Abstract
This work aimed to evaluate the utilization potential of wood from Pinus elliottii var. elliottii x Pinus caribaea var. hondurensis hybrid, seven years and 10 months of age, for veneer production. Wood density, peeling yield and the quality of the veneers produced from logs taken from two positions on the tree trunk were assessed: from the base (A logs) and subsequent (B logs). The wood presented low basic density (0.320 g/cm3) and proved to be easily processed in the rotary cutting lathe. The peeling yield (average based on logs without bark) was approximately 53%. The veneers graded in the C and C+ classes accounted for approximately 61% of the total obtained. The A logs yielded more veneers, but the veneers produced presented lower quality compared with those produced from the B logs. We concluded that the hybrid wood herein studied shows good potential for veneer production.
Highlights
This work aimed to evaluate the utilization potential of wood from Pinus elliottii var. elliottii x Pinus caribaea var. hondurensis hybrid, seven years and 10 months of age, for veneer production
Wood density, peeling yield and the quality of the veneers produced from logs taken from two positions on the tree trunk were assessed: from the base (A logs) and subsequent (B logs)
The peeling yield was approximately 53%
Summary
Existe uma grande variedade de espécies de madeiras com características adequadas para a produção de lâminas e painéis compensados; no entanto, a grande dificuldade está em encontrar espécies que possam promover o fornecimento contínuo de madeira e que possibilitem a produção de toras de tamanhos e formas adequadas para a laminação (Walker, 1993). Apesar de diversos autores apontarem que as espécies de rápido crescimento podem apresentar algumas limitações técnicas relacionadas à madeira – sobretudo, quanto aos aspectos de densidade, porosidade, presença de madeira de reação e grande proporção de madeira juvenil –, pesquisas sobre o comportamento da madeira destas espécies para laminação e produção de painéis compensados têm sido amplamente realizadas no Brasil; note-se que as lâminas de pinus já vêm sendo utilizadas pelas indústrias, desde o início da década de 1990 (Iwakiri et al, 2000). Objetivou-se avaliar a densidade da madeira, o rendimento em laminação e a qualidade das lâminas produzidas de duas posições de retirada das toras no tronco (A e B) de árvores de PEE × PCH
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