Cellulose ni polsakeride igira elevers zitandukanye. Ubugari bwa Cellulose ni polymes idafite amazi. Amateka yacyo ni maremare, imyaka irenga 30, kandi hariho ubwoko bwinshi. Baracyakoreshwa ahantu hafi ya Latex kandi nimwe nyamukuru kubabyimba. Uburinganire bufite akamaro cyane muri sisitemu yo mu mazi kuko babyibujije amazi. Mu nganda zisize irangi, hakoreshwa ubugari bukoreshwa cyane ni:methyl selile (mc), Hydroxyyeryl selile (hec), Ethyl HydroxyIthyll Cellulose (Ehec), hydroxyPropyl selile (HPC),HydroxyPropyl Methyl Cellulose (HPMC)na hydrophophobwa yahinduwe hydroxyyerthyl selile (HMHEC). HEC ni ugushonga amazi polysacchar yakoreshejwe cyane mubyimbye bya Mat na Semi-gross yubatswe neza. Abariba baboneka mu manota atandukanye na Trickeners hamwe na selile bafite ibara ryiza no gutura neza.
Urwego, anti-splash, gushiraho firime hamwe no kurwanya imitungo ya filime yo gutwikira biterwa nuburemere bwa molecular yaHec. Hec hamwe nabandi badahujwe namazi-polymers babyibujije icyiciro cyamazere yimpute. Ubugari bwa Cellulose burashobora gukoreshwa wenyine cyangwa bafatanye nabandi babyimbye kugirango babone imiterere yihariye. Abashiraho selile barashobora kugira uburemere butandukanye bwa molekile hamwe nicyiciro gito cya stascosity, kuva muburemere bwa molecular. Icyiciro cyo muburemere buke mubisanzwe gikoreshwa nka colloide iri gukingira irangi rya latex polsion, kandi risanzwe ryinshi (victosity 4 800-50 000 MP · s) yakoreshejwe nkabaringa. Uburyo bwo kuri ubu bwoko bwa Thickener buterwa na hydration yo hejuru ya hydrogen hamwe no kwishora hagati yiminyururu ya molecula.
Ubugari gakondo ni uburemere bukomeye bwa moleclar polymer ko kubyimba cyane cyane binyuze mubyifuzo hagati yiminyururu. Kubera ubushyuhe bwinshi ku gipimo cyo hasi, umutungo uringaniye ni umukene, kandi bigira ingaruka kuri firime ya filime. Ku kigero cy'iminsi mikuru, ubushyuhe buri hasi, isuku irwanya film yo gutwikira ni abakene, kandi yuzuye film yo gutwikira ntabwo ari nziza. Ibiranga porogaramu ya Hec, nko guswera Brush, gufata amashusho hamwe na roller, bifitanye isano itaziguye no guhitamo ububi. Kandi kandi imitungo yacyo nko kuringaniza no kurwanya SAG irwanya ahanini igira ingaruka kubabyimba.
Hydrophobwa yahinduwe fililose (HMHEC) ni umubyimba wa selile ufite guhindura hydrophobique kuminyururu imwe y'amashami (amatsinda menshi yumurongo muremure wa alkyl yatangijwe kumunyururu nyamukuru wimiterere). Iyi shitingi ifite ubutwari bwo hejuru hejuru yigiciro cyikigo kinini bityo rero yo gushiraho firime nziza. Nka Natrosol wongeyeho icyiciro cya 330, 331, Amayeri SG-100, Bermocoll Ehm-100. Ingaruka zayo ziragereranywa nubwa selile ether tbikers hamwe na misa nini nini cyane. Itezimbere viscosity no kurinda ICI, kandi bigabanya impagarara hejuru. Kurugero, amakimbirane yubuso bwa hec agera kuri 67 Mn / m, hamwe nubutaka bwa Hmhec ni 55 ~ 65 Mn / m.
Hmhec ifite isura nziza, anti-swagging, kugereranya imitungo, gloss nziza no kurwanya pigment. Birakoreshwa cyane kandi nta ngaruka mbi kuri firime yo gushiraho film ya firime nziza ya latex irangi. Imikorere myiza ya firime no kurwanya ruswa. Uyu mwihariye wibanze wifata akora neza na sisitemu ya Vinyl Acetate ya Copolymer kandi ifite imiterere isa nabandi babyimbaga, ariko hamwe nibintu byoroshye.
Kohereza Igihe: APR-25-2024