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href="http://www.cdcfah.com/cp/third-quan_djjq/">多聚甲醛</a>?韓國科隆POMGF703 真誠推薦蘇州晶塑米新材料供應(yīng)</p><div id="0cqagsc" class="leftbox clearfix"><h1>韓國科隆POMGF703 真誠推薦蘇州晶塑米新材料供應(yīng)</h1><div id="c2g8skc" class="proBig"><div id="ks286oi" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/szjingsumi/637387288163318668/8954645.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="w4ocqw0" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/szjingsumi/637387288163318668/8954645.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="kqg0e4y" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</span>面議</p><p><span>所在地：</span>江蘇省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>韓國科隆POMGF703,POM</p><p><span>***更新：</span>2021-01-31 07:18:27</p><p><span id="click" >瀏覽次數(shù)：3次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="qaaoky2" 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: </span>151-62619982</p><p><span>地址: </span>陸家鎮(zhèn)陸豐東路3號仕泰隆模具城17-8號</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="ewkgmgg" class="page-proshow02"><p class="title">詳細說明</p><div id="0yeek20" class="box"><p><p style="text-indent:25px">導(dǎo)電改性：添加導(dǎo)電性炭黑是制造導(dǎo)電性POM的常用方法，所謂導(dǎo)電性炭黑是指粒徑較小、表面積較大且鎖狀構(gòu)造較多的一類炭黑。炭黑一般是有各種有機烴類以不完全燃燒的方法或熱分解的方法制成的，為不溶不熔的微球狀粒子，其表面除孤對電子和芳香環(huán)外，還有醌式羰基及酚式羥基等極性官能團。導(dǎo)電性炭黑的添加量一般為0.5%-20%，若炭黑的導(dǎo)電性較好，則POM的表面電阻率或體積電阻率均可降低至1*102數(shù)量等級。但由于炭黑表面上級性官能團的作用，韓國科隆POMGF703，往往會造成POM熱穩(wěn)定性下降，進而造成物理力學(xué)性能的降低。為克服此缺點，可采取導(dǎo)電性炭黑和親水性高分子化合物（如PEG）并用的方法，以減少炭黑的使用量，也可以采用添加以甲醛捕捉劑為主的熱穩(wěn)定劑方法，改進體系熱穩(wěn)定性。與之相比，韓國科隆POMGF703，碳纖維的使用既能使POM的各種性能（包括自潤滑性）有較大的提高，又可達到良好的抗靜電性。如添加20%導(dǎo)電性較好的碳纖維時，韓國科隆POMGF703，POM的表面電阻率和體積電阻率均可達到1*102數(shù)量級。聚甲醛在聚甲醛中加入抗氧劑及光穩(wěn)定劑可以提高聚甲醛的耐候性。韓國科隆POMGF703</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="韓國科隆POMGF703,POM" src="https://tyunfile.71360.com/UploadFile/szjingsumi/637387288163318668/8954645.png"></div><p style="text-indent:25px">特點：POM為乳白色不透明結(jié)晶性線性熱塑性樹脂，具有良好的綜合性能和著色性，具有較高的彈性模量，很高的剛性和硬度，比強度和比剛性接近于金屬；拉伸強度，彎曲強度，耐蠕變性和耐疲勞性優(yōu)異，耐反復(fù)沖擊，去載回復(fù)性優(yōu)；摩擦系數(shù)小，耐磨耗，尺寸穩(wěn)定性好，表面光澤好，有較高的粘彈性，電絕緣性優(yōu)，且不受溫度影響；耐絕緣性好且不受濕度影響；耐化學(xué)藥品性優(yōu)：除了強酸、酚類和有機鹵化物外，對其他化學(xué)品穩(wěn)定，耐油；機械性能受溫度影響小，具有較高的熱變形溫度。缺點是阻燃性較差，遇火徐徐燃燒，氧指數(shù)小，即使添加阻燃劑也得不到滿意的要求，另外耐候性不理想，室外應(yīng)用要添加穩(wěn)定劑。無錫食品級POM公司聚甲醛容易溶于有機溶劑，它能耐稀酸，但不能耐強酸。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="韓國科隆POMGF703,POM" src="https://tyunfile.71360.com/UploadFile/szjingsumi/637387288066131190/4300719.png"></div><p style="text-indent:25px">國內(nèi)聚甲醛的生產(chǎn)現(xiàn)狀：我國內(nèi)地目前能夠掌握POM生產(chǎn)技術(shù)，正式生產(chǎn)POM的企業(yè)并不多，產(chǎn)品規(guī)模小，其中云天化只能生產(chǎn)幾個牌號的產(chǎn)品，上海藍星也只有10余個牌號，而國際主要跨國公司都有30～40個牌號可以選擇。因此，無論從生產(chǎn)規(guī)模還是品種看，國內(nèi)POM生產(chǎn)技術(shù)都還處于相對落后的狀態(tài)，工藝技術(shù)尚存在一些缺陷，原材料及公用工程消耗較高，產(chǎn)品質(zhì)量不夠穩(wěn)定，再加上國外產(chǎn)品傾銷的市場價格競爭，各廠生產(chǎn)的POM遠遠不能滿足國內(nèi)需求，以及抵御國外產(chǎn)品大規(guī)模的沖擊。</p><p style="text-indent:25px">聚甲醛(POM)注塑工藝要點：1.干燥處理： POM吸水性小，一般為0.2%-0.5%。在通常情況下，POM不需干燥就能加工，但對潮濕原料必須進行干燥。干燥溫度80℃以上，時間2小時以上，具體應(yīng)按供應(yīng)商資料進行。 2.回用料：再生料使用比例一般不超過20-30%。但要視產(chǎn)品的種類和zui終用途而定，有時可達99%。 3.塑機的選用： POM是結(jié)晶料，zui好用結(jié)晶料專業(yè)螺桿或尼龍PA螺桿，但POM的加工范圍寬泛，用一般注塑機也可以。 4.模具及澆口設(shè)計：常見模具溫度控制為80-90℃，流道直徑有3-6mm，澆口長度為0.5mm，澆口大小要視膠壁厚度而定，圓形澆口直徑至少應(yīng)制品厚度的0.5-0.6倍，長方形澆口的寬度通常是厚度的2倍或以上，深度為壁厚的0.6倍，脫模斜度40′-1°30′之間。聚甲醛有較高的粘彈性，電絕緣性優(yōu)，且不受溫度影響；耐絕緣性好且不受濕度影響。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="韓國科隆POMGF703,POM" src="https://tyunfile.71360.com/UploadFile/szjingsumi/637387288040623353/6169138.png"></div><p style="text-indent:25px">聚甲醛注射過程中應(yīng)注意哪些事項：物料過熱（超過240℃)或受熱時間過長，容易分解,產(chǎn)生相當(dāng)量的甲醛。部分甲醛將進而氧化成甲酸，并引起大量甲醛氣體的產(chǎn)生，嗆人、流淚、咳嗽，甚至可能引起傷人。操作上應(yīng)切實予以注意： (1) 盡量采用低的料筒溫度和噴嘴溫度； (2) 先將料筒溫度升至150℃ ,等15min后再升至正常加工溫度； (3) 發(fā)現(xiàn)分解的預(yù)兆后，馬上對空注出巳分解的物料，分析原因，采取措施； (4) 停車前15min,停止料筒加熱，注出料筒內(nèi)的物料。料筒內(nèi)應(yīng)不留大量剩料； (5) 其他原料更換為聚甲醛時，除了加工溫度比聚甲醛低的物料或者與聚甲醛相近的物料，必須用聚乙烯清洗過渡； (6) 要經(jīng)常檢查溫度控制系統(tǒng)及各部的溫度。物料分解是有預(yù)兆的： ① 有強烈的甲醛剌激性氣味； ② 熔體有棕黃色條紋或制品有毛斑； ③ 熔體氣泡，并有"嘶嘶"聲而且冒煙。聚甲醛添加PTFE、PE、UHMWPE 等自身摩擦系數(shù)較低的結(jié)晶性高分子材料。無錫食品級POM公司</p><p style="text-indent:25px">聚甲醛盡量采用低的料筒溫度和噴嘴溫度。韓國科隆POMGF703</p><p style="text-indent:25px">特點：均聚甲醛結(jié)晶度高，機械強度、剛性、熱變形溫度等比共聚甲醛好，共聚甲醛熔點低，熱穩(wěn)定性，耐化學(xué)腐蝕性，流動特性，加工性均優(yōu)于均聚甲醛，新開發(fā)的產(chǎn)品為超高流動（快速成型），耐沖擊和降低模具沉積牌號，也有無機填充，增強牌號。POM吸水率大于0.2%，成型前應(yīng)預(yù)干燥，POM熔融溫度與分解溫度相近，成型性較差，可進行注塑、擠出、吹塑、滾塑、焊接、粘接、涂膜、印刷、電鍍、機加工、注塑是zui重要的加工方法，成型收縮率大，模具溫度宜高些，或進行退火處理，或加入增強材料（如無堿玻璃纖維）。韓國科隆POMGF703</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/3092707.html</p></div></div></div></div></div><div id="0u2wqei" class="page-right twoColRt"><div id="8cou4ya" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="4q68c2w" 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配件哪家強信息推薦自業(yè)物資供應(yīng)" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></div><p>福建ZF配件哪家強信息推薦自業(yè)物資供應(yīng)</p></a></div><div id="ueeaig4" class="recomPic likePro"><a 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