Unlock instant, AI-driven research and patent intelligence for your innovation.

Method of using additive containing lignin to prepare cottonwood plank stuff

A technology for the preparation of additives and poplar wood, which is applied in the direction of wood compression, wood impregnation, wood impregnation, etc., can solve the problems of containing and harmful, and achieve the effects of simple production process, improved dimensional stability, and good dimensional stability.

Inactive Publication Date: 2009-12-09
广西林安木业有限公司
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many deficiencies in these methods, the most important of which is that the resin contains harmful free formaldehyde

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] The method for preparing poplar boards by utilizing lignin-containing additives, the preparation steps are:

[0009] a. Raw material preparation: select poplar slabs, and prepare mixed solutions of two formulas, formula one: a mixed solution of lignin solution and formaldehyde solution, and formula two: a mixed solution of lignin solution and furfural solution;

[0010] B. slab impregnation treatment: the prepared poplar slabs are respectively immersed in a sealed tank filled with two kinds of mixed impregnating solutions for vacuum treatment;

[0011] c. Slab pressing: put the poplar slab after the impregnation treatment in the previous step into a hot press and heat press to obtain a poplar board.

[0012] The air-dried moisture content of poplar slab is 9%. Step a prepares the mixed solution of two kinds of formulations. Among them, formula one is: a mixed solution of lignin solution and formaldehyde solution, wherein the mixed solution is composed of: the mass per...

Embodiment 2

[0014] The method for preparing poplar boards by utilizing lignin-containing additives, the preparation steps are:

[0015] c. Raw material preparation: select poplar slabs and prepare mixed solutions of two formulas, formula one: a mixed solution of lignin solution and formaldehyde solution, and formula two: a mixed solution of lignin solution and furfural solution;

[0016] D. slab impregnation treatment: the prepared poplar slabs are respectively immersed in a sealed tank filled with two kinds of mixed impregnating solutions for vacuum treatment;

[0017] c. Slab pressing: put the poplar slab after the impregnation treatment in the previous step into a hot press and heat press to obtain a poplar board.

[0018] The air-dried moisture content of the poplar slab is 10%. Step a prepares the mixed solution of two kinds of formulations. Among them, formula one is: a mixed solution of lignin solution and formaldehyde solution, wherein the composition of the mixed solution is: t...

Embodiment 3

[0020] The method for preparing poplar boards by utilizing lignin-containing additives, the preparation steps are:

[0021] e. Raw material preparation: select poplar slabs, and prepare mixed solutions of two formulas, formula one: a mixed solution of lignin solution and formaldehyde solution, and formula two: a mixed solution of lignin solution and furfural solution;

[0022] F. slab impregnation treatment: the prepared poplar slabs are respectively immersed in a sealed tank filled with two kinds of mixed impregnating solutions for vacuum treatment;

[0023] c. Slab pressing: put the poplar slab after the impregnation treatment in the previous step into a hot press and heat press to obtain a poplar board.

[0024] The air-dried moisture content of the poplar slab is 12%. Step a prepares the mixed solution of two kinds of formulations. Among them, formula one is: a mixed solution of lignin solution and formaldehyde solution, wherein the composition of the mixed solution is: ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A method for preparing poplar boards by using lignin-containing additives. Raw material preparation: preparing a mixed solution of lignin solution and formaldehyde solution; slab impregnation treatment: immersing the prepared poplar slabs in a tank filled with lignin-formaldehyde mixed impregnation solution Vacuum treatment in a sealed tank; slab pressing: put the poplar slab after the impregnation treatment in the previous step into a hot press with a steam generating device for hot pressing; post-treatment of the slab: stack 14 slabs after the above steps Today, the compressed poplar wood is produced. The dimensional stability of the compressed material is greatly improved, and the production process is simple, and the performance index of the product can reach the performance index of similar domestic products. The plate produced by the method has good dimensional stability under the premise of ensuring good physical and mechanical properties, and the problem of free formaldehyde will not be generated.

Description

1. Technical field [0001] The invention belongs to the field of wood-based panel manufacturing, in particular to a method for preparing poplar boards. 2. Background technology [0002] Prior Art: Poplar is one of the main fast-growing plantation tree species in my country, and its material has defects such as soft wood, low density, low hardness, low strength, and perishability, which limits its scope of use. The transverse grain compression of wood can improve the physical and mechanical properties of wood with light and soft material, low density and poor processing performance. However, the main disadvantage of compressed wood is that it is not dimensionally stable. If it is immersed in water or left in the air to absorb moisture, it will gradually return to its original size. The method for fixing the deformation of compressed wood that is often used at home and abroad is to inject chemical agents such as phenolic resin and urea-formaldehyde resin into the wood interior...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B27M1/08B27K3/08B27K3/50B27M1/02
Inventor 卢晓宁王志强王超先夏积文易庠华那斌许俊
Owner 广西林安木业有限公司