Interfacial Adhesion and Damping Characteristics of Laminated Veneer Lumber Intercalated with Rubber Sheets

Abstract

Laminated wood veneer lumber intercalated with rubber sheets (LLVR) was fabricated using a layered adhesive system composed of polyaryl polymethylene isocyanate (PAPI) for wood-rubber inter-bonding and phenol formaldehyde (PF) resin to glue the wood veneers. The optimized manufacturing process (chloroprene rubber: CR; PAPI: 80 g/m 2 ; PF: 200 g/m 2 ; and silane: 9.0 wt.%) was determined. The process as developed was then utilized to fabricate nine-ply LLVRs of five balanced constructions with two or three CR laminates used as various layers. The physico-mechanical properties of the LLVRs were evaluated, and the results showed that LLVRs had strong shear strength, sound dimensional stability, decent bending strength, and favorable toughening and buffering performances. The newly developed product is an interesting potential alternative to traditional laminated veneer lumber or plywood.

Eficiência da colagem em madeira de kiri japonês (Paulownia tomentosa)

“…A microscopia permitiu a visualização dos adesivos nas estruturas anatômicas da madeira P. tomentosa e avaliação da qualidade de colagem. A importância dessa técnica para observação da linha de cola no processo de adesão é evidenciada por SINGH et al (2008), ALBINO et al (2010), BIANCHE (2014), HAN et al (2016), MODZEL et al (2011 e URBINATI (2013) pois permite observar o comportamento do adesivo e como este penetra nos elementos celulares.…”