Manufacturer of spiral belts made from high-performance monofilaments for paper machines, the nonwovens industry and the food industry
Württembergische Spiralsiebfabrik GmbH
Hans-Zinser-Strasse 1, 73061 Ebersbach (Baden-Württemberg)New on Amplifa
About the Württembergische Spiralsiebfabrik
The Württembergische Spiralsiebfabrik GmbH (WSF) was founded in 2010 in Ebersbach (Baden-Württemberg) and, as a full-range manufacturer, produces spiral belts made from plastic monofilaments for a wide variety of applications. The portfolio includes fixed and finished spiral belts as well as raw belt fabric, which, when processed, are used as flexible machine clothing, among other things, in paper machines with production speeds of up to 2000 m/min. Materials processed include PET in several grades (standard, hydrolysis-resistant, food-grade, with silicone admixture), PPS, PEEK, PA, PTFE coatings, antistatic bicomponent materials, and monofilaments twisted with stainless steel wire. The final step in production is thermal fixing with stretching, which ensures dimensional stability, strength, and uniform air permeability. The production systems were developed and built in-house, so that application, material, and manufacturing technology can be matched to one another. With the bicomponent development Spiralsolution 72000 TCPEEK7 (DIABOLO), the company combines a PEEK core and a fluoropolymer coating for high-temperature applications. The company's commitment to research and development was recognized in 2023 by the Stifterverband.
- Site
- Ebersbach
- Processes
- Manufacture of spiral belts (spiral belts made from monofilaments), Thermal fixing of spiral belts (heat treatment with stretching for dimensional stability and, Fixing/finishing of spiral belts (fixed and finished spiral belts, raw belt fabric), Food-grade spiral belts (certified), Material certificates and datasheets, Thermal fixing of the spiral belts, Finishing of fixed and raw belt fabric, Development of novel spiral belts (e.g. bicomponent monofilaments)
- Materials
- Polyethylene terephthalate (PET) standard-grade polyester, PET-Q (PET with silicone admixture, abrasion-resistant), PET food grade (food-safe, certified), PET-Teflon blend (with PTFE, ETFE, FEP), PTFE (Teflon coating), Polyphenylene sulfide (PPS), Polyetherketone (PEEK), Polyamides (PA)
- Certificates
- R&D certificate Stifterverband (Commitment to Research and Development 2023), Food-grade (certified), Material certificates and datasheets
- Founded
- 2010
- Industries
- Paper industry (paper machines up to 2000 m/min), Nonwovens industry, Food industry, High-temperature and chemically demanding applications, Paper industry (spiral belts for paper machines), Applications with high-temperature / chemically demanding environments
- 01
Raw material and material production (monofilaments made of PET, PPS, PEEK, PA,
- 02
Manufacture of the spiral belts
- 03
Thermal fixing with stretching
- 04
Finishing of fixed and raw belt fabric
- 05
Material certificates and datasheets
Materials and Processes
Polyethylene terephthalate (PET) Standard
High breaking strength, dimensional stability and abrasion resistance, usable dry up to 150 °C.
PET with silicone admixture
Particularly abrasion-resistant and easily cleanable with high-pressure washing.
PET Food Grade
Certified food-safe with low water absorption and high abrasion resistance.
PET-Teflon blend (PTFE, ETFE, FEP)
Improved anti-stick properties, resistant dry up to 160 °C and wet up to 140 °C.
PTFE (Teflon coating)
Long-term resistant from -200 °C to +260 °C as well as against solvents and aggressive chemicals.
Polyphenylene sulfide (PPS)
Chemically resistant against acids and alkalis, usable in the high-temperature range up to 200 °C and flame-retardant.
Polyetherketone (PEEK)
Very high hydrolysis and continuous temperature resistance up to 250 °C.
Polyamides (PA)
Resistant in alkaline media, very abrasion-resistant and tough.
Antistatic (bicomponent material)
Core made of hydrolysis-stabilized PET, sheath made of statically dissipative blend with resistance in the range of 10^6 ohms.
PET twisted with metal wire
Hydrolysis-stabilized PET monofilament twisted with stainless steel wire, electrically conductive in the ohm range.
TCPEEK (bicomponent monofilament)
PEEK core coated with fluoropolymer, for high-temperature applications with anti-adhesive surface.
Sites
Ebersbach
DEHeadquarters and production
- Materials
- PET, PPS, PEEK, PA, PTFE, antistatic and bicomponent materials
- In-house developed production systems
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Manufacture of spiral belts (spiral belts made from monofilaments)Plastics | – | – | – | – | PET, PPS, PEEK, PA, Antistatic, Teflon/PTFE, PET-Teflon blend, Bicomponent monofilaments |
| Thermal fixing of spiral belts (heat treatment with stretching for dimensional stability andHeat treatment | – | – | – | – | PET, PPS, PEEK, PA, Teflon/PTFE |
| Fixing/finishing of spiral belts (fixed and finished spiral belts, raw belt fabric)Assembly | – | – | – | – | PET, PPS, PEEK, PA, Antistatic, Teflon/PTFE |
Additional services
Quality
WSF provides material certificates and datasheets for all products; food-grade spiral belts are certified. For the material properties, datasheets are available for PET, PPS, PEEK, antistatic materials and PA, as well as 48 datasheets on monofilaments.
| Evidence | Ebersbach |
|---|---|
| Food-grade (certified) | |
| Material certificates and datasheets |
Company History
- 2010
Foundation of the Württembergische Spiralsiebfabrik GmbH (WSF)
- 2023
Award from the Stifterverband for commitment to research and innovation (R&D survey)