Focus on Cellulose ethers

Nigute ushobora guhitamo umubyimba ukwiye

Ubwoko bwimbuto hamwe nibiranga

Ibibyimba bya selile bifite ubushobozi bwo kubyimba cyane, cyane cyane kubyimbye byamazi; bafite imbogamizi nke kubijyanye no gutwikira kandi bikoreshwa cyane; zirashobora gukoreshwa muburyo butandukanye bwa pH. Nubwo bimeze bityo ariko, hari ibibi nko kuringaniza nabi, gusenyuka cyane mugihe cyo gutwikisha uruziga, guhagarara nabi, no kwanduzwa na mikorobe. Kuberako ifite ubukonje buke munsi yimisatsi miremire hamwe nubukonje bwinshi munsi yumutambiko uhagaze kandi muke, ubwiza bwiyongera vuba nyuma yo gutwikira, bishobora kwirinda kugabanuka, ariko kurundi ruhande, bitera kuringaniza nabi. Ubushakashatsi bwerekanye ko uko uburemere bwa molekuline bugereranije bwiyongera, ikwirakwizwa ryirangi rya latex naryo ryiyongera. Ibibyimba bya selile bikunda kumeneka kubera ubwinshi bwa molekile nini. Kandi kubera ko selile ari hydrophilique, bizagabanya kurwanya amazi ya firime.

umubyimba wa selile

Umubyimba wa acide polyacrylic ufite umubyimba ukomeye kandi uringaniza, hamwe nibinyabuzima bihamye, ariko byumva pH kandi bifite amazi mabi.

umubyimba wa polyacrylic

Imiterere ifatika ya polyurethane yibyimbye isenywa hifashishijwe imbaraga zogosha, kandi ubukonje buragabanuka. Iyo imbaraga zo gukata zabuze, ibishishwa birashobora kugarurwa, bishobora gukumira ibintu bya sag mubikorwa byo kubaka. Kandi gukira kwayo kwifata bifite hystereze runaka, bifasha kuringaniza firime. Ubwinshi bwa molekuline igereranije (ibihumbi kugeza ku bihumbi) bya polyurethane yibyibushye biri munsi cyane ugereranije na misile igereranije (ibihumbi magana kugeza kuri miriyoni) yubwoko bubiri bwa mbere bwibibyimba, kandi ntibizateza imbere kumeneka. Molekile ya polyurethane yibyibushye ifite amatsinda ya hydrophilique na hydrophobique, kandi amatsinda ya hydrophobique afitanye isano ikomeye na matrix ya firime ya coating, ishobora kongera imbaraga zo kurwanya amazi ya firime.


Igihe cyo kohereza: Werurwe-24-2023
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