Method for preparing base material of composite floor by adopting corn straw skins

Abstract

The invention discloses a method for preparing a base material of a composite floor by adopting corn straw skins, relating to the method for preparing the base material of the composite floor. The invention aims to solve the problems of low internal bonding strength, low static bending intensity, low elasticity modulus and low water absorption thickness expansion rate existing in the prior art for preparing micron order long flakes light artificial board. The method comprises the following steps of: performing preliminary skin-flesh separation on corn straws, then performing mechanical crushing and screening, and performing the skin-flesh separation again by using a stepped screening winnowing technology to obtain crushed aggregates of the corn straw skins; uniformly spraying a modified isocyanate adhesive to the crushed aggregates of the corn straw skins, and paving the crushed aggregates into plate blanks with the same thickness; performing pre-pressing treatment on the plate blanks, then performing hot-pressing on the prepressed plate blanks to obtain corn straw skin plates, and finally obtaining the base material of the composite floor after aging treatment. The method is mainly applied to the preparation of the base material of the composite floor by adopting the corn straw skins.

Description

technical field [0001] The invention relates to a preparation method of a composite floor base material. Background technique [0002] my country is a country that is relatively short of timber resources in the world. The forest coverage rate is only equivalent to 3 / 5 of the world's average level, and the per capita forest area is less than 1 / 4 of the world's average level. With the continuous increase of wood consumption, the contradiction between supply and demand has become increasingly prominent. The main source of the existing composite floor substrate is wood. Although wood is a renewable resource, due to the long growth cycle, the source of wood is seriously restricted. Therefore, the consumption of wood continues to increase. At the same time, the price of wood is rising year by year. Moreover, such a large amount of wood consumption will inevitably destroy more forests; and my country is a large agricultural country, with more than 700 million tons of crop straw alo...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problems of low internal bonding strength, low static bending strength, low elastic modulus, and low water-absorbing thickness expansion rate of the existing micron-sized long flake shaving light-weight wood-based panels, and provides a method prepared by using corn straw husks. Laminate Flooring Substrate Method

[0006] Advantages of the present invention: 1. The present invention uses corn stalks as raw materials to prepare composite floor substrates, and rationally utilizes waste agricultural residue resources, which not only reduces the preparation cost of composite floor substrates, but also solves the problem of shortage of raw materials; 2. , The density of the composite floor substrate prepared by the present invention is 0.8g / cm 3 ~1.0g / cm 3 , The static bending strength is 26.25MPa~38.49MPa, the bending elastic modulus is 2423.37MPa~2981.97MPa, the internal bonding strength is 0.85MPa~1.31MPa, and the water absorption thickness expansion rate is 8.37%~15.33%, so all performance indicators are in line with Performance indicators of floor substrates