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:
3L 5L Bag-In-Box Wine Dispenser Coffee/ Juice/ Water/ Oil Bag-In-Box With Valve
Plastic packaging bag manufacturers are here to talk to you about the precautions for using plastic
Popular recommendation
Custom Special Shaped Super Pouch Aluminum Foil 1.5L 3L 5L Stand Up Drink Juice Liquid Pouch With Va
Spout pouch
Custom Laminated Printing Juice Bag Liquid Packaging Stand Up Plastic Water Spout Pouch
spout pouch bags supplier
biodegradable spout pouches Vendor
refillable spout pouches price
Pouch with handle price
mulberry mini pouch with handle custom
spout pouch bag custom
Pouch with handle wholesale
How to correctly choose plastic bags for food?
What are the common bag types of food packaging bags
What are the composition of plastic bags?coffee packaging plastic bag wholesale
Liquid bags: making agricultural input packaging more efficient
juice bag in box Factory.Classification of liquid packaging bags
The common problems of self -standing bags are here, the solutions are here
The production process of sterile bags
Food design graphics analysis.
The vacuum packaging bag could not be sealed because of this
Common types of transparent vacuum packaging bags
What are the differences between raw materials of degradable packaging bags and fully degradable pac
Packaging products in aluminum foil bags gives you great face
The material characteristics of the food packaging bag you don't know.printed snack food bags sales
What are the material characteristics of composite packaging bags?
The value of vacuum PE bag in life
Talk about the advantages and applications of Spout Poubs
The origin of aluminum foil bags!aluminum foil bags for cooking manufacturer
Discussion on the Use of Fruit Juice Bags in Beverage Packaging.valve plastic coffee bag
The advantages and disadvantages of vacuum packaging bags using composite technology
What to pay attention to when designing food packaging bags.paper snack food bag distributors