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Method for producing environment-friendly density boards, and special medium-low temperature solidifying agent

A curing agent, MDF technology, used in applications, adhesives, household components, etc., can solve problems such as prolonging curing time, reducing product output and quality, and improving service life, avoiding equipment aging, and ensuring physical and mechanical properties and use. performance effect

Active Publication Date: 2015-05-13
WENAN COUNTY TIANHUA DENSITY BOARD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adding less will also prolong the curing time and reduce product yield and quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Mix 50kg ammonium bisulfate, 100kg ammonium polyphosphate, 2kg sodium lauryl sulfate, and 848kg water to form a special medium and low temperature curing agent solution.

[0017] In the production of MDF fiberboard, the special medium and low temperature curing agent solution is added in the process of spraying under pressure during the sizing process of wood chip fibers; the wood chip fibers are ordinary alkaline wood chips; The ratio of glue quality is 4-7:100; the applied glue is urea-formaldehyde glue.

[0018] The average temperature of the hot pressing plate is 170-190°C.

Embodiment 2

[0020] Mix 80kg ammonium bisulfate, 100kg ammonium polyphosphate, 2kg sodium lauryl sulfate, and 818kg water to form a special medium and low temperature curing agent solution.

[0021] In the production of MDF fiberboard, the special medium and low temperature curing agent solution is added in the process of sizing the wood chip fiber by pressurized spraying; the wood chip fiber is highly alkaline wood chips; the quality of the special medium and low temperature curing agent solution is related to the sizing process. The mass ratio is 5-9:100; the applied glue is urea-formaldehyde glue.

[0022] The outlet temperature of the heat transfer oil of the heat press is controlled at 205 degrees.

Embodiment 3

[0024] Mix 120kg ammonium bisulfate, 100kg ammonium polyphosphate, 2kg sodium lauryl sulfate, and 778kg water to form a special medium and low temperature curing agent solution.

[0025] In the production of MDF fiberboard, it is used for the production of E1 grade boards. The special medium and low temperature curing agent solution is added in the process of spraying under pressure during the sizing process of wood chip fibers; the quality of the special medium and low temperature curing agent solution and the quality of sizing The ratio is 5-11:100; the glue applied is urea-formaldehyde glue.

[0026] The outlet temperature of the heat transfer oil of the heat press is controlled at 205 degrees.

[0027] Compared with the ammonium chloride curing agent of the background technology, the special medium and low temperature curing agent of the present invention has a simple production effect, and can maintain the physical and mechanical properties and use performance of the prod...

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Abstract

The invention relates to a method for producing environment-friendly density boards, and a special medium-low temperature solidifying agent, and belongs to the technical field of the production of medium density fiberboards. The technical scheme of the method lies in that the method comprises the following steps: mixing ammonium bisulfate and ammonium polyphosphate, wherein the mass proportion of the ammonium bisulfate to the ammonium polyphosphate is 0.6-1.5, a liquid water solution with different pH values is formed according to different proportions, the mass concentration of the ammonium bisulfate in the liquid water solution is 5-20%, and the mass concentration of the ammonium polyphosphate in the liquid water solution is 3-25%; determining the pH value of the liquid water solution according to the pH value of wood fibers of fiberboards of density boards in production, wherein the pH value of the wood fibers is 7.5-8, and the pH value of the corresponding liquid water solution is 5.2-6.0. According to the method disclosed by the invention, the production capacity is not lowered under the condition of lower than 30 DEG C by the same proportion, and besides, the application effects of physical and mechanical properties and using properties of products can be guaranteed; under the production condition of medium-low temperature and in the use of the special medium-low temperature solidifying agent, the degree of acidity cannot cause larger influence on devices, the low-temperature high-speed operation of the production line can be realized, and the service lives of the devices are prolonged.

Description

technical field [0001] The invention relates to a method for producing an environment-friendly density board and a special medium-low temperature curing agent, belonging to the technical field of medium density board production. Background technique [0002] MDF fiberboard is made of wood fiber or other plant fiber, and is made of urea-formaldehyde resin or other suitable adhesives, with a density of 0.5-0.88g / cm 3 of plates. The density of medium density board is close to that of wood. Because it is made by adding wood fiber into adhesive through high temperature and high pressure, its density is relatively uniform, and its mechanical properties are close to that of wood. It is a popular artificial board in the world. At present, the MDF production process in the background technology adopts relatively high temperature, and the hot press in the production line is heated by heat transfer oil. Due to the obvious competitive advantage brought by the output, in order to increa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J11/04C09J11/06C09J161/24B27N3/04
Inventor 王锌王文昌
Owner WENAN COUNTY TIANHUA DENSITY BOARD
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