STS Twin Screw Extruders

STS Mc¹¹ Two-stage Compounder

Get in touch about this offering
Two-stage compounding system STS 75 Mc¹¹/200 for PVC production
Two-stage compounding system STS 75 Mc¹¹/200 for PVC production
Download large image
STS Mc¹¹ two-stage - transfer from twin screw to single screw process section
STS Mc¹¹ two-stage - transfer from twin screw to single screw process section
Download large image
Coperion's two-stage compounding system STS 96 Mc¹¹/250
Coperion's two-stage compounding system STS 96 Mc¹¹/250
Download large image
Die plate of the STS Mc¹¹ two-stage compounder
Die plate of the STS Mc¹¹ two-stage compounder
Download large image

Two-stage compounder for the production of cable compounds

Top quality PVC, cables and special compounds can only be processed economically with reliable compounding and pelletizing technology. For the Non-European market Coperion has designed a STS Mc11 two-stage compounding system specifically for the production of temperature and shear sensitive plastics. This two-stage processing system with the STS Mc11 twin screw extruder and a single discharge screw ensures both high product quality and maximum economic efficiency in the processing of PVC, cables and special compounds.

Thanks to Coperion’s high standard manufacturing know-how this two-stage compounding system ensures consistency and repeatability of product quality, high throughput rates, more rentability and flexibility.

THE ADVANTAGES OF THE STS Mc¹¹ Two-stage

  • Excellent feeding properties, even for difficult to feed ­powders and hot premixes
  • Gentle product handling, especially in the pressure build-up zone before the die plate
  • Short, defined residence time
  • Uniform product flow through the die plate
  • Precise temperature control
  • Low specific energy input
  • Effective degassing
  • Easily adaptable to new requirements
  • Fast, convenient cleaning
  • Wide range of application

Related Industries

  • Plastics

TYPICAL AREAS OF APPLICATION OF THE STS MC¹¹ TWO-STAGE COMPOUNDER

Soft PVC

  • PVC cables: insulation material, sheathing and bedding compounds
  • Materials for shoes and shoe soles (also PVC-P with foaming agent)
  • Materials for the extrusion of profiles and hoses (including medical applications)
  • Injection molding compounds
  • Calendered films and sheets for flooring

Rigid PVC

  • Materials for the extrusion of profiles for interior and exterior uses
  • Injection molding grades for fittings, etc.
  • Blow molding grades for bottles, containers, etc.
  • Alloys and blends
  • Films (calender feeding)

Crosslinkable polyethylene

  • PEX pipe material
  • Silane crosslinking cable compounds for low voltage applications
  • Peroxide crosslinking cable compounds for middle and low voltage applications

Special compounds

  • Halogen-free, self-extinguishing formulations for cables (HFFR)
  • Elastomer-based compounds for low, medium and high voltage cables
  • Crosslinkable PE (incorporating peroxide)

Principle of the STS two-stage compounder

Coperion twin screw extruder STS working principle
  1. Feeding
  2. Plasticizing, mixing and homogenizing in the twin screw process section
  3. Open, pressureless product transfer into the single screw with the possibility of degassing
  4. Gentle discharge through single screw
  5. Air-cooling pelletizing or eccentric pelletizing – optionally available with other pelletizing methods

Technical data

STS Mc11 Two-Stage 35/120 50/150 65/180 75/200 96/250

125/350
Motor power twin screw [kW I Hp] 40 I 54 110 I 148 210 I 282 322 I 432 708 I 949 1,530 I 2,502
Motor power single screw [kW I Hp] 22 I 30 37 I 50 55 I 74 75 I 101 110 I 148 250 I 335
Screw speed twin screw max. [min⁻¹] 600 600 600 600 600 600
Screw speed single screw max. [min⁻¹] 75 75 75 75 75 75
Max. throughput [kg/h I lbs/h] - HFFR

35-85 I 
77-187

 100-260 I
220-573		 200-480
441-1,1058		 300-700 I 
661 - 1,543

630-1,450 I
1,389 - 3,197

 1,350-3,100 I 
2,976-6,834
Max. throughput [kg/h I lbs/h] - PVC-P 105-200 I
231-441		 310-600
683-1,323		 590-1,000 I 
1,301 - 2,205		 900-1,800 I 
1,984-3,968		 1,850-3,460 I 
4,079 - 7,628		 4,000-7,500 I 
8,818-16,535
Max. throughput [kg/h I lbs/h] - PVC-U 50-105 I 
110 - 231		 150-320 I 
331-705		 300-700 I 
661-1,543		 450-1,050 I 
992 - 2,315		 950-2,200 I 
2,094-4,850		 2,000-4,800 I 
4,409-10,582
Max. throughput [kg/h I lbs/h] - XLPE (DCP) low/medium voltage cables

35-100 I 
77-220

 100-300 I 
220-661		 220-600 I 
485-1,323		 300-1,000 I 
661-2,205		 700-1,700 I 
1,543-3,748		 1,500-3,700 I 
3,307-8,157
Max. throughput [kg/h I lbs/h] - XLPE (DCP) low voltage cables 35-85 I 
77-187		 100-250 I
220-551		 220-500 I 
485-1,102		 330-700 I 
728-1,543		 700-1,500 I 
1,543-3,307		 1,500-3,200 I 
3,307-7,055

 

The right STS twin screw extruder for every application

 

Coperion STS Twin Screw Extruders

STS Twin Screw Extruders

Overview of all models

Coperion STS Mc11 Twin Screw Extruder

STS Mc¹¹

Extruder with specific torque 11.3 Nm/cm³

Coperion STS Mc PLUS Twin Screw Extruder

STS Mc PLUS

Extruder with specific torque 13.6 Nm/cm³

Coperion STS Mc11 Laboratory Twin Screw Extruder

STS 25 Mc¹¹

Laboratory extruder

Downloads

Interested in more about PVC compounding?

Read more

Comprehensive solutions for HFFR processing

Discover more

See the latest newsletter edition

Find out more

You need more info about the STS Mc¹¹ two-stage?

Contact us

Subscribe to the Coperion Newsletter