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Temporary Peelable Masking Resin for Plastic Surface Protection

Applications	Theoretical Area Covered by 1 Liter of Coating	Performance Highlights
General Masking	Plastics	UV Light Curing
Plastic Surface Protection	Stainless Steel	Easy manual peel off
Airflow Testing	Steel	Excellent abrasion resistanceÂ
Painting and Powder Coating	Painted metal or plastic	Outstanding extensibility and flexibility

Introduction:

UV_PlasticMask_737 is a UV curable, translucent, low adhesion, tough film with easy manual peel off metal surfaces.

UV_PlasticMask is an economical one component, UV cure masking resin that simplifies your process by offering fast, reliable protection for your parts. No measuring or special mixing required. It eliminates the need for fixtures, tapes, lacquers and wax in your plastic and metal finishing process and with the proper UV cure (irradiance), 737 will not leave a residue on the surface.

Uncured Typical Resin Properties

Property	Value	Test Method
Solvent Content	Zero nonreactive solvents	N/A
Chemical Class	Aliphatic urethane diacrylate	N/A
Appearance	Translucent Gel	N/A
Density, g/cm3	1.13	ASTM D1875
Viscosity, cps @ 20rpm	80,000 nominal
Soluble in	Organic Solvents	N/A

Typical cured properties

Property	Value
Tensile strength, psi	1170
Elongation at break, %	320
Youngâ€™s modulus, psi	1280

UV cured 6 mil thick film

UV Cure Guidelines

Light source: 400-600 W/in. mercury medium pressure arc or microwave lamp
Distance: focused light source with reflector for reduced part temperature
Total Energy Density (cm2): .9 W/cm2 (.68 J/cm2) * UVA
Belt speed: 20 ft./min.

UV cure rate is dependent on many variables, such as; coating thickness, lamp irradiance, distance from the light source and line speed. It is recommended that a radiometer be used to monitor irradiance.

Measured with an EIT UV Power Puck radiometer

Depth of Cure

UV_PlasticMask 737 has superior depth of cure for a UV cure coating. Most UV_Mask formulations typically cure to a depth ofÂ .6 to 1.3 cm ( Â¼â€ to Â½â€).

Storage and Handling

Surfaces to be masked should be clean and free of contaminants.

Avoid exposing the product to high temperatures and minimize exposure to artificial or natural light prior to curing.

Cool the cured parts to room temperature before testing.

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