Ukusetshenziswa kwe-HPMC ezintini zethayela kanye nodaka lwesimende

I-Hydroxypropyl methylcellulose (HPMC)iyi-non-ionic cellulose ether. Isetshenziswa kabanzi emkhakheni wezinto zokwakha ngenxa yokuncibilika kwayo emanzini okuhle, ukuqina, ukugcinwa kwamanzi kanye nezakhiwo zokubopha, ikakhulukazi kuma-adhesive ethayela kanye nodaka lukasimende. I-HPMC ayigcini nje ngokuthuthukisa ukusebenza kokwakhiwa kwezinto, kodwa futhi ithuthukisa izakhiwo zayo zomshini kanye nokuqina. Iyisengezo se-polymer esibalulekile kudaka lwanamuhla oluxutshwe nolomile.

1. Ukusetshenziswa kwe-HPMC ezintini zokunamathisela zethayela

I-adhesive yethayela iyinto eguquliwe esekelwe kusimende esetshenziselwa ngokukhethekile ukubeka amathayela namatshe. Ukusetshenziswa kwe-HPMC kubonakala kakhulu kulezi zici ezilandelayo:

1.1. Thuthukisa ukusebenza kokwakha

I-HPMC ingathuthukisa ngempumelelo isikhathi sokuthambisa kanye nokusebenza kwezinamathelisi zamathayili, okwenza kube lula ukuklwebha nokusebenzisa izinto ngokulinganayo, futhi ithuthukise ukusebenza kahle kokwakhiwa. Ikakhulukazi ezindaweni ezishisayo nezomile, i-HPMC enokugcinwa kwamanzi okuqinile ingalibazisa ukuhwamuka kwamanzi futhi igweme ukoma ngokweqile okuholela ekubophweni okubuthakathaka.

1.2. Ukugcinwa kwamanzi okuthuthukisiwe

I-HPMC esezingeni eliphezulu inamandla okugcina amanzi kahle, okuvumela ukuthi usimende ugcwale amanzi futhi uthuthukise amandla okubopha kwe-glue. Ngesikhathi esifanayo, ukugcinwa kwamanzi kunganciphisa nezinkinga zekhwalithi njengokugoba nokuwa.

1.3. Ukusebenza okuthuthukisiwe kokungasheleli

Uma kubekwa amathayili phezulu, i-HPMC inganciphisa ngempumelelo ukushelela kwamathayili ngokulungisa ukuhambisana kwezinto kanye ne-thixotropy, ithuthukise ukuphepha kokusebenza kanye nekhwalithi yokubekwa.

1.4. Isikhathi sokuvula esithuthukisiwe kanye nesikhathi sokulungisa

I-HPMC ingandisa isikhathi sokuvula (okungukuthi isikhathi sokubeka amathayili ngemva kokufaka) kanye nesikhathi sokulungisa (isikhathi sokulungisa indawo yamathayili) kwe-adhesive yethayili, ithuthukise ukuguquguquka kanye nokubekezelela amaphutha okwakhiwa.

2. Ukusetshenziswa kwe-HPMC kusimende sikasimende

Udaka lukasimende lusetshenziswa kabanzi ekuxhumaneni kokwakha njengokwakha ngamatshe, ukuplasta kanye nokubeka phansi. Ngemva kokwengeza i-HPMC, ukusebenza kodaka lukasimende kuthuthukiswe kakhulu:

2.1. Ukugcinwa kwamanzi okuthuthukisiwe kakhulu

Ku-mortar yendabuko yesamente, amanzi angena kalula esisekelweni noma aphele ngaphambi kwesikhathi, okwenza i-mortar yome futhi iqhekeke futhi ingabi namanzi kahle. I-HPMC ingavala umswakama, iqinisekise ukuthi i-mortar inomswakama owanele wokusabela kokumanzisa ngaphambi kokuba iqine, ngaleyo ndlela ithuthukise amandla ayo okugcina.

2.2. Thuthukisa ukusebenza kahle kanye nokusebenza kahle

I-HPMC ithuthukisa ukuthamba kanye nokuvumelana kwe-mortar, okwenza kube lula ukuyisabalalisa futhi ibushelelezi, inciphise amathuba okuhlukaniswa noma ukuhlukanisa, futhi ithuthukisa umuzwa kanye nekhwalithi yokwakha.

2.3. Thuthukisa ukumelana nokuqhekeka

Njengoba i-HPMC ithuthukisa ukugcinwa kwamanzi, ukumuncwa kwesimende kuphelele, futhi izinkinga zokuqhekeka ezibangelwa ukuncibilika zincishiswa kakhulu, okusiza ekuthuthukiseni ukuqina kanye nokuqina kwengqimba yesamente.

2.4. Yandisa isikhathi sokwakha

Ezindaweni ezinokushisa okuphezulu noma ezomiswe ngomoya, i-mortar evamile kulula kakhulu ukulahlekelwa amanzi nokuqina. I-HPMC ingandisa kakhulu isikhathi esisebenzayo futhi ithuthukise ukusebenza kahle kokwakha, ikakhulukazi emisebenzini emikhulu.

3. Inani lokwengeza le-HPMC kanye nezinyathelo zokusebenzisa

Inani elinconywayo lokwengeza le-HPMC ngokuvamile lingu-0.1% ~ 0.5% wesisindo sikasimende, kodwa kufanele lilungiswe ngendlela eguquguqukayo ngokwefomula yomkhiqizo kanye nezidingo zokwakha. Ukwengeza okuningi kakhulu kungabangela ukuthi udaka lube lukhuni futhi kunciphise ukugeleza; okuncane kakhulu ngeke kudlale indima yokugcina amanzi kanye nokuqina.

Uma ukhetha i-HPMC, kufanele kucatshangelwe imingcele elandelayo:

Ukuthamba: Uma i-viscosity iphakeme, ukugcinwa kwamanzi kuqina futhi ukusebenza kokwakhiwa kungcono, kodwa kungathinta ukugeleza kwamanzi;

Usayizi wezinhlayiya kanye nokuncibilika kwazo: Kunconywa ukusebenzisa imikhiqizo esheshayo ukuze kube lula ukusabalala okufanayo kodaka oluxutshwe nowomile;

Okuqukethwe komlotha kanye nobumsulwa: I-HPMC esezingeni eliphezulu kufanele ibe nokuqukethwe komlotha okuphansi kanye nobumsulwa obukhulu ukuze kuncishiswe umthelela ekumanzisweni kwesimende.

Njengesengezo se-polymer esisebenza kahle kakhulu, i-HPMC isibe yisithako esibalulekile ekwakhiweni kwezinamathiseli zamathayili kanye nodaka lukasimende. Inikeza ukwesekwa okuqinile kokwenziwa ngcono kokusebenza kwezinto zokwakha zesimanje ngokuthuthukisa ukugcinwa kwamanzi, ukuthuthukisa ukusebenza kokwakhiwa, kanye nokuthuthukisa ukunamathela. Ngokuthuthuka kwezakhiwo eziluhlaza kanye nokwakhiwa kwezimboni esikhathini esizayo,amathuba okusetshenziswa kwe-HPMC azoba maningiUkukhetha uhlobo olufanele kanye nenani le-HPMC kuyisihluthulelo sokuthuthukisa ukusebenza kwezinamathelisi zamathayili kanye nemikhiqizo yodaka lwesimende.