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:

China Factory Baby Complementary Food Spout Pouch Baby Food Fruit Puree Bag With Spout Packaging Bag

spout pouches wholesale

bag in box packaging custom

Will liquor vacuum bags affect the wine?

The structure of Spout POUCHES

Popular recommendation

Bag-In-Box

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

Coffee & Tea pouch

bag in box manufacture

wine bag in box manufacture

spout pouch bags company

spout pouch black wholesale

juice bag in box price

Flexible packaging film roll direct sales

stand up spout pouch

The thickness of the food packaging bag is related to food safety.reusable Snack food bag Manufactur

What are the types of packaging bags

Differences in the Materials of Composite Packaging Bags

baby pacifier newborn wholesale.What are the good properties of food packaging bags

Is it normal for frozen food packaging bags to bulge?

What is the material of PE bag and what type of packaging bag can be made

What are the characteristics of thin cream in a box?stand up pouch black

What are the advantages of octagonal sealed packaging bags

coffee bag with one way valve distributors.The thickness of each layer of the composite packaging ba

What is biodegradable packaging material and how to identify it?

Supply and demand analysis of self-supporting bag industry

There are some tips for identifying the material of plastic bags

Do you need to pay attention to the shelf life of food packaging bags?pint zipper vacuum bag manufac

Powder packaging bag.Pouch with handle wholesale

Summarize the application knowledge of plastic packaging bags.smart food Snack food bag company

The reason why the packaging bag is easy to tear open.aluminum foil bag large Production

How to detect electrostatic bags?

Cooking bag food packaging mainstream products

Why choose aluminum foil bags for mask packaging bags

Main bio based materials for degradable packaging bags

Share:

Email

Wechat Whatsapp

Leave Your Message