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Zero-formaldehyde release water-borne polyurethane adhesive LVL (Laminated Veneer Lumber) and manufacturing method thereof

A water-based polyurethane glue and water-based polyurethane technology, applied in the field of wood processing, can solve the problems of insufficient flexibility and easy breakage of plywood, and achieve the effect of soft and flexible glue layer

Inactive Publication Date: 2017-11-03
兰州科天水性科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] On the other hand, the molding materials for handicrafts and special-shaped furniture and plywood for ordinary structures are increasing continuously. The plywood produced by the existing adhesive is not flexible enough, and it is easy to break when modeling, so it is difficult to find suitable materials to replace it.

Method used

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  • Zero-formaldehyde release water-borne polyurethane adhesive LVL (Laminated Veneer Lumber) and manufacturing method thereof
  • Zero-formaldehyde release water-borne polyurethane adhesive LVL (Laminated Veneer Lumber) and manufacturing method thereof

Examples

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Embodiment

[0040] 1. Material sorting: select poplar veneer with a thickness of 1.2mm as the core board of plywood, control the moisture content within 14%, separate the loose side and tight side of the veneer, and make a good mark. Select Okoume's veneer as a backup board.

[0041] 2. End cutting teeth: Cut the sorted core plate into an equilateral triangle with the side length not less than 40mm. The edge is cut into half teeth, the details are as attached figure 1 as shown, figure 1 The distance a in the middle is the side length 40mm of the equilateral triangle incisor, b is half of the side length, and the half side length is 20mm.

[0042] 3. Glue adjustment: Weigh 40kg of aromatic water-based polyurethane-acrylic resin (produced by Water-based Ketian, model: WR11), 20kg of white ore powder (Guangzhou Fujian Material Jiaoling Refining Co., Ltd., model: CC-1000), Put 38kg of water into the bucket of the disperser, add 2.0kg of isocyanate (BASF, model: M20S) at a speed of 500r / min...

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Abstract

The invention discloses a zero-formaldehyde release water-borne polyurethane adhesive LVL (Laminated Veneer Lumber) and a manufacturing method thereof. According to the manufacturing method disclosed by the invention, the zero-formaldehyde release water-borne polyurethane adhesive LVL can be manufactured through coating the lumber with a specific formaldehyde-free water-borne polyurethane adhesive and through a specific cold and hot pressing process and a specific veneer processing mode.

Description

technical field [0001] The invention relates to the field of wood processing, in particular to a zero-formaldehyde-releasing water-based polyurethane glue LVL layered plate and a manufacturing method thereof. Background technique [0002] At present, the wood-based panels sold in the market and produced by factories contain formaldehyde, and the harm of formaldehyde is well known, and the plywood that can be used for food packaging is even more vacant in China. The national standard "GB18580-2001 Limits of formaldehyde release in wood-based panels and their products for interior decoration materials" stipulates that the minimum release amount is also 1.5mg / L, and formaldehyde will still be released, which is harmful to the human body, especially to children. great harm. [0003] On the other hand, the molding materials for handicrafts and special-shaped furniture and plywood for ordinary structures are increasing continuously. The plywood produced by existing adhesives is n...

Claims

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Application Information

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IPC IPC(8): B27D1/08B27D5/00
CPCB27D1/08B27D5/006
Inventor 戴家兵梁长里曾灵郑记国
Owner 兰州科天水性科技有限公司
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