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  • The company presents itself as a reference supplier of homogeneous colours for polyvinyl chloride (PVC) film manufacturers.
  • The use of masterbatch ensures a cleaner mixing process, a higher quality product and improves both productivity and efficiency.

Obtaining a homogeneous colour in the final product of the calendering industry is a priority. DeltaTecnic, a leading technology company in industrial colour chemistry, recommends the use of masterbatches to companies in this market to guarantee perfect regularity of the desired colour in polyvinyl chloride (PVC) films.

Delta Tecnic has global expertise in PVC colouring, which can be done with pigments that require a lot of cleaning, or with masterbatches: plastic-coated pigment concentrates that do not foul the mixing zones. Through the company’s range of products, calendering companies can produce PVC film more efficiently and cleanly by means of simplified and reproducible colour development between different productions.

It should be borne in mind that if a manufacturer does not obtain colour consistency in his final product, he has an extra cost of re-adjustment in his manufacturing, and it will not offer the expected value. Similarly, film replenishment of certain items must be equally homogeneous to give a high-quality image in the market. There are a variety of applications in this regard, whether it be films for waterproofing buildings, floors, window frames, swimming pools, large format advertisement films or automobiles. In all these cases, PVC films require high colour consistency.

The advantages of monopigmentary masterbatches

In the market, one can find companies that need hundreds of colours for several short production runs. If a company, for example, requires the formulation of 800 colours per year, it clearly does not make sense to demand such numerous masterbatch references. In this case, monopigment masterbatches are the best solution, as a small amount of resources can be used to solve an infinite number of final colours. These single pigment masterbatches offer excellent dilution during the calendering process and a perfect dispersion that facilitates colour consistency between productions.

Based on Delta Tecnic’s technological innovation, this type of masterbatch is manufactured in a powder-like format through a special milling process using cryogenic mills. The application of liquid nitrogen in the pellet cutting process allows for the generation of so-called cryopellets, which do not melt when subjected to high temperatures during the milling phase. Thanks to its extensive range of single pigment masterbatches, Delta Tecnic guarantees neat and uniform final colours that contribute to increased productivity and cost reduction.

In addition, thanks to the excellent dispersion of the pigments used during masterbatch processing, possible spots or surface defects during the extrusion or calendering process are eliminated. This helps to replicate the exact colour in each run, something impossible to achieve using pure pigments, minimising invalid results and the production of non-conforming product due to re-adjustments at the beginning of the production of the coloured sheet.

On the other hand, there are other companies that need to produce fewer colours, but in very long runs. In this case, Delta Tecnic recommends the purchase of masterbatch references, capable of directly obtaining the final colour desired by customers, so that with just a few masterbatch references all colours can be covered without the need to use pigments, which, apart from dirtying the installations, the turbo mixing and the feeding tubes, do not ensure colour regularity between different productions of the same article.

The use of masterbatches reduces the time required for cleaning the mixing units by up to 80%, providing a clear competitive advantage and boosting operational and energy efficiency.