1. Tam sim no domestic ntau lawm muaj peev xwm thiab thov rau hydroxyethyl cellulose
1.1 Khoom Taw Qhia
Hydroxyethyl cellulose (hu ua hydroxyethyl cellulose) yog ib qho tseem ceeb hydroxyalkyl cellulose, uas tau ua tiav los ntawm Hubert hauv xyoo 1920 thiab tseem yog cov dej-soluble cellulose ether nrog cov khoom ntim loj hauv ntiaj teb. Tsuas yog qhov no yog qhov loj tshaj plaws thiab sai sai tsim cov cellulose ether tseem ceeb tom qab CMC thiab HPMC. Hydroxyethyl cellulose yog non-ionic dej-soluble polymer tau los ntawm cov tshuaj ua haujlwm ntawm cov paj rwb refined (los yog ntoo pulp). Nws yog ib qho dawb, tsis muaj ntxhiab, saj tsis muaj hmoov los yog granular khoom.
1.2 Ntiaj teb tsim muaj peev xwm thiab xav tau
Tam sim no, lub ntiaj teb loj tshaj plaws hydroxyethyl cellulose ntau lawm tuam txhab uas muag yog concentrated nyob rau hauv txawv teb chaws. Ntawm lawv, ntau lub tuam txhab xws li Hercules thiab Dow hauv Tebchaws Meskas muaj lub peev xwm ntau lawm, ua raws li United Kingdom, Nyiv, Netherlands, Lub teb chaws Yelemees thiab Russia. Nws yog kwv yees tias lub ntiaj teb no muaj peev xwm ntawm hydroxyethyl cellulose nyob rau hauv 2013 yuav yog 160,000 tons, nrog rau qhov nruab nrab txhua xyoo kev loj hlob ntawm 2.7%.
1.3 Tuam Tshoj lub peev xwm ntau lawm thiab kev thov
Tam sim no, lub peev xwm tsim tawm hauv tsev ntawm hydroxyethyl cellulose yog 13,000 tons. Tsuas yog ob peb lub tuam txhab, cov seem feem ntau yog hloov kho thiab cov khoom sib xyaw ua ke, uas tsis yog hydroxyethyl cellulose hauv qhov tseeb. Lawv feem ntau ntsib cov lag luam thib peb. Hauv tsev ntshiab hydroxyethyl cellulose Cov zis ntawm lub hauv paus cellulose yog tsawg dua 3,000 tons hauv ib xyoos, thiab tam sim no kev lag luam hauv tsev muaj peev xwm yog 10,000 tons hauv ib xyoos, ntawm ntau tshaj 70% yog cov khoom lag luam txawv teb chaws. Lub tuam txhab txawv teb chaws yog Yakuolong Company, Dow Company, Klein Company, AkzoNobel Company; domestic hydroxyethyl cellulose cov khoom lag luam feem ntau suav nrog North Cellulose, Shandong Yinying, Yixing Hongbo, Wuxi Sanyou, Hubei Xiangtai, Yangzhou Zhiwei, thiab lwm yam. sib koom yog nyob los ntawm cov khoom txawv teb chaws. Ib feem ntawm kev lag luam textile, resin thiab number case. Muaj qhov pom tseeb zoo sib txawv ntawm cov khoom siv hauv tsev thiab txawv teb chaws. Kev ua lag luam hauv tsev high-end ntawm hydroxyethyl yog qhov tseem ceeb monopolized los ntawm cov khoom txawv teb chaws, thiab cov khoom siv hauv tsev yog nyob rau hauv nruab nrab thiab qis-kawg lag luam. Siv ua ke los txo kev pheej hmoo.
Qhov kev thov rau hydroxyethyl cellulose kev ua lag luam yog nyob ntawm thaj av, Pearl River Delta (South China) yog thawj zaug; ua raws li Yangtze River Delta (Tsib Suav Sab Hnub Tuaj); thib peb, Southwest thiab North Tuam Tshoj; 12 sab saum toj latex coatings Tsuas yog rau Nippon Paint thiab Zijinhua, uas yog lub hauv paus hauv Shanghai, tus so yog pib nyob rau hauv South China cheeb tsam. Kev faib tawm ntawm cov lag luam tshuaj niaj hnub tseem yog nyob rau hauv South China thiab East China.
Kev txiav txim siab los ntawm cov peev txheej qis qis, cov xim pleev xim yog kev lag luam nrog kev siv ntau tshaj plaws ntawm hydroxyethyl cellulose, ua raws li cov tshuaj niaj hnub, thiab thib peb, roj, thiab lwm yam lag luam haus tsawg heev.
Cov khoom siv hauv tsev thiab kev thov ntawm hydroxyethyl cellulose: tag nrho cov khoom siv thiab kev xav tau sib npaug, cov khoom siv zoo hydroxyethyl cellulose yog me ntsis tawm ntawm cov khoom lag luam, thiab qis-kawg engineering txheej qib hydroxyethyl cellulose, roj av qib hydroxyethyl cellulose, thiab hloov kho hydroxyethyl cellulose yog tsuas yog muab los ntawm cov lag luam hauv tsev. 70% ntawm tag nrho cov domestic hydroxyethyl cellulose ua lag luam yog nyob los ntawm txawv teb chaws high-end hydroxyethyl cellulose.
Khoom thiab kev siv ntawm 2-hydroxyethyl cellulose
2.1 Cov khoom ntawm hydroxyethyl cellulose
Cov khoom tseem ceeb ntawm hydroxyethyl cellulose yog tias nws yog soluble hauv dej txias thiab dej kub, thiab tsis muaj gelling zog. Nws muaj ntau yam kev hloov pauv qib, solubility thiab viscosity. nag lossis daus. Hydroxyethyl cellulose kua tuaj yeem tsim cov yeeb yaj kiab pob tshab, thiab muaj cov yam ntxwv ntawm hom tsis-ionic uas tsis cuam tshuam nrog ions thiab muaj kev sib raug zoo.
① Kub thiab dej solubility: Piv nrog methyl cellulose (MC), uas tsuas yog soluble hauv dej txias, hydroxyethyl cellulose tuaj yeem yaj hauv dej kub lossis dej txias. Ntau yam ntawm solubility thiab viscosity yam ntxwv, thiab tsis-thermal gelation;
②Ntshav tsis kam: Vim nws cov yam tsis-ionic, nws tuaj yeem ua ke nrog lwm cov dej-soluble polymers, surfactants thiab ntsev nyob rau hauv ntau yam. Yog li, piv nrog ionic carboxymethyl cellulose (CMC), hydroxyethyl cellulose muaj ntsev zoo dua.
③ Dej tuav, theem, ua zaj duab xis: nws lub peev xwm tuav dej yog ob npaug ntawm methyl cellulose, nrog kev tswj xyuas zoo heev thiab kev ua yeeb yaj kiab zoo heev, txo cov kua dej tsis zoo, tiv thaiv kev sib deev colloid.
2.2 Siv hydroxyethyl cellulose
Hydroxyethyl cellulose yog ib yam khoom uas tsis yog-ionic dej-soluble cellulose ether, dav siv nyob rau hauv architectural txheej, roj av, polymerization, tshuaj, siv txhua hnub, ntawv thiab number case, fabrics, ceramics, kev tsim kho, kev ua liaj ua teb thiab lwm yam lag luam. Nws muaj lub luag haujlwm ntawm thickening, bonding, emulsifying, dispersing thiab stabilizing, thiab tuaj yeem khaws dej, tsim ib zaj duab xis thiab muab kev tiv thaiv colloid nyhuv. Nws yog yooj yim soluble nyob rau hauv dej txias thiab dej kub, thiab muaj peev xwm muab ib tug tov nrog ntau yam viscosity. Ib qho ntawm cov cellulose ethers sai.
1) Latex xim
Hydroxyethyl cellulose yog feem ntau siv thickener nyob rau hauv latex coatings. Ntxiv nrog rau cov txheej latex thickening, nws tseem tuaj yeem emulsify, disperse, stabilize thiab khaws dej. Nws yog tus cwj pwm los ntawm cov nyhuv thickening zoo kawg li, kev loj hlob xim zoo, cov cuab yeej ua yeeb yaj kiab thiab kev ruaj ntseg cia. Hydroxyethyl cellulose yog ib qho uas tsis yog-ionic cellulose derivative uas yuav siv tau nyob rau hauv ntau yam pH. Nws muaj kev sib raug zoo nrog lwm cov ntaub ntawv hauv cov khoom (xws li pigments, additives, fillers thiab ntsev). Coatings thickened nrog hydroxyethyl cellulose muaj rheology zoo ntawm ntau tus nqi shear thiab yog pseudoplastic. Kev tsim kho xws li txhuam hniav, cov menyuam txheej, thiab tshuaj tsuag tuaj yeem siv tau. Kev tsim kho zoo, tsis yooj yim rau drip, sag thiab txaws, thiab zoo leveling.
Lub sij hawm xa tuaj: Nov-11-2022