CMC (carboxymethyl cellulose) muindasitiri yekugadzira mapepa chinhu chakakosha chekuwedzera chinoshandiswa kuvandudza kunaka uye kuita kwepepa. CMC imvura inonyungudika yepolymer musanganiswa ine yakanaka viscosity gadziriso zvivakwa uye inoita basa rakakosha mukugadzira mapepa.
1. Zvinhu zvakakosha zveCMC
CMC inotorwa kubva kune cellulose, iyo inogadzirwa nekuita iyo hydroxyl chikamu che cellulose ine chloroacetic acid. Iyo ine yakanakisa solubility yemvura uye viscosity kugadzirisa kugona. CMC inoumba viscous mhinduro mushure mekunyungudika mumvura, izvo zvinoita kuti ive yakakosha mune akasiyana maindasitiri ekushandisa.
2. Basa reCMC muindasitiri yekugadzira mapepa
Mukugadzira mapepa, CMC inonyanya kushandiswa seanonamira, thickener uye stabilizer. Mabasa ayo anosanganisira:
2.1 Kuvandudza kusimba kwepepa
CMC inogona kunyatso kusimudzira kubatana uye kudhonzerana kwepepa, uye kuvandudza kuramba kubvarura uye kupeta kuramba kwebepa. Maitiro ayo ekuita ndeyekuita kuti bepa riome uye rirambe rakasimba nekusimudzira simba rekubatana pakati pemapulp fibers.
2.2 Kuvandudza kupenya uye kutsvedzerera kwepamusoro kwepepa
Kuwedzera CMC kunogona kuvandudza kunaka kwebepa uye kuita kuti pamusoro pepepa kuve nyore. Inogona kunyatso kuzadza mapeji pamusoro pepepa uye kuderedza kushata kwepamusoro pepepa, nekudaro kuvandudza kupenya uye kudhinda kuchinjika kwepepa.
2.3 Dzora viscosity ye pulp
Munguva yekugadzira mapepa, CMC inogona kunyatso kudzora viscosity yepulp uye ive nechokwadi chekuyerera uye kufanana kwepulp. Yakakodzera viscosity inobatsira kugovera zvakaenzana pulp, kuderedza kukanganiswa kwepepa, uye kunatsiridza kugadzirwa kwakanaka.
2.4 Kuvandudza kuchengetwa kwemvura kwepulp
CMC ine yakanaka kuchengetedza mvura uye inogona kudzikisa kurasikirwa kwemvura ye pulp panguva yekuumbwa. Izvi zvinogona kuderedza shrinkage yepepa uye deformation matambudziko anoitika panguva yekuomeswa, nokudaro kuvandudza kugadzikana kwepepa.
3. Kugadziriswa kweCMC viscosity
Iyo viscosity yeCMC ndiyo yakakosha parameter yemhedzisiro yayo mukuita mapepa. Zvinoenderana neyakasiyana kugadzirwa zvinodiwa, iyo viscosity yeCMC inogona kugadziridzwa nekugadzirisa iko kusungirirwa kwayo uye huremu hwemamorekuru. Zvakananga:
3.1 Mhedzisiro yehuremu hwemamorekuru
Iyo molecular huremu hweCMC ine yakananga mhedzisiro pane yayo viscosity. CMC ine huremu hombe hwemamorekuru kazhinji ine viscosity yepamusoro, saka yakakwira molecular uremu CMC inoshandiswa mumaapplication anoda high viscosity. Yakaderera molecular uremu CMC inokodzera zviitiko zvinoda yakaderera viscosity.
3.2 Mhedzisiro yekugadzirisa kugadzirisa
Iko kusangana kweCMC mhinduro zvakare chinhu chakakosha chinokanganisa viscosity. Kazhinji kutaura, iyo yakanyanya kuwanda kweCMC mhinduro, iyo yakakura viscosity yayo. Naizvozvo, mukugadzirwa chaiko, mhinduro yeCMC inoda kugadziridzwa zvinoenderana nezvinodiwa kuti uwane iyo inodiwa viscosity level.
4. Chengetedzo yekushandiswa kweCMC
Paunenge uchishandisa CMC mukuita mapepa, zvinotevera zvinofanirwa kucherechedzwa:
4.1 Yakarurama reshiyo
Huwandu hweCMC hwakawedzerwa hunofanirwa kugadziridzwa zvinoenderana nezvinodiwa nebepa. Kana yakawandisa yakawedzerwa, inogona kuita kuti pulp viscosity iwedzere uye inokanganisa maitiro ekugadzira; kana isina kukwana, mugumisiro unotarisirwa haugone kuwanikwa.
4.2 Dissolution process control
CMC inoda kunyungudutswa mumvura inotonhora kudzivirira kudzikira panguva yekupisa. Iyo nzira yekumisa inofanirwa kusimudzwa zvizere kuti ive nechokwadi chekuti CMC yanyungudika zvachose uye kudzivirira kusangana.
4.3 Mhedzisiro yepH kukosha
Kuita kweCMC kuchakanganiswa ne pH kukosha. Mukugadzira mapepa, yakakodzera pH renji inofanirwa kuchengetedzwa kuti ive nechokwadi chemhedzisiro yeCMC.
CMC inoita basa rakakosha muindasitiri yekugadzira mapepa, uye kugona kwayo kugadzirisa viscosity kunobata zvakananga kunaka uye kuita kwepepa. Nekusarudza nemazvo nekushandisa CMC, simba, kupenya, kutsvedzerera uye kugona kugadzira kwepepa kunogona kuvandudzwa zvakanyanya. Nekudaro, mukushandisa chaiko, iyo yekumisikidza uye viscosity yeCMC inoda kunyatso gadziridzwa zvinoenderana neyakagadzirwa zvinodiwa kuti ive nechokwadi chekuita kwayo.
Nguva yekutumira: Aug-13-2024