Siemtcoat® SF301 Ultra-low Platinum Solventless Silicone Release Coating

Siemtcoat® SF301L

A Ultra-low Platinum Solventless Silicone Release Coating

Siemtcoat® SF301 is a high-performance solvent-free, 100% solids silicone release coating developed by Topwin, with zero VOC emission. Featuring ultra-low platinum loading and fast curing speed, it is compatible with paper substrates including Glassine, PEK and so on. It is widely applied for labels, adhesive tapes, medical supplies, food packaging and stationery products.

General

• A three-component solventless system, specially designed for Glassine, PEK, ect. substrate coatings.

• We recommend the following formula:

• Siemtcoat® SF301-Base Polymer

• Siemtcoat® 8118-Crosslinker

• Siemtcoat® 5000-Catalyst

  The dosage of different components should be adjusted based on various process conditions and applications. After the components are mixed evenly, the coating on the substrate surface is cured, achieving the target release profile.

Application

Siemtcoat® SF301 is specially designed for Glassine, PEK, ect. substrate coatings. The dosage of each component should be adjusted based on specific process conditions and application requirements. After thoroughly mixing the components, apply the coating to the substrate surface for curing to achieve the target release profile.

Advantage

• Ultra-low platinum loading

• Long bath life and good anchorage performance with additives 

• Low silicone migration

• Suitable for various adhesive systems

Properties

Processing

When applying Siemtcoat® SF301 into the Siemtcoat system, please strictly adhere to the following mixing procedure:

1.  Weigh the base polymer Siemtcoat® SF301---XX parts.
2.  Weighthe crosslinker Siemtcoat® 8118---XX 
3.  Add the weighed crosslinker and thoroughly mix to ensure complete dispersion.
4.  Weigh the catalyst Siemtcoat® 5000---XX parts, and add it during mixing. 
    (Attention: Do not mix the crosslinker and catalyst directly, as a dramatic reaction will occur.)
5.  Continue mixing until the catalyst achieves a uniform distribution throughout the mixture.

For detailed formulation guidance, feel free to contact us.

Bath life

The bath life of all Siemtcoat systems depends on formulation, equipment, mixing process, temperature, and environment. Siemtcoat® SF301 only does not alter its original bath life, typically lasting about 5 hours at 40℃.

Release force

Release force performance depends on multiple factors.

We measure release force using different substrates and adhesives to define its characteristics. While  the  standard  release  force  measure  could  use standard tape to measure.

Typical release force performance:

Tesa Tape 7475 (23℃): 10 to 20 g/25mm (0.3 m/min peeling speed)

Curing

The curing results of the Siemtcoat system depend primarily on the formulation, substrate quality, curing temperature, and oven efficiency. We obtained the following results:

(Curing time is defined as the minimum curing duration without any smear, rub-off, or migration of the release coating layer.)

Package

Shelf-life

Siemtcoat® SF301  should  be  stored  in  a  closed  container  at  -20°C  to  +30°C temperature.

Siemtcoat standard shelf-life is 24 months.

Safety

Please refer to the Siemtcoat® SF301/8118/5000 SDS.  

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