1. Chidule cha methyl hydroxyethyl cellulose (MHEC)
Methyl hydroxyethyl cellulose (MHEC) ndi ether yopanda ionic cellulose yomwe imapezeka mwa kusintha kwa methylation pamaziko a hydroxyethyl cellulose. Chifukwa cha mawonekedwe ake apadera a mamolekyu, MHEC ili ndi kusungunuka kwabwino, kukhuthala, kumamatira, kupanga mafilimu ndi ntchito zapamtunda, ndipo imagwiritsidwa ntchito kwambiri popaka, zipangizo zomangira, mankhwala a tsiku ndi tsiku ndi zina.
2. Chidule cha zochotsa utoto
Paint strippers ndi mankhwala omwe amagwiritsidwa ntchito pochotsa zokutira pamwamba monga zitsulo, matabwa, ndi mapulasitiki. Zochotsa utoto wamba nthawi zambiri zimadalira zida zosungunulira zankhanza, monga dichloromethane ndi toluene. Ngakhale kuti mankhwalawa ndi othandiza, ali ndi mavuto monga kusinthasintha kwakukulu, kawopsedwe komanso kuopsa kwa chilengedwe. Ndi malamulo akuchulukirachulukira azachilengedwe komanso kuwongolera kwa malo ogwirira ntchito, zochotsa utoto zokhala ndi madzi komanso zopanda poizoni pang'onopang'ono zakhala msika waukulu kwambiri.
3. Njira zogwirira ntchito za MHEC mu zodula utoto
Pazovala zopaka utoto, MHEC imagwira ntchito yofunika kwambiri ngati chowonjezera komanso chosinthira ma rheology:
Kuchulukitsa:
MHEC ili ndi zotsatira zabwino zokometsera pamakina opangira madzi. Posintha kukhuthala kwa chodulira utoto, MHEC imatha kupanga chojambula cha utoto kumamatira pamalo oyimirira kapena opendekera popanda kugwa. Katunduyu ndi wofunikira kwambiri panthawi yopaka utoto chifukwa amalola chodula utoto kuti chikhalebe pamalo omwe mukufuna kwa nthawi yayitali, potero kumapangitsa kuti utoto uwoneke bwino.
Khazikitsani kuyimitsidwa dongosolo:
Paint strippers nthawi zambiri imakhala ndi zinthu zosiyanasiyana zogwira ntchito, zomwe zimatha kukhazikika kapena kukhazikika pakusungidwa. Mwa kupititsa patsogolo mawonekedwe a structural viscosity ya yankho, MHEC ikhoza kuteteza bwino kusungunuka kwa tinthu tating'onoting'ono tolimba, kusunga kugawidwa kwa yunifolomu kwa zosakaniza, ndikuwonetsetsa kuti chojambula chojambula chimagwira ntchito bwino.
Sinthani ma rheological properties:
Kugwiritsiridwa ntchito kwa zojambulajambula kumafuna kuti ikhale ndi makhalidwe abwino a rheological, ndiko kuti, imatha kuyenda bwino pamene mphamvu yakunja ikugwiritsidwa ntchito, koma imatha kuphulika mwamsanga ikaima. Mapangidwe a ma molekyulu a MHEC amapatsa katundu wabwino wometa ubweya wa ubweya, ndiko kuti, pamiyeso yayikulu yometa ubweya, kukhuthala kwa yankho kudzachepa, kupangitsa kuti chojambulacho chikhale chosavuta kugwiritsa ntchito; pamene pamiyeso yotsika yometa ubweya kapena pamalo osasunthika, kukhuthala kwa yankho kumakhala kokwera, komwe kumathandiza kuti zinthuzo zipange zokutira yunifolomu pamalo omwe chandamale.
Limbikitsani kupanga mafilimu:
Panthawi yochotsa utoto, MHEC ikhoza kuthandizira chojambula chojambula kupanga filimu yofananira pamalo omwe akufuna. Kanemayu sangangotalikitsa nthawi yogwira ntchito, komanso kukulitsa luso lophimba la chotupa cha utoto pamlingo wina wake, kuti athe kulowa bwino m'mbali zonse za zokutira.
4. Momwe mungagwiritsire ntchito MHEC muzodula utoto
Kukonzekera kwa amadzimadzi:
MHEC nthawi zambiri imakhalapo mu mawonekedwe a ufa ndipo imayenera kukonzedwa kuti ikhale yankho lamadzi musanagwiritse ntchito. Mchitidwe wamba ndikuwonjezera pang'onopang'ono MHEC m'madzi ogwedezeka kuti apewe kusakanikirana. Tiyenera kukumbukira kuti kusungunuka kwa MHEC kudzakhudzidwa ndi kutentha kwa madzi ndi pH mtengo. Kutentha kwamadzi kwapamwamba (50-60 ℃) kumatha kufulumizitsa kusungunuka kwa MHEC, koma kutentha kwambiri kumakhudza magwiridwe ake a viscosity.
Zophatikizidwa mu paint strippers:
Pokonzekera zodulira utoto, njira yamadzi ya MHEC nthawi zambiri imawonjezedwa pang'onopang'ono kumadzi opangira utoto pogwedezeka. Pofuna kuwonetsetsa kufalikira kwa yunifolomu, kuthamanga kwa MHEC sikuyenera kukhala kofulumira, ndipo kusonkhezera kuyenera kupitilizidwa mpaka yankho lofanana likupezeka. Izi zimafuna kulamulira liwiro logwedeza kuti lisapangidwe thovu.
Kusintha kwa formula:
Kuchuluka kwa MHEC mu zochotsa utoto nthawi zambiri zimasinthidwa molingana ndi chilinganizo chapadera ndi momwe amagwirira ntchito ochotsa utoto. Kuchulukitsa kowonjezereka kuli pakati pa 0.1% -1%. Kuchuluka kwamphamvu kwambiri kumatha kuyambitsa kuyanika kosiyana kapena kukhuthala kopitilira muyeso, pomwe mlingo wosakwanira sungathe kukwaniritsa kukhuthala koyenera komanso mawonekedwe a rheological, chifukwa chake ndikofunikira kukhathamiritsa kugwiritsidwa ntchito kwake poyesera.
5. Ubwino wa MHEC mu zodula utoto
Chitetezo ndi Kuteteza chilengedwe:
Poyerekeza ndi thickeners chikhalidwe, MHEC ndi non-ionic cellulose ether, alibe zinthu poizoni ndi zovulaza, ndi otetezeka kwa thupi la munthu ndi chilengedwe, ndipo ikugwirizana ndi malangizo chitukuko cha chemistry wobiriwira zamakono.
Kukhazikika kwabwino kwambiri: MHEC ili ndi kukhazikika kwamankhwala abwino mumitundu yambiri ya pH (pH 2-12), imatha kukhala yokhazikika yolimba mu machitidwe osiyanasiyana opangira utoto, ndipo sichimasokonezedwa mosavuta ndi zigawo zina mu dongosolo.
Kugwirizana kwabwino: Chifukwa cha chikhalidwe chosakhala cha ionic cha MHEC, chimagwirizana bwino ndi zinthu zambiri zomwe zimagwira ntchito, sizingagwirizane kapena kuyambitsa kusakhazikika kwa dongosolo, ndipo ndizoyenera mitundu yosiyanasiyana ya zojambula zojambula.
Kuchita bwino kwa makulidwe: MHEC imatha kukulitsa kwambiri, potero imachepetsa kuchuluka kwa zokhuthala zina mu chopukusira utoto, kufewetsa fomula ndikuchepetsa mtengo.
Methyl hydroxyethyl cellulose (MHEC) yakhala ikugwiritsidwa ntchito kwambiri muzochotsa utoto zamakono chifukwa chakukhuthala kwake, kukhazikika komanso kugwirizana kwake. Kupyolera mu kupanga ndi kugwiritsira ntchito koyenera, MHEC ikhoza kupititsa patsogolo magwiridwe antchito a ochotsa utoto, kuwapangitsa kuwonetsa bwino kwambiri komanso kuteteza chilengedwe pakugwiritsa ntchito bwino. M'tsogolomu, ndikukula kosalekeza kwaukadaulo wochotsa utoto komanso kupititsa patsogolo zofunikira zachitetezo cha chilengedwe, chiyembekezo chogwiritsa ntchito MHEC pazochotsa utoto chidzakhala chokulirapo.
Nthawi yotumiza: Jun-14-2024