Abstract
The flexible modification of decorative veneer by plastic film is an effective method to broaden its applications. In order to understand the effect of initial veneer moisture content on the performance of plastic film reinforced decorative veneer, Fraxinus mandshurica veneers with different initial moisture contents were composited with polyethylene film. The overlaying performance of the decorative veneer and its interface morphology with MDF substrate were evaluated. The results showed that when the initial moisture content increased from 10% to 50%, the cavity proportion of PE film reinforced decorative veneer increased from 7.23% to 18.48%, while all of the minimum steel rod diameters remained at 7.6 mm. When the initial moisture content fluctuated between 10% and 20%, the optimum surface bonding strength (1 MPa) and immersion peel strength (0 mm) of the decorative veneer could be obtained. The strength of the decorative veneer significantly decreased when the initial moisture content was more than 20%, which was caused by the cavities and the poor interfacial bonding. The veneer surface was easy to crack under low moisture content conditions. Based on the overall performance and the cost of decorative wood-based panels, initial veneer moisture content was suggested to be 15% to 20%.
Highlights
Wood-based panels have been widely developed as alternative materials for furniture manufacturing, structure building board, and interior parts in cars because of their stable physical properties, wide sources of raw materials, and good use effect [1,2,3]
(2) Immersion Peel Strength (2) IAmlml deercsoiorantiPveeepl aSntreelsngwthere subjected to the type II immersion peel test (soaking at (63 ±A3l)l fdoerc3orha,taivnedpthaenneldsrwyienrgeastu(b6j3ec±te3d) ftoor t3hhe).tyTphee IpIeiemlinmgelresniognthpoefeelatcehsts(idsoeawkiansg at (m63ea±s3u)refdora3ndh,reacnodrdtehde,nadndrytihnegraetsu(6lt3s ±w3e)refoarcc3urha)t.eTthoe1pmeemli.nSgimleinlagrthtoothf eearcehsusltids eofwas msuerafsaucreebdonanddingresctorerdngedth,atnhde itmhemreersuiolntspweeelrsetraecncgutrhatoef tMo D1Fmpman. eSlimovielarlraytoedthweirthestuhlets of Fraxinus mandshurica sliced veneer with initial moisture content (MC) of 10%, 20%, 30%, 40%, and 50% respectively were successfully compounded with PE film
Due to the PE film, the flexibility of Fraxinus mandshurica veneer was significantly improved, but the flexibility was not affected by the initial veneer MC
Summary
Wood-based panels have been widely developed as alternative materials for furniture manufacturing, structure building board, and interior parts in cars because of their stable physical properties, wide sources of raw materials, and good use effect [1,2,3]. Sliced veneer is only available for plane or curved surfaces with a large radius of curvature for decoration. These problems can be effectively solved by compounding the decorative veneer with flexible materials, such as non-woven fabric, paper, and plastic film [8,9,10]. Compared with non-woven fabrics, paper, and other reinforced materials, its preparation and finishing process is simple and the energy consumption is low. It has been proven that the atmospheric dielectric barrier discharge plasma is a good method to improve the veneer surface wettability and surface roughness, which can effectively solve the problem of curling deformation and poor interfacial adhesion [18,19,20]
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