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Arnitel® EM400 B-MB

Arnitel® EM400 B-MB is a high-performance thermoplastic copolyester (TPC) known for its exceptional blend of flexibility, high temperature resistance, and strength, complemented by outstanding processing characteristics. In various industries, including automotive and E&E, it is becoming a more sustainable and efficient alternative to traditional rubbers, resulting in reduced environmental impact and lower system costs. This product is suitable for processing through extrusion and injection molding technologies.

Brand: Arnitel (93 products)

Polymer Name: Thermoplastic Copolyester Elastomer (TPC-ET)

Processing Methods: Extrusion, Film Extrusion, Injection Molding

Density: 1110.0 - 1110.0 kg/m³

Strain at Break: 960.0 - 960.0 %

Flexural Modulus: 50.0 - 50.0 MPa

Technical Data Sheet

Enhanced TDS

Knowde-enriched technical product data sheet

Identification & Functionality

Features & Benefits

Applications & Uses

Properties

Mechanical Properties
ValueUnitsTest Method / Conditions
Hardness (3s)33Shore DISO 868
Tensile Modulus40MPaISO 527-1/-2
Stress at Break20MPaISO 527-1/-2
Nominal Strain at Break830%ISO 527-1/-2
Stress at 5% Strain2.3MPaISO 527-1/-2
Stress at 10% Strain3.8MPaISO 527-1/-2
Stress at 50% Strain6.8MPaISO 527-1/-2
Stress at 100% Strain7.5MPaISO 527-1/-2
Charpy Notched Impact Strength (+23°C)NkJ/m²ISO 179/1eA
Charpy Notched Impact Strength (-30°C)NkJ/m²ISO 179/1eA
Izod Notched Impact Strength (+23°C)NkJ/m²ISO 180/1A
Izod Notched Impact Strength (-20°C)NkJ/m²ISO 180/1A
Flexural Modulus50MPaISO 178
Thermal Properties
ValueUnitsTest Method / Conditions
Melting Temperature (10°C/min)195°CISO 11357-1/-3
Coefficient of Linear Thermal Expansion (Parallel)2.2E-4/°CISO 11359-1/-2
Coefficient of Linear Thermal Expansion (Normal)2.2E-4/°CISO 11359-1/-2
Burning Behavior (1.5 mm Nominal Thickness)HBClassIEC 60695-11-10
Thickness Tested1.5mmIEC 60695-11-10
Typical Properties
ValueUnitsTest Method / Conditions
Density1110kg/m³ISO 1183
Apparent Density690kg/m³ISO 60
Water Absorption0.75%Sim. to ISO 62
Humidity Absorption0.3%Sim. to ISO 62
Electrical Properties
ValueUnitsTest Method / Conditions
Relative Permittivity (1 MHz)4-IEC 62631-2-1
Relative Permittivity (1 MHz)4.1-IEC 62631-2-1
Dissipation Factor (100 Hz)10E-4IEC 62631-2-1
Dissipation Factor (1 MHz)170E-4IEC 62631-2-1
Volume Resistivity10000000000000Ohm*mIEC 62631-3-1
Electric Strength20kV/mmIEC 60243-1
Comparative Tracking Index600VIEC 60112
Mechanical Properties (Die Cutting)
ValueUnitsTest Method / Conditions
Stress at Break (Normal)19MPaISO 527-1/-2
Tear Strength (Normal)104kN/mISO 34-1; Method B
Tear Strength (Parallel)106kN/mISO 34-1; Method B
Strain at Break (Normal)960%ISO 527-1/-2
Rheological Properties
ValueUnitsTest Method / Conditions
Melt Volume-Flow Rate33cm³/10minISO 1133
Temperature230°CISO 1133
Load2.16kgISO 1133
Molding Shrinkage (Parallel)1.5%Sim. to ISO 294-4
Molding Shrinkage (Normal)1.5%Sim. to ISO 294-4
Grade Coding for Injection Molding

Arnitel® E, non reinforced and non flame retardant injection molding grades.

Regulatory & Compliance

Certifications & Compliance

Technical Details & Test Data

Temperature Settings for Injection Molding
Mold Temperature

Arnitel® can be used with a wide range of tool temperatures (20 - 50°C / 68 - 122°F). However, to achieve optimal mechanical properties and stable dimensional parts, it is recommended to apply a tooling temperature at the higher side (50°C / 122°F). In case the molded part tends to stick to the mold, a lower mold temperature can contribute to a better part release.

Barrel Temperature

The given temperature settings are general for Arnitel®. Optimal settings are governed by barrel size and residence time. Additionally, a higher hardness and higher melting point of the Arnitel®, requires a barrel temperature at the higher side.

Arnitel® EM400 B-MB - Temperature Settings For Injection Molding

Mold/Tool Measured Melt Nozzle Front Center Rear
20 - 50°C 220-240°C 220-240°C 210-230°C 200-220°C 190-210°C
68 - 122°F 428-464°F 428-464°F 410-446°F 392-428°F 374.-410°F
Melt Temperature

To generate a good and homogeneous melt, the melt temperature should always be above 220°C / 428°F. Optimal mechanical properties will be achieved at melt temperatures between 220-240°C / 428-464°F. We advise to frequently measure the melt temperature by pouring the melt in a Teflon cup and inserting a thermo probe into the melt.

Hot Runner Temperature

A hot runner temperature set to the same level as the nozzle temperature should work fine and not lead to excessive overheat of the Arnitel® grade. When starting up, an increased tip temperature may be necessary to overcome a frozen nozzle.

Viscosity-Shear Rate

Arnitel® EM400 B-MB - Viscosity-Shear Rate

Shear Stress-Shear Rate

Arnitel® EM400 B-MB - Shear Stress-Shear Rate

Machinery for Injection Molding

Arnitel® grades can be processed on general injection molding machines.

Screw Geometry

Typically 3-zone screw designs with volumetric compression ratios of approximately 2.5 work fine.

Steel Type

Abrasive resistant tool steels which are normally used for glass and/or mineral reinforced materials are also to be used for Arnitel® polymers in tools, nozzles and screws.

Nozzle Temperature Control

The use of an open nozzle with good temperature control and an independently-controlled thermocouple nearby the tip and heater bands with sufficient output is recommended.

Hot Runner Layout

Try to achieve a close contact with your hot runner supplier and Envalior as the material supplier, to be sure that the right hot runner system is chosen.

When processing Arnitel™ with hot runners, keep in mind these basic rules:

  • Central bushing heated separately
  • Only use external heated system
  • Manifold heated from both sides
  • Tip with thermocouple in front (near gate)
  • Very accurate temperature control in the gate area
General Processing Settings
Screw Rotation Speed

To realize a good and homogeneous melt, it is advised to set a screw rotation speed resulting in a plasticizing time that is just within the cooling time. The rotational speed of the screw should not exceed 6500 / D RPM (where D is the screw diameter in mm).

Back Pressure

Back pressure should be between 30-100 bars effective. Keep it low in order to prevent nozzle-drooling, excessive shear heating and long plasticizing times.

Decompression

In order to prevent nozzle drool after plasticizing and retracting the nozzle from the mold, a short decompression stroke can be used. However, to prevent oxidation of the melt, which may result in surface defects on the parts, it is recommended to keep this as short as possible.

Injection Speed

Moderate to high injection speeds are required in order to prevent premature crystallization in the mold during injection phase and to obtain a better surface finish. Adequate mold venting is required to avoid burning at the end of the flow path (due to diesel effect).

Injection Pressure

The real injection pressure is the result of the flowability of the material (crystallization rate, flow length, wall thickness, filling speed). The set injection pressure should be high enough to maintain the set injection speed (use set injection pressure higher than the peak pressure if possible). Tooling air vents must be effective to allow optimum filling pressure and prevent burn marks.

Holding Time

Effective holding time is determined by part thickness and gate size. Holding time should be maintained until a constant product weight is achieved.

Holding Pressure

The most adequate holding pressure is the level whereby no sinkmarks or flash are visible. A too high holding pressure can lead to stresses in the part.

Cooling Time

Actual cooling time will depend on part geometry and dimensional quality requirements as well as the tool design (gate size).

Ejection of the Part

In view of Arnitel®'s flexibility (particularly the softer types) specific attention has to be given to the mold release. Furthermore the surface of the ejection pins should be large enough to prevent damage or deformation of the part.

Dynamic Shear Modulus (G)-Temperature

Arnitel® EM400 B-MB - Dynamic Shear Modulus (G)-Temperature

Melt Residence Time

The optimal Melt Residence Time (MRT) for Arnitel® EM400 B-MB is < 5 minutes with preferably at least 50% of the maximal shot volume used. The MRT should not exceed 6 minutes. A formula to estimate the MRT is described below:

𝑀𝑅𝑇 = (∏D³ρ/m) * (t/60)

Whereas:
MRT = Melt Residence Time [minutes]
D = Screw Diameter [cm]
p = Melt Density [g/cm³]
m = Shot Weight [g]
t = Cycle Time [s]

Please Note: In the calculation above, the hotrunner volume has not been taken into account. When a hotrunner is part of the setup, please add the hotrunner volume to the calculation.

Stress-Strain (Isochronous) 23°C

Arnitel® EM400 B-MB - Stress-Strain (Isochronous) 23°C

Creep Modulus-Time

Arnitel® EM400 B-MB - Creep Modulus-Time

Creep Modulus-Time 60°C

Arnitel® EM400 B-MB - Creep Modulus-Time 60°C

Startup/Shutdown/Cleaning for Injection Molding

Production has to be started and stopped with a clean machine. Cleaning can be done with Arnitel® EM400 B-MB, applicable cleaning agents or HDPE. Hot runners can also be cleaned and put out of production cleaning them with Arnitel® EM400 B-MB.

Specific Volume-Temperature (pvT)

Arnitel® EM400 B-MB - Specific Volume-Temperature (Pvt)

Stress-Strain (TPE)

Arnitel® EM400 B-MB - Stress-Strain (Tpe)

Chemical Resistance
Chemical Name Resistance
Acetic acid (10% by mass) at 23°C Resistant
Acetone at 23°C Resistant
Ammonium hydroxide (10% by mass) at 23°C

Limited Resistant, Tests Necessary To Verify

ASTM 1 at 23°C Resistant
ASTM 3 at 23°C Resistant
Brake fluids (DOT 3/4) at 23°C Not Resistant
Calcium chloride (10% by mass) at 23°C

Limited Resistant, Tests Necessary To Verify

Chloroform at 23°C Not Resistant
Diethyl ether at 23°C

Limited Resistant, Tests Necessary To Verify

Ethanol at 23°C

Limited Resistant, Tests Necessary To Verify

Ethyl Acetate at 23°C

Limited Resistant, Tests Necessary To Verify

Fuel; Diesel at 85°C Resistant
Hydrochloric acid (10% by mass) at 23°C Resistant
Hydrogen peroxide (30% by mass) at 23°C

Limited Resistant, Tests Necessary To Verify

Nitric acid (10% by mass) at 23°C Resistant
Phosphoric acid (10% by mass) at 23°C Resistant
Sodium hydroxide (10% by mass) at 23°C Resistant
Sulfuric acid (30% by mass) at 23°C Resistant
Tetrachloroethylene at 23°C

Limited Resistant, Tests Necessary To Verify

Toluene at 23°C Resistant
Transformer oil at 23°C Not Resistant
Trichloroethylene at 23°C Not Resistant
Water at 23°C Resistant
Zinc chloride (10% by mass) at 23°C Resistant
Dynamic Tensile Modulus (E)-Temperature

Arnitel® EM400 B-MB - Dynamic Tensile Modulus (E)-Temperature

Safety & Health

Safety

For the safety properties of the material, we refer to our SDS which can be ordered at our sales offices. During practical operation we advise to wear personal safety protections for hand/eye/body.

Production Breaks

During production breaks longer than a few minutes, we advise emptying the barrel. The temperature of the barrel and the hot runner [if applicable] should be reduced to a level far enough below the melting point of the compound in order to stop decomposition of the compound. When the hot runner, nozzle, or even the screw is blocked, be aware that under these conditions a sudden outburst of molten material can take place. Always wear personal safety protections for hand/eye/body.

Packaging & Availability

Packaging

Arnitel® grades are supplied in airtight, moisture-proof packaging.

Storage & Handling

Material Handling
Storage

In order to prevent moisture pick up and contamination, supplied packaging should be kept closed and undamaged. For the same reason, partial bags should be sealed before re storage. Allow the material that has been stored elsewhere to adapt to the temperature in the processing room while keeping the bag closed.

Moisture Content as Delivered

Arnitel® grades are packaged at a moisture level < 0.05 w%.

Conditioning Before Molding

To prevent moisture condensing on granules, bring cold granules up to ambient temperature in the molding shop while keeping the packaging closed.

Moisture Content Before Molding

Arnitel® is delivered at molding moisture specification (< 0.05 w%). We advise to pre-dry to overcome the fluctuation from package to package (see drying section below). Furthermore, pre-drying is required in case the material is exposed to moisture before molding (prolonged storage or open/damaged packaging). Moisture content can be checked by water evaporation methods or manometric methods (ISO 15512).

Drying

Arnitel® grades are hygroscopic and absorb moisture from the air relatively quickly. Moisture absorption is fully reversible under the following drying conditions without compromising material quality. Preferred driers are dehumidified driers with dew points maintained between -30 and -40°C / -22 and -40°F. Vacuum driers with N, purge can also be used. Hot air ovens or hopper driers are not suitable for pre-drying Arnitel® grades; the use of such driers may result in non-optimum performance.

Moisture Content Time Temperature
[%] [h] [°c] [°F]
<0.05 and as delivered 3-4 100 212
>0.05-0.2 4-6 100 212
Regrind

Regrind can be used taking into account that this regrind must be clean/low dust content/not thermally degraded/dry, of same composition and similar particle size as the original material. The acceptable level of regrind depends on the application requirements (e.g. UL Yellow Card). Be aware that regrind can cause some small color deviations.