Solid elastomer coating-free veneer overlay technique

Abstract

The invention discloses a process of dry glue-free veneer veneer, which includes the steps of selecting base material, selecting the adhesive material, preparing blanks, hot pressing and trimming. The step of selecting the base material includes selecting sanding Wood-based panels and thin veneers that have been properly spliced; wood-based panels require sanded density boards and particle boards suitable for veneering; among them, the adhesive material selected in the step of selecting adhesive materials is melamine film paper, the film The base paper of the film paper is impregnated and dried with melamine resin or melamine-modified urea-formaldehyde resin; the base paper of the film paper is made of α-cellulose pulp with high cellulose content; the blank preparation step is made into a slab; the slab It is formed by laminating film paper and veneer on at least one side of the wood-based panel in sequence; the hot pressing step sends the slab into the hot press for heating and pressing to complete the veneer veneer process; the trimming step is for the slab coming out of the hot press Proper trimming is the finished veneer veneer. It simplifies the process links, facilitates processing and has good environmental protection performance.

Description

technical field [0001] The invention relates to a wood-based panel veneer, in particular to a dry glue-free veneer veneer process. technical background [0002] Currently used veneer veneer technology, such as the national higher forestry college textbook "Particleboard Manufacturing" (2nd Edition) edited by Lu Renshu (for wood machining professionals) P.188-189 introduces the veneer veneer process. Specifically, "(5) veneer veneer process: [0003] 1. Selection of glued materials: Commonly used glues for thin wood veneer include urea-formaldehyde resin glue, polyvinyl acetate latex and the mixture of the two. When veneering by hand, there is also animal glue, which has poor water resistance. Animal glue can be used together with formalin (formaldehyde) to improve its water resistance. Urea-formaldehyde resin glue is an adhesive widely used in the production of veneer veneers at present. It has good gluing performance, high water resistance and low price. However, when v...

AI Technical Summary

Problems solved by technology

[0009] The disadvantages of the above traditional veneer veneer process: first, glue machine must be used to apply glue on wood-based panels, and there are many process links; second, the adhesive used is generally urea-formaldehyde resin glue and polyvinyl acetate latex

[0012] Because the above-mentioned existing technologies all adopt the method of gluing on wood-based panels, not only special equipment is required but also operators and process links are increased; and the high concentration of toxic formaldehyde odor emitted by liquid adhesives in the production workshop increases the working environment. pollution, and the high concentration of toxic formaldehyde will also bring extended damage to consumers in the later stage

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