Preparation method for density-controllable light bamboo-wood-based fiber plate

A fiberboard and lightweight technology, applied in the field of lightweight fiberboard, can solve problems such as increased operational complexity, prolonged hot pressing time, and difficult foaming process parameters, so as to achieve good practical application value and promotion value, improve controllability, reduce effect of complexity

Active Publication Date: 2018-03-20
FUJIAN AGRI & FORESTRY UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Existing lightweight fiberboard materials use low-density fast-growing wood as raw materials, add adhesives such as modified urea-formaldehyde resin, phenolic resin or isocyanate, and combine foaming technology in the hot-pressing process of the board to achieve light weight, that is, in the fiber and fiber Micropores are formed between them to reduce weight. Most of the current technologies focus on the innovative research of the hot pressing-foaming composite process. The bottleneck is that the hot pressing process is relatively modelized. The hot pressing time is relatively prolonged, and the processing efficiency is low
In addition, if processing lightweight fiberboard materials with various densities, it is necessary to repeatedly adjust the hot pressing parameters, which increases the complexity of the operation, and the product density cannot be adjusted

Method used

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  • Preparation method for density-controllable light bamboo-wood-based fiber plate
  • Preparation method for density-controllable light bamboo-wood-based fiber plate

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Experimental program
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Effect test

Embodiment 1

[0029] Embodiment 1: a kind of preparation method of density-controllable lightweight bamboo-based fiberboard, comprises the following steps:

[0030] 1. Preparation of thermosetting phenolic resin:

[0031] Take a certain amount of phenol and formaldehyde solution with a molar ratio of 1:1.6 in the reactor, then add a certain amount of sodium hydroxide with a molar ratio of 0.35:1 to phenol as a catalyst, heat and stir at a rate of 4°C / min Raise the temperature to 90°C, react at constant temperature for 120 minutes, add hydrochloric acid to adjust the pH value to 6.8~7.2, and vacuum dehydrate when the temperature is lowered to 70°C to obtain a thermosetting phenolic resin, which is ready for use;

[0032] 2. Preparation of bamboo powder phenolic resin composite foam particles:

[0033] 2.1, processing bamboo slices: select 3-5 year old moso bamboo, carry out slice processing by slicer, remove bamboo green and bamboo yellow, then carry out pulverization with pulverizer;

[0...

Embodiment 2

[0042] Embodiment 2: a kind of preparation method of density-controllable lightweight bamboo-based fiberboard, comprises the following steps:

[0043] 1. Preparation of thermosetting phenolic resin:

[0044] Take a certain amount of phenol and formaldehyde solution with a molar ratio of 1:1.6 in the reactor, then add a certain amount of sodium hydroxide with a molar ratio of 0.35:1 to phenol as a catalyst, heat and stir at a rate of 4°C / min Raise the temperature to 90°C, react at constant temperature for 120 minutes, add hydrochloric acid to adjust the pH value to 6.8~7.2, and vacuum dehydrate when the temperature is lowered to 70°C to obtain a thermosetting phenolic resin, which is ready for use;

[0045] 2. Preparation of bamboo powder phenolic resin composite foam particles:

[0046] 2.1, processing bamboo slices: select 3-5 year old moso bamboo, carry out slice processing by slicer, remove bamboo green and bamboo yellow, then carry out pulverization with pulverizer;

[0...

Embodiment 3

[0055] Embodiment 3: a kind of preparation method of density-controllable lightweight bamboo-based fiberboard, comprises the following steps:

[0056] 1. Preparation of thermosetting phenolic resin:

[0057] Take a certain amount of phenol and formaldehyde solution with a molar ratio of 1:1.6 in the reactor, then add a certain amount of sodium hydroxide with a molar ratio of 0.35:1 to phenol as a catalyst, heat and stir at a rate of 4°C / min Raise the temperature to 90°C, react at constant temperature for 120 minutes, add hydrochloric acid to adjust the pH value to 6.8~7.2, and vacuum dehydrate when the temperature is lowered to 70°C to obtain a thermosetting phenolic resin, which is ready for use;

[0058] 2. Preparation of bamboo powder phenolic resin composite foam particles:

[0059] 2.1, processing bamboo slices: select 3-5 year old moso bamboo, carry out slice processing by slicer, remove bamboo green and bamboo yellow, then carry out pulverization with pulverizer;

[0...

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Abstract

The invention relates to a preparation method for a density-controllable light bamboo-wood-based fiber plate. The method comprises the steps that firstly, thermosetting phenolic resin is prepared; secondly, bamboo powder phenolic resin composite foam particles are prepared, then, fir wood fiber, paraffin and the bamboo powder phenolic resin composite foam particles are placed into a mixer, next, amodified urea-formaldehyde resin adhesive is sprayed, and paving is performed after the mixture is uniformly stirred; thirdly, the mixture is placed into a pre-presser for prepressing, and then the product is moved into a hot press to be subjected to hot-pressing treatment; and finally, the product is subjected to pressure relief, cooling, plate cutting and maintenance, and the density-controllable light bamboo-wood-based fiber plate is obtained. According to the method, bamboo powder and the phenolic resin are processed into a foam particle composite system by means of the special treatmenttechnology, and the foam particle composite system is used for replacing a part of layer structures of the fiber plate material; and the purpose of weight reduction is achieved by enhancing the porosity of the original material system, the complexity of the processing technique is effectively lowered, and the controllability of the processing technique and the regulation of the product density areimproved.

Description

technical field [0001] The invention belongs to the technical field of lightweight fiberboards, in particular to a method for preparing a density-controllable lightweight bamboo-based fiberboard. Background technique [0002] Existing lightweight fiberboard materials use low-density fast-growing wood as raw materials, add adhesives such as modified urea-formaldehyde resin, phenolic resin or isocyanate, and combine foaming technology in the hot-pressing process of the board to achieve light weight, that is, in the fiber and fiber Micropores are formed between them to reduce weight. Most of the current technologies focus on the innovative research of the hot pressing-foaming composite process. The bottleneck is that the hot pressing process is relatively modelized. The hot pressing time is relatively prolonged, and the processing efficiency is low. In addition, if processing lightweight fiberboard materials with various densities, it is necessary to repeatedly adjust the hot-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27N3/04B27N3/08B27N1/00B27L11/06B27K9/00B27K5/00B27K5/04C08L97/02C08L61/06C08L91/06C08L61/24C08G8/10
CPCB27K5/00B27K5/0055B27K5/0085B27K5/04B27K9/002B27K2200/15B27L11/06B27N1/00B27N3/04B27N3/08C08G8/10C08L97/02C08L2205/02C08L2205/025C08L2205/035C08L2205/16C08L61/06C08L91/06C08L61/24
Inventor 关鑫俞西雅
Owner FUJIAN AGRI & FORESTRY UNIV
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