Ultralow-aldehyde impregnating adhesive for impregnated paper and preparation method of ultralow-aldehyde impregnating adhesive

Abstract

The invention discloses an ultralow-aldehyde impregnating adhesive for impregnated paper and a preparation method of the impregnating adhesive. The impregnating adhesive is characterized by being prepared by mixing the following components in parts by weight: 60 to 80 parts of melamine-modified ultralow-aldehyde-level urea resin, 10 to 20 parts of a modifier (1), 10 to 20 parts of a modifier (2) and 1 to 4 parts of a penetrating agent, wherein the modifier (1) is cationic polyurethane resin, and the modifier (2) is acrylate composite emulsion. The Tu-4 cup viscosity of the impregnating adhesive for the ultralow-aldehyde impregnated paper is 12.0 to 15.0 seconds, and the PH value is 6.0 to 8.5. The ultralow-aldehyde impregnating adhesive for the impregnated paper is low in formaldehyde release amount; furthermore, the impregnated paper manufactured by the impregnating adhesive is high in water resistance and high in surface performance when used for producing impregnated paper veneer aldehyde-free artificial board.

Description

technical field [0001] The invention relates to the field of wood processing adhesives, in particular to an impregnating glue for ultra-low aldehyde impregnating paper and a preparation method thereof. Background technique [0002] In recent years, with the development and maturity of the wood industry, various formaldehyde-free wood-based panel products, such as formaldehyde-free plywood, formaldehyde-free blockboard, and formaldehyde-free veneer, have come out and come into the market. When these formaldehyde-free wood-based panels are used as base boards to process formaldehyde-free wood-based panels with impregnated film paper, it is necessary to use formaldehyde-free or ultra-low formaldehyde-grade impregnated film paper. However, due to the relatively backward development of the formaldehyde-free glue technology used in impregnated film paper, it is still in the research and development stage, so there is no industrialized technology and product. The veneer processing...

AI Technical Summary

Problems solved by technology

When using this kind of ordinary E0 grade impregnated paper to produce impregnated film paper veneer formaldehyde-free wood-based panels, it is necessary to add a process of adding aldehyde remover, which not only increases the production cost, but also prolongs the production cycle and reduces production efficiency. Will have a certain negative impact on other properties of product quality

However, impregnated paper with lower aldehyde (such as: ultra-low aldehyde melamine paper, pre-painted paper, etc.), because the properties of the impregnated glue used cannot be taken into account with each other, the impregnated paper produced has obvious defects and has not been popularized.

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