As a widely used packaging material, PET-coated film bags possess numerous unique advantages that make them stand out among various packaging options.
PET-coated film bags have excellent barrier properties. In terms of gas barriers, they can effectively prevent the penetration of oxygen, carbon dioxide and other gases. This characteristic is of vital importance in the food industry. For example, when used to package potato chips, nuts and other oil-rich foods, it can prevent oxygen from entering the bags, and avoid the oxidation of fats in the foods and the resulting off-flavors, thus extending the shelf life of the foods. Meanwhile, for products that need to maintain carbon dioxide gas, such as some pastries in inflatable packaging, PET-coated film bags can ensure that carbon dioxide will not leak and maintain the soft texture of the pastries. In terms of water vapor barrier performance, PET-coated film bags also perform outstandingly. They can prevent external water vapor from entering the bags and protect products from the influence of humid environments. Take electronic products for example. Mobile phones, cameras and other electronic devices are very sensitive to humidity. PET-coated film bags can provide a dry environment for them and prevent water vapor from eroding electronic components and reducing the risk of equipment damage.
They have excellent physical properties. PET-coated film bags have relatively high strength, including good tensile strength and tear resistance. This means that they will not break easily when subjected to certain external forces. During transportation and handling, even if the bags are squeezed or stretched, they can remain intact and effectively protect the internal products. For example, in logistics transportation, PET-coated film bags filled with various commodities can withstand the pressure of stacking and collisions and ensure that the commodities arrive at their destinations safely. Meanwhile, PET-coated film bags also have good flexibility and can be bent and folded as needed, which is convenient for storage and use. This flexibility enables them to fit the shape of products well. Whether packaging regular or irregular products, they can provide appropriate packaging solutions.
PET-coated film bags have good chemical resistance. They can withstand the erosion of a variety of chemical substances and have a certain resistance to common acids, alkalis and other chemical substances. This enables them to be widely used in the packaging of chemical products. For example, for some daily necessities containing weakly acidic or weakly alkaline components, such as shampoos and body washes, PET-coated film bags can prevent these chemical substances from reacting with the external environment and ensure the quality and stability of the products.
In terms of thermal stability, PET-coated film bags have an outstanding performance. They can maintain stable performance within a relatively wide temperature range. In a high-temperature environment, they will not deform or melt, which makes them suitable for the packaging of some products that require high-temperature treatment, such as food that has undergone high-temperature sterilization. In a low-temperature environment, PET-coated film bags will not become brittle and can protect products under cold conditions. For example, in the packaging of frozen foods, they can withstand the low-temperature environment, prevent the bags from breaking and protect the integrity of the foods.
From the perspective of printability, the surface of PET-coated film bags is smooth and flat, which provides a good foundation for printing. They can present high-quality printing effects. Whether it is bright colors or fine patterns, they can be clearly printed on the bags. This is very important for product packaging design, because beautiful packaging can attract consumers’ attention and improve the market competitiveness of products. For example, when packaging high-end cosmetics, gifts and other products, the exquisite printing patterns on PET-coated film bags can enhance the grade of the products.
In addition, PET-coated film bags also have certain environmental advantages. PET materials themselves are recyclable, which meets the requirements of modern society for environmental protection. After the products are used, PET-coated film bags can be recycled and reprocessed into new PET products, reducing environmental pollution.
With their strong barrier properties, excellent physical properties, good chemical resistance, high thermal stability, good printability, and environmental advantages, PET-coated film bags play an important role in the packaging of food, electronic products, chemical products, and many other products, providing reliable protection and good display effects.