Hytrel® 7246

Alternative und Handelsbezeichungen
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Description

Common features of Hytrel® thermoplastic polyester elastomer include mechanical and physical properties such as exceptional toughness and resilience, high resistance to creep, impact and flex fatigue, flexibility at low temperatures and good retention of properties at elevated temperatures. In addition, it resists many industrial chemicals, oils and solvents. Special grades include heat stabilised, flame retardant, food contact compliant, blow molding and extrusion grades. Concentrates offered include black pigments, UV protection additives, heat stabilisers, and flame retardants.Hytrel® thermoplastic polyester elastomer is plasticiser free.The good melt stability of Hytrel® thermoplastic polyester elastomer normally enables the recycling of properly handled production waste. If recycling is not possible, DuPont recommends, as the preferred option, incineration with energy recovery (-24 kJ/g of base polymer) in appropriately equipped installations.For disposal, local regulations have to be observed.Hytrel® thermoplastic polyester elastomer typically is used in demanding applications in the automotive, fluid power, electrical/electronic, consumer goods, appliance and power tool, sporting goods, furniture, industrial and off-road transportation/equipment industry.Hytrel® 7246 is a high modulus grade with nominal hardness of 72D. It contains non-discoloring stabilizer. It can be processed by many conventional thermoplastic processing techniques like injection molding and extrusion.The 72 Shore D hardness is based on a legacy method and still used for grade identification purposes. Typical applications: Tubing, wire and cable jackets, gears and sprockets, oil field parts.

Equivalent Materials

Diese Materialdaten wurden von Matmatch zur Verfügung gestellt

Alle Daten beziehen sich auf Raumtemperatur soweit nicht anderweitig spezifiziert. SI Einheiten werden verwendt soweit nicht anderweitig spezifiziert.
Äquivalente Standards sind ähnlich zu einem oder mehreren Standards die der Anbieter angegeben hat. Manche äquivalente Standards können strikter sein oder außerhalb der Bedingungen des ursprünglichen Standards.

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Eigenschaften

Allgemein

PropertyTemperatureValueComment

Dichte

23.0 °C

1.26 g/cm³

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ISO 1183

Wasserabsorption

23.0 °C

0.3 %

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Sim. to ISO 62 | Immersion 24h

Mechanisch

PropertyTemperatureValueComment

Biegemodul

23.0 °C

0.55 GPa

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ISO 178

Dehnung

23.0 °C

530 %

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ISO 527-1/-2

Elastizitätsmodul

23.0 °C

0.55 GPa

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ISO 527-1/-2

Elongation at yield

23.0 °C

23 %

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ISO 527-1/-2

Härte, Shore D

23.0 °C

68 [-]

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max., ISO 7619-1

Poissonzahl

23.0 °C

0.47 [-]

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Reißfestigkeit

23.0 °C

182 kN/m

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ISO 34-1

Reißfestigkeit, transversal

23.0 °C

172 kN/m

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ISO 34-1

Schlagfestigkeit, Charpy gekerbt

-40.0 °C

7 kJ/m²

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ISO 179/1eA

-6.0 °C

8 kJ/m²

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ISO 179/1eA

23.0 °C

36 kJ/m²

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ISO 179/1eA

Schlagzähigkeit, Izod ungekerbt

-40.0 °C

7 kJ/m²

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ISO 180/1A

23.0 °C

38 kJ/m²

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ISO 180/1A

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Schubmodule

23.0 °C

0.28 GPa

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ISO 6721

Streckgrenze

23.0 °C

27 MPa

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ISO 527-1/-2

Zugfestigkeit

23.0 °C

50 MPa

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ISO 527-1/-2

Thermisch

PropertyTemperatureValueComment

Brittleness temperature

-97 °C

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ISO 974

Glasübergangstemperatur

25 °C

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ISO 11357-1/-2 | 18°F/min

Heat deflection temperature, 0.45 MPa

100 °C

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ISO 75-1/-2

Heat deflection temperature, 1.80 MPa

50 °C

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ISO 75-1/-2

Koeffizient der thermischen Ausdehnung

23.0 °C

1.2E-4 1/K

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ISO 11359-1/-2 | -40 - 23°C

Relative temperature index, electrical

85 °C

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UL 746B | 60mil

Relative temperature index, mechanical impact

85 °C

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UL 746B | 60mil

Relative temperature index, mechanical strength

75 °C

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UL 746B | 60mil

Schmelzpunkt

218 °C

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ISO 11357-1/-3 | 18°F/min

Spezifische Wärmekapazität

23.0 °C

2150 J/(kg·K)

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of melt

Temperaturleitfähigkeit

23.0 °C

0 mm²/s

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Vicat-Erweichungstemperatur

205 °C

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ISO 306 | 90°F, 2 lbf

thermischer Ausdehnungskoeffizient, transversal

23.0 °C

1.3E-4 1/K

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ISO 11359-1/-2 | -40 - 23°C

Entflammbarkeit

Burning Behav. at 60mil nom. thickn.: HB class, Thickness tested: 1.5 mm, UL recognition: yes -, Oxygen index: 23 %, FMVSS Class: DNI -

Elektrisch

PropertyTemperatureValueComment

Dielektrizitätskonstante, 1 MHz

23.0 °C

3.5 [-]

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IEC 62631-2-1

Dielektrizitätskonstante, 100 Hz

23.0 °C

4 [-]

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IEC 62631-2-1

Dissipation factor, 100Hz

23.0 °C

0.02 [-]

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IEC 62631-2-1

Dissipation factor, 1MHz

23.0 °C

0.03 [-]

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IEC 62631-2-1

Durchschlagfestigkeit

23.0 °C

20 kV/mm

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IEC 60243-1

Kriechstromfestigkeit

23.0 °C

600 V

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IEC 60112

Surface resistivity

23.0 °C

1.00E+15 Ω/sq

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min. | IEC 62631-3-2

Volume resistivity

23.0 °C

2.00E+12 Ω·cm

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IEC 62631-3-1

Rheological Properties

PropertyTemperatureValueComment

Schmelzmassenflussrate

13 g/10min

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ISO 1133 | 240°C/2.16kg

Schmelzvolumenflussrate

12 cm³/10min

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ISO 1133

Schrumpfung

23.0 °C

1.6 %

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ISO 294-4, 2577

Schrumpfung, diagonal

23.0 °C

1.6 %

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ISO 294-4, 2577

Technological properties

Property
Processing methods

Drying Recommended: yes, Drying Temperature: 110°C, Drying Time, Dehumidified Dryer: 2-3h, Processing Moisture Content: ≤0.08%, Melt Temperature Optimum: 245°C, Min. melt temperature: 240°C, Max. melt temperature: 260°C, Mold Temperature Optimum: 45°C, Min. mold temperature: 45°C, Max. mold temperature: 55°C, Hold pressure range: ≤70MPa