A flexible interpenetrating network porous material that can be used for molding and its preparation method

Abstract

The invention relates to a flexible interpenetrating network porous material for mold pressing and a preparation method. The material is prepared through two steps of fiber extraction and interpenetrating polymer network fibrofelt preparation; the outer green of bamboos is removed, bamboo joints are removed, the obtained bamboos are soaked with a hydrated lime solution, after bamboo chips are softened, the bamboo chips are taken out, flapped, washed, repeatedly rolled by a rolling machine, and combined to remove parenchymatous tissue, and finally long bamboo fiber bundles are obtained; the long bamboo fiber bundles and polymer fiber are opened, scattered and mixed to be uniform, then, wood fiber, the long bamboo fiber bundles and the polymer fiber are mixed, air spreading is adopted to form a net, a needle machine is used for performing needling on the upper and lower faces of a three-dimensional net billet, and the flexible interpenetrating network porous material is obtained. The surface density of the flexible material is not larger than 2,200 g / m<2>, and the needling density of the upper and lower surfaces of the material is larger than 25 pieces / cm<2>. The development for thebamboo fiber industry can be promoted, the bamboo fiber is applied to the field of automobile composite materials, and the new thought is provided for solving the problem of national fiber application.

Description

technical field [0001] The invention relates to a flexible interpenetrating network porous material and a preparation method thereof, in particular to a flexible interpenetrating network porous material which can be used for molding and a preparation method thereof. Based on the molded flexible interpenetrating network porous material, the invention can apply the bamboo fiber to the field of composite materials for vehicles and promote the development of the bamboo fiber industry. Background technique [0002] The past decade is a period of rapid development of China's automobile industry, becoming the world's largest automobile production country. With people's emphasis on environmental protection and the arrival of a large number of car scrapping cycles, the degradability and environmental friendliness of auto parts has become a new focus of the development of my country's auto industry, just like developed countries in Europe and the United States. European countries wit...

AI Technical Summary

Problems solved by technology

In 2000, the European Union issued a guidance document (2000 / 53 / CE), which clearly pointed out that after the vehicle is scrapped, the reusable material must reach 85%. Thermosetting resin is a polymer material that cannot be reused. Currently, only Can be disposed of by deep burial or incineration

During the preparation process of the material, the wood fibers contain one or more of phenolic adhesives, melamine adhesives, and isocyanate adhesives, and the prepared composite material contains a large proportion of non-reusable thermosetting resins and a large amount of The hemp fiber, which brings environmental pollution and strong smell during the production process, prevents this composite material from being widely used in the automotive industry

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