(1) Sumo
Hydroxypropyl methylcellulose (HPMC) is water-soluble cellulose ether inoshandiswa zvakanyanya mu latex pendi. Inogona kukanganisa zvakanyanya rheological properties, sag resistance uye kutsetseka kwepamusoro kwelatex pendi. Nekudaro, mumashandisirwo anoshanda, iwo ekutanga zvimiro zveHPMC chete anogona kunge asina kukwana kuzadzisa zvese zvinodikanwa zvekugara, saka matanho chaiwo anofanira kutorwa kuti avandudze kusimba kwayo mulatex pendi.
(2) Mechanism yekuita kweHPMC
HPMC inovandudza kusimba uye kuoma kwefirimu repende nekugadzira network network mupende yelatex. Iine akati wandei akakosha mabasa:
Kuvandudza rheological zvivakwa: HPMC inogona kugadzirisa viscosity yependi yelatex, inopa kuita kwakakodzera kwekuvaka, uye kuderedza sagging.
Vandudza zvimiro zvekupfekedza: inogona kugovera zvakaenzana pigment uye mafirita kuti ive nechokwadi chekufanana uye kutsetseka kwepamusoro kwefirimu repende.
Wedzera zvimiro zvekugadzira firimu: HPMC inogona kusanganisa nemamorekuru emvura kubatsira fomu rependi firimu uye kuchengetedza kuoma kwayo uye simba.
(3) Zvinhu zvinokanganisa kusimba kweHPMC
Kana uchivandudza kusimba kweHPMC mune latex pendi, zvinotevera zvinhu zvinofanirwa kutariswa:
Hunhu hweHPMC: Yepamusoro-mhando HPMC inogona kupa yakagadzikana makemikari zvivakwa uye yakasimba kuramba kudzikisira.
Crack kuramba kwefirimu rependi: Kupokana kweiyo firimu rependi kunoenderana nehuremu hwemamorekuru uye kutsiva dhigirii reHPMC, rinokanganisa kugona kwayo kuyambuka-kubatanidza uye kusanganisa nezvimwe zvinhu.
Mamiriro ezvakatipoteredza: Zvinhu zvezvakatipoteredza zvakaita semwaranzi yeultraviolet, humidity, uye tembiricha zvine chekuita nekushanda kweHPMC. Inokodzera HPMC mhando dzinofanirwa kusarudzwa kuti dzitarise matambudziko enzvimbo dzakasiyana.
(4) Matanho ekuvandudza kusimba kweHPMC
1. Gadzirisa chimiro chemakemikari cheHPMC
Kusarudza HPMC ine dhigirii yakakodzera yekutsiva kunogona kuvandudza kugadzikana kwayo uye kusimba mufirimu repende. Kazhinji, HPMC ine yakakwira dhigirii yekutsiva iri nani inoshingirira kune hydrolysis uye kusvibiswa kweUV. Uye zvakare, kugadzirisa huremu hwemamorekuru eHPMC kunogona kukanganisawo rheological zvimiro uye firimu-kugadzira zvimiro mulatex pendi.
2. Kugadziridza fomu
Nekugadzirisa zvine musoro fomula yependi yelatex, kushanda kweHPMC kunogona kukwidziridzwa:
Shandisa zvakakodzera firimu-kuumba additives: Kuwedzera firimu-forming additives yakadai se ethylene glycol kana propylene glycol inogona kuwedzera kushanduka kweHPMC mufirimu yepende uye kuderedza ngozi yekuputika.
Kuwedzera ma-cross-linking agents: Cross-linking agents anogona kusimudzira kusungirirwa kwepolymer cheni panguva yekuumbwa kwefirimu repende, nokudaro achivandudza simba remuchina uye kusimba kwefirimu repende.
Kushandiswa kwezvigadzika: Kuwedzera antioxidants uye UV zvinotora zvinogona kuderedza kuderedzwa kweiyo HPMC nemafirimu ekupenda uye kuwedzera hupenyu hwavo hwesevhisi.
3. Kuvandudza teknolojia yekuvaka
Kuvandudza nzira yekuvaka yepende ye latex inogonawo kukanganisa zvakanyanya kusimba kwayo:
Yakakodzera Paint Firimu Hukobvu: Kuve nechokwadi chekuti yunifomu yepende yefirimu ukobvu kunoderedza mukana wekuputsika kwefirimu uye kutsemuka.
Kudzora kwenzvimbo yekuvaka: Kudzora humidity uye tembiricha munzvimbo yekuvaka inogona kuderedza kushushikana panguva yekurapa firimu repende, nekudaro ichivandudza kusimba kwayo.
4. Multi-layer coating
Kushandisa multi-layer coating process kunogona kuwedzera kusimba kwependi yelatex. Nguva yekuomeswa yakakwana inodiwa pakati pejasi rega rega repende kuve nechokwadi chekurapa kwakakwana uye kusungirirwa kwefirimu repende.
5. Shandisa yakaoma cellulose ethers
Nekubatanidza HPMC nemamwe ma cellulose ethers akadai secarboxymethylcellulose (CMC), zvinhu zvinopindirana zvinogona kuwanikwa, nekudaro zvichivandudza kusimba kwependi yelatex. Complex cellulose ethers inogona kupa zvirinani rheological zvimiro uye kuoma kwefirimu.
Kuvandudza kusimba kweHPMC mupendi yelatex ibasa rakazara rinoda optimization kubva kune akawanda maficha senge chimiro chemakemikari, kugadziridza fomula, uye tekinoroji yekuvaka. Iko kusanganiswa kwehupamhi hwepamusoro HPMC, zviwedzere zvakakodzera uye nzira dzekuvaka dzinonzwisisika dzinogona kuvandudza zvakanyanya kusimba kwependi yelatex, ichiibvumira kuchengetedza kuita kwakanaka uye kutaridzika munzvimbo dzakasiyana dzakaoma.
Nguva yekutumira: Jul-04-2024