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Straw particle board and preparation method thereof

A particleboard and straw technology, applied in the field of straw particleboard and its preparation, can solve the problems of poor flexural strength and internal bonding strength, and achieve the effects of reduced production cost and good performance.

Inactive Publication Date: 2017-05-10
WUXI MINGSHENG TEXTILE MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its bending strength and internal bonding strength are still relatively poor, which cannot meet the needs of practical applications.

Method used

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  • Straw particle board and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The preparation method of the present embodiment straw particleboard is carried out according to the following steps:

[0031] 1. Spray the mixed solution of phenolic adhesive or glue coupling agent evenly on the straw scrap until it is completely soaked, then cover it at room temperature for 2 hours, then put it in an oven, and dry it at 55-85°C until the moisture content is 10% to 14%, and then paved in the mold to form a slab;

[0032] 2. Cover the upper and lower surfaces of the slab with a steel plate, and then pre-press for 10 to 20 minutes under a pressure of 1 to 3 MPa;

[0033] 3. Dry the pre-pressed slab at 40°C to a moisture content of 5%;

[0034] 4. Evenly cover the surface of the dried slab with a layer of sodium lignosulfonate with a thickness of 1mm, absorb moisture in humid air with a humidity of 80% and a temperature of 65°C until the moisture content reaches 6%;

[0035] 5. Place cushion blocks between the upper and lower steel plates of the slab af...

Embodiment 2

[0045] The preparation method of the present embodiment straw particleboard is carried out according to the following steps:

[0046]1. Spray the mixed solution of phenolic adhesive or glue coupling agent evenly on the straw scrap until it is completely soaked, then cover it at room temperature for 2 hours, then put it in an oven, and dry it at 55-85°C until the moisture content is 10% to 14%, and then paved in the mold to form a slab;

[0047] 2. Cover the upper and lower surfaces of the slab with a steel plate, and then pre-press for 10 to 20 minutes under a pressure of 1 to 3 MPa;

[0048] 3. Dry the pre-pressed slab at 30°C to a moisture content of 2%;

[0049] 4. Evenly cover the surface of the dried slab with a layer of sodium lignosulfonate with a thickness of 3mm, absorb moisture in humid air with a humidity of 100% and a temperature of 60°C until the moisture content reaches 8%;

[0050] 5. Place cushion blocks between the upper and lower steel plates of the slab af...

Embodiment 3

[0054] The preparation method of the present embodiment straw particleboard is carried out according to the following steps:

[0055] 1. Spray the mixed solution of phenolic adhesive or glue coupling agent evenly on the straw scrap until it is completely soaked, then cover it at room temperature for 2 hours, then put it in an oven, and dry it at 55-85°C until the moisture content is 10% to 14%, and then paved in the mold to form a slab;

[0056] 2. Cover the upper and lower surfaces of the slab with a steel plate, and then pre-press for 10 to 20 minutes under a pressure of 1 to 3 MPa;

[0057] 3. Dry the pre-pressed slab at 35°C to a moisture content of 3.5%;

[0058] 4. Evenly cover the surface of the dried slab with a layer of sodium lignosulfonate with a thickness of 2mm, absorb moisture in humid air with a humidity of 100% and a temperature of 62°C until the moisture content reaches 8%;

[0059] 5. Place cushion blocks between the upper and lower steel plates of the slab...

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Abstract

The invention discloses a straw particle board and a preparation method thereof. The method comprises the following steps: 1 spraying a phenolic adhesive or adhesive coupling agent mixed solution onto smashed straws till the smashed straws are completely wetted, stewing the straws, then drying the straws, and paving the straws to form a board blank; 2, covering the board blank with steel plates, and carrying out pre-pressing; 3, drying the pre-pressed board blank at 30 to 40 DEG C till the moisture content is less than 5 percent; 4, uniformly covering the surface of the dried board blank with a layer of sodium lignin sulfonate with the thickness of 1 to 3 mm, and carrying out moisture absorption at the humidity of 80 to 100 percent and the temperature of 60 to 65 DEG C till the moisture content is 6 to 8 percent; and 5, placing cushion blocks at the edges between the upper and lower steel plates of the board blank subjected to the moisture absorption, carrying out thermal pressing, and releasing the pressure to obtain the straw particle board. The straw particle board disclosed by the invention is high in performance and low in cost, and has the bending strength of 20 MPa or above and the internal combination strength of 0.2 to 0.3 MPa.

Description

technical field [0001] The invention belongs to the technical field of particleboard preparation, and relates to a straw particleboard and a preparation method thereof. Background technique [0002] my country is a large agricultural country, and the amount of crop straw produced every year is about 700 million tons, including about 200 million tons of corn, sorghum, cotton and other straws, about 400 million tons of wheat straw and rice straw, and the total amount available for collection is 600 million tons t above. The utilization rate of straw in our country is low, and a large amount of straw is burned, which not only pollutes the environment, but also wastes valuable renewable resources. If 5% of the total amount of rice straw and wheat straw is used, about 20 million m 3 Wood-based panels can replace 60 million m3 of wood, which is equivalent to the total output of particleboard, medium-density fiberboard and blockboard in my country in 2003. If straw can be used inst...

Claims

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Application Information

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IPC IPC(8): B27N3/02B27N1/02B27N3/10B27N3/00B27N3/18B27N3/20
CPCB27N3/02B27N1/0209B27N3/002B27N3/10B27N3/18B27N3/203
Inventor 张达明
Owner WUXI MINGSHENG TEXTILE MACHINERY
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