Method of preparing laminated sheet

Abstract

The present invention is a method for manufacturing a composite board, which includes the following procedures: 1. a multi-layered board and a hot melt polymer resin flake are superimposed. 2. The hot melt polymer resin flake is melted by high-frequency heating and is locally pressed and positioned. 3. A high pressure hot pressing die hot presses and the board is formed. With the method the present invention can manufacture standard composite boards at large scale which have enough structural strength and no formaldehyde and is indeed a practical method for manufacturing composite boards.

Description

technical field [0001] The invention relates to a manufacturing method of wooden laminated boards, in particular to a manufacturing method capable of producing standard laminated boards in large quantities, with sufficient structural strength and without formaldehyde in the boards. Background technique [0002] Today's wooden plywood is used more and more in various fields. In addition to being used as a high-grade material for decoration, it also has a demand for the production of various wooden equipment. Therefore, wooden plywood is very important for The importance of today's industry cannot be overstated; the main steps of the traditional wooden laminate manufacturing method are as follows: [0003] 1. Use logs to cut to a fixed length, and roll the logs to make wooden veneers; [0004] 2. Coating formaldehyde resin on the surface of the wood veneer (formaldehyde resin is viscous at room temperature); [0005] 3. Stack several layers of wooden veneers according to req...

AI Technical Summary

Problems solved by technology

[0008] First, the conventional technology must coat formaldehyde resin on the surface of wood veneers, and use the adhesiveness of formaldehyde resin to combine them into laminated boards. However, after the finished formaldehyde resin is sold and used, formaldehyde gas will continue to be released under normal conditions. Not only will it cause great harm to the human body, but it will also fail to meet the increasingly stringent international environmental protection regulations

[0009] Second, there is no problem in using the formaldehyde resin to form a laminated board in a normal environment, but the formaldehyde resin material itself is not waterproof. If the laminated board is used in a humid or often wet environment (for example: Kitchen barrel body, bathroom decoration), the laminated board manufactured by this conventional method is easy to degumming, and the structure is loose and deformed

[0010] Third, the steps of coating formaldehyde resin on the surface of wood veneers are mostly manual brushing operations by processors, and the thickness of the coated formaldehyde resin is even more difficult to fix, and even cannot be filled and plugged in the pores of wood fibers, which seriously affects the quality of wood. Therefore, the products produced by this conventional method often have defects such as uneven coating and gluing failure.

[0011] Fourth, the conventional method utilizes the adhesiveness of formaldehyde resin to combine multi-layer wood veneers, but before it is placed in the thermoforming die, the conventional method must be initially pre-assembled into a multi-layer board, but the aforementioned multi-layer board is mixed with formaldehyde When the resin is glued and stacked, the glue viscosity of the formaldehyde resin will immediately glue the multi-layer wood veneers tightly, making it difficult for the processor to adjust the edge correspondingly before placing it in the thermoforming die. If the processor slightly pushes it sideways When one layer of wooden veneers is used, the lateral displacement will further enhance the bonding effect of the formaldehyde resin. If the calibration work cannot be positioned, the finished product will be scrapped. Therefore, the conventional production method still needs to be improved.

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