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1.0الخليج للسياراتhttps://www.gulf4cars.comماسبب احتفاظ إطارات السيارات باللون الأسود - الخليج للسياراتrich600338<blockquote class="wp-embedded-content"><a href="https://www.gulf4cars.com/2018/08/25/%d9%85%d8%a7%d8%b3%d8%a8%d8%a8-%d8%a7%d8%ad%d8%aa%d9%81%d8%a7%d8%b8-%d8%a5%d8%b7%d8%a7%d8%b1%d8%a7%d8%aa-%d8%a7%d9%84%d8%b3%d9%8a%d8%a7%d8%b1%d8%a7%d8%aa-%d8%a8%d8%a7%d9%84%d9%84%d9%88%d9%86-%d8%a7/">ماسبب احتفاظ إطارات السيارات باللون الأسود</a></blockquote> <script type='text/javascript'> <!--//--><![CDATA[//><!-- /*! This file is auto-generated */ !function(d,l){"use strict";var e=!1,n=!1;if(l.querySelector)if(d.addEventListener)e=!0;if(d.wp=d.wp||{},!d.wp.receiveEmbedMessage)if(d.wp.receiveEmbedMessage=function(e){var t=e.data;if(t)if(t.secret||t.message||t.value)if(!/[^a-zA-Z0-9]/.test(t.secret)){for(var r,i,a,s=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),n=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),o=new RegExp("^https?:$","i"),c=0;c<n.length;c++)n[c].style.display="none";for(c=0;c<s.length;c++)if(r=s[c],e.source===r.contentWindow){if(r.removeAttribute("style"),"height"===t.message){if(1e3<(a=parseInt(t.value,10)))a=1e3;else if(~~a<200)a=200;r.height=a}if("link"===t.message)if(i=l.createElement("a"),a=l.createElement("a"),i.href=r.getAttribute("src"),a.href=t.value,o.test(a.protocol))if(a.host===i.host)if(l.activeElement===r)d.top.location.href=t.value}}},e)d.addEventListener("message",d.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",t,!1),d.addEventListener("load",t,!1);function t(){if(!n){n=!0;for(var e,t,r=-1!==navigator.appVersion.indexOf("MSIE 10"),i=!!navigator.userAgent.match(/Trident.*rv:11\./),a=l.querySelectorAll("iframe.wp-embedded-content"),s=0;s<a.length;s++){if(!(e=a[s]).getAttribute("data-secret"))t=Math.random().toString(36).substr(2,10),e.src+="#?secret="+t,e.setAttribute("data-secret",t);if(r||i)(t=e.cloneNode(!0)).removeAttribute("security"),e.parentNode.replaceChild(t,e)}}}}(window,document); //--><!]]> </script><iframe sandbox="allow-scripts" security="restricted" src="https://www.gulf4cars.com/2018/08/25/%d9%85%d8%a7%d8%b3%d8%a8%d8%a8-%d8%a7%d8%ad%d8%aa%d9%81%d8%a7%d8%b8-%d8%a5%d8%b7%d8%a7%d8%b1%d8%a7%d8%aa-%d8%a7%d9%84%d8%b3%d9%8a%d8%a7%d8%b1%d8%a7%d8%aa-%d8%a8%d8%a7%d9%84%d9%84%d9%88%d9%86-%d8%a7/embed/" width="600" height="338" title="“ماسبب احتفاظ إطارات السيارات باللون الأسود” — الخليج للسيارات" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe>https://www.gulf4cars.com/wp-content/uploads/2018/08/ماسبب-احتفاظ-إطارات-السيارات-باللون-الأسود.jpg750350يتساءل كثيرون: لماذا لون إطارات السيارات دائما أسود لم يتغير على مر العصور؟ والجواب أن إطارات السيارات تكون دائما باللون الأسود بسبب إضافة مادة (الكربون) ذات اللون الأسود في تصنيع الإطارات لحمايتها من أضرار الأشعة فوق البنفسجية التي تسبب جفاف الإطار وتشققه. ويعد المطاط الطبيعي أو الصناعي المادة الأساسية في صناعة إطارات السيارات، وتتمتع هذه …