<\/span><\/h2>\n\n\n\nPlasty jsou syntetick\u00e9 nebo polosyntetick\u00e9 materi\u00e1ly vyr\u00e1b\u011bn\u00e9 v\u011bt\u0161inou z ropn\u00fdch deriv\u00e1t\u016f, i kdy\u017e n\u011bkter\u00e9 mohou b\u00fdt vyrobeny z obnoviteln\u00fdch zdroj\u016f.<\/p>\n\n\n\nVyzna\u010duj\u00ed se vysokou plasticitou \u2014 mohou se deformovat, ani\u017e by se zlomily. Pou\u017e\u00edvaj\u00ed se k v\u00fdrob\u011b obal\u016f, \u010d\u00e1st\u00ed dom\u00e1c\u00edch spot\u0159ebi\u010d\u016f, karoseri\u00ed, potrub\u00ed, hra\u010dek, syntetick\u00fdch textili\u00ed a mnoha dal\u0161\u00edch v\u00fdrobk\u016f.<\/p>\n\n\n\n
<\/span>Nerezov\u00e1 ocel<\/strong><\/span><\/h2>\n\n\n\nNerezov\u00e1 ocel je kovov\u00e1 slitina slo\u017een\u00e1 z oby\u010dejn\u00e9 oceli a minim\u00e1ln\u011b 12 % chr\u00f3mu; n\u011bkdy obsahuje i nikl. Je velmi odoln\u00e1 v\u016f\u010di oxidaci a atmosf\u00e9rick\u00e9 korozi, p\u0159edev\u0161\u00edm d\u00edky obsahu chr\u00f3mu.<\/p>\n\n\n\nM\u00e1 \u0161irok\u00e9 vyu\u017eit\u00ed a b\u011b\u017en\u011b se pou\u017e\u00edv\u00e1 p\u0159i v\u00fdrob\u011b dom\u00e1c\u00edch spot\u0159ebi\u010d\u016f, kuchy\u0148sk\u00e9ho n\u00e1\u010din\u00ed, automobil\u016f, budov a dal\u0161\u00edch v\u00fdrobk\u016f.<\/p>\n\n\n\n
<\/span>Karton<\/strong><\/span><\/h2>\n\n\n\nKarton je um\u011bl\u00fd materi\u00e1l tvo\u0159en\u00fd n\u011bkolika vrstvami pap\u00edru z prim\u00e1rn\u00edch nebo recyklovan\u00fdch vl\u00e1ken. Je tvrd\u0161\u00ed a odoln\u011bj\u0161\u00ed ne\u017e pap\u00edr a dok\u00e1\u017ee un\u00e9st zna\u010dnou hmotnost, ani\u017e by se deformoval nebo roztrhl.<\/p>\n\n\n\nPou\u017e\u00edv\u00e1 se hlavn\u011b k v\u00fdrob\u011b krabic pro balen\u00ed a ochranu r\u016fzn\u00fdch produkt\u016f.<\/p>\n\n\n\n
<\/span>Sklo<\/strong><\/span><\/h2>\n\n\n\nSklo je anorganick\u00fd materi\u00e1l, kter\u00fd je pr\u016fhledn\u00fd (i kdy\u017e m\u016f\u017ee b\u00fdt zbarven\u00fd), k\u0159ehk\u00fd, tvrd\u00fd a amorfn\u00ed p\u0159i pokojov\u00e9 teplot\u011b.<\/p>\n\n\n\nA\u010dkoli m\u016f\u017ee vznikat p\u0159irozen\u011b, vyr\u00e1b\u00ed se tak\u00e9 \u010dlov\u011bkem z k\u0159emi\u010dit\u00e9ho p\u00edsku, uhli\u010ditanu sodn\u00e9ho a v\u00e1pence. D\u00edky sv\u00fdm vlastnostem je ide\u00e1ln\u00ed pro okna, vitr\u00e1\u017ee, n\u00e1doby, \u010do\u010dky a mnoho dal\u0161\u00edch v\u00fdrobk\u016f.<\/p>\n\n\n\n
<\/span>Bronz<\/strong><\/span><\/h2>\n\n\n\nBronz je kovov\u00e1 slitina tvo\u0159en\u00e1 p\u0159ev\u00e1\u017en\u011b m\u011bd\u00ed a 3\u201320 % c\u00ednu. Je to prvn\u00ed v\u00fdznamn\u00e1 slitina vytvo\u0159en\u00e1 \u010dlov\u011bkem a dala jm\u00e9no dob\u011b bronzov\u00e9.<\/p>\n\n\n\n
Po stalet\u00ed byl pou\u017e\u00edv\u00e1n k v\u00fdrob\u011b zbran\u00ed, n\u00e1stroj\u016f, soch, \u0161perk\u016f, hudebn\u00edch n\u00e1stroj\u016f, mechanick\u00fdch sou\u010d\u00e1st\u00ed a mnoha dal\u0161\u00edch p\u0159edm\u011bt\u016f.<\/p>\n\n\n\n
<\/span>Beton<\/strong><\/span><\/h2>\n\n\n\nBeton, zn\u00e1m\u00fd tak\u00e9 jako cementov\u00e1 sm\u011bs, je um\u011bl\u00fd materi\u00e1l slo\u017een\u00fd z cementu, p\u00edsku, \u0161t\u011brku, vody a specifick\u00fdch p\u0159\u00edsad.<\/p>\n\n\n\nJde o tv\u00e1rnou a soudr\u017enou sm\u011bs, kter\u00e1 po vytvrdnut\u00ed z\u00edsk\u00e1v\u00e1 vysokou odolnost. Vyu\u017e\u00edv\u00e1 se hlavn\u011b ve stavebnictv\u00ed na z\u00e1klady, pil\u00ed\u0159e, podlahy a dal\u0161\u00ed konstrukce.<\/p>\n\n\n\n
<\/span>Mosaz<\/strong><\/span><\/h2>\n\n\n\nMosaz je slitina m\u011bdi a zinku. Je to tv\u00e1rn\u00fd materi\u00e1l, kter\u00fd lze tvarovat i za studena \u2014 do plech\u016f, ty\u010d\u00ed a dal\u0161\u00edch forem. Jej\u00ed tv\u00e1rnost se li\u0161\u00ed podle slo\u017een\u00ed (p\u0159edev\u0161\u00edm pokud obsahuje i jin\u00e9 kovy) a teploty.<\/p>\n\n\n\n
Pou\u017e\u00edv\u00e1 se k v\u00fdrob\u011b bi\u017euterie, n\u00e1dob, dekorativn\u00edch prvk\u016f, kotl\u016f, zbran\u00ed a mnoha dal\u0161\u00edch p\u0159edm\u011bt\u016f.<\/p>\n\n\n\n
<\/span>Pap\u00edr<\/strong><\/span><\/h2>\n\n\n\nPap\u00edr je materi\u00e1l tvo\u0159en\u00fd tenk\u00fdm, obvykle b\u011blen\u00fdm listem, vyroben\u00fdm z vl\u00e1knit\u00e9 rostlinn\u00e9 hmoty.<\/p>\n\n\n\nTato hmota je rozpu\u0161t\u011bn\u00e1 ve vod\u011b a n\u00e1sledn\u011b su\u0161en\u00e1, aby vznikl v\u00fdsledn\u00fd materi\u00e1l. Pap\u00edr se pou\u017e\u00edv\u00e1 k psan\u00ed, kreslen\u00ed, balen\u00ed p\u0159edm\u011bt\u016f a mnoha dal\u0161\u00edm \u00fa\u010del\u016fm.<\/p>\n\n\n\n
<\/span>B\u00edl\u00e9 zlato<\/strong><\/span><\/h2>\n\n\n\nB\u00edl\u00e9 zlato je slitina zlata s kovem, kter\u00fd mu dod\u00e1v\u00e1 b\u011blavou barvu, jako je nikl, st\u0159\u00edbro, mangan nebo palladium. \u010casto se pokr\u00fdv\u00e1 rhodiem, proto\u017ee n\u011bkter\u00e9 sm\u011bsi nejsou p\u0159\u00edli\u0161 leskl\u00e9.<\/p>\n\n\n\n
Pou\u017e\u00edv\u00e1 se ve \u0161perka\u0159stv\u00ed jako levn\u011bj\u0161\u00ed, ale vzhledov\u011b atraktivn\u00ed alternativa k platin\u011b. M\u016f\u017ee b\u00fdt tak\u00e9 sou\u010d\u00e1st\u00ed elektronick\u00fdch za\u0159\u00edzen\u00ed.<\/p>\n\n\n\n
<\/span>Cihla<\/strong><\/span><\/h2>\n\n\n\nCihla je keramick\u00fd prvek ve tvaru kv\u00e1dru pou\u017e\u00edvan\u00fd ve stavebnictv\u00ed. Vyr\u00e1b\u00ed se z hl\u00edny vypalovan\u00e9 p\u0159i vysok\u00fdch teplot\u00e1ch, aby z\u00edskala svou charakteristickou tvrdost a odolnost. Pou\u017e\u00edv\u00e1 se ke stavb\u011b zd\u00ed, pil\u00ed\u0159\u016f a dal\u0161\u00edch konstrukc\u00ed.<\/p>\n\n\n
\n
\n
\n
<\/span>Co jsou p\u0159\u00edrodn\u00ed zdroje?<\/span><\/h3>\n\n\n
Kdy\u017e mluv\u00edme o um\u011bl\u00fdch zdroj\u00edch, m\u00e1me na mysli ty, kter\u00e9 jsou vyr\u00e1b\u011bny \u010dlov\u011bkem z materi\u00e1l\u016f nalezen\u00fdch v p\u0159\u00edrod\u011b.<\/p>\n\n<\/div>\n<\/div>\n
\n
<\/span>Jak\u00e9 jsou hlavn\u00ed p\u0159\u00edklady um\u011bl\u00fdch zdroj\u016f?<\/span><\/h3>\n\n\n
Mezi hlavn\u00ed p\u0159\u00edklady pat\u0159\u00ed: cihly, b\u00edl\u00e9 zlato, pap\u00edr, mosaz, beton a mnoho dal\u0161\u00edch.<\/p>\n\n<\/div>\n<\/div>\n
\n
<\/span>Pro\u010d jsou bronz a nerezov\u00e1 ocel pova\u017eov\u00e1ny za um\u011bl\u00e9 zdroje?<\/span><\/h3>\n\n\n
Proto\u017ee jsou to slitiny vytvo\u0159en\u00e9 z \u010dist\u00fdch p\u0159\u00edrodn\u00edch prvk\u016f.<\/p>\n\n<\/div>\n<\/div>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"
Kdy\u017e se rozhl\u00e9dne\u0161 kolem sebe, v\u0161imne\u0161 si, \u017ee jsi obklopen p\u0159edm\u011bty, budovami, vozidly a mnoha dal\u0161\u00edmi v\u011bcmi. Ale v\u00ed\u0161, z jak\u00fdch materi\u00e1l\u016f jsou vyrobeny? Abychom v\u0161echny tyto p\u0159edm\u011b\u2026<\/p>\n","protected":false},"author":1,"featured_media":32204,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_crdt_document":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[181],"tags":[],"class_list":["post-32439","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sin-categorizar"],"_links":{"self":[{"href":"https:\/\/www.greenuso.com\/blog\/cs\/wp-json\/wp\/v2\/posts\/32439","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.greenuso.com\/blog\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.greenuso.com\/blog\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.greenuso.com\/blog\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.greenuso.com\/blog\/cs\/wp-json\/wp\/v2\/comments?post=32439"}],"version-history":[{"count":2,"href":"https:\/\/www.greenuso.com\/blog\/cs\/wp-json\/wp\/v2\/posts\/32439\/revisions"}],"predecessor-version":[{"id":32504,"href":"https:\/\/www.greenuso.com\/blog\/cs\/wp-json\/wp\/v2\/posts\/32439\/revisions\/32504"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.greenuso.com\/blog\/cs\/wp-json\/wp\/v2\/media\/32204"}],"wp:attachment":[{"href":"https:\/\/www.greenuso.com\/blog\/cs\/wp-json\/wp\/v2\/media?parent=32439"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.greenuso.com\/blog\/cs\/wp-json\/wp\/v2\/categories?post=32439"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.greenuso.com\/blog\/cs\/wp-json\/wp\/v2\/tags?post=32439"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}