<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>1405-0471</journal-id>
<journal-title><![CDATA[Madera y bosques]]></journal-title>
<abbrev-journal-title><![CDATA[Madera bosques]]></abbrev-journal-title>
<issn>1405-0471</issn>
<publisher>
<publisher-name><![CDATA[Instituto de Ecología A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1405-04712023000200104</article-id>
<article-id pub-id-type="doi">10.21829/myb.2023.2922439</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Elaboración y caracterización de pisos de ingeniería elaborados con maderas de diferentes densidades]]></article-title>
<article-title xml:lang="en"><![CDATA[Elaboration and characterization of engineered floors made with woods of different densities]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Barrera Cruz]]></surname>
<given-names><![CDATA[Omar Isaí]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez Anda]]></surname>
<given-names><![CDATA[Raúl]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Silva Guzmán]]></surname>
<given-names><![CDATA[José Antonio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fuentes Talavera]]></surname>
<given-names><![CDATA[Francisco Javier]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Guadalajara Centro Universitario de Ciencias Exactas e Ingenierías ]]></institution>
<addr-line><![CDATA[Zapopan Jalisco]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Guadalajara Centro Universitario de Ciencias Exactas e Ingenierías ]]></institution>
<addr-line><![CDATA[Zapopan Jalisco]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2023</year>
</pub-date>
<volume>29</volume>
<numero>2</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-04712023000200104&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-04712023000200104&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-04712023000200104&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Una opción para incrementar el valor de las maderas de baja densidad puede ser el combinarlas con especies de densidades más altas. A los productos que combinan madera de diferentes propiedades se les conoce como productos de ingeniería. El presente trabajo tuvo como objetivo diseñar, producir y evaluar, a través de sus propiedades físicomecánicas, un piso de ingeniería de 16 mm de espesor. Este producto se conformó de tres capas, utilizando palma de coco (Cocos nucifera) o melina (Gmelina arborea) como sustrato y encino rojo (Quercus castanea) como refuerzo. Se ensayaron tres tipos de adhesivos: urea formaldehido, henkel loctite y soya furfural. Con los dos sustratos utilizados, se obtuvo una densidad normal promedio de 0.53 g cm-3 a un contenido de humedad promedio de 9%. La resistencia a la flexión fluctuó entre 12 MPa y 62 MPa y el módulo de elasticidad entre 1346 MPa y 10 660 MPa. La combinación de encino-melinaencino con urea formaldehido fue la que presentó los mejores resultados. La dureza Brinell exhibió valores de 30 N mm-2 a 48 N mm-2 y la combinación encino-palma-encino con loctite fue la que arrojó el mayor valor. La resistencia al cortante de la línea de encolado fue de 0.11 MPa a 3.46 MPa. Las combinaciones encino-palma-encino soya furfural, encino-palma-encino urea formaldehido, así como encino-melina-encino urea formaldehido no presentaron diferencias estadísticas significativas en la resistencia de la línea adhesiva. Los pisos con urea formaldehido y con soya furfural fueron susceptibles a la delaminación al contacto directo con el agua y ante cambios de humedad relativa en el ambiente de 35% y 55%.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract A possible option to increase the value of low-density woods may be to combine species with different densities. The manufacture of boards involving joining and mixing wood with different properties is known as an engineering product. The present work aimed to design, produce, and evaluate a 16 mm-thick three-layer engineered floor using coconut palm (Cocos nucifera) or melina (Gmelina arborea) as substrate and reinforced with red oak (Quercus castanea) using three types of adhesives: urea formaldehyde, henkel loctite and soy furfural. The results, with both wood substrates, showed an average specific weight of 0.53 g cm-3 and an average moisture content of 9%. The flexural strength ranged from 12 MPa to 62 MPa and from 1346 MPa to 10 660 MPa in modulus of elasticity, the combination of oak-melina-oak with urea formaldehyde being the one that presented the best results. Brinell hardness exhibits strengths from 30 N mm-2 to 48 N mm-2 with the oak-palm-oak combination with loctite achieving the highest value. The shear resistance of the gluing line renged from 0.11 MPa to 3.46 MPa, with the oak-palm-oak with soya furfural, oak-palm-oak with urea formaldehyde, as well as oak-melina-oak urea formaldehyde combinations showing no statistical differences. In delamination, floors with urea formaldehyde and furfural soy are susceptible to delamination by direct contact with water and while being subjected to dry changes in relative humidity in the environment of 35% and 55%.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[adhesivo verde]]></kwd>
<kwd lng="es"><![CDATA[Cocos nucifera]]></kwd>
<kwd lng="es"><![CDATA[delaminación]]></kwd>
<kwd lng="es"><![CDATA[Gmelina arborea]]></kwd>
<kwd lng="es"><![CDATA[propiedades físico-mecánicas]]></kwd>
<kwd lng="es"><![CDATA[Quercus castanea]]></kwd>
<kwd lng="en"><![CDATA[green adhesive]]></kwd>
<kwd lng="en"><![CDATA[Cocos nucifera]]></kwd>
<kwd lng="en"><![CDATA[delamination]]></kwd>
<kwd lng="en"><![CDATA[Gmelina arborea]]></kwd>
<kwd lng="en"><![CDATA[physical-mechanical properties]]></kwd>
<kwd lng="en"><![CDATA[Quercus castanea]]></kwd>
</kwd-group>
</article-meta>
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