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:
Hot Sale BPA Free Plastic Drink Juice Fruit Liquid Packaging Stand Up Bag Spout Pouch
spout pouch machine manufacture
spout pouch packaging manufacture
Differences in the Materials of Composite Packaging Bags
The main core research content of the bag in box industry.bag in box sales
Popular recommendation
Eco Friendly Plastic Mylar Pouch Stand Up 50ml 100ml 200ml 250ml Custom Aluminum Spout Pouch
Flexible packaging film roll
PET food bag
spout pouch bag custom
clear spout pouch Factory
biodegradable clear mailing bags supplier
spout pouch packaging Processing
Spout pouch Factory
pouch with handle Manufacturing
mulberry mini pouch with handle sales
Bag-In-Box: Revolutionizing Liquid Packaging with Innovative Paper Bags
In what areas is the bag-in-box industry used?
Beverage Pouch: The Ultimate Guide
Ziplock bag manufacturers wholesale
History and Briefing of Ziplock Pouch
Introduction to Barcodes for Packaging Bags
If you don't know how to identify the vacuum packaging bag, come and see.vacuum zipper bags for clot
The vacuum packaging bag could not be sealed because of this
What is the quality of degradable plastic bags?
Application of Aluminum Foil Ton Bag.aluminum foil bag price
Independent Bag Industry Market.aluminum foil bags for cooking
The production process of plastic vest bag.bag in box packaging Manufacturing
Characteristics of food composite bags.plastic pouches for food packaging
Common Materials for Inflatable Packaging
Qualified composite bags should possess these qualities.aluminum laminated foil bag Factory
What is the appeal of the eight-side seal bag?
What are the requirements for the performance of sterile packaging bags?
aluminium coffee bag Processing.What should a good plastic packaging bag look like
What is OPP plastic bag and plastic handbag?
What are the reasons for the continuous rise in the BIB market.custom stand up pouch