In the development of modern materials science, PETG (polyethylene terephthalate copolymer) film has received great attention from the market due to its excellent performance and wide application. However, for many users and companies, the service life of the material and its stability after long-term use are also key concerns.

This article will discuss in detail the service life of PETG film and whether it will oxidize and discolor after long-term use, to help readers better understand and apply this material.

How many years is the service life of PETG film?

PETG film is a thermoplastic material with excellent performance. Its service life is affected by many factors, including the characteristics of the material itself, the use environment, the application scenario, and maintenance.

1. Material properties:

PETG film has the characteristics of high transparency, excellent toughness and impact resistance, good processing performance, and low-temperature heat sealing. These characteristics enable PET G film to maintain its performance stability for a long time in many applications. Generally speaking, under normal use and good maintenance, the service life of PETG film can reach 5 to 10 years or even longer.

2. Use environment:

The use environment of PETG film has an important impact on its service life. In indoor environments, PETG film can usually maintain a long service life because it is not affected by ultraviolet rays, extreme temperatures and humidity changes. However, in outdoor environments, PETG film may be affected by sunlight, wind and rain, and temperature changes, and its service life may be shortened. Therefore, in outdoor applications, PETG film usually needs to be treated with UV protection to extend its service life.

3. Application scenarios:

Different application scenarios also have different requirements for the service life of PETG film. For example, in packaging applications, PETG film usually only needs to be used for a few months to one or two years, while in long-term applications such as construction and advertising signs, the service life of PETG film is required to be longer. Therefore, according to the specific application scenario, PETG film with appropriate thickness and treatment process can be selected to meet the service life requirements.

4. Maintenance:

Good maintenance and care can significantly extend the service life of PETG film. For example, regular cleaning of the surface of PETG film, avoiding the use of detergents containing strong acids or strong alkalis, and avoiding physical damage and scratches can all help maintain the performance and appearance of PETG film and extend its service life.

Will PETG film oxidize and discolor over time?

The oxidation and discoloration of materials are important factors affecting their service life and appearance. For PETG film, the problem of oxidation discoloration is also the focus of many users.

1. Oxidation problem:

When PET G film is exposed to air for a long time, a certain degree of oxidation reaction may occur. This is mainly because the combined effect of oxygen, ultraviolet rays and other environmental factors in the air causes the chemical bonds in the PETG molecular structure to break or recombine, which in turn causes changes in material properties. However, compared with some other plastic materials, PETG film has better antioxidant properties and its oxidation rate is slower. In indoor environments, the oxidation problem of PETG film is usually not obvious, while in outdoor environments, especially under direct sunlight and high temperature and humidity conditions, the oxidation rate of PETG film may accelerate.

2. Discoloration problem:

The discoloration of PETG film is mainly caused by ultraviolet radiation and oxidation reaction. Under long-term ultraviolet radiation, some molecular structures in PETG film may undergo photochemical reactions, causing the material to turn yellow or discolor. This phenomenon is more common in outdoor applications. For example, PETG films used in outdoor billboards, building decoration materials, etc., may change color after a few years of use if they are not treated with UV protection.

3. Protective measures:

In order to delay the oxidation and discoloration of PET G films, the following protective measures can usually be taken:

    ● UV protection coating: Applying a layer of UV protection coating on the surface of PETG film can effectively block UV radiation, reduce the occurrence of photochemical reactions, and delay material discoloration.

    ● Adding antioxidants: Adding an appropriate amount of antioxidants to PETG resin can improve the antioxidant properties of the material and delay the occurrence of oxidation reactions.

    ● Regular cleaning and maintenance: Regularly cleaning the surface of PETG film to avoid dust and dirt accumulation can reduce the occurrence of oxidation reactions and maintain the transparency and appearance of the material.

    ● Storage away from light: When PETG film is not in use, try to store it in a cool and dark environment to reduce UV exposure and extend the service life of the material.

Conclusion

In summary, as a multifunctional and high-performance material, PETG film has shown strong vitality in various industries with its superior properties and wide application. Although PET G film may have oxidation and discoloration problems after long-term use, these problems can be effectively controlled and alleviated through reasonable protective measures.

In the future, through continuous improvement of production processes and material formulations, the performance of PETG film will be further improved, and the application field will continue to expand, providing important support for the development and progress of various industries.