Packaging bag source factory takes you to know three-side sealed bag and center sealed bag
Release time:2019-11-19
Plastic packaging bags come in a variety of styles, but can also be simplified. Three-side sealed bags seal three sides of the bag, and items are inserted from the top or bottom seal, while center-sealed bags seal the plastic packaging in the middle. Below, Shunxingyuan Packaging, a professional flexible packaging manufacturer, will detail the differences between center-sealed bags and three-side sealed bags.
Plastic packaging bags come in various styles, but they can be simplified. A three-side sealed bag seals three sides of the bag, and items are inserted from the top or bottom opening. A center-sealed bag seals the plastic packaging in the middle. Shunxingyuan Packaging, a professional flexible packaging manufacturer, will now detail the differences between center-sealed and three-side sealed bags.
1. Center-Sealed Bags
Center-sealed bags, also known as back-sealed bags, have a wide range of applications. They are commonly used for face masks, cosmetics, tissues, toys, and food.
The packaging of rice, melon seeds, and tea leaves is becoming increasingly diverse. Many food packaging bags for rice, melon seeds, and tea leaves are getting smaller, and the materials used are also more varied. Center-sealed packaging is a common form of packaging.
2. Three-Side Sealed Bags
Three-side sealed bags offer the best airtightness; vacuum bags generally use this bag-making method.
Three-side sealed bags often require vacuum packaging. The reasons for this are diverse; sometimes it's to prevent food spoilage, and other times it's to extend shelf life. Vacuum packaging, also known as reduced-pressure packaging, involves removing all air from the bag before sealing, keeping the bag under constant low pressure.
Furthermore, three-side sealed packaging boasts low material consumption, excellent sealing performance, high barrier properties, low oxygen and moisture permeability, protection against moisture, dirt, radiation, and decay, strong mechanical properties, a bright and practical appearance, and is non-toxic and odorless, meeting national standards.
Center-sealed and three-side sealed bags are produced using different equipment. Due to the differences in production steps, their uses also differ.
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