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extrusion of plastic
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1
PolyLab PolyLab SystemSystem
• Single Screw Extruders :
2
Extrusion Principle:Extrusion Principle:
Drive UnitDrive Unit
FinalFinalProductProduct
PelletizerPelletizer
TakeOff TakeOff DeviceDevice
Feeding Feeding SystemSystem
Extruder Extruder BarrelBarrel
TrainedTrainedOperatorOperator
ExtruderExtruderScrewScrew
3
Rheomex single screw extruderRheomex single screw extruder
Feeding coolingSensor ports
(2 standard, others optional)Screw back-pressuresensor (optional)
collars for heating and cooling
4
Rheomex ApplicationRheomex Application
Extruders are generally used to:• transport material• plasticize• compress• homogenize• compound• vent• chemical reaction• building up pressure
5
Rheomex ApplicationRheomex Application
Measuring of process variables:• torque• melt temperature• melt pressure• mass flow
Optimizing of process parameters:• extruder speed• temperature profile• pressure• screw design
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Optional accessories forOptional accessories for
SSingle screw extrudersingle screw extruders• Various control and monitor panels
• Wear reduced barrel
• Chemical resistant barrel
• Axial force sensor
• Venting port for Rheomex 252p and 332p
• additional sensor ports for melt-temperature and melt-pressure measurement
7
Screws for single screw extrudersScrews for single screw extruders
Conical Core Screw
Standard MeteringScrew
Short MeteringScrew
Venting Screw
Mixing Screw
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Screw for single screw extruderScrew for single screw extruder
Rotational direction
Basic material: nitrided steel
screw flights: nitrided and grinded surface
screw flow channel:chrome plated surface
9
Pressure builtPressure built--up in a single screw extruderup in a single screw extruder
barrel - length [L/D]
pressureP2
P3P4
P1
P5
11 14,5 20,5 24,50
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Special bimetallic single screw extrudersSpecial bimetallic single screw extruders
• Type 1:for highly filled polymers like:ABS, EVA, LCP, PA, PC, PE, PI, POM, PS, PBTP, PETB, PVC, PP, Thermosets, Phenol resins type: 11, 12, 31Polyester resins type: 801 to 804Rubber compoundsin combination with wear increasing fillers like:minerals e.g. SiO2, CaSiO3, CaCO3metal oxides e.g. TiO2, Fe2O3,ceramic materials Al2O3others e.g. glass fibres, carbon fibres, mica, flame retardants
• Type 2: for corrosive fluorinated polymers like:PTFE, PVDF (with and without fillers)
• Maximum operation temp.: 500 °Cdelivery time: app. 5-6 month
steel barrel
Powder metal insert
11
Zone 1(heating/cooling)
Zone 2
Feeding roll
Motor forroll feeder
Sensor ports
feeding rollscrewextruder barrel
rubber strip
Rheomex 104Rheomex 104
for rubber applicationfor rubber application::
12
Special single screw extrudersSpecial single screw extrudersfor food extrusionfor food extrusion
è Special grooved extruder barrel:
non-wallsticking material can be extruded
extruderscrew
extruderbarrelgrooves
13
PolyLab PolyLab SystemSystem
• Twin Screw Extruders :
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TwinTwin--screw extruders CTW100 and PTW25screw extruders CTW100 and PTW25
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Feeding of material into Feeding of material into twintwin--screw extrudersscrew extruders
CoCo--rotatingrotating CounterCounter--rotatingrotating
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Twinscrew ExtruderTwinscrew Extruder
CounterCounter--rotatingrotating Rheomex Twinscrew Extruders:Rheomex Twinscrew Extruders:- Defined residence time (good for i.e.rigid PVC)- Selfcleaning- No controlled feeding needed- High shearing- High pressure builtup
CoCo--rotatingrotating Rheomex Twinscrew ExtrudersRheomex Twinscrew Extruders::- Mixing of shear sensitive material (i.e. Polyolefins)- Compounding, Masterbatch production- Venting- Controlled shearing- Flexible screw design- Controlled feeding necessary
17
Conical TwinConical Twin SScrew Extrudercrew ExtruderRheomex CTW100pRheomex CTW100p
• conical design of barrel and screws:mechanical stability / easy cleaning
• counter rotating screws:defined resident time / forced material transportselfcleaning
• 6 sensor ports:exact examination of sample behaviourdosing via sensor ports possible
• venting opening:easy venting with venting screws
• 3 different screw geometries:- intensive mixing screws- standard screws- venting screws
18
Rheomex CTW100pRheomex CTW100p
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Rheomex CTW100pRheomex CTW100p
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Screw geometries for CTW100p extruderScrew geometries for CTW100p extruder
Venting screw
Intensive mixing screw
Standard screw
21
Parallel twinParallel twin--screw extruder Rheomex PTWscrew extruder Rheomex PTWProcessing tasks Processing tasks -- 11
• 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.
22
• 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 twinParallel twin--screw extruder Rheomex PTWscrew extruder Rheomex PTWProcessing tasks Processing tasks -- 22
23
Parallel twinParallel twin--screw extruder Rheomex PTWscrew extruder Rheomex PTWExamples of Examples of applicationapplication
• 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)
24
New PTW16 XLNew 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.
25
... ... ... Screw Screw Screw design ...design ...design ...
... ... Feed portsFeed ports......
... Split Barrel... Split Barrel... Split Barrel
Maximum flexibility…Maximum flexibility…
... ... LenghtLenght ......
26
flexible flexible screw configurationscrew configuration
Rheomex PTW16Rheomex PTW16
27
PTW16 OS PTW16 OS -- Maximum flexibility…Maximum flexibility…
... Split Barrel... Split Barrel... Split Barrel
28
PTW16 OS PTW16 OS -- Maximum flexibility…Maximum flexibility…
25 L/D25 L/D
++
15 L/D15 L/D
==
40 L/D40 L/D
29
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
30
Example: CompoundingExample: Compounding
•• Metering Feeder Metering Feeder for PEEK Pelletsfor PEEK Pellets
••CabonCabon Fiber Fiber Roving (endless)Roving (endless)
••PelletiserPelletiser VaricutVaricut
••T = 380°CT = 380°C
••2020--40% C40% C--Fiber Fiber (wt/wt) (wt/wt)
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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
Technical SpecificationsTechnical Specifications
Rheomex PTW16pRheomex PTW16p
32
Rheomex PTW16pRheomex PTW16p
Screw elements:Screw elements:
33
Rheomex PTWRheomex PTW2424pp
34
Economic PTW24p modelsEconomic PTW24p modelscomparison to 24 „HC“ typecomparison to 24 „HC“ type
Vacuum venting
Side feed 2 Side feed
mainsecondary feed
Venting toAtmosphere
Or option Liquid feed
PTW24/40p (HC) PTW24/40p (HC) 4D modular 4D modular ElementsElements
PTW24/30p (TC)PTW24/30p (TC)
PTW24/25p (TC)PTW24/25p (TC)
Side feed option
mainsecondary feedVacuum
venting
35
• 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)
Technical SpecificationsTechnical Specifications
Rheomex PTWRheomex PTW2424pp
36
Rheomex PTW24pRheomex PTW24p
37
SidefeedingSidefeeding
SegmentedSegmented screwscrew
Extruder Extruder barrelbarrel: : segmentedsegmented and and hingedhinged
Rheomex PTW24p Rheomex PTW24p –– Advantages:Advantages:
38
Bore diameter: 24 mmScrew Centres: 18.75 mmChannel Depth: 5.2 mmClearance: 0.2 mmTotal barrel length: 672 mm.
(28:1 L/D, in 4:1 modules)Barrel extendable to 40:1 lengthwith optional barrel extension
Feed Zone: Water CooledProcessing Zones: Electrically Heated / Water cooledExtrusion Die: Electrically heated
Technical Details:Technical Details:
Rheomex PTW24pRheomex PTW24p
39
Rheomex PTWRheomex PTW2424pp
Screw elements:Screw elements:
40
Parallel twinParallel twin--screw extruder Rheomex PTWscrew extruder Rheomex PTWScrew segments 1/3Screw segments 1/3
• 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
Conveying elementsConveying elements::
41
Parallel twinParallel twin--screw extruder Rheomex PTWscrew extruder Rheomex PTWScrew segments 1/3Screw segments 1/3
Conveying elementsConveying elements::
42
Parallel twinParallel twin--screw extruder Rheomex PTW25screw extruder Rheomex PTW25
43
• Kneading blocks are used to introduce shear energy to the extruded materials.
• 5 disks are arranged in a block and arranged in different offset angles used for:
- plasticizing- mixing- dispersing
Parallel twinParallel twin--screw extruder Rheomex PTWscrew extruder Rheomex PTWScrew segments Screw segments 22/3/3
Kneading blocks Kneading blocks ::
44
Parallel twinParallel twin--screw extruder Rheomex PTWscrew extruder Rheomex PTWScrew segments Screw segments 22/3/3
Kneading blocks Kneading blocks ::
45
Mixing elementsMixing elements
46
• 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 discshave a special asymmetric design.
Parallel twinParallel twin--screw extruder Rheomex PTW25screw extruder Rheomex PTW25Screw segments Screw segments 33/3/3
Toothed blocks Toothed blocks ::
47
Parallel twinParallel twin--screw extruder Rheomex PTW25screw extruder Rheomex PTW25Screw segments Screw segments 33/3/3
Toothed blocks Toothed blocks ::
48
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.
Rheomex PTW Rheomex PTW SideSide--feedingfeeding
VentingVenting
Flow directionFlow directionSide feedingSide feeding
49
557557-- 5001 Rheomex PTW 25 x 20D5001 Rheomex PTW 25 x 20D
Barrel segments:
Feeding barrel 4DClosed barrel 6DOpen barrel 6DMeasuring barrel 4D
Application:
Melting of polymersVenting
FeedingVenting
50
Barrel segments:
Feeding barrel 4DClosed barrel 6DCombi barrel 4DClosed barrel 4DOpen barrel 6DOpen barrel 4DMeasuring barrel 4D
557557-- 5031 Rheomex PTW 25 x 32D5031 Rheomex PTW 25 x 32DPProductionroduction of of MMasterbatchasterbatch
Material Shape Quantity in%
PP, PE, PET,PC, PA,etc.
powder orgranulates
60 - 80
pigments powder 20 - 40
Side-feeding(pigments)
Venting(vacuum)
Venting(atmosphere)
Venting(atmosphere)
Feeding(polymer)
51
Screw configuration Rheomex PTW25/38Screw configuration Rheomex PTW25/38
FFor typical food extrusionor typical food extrusion
25/1/2
37.5/1/2
37.5/1/2
37.5/1/2
37.5/1/2
37.5/1/2
25/1/2
25/1/2
25/1/2
ZB-37.5
25/1/2
25/1/2
E-KB
-25/LI
25/1/2
25/1/2
E-KB
-25/LI
25/1/2
25/1/2
E-KB
-37.5/LI
25/1/2
25/1/2
E-KB
-37.5/LI
E-KB
-37.5/LI
37.5/1/2
37.5/1/2
37.5/1/2
37.5/1/2
37.5/1/2
25/1/2
25/1/2
25/1/2
Screwtip
Dry-BlendLiquidsSteam
FeedingMixing/HydrationCookingVentingCooling
52
MasterbatchMasterbatch productionproduction
Vac
uum
Prem
ix
Atm
osph
ere
Parallel twin-screwWater bath Pelletizer
53
• Feeding systems :
PolyLab PolyLab SystemSystem
54
Metering FeederMetering Feeder
Motor with gearbox
StandardHopper
Closure for Cleaning
glass window
interchangeablefeeding tube
Metering screw
Extruder
PPrinciplerinciple sketchsketch::
55
MeteringMetering FeederFeeder ((adaptedadapted to PTW25p)to PTW25p)
56
• Accurate dosing of powder
• Accurate dosing of pellets
• Starved feeding to enable venting
• Starved feeding to reduce torque
• Production of masterbatches
• Feeding of parallel twinscrew extruders
ApplicationApplication::
Metering FeederMetering Feeder
57
• compact design: easy to handle
• wide feeding range
• various inserts: suitable for pellets and powder
• control box: speed control via Rheocord or manual speed control via potentiometer
• easy to combine with a second metering-feeder for controlled compounding
Features & benefits Features & benefits ::
Metering FeederMetering Feeder
58
Motor withstepless
speedcontrol
Hopper
ExtruderScrew
Extruder Barrel
ForceFeedingScrew
Application:
• feeding of sticky materials:- food extrusion
• feeding of bridge-building materials- some PVC Dry Blends
• feeding of not flowing material- grinded film- soap powder
ForceForce FeederFeeder
PPrinciplerinciple sketchsketch::
59
• Extruder Application :
PolyLab PolyLab SystemSystem
60
Cast film applicationCast film application
• Instruments:• Rheocord 300p• Extruder (single- or
twin-screw extruder)• Screws• Sheet & ribbon die• Sheet & ribbon take-off• Pressure sensor• (Screen package)• (OQT 512)
• Application:• Small production of films• Testing the processabillity • Testing of additives• Testing and optimisation of
processing conditions
• Results:• Fish-eye testing• Pigment distribution• Surface quality• Tensile testing• Weathering
61
Sheet and Ribbon DieSheet and Ribbon Die
è Die width:25/50/100/150 mm
è Die gap:adjustable(standard: 0.2-1.2 mm)
è fixed die gap on request
è Max. temperature: 360°C
è 1 measuring port
62
PVC PVC --DiesDies
•New PVC Slit dies 50mm, 100mm, Height 1mm
•Moldflow (FEM) Simulation
•Optimizied Flow
•Compact design
63
Sheet and Ribbon Take OffSheet and Ribbon Take Off
polished and temperablesteel rollers
rubber rollers
circulator
waterbathMotor
adjusting the gap
take-uproller
64
New Sheet & Ribbon New Sheet & Ribbon TakeOffTakeOff-- New design to be used with New design to be used with Haake and Prism productsHaake and Prism products
-- Two Options: Two Options: 22--Roll Roll TakeOffTakeOff33--Roll Roll TakeOff TakeOff
-- Easy access to the rollers Easy access to the rollers -- Easy handlingEasy handling-- Height adjustableHeight adjustable-- Adjustable speed ratio between Adjustable speed ratio between the steel rollers and the takethe steel rollers and the take--off rollersoff rollers
New New PostEx PostEx DesignDesign
65
PVC sheets: good & bad
Cast film applicationCast film application
66
Blown film applicationBlown film application
• Instruments:Rheocord 300pExtruder (single- or twin-screw extruder)ScrewsBlown film dieCooling ringBlown film take-offPressure sensor(Screen package)(OQT 512)
• Application:small production of filmsTesting the processability of compoundsTesting of additivesTesting and optimisation of processing conditions
• Results:Fish-eye testingPigment distributionsurface quality
67
557557-- 3175 Blown 3175 Blown FFilmilm DDieie
• Ring diameter 25mm (35mm)• Pin diameter 24mm (34mm)• Gap width 0-0.8 mm• Measuring ports 2• Max. temperature 480°C
Air
adjustable die gap
68
PolyLabPolyLab blown film combinationblown film combination
PolyLab System with extruder
Lightning Device
CCD-CameraBlown film take off
WWithith optical testing unit OQToptical testing unit OQT
69
OQTOQT-- Graphical display of Graphical display of defectsdefects
70
OQTOQT-- Graphical display of the dataGraphical display of the data and and defectsdefects
71
CompoundingCompounding
• Instruments:• PolyLab RC300p• Rheomex twin-screw
extruder• extruder Screw(s)• Pressure sensor(s)• (Screen package)• Rod die (horizontal or
vertical) or Multistrand die• Waterbath• Pelletizer
Test results:• Testing of the
processability of polymer compounds
• Testing of additives• Testing and optimisation
of processing conditions• small production of
masterbatches
72
557557-- 3235 3235 Horizontal rod dieHorizontal rod die
• Application:Universal die for extrusion tests
• manufacturing of polymer strands for the production of pellets.
• Nozzles available from: 1mm - 6mm
• Two sensor ports for pressure-and temperature-measurement
73
557557-- 3150 3150 Vertical rod dieVertical rod die
• Application:Universal die for extrusion tests
• manufacturing of polymer strands for the production of pellets.
• Nozzles available from: 1mm - 6mm
• Two sensor ports for pressure-and temperature-measurement
74
Vertical rod die Application ExampleVertical rod die Application Example
• Application:Universal die for extrusion tests, here testing of Processing additives (Dynamar) at Dyneon (NL).
• Build up of non stick layer (right picture) improves the quality.
• The effect and concentration of the processing aid can be tested with various base polymers and temperatures.
EPPM info nr. 34 6,3 / p12 (2004)EPPM info nr. 34 6,3 / p12 (2004)
75
557557-- 3180 3180 MultistrandMultistrand diedie
è Application:Universal die for extrusion tests with higher output
è manufacturing of polymer strands for the production of pellets.
è Strand diameter: 3 mm (others on request)
76
Pelletizer, optional Pelletizer, optional with with VARICUT: VARICUT: adjustableadjustable lenghtlenght
77
Rubber extrusionRubber extrusion
Instruments:• PolyLab RC300p• Rheomex 104p or 203p• Screw(s)• Pressure sensor(s)• Garvey die• Conveyor belt
Test results:• Testing of the processability
of rubber and elastomercompounds
• Testing of the influence of additives
• Testing and optimisation of the processing conditions
• Visual testing of the material flow at edges with different angle
78
557557--3230 Garvey3230 Garvey--die die
Technical data:• Die profile according to
ASTM 2230-63T• max. temperature: 360 °C• die profile does not allow to
install sensor ports
Application:• Extrusion of elastomers and
rubber for testing the flowability.
79
è Instruments:Rheocord 300pExtruder (single- or twin-screw extruder)ScrewsWire coating dieWire coating take offPressure sensor
è Application:small production of cablesTesting the processabilityof compoundsTesting of additivesTesting and optimisation of processing conditions
Wire coating applicationWire coating application
80
557557--3195 Wire coating die3195 Wire coating die
• di: 0.7 - 2.0 mm• da: 0.8 - 4.0 mm• Standard: 1.2 / 2.0 mm• Max. temperature: 480°C• Measuring ports 2
81
Fibre spinningFibre spinning
• Instruments:• PolyLab RC300p• Rheomex extruder (single
or twinscrew)• Screw(s)• (Melt pump)• Pressure sensor(s)• Screen package• Fibe spinning die with
spinning plate
Test results:• Testing of the
processability of polymer compounds
• Testing of additives at different formulations
• Testing and optimisation of processing conditions
• small production of polymer fibres
82
557557--2376 Spinning Die 2376 Spinning Die
Application:Fiber spinning
Technical data of spinning plate:number of holes: 10diameter: 200 µmlength: 0.5 mmentrance angle: 60°
spinning platebreaker plate
screen package
83
MeltpumpMeltpump:: PPrinciplerinciple
84
Filter Test ( EN 13900Filter Test ( EN 13900--5 ) 5 )
Instruments:• PolyDrive with Rheomex252• Melt pump• Pressure sensor(s)• Screen package• Filter die
Test results:• Testing the distribution of
fillers and pigments in polymer compounds
• Pressure increase in front of the screen package
85
Measurement of the pigment distribution
Testing of the purity of polymers
GeometrGeometry of y of thethe FilterdieFilterdieaccordingaccording to to thethe newnewstandardstandard EN 13900EN 13900--5 5 ((draftdraft))
557557--2413 2413 FilterFilter DieDie
acaccordingcording EN 13900EN 13900--5 (5 (draftdraft))
86
HydraulicHydraulic sscreencreen changerchanger
87
Filter (Filter (screenscreen life) test life) test EN 13900EN 13900--5 (5 (draftdraft))
Constraints:
Single Srcew extruder: D = 19 – 30 mm, L/D = 20 - 30- PolyDrive 252
Pressure at end of the extruder : constant at 30 – 60 bar- via pressure feedback loop
Melt pump: 50 – 60 ccm/min- Thermo Haake meltpump
Defined meltfilter:- filter geometry according to EN 13900-5 proposal
Defined breaker plate geometry (free area of filter):- die geometry according to EN 13900-5 proposal
88
Purge with 100g base polymerMasterbatchConditioning with base polymer
Pressure increase infront of the filterpackage
Pmax
Ps
Pmax- Ps
ts t te
ts : determination of basepressure Ps and filling of the hopper with masterbatch mixture
t : End of masterbatch mixture and filling of base polymer
te : End of pressure measurement and evaluation of maximum pressure Pmax
Filter Test SoftwareFilter Test Software
89
FPV (filter pressure value): Ps:
Pmax:Mc:
c
smax )P-(PFPVm
=
Filter Test:Filter Test: CalculationCalculation according according EN 13900EN 13900--5 (5 (draftdraft))
Filter-Pressure-Value in bar per grams [bar/g]Starting pressure in barMaximum pressure in barPigment weight in gram
90
Filter Test Software Filter Test Software –– Evaluation:Evaluation:
91
ConfigurationConfiguration::
Filter Test SoftwareFilter Test Software
92
93
Test Report Test Report forfor EN 13900EN 13900--5 (5 (draftdraft))
94
Filter Filter packagepackage –– typetype 1 1 ( 25µ )( 25µ )
d = diameter of wirew = distance of two wires
sievepackage type 1, part.no.: 005-0001The sievepackage consists of layers:
1. layer : W = 0,14 mm, d = 0,042 mm (615/108 mesh)
2. layer : W = 0,63 mm, d = 0,40 mm
W
d
direction of flow
layer 1, 2
95
d = diameter of wire w = distance of two wires
sievepackage type 2, part.-no. 005-0002the sievepackage consists of layers:
1. layer : W = 0,13 mm, d = 0,042 mm (615/128 mesh)
2. layer : W = 0,63 mm, d = 0,40 mm
W
d
direction of flow
layer 1, 2
Filter Filter packagepackage –– typetype 2 2 ( 14µ )( 14µ )
96
Pipe extrusionPipe extrusion
• Instruments:• PolyLab RC300p• Rheomex extruder (single
or twinscrew)• Screw(s)• Pressure sensor(s)• Pipe or catheter die• Conveyer belt
Test results:• Testing of the
processability of polymer compounds
• Testing of additives at different formulations
• Testing and optimisation of processing conditions
• small production of polymer pipes
97
557557--3215 Pipe & Tubing Die3215 Pipe & Tubing Die
• di: 5 - 12 mm• da: 10 - 15 mm• Standard: 9 / 12 mm• Max. temperature: 480°C
98
557557--3185 Catheter Die3185 Catheter Die
• di: 1.5 - 7.0 mm• da: 2.0 - 8.0 mm• Standard: 2.4/4.5 mm• Max. temperature: 480°C
99
• Instruments:• PolyLab RC300p• Rheomex extruder (single
or twinscrew)• Screw(s)• Pressure sensor(s)• Rodcapillary or
rod die• Dieswell Capillary• (Conveyer belt)• Laser Dieswell tester
Test results:• Testing the elastic behaviour
of polymer melts• Measuring the strand
diameter
DieswellDieswell MeasurementMeasurement
100
LASERLASER--BEAMBEAM(D)
Capillary (d)
DieswellDieswell MeasurementMeasurement
* 100%Dieswell =
D - d d
detecting elastic polymer behaviour