Packaging is a critical aspect of product marketing and preservation. In the realm of powdered products, the choice of packaging material plays a crucial role. This article explores the various roles film plays in powder packaging — highlighting its importance, benefits, and critical factors to be considered for machine performance.

1. Protection and Preservation

Film provides a barrier against moisture, light, oxygen, and other contaminants, thereby preserving the freshness and integrity of the powdered product. This is especially important for powdered goods sensitive to moisture or oxidation.

2. Extended Shelf Life

By keeping out moisture and oxygen, pouch packaging helps maintain product quality and freshness for a longer period — reducing spoilage risk and increasing shelf appeal to consumers.

3. Product Visibility and Marketing

Pouch packaging offers excellent visibility for the product. Film packaging can be printed with vibrant designs and branding, helping to differentiate products on the shelf.

4. Convenience and Portability

Pouch packaging is lightweight, easy to transport and store, and easy for consumers to open and reseal.

5. Sustainability

Pouch packaging can be made from recyclable and biodegradable materials, reducing environmental impact and appealing to increasingly sustainability-conscious consumers.

Critical Machine Interface Factors

1. Hot Tack Curve

The hot tack curve describes how a packaging material behaves when subjected to heat during the sealing process. A well-defined hot tack curve is essential for ensuring proper sealing and preventing leaks. The film manufacturer specifies the pressure and temperature to be set for maximum seal strength, and the maximum temperature gradient the film can take.

2. Coefficient of Friction (COF)

The COF of a film material is crucial for determining its suitability for use on packaging machines. A low COF will require additional pressure to pull the film, causing pull belt wear. Vacuum pull belts are recommended if the film COF is low. These values must be discussed with the film supplier before any film change.

3. Eye Mark Colour

Eye marks indicate where a machine should perform a specific action such as cutting or sealing. The colour of the eye mark is important for machine vision systems to accurately detect and interpret the mark.

4. Sealing Layer Material and Thickness

The right combination of sealing layer material and thickness is essential to prevent leaks and maintain product freshness.

5. Monolayer vs. Laminate Packaging

Monolayer packaging is often more cost-effective, while laminate packaging offers enhanced barrier properties and strength. The choice depends on the specific requirements of the product.

6. Sustainable Films

Finding alternative films that meet shelf life and cost objectives is the primary focus for most organisations. It is imperative that existing equipment can run on the new film at current performance levels. Film selection and machine performance cannot be two individual silos. It is therefore important to involve the machine supplier at the beginning of the journey.