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Low glue consumption method for making medium density fiberboard

A manufacturing method and fiberboard technology, which can be applied to flat products, household components, household appliances, etc., can solve problems such as environmental pollution, and achieve the effects of reducing the amount of glue applied, the cost of sheet manufacturing, and the amount of formaldehyde released.

Inactive Publication Date: 2012-06-27
广西新凯骅实业集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, due to the application of urea-formaldehyde resin glue in the production of MDF, free formaldehyde will be released during its manufacture and use, which will pollute the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The specific method is as follows:

[0025] 1. Prepare materials

[0026] Drum chippers are used to process raw materials such as small-diameter wood and branch wood into wood chips with specifications of length: 16-30mm, width: 15-30mm, and thickness: 3-6mm. Purify the wood chips through a roller screen to remove unqualified wood chips and bark in the wood chips;

[0027] 2. Fiber preparation

[0028] The qualified wood chips are sent to the wood chip cooking tank through the belt conveyor. Filter the papermaking waste liquid and introduce it into the boiler to prepare saturated steam with a steam pressure of 0.6MPa. Then, the saturated steam is introduced into the wood chip cooking tank to cook and soften the wood chips. The temperature in the cooking tank is 160° C., and the treatment time is 6 minutes. The wood chips after cooking and preheating are sent to the heat mill through the feeding screw for mechanical separation to prepare wood fibers. Before the wood...

Embodiment 2

[0038] The specific method is as follows:

[0039] 1. Prepare materials

[0040] Drum chippers are used to process raw materials such as small-diameter wood and branch wood into wood chips with specifications of length: 16-30mm, width: 15-30mm, and thickness: 3-6mm. Purify the wood chips through a roller screen to remove unqualified wood chips and bark in the wood chips;

[0041] 2. Fiber preparation

[0042] The qualified wood chips are sent to the wood chip cooking tank through the belt conveyor. Filter the papermaking waste liquid and introduce it into the boiler to prepare saturated steam with a steam pressure of 0.7MPa. Then, the saturated steam is introduced into the wood chip cooking tank to cook and soften the wood chips. The temperature in the cooking tank is 175° C., and the treatment time is 8 minutes. The wood chips after cooking and preheating are sent to the heat mill through the feeding screw for mechanical separation to prepare wood fibers. Before the wood...

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Abstract

The invention relates to a low glue consumption method for making a medium density fiberboard, which comprises the following steps of: material preparation, i.e. processing the raw materials of small dimension wood, brush wood and the like into wood chips by adopting a drum chipper; fiber preparation, i.e. sending qualified wood chips to a wood chip cooking pot through a belt conveyor, introducing papermaking waste liquid into a boiler to carry out cooking softening treatment after filtering the papermaking waste liquid, sending the wood chips which are cooked and preheated into a thermofiner to carry out mechanical separation through a feeding screw, and filling molten wax before the wood chips enter a grinding chamber body of the thermofiner, so that after the wood chips are separated into the fibers, the wax is uniformly distributed on the surfaces of the fibers; sizing and drying of the fibers, wherein a production process of firstly sizing and then drying is adopted; pavement and formation of a board blank; hot-press forming, i.e. sending the single board blank into a hot press to carry out hot pressing through a loader, so that under the combined action of heat and pressure, moisture in the board blank is gasified and evaporated, the density of the board blank is improved, glue is cured and a waterproof agent is redistributed; and post-processing, i.e. finally, sending the obtained product into a sanding machine to carry out surface processing. The low glue consumption method for making the medium density fiberboard is simple and convenient.

Description

technical field [0001] The invention belongs to the field of wood-based board manufacturing, in particular to a method for manufacturing medium-density fiberboards with low sizing amount. Background technique [0002] Medium density fiberboard is one of the important varieties of wood-based panels. It has uniform internal structure, moderate density and good dimensional stability. It can be widely used in furniture and interior decoration and other fields. At present, urea-formaldehyde resin is used as an adhesive in the production of medium density fiberboard. About 170kg of urea-formaldehyde resin adhesive is needed to produce 1 cubic meter of medium density fiberboard, and the cost of adhesive accounts for about one-third of the production cost of medium density fiberboard. At the same time, due to the application of urea-formaldehyde resin glue in the production of MDF, free formaldehyde will be released during its manufacture and use, which will pollute the environment....

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27N3/04
Inventor 崔永和郑霞韦丰
Owner 广西新凯骅实业集团股份有限公司
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