Si-TPV 2150-35A Thermoplastic Elastomer
describe:
SILIKE Si-TPV 2150-35A thermoplastic elastomer is a dynamic vulcanized thermoplastic silicone-based elastomer which made by a special compatible technology to help silicone rubber dispersed in TPO evenly as a 2~3 micron particles under microscope. Those unique materials combine the strength, toughness and abrasion resistance of any thermoplastic elastomer with desirable properties of silicone: softness, silky feel, UV light and chemicals resistance which can be recycled and reused in traditional manufacturing processes.
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Applications
Si-TPV 2150-35A dynamic vulcanized thermoplastic silicone-based elastomer can excellent bond to TPE and similar polar substrates like PP,PA,PE,PS,etc... It is a product developed for soft touch overmolding on wearable electronics, accessory cases for electronic devices, automotive, high-end TPE, TPE wire industries .....
Key Benefits
- 1. Provide the surface with Unique silky and skin-friendly touch, soft hand feel with good mechanical properties.
- 2. Not contain plasticizer and softening oil, no bleeding / sticky risk, no odors.
- 3. UV stable and chemical resistance with excellent bonding to TPE and similar polar substrates.
- 4. Reduce dust adsorption, oil resistance and less pollute.
- 5. Easy to demould, and easy to handle.
- 6. Durable abrasion resistance & crush resistance&scratch resistance.
- 7. Excellent flexibility and kink resistance.
Characteristics
- Compatibility: SEBS, PP, PE, PS, PET, PC, PMMA, PA
Typical mechanical properties
| Elongation at Break | 541% | ISO 37 |
| Tensile Strength | 2.53 Mpa | ISO 37 |
| Shore A Hardness | 34 | ISO 48-4 |
| Density | 1.03g/cm3 | ISO1183 |
| Tear Strength | 17.27 kN/m | ISO 34-1 |
| Modulus of Elasticity | 1.06 Mpa | |
| MI( 190℃,10KG) | 4.5 | |
| Melt Temperature Optimum | 220 ℃ | |
| Mold Temperature Optimum | 25 ℃ | |
How to use
● Directly injection molding.
● Injection Molding Processing Guide
| Drying Time | 2-4 hrs |
| Drying Temperature | 60-80℃ |
| Feed Zone Temperature | 180-190℃ |
| Center Zone Temperature | 190-200℃ |
| Front Zone Temperature | 200-220℃ |
| Nozzle Temperature | 210-230℃ |
| Melt Temperature | 220℃ |
| Mold Temperature | 20-40℃ |
| Injection Speed | Med |
These process conditions may vary with individual equipment and processes.
● Secondary Processing
As a thermoplastic material, Si-TPV® material can be secondary processed for ordinary products
● Injection Molding Pressure
The holding pressure largely depends on the geometry, thickness and gate location of the product. The holding pressure should be set to a low value at first, and then slowly increase until no related defects are seen in the injection molded product. Due to the elastic properties of the material, excessive holding pressure may cause serious deformation of the gate part of the product.
● Back pressure
It is recommended that the back pressure when the screw is retracted should be 0.7-1.4Mpa, which will not only ensure the uniformity of melt melting, but also ensure that the material is not severely degraded by shear. The recommended screw speed of Si-TPV® is 100-150rpm to ensure the complete melting and plasticization of the material without material degradation caused by shear heating.
Remark:
1. Si-TPV elastomer products can be manufactured using standard thermoplastic manufacturing processes, including overmolding or co-molding with plastic substrates such as PP,PA.
2. The extremely silky feel of Si-TPV elastomer does not require additional processing or coating steps.
3. The process conditions may vary with individual equipment and processes.
4. A desiccant dehumidifying drying is recommended for all drying.
Package:
25KG / bag, craft paper bag with PE inner bag.
Shelf life and storage:
Transport as non-hazardous chemical. Store in a cool and well ventilated place.
Original characteristics remain intact for 12 months from the production date if kept in recommend storage.
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