What key roles does the PET layer of the stand up pouch play in packaging?
Publish Time: 2025-03-25
As a soft packaging with a horizontal support structure at the bottom, the stand up pouch can stand on its own without relying on any fulcrum, which provides great convenience for the display and carrying of goods. In the material composition of the stand up pouch, the PET layer plays a vital role as a key link. PET, or polyester, is a high-performance thermoplastic that has been widely used in the packaging field due to its excellent physical and chemical properties.
The main role of the PET layer in the stand up pouch is to provide structural strength and transparency. PET material has high mechanical strength, which means that it can be used in thinner cases while still providing good protection. This is crucial for the stand up pouch, because the stand up pouch needs to have a certain stiffness in order to stand on its own and display goods, and also needs to have enough strength to withstand the weight of the goods and the impact and extrusion during transportation. The PET layer gives the stand up pouch the necessary strength and stiffness, allowing it to maintain a good shape and stability.
In addition, the PET layer also has good transparency. Its light transmittance is above 90%, which can clearly display the goods in the package, which is of great significance for attracting consumers and enhancing the value of goods. In retail places such as supermarkets and convenience stores, consumers often judge the quality and freshness of goods by packaging, and the high transparency of the PET layer allows the goods to be seen at a glance, enhancing the attractiveness of the goods and helping to promote sales.
In addition to strength and transparency, the PET layer also has certain barrier properties. It can effectively prevent the penetration of gases such as oxygen and water vapor, thereby extending the shelf life of food. This is especially important for foods that need to be stored for a long time, because the presence of oxygen will accelerate the oxidation process of food and cause food deterioration. The barrier properties of the PET layer provide a relatively closed environment for food, slow down the oxidation rate of food, and maintain the freshness and nutritional value of food.
In addition, PET material also has good heat resistance and cold resistance, and can maintain stable performance over a wide temperature range. This allows the stand up pouch to be used in various environmental conditions, whether it is hot summer or cold winter, it can maintain good shape and performance.
It is worth mentioning that PET material is also an environmentally friendly material that can be recycled and reused, meeting the requirements of sustainable development. Today, as environmental awareness grows, the stand up pouch made of PET material not only meets the packaging needs of goods, but also reflects the company's commitment and responsibility to environmental protection.
In summary, the stand up pouch PET layer plays multiple key roles in packaging, including providing structural strength, transparency, barrier properties, and heat and cold resistance, providing strong support for the display, protection and sales of goods.
