Hollow glass bead plastic composite building template and preparation method thereof

Abstract

The invention relates to a hollow glass bead plastic composite building template and a preparation method thereof and belongs to the field of production and manufacturing of the composite building template. The plastic composite building template disclosed by the invention is of a multilayer composite structure; polypropylene materials are filled on upper and lower surface layers of the template by adopting superfine activated calcium carbonate; a core layer is made of high-performance hollow glass bead / polypropylene composite material; and the hollow glass bead plastic composite building template is formed in one step by multilayer co-extrusion by utilizing advanced special plastic template production equipment. The hollow glass beads added into the core layer part have the characteristics of light reduction, low thermal conductivity coefficient, high compressive strength and good liquidity, so that the building template has high stability, and the shrinkage and the warpage are reduced. Meanwhile, the liquidity of the material can be effectively improved in the preparing process of the template; the viscosity and the internal stress of a mixture are reduced; the toughness of the template is significantly improved in the using process, the impact resistance is significantly improved, and the surface hardness is improved; and compared with an existing template, the template has the advantage that under the condition of the same size, the weight is greatly reduced and the material cost can be remarkably reduced.

Description

technical field [0001] The invention relates to a hollow glass microbead plastic composite building template and a preparation method thereof, belonging to the field of composite building template production and manufacturing. Background technique [0002] In the construction process of construction projects, the traditional wooden formwork and bamboo plywood used in pouring concrete components are not easy to demould, have poor finish, and are not waterproof. The shortcomings have been gradually eliminated, and replaced by plastic building formwork made of polyethylene or polypropylene as the main raw material. This kind of formwork solves the shortcomings of traditional formwork, but there are high production costs and excessive weight. Defects. In order to solve this problem, most of the current plastic building templates use wood flour or rice bran as fillers to reduce production costs and their own weight. [0003] Although these fillers effectively reduce production ...

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Problems solved by technology

[0004] The purpose of the present invention is to address the deficiencies of the prior art, to provide a high compressive strength, low thermal conductivity, good processing fluidity, and long service life, so as to solve the poor heat resistance and low surface hardness of the existing template. A hollow glass microsphere plastic composite building formwork and a preparation method thereof due to low formwork strength and rigidity resulting in low load capacity, and at the same time, due to the large thermal expansion and contraction coefficient of the formwork, it is very easy to cause arching of the formwork during use