Stretch film vs shrink film

In the world of packaging, stretch film and shrink film are two commonly used plastic materials — but they serve very different purposes. Understanding the differences between stretch film and shrink film is essential for choosing the right solution for product protection, transportation, and shelf display.

Stretch film, also known as stretch wrap, is a highly stretchable plastic film used to secure and bundle pallet loads. It clings tightly to the product when stretched, offering load stability and protection during storage and transport.

Shrink film, or shrink wrap, is a plastic film that shrinks tightly around a product when heat is applied. It is commonly used for retail packaging, product bundling, and tamper resistance.

1. Material & Composition

Stretch Film (Stretch Wrap):

Made from linear low-density polyethylene (LLDPE).

Highly elastic and can be stretched significantly (up to 100–300%) without breaking.

Typically clear, but can be tinted or colored.

Shrink Film (Shrink Wrap):

Made from materials like polyolefin, PVC, or polyethylene.

Not inherently stretchy; instead, it shrinks when exposed to heat.

Available in various thicknesses and can be clear or printed.

2. How They Work

Stretch Film:

Applied under tension around a load (e.g., pallets).

The elasticity of the film creates a tight wrap that holds items securely in place through cling and tension.

Does not require heat to activate.

Shrink Film:

Placed loosely over items and then heated using a heat gun, tunnel, or oven.

Upon heating, the film shrinks tightly around the product, conforming to its shape.

Creates a snug, tamper-evident seal.

3. Application Methods

Stretch Film:

Applied manually (hand wrap) or with stretch wrapping machines (semi-automatic or automatic).

Fast and efficient for palletizing.

Shrink Film:

Requires a sealing step (to close the film around the product) and then a heating step.

More complex and slower process than stretch wrapping.

4. Common Uses

Stretch Film:

Securing goods on pallets for shipping and storage.

Bundling multiple items together.

Protecting against dust and minor movement.

Shrink Film:

Individual product packaging (e.g., bottles, books, electronics).

Multi-pack bundling (e.g., 6-pack of soda).

Tamper-resistant and moisture-resistant packaging.

Retail-ready packaging with high clarity and printability.

Which One Should You Use?

Choose Stretch Film if you:

Need to secure large pallets or heavy items

Are shipping bulk loads

Don’t want to use heat equipment

Prioritize load containment over display

Choose Shrink Film if you:

Need tight, tamper-evident packaging

Want high transparency for retail presentation

Are packaging small or individual items

Can invest in a heat tunnel or gun

Environmental Considerations

Stretch film typically uses less material per unit load but may be harder to recycle due to additives.

Shrink film (especially polyolefin) is often recyclable and available in biodegradable or compostable options.

Both stretch film and shrink film are valuable packaging solutions, but their applications, equipment requirements, and functions differ significantly. Choosing the right film depends on whether you’re focused on transport protection (stretch film) or retail packaging and presentation (shrink film).