PET

PET

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Plastic Coatings

To attain specific properties, paperboard is coated with plastic to combine the mechanical properties of the paperboard with the barrier and sealing properties of plastic or foil and film. Molten plastic is applied using an extrusion process to paperboard as a thin, smooth layer of uniform thickness. The choice of material is determined by the desired properties.

Product description

Plastic coatings are used on paperboard to protect against liquids and to provide a barrier against moisture. Paperboard with polyethylene terephthalate (PET) coating is extremely temperature resistant and provides good sealability and an excellent oxygen and fat barrier. This makes it highly suitable for applications such as  microwave and conventional oven trays for the cooking or reheating of food, so called dual-ovenable trays. All PET coated paperboard can be used for applications up to 220°C, depending on the degree of fill. PET is also used to coat paperboard in applications such as tray lids. PET is offered primarily together with our Inverform range, as well as selected grades from our Invercote product range. Black, white and transparent-pigmented versions of PET coatings are available upon request.

End use

The specific properties of the product allow it to be used in the following areas.

Holmen Iggesund end use microwaving

Microwaving

Holmen Iggesund end use oven cooking

Oven cooking

Holmen Iggesund end use deep freezing

Deep freezing

Holmen Iggesund end use vapour

Vapour

Holmen Iggesund end use oxygen

Oxygen

Holmen Iggesund end use heat sealing

Heat sealing

Invercote/Inverform
Certifications & Standards

Product related

PEFC
credit
material

FSC® Mix

Food safety

Archiving

Toy safety

2778 PEFC

TUEV-COC-000232

EC 1935/2004

EC 2023/2006

FDA 21 CFR

German BfR XXXVI

Acid free

EN 71 Part 3

EN 71 Part 9
All fibres from sustainable and controlled sources in compliance with the EU Timber Regulation EC 995/2010.
EcoVadis Platinum Medal awarded in 2024 (top 1% of all companies assessed).
 

Mill related

ISO 9001

ISO 14001

ISO 45001

ISO 50001

FSC®

FSSC 22000

For more detailed information about our certificates, visit iggesund.com/certificates.

PET Properties

Tolerances Tolerances Methods/Remarks
Added grammage (g/m²) 30 +/- 7% 40 +/- 5% ISO 536
Added thickness (µm) 22 +/- 7% 29 +/- 5% Calculated value
Surface smoothness (µm) ≤2.7 - ≤2.7 - ISO 8791
Adhesion 5 ≥ 4 6 ≥ 5 Internal
Pin holes (no/m²) 0 ≤ 4 0 ≤ 4 PTN 8-70 (modified)

Regarding adhesion, the scale is 1–6. (6 = the best possible adhesion on the concerned surface).

Holmen recommends a maximum 1 (one) year time limit, from delivery, for board in storage.

For paperboard with barriers or foil lamination the recommended storage time is no longer than 6 (six) months due to declining effect of any surface treatments.

The above recommendations are only valid if the product is stored in its original wrapping.

Online version

Access the online version of this spec sheet on: iggesund.com/pet

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