Izinhlobo nezici ze-Thickener
Ama-cellullosic thickeners anekhono eliphezulu lokujiya, ikakhulukazi ukuqina kwesigaba samanzi; banemikhawulo emincane ekwakhiweni kwe-coating futhi isetshenziswa kabanzi; zingasetshenziswa kuhlu olubanzi lwe-pH. Kodwa-ke, kukhona okungalungile njengokungalinganisi kahle, ukuchaphazeka okwengeziwe ngesikhathi sokumbozwa kwama-roller, ukungasimami kahle, kanye nokungenwa kalula yi-microbial. Ngenxa yokuthi ine-viscosity ephansi ngaphansi kwe-shear ephezulu kanye ne-viscosity ephezulu ngaphansi kwe-shear emile futhi ephansi, i-viscosity ikhula ngokushesha ngemva kokumbozwa, okungavimbela ukuwohloka, kodwa ngakolunye uhlangothi, kubangela izinga eliphansi. Ucwaningo luye lwabonisa ukuthi njengoba isisindo samangqamuzana esilinganisiwe se-thickener sikhula, ukuchithwa kopende we-latex nakho kuyanda. Ama-cellullosic thickeners athambekele ekuchaphazeni ngenxa yesisindo sawo esikhulu samangqamuzana. Futhi ngenxa yokuthi i-cellulose i-hydrophilic eyengeziwe, izonciphisa ukumelana kwamanzi kwefilimu kapende.
i-cellulosic thickener
Ama-polyacrylic acid thickeners anezakhiwo eziqinile zokujiya nokubeka izinga, kanye nokuzinza okuhle kwebhayoloji, kodwa azwela ku-pH futhi awakwazi ukumelana namanzi.
i-polyacrylic thickener
Isakhiwo esihlangene se-associative polyurethane thickener sibhujiswa ngaphansi kwesenzo se-shear force, futhi i-viscosity iyancipha. Lapho amandla e-shear ephela, i-viscosity ingabuyiselwa, engavimbela ukwenzeka kwe-sag ohlelweni lokwakha. Futhi ukubuyiswa kwayo kwe-viscosity kune-hysteresis ethile, ehambisana nokulingana kwefilimu yokugqoka. Isisindo samangqamuzana esihlobene (izinkulungwane kuya emashumini ezinkulungwane) zamangqamuzana e-polyurethane aphansi kakhulu kunesisindo samangqamuzana ahlobene (amakhulu ezinkulungwane kuya ezigidini) wezinhlobo ezimbili zokuqala zokujiya, futhi ngeke akhuthaze ukuchafaza. Ama-molecule e-polyurethane thickener anawo womabili amaqembu e-hydrophilic kanye ne-hydrophobic, futhi amaqembu e-hydrophobic anobudlelwane obuqinile ne-matrix yefilimu yokumboza, engathuthukisa ukumelana kwamanzi kwefilimu yokuhlanganisa.
Isikhathi sokuthumela: Mar-24-2023