Sharax:
Waxyaabaha ay ka kooban tahay cuntadaether-yada cellulose
Goobta farsamada:
Hal-abuurkan hadda jira wuxuu la xiriiraa isku-darka cuntada oo ay ku jiraan ether-yada cellulose.
Farsamada asalka ah:
Waxaa muddo dheer la ogaa in ay ku daraan cellulose ethers-ka unugyada cuntada, gaar ahaan isku-dhafka cuntada ee la warshadeeyay, si loo hagaajiyo sifooyin kala duwan sida xasilloonida barafaysan iyo/ama qaab-dhismeedka, ama si loo hagaajiyo adkaanta inta lagu jiro wax soo saarka, si farsamo ahaan loo warshadeeyay ama loo shiilay. Codsiga shatiga Ingiriiska GB 2 444 020 wuxuu shaaca ka qaadayaa isku-dhafka cuntada noocaas ah oo ka kooban cellulose ether nonionic sida methylcellulose, hydroxypropyl cellulose, ama hydroxypropyl methylcellulose. Methylcellulose iyo hydroxypropyl methylcellulose waxay leeyihiin "sifooyin jelling thermos ah oo dib loo rogi karo". Waxaa si gaar ah loogu qeexay marka xal biyood ah oo methylcellulose ah ama hydroxypropyl methylcellulose la kululeeyo, kooxda methoxy-ka hydrophobic ee ku taal molecule-ka ay qallalaan, waxayna noqotaa jel biyood. Dhanka kale, marka jelka ka dhasha la qaboojiyo, kooxaha methoxy-ka hydrophobic-ga ayaa dib loo fuuq-celiyaa, taasoo jelku ku soo laabto xalka biyaha ee asalka ah.
Patent-ka Yurub EP I 171 471 wuxuu shaaca ka qaaday methylcellulose kaas oo aad waxtar ugu leh isku-darka cuntada adag sida khudaarta adag, hilibka, iyo soybean patties sababtoo ah xooggeeda jel ee kordhay. methylcellulose wuxuu bixiyaa adkeysi iyo isku xirnaan wanaagsan oo ku saabsan isku-darka cuntada adag, taasoo siinaysa dareen qaniinyo wanaagsan macaamiisha cunaya isku-darka cuntada la warshadeeyay. Marka lagu milmo biyo qabow (tusaale ahaan, 5°C ama ka hooseeya) ka hor ama ka dib marka lagu qaso maaddooyinka kale ee ku jira isku-darka cuntada, soy-ga methylcellulose wuxuu gaaraa awooddiisa buuxda si uu u bixiyo isku-darka cuntada adag oo leh adkeysi iyo isku xirnaan wanaagsan.
Si kastaba ha ahaatee, xaaladaha qaarkood, isticmaalka biyaha qabow waa mid aan ku habboonayn soo saaraha cuntada. Sidaas darteed, waxaa la jeclaan lahaa in la bixiyo cellulose ethers kuwaas oo bixiya isku-darka cuntada adag oo leh adkeysi wanaagsan iyo isku-xirnaan xitaa marka cellulose ethers lagu milmo biyaha oo leh heerkul qol ah.
Hydroxyalkyl methylcellulose sida hydroxypropyl methylcellulose (oo sidoo kale loo yaqaan inay waxtar u leedahay isku-dhafka cuntada) waxaa la og yahay inay leedahay modulus kaydin hooseeya marka loo eego methylcellulose. Hydroxyalkyl methylcellulose oo muujinaya modulus kaydin hooseeya ma sameeyaan jel xooggan. Xoog sare ayaa looga baahan yahay jeladaha daciifka ah xitaa (Haque, A; Richardson; Morris, ER, Gidley, MJ iyo Caswell, DC ee Carbohydrate Polymers22 (1993) p.175; iyo Haque, A iyo Morris, ER1nCarbohydrate Polymers22 (1993) p.161).
Marka hydroxyalkyl methylcelluloses sida hydroxypropyl methylcellulose (oo muujiya modules kaydin yar) lagu daro isku-dhafka cuntada adag, adkaantooda iyo isku-xirnaantoodu ma aha kuwo ku filan codsiyada qaarkood.
Waa ujeeddada ikhtiraacida hadda jirta si loo bixiyo hydroxyalkyl methylcellulose, gaar ahaan hydroxypropyl methylcellulose, kaas oo la barbar dhigi karo hydroxyalkyl methylcellulose-yada la yaqaan, sida hydroxypropyl methylcellulose. Taas bedelkeeda, isku-dhafka cuntada adag waxaa la siiyaa adkeysi iyo/ama isku-xirnaan wanaagsan.
Shayga la door bidayo ee ikhtiraacida hadda jirta waa in la bixiyo hydroxyalkyl methylcellulose, gaar ahaan hydroxypropyl methylcellulose, kaas oo bixiya isku-darka cuntada adag oo leh adkeysi wanaagsan iyo/ama isku-dhafnaan xitaa marka hydroxyalkyl methylcellulose uu yahay sidaas oo kale marka lagu milmo biyaha heerkulbeegga qolka.
Waxaa la yaab leh, in la ogaaday inhydroxyalkyl methylcellulose, gaar ahaan hydroxypropyl methylcellulose, waxaa loo isticmaali karaa diyaarinta Marka la barbardhigo isku-dhafka cuntada adag, isku-dhafka cuntada adag ee la yaqaan waxay leeyihiin adkaansho iyo/ama isku-xirnaan sare.
Sidoo kale si la yaab leh, waxaa la ogaaday in hydroxyalkyl methylcelluloses gaar ah, gaar ahaan hydroxypropyl methylcellulose, aan loo baahnayn in lagu milmo biyo qabow si ay u bixiyaan isku-darka cuntada adag oo leh adkeysi wanaagsan iyo/ama isku xirnaan.
Waqtiga boostada: Abriil-28-2024