White polypropylene tube with high shading performance and production method thereof

Abstract

The invention provides a white polypropylene tube with high shading performance and a production process thereof. The white polypropylene tube comprises polypropylene resin serving as a raw material, and is characterized in that the raw material comprises titanium dioxide, a spacer and a dispersing agent, wherein the titanium dioxide is 2 to 5 percent of the mass of the polypropylene resin; after the titanium dioxide is processed, an aluminum oxide layer and an organic layer wrap the outer surfaces of TiO2 particles sequentially from inside to outside; the spacer is 100 to 150 percent of the mass of the titanium dioxide; and the dispersing agent is 0.1 to 0.5 percent of the mass of the polypropylene resin. According to the white polypropylene tube, the raw materials for producing the white polypropylene tube are improved, so that the white polypropylene tube achieves a high-shading effect; and the production process is simple and high in practicality.

Description

technical field [0001] The invention belongs to the technical field of polypropylene pipes, in particular to a white polypropylene pipe with high shading performance and a production method thereof. Background technique [0002] Polypropylene pipes have the characteristics of low density, hygiene, non-toxicity, good corrosion resistance and easy processing, and are widely used in construction, chemical pipelines and other fields. [0003] There are strict requirements on the shading performance of polypropylene pipes at home and abroad. For example, the ISO 15874-2:2003 standard clearly requires that the light transmittance of the pipes should be less than 0.2%. In the national standard GB / T 18742.2-2002, it is also required that the pipe should be opaque. In order to make polypropylene pipes meet the requirements of light-tightness, most pipe manufacturers will choose to produce gray or green polypropylene pipes, because these two colors of pipes have strong light-shieldin...

AI Technical Summary

Problems solved by technology

Due to the poor shading performance of the white pipe, there is a problem of light transmission in the pipe, which leads to the easy breeding of algae and bacteria inside the pipe, which is harmful to human health.

[0004] At present, foreign pipe manufacturers generally use polypropylene colored materials to produce pipes. Since foreign petrochemical plants do not provide white polypropylene colored materials, foreign pipe manufacturers do not produce white polypropylene pipes.

However, domestic pipe manufacturers generally use the method of adding white masterbatch to polypropylene to produce white polypropylene pipes. Due to the insufficient hiding power and poor dispersion of the pigment titanium dioxide in the masterbatch, the shading performance of the pipes generally does not meet the standards. Require