Top-line packagingTel: +86 188 2689 9458

Top-line packagingEmail: info@toplinepackaging.com

Top-line packaging
Top-line packaging
Top-line packaging
Top-line packaging Home  >  NEWS  >  Industry News

How to inspect the appearance of vacuum bag?

source:Industry News release time:2022-11-11 Hits:    

  Vacuum zipper bag

  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 printed food grade ziplock snack custom plastic pouch packaging food packing bag

spout pouch packaging bags Manufacturing

bag in box packaging Processing

What are the special properties of aluminum foil bags explained by the manufacturer of aluminum foil

The savior of the express delivery industry - buffer gas column bags.aluminium spout pouch sales

Popular recommendation

Wholesale High Barrier Plastic Stand Up Flat Bottom Pet Dog Food Packaging Bag

Smell Proof Stand Up Flat Bottom Pouch Coffee Bag /Coffee Beans Bag With Air Release Valve And Reusa

Super pouch

bag in box packaging maker

wine bag in box price

spout pouch packaging Manufacturing

pouch with handle manufacture

packaging spout pouch Production

spout pouches Vendor

pouch with handle price

Packaging has higher hygiene requirements for food bags.smart food snack bags distributors

Can the vacuum bag be reused?

Do you know all the things in the Bag-in-box?

With Spout pouch - a new form of packaging

How did the bag pattern come from?

If you don't know how to identify the vacuum packaging bag, come and see.vacuum zipper bags for clot

Kraft paper bags are easy to tear? It's just its material characteristics.kraft paper pouch bags man

The characteristics and application of composite packaging bag

Features and uses of textured vacuum bag

How to customize the packaging bag

Main bio based materials for degradable packaging bags

Modified atmosphere anti mildew packaging technology

Vacuum packaging bag characteristics.food vacuum bag

Precautions for PP packaging bag printing

The difference between boiling and cooking plastic bags is so big.Biodegradable Bubble mailing bag w

Why choose plastic vacuum bag for food packaging?

Composition of bags in BIB boxes.bag in box coffee

The necessity of using anti -fog packaging bags for vegetables.aluminium spout pouch Manufacturing

Why does the inner layer of aluminum foil bag use CPP instead of PE?

The packaging manufacturer tells you how to choose flexible packaging materials.reusable Snack food

Share:

Email

Wechat Whatsapp

Leave Your Message