Ixesha lokunyanga laManzi lokungathathi hlangothi kweSilicone sealant

I. Umgaqo-siseko wezeNzululwazi waManzi{1}}Ukunyangwa kweSilanti yeSilicone eNgephakathi
Phakathi kwe-silicone sealant iphilisa ngokufuma{0}ukunyanga ukusabela. Inxalenye yayo engundoqo, i-silane polymer, ifumana i-hydrolysis{2}}i-condensation reaction kunye nokufuma (H₂O) emoyeni, yenze ubume bothungelwano - obunemilinganiselo emithathu. Le nkqubo yahlulwe yangamanqanaba amathathu:

1. Ukucofa -Ixesha lasimahla: Ifilim eelastiki yenziwe kumphezulu we-sealant, ethatha malunga nemizuzu engama-30 (25℃/50% ukufuma). Iyachukumiseka kodwa hayi uxinzelelo{6}}iyaxhathisa.

2. Unyango olunzulu: Amanzi kufuneka angene ngaphakathi kwi-sealant layer, efuna malunga neeyure ezingama-24 nge-millimeter yobukhulu (umthombo wedatha: ASTM C920-2021).

3. Unyango olupheleleyo: Ukufikelela kumandla okugqibela kufuna ubuncinane iiyure ezingama-48. Ixesha elikhethekileyo lichatshazelwa zezi zinto zilandelayo:

- Ukufuma kwe-Ambient: Ukunyanga kulibaziseka ngaphantsi kwe-40%, ngelixa amaqondo obushushu angaphezu kwe-70% anokunciphisa ixesha lokunyanga nge-20%.

- Iqondo lobushushu: Ixesha lokunyanga liphinda-phindwe kabini kwi-10℃yehla (umzekelo, iiyure ezingama-72 kwi-15 degree).

II. Ukunyangwa okuKhawulezileyo kunye nokuJonga iNgxaki
1. Iindlela zokuKhawuleza:

- Tshiza inkungu yamanzi ukonyusa ukufuma (uphephe ukuntywiliselwa ngokuthe ngqo).

- Sebenzisa isixhobo sokufudumeza (njengesifudumezi) ukugcina imo engqongileyo yama-30 ukuze unciphise ixesha lokunyanga ukuya kwiiyure eziyi-18.

2. Iingxaki eziqhelekileyo:

- Ukwenziwa mhlophe kwe-colloid: Ukufuma okugqithisileyo kubangela ukuba ii-monomers ezingaphendulwanga zibe manzi; lawula umthamo wokutshiza.

- Ukungaphumeleli kokuncamathela: I-oyile substrates okanye amaqondo obushushu angaphantsi kwe-5℃afuna ukunyangwa kwangaphambili kunye nexesha elongeziweyo lokunyanga.

III. Iinkcukacha zoBuchule kunye neeNgcebiso zeSicelo
Ngokweemvavanyo eziqhutywe yi-Sealant Council (SSC), ixesha lokunyanga leempawu ezahlukeneyo ze-adhesive adhesive silicone engathathi hlangothi iyahluka ngaphantsi kwe-10%. Izindululo:

- Kwiindawo ezifumileyo ezinje ngamakhitshi kunye nezindlu zokuhlambela, sebenzisa uhlobo lwe "mildew{1}}resistant" (njengeDow Corning DOWSIL 791). Ukumelana namanzi konyuka nge-50% emva kokunyanga.

- Ziphephe iintsuku zemvula xa ufaka isicelo sangaphandle; Ukuchaneka kwemvula ngaphambi kokunyanga kunokubangela ukuba i-colloid idumbe okanye iqhekeke.