Processing method of composite plastic materials for high-toughness building templates

Abstract

The invention relates to a processing method of composite plastic materials for high-toughness building templates. The processing method comprises the following steps: mixing and granulating a mixture of rubber and additives to obtain a rubber-modified material, and then carrying out melt blending on the rubber-modified material and plastic particles. The processing method has the advantages that on one hand, the liquid or solid additives can be effectively mixed with rubber and enter the rubber after being mixed to enable the network structure in the rubber to be fully relaxed, so that the processing fluidity, the compatibility and the dispersing uniformity of the rubber when being subjected to melt blending with the plastic particles are improved and further the toughness of the composite plastic materials is further improved; on the other hand, the rubber-modified material is large-particle-shaped, cannot cause pollution to a production workshop for melt blending of the rubber-modified material and the plastic particles and also cannot cause hazard to related operators; in addition, since the additives are uniformly dispersed inside the rubber-modified material and the internal network structure is fully relaxed by mixing, the melt blending effects of the rubber-modified material with the plastic particles also cannot be influenced even though the rubber-modified material is the large particle material.

Description

technical field [0001] The invention relates to the field of building construction templates, in particular to a processing method for composite plastic materials for high-toughness building templates. Background technique [0002] The building templates used in building construction mainly include wooden, bamboo, steel, plastic building templates and composite building templates formed by compounding several of the above-mentioned building templates. Although steel building formwork is strong and has a high number of uses, it is expensive, easy to rust, heavy, and difficult to transport; bamboo and wooden building formwork are light in weight, wide in width, and have few seams, but their strength is relatively low, and they are not moisture-proof and waterproof. It is easy to mildew and rot, and consumes green resources. In contrast, plastic building formwork has the advantages of low cost, light weight, high reusability, stainless, non-stick cement, and waterproof. Howev...

AI Technical Summary

Problems solved by technology

However, the existing plastic building templates also have disadvantages: one of the disadvantages is that they are not rigid enough and easy to deform, which can be improved by adding reinforcing fibers to the molding raw materials for reshaping; another disadvantage is that the toughness is not good, and the resistance The drop resistance is not enough, and it is easy to be damaged in the case of high-altitude operations, which can be improved by adding toughening agents

However, in this patented technology, the waste rubber powder, the active dispersant and the compatibilizing modifier are stirred and mixed at room temperature, and the active dispersant can only penetrate into the surface layer of the waste rubber powder to make the network structure on the surface of the waste rubber powder However, if there are too many network structures inside the waste rubber powder that cannot be relaxed, it will affect the processing fluidity and melt blending effect when blending with plastics, so the The patented technology uses waste rubber powder with a 100-mesh sieve (below about 150 micron particle size) as raw material to reduce the internal unrelaxed network structure; it is also based on the same reason, and the waste rubber particles are large in size and internal network The structure cannot be fully relaxed, so this method is not suitable for melt blending with plastics

[0004] The disadvantages of direct melt blending of waste rubber powder and plastic granules are: firstly, since the waste rubber powder is a powder, it will inevitably pollute the production environment of rubber and plastic blending, and the production of waste rubber powder is not only the use of crushers, but also A powder machine is required, so the production of waste rubber powder will also pollute the environment and cause damage to the health of operators; secondly, the liquid additives added to waste rubber powder, such as some active dispersants, can still enter the waste rubber powder through infiltration. The surface layer or inside of the rubber powder, but some solid additives, especially some compatibilizing modifiers, cannot enter the waste rubber powder, which makes it difficult to form a uniform blending effect when the waste rubber powder and plastic particles are melt blended

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