Waqtigan xaadirka ah, waxaa jira noocyo badan oo caan ah oo ka kooban hal qaybood oo ka kooban halbeegga falcelinta fal-celinta laastikada ah ee suuqa, gaar ahaan alaabada silikoon iyo polyurethane sealant.Noocyada kala duwan ee xirmooyinka laastikada waxay leeyihiin kala duwanaansho kooxahooda firfircoon waxayna daaweeyeen qaababka silsiladda muhiimka ah.Natiijo ahaan, waxaa jira xaddidaadyo badan ama ka yar qaybaheeda iyo beeraheeda lagu dabaqi karo.Halkan, waxaanu ku soo bandhigaynaa hababka daawaynta ee dhawr qaybood oo caadi ah oo ka kooban halbeegyo fal-celin falcelin ah oo laastikada ah waxaanan is barbar dhignaa faa'iidooyinka iyo khasaarooyinka noocyada kala duwan ee xirmooyinka laastikada, si aan u sii qoto dheereyno fahamkeena oo aan u samayno doorashooyin ku habboon codsiyada la taaban karo.
1. Habka daawaynta laastikada ka falcelisa hal-ka kooban ee caadiga ah
Shaabadaynta laastikada hal-ka kooban ee caadiga ah waxaa ka mid ah: silicone (SR), polyurethane (PU), polyurethane silyl-terminated modified polyeter (MS), prepolymer-ku wuxuu leeyahay kooxo firfircoon oo kala duwan iyo habab falcelin daaweyneed oo kala duwan.
1.1Habka lagu daaweynayo ee silikoon elastomer sealant
Jaantuska 1. Habka daawaynta ee daboolka silikoon
Marka la isticmaalo shaabadeeyayaasha silikoon, prepolymer-ku wuxuu ka falceliyaa xaddi qoyaan ah oo hawada ku jira ka dibna wuxuu xoojiyaa ama vulcanizes hoostiisa ficilka kicinta.Alaabooyinka ka soo baxay waa walxo molecular oo yaryar.Habka waxa lagu muujiyay sawirka 1. Marka loo eego walxaha yaryar ee kala duwan ee la sii daayo inta lagu jiro daawaynta, silikoon sealant waxa kale oo loo qaybin karaa nooca deacidification, nooca deketoxime, iyo nooca dealcoholization.Faa'iidooyinka iyo khasaaraha ay leeyihiin noocyadan xabagta silikoonka ayaa lagu soo koobay shaxda 1.
Shaxda 1.Isbarbardhigga faa'iidooyinka iyo khasaarooyinka dhowr nooc oo ah xabagta silikoon
1.2 Habka daawaynta ee daboolka laastikada ee polyurethane
Hal qayb oo ka kooban polyurethane sealant (PU) waa nooc ka mid ah polymer ka kooban qaybaha urethane soo noqnoqda (-NHCOO-) ee silsiladda ugu weyn ee molecule.Habka daawaynta ayaa ah in isocyanate ay la falgasho biyo si ay u samayso carbamate dhexdhexaad ah oo aan degganayn, ka dibna si degdeg ah u burbura si ay u abuurto CO2 iyo amine, ka dibna amine-ku wuxuu ka falceliyaa isocyanate xad-dhaaf ah nidaamka, ugu dambeyntii wuxuu sameeyaa elastomer leh qaab-dhismeedka shabakad.Qaabka falcelinta daawaynta waa sida soo socota:
Jaantuska 1.Curing reaction reaction of polyurethane sealant
1.3 Habka daaweynta ee silane-la beddelay poliurethane sealant
Jaantuska 3. Habka falcelinta ee silane-la beddelay ee suufka poliurethane
Iyadoo la eegayo cilladaha qaar ee xirmooyinka poliurethane, polyurethane ayaa dhawaan lagu bedelay silane si loo diyaariyo xabagta, sameynta nooc cusub oo dhejis ah oo leh silsilad weyn oo qaab dhismeedka poliurethane ah iyo kooxda dhamaadka alkoxysilane, oo loo yaqaan silane-modified polyurethane sealant (SPU).Dareen-celinta daaweynta ee noocan ah ee shaabadeynta waxay la mid tahay tan silikoon, taas oo ah, kooxaha alkoksy waxay ka falceliyaan qoyaan si ay u maraan hydrolysis iyo polycondensation si ay u sameeyaan qaab-dhismeedka shabakada saddex-geesoodka ah ee Si-O-Si deggan (Jaantus 3).Dhibcaha isku-xidhka shabakada iyo inta u dhaxaysa dhibcaha isku-dhafan waa qaab-dhismeedka qaybta dabacsan ee polyurethane.
1.4 Habka daawaynta ee shaabadeeyayaasha silyl-ka-joojiyay
Silyl-terminated polyether sealant (MS) waa koolo laastiik ah oo ka kooban hal unug oo ku salaysan wax ka beddelka silan.Waxay isku daraysaa faa'iidooyinka poliurethane iyo silikoon labadaba, waa jiil cusub oo ah alaabada dhejiska ah ee dhejiska ah, oo bilaash ah PVC, saliid silikoon, isocyyanate iyo dareere.Xabagta MS waxay la falgashaa qoyaanka hawada ku jira heerkulka qolka, sidaa darteed polymer-ka silanized ee leh -Si (OR) AMA -SIR (AMA) - qaab-dhismeedku waa hydrolyzed dhamaadka silsiladda oo iskutallaabay elastomer leh Si-O- Si qaab-dhismeedka shabakadda si loo gaadho saamayn xidhidh iyo xidhidh.Habka falcelinta daawaynta waa sida soo socota:
Jaantus 4. Habka daawaynta ee suufka silyalka-joojiyay ee polyeter-ka
2. Isbarbardhigga faa'iidooyinka iyo faa'iido darrada ee shaameeyeyaasha falcelinta falceliska ah ee ka kooban hal unugga caadiga ah
2.1 Faa'iidooyinka iyo faa'iido darrada ku jirta shaabadda silikoon
Faa'iidooyinka silikoonka shaambadeynta:
① Iska caabin cimilo oo heer sare ah, iska caabin oksijiin, iska caabin ozone iyo iska caabin ultraviolet;② Dabacsanaan heerkul hoose oo wanaagsan.
⑵ Khasaaraha uu leeyahay shaabadda silikoon:
① Dib u qurxin xumo oo aan la rinji karin;②Xoogga ilmada oo hooseeya;③ Iska caabbinta saliidda oo aan ku filnayn;④ Aan dalool u adkaysan karin;⑤Lakabka koollada ayaa si fudud u soo saara caleen saliid leh oo wasakhaysa shubka, dhagaxa iyo waxyaalaha kale ee dabacsan.
2.2 Faa'iidooyinka iyo khasaaraha Sealants Polyurethane
Faa'iidooyinka poliurethane sealant:
① Ku dhajinta wanaagsan ee noocyada kala duwan ee substrates;② Dabacsanaan heerkul hoose oo heersare ah;③ Balaasti wanaagsan iyo sifooyin soo kabasho oo aad u wanaagsan, oo ku habboon kala-goysyada firfircoon;④ Awoodda farsamada sare, caabbinta xirashada aadka u fiican, caabbinta saliidda iyo caabbinta gabowga nafleyda;⑤ Inta badan hal qaybood oo ka kooban qoyaan-daaweynta polyurethane sealants waa kuwo aan dareere lahayn oo aan wax wasakh ah ku lahayn substrate-ka iyo deegaanka;⑥ Dusha sare ee daboolka waa la rinjiyeeyaa oo si fudud loo isticmaali karaa.
⑵ Khasaaraha poliurethane sealant:
① Marka lagu daaweynayo jawi heerkul sare iyo qoyaan sare leh xawaare aad u dheereeya, xumbo si fudud ayaa loo soo saaraa, taas oo saameynaysa waxqabadka xirmooyinka;② Marka la isku xidho oo la xidho qaybaha substrate-ka aan daloolin (sida dhalooyinka, birta, iwm.), furaha guud ahaan ayaa loo baahan yahay;③ Shallow Qaabka midabku wuxuu u nugul yahay gabowga UV, iyo xasilloonida kaydinta koollada waxaa si weyn u saameeya baakadaha iyo xaaladaha dibadda;④ Iska caabbinta kulaylka iyo caabbinta gabowga ayaa waxyar ku filan.
2.3 Faa'iidooyinka iyo faa'iido darrada xirmooyinka polyurethane ee silane-la beddelay
Faa'iidooyinka daboolka polyurethane ee la beddelay silane:
① Daawaynta ma soo saarto xumbo;② Waxay leedahay dabacsanaan wanaagsan, caabbinta hydrolysis iyo xasilloonida caabbinta kiimikada;③ Iska caabin cimilo oo heer sare ah, caabbinta kulaylka, caabbinta gabowga, xasilloonida kaydinta alaabta;④ La qabsiga ballaaran ee substrate-ka, marka la isku xirayo Guud ahaan, looma baahna furiye;⑤ Dusha waa la rinjin karaa.
⑵ Khasaaraha poliurethane ee la beddelay silane:
① Iska caabbinta UV uma fiicna tan silikoon;② Iska caabbinta jeexjeexa ayaa waxyar ka sii xun kan xuubka polyurethane.
2.4 Faa'iidooyinka iyo faa'iido darrada suufka suufka ah ee silyl-ka joojiyay
Faa'iidooyinka suufka polyeter-ka ee silyl-ka-joojiyay:
① Waxay leedahay sifooyin isku xidhid heersare ah inta badan substrate-yada waxayna gaari kartaa isku xidhka firfircoonida bilaa aasaasiga ah;② Waxay leedahay iska caabbinta kulaylka iyo caabbinta gabowga UV marka loo eego polyurethane caadiga ah;③ Waxaa lagu rinjiyeeyaa oogada sare.
⑵ Khasaaraha suufka polyeter-ka ee silyl-ka-joojiyay:
① Iska caabbinta cimiladu uma fiicna sida silikoon silikoon, iyo dildilaaca ayaa ka muuqda dusha sare ka dib gabow;② Ku dheggan galaasku waa liitaa.
Hordhaca kor ku xusan, waxaan ku leenahay faham horudhac ah oo ku saabsan hababka daaweynta ee dhowr nooc oo caadi ahaan la isticmaalo oo ka kooban hal qaybood oo fal-celiska elastic ah, iyo marka la barbardhigo faa'iidooyinka iyo khasaarooyinka, waxaan ku guuleysan karnaa fahamka guud ee badeecad kasta.Codsiyada wax ku oolka ah, shaabadeynta waxaa lagu dooran karaa iyadoo loo eegayo shuruudaha codsiga dhabta ah ee qaybta isku-xidhka si loo gaaro xirid wanaagsan ama xiritaanka qaybta codsiga.
Waqtiga boostada: Nov-15-2023