Multiflex® G 62 A 21 B Z1631 N0052 (A) Thermoplastic Elastomer
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Identification & Functionality
Multiflex® G 62 A 21 B Z1631 N0052 (A) Thermoplastic Elastomer Features & Benefits
Compatibility: PP/PE
Applications & Uses
Multiflex® brand TES Automotive G Range are styrenics thermoplastic elastomers, designed for medium/high compression set applications. Compatibility with polyolefin enables bi-material parts (continuous process or cold insert).
Please find below some indications to follow to transform the product. This does not replace molder experience, every mold having its own specificity, but this is useful for initial parameter choice.
Background
Multiflex® Automotive G Range can be transformed between 190°C to 220 - 230°C. In this temperature range, materials are stable, above, thermal degradation occurs, resulting in yellowing and significant odor emanation.
Pre-drying
As Multiflex® Automotive G Range is not humidity sensitive, Pre-drying is not needed. In case of "incident", predrying at 80 - 90°C during 1 to 2 hours is sufficient.
Machinery cleaning
High flow thermoplastic must be used, PEHD, PELD or PP.
Coloring
Multiflex® Automotive G Range is easily colorable by using color masterbatch based on PP, PE or ethylene copolymers (EVA).
Recycling
Multiflex® Automotive G Range is 100% recyclable without properties loss. We recommend a maximal level of 10% of recycling material in virgin material.
Injection
On a general point of view, viscosity of SEBS based material is principally dependent of applied shear, so Multiflex® Automotive G Range must be injected with high injection speed. Due to their high fluidity, easy mold feeding for single or multiple cavities geometries are possible.
Processing parameters
Screw: Geometry: standard injection machine, L/D > 20, compression rate 2:1 to 3:1 (if higher, risk of thermal degradation). Screw speed between 100 to 150 rpm, ensures thorough melting of the material without excessive temperature generation. Start with 120 rpm.
Back pressure
Must be between 7 and 15 bars. This will ensure a uniform melt without severe shear eating.
Temperatures (°C)
See Figure 1.
Feed Zone: 150 +/- 10
Zone 1: 170 +/- 10
Zone 2: 190 +/- 10
Nozzle: 200 +/- 10
Figure 1: Injection molding processing temperatures
Injection speed
Injection speed and fill time are highly dependent on part geometry, complexity and gate design. Faster speeds typically result in easier mold filling but limits adhesion, while lower speeds result in better surface appearance. High injection speed, around 70% of maximum injection speed should be used initially.
Holding pressure
Start with a pressure equivalent to 30% of maximum injection pressure. Excessive holding pressure can result in distortion in the area of the gate due to elastomeric characteristics of the material.
Holding time
Three seconds can be used to start to ensure sufficient time for gate freeze off. Holding time can be slowly reduced until changes in part appearance or weight occur.
Mold
Use conventional mold design (venting, finish, draft) with temperatures from 10 to 60°C. In the range of 40°C typically gives good results.
Hot Runners
Apply a temperature of 180°C +/- 10
Extrusion
Multiflex® Automotive G Range can be processed on all extrusion machines for PVC, polyolefin. A screw, with a compression ratio of 3 is recommended.
Temperatures (°C)
See Figure 2.
Feed Zone: 150 +/- 10
Zone 1: 170 +/- 10
Zone 2: 180 +/- 10
Die: 190 +/- 10
Figure 2: Extrusion processing temperatures
Properties
Value | Units | Test Method / Conditions | |
Stress (at 100% Elongation) | 1.4 | MPa | ISO 527-1/-2 or ISO 37 |
Stress (at 300% Elongation) | 2.2 | MPa | ISO 527-1/-2 or ISO 37 |
Stress (at Break) | 6.7 | MPa | ISO 527-1/-2 or ISO 37 |
Elongation (at Break) | min. 300 | % | ISO 527-1/-2 or ISO 37 |
Hardness (Shore A, 15s) | 60 | - | ISO 48-4 / ISO 868 |
Compression Set (at 23°C) | 18 | % | ISO 815 |
Compression Set (at 70°C, 24h) | 37 | % | ISO 815 |
Compression Set (at 100°C, 24h) | 63 | % | ISO 815 |
Tear Strength (Parallel) | 26 | kN/m | ISO 34-1 |
Value | Units | Test Method / Conditions | |
Density | 1190 | kg/m³ | ISO 1183 |
Value | Units | Test Method / Conditions | |
Melt Temperature Range | 180 - 200 | °C | - |
Melt Temperature (Optimum) | 190 | °C | - |
Value | Units | Test Method / Conditions | |
Drying Recommended | no | - | - |
Hold Pressure Range | as low as possible | MPa | - |
Back Pressure | 1 | MPa | - |
Melt Temperature (Optimum) | 200 | °C | - |
Mold Temperature (Optimum) | 40 | °C | - |
Mold Temperature (Minimum) | 20 | °C | - |
Mold Temperature (Maximum) | 60 | °C | - |
Value | Units | Test Method / Conditions | |
Flow Length | 680 | mm | - |
Flow Length (Pressure) | 8 | MPa | - |
Regulatory & Compliance
Technical Details & Test Data
This product is neither tested nor represented as suitable for medical or pharmaceutical uses.
Packaging & Availability
Regional Availability
This product is available in a variety of container sizes.
Storage & Handling
Containers should be kept tightly closed and kept in cold storage at all times to extend shelf life. Shelf life is indicated by the Use Before date found on the product label.