Plasma modification method to improve the bonding performance of decorative veneer and veneer interface

Abstract

The invention discloses a method for improving the interface bonding performance between composite flexible decorative veneer and surface facing through plasma modification. The method sequentially comprises the following technology steps that surface pretreatment of the decorative veneer, low-temperature plasma treatment of the surface of the decorative veneer, low-temperature plasma treatment of the surface of a plastic film, assembly and hot pressing of the decorative veneer and the plastic film, and facing hot-pressing of the plastic-film-reinforced flexible decorative veneer. By the adoption of the method for improving the interface bonding performance between the composite flexible decorative veneer and the surface facing through plasma modification, woodwork surface facing is conducted through the plastic-film-reinforced flexible decorative veneer manufactured through plasma modification treatment, an adhesive is not needed, the procedure of applying the adhesive can be omitted, the bonding strength of the facing surface of the product can be improved by 10%-70%, the adhesive force of a paint film can be improved by 20%-40%, the production cost can be reduced by 10%-50%, energy is saved, environmental friendliness is achieved, operation is easy and convenient, and efficiency is high.

Description

technical field [0001] The invention relates to a method for plasma modification to improve the interface bonding performance of composite flexible decorative veneers and surface finishes, which belongs to the wood processing industry and is a new method used in the fields of decoration, wood products, furniture lines, and door and window plate decoration. craft. Background technique [0002] With the rapid development of my country's furniture industry and interior decoration industry, it has driven a large demand for wood decoration materials. However, my country's timber resources are insufficient, especially the resources of precious tree species are extremely short. In order to increase the added value of wood products and the utilization rate of precious species of wood, the precious species of wood is usually peeled or sliced ​​to make decorative veneer (thickness 0.15-0.80mm), which is used for veneer processing of wood products. [0003] Generally, untreated natur...

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Problems solved by technology

[0005] However, plastic film and wood are two polymer materials with very different polarities. Most thermoplastic resins do not contain functional groups that can react with active groups in wood (such as hydroxyl groups), and it is difficult to form a good bond between the glued interfaces. , poor interface bonding performance

And the plastic film is a thermoplastic adhesive, its melting temperature reaches 130°C, and its thermal expansion and contraction coefficients are quite different from those of wood. After hot pressing and lamination, it is easy to cause problems such as discoloration and curling deformation of decorative veneer, which is not conducive to industrial production.

At the same time, plastic film-reinforced flexible decorative veneer products also have problems such as poor bonding performance between plastic film and wood product surfaces during the surface finishing process of wood products that are subjected to secondary hot-pressing, and the quality of surface finishes is difficult to guarantee.

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