HEC mumakampani opanga zokutira

Hydroxyethyl cellulose (HEC)ndi chinthu chofunika kwambiri cha polima chomwe sichimasungunuka m'madzi, chomwe chimakonzedwa pochiza cellulose yachilengedwe ndi alkali ndikuyanjana ndi ethylene oxide. Monga chinthu chogwira ntchito zambiri, chokhuthala kwambiri, chokhazikika komanso chopanga filimu, HEC yakhala ikugwiritsidwa ntchito kwambiri mumakampani opanga zokutira. Makhalidwe ake abwino kwambiri a rheological, kuyanjana bwino kwa biochemical komanso mphamvu zake zokhazikika zimapangitsa kuti ikhale gawo lofunikira kwambiri pakupanga zokutira zamakono.

1. Makhalidwe oyambira a HEC

HEC ili ndi madzi osungunuka bwino ndipo imatha kusungunuka mwachangu m'madzi ozizira kapena otentha kuti ipange yankho lowonekera komanso lokhazikika la colloidal. Kukhuthala kwa yankho lake kumakhudzidwa kwambiri ndi zinthu monga kuchuluka kwa yankho, kutentha, ndi kuchuluka kwa kudulidwa, ndipo imawonetsa machitidwe ofala a pseudoplastic flow (monga, mawonekedwe a kuchepetsedwa kwa kudulidwa). Kuphatikiza apo, HEC ili ndi kukhazikika kwabwino pamlingo waukulu wa pH (2-12), kulekerera kwambiri ma electrolyte, ndipo siiwonongeka mosavuta ndi tizilombo toyambitsa matenda (zosungira nthawi zambiri zimawonjezeredwa kuti ziwonjezere kukhazikika kwa kusungidwa).

Ubwino waukulu wa HEC ndi monga:

Kukhuthala: Kuonjezera kukhuthala kwa dongosolo lopaka utoto ndikuwongolera magwiridwe antchito omanga utoto.

Kuwongolera matenda a rheological: kuwongolera kutsika ndi kusinthasintha kwa utoto.

Kusunga madzi: kuletsa madzi kuti asatuluke msanga panthawi yomanga ndikuwongolera khalidwe la filimu.

Kukhazikika: kusunga kukhazikika kwa fomula pansi pa mikhalidwe yosiyanasiyana yachilengedwe.

Kufalikira: kumathandiza utoto ndi zodzaza kuti zifalikire mofanana ndikuletsa mvula ndi kuyandama.

2. Kugwiritsa ntchito hydroxyethyl cellulose mumakampani opaka utoto

Mu makampani opanga zokutira, makamaka pankhani ya zokutira zochokera m'madzi, HEC imagwiritsidwa ntchito kwambiri, makamaka m'mbali zotsatirazi:

(1) Monga chokhuthala

HEC imatha kuonjezera kukhuthala konse kwa makina ophimba pogwiritsa ntchito madzi ndikupatsa chophimbacho thixotropy yabwino. Kuchuluka koyenera kwa HEC kumatha kuletsa chophimbacho kuti chisagwedezeke panthawi yopaka burashi, kuphimba ndi roller kapena kupopera, komanso kumathandiza kukonza kukwanira ndi kufanana kwa filimu yophimba. Kuphatikiza apo, mphamvu zochepetsera kudulidwa kwa HEC zimawonjezera kusinthasintha kwa chophimbacho pamene mphamvu yakunja ikugwiritsidwa ntchito (monga kupukuta, kupopera), ndipo kukhuthala kumabwezeretsedwanso chikangokhala chokhazikika kuti chisagwedezeke.

(2) Kusintha kwa katundu wa rheological

Kusanthula kwa ukadaulo ndi chimodzi mwa zizindikiro zofunika kwambiri za magwiridwe antchito a chophimba chopangidwa ndi madzi. HEC imasintha kupsinjika kwa zokolola ndi kupindika kwa chophimbacho kuti chikwaniritse kuyenda bwino komanso makhalidwe abwino ofalikira pogwiritsa ntchito njira zosiyanasiyana zomangira. Makamaka mu kapangidwe kolimba kwambiri komanso kokhuthala kwambiri, HEC imatha kupereka mawonekedwe abwino kwambiri omangira ndi kulinganiza, kukonza magwiridwe antchito omangira komanso mtundu wa chophimbacho.

(3) Udindo wokhazikitsa ndi wogawa

Mu kapangidwe ka utoto, kufalikira kokhazikika kwa utoto ndi zodzaza ndikofunikira kwambiri kuti utotowo ukhale wolimba komanso wabwino. HEC imatha kupanga gawo loteteza pamwamba pa tinthu tating'onoting'ono kuti tipewe kusonkhana ndi kutayidwa kwa utoto. Nthawi yomweyo, powonjezera kukhuthala kwa dongosololi, imachepetsanso kuchuluka kwa utoto wa utoto, motero imapangitsa kuti utotowo ukhale wolimba komanso wofanana ndi utoto.

(4) Kukonza bwino momwe madzi amasungira komanso kupanga filimu

HEC ili ndi mphamvu yabwino kwambiri yosungira madzi. Imatha kuletsa madzi kutuluka mofulumira panthawi yomanga, zomwe zimathandiza kufalikira kwa utoto, kupitirira kupanga filimu komanso kukonza bwino ntchito yomaliza yophimba. Makamaka ikagwiritsidwa ntchito pa malo otentha kwambiri, ouma kapena okhala ndi mabowo, HEC imatha kusintha kwambiri mawonekedwe ndi kusalala kwa chophimbacho.

3. Zinthu zazikulu zomwe zimakhudza magwiridwe antchito a HEC

Mu ntchito zinazake, magwiridwe antchito a HEC amakhudzidwa ndi zinthu zotsatirazi:

Mlingo wa kusintha (DS) ndi kusintha kwa molar (MS): DS imayimira chiwerengero cha magulu a hydroxyl omwe amasinthidwa pa gawo lililonse la shuga, ndipo MS imayimira chiwerengero chapakati cha magulu a hydroxyethyl omwe amayambitsidwa pa gawo lililonse la shuga. Kawirikawiri, kuchuluka kwa DS kumakhala kwakukulu, kusungunuka kwa HEC kumakhala bwino; kuchuluka kwa MS kumakhala kwakukulu, kukana kwa mchere komanso kutentha kumakhala bwino.

Kulemera kwa mamolekyulu: Kulemera kwa mamolekyulu kukakhala kwakukulu, mphamvu ya HEC imakula kwambiri, koma nthawi yosungunuka imatalikitsidwanso. Zochitika zosiyanasiyana zogwiritsidwa ntchito (monga zokutira pakhoma, zokutira zamafakitale) zimakhala ndi zofunikira zosiyanasiyana pa kulemera kwa mamolekyulu.

Kukonza pamwamba: Pofuna kukonza kufalikira kwa HEC m'madzi ozizira nthawi yomweyo, zinthu zina za HEC zimakonzedwa pamwamba kuti zisungunuke mwachangu m'madzi ozizira ndikuchepetsa kusonkhana komwe kumachitika panthawi yosungunuka.

4. Zitsanzo za ntchito

Mu zophimba zomangamanga monga utoto wa latex wamkati mwa khoma ndi utoto wakunja wowononga makoma, HEC imagwiritsidwa ntchito ngati chinthu chachikulu chowongolera kukhuthala ndi rheology, chomwe sichimangowonjezera kusalala kwa kapangidwe, komanso chimawonjezera mphamvu yoletsa kugwa ndi kukongoletsa kwa zophimbazo. M'magawo a zophimba zamafakitale, zophimba zamatabwa, inki zosindikizira, ndi zina zotero, HEC imagwiritsidwanso ntchito kwambiri chifukwa cha kukhazikika kwake komanso kugwirizana kwake.

Hydroxyethyl cellulose yakhala chinthu chofunikira kwambiri komanso chofunikira kwambiri pakupanga zophimba zochokera m'madzi chifukwa cha zinthu zake zabwino kwambiri monga kukhuthala, kuwongolera rheology, kusunga madzi ndi kukhazikika kwa kufalikira. Ndi malamulo okhwima okhudza chilengedwe komanso kufunikira kwakukulu kwa zophimba zochokera m'madzi, mwayi wogwiritsa ntchitoHEC mumakampani opanga zokutirazikhala zokulirapo. M'tsogolomu, kupanga zinthu za HEC zomwe zimasungunuka bwino, kukana nyengo bwino komanso kugwira ntchito bwino kudzakhala njira imodzi yofunika kwambiri yopangira zinthu zatsopano mumakampani opanga zokutira.