Novel environment-friendly composite reinforced polypropylene building template

Abstract

The invention relates to a novel environment-friendly composite reinforced polypropylene building template, belonging to the technical field of building template preparation. By virtue of the interaction between fine powder of waste tires and polypropylene-styrene dibromide graft copolymer and aluminum hydroxide / polypropylene, the bonding force among the components is increased, the reinforced plastic polypropylene building template is subjected to physical blending and chemical modification, so that not only the overall properties of the reinforced plastic polypropylene building template areimproved and the flame retardant function of the reinforced plastic polypropylene building template is enhanced, but also a new field of recycling waste tires is opened. Through the composite reinforced polypropylene building template provided by the invention, the problems that the strength and rigidity of the existing composite plastic building template cannot meet the construction requirements, the thermal expansion and cold contraction coefficient is large and the electric welding dregs are likely to scald a face plate are solved, and a large amount of natural rubber and petroleum resources are saved. The composite reinforced polypropylene building template has the advantages of high strength, good flame retardant effect, easily-accessible raw materials and simplicity in production, and can be widely used as the construction template in construction engineering, hydroelectric structures, irregular design of bridges and tunnels and the like.

Description

technical field [0001] The invention relates to a novel environment-friendly composite reinforced polypropylene building formwork modified by waste tire fine rubber powder and polypropylene-dibromostyrene graft copolymer, which belongs to the technical field of building formwork preparation. Background technique [0002] In the field of building formwork, composite plastic building formwork is a building formwork that does not require wood or steel. It can be sawed, drilled, planed, nailed, and welded, and has corresponding strength, which can meet the requirements of building formwork. Possess the use performance. Compared with other material formwork, plastic building formwork has many significant advantages: 1. The surface of the board is smooth and smooth, which can meet the requirements of fair-faced concrete formwork, and the demoulding is fast and easy; 2. Good water resistance and corrosion resistance, and the size of the board is stable ; 3. Strong plasticity, can ...

AI Technical Summary

Problems solved by technology

Polypropylene resin is the fastest growing among the five major plastic varieties today. It is a milky white waxy substance, non-toxic, tasteless, and odorless, with a density of 0.90-0.91g / cm 3 , excellent performance and cheap price, but the product has the disadvantages of large coefficient of thermal expansion and contraction, easy to become brittle at low temperature, not wear-resistant, easy to age, etc.

Therefore, although the strong plastic polypropylene building formwork has the advantages of non-toxicity, light specific gravity, corrosion resistance, high temperature resistance, and cheap and easy-to-obtain raw materials, due to the use of recycled polypropylene resin as the base material, there are still some problems in the process of development and application. Practical problems, such as the strength and rigidity of the formwork when used as a wall column formwork cannot meet the requirements, the thermal expansion and contraction coefficient of the formwork is large, and the welding slag is easy to burn the panel during construction, etc., which requires adjusting the formula of the plastic formwork and improving production process to further improve the comprehensive performance of reinforced polypropylene building formwork

[0004] On the other hand, with the development of the rubber industry, a large number of natural rubber and petroleum resources are used, so that the available natural resources are constantly decreasing. However, with the sharp increase in the use of automobiles, a large number of waste tires are produced in the world every year. Because waste tires are thermosetting polymer materials, it is difficult to degrade after being discarded, and it is easy to form serious black pollution and fire hazards, making the recycling, treatment and reuse of waste tires a worldwide problem, and people are also looking for various ways to recycle use them

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