1. Tsanangudzo uye basa re thickener
Kuwedzera izvo zvinogona kuwedzera zvakanyanya zvevisiko zvemvura-yakavakirwa mvura pendi inonzi tickeners.
Thizipers anotamba basa rakakosha mukugadzirwa, kuchengetwa uye kuvaka kwemakonzo.
Basa guru reiyo thickener nderokuwedzera iyo visikoka yekuvhara kuti isangane nezvinodiwa zvematanho akasiyana ekushandiswa. Nekudaro, visikoity inodiwa nekubatanidza pamatanho akasiyana akasiyana. Eg:
Munguva yekuchengetedza, inodikanwa kuve neiyo yepamusoro yevaisikoka kudzivirira iyo pigment kubva pakugadziriswa;
Munguva yekuvaka, inodikanwa kuve neyekuvona zvine mwero kuti ive nechokwadi chekuti pendi ine musango wakanaka pasina kunyanyisa kupenda pendi;
Mushure mekuvaka, inotarisirwa kuti viscosity inogona kukurumidza kudzokera kune yakakwira viscosity mushure menguva pfupi lag (yekufambisa maitiro) kudzivirira kusimuka.
Iyo fluidity yejasi remvura isiri-Newtonian.
Kana viscosity ye pendi ichiderera nekuwedzera kwesimba raSearar, inonzi pseudoplastic fluid, uye yakawanda yependi ndeye pseudoplastic fluid.
Kana maitiro ekuyerera eiyo pseudoplastic fluid ine hukama nenhoroondo yayo, kureva kuti, inguva inoenderana, inonzi iyo thisiotropic fluid.
Patinogadzira machira, kazhinji tinoedza kuita kuti zvibike thisk, sekuwedzera zvinowedzera.
Kana iyo thiskotropy yekuvhara yakakodzera, inogona kugadzirisa zvinopesana nezvikwangwani zvakasiyana-siyana zvekuvhara, uye kuzosangana nezvinodiwa zvehunyanzvi zvezvisikwa zvevakarondedzera mukuchengetedza, uye kuomesa matanho.
Dzimwe nhaurwa dzinogona kupinza pendi neiyo yepamusoro thépy, kuitira kuti ine yakakwira viscosity pazororo kana pane yakaderera shear rate (sekutakura), kuitira kuti udzivirire pendi kubva pakugadziriswa. Uye pasi pehombe shear rate (senge coating maitiro), ine yakaderera viscosity, kuitira kuti coating ine kuyerera kwakakwana uye kuwanda.
Thiskotropy inomiririrwa neTHXotropic Index ti uye yakayerwa neBrookfield Viscometer.
Ti = viscosity (kuyerwa pa6r / min) / viscosity (kuyerwa pa60r / min)
2. Mhando dze thickeners uye yavo mhedzisiro paCoating Properties
.
Mhando yeAmerics inosanganisira Bentonite, Attapulgite, Aluminium Magnesium Silther, Etdroxslate, Polymethacryl Cellalose, Acrylic Acrylic HeMolymymer kana Copymer And Polyurethane etc.
Kubva pamaonero esimba pane zvimiro zvezvinyorwa zvejasi, matairi akakamurwa kuita thixotropic thickeners uye manhamba asonganidzirane. Panyaya yekuita zvinodiwa pakuita, huwandu hwehukadzi hunofanirwa kunge hwakaderera uye hwakakora hwakanakisa; Hazvisi nyore kubviswa nema enzymes; Kana tembiricha kana iyo ph kukosha yehurongwa ichichinja, iwo wisikopo wekuvhara haazokwanisi kuderedzwa zvakanyanya, uye pigment uye filler haizo zara. ; Kuchengetwa kwakanaka kugadzikana; Kuchengetwa kwemvura kwakanaka, hapana pachena kupupuma phenomenon uye hapana zvakashata mhedzisiro mukuita kweiyo inovhara firimu.
①cellulose thickener
Iyo cellulose thickeners inoshandiswa mumabhiza inonyanya kuvelcellose, hydroxylcellulose uye hydroxypruppropylmethesellosellose, uye maviri ekupedzisira anoshandiswa zvakanyanya.
Hydroxethyl Cellulose chigadzirwa chakawanikwa nekutsiva mapoka ehydroxyl pane zvikamu zveGlucose zvechisikigo mapoka emusango ane mapoka ehydroxethlys. Zvinyorwa uye mhando dzezvigadzirwa zvinonyanya kusiyaniswa zvichienderana nedanho rekutsiva uye viscosity.
Mhando dzehydroxyethyl cellerose dzinogovaniswa zvakare mune zvakajairika kupaza tylexolution mhando, kukurumidza kuparadzira mhando uye biological kugadzikana mhando. Sekushandiswa kwenzira yekushandisa ine hanya, hydroxylyl cellulose inogona kuwedzerwa pamatanho akasiyana mukubatanidza maitiro ekugadzira. Iyo inokurumidza-kupararira mhando inogona kuwedzerwa zvakananga muchimiro cheiyo yakaoma poda. Nekudaro, iyo PH Kukosha kweSystem Asati Wawedzera Inofanirwa Kupfuura 7, kunyanya nekuti nguva yeHydroxetHyl Cellown Kupfuura Mukati, uye ipapo iyo kukosha phinowedzera kuwanda kuti iite kupera nekukurumidza. Matanho anoenderana anogona kushandiswawo kugadzirira imwe yekushambadzira kweGlue Solution uye uwedzere kuCoaring system.
HydroxyPropyl methylcellose chigadzirwa chakawanikwa nekutsiva iyo hydroxyl boka pane yegirazi yemusango cellows, nepo chimwe chikamu chakatsiviwa nehydroxpropropropropropropropropropyl boka. Maitiro ayo akakora anonyatsofanana neiyo yeiyo hydroxytlyl cellulose. Uye zvinopesana nekushatisa kwe enzyematic, asi iyo solubility yemvura haina kunaka senge yeiyo hydroxylyl cellulose, uye ine kusagadzikana kwekushomeka kana kupiswa. Kune iyo yepamusoro-yakarapwa hydroxyprupropyl methylcellose, inogona kuwedzerwa zvakananga kumvura kana ichishandiswa. Mushure mekukurudzira uye kuparadzira, wedzera alkaline zvinhu zvakaita seAmoni mvura yekugadzirisa iyo pH Kukosha kusvika 8-9, uye kumutsa kusvikira akanyungudika. Kune hydroxyprupylpropyl methylcellose isina kurapwa pasina kurapwa, inogona kuputika nemvura inopisa pamusoro 85 ° C isati yashandiswa nemvura, ndokumutswa nemvura inotonhora kana mvura yechando yekunyungudika zvizere.
②Inorganic thickener
Rudzi urwu rwemberi runonyanya kuverengerwa zvevhu zvigadzirwa, zvakadai seBentonite, Magnesium aluminium Siltey Clay Mushure mekunge kuunganidzwa kwacho kwakaomeswa uye kunoumbwa mufirimu, kunoita semuridzi wemufirimu wekubatanidza, etc. "Chinhu chisina kunaka ndechekuti ichakanganisa zvakanyanya kuunganidzwa.
③ Synthetic Polymer Thickener
Synthetic Polymer Thickeners inonyanya kushandiswa muAcrylic nePolyurethane (Songs Songseners). Acrylic manhamba anonyanya kuwanda mapurikiri ane carboxyl mapoka. Mumvura ine ph kukosha kwe8-10, iyo carboxyl boka reboka uye rinobva razvimba; Kana iyo PH kukosha yakakura kupfuura gumi, inodonha mumvura uye inorasikirwa nemhedzisiro, saka maitiro akakora anotarisisa zvakanyanya kune ph kukosha.
Iyo yekukasira mashini yeiyo acrykener ndeyekuti zvimedu zvemahara zvacho zvinokatyamara pane iyo latex zvimedu, uye inowedzera ruzha rwekupfeka, uye zvinowedzera iyo brownian yekumhanya, uye inowedzera visikoka yeiyo pendi system. ; Chechipiri, kuzvimba kweiyo mauto anowedzera zvikwangwani zvechikamu chemvura.
(2) pesvedzero yematehwe ekubatanidza zvivakwa
Mhedzisiro yemhando yerudzi rwechienda pane zvimisheni zvetsiva zvekutengesa zviri seanotevera:
Kana huwandu hwehukadzi hunowedzera, iyo testic viscosity yependi inowedzera zvakanyanya, uye viscosity change maitiro anowanzoenderana kana akaiswa kune imwe nzvimbo yekunze.
Nemhedzisiro yeanoti, iyo visikopa yemapende inodonha nekukurumidza kana ichiiswa pasi peSheares, inoratidza pseudoplastical.
Uchishandisa hydrophobically yakagadziridzwa cellulose cellykener (yakadai seEBS451FQ), kumitambo yakakwirira shear, iyo viscosity ichiri yakakwira kana huwandu hwakakura.
Uchishandisa bhudhubenzi polyurethane thickeners (dzakadai seWT105a), kumitambo yakakwira Shear, iyo viscosity ichiri yakakwira kana huwandu hwakakura.
Kushandisa acrylic manhamba (senge maAse60), kunyangwe iyo yekufananidzira inosimuka nekukurumidza kana huwandu hukuru, iyo visikoity inodzikira nekukurumidza kune yakakwirira shear rate.
3. Songwane Thickener
(1) Scomping mechani
Cellulose ether uye Alkali-Shurallable Acticlal manhamba anogona chete kukanganisa pane zvimwe zvikamu zvekupenda, kana kuti hazvigone kukonzeresa kupindirana nependi uye zvimedu zvechipfuva hazvigone kugadziriswa.
Vafundisi vanosonganirwa vanoonekwa mune izvo kuwedzera mukuwedzera kuburikidza ne hydration, ivo zvakare vakakorodza kuburikidza nekushamwaridzana pakati pavo, nekuparadzanisa zvidimbu, uye nezvimwe zvinhu muhurongwa. Uku kushamwaridzana kunoparadzanisa kune yakakwirira Shear mitengo uye zvakare kushamwaridzana kuderera Shear mitengo, ichibvumira rheology yekubatanidza kuti igadziriswe.
Shini inoshamisa yemitambo yekushamwaridzana ndeyekuti iyo molecule is the linecule yeiyo hydrophilic ( zvisikwa. Mamorekuru akadai haakwanisi chete kuombera uye kuzvimba kuti uregedze chikamu chemvura, asi zvakare gadzira micelles kana kusangana kwemhedzisiro yemhedzisiro yake inopfuura imwe kukosha. Micelles anogona kusonganirana nePolymer zvikamu zve emulsion uye zvidimbu zvehundi izvo zvakadhindisa zvinopararira kuti vagadzire chikamu chechitatu, uye chakabatanidzwa uye chakabatanidzwa kuti uwedzere kuwanda kwehurongwa.
Chinhu chinonyanya kukosha ndechekuti idzi shamwari dziri mumamiriro ezvinhu ane simba, uye izvo zvinobatanidzwa micelles zvinogona kugadzirisa zvinzvimbo zvavo kana zvakaiswa nemauto ekunze, kuitira kuti kuunganidzira kuve nekukwira zvivakwa. Mukuwedzera, sezvo morekuru ane micelle akati wandei, chimiro ichi chinodzora tsika yemamolekyudhi emvura kuti vatamire uye nekudaro vanowedzera iyo yemukati chikamu chikamu.
(2) Basa racho muCoatings
Vazhinji vevakanyanya zvekushamwaridzana, uye huremo hwemafaro wavo uri pakati pegumi nemakumi matatu nemashanu ekukura, miviri miviri yehukuru pane yakajairwa polyacry acid uye cellulose thickener zvine manyorerwo pakati pe105-106. Nekuda kweiyo yakaderera molecular uremu, iyo vhoriyamu inobudirira yekuwedzera mushure mekunyora hydration ishoma, saka zvimisangano zvaro curvers iri mubato wekubata kumeso kupfuura izvo zvevasina kubwirana nacho.
Nekuda kweiyo yakaderera molecular uremu hwenzvimbo dzekushamwaridzana, its intermolecular Intanglement mumvura chikamu chetsiva ishoma, saka kukanganisa kwayo pamusoro pechidimbu chemvura haina kukosha. Muchiyero chakaderera shea Naizvozvo, iyo yekushamwaridzana yakabatana inoita kuti mvura-yakavakirwa pendi system kuratidzira yakaderera inooneka viscosity kana iri mune yakaderera shear rate.
Songdzane neThickeners vanowedzera simba rinogona kuwedzera pakati pemamorekuru nekuda kwesangano pakati pemakona pakati pezvikamu zvakaparadzirwa. Nenzira iyi, mamwe simba rinodiwa kupwanya kusonganira pakati pemamorita ari pamitambo mikuru Shear Zviripo zvevasiri. Iyo yepamusoro yepamusoro-shear viscosity uye yakaderera-shear viscosity inogona kungoita kuti kushaikwa kwezvinhu zvakajairika mune zvekupenda, ndiko kuti, iyo manhamba maviri inogona kushandiswa mukusanganiswa kwekuchinja kweiyo LASTEX Pendi. Kusiyana kwekuita, kusangana nezvinodiwa zvekutora kwekukanda mufirimu rakakora uye kuyerera kwefirimu kuyerera.
Kutumira Nguva: Nov-24-2022