Siemtcoat® EM5502

Siemtcoat® EM5502

Emulsion Silicone Release Coating Tailored for Food and Sanitary Materials Industries

 Siemtcoat® EM5502 is an advanced two-component emulsion-based system, specifically formulated to deliver superior performance in paper coating applications. As a secure and eco-conscious water-based silicone release agent, its formulation is expertly engineered to satisfy the rigorous demands of the food and sanitary materials industries, guaranteeing adherence to stringent safety and hygiene regulations. Whether used in food packaging, hygiene products, or other related applications, Siemtcoat® EM5502 stands out as a reliable and highly effective solution, elevating the quality and performance of paper-based materials to new heights.

General

• A two-component emulsion-based system, specially designed for food paper, PET, ect. substrate coatings.
• We recommend the following formulas:
• Siemtcoat® EM5502-Base Polymer
• Siemtcoat® EM5509-Catalyst

Application

Siemtcoat® EM5502 is specially designed for food paper, PET, 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

The emulsion-based system silicone release agent is suitable for various coating machines, especially suitable for direct coating on paper machines or solvent-based release agent coating equipment for coating processing, thereby conveniently replacing solvent-based products, with the following characteristics:

• Fast curing
• Suitable for in-line and off-line coating
• Good bath stability
• Good anchorage performance to different papers and films
• Low peeling force

Properties

Processing

When applying Siemtcoat® EM5502 into the Siemtcoat system, please strictly adhere to the following mixing procedure:

• Weigh the base polymer Siemtcoat® EM5502---XX parts.
• Add the water, mix thoroughly to ensure the solids content >XX%.
• Weigh the catalyst Siemtcoat® EM5509---XX parts, and add it during mixing.
• Continue mixing until the catalyst achieves a uniform distribution throughout the mixture.

For detailed formulation guidance, feel free to contact us. 

Precautions: When opening the lid of the Emulsion main polymer, observe whether there is any swelling or gas buildup.

If no gas expansion is observed, it is recommended to wear anti-static clothing, discharge static electricity before operation, open the cover with a metal tool, and then slowly open the vent valve using an explosion-proof drum opener. After opening the vent valve, leave the area and wait for a few minutes to allow residual hydrogen gas inside the drum to escape. Then proceed with the sampling operation.

In case of barrel expansion, first move the barrel to an open outdoor area, perform static electricity elimination on the barrel shell, and then follow the previous operational procedure.

The detail information could consult us for the formulation advice.

Bath life

The bath life of all Siemtcoat systems depends on formulation, equipment, mixing process, temperature, and environment. Siemtcoat® EM5502 only does not alter its original bath life, typically lasting about 6 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.)

Operational Precautions

Siemtcoat® EM5502 releases hydrogen gas slowly. The rate of hydrogen release will accelerate under the action of a catalyst, or if it is contaminated by alkaline substances,  heavy  metals  or  their  compounds.  Do  not  place  the  emulsion  in  a container without ventilation openings.

Keep Siemtcoat®  EM5502 away from sparks and open flames, and ensure good ventilation in the use area. Avoid contact with skin and eyes. To prevent pressure accumulation during hydrogen release, it is recommended to ventilate the containers holding the base emulsion regularly. In this way, no pressure will build up even if the container's ventilation openings are blocked.

Pre-use Inspection & Barrel Opening Operation

First check the barrel for bulging before any operation.

If  no  bulging   is  observed:  Wear  anti-static  clothing  and  discharge  static electricity prior to operation; open the cover with metal tools, then slowly open the breather valve  with  an  explosion-proof barrel  opener.  Step  away  from  the  barrel immediately after opening the valve and wait a few minutes for the small amount of residual hydrogen inside to escape, then conduct sampling operations.

If bulging occurs: First move the barrel to an open outdoor area, eliminate static electricity on the barrel’s outer surface, then follow the above barrel opening procedure.

Static Electricity Prevention

Static electricity may be generated when SI-H products flow through pipelines, are discharged from pipelines or fall freely. Appropriate measures shall be taken to eliminate static electricity and avoid spark generation.

Equipment Cleaning

When cleaning equipment containing Siemtcoat® EM5502 emulsion, use surfactants and detergents with caution. These agents are alkaline and may induce hydrogen gas generation.

Package

Shelf-life

• Siemtcoat® EM5502 should be stored in a closed container at +10°C to +30°C temperature.
• Siemtcoat standard shelf-life is 12 months.

Safety

Please refer to the Siemtcoat® EM5502/EM5509 MSDS.

Remark

• Emulsion type silicones should be agitated thoroughly before use.
• Emulsion type silicones may freeze at low temperatures, so users in colder regions should take special care with regard to storage.
• Emulsion type silicones should be storage in a closed container at 10°C to +30°C temperature.