Improved performance and design flexibility

1 Dyneon TFM PTFEI mproved performance and design flexibilityA 3M CompanyInnovation Expands CapabilitiesBecause of its unique properties, polytetrafluoroethylene ( ptfe ) hasbeen used successfully in a wide variety of industrial applications. For some, that would be enough, but not for developed Dyneon TFM PTFEto better meet your design retaining all the provenadvantages of conventional ptfe , it offers some significantly enhanced properties: substantially lower deformationunder load lower permeation due to denserpolymer structure and fewer voids better weldability Improved stress recovery, particularlyat elevated temperatures smoother surface finishes higher transparencyNew applicationsThe enhanced properties of TFM ptfe make it ideal for applications beyond those of conventional ptfe .

2 Additional processing options and greater freedom of design open up entirelynew applications and film produced from compression molded,sintered billets made of Dyneon TFM PTFEand Dyneon ptfe resins. The higher transparencyof TFM ptfe is a distinct advantage vs. conventional ValueThe use of TFM ptfe in seals, gaskets,and components for valves, pumps and manufacturing equipment not only results in Improved properties, but helps extendservice life, increase plant reliability, and ultimately raise profitability by reducing performance , Product Extension:Dyneon ptfe and Dyneon TFM PTFED ramatic effects are often the resultof small changes. That s the differencebetween conventional, unmodifiedPTFE and TFM ptfe . Dyneon TFM PTFEThe molecular structure of Dyneon TFM ptfe incorporates a perfluoropropyl vinyl ether (PPVE)modifier.

3 This is the same chemicalmodifier used in the melt-processablefluorothermoplastic, PFA. However,the modifier content in TFM PTFEis very low (less than 1%). For this reason, Dyneon TFM ptfe canstill be classified as a homopolymerunder ISO 12086. By using the same modifier, we have successfully introduced part of the property profile of PFA into TFM ptfe without losing the typical properties of conventional addition to the inclusion of a smallamount of modifier, the molecularweight of TFM ptfe is reduced by one-fifth compared to that of conventional ptfe . The lower molecularweight results in lower melt viscosityand provides the advantageous properties characteristic of TFM , the relatively low molecularweight of TFM ptfe in comparisonwith conventional ptfe would giverise to an end product with highercrystallinityand hence lower mechanical , theperfluoropropyl vinyl ether (PPVE)modifier in Dyneon TFM ptfe specifically inhibits crystallization,keeping the amorphous-crystallineratio content consistent with that of conventional ptfe and ensuring no loss of mechanical properties.

4 In addition, the modifier ensures better distribution of particles in the amorphous matrix and dramaticallyreduces creep (cold flow). Dyneon TFM ptfe has the sameexcellent chemical resistance andthermal stability as conventional PTFEand is processed by traditional moldingand sintering methods. The lowermelt viscosity of TFM ptfe leads tobetter particle fusion during sintering. As a result, a denser polymer structurewith lower permeability is structure of TFM ptfe = Fluorine= Oxygen= PTFED yneon ptfe consists of extremelylong, linear carbon chains entirelysurrounded by fluorine atoms. Thefluorine atoms sterically shield thecarbon atoms and protect the moleculefrom chemical attack. The high-energycarbon-fluorine bond helps ensure thatthe shielding effect is retained, evenunder extreme service of the very high molecularweight of about 100 million g/mol,terminal groups are extremely rareand chemical attack at these pointsis virtually YOU proven properties of conventional Dyneon ptfe include.

5 Excellent all-around chemical resistance Very wide service temperature range Excellent dielectric properties Extreme resistance to embrittlement or aging Very good non-stick properties Dimensional stability and stress crack resistanceMolecular structure of conventional, unmodified ptfe = Fluorine= Carbon5 Mechanical and automotive engineeringSeals made from Dyneon TFM ptfe compounded with select fillers haveexcellent fuel, lubricant and additiveresistance and help increase can replace conventional materialsand make it possible to use new, more aggressive lubricants and seal processingDyneon TFM ptfe is ideal for corrosion-resistant lining of steel partssuch as valves and pipes having betterbarrier properties than conventional ptfe due to its lower Improved weldability makes itideal for the manufacture of complexcomponents.

6 It is also ideal for gaskets requiring low deformationunder load. Semiconductor industryExtremely high purity, ultra-smoothfinished-part surfaces and good weldability are opening up new opportunities for the design and production of larger parts, such ascarriers for 300 mm wafers and carriers for flat-panel TFM PTFEThe many options available for processing Dyneon TFM ptfe open up new application areas. Processes can be optimized and manufacturedproducts can be Improved in response to practical FeaturesApplication ExamplesChemical processingExceptional chemical & thermal resistancePumpsChemical transfer & storageLow permeabilityValvesReduced deformation under loadDiaphragms & bellowsWeldabilityBall valve seatsHigh creep resistance & dimensional stabilityMolded or extruded sheet liningsExceptionally smooth surfacesSeals& gasketsSpiral-wound high pressure hosesBearingsHigh purity chemical processingAll of the above plus:All of the above plus.

7 Semiconductor manufacturingLow metal ion & extractables contentLarge wafer carriersFood, bio-tech & pharmaceutical processingExcellent cleanabilityMolded equipment componentsUHP (ultra high purity) grades andWet chemical processing equipmentpackaging availableEncapsulated sensorsFDA compliant grades availableFilms for high purity packagingElectrical & electronicsExcellent insulation propertiesMolded & machined insulatorsExcellent dielectric propertiesEquipment componentsVery smooth surfacesCable coatingsLow frictionStatically dissipative grades availableas compoundsUHP (ultra high purity) grades and packaging availableDyneon TFM ptfe is available as a virgin material or as a compound with fillers added. Custom TFM ptfe compounds can be formulated to your process and property requirements for virtually any TFM ptfe Typical Applications7 Dyneon TFM ptfe UHPHigh-purity raw materials are essential to many manufacturers of equipment for the semiconductor, bio-tech, pharmaceutical and ultra-pure chemicals industries.

8 Dyneon TFM ptfe is available inultra high purity (UHP) grades. Finished parts made from Dyneon TFM ptfe UHP have extremely smooth, pore-free surfaces that prevent contaminants from adhering to them and facilitate cleaning. Clean-room processing of Dyneon TFM ptfe UHP is recommended to ensure high purity in finished parts intended for clean-room applications. UHP grades are specially packaged in Dyneon's clean-room-quality manufacturingand packaging TFM ptfe for Ultra High Purity (UHP) ApplicationsCompressed-air diaphragm pump made from Dyneon TFM ptfe UHP for high-puritymanufacturing in the semiconductor of Dyneon ptfe and Dyneon TFM PTFEP ropertyUnitTest MethodDyneon TFM Dyneon 1700 PTFETF 1750 PTFEBulk Densityg/lASTM D 4894-98a420380 Specific Gravityg/ccASTM D D StrengthpsiASTM D 489440004800psiDIN5345564006000 Elongation at Break%ASTM D 4894350450%DIN53455430600 Deformation Under%ASTM D 621 Load, 2175 psi24 hours815100 hours917 Permanent411 Void Content%Dyneon.

9 SO2(@ 23 C)cm3 Based on ASTM D 3985210310 HCl (@ 54 C) m2x d x barfilm thickness 1 mm460640Cl2(@ 54 C)160320 Tensile ModuluspsiASTM D 63894,25087,000 Dielectric StrengthkV/milASTM D 149-95a thickness 100 mTypical values. Not for specification Improved particle coalescence ofDyneon TFM ptfe during sinteringresults in better particle fusion withinmanufactured parts and, therefore,lower permeation. Lower permeationis particularly advantageous for corrosive applications or those applications where ptfe is used as a barrier to protect against or containaggressive chemicals, such as linedsteel pipe, valves assemblies and gaskets used in chemical Improved particle coalescence of Dyneon TFM ptfe duringsintering, based on its lower melt viscosity, also results in a denser polymer structure in the finished denser polymer structure, whichcan be viewed under magnification.

10 Results in smoother machined surfacesof TFM ptfe parts as well as reduced Permeation of Dyneon TFM ptfe VersusConventional PTFEP ermeation* of selected chemicals through a 1 mm thick ptfe skived sheet600400200SO2 HCICI2measuredmeasuredmeasuredat 23oCat 54oCat 54oCDyneon PTFED yneon TFM ptfe *Based on ASTM D 3985 using film thickness of 1 [cm3/m2day bar]Unmodified Dyneon PTFEM odified Dyneon TFM PTFEThe much smoother surface of Dyneon TFM ptfe parts can be clearly seen under the the rougher surface of machinedparts made from conventional films viewed under an optical microscope at 25x magnificationSurface roughness of machined parts at 50x magnification11 Dyneon TFM ptfe : Reduced Creep - ImprovedResistance to Cold FlowCold flow, measured as deformationunder load, is significantly lower forDyneon TFM ptfe than for conventional ptfe .