PolyLab System Twin Screw Extruders :

Twin-screw extruders CTW100 and PTW25

Feeding of material into twin-screw extruders Co-rotating Counter-rotating

Twinscrew Extruder Counter-rotating Rheomex Twinscrew Extruders: Defined residence time (good for i.e.rigid PVC) Selfcleaning No controlled feeding needed High shearing High pressure builtup Co-rotating Rheomex Twinscrew Extruders: Mixing of shear sensitive material (i.e. Polyolefins) Compounding, Masterbatch production Venting Controlled shearing Flexible screw design Controlled feeding necessary

Conical Twin Screw Extruder Rheomex CTW100p conical design of barrel and screws: mechanical stability / easy cleaning counter rotating screws: defined resident time / forced material transport selfcleaning 6 sensor ports: exact examination of sample behaviour dosing via sensor ports possible venting opening: easy venting with venting screws 3 different screw geometries: - intensive mixing screws - standard screws - venting screws

Rheomex CTW100p

Rheomex CTW100p

Rheomex CTW100p

Screw geometries for CTW100p extruder Venting screw Intensive mixing screw Standard screw

Rheomex CTW100p

Parallel twin-screw extruder Rheomex PTW Processing tasks - 1 Plasticising Mixing Homogenising Cooking Gelling Degassing of momomers, oligomers, solvents etc. Concentrating of polymer solutions Modifying by incorporation of plasticizers, cross-linking agents, flame retardants, UV-stabilisers, etc.

Parallel twin-screw extruder Rheomex PTW Processing tasks - 2 Incorporation of fillers and reinforcing agents such as: wood flour, talc, glass fibres etc. Alloying of polymers Polycondensation, Polyaddition and Polymerization of polymers Chemical reactions Dispersing of pigments and additives Breaking down of high molecular particles

Parallel twin-screw extruder Rheomex PTW Examples of application Polyethylene (LLDPE/LDPE/HDPE) Nanocomposites (Clay, MWCT) Polypropylene (PP) ABS Polystyrene (PS) PVC (soft) Polyester Polyamide Polyformaldehyde Cellulose ester Polyuretthane (PU) Polycarbonate (PC) Food Starch Polyphenylene oxide (PPO) Polysulphone (PSU) Polyacrylonitrile Toner Masterbatch Powder coating materials curing moulding compounds Ceramic materials Pharmaceutical products Polymethylmethacrylate (PMMA)

New PTW16 XL for PolyLab OS Horizontal split, with a lift-off top to be opened for ease of cleaning, simple removal of the screws and visualisation of the melting process. The segmented top barrel part is built with 4D modules to be easily reconfigured by the user. Barrel segments are available for cooling feeding solids, liquids and for venting.

Maximum flexibility… ... Feed ports... ... Lenght ... ... Screw design ... ... Split Barrel

flexible screw configuration Rheomex PTW16 flexible screw configuration

PTW16 OS - Maximum flexibility… ... Split Barrel

PTW16 OS - Maximum flexibility…

PTW16 OS - Maximum flexibility… 25 L/D + 15 L/D = 40 L/D

… Why don´t you buy two compounders!” PTW16 XL: 25 + 15D extendable “what is the right length for my application: L/D 25, or better L/D 40? … Why don´t you buy two compounders!” Flexible Length: not for all applications a long extruder is useful, as shear sensitive materials can degrade and 25D is long enough for basic applications. Optional 15D barrel extension to enhance e.g. residence time (for reactive extrusion) or multiple feed ports, easy to use (< 15 min by operator!) Software recognizes the Extension unit

Metering Feeder for PEEK Pellets Cabon Fiber Roving (endless) Example: Compounding Metering Feeder for PEEK Pellets Cabon Fiber Roving (endless) Pelletiser Varicut T = 380°C 20-40% C-Fiber (wt/wt)

Rheomex PTW16 Technical Specifications Screws: Segmented, with slip-on elements, allowing variable configuration Screw diameter: 16 mm Corotating, intermeshing screws Screw shafts: Design: hexagonal Material: Heat treated, abrasion resistant

Rheomex PTW16p Screw elements:

Rheomex PTW24p

New Twin Screws PTW24/28p 2 modular Models 28D and 40D up to 1100 rpm ... Happy customers

Economic PTW24 models comparison to 24 „HC“ type Venting to Atmosphere Or option Liquid feed Vacuum venting main secondary feed PTW24/40p (HC) 4D modular Elements Side feed 2 Side feed Side feed option main secondary feed Vacuum venting PTW24/25p (TC) PTW24/30p (TC)

Speed range: 0 - 500 rpm (optional 0-1000 rpm) Rheomex PTW24 Technical Specifications Speed range: 0 - 500 rpm (optional 0-1000 rpm) Pressure range: 100 bar (150 bar optional) Temperature range: max. 300 °C (400°C optional) Screw diameter: 24 mm Barrel length (L/D) : 28:1 to 40:1 (using the optional barrel extension unit)

Rheomex PTW24

Rheomex PTW24 – Advantages: Extruder barrel: segmented and hinged Segmented screw Sidefeeding

Rheomex PTW24 Technical Details: Bore diameter: 24 mm Screw Centres: 18.75 mm Channel Depth: 5.2 mm Clearance: 0.2 mm Total barrel length: 672 mm. (28:1 L/D, in 4:1 modules) Barrel extendable to 40:1 length with optional barrel extension Feed Zone: Water Cooled Processing Zones: Electrically Heated / Water cooled Extrusion Die: Electrically heated

Rheomex PTW24p Screw elements:

Rheomex PTW25

Rheomex PTW25 with PolyLab System Master Slave Heat- exchanger PolyLab System Rheomex PTW25

Parallel twin-screw extruder Rheomex PTW25 Technical data - 1 Drive: PolyLab RC 300p Extruder: segmented barrel Length: 18 - 48 D Screws: segmented screw elements Outer screw diameter: 25 mm Core diameter: 17 mm Centre distance: 21.5 mm Max screw speed: 400 rpm Screw elements: Conveying elements Kneading blocks Toothed blocks

Parallel twin-screw extruder Rheomex PTW25 Technical data - 2 Max. barrel temperature: 400 °C Max. melt pressure: 300 bar Barrel segments: Open barrel 4D Venting, feeding Closed barrel 4D Combi barrel 6D Side feeding and venting Metering barrel 4D Closed barrel 6D Open barrel 6D Venting, feeding Measuring disk 1.5D Measurement of melt- temperature or -pressure

Parallel twin-screw extruder Rheomex PTW Screw Elements Conveying elements: Profiles with open chambers are used: - in the feeding sections - for melt exchange (longitudinal mixing) - for degassing (venting) Profiles with closed chambers are used: - for high pressure built up - in front of kneading elements

Parallel twin-screw extruder Rheomex PTW Screw Elements Conveying elements:

Rheomex PTW – Conveying Elements

Parallel twin-screw extruder Rheomex PTW Screw Elements Mixing Elements : Mixing Elements are used to introduce shear energy to the extruded materials. The disks are arranged in different offset angles used for: - plasticizing - mixing - dispersing

Parallel twin-screw extruder Rheomex PTW Screw Elements Mixing Elements :

Mixing elements

Parallel twin-screw extruder Rheomex PTW25 Screw Elements Toothed blocks : Toothed blocks are special mixing elements, used for the distribution of even small quantities of additives. The shearing energy introduced to the polymer is significantly lower than that of the kneading elements. The open worked flights of the mixing discs have a special asymmetric design.

Parallel twin-screw extruder Rheomex PTW25 Screw Elements Toothed blocks :

Rheomex PTW Side-feeding Venting Flow direction Side feeding Application: Feeding of glass fibres, fillers or other additives into the molten polymer. Venting of the introduced air. Requirement: 2 separate feeders necessary for side feeding. One side stuffer with constant (high) dosing speed to press the material into the barrel. One feeder to controll the feeding rate. For constant feeding ratio between polymer and additives gravimetric controlled feeders can be used.

557- 5001 Rheomex PTW 25 x 20D Barrel segments: Feeding barrel 4D Venting Barrel segments: Feeding barrel 4D Closed barrel 6D Open barrel 6D Measuring barrel 4D Application: Melting of polymers Venting

Rheomex PTW 25 x 32D Production of Masterbatch Side-feeding (pigments) Venting (vacuum) Venting (atmosphere) Feeding (polymer) Barrel segments: Feeding barrel 4D Closed barrel 6D Combi barrel 4D Closed barrel 4D Open barrel 6D Open barrel 4D Measuring barrel 4D

Screw configuration Rheomex PTW25/38 For typical food extrusion 25/1/2 37.5/1/2 ZB-37.5 E-KB-25/LI E-KB-37.5/LI Screwtip Dry-Blend Liquids Steam Feeding Mixing/Hydration Cooking Venting Cooling

Masterbatch production Vacuum Premix Atmosphere Parallel twin-screw Water bath Pelletizer