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polyester elastomer Hytrel Product and Properties Guide Benefits of a drive axle boot design in Hytrel ® over the previously used rubber part include: Provides threefold increase in part life on the vehicle Superior resistance to mechanical damage 50% reduction in weight 90% reduction in molding cycle time Due to its excellent resiliency, colorability, flexibility, high flex fatigue resistance, and ease of processing, Hytrel ® engineering thermoplastic elastomer is the material of choice in these mechanical devices for athletic footwear applications. Latches made with Hytrel ® engineering thermoplastic elastomer offer reduced assembly costs, excellent flex fatigue life, chemical resistance, and shock and vibration absorption. Hytrel ® permits a new degree of freedom in designing tough, resilient, shock- and noise-isolating connectors and fasteners with integral hinges, springs, and seals. ®

Hytrel® Product and Properties · PDF filepolyester elastomer Hytrel Product and Properties Guide Benefits of a drive axle boot design in Hytrel® over the previously used rubber

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Page 1: Hytrel® Product and Properties · PDF filepolyester elastomer Hytrel Product and Properties Guide Benefits of a drive axle boot design in Hytrel® over the previously used rubber

polyester elastomerHytrel

Product and Properties Guide

Benefits of a drive axle boot design in Hytrel® overthe previously used rubber part include:

• Provides threefold increase in part life onthe vehicle

• Superior resistance to mechanical damage

• 50% reduction in weight

• 90% reduction in molding cycle time

Due to its excellent resiliency, colorability, flexibility,high flex fatigue resistance, and ease of processing,Hytrel® engineering thermoplastic elastomer is thematerial of choice in these mechanical devices for

athletic footwear applications.

Latches made with Hytrel® engineeringthermoplastic elastomer offer reducedassembly costs, excellent flex fatigue life,chemical resistance, and shock andvibration absorption.

Hytrel® permits a new degree of freedom indesigning tough, resilient, shock- and noise-isolating

connectors and fasteners with integral hinges,springs, and seals.

®

Page 2: Hytrel® Product and Properties · PDF filepolyester elastomer Hytrel Product and Properties Guide Benefits of a drive axle boot design in Hytrel® over the previously used rubber

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Cost is reduced 20% by component integration in this stretch watchband. One molding replaces a300+ piece assembly in metal.

Hytrel® can be molded to simulate the look and feel ofleather as in this cartridge case, while the molder realizesa 50% cost savings versus leather.

A true high-energy dynamic spring is made by the “Tecspak”process* using Hytrel® in an automotive auxiliary ridespring. It can undergo severe deformation repeatedly withoutdeterioration in properties and outperform traditionalvulcanized rubber and microcellular urethane for energyabsorption, ride comfort, and durability.

*“Tecspak” is a patented process developed by Miner Elastomer Products Corp.

Page 3: Hytrel® Product and Properties · PDF filepolyester elastomer Hytrel Product and Properties Guide Benefits of a drive axle boot design in Hytrel® over the previously used rubber

General DescriptionHytrel® is the DuPont registered trademark forits thermoplastic polyester elastomers. Thepolyether-ester block copolymers combine many ofthe most desirable characteristics of high-perfor-mance elastomers and flexible plastics. Hytrel®

offers a unique combination of mechanical, physi-cal, and chemical properties that qualifies it fordemanding applications. The various grades ofHytrel® exhibit a wide range of flexibility/stiffnessand processing capabilities.

Properties and CharacteristicsHytrel® is a thermoplastic polyester elastomer thatcombines many of the most desirable characteristicsof high-performance elastomers and flexibleplastics. It features exceptional toughness andresilience; high resistance to creep, impact, and flexfatigue; flexibility at low temperatures; and goodretention of properties at elevated temperatures. Inaddition, it resists deterioration from many indus-trial chemicals, oils, and solvents.

ProcessingHytrel® can be readily formed into high-perfor-mance products by a variety of thermoplasticprocessing techniques, including injection molding,extrusion, blow molding, rotational molding, andmelt casting. Hytrel® is processed at temperaturesbetween 177 and 260°C (350 and 500°F), depend-ing on the process and polymer type. All standardgrades have a sharp melting point and very goodmelt stability.

CompositionAll grades of Hytrel® are block copolymers consist-ing of a hard (crystalline) segment of polybutyleneterephthalate and a soft (amorphous) segment basedon long-chain polyether glycols. Properties aredetermined by the ratio of hard to soft segments andby the makeup of the segments. Most gradesof Hytrel® do not contain or require additives toenhance their properties, except for specificapplications.

The available grades of Hytrel® are grouped intofour categories by performance:• High-productivity grades exhibit more versatile

processing characteristics, are lowest cost, and aresuitable for most applications;

• High-performance grades provide an extra marginof strength or serviceability for more demandingapplications;

3

• Specialty grades provide special propertiesor processing characteristics for particularapplications;

• Concentrates contain relatively high concentra-tions of specific property-enhancing additives forblending with other grades of Hytrel®.

Product Form and PackagingAll grades of Hytrel® are supplied as cylindrical tooval shaped pellets (approximately 3.2 mm [0.125in] in diameter by 3.2 mm [0.125 in] long), havinga bulk density of about 705 kg/m3 (44 lb/ft3). Theyare packaged in 25 kg (55.1 lb) multiwall paperbags with a moisture barrier inner wall. Palletizedunits contain 40 bags, or 1000 kg (2204 lb) netweight, wrapped in polyolefin film on disposablewooden pallets. Some grades are also available inbulk corrugated cartons with a moisture-proof liner,containing 750 kg (1650 lb) net weight, on adisposable wooden pallet.

Product LiteratureThe product information presented in this guideshould be useful in helping you choose the rightgrade of Hytrel® for your purpose. Additionalhandling, processing, and product information isavailable in a variety of Hytrel® technical literature.Further information can be obtained from yourDuPont representative or on our website athttp://www.dupont.com/enggpolymers/americas.

ApplicationsThe excellent properties of Hytrel® qualify it for anumber of demanding applications where mechani-cal strength and durability are required in a flexiblecomponent. Examples include seals, belts, bush-ings, pump diaphragms, gears, protective boots,hose and tubing, springs, and impact-absorbingdevices. In many of these applications, Hytrel®

allows a multipiece rubber, plastic, or even metalcomposite assembly to be replaced with a singlepart. For outdoor applications, Hytrel® should beprotected from ultraviolet (UV) attack.

Some of the industries where Hytrel® can alreadybe found include: automotive, fluid power, electri-cal/electronic, appliance and power tool, sportinggoods, footwear, wire and cable (including fiberoptics), furniture, and off-road transportationequipment. The potential for using Hytrel® in otherindustries is limited only by one’s imagination.

Page 4: Hytrel® Product and Properties · PDF filepolyester elastomer Hytrel Product and Properties Guide Benefits of a drive axle boot design in Hytrel® over the previously used rubber

Typical Uses

Applications requiring flex lifecoupled with good flexibility atlow temperatures. Thin,flexible membranes. Good forhigh original color retention.

TubingHose jacketsWire and cable jacketsFilm sheetingMolded products

Applications requiring highoriginal color retention.Molded and extrudedproducts for consumer use.

TubingHose jacketsWire and cable jacketsProfilesMolded products

TubingMolded and extrudedproducts for consumer use.

Same as Hytrel® G4774.

Characteristics*

Very flexible grade of Hytrel®.Excellent flex resistance,especially at low temperatures.Moldable even in thin sections.Can be used in light-coloredproducts.

Excellent heat-aging resistanceand resistance to oils at hightemperatures. Best low modulusmolding and extrusion grade.

Like Hytrel® G4074, except thatheat-aging resistance isreduced. Can be used in light-colored products.

Excellent heat-aging resistanceand resistance to oils at hightemperatures. Good resistanceto oils, fuels, and solvents.

Good balance of low and hightemperature properties.

Excellent heat-aging resistanceand resistance to oils at hightemperatures.

Hytrel® G3548L

Hytrel® G4074

Hytrel® G4078W

Hytrel® G4774

Hytrel® G4778

Hytrel® G5544

Product Line Description of Hytrel®

Description

Low modulus molding andextrusion grade. Containsimproved color-stableantioxidants.

Low modulus molding andextrusion grade. Contains adiscoloring antioxidant.

Low modulus molding andextrusion grade. Containsimproved color-stableantioxidants.

Medium-low modulus moldingand extrusion grade. Containsa discoloring antioxidant.

Medium-low modulus moldingand extrusion grade. Containscolor-stable antioxidants.

Medium modulus molding andextrusion grade. Contains adiscoloring antioxidant.

The above demonstrates a new product concept. The part is extruded as a web-reinforced spring and then cut at intervals so it can be bent. Theresultant product provides the stiffness of a high-pressure inflated tire,but does not require air and cannot go flat.

General Purpose Grades These grades offer the best balance of properties and cost.

* The characteristics shown are those of the unmodified standard composition. Special stabilizers and additives can be mixed with Hytrel® to improve its resistance to UVlight, heat aging, and moisture.

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Page 5: Hytrel® Product and Properties · PDF filepolyester elastomer Hytrel Product and Properties Guide Benefits of a drive axle boot design in Hytrel® over the previously used rubber

These grades provide an extra measure of strength or serviceabilityin the most demanding applications and can be used in light-coloredproducts.

Description

Low modulus extrusion grade.Contains color-stableantioxidants. Not recom-mended for molding.

Low modulus molding andextrusion grade. Containscolor-stable antioxidants.

Medium-low modulus moldingand extrusion grade. Containscolor-stable antioxidants.

Medium modulus moldinggrade. Contains color-stableantioxidants.

Medium modulus molding andextrusion grade. Containscolor-stable antioxidants.

Medium-high modulusmolding and extrusion grade.Contains color-stableantioxidants.

High modulus molding andextrusion grade. Containscolor-stable antioxidants.

Highest modulus molding andextrusion grade. Containscolor-stable antioxidants.

Typical Uses

Hose jacketsWire and cable jacketsFilm and sheetingBeltingSeals

Same as Hytrel® 4056 andmolded products.

Same as Hytrel® 4056 andmolded products.

Seals, packing, and gasketsGears and bearings

Tubing and hoseWire and cable jacketsFilm and sheetingBelting

Tubing and hoseFilmProfilesSealsGears and sprocketsFuel tanks

TubingWire and cable jacketsGears and sprocketsOil field parts

TubingWire and cable jacketsGears and sprocketsOil field partsElectrical connectors

Hytrel® 4056

Hytrel® 4069

Hytrel® 4556

Hytrel® 5526

Hytrel® 5556

Hytrel® 6356

Hytrel® 7246

Hytrel® 8238

Characteristics*

Excellent low-temperatureproperties. Excellent flex-fatigue resistance. Excellentcreep resistance.

Low modulus grade similar toHytrel® 4056 with a highermelting point.

Same as Hytrel® 4069.

Combine the best balance ofproperties of the product line.

Very good resistance to oils,hydraulic fluids, and fuels.Very good resistance topermeation by gases andliquids.

High service temperature.Retains good low-temperatureflexibility. Excellent resistanceto oils, fuels, and solvents. Lowfuel permeability.

Highest service temperature.Best resistance to oils, fuels,and solvents. Lowest fuelpermeability.

High-Performance Grades

(continued)

* The characteristics shown are those of the unmodified standard composition. Special stabilizers and additives can be mixed with Hytrel® to improve its resistance to UVlight, heat aging, and moisture.

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Page 6: Hytrel® Product and Properties · PDF filepolyester elastomer Hytrel Product and Properties Guide Benefits of a drive axle boot design in Hytrel® over the previously used rubber

Specialty Grades

Description

Very low modulus molding andextrusion grade. Containscolor-stable antioxidants.

Pigmented black. Particularlysuitable for extrusion blowmolding and extrusion.

Heat-stabilized grade ofHytrel® 5556. Contains adiscoloring antioxidant.

Pigmented black. Particularlysuitable for extrusion blowmolding and extrusion.

Medium-low modulus grade.Contains color-stableantioxidants.

Medium-low modulus moldingand extrusion grade. Flameretarded antidrip compound.

Medium modulus, highviscosity grade, pigmentedblack. Particularly suitable forextrusion and injection blowmolding.

Characteristics*

Most flexible grade of Hytrel®

with good strength andtoughness over a widetemperature range.

Good balance of propertiescombined with high viscosityfor extrusion and blowmolding applications.

Combine the best balance ofproperties of the product line.

Good balance of propertiescombined with high viscosityfor extrusion and blowmolding applications.

Low permeability to oils, fuels,and plasticizers—approxi-mately one-third that of othergrades of similar stiffness.High clarity in thin films.

Meets requirements ofUL-94 class V-0 at 1.57 mm(1/16 in) thickness.

Excellent flex fatigueresistance and excellentperformance at low tempera-ture. Formulated for improvedsurface lubricity.

Typical Uses

Applications requiring flexlife coupled with goodflexibility at low tem-peratures. Thin, flexiblemembranes.

Hollow thin-walled partsBlow film and sheetingLarge diameter tubingHose mandrelsProfilesAutomotive boots, coversand ducts

Tubing and hoseWire and cable jacketsFilm and sheetingBeltingUsed where increasedheat-aging stability isrequired.

Hollow thin-walled partsBlow film and sheetingLarge diameter tubingHose mandrelsProfilesAutomotive boots andcovers

Applications requiring goodflexibility coupled with lowpermeability to fuels, oils,and plasticizers. Coextrud-able barrier membrane overmore permeable substrates.

Tubing and hoseWire and cable jacketsFilm and sheeting

Hollow thin-walled partsBlow film and sheetingLarge diameter tubingProfilesAutomotive boots andcovers

Hytrel® 3078

Hytrel® HTR4275BK

Hytrel® 5555HS

Hytrel® HTR5612BK

Hytrel® HTR6108

Hytrel® HTR8068

Hytrel® HTR8139LV

Compositions of Hytrel® (continued)

* The characteristics shown are those of the unmodified standard composition. Special stabilizers and additives can be mixed with Hytrel® to improve its resistance to UVlight, heat aging, and moisture.

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Page 7: Hytrel® Product and Properties · PDF filepolyester elastomer Hytrel Product and Properties Guide Benefits of a drive axle boot design in Hytrel® over the previously used rubber

Description Characteristics and Typical Uses

Hytrel® 10MS Hydrolytic stabilizer concentrate For blending with other grades of Hytrel® to improve serviceabilityin hot, moist environments. Recommended let-down ratio is 9:1.

Hytrel® 20UV UV light stabilizer concentrate Used for protection of light-colored parts against UV degradation.Recommended let-down ratio is 25:1 or less.

Hytrel® 30HS Heat stabilizer concentrate For blending with other grades of Hytrel® to retard thermaloxidative degradation and extend useful life at elevated tempera-tures. Recommended let-down ratio is between 16:1 and 40:1,usually about 20:1.

Hytrel® 40CB Concentrate of a fine particle size Hytrel® must be protected against degradation from exposure tocarbon black UV light when used outdoors or when exposed to sunlight.

Hytrel® 40CB provides the most effective protection. Recommendedlet-down ratio for direct outdoor exposure is 7:1.

Hytrel® 51FR Flame retardant concentrate For blending with soft grades of Hytrel® to improve the flameretardancy as in the time to extinguish or in the extent of burning.Recommended let-down ratio is 10:1. 5IFR shows good thermal/heat stability.

Hytrel® 52FR Flame retardant concentrate For blending with grades of Hytrel® of 55D hardness and above, toimprove the flame retardancy as in the time to extinguish or in theextent of burning. Recommended let-down ratio is 10:1. Showsgood heat stability.

Concentrates of Hytrel®

Concentrates* These concentrates are in a base of Hytrel®.

* 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 moldingmachine.

Fluid Resistance

Hardness

35D–40D 45D–55D 63D–104R

Mineral oils and greases, othernonaromatic hydrocarbons

Benzene, toluene, other aromatichydrocarbons, chemicals, and solvents

Water, alcohols, glycols

• Ambient temperature

• >50°C (>122°F) with 10MS

without 10MS

Acids and bases

• Diluted

• Concentrated

Very suitable

Generally suitable

Not suitable

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Page 8: Hytrel® Product and Properties · PDF filepolyester elastomer Hytrel Product and Properties Guide Benefits of a drive axle boot design in Hytrel® over the previously used rubber

Typical Properties of Hytrel® (S.I. Units)

Propertya ASTM ISO Unit G3548L G4074 G4078W G4774 G4778 G5544

Hardness, durometer D D 2240 868 35 40 40 47 47 55

Flexural Modulusd D 790 178at –40°C MPa 62 207 166 320 320 850

23°C MPa 32.4 65.5 65.5 117 117 193100°C MPa 7 33 16 69 69 125

Tensile Stress at Breake D 638 R527 MPa 10.3 13.8 17 20.7 20.7 31

Elongation at Breake D 638 R527 % 200 230 310 275 300 375

Tensile Stress at 5% Straine D 638 R527 MPa 1.7 2.4 3.0 3.8 5.0 6.0

Tensile Stress at 10% Straine D 638 R527 MPa 2.6 3.8 4.5 6.0 7.0 10.5

Izod Impact (notched)f D 256 R180at –40°C Method A J/m No Break 27 27 144 165 133

23°C J/m No Break No Break No Break No Break No Break No Break

Resistance to Flex Cut Growth, D 1052 — cycles >1 x 106 >1 x 106 >1 x 106 >1 x 106 >1 x 106 8 x 105

Ross (pierced) to 5x cutgrowth

Initial Tear Resistance,g Die C D 1004 34 kN/m 51 81 88 94 91 123

Melt Flow Rate D 1238 1133 g/10 min 10 5.2 5.3 11 13 10Test Conditions: Temperature, °C

at 2.16 kg load 190 190 190 230 230 230

Melting Pointh D 3418 3146 °C 156 170 170 208 208 215

Vicat Softening Point D 1525 306 °C 77 112 119 174 175 196Rate B

Deflection Temperature D 648 75under Flexural Load

at 0.5 MPa °C 42 50 50 72 80 111at 1.8 MPa °C 32 N/A N/A 45 46 51

Specific Gravity D 792 R1183 — 1.15 1.18 1.18 1.20 1.20 1.22

Water Absorption, 24 hr D 570 62 % 5 2.1 3 2.5 2.3 1.5

Abrasion Resistance at 1 kg load D 1044 — mg/1000(Modified) rev

Taber, CS-17 Wheel 30 9 20 13 12 9Taber, H-18 Wheel 310 193 260 168 162 116

Method IProcedure BST

IFFN

ESS

THER

MA

L

General Purpose GradescTest Methodsb

TOU

GH

NES

SST

RESS

/STR

AIN

MIS

CELL

AN

EOU

S

a All properties were measured on injection-molded specimens at 23°C (73°F) unlessspecified otherwise. The values shown are for unmodified grades. Colorants oradditives of any kind may alter some or all of these properties. The data listed herefall within the normal range of product properties, but they should not be used toestablish specification limits or used alone as the basis of design.

b All of the values reported in this table are based on ASTM methods. ISO methodsmay produce different test results due to differences in test specimen dimensionsand/or test procedures.

c The High-Productivity and High-Performance grades of Hytrel® are namedaccording to the following product key: first two digits: Hardness durometer D (ingeneral, the greater the hardness, the stiffer the polymer); third digit: A measure ofinherent viscosity; fourth digit: Type of antioxidant: 0–5 Discoloring, 6–9 Non-discoloring; Letter suffix: Special functions or colors.

d Crosshead speed 12.5 mm/min (0.5 in/min).e ASTM Type IV dumbbells diecut from injection molded slab 2 mm (0.079 in) thick.

Head speed 50 mm/min (2 in/min).f Specimens 6.35 mm (0.25 in) thick.g Specimens 2 mm (0.079 in) thick.h Differential Scanning Calorimeter (DSC), peak of endotherm.i Hardness, Rockwell R.

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Page 9: Hytrel® Product and Properties · PDF filepolyester elastomer Hytrel Product and Properties Guide Benefits of a drive axle boot design in Hytrel® over the previously used rubber

4056 4069 4556 5526 5556 6356 7246 8238 3078 HTR4275BK 5555HS HTR5612BK HTR6108 HTR8068 HTR8139LV

40 40 45 55 55 63 72 82 30 55 55 50 60 46 46(104) i

155 172 230 760 760 1,800 2,410 3,030 145 910 760 510 2,010 650 22062 55 94 207 207 330 570 1,210 28 160 207 124 193 174 9527 28 44 110 110 150 207 255 14 59 110 46 60 50 45

28 27.6 31 40 40 41 45.8 48.3 26.2 40 40 36 38.6 12.4 34

550 600 600 500 500 420 360 350 700 450 500 530 400 340 600

2.4 2.4 4.1 6.9 6.9 12 14 27.6 1.3 7.6 6.9 5.5 7.6 3.9 4.5

3.6 3.5 5.7 10.3 10.3 16 20 30.3 2.1 10.3 10.3 8.3 9.6 5.2 6.3

No Break No Break No Break 128 170 48 40 30 No Break 70 43 110 20 90 No BreakNo Break No Break No Break No Break No Break No Break 210 40 No Break No Break No Break No Break No Break No Break No Break

>1 x 106 >1 x 106 >1 x 106 5 x 105 5 x 105 5 x 105 3 x 104 N/A >1 x 106 5 x 104 1 x 105 6 x 105 6 x 105 — >1 x 106

101 95 116 158 158 175 200 253 77 163 158 145 150 75 123

5.3 8.5 8.5 18 7.5 8.5 12.5 12.5 5.0 1.8 8.5 3.0 5.2 4.6 3.3

190 220 220 220 220 230 240 240 190 230 220 230 190 190 230

150 193 193 203 203 211 218 223 170 196 203 196 168 169 192

108 134 158 180 180 195 207 212 83 174 180 155 148 110 161

54 55 60 90 90 115 130 140 46 68 90 62 50 — 68N/A N/A 43 49 49 51 52 55 N/A 45 49 44 42 — 46

1.17 1.11 1.14 1.20 1.20 1.22 1.25 1.28 1.07 1.16 1.20 1.16 1.24 1.43 1.15

0.6 0.7 0.6 0.5 0.5 0.3 0.3 0.3 0.8 0.5 0.7 0.4 0.2 1.9 0.7

3 15 3 7 6 7 13 9 2 20 — 38 9 25 4100 80 72 70 64 77 47 20 90 227 112 186 116 — 65

High-Performance Gradesc Specialty Grades

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Page 10: Hytrel® Product and Properties · PDF filepolyester elastomer Hytrel Product and Properties Guide Benefits of a drive axle boot design in Hytrel® over the previously used rubber

Typical Properties of Hytrel® (English Units)

Propertya ASTM ISO Unit G3548L G4074 G4078W G4774 G4778 G5544

Hardness, durometer D D 2240 868 35 40 40 47 47 55

Flexural Modulusd D 790 178at –40°F psi 9,000 30,000 24,000 47,000 47,000 123,000

73°F psi 4,700 9,500 9,500 17,000 17,000 28,000212°F psi 1,010 4,750 2,320 10,000 10,000 18,000

Tensile Stress at Breake D 638 R527 psi 1,490 2,000 2,460 3,000 3,000 4,500

Elongation at Breake D 638 R527 % 200 230 310 275 300 375

Tensile Stress at 5% Straine D 638 R527 psi 240 350 440 550 670 875

Tensile Stress at 10% Straine D 638 R527 psi 380 550 650 875 980 1,520

Izod Impact (notched)f D 256 R180at –40°F Method A ft⋅lbf/in No Break 0.5 0.5 2.7 3.1 2.5

73°F ft⋅lbf/in No Break No Break No Break No Break No Break No Break

Resistance to Flex Cut Growth, D 1052 — cycles >1 x 106 >1 x 106 >1 x 106 >1 x 106 >1 x 106 8 x 105

Ross (pierced) to 5x cutgrowth

Initial Tear Resistance,g Die C D 1004 34 lbf/in 290 460 500 535 520 700

Melt Flow Rate D 1238 1133 g/10 min 10 5.2 5.3 11 13 10Test Conditions: Temperature, °F

at 2.16 kg load 374 374 374 446 446 446

Melting Pointh D 3418 3146 °F 312 338 338 406 406 419

Vicat Softening Point D 1525 306 °F 171 233 246 345 347 385Rate B

Deflection Temperature D 648 75under Flexural Load

at 66 psi °F 108 122 122 162 176 232at 264 psi °F 90 N/A N/A 113 115 124

Specific Gravity D 792 R1183 — 1.15 1.18 1.18 1.20 1.20 1.22

Water Absorption, 24 hr D 570 62 % 5 2.1 3 2.5 2.3 1.5

Abrasion Resistance at 1 kg load D 1044 — mg/1000(Modified) rev

Taber, CS-17 Wheel 30 9 20 13 12 9Taber, H-18 Wheel 310 193 260 168 162 116

Method IProcedure BST

IFFN

ESS

THER

MA

L

General Purpose GradescTest Methodsb

TOU

GH

NES

SST

RESS

/STR

AIN

MIS

CELL

AN

EOU

S

a All properties were measured on injection-molded specimens at 23°C (73°F) unlessspecified otherwise. The values shown are for unmodified grades. Colorants oradditives of any kind may alter some or all of these properties. The data listed herefall within the normal range of product properties, but they should not be used toestablish specification limits or used alone as the basis of design.

b All of the values reported in this table are based on ASTM methods. ISO methodsmay produce different test results due to differences in test specimen dimensionsand/or test procedures.

c The High-Productivity and High-Performance grades of Hytrel® are namedaccording to the following product key: first two digits: Hardness durometer D (ingeneral, the greater the hardness, the stiffer the polymer); third digit: A measure ofinherent viscosity; fourth digit: Type of antioxidant: 0–5 Discoloring, 6–9 Non-discoloring; Letter suffix: Special functions or colors.

d Crosshead speed 12.5 mm/min (0.5 in/min).e ASTM Type IV dumbbells diecut from injection molded slab 2 mm (0.079 in) thick.

Head speed 50 mm/min (2 in/min).f Specimens 6.35 mm (0.25 in) thick.g Specimens 2 mm (0.079 in) thick.h Differential Scanning Calorimeter (DSC), peak of endotherm.i Hardness, Rockwell R.

10

Page 11: Hytrel® Product and Properties · PDF filepolyester elastomer Hytrel Product and Properties Guide Benefits of a drive axle boot design in Hytrel® over the previously used rubber

4056 4069 4556 5526 5556 6356 7246 8238 3078 HTR4275BK 5555HS HTR5612BK HTR6108 HTR8068 HTR8139LV

40 40 45 55 55 63 72 82 30 55 55 50 60 46 46(104) i

22,500 25,000 33,000 110,000 110,000 260,000 350,000 440,000 21,000 132,000 110,000 74,000 292,000 93,700 31,9009,000 8,000 14,000 30,000 30,000 48,000 83,000 175,000 4,000 23,200 30,000 18,000 28,000 25,200 13,7803,900 4,060 6,400 16,000 16,000 22,000 30,000 37,000 2,030 8,550 16,000 6,700 8,700 7,300 6,530

4,050 4,000 4,500 5,800 5,800 5,950 6,650 7,000 3,800 5,800 5,800 5,230 5,600 1,800 4,930

550 600 600 500 500 420 360 350 700 450 500 530 400 340 600

350 350 600 1,000 1,000 1,740 2,030 4,000 190 1,100 1,000 800 1,100 570 650

525 510 830 1,500 1,500 2,320 2,900 4,400 300 1,500 1,500 1,200 1,400 750 910

No Break No Break No Break 2.4 3.2 0.9 0.8 0.5 No Break 1.4 0.8 2.1 0.4 1.7 No BreakNo Break No Break No Break No Break No Break No Break 3.9 0.8 No Break No Break No Break No Break No Break No Break No Break

>1 x 106 >1 x 106 >1 x 106 5 x 105 5 x 105 5 x 105 3 x 104 N/A 1 x 106 5 x 104 1 x 105 6 x 105 6 x 105 — >1 x 106

580 550 660 900 900 1,000 1,150 1,440 440 930 900 830 855 430 700

5.3 8.5 8.5 18 7.5 8.5 12.5 12.5 5.0 1.8 8.5 3.0 5.2 4.6 3.3

374 428 428 428 428 446 464 464 374 446 428 446 374 374 446

302 379 379 397 397 412 424 433 338 385 397 385 334 336 378

226 273 316 356 356 383 405 414 181 345 356 311 298 230 322

129 131 140 194 194 239 266 284 115 154 194 144 122 — 154N/A N/A 110 120 120 124 126 131 N/A 113 120 111 108 — 115

1.17 1.11 1.14 1.20 1.20 1.22 1.25 1.28 1.07 1.16 1.20 1.16 1.24 1.43 1.15

0.6 0.7 0.6 0.5 0.5 0.3 0.3 0.3 0.8 0.5 0.7 0.4 0.2 1.9 0.7

3 15 3 7 6 7 13 9 2 20 — 38 9 25 4100 80 72 70 64 77 47 20 90 227 112 186 116 — 65

High-Performance Gradesc Specialty Grades

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Page 12: Hytrel® Product and Properties · PDF filepolyester elastomer Hytrel Product and Properties Guide Benefits of a drive axle boot design in Hytrel® over the previously used rubber

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AutomotiveDuPont Engineering PolymersAutomotive Products950 Stephenson HighwayTroy, MI 48007-7013(248) 583-8000

Asia PacificDuPont Asia Pacific Ltd.P.O. Box TST 98851Tsim Sha TsuiKowloon, Hong Kong852-3-734-5345

CanadaDuPont Canada, Inc.DuPont Engineering PolymersP.O. Box 2200Streetsville, MississaugaOntario, Canada L5M 2H3(905) 821-5953

EuropeDuPont de Nemours Int’l S.A.2, chemin du PavillonP.O. Box 50CH-1218 Le Grand-SaconnexGeneva, SwitzerlandTel.: ##41 22 7175111Telefax: ##41 22 7175200

JapanDuPont Kabushiki KaishaArco Tower8-1, Shimomeguro 1-chomeMeguro-ku, Tokyo 153Japan(011) 81-3-5434-6100

MexicoDuPont S.A. de C.V.Homero 206Col. Chapultepec Morales11570 Mexico D.F.(011 525) 722-1456

South AmericaDuPont America do SulAl. Itapecuru, 506Alphaville—CEP: 06454-080Barueri—São Paulo, BrasilTel.: (055-11) 7266-8182Fax: (055-11) 7266-8513Telex: (055-11) 71414 PONT BR

DuPont Argentina S.A.Avda.Mitre y Calle 5(1884) Berazategui-Bs.As.Tel.: (541) 319-4484/85/86Fax: (541) 319-4417

The data listed here fall within the normal range of properties, but they should not be used to establish specification limits nor used alone as the basis ofdesign. The DuPont Company assumes no obligations or liability for any advice furnished or for any results obtained with respect to this information.All such advice is given and accepted at the buyer’s risk. The disclosure of information herein is not a license to operate under, or a recommendation toinfringe, any patent of DuPont or others. DuPont warrants that the use or sale of any material that is described herein and is offered for sale by DuPontdoes not infringe any patent covering the material itself, but does not warrant against infringement by reason of the use thereof in combination with othermaterials or in the operation of any process.

CAUTION: Do not use in medical applications involving permanent implantation in the human body. For other medical applications, see “DuPontMedical Caution Statement,” H-50102.

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