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The principle and influence factors of air permeability of packaging materials

Gas transmittance. The amount of gas transmitted in 24 hours per square meter of transmitted area at one atmospheric pressure difference (standard conditions). Air permeability coefficient. The air permeability of the film per unit area and thickness per unit pressure difference per unit time (under standard conditions). The transmission of gas through thin film is …

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Flat bottom bag

The flat bottom bag is a kind of composite packaging bag, which is named according to its shape. It is also called eightside seal bag. As the name implies, it is a packaging bag with eight sealing edges, four edges at the bottom, and two edges on each side. It is a popular bag type in recent years, …

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Degradable materials and degradable packaging bags

The ubiquitous plastic products have facilitated people’s lives, but the resulting plastic waste has caused a lot of pollution to the ecological environment. White pollution caused by plastic products especially plastic bags is harming the natural environment and people’s normal lives step by step. In order to deal with “white pollution”, in addition to establishing environmental awareness …

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Degradable packaging bags

Reducing “white pollution” has long been a worldwide problem. Western Europe, the United States, Japan and other developed countries are banned the use of disposable plastic foam packaging. However, many countermeasures taken by various countries have some defects, but the appearance of biodegradable packaging bags breaks the original shackles. In order to promote green and environmentally friendly packaging, to …

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Analysis of the curling and wrinkling problem of composite packaging bags

In the actual production process of composite packaging bags, there are often faults due to mechanical reasons or other factors, such as: generation of bubbles, low compound fastness, curling, wrinkling, stretching or shrinking. The curling and wrinkling of composite packaging bags may seriously affect the production of customers and cause significant losses to customers. Today, the professional …

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Analysis of common materials for retort bags

The retort bag is made of multi-layer film materials, which are made into a certain size packaging bag by dry lamination or co-extrusion lamination.Its constituent materials are usually divided into 9 types. The retort bags made must be able to withstand high temperature sterilization, and its structural design should also meet the requirements of good heat sealability, heat resistance, water …

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