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6414-VIC-HT-Flyer.qxd09.10.200716:00 UhrSeite 1VICTREX PEEK-HTTM polymer is the unique high performance material developed for applications that demand superior higher temperature resistance. With a glass transition temperature of 157 C anda melting temperature of 374 C, VICTREX PEEK-HTTM delivers extended high temperature performance, while offering all the key characteristics of natural VICTREX PEEKTM, including toughness,strength and chemical resistance.Across a wide range of demanding industrial, automotive and aerospace applications, VICTREX PEEK-HTTM offers manufacturers a premium material which is a more cost-effective, lightweight alternativeto metals. From engine compartment applications to sub sea connectors and heat exchanger parts, this advanced engineering materialprovides unlimited design freedom, high precision reproducibility andlong-term productreliability.KEY FEATURES Superior high temperature performance- Retention of mechanical and physical properties totemperatures 30 C higher than standard VICTREX PEEKTM.- Up to 3 times the wear resistance of standardVICTREX 450G at high temperatures.- Excellent long-term creep and fatigue resistance over awide temperature range.- Substantially higher tensile strength and flexuralmodulus at 250 C. Improved compressive strength Exceptional resistance to chemicals, solvents and fuels Inherent low flammability, low smoke emission Good electrical propertiesPEEK-HTTM PROVIDES LONG-TERM RELIABILITY ATELEVATED TEMPERATURESGreene, Tweed & Co. chose VICTREX PEEK-HTTM for itsSeal-Connect 8 pin connector. Designed to withstandthe high temperatures generated in oil field explorationand production, VICTREX PEEK-HTTM provides the neededlongterm reliability at elevated temperatures after prolonged exposure to an applied pressure of 138 MPa at204 C.VICTREX PEEK-HTTM also allows short-term exposure topressures of 172 MPa at 260 C. The VICTREX PEEK-HTTMconnector has eliminated product failure caused byassembly and secondary operations. Excellent hydrolysis resistance Consistent ease of processing Available in powder or pelletsFor superior high temperature performance
6414-VIC-HT-Flyer.qxd09.10.200716:00 UhrSeite 2VICTREX PEEK-HTTM.INJECTION MOLDING GUIDELINES FOR VICTREX PEEK-HTTM POLYMERVICTREX PEEK-HTTM polymer is commonly regarded as the highestperformance material capable of being processed on conventionalthermoplastic equipment. It is supplied as pellets, coarse powder andfine powder. Pellets are recommended for injection molding, extrusion, monofilament and wire coating operations.serious effect on molding quality due to the high temperatures required to process VICTREX PEEK-HTTM. Re-work should be restricted toa maximum of 30% w/w for unfilled polymer and 10% w/w forcompounds.PurgingHandlingVICTREX PEEK-HTTM is supplied in a sealed polyethylene bag inside aheavy-duty cardboard box. We strongly recommend keeping thematerial sealed inside the original packaging during transportationand storage. When material is required, the boxes should be openedin a clean environment and care taken to avoid contamination. Anyremaining material should be resealed in the bag and box as soon aspossible and stored in a dry place.VICTREX PEEK-HTTM and compounds should be processed on completely clean equipment. This is best done by removing the screw andbarrel. If this is not possible, purging is essential. Commercially available purging compounds are acceptable for removing material fromthe machine prior to introducing VICTREX PEEK-HTTM. However, thepurging compound needs to be stable at temperatures above 370 Cso that it does not break down when the VICTREX PEEK-HTTM isintroduced. Purging compounds are also effective at removing theVICTREX PEEK-HTTM from the machine after processing.DryingFor best results, powder and pellets should be dried to less than0.02% w/w moisture (dew point of -40 ). This can be done by placingthe material in an air-circulating oven for a minimum of 3 hours at150 C or 2 hours at 160 C, or in a vacuum oven for at least 4 hoursat 120 C. The material should be spread evenly in clean shallow trays,in layers about 2.5 cm deep. Materials can be left to dry overnight.Care should be taken not to introduce sources of contamina-tion.Re-WorkVICTREX PEEK-HTTM can be reground and added to virgin material toimprove production efficiency. However, the level of re-work canaffect the quality of the moldings and increase the chances of crosscontamination. Even at low levels, extraneous materials can have aPlease contact your Victrex Representative for more information onpurging compounds.Materials of ConstructionMachine wear is common with all engineering thermoplastics andcan be especially severe when processing fiber filled materials. Tominimize wear, screws, dies and barrels should be hardened. Themost common way to harden tool steel is to coat with nitride. Thistechnique provides the surface hardness necessary to resist extremeabrasion. However, care must be taken to ensure that the VICTREX PEEK-HTTM does not cool and solidify in contact with the nitridecoating (or any other coating). The bond between the polymer andthe nitride coating is often strong enough to lift the layer from thesteel substrate.Figure 1: Creep Modulus of VICTREX PEEK-HTTM at 230 C and150 C (strain 0.1%, time 100s)Figure 2: Yield Strength of VICTREX PEEK-HTTM and VICTREX 450GWhile the creep modulus of VICTREX PEEK-HTTM and VICTREX 450G are very similar at room temperature, VICTREX PEEK-HTTM hasa creep modulus more than twice that of VICTREX 450G at 150 C.This means that VICTREX PEEK-HTTM can support higher loads thanVICTREX 450G at 150 C without permanent deformation.The temperature resistance of VICTREX PEEK-HTTM allows it to be usedan average of 25 C hotter than VICTREX 450G at the same tensilestress without permanently yielding.2VICTREX PEEK-HTTM Polymers
6414-VIC-HT-Flyer.qxd09.10.200716:00 UhrSeite 3Steels such as D2, Wexco 777, CPM 9V and H13 are suitable for usein process equipment for VICTREX PEEK-HTTM. Avoid using copperalloys because they can cause degradation at VICTREX PEEK-HTTMprocessing temperatures.duction along the screw and barrel to the hopper may reduce feedefficiency. Water-cooling will help control the feedthroat temperature, but care should be taken to maintain the rear zone temperature.Barrel CapacityThe surface finish of metallic components used in transporting VICTREX PEEK-HTTM melt should be smooth and highly polished. Increasing thesurface roughness of these components causes the melt to adherelocally to the metal, which increases the residence time and disruptspolymer flow.Machine DesignVICTREX PEEK-HTTM can be processed on most standard reciprocating screw injection molding machines. We do not recommend usingplunger-type molding machines.Barrel TemperaturesIn order to successfully mold VICTREX PEEK-HTTM, the cylinder heaters must be capable of maintaining 450 C. However, VICTREX PEEK-HTTM has a low melt viscosity and normally only needs to beprocessed at temperatures 10-30 C above the melting point. Barreland cylinder temperatures are typically run in the range of 385410 C. Most injection molding machines are capable of operating atthese temperatures without modification, but it is a simple processto install higher temperature range controllers and ceramic heaterbands.Residence time should be kept to a minimum due to the high processing temperatures of VICTREX PEEK-HTTM. Ideally, the barrel capacity should be between 2 and 5 times the total shot weight includingthe sprue and runners. If it is necessary to mold VICTREX PEEK-HTTMon a machine with a very high number of shots in the barrel, reducethe rear zone temperatures 10 to 20 C below the recommendedtemperature settings.Nozzles and Shut-off SystemsThe nozzle of the barrel is in contact with the sprue bushing for ahigh percentage of the total cycle time during normal molding operations. The temperature of the sprue bushing is considerably lowerthan that of the melt and the nozzle. VICTREX PEEK-HTTM has a sharpmelting point and will solidify quickly if the melt temperature in thenozzle is allowed to fall below 375 C. Therefore, it is important toensure that an adequately large heater is fitted to the nozzle to prevent freeze-off and forming a cold slug. Extended nozzles are notrecommended because they increase the likelihood of solidificationin the nozzle. Running sprue break with cold sprue bushings isrecommended to keep prevent the nozzle from freezing off.In order for the pellets to feed properly from the hopper, the feedthroat temperature should be between 70 and 100 C. Thermal con-Within the recommended processing temperatures, the viscosity ofVICTREX PEEK-HTTM is generally high enough to allow the use of anopen nozzle system. Shut-off nozzles are not recommended due toFigure 3: Fatigue Properties of VICTREX PEEK-HTTM and VICTREX 450G at 23 C and 0.5 HzFigure 4: Melt Temperature and Glass TransitionTemperature ofVICTREX PEEK-HTTM and VICTREX 450GThe molecular structure and semi-crystalline nature of VICTREX PEEK-HTTM results in much better resistance to fatigue than VICTREX 450G at high levels of stress.The molecular structure and semi-crystalline nature of VICTREX PEEK-HTTM results in a melting point (Tm) 30 C higher and a glass transition temperature (Tg) 14 C higher than VICTREX 450G.VICTREX PEEK-HTTM Polymers3
6414-VIC-HT-Flyer.qxd09.10.200716:00 UhrSeite 4.for superior high temperature performancepotential “dead spots” and restricted injection pressures. If excessivedie drool is encountered, minor melt decompression (suck-back) canbe used in the process cycle.melt to adhere locally to the metal, which increases the residencetime and disrupts polymer flow.Screw Design and SpeedHeated sprue bushings have been used successfully and can helptransport a higher volume of material into a cavity before they freeze off. They keep heat flowing into the material closer to the moldcavity and can aid in keeping thick section free of porosity. With theuse of a hot sprue bushing, running sprue break is not necessary.Processing will be more stable without sprue break.Injection and Clamping PressuresThe injection pressure required to correctly mold parts will be systemdependant. However, injection pressures rarely exceed 13.6 MPa(usually 6.8-13.6 MPa) with secondary holding pressures less than10.2 MPa (usually 3.4-10.2). Back pressure should be nominal(approximately 0.34 MPa) to create a homogenous melt and consistent shot size.The surface area of the part and runner determine the clamp forcerequired to prevent the mold from opening under maximum injection pressure. This typically corresponds to 50-80 MPa (3.6-5.8 Tons)for unfilled VICTREX PEEK-HTTM and 65-140 MPa (4.7-10 Tons) forreinforced compounds. However, parts with thin sections and longflow lengths will require higher clamping pressures than those withthick sections and short flow lengths.Most general-purpose screws are suitable for processing VICTREX PEEK-HTTM. The minimum recommended L/D is 16:1, but preferably inthe range of 18:1 to 24:1. Long feed sections are required to preventcompaction of unmelted pellets in the compression zone of thescrew. The compression ratio should be between 2:1 and 3:1.The screw tip must utilize a check ring to ensure the development offull and sustained injection pressure. Ring clearance should allow foran unrestricted flow of material during the forward movement of thescrew. This typically corresponds to a 3 mm clearance from the screwtip diameter for a medium-sized molding machine.Screw speed should be 50-100 rpm. Speeds below 50 rpm can resultin long cycle times while speeds above 100 rpm can cause excessivelocalized shear heating. Low speeds (50-60 rpm) are recommendedfor filled grades to minimize fiber attrition.The surface finish of metallic components used in trans-portingVICTREX PEEK-HTTM melt should be smooth and highly polished.Increasing the surface roughness of these components causes theFigure 5: Wear Properties of VICTREX PEEK-HTTM and VICTREX 450G at 23 C (ASTM D3702 thrustwasher geometry)Figure 6: Heat Deflection Temperature of VICTREX PEEK-HTTM andVICTREX 450G (unfilled) Compared to VICTREX PEEK-HTTM22GL30 and VICTREX 450GL30 (30%Glass Fibre Reinforced)In thrust waster tests performed under different PV conditions,VICTREX PEEK-HTTM exhibited as little as 1/3 the wear of VICTREX 450G. VICTREX PEEK-HTTM showed a lower specific wear rate thanVICTREX 450G under all other test conditions.The Heat Deflection Temperature of VICTREX PEEK-HTTM is 13 C higher than VICTREX 450G. When reinforced with 30% glass fiber, theHDT is 30 C higher than any currently available thermoplastic.VICTREX PEEK-HTTM Polymers4
6414-VIC-HT-Flyer.qxd09.10.200716:00 UhrSeite 5Mold TemperatureHeated molds are required to allow VICTREX PEEK-HTTM to crystallizeand achieve its best properties. Electric and oil heating have bothbeen used successfully, but oilheating gives more consistent temperature control. Oil and electric cartridges can also be used in combination where tool design requires additional heating.Mold surface temperatures should be a minimum of 180 C to allowcrystallization. This typically corresponds to an oil heater temperature of at least 230 C. To obtain ideal levels of crystallinity, the moldsurface temperature should be between 190 to 215 C, but can berun higher depending on part geometry, mold design and desiredcrystallinity.Operating TemperaturesRearZone CMiddleZone CFrontZone CNozzleZone 2CA30382388393400GradeLow mold temperatures will yield parts with high levels of internalstress and will have visibly dark, semi-transparent amber edges andcorners that indicate low levels of crystallinity. Obtaining the fullmechanical properties of VICTREX PEEK-HTTM will not be possible with low levels of crystallinity due to the low mold temperature. Processing VICTREX PEEK-HTTM on a hot tool isnecessary. The material crystallinity can be enhanced and stress canbe reduced with heat treatment, but this can also cause distortion.VICTREX PEEK-HTTM Polymers5
6414-VIC-HT-Flyer.qxd09.10.200716:00 UhrSeite 6www.victrex.comvictrex.mobiFlammabilityWorld HeadquartersVictrex plcHillhouse InternationalThornton CleveleysLancashire FY5 4QDUnited KingdomTel: (44) 1253 897700Fax: (44) 1253 897701Email: [email protected] METHODUNITSVICTREX PEEK-HTTMVICTREX G22GL30VICTREX G22CA30ISO 1183g 53.349.818.2265344374157350374157ISO 527-2/1B/50ISO 527-2/1B/50ISO 527-2/1B/50ISO 178ISO 178ASTM D695ASTM D785DSCDSCISO 75IEC 112IEC 112IEC 250IEC 93UL 94AmericasVictrex USA Inc300 Conshohocken State RoadSuite 120West Conshohocken, PA19428USATel: (1) 800-VICTREXTel: (1) 484-342-6001Fax: (1) 484-342-6002Email: [email protected] C C CV1016 Ω -cm4.9V-0 @ 1.6 mmEuropeVictrex Europa GmbHHauptstr. 1165719 Hofheim/Ts.GermanyTel: (49) 6192 96490Fax: (49) 6192 964948Email: [email protected] PacificVictrex Japan IncHanai Building 6F1-2-9 Shiba-KouenMinato-kuTokyo 105-0011JapanTel: (81) 35777 8737Fax: (81) 35777 8738Email: [email protected] PacificVictrex High PerformanceMaterials (Shanghai) Co LtdPart B Building G1688 Zhuanxing RoadXinzhuang Industry ParkShanghai 201108ChinaTel: (86) 21-6113 6900Fax: (86) 21-6113 6901Email: [email protected] plc believes that the information contained in this brochure is an accurate description of the typical characteristics and/or uses of the product or products, butit is the customer's responsibility to thoroughly test the product in each specific application to determine its performance, efficacy and safety for each end-use product,device or other application. Suggestions of uses should not be taken as inducements to infringe any particular patent. The information and data contained herein arebased on information we believe reliable. Mention of a product in this documentation is not a guarantee of availability. Victrex plc reserves the right to modify products,specifications and/or packaging as part of a continuous program of product development. Victrex is a registered trademark of Victrex Manufacturing Limited. PEEKTM,PEEK-HT , T-SeriesTM, MAX-SeriesTM and APTIVTM are trademarks of Victrex plc. VICOTE is a registered trademark of Victrex plc.Victrex plc makes no warranties, express or implied, including, without limitation, a warranty of fitness for a particular purpose or of intellectual property noninfringement, including, but not limited to patent non-infringement, which are expressly disclaimed, whether express or implied, in fact or by law. Further, Victrex plcmakes no warranty to your customers or agents, and has not authorized anyone to make any representation or warranty other than as provided above. Victrex plc shallin no event be liable for any general, indirect, special, consequential, punitive, incidental or similar damages, including without limitation, damages for harm to business,lost profits or lost savings, even if Victrex has been advised of the possibility of such damages, regardless of the form of action. Victrex Eur 707/000PROPERTYDensity (crystalline)Typical CrystallinityTensile Strength23 C150 C250 CTensile Elongation (Break, 23 C)Secant Modulus 23 CFlexural Modulus23 C150 CFlexural Strength 23 CCompressive Strength 23 CRockwell Hardness (R scale)Melting Point (peak of endotherm)Glass Transition Temperature (Tg)Heat Deflection Temp. @ 1.8 MPaComparative Tracking Index 23 CLoss Tangent 23 C 1MHzRelative Permittivity50 Hz 0-150 C50 Hz 200 CVolume Resistivity
Steels such as D2, Wexco 777, CPM 9V and H13 are suitable for use in process equipment for VICTREX PEEK-HTTM. Avoid using copper alloys because they can cause degradation at VICTREX PEEK-HTTM processing temperatures. The surface finish of metallic components used in transporting VICTREX
