Whether as flooring, as window profiles, as plastic pipes or children's toys: PVC is characterized by its very high bandwidth of the most diverse applications. This is due not least to its outstanding chemical and physical properties, such as good stability against sunlight, difficult inherent flammability and good chemical resistance. PVC is one of the oldest polymeric materials, having developed into one of the most important and inexpensive mass-produced plastics from its first large-scale production in the 1920s to the present day. It owes this primarily to constant further development both in the field of polymer synthesis and in the additivation and research of new and customized formulations. With our many years of experience in the development of formulations and the processing of PVC, we are the perfect partner for you when it comes to equipping this material for future challenges. For this purpose, SKZ has decades of know-how and an extensive machine park for PVC processing and testing, which we are happy to share with you.
In the preparation phase, the additives used are incorporated into the PVC matrix with a mixer. During this process, the powder heats up due to the friction of the material or the collision of the particles, so that the temperature rises continuously. The challenge is to distribute the additives homogeneously by adjusting the process parameters (speed, temperature and time) without overloading the PVC. In this phase, the PVC grain absorbs liquid additives, so that a dry, free-flowing powder, the so-called dry blend, is formed again. This can be further processed into molded parts or granules, e.g. with an extruder, without any further processing step.
The following mixers are available at SKZ for the preparation of PVC dry blends:
As one of only a few institutes in Germany, SKZ offers complete support in the development of PVC products. For this purpose, our many years of know-how as well as numerous facilities for the compilation of formulations, preparation and processing of dry blends, and characterization of materials and components are available to you. In order for your product to develop its full performance potential, the material selection, processing and component design must be optimally coordinated. Together with our colleagues, we will be happy to advise you along the entire process chain.
In our pilot plants, we have the most modern equipment available for small-scale and laboratory production. We also offer a wide range of special processes. Please feel free to contact us at any time.
Do you need innovative solutions to implement your ideas? Our experts will be happy to support you here and research alternative materials or the use of recyclates for you. Together with you, we create a requirements profile for your product and research suitable materials in databases of manufacturers, organizations and research institutions.
After polymerization, PVC cannot be processed without further modification. To process PVC, it is mixed with suitable additives, especially stabilizers, but also with fillers, plasticizers, lubricants, pigments or impact modifiers. Typical applications are gutters, window profiles, pipes, films, cables or various seals. SKZ provides support in the development of new or optimization of existing formulations with regard to the desired properties.
The various application-specific parameters that can be measured and inspected non-destructively are as diverse as the possible applications of PVC. Geometry determination on a micrometer to decimeter scale as well as the characterization of formulations and the detection of defects in products can be carried out using a wide range of non-destructive methods. For this purpose, extensive measurement technology is available for laboratory and inline use based on ultrasound, X-ray including computer tomography, thermography, terahertz and radar technology, among others.
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In our state-of-the-art laboratories, we conduct research into the materials of tomorrow. We work closely with industry to make many good products even better and, above all, more sustainable. Challenge us. Together we will find a solution to your problem.
In order to be able to manufacture a competitive PVC product, the selection of the suitable processing method, the right machine as well as the optimum process parameters is a prerequisite. Depending on the type of end product and its quality requirements, a wide range of processes for PVC processing on an industrial scale can be offered at SKZ. For the production of pressed sheets, extruded profiles, films, pipes, or even injection-molded PVC samples, the SKZ's processing technology center has a large number of process-standard machines for processing PVC: