Weather resistant wood-grain imitating PVC plastic profiled bar and method for manufacturing same

Abstract

The invention relates to PVC plastic profiled material, in particular to a weather-resistant colored PVC plastic profiled material and a manufacturing method thereof. The weather-resistant wood-grain-like PVC plastic profiled material comprises PVC profiled material the entire body of which is colored by imitation wood grain. A transparent material layer with high weather resistance is compounded on the outer surface of the PVC profiled material by co-extrusion. The transparent material layer with high weather resistance has transparent optical effect and is suitable for plasticizing extrusion. The transparent material layer with high weather resistance is preferably PMMA or ASA. The invention also provides the manufacturing method for the PVC plastic profiled material. The PVC plastic profiled material in the invention is characterized by long-term preservation of color and pattern and mature manufacturing technique.

Description

Technical field [0001] The invention relates to a PVC plastic profile, in particular to a weather-resistant color PVC plastic profile and a manufacturing method thereof. Background technique [0002] The development of PVC plastic profiles is already a very mature product: products include PVC plastic door and window profiles, PVC exterior wall hanging boards, PVC synthetic resin tiles, PVC guardrails and other outdoor products. With the increasing of people's individual needs, the colorization of PVC plastic profiles is gradually being favored by people. The colorization of PVC plastic profiles has developed to this day and has gone through many forms. Color PVC plastic profiles include: whole body color profiles, wood-like profiles, coated profiles, fluorocarbon spray profiles, color PMMA co-extrusion profiles, color ASA co-extrusion profiles, wood-like ASA co-extrusion profiles Profiles and so on. [0003] At first, the whole body color profile and imitation wood grain profile...

AI Technical Summary

Problems solved by technology

[0012] 1. The film covering technology belongs to the secondary molding technology, that is, after the finished product is formed, a layer of weather-resistant film is applied on the surface of the product, and the process of removing impurities and gluing is carried out in the middle; and the film can only be applied on a relatively regular surface. It is difficult to achieve a good paste on the special part of the profile

Therefore, there is no product that is completely coated on the surface of the entire profile, and the color of the surface of the product is inconsistent, and only part of the surface can be colored.

[0013] 2. The imitation wood grain technology belongs to one-time molding technology. This technology should be a mature technology in PVC material, but it is not fully mature in ASA material, especially the plasticization process in the co-extrusion machine has a high requirement for the process. Strict; the products of different machines are prone to obvious color difference, and even the wood grain effect disappears, etc.

When co-extrusion technology is used to form a weather-resistant layer on the surface of the product (usually there is a co-extrusion layer on the surface exposed to sunlight), the profiled material has a color effect, but it is still difficult to achieve a consistent color and wood grain effect; if Therefore, it is difficult to keep the color and wood grain of the ASA material consistent with the coloring on the PVC profiled material.

In addition, ASA material is prone to defects such as scratches during production. This phenomenon is more obvious on colored materials, and the color of the scratched part will be lighter and lighter.

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