Hytrel® 6646 NC010

Alternative and trade names
TPC-ET

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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® 6646 is a medium modulus grade with nominal hardness of 66D. It contains non-discoloring stabilizer. It can be processed by many conventional thermoplastic processing techniques like injection molding and extrusion.

This material data has been provided by Matmatch.

"Typical" values were obtained via a literature search. "Predicted" values were imputed via artificial intelligence technology. While we have placed significant efforts in ensuring data accuracy, "typical" and "predicted" data should be considered indicative and verified by appropriate material testing. Please do contact us if additional information on the the predicted data method is required.
All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

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Properties

General

Property	Temperature	Value	Comment
Density	23.0 °C	1.23 g/cm³ Show Material materials with Density of 1.23 g/cm³	ISO 1183
Water absorption	23.0 °C	0.6 % Show Material materials with Water absorption of 0.6 %	Sim. to ISO 62 \| 80mil

Mechanical

Property	Temperature	Value	Comment
Elastic modulus	23.0 °C	0.31 GPa Show Material materials with Elastic modulus of 0.31 GPa	ISO 527-1/-2
Elongation	23.0 °C	380 % Show Material materials with Elongation of 380 %	ISO 527-1/-2
Elongation at yield	23.0 °C	29 % Show Material materials with Elongation at yield of 29 %	ISO 527-1/-2
Hardness, Shore D	23.0 °C	66 [-] Show Material materials with Hardness, Shore D of 66 [-]	max., ISO 7619-1
Impact strength, Charpy notched	-6.0 °C	13 kJ/m² Show Material materials with Impact strength, Charpy notched of 13 kJ/m²	ISO 179/1eA
	23.0 °C	110 kJ/m² Show Material materials with Impact strength, Charpy notched of 110 kJ/m²	ISO 179/1eA

Poisson's ratio	23.0 °C	0.48 [-] Show Material materials with Poisson's ratio of 0.48 [-]
Tensile strength	23.0 °C	35 MPa Show Material materials with Tensile strength of 35 MPa	ISO 527-1/-2
Yield strength	23.0 °C	20 MPa Show Material materials with Yield strength of 20 MPa	ISO 527-1/-2
Impact strength, Charpy unnotched	No Break @ 23°C, ISO 179/1eU

Thermal

Property	Temperature	Value	Comment
Glass transition temperature		0 °C Show Material materials with Glass transition temperature of 0 °C	ISO 11357-1/-2 \| 18°F/min
Heat deflection temperature, 0.45 MPa		87 °C Show Material materials with Heat deflection temperature, 0.45 MPa of 87 °C	ISO 75-1/-2
Heat deflection temperature, 1.80 MPa		45 °C Show Material materials with Heat deflection temperature, 1.80 MPa of 45 °C	ISO 75-1/-2
Melting point		211 °C Show Material materials with Melting point of 211 °C	ISO 11357-1/-3 \| 18°F/min
Specific heat capacity	23.0 °C	2150 J/(kg·K) Show Material materials with Specific heat capacity of 2150 J/(kg·K)	of melt
Thermal diffusivity	23.0 °C	0 mm²/s Show Material materials with Thermal diffusivity of 0 mm²/s
Vicat softening temperature		100 °C Show Material materials with Vicat softening temperature of 100 °C	ISO 306 \| 90°F/h, 11 lbf
Flammability	Burning Behav. at 60mil nom. thickn.: HB class, Thickness tested: 1.5 mm, Burning Behav. at thickness h: HB class, Thickness tested: 3 mm, Oxygen index: 21 %, FMVSS Class: B -, Burning rate, Thickness 1 mm: <80 mm/min

Rheological Properties

Property	Temperature	Value	Comment
Melt mass-flow rate		13 g/10min Show Material materials with Melt mass-flow rate of 13 g/10min	ISO 1133 \| 240°C/2.16kg
Shrinkage	23.0 °C	1.4 % Show Material materials with Shrinkage of 1.4 %	ISO 294-4, 2577
Shrinkage, transverse	23.0 °C	1.4 % Show Material materials with Shrinkage, transverse of 1.4 %	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

Hytrel® 6646 NC010

Description

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Properties