Films

What are films?

Films are thin, flexible layers made from plastics such as polyethylene, polypropylene or PET, as well as from metal or paper composites. They are used as packaging materials, carrier films, protective layers or for technical applications, offering flexibility, tightness and the option to add barrier properties, printability or surface finishing. Modern films can provide specialised features such as UV protection, antistatic performance, heat resistance or even electrical conductivity.

Films can be refined in many ways – for example through printing, coating, laminating, embossing or the application of adhesive layers to enhance their functionality or appearance.

What types of films exist – and how do they differ?

The term film covers a wide range of materials, properties and applications. Depending on structure and function, films can be classified into categories such as:

• Technical films – for industrial, functional or electronic applications
• Packaging films – for food, medical products, cosmetics and logistics
• Decorative films – for surface design, interior construction or advertising
• Barrier films – with protective layers against moisture, gases or UV
• Carrier films – for labels, adhesive systems or coatings
• Composite films – constructed from multiple layers for combined properties

Technical films are characterised by specific requirements regarding temperature resistance, mechanical stability, chemical resistance or electrical performance. They are used in batteries, displays, insulation systems, filters or membranes.

Paper or paper–non-woven composites can now be coated in such a way that they compete with, or deliberately replace, conventional plastic films in terms of appearance and function.

How are films manufactured – and how can they be functionally refined?

Films are usually produced through extrusion, blown‑film processes, casting (cast film) or calendering. For plastic films, the raw material – such as polypropylene or PET – is melted and then formed into a flat sheet. Metallic films like aluminium are typically produced through rolling until the desired thickness is achieved.

In many cases, films undergo refinement afterwards to tailor them to specific applications. Common methods include:

• Laminating (forming composites with paper, non‑woven or aluminium)
• Coating (e.g. with barrier layers or adhesive systems)
• Printing (offset, flexographic or digital printing)
• Embossing (for tactile or visual effects)
• Siliconising (for release liners)

In technical applications, such refinement steps are essential to align the film with its intended use – for example as a label carrier, membrane, protective layer or packaging component with barrier functionality.

Modern finishing technologies allow highly precise layer structures that achieve maximum performance with minimal material usage – functional, efficient and sustainable.

Film expertise at LAHNPAPER – alternative materials with functional added value

LAHNPAPER offers speciality papers and non-wovens that serve as alternatives or complements to conventional films in many applications. These materials combine the advantages of paper – such as natural tactile quality and printability – with functional properties typically associated with films.

These include:

• Moisture and chemical resistance
• Surface finishing (e.g. coatings, embossing)
• High tear strength and dimensional stability

This combination makes LAHNPAPER products attractive for use in labels, tickets, graphic applications or technical fields where traditional plastic films may be too inflexible, too delicate or environmentally disadvantageous.

With lahnit®, LAHNPAPER also offers a high‑quality polypropylene film that is particularly durable, scratch‑resistant and weatherproof. It is suitable for applications requiring both mechanical stability and surface finishing – such as graphics, documents, answer sheets, labels or as a laminatable carrier.

In combination with LAHNPAPER’s speciality papers, this results in customised material solutions that are not only functional but also more sustainable than conventional films.

Conclusion: versatile materials for the future

Whether used as a protective layer, functional component or design element, films play a central role in modern industry. Their material diversity, refinement options and technical properties make them indispensable across many applications.

At the same time, demand is rising for sustainable alternatives to traditional plastic films – for example in the form of functional speciality papers or paper‑film composites. Technical films and their paper‑based counterparts will increasingly ensure that functionality, aesthetics and environmental responsibility are no longer contradictions.

LAHNPAPER provides solutions at the interface between paper and film – with products tailored to application requirements, delivering strong performance in both industrial and graphic environments.