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The main production process of Car Upholstery PVC Leather Substrate
1. Calendering production:
Car Upholstery PVC Leather Substrate is to put polyvinyl chloride, calcium carbonate, dioctyl phthalate, stearic acid, stabilizers, pigments and other raw materials into a mixer to stir, and then heat to a molten state (similar to dough). Then the raw material is extruded through a filter, and then gradually squeezed through a series of rolling (polished steel rolls), and stretched into a flat plate (similar to a rolling surface). The number of calendering rolls is not certain. Often the more calendering rolls, the more even and accurate the PVC layer thickness of Car Upholstery PVC Leather Substrate will be. The number of calendering rolls will also affect the elongation of the leather. After being rolled into a flat plate, the pattern is pressed onto the surface of the PVC through an embossing roll, and then passed through a stripper (peeling the kraft paper under the PVC layer), and then cooled and wound into a roll. Due to its high production efficiency, calendering is currently one of the most common methods for producing Car Upholstery PVC Leather Substrate. However, since the leather is calendered, the rate of dimensional change is unstable.
2. Compression molding production:
Car Upholstery PVC Leather Substrate raw material passes through a stirrer (same calendering method) and then "pours" onto the compression molded backing (usually kraft paper), passes through the first pressing roller, presses the PVC surface to a suitable thickness and then passes through the oven Evaporate the solvent in the raw materials to solidify the relatively soft (liquid) surface, and then connect the PVC surface to the foam through the second pressure roller and oven, and then pass through the third pressure roller (add adhesive after this pressure roller) The composite roll combines the base fabric and the foam layer, and then heats and expands in the oven to fix the size. Finally, the artificial leather and kraft paper are wound separately.
This process Car Upholstery PVC Leather Substrate is in a relaxed state during the molding process, so the dimensional change rate is small, and the durability is relatively good. It is widely used in automotive, shipbuilding and other industrial fields.
In fact, it is a kind of vinyl polymer, and its material is a kind of non-crystalline material. Car Upholstery PVC Leather Substrate materials often add stabilizers, lubricants, auxiliary processing agents, pigments, impact agents and other additives in actual use. It has non-flammability, high strength, weather resistance and excellent geometric stability.