Kuxelwe ukuba i-adhesive yesakhiwo se-silicone i-adhesive isetyenziswa ngokubanzi kuluhlu lobushushu lwe-5 ~ 40 ℃. Xa ubushushu bomhlaba we-substrate buphezulu kakhulu (ngaphezu kwama-50 ℃), ukwakhiwa akunakuqhutywa. Ngeli xesha, ulwakhiwo lunokubangela ukusabela kokunyanga kwe-sealant yesakhiwo ukuba ikhawuleze kakhulu, kwaye izinto ezincinci ezenziwe nge-molekyuli azinaxesha lokufuduka ngaphandle kwe-colloid, kwaye ziqokelele ngaphakathi kwi-colloid ukwenza amaqamza, ngaloo ndlela atshabalalise. imbonakalo yomphezulu weglue edibeneyo. Ukuba iqondo lokushisa liphantsi kakhulu, isantya sokunyanga se-sealant yokwakha siya kuncipha, kwaye inkqubo yokunyanga iya kwandiswa kakhulu. Ngethuba le nkqubo, izinto eziphathekayo zinokwandisa okanye isivumelwano ngenxa yokuhluka kweqondo lokushisa, kwaye i-extrusion ye-sealant inokuphazamisa ukubonakala.
Xa ubushushu bungaphantsi kwe-4 ℃, umphezulu we-substrate kulula ukujiya, ukukhenkceka kunye neqabaka, ezisa iingozi ezinkulu ezifihliweyo kwikhonkco. Nangona kunjalo, ukuba unakekele ukucoca umbethe, i-icing, iqabaka kunye nolwazi oluthile, i-adhesives yokwakha ingasetyenziselwa ukwakhiwa kwegluing eqhelekileyo.
Ukucocwa komgangatho wezinto eziphathekayo kubalulekile ekutywineni nasekubopheni. Ngaphambi kokudibanisa, i-substrate kufuneka ihlanjululwe nge-solvent. Nangona kunjalo, i-volatilization yokucoca kunye ne-ejenti yokulinganisa iya kuthatha amanzi amaninzi, okuya kwenza ubushushu bomhlaba we-substrate buphantsi kunobushushu bomphezulu benkcubeko yeringi eyomileyo. Kwindawo enobushushu obuphantsi bokumisa, kulula ukuhambisa amanzi ajikelezileyo kwi-substrate enye enye Kunzima kubasebenzi abathile ukuba baqaphele umphezulu wezinto eziphathekayo. Ngokwemeko eqhelekileyo, kulula ukubangela ukungaphumeleli kokubambisana kunye nokuhlukana kwe-sealant kunye ne-substrate. Indlela yokuphepha iimeko ezifanayo kukucoca i-substrate ngendwangu eyomileyo ngexesha emva kokucoca i-substrate nge-solvent. Amanzi adibeneyo nawo aya kucinywa nge-rag, kwaye kungcono ukusebenzisa i-glue ngexesha.
Xa ukwanda kwe-thermal kunye ne-contract contraction displacement yezinto ngenxa yokushisa kukhulu kakhulu, akufanelekanga ukwakhiwa. Xa ukwakhiwa kwesakhiwo se-silicone sealant sihamba kwicala elinye emva kokunyanga, kunokubangela ukuba i-sealant ihlale kwi-tension okanye i-compression, enokubangela ukuba i-sealant ihambe kwicala elinye emva kokunyanga.
Ixesha lokuposa: May-20-2022