Ureaformaldehyde
Mostrando 1-12 de 21 artigos, teses e dissertações.
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1. Painéis de pínus e bagaço de cana empregando-se dois adesivos para uso na construção civil
Resumo O presente trabalho objetivou produzir e avaliar painéis aglomerados empregando-se partículas de bagaço de cana-de-açúcar (Saccharum officinarum) e de pínus (Pinus taeda, Pinus elliottii), comparando-se a eficiência de dois adesivos, ureia-formaldeído e poliuretano derivado do óleo de mamona. Os painéis foram preparados com 60% de partícula
Ambient. constr.. Publicado em: 03/10/2019
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2. THERMAL MODIFICATION OF SUGARCANE WASTE AND BAMBOO PARTICLES FOR THE MANUFACTURE OF PARTICLEBOARDS
RESUMO A modificação térmica de partículas de painéis constituídos de resíduos agroflorestais e industriais pode incorporar melhorias na estabilidade dimensional (variação na espessura) e reduzir a utilização de produtos químicos, que podem onerar o processo ou serem nocivos ao homem e ao meio ambiente. Assim, o objetivo da pesquisa foi avaliar o
Rev. Árvore. Publicado em: 23/09/2019
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3. Propriedades de adesivo aplicado em painéis a partir da substituição por lignossulfonato do processo sulfito
Resumo Considerando a indústria de painéis aglomerados, a maior parte utiliza adesivos sintéticos, especialmente, à base de ureia-formaldeído, e nesse sentido, estudos que englobam as características de materiais alternativas para a indústria de painéis tornam-se importantes, especialmente quando se considera o custo final dos produtos gerados. O pre
Ciênc. Florest.. Publicado em: 30/05/2019
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4. Pure and Decorative Plywood Panels from Cordia trichotoma and Grevillea robusta
ABSTRACT The objective of this study was to evaluate the technical viability of Cordia trichotoma and Grevillea robusta wood for the production of plywood panels, as well as to verify the behavior of these species in combination with Pinus taeda and Eucalyptus saligna. Panels were produced using veneers of each species and in combination, totaling 8 treatme
Floresta Ambient.. Publicado em: 26/07/2018
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5. Particleboard Panels Produced with Different Radial Positions of Pinus oocarpa Wood
ABSTRACT The aim of this study was to evaluate the effect of different radial regions of Pinus oocarpa wood on the physical and mechanical properties of particleboard panels. Three different radial regions (internal, intermediate and external) and the mixture (integral log) were assessed. Experimental panels were produced with a nominal density of 0.70 g/cm3
Floresta Ambient.. Publicado em: 01/02/2018
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6. The Effect of Post-Heat Treatment in MDF Panels
This study was to evaluate the effect of post-heat treatment on the physical and mechanical properties of MDF (Medium Density Fiberboard) panels. Commercial MDF panels were produced in Brazil using Pinus wood and urea-formaldehyde (UF) adhesive. The post-heat treatments were carried in a factorial 3 x 2 (three temperatures of heat treatment - 200, 225 and 25
Mat. Res.. Publicado em: 05/01/2017
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7. Combined effect of thermoplastic and thermosetting adhesives on properties of particleboard with rice husk core
This study investigated the combined effect of adhesive type and content on the dimensional stability and mechanical properties of three-layer particleboards made from a mixture of wood particles (face layer: 30 wt %) and rice husk particles (core layer: 70 wt %). Two types of thermosetting adhesives, liquid urea-formaldehyde (UF) and phenol-formaldehyde (PF
Mat. Res.. Publicado em: 09/09/2014
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8. Physical and mechanical properties of particleboard bamboo waste bonded with urea formaldehyde and castor oil based adhesive
This study evaluated the physical and mechanical characteristics of particleboards made of bamboo waste from the species Dendrocalamus giganteus bonded with two different types of adhesives: urea-formaldehyde (UF) and a castor oil based adhesive (M). Thus, eight types of particleboards were produced in the proportions of 6%, 8%, 10% and 12% for each adhesiv
Matéria (Rio J.). Publicado em: 2014-03
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9. Relation of transverse air permeability with physical properties in different compositions of sugarcane bagasse particleboards
Studies concerning the production of particleboards with sugarcane bagasse as an alternative fibrous material have been carried out as an attempt to provide a sustainable and viable destination for this residue. This work aimed to evaluate the influence of several processing variables related to the microstructure of sugarcane bagasse particleboards (mat typ
Mat. Res.. Publicado em: 22/11/2012
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10. PROPRIEDADES FÍSICO-MECÂNICAS DE CHAPAS AGLOMERADAS PRODUZIDAS COM BAMBU, PINUS E EUCALIPTO. / PHYSICAL AND MECHANICAL PROPERTIES OF PARTICLEBOARD PRODUCED WITH BAMBOO, PINE AND EUCALYPT.
This study investigated the physical and mechanical properties of particleboards formed of bamboo (Bambusa tuldoides), pine (Pinus taeda) and eucalyptus (Eucalyptus grandis) and their combinations. To this end, panels were made, defined by the use of each type of particle pure or mixed by two or three being set 0, 25, 50, 75 and 100% of dry weight proportion
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/07/2011
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11. Efeito da inclusão laminar nas propriedades de painéis aglomerados fabricados com resíduos da indústria laminadora / Effect of the laminate inclusion in the properties of agglomerated panels manufactured with residues of the laminating industry
The interest in using wood industry residues motivated this research work, which aimed to produce agglomerate panels with three different lamination waste types of Schizolobium amazonicum Huber ex. Ducke (Paricá), applying the laminas inclusions technique. Ureaformaldehyde adhesive and sodium silicate were used for agglomerating, at 8% content and 10%, resp
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 05/11/2010
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12. Efeito da adição de carga e extensor nas propriedades do adesivo uréia-formaldeído e dos compensados de pinus e paricá / Effect of the addition of filler and extender on urea- formaldehyde adhesives and on pinus and paricá plywood properties
The objective of this study was to evaluate the effect of the addition of extender (wheat flour) and filler (babaçu flour) on urea-formaldehyde adhesive properties and on quality of plywood manufactured with Pinus elliottii e Schizolobium amazonicum (paricá) veneers. Ninety six three-layer plywood were produced, being forty eight produced with Pinus elliot
Publicado em: 2009