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LATEST DEVELOPMENTS IN COATINGS TECHNOLOGY


Adapta In-Mould Coating for SMC


Adapta Color has


launched a new range of powder coatings for SMC, which stands for Sheet


Moulding Compound.


This new range offers a wide range of colours with new metallic and functional effects


which open up new markets for powder paint-coated SMC, also known as


PiMC (powder in- mould coating).


The Adapta Bonding System®


metallization


technology enables better application and finishing of this


type of products with innovative finishes such as imitation stainless steel.


Smart paints are currently being


developed to transfer the features of our Smart Coatings catalogue to


PiMC technology.


SMC is a fibre reinforced plastic (FRP) formed by a thermosetting resin, a fibre reinforcement, fillers and additives that impart certain properties to the final piece.


SMC is produced from fibre cut in situ, which is randomly placed between two layers of the thermosetting system (resin, catalyst system, fillers and additives). This pre- impregnated material passes through a compaction system that ensures the complete impregnation of the fibers, before being laminated and rolled for storage and maturation until its thickness and viscosity are suitable for moulding.


SMC is normally moulded by compression. This is done by cutting the required weight from the SMC sheet and placing it in a mould heated to a temperature of 130 ° to 150 ° C. Pressure ranges from 50 to 100 bar, with a residence time in the press which can range from 25 to 180 seconds depending on the reactivity of the material, its thickness and the size of the piece.


Recent technological advances focus on replacing the fibreglass with natural fibres such as flax, jute or hemp.


The main applications of SMC include the manufacture of electronic components with low


54 SURFACE WORLD may 2013


surface resistivity, automotive components, bus and train interiors, sanitation, water tanks, etc.


Its main advantages are its high strength and low weight, heat resistance, fire resistance, electrical insulation, water resistance, low emissions, and ability to achieve tight tolerances and complex shapes.


The new coatings developed by Adapta Color allow the moulding and painting of the SMC piece in the same operation, known as powder paint for mould or PiMC (Powder In-Mould Coating), allowing a great saving in costs. Paints can also be developed to give the finished piece very good weather resistance, preventing spoilage by chalking.


The R & D laboratory of Adapta Color has a 100Tm industrial press and various moulds for the development of products based on the application parameters of the client, being able to regulate the speed of pressing, lower and upper mould temperatures and closing, opening and residence times, allowing us to design custom products


according to the requirements of the client. www.adaptacolor.com


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