Adhesive raw khoom txheej txheem

Borax
Borax kuj muaj nyob rau hauv cov hmoov thiab granular cov ntaub ntawv, nrog nplua-grained borax yog qhov zoo tshaj plaws. Borax tuaj nyob rau hauv ob qib raws li lub zog. Muaj 10 dej molecules hauv 10 moles ntawm borax, uas yog hu ua qib 10 dej borax. Muaj 5 dej molecules hauv 5 moles ntawm borax, uas yog hu ua qib 5 dej borax. 5 moles ntawm borax yog ntau dua concentration. 0.35 kg ntawm 5 moles ntawm borax yog sib npaug rau 0.454 kg ntawm 10 moles ntawm borax. Yog tias tib tus nqi ntawm ob hom borax siv tsis raug, qhov tshwm sim yuav loj heev. Yog hais tias borax ntxiv rau ib qho emulsion ntawm cov hmoov txhuv nplej siab thiab dej thiab qhov sib tov yog rhuab, cov hmoov txhuv nplej siab yuav nthuav dav sai tom qab nqus dej thiab ua kom khov ntau dua li tsis muaj borax.
Muaj qee qhov kev txwv rau tus nqi ntawm borax ntxiv, txwv tsis pub nws yuav cuam tshuam rau kev nthuav dav ntawm cov hmoov txhuv nplej siab, thiab cov gelatinized muab tshuaj txhuam yuav nkig thiab tshwm sim hauv lub xeev powdery thaum qhuav.
Caustic soda tsuas yog yuav tsum muaj 76% sodium oxide thiab yog qib lag luam yam tsis muaj tshuaj ntxiv. Nws tuaj yeem siv rau hauv daim ntawv ntawm crumbs, granules lossis flakes. Cov muaj pes tsawg leeg yog sib npaug rau 98% sodium hydroxide. Caustic soda absorbs noo noo los ntawm huab cua uas txo nws lub zog. Yog li ntawd, yog tias lub thoob ntim khoom puas lawm, nws yuav tsum tsis txhob siv. Tom qab qhib lub hau kom khaws cov ntaub ntawv, lub hau yuav tsum kaw nruj nreem tam sim ntawd.
caustic dej qab zib
Caustic soda yog ib qho muaj zog alkali uas tuaj yeem ua rau kub hnyiab heev rau ntawm daim tawv nqaij hauv nws lub xeev qhuav lossis thaum yaj hauv dej. Hnav lub ntsej muag lub ntsej muag thiab hnab looj tes roj hmab thaum tuav cov dej qab zib caustic, thiab khaws ib lub raj mis ntawm cov kua txiv hmab txiv ntoo rau kev kho mob ntawm daim tawv nqaij uas muaj kab mob caustic soda. Caustic soda yuav haus luam yeeb thaum yaj hauv dej. Tsis txhob nqus cov pa luam yeeb vim nws muaj tshuaj lom.
Caustic soda yog ntxiv rau cov emulsion ntawm cov hmoov txhuv nplej siab thiab dej, thiab qhov sib tov yog rhuab kom txo qhov kub ntawm cov hmoov txhuv nplej siab thiab gelatinizes. Raws li tus yam ntxwv no, tus nqi ntawm caustic soda ntxiv tuaj yeem siv los tswj qhov kub thiab txias ntawm cov hmoov txhuv nplej siab thiab gelatinization. Txawm li cas los xij, kev ntxiv ntau dhau yuav ua rau cov gelatinized particles sib cais, txo cov viscosity, thiab ua rau cov hmoov txhuv nplej siab hauv cov hmoov nplej rau gelatinize ua ntej.
formaldehyde
Formaldehyde yog nyob rau hauv lub xeev ntawm 37% aqueous tov thiab ntsuas raws li lub ntim los yog ntub qhov hnyav teev nyob rau hauv cov mis. Formaldehyde feem ntau yog siv rau hauv cov nplaum rau kev tiv thaiv corrosion. Nws yog siv los ua cov tshuaj sib txuas sib txuas hauv qee cov tshuaj nplaum tsis muaj dej. Koj yuav tsum hnav cov cuab yeej tiv thaiv thaum tuav formaldehyde, vim formaldehyde yog ib qho khaus khaus rau lub qhov muag thiab tawv nqaij, yog li kev nqus pa yuav tsum zam.
dej resistant nplaum
Qhov sib txawv ntawm cov nplaum uas tiv taus dej thiab cov nplaum zoo tib yam yog tias lawv feem ntau muaj cov hmoov txhuv nplej siab ntau dua, cov dej qab ntsev tsawg dua, thiab tsis muaj borax tsawg. Ntawm chav kawm, dej-resistant adhesives ntxiv ib tug npaum li cas ntawm waterproofing neeg sawv cev. Muaj ntau ntau cov tshuaj tiv thaiv dej uas tuaj yeem siv tau, tag nrho cov uas yog dej-soluble resins. Tom qab no hom resin yog chemically cross-linked nrog formaldehyde, nws yuav dhau los ua ib qho nplaum uas yog insoluble hauv dej thiab muaj qee yam dej tsis kam thaum rhuab rau ntawm kab muab tshuaj.
Feem ntau cov dej-resistant adhesives muaj lub neej ntev. Ib txhia maj mam thicken lub sij hawm, txawm nyob rau hauv stirring tej yam kev mob. Qee lub tshuab muaj kev ua haujlwm zoo, tab sis lawv cov dej tsis kam txo qis heev. Yog li ntawd, cov nplaum yuav tsum tau siv sai li sai tau tom qab nws tau npaj.