Analysis of factors affecting the surface crack resistance of ecological boards

Authors: Ye Jiaoyou, Shen Juanxia, ​​and Guo Bingtuo

Unit: Dehua Bunny Baby Decoration New Materials Co., Ltd.

Source: China Wood-Based Panels, Issue 6, 2018

Introduction

Through experimental research, the effects of the bursting resistance of impregnated film paper, the uniformity of the balance layer interface material, the moisture content of the substrate, and the stability of the substrate structure on the surface crack resistance of the ecological board were analyzed.

Eco-board, a common name for impregnated paper-faced plywood and blockboard, is an emerging board material used in interior decoration and furniture. After nearly 10 years of development, the quality of eco-board has steadily improved, and the product range has also developed well. However, before the implementation of national standards for eco-board products, some performance indicators lacked a basis for market supervision, particularly the surface cracking resistance of eco-board. Eco-board generally consists of three parts: a base material layer, a balancing layer, and a surface decorative paper layer. Surface cracking resistance refers to the ability of the product surface to remain free of microscopic cracks under the influence of moisture and heat. It is used to measure the eco-board's ability to adapt to rapid changes in temperature and humidity.

This article analyzes the main factors affecting the crack resistance of the surface of ecological boards, including the tear resistance of the surface decorative paper, the uniformity of the interface material of the balance layer, the stability of the substrate structure, and the moisture content of the substrate. The main conclusions are as follows:

1) Under the premise that the substrate and the balance layer are the same, the burst resistance of the impregnated film paper affects the surface crack resistance of the ecological board to a certain extent. The higher the burst resistance, the higher the crack resistance grade.

2) The material uniformity of the balance layer between the substrate and the impregnated film paper has a great influence on the surface crack resistance of the ecological board. The more uniform the material of the balance layer is, the higher its crack resistance level is, and the more obvious the anisotropy is, the lower its crack resistance level is.

3) The structure of the substrate affects the surface crack resistance of the ecological board to a certain extent. The more stable the structure of the substrate, the higher the surface crack resistance of the finished product.

4) The moisture content of the substrate affects the surface crack resistance of the eco-board to a certain extent. The higher the moisture content of the substrate, the worse the surface crack resistance of the eco-board.

Based on the test data, in order to continuously improve the surface crack resistance of ecological boards and eliminate the regional limitations of the product, we can comprehensively evaluate the controllability and cost of influencing factors, effectively control the burst resistance of the surface impregnated film paper, the material uniformity of the balance layer, the structural stability of the base material and the moisture content of the base plate, formulate feasible production processes and standards, and produce high-quality ecological boards.