Adhesive kuchiritsa ndondomeko

Adhesive kuchiritsa ndondomeko

Njira yothetsera:

Kuchiritsa zomatira kumachitika ndi njira zakuthupi, monga evaporation ya solvents, emulsion coagulation ndi kusungunula kuziziritsa, ndi njira zamankhwala.

• (1) Zomatira zotentha zosungunuka: Polima amasungunuka amalimba ndi kuziziritsa atanyowetsa pamwamba kuti amangirire.

(2) Zomatira zothetsera: Pamene zosungunulira zimatuluka nthunzi ndipo ndende ya yankho ikuwonjezeka, imalimba pang'onopang'ono ndipo imakhala ndi mphamvu zinazake.

(3) Emulsion zomatira: Pamene madzi mu emulsion pang'onopang'ono likulowerera mu porous adherend ndi nthunzi, ndi emulsion ndende akupitiriza kuwonjezeka, ndipo potsiriza chifukwa cha mavuto padziko, ndi polima colloidal particles condense. Pamene kutentha kozungulira kuli kwakukulu, emulsion imakhazikika kukhala filimu yomatira mosalekeza, pamene kutentha kozungulira kumakhala kochepa komanso kutentha kwapakati pakupanga filimu (MFT), filimu yonyezimira yoyera imapangidwa. Zomatira za emulsion makamaka ndi polyvinyl acetate ndi ma copolymers ake ndi ma acrylic acid copolymers.

(4) Thermosetting zomatira The multifunctional monomers kapena prepolymers thermosetting resins amakumana polymerization zimachitikira. Pamene kulemera kwa maselo kumawonjezeka, maunyolo a molekyulu amasintha ndi kuwoloka - kugwirizana, kupanga gel osasungunuka kapena kulimba kofunikira. Kutalikitsa nthawi yochiritsa ndi kuonjezera kutentha kwa machiritso mkati mwa mitundu ina sikufanana, ndipo kuchepetsa kutentha kwa machiritso kumakhala kovuta kubwezera mwa kuchulukitsa nthawi. Chifukwa chakuti mankhwala ena amayenera kuchitika pakati pa zomatira ndi pamwamba pa adherend, izi zimafuna kutentha kokwanira kuti apitirize.

Kuchepetsa pressure:

Ndizopindulitsa kuti zomatira zilowerere mokwanira pamwamba; ndi opindulitsa kuchotsa otsika maselo volatiles opangidwa ndi zomatira kuchiritsa anachita; ndizopindulitsa pochotsa zosungunulira zosasunthika zotsalira muzomatira; ndizopindulitsa pakuwongolera makulidwe a zomatira; zomatira zokhala ndi mamasukidwe apamwamba nthawi zambiri zimakhala ndi zomatira zokulirapo, ndipo kusintha kwa mphamvu yamachiritso kumawongolera makulidwe osiyanasiyana a zomatira.

Mukathira guluu, mulole kuti ikhale kwa kanthawi, yomwe imatchedwa pre-curing. Pamene kukhuthala kwa guluu kukuwonjezeka, gwiritsani ntchito kukakamiza kuti muwonetsetse kufanana kwa makulidwe a guluu wosanjikiza.

Kutentha kutentha:

Ngati kutentha kwa machiritso kuli kochepa kwambiri, kachulukidwe ka mtanda-kulumikiza kachulukidwe ka zomatira kumakhala kochepa kwambiri, ndipo kuchiritsa sikukwanira; ngati kutentha kwa machiritso kuli kwakukulu kwambiri, n'zosavuta kuchititsa guluu kutaya kapena kupangitsa kuti zomatira zikhale zowonongeka, zomwe zimapangitsa kuchepa kwa mphamvu zomangira. Kutentha kumathandizira kufalikira kwa mamolekyu pakati pa zomatira ndi zigawo zomangika, zomwe zingathandize kupanga zomangira zamagulu.

(1) Njira yowotchera mwachindunji mu uvuni: Gwiritsani ntchito chipangizo chowuzira mpweya kuti muwonetsetse kutentha kofanana.

(2) Njira yotenthetsera yakunja: Kutentha kumasamutsidwa mwachangu mkati mwa zomatira, kufupikitsa kwambiri nthawi yochiritsa. Akupanga Kutentha njira: Ndi oyenera kutentha kuchiritsa kwa viscoelastic zomatira ndi zosungunulira-free zomatira, koma osati oyenera thermosetting olimba zomatira.