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class="content"><p><span>需求數量：</span>0</p><p><span>價格要求：</span>面議</p><p><span>所在地：</span>上海市</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產品關鍵詞：</span>上海導電碳黑貨源充足,碳黑</p><p><span>***更新：</span>2020-07-15 15:24:32</p><p><span id="click" >瀏覽次數：0次</span></p><a rel="nofollow" class="button">聯系我們</a></div></div><div id="8isw2ya" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">上海立升實業(yè)有限公司</a></p><p><span>聯系人：</span>程先生</p><p><span>郵箱: </span>359128112@qq.com</p><p><span>電話: </span>15800327189</p><p><span>傳真: </span>021_34090395</p><p><span>網址: </span></p><p><span>手機: </span>021-31001391</p><p><span>地址: </span>上海閔行區(qū)瓶安路1358號</p><p>[當前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="ml8hjgy" class="page-proshow02"><p class="title">詳細說明</p><div id="lvspjvh" class="box"><p><p> 二、紫外線防護性的應用 </p> <p> 炭黑在塑料工業(yè)中用途之一是防紫外光老化，由于炭黑有較高的吸光性，因而能有效的防止塑料受陽光照射而產生光氧化降解。炭黑作為紫外光穩(wěn)定劑在塑料中所起的作用有：把光能轉化為熱能；保護塑料表面而免遭一定波長的射線照射；截取原子團而產生防老化作用，從而阻止催化降解。紫外線對聚烯烴特別有害，試驗證明當一定細度的炭黑的濃度為百分之二時可以達到完美的紫外線屏蔽作用。 </p> <p> 炭黑對塑料的紫外線老化的防護作用，取決于炭黑的粒徑、結構和表面化學性。 </p> <p> 炭黑的粒徑較小時，因表面積增大，其吸收光或遮光能力增加，故紫外線防護作用增強，但粒徑小于20nm，其防護作用趨于同一水平，上海導電碳黑貨源充足，原因是當粒徑過小時，逆向散射減小，而繼續(xù)向前的光會威脅聚合物的穩(wěn)定性。 </p> <p> 結構較低，即聚集體尺寸較小時，因聚集體幾何體積較小，上海導電碳黑貨源充足，上海導電碳黑貨源充足，會增強對聚合物的防護作用，這也是結構較低的炭黑較黑的原因。 </p> <p> 炭黑表面含氧基團較多，即揮發(fā)份較高時，能消除聚合物分解時產生的基因，因此防護作用也增強。世界橡膠工業(yè)原材料耗用量排在***位的是生膠，第二位的是炭黑。上海導電碳黑貨源充足</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海導電碳黑貨源充足,碳黑" src="http://tyunfile.71360.com/UpLoadFile/shhlssy/2019/8/637007714689791729/6370077146897917295677514.jpg"></div><p> 分散的目的是使色素炭黑的內部結構分布均勻，分散效果直接影響到色素炭黑的特性，還有制品的色相、黑度和遮蓋力等。色素炭黑分散不好會導致下面的狀況。 </p> <p> <br /> </p> <p> <br /> </p> <p> 1、顏色強度不穩(wěn)定，黑度展現力度不夠，并且外觀色澤不好。 </p> <p> <br /> </p> <p> 2、色素炭黑內部分布不均勻，出現條紋。 </p> <p> <br /> </p> <p> 3、在生產油墨過程中，色素炭黑分散不好直接會導致后期印刷質量差。 </p> <p> <br /> </p> <p> 4、擠出機的過濾篩網被堵塞，在擠出加工吹朔薄膜時，未破碎的炭黑附聚物引起膜泡撕裂。 </p> <p> <br /> </p> <p> 5、引起單絲和扁絲斷裂，制品機械強度降低。 </p> <p> <br /> </p> <p> 同時要注意的是色素碳黑被研磨分散時，粒子細度應不大于15um。在有些涂料中，甚至要求低于5um。上海**碳黑詢問報價1821 年人們在北美地區(qū)***用天然氣為原料生產炭黑。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海導電碳黑貨源充足,碳黑" src="http://tyunfile.71360.com/UpLoadFile/shhlssy/2019/8/637007714520259984/6370077145202599841485506.jpg"></div><p> 碳黑技術工藝（生產方法） </p> <p> 全球碳黑生產工藝一般為爐法、接觸法（主要為槽法和無槽氣法）和熱解法。我們正在使用的是**重要也是**常用的生產工藝--爐法和氣法。 </p> <p> 所謂爐法就是在密閉的反應爐中，將液烴原料（一般是煤焦油）噴射到燃燒的熱空氣和天然氣中，在高溫下經熱氧化而分解，所生成碳黑的性能可以通過猝熄火焰來控制。然后，使用過濾系統把產成的顏料碳黑從氣煙中分離出來。爐法的特點是原材料的選擇范圍很廣，且生產出的碳黑的性能多種多樣。 </p> <p> 而氣法即無槽氣法，是從槽法改進而來的生產工藝。槽法是將固態(tài)烴（粗蒽）或液態(tài)烴（蒽油）經氣化釜氣化后，和可燃性氣體（一般使用天然氣，也使用焦爐煤氣或水煤氣）混合后作為原料，由環(huán)形布置的管網送入火房在槽鋼下的火嘴中高溫燃燒并經槽鋼冷卻面收集生成碳黑的工藝。無槽氣法即火房不設槽鋼冷卻面的改進工藝。這種工藝生產出來的顏料碳黑收率較爐法偏低，但原生粒子粒徑小，在黑度和著色力方面均有更好的表現。 </p><p style="text-indent:25px">著色用炭黑色素炭黑一般都能較好的給塑料著色，可根據著色特性或物化性能選用色素炭黑，著色用炭黑的品種的選擇基本上都是隨成品必須達到的黑度而定。用極細的色素炭黑可以完成黑度要求特別高的著色； PE垃圾袋，塑料袋，電纜材料之類產品只需中等水平黑度，可以用比表面積較低，結構較高的炭黑品種；塑料調色時，炭黑稱量和配料時出現的微小誤差，均會導致明顯的色差，因此，宜采用粒徑較大，著色力較差的低色素炭黑，這樣炭黑用量可以稍大，稱量誤差相對小些，并有分散性較好、價格較低的優(yōu)點。炭黑是烴類經氣相不完全燃燒或熱裂解而成的黑色粉末狀物質。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海導電碳黑貨源充足,碳黑" src="http://tyunfile.71360.com/UpLoadFile/2019/8/8/21/637008955391718328_shhlssy_5816977.jpg"></div><p style="text-indent:25px">光穩(wěn)定性光會使塑料老化，尤其是陽光中的紫外線會加速塑料的老化。在配合運用有機紫外光吸收劑和抗氧化劑可使壽命延長。然而顏料黑仍然被認為是比較好的紫外線穩(wěn)定劑。顏料黑作為紫外光吸收劑，主要用作延長塑料制品在戶外使用壽命。濃度為0.5%的小粒徑炭黑（20 nm）與2%的相對粗粒徑的炭黑（95 nm）差不多具有同樣的光保護作用。食品接觸所有涉及到食品衛(wèi)生法規(guī)定的日用品的著色顏料，包括顏料必須符合規(guī)定的純凈標準。首先，這些標準規(guī)定了一般顏料它的重金屬的含量，其組分在0.1N鹽酸中的溶解度（和胃液的酸度一樣），以及規(guī)定芳香氨的含量。而后，特別制定了關于炭黑的純凈標準，而這一標準因國家而不同。常用吸油值表示結構性，吸油值越大，炭黑結構性越高，容易形成空間網絡通道，而且不易破壞。上海導電碳黑貨源充足</p><p style="text-indent:25px">據分析，可在炭黑表面檢測如酚基、醌基、羧基等基團，這些酸性基團濃度在氣黑和氧化爐黑的表面特別高。上海導電碳黑貨源充足</p><p style="text-indent:25px">炭黑的結構性是以炭黑粒子間聚成鏈狀或葡萄狀的程度來表示的。由凝聚體的尺寸、形態(tài)和每一凝聚體中的粒子數量構成的凝聚體組成的炭黑稱為高結構炭黑。常用吸油值表示結構性，吸油值越大，炭黑結構性越高，容易形成空間網絡通道，而且不易破壞。高結構炭黑顆粒細，網狀鏈堆積緊密，比表面積大，單位質量顆粒多，有利于在聚合物中形成鏈式導電結構，其中在眾多炭黑品種中以乙炔炭黑為比較好。粒徑分布寬的炭黑粒子比分布窄的炭黑粒子更能賦予聚合物導電性，并用統計方法解釋這個現象。粒徑分布寬的炭黑，少數大直徑粒子需要數目巨大，直徑更小的粒子給予補償，相同平均粒徑分布寬的炭黑比分布窄的炭黑有更多的粒子總數。上海導電碳黑貨源充足</p><p style="text-indent:25px">上海立升實業(yè)有限公司致力于化工，以科技創(chuàng)新實現***管理的追求。上海立升實業(yè)有限深耕行業(yè)多年，始終以客戶的需求為向導，為客戶提供***的[ "炭黑", "白炭黑", "蠟粉", "分散劑" ]。公司堅持以技術創(chuàng)新為發(fā)展引擎，以客戶滿意為動力，目前擁有11~50人專業(yè)人員，年營業(yè)額達到2000-3000萬元。上海立升實業(yè)有限始終關注化工行業(yè)。海納百川，有容乃大，國內外同行的智慧都是促使我們前行的力量。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/603951.html</p></div></div></div></div></div><div id="ueb2ne3" class="page-right twoColRt"><div id="qpw3m8i" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="rgis3pb" class="recomPic likePro"><a 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