Cov lus piav qhia ntxaws ntxaws ntawm cov qauv sib piv ntawm cov khoom siv polyurethane dawb, ob lub ntsiab lus polyurethane yam ntxwv thiab muaj pes tsawg leeg
1. Cov yam ntxwv ntawm ob lub ntsiab lus polyurethane:
ib. Modulus modulus, siab elasticity, siab elongation, laus kuj, tsis kub tsis kam, dej tsis kam, acid thiab alkali corrosion kuj, thiab zoo qaug zog kuj.
b. Muaj zog adhesion rau cov khoom siv hauv tsev xws li cement, ntoo, hlau, iav, thiab yas.
c. Cov khoom no yog hnyav-dawb, tar, asphalt-free, non-polluting, non-toxic, thiab yuav siv tau rau sealing thiab waterproofing ntawm cov dej haus pas dej ua ke thiab pas dej ua ke.
d. Txoj kev tsim kho yog yooj yim. Thaum lub sij hawm tsim kho, tsuas yog ob lub Cheebtsam A thiab B yuav tsum tau muab sib xyaw thiab nplawm tusyees raws li qhov piv txwv ua ntej siv.
e. Lub curing ceev yog ceev. Rau cov haujlwm uas xav tau kev tsim kho sai, nws tuaj yeem nyiam.
f. Ntau yam xim thiab qib ntawm cov khoom tuaj yeem ua raws li cov neeg siv khoom xav tau.
g. Kho qhov sib piv ntawm ob lub ntsiab lus, nws kuj tuaj yeem siv los ua cov nplaum lossis cov khoom siv dej tsis zoo.
2, ob-polyurethane muaj pes tsawg leeg:
Polyurethane sealant yog ob hom tshuaj tiv thaiv kab mob, uas muaj ob yam khoom, A thiab B. Cov khoom siv A yog cov xim tsis muaj xim lossis lub teeb daj daj polyurethane prepolymer, thiab Cov Khoom B yog cov tshuaj pleev xim dub lossis kua ua los ntawm kev sib xyaw thiab dehydrating curing agent thiab cov neeg ua hauj lwm pab. Nws tuaj yeem yog non-sagging thiab nws tus kheej-leveling raws li daim ntawv thov. hom. Feem ntau siv hauv cov choj, hauv qab daus, pas dej da dej, tso tsheb hlau luam, dams, tunnels, subways thiab lwm yam dej num.
3: Ob-tivthaiv polyurethane technical indicators as Executive standard: JC482-1992
Cov khoom kuaj
Kev ua tau zoo
Sab nrauv
Pab pawg A
Cov kua dej tsis muaj xim lossis daj daj daj Group B
muab tshuaj dub los yog kua
Lub sijhawm sim, h Ntau dua lossis sib npaug rau 3
Qhov ntom ntom ntau dua lossis sib npaug rau 1.5
Deg lub sij hawm qhuav, h Ntau dua los yog sib npaug rau 48
Tus nqi rov qab, feem pua Ntau dua lossis sib npaug rau 100
Tsawg kub hloov tau (degree) -30
Rheology
Sag (N) hom Tsawg dua lossis sib npaug li 2 hli
Stretch Adhesion
Lub zog tensile siab tshaj plaws, MPa Ntau dua lossis sib npaug rau 0.200
Qhov siab tshaj plaws stretch npaum li cas, feem pua ntau dua los yog sib npaug rau 200
4, ob qho tib si polyurethane siv txoj kev:
1) Kev kho thawj zaug: Siv cov txhuam hlau, cov paj rwb thiab lwm yam cuab yeej los ntxuav cov laitance, plua plav, thiab lwm yam ntawm thawj theem. Yog tias muaj cov roj stain, nws yuav tsum tau txhuam nrog cov organic hnyav. Ua ntej embedded, khaws lub hauv paus nto kom qhuav thiab huv si.
2) Filling gasket khoom: Nws yuav tsum tau sau ua npuas ncauj yas raws li cov khoom siv gasket hauv cov kab noj hniav kom paub meej tias qhov loj me ua tau raws li cov qauv tsim.
3) Embed ob-tivthaiv polyurethane: Raws li qhov piv ntawm cov khoom A: B=1: 1.5, tom qab sib tov tag nrho, ntxiv ib rab phom caulking los yog siv rab riam los ntawm hauv qab mus rau sab saum toj, lossis los ntawm pem hauv ntej mus rau sab nraub qaum. Tag nrho, sim tiv thaiv kev tsim ntawm huab cua npuas thiab qhov; Tom qab lub filling tiav lawm, siv ib rab riam los txhuam tawm ntawm lub tiaj los yog arc nto thiab khawb tawm cov khoom ntim ntau dhau ua ntej lub sealing muab tshuaj txhuam kom qhuav.
4) Txhawm rau kom tau txais kev sib txuas lus zoo dua, cov primer tsim nyog tuaj yeem siv.
5, ob qho tib si polyurethane siv ceev faj:
1) Lub neej lub lauj kaub: Tom qab ob lub ntsiab lus polyurethane A thiab B cov khoom sib xyaw ua ke, cov sib tov maj mam thickens thiab siv tsis tau dhau lub lauj kaub lub neej. Lub ambient kub thaum siv tau muaj txiaj ntsig zoo rau kev kho ntawm lub sealant. Qhov kub siab dua, lub lauj kaub lub neej luv dua. Thaum qhov kub thiab txias qis dhau, qhov kev kho ceev yuav qeeb. Kev tsim kho kub yog 5 degree -35 degree .
2) Thaum siv, qhov dav thiab qhov tob ntawm cov khoom sib khi yuav tsum tsim nyog.
3) Ob lub ntsiab lus polyurethane yuav tsum tau muab cia kom deb ntawm lub hnub ci ncaj qha, thiab yuav tsum muab cia rau hauv qhov chaw txias thiab qhuav, deb ntawm qhov hluav taws kub; kev saib xyuas tshwj xeeb yuav tsum tau them rau lub thawv ntim khoom zoo, uas siv tau rau ib xyoos.
