常州防腐蝕PC銷售廠家來電咨詢蘇州晶塑米新材料供應(yīng)-b2b網(wǎng)站_b2b電子商務(wù)平臺(tái)【買產(chǎn)品】-上?？谄蚴称酚邢薰?/title><meta name="description" content="聚碳酸酯的制法之酯交換法：原理與生產(chǎn)滌綸聚酯的酯交換法相似。雙酚A與碳酸二苯酯熔融縮聚，進(jìn)行酯交換，在高溫減壓條件下不斷排除苯酚，提高反應(yīng)程度和分子量。酯交換法需用催化劑，分兩個(gè)階段進(jìn)行：第一階段，溫度180—200℃，壓力270—400P"><meta name="keywords" content="常州防腐蝕PC銷售廠家,PC"><link rel="canonical" href="http://www.cdcfah.com/"/><meta name="applicable-device" content="pc"><link rel="shortcut icon" href="/static/new_net_01/images/favicon.ico"><link rel="stylesheet" href="/static/new_net_01/css/slick.css" /><link rel="stylesheet" href="/static/new_net_01/css/addnew.css"><link rel="stylesheet" href="/static/new_net_01/css/sidenav.css"><link rel="stylesheet" href="/static/new_net_01/css/style.css" /><link rel="stylesheet" href="/static/new_net_01/css/tab.css"><link rel="stylesheet" href="/static/new_net_01/css/404.css"> <meta name="baidu-site-verification" content="OBVzrC9aaQ" /> <meta http-equiv="Cache-Control" content="no-transform" /> <meta 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01:16:16</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="ic95bdf" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">蘇州晶塑米新材料有限公司</a></p><p><span>聯(lián)系人：</span>李麗</p><p><span>郵箱: </span>321260043@qq.com</p><p><span>電話: </span>15162619982</p><p><span>傳真: </span>151_</p><p><span>網(wǎng)址: </span>http://szjingsumi.shop.88360.com</p><p><span>手機(jī): </span>151-62619982</p><p><span>地址: </span>陸家鎮(zhèn)陸豐東路3號(hào)仕泰隆模具城17-8號(hào)</p><p>[當(dāng)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="crbda78" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="ycgx8dt" class="box"><p><p style="text-indent:25px">聚碳酸酯的制法之酯交換法：原理與生產(chǎn)滌綸聚酯的酯交換法相似。雙酚A與碳酸二苯酯熔融縮聚，進(jìn)行酯交換，在高溫減壓條件下不斷排除苯酚，提高反應(yīng)程度和分子量。酯交換法需用催化劑，分兩個(gè)階段進(jìn)行：第一階段，溫度180—200℃，壓力270—400Pa，反應(yīng)1—3h，轉(zhuǎn)化率為80%—90%；第二階段，290—300℃，130Pa以下，加深反應(yīng)程度。起始碳酸二苯酯應(yīng)過量，經(jīng)酯交換反應(yīng)，排出苯酚，由苯酚排出量來調(diào)節(jié)兩基團(tuán)數(shù)比，控制分子量。苯酚沸點(diǎn)高，從高粘熔體中心脫除并不容易。與滌綸聚酯相比，聚碳酸酯的熔體粘度要高得多，例如分子量3萬，300℃時(shí)的粘度達(dá)600Pa·s，常州防腐蝕PC銷售廠家，常州防腐蝕PC銷售廠家，對(duì)反應(yīng)設(shè)備的攪拌混合和傳熱有著更高的要求，常州防腐蝕PC銷售廠家。因此，酯交換法聚碳酸酯的分子量受到了限制，多不超出3萬。聚碳酸酯具有高度透明性及自由染色性。常州防腐蝕PC銷售廠家</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="常州防腐蝕PC銷售廠家,PC" src="https://tyunfile.71360.com/UploadFile/szjingsumi/637399371992464364/7865264.png"></div><p style="text-indent:25px">聚碳酸酯市場與應(yīng)用——光學(xué)透鏡：聚碳酸酯以其獨(dú)特的高透光率、高折射率、高抗沖性、尺寸穩(wěn)定性及易加工成型等特點(diǎn)，在光學(xué)透鏡領(lǐng)域占有極其重要的位置。采用光學(xué)級(jí)聚碳酸酯制作的光學(xué)透鏡不僅可用于制造照相機(jī)、顯微鏡、望遠(yuǎn)鏡及光學(xué)測試儀器等，還可用于制造電影投影機(jī)透鏡、復(fù)印機(jī)透鏡、紅外自動(dòng)調(diào)焦投影儀透鏡、激光束打印機(jī)透鏡，以及各種棱鏡、多面反射鏡等，其應(yīng)用市場極為廣闊。聚碳酸酯在光學(xué)透鏡方面的另一重要應(yīng)用領(lǐng)域便是作為兒童眼鏡、太陽鏡、安全鏡和成人眼鏡的鏡片材料。近年來，世界眼鏡業(yè)聚碳酸酯消費(fèi)量年均增長率一直保持在20%以上，顯示出極大的市場活力。常州防腐蝕PC銷售廠家PC材料具有阻燃性、抗氧化性。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="常州防腐蝕PC銷售廠家,PC" src="https://tyunfile.71360.com/UploadFile/szjingsumi/637399372065580009/1007292.png"></div><p style="text-indent:25px">PC板的生產(chǎn)工藝為擠出成型，所需主要設(shè)備為擠出機(jī)。因?yàn)镻C樹脂的加工比較困難，所以對(duì)生產(chǎn)設(shè)備要求較高。國內(nèi)生產(chǎn)PC板的設(shè)備大多是進(jìn)口的，其中心大部分來自意大利、德國和日本。所用的樹脂大多是從美國的GE公司和德國的Baver公司進(jìn)口的。在擠出之前，物料應(yīng)嚴(yán)格干燥，使其含水量在0.02%(質(zhì)量分?jǐn)?shù))以下。擠出設(shè)備應(yīng)配備真空干燥料斗，有時(shí)需串聯(lián)幾個(gè)。擠出機(jī)的機(jī)身溫度應(yīng)控制在230-350℃，由后向前逐步提高。所用的機(jī)頭為平擠的狹縫式機(jī)頭。擠出后再經(jīng)壓光冷卻。近年來，為滿足PC板抗紫外線性能的要求，常在PC板的表面覆一層含抗紫外線(UV)助劑的薄層，這就需要采用兩層共擠工藝，即表層含有UV助劑而底層不含UV助劑。這兩層在機(jī)頭里復(fù)合，擠出后成為一體。此種機(jī)頭設(shè)計(jì)比較復(fù)雜。有些公司采用了一些新技術(shù)，如Bayer公司采用的是在共擠系統(tǒng)加有特殊設(shè)計(jì)的熔體泵及合流器等技術(shù)。另外有些場合對(duì)PC板有無露滴的要求，所以在另一面應(yīng)有防露滴涂層。還有的PC板需兩面皆有抗紫外線層，此種PC板生產(chǎn)工藝更為復(fù)雜。</p><p style="text-indent:25px">制品成型方法：聚碳酸酯在成型制品前，應(yīng)先將原料在120～130℃的熱風(fēng)循環(huán)烘箱中心干燥處理10h左右，使原料的含水量小于0.03%。干燥處理后的原料，可采用擠出、注塑、吹塑和真空成型等方法。成型塑料各種板、管、容器和薄膜等制品。聚碳酸酯成型加工時(shí)，機(jī)筒的加料段溫度在230℃左右，塑化段溫度在250℃左右，均化段溫度在270℃左右，注射壓力在40～120MPa范圍內(nèi)，模具溫度在100℃左右。為了消除制件的內(nèi)應(yīng)力，制品成型后要在120℃左右的溫度中心進(jìn)行熱處理?？刹捎糜驮》?，也可在烘箱中心進(jìn)行熱處理。采用光學(xué)級(jí)聚碳酸配制作的光學(xué)透鏡不僅可用于照相機(jī)、顯微鏡、望遠(yuǎn)鏡及光學(xué)測試儀器等。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="常州防腐蝕PC銷售廠家,PC" src="https://tyunfile.71360.com/UploadFile/szjingsumi/637399372018831779/5088680.png"></div><p style="text-indent:25px">聚碳酸酯是一種強(qiáng)韌的熱塑性樹脂bai，其名稱來源于其內(nèi)部的CO3基團(tuán)。可由雙酚A和氧氯化碳（COCl2）合成?，F(xiàn)較多使用的方法為熔融酯交換法（雙酚A和碳酸二苯酯通過酯交換和縮聚反應(yīng)合成）。聚碳酸酯是一種線型碳酸聚酯，分子中心碳酸基團(tuán)與另一些基團(tuán)交替排列，這些基團(tuán)可以是芳香族，可以是脂肪族，也可兩者皆有。雙酚A型PC是較重要的工業(yè)產(chǎn)品。聚碳酸酯高分子量樹脂有很高的韌性，懸臂梁缺口沖擊強(qiáng)度為600~900J/m，未填充牌號(hào)的熱變形溫度大約為130°C ，玻璃纖維增強(qiáng)后可使這個(gè)數(shù)值增加10°C。低于100°C 時(shí)，在負(fù)載下的蠕變率很低。PC耐水解性差，不能用于重復(fù)經(jīng)受高壓蒸汽的制品。PC是幾乎無色的玻璃態(tài)的無定形聚合物，有很好的光學(xué)性。常州防腐蝕PC銷售廠家</p><p style="text-indent:25px">聚碳酸酯熱變形溫度：135°C 低溫-45°C。常州防腐蝕PC銷售廠家</p><p style="text-indent:25px">pc加工注意事項(xiàng)1、注射溫度視原料的分子量、制品的形狀和尺寸、注塑機(jī)的類型而相應(yīng)調(diào)整。2、注射速度較好采取多級(jí)注射，采用慢-快-慢的方法。3、注射壓力視制品的形狀和尺寸而定，柱塞式注塑機(jī)一般為100—160MPa，螺桿式注塑機(jī)為70—140MPa。4、成型周期視制品壁厚和注射量而定，一般情況下充模時(shí)間較短，保壓時(shí)間較長，冷卻時(shí)間以脫模時(shí)不引起制品變形為原則。5、模具溫度視制品的形狀、厚薄而定，適當(dāng)提高模具溫度有利于脫模，提高產(chǎn)品質(zhì)量。6、制品后處理：對(duì)于形狀復(fù)雜、帶有金屬嵌件、使用溫度極低或很高的制品有必要進(jìn)行后處理——消除或減少內(nèi)應(yīng)力。方法：制品置于烘干箱后開始升溫，由室溫升至100—105時(shí)保溫10—20min，繼續(xù)升溫至120—125時(shí)保溫30—40min，然后緩慢冷卻至60以下取出。常州防腐蝕PC銷售廠家</p><p style="text-indent:25px">蘇州晶塑米新材料有限公司總部位于陸家鎮(zhèn)陸豐東路3號(hào)仕泰隆模具城17-8號(hào)，是一家經(jīng)營范圍如下：通用塑膠原料：ABS、PMMA、SAN（AS）、PP等。工程塑膠原料：PC、PC/ABS、PPO、PPE、POM、PA6、PA66、PA46、PA9T、PA6T、PA12、PA11、PBT、PET、ASA等。特種工程塑膠原料：PPS、LCP、PEI、PPA等。熱塑性彈性體：TPU、K膠、EVA、POE；TPR、TPE、SBS、SEBS、TPEE、TPV適用于運(yùn)動(dòng)器材、玩具、手柄、汽車方向盤、電動(dòng)工具握把、箱包、日用工具手把、牙刷、密封圈等行業(yè)。的公司。公司自創(chuàng)立以來，投身于PA66，PC，POM，PLA，是橡塑的主力軍。蘇州晶塑米致力于把技術(shù)上的創(chuàng)新展現(xiàn)成對(duì)用戶產(chǎn)品上的貼心，為用戶帶來良好體驗(yàn)。蘇州晶塑米始終關(guān)注橡塑市場，以敏銳的市場洞察力，實(shí)現(xiàn)與客戶的成長共贏。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/3054965.html</p></div></div></div></div></div><div id="3aczdpw" class="page-right twoColRt"><div id="rblxprd" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="dn7r3ov" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" alt="福建ZF配件哪家強(qiáng) 信息推薦自業(yè)物資供應(yīng)" 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