tag:blogger.com,1999:blog-89423188569650499682024-03-13T13:24:29.866-07:00soyperrofrediito llanoshttp://www.blogger.com/profile/02368351490789913926noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-8942318856965049968.post-86165829386276095212011-08-07T18:04:00.001-07:002011-08-07T18:04:24.316-07:00<div align="center" class="MsoNormal" style="text-align: center;"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;">PLASTICOS<span style="mso-spacerun: yes;"> </span><o:p></o:p></span></div><div align="center" class="MsoNormal" style="text-align: center;"><br />
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</div><div align="center" class="MsoNormal" style="text-align: center;"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;">Lic. Tulia Gonzales <o:p></o:p></span></div><div class="MsoNormal"><br />
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</div><div align="center" class="MsoNormal" style="text-align: center;"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;">INTRODUCCION <o:p></o:p></span></div><div align="center" class="MsoNormal" style="text-align: center;"><br />
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</div><div align="center" class="MsoNormal" style="text-align: center;"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;">Aquí les hablare sobre los plásticos como son, su clasificación, propiedades y características, proceso productivo y por ultimo sobre su reciclado. <o:p></o:p></span></div><div class="MsoNormal" style="line-height: 12.0pt; margin-bottom: .0001pt; margin-bottom: 0cm;"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES;">Estamos tan acostumbrados a utilizar los plásticos que a veces no somos conscientes de que el objeto que estamos utilizando es de este material.<o:p></o:p></span></div><div class="MsoNormal" style="line-height: 12.0pt; margin-bottom: .0001pt; margin-bottom: 0cm; text-align: justify;"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES;"><br />
Los plásticos han modificado nuestra forma de vivir y trabajar. Además de las bolsas de basura o los envases donde guardamos los alimentos, las prendas de vestir, ciertos materiales que se utilizan en cirugía, los equipos de las tecnologías de la información, algunos componentes de los automóviles y de las comunicaciones, entre otros, también se elaboran con este material.<br />
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De ahí que algunos científicos hayan denominado a las últimas décadas como la era de los plásticos.<o:p></o:p></span></div><div align="center" class="MsoNormal" style="text-align: center;"><br />
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</div><div align="center" class="MsoNormal" style="text-align: center;"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;">OBJETIVOS <o:p></o:p></span></div><div align="center" class="MsoNormal" style="text-align: center;"><br />
</div><div class="MsoListParagraphCxSpFirst" style="mso-list: l0 level1 lfo1; text-indent: -18.0pt;"><!--[if !supportLists]--><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%; mso-fareast-font-family: "Times New Roman";"><span style="mso-list: Ignore;">1.<span style="font: 7.0pt "Times New Roman";"> </span></span></span><!--[endif]--><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;">los plásticos <o:p></o:p></span></div><div class="MsoListParagraphCxSpMiddle"><br />
</div><div class="MsoListParagraphCxSpMiddle" style="mso-list: l0 level1 lfo1; text-indent: -18.0pt;"><!--[if !supportLists]--><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%; mso-fareast-font-family: "Times New Roman";"><span style="mso-list: Ignore;">2.<span style="font: 7.0pt "Times New Roman";"> </span></span></span><!--[endif]--><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;">clasificación de los plásticos <o:p></o:p></span></div><div class="MsoListParagraphCxSpMiddle"><br />
</div><div class="MsoListParagraphCxSpMiddle" style="mso-list: l0 level1 lfo1; text-indent: -18.0pt;"><!--[if !supportLists]--><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%; mso-fareast-font-family: "Times New Roman";"><span style="mso-list: Ignore;">3.<span style="font: 7.0pt "Times New Roman";"> </span></span></span><!--[endif]--><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;">propiedades y característica de los plásticos <span style="mso-spacerun: yes;"> </span><o:p></o:p></span></div><div class="MsoListParagraphCxSpMiddle"><br />
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</div><div align="center" class="MsoNormal" style="text-align: center;"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;">LOS PLASTICOS <o:p></o:p></span></div><div align="center" class="MsoNormal" style="text-align: center;"><br />
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</div><div align="center" class="MsoNormal" style="text-align: center;"><span class="apple-style-span"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;">El término</span></span><span class="apple-converted-space"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;"> </span></span><span class="apple-style-span"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%; mso-bidi-font-weight: bold;">plástico</span></span><span class="apple-converted-space"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;"> </span></span><span class="apple-style-span"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;">en su significación más general, se aplica a las sustancias de similares estructuras que carecen de un punto fijo de evaporación</span></span><span class="apple-converted-space"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;"> </span></span><span class="apple-style-span"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;">y poseen durante un intervalo de temperaturas propiedades de</span></span><span class="apple-converted-space"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;"> </span></span><a href="http://es.wikipedia.org/wiki/Elasticidad_(mec%C3%A1nica_de_s%C3%B3lidos)" title="Elasticidad (mecánica de sólidos)"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;">elasticidad</span></a><span class="apple-converted-space"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;"> </span></span><span class="apple-style-span"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;">y</span></span><span class="apple-converted-space"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;"> </span></span><a href="http://es.wikipedia.org/w/index.php?title=Flexibilidad_mec%C3%A1nica&action=edit&redlink=1" title="Flexibilidad mecánica (aún no redactado)"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;">flexibilidad</span></a><span class="apple-converted-space"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;"> </span></span><span class="apple-style-span"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;">que permiten moldearlas y adaptarlas a diferentes formas y aplicaciones. Sin embargo, en sentido concreto, nombra ciertos tipos de materiales sintéticos obtenidos mediante fenómenos de</span></span><span class="apple-converted-space"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;"> </span></span><a href="http://es.wikipedia.org/wiki/Polimerizaci%C3%B3n" title="Polimerización"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;">polimerización</span></a><span class="apple-converted-space"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;"> </span></span><span class="apple-style-span"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;">o multiplicación semi-natural de los átomos de carbono en las largas cadenas moleculares de compuestos orgánicos derivados del</span></span><span class="apple-converted-space"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;"> </span></span><span class="apple-style-span"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;">petróleo y otras<span style="mso-spacerun: yes;"> </span>sus sustancias naturales . <o:p></o:p></span></span></div><div align="center" class="MsoNormal" style="text-align: center;"><br />
</div><div class="MsoNormal"><span class="apple-style-span"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;">La palabra plástico se usó originalmente como adjetivo para denotar un escaso grado de movilidad y facilidad para adquirir cierta forma, sentido que se conserva en el término</span></span><span class="apple-converted-space"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;"> </span></span><a href="http://es.wikipedia.org/wiki/Plasticidad_(mec%C3%A1nica_de_s%C3%B3lidos)" title="Plasticidad (mecánica de sólidos)"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;">plasticidad</span></a><span class="apple-style-span"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;">.<o:p></o:p></span></span></div><span class="apple-style-span"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%; mso-ansi-language: ES; mso-bidi-language: AR-SA; mso-fareast-font-family: Calibri; mso-fareast-language: EN-US; mso-fareast-theme-font: minor-latin;"><br clear="all" style="page-break-before: always;" /> </span></span> <div class="MsoNormal"><br />
</div><div align="center" class="MsoNormal" style="text-align: center;"><span class="apple-converted-space"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;">CLASIFICACION DE LOS PLASTICOS <o:p></o:p></span></span></div><div align="center" class="MsoNormal" style="text-align: center;"><br />
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</div><div class="MsoNormal" style="line-height: 18.0pt; margin-bottom: 6.0pt; margin-left: 0cm; margin-right: 0cm; margin-top: 4.8pt;"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES;">En esta clasificación se considera el origen del </span><a href="http://es.wikipedia.org/wiki/Mon%C3%B3mero" title="Monómero"><span style="color: windowtext; font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES; text-decoration: none; text-underline: none;">monómero</span></a><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES;"> del cual parte la producción del polímero. <o:p></o:p></span></div><div class="MsoNormal" style="line-height: 18.0pt; margin-bottom: 1.2pt; margin-left: 18.0pt; mso-list: l1 level1 lfo2; mso-margin-top-alt: auto; tab-stops: list 36.0pt; text-indent: -18.0pt;"><!--[if !supportLists]--><span style="font-family: Wingdings; font-size: 10.0pt; mso-bidi-font-family: Wingdings; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: Wingdings; mso-fareast-language: ES;"><span style="mso-list: Ignore;">§<span style="font: 7.0pt "Times New Roman";"> </span></span></span><!--[endif]--><a href="http://es.wikipedia.org/wiki/Naturales" title="Naturales"><span style="color: windowtext; font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES; text-decoration: none; text-underline: none;">Naturales</span></a><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES;">: Son los polímeros cuyos monómeros son derivados de productos de origen natural con ciertas características como, por ejemplo, la </span><a href="http://es.wikipedia.org/wiki/Celulosa" title="Celulosa"><span style="color: windowtext; font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES; text-decoration: none; text-underline: none;">celulosa</span></a><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES;">, la </span><a href="http://es.wikipedia.org/wiki/Case%C3%ADna" title="Caseína"><span style="color: windowtext; font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES; text-decoration: none; text-underline: none;">caseína</span></a><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES;"> y el caucho. Dentro de dos de estos ejemplos existen otros plásticos de los cuales provienen:<o:p></o:p></span></div><div class="MsoNormal" style="line-height: 18.0pt; margin-bottom: 1.2pt; margin-left: 36.0pt; mso-list: l1 level2 lfo2; mso-margin-top-alt: auto; tab-stops: list 72.0pt; text-indent: -18.0pt;"><!--[if !supportLists]--><span style="font-family: Wingdings; font-size: 10.0pt; mso-bidi-font-family: Wingdings; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: Wingdings; mso-fareast-language: ES;"><span style="mso-list: Ignore;">§<span style="font: 7.0pt "Times New Roman";"> </span></span></span><!--[endif]--><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES;">Los derivados de la celulosa son: el celuloide, el celofán y el cellón.<o:p></o:p></span></div><div class="MsoNormal" style="line-height: 18.0pt; margin-bottom: 1.2pt; margin-left: 36.0pt; mso-list: l1 level2 lfo2; mso-margin-top-alt: auto; tab-stops: list 72.0pt; text-indent: -18.0pt;"><!--[if !supportLists]--><span style="font-family: Wingdings; font-size: 10.0pt; mso-bidi-font-family: Wingdings; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: Wingdings; mso-fareast-language: ES;"><span style="mso-list: Ignore;">§<span style="font: 7.0pt "Times New Roman";"> </span></span></span><!--[endif]--><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES;">Los derivados del caucho son: la goma y la ebonita.<o:p></o:p></span></div><div class="MsoNormal" style="line-height: 18.0pt; margin-bottom: 1.2pt; margin-left: 18.0pt; mso-list: l1 level1 lfo2; mso-margin-top-alt: auto; tab-stops: list 36.0pt; text-indent: -18.0pt;"><!--[if !supportLists]--><span style="font-family: Wingdings; font-size: 10.0pt; mso-bidi-font-family: Wingdings; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: Wingdings; mso-fareast-language: ES;"><span style="mso-list: Ignore;">§<span style="font: 7.0pt "Times New Roman";"> </span></span></span><!--[endif]--><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES;">Sintéticos: Son aquellos que tienen origen en productos elaborados por el hombre, principalmente derivados del </span><a href="http://es.wikipedia.org/wiki/Petr%C3%B3leo" title="Petróleo"><span style="color: windowtext; font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES; text-decoration: none; text-underline: none;">petróleo</span></a><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES;"> como lo son las bolsas de </span><a href="http://es.wikipedia.org/wiki/Polietileno" title="Polietileno"><span style="color: windowtext; font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES; text-decoration: none; text-underline: none;">polietileno</span></a><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES;"><o:p></o:p></span></div><div align="center" class="MsoNormal" style="text-align: center;"><br />
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</div><div align="center" class="MsoNormal" style="text-align: center;"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;">PROPIEDADES Y CARACTERISTICA DE LOS PLASTICOS <o:p></o:p></span></div><div class="MsoNormal"><br />
</div><div class="MsoNormal" style="line-height: 18.0pt; margin-bottom: 6.0pt; margin-left: 0cm; margin-right: 0cm; margin-top: 4.8pt;"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES;">Los plásticos son </span><a href="http://es.wikipedia.org/wiki/Sustancias_qu%C3%ADmicas" title="Sustancias químicas"><span style="color: windowtext; font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES; text-decoration: none; text-underline: none;">sustancias</span><span style="color: windowtext; font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES;"> </span><span style="color: windowtext; font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES; text-decoration: none; text-underline: none;">químicas</span></a><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES;"> sintéticas denominados </span><a href="http://es.wikipedia.org/wiki/Pol%C3%ADmero" title="Polímero"><span style="color: windowtext; font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES; text-decoration: none; text-underline: none;">polímeros</span></a><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES;">, de estructura macromolecular que puede ser moldeada mediante calor o presión y cuyo componente principal es el </span><a href="http://es.wikipedia.org/wiki/Carbono" title="Carbono"><span style="color: windowtext; font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES; text-decoration: none; text-underline: none;">carbono</span></a><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES;">. Estos polímeros son grandes agrupaciones de </span><a href="http://es.wikipedia.org/wiki/Mon%C3%B3mero" title="Monómero"><span style="color: windowtext; font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES; text-decoration: none; text-underline: none;">monómeros</span></a><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES;"> unidos mediante un proceso químico llamado polimerización. Los plásticos proporcionan el balance necesario de propiedades que no pueden lograrse con otros materiales por ejemplo: color, poco peso, tacto agradable y resistencia a la degradación ambiental y biológica.<o:p></o:p></span></div><div class="MsoNormal" style="line-height: 18.0pt; margin-bottom: 6.0pt; margin-left: 0cm; margin-right: 0cm; margin-top: 4.8pt;"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES;">De hecho, plástico se refiere a un estado del material, pero no al material en sí: los polímeros sintéticos habitualmente llamados plásticos, son en realidad materiales sintéticos que pueden alcanzar el estado plástico, esto es cuando el material se encuentra viscoso o fluido, y no tiene propiedades de </span><a href="http://es.wikipedia.org/wiki/Resistencia_de_materiales" title="Resistencia de materiales"><span style="color: windowtext; font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES; text-decoration: none; text-underline: none;">resistencia</span></a><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES;"> a </span><a href="http://es.wikipedia.org/wiki/Esfuerzo_interno" title="Esfuerzo interno"><span style="color: windowtext; font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES; text-decoration: none; text-underline: none;">esfuerzos</span><span style="color: windowtext; font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES;"> </span><span style="color: windowtext; font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES; text-decoration: none; text-underline: none;">mecánicos</span></a><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES;">. Este estado se alcanza cuando el material en estado sólido se transforma en estado plástico generalmente por calentamiento, y es ideal para los diferentes procesos productivos ya que en este estado es cuando el material puede manipularse de las distintas formas que existen en la actualidad. Así que la palabra plástico es una forma de referirse a materiales sintéticos capaces de entrar en un estado plástico, pero plástico no es necesariamente el grupo de materiales a los que cotidianamente hace referencia esta palabra.<o:p></o:p></span></div><div class="MsoNormal" style="line-height: 18.0pt; margin-bottom: 6.0pt; margin-left: 0cm; margin-right: 0cm; margin-top: 4.8pt;"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES;">Las propiedades y características de la mayoría de los plásticos (aunque no siempre se cumplen en determinados plásticos especiales) son estas:<o:p></o:p></span></div><div class="MsoNormal" style="line-height: 18.0pt; margin-bottom: 1.2pt; margin-left: 18.0pt; mso-list: l2 level1 lfo3; mso-margin-top-alt: auto; tab-stops: list 36.0pt; text-indent: -18.0pt;"><!--[if !supportLists]--><span style="font-family: Wingdings; font-size: 10.0pt; mso-bidi-font-family: Wingdings; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: Wingdings; mso-fareast-language: ES;"><span style="mso-list: Ignore;">§<span style="font: 7.0pt "Times New Roman";"> </span></span></span><!--[endif]--><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES;">fáciles de trabajar y </span><a href="http://es.wikipedia.org/wiki/Molde" title="Molde"><span style="color: windowtext; font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES; text-decoration: none; text-underline: none;">moldear</span></a><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES;">,<o:p></o:p></span></div><div class="MsoNormal" style="line-height: 18.0pt; margin-bottom: 1.2pt; margin-left: 18.0pt; mso-list: l2 level1 lfo3; mso-margin-top-alt: auto; tab-stops: list 36.0pt; text-indent: -18.0pt;"><!--[if !supportLists]--><span style="font-family: Wingdings; font-size: 10.0pt; mso-bidi-font-family: Wingdings; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: Wingdings; mso-fareast-language: ES;"><span style="mso-list: Ignore;">§<span style="font: 7.0pt "Times New Roman";"> </span></span></span><!--[endif]--><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES;">tienen un bajo costo de producción,<o:p></o:p></span></div><div class="MsoNormal" style="line-height: 18.0pt; margin-bottom: 1.2pt; margin-left: 18.0pt; mso-list: l2 level1 lfo3; mso-margin-top-alt: auto; tab-stops: list 36.0pt; text-indent: -18.0pt;"><!--[if !supportLists]--><span style="font-family: Wingdings; font-size: 10.0pt; mso-bidi-font-family: Wingdings; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: Wingdings; mso-fareast-language: ES;"><span style="mso-list: Ignore;">§<span style="font: 7.0pt "Times New Roman";"> </span></span></span><!--[endif]--><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES;">poseen baja </span><a href="http://es.wikipedia.org/wiki/Densidad_(f%C3%ADsica)" title="Densidad (física)"><span style="color: windowtext; font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES; text-decoration: none; text-underline: none;">densidad</span></a><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES;">,<o:p></o:p></span></div><div class="MsoNormal" style="line-height: 18.0pt; margin-bottom: 1.2pt; margin-left: 18.0pt; mso-list: l2 level1 lfo3; mso-margin-top-alt: auto; tab-stops: list 36.0pt; text-indent: -18.0pt;"><!--[if !supportLists]--><span style="font-family: Wingdings; font-size: 10.0pt; mso-bidi-font-family: Wingdings; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: Wingdings; mso-fareast-language: ES;"><span style="mso-list: Ignore;">§<span style="font: 7.0pt "Times New Roman";"> </span></span></span><!--[endif]--><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES;">suelen ser </span><a href="http://es.wikipedia.org/wiki/Permeabilidad" title="Permeabilidad"><span style="color: windowtext; font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES; text-decoration: none; text-underline: none;">impermeables</span></a><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES;">,<o:p></o:p></span></div><div class="MsoNormal" style="line-height: 18.0pt; margin-bottom: 1.2pt; margin-left: 18.0pt; mso-list: l2 level1 lfo3; mso-margin-top-alt: auto; tab-stops: list 36.0pt; text-indent: -18.0pt;"><!--[if !supportLists]--><span style="font-family: Wingdings; font-size: 10.0pt; mso-bidi-font-family: Wingdings; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: Wingdings; mso-fareast-language: ES;"><span style="mso-list: Ignore;">§<span style="font: 7.0pt "Times New Roman";"> </span></span></span><!--[endif]--><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES;">buenos </span><a href="http://es.wikipedia.org/wiki/Aislante_el%C3%A9ctrico" title="Aislante eléctrico"><span style="color: windowtext; font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES; text-decoration: none; text-underline: none;">aislantes</span><span style="color: windowtext; font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES;"> </span><span style="color: windowtext; font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES; text-decoration: none; text-underline: none;">eléctricos</span></a><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES;">,<o:p></o:p></span></div><div class="MsoNormal" style="line-height: 18.0pt; margin-bottom: 1.2pt; margin-left: 18.0pt; mso-list: l2 level1 lfo3; mso-margin-top-alt: auto; tab-stops: list 36.0pt; text-indent: -18.0pt;"><!--[if !supportLists]--><span style="font-family: Wingdings; font-size: 10.0pt; mso-bidi-font-family: Wingdings; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: Wingdings; mso-fareast-language: ES;"><span style="mso-list: Ignore;">§<span style="font: 7.0pt "Times New Roman";"> </span></span></span><!--[endif]--><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES;">aceptables </span><a href="http://es.wikipedia.org/wiki/Aislante_ac%C3%BAstico" title="Aislante acústico"><span style="color: windowtext; font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES; text-decoration: none; text-underline: none;">aislantes</span><span style="color: windowtext; font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES;"> </span><span style="color: windowtext; font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES; text-decoration: none; text-underline: none;">acústicos</span></a><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES;">,<o:p></o:p></span></div><div class="MsoNormal" style="line-height: 18.0pt; margin-bottom: 1.2pt; margin-left: 18.0pt; mso-list: l2 level1 lfo3; mso-margin-top-alt: auto; tab-stops: list 36.0pt; text-indent: -18.0pt;"><!--[if !supportLists]--><span style="font-family: Wingdings; font-size: 10.0pt; mso-bidi-font-family: Wingdings; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: Wingdings; mso-fareast-language: ES;"><span style="mso-list: Ignore;">§<span style="font: 7.0pt "Times New Roman";"> </span></span></span><!--[endif]--><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES;">buenos </span><a href="http://es.wikipedia.org/wiki/Aislante_t%C3%A9rmico" title="Aislante térmico"><span style="color: windowtext; font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES; text-decoration: none; text-underline: none;">aislantes</span><span style="color: windowtext; font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES;"> </span><span style="color: windowtext; font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES; text-decoration: none; text-underline: none;">térmicos</span></a><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES;">, aunque la mayoría no resisten temperaturas muy elevadas,<o:p></o:p></span></div><div class="MsoNormal" style="line-height: 18.0pt; margin-bottom: 1.2pt; margin-left: 18.0pt; mso-list: l2 level1 lfo3; mso-margin-top-alt: auto; tab-stops: list 36.0pt; text-indent: -18.0pt;"><!--[if !supportLists]--><span style="font-family: Wingdings; font-size: 10.0pt; mso-bidi-font-family: Wingdings; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: Wingdings; mso-fareast-language: ES;"><span style="mso-list: Ignore;">§<span style="font: 7.0pt "Times New Roman";"> </span></span></span><!--[endif]--><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES;">resistentes a la </span><a href="http://es.wikipedia.org/wiki/Corrosi%C3%B3n" title="Corrosión"><span style="color: windowtext; font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES; text-decoration: none; text-underline: none;">corrosión</span></a><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES;"> y a muchos factores químicos;<o:p></o:p></span></div><div class="MsoNormal" style="line-height: 18.0pt; margin-bottom: 1.2pt; margin-left: 18.0pt; mso-list: l2 level1 lfo3; mso-margin-top-alt: auto; tab-stops: list 36.0pt; text-indent: -18.0pt;"><!--[if !supportLists]--><span style="font-family: Wingdings; font-size: 10.0pt; mso-bidi-font-family: Wingdings; mso-bidi-font-size: 12.0pt; mso-fareast-font-family: Wingdings; mso-fareast-language: ES;"><span style="mso-list: Ignore;">§<span style="font: 7.0pt "Times New Roman";"> </span></span></span><!--[endif]--><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES;">algunos no son </span><a href="http://es.wikipedia.org/wiki/Biodegradable" title="Biodegradable"><span style="color: windowtext; font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES; text-decoration: none; text-underline: none;">biodegradables</span></a><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES;"> ni fáciles de </span><a href="http://es.wikipedia.org/wiki/Reciclar" title="Reciclar"><span style="color: windowtext; font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES; text-decoration: none; text-underline: none;">reciclar</span></a><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES;">, y si se queman, son muy </span><a href="http://es.wikipedia.org/wiki/Contaminaci%C3%B3n" title="Contaminación"><span style="color: windowtext; font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES; text-decoration: none; text-underline: none;">contaminantes</span></a><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: ES;">.<o:p></o:p></span></div><div align="center" class="MsoNormal" style="text-align: center;"><br />
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</div><div align="center" class="MsoNormal" style="text-align: center;"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;">PROCESO PRODUCTIVO <o:p></o:p></span></div><div align="center" class="MsoNormal" style="text-align: center;"><br />
</div><div align="center" class="MsoNormal" style="text-align: center;"><span class="apple-style-span"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;">La primera parte de la producción de plásticos consiste en la elaboración de</span></span><span class="apple-converted-space"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;"> </span></span><a href="http://es.wikipedia.org/wiki/Pol%C3%ADmero" title="Polímero"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;">polímeros</span></a><span class="apple-converted-space"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;"> </span></span><span class="apple-style-span"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;">en la</span></span><span class="apple-converted-space"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;"> </span></span><a href="http://es.wikipedia.org/wiki/Industria_qu%C3%ADmica" title="Industria química"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;">industria química</span></a><span class="apple-style-span"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;">. Hoy en día la recuperación de plásticos post-consumidor es esencial también. Parte de los plásticos terminados por la industria se usan directamente en forma de grano o resina. Más frecuentemente, se utilizan varias formas de</span></span><span class="apple-converted-space"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;"> </span></span><a href="http://es.wikipedia.org/wiki/Moldeo" title="Moldeo"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;">moldeo</span></a><span class="apple-style-span"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;">(por</span></span><span class="apple-converted-space"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;"> </span></span><a href="http://es.wikipedia.org/wiki/Moldeo_por_inyecci%C3%B3n" title="Moldeo por inyección"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;">inyección</span></a><span class="apple-style-span"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;">, compresión, rotación, inflación, etc.) o la</span></span><span class="apple-converted-space"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;"> </span></span><a href="http://es.wikipedia.org/wiki/Extrusi%C3%B3n_de_pol%C3%ADmero" title="Extrusión de polímero"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;">extrusión</span></a><span class="apple-converted-space"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;"> </span></span><span class="apple-style-span"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;">de</span></span><span class="apple-converted-space"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;"> </span></span><a href="http://es.wikipedia.org/wiki/Perfil_met%C3%A1lico" title="Perfil metálico"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;">perfiles</span></a><span class="apple-converted-space"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;"> </span></span><span class="apple-style-span"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;">o</span></span><span class="apple-converted-space"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;"> </span></span><a href="http://es.wikipedia.org/wiki/Hilo" title="Hilo"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;">hilos</span></a><span class="apple-style-span"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;">. Parte del mayor proceso de plásticos se realiza en una máquina horneadora<o:p></o:p></span></span></div><span class="apple-style-span"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%; mso-ansi-language: ES; mso-bidi-language: AR-SA; mso-fareast-font-family: Calibri; mso-fareast-language: EN-US; mso-fareast-theme-font: minor-latin;"><br clear="all" style="mso-special-character: line-break; page-break-before: always;" /> </span></span> <div class="MsoNormal"><br />
</div><div align="center" class="MsoNormal" style="text-align: center;"><span class="apple-style-span"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;">EL RESICLAJE DE LOS PLASTICOS</span></span><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 115%;"><o:p></o:p></span></div><div align="center" class="MsoNormal" style="text-align: center;"><br />
</div><div align="center" style="line-height: 18.0pt; margin-bottom: 6.0pt; margin-left: 0cm; margin-right: 0cm; margin-top: 4.8pt; text-align: center;">Es fácil percibir cómo los desechos plásticos, por ejemplo de envases de líquidos como el aceite de cocina, no son susceptibles de asimilarse de nuevo en la naturaleza, porque su material tarda aproximadamente unos 180 años en degradarse.</div><div align="center" style="line-height: 18.0pt; margin-bottom: 6.0pt; margin-left: 0cm; margin-right: 0cm; margin-top: 4.8pt; text-align: center;">Ante esta realidad, se ha establecido el<span class="apple-converted-space"> </span><a href="http://es.wikipedia.org/wiki/Reciclado" title="Reciclado">reciclado</a><span class="apple-converted-space"> </span>de tales productos de plástico, que ha consistido básicamente en recolectarlos, limpiarlos, seleccionarlos por tipo de material y fundirlos de nuevo para usarlos como materia prima adicional, alternativa o sustituta para el moldeado de otros productos.</div><div align="center" style="line-height: 18.0pt; margin-bottom: 6.0pt; margin-left: 0cm; margin-right: 0cm; margin-top: 4.8pt; text-align: center;">De esta forma la humanidad ha encontrado una forma adecuada para evitar la<span class="apple-converted-space"> </span><a href="http://es.wikipedia.org/wiki/Contaminaci%C3%B3n" title="Contaminación">contaminación</a><span class="apple-converted-space"> </span>de productos que por su composición, materiales o componentes, no son fáciles de desechar de forma convencional.</div><div align="center" style="line-height: 18.0pt; margin-bottom: 6.0pt; margin-left: 0cm; margin-right: 0cm; margin-top: 4.8pt; text-align: center;">Se pueden salvar grandes cantidades de recursos naturales no renovables cuando en los procesos de producción se utilizan materiales "reciclados". Los recursos renovables, como los árboles, también pueden ser salvados. La utilización de productos reciclados disminuye el consumo de energía. Cuando se consuman menos combustibles fósiles, se generará menos CO2 y por lo tanto habrá menos lluvia ácida y se reducirá el efecto invernadero.</div><div align="center" style="line-height: 18.0pt; margin-bottom: 6.0pt; margin-left: 0cm; margin-right: 0cm; margin-top: 4.8pt; text-align: center;">Desde el punto de vista financiero: Un buen proceso de reciclaje es capaz de generar ingresos. Por lo anteriormente expuesto, se hace ineludible mejorar y establecer nuevas tecnologías en cuanto a los procesos de recuperación de plásticos y buscar solución a este problema tan nocivo para la sociedad y que día a día va en aumento deteriorando al medio ambiente. En las secciones siguientes se plantea el diseño de un fundidor para polietileno de baja densidad, su uso, sus características, recomendación y el impacto positivo que proporcionará a la comunidad.</div><div align="center" style="line-height: 18.0pt; margin-bottom: 6.0pt; margin-left: 0cm; margin-right: 0cm; margin-top: 4.8pt; text-align: center;">Algunos plásticos no son recuperables, como el polietileno cristal y la bakelita.</div><div align="center" class="MsoNormal" style="text-align: center;"><br />
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</div>frediito llanoshttp://www.blogger.com/profile/02368351490789913926noreply@blogger.com1