I-Methylhydroxyethylcellulose (MHEC) idlala indima ephambili ekuphuculeni ukuhambelana kwe-putty, into esetyenziswa ngokubanzi kumashishini ahlukeneyo kuquka ukwakhiwa, iimoto kunye nokuvelisa.Eli nqaku linika uhlalutyo olunzulu lweempawu ze-MHEC kunye nefuthe layo elibalulekileyo ekuphuculweni kwe-putty consistency.Iphonononga ukubunjwa kweekhemikhali, iipropati ezibonakalayo, kunye neendlela zesenzo se-MHEC kwi-putty formulations.
I-Putty yimathiriyeli eguquguqukayo esetyenziswa ngokubanzi kulwakhiwo, ukulungiswa kweemoto, ukwenziwa kunye noluhlu lwamanye amashishini.Ukuhambelana kwayo yinto ephambili ekunqumeni ukusetyenziswa kwayo kunye nokusebenza kwayo kwizicelo ezahlukeneyo.Ukufezekisa ukuhambelana okunqwenelekayo kwe-putty kufuna ukulungisa imingeni eyahlukeneyo efana nolawulo lwe-viscosity, ukusebenza kunye neempawu zokunamathela.I-Methylhydroxyethylcellulose (MHEC) ivela njengesongezo esibalulekileyo esandisa kakhulu ukuhambelana kwe-putty ngelixa kuphucula iimpawu zayo zokusebenza.
1. Ukubunjwa kweekhemikhali kunye neempawu ezibonakalayo ze-MHEC
I-MHEC i-ether ye-cellulose e-nonionic efunyenwe ngokuguqulwa kweekhemikhali ze-cellulose.Idityaniswa ngokusabela i-cellulose nge-ethylene oxide kunye ne-methyl chloride ukwazisa i-hydroxyethyl kunye namaqela e-methyl kwikhonkco eliphambili leselulosi.I-degree of substitution (DS) ye-hydroxyethyl kunye namaqela e-methyl ichaphazela kakhulu iipropati ze-MHEC, kubandakanywa ukunyibilika, i-viscosity, kunye nokuziphatha kwe-rheological.
Isakhiwo se-molecular ye-MHEC inika iipropati ezikhethekileyo, okwenza kube yinto efanelekileyo kwizicelo ezahlukeneyo, kubandakanywa ne-putty formulations.I-MHEC ine-solubility egqwesileyo yamanzi kwaye yenza isisombululo esicacileyo nesizinzileyo xa ihlakazekile emanzini.Olu phawu lokunyibilika luququzelela ukusasazeka phakathi kwe-putty matrix, iqinisekisa ukusebenza okungaguqukiyo ukusuka kwibhetshi ukuya kwibhetshi.
I-MHEC inika i-pseudoplastic rheological behavior to putty formulations, oku kuthetha ukuba i-viscosity yayo iyancipha ngokunyuka kwezinga lokucheba.Le propati ye-rheological iphakamisa ukusebenza kwe-putty, ukukhululeka kwesicelo kunye nokubunjwa, ngelixa igcina ukuxhathisa okwaneleyo kwe-sag kunye nokuziphatha kwe-thixotropic.
I-MHEC ineepropati ezintle kakhulu zokwenza ifilimu, inceda ekuphuculeni amandla adibeneyo kunye nokunamathela kwe-putty kwi-substrate surface.Ikhono layo lokwenza ifilimu lidala umqobo wokukhusela, ukuqinisa ukuqina kunye nokuchasana kwemozulu, okwenza i-putty ifaneleke kwizicelo zangaphandle.
2. Indlela yokusebenza ye-MHEC kwi-putty formulations
Indima ye-MHEC ekuphuculeni ukuhambelana kwe-putty ininzi kwaye ibandakanya iindlela ezininzi zokwenza izinto ezichaphazela iimpawu zayo ze-rheological kunye nokusebenza.
Enye indlela ephambili yi-hydration kunye nokuvuvukala kwee-molecule ze-MHEC kwi-putty formulations yamanzi.Xa ihlakazekile emanzini, i-MHEC ikhonkco i-hydrate, ibangele ukubunjwa kwenethiwekhi ye-polymer ye-hydrated ngaphakathi kwe-putty matrix.Esi sakhiwo sothungelwano sinika i-putty viscosity kunye nokuziphatha kwe-pseudoplastic, evumela ukuba ihambe ngokulula phantsi koxinzelelo lwe-shear ngelixa igcina i-static shape kunye nokubambisana.
I-MHEC isebenza njenge-thickener ngokunyusa i-viscosity yesigaba samanzi kwi-putty formula.Ubume be-hydrophilic be-MHEC bukhuthaza ukugcinwa kwamanzi, ukuthintela ukukhuphuka okugqithisileyo kunye nokomisa kwe-putty ngexesha lokusetyenziswa.Esi sixhobo sokugcina amanzi sandisa ixesha elivulekileyo le-putty, livumela ixesha elaneleyo lokusebenza ngaphambi kokumisela, ukwandisa ukuguquguquka kwesicelo kunye nokunciphisa inkunkuma yezinto eziphathekayo.
I-MHEC isebenza njenge-binder kunye ne-stabilizer kwi-putty formulations.Ngokwenza iibhondi ze-hydrogen kunye namanye amacandelo anjengama-fillers, ii-pigments kunye neepolymers.Olu nxibelelwano lukhuthaza ukufana kunye nokusasazwa okufanayo kwezongezo ngaphakathi kwe-putty matrix, ngaloo ndlela kuphucula iimpawu zoomatshini, ukuhambelana kombala kunye nokusebenza ngokubanzi.
I-MHEC inegalelo kwindlela yokuziphatha yethixotropic ye-putty, oku kuthetha ukuba ibonisa i-viscosity ephezulu ekuphumleni kunye ne-viscosity ephantsi phantsi koxinzelelo lwe-shear.Le propati iququzelela usetyenziso olulula kunye nokusabalalisa i-putty ngelixa ikhusela ukudilika okanye ukuwa kwiindawo ezithe nkqo.Ubume be-thixotropic be-putty formulations equkethe i-MHEC iqinisekisa ukugubungela ngokugqithiseleyo kunye nokufana kwemigangatho esetyenzisiweyo, ngaloo ndlela iphucula i-aesthetics kunye nokugqitywa kwendawo.
3. Izinto ezichaphazela ukuqina kwe-putty kunye nendima ye-MHEC
Kukho izinto ezininzi ezichaphazela ukuhambelana kweefomyula ze-putty, kubandakanywa uhlobo kunye nomgangatho wezinto eziluhlaza, iiparamitha zefomula, iimeko zokucubungula kunye nezinto zokusingqongileyo.I-MHEC idlala indima ebalulekileyo ekujonganeni nale miba kunye nokwandisa ukuguquguquka kwe-putty ukuhlangabezana neemfuno ezithile zokusebenza.
Umba obalulekileyo ubungakanani beqhekeza kunye nokusabalalisa izizaliso kunye neepigments kwi-putty formulation.Iincinci ezintle zivame ukwandisa i-viscosity kunye ne-thixotropy, ngelixa iinqununu ezinqabileyo zinganciphisa ukuhamba kunye nokufana.I-MHEC inceda ukunciphisa le miba ngokukhuthaza ukusabalalisa okufanayo kunye nokumiswa kweengqungquthela ngaphakathi kwe-putty matrix, ukuqinisekisa i-viscosity ehambelanayo kunye nokuziphatha kwe-rheological.
Ubungakanani kunye nokuhambelana kwamacandelo ahlukeneyo kwifomula yeputty nako kuchaphazela ukungaguquguquki kunye nokusebenza kweputty.I-MHEC isebenza njenge-compatibilizer kunye ne-rheology modifier, ikhuthaza ukuxutywa kwezinto ezongezelelweyo ezifana ne-resin, i-plasticizers kunye ne-rheology modifiers.Iipropati zayo eziguquguqukayo zivumela abaqulunqi ukuba baziqhelanise kwaye balungise kakuhle iimpawu ze-rheological ze-putty kwiimfuno ezithile zesicelo.
Iiparamitha zokucubungula ezifana nesantya sokuxuba, ukushisa, kunye nesantya se-shear kunokuchaphazela ukusabalalisa kunye nokusebenzisana kwe-MHEC kwi-putty formulations.Ukuphucula ezi parameters kuqinisekisa i-hydration efanelekileyo kunye nokusebenza kwee-molecule ze-MHEC, ukwandisa ukuqina kwazo, ukuzinzisa, kunye nemiphumo yokubopha.
Ukongeza, iimeko zokusingqongileyo ezifana nokufuma, ubushushu kunye neempawu zomphezulu we-substrate zinokuchaphazela usetyenziso kunye nokuziphatha kokunyanga kwe-putty.I-MHEC iphakamisa ukugcinwa kwamanzi kunye neempawu zokubambelela kwi-putty, okwenza ukuba ifaneleke kwiimeko ezahlukeneyo zokusingqongileyo kunye nezixhobo ze-substrate.
4. Ubuchule bokusetyenziswa kunye nokuqwalaselwa kwedosi
Ukusetyenziswa okusebenzayo kwe-MHEC ekuqulunqweni kwe-putty kufuna ukuqwalaselwa ngenyameko kweendlela zokusetyenziswa kunye namanqanaba edosi ukufezekisa ukuhambelana okufunwayo kunye neempawu zokusebenza.Ukuxuba ngokufanelekileyo, ukusetyenziswa kunye neenkqubo zokunyanga zibalulekile ukuqinisekisa ukuhanjiswa okufanayo kunye nokusebenza kwe-MHEC ngaphakathi kwe-putty matrix.
Ngethuba lokuphuhliswa kokuqulunqwa, kubalulekile ukugqiba inani elichanekileyo le-MHEC esekelwe kwiimfuno ezithile zokusebenza ezifana ne-viscosity, i-sag resistance, kunye nexesha lokumisa.Isixa se-MHEC esisetyenzisiweyo sinokuhluka ngokuxhomekeka kwizinto ezifana nohlobo lwe-putty, indlela yesicelo, iimeko ze-substrate kunye nezinto ezisingqongileyo.
Ngokuxhomekeke kubume be-substrate, ukugqiba umgangatho ofunwayo kunye neemfuno zeprojekthi, iindlela ezahlukeneyo zokwakha zingasetyenziselwa, kubandakanywa ukuxubha ngesandla, ukutshiza kunye nokukhupha.I-Putty formulations equlethe i-MHEC ibonisa ukuhambelana okugqwesileyo kunye neendlela ezahlukeneyo zesicelo, ezivumela ukuguquguquka kunye nokuguquguquka ekusebenziseni.
Ixesha lokuposa: Feb-28-2024