?
What are the advantages of liquid chemical packaging bags in transportation?
kraft paper pouch with zip lock.Analyze the safety issues of food packaging bags
What are the requirements for dried fruit packaging bags in food packaging bags.fruit and vegetables
Understand the wholesale prices of plastic packaging bags
Creative design of coffee bag
The convenience of coffee bags
What are the packaging machinery and equipment?
Explanation on Flexible Packaging.bags in a box
We all know but not necessarily comprehensive plastic packaging bag use knowledge.zip lock aluminum
smart food snack bags wholesaler.How to choose food packaging bags specifically
What are the advantages of octagonal sealed packaging bags.bag in box 3L,5L,10L
The scope of application of aluminum foil bags is wide
The types and characteristics of food packaging bags are super detailed!
Six Standards that Vacuum Packaging Bag Suppliers Should Adhere to.Vacuum zipper bag company
What is the bag in the BIB box
How to choose suitable plastic packaging bags.food packaging pouch suppliers
What to pay attention to when using vacuum packaging bags