Nano-class composite covering agent of calcium carbonate for plywood with decorative surface

Abstract

A composite converting agent for the plywood used as decorative surface is prepared from CaCO3 with 20-100 nm of granularity, TiO2 (anatase type), acicular iron yellow powder, vinyl polyacetate, sodium carbonate and water. Its advantages are low cost and high covering performance to prevent the release of formaldehyde.

Description

technical field [0001] The invention relates to a covering agent, in particular to a nano-calcium carbonate composite covering agent for thin wood decorative veneer plywood. Used in the decoration material industry. Background technique [0002] The veneer plywood is made of natural wood decorative veneer glue on the surface of the plywood. Due to the original growth defects of natural wood, the product appears "out of the bottom", which affects the appearance of the product, reduces the utilization rate of wood processing, and wastes a lot of wood resources. In response to this problem, the traditional method is to coat the composite covering agent with titanium dioxide as the main body on the plywood panel to conceal the defects on the wood surface. However, in order to achieve the ideal concealment effect, a large amount of titanium dioxide must be used, resulting in: 1) increased production costs; 2) serious pollution, because formaldehyde released from decorative vene...

AI Technical Summary

Problems solved by technology

The United States, Japan and other countries have long made strict regulations on the formaldehyde emission of wood-based panels. At present, the products in the domestic market are far from meeting the requirements of green environmental protection. The country is encouraging the development and production of green environmental protection products.