Chemical recycling: depolymerisation of PET waste streams into virgin-quality monomers.

matterr GmbH

BraunschweigNew on Amplifa

HRB 210732, Amtsgericht BraunschweigCommercial register

GmbHLegal form

BraunschweigLocation

up to 20 %Permissible non-PET content in the input stream

About matterr

matterr GmbH develops and operates a depolymerisation technology for the chemical recycling of PET. Complex, mixed PET waste streams – including polyester textile blends and multilayer packaging – are broken down into their molecular building blocks and regenerated into virgin-quality monomers. These monomers are a drop-in solution: chemically identical to virgin material and integrable into existing PET production facilities without any adjustment to processes or infrastructure. The continuous process runs at moderate temperatures with high selectivity and processes input streams with up to 20 % non-PET content. Target groups are waste management companies, PET manufacturers and the textile industry. The company is based in Braunschweig, Lower Saxony.

Site: Braunschweig
Processes: Depolymerisation of PET (chemical recycling of PET/polyester waste into monomers), Depolymerisation technology for PET waste (textiles, composite packaging), Preparation of PET-rich waste streams with up to 20 % non-PET content, Supply of virgin-quality monomers (drop-in) for PET manufacturers
Materials: PET (polyethylene terephthalate), Polyester fibres/textile blends, Multilayer packaging, Depolymerisation
Certificates: Drop-in monomers in virgin quality
Industries: Recycling/Circular economy, PET production, Packaging industry, Textile industry, Waste management

01
Acceptance of PET-rich waste streams (packaging, textiles)
02
Preparation of the input streams
03
Depolymerisation into monomers
04
Purification/quality assurance
05
Delivery of drop-in monomers to PET manufacturers

Materials & Processes

PET

PET (polyethylene terephthalate)

Main input and target material; depolymerisation into virgin-quality monomers.

PET-Textil

Polyester fibres/textile blends

Mixed textile waste with up to 20 % non-PET content is processed as input stream.

ML-Verbund

Multilayer packaging

Complex composite packaging that cannot be mechanically recycled serves as feedstock.

Depoly

Depolymerisation

Continuous chemical process that breaks down PET into monomers within seconds at moderate temperatures with high selectivity.

Locations

Braunschweig

Headquarters

Materials: PET, polyester textile blends, multilayer packaging

Applications

**Recycled PET monomers**Depolymerisation · PET production

**Recycled granulate/feedstock**Chemical recycling · Circular economy

**Polyester textiles**Depolymerisation · Textile industry

**Monomer powder (laboratory)**Quality testing · Process development

Inside the production

Circular process of PET recycling (infographic)

Industries

Recycling/Circular economyPET productionPackaging industryTextile industryWaste management

Processes & technical limits

Processes	Tolerance	Max. part	Weight	Lot size	Materials
Depolymerisation of PET (chemical recycling of PET/polyester waste into monomers)Other (chemical recycling)	–	–	–	–	PET, Polyester (incl. textile blends with up to 20 %), Multilayer packaging

Additional services

Depolymerisation technology for PET waste (textiles, composite packaging)Preparation of PET-rich waste streams with up to 20 % non-PET contentSupply of virgin-quality monomers (drop-in) for PET manufacturers

Quality

The monomers are supplied in virgin quality and are chemically identical to virgin material; the process is operated continuously with high selectivity and high purity.

Evidence	Braunschweig
Drop-in monomers in virgin quality

History

2026
Funding for the ReNaTe R&D project approved by ERDF and the State of Lower Saxony.
2026
Contribution to the System Design Report on extended producer responsibility (EPR) for textiles, coordinated by Circular Republic.