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Industrial resin-impregnation and overlaying application of reconstituted decorative veneers(PDF)

Journal of Forestry Engineering[ISSN:2096-1359/CN:32-1862/S]

Issue:
2020 No.06
Page:
43-48
Research Field:
木材科学与技术 执行主编：吴义强 梅长彤
Publishing date:
2020-11-01

Info

Title:
Industrial resin-impregnation and overlaying application of reconstituted decorative veneers
Author(s):
WANG Rui1;  XU Deliang1;  YANG Yong2;  YAN Wenwen2;  ZHAN Xianxu2; XU Xinwu1*
1. College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China; 2. Zhejiang Dehua Tubaobao Institute of Decorative New Materials, Deqing 313200，Zhejiang,China
Keywords:
reconstituted decorative veneer;  resin impregnation;  thin veneer;  decorative materials;  decorative
PACS:
S785
DOI:
10.13360/j.issn.2096-1359.201911020
Abstract:
Thin veneer, including natural thin veneer and reconstituted decorative veneer, is commonly used to decorate the surface of woodbased panels and products. The traditional thin veneeroverlaying process requires the addition of adhesive to overlaying and the painting decoration, which is cumbersome and the release of organic volatiles can cause longterm indoor air pollution. Therefore, in recent years, the resinimpregnated thin veneer has been utilized as a new highgrade decorative material. As a new decorative material, the continuity and largedimension are crucial issues for the industrial production and application of the resinimpregnated thin veneer. In this research, an industrial production line of the resinimpregnated paper with melamine formaldehyde resin (MF) was used to impregnate the synthetic resin on the reconstituted decorative veneer. The continuous impregnation process of the reconstituted decorative veneer was introduced, and the micromorphology of the surface of the decorative veneer before and after impregnation were compared. The hotpressing process parameters including the hotpressing temperature, hotpressing time, and hotpressing pressure were studied to make the resinimpregnated reconstituted decorative veneer. Through the observation of the microstructure appearance, it was found that the resinimpregnated reconstituted veneer reflected the obvious impregnation quality which was similar to the impregnated paper. The surface bond strength of the resinimpregnated thin veneer overlaid plywood, particleboard, and fiberboard substrates were examined. The results showed that the resinimpregnated thin veneers could be widely applicable to such wood composite panels and the surface bond strengths of them were higher than 1 MPa, in which, the overlaid fiberboard owned the highest surface bond strength and followed by the overlaid plywood. It was also necessary to investigate the storage durability of resinimpregnated thin veneers by testing surface bond strength and the results indicated that resinimpregnated thin veneers had prominent storage durability. Compared with the resinimpregnated thin veneer stored at room temperature, the resinimpregnated thin veneer stored at low temperature was more durable. The optimized hotpressing technical parameters were the temperature of 180-190 ℃, for 80-100 s, at a pressure level of 2 MPa. The above results confirmed that it was technical feasible to continuously produce large dimension resinimpregnated veneers. This research can provide valuable information to promote the development of the large scale production and application of resinimpregnated thin veneers.

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Last Update: 2020-11-11