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Straw plate and preparing method thereof

A technology of straw and wheat straw, which is applied in the field of straw board and its preparation, can solve the problems of weak bonding strength and low bonding strength

Inactive Publication Date: 2015-04-22
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two kinds of straw are mainly composed of cellulose, hemicellulose, lignin and extract. The inner layer is soft and less dense, but the outer surface of the straw is rich in waxy substances and contains a certain amount of silicon dioxide. In the process of straw board production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1, a kind of rice straw board and its preparation

[0014] Crush the one-year-old rice straw into straw scraps of about 0.5 cm, put the straw scraps into a steamer and cook for 20 minutes to fully remove the waxy substance and pectin on the surface of the straw, and dry the straw after heat treatment The straw scraps are dried in a dryer.

[0015] Put the straw fragments after the heat treatment and drying into an iron bucket with a heating device, and add water and 0.1% mass fraction (calculated by the volume of hot water) of KH550 respectively. Then the straw scraps were added thereinto, and the temperature was raised to 60° C. and stirred slightly for 1 hour, and then the straws were pulled out and dried, and the surface-treated straw scraps were pulverized into fiber powder with a mixer.

[0016] The urea-formaldehyde rubber powder purchased in the market and water are formulated into urea-formaldehyde glue according to the weight ratio of 100:60. The t...

Embodiment 2

[0017] Embodiment 2, the preparation of a kind of wheat straw board

[0018] Use a pulverizer to process the wheat straw into straw fragments with a length of about 1 cm, put the straw fragments into a steamer and cook for 20 minutes to fully remove the wax, and put the processed straw fragments into a dryer to dry.

[0019] Put the straw fragments obtained above into an iron drum with a heating device, and add water and 0.2% mass fraction (calculated by volume of hot water) of silane coupling agent KH560 respectively. Then the straw scraps were added therein, and the temperature was raised to 60° C. and lightly stirred for half an hour. Subsequently, the surface-treated straw fragments are pulverized into fiber powder with a mixer.

[0020] The urea-formaldehyde rubber powder and water purchased in the market are formulated into urea-formaldehyde glue according to the weight ratio of 100:60. The treated straw fiber powder and urea-formaldehyde glue are mixed evenly with a m...

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Abstract

The invention provides a preparing method for a rice or wheat straw plate. In the preparing process, straw is treated through a wet chemistry method to improve the bonding strength of the straw and adhesive. The specific preparing process comprises the following steps that 1, the rice or wheat straw is smashed; 2, smashed straw materials are placed into a steamer for stewing so that wax-like substances, pectin and the like on the surface of the straw can be steamed out; 3, the smashed straw materials are placed into an iron barrel with a heating device, water and a silane coupling agent are added into the smashed straw materials, and stirring is carried out in a temperature control mode; 4, the straw with the treated surface is dried and smashed into the fiber powder shape; 5, the treated straw fiber powder and urea-formaldehyde resin adhesive are mixed uniformly by utilizing a multifunctional stirrer, and a mixture is placed into a plate pressing machine to be formed in a heat pressing mode to prepare the straw plate. According to the method, the silane coupling agent is used for modifying the surface of the straw, the bonding force of the straw and the adhesive is reinforced, and therefore the strength of the straw plate is improved.

Description

technical field [0001] The invention relates to a method for producing and preparing straw boards by utilizing food crop straw, especially rice or wheat straw. Background technique [0002] China is a large agricultural country, which produces a large amount of crop straw resources every year while producing agricultural products. According to statistics, the annual output of crop straw in the country is about 700 million tons. Crop straw is the stalk of annual herbaceous plants, and the raw material cycle is much shorter than that of wood. If straw resources can be used to produce wood-based panels, it can save a lot every year. of wood. In addition, straw burning has always been one of the important causes of environmental pollution. The production of straw boards can provide farmers with a suitable way to turn waste straw into treasure, so as to prevent straw burning from the perspective of economic benefits. [0003] my country's research on straw-based panels began in...

Claims

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Application Information

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IPC IPC(8): B27N1/00B27N1/02B27N3/10
CPCB27N1/00B27N1/0209
Inventor 王利魁王洪刘云姚伯龙
Owner JIANGNAN UNIV
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