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A kind of plywood unilateral surface reinforced profile and its preparation method and application

A plywood, side surface technology, applied in the direction of plywood press, wood heating, veneer press, etc., can solve the problems of poor stability, complex preparation process, large volume loss of modified plywood, etc., to achieve density and hardness improvement, method Simple, overcoming the effect of long processing time

Active Publication Date: 2022-07-01
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method adopts water vapor spray method, asymmetric heating and hot pressing method, surface mechanical compression strengthening method and in-situ pressure holding drying and fixing method to plasticize, soften, compress and strengthen and dry and shape the surface layer of plywood on one side, which overcomes the existing problems. There are technical problems in the existing technology that the preparation process is complicated, only the surface layer on both sides of the plywood can be compacted, the volume loss of the obtained modified plywood is large, and the stability is poor.

Method used

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  • A kind of plywood unilateral surface reinforced profile and its preparation method and application
  • A kind of plywood unilateral surface reinforced profile and its preparation method and application
  • A kind of plywood unilateral surface reinforced profile and its preparation method and application

Examples

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Effect test

Embodiment 1

[0037] In this example, radiata pine plywood is subjected to one-side surface enhancement treatment, and the finished plywood used is composed of radiata pine veneer, and the average moisture content of each layer of veneer is 10%; the thickness of the surface layer veneer on the side that needs to be compressed and strengthened is 3mm, and the average density is 350kg / m 3 , the hardness is 1250N; the average density of the uncompressed layer is 350kg / m 3 , the hardness is 1300N. figure 1 It is a schematic diagram of the preparation method of the single-side surface reinforced profile of the plywood of the present invention, from figure 1 It can be seen that the uncompressed layer is composed of multiple layers of veneers in plywood, and each layer of veneer is connected by an adhesive layer. The specific steps are as follows:

[0038] (1) Plasticizing stage of one-side surface layer: the water vapor spray method is used to spray water on the surface layer of the plywood on ...

Embodiment 2

[0045] In this example, the poplar plywood is reinforced on one side of the surface, and the finished plywood used is composed of poplar veneer, and the average moisture content of each layer of veneer is 10%; the thickness of the surface layer veneer on the side that needs to be compressed and strengthened 4mm, the average density is 400kg / m 3 , the hardness is 1750N, and the average density of the uncompressed layer is 400kg / m 3 , the hardness is 1800N.

[0046] (1) Plasticizing stage of one-side surface layer: the water vapor spray method is used to spray water on the surface layer of the plywood on the side that needs to be compressed and reinforced. At 55°C, the plywood was sealed and wrapped with polyethylene film for 36 hours, and the moisture content of the surface layer on one side of the plywood was adjusted to 15% to obtain a plywood with a plasticized one-side surface layer;

[0047] (2) Softening stage of one-side surface layer: The plasticized surface layer of ...

Embodiment 3

[0053] In this example, one-side surface enhancement treatment is performed on the Milao row-radiata pine plywood. The finished plywood used is composed of the Milao row and the radiata pine veneer. The average moisture content of each layer is 10%. ; The thickness of the surface layer veneer on the side to be compressed and strengthened is 3mm, and the average density is 480kg / m 3 , the hardness is 2100N; the average density of the uncompressed layer is 480kg / m 3 , the hardness is 1300N.

[0054] (1) Plasticizing stage of one-side surface layer: the water vapor spray method is used to spray water on the surface layer of the plywood on the side that needs to be compressed and reinforced. At 70°C, the plywood was sealed and wrapped with polyethylene film for 48 hours, and the moisture content of the single-side surface layer of the plywood was adjusted to 17% to obtain a single-side surface layer plasticized plywood;

[0055] (2) Softening stage of one-side surface layer: The p...

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Abstract

The invention belongs to the technical field of wood decoration material enhancement and modification and wood product production technology, and discloses a single-side surface reinforced profile of plywood and a preparation method and application thereof. The method adopts the water vapor spraying method, the asymmetric heating and hot pressing method, the surface mechanical compression strengthening method and the in-situ pressure-holding drying and fixing method to plasticize, soften, compress and strengthen and dry and shape the single-sided surface layer of the plywood. Plywood single-sided surface reinforcement profile. The method of the invention has the advantages of simple process, low production energy consumption, high production efficiency, large-scale continuous production can be realized, and good economic benefits are reflected. The single-side surface reinforcement layer of the prepared plywood single-side surface reinforcement profile has high density, hardness and good dimensional stability, and the profile can be widely used in solid wood composite floors, wooden furniture, wooden doors, cabinets and other wood products. manufacture.

Description

technical field [0001] The invention belongs to the technical field of wood decoration material enhancement and modification and wood product production technology, and more particularly relates to a single-sided surface reinforced profile of plywood and a preparation method and application thereof. Background technique [0002] With the reduction of natural forest wood harvesting, the rational development and utilization of plantation fast-growing wood has been paid more and more attention. Plantation fast-growing woods mainly include rice row, poplar, fir, radiata pine, masson pine and other tree species, which are characterized by fast growth, early maturity and short rotation period. However, it is precisely because of the fast growth rate of plantation forests that it generally suffers from low density, easy deformation and decay, and low surface hardness. At present, plantation fast-growing wood is mainly used in the field of wood-based panel manufacturing. The main f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27D1/08B27D3/00B27K1/00B27K5/00
CPCB27D1/083B27D3/00B27K1/00B27K5/001
Inventor 涂登云郑泽灏周桥芳王先菊陈川富关丽涛梁尔珊
Owner SOUTH CHINA AGRI UNIV
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