China TPO based Skin-friendly thermoplastic elastomer Si-TPV 2150-55A Manufacture and Factory

TPO based Skin-friendly thermoplastic elastomer Si-TPV 2150-55A

SILIKE Si-TPV® 2150-55A 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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Description

Si-TPV® 2150-55A 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 ......

Typical mechanical properties

Test item	Property	Unit	Result
ISO 37	Elongation at Break	%	590
ISO 37	Tensile Streng	Mpa	6.7
ISO 48-4	Shore A Hardness	Shore A	55
ISO1183	Density	g/cm3	1.1
ISO 34-1	Tear Strength	kN/m	31
--	Modulus of Elasticity	Mpa	4.32
--	MI( 190℃,10KG)	g/10 min	13
--	Melt Temperature Optimum	℃	220
--	Mold Temperature Optimum	℃	25

Characteristics

Compatibility SEBS, PP, PE, PS, PET, PC, PMMA, PA

Benefits

1. Provide the surface with Unique silky and skin-friendly touch, soft hand feeling 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.

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How to use

Directly injection molding.

• Injection Molding Processing Guide

Drying Time	2–4 hrs
Drying Temperature	60–80°C
Feed Zone Temperature	180–190°C
Center Zone Temperature	190–200°C
Front Zone Temperature	200–220°C
Nozzle Temperature	210–230°C
Melt Temperature	220°C
Mold Temperature	20–40°C
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.