Particle board and preparation method and application thereof

A technology of particleboard and shavings, which is applied in the field of particleboard and its preparation, can solve the problems of insufficient initial viscosity of isocyanate adhesives, moisture absorption thickness expansion, etc., and achieve the effect of avoiding pretreatment process, reducing expansion rate and reducing release amount

Active Publication Date: 2020-05-08
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The particle board uses bulk solid waste as raw materials, and by compounding urea-formaldehyde adhesives, isocyanate adhesives and beeswax emulsion additives, it solves the problems of free formaldehyde release from urea-formaldehyde adhesives and insufficient initial viscosity of isocyanate adhesives. Technical Problems of Hygroscopic Thickness Expansion of Nutshell Particleboard

Method used

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  • Particle board and preparation method and application thereof
  • Particle board and preparation method and application thereof
  • Particle board and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] 1. Shavings: use a ring-type flaking machine to shavings to obtain powdery and massive shavings, and the size distribution of the shavings ranges from 0.15 to 4.00mm.

[0030] 2. Drying: Dry the Camellia oleifera husk shavings obtained by flaking to a moisture content of less than 4.0% in a single-channel drum-type hot-smoke dryer. is 130°C.

[0031] 3. Sieving: Sieve the dried shavings to obtain 35-140 mesh shavings for the surface layer and 5-60 mesh shavings for the core layer. The sizes of the shavings for the surface layer and the core layer are respectively 0.15~0.5mm and 0.25~4mm, the sieving statistics of shavings are shown in Table 1 below.

[0032] 4. Pneumatic separation: The sieved surface shavings and core shavings are separated by air to remove impurities, stones and metal blocks, and then transported to the surface shavings silo and core shavings silo for standby.

[0033] 5. Mixing and sizing: After the air-sorted shavings are quantitatively measured, ...

Embodiment 2

[0042] 1. Shavings: Use a hammer flaker to shave to obtain powdery and blocky shavings, and the size distribution of the shavings ranges from 0.15mm to 4.00mm.

[0043] 2. Drying: Dry the Camellia oleifera husk shavings obtained by shavings to a moisture content of less than 4.0% in a single-channel drum-type hot-smoke dryer. is 125°C.

[0044] 3. Sieving: Sieve and sieve the dried shavings to obtain 35-140 mesh shavings for the surface layer and 5-60 mesh shavings for the core layer. 0.15~0.5mm and 0.25~4mm, the sieving statistics of shavings are shown in Table 3 below.

[0045] 4. Pneumatic sorting: The sieved surface and core shavings are separated by pneumatic separation to remove impurities, stones and metal blocks, and then transported to the surface shaving silo and core shaving silo for standby.

[0046] 5. Mixing and sizing: After the air-sorted shavings are quantitatively measured, the mass ratio of camellia oleifera shell surface shavings to wood surface shavings ...

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Abstract

The invention belongs to the technical field of composite materials, and provides a particle board and a preparation method and application thereof. The preparation method of the particle board comprises the steps that oil-tea camellia husk particles are dried and then sieved to obtain oil-tea camellia husk particles for surface layers and oil-tea camellia husk particles for core layers, the oil-tea camellia husk particles for the surface layers and the oil-tea camellia husk particles for the core layers are separately mixed with wood particles to obtain mixed particles for the surface layersand mixed particles for the core layers, an urea formaldehyde adhesive, an isocyanate adhesive and an beeswax emulsion hybrid adhesive are added, after the mixture is atomized by a pressurization nozzle, sizing treatment is carried out on the mixed particles for the surface layers and the mixed particles for the core layers, then pavement is carried out in a layered mode, layered pavement slabs ofthe lower surface layers / core layers / upper surface layers, then the pavement slabs are subjected to pre-pressing, high-frequency heating steam-injection heating, hot pressing, pressure maintaining and pressure relief forming, and the particle board is obtained. Compared with traditional wood raw materials, the particle board manufactured by using an oil-tea camellia husk has good physical and mechanical properties, the raw materials are easy to obtain, and the cost is zero, so that large-scale resource utilization of the oil-tea camellia husk is achieved.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a particleboard and its preparation method and application. Background technique [0002] Camellia oleifera is a unique woody edible oil tree species in my country, which is abundant in southern provinces such as Hunan, Jiangxi, Guangdong, Zhejiang, Guizhou and Yunnan. Camellia oil is rich in vitamin E, squalene, sterol and other active ingredients, and its unsaturated fatty acid content is as high as 90%. It is known as "Oriental olive oil" and "soft gold in oil". According to statistics, the existing Camellia oleifera cultivation area in the country is about 4 million hectares, with an annual output of about 5.6 million tons of Camellia oleifera fruit, and Camellia oleifera husk accounts for about 80% of the quality of Camellia oleifera fruit. Along with economic development and improvement of people's living standards, the camellia oleifera industry ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27L11/02B27N1/02B27N3/02
CPCB27L11/02B27N1/0209B27N3/02
Inventor 胡传双关丽涛云虹章伟伟古今涂登云鲁群霞宋杰
Owner SOUTH CHINA AGRI UNIV
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