Painting plastic - what to paint it with?

The process of painting plastic is not complicated, although it requires the use of appropriate paints. Moreover, for proper painting of plastics, the surface must be well-prepared. Otherwise, the paint coating will not be durable and there is a risk of subsequent lack of adhesion. What paints are dedicated to painting plastics? How to paint plastics step by step? See the guide below.

How we paint plastic – get to know the types of varnishes

Plastics are a material that is widely used in virtually every industry. It offers unlimited shaping and coloring possibilities, and is additionally characterized by a high level of resistance to external factors. It is possible to select a type of material that, together with an appropriate paint coating, will meet high expectations. An example would be oven knobs made of PBT+GF15, painted with a dedicated paint with improved resistance – this combination undergoes rigorous temperature resistance tests.

It is common knowledge that the natural surface of plastic products is exposed to scratches and discoloration, e.g. as a result of exposure to UV rays. Despite attempts to color the material, many effects still cannot be achieved without varnishing – due to streaks, visible weld lines, discoloration, and therefore various injection defects, or due to the desire to achieve a very aesthetic appearance or unusual touch. This is where painting plastics comes in handy.

Painting plastics in practice – which varnish should you choose?

Painting plastic components is not difficult, but it requires selecting the appropriate paint/varnish, determining the technological process, including the spraying and drying method, taking into account the target visual and resistance effect.

At the moment, the most popular varnishes and effects are:

  • Soft-touch suede varnishes – very attractive visually and tactilely, and at the same time they hide minor imperfections of the material well. Used in many industries, most often either in a colorless form (on colored material) or with a color They provide good resistance to scratches and chemicals.
  • Satin/semi-matt varnishes and paints in various colors and with metallic grain – most often found on products on store shelves, for example on electronics and household appliances, often with the addition of aluminum grain.
  • UV varnishes (light-cured) – UV varnishing is taking the paint market by storm because these coatings are very scratch-resistant, incredibly hard, and at the same time highly resistant to chemical agents. Very often used in the cosmetics industry, e.g. for cream and perfume caps.
  • Structural varnishes and paints with tactile particles – an interesting visual and tactile effect. These coatings are the best at masking even larger defects on raw parts, they can cover deeper scratches, some sink marks or flow lines.

Paints and varnishes for plastics – what do they protect against?

Painted plastic elements are perfectly protected against various factors, including:

  • scratches and other mechanical damage – UV or structural varnishes will work best here,
  • fading as a result of exposure to UV rays – we select varnishes with additives that prevent color change in such conditions, so that the coatings do not turn yellow and do not degrade,
  • cracking – then we use flexible varnishes. With thin-walled material that is easily deformed, you need varnishes that will not crack or chip,
  • low or high temperature – we use several such varnishes in everyday production, including products for ovens and dishwashers. We present this requirement to the paint manufacturer and we select the appropriate paint together,
  • chemicals – paint coatings in the cosmetics industry often have to pass the L’oreal test as an indicator of whether they are resistant to chemicals. We have selected appropriate paint products that pass not only the above-mentioned test, but also tests using acetone, isopropanol and other chemicals,

If you are looking for a lasting effect on your products, please contact our industrial paint shop. The varnish on the plastic surface adds elegance to the finished elements and helps maintain their aesthetic appearance for many years.

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