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DuPont Hytrel thermoplastic polyester elastomerProduct guide and properties12345 DuPont registered trademarks of E.I. du Pont de Nemours & CompanyDuPont and The miracles of science are trademarks of E.I. du Pont de Nemours & Company

Illustrations of the cover page1 – Gears2 – SCOTT Sun glasses: bridge for lens, rear frame and arms HYTREL ,frame of lens DELRIN 3 – Lens support for SONY CD-player4 – “Energizer” spring for in-line skate5 – Air duct2

ContentsProperties and CharacteristicsPage1. HYTREL thermoplastic polyester elastomer . 3Properties and Characteristics . 3Processing . 3 2. Product Line Description .Specialities .Product Form and Packaging .Product Literature .Applications .566663. Product Selection .End-use Environment .Assembly .Physical Properties .Fluid Resistance .778894. Compositions of HYTREL .Standard Grades .High-Performance Grades .Speciality Grades .Concentrates .Fluid Resistance .Footnotes .10101112131313HYTREL is a thermoplastic polyester elastomer whichcombines many of the most desirable characteristicsof high-performance elastomers and flexible plastics.It features: exceptional toughness and resilience; highresistance to creep, impact and flex fatigue; flexibilityat low temperatures; and good retention of propertiesat elevated temperatures.In addition, it resists many industrial chemicals, oilsand solvents.ProcessingHYTREL can be readily formed into high-performanceparts by a variety of thermoplastic processing techniques, including injection moulding, extrusion, blowmoulding, rotational moulding and melt casting. Forinjection-moulding HYTREL processes at temperaturesbetween 175 C and 260 C depending on the polymertype. All grades have a sharp melting point and verygood melt stability.For additional information relating to processingof HYTREL , see: Injection moulding guide. Extrusion of HYTREL .5. Table of Typical Properties . 14-15RecyclingFor recycling purposes, the international acronymfor DuPont’s thermoplastic polyester elastomerHYTREL is TEEE (thermoplastic elastomer etherester).Hardness of HYTREL HYTREL thermoplastic polyester elastomerHYTREL is DuPont’s registered trademark for its familyof thermoplastic polyester elastomers. HYTREL thermoplastic polyester elastomers are block copolymers,consisting of a hard (crystalline) segment of polybutyleneterephtalate and a soft (amorphous) segment based onlong-chain polyether glycols. Properties are determinedby the ratio of hard to soft segments and by the make-upof the segments.Many HYTREL grades are conveniently classified andnamed according to their nominal values of hardnesson the Shore D scale.However, Shore D Hardness is an imprecise parameterthat may vary substantially according to the nature ofthe specimen measured. Therefore, only typical valuesare given in this brochure.In general, Shore D Hardness relates to more preciselymeasurable and more directly useful parameters likeflexural modulus, low and high temperature stressstrain and impact behaviour and solvents resistance.3

CVJ bootBlow moulded boots are very cost effective comparedto their rubber counterparts, and offer superiorthoughness and resistance to greases, particularlyat low temperatures.Key padThe change to HYTREL from the traditional siliconerubber for keypads of remote control resulted in shorterproduction cycles, increased design flexibility andan agreeable ‘touch’.Head phoneInnovative design featuresthe combination of high flexibilityand mechanical strength.Seal for perfume bottleHYTREL has good chemical and abrasion resistance;more important it is resistant to all chemicals and theodours from the content of the bottle.4

Product line descriptionThere are two main groups of products dependingon the type of soft segment used.These are:1. Standard grades: The most economical grades offerthe best balance of cost and performance. Thesegrades range in Shore D hardness from 35 to 82.2. High Performance grades: These grades providean extra measure of performance and service lifein applications where properties such as abrasionresistance and tear strength are critical. They rangein Shore D hardness from 30 to 72.Within each of these groups a range of hardnessesor flexural modulus is obtained by varying the ratioof hard and soft segments.Available grades in each group are:HardnessFlexural modulus, MPaMultipurposeHigh 117G477455D193-207G55445526 / 5556 / 558663D3006358635672D57072487246104R*120782384056 /40684556* Rockwell RSpecific properties of all these grades can be enhanced through the addition of any of the following concentrates:ConcentrateTypical letdown ratioDescriptionCarbon black40CB and 41CB2,5 to 6%Provides protection against W light exposure.UV light stabilizer20UV2,5 to 4%Provides protection against UV light exposure or ligt-coloured parts.Heat stabilizer30HS5%Retards thermal oxidative degradation anextends useful life at elevated temperatures. Some discolouration, which has noeffect on properties, will occur.Flame retardants51FR and 52FR10–13%Improves flame retardancy to attain UL94V2 rating.For more detailed information on the effects of these concentrates, refer to their individual data sheets.5

In addition, the following special grades are ore D)Flexuralmodulus (MPa)Flame retardantUL94 V0 at 1,57 mm thicknessHTR806846131Blow mouldingHTR5612 BK50124Blow mouldingHTR4275 BK31655160Improved heat ageing performance5555HS55207Product form and packagingApplicationsHYTREL thermoplastic polyester elastomers are suppliedas cylindrical pellets (approximately 3 mm in diameterby 3 mm long), having a bulk density of about 700 kg/m3.They are packaged in 25 kg multiwall paper bags witha moisture barrier inner wall. Palletized units contain40 bags, or 1000 kg net weight, wrapped in polyolefinfilm on disposable wooden pallets.The excellent properties of HYTREL thermoplasticpolyester elastomer qualify it for a number ofdemanding applications where mechanical strengthand durability are required in a flexible component.Most HYTREL grades are also available in 1000 kgbulk boxes with a moisture resistant liner. Check withyour local DuPont representative for details regardingwhich packages are available for the specific grade youneed.Product literatureThis “General guide to products and properties” containsinformation on the complete line of HYTREL products.Additional handling, processing and product informationis available in a variety of other technical literature.Also, tips on designing parts with HYTREL are availablein the “HYTREL Design Handbook” (H-38344). Furtherinformation and copies of the above mentioned literaturecan be obtained from your local DuPont representative.6Examples include seals, belts, bushings, pumpdiaphragms, gears, protective boots, hose and tubing,springs and couplings, hinges, impact and soundabsorbing devices. In many of these applications,HYTREL allows a multipiece rubber, or even metalcomposite assembly to be replaced with a single part.Some of the industries where HYTREL is used include:automotive, fluid power, electrical / electronic, applianceand power tool, sporting goods, furniture and off-roadtransportation / equipment. The potential for usingHYTREL in other industries is limited only by yourimagination.

Product selectionThe following tables offer some general guidelinesto assist you in selecting the most suitable grade ofHYTREL for your specific application. More detailedproduct data is available and should be consulted priorto making your final material selection.For simplicity, the HYTREL products have been groupedinto three hardness ranges. Their ability to meet enduse requirements is indicated by the following codes:very suitablegenerally suitablenot suitableOften, the starting point in selecting the right materialis to consider the end-use environment, to what theapplication will be exposed to (i.e. – temperature,chemicals, etc.).The best heat and chemical resistance is typically provided by the hardest, stiffest HYTREL grades; whereasthe softer, more flexible HYTREL grades, usually provide better performance in low temperature environments.It is important to keep in mind that the part designmust accommodate the mechanical behaviour of thematerial selected based on the environmental conditions. In addition physical properties, methods ofassembly and other criteria all play a part in makingthe best material selection for your application.1. End-use environment :Hardness30D to 40D45D to 55D63D to 82D/104RTemperature: High temperature mechanical properties Standard grades High performance grades63D82D/104R Low temperature flexibility Heat ageing (with 30 HS concentrate)Chemicals:See footnote belowWeathering: With 20 UV and/or 40CB/41CBNote: For more detailed information see page 9 of this brochure or the individual data sheets for the relevant concentrates.7

2. AssemblyHardness30D to 40D45D to 55D63D to 82D/104RHeat weldingHigh frequency weldingUltrasonic weldingSolvent weldingBonding with adhesivesSpin weldingSnap fitOvermoulding(specific grades process recommendations)Contact DuPont representative for grades and processrecommendations3. Physical propertiesHardness30D to 40D45D to 55D63D to 82D/104R63DImpact strength (from –20 to 60 C)Abrasion resistance Standard grades High performance gradesTear strength Standard grades High performance gradesFlexural fatigueCreep882D/104R

4. Fluid resistanceHardness30D to 40D45D to 55D63D to 82D/104RMineral oils and greases, other non-aromatic hydrocarbonsBenzene, toluene, other aromatic hydrocarbons, chemicalsand solventsWater, alcohols, glycols at ambient temperature 50 Cwith 10MSwithout 10MSAcids and bases diluted concentrated9

Grade of HYTREL STANDARD GRADESThese grades offer the best balance of properties and cost.DescriptionCharacteristics1)Typical usesHYTREL G3548LLow modulus moulding andextrusion grade. Containsimproved colour-stableantioxidants and some UVstabilizer.Very flexible grade of HYTREL .Excellent flex-resistance, especiallyat low temperatures. Mouldableeven in thin sections. Can be usedin light-coloured products.Applications requiring flex lifecoupled with good flexibility atlow temperatures.Thin, flexible membranes.Good for high original colour retention.HYTREL G4074Low modulus moulding andextrusion grade. Containsa discolouring antioxidant.Excellent heat-ageing resistanceand resistance to oils at hightemperatures. Best low modulusmoulding and extrusion grade.Tubing.Hose Jackets.Wire and cable jackets.Film sheeting.Moulded products.HYTREL G4078WLow modulus moulding andextrusion grade. Containsimproved colour-stableantioxidants and some UVstabilizer.Like HYTREL G4074, except thatheat-ageing resistance is reduced.Can be used in light-colouredproducts.Applications requiring high originalcolour retention.Moulded and extruded productsfor consumer use.HYTREL G4774Medium-low modulus moulding Excellent heat-ageing resistanceand extrusion grade. Containsand resistance to oils at higha discolouring antioxidant.temperatures. Good resistanceto oils, fuels and solvents.Tubing.Hose jackets.Wire and cable jackets.Profiles.Moulded products.HYTREL G5544Medium modulus mouldingand extrusion grade. Containsa discolouring antioxidant.Excellent heat-ageing resistanceand resistance to oils at hightemperatures.Same as HYTREL G4774.HYTREL 6358Medium modulus mouldingand extrusion grade. Containscolour-stable antioxidants.Excellent heat-ageing resistanceand resistance to oils at hightemperatures.Applications requiring high originalcolour retention.Moulded and extruded productsfor consumer use.HYTREL 7248Medium modulus mouldingand extrusion grade. Containscolour-stable antioxidants.Excellent heat-ageing resistanceand resistance to oils at hightemperatures.Applications requiring high originalcolour retention.Moulded and extruded productsfor consumer use.HYTREL 8238Highest modulus mouldingand extrusion grade. Containscolour-stable antioxidants.Tubing.Highest service temperature.Best resistance to oils, fuels, and Wire and cable jackets.solvents. Lowest fuels permeability. Gears and sprockets.Oil field parts.Electrical connectors.10

HIGH-PERFORMANCE GRADESThese grades provide an extra measure of strength or performance in the most demanding applications, can beused in light-coloured products (except HYTREL 5555HS).DescriptionCharacteristics1)Typical usesHYTREL 4056Low modulus extrusion grade.Contains colour-stable antioxidants.Excellent low-temperatureproperties. Excellent flex-fatigueresistance. Excellent creepresistance.Hose jackets.Wire and cable jackets.Film and sheeting.Belting.Seals.HYTREL 4068Low modulus moulding andextrusion grade. Containscolour-stable antioxidants.Low modulus grade similar toHYTREL 4056, with a highermelting point.Same as HYTREL 4056 Mouldedproducts.HYTREL 4556Medium-low modulus mouldingand extrusion grade. Containscolour-stable antioxidants.Same as HYTREL 4068.Same as HYTREL 4056 Mouldedproducts.HYTREL 5526Medium modulus mouldinggrade. Contains colour-stableantioxidants.Combines the best balance ofproperties of the product line.Seals, packing and gaskets.Gears and bearings.HYTREL 5556Medium modulus extrusiongrade. Contains colour-stableantioxidants.Combines the best balance ofproperties of the product line.Tubing and hose.Wire and cable jackets.Film and sheeting.Belting.HYTREL 6356Medium-high modulus mouldingand extrusion grade. Containscolour-stable antioxidants.Very good resistance to oils,hydraulic fluids and fuels. Verygood resistance to permeationby gases and liquids.Tubing and hose.Film.Profiles.Seals.Gears and sprockets.Fuel tanks.HYTREL 7246High modulus moulding anextrusion grade. Containscolour-stable antioxidants.High service temperature.Retains good low-temperatureflexibility. Excellent resistance tooils, fuels and solvents. Low fuelpermeability.Tubing.Wire and cable jackets.Gears and sprockets.Oil field parts.11

SPECIALITY GRADESDescriptionCharacteristics*Typical usesHYTREL 5555HSHeat-stabilized grade of HYTREL 5556. Contains a discolouringantioxidant.Combine the best balance ofproperties of the product line.Used where increased heatageing stability is required.HTR4275 BK316Medium modulus, high viscositygrades. Contains a discolouringantioxidant. HTR4275 BK ispigmented black. Particularlysuitable for extrusion blowmoulding and extrusion.Good balance of propertiescombined with high viscosityfor extrusion and blow mouldingapplications.Hollow thin-walled parts.Blown film and sheeting.Large diameter tubing.Profiles.Automotive boots, air ductsand covers.HTR5612 BKMedium modulus, high-viscositygrades. Particularly suitable forblow moulding and extrusion.Good balance of propertiescombined with high viscosityfor extrusion and blow mouldingapplications.Blown thin-walled parts.Blown film and sheeting.Large diameter tubing.Profiles.Automotive boots and covers.HTR8068Medium-low modulus mouldingand extrusion grade, flameretarded antidrip compound.Meets requirements of UL94class V0 at 1,6 mm thickness.Tubing and hose.Wire and cable jackets.Film and sheeting.* The characteristics shown are those of the unmodified standard composition. Special stabilizers and additives can be mixed into HYTREL to improve its resistance to ultraviolet light, heat-ageing and moisture.12

CONCENTRATES*These concentrates are in a base of HYTREL 4056.DescriptionCharacteristics1) and typical usesHYTREL 20UVUltravioloet (UV) light stabilizerconcentrate.HYTREL 20UV is used for protection of lightcoloured parts againstUV degradation. Recommended letdown ratio is 25:1 or less.HYTREL 30HSHeat stabilizer concentrate.For blending with other grades of HYTREL to retard thermal oxidativedegradation and extend useful life at elevated temperatures. Recommended letdown ratio is between 16:1 and 40:1, usually about 20:1.HYTREL 40CBHYTREL 41CBConcentrates of a fine particle size HYTREL must be protected against degradation from exposure to UVcarbon black.light when used outdoors or when exposed to sunlight. HYTREL 41CBprovides the most effective protection. Recommended letdown ratiofor direct outdoor exposure is from 20:1 to 9:1.HYTREL 51FRHYTREL 52FRFlame retardant concentrate.For blending with soft (up to 47D: HYTREL 51FR) and hard (from 55D:HYTREL 52FR) grades of HYTREL to improve the flame retardancy asmeasured by the time to flame extinction of the burn rate. Recommended letdown ratio is 10:1.).* All concentrates are supplied in pellet form. They can be dry-blended with pellets of unmodified grades, then melt-mixed in the screw of an extruder or injection moulding machine.Fluid resistanceHYTREL has excellent resistance to non-polar materials, even at elevated temperatures. Polar materials at elevatedtemperatures may have severe effects on HYTREL . In general, fluid resistance of HYTREL improves as the stiffnessof the grade increases.13

Properties of HYTREL thermoplastic polyester elastomer resinsStandard gradesMECHANICALProperty 1)Stress at break (tensile)Strain at break (tensile)Stress at 5% strainStress at 10% strainTensile modulusFlexural modulusTHERMALRHEOL.50 mm/min50 mm/min50 mm/min50 mm/min1 nitsMPa%MPaMPaMPaMPa–40 C23 C100 CIzod impact strength (notched) 2)Melting temperature, by DSCTemperature of deflection under loadVicat softening temperatureASTM–40 C D25623 C Method A10 K/min 3146 C0,45 MPa1,8 MPa10 N 306Melt mass-flow rate1133Temperature/LoadDensityWater absorptionShore hardness DOTHERSTest lSO testconditions methodResistance to flex cut growth,Ross (pierced)1183Saturation, immersed Similarto ISO 62(max. reading) ASTMD224015 s 868ASTMD1052Abrasion resistanceInitial tear resistanceASTMD1044Taber, CS-17 wheelTaber, H-18 wheel2 mm, die C 34G3548LG4074G4078W 11769850183125J/mNo Break 2727144133No Break No Break No Break No Break No Break C75-1/2 C C C15675g/10 min C/kg105,25,31110190/2,16 190/2,16 190/2,16 230/2,16 oints354040475534 106 10634 10643 106 1069193812026088131689426Cyclesto 1065 517510045190500,8 1068 10691161231) All properties were measured on injection-moulded specimens at 23 C, unless specified otherwise.2) Specimens 6,35 mm thick.The values shown are for unmodified grades. Colourants or additives of any kind may alter some or all of these properties. The data listed here fall within the normal range of product properties, but they shouldnot be used to establish specification limits or used alone as the basis of design.All the above information is subject to the disclaimer printed on the back page of this document.14

Standard gradesHigh-performance gradesSpecialty gradesHTRHTR4275 BK 0110180029615024105272073040No Break 2103040No Break No Break No Break 1281704840No Break No Break No Break No Break No Break No Break 210437011090No Break No Break No Break No 2,16 240/2,16 240/2,165,38,58,5187,58,512,5190/2,16 220/2,16 220/2,16 220/2,16 220/2,16 230/2,16 240/2,168,52,0220/2,16 230/5,03,04,6230/2,16 430637282404045555563725555504658687433 10 6 10 640N/A39 10 6 10 6 10 69202533100101158095372116515258685 10 55 10 55 10 53 10 4555 5 10 5 10 5 10 3 10477015866415877717513472005010 5 10 5112158 525 10 4 5 104 6 10 520227163381861452575N/A not applicableAll the above information is subject to the disclaimer printed on the back page of this document.15

For further information on Engineering Polymers contact :Belgique/BelgiëDu Pont de Nemours (Belgium)Antoon Spinoystraat 6B-2800 MechelenTel. (15) 44 14 11Telefax (15) 44 14 09MarocDeborel Maroc S.A.40, boulevard d’Anfa – 10 MA-CasablancaTel. (2) 27 48 75Telefax (2) 26 54 34BulgariaServiced by Biesterfeld Interowa GmbH & Co. KG.See under Österreich.NorgeDistrupol NordicNiels Leuchsvei 99N-1343 EiksmarkaTel. 67 16 69 10Telefax 67 14 02 20C̆eská Republika a Slovenská RepublikaDu Pont CZ, s.r.o.Pekarska 14/268CZ-15500 Praha 5 – JinoniceTel. (2) 57 41 41 11Telefax (2) 57 41 41 50-51DanmarkDu Pont Danmark A/SSkjøtevej 26P.O. Box 3000DK-2770 KastrupTel. 32 47 98 00Telefax 32 47 98 05DeutschlandDu Pont de Nemours (Deutschland) GmbHDuPont Straße 1D-61343 Bad HomburgTel. (06172) 87 0Telefax (06172) 87 27 01EgyptDu Pont Products S.A.Bldg no. 6, Land #7, Block 1New MaadiET-CairoTel. (00202) 754 65 80Telefax (00202) 516 87 81EspañaDu Pont Ibérica S.A.Edificio L’IllaAvda. Diagonal 561E-08029 BarcelonaTel. (3) 227 60 00Telefax (3) 227 62 00FranceDu Pont de Nemours (France) S.A.137, rue de l’UniversitéF-75334 Paris Cedex 07Tel. 01 45 50 65 50Telefax 01 47 53 09 67HellasRavago Plastics Hellas ABEE8, Zakythou Str.GR-15232 HalandriTel. (01) 681 93 60Telefax (01) 681 06 36IsraëlGadotChemical Terminals (1985) Ltd.22, Shalom Aleichem StreetIL-633 43 Tel AvivTel. (3) 528 62 62Telefax (3) 528 21 17ItaliaDu Pont de Nemours Italiana S.r.L.Via Volta, 16I-20093 Cologno MonzeseTel. (02) 25 30 21Telefax (02) 25 30 23 06MagyarországServiced by Biesterfeld Interowa GmbH & Co. KG.See under Österreich.Internet location : http ://plastics.dupont.comUkraineDu Pont de Nemours International S.A.Representative Office3, Glazunova StreetKyiv 252042Tel. (044) 294 96 33/269 13 02Telefax (044) 269 11 81ÖsterreichBiesterfeld Interowa GmbH & Co. KGBräuhausgasse 3-5P.O. Box 19AT-1051 WienTel. (01) 512 35 71-0Fax (01) 512 35 71-31e-mail: info@interowa.atinternet: www.interowa.atAsia PacificDu Pont Kabushiki KaishaArco Tower8-1, Shimomeguro 1-chomeMeguro-ku, Tokyo 153-0064Tel. (03) 5434-6935Telefax (03) 5434-6965PortugalACENYLRua do Campo Alegre, 672 – 1 P-4100 PortoTel. (2) 69 24 25/69 26 64Telefax (2) 600 02 07RomaniaServiced by Biesterfeld Interowa GmbH & Co. KG.See under Österreich.RussiaE.I. du Pont de Nemours & Co. Inc.Representative OfficeB. Palashevsky Pereulok 13/2SU-103 104 MoskvaTel. (095) 797 22 00Telefax (095) 797 22 01SlovenijaServiced by Biesterfeld Interowa GmbH & Co. KG.See under Österreich.TürkiyeDu Pont Products S.A.Turkish Branch OfficeSakir Kesebir cad. Plaza 4No 36/7, BalmumcuTR-80700 IstanbulTel. (212) 275 33 82Telefax (212) 211 66 38H-23287 11.01 Registered trademarks of E.I. du Pont de Nemours & CompanyPrinted in SwitzerlandSouth AfricaPlastamid (Pty) Ltd.43 Coleman StreetP.O. Box 59Elsies River 7480Cape TownTel. (21) 592 12 00Telefax (21) 592 14 09USADuPont Engineering PolymersBarley Mill Plaza, Building #22P.O. Box 80022Wilmington, Delaware 19880Tel. (302) 999 45 92Telefax (302) 892 07 37Schweiz/Suisse/SvizzeraDolder AGImmengasse 9Postfach 14695CH-4004 BaselTel. (061) 326 66 00Telefax (061) 322 47 81Internet: www.dolder.comSverigeDu Pont Sverige ABBox 23SE-164 93 Kista (Stockholm)Tel. (8) 750 40 20Telefax (8) 750 97 97ArgentinaDu Pont Argentina S.A.Avda. Mitre y Calle 5(1884) Berazategui-Bs.As.Tel. 54-11-4229-3468Telefax 54-11-4229-3117BrasilDu Pont do Brasil S.A.Al. Itapecuru, 506 Alphaville06454-080 Barueri-São PauloTel. (5511) 7266 8229PolskaDu Pont Poland Sp. z o.o.ul. Prosta 69PL-00-838 WarszawaTel. (022) 691 09 01Telefax (022) 691 09 10Suomi/FinlandDu Pont Suomi OyBox 62FIN-02131 EspooTel. (9) 72 56 61 00Telefax (9) 72 56 61 66United KingdomDu Pont (U.K.) LimitedMaylands AvenueGB-Hemel HempsteadHerts. HP2 7DPTel. (01442) 34 65 00Telefax (01442) 24 94 63Requests for further information from countriesnot listed above should be sent to:Du Pont de Nemours International S.A.2, chemin du PavillonCH-1218 Le Grand-Saconnex/GenevaTel. (022) 717 51 11Telefax (022) 717 52 00The information provided in this documentation corresponds to our knowledge on the subject at the date of itspublication. This information may be subject to revision asnew knowledge and experience becomes available. Thedata provided fall within the normal range of product properties and relate only to the specific material designated;these data may not be valid for such material used in combination with any other materials or additives or in anyprocess, unless expressly indicated otherwise. The data provided should not be used to establish specification limits norused alone as the basis of design; they are not intendedto substitute for any testing you may need to conduct todetermine for yourself the suitability of a specific material foryour particular purposes. Since DuPont cannot anticipate allvariations in actual end-use conditions DuPont makes nowarranties and assumes no liability in connection with anyuse of this information. Nothing in this publication is to beconsidered as a license to operate under or a recommendation to infringe any patent rights.Caution: Do not use this product in medical applicationsinvolving permanent implantation in the human body. Forother medical applications see “ DuPont Medical CautionStatement ”.DuPont and The miracles of science are trademarks of E.I. du Pont de Nemours & Company

Excellent heat-ageing resistance and resistance to oils at high temperatures. Best low modulus moulding and extrusion grade. Like HYTREL G4074, except that heat-ageing resistance is reduced. Can be used in light-coloured products. Excellent heat-ageing resistance and resistance to oils at high temperatures

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