Production technology of polypropylene building template

Abstract

The invention provides a production technology of a polypropylene building template, which is the technology for producing the building template by adopting waste plastics as the raw materials. The production technology comprises the steps of pretreating the raw materials, mixing the materials, and carrying out extrusion molding. The raw materials are treated based on a certain ratio and prepared into the product building template under a certain condition. The product building template has the characteristics that the construction quality is high, the building template can be recycled for a plurality of times, the cost is reduced, the benefit is increased, the energy conservation and environment protection are realized, and the residues can be recycled; and the product building template has a large market demand and wide prospect, and is an excellent substitute for steel templates, bamboo plywood and wood plywood.

Description

technical field [0001] The invention relates to a production process of building materials, in particular to a production process of using waste plastics as raw materials to produce building templates. Background technique [0002] Building formwork is a temporary structure commonly used on construction sites. It is manufactured according to the design requirements, so that the concrete structure and components are formed according to the specified position and geometric size, maintain their correct position, and bear the weight of the building formwork and the force acting on it. load. The purpose of formwork engineering is to ensure the quality of concrete engineering and construction safety, speed up the construction progress and reduce engineering costs. Existing wooden templates and bamboo boards have low service life, great damage to forests, affect human ecological environment, and are not environmentally friendly. Among them, the steel formwork has high strength, g...

AI Technical Summary

Problems solved by technology

Existing wooden templates and bamboo boards have low service life, great damage to forests, affect human ecological environment, and are not environmentally friendly

Among them, the steel formwork has high strength, good finish, and strong wear resistance, but its production cost is high, and a large number of accessory parts are required for installation, the operation is cumbersome, the labor intensity of mold assembly is high, and the mold assembly process is difficult; although bamboo and wood formwork are relatively cheap, The finish is not bad, but the strength is not enough, the acid and alkali corrosion resistance is poor, the wear resistance is poor, and it is easy to deform when it absorbs water, is compressed, and is impacted, and the reuse rate is very low and the service life is short.

The existing building templates also have wood-plastic composite templates, which are much better than bamboo and wood templates. There are still big problems in the strength and toughness of the templates. At the same time, the consumption of building templates is not small. It is not a small waste for the scarce bamboo and wood resources, which is not conducive to the sustainable development of resources

[0003] With the continuous improvement of people's living standards and the gradual enhancement of environmental protection awareness, more and more people are aware of the impact of waste plastics on the environment as the main body of solid waste pollution and white pollution. The annual waste plastics produced in our country are 260 ~5 million tons, of which waste polypropylene (Polypropylene, PP) accounts for more than 1 / 3 of the total waste plastics. Due to the lack of systematic recycling channels and recycling uses, and the natural degradation of waste plastics is very difficult, it makes the treatment of this type of pollution Even if it is incinerated together with other pollutants, it will produce a large amount of polluting gas, which will cause secondary pollution to the environment, and even cause greater harm. Therefore, a feasible recycling measure is needed to reduce its impact on the environment. environmental hazards