Siemtcoat® SF370

Siemtcoat® SF370
Silicone Release Coating for PET Coating

Siemtcoat® SF370 stands as a cutting-edge, solventless silicone release coating, expertly engineered for high-performance application on polyester (PET) film. It delivers premium release force and superior anchorage performance. This innovative coating dramatically minimizes release layer residues and significantly reduces equipment cleaning frequency. Furthermore, its solvent-free formulation delivers substantial ecological benefits, firmly establishing it as the ideal solution for demanding manufacturing processes.

General

A three-component solventless system, specially designed for PET etc. substrate coatings.
We recommend the following formula:

• Siemtcoat® SF370-Base Polymer
• Siemtcoat® 8158-Crosslinker
• Siemtcoat® 5000-Catalyst

Application

Siemtcoat® SF370 is specially designed for PET etc. 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

• Stable peeling force
• Long bath life
• Good anchorage performance specially for PET film
• Low silicone migration
• Suitable for various types of adhesive systems
  
  

Properties

Processing

When applying Siemtcoat® SF370 into the Siemtcoat system, please strictly adhere to the following mixing procedure:

• 1. Weigh the base polymer Siemtcoat® SF370---XX parts.
• 2. Weight anchorage additive such as Siemtcoat®ADD5176---XX parts.
• 3. Add the weighed anchorage additiver and thoroughly mix to ensure complete dispersion.
• 4. Weighthe crosslinker Siemtcoat® 8158---XXparts.
• 5. Add the weighed crosslinker and thoroughly mix to ensure complete dispersion.
• 6. 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.)
• 7. 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® SF370 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℃): 5 to 15 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® SF370 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® SF370/8158/5000 MSDS.  
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