conventional PVC - a sheet having a porous structure with a rough surface and opaque tint.If foamed PVC, it is possible to obtain durable and tear on the hard touch material with a smooth glossy surface having a structure of "sandwich".Its inner layer is porous, but in this case the texture will be smooth.
Production of PVC foam
To foam PVC and format articles thereof, used production lines, consisting of equipment such as an extruder, die necessary calibrators, cooler, the receiving device and a device that prepares the product for storage.Despite the fact that this production of physical and chemical indicators complicated the entire process takes place in a small, clean and tidy workshop.
main raw material in the form of free-flowing mixture and the pellets are delivered in plastic bags.On a small platform installed raw stainless steel vats with agitators in which it is filled, water is added.Thus begins the process by which the PVC foam is obtained.Manufacture of his seemingly very simple.Matured in vats for a day polymer components interact, matures, reaches the consistency of molten mass, and fed to the receiving chamber of the extruder, which is to quality PVC foam.
Depending on the performance of the enterprise may be an extruder with a screw or work with two.Experts prefer plants with two screws.They molten mass there is a parallel flow, so the temperature remains constant for longer, allowing PVC foam evenly and effortlessly achieve the required density in the product.
augers convey the plastic mass in extrusion.Here (thanks to pressure) fails foam PVC, and then squeeze out of the extruder through the holes, giving the product the volume and shape.Formed profiles, tubes, sheets, films arrive at the reception table where are served on a moving conveyor belt and simultaneously cooled.
cutting and decorating
for cutting PVC products used circular saws equipped with a vacuum cleaner and a collection of fragments.Cutting products produced at high speed.Then the surface may be applied to a decorative pattern.For this purpose, the processing chain include machine-Greiner, images printed and marked directly on the product PVC.Decorative coating can simulate marble chips, plaster, have other types of processing.
What is valued and where it is used?
very valuable qualities such as strength, lightness and fine-meshed structure, which has foamed PVC.Photo applied to this article demonstrates the example of the pipe.In the context of clearly visible porosity, and this despite the fact that the product surface is shiny and smooth.
resistance to external climatic factors, chemical and physical interactions and corrosion swung open the door to this material for use in construction, the advertising business, agriculture, thermal power generation, oil and gas and chemical industry, in the home.
