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Process for the manufacture of formaldehyde-free glued interior plywood or flooring substrates

A manufacturing method and technology for plywood, which are applied in the fields of wood science and engineering technology and decorative building materials, can solve problems such as warping deformation, poor waterproofness, formaldehyde release, etc., and achieve the effects of improving production efficiency, increasing bonding strength, and improving production environment.

Inactive Publication Date: 2016-04-13
JIANGSU MINGLE FLOOR +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention proposes a method for manufacturing formaldehyde-free glued indoor plywood or floor substrates, and its purpose is to overcome the problems of poor water resistance, warping and deformation, formaldehyde release, etc. , through the combination of veneer surface hydrophobization treatment and hot-melt adhesive film bonding technology, an environmentally friendly plywood or floor base that does not release formaldehyde and any other harmful substances, has excellent dimensional stability and waterproof performance, is provided for interior decoration. material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Take a 2.0mm thick poplar veneer and put it in a drying oven, and dry it at 50°C for 20 minutes. After taking it out, spray octyltriethoxysilane waterproofing agent on the glued surface of the veneer, and spray an appropriate amount of 20g / m 2 , placed in the air for 24 hours, put a PES hot-melt adhesive film with a thickness of 0.2mm between each two layers of the dried veneer to form a 7-layer slab, and then put it into a hot press machine with a hot pressing temperature of 140 ° C, unit The pressure is 0.5MPa, the hot pressing time is 5min, and then the plate is unloaded after cooling down to 90°C.

[0021] The plywood pressed by the above method was sawn into a 75mm×75mm test piece, soaked in water at 63°C for 3 hours, and dried at 63°C for 3 hours after taking it out. There was no glue separation in each glue layer.

Embodiment 2

[0023] Take a 2.0mm thick poplar veneer and put it in a drying oven, dry it at 50°C for 20 minutes, after taking it out, paint the veneer with a water glass waterproofing agent with a modulus of 3.0 and a Poume degree of 40, and the amount of coating is 50g / m 2 , take it out and put it in a drying oven for 1 hour at 50°C, put a PO hot-melt adhesive film with a thickness of 0.25 between each layer of the dried veneer to form a 7-layer slab, and then put it into a hot press machine to adjust the hot-press The temperature is 150°C, the pressure is 0.5MPa, and the hot pressing time is 6 minutes; then the temperature is lowered to below 90°C and the plate is removed.

[0024] The plywood pressed by the above method was sawn into a 75mm×75mm test piece, soaked in water at 63°C for 3 hours, and dried at 63°C for 3 hours after taking it out. There was no glue separation in each glue layer, and the peeling wood slope rate of the veneer reached more than 80%.

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Abstract

The invention relates to a manufacturing method of high-stability formaldehyde-free gluing indoor plywood or a floor base material. The manufacturing method comprises the following steps that (1) single plates are dried; (2) surface modifiers are smeared or sprayed on the surfaces of the single plates and then dried until films are formed on the surfaces of the single plates; (3) the single plates are arranged in order and assembled according to requirements, and a hot melting glue film with the same size as the single plates is laid between every two single plates; (4) a plate blank is fed into a hot press to be formed in a hot press gluing mode, and the blank is cooled after hot press, then discharged and unloaded; (5) the blank is stored at normal temperature and manufactured into a finished product after being machined through size cutting and later forming. The manufacturing method of the high-stability formaldehyde-free gluing indoor plywood or the floor base material has the advantages that the hot melting glue films are used for replacing traditional formaldehyde-class glue, no formaldehyde or other harmful matter is discharged from the product, a gluing procedure is eliminated, the production environment is improved, and production efficiency is improved. The surfaces of the single plates are modified through environmentally-friendly organic silicone waterproof agents, the hardness of the surfaces of the single plates is increased, hydrophobic films are formed, the gluing strength of the hot melting glue films and the base material is largely improved, and the waterproof performance and size stability of the product is improved.

Description

technical field [0001] The invention relates to a method for manufacturing a formaldehyde-free glued indoor plywood or floor base material without any release of harmful substances, excellent in water resistance and dimensional stability, and belongs to the technical fields of wood science and engineering technology and decorative building materials. Background technique [0002] As natural hardwood resources are decreasing day by day, plantation fast-growing wood is more and more used in the production of various plywood due to its advantages of rapid growth and large reserves. However, due to the short growth period of fast-growing wood, there are natural defects such as soft material, low strength, low hardness, and poor dimensional stability. In addition, in the production process of plywood and other products, urea-formaldehyde resin or melamine-modified urea-formaldehyde resin is generally used as an adhesive, which is inevitable. There is a problem of formaldehyde rel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27M3/04B27D1/08B32B37/06B32B37/10B32B37/04
Inventor 孙丰文陈伟刘龙龙严娜
Owner JIANGSU MINGLE FLOOR
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