Manufacturer of technical adhesive tapes, cables, wires and wiring harnesses with injection-moulded components
Coroplast Fritz Müller GmbH & Co. KG
Wuppertal · Schönebeck · Großmehring · Wolfsburg · Stuttgart · Strzelce Opolskie · Dylaki · Kunshan · Mianyang · Hammamet · Enfidha · Rock Hill · Acámbaro · CelayaNew on Amplifa
About the Coroplast Group
The Coroplast Group is an internationally active manufacturer of technical adhesive tapes, cables, wires, wiring harnesses and injection-moulded components headquartered in Wuppertal. The family business, founded in 1928 by Fritz Müller, is run by the third generation and comprises three brands: Coroplast Tape (technical adhesive tapes), Coroflex (cables & wires) and WeWire (wiring harnesses). The value chain includes in-house compounding of plastic compounds, calendering of PVC films, extrusion for cable insulation and injection moulding of plastic components; materials processed include PVC, thermoplastic materials, elastomers, copper and solvent-free acrylate adhesives. Customers are predominantly from the automotive industry, as well as from retail, the trades, construction trades and general industry. With around 6,800 employees, of whom approx. 900 are at the Wuppertal headquarters, the group produces in Germany, Poland, China, Tunisia, the USA and Mexico. Group revenue in 2025 was around EUR 740 million.
- Site
- Wuppertal
- Processes
- Manufacture of technical adhesive tapes, Cable and wire production, Wiring harness manufacture, Injection moulding of plastic components, Calendering of PVC into films, Extrusion (cable insulation/films), Compounding of plastic compounds (own compounding plant), Impregnation of oil sleeves with impregnating varnishes
- Materials
- PVC (polyvinyl chloride), Copper, Thermoplastic materials, Elastomers, Acrylate adhesives (solvent-free, aqueous dispersion), Textile fabrics (insulating sleeves), Polyvinyl chloride, Acrylate adhesives (solvent-free)
- Certificates
- ISO 9001:2015, IATF 16949:2016, ISO 14001:2015, ISO 45001:2018, ISO 50001:2018, TISAX
- Founded
- 1928
- Industries
- Automotive, Electrical/battery industry, Retail, Trades/Construction, Industry, Technical insulation
- 01
Compounding of plastic compounds
- 02
Calendering of PVC films
- 03
Extrusion (cable insulation/films)
- 04
Injection moulding of plastic components
- 05
Assembly of cables and wires
- 06
Manufacture of wiring harnesses
- 07
Assembly and service centres close to automotive customers
Materials & Processes
Polyvinyl chloride
Processed historically as one of the first users; the basis for insulating sleeves, insulated wires and calendered adhesive tape films.
Copper
Conductor material for unbraided copper conductors, cables and wiring harnesses.
Thermoplastic materials
Complement conventional PVC in wiring systems and cable insulation.
Elastomers
Processed in the in-house compounding plant for wiring systems.
Acrylate adhesives (solvent-free)
Aqueous dispersions, pioneering the use of self-adhesive insulating tapes without solvents.
Textile fabrics
Base material for impregnated insulating and oil sleeves.
Products & Components
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Manufacture of technical adhesive tapesPlastics | – | – | – | – | PVC |
| Cable and wire productionPlastics | – | – | – | – | Copper, PVC |
| Wiring harness manufactureAssembly | – | – | – | – | Copper |
| Injection moulding of plastic componentsPlastics | – | – | – | – | Plastics |
| Calendering of PVC into filmsPlastics | – | – | – | – | PVC |
| Extrusion (cable insulation/films)Plastics | – | – | – | – | PVC |
| Compounding of plastic compounds (own compounding plant)Plastics | – | – | – | – | PVC, Thermoplastics, Elastomers |
| Impregnation of oil sleeves with impregnating varnishesSurface treatment | – | – | – | – | Textile |
3 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Extruders (cable insulation/thermoplastic processing) | – | – | – | – | Wuppertal |
| Calendering line | – | – | – | – | – |
| Injection moulding machines | – | – | – | – | – |
Additional services
Reference customers
Quality & Certification
The Coroplast Group pursues a zero-defect strategy with an integrated quality management system at all sites and the company's own continuous improvement concept COROZEN (modelled on Kaizen). Certifications include, among others, ISO 9001, IATF 16949, ISO 14001, ISO 45001, ISO 50001 as well as TISAX for information security.
| Evidence | Wuppertal/Schönebeck |
|---|---|
| ISO 9001:2015 | |
| IATF 16949:2016 | |
| ISO 14001:2015 | |
| ISO 45001:2018 | |
| ISO 50001:2018 | |
| TISAX |
History
- 1928
Foundation of "Fritz Müller Elektroisoliermaterial" by Fritz Müller on 3 February 1928 in Wuppertal-Barmen with a loan of 6,000 Reichsmark; distribution of electrical insulating materials and the start of in-house production (impregnating oil sleeves).
- 1929–1934
Operation with five employees; manufacture of textile, varnish-impregnated sleeves and automotive lacquered cables; customers included AEG and automobile manufacturers; overcoming the Great Depression.
- 1935–1943
Processing of PVC as one of the first users; purchase of the first extruder; in the Second World War, destruction of large quantities of raw materials by bomb damage at the Wuppertal plant (1943).
- 1945
Death of founder Fritz Müller on 5 June 1945; new start of production at the Wuppertal plant.
- Ende 1940er
Renaming to Coroplast Fritz Müller; calendering of PVC films as the basis for self-adhesive insulating tapes; pioneering use of solvent-free acrylate adhesives in aqueous dispersions.
- 2020
The three business units become independent brands: Coroplast Tape (technical adhesive tapes), Coroflex (cables & wires) and WeWire (wiring harnesses).
- 2024/2025
Renewal of ISO and IATF certificates and TISAX recertifications; group revenue in 2025 at approx. EUR 740 million.