Antimicrobial PVC laminate
According to the PVC institute, vinyl chloride polymers is one of the most used worldwide. It stands out for being able to generate both flexible products such as hard, just by varying the percentage of plasticizers in their composition. Its cost-benefit ratio does operate in different sectors offering unique properties, such as chemical stability, weather resistance and ease of recycling. Further, from the nanotechnology it is possible to incorporate various features to PVC products, which increases the number of applications of the polymer and adds more quality in use.
Polyvinyl chloride: Sustainable Polymer
In an era where sustainability demonstrates increasing its importance, Polyvinyl Chloride stands out for being the only commercial polymer independent of the oil extraction. As the second most consumed thermoplastic on the planet (IBGE 2011), 57 weight% of PVC is obtained from Chloro extracted from rock salt or sea salt earth, both renewable raw materials. The remaining 43% derived from ethylene derived from petroleum or natural gas, but can also be obtained from the alcohol of sugarcane.
Although not considered a biopolymer, PVC is easily recyclable, has a low life cycle, and its products have high durability.
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The manufacture of synthetic laminate
In addition to the good properties, the manufacturing with low power consumption allows the polyvinyl chloride is used in a high range of products. Featured are the PVC films and laminates, Very popular for water coatings, automotive, footwear and civil.
The production process of the synthetic laminate consists of applying a PVC film on a fabric, paper or even another polymer. To obtain the film, the raw material is initially subjected to a calender, where the polymer is heated to a specific viscosity, it is pressed between cylinders and who plan the material, resulting in a PVC foil. click here to learn more about calendering.
When a reinforcing textile or paper is adhered to this film still in liquid or pasty form, PVC adheres to the substrate, penetrating between the fibers which results in a mechanical anchoring. Then, the flattened film is subjected to a melting process, where the layer gets greater strength and adhesion to the substrate. This procedure is called the spread coating. Several products are produced in this manner, the container example, bonnets of cars and boats, inflatable boats and buoys, awnings, etc.
Additives PVC laminate
In flexible PVC products, some additives and plasticizers such as epoxidized soybean oil may serve as food for microorganisms. (PVC Technology, 2nd Ed.) In addition, in some applications such as truck tarps or nautical sector, there is a major exhibition of these products to moisture and contact with bacteria, fungi and algae.
The simplest way to solve both problems is the addition of antimicrobial additives, which fight the formation and proliferation of these unwanted microorganisms, which extends the life of the product and promotes better health and well-being to its users.
Outra característica importante do PVC é a não-propagação de chamas, entretanto a presença do Cloro em sua composição pode gerar gases tóxicos em sua queima. (WANG, R., UFPR) Para garantir a segurança em caso de exposição ao fogo, a incorporação de aditivos retardantes de chamas não-halogenados ou supressores de fumaça são importantes na segurança do consumidor.
Due to its versatility and its polar structure, PVC is a polymer very sensitive to the incorporation of additives. The TNS offers both solutions for the laminates market in PVC, without the need for any change in the conventional production process. Our research team always search for new developments to add more health and well-being to people's lives.