/ KF5th Congress of Plastics Converters Compounding Technologies, Advantages and Applications of Buss Kneaders Dipl. Ing. (TH) Frank L. Knittel Business Manager Plastic Compounding Technologies

/ KF5th Congress of Plastics Converters Contents of Presentation Buss Kneader working principle Technical features and general advantages Comparison with twin screw extruders Compounding applications with advantages of Buss Kneader Summary Contact information

/ KF5th Congress of Plastics Converters Buss Kneader Working Principle

/ KF5th Congress of Plastics Converters Self-cleaning and Mixing Efficiency Distributive mixing by screw flight movement through the melt Dispersive mixing in the shear gap between bolt and screw flight

/ KF5th Congress of Plastics Converters General Buss Kneader Advantages - Split barrel for easy cleaning maintenance and modifications - Segmented screw and liners - Working principle ensures optimal temperature and shear control - Highest mixing efficiency for max. filler loading - Liquid tempering of barrel and screw for perfect process conditions - Exact measurement of melt temperature via thermocouples in pins - Max. feeding of liquid additives via injection pins - Newest Kneader series with more efficient 4-flight screw

/ KF5th Congress of Plastics Converters Full modularity of process section The screw consists of individual elements, which can easily be exchanged or replaced. Also kneading pins and barrel liners can easily be exchanged or replaced.

/ KF5th Congress of Plastics Converters Exact measurement of melt temperature Thermocouple located in pin and directly immersed in polymer melt

/ KF5th Congress of Plastics Converters Max. feeding of liquids via injection pin Liquid directly injected into polymer melt

/ KF5th Congress of Plastics Converters Shear rate comparison with co-rot. TSE

/ KF5th Congress of Plastics Converters Shear rate comparison with co-rot. TSE

/ KF5th Congress of Plastics Converters Discharge arrangements of Buss Kneader Typical Applications: PVC Peroxide crosslinkable XLPE Extremely high filled compounds HFFR compounds Multipurpose applications Semiconductives, master batches Silane crosslinkable XLPE Low viscous or sticky compounds (TPE, TPV)

/ KF5th Congress of Plastics Converters quantec ® Kneader for PVC Advantages of Kneader: -Lowest possible temperature level -Perfect degassing in cascade tube -Start up chute for easy start up -Cascade configuration is most flexible -Excentrical die face pelletiser for lowest back pressure -Swing out pelletiser design for easy product change over

/ KF5th Congress of Plastics Converters quantec ® Kneader for calender feeding Advantages of Kneader: -Lowest possible temperature level -Compounding & degassing in one step -Intermittent cutting device ensures uniform & compact lumps -Most compact machine design

/ KF5th Congress of Plastics Converters MX Kneader for Cable Compounds Advantages of Kneader: -Incorporation of highest filler levels for HFFR and Semicon -Perfect dispersion of powders -Unique temperature control for ATH compounds -Excentrical die face pelletiser for lowest back pressure -Swing out pelletiser design for easy product change over

/ KF5th Congress of Plastics Converters MX Kneader for Masterbatches Advantages of Kneader: -Incorporates highest contents of pigments, fillers and functional additives -Perfect dispersion of powders -Unique temperature control for high viscous base polymers -Easy cleaning during colour or product changes due to split barrel design

/ KF5th Congress of Plastics Converters quantec ® Kneader for XLPE Advantages of Kneader: -Injection of peroxid or silane via injection pins -Unique temperature control for peroxide (< 130° C) -Excentrical die face pelletiser for lowest back pressure -Up to MV XLPE quality can be produced in one step -Most compact XLPE production system

/ KF5th Congress of Plastics Converters CP Kneader mixes Carbon Paste for Anodes This Kneader series has nothing to do with plastic industrie. It should just show our biggest machine!

/ KF5th Congress of Plastics Converters Summary The Buss Kneader is a compounding extruder with rotating-oscillating screw interacting with static kneading pins in the barrel This special working principle combines perfect dispersive and distributive mixing with minimal heat up of the melt Using a Buss Kneader is mainly advisable for temperature and shear sensitive applications For easy cleaning and quick maintenance all Buss Kneaders have a split barrel design for opening The kneading pins can be also effectively used for liquid injection into the process chamber and for measuring exact melt temperature along the barrel

/ KF5th Congress of Plastics Converters Contact Information Buss AG Hohenrainstr Pratteln Switzerland Phone Fax Dipl. Ing. (TH) Frank L. Knittel Business Manager Plastic Compounding Technologies Phone Mobile Fax