Wood-grain-imitated co-extruded plastic-wood profile and preparation method thereof

Abstract

The invention provides a wood-grain-imitated co-extruded plastic-wood profile. The wood-grain-imitated co-extruded plastic-wood profile comprises a surface layer and a base material, wherein the adding amounts of plastic and a functional aid in the surface layer are more than the adding amounts of the plastic and the functional aid in the base material, so that the cost is favorable to be reduced; the surface layer is subjected to color adjustment by virtue of a main color and a secondary color (a third color can be increased according to requirements), so that the effects of the color shade and the layer variability of the surface layer can be well achieved. The invention further provides a preparation method of the wood-grain-imitated co-extruded plastic-wood profile. The preparation method comprises the processes of granulation, synchronous extrusion and surface treatment. According to the preparation method, surface layer particles including main color particles and secondary color particles are respectively granulated and are uniformly mixed for co-extruding the surface layer, and the surface layer is subjected to surface treatment in a 'hot plate and cold roller' manner. The co-extruded plastic-wood profile prepared by virtue of the preparation method is low in cost, excellent in water resistance, corrosion resistance and aging resistance and durable, further has the grains, color gradation and texture of imitated and natural wood, so that the user experience is improved.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a wood-grain-like co-extruded plastic-wood profile and a preparation method thereof. Background technique [0002] Wood-plastic, also known as wood-plastic, is a new type of composite material that is made of plant fiber as the main raw material, mixed with plastic after heating and cooling. It not only maintains the natural feeling of solid wood materials, but also has good moisture-proof and water-resistant properties of plastic Acid and alkali resistance, anti-fungal, anti-moth and other properties, with a wide range of applications, covering almost all fields of use of logs, plastics, plastic steel, aluminum alloys and other similar composite profiles. It is widely used in indoor and outdoor decoration and furniture industries, especially It is most widely used in outdoor flooring. At the same time, WPC materials also solve the problem of recycling waste resources in the p...

AI Technical Summary

Problems solved by technology

[0003] At present, all kinds of co-extruded plastic wood profiles on the market usually adopt monochrome surface, and some use wood grain roller to heat and stamp patterns, but the existing methods usually obtain wood grain lines that are not natural enough, and the wood grain is too flat, which is different from Outdoor solid wood profiles have certain ups and downs variability. Compared with solid wood profiles, there is still a big gap in color depth and natural texture effects, resulting in poor user experience.

On the other hand, ordinary wood-plastic profiles have some weaknesses that need to be improved. Discoloration and surface pulverization are problems that often occur after several years of use in wood-plastic profiles. This is consistent with the high addition of plant fibers in wood-plastic profiles Related; but simply reducing the addition of plant fibers while increasing the amount of plastics and additives will inevitably lead to a huge increase in cost

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