Ama-polymers abuyiselwe kabusha (i-RDP) ekwakhiweni okunama-anama anamathela

1. Sibutsetelo
I-Redispersergeble Polymers (RDP) iyisigaba esibalulekile sezengezo esidlala indima ebalulekile ekwakhiweni kwama-adhesives kanye nama-sealants. Lawa ma-polymers ajwayele ukuthola ifomu le-powder futhi angahlakazeka emanzini ukuze akhe i-emulsion ezinzile, ngaleyo ndlela enikeze izakhiwo ezithile ezibonakalayo. I-RDP isetshenziswa kabanzi ekwakhiweni, ekuhlobiseni kwasekhaya kanye nezicelo zezimboni. Imisebenzi yayo eyinhloko ibandakanya ukuthuthukisa ukunamathela, ukuthuthukisa ukuguquguquka, ukuthuthukisa ukuhamba kanye nokuthuthukisa ukumelana kwamanzi.

2. Ukwakheka nezinhlobo ze-polymers evuselelayo
Ama-polymers abuyiselwe kabusha ajwayele ukwakhiwa i-ethylene-vinyl acetate copolymer (EVA), i-Styrene-Butetate Copolymer (SBR), i-Vinyl acetate-ethylete copolymer (verc), njr), njr), njr), njl), njl), njll. I-RDP yakhelwe ngokufaka ama-polymers nama-colloids avikelayo (njengotshwala be-polyvinyl). Ngemuva kokomiswa kwesifutho, i-powder ephumayo ingakha kabusha i-emulsion ngemuva kokungeza amanzi.

Izici zokusebenza nezicelo ze-RDP zihlobene kakhulu nokwakheka kwalo. Ngokwesibonelo:

I-EVA: Inezakhiwo ezinhle kakhulu zokubopha kanye nokumelana kwamanzi futhi ivame ukusetshenziswa ezinhlelweni zamathayela nezinhlelo zangaphandle zokufakelwa kodonga lwangaphandle.
I-SBR: Ukuvumelana nezimo okuhle kakhulu nokuvimbela ukugqokwa, okulungele ama-sealants aguquguqukayo nezingubo zokunwebeka.
I-VAE: Ukuhlanganisa izinzuzo ze-EVA ne-SBR, kusetshenziswa kabanzi ekuhlolweni okuhlukahlukene okudinga ukusebenza okulinganiselayo.

3. Indima ezinamathela
Ezindaweni ezinamathelayo, i-RDP isetshenziselwa ikakhulukazi ukuthuthukisa amandla okubopha nokuvumelana nezimo. Izindima zalo ezikhethekile zifaka:

3.1 Ukuthuthukisa ukusebenza kwe-Bonding
I-RDP ingathuthukisa ngempumelelo ukunamathela kokunamathela kuma-substrates ahlukene, ikakhulukazi kuma-substrates e-POROUS nase-Absent. Isibonelo, engeza i-RDP kuya kuma-tile anamanzi angakhulisa amandla abo okuqina nokumelana kwamanzi, ngaleyo ndlela anwebe impilo yenkonzo yama-tile.

3.2 Ukuthuthukisa Ukuvumelana nezimo
Ukuzivumelanisa nezimo kungenye yezinkomba zokusebenza ezibalulekile zokunamathela, ikakhulukazi lapho kusebenza ngokushintsha izinga lokushisa noma ukufuduka okuphansi. Ukungezwa kwe-RDP kunganikeza ukuguquguquka okungcono okungcono futhi kunciphise ubungozi bokuqhekeka noma ukubhebhana. Lokhu kubaluleke kakhulu kwizicelo zasendlini nasengaphandle, ikakhulukazi ezindaweni ezinemihluko omkhulu wokushisa.

3.3 Ukwenza ngcono uxhaso kanye nokwenza umsebenzi wokwakha
I-RDP ingathuthukisa uketshezi lwezinamathela, okwenza kube lula ukusebenzisa futhi zilungise ngenkathi kwakhiwa. U-Fluodity omuhle awugcini nje ngokuthuthukisa ukusebenza kahle kokwakha, kepha futhi uqinisekisa ukufana kokunamathela, ngaleyo ndlela uthuthukise ikhwalithi yokubopha.

4. Indima kumaalants
I-RDP nayo idlala indima ebalulekile ekwakhekeni kwe-sealant. Indima yayo eyinhloko ibonakala kulezi zinto ezilandelayo:

4.1 Ukusebenza kokubekwa uphawu okuthuthukisiwe
I-RDP ingakha ifilimu elinzima le-polymer ku-sealant ukuthuthukisa ukuqina komoya kanye nokuqina kwamanzi kwe-sealant. Lokhu kunomthelela obalulekile ekwakheni amalunga nokubekwa uphawu kwezimboni, ikakhulukazi ezindaweni ezinomswakama.

4.2 Ukumelana Nesimo Sezulu Ethuthukisiwe
Ukumelana nesimo sezulu esihle yisiqinisekiso sokusetshenziswa kwe-sealants eside. Ukungezwa kwe-RDP kungathuthukisa ukumelana kwe-sealant kwezici zezemvelo ezinjengemisebe ye-ultraviolet ne-ozone, futhi kwandise impilo yeseva ye-sealant.

4.3 nikeza ukuqina nokuqina
I-RDP inganikeza i-sealant enhle yokuqina nokuqina, ukuze isheshe ibuyele esimweni sayo sokuqala lapho ifakwa emandleni angaphandle noma ama-deformation of the substrate, ukugwema ukuqhekeka nokuwa.

I-5. Ukucatshangelwa ekwakheni ukwakheka
Lapho usebenzisa i-RDP ekunikezelweni kokunamathela nokunamathela, lezi zinto ezilandelayo zidinga ukubhekwa:

5.1 Ukukhetha kwe-RDP
Khetha uhlobo olufanele lwe-RDP ngokuya ngezidingo zohlelo lokusebenza. Isibonelo, ukuze anama-adhesives adinga amandla aphezulu abugqilayo, i-EVA-based RDP ingakhethwa; Kuma-sealants anezidingo eziphakeme zokuguquguquka, i-RDP esekelwe kwi-SBR.

5.2 Ukulawulwa kwemithamo
Umthamo we-RDP uthinta ngqo ukusebenza kwezinamathela kanye nama-sealants. I-RDP eningi kakhulu ingahle iholele ezindlekweni ezandisiwe, ngenkathi i-RDP encane kakhulu ayikwazi ukufeza umphumela olindelekile. Ngakho-ke, kuyadingeka ukuyilawula kahle ngokwezidingo zangempela nokwakhiwa.

5.3 Synergy nezinye izithasiselo
I-RDP ivame ukusetshenziswa nezinye izengezo (ezifana nabakhulu, ama-deforsors, invitors invitors, njll.) Ukwenza ngcono ukusebenza kokwakha. Lapho uklama ukwakhiwa, kuyadingeka ukuze ubheke ngokugcwele umphumela we-synergistic yengxenye ngayinye ukuze uqinisekise ukuthi ukusebenza komkhiqizo wokugcina kulungile.

Ama-polymers abukezayo anenani elibanzi lenani lesicelo ekunikezelweni kokunamathela kanye ne-sealant. Ngokukhetha ngokunengqondo nokusebenzisa i-RDP, ukusebenza kwezikhangiso kanye nama-sealants kungathuthukiswa kakhulu ukufeza izidingo zezimo ezihlukile zohlelo lokusebenza. Ngokuzayo, ngokuthuthukiswa kobuchwepheshe kanye nezinguquko ekufuneni kwemakethe, amathemba wesicelo se-RDP ezintweni ezintsha kanye nokuvikelwa okuluhlaza okotshani kuzobe kubanzi.