Preparation method of rock wool/corn straw fiber composite heat insulation material

Abstract

A preparation method of a rock wool / corn straw fiber composite heat insulation material comprises the following steps: respectively compacting rock wool and corn straw fibers to prepare tablets, arranging the obtained rock wool and corn straw fiber sheets on a pendulum machine in an interval lamination manner to form superposed cotton layers, adding the superposed cotton layers into a pleating machine, carrying out extrusion pleating, impregnating, and curing to prepare the rock wool / corn straw fiber composite heat insulation material. A mass ratio of the rock wool to the corn straw fibers in the material is 70%:30%-85%:15%. The above product prepared through the method can substitute traditional rock wool heat insulation materials widely used at present, the resin infiltration speed and the interface compatibility of the product are effectively improved without influencing the heat insulation performance of the product, the mechanical performances of the product are improved, the specific gravity and the production cost of the product are reduced, and a new approach is provided for comprehensive utilization of corn straws.

Description

technical field [0001] The invention relates to a composite material processing technology, in particular to a preparation method of a rock wool / corn stalk fiber composite thermal insulation material. Background technique [0002] As a high-quality and low-cost thermal insulation material, rock wool has good thermal insulation performance, good sound insulation and sound absorption effect, low density, low thermal conductivity, flame retardant, environmental protection, stable chemical properties, non-toxic and harmless, low price, and long service life. And other outstanding advantages, has gradually become an important choice of thermal insulation materials. In the United States, more than 70% of building exterior wall insulation uses rock wool materials. [0003] At present, organic insulation materials such as polyurethane foam materials are mostly used for external wall insulation in my country, and rock wool materials are not widely used. Compared with organic therma...

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Problems solved by technology

However, due to the strong polarity of the rock wool surface, the interface compatibility between it and the organic resin is poor, resulting in a slow resin penetration rate during product processing, and it is difficult for the resin to completely penetrate the rock wool fiber, which affects to a certain extent Improve the production speed of the product and the mechanical strength of the final product

Therefore, the mechanical strength of most rock wool insulation materials produced in my country is still difficult to compare with organic insulation materials such as polyurethane foam materials.