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A kind of preparation method of lightweight particle board

A technology of particleboard and shavings, applied in the direction of manufacturing tools, flat products, pretreatment of molding materials, etc., can solve problems such as difficult to meet high-performance lightweight particleboard, and achieve the effect of increasing fluidity

Active Publication Date: 2022-03-11
GUANGXI FORESTRY RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Disclosed a kind of production method of light-weight particleboard as CN107671979A, this method adopts traditional improved hot-pressing process, prepares light-weight particleboard with light-weight material (corn stalk shavings and Pennisetum stalk shavings with lower density) as core layer shavings , the production process is simple, only by adding MDI resin to improve the performance of the board, it is difficult to meet the needs of preparing high-performance lightweight particleboard

Method used

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  • A kind of preparation method of lightweight particle board

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Effect test

Embodiment 1

[0040] A preparation method for lightweight particleboard, comprising the steps of:

[0041] (1) Preparation of shavings: select core shavings and surface shavings respectively according to requirements; the tree species of the shavings is pine; the air-dry density range of the tree species is 0.40~0.6g / cm 3 The particle size of the core layer is 4.0-6.8:1 in aspect ratio; 14.0-30.2:1 in aspect ratio; 5.7-13.2:1 in width-thickness ratio;

[0042] (2) Preparation of foaming adhesive: preparation of urea-formaldehyde resin foaming adhesive;

[0043](3) Wood shavings are dried: the shavings are dried, and the shape of the shavings is kept intact during drying, and the moisture content of the shavings after drying is 1%;

[0044] (4) Shaving sizing: use urea-formaldehyde resin foaming adhesive for sizing;

[0045] The specific operation of the urea-formaldehyde resin foaming adhesive sizing is as follows: the dried surface shavings are sprayed with B component and water, and the...

Embodiment 2

[0055] A preparation method for lightweight particleboard, comprising the steps of:

[0056] (1) Preparation of shavings: select core shavings and surface shavings respectively according to requirements; the species of the shavings is poplar; the air-dry density range of the species is 0.50g / cm 3 The particle size of the core layer is 4.2-7.0:1 in aspect ratio; 14.2-33.2:1 in aspect ratio; 6.7-13.3:1 in width-thickness ratio;

[0057] (2) Preparation of foaming adhesive: preparation of polyurethane foaming adhesive;

[0058] (3) Drying of shavings: drying the shavings, keeping the shape of the shavings intact during drying, and the moisture content of the shavings after drying is 2%;

[0059] (4) Shaving sizing: use polyurethane foam adhesive for sizing;

[0060] The specific operation of sizing the polyurethane foaming adhesive is as follows: spray D component and water on the dried surface shavings, the mass ratio of surface shavings, D component and water is 100:3:10; the...

Embodiment 3

[0072] A preparation method for lightweight particleboard, comprising the steps of:

[0073] (1) Preparation of shavings: select core shavings and surface shavings respectively according to requirements; the shaving species are pine, poplar or fir; the air-dry density of the species ranges from 0.35 to 0.60 g / cm 3 The particle size of the core layer is 4.0-7.0:1 in aspect ratio; 14.5-33.0:1 in aspect ratio; 8.8-13.3:1 in width-thickness ratio;

[0074] (2) Preparation of foaming adhesive: preparation of urea-formaldehyde resin foaming adhesive;

[0075] (3) shavings drying: drying the shavings, keeping the shape of the shavings intact during drying, and the moisture content of the shavings after drying is 3%;

[0076] (4) Shaving sizing: use urea-formaldehyde resin foaming adhesive for sizing;

[0077] The specific operation of the urea-formaldehyde resin foaming adhesive sizing is as follows: the dried surface shavings are sprayed with B component and water, and the mass ra...

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Abstract

The invention belongs to the technical field of particleboard research and development, and in particular relates to a preparation method of lightweight particleboard. A preparation method for lightweight particleboard, comprising the following steps: (1) preparation of particleboard; (2) preparation of foaming adhesive; (3) drying of particleboard; (4) sizing of particleboard; Pressing; (6) hot pressing. During the hot pressing process of the slab, according to the foaming temperature of the foaming adhesive and the curing temperature of the adhesive, a pressurization-relieving-repressurization or pressure-holding process is adopted, and the pressure is released to ensure that the foaming agent decomposes to generate gas, thereby The adhesive is rapidly foamed, and then pressurized to compress the slab to the target thickness. The lightweight particleboard prepared by this process has the advantages of "light weight and high strength".

Description

technical field [0001] The invention belongs to the technical field of particleboard research and development, and in particular relates to a preparation method of lightweight particleboard. Background technique [0002] In recent years, with the rapid development of my country's custom home furnishing industry, the market demand for particleboard has increased significantly. At present, the density of particleboard products for furniture produced and sold in my country is mostly 620-720kg / m 3 . Particleboards in this density range have relatively high costs during processing, transportation and use due to their high density. With the shortage of wood resources and the increasing demand for raw materials for wood-based panels, lightweight has gradually become a development trend. Replacing ordinary particleboard with lightweight particleboard as non-structural furniture and decorative panels not only saves wood resources, but also reduces processing energy consumption and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27N1/02B27N3/10B27N3/14
CPCB27N1/0209B27N3/14B27N3/10
Inventor 王军锋黄腾华宋恋环雷福娟胡拉陈松武栾洁秦理哲陈桂丹
Owner GUANGXI FORESTRY RES INST