When a plastic part is exposed to solar radiation, its temperature tends to increase significantly. This phenomenon, common in elements such as window profiles, façade claddings (sidings), or any plastic component installed outdoors, can lead to structural deformations, loss of functionality, and ultimately, a reduction in the product’s lifespan.
Delta Tecnic, a company specialized in the development of masterbatches for the plastics sector, has addressed this issue through the careful selection of pigments: it is able to reduce the thermal increase experienced by a plastic part under solar exposure by up to 30%. This figure, supported by internal technical tests and the company’s accumulated experience, represents a significant advancement for manufacturers and designers seeking to maximize the performance of their exposed products.
The challenge of heat in outdoor plastics
Solar radiation, and particularly infrared light, is the main factor responsible for the temperature increase in plastics. The darker the color of the piece, the greater its ability to absorb heat, which can lead to temperature rises of more than 20 degrees within minutes. In extreme conditions, this can bring the polymer to temperatures of 75 or even 80 degrees, a threshold at which the risk of deformation and loss of mechanical properties increases dramatically.
To avoid these problems, the industry has traditionally relied on light colors or limited the use of dark shades in outdoor applications. However, this strategy restricts design possibilities and does not always meet market needs. This is where Delta Tecnic offers a distinctive solution: the use of cool pigments, which are capable of absorbing less infrared radiation and therefore limiting thermal increase even in intense colors.
Cool pigments: efficiency and cost-effectiveness
Cool pigments, by their nature and technology, are not an economical option in themselves. However, thanks to its experience and deep industry knowledge, Delta Tecnic has developed its own methodology to combine cool and conventional pigments, achieving formulations that optimize both thermal efficiency and final cost.
The added value of Delta Tecnic lies in its ability to customize each solution. When a client requires a plastic part for outdoor use, Delta Tecnic requests the uncolored base compound and, from there, designs a specific pigment formulation. This combination undergoes a rigorous Build Up Test in the company’s laboratory, where solar exposure is simulated using an infrared irradiation source and the temperature reached by the part is monitored over time.
The results of these tests make it possible to compare the thermal behavior of the proposed formulation with conventional alternatives, as well as to adjust the price according to the client’s real needs. In practice, this translates into solutions that, with equal performance, can be up to 30% more cost-effective than those offered by other players in the market.
Advanced testing and expert guidance
The Build Up Test used by Delta Tecnic is a key tool for ensuring the quality and reliability of pigment formulations. This test replicates the solar exposure conditions that the plastic part will face in its final application, allowing for the anticipation of possible temperature increases and the adjustment of pigment selection accordingly.
The machine used in Delta Tecnic’s laboratory is equipped with an infrared light source, which represents the part of the solar spectrum most absorbed by pigments, and a high-precision temperature probe. In this way, it is possible to observe in real time how the temperature of the part evolves and to determine whether the formulation meets the safety and durability requirements demanded by the client.
More responsible resource consumption, greater sustainability
By preventing deformations and extending the lifespan of parts, the need for replacements is reduced and resource consumption is minimized. Additionally, the ability to use more intense and customized colors opens new opportunities for design and differentiation for manufacturers.
Delta Tecnic, aware of the importance of sustainability and efficiency in the plastics sector, maintains a strong commitment to continuous innovation. Its investment in R&D and collaboration with clients and suppliers are the pillars that underpin its leadership in the cool pigments market.
