Multi-Screw Compounding | 1 MINUTE READ

Compounding: Twin Screw in a New Size

Designed especially for research and development as well as for production of small batch sizes.

Share

Facebook Share Icon LinkedIn Share Icon Twitter Share Icon Share by EMail icon Print Icon

Coperion has expanded its STS twin-screw series by one more size: The new STS 25 Mc11 extruder features a 25-mm screw; it’s built for R&D and and is designed especially for research and development as well as for production of small batch sizes up to about 200 lb/hr. The machine debuted during last month’s Chinaplas 2019 in Guangzhou, China.

Like other machines in the STS series, this 25-mm twin is designed simply and is said to be operator-friendly and easy to clean. Its feed barrel is equipped with an exchangeable sleeve insert to facilitate cleaning. In addition, the die head features a quick-release design for easy operation and faster product changeovers. The base frame has a closed, simple-to-clean surface, and is equipped with castors for easy movement of the extruder and fast installation. Water cooling, vacuum unit and air supply can be integrated into the base frame as an option.

Coperion has equipped the new STS 25 Mc11 extruder with cartridge heaters for precise single zone tempering of each individual barrel. The entire STS series has the same screw diameter ratio (Do/Di : outer screw diameter to inner screw diameter) of 1.55 and the same maximum specific torque Md/a³ of 11.3 Nm/cm³. That way, production parameters of the STS 25 Mc11 can be reliably scaled up to larger STS sizes. The STS 25 Mc11 Coperion exhibited at featured a Coperion K-Tron twin-screw feeder K-ML-SFS-KT20.

RELATED CONTENT

  • Enhancing Biopolymers: Additives Are Needed for Toughness, Heat Resistance & Processability

    Plastics are going “green,” but they will need some help to get there. Biodegradable polymers derived from renewable resources are attracting lots of interest and publicity, but that enthusiasm is counterbalanced by persistent questions of availability, cost, performance, and processability. All these issues are inter-related: Increasing demand will lead to more capacity, which will presumably lead to lower prices. But the foundation is market demand, which ultimately depends on whether biopolymers will have the performance properties and processability to compete with existing non-renewable plastics.

  • Slip Agents: Extended Performance Range for Polyolefin Films

    Newer specialty slip masterbatches go beyond traditional capabilities to provide greater thermal stability, reliability, and ability to hold COF steady during laminating.

  • Hot-Fill Packaging: OPP and 'Panel-Less' PET Bottles Grab the Spotlight

    Improved clarity and cost competitiveness, added to its inherent heat resistance, are reviving OPP’s prospects in hot-fill barrier containers. But hot-fill PET containers are raising the bar with higher productivity and ‘panel-less’ bottle designs.