G-PET (glycol-modified PET, also known as PETG) from Krumbeck combines extreme toughness with sealability — ideal for medical sterile packaging with Tyvek sealing and as an outer layer in GAG/GRG coextrusions. Manufactured in Sundern (Sauerland), Germany.
G-PET (glycol-modified PET) is PET with a glycol modification that makes the material significantly tougher, more flexible and sealable. Unlike standard PET, G-PET does not crystallise during thermoforming — it remains amorphous and crystal clear. This property is crucial for transparent packaging where the product needs to remain visible.
The key property of G-PET is its sealability. G-PET can be reliably sealed with Tyvek (DuPont), films and other G-PET surfaces. This makes it the material of choice for medical sterile packaging. Since G-PET as a full material is significantly more expensive than standard PET, it is commonly used in practice as a thin outer layer in GAG/GRG coextrusions — providing HF sealability at a fraction of the cost.
With a density of 1.27 g/cm³ and a forming temperature of 110–150 °C, G-PET sits below the processing window of standard PET — meaning faster cycle times and lower energy consumption. Extreme toughness: G-PET does not break or shatter, even at low temperatures or under drop impact.
Typical applications: medical sterile packaging (Tyvek sealing), pharmaceutical blister packaging, high-quality product protection packaging and as an outer layer in HF-sealable GAG/GRG films. Learn more on our page about medical blister packaging.
Tyvek, film and G-PET-to-G-PET sealing possible — the foundation for sterile medical packaging and tamper-proof blisters.
No shattering, no breaking — even in cold conditions. G-PET offers maximum impact resistance and shatterproof protection for sensitive products.
Remains amorphous, no crystallisation after forming — perfect transparency for product presentation and visual inspection.
| Property | Value |
|---|---|
| Chemical Name | Glycol-modified Polyethylene Terephthalate |
| Abbreviation | G-PET / PETG |
| Density | 1.27 g/cm³ |
| Forming Temperature | 110–150 °C |
| Sealable | Yes (Tyvek, film, G-PET) |
| Transparency | Crystal clear (amorphous) |
| Impact Resistance | Very high |
| Supplier | Krumbeck |
| Use in Coextrusion | Outer layer in GAG / GRG |
Need a sealable, extremely tough thermoforming film? We provide personal advice on the optimal G-PET solution — from material selection to series production in Sundern.
+49 (0) 2935 6099956Standard PET (A-PET) — crystal clear, dimensionally stable and recyclable. The basis for transparent blister packaging.
View PET DetailsCoextrusion with G-PET outer layer — HF-weldable, tamper-proof and extremely dimensionally stable.
View GAG/GRG DetailsImpact-resistant and temperature-resistant — the workhorse for technical trays and automotive packaging.
View ABS DetailsClamshell packaging, seal blisters, blister hoods — custom manufactured, directly from the producer in Sundern.
View All BlistersMedical blister packaging made from PETG and G-PET — documented, manufactured under controlled conditions, Tyvek sealing.
View Medical BlistersDescribe your requirements — we will personally advise you on the right G-PET solution for your application.
We will get back to you within 24 hours.