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Production method of light particle board

A production method and particleboard technology, which are applied in the production of particleboard and the production of light-weight particleboard, can solve the problems of difficult handling and processing of particleboard, poor dimensional stability, etc.

Inactive Publication Date: 2018-02-09
DARE WOOD BASED PANEL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the particleboard in this density range is not only difficult to handle and process, but also has poor dimensional stability.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A kind of production method of lightweight particleboard, comprises the following steps:

[0023] A. Preparation of shavings: the surface layer is common wood shavings, and the core layer of shavings is corn stalk shavings and pennisetum straw shavings. It accounts for 80% of the mass of core shavings, and Pennisetum straw shavings accounts for 20% of the mass of core shavings;

[0024] B. Drying: Dry the material to a moisture content of 2.0%;

[0025] C. Glue mixing: apply 8% MUF resin (solid content 53.5%) and 1% emulsified paraffin to the dried surface shavings, and apply 3% MUF resin (solid content) to the core shavings. 63%), 2.0% MDI resin, 1% molten paraffin and 0.3% curing agent (20% ammonium chloride solution);

[0026] D. Pavement and pre-pressing: the quality of surface shavings accounts for 20% of the total shavings, and the core layer accounts for 80% of the total shavings; according to the board density of 0.50g / cm 3 Set the paving weight, and pave int...

Embodiment 2

[0030] A kind of production method of lightweight particleboard, comprises the following steps:

[0031] A. Preparation of shavings: the surface layer is common wood shavings, and the core layer of shavings is corn stalk shavings and pennisetum straw shavings. It accounts for 70% of the mass of core shavings, and Pennisetum straw shavings accounts for 30% of the mass of core shavings;

[0032] B. Drying: Dry the material to a moisture content of 2.0%;

[0033] C. Glue mixing: Apply MUF resin (solid content 53.5%) and 1% emulsified paraffin to the dried surface shavings, and apply 2% MUF resin (solid content) to the core shavings. 63%), 3.0% MDI resin, 1% molten paraffin and 0.3% curing agent (20% ammonium chloride solution);

[0034] D. Pavement and pre-pressing: the quality of surface shavings accounts for 25% of the total shavings, and the core layer accounts for 75% of the total shavings; according to the board density of 0.45g / cm 3 Set the paving weight, and pave into a...

Embodiment 3

[0038] A kind of production method of lightweight particleboard, comprises the following steps:

[0039] A. Preparation of shavings: the surface layer is common wood shavings, and the core layer of shavings is corn stalk shavings and pennisetum straw shavings. It accounts for 50% of the mass of core shavings, and Pennisetum straw shavings accounts for 50% of the mass of core shavings;

[0040] B. Drying: Dry the material to a moisture content of 2.0%;

[0041] C. Glue mixing: Apply MUF resin (solid content 53.5%) and 1% emulsified paraffin to the dried surface shavings, and apply 0% MUF resin (solid content) to the core shavings. 63%), 5% MDI resin, 1% molten paraffin and 0.3% curing agent (20% ammonium chloride solution);

[0042] D. Pavement and pre-pressing: the quality of surface shavings accounts for 30% of the total shavings, and the core layer accounts for 70% of the total shavings; according to the board density of 0.40g / cm 3 Set the paving weight, and pave into a s...

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Abstract

The invention belongs to the technical field of artificial boards, and relates to production of particle boards, in particular to a production method of a light particle board. The production method of the light particle board comprises the steps of: shaving preparation, drying, glue stirring, pavement, prepressing and hot pressing; a surface layer adopts common wood fine shavings; core layer shavings are corn straw shavings and pennisetum alopecuroides straw shavings; and the hot pressing process is to hot press a prepressed board blank at a temperature of 170-190 DEG C under a pressure of 2.5-3.5 MPa for 3-6 min. Light materials are used as raw materials; and a production process is improved to produce the light particle board. Based on a traditional particle board production process, the core layer shavings are changed from common wood shavings to the corn straw shavings and the pennisetum alopecuroides straw shavings with lower density and bulk density; MDI resins are added in a core layer; and the use level of MUF resins is reduced to reduce influence on the board density by adhesive and to improve overall board physical performances. The light particle board, whose density iswithin 0.38-0.50 g / cm3 and physical and chemical indexes both meet national standard requirements, can be manufactured by the production method.

Description

technical field [0001] The invention belongs to the technical field of wood-based panels, relates to the production of particle boards, in particular to a production method of lightweight particle boards. Background technique [0002] Traditional wood-based panels are made of wood or other non-wood plant fibers, which are mechanically crushed or chemically processed, separated into various unit materials, and then hot-pressed with (or without) adhesives and other additives. Because the density of most wood exceeds 0.4g / cm 3 , plus the density of most adhesives exceeds 1.0g / cm 3 , the density of the mixed and pressed boards is mostly difficult to achieve less than 0.6g / cm 3 value. In the past ten years, due to the rise of architectural decoration and furniture industries, the market demand for panels with small specific gravity has become more and more extensive. Many applications of wood-based panels do not require high strength of the board, but require light weight of ...

Claims

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Application Information

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IPC IPC(8): B27N3/10B27N3/14B27N3/18B27N1/02B27L11/02
Inventor 王俊伟陈秀兰王丽
Owner DARE WOOD BASED PANEL GRP
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