Additive of urea formaldehyde resin adhesive and preparation method thereof

Abstract

The invention provides an additive of a urea formaldehyde resin adhesive and a preparation method thereof. The additive of the urea formaldehyde resin adhesive is prepared from the following components in parts by weight: 100 parts of modified wood flour, 50-100 parts of acorn starch and 50-500 parts of desulfurized gypsum. The additive is prepared by uniformly mixing the modified wood flour, acorn starch and desulfurized gypsum. The additive of the urea formaldehyde resin adhesive can be used for replacing flour to be added into urea formaldehyde resin, so that when an artificial board is manufactured, the adhesive has a good pre-pressing property, thereby ensuring high production efficiency of the artificial board, effectively reducing the release amount of the formaldehyde in the artificial board, and improving the physical and mechanical properties of the artificial board.

Description

technical field [0001] The invention relates to an additive for an adhesive, in particular to an additive for a urea-formaldehyde resin adhesive for a wood-based panel and a preparation method thereof. Background technique [0002] Various types of wood-based panels are often used in large quantities in decoration and furniture manufacturing, such as plywood, blockboard, medium-density fiberboard, and particle board. In 2009, the output of my country's wood-based panels has exceeded 100 million m 3 , more than half of which are plywood and blockboard. my country's total wood-based panel output, plywood output, and blockboard output have ranked first in the world for many years. Only plywood and blockboard consume about 6 million tons of adhesives (50% solid content) per year. In the production process of plywood and blockboard, 20-30% of the total weight of flour is often added to the adhesive as a filler to improve the pre-pressing performance of the adhesive, improve pro...

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Problems solved by technology

2) Use synthetic or modified natural polymers instead of wheat flour, because the price of these substances is too high (the price of polyvinyl alcohol and hydroxymethyl cellulose is more than 12,000 yuan / ton, which is much higher than the 2,000-3,000 yuan of wheat flour yuan / ton), resulting in a substantial increase in the production cost of wood-based panels, which is difficult for enterprises and users to accept

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