What is the difference between plastic wrap and stretch film? Why can't they be used interchangeably?

1. The Difference Between Cling Film and Stretch Wrap
Although cling film and stretch wrap appear similar, their materials, uses, and functions differ significantly.

Cling film is primarily used for food preservation. It offers excellent antioxidant, heat, and abrasion resistance, effectively protecting food from external factors and extending its shelf life. Stretch film, on the other hand, is primarily used for packaging, securing, and protecting items. It possesses a certain degree of stretchability and strength, allowing it to be tightly wrapped around the surface of items, sealing, protecting, and securing them, preventing damage or loss during transportation.

2. Reasons Why They Can't Be Used Interchangeably
Although cling film and stretch wrap are both plastic film products, their uses and functions are significantly different. Using one over the other will affect the product's performance and functionality.

First, if cling film is used instead of stretch wrap for packaging, because it lacks the strength and stretchability of stretch film, it won't wrap tightly around the item, causing the packaging to loosen, compromising the packaging and the safety of the items, especially during transportation. Secondly, plastic wrap lacks the waterproof, moisture-proof, and dust-proof properties of stretch wrap, so it cannot be used for long-term storage or moisture-proofing.

On the other hand, if stretch wrap is used instead of plastic wrap for food processing and preservation, due to its different material and chemical composition, it may release harmful substances, affecting food hygiene and safety. It also lacks the same preservation effect and cannot extend the shelf life of food.

III. Usage Recommendations
Thus, although plastic wrap and stretch wrap are both plastic film products, their applications vary significantly and they cannot be used interchangeably. When using, be sure to select the correct product, use it according to product specifications and instructions, and adhere to relevant hygiene and environmental standards. If you have any questions during use, consult a qualified professional.