Photodiffusion polypropylene material and preparation method thereof

Abstract

A photodiffusion polypropylene material is characterized by being prepared from components in percentage by weight as follows: 88.6%-97.4% of polypropylene, 0.1%-0.5% of a nucleating agent 1, 0.1%-0.5% of a nucleating agent 2, 0.5%-2% of a photodiffusion agent 1, 0.5%-3% of a photodiffusion agent 2, 0.2%-2% of a weather resisting agent, 1%-3% of a dispersing agent and 0.2%-0.4% of an antioxidant.The preparation method of the photodiffusion polypropylene material comprises the following steps: uniformly mixing polypropylene, the nucleating agent 1, the nucleating agent 2, the photodiffusion agent 1, the photodiffusion agent 2, the weather resisting agent, the dispersing agent and the antioxidant, adding the mixture to a first cylinder feeding section with a length-diameter ratio being 32-68 of a twin-screw extruder, enabling the twin-screw extruder to operate at the rate of 180-500 r / min and the temperature of 180-230 DEG C, and performing extrusion and granulation finally to prepare the photodiffusion polypropylene material. Through the structural improvement, the photodiffusion polypropylene material has the characteristics of being simple, reasonable, low in production cost, easy to produce and realize, high in haze, transparency, heat resistance and weather resistance and the like, and has high practicability.

Description

technical field [0001] The invention relates to a light-diffusing polypropylene material and a preparation method thereof, which belong to the technical field of modified materials with special properties of polymers. Background technique [0002] The main mechanism of the light diffusion material is to add chemical particles into the raw resin as scattering particles, so that the light will continuously refract, reflect and scatter in two media with different refractive indices when passing through the scattering layer, so as to produce the effect of optical diffusion . Light-diffusing materials are mainly used in liquid crystal display, LED lighting and imaging display systems. The requirements for the material are as follows: 1. High haze: the light passing through the material needs to avoid direct sunlight and cause glare defects, and achieve softer, brighter lighting as much as possible. Uniform illumination effect; 2. High light transmittance: reduce energy consumpti...

AI Technical Summary

Problems solved by technology

[0003] At present, the main disadvantages of light diffusion PP on the market are as follows: 1. The haze and light transmittance cannot meet the requirements at the same time. After increasing the material haze, the light transmittance decreases significantly, or after increasing the material light transmittance, the haze does not meet the requirements; 2. The weather resistance cannot meet the requirements, and the parts will turn yellow obviously after using for a period of time, and the light transmittance will drop significantly; 3. The heat resistance cannot meet the requirements, and the product will soften and deform after using for a period of time

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