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
Several common coffee bag materials
Current Situation and Prospects of the Global Packaging Machinery Market.vacuum sealer bags for food
Popular recommendation
Custom Print Side Gusset Coffee Pouch Black Matte Coffee Beans Packaging With Valve
PET food bag
Coffee & Tea pouch
coffee grinds pouches manufacture
packaging spout pouch custom
pet food bag clip supplier
pouch flexible packaging custom
new super pouch Processing
Pouch with handle price
spout pouches price
bag for food packaging.What are the application scope of composite packaging bags
Environmental protection of coffee bags
Is the food vacuum packaging bag resistant to high temperature?
Several common coffee bag materials
What are the differences between polyester pet vacuum bag and nylon pa vacuum bag
The use of aluminum foil bags
Flexible Packaging: The Smart Future of Bag-in-Box Solutions
Hitting the pain points of gift box packaging directly, three simple points make packaging customiza
Food vacuum packaging bag: a very convenient packaging method
flexible packaging film structure wholesale.Real time strategy for packaging bags
Differentiation between vacuum packaging bag manufacturers and industries
Packaging bag manufacturer introduces production details of Vacuum packing bags
How to remove static electricity from packaging bags?
bag in box packaging manufacture.Vacuum packaging bags that you don't pay attention to
What should I pay attention to when using food packaging bag composite in winter.smart food Snack fo
Do you know the manufacturing process of high -temperature steaming bags?kraft paper pouch envelope
Causes and solutions for the difficulty of aluminum foil bags.aluminum foil bags for grilling
What foods require aluminum foil packaging bags for food?Aluminum foil standing spout pouch bag
Antique advertising bag.Aluminum foil bag maker
properties of flexible packaging films Manufacturing.What factors will affect the quality of plastic