Ni izihe ngaruka za porojeri ya redxersible latex kumikorere ya minisiteri ya EPS?

EPS granular yumuriro wa minisiteri ni ibikoresho byoroheje byokoresha ubushyuhe bwumuriro bivanze nimbuto zidasanzwe, guhuza ibinyabuzima, kuvanga, kuvanga no gukusanya urumuri muburyo runaka. Mu bushakashatsi burimo gukorwa no gushyira mu bikorwa ibipimo bya EPS bigabanya insimburangingo, ifu ya recyclable redispersible latex ifu ifite uruhare runini mu mikorere ya minisiteri kandi ikagira umwanya munini ugereranije nigiciro, bityo rero buri gihe ni byo byibandwaho cyane. Imikorere yo guhuza ibice bya EPS yubushyuhe bwa minisiteri yo hanze yurukuta rwoherejwe nubushyuhe bwa sisitemu ituruka ahanini kuri polymer binder, kandi ibiyigize ahanini ni vinyl acetate / Ethylene copolymer. Ubu bwoko bwa polymer emulsiyasi irashobora guterwa-yumishijwe kugirango ibone ifu ya redxersible. Bitewe no gutegura neza ifu ya latx isubirwamo mubwubatsi, ubwikorezi bworoshye hamwe nububiko bworoshye, ifu irekuye ya polymers yahindutse inzira yiterambere kubera imyiteguro yayo neza, ubwikorezi bworoshye nububiko bworoshye. Imikorere ya EPS ibice byokwirinda biterwa ahanini nubwoko nubunini bwa polymer yakoreshejwe. Ifu ya Ethylene-vinyl acetate ya latx (EVA) ifite etilene nyinshi hamwe na Tg (ubushyuhe bwikirahure bwikirahure) ifite imiterere myiza mubijyanye nimbaraga zingaruka, imbaraga zumubano hamwe no kurwanya amazi.

Gutezimbere imikorere yifu ya redxersible powderx kuri minisiteri biterwa nuko ifu ya polymer ari polymer ndende ya polymer hamwe nitsinda rya polar. Iyo RDP ivanze nuduce twa EPS, igice kitari inkingi mumurongo wingenzi wifu ya polymer kizajya kimenyekanisha kumubiri hamwe nubuso butari inkingi ya EPS. Amatsinda ya polar muri polymer yerekejwe hanze hejuru yubuso bwa EPS, bigatuma ibice bya EPS bihinduka biva kuri hydrophobique bigahinduka hydrophilique. Bitewe no guhindura ubuso bwibice bya EPS nifu ya polymer, ikibazo cyuko ibice bya EPS byoroshye guhura namazi birakemuka. Kureremba, ibibazo binini byo gusiba minisiteri. Muri iki gihe, iyo wongeyeho sima no gukurura, amatsinda ya polar yamamajwe hejuru yubutaka bwa EPS akorana nuduce twa sima kandi agahuza hafi, ibyo bikaba bitezimbere cyane imikorere yimikorere ya minisiteri ya EPS. Ibi bigaragarira mubyukuri ko ibice bya EPS bihindurwamo byoroshye na sima, kandi imbaraga zihuza zombi zateye imbere cyane.

Nyuma ya emulsion na redispersible latex ifu ikozwe muri firime, irashobora gukora imbaraga zidasanzwe kandi zihuza imbaraga kubikoresho bitandukanye. Zikoreshwa nka binder ya kabiri muri minisiteri kugirango ihuze na sima idasanzwe, sima na polymer. Kina imbaraga zijyanye no kunoza imikorere ya minisiteri. Iyo witegereje microstructure yibikoresho bya polymer-sima yibikoresho, hafatwa ko kongeramo ifu ya latxisible redxersible ishobora gutuma firime ya polymer iba igice cyurukuta rwumwobo, kandi bigatuma minisiteri ikora yose ikoresheje imbaraga zimbere, igateza imbere imbere imbaraga za minisiteri. Imbaraga za polymer, bityo bikongerera imbaraga zo kunanirwa kwa minisiteri no kongera imbaraga zanyuma. Kwiga imikorere miremire yifu ya redxersible powderx ya minisiteri, ikurikiranwa na scanning electron microscope, nyuma yimyaka 10, microstructure ya polymer muri minisiteri ntabwo yahindutse, ikomeza guhuza neza, imbaraga zihindagurika nimbaraga zo kwikuramo kimwe na Hydrophobique nziza. . Gufata ifu ya redxersible latex nkibikoresho byubushakashatsi, hashyizweho uburyo bwo gushiraho imbaraga zo guhuza tile, kandi byagaragaye ko nyuma yuko polymer yumishijwe muri firime, firime ya polymer yakoze isano ihuza hagati ya minisiteri na tile kuruhande rumwe; , kurundi ruhande, Polimeri ziri muri minisiteri yongerera umwuka umwuka wa minisiteri, bikagira ingaruka ku busumbane nubushuhe bwubuso, hanyuma nyuma mugihe cyo gushiraho, polymers nayo igira ingaruka nziza mubikorwa byo kuvomera kandi kugabanuka kwa sima. Ibifatika, ibi byose bifasha kongera imbaraga zubumwe.

Ongeramo ifu ya redxersible latex kuri minisiteri irashobora kuzamura cyane imbaraga zo guhuza hamwe nibindi bikoresho, kubera ko icyiciro cyamazi cyifu ya hydrophilique polymer ifu na sima ihagarikwa byinjira mumyobo na capillaries ya matrix, mugihe ifu ya latx yinjira mumyenge no muri capillary. Filime y'imbere irakozwe kandi irashimangirwa neza hejuru ya substrate, bityo bigatuma imbaraga zihuza hagati yibintu byashizwemo na substrate.