A method for preparing straw particle board

Abstract

The invention discloses a straw particle board manufacture method, which relates to a particle board manufacture method. The invention solves the problem that the straw surface includes a plurality of waxy layers and SiO2 substance, common urea formaldehyde resin glue and phenolic resin are hard to wet the straw surface to cause a plurality of gluing difficulty. The invention has the method that: the straw is cut into pieces and performed ash removal at first, and straw crushed aggregates which are performed with the pretreatment through the blending ratio of the 1:4 to 5.0 according to the mass ratio of the straw and alkali liquor is soaked in the alkali liquor of 1.4 to 1.6 wt percent (mass) for 10 to 15 hours, and the straw particle board can be manufactured after drying, glue applying, paving, pre-pressing, hot pressing, and cooling. The equipment performance request of the straw particle board manufacture through the invention is low, the method is simple, and the operation parameter is easy to control. The method of the invention for performing chemical treatment to the straw raw material surface improves the wetting property of the raw material, greatly enhances the inner combination intensity, enlarges the application scope of the straw, releases the lack of the timber resources, and the invention has great economic and social efficiency in the situation that the conflict between supply and demand becomes more prominent.

Description

technical field [0001] The invention relates to a method for manufacturing particle boards. Background technique [0002] my country is a country with poor forests, and the contradiction between timber supply and demand is very prominent. my country is also a large agricultural country. The annual output of crop straw reaches 600 million tons, and a large amount of unused straw is burned, causing great pollution to the environment. Crop straw contains a large amount of grass fibers, bast fibers, etc., which can be used as wood substitutes to produce various wood-based panel products. Therefore, the industrial development and utilization of crop straw has great economic and social significance. Compared with the traditional production methods of wood particleboard and medium density fiberboard, straw-based panels have a problem in the production technology. Due to the high content of silicon dioxide and wax layer in the straw, it is difficult for the commonly used urea-formal...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve when making straw particle board, because the structural feature and chemical composition of straw cell are basically the same as wood, its surface contains a large amount of wax layer and SiO 2 Substances, commonly used urea-formaldehyde resin glue and phenolic resin are difficult to wet the surface of straw, resulting in the difficulty of gluing, and the overall performance of the board is difficult to meet the requirements of national standards; and a method for manufacturing straw particle board is provided

The present invention adopts isocyanate glue and urea-formaldehyde resin glue to sizing straw scrap twice to make straw particle board, one is to reduce the problem of high cost of using isocyanate glue alone for sizing, and the other is to solve the problem of using urea-formaldehyde resin alone for sizing The problem that the strength of the straw particle board is not up to the standard