I-HPMC yefilimu

I-HPMC yeIfilimu ekhathalelo yindlela yokwenza ubuchwephesha befilimu ye-polymer malunga nolungiselelo olomeleleyo. Umzekelo, umaleko wezinto ezizinzileyo ze-polymer tshizwa ngokungafaniyo kumphezulu wephepha elibhalwe ngendlela yokwenza ipilisi yefilimu yokufumana i-microns ye-microns ezininzi, ukuze kufezekiswe isiphumo esifunayo. Ukwenziwa kwalo mboniso bhanyabhanya ngaphandle kwethebhulethi kukuba ithebhulethi enye inamathela kwizinto zokuthambisa i-polymer emva kokuphumelela kwindawo yokutshiza, emva koko ifumane indawo elandelayo yokumisa. Emva kokuphindaphinda kunye nokomisa, ukungqengqeleka kugqityiwe de wonke umphezulu wamalungiselelo agutyungelwe ngokupheleleyo. Ifilimu yokudibana yifilimu eqhubekayo, ubukhulu ubukhulu becala phakathi kwe-8 ukuya kwi-100 microns, inqanaba elithile lokuqina kunye nokuguquguquka, kunamathela ngokuqinileyo kumphezulu we-core.

Ngo-1954, i-Abbott ivelise i-batch yokuqala yeefilimu, ukusukela ngoko, ngokuphuhliswa kokuqhubeka nokugqibelela kwemveliso kunye netekhnoloji yefilimu, ukuze itekisi yefilimu ikhutshiwe ngokukhawuleza. Ayisiyo nje kuphela iintlobo, ubungakanani kunye nomgangatho weearhente zokuthambisa zombala ziye zanda ngokukhawuleza, kodwa neentlobo, iifom kunye neempawu zetekhnoloji yokuthobela, izixhobo zokuhamba kunye nokudibana kweepilisi ze-TCM ziye zaphuhliswa kakhulu. Ke ngoko, ukusetyenziswa kwetekhnoloji yokuthobela ifilimu kuye kwayimfuneko kunye nenqanaba lophuhliso lwamashishini amayeza ukuphucula umgangatho wemveliso.

Ukusetyenziswa kwangoko kwifilimu ekhathaza ifilimu yefilimu, kusekho inani elikhulu leemveliso ezisebenzisa i-HPMChydroxypropyl methylcelceluplosenjengezixhobo ze-membrane. KukuhlanjululwaI-HPMCI-selsulose evela kwi-Cotton Lint okanye i-Pulp yeWoods, kunye neSodium hydroxide ukubonisa ukungcungcutheka kwe-alkali selsulose, emva koko nge-chloromethane kunye ne-proplenene kunye ne-proplenene oxide i-methyl hydroxropproploseI-HPMC, imveliso yokususa ukungcola emva komomo, ukutyhoboza, ukupakisha. Ngokubanzi, i-viscofity ephantsi ye-HPMC isetyenziswa njengeifilimuImpahla yokuhamba, kunye ne-2% ~ 10% i-10% isetyenziswa njengesisombululo sokuqaqamba. Ingxaki kukuba i-vickosity inkulu kakhulu kwaye ukwanda kunamandla kakhulu.

Isiphelo sesibini sezinto zokwenza ifilimu yi-Polyvinyl utywala (PVA). I-Polyvinyl Utywala buyenziwa nge-fallyviny ye-polyvinyl. I-vinyl yotywala iphinda isetyenziswe njenge-reasparies kuba azifezekisi ubungakanani kunye nokucoceka okufunekayo kwi-polymerization. E-methanol, ethanol okanye e-ethanol kunye ne-methyl acetate enesisombululo esixubileyo ne-alkali i-acid njengekatalyst, i-hydrolysis ikhawulezayo.

IPDA isetyenziswa ngokubanzi kwifilimu. Kuba i-inflined emanzini kubushushu begumbi, idityaniswa ngokubanzi malunga ne-20% yokusasazeka kwamanzi. I-vapor ye-vapor kunye neoksijini ye-PE iphantsi kwe-HPMC kunye ne-EC, ke amandla okuqhekeza amanzi kunye neoksijini yomelele, nto leyo enokuthi ikhusele ngakumbi i-chip core.

Umbhalo weplastikhi ubhekisa kwinto enokonyusa iplastiki yezixhobo zokwenza ifilimu. Ezinye izinto zokwenza ifilimu zitshintsha iipropathi zazo zomzimba emva kokuba amaqondo obushushu ancitshisiwe, kwaye ukushukumiseka kwee-macromoleules zabo kuya kuncipha, kokwenza ukuba i-bied bast, kwaye kungekho mthethweni, kwaye kulula ukwaphula. I-plasticizer yongezwa ukunciphisa ubushushu beTrans yeGrakhi Iiplasitiki ezisetyenzisiweyo zisetyenziswayo zi-amorphous polymers ezinobunzima obukhulu bemolekyuli kunye nobumbano obuqinileyo nezixhobo zokwenza ifilimu. Umphathi weplastiki engenamali unceda ukunciphisa ukutshintsha kwengqumbo, oko ke kukhulisa uzinzo lwamalungiselelo.

Kuyakholelwa ngokubanzi ukuba indlela yeplastiki yile molekyuli yeplastiki ifakwe kwi-Polymer Chain, ebhloka intsebenzo phakathi kweemolekyuli zePolymer ukuya kumda omkhulu. Unxibelelwano lulula xa unxibelelwano lwe-polymer-playmer lunamandla kunonxibelelwano lweplasitifane. Ke, amathuba amacandelo ePolymer ukuba ahambe anyuswe.

Isizukulwana sesithathu sezixhobo zokwenza ifilimu sisiphatho sendlela yeFmikhali

Umzekelo, i-Inco ye-Inconc yeFiziCoat® IR I-IR i-IR ye-Basf yile nto ifakwe i-scren kwi-chanmer ye-pva polymer ye-PAke Polymer ngaphandle kongeza ichibi