CPP、POSF薄膜制備技術(shù)原理與性能.pdf

1、__生$sziktf9%fn.49.三一一一一中文摘要本文以德國(guó)萊芬CPP生戶些，意大利普利泰POSF生產(chǎn)線為基礎(chǔ)，用國(guó)內(nèi)薄膜啥比趾比盛原理進(jìn)行了系統(tǒng)研究。內(nèi)容包括薄耀羹怒彝靄粼箭鬢凳籍黔彝篡籍墓彗霆裹馨篡翼羹徒霎變化等。少要如下:1)對(duì)CPP生產(chǎn)線的理論分析與實(shí)際操作表明，CPP制備是一個(gè)復(fù)雜的系統(tǒng)工程。只有在各部分設(shè)備均處于比較理想的工作狀態(tài)、選擇較佳的設(shè)備操作參數(shù)時(shí)，刁能實(shí)現(xiàn)具有良好外觀CPP膜的制備。三層共擠CPP薄膜橫向性能不

2、均勻主要是由分流塊導(dǎo)致層間分布不均所致。合理配方原料、調(diào)整分流塊至良好工作狀態(tài)，可使薄膜性能橫向均勻。薄膜上縱向白色劃線或規(guī)則的白色條紋，是在氣刀阻塞或壓力不夠、真空吸嘴壓力設(shè)置不合理下產(chǎn)生的。調(diào)節(jié)氣刀、吸嘴的真空度分別為6Mbar和0.3Mbar可消除白色條紋，制備出以EP1X35AFHD642EP1X35AF為基礎(chǔ)配方的65微米CPP薄膜?？刂剖站韽埩?0100N，張力衰減0.030.05%，合理使用抗粘連劑，可避免膜卷靠近紙芯出現(xiàn)

3、硬化粘連層。電暈處理功率越大，薄膜的表面張力越高。對(duì)25“的C尸尸薄膜，其表面張力的值(丫)與電暈處理功率(X)之間有如下關(guān)系:Y=32.12十。.002X。電暈擊穿是造成薄膜定點(diǎn)位置熱封不牢或不能熱封的根本原因。經(jīng)常檢查和調(diào)整電暈處理部分的工作狀態(tài)，可避免上述現(xiàn)象的發(fā)生。2)對(duì)工藝技術(shù)參數(shù)與薄膜性能關(guān)系的研究表明，擠出工藝條件對(duì)薄膜機(jī)械、光學(xué)、表面性能的影響是復(fù)雜的。擠出溫度增加，C尸尸膜的霧度線性遞減，拉伸強(qiáng)度增加，斷裂伸長(zhǎng)率降低，

4、但對(duì)薄膜COF影響不大。流延輥溫度的增加，薄膜拉伸強(qiáng)度增加，薄膜的光學(xué)性能變差，霧度迅速增加。COF斷裂伸長(zhǎng)率降低，光澤度增加，隨流延輥溫度增加降低幅度不人儲(chǔ)存環(huán)境溫度越高，薄膜潤(rùn)濕張力下降的越快，薄膜COF達(dá)到平衡最低點(diǎn)所需RI1G“1越短。3)對(duì)共擠物料流動(dòng)分析和薄膜結(jié)構(gòu)的控制原理的研究表明，三層共擠CP尸薄膜，層間界面平整性取決于相鄰層兩種原料加工時(shí)的粘度。粘度(K)越接近，其界面越平整反之，兩種物料的粘度相差越大，其界面就越不規(guī)

5、則。界面間只止海交通大學(xué)博士后研究報(bào)告ABSTRACTWithRefenhauserCPPline(German)andPolytechPOSFline(Italy)thetechnicalprincipleandpropertyofpolyolefinfilm(CPPandPOSF)usingaseriesofrowmaterialsarestudiedinthepaper.Itdealswithfunctionsofproducti

6、onlinesrelationshipbetweentechnicaldataandcharacteristicsofCPPfilmsanalysisofflowprincipleandstructurecontrolofCPPwiththreelayersmanufacturingofantistaticPOSFanditsprinciplerelationshipbetweencharacteristicchangeanditsho

7、ldingtime.Themainresultwassummarizedasfollows:1)ByanalysisthefunctionofeverypartofCPPlineandcorrelationwithpracticeitisfoundthatthemanufactureofCPPfilmsisacomplexoperationsystem.ThesuitableCPPfilmwithgoodapparentcanonlyb

8、eproducedwheneverypartisatgoodconditionandundersuitableoperationconditionThenonuniformthicknessalongtheTDismainlyascribedtothewrongadjustmentofmultiblockadjacenttothedie.Withbetteradjustingofoperationconditionandmultiblo

9、ckthethicknesscanbeadjustedtomonouniformalongTD.ThewhitestriationorlineregularlyoccurredonCPPfilmalongMDisattributedtolowpressureofairknifeortheblockofairknifeandunreasonabledataofvacuumnozzlesetup.The65IACPPfilmwithgood

10、appearancewithbasiccompositionEP1X35AFHD642EP1X35AFwithoutanywhitestriationlinecanbecarriedoutbyadjustingthepressureofairknifeandvacuumnozzleto6Mbarand0.3Mbar.Bycontrollingofwindertensionwith60100Ntensiondecreasewith0.03

11、0.05%andreasonableusageofantiblockagenttheinvalidhardenlayerswhichmaybeappearedfromthecorecanbeavoided.ThewetsurfacetensionofCPPfilmincreasesasthepowerofconatreatmentincreases.Thecorelationbetweenwetsurfacetension(Y)andp

12、owerofconatreatment(X)for25FCPPfilmisY=32.12十0.002X.Thefilmmaynothavegoodsealpropertiesorevencannotbesealedwitheachotherwhenthelayerisstrokeddownathigherpowerofconatreatment.2)Bystudyofrelationshipbetweencharacteristicso

13、fCPPfilmandcooperationtechnicalconditionitisfoundthattheefectoftechnicaldataofcooperationconditiononpropertiesofCPPfilmiscomplex:Thetensilestrengthincreasesandtheraptureelongationdecreasesasthecoextrusiontemperatureincre