Adhesive curing txheej txheem

Adhesive curing txheej txheem

Txoj kev kho:

Kev kho ntawm cov nplaum yog ua los ntawm kev siv lub cev, xws li evaporation ntawm cov kuab tshuaj, emulsion coagulation thiab yaj txias, thiab cov txheej txheem tshuaj.

• (1) Kub yaj nplaum nplaum: Lub polymer yaj solidifies los ntawm txias tom qab nws ntub dej rau saum npoo yuav tsum tau sib koom.

(2) Cov kua nplaum nplaum: Raws li cov kuab tshuaj evaporates thiab cov tshuaj concentration nce, nws maj mam solidifies thiab muaj qee lub zog.

(3) Emulsion nplaum: Raws li cov dej hauv cov emulsion maj mam nkag mus rau hauv cov ntxeem tau adherend thiab evaporates, cov emulsion concentration tseem nce ntxiv, thiab thaum kawg vim cov nyhuv ntawm qhov nro, cov polymer colloidal hais condense. Thaum lub ambient kub siab, lub emulsion condenses mus rau hauv ib tug nruam adhesive zaj duab xis, thaum lub ambient kub yog tsawg thiab qhov tsawg kawg nkaus film forming kub (MFT), ib tug dawb discontinuous nplaum zaj duab xis yog tsim. Emulsion adhesives feem ntau yog polyvinyl acetate thiab nws cov copolymer thiab acrylic acid copolymer.

(4) Thermosetting adhesives Lub multifunctional monomers los yog prepolymers ntawm thermosetting resins undergo polymerization tshwm sim. Raws li qhov hnyav molecular nce, cov saw hlau molecular hloov thiab hla - txuas, tsim cov gel insoluble lossis yooj yim solidification. Kev ncua lub sijhawm kho thiab ua kom qhov kub thiab txias nyob rau hauv ib qho kev sib txawv tsis sib npaug, thiab txo qis qhov kub thiab txias yog qhov nyuaj rau kev them nyiaj los ntawm kev ncua sij hawm. Vim tias qee yam tshuaj tiv thaiv yuav tsum tshwm sim ntawm cov nplaum thiab qhov chaw ntawm adherend, qhov no yuav tsum muaj qhov kub siab txaus los mus.

Curing siab:

Nws yog qhov zoo rau cov nplaum kom nkag mus rau hauv qhov chaw; Nws yog qhov zoo rau tshem tawm cov tsis tshua muaj molecular volatiles uas ua los ntawm cov nplaum kho cov tshuaj tiv thaiv; Nws yog qhov zoo rau kev tshem tawm cov kuab tshuaj volatile uas tseem tshuav hauv cov nplaum nplaum; nws yog qhov zoo rau kev tswj cov thickness ntawm cov nplaum txheej; adhesives nrog siab viscosity feem ntau muaj thicker nplaum txheej, thiab kev kho ntawm curing siab tswj lub thickness ntau ntawm cov nplaum txheej.

Tom qab siv cov kua nplaum, cia nws zaum rau ib pliag, uas yog hu ua pre-curing. Thaum lub viscosity ntawm cov kua nplaum nce, siv lub siab los xyuas kom meej lub uniformity ntawm lub thickness ntawm cov kua nplaum txheej.

Curing kub:

Yog tias qhov kub thiab txias qis dhau lawm, tus ntoo khaub lig - txuas qhov ntom ntom ntawm cov nplaum txheej yog tsawg dhau, thiab cov tshuaj tiv thaiv kho tsis tiav; Yog hais tias qhov kub thiab txias yog siab dhau, nws yog ib qho yooj yim ua rau cov kua nplaum poob los yog ua rau cov nplaum txheej nkig, ua rau muaj kev sib txuas ntawm lub zog. Cov cua sov yog qhov tsim nyog rau qhov sib txawv ntawm cov molecules ntawm cov nplaum thiab cov khoom sib txuas, uas tuaj yeem pab tsim cov tshuaj lom neeg.

(1) Txoj kev cua sov ncaj qha rau hauv qhov cub: Siv lub tshuab cua tshuab kom ntseeg tau tias muaj cua sov hloov pauv.

(2) Cov txheej txheem cua sov sab nraud: Cov cua sov tau xa mus rau sab hauv ntawm cov nplaum nplaum, ua rau lub sijhawm kho kom luv. Ultrasonic cua sov txoj kev: Nws yog tsim rau kev kho cua sov ntawm viscoelastic adhesives thiab hnyav - dawb adhesives, tab sis tsis haum rau thermosetting rigid adhesives.