Shrink film and stretch film are both commonly used packaging materials, they have good sealing, moisture resistance and dust resistance, and can effectively protect products from damage during transportation and storage. However, many people have questions about the expiration dates of these two types of film, especially during long periods of storage or use. In this article, we will answer this question and help you better understand the shelf life situation of shrink and stretch films.
First, let’s take a look at the materials and manufacturing process of shrink and stretch films.
Shrink film is usually made of materials such as polyvinyl chloride (PVC) or polypropylene (PP), which is wrapped around the surface of the product by heating and shrinking. Stretch film, on the other hand, is made primarily from linear low density polyethylene (LLDPE), which is stretched to form a film to cover the product. All of these materials have good sealing and protective properties, which can effectively extend the shelf life of the product.
For the shelf life of shrink and stretch films, generally speaking, they do not have a clear expiration date limit. However, their shelf life is affected by storage conditions, environmental factors and the way they are used.
The expiration date of shrink film and stretch film will be affected by the following factors
Material: The expiration date of shrink film and stretch film will be different depending on the material. For example, PE shrink film is generally valid for one year, while PVC shrink film is generally valid for two years.
Production process: shrink film and stretch film production processes are different, their validity will be different. For example, the use of blow molding process production of shrink film, its validity is generally shorter than the use of extrusion process production of shrink film.
Storage conditions: Shrink film and stretch film storage conditions are different, its validity will also be different. For example, shrink film and stretch film should be stored in a cool and dry place, avoiding direct sunlight and high temperature and humidity environments.
How to tell if shrink film and stretch film are expired?
You can tell if a shrink film or stretch film has expired by the following methods:
Appearance: Expired shrink and stretch film will be discolored, brittle and aged.
Performance: Expired shrink and stretch film will have poor sealing, moisture resistance, dust resistance, etc.
How to extend the service life of shrink film and stretch film?
You can extend the service life of shrink film and stretch film by the following methods:
Choose the right material: When choosing shrink film and stretch film, you should choose the right material according to the environment and conditions of use.
Pay attention to the production process: When choosing shrink film and stretch film, attention should be paid to the production process.
Correct storage: Shrink film and stretch film should be stored in a cool and dry place, avoid direct sunlight and high temperature and humid environment.
Conclusion
Shrink film and stretch film is a good choice. Shrink film and stretch film have an expiration date, the use of the expiration date can effectively protect the product. You can judge whether the shrink film and stretch film have expired by their appearance and performance. The service life of shrink film and stretch film can be prolonged by choosing the right material, paying attention to the production process and proper storage.
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