A kind of ultra-high weather resistance PVC co-extruded surface layer material and its manufacturing method

Abstract

The invention an ultrahigh-weather-resistance PVC (polyvinyl chloride) coextruded surface material and a manufacturing method thereof, belonging to the field of composite materials. The ultrahigh-weather-resistance PVC coextruded surface material comprises the following components in parts by mass: 40-60 parts of PVC powder, 20-50 parts of CPVC (chlorinated polyvinyl chloride), 10-20 parts of calcium carbonate powder, 0.4-6 parts of stabilizer, 4-7 parts of impact modifier, 1-3 parts of lubricant, 0.4-0.9 part of anti-ultraviolet agent, 0.4-0.9 part of antioxidant, 0.5-1 part of antistatic agent, 3-6 parts of whisker and 3-6 parts of toner. By adjusting the formula, the material has comparable weather resistance with ASA (acrylonitrile-styrene-acrylate), and has higher surface hardness and Vicat softening point temperature. The material is low in cost, does not need to depend on import, and can obviously lower the production cost. The production cost of the product is only about one half of that of the ASA material. The product can be widely used in surface coextrusion of PVC door / window profiles, PVC wood-plastic profiles and PVC tiles to enhance the physical properties and colorfulness of the product.

Description

Technical field [0001] The invention relates to the field of composite materials, in particular to an ultra-high weather resistance PVC co-extruded surface layer material and a manufacturing method thereof. Background technique [0002] Ordinary PVC plastic extrusion products are used outdoors. Four seasons, large temperature differences between day and night, sunlight, rain and dew, microorganisms and other factors have an impact on the physical properties of the material, which are manifested as discoloration, cracking, degradation, and powdering of the product surface. Only through the co-extrusion technology to co-extrude a layer of super weather resistant surface layer material on the surface of the product, to play a protective role. [0003] With the application and promotion of wood-plastic products in the outdoors, these plastic products are produced through extrusion processing. The traditional extrusion process is difficult to meet the requirements of outdoor application...

AI Technical Summary

Problems solved by technology

The manufacture of highly weather-resistant co-extrusion surface materials is the core part of co-extrusion technology. At present, the high-weather-resistance co-extrusion surface materials on the market are mainly ASA, which are mainly imported, and the price is high. The mainstream price in the market is More than 35,000 / ton, and the normal temperature hardness of ASA is about 80 degrees Shore, and the Vicat temperature is about 82 degrees Celsius. Using it in a high-temperature outdoor environment in summer will lead to a decrease in surface wear resistance and rigidity, and the high price will affect co-extruded products. The popularization and application are restricted, and the weather resistance of the conventional single PVC material as the co-extrusion surface material is not enough