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:
stand up pouch coffee packaging wholesaler!How to order universal vacuum packaging bags?
Popular recommendation
PET food bag
Wholesale High Barrier Plastic Stand Up Flat Bottom Pet Dog Food Packaging Bag
Custom Special Shaped Super Pouch Aluminum Foil 1.5L 3L 5L Stand Up Drink Juice Liquid Pouch With Va
Spout pouch flexibility Production
biodegradable spout pouches Solution
biodegradable spout pouches custom
custom printed spout pouches
packaging spout pouch distributors
refillable spout pouches wholesaler
Spout pouch Production
With the widespread use of bags in boxes, their quality has been continuously recognized.bag in box
Efficient protection, easily carry: new choice of liquid packaging bag.juice bag in box company
Environmental protection of coffee bags
What are the characteristics of thin cream in a box?stand up pouch black
What are the special properties of aluminum foil bags explained by the manufacturer of aluminum foil
Snack food bag bulk wholesale.Learn about composite materials for food packaging bags
What are the differences between polyester pet vacuum bag and nylon pa vacuum bag
The role of the coffee bag
Development history of vacuum bag technology
Packaging bag printing type.recyclable spout pouches supplier
Packaging bag material
What benefits do liquid packaging bags bring to the purified water industry.bag in box maker
Why are more and more people using biodegradable plastic bags?
Tell you five specifications for inspecting plastic packaging bags.coffee packaging plastic bag
How much do you know about the processing of vacuum packed corn?
The characteristics and performance of Spout POUCHES
Manufacturer of octagonal sealed packaging bags
Decomposition time
Packaging bag decomposition process is not harmful substance.Flexible packaging film roll Factory
What are the environmental characteristics of degradable plastic bags