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About Inverform

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Let’s create a world with less plastic and reduced food waste. Made from pure wood fibres, Inverform creates new opportunities, ticking all the boxes for sustainability and product performance by providing optimal formability for food applications. Inverform can significantly reduce the climate impact of your packaging solutions compared to using fossil-based or aluminium alternatives.

Applications and benefits

Inverform is a Solid Bleached Board (SBB) with a natural feel that has been specifically designed for ready-made meal packaging such as pressed and deep-drawn trays. It can also be used to make cutlery and more.

The adaptable board offers excellent formability and high stiffness, with a grammage advantage. The material is taint and odour neutral, which is optimal for packaging fresh and food-safe meals. 

Inverform offers great visual appeal and can be coated, extruded or laminated.  A thin protective extrusion coating on the smooth surface makes the paperboard resistant to moisture, grease and heat. Inverform trays are suitable for microwave, freezer and oven use.

Sustainability advantages

Inverform trays have a substantially lower carbon footprint than regular plastic trays as Inverform is manufactured at the Holmen Iggesund Mill in Sweden from fresh wood fibres of known and traceable origin from sustainably managed forests.  The Iggesund mill holds chain-of-custody certification and has an extremely low climate impact due to its energy self-sufficiency. In 2021, the mill received the EcoVadis leadership award which recognises the Iggesund mill as a global leader in sustainability that belongs to the top 1 percent of all companies assessed by EcoVadis.

The trays themselves provide all the advantages of plastic but are a more sustainable alternative with a lower carbon footprint. They conform well to existing packaging collection systems and offer better recyclability than fossil-based materials.

Technical details

Inverform is an uncoated, multiply Solid Bleached Board made from chemical pulp. The board can be formed into trays of different shapes due to its combination of strength and flexibility. 

The fibre composition varies for each layer in the construction of Inverform. The fibres are selected based on shape and length and are treated differently to tailor the paperboard construction for its intended use.

Inverform is available with several different barrier coatings – Polyethylene terephthalate (PET), Polyethylene (PE), and Bio E, a barrier that is approved for industrial composting.  Inverform trays comply with FDA and other food hygiene packaging regulations. 

Creasing recommendations

creasing_recommendations_inverform

Please observe that these are general recommendations and adjustments might be necessary in each case.

Height of cutting rule, H=23.8 mm Groove depth, tf = tn – 0.1 mm
      Creasing rule
Paperboard Thickness (µm) Groove width, bn (mm) Matrix thickness1), tn (mm) Height, Hr (mm) Thickness, br (mm)
205 0,9 0,5 23.4 0,70
235 1,0 0,5 23.4 0,70
270 1,0 0,5 23.4 0,70
300 1,0 0,5 23,3 0,70
330 1,1 0,5 23,3 0,70
360 1,2 0,6 23,2 0,70
395 1,2 0,6 23,2 0,70
435 1,3 0,6 23,2 0,70
465 1,3 0,6 23,2 0,70
505 1,4 0,7 23,1 0,70
  1) Matrix (Pertinax)

Online version

Access the online version of this spec sheet on:
iggesund.com/about-inverform

Inverform products

Inverform

Inverform is an uncoated substrate specially developed for ready-made food packaging, that complies with food hygiene regulations.

Discover Inverform

Inverform + Bio E

Inverform with a Bio E coating offers an environmentally friendly option for pressed and folded food trays.

Discover Inverform + Bio E

Inverform + PET

Inverform with PET coating is designed for pressed and folded trays that hold chilled and frozen food.

Discover Inverform + PET

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Holmen Iggesund is the premium paperboard company for purposeful solutions. We invite our customers and partners to be part of creating the next generation of sustainable packaging solutions and graphical applications together with us.

We are part of the Holmen Group, relying on our own sustainably managed forests to ensure a renewable material for centuries to come.

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Holmen Iggesund
825 80 Iggesund, Sweden

+46 650 - 280 00
Find contact on iggesund.com/contacts

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