How to deal with the changes of transparent plastic bags under long-term light or high temperature environment

Transparent plastic bags occupy an important position in the modern packaging industry. They are widely used in many fields such as food, medical care, logistics, etc., playing an indispensable role. However, under long-term exposure to light or high temperature, these plastic bags may undergo a series of physical and chemical changes, which may affect their performance and may pose a potential threat to the quality and safety of packaged items.

Material selection and optimization
Application of high-performance plastics
When dealing with the problem of performance degradation of transparent plastic bags, it is crucial to choose high-performance plastics that are resistant to high temperatures and light. Polyethylene terephthalate (PET) has gradually become an ideal material to replace traditional polyethylene (PE) and polypropylene (PP) due to its excellent heat resistance and light resistance. In addition, some modified nylon (PA) and polyvinyl chloride (PVC) also show excellent high temperature resistance and light resistance, which can meet more demanding application requirements.
Adding stabilizers and antioxidants
In order to improve the durability of plastic bags, adding appropriate amounts of stabilizers (such as light stabilizers, heat stabilizers) and antioxidants to their formulations is an effective strategy. These additives effectively delay the oxidative degradation and UV aging of plastics by capturing free radicals and inhibiting the occurrence of chain reactions, thereby ensuring the integrity and stability of plastic molecules.

Process Improvement and Technological Innovation
Blending and Modification Technology
The use of blending different types of plastics or adding functional fillers (such as nanoparticles, inorganic fibers, etc.) can significantly improve the heat resistance and light resistance of transparent plastic bags. These modification technologies optimize the molecular structure of plastics, enhance the thermal stability and light stability of materials, and enable them to maintain good performance in harsh environments.
Multi-layer co-extrusion technology
The application of multi-layer co-extrusion technology enables one or more layers of materials with specific functions to be added to a single-layer plastic bag. For example, introducing barrier materials into the inner layer of a transparent plastic bag can effectively prevent the penetration of external factors such as oxygen and moisture. At the same time, the selection of the outer layer material should also consider its high temperature resistance and light resistance to ensure the improvement of overall performance.

Design and Storage Optimization
Optimizing packaging design
Scientific and reasonable packaging design not only improves the practicality of transparent plastic bags, but also effectively reduces their performance changes under long-term light or high temperature environments. By increasing the thickness of the plastic bag, its high temperature resistance can be significantly improved; at the same time, changing the shape and size of the plastic bag can also effectively reduce its deformation risk under high temperature conditions.
Reasonable storage and use
In order to reduce the physical and chemical changes of transparent plastic bags, it is particularly important to avoid long-term exposure to high temperatures or strong sunlight. During storage and use, plastic bags should be kept in a cool and dry environment and avoid contact with sharp objects to prevent scratches or damage. In addition, choosing the right storage container and method can further extend the service life of transparent plastic bags and ensure their safety and reliability in various applications.