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Method for manufacture of wet glued wood article

一种胶合木材、木材制品的技术，应用在制造湿胶合木材制品领域，能够解决无法控制工件初始水分含量等问题

Active Publication Date: 2018-12-21
STORA ENSO OYJ
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] During conventional sawing, the initial moisture content of the workpiece cannot be controlled

Method used

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  • Method for manufacture of wet glued wood article
  • Method for manufacture of wet glued wood article
  • Method for manufacture of wet glued wood article

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] Throughout the description the expression "actively undried or slightly dried wood workpiece" is intended to cover any wood workpiece that can be used in the context of the method according to the first aspect of the invention. Preferably, the wood workpiece is a freshly sawn wood workpiece. "Reject material" from kiln drying processes aimed at providing material for glued laminated products such as Cross Laminated Timber (CLT), but which do not meet the required moisture content standards, can also be used.

[0023] The expression "binder" throughout the present description is intended to cover any binder that can be used in the context of the method according to the invention. Preferably, the glue is selected from polyurethane glue (PUR), phenol- and resorcinol-formaldehyde (PF and RF) glue or melamine-urea-formaldehyde (MUF) glue or combinations thereof. Preferably, a PUR glue (such as a PUR glue system) is used in the method according to the invention.

[0024] Ac...

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PUM

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Abstract

The invention relates to a method for manufacturing a wet glued wood article, as well as a wet glued article obtainable by said method and also uses of a wet glued article, wherein the method comprises the following steps: a) providing two actively never-dried or slightly dried wood pieces comprising at least one surface each which has a superficial layer having a thickness of least 2-3 wood cells; b) drying said surfaces of said wood pieces so that the moisture content of said superficial layer is below the fibre saturation point, providing a dried surface on each of the said wood pieces; c)applying a gluing agent on said dried surface of one of the wood pieces, thus providing a glue surface; d) bringing the dried surfaces together so that said glue surface touches the dried surface on the other wood piece, thus providing a wet glued wood article.

Description

technical field [0001] The present invention relates to a method for producing a wet-glued wood product, a wet-glued wood product obtainable by said method and the use of the wet-glued wood product. Background technique [0002] The freshly cut sawn products are geometrically close to perfect – in most cases the profile is a rectangular plate (the same applies to other geometries). The edges or faces are accurate enough that they can be glued together directly. [0003] Through the kiln drying process, face flatness (uniformity) is lost because some areas of the board shrink at different rates relative to other areas. The result of these deformations is known as cupping, bowing, twisting, and the like. (See Figure 4 ). [0004] In order for kiln dried workpieces to be dry glued, substantial material must be removed by planing, profiling, etc. to recreate perfectly level faces and edges. [0005] The transfer of wet gluing to an industrial process is also hampered by the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J5/02B27D1/00B32B21/04C09J161/06C09J161/20C09J175/04F26B3/00F26B5/00
CPCB27D1/00B27M3/0053B32B21/04C09J5/02C09J161/06C09J161/12C09J161/30C09J175/04F26B3/00F26B5/00C09J2475/00C09J2461/00C09J2400/303C09J2400/306B32B7/12B32B21/02B32B21/13B32B3/26B32B2250/02B32B2307/7246B32B2419/00B32B2479/00B32B21/042C09J161/20
Inventor M.希尔姆克
Owner STORA ENSO OYJ