Urea Formaldehyde
Mostrando 13-24 de 41 artigos, teses e dissertações.
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13. 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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14. 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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15. 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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16. Density profile as a tool in assessing quality of new composite
This paper present a study to apply the X-ray densitometry technique in obtaining density profiles, along the thickness of new composites made from eucalyptus fibers and sugarcane bagasse particles. Experimental panels were made in treatments with different percentages of both raw materials and bonded with two urea formaldehyde resin percentages, 13% and 16%
Mat. Res.. Publicado em: 08/11/2013
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17. Some physical and mechanical properties of medium-density fiberboard made from giant bamboo
The objective of this study was to evaluate the density, density profile, water swelling and absorption, modulus of elasticity and rupture from static bending, and tensile strength of experimental medium-density fiberboards manufactured using Dendrocalamus giganteus (Munro bamboo). The fiber production was carried out through the chemo-thermo-mechanical pulp
Mat. Res.. Publicado em: 02/08/2013
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18. 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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19. 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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20. PROPRIEDADES FÍSICO-MECÂNICAS E RESISTÊNCIA A BIODETERIORADORES DE CHAPAS AGLOMERADAS CONSTITUÍDAS POR DIFERENTES PROPORÇÕES DE MADEIRA E CASCA DE ARROZ / PHYSICAL-MECHANICAL PROPERTIES AND DECAY RESISTANCE OF WOOD AND RICE HUSK PARTICLEBOARD IN DIFFERENT PROPORTIONS
This work aimed at evaluating the quality of particleboards manufactured with different wood proportions (Eucalyptus grandis W. Hill. ex Maiden) and rice husk. The composites were produced in the proportions 0, 20, 40, 60, 80 and 100% of peels of rice with the use of urea-formaldehyde and tannin-formaldehyde adhesives. In order to characterize the quality of
Publicado em: 2009
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21. 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
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22. Potential of Australian Cedar wood (Toona ciliata M. Roem var. australis) for the manufacturing of greater added value products / Potencial da madeira de Cedro Australiano (Toona ciliata M. Roem var. australis) na manufatura de produtos de maior valor agregado
The objective of this work was to study the potential of 4 and 18 years old wood of Australian Cedar (Toona ciliata) for the production of plywood, OSB, particleboard and cement-wood panels. The woods from four different places were compared: Campo Belo, Cana Verde, Santo Antônio do Amparo and Marechal Floriano. Plywood panels containing 5 veneers were prod
Publicado em: 2009
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23. Boards produced with Wood of eucalyptus: Case study of species and provenances / PainÃis de madeira de Eucalipto: Estudo de caso de espÃcies e precedÃncias
This work aimed at the evaluation of fifteen provenances coming from species of Eucalyptus cloeziana, Eucalyptus grandis and Eucalyptus saligna; in the manufacture of plywoods and particle boards. The basic density and chemical composition of the trees were measured initially. Six boards per modality of plate for each provenance were manufactured. In the ven
Publicado em: 2008
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24. Utilização de adesivos à base de taninos de Acácia Negra e Eucalyptus pellita para fabricação de painéis OSB. / Utilization of tannin from acacia and Eucalyptus pellita as resin for OSB production.
The purpose of the present work was to study the viability of the utilization of the tannins of the bark from Acacia mearnsii and of Eucalyptus pellita wood, as adhesive (Tannin- Formaldehyde) for the OSB production. Seven condition of extraction (water at 100C, water / 1% urea, water/2% urea, water/5% urea, water/1% sodium sulphite, water/ 2% sodium sulphit
Publicado em: 2006