HPMC yo Gufata Amashusho

HPMC yaGufata firime nubuhanga bwo gukora firime yoroheje ya polymer hejuru yimyiteguro ihamye. Kurugero, igice cyibikoresho bya polymer bihamye byatewe kimwe hejuru yurupapuro rusanzwe ukoresheje uburyo bwo gutera uburyo bwo gukora firime ya plastike ya microne nyinshi, kugirango ugere ku ngaruka wifuza. Ihinduka ryuru rupapuro rwa firime hanze yikibaho ni uko ibinini bimwe byubahiriza ibikoresho bya polymer nyuma yo kunyura ahantu hateye, hanyuma bikakira igice gikurikira cyibikoresho byo gutwika nyuma yo kumisha. Nyuma yo gufatira hamwe no gukama inshuro nyinshi, igifuniko kirarangira kugeza ubuso bwose bwimyiteguro bwuzuye. Gufata firime ni firime ikomeza, uburebure ahanini buri hagati ya microne 8 kugeza 100, urwego runaka rwa elastique kandi rworoshye, rukomera cyane hejuru yimbere.

Mu 1954, Abbott yakoze icyiciro cya mbere cyamabati ya firime aboneka mubucuruzi, kuva icyo gihe, hamwe nogukomeza kunoza no gutunganya ibikoresho byikoranabuhanga n’ikoranabuhanga, ibikoresho bya firime ya polymer byasohotse, ku buryo ikoranabuhanga ryo gutwikira firime ryatejwe imbere byihuse. Ntabwo gusa ubwoko, ubwinshi nubwiza bwibikoresho byo gutwika amabara byiyongereye byihuse, ariko kandi ubwoko, imiterere nibiranga tekinoroji yo gutwikira, ibikoresho byo gutwikira hamwe na firime yo gutwika kimwe no gutwika ibinini bya TCM byatejwe imbere cyane. Kubwibyo, ikoreshwa rya tekinoroji yo gutwika firime ryabaye nkenerwa niterambere ryimishinga yimiti kugirango izamure ibicuruzwa.

Gukoresha hakiri kare muma firime yerekana ibikoresho, haracyari umubare munini wibicuruzwa ukoresheje HPMChydroxypropyl methylcellulosenk'ibikoresho bya Membrane. NukwezwaHPMCselile ikomoka kumpamba cyangwa ibiti, hamwe na sodium hydroxide yumuti kugirango bigaragaze kubyimba kwa alkali selile, hanyuma hamwe na chloromethane hamwe na okiside ya propylene kugirango ubone methyl hydroxypropyl selulose etherHPMC, ibicuruzwa kugirango bikureho umwanda nyuma yo kumisha, kumenagura, gupakira. Mubisanzwe, ubukonje buke HPMC ikoreshwa nkafirimeibikoresho byo gutwikira, na 2% ~ 10% igisubizo gikoreshwa nkigisubizo. Ikibi nuko viscosity ari nini cyane kandi kwaguka birakomeye.

Igisekuru cya kabiri cyibikoresho bya firime ni inzoga za polyvinyl (PVA). Inzoga ya polyvinyl ikorwa na alcoholysis ya polyvinyl acetate. Inzoga zisubiramo Vinyl ntizishobora gukoreshwa nka reaction kuko zidahuye nubunini nubuziranenge bukenewe kuri polymerisation. Muri methanol, Ethanol cyangwa Ethanol na methyl acetate ivanze n'umuti wa alkali cyangwa acide organique nka catalizator, hydrolysis irihuta.

PVA ikoreshwa cyane mugutwikira firime. Kubera ko idashonga mumazi mubushyuhe bwicyumba, muri rusange isizwe hamwe no gukwirakwiza amazi hafi 20%. Imyuka y'amazi hamwe na ogisijeni ya PVA iri munsi ya HPMC na EC, bityo ubushobozi bwo guhagarika imyuka y'amazi na ogisijeni birakomeye, bishobora kurinda neza intangiriro ya chip.

Plastiseri bivuga ibikoresho bishobora kongera plastike yibikoresho bikora firime. Ibikoresho bimwe byerekana firime bihindura imiterere yumubiri nyuma yubushyuhe bugabanutse, kandi kugenda kwa macromolecules bigenda biba bito, bigatuma igifuniko gikomera kandi kikavunika, kikaba kidahinduka, bityo kikaba cyoroshye kumeneka. Plastiseri yongeweho kugirango igabanye ubushyuhe bwikirahure (Tg) no kongera ubworoherane. Amashanyarazi akoreshwa cyane ni amorphous polymers ifite uburemere buke bwa molekile kandi ifitanye isano ikomeye nibikoresho bikora firime. Amashanyarazi adashobora gushonga afasha kugabanya uburyo bwo gutwikira, bityo bikongerera ituze imyiteguro.

Muri rusange abantu bemeza ko uburyo bwa plastiseri ari uko molekile ya plastike yinjizwa mumurongo wa polymer, ikabuza imikoranire ya molekile ya polymer kurwego runini. Imikoranire iroroshye mugihe imikoranire ya polymer-plastike ikomeye kuruta imikoranire ya polymer-plastike. Rero, amahirwe kubice bya polymer yimuka ariyongera.

Igisekuru cya gatatu cyibikoresho bya firime ni plasitike hakoreshejwe uburyo bwa chimique yashizwe muri firime ikora polymer polymer

Kurugero, THE firime yubuhanga ikora ibikoresho Kollicoat® IR yatangijwe na BASF nuko PEG yashizwe mumiti kumurongo muremure wa polymer PVA utongeyeho plastike, bityo irashobora kwirinda kwimuka kwikiyaga nyuma yo gutwikira