packaging film with biodegradable heat seal adhesive

Biodegradable heat seal adhesive reduces environmental impact

Micro plastics and plastic pollution in soil and marine environments has become a great concern for industries. As food packaging accounts for a great deal of this pollution, numerous innovative solutions have been developed in order to reduce plastic in the environment. One of such innovations is biodegradable heat seal adhesive for paper and biofilm. Biodegradable heat seal adhesive allows for compostable, plastic-free food and other packaging reducing environmental impact.

Paper and biofilm with biodegradable heat seal adhesive

The biodegradable hot seal adhesive is designed for paper and biofilm which are common materials in the packaging industry. Traditionally, heat seal adhesives can be either hot melts or liquids which are applied to the paper or film and let dry. The final bond is formed when the adhesive is reactivated by heat (and pressure), hence the name “heat seal”.

Heat seal adhesives are applied to flexible packaging, food packaging and paper converting. The biodegradable heat seal adhesive is suitable for most of these applications, and allows for modification to suit special purposes, various application methods and specific processes. Contact us for more information and find out whether biodegradable heat seal adhesive is the solution for your packaging.

Measuring compostability of adhesives according to EN 13432

Although biodegradable adhesives are rather new, there are already some standards that define compostability. One of these is the European Norm EN 13432. This standard evaluates four aspects of the adhesives: biodegradation, disintegration, ecotoxicity and heavy metals. Passing these four tests means the adhesive is biodegradable according to the standard as presented in the following table.

TestBiodegradable if…
Biodegradation 90% of the total mass of the adhesive is converted to CO2 within 180 days
Disintegration The germination rate and plant biomass in the compost are more than 90% of those in the corresponding blank compost
Ecotoxicity The products of adhesive composting process can be used to enrich soil or are not harmful to plant growth in the area
Heavy metals The product ́s heavy metals do not exceed the strict limits set in the standard

Benefits of compostable heat seal adhesives for packaging and paper

It goes without saying that the greatest benefit of compostable heat seal adhesive is its environmentally friendliness and plastic-free formulation. Nevertheless, the adhesive bring along also other benefits including:

  • No micro plastic pollution: as biodegradable heat seal adhesives break into CO2 and nutrients, no plastic pollution is produced during the process.
  • Recycling materials: the nutrients resulting from the biodegradation process can be used to enrich soil and promote farming activities. They can also lead to reduced use of landfill sites.
  • Compliance with national and international regulations: also regulations set for packaging have taken a more sustainable direction: for example the UK Plastic Pact states that all food packaging must be 100% reusable, recyclable or compostable by 2025.
  • Meeting consumer and brand owner needs: consumers and brand owners are ever-more conscious about the environment. Many aim at eliminating plastic pollution and replacing plastics with compostable materials and products.

Get in touch with a supplier of biodegradable packaging adhesives

Are you curious for biodegradable heat seal adhesive solutions that allow for compostable packaging? Do not hesitate to contact us for more information on the chemistry, specific products or specialized suppliers!


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