China Professional China Over-Molding Si-TPV - Si-TPV 3520-70A durable dynamic vulcanizated thermoplastic silicone-based elastomers – Silike Manufacture and Factory

Professional China Over-Molding Si-TPV - Si-TPV 3520-70A durable dynamic vulcanizated thermoplastic silicone-based elastomers – Silike

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Professional China Over-Molding Si-TPV - Si-TPV 3520-70A durable dynamic vulcanizated thermoplastic silicone-based elastomers – Silike Detail:

DESCRIPTION

SILIKE Si-TPV® thermoplastic elastomer is a patented dynamic vulcanized thermoplastic silicone-based elastomer which made by a special compatible technology to help silicone rubber dispersed in TPU 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.

Si-TPV® 3520-70A thermoplastic elastomer is a material with good abrasion and soft silky feel which can excellent bond to PC,ABS,TPU and similar polar substrates. It is a product developed for silky touch overmolding on wearable electronics, accessory cases for electronic devices,watch bands.

APPLICATIONS

Solution for soft touch over molding on smart phones, portable electronic cases, smartwatch wristband, straps,and other wearable electronic devices.

TYPICAL PROPERTIES

Test*	Property	Unit	Result
ISO 868	Hardness (15 seconds)	Shore A	71
ISO 1183	Specific Gravity	–	1.11
ISO 1133	Melt Flow Index 10 kg & 190°C	g/10 min	48
ISO 37	MOE ( Modulus of elasticity)	MPa	6.4
ISO 37	Tensile Strength	MPa	18
ISO 37	Tensile Stress @ 100% Elongation	MPa	2.9
ISO 37	Elongation at break	%	821
ISO 34	Tear Strength	kN/m	55
ISO 815	Compression Set 22 hours @ 23°C	%	29

*ISO: International Standardization Organization ASTM: American Society for Testing and Materials

FEATURES & BENEFITS

(1) Soft silky feel

(2) Good scratch resistance

(3) Excellent bonding to PC, ABS

(4) Super hydrophobic

(5) Stain resistance

(6) UV stable

HOW TO USE

• Injection Molding Processing Guide

Drying Time	2–6 hrs
Drying Temperature	80–100°C
Feed Zone Temperature	150–180°C
Center Zone Temperature	170–190°C
Front Zone Temperature	180–200°C
Nozzle Temperature	180–200°C
Melt Temperature	200°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.

HANDLING PRECAUTIONS

A desiccant dehumidifying dryer is recommended for all drying.

Product safety information required for safe use is not included in this document. Before handling, read product and safety data sheets and container labels for safe use, physical and health hazard information. the safety data sheet is available on the silike company website at siliketech.com ,or from distributor, or by calling Silike customer service.

USABLE LIFE AND STORAGE

Transport as non-hazardous chemical. Store in a cool , well ventilated place. Original characteristics remain intact for 24 months from the production date , if kept in recommend storage.

PACKAGING INFORMATION

25KG / bag , craft paper bag with PE inner bag.

LIMITATIONS

This product is neither tested nor represented as suitable for medical or pharmaceutical uses.

LIMITED WARRANTY INFORMATION – PLEASE READ CAREFULLY

The information contained herein is offered in good faith and is believed to be accurate. However, because conditions and methods of use of our products are beyond our control, this information should not be used in substitution for customer’s tests to ensure that our products are safe, effective, and fully satisfactory for the intended end use. Suggestions of use shall not be taken as inducements to infringe any patent.