Mukurongedza kudhinda, iyo yekumashure ruvara inowanzodhindwa kutanga kuti iwedzere kunaka kwepateni yekushongedza uye kutevedzera yakawedzera kukosha kwechigadzirwa. Mukushanda kwekuita, zvakaonekwa kuti kutevedzana uku kwekudhinda kunoda kuita inki crystallization. Chii chiri chikonzero cheizvi?
1, Kuti uwane kupenya uye kupenya kumashure, iyo inki layer inowanzodhindwa gobvu kana kudhindwa kamwechete kana nekuwedzera kudhindwa kwekudhinda, uye mamwe mafuta akaoma anowedzerwa panguva yekudhinda. Kunyange zvazvo ingi layer inovhara zvachose mutakuri wekudhinda, kukurumidza kuomeswa kunoguma kune yakanyanya kutsetseka inki firimu repamusoro pamusoro peingi yekudhinda mushure mekuumbwa kwefirimu, zvichiita kuti zviome kudhindisa zvakanaka, segirazi. Izvi zvinoita kuti ingi idhindwe zvisina kuenzana kana kusakwanisa kudhinda zvachose. Iyo ingi yemafuta yakadhindwa pabutiro (stack) inopa bead senge kana isina kusimba mavara ekudhinda mapatani pabhesi ruvara, uye ingi yekubatanidza haina kunaka, imwe yacho inogona kutodzimwa. Indasitiri yekudhinda inoreva iyo seinki firimu crystallization, vitrification, kana mirrorization.
Kuti uvandudze kujeka kwechifananidzo uye zvinyorwa zvemavara, vagadziri vazhinji vakawedzera mafuta esilicone kune inki masisitimu mumakore achangopfuura. Nekudaro, yakawandisa silicone mafuta kazhinji inokonzeresa shrinkage yeingi firimu.
Ikozvino kune akati wandei maonero akasiyana pamusoro pezvikonzero zvekristaro yemafirimu einki. Zvinoenderana neiyo crystallization theory, crystallization inzira yekugadzira makristasi kubva mumvura (mvura kana kunyungudika) kana gasi nyika. Chinhu chine kunyungudika kunodzikira zvakanyanya nekudzikira tembiricha, uye mhinduro yacho inogona kusvika pakuzara uye kupenya kuburikidza nekutonhodza; Chinhu chine kunyungudika kwacho kunodzikira zvishoma nekudzikira tembiricha, chinopenya kana zvimwe zvinonyungudutsa zvabuda zvobva zvatonhodza. Vamwe vanhu vanotenda kuti crystallization yekurongedza kudhinda mifananidzo uye zvinyorwa (inki film layer) inonzi recrystallization... Iyo inodhinda inki film system inoumbwa ne solvent evaporation (evaporation) uyezve kutonhora, inozivikanwawo serecrystallization.
2, Vamwe vanhu vanotenda kuti crystallization (crystallization) yekurongedza ingi yekudhinda inonyanya kukonzerwa nekristalllization ye pigment muinki system.
Isu tinoziva kuti kana pigment makristasi ari anisotropic, yavo yekristaro mamiriro etsono kana tsvimbo yakafanana. Paunenge uchigadzira inki firimu, kureba kutungamira kunorongedzwa zviri nyore pamwe nekuyerera kweiyo resin (yekubatanidza zvinhu) muhurongwa, zvichikonzera shrinkage yakakosha; Nekudaro, hapana kurongeka kwekutungamira panguva yespherical crystallization, zvichikonzera kuderera kudiki. Inorganic pigments mumapakiti ekudhinda inki masisitimu anowanzo ane spherical crystals, senge cadmium based packaging printing inki, iyo zvakare ine diki shrinkage (crystallization).
Iyo particle size inokanganisawo kuumba shrinkage rate uye molding shrinkage ratio. Kana iyo pigment particles yakakura kana idiki kune imwe nhanho, iyo molding shrinkage rate uye shrinkage ratio ndiyo idiki. Kune rimwe divi, resin ane makristasi akakura uye maumbirwo akatenderedzwa anoratidza diki kuumbwa kuderera, nepo resin ane makristasi makuru uye asina kutenderera maumbirwo anoratidza shrinkage yakakura yekuumbwa.
Muchidimbu, kungave kusanganisa kusanganisa kwemavara emavara kana kuwedzera kusanganiswa kwechiedza cheruvara, iko kushandiswa kwepigment hakunei nechimiro chazvo chemakemikari, asiwo zvakanyanya zvinoenderana nehunhu hwavo hwemuviri, senge crystal particle size distribution. condensation phenomena, yakasimba mhinduro, uye zvimwe zvinofurira zvinhu; Isu tinofanirawo kuita ongororo yakanaka yezvakanakira nekuipira kwezvose zviri zviviri inorganic uye organic pigments, kuitira kuti zvivepo, uye yekupedzisira inobata chinzvimbo chekutanga.
Paunosarudza kurongedza inki yekudhinda (pigment), inofanirwawo kufunga nezvesimba rayo rekupenda (iyo yakanakisa kupararira, iyo yakakwirira simba rekupenda, asi kune muganho kukosha kupfuura iyo simba rekupenda richadzikira) Kuvhara simba (iyo inonyudza maitiro. ye pigment pachayo, musiyano we refractive index pakati pe pigment ne resin binder inodiwa kuti ipende, saizi ye pigment particles, crystal form of the pigment, uye ma molecular structure symmetry ye pigment yakakwirira kudarika iya ye symmetrical. fomu yakaderera yekristaro).
Simba rekuvhara kwechimiro chekristalline chikuru kudarika chechimiro chetsvimbo, uye simba rekuvhara kwemavara ane crystallinity yakakwirira yakakura kudarika yepigments ine yakaderera crystallinity. Naizvozvo, iyo yakakura yekuvharira simba rekurongedza kudhinda inki firimu, zvakanyanya mukana wekutadza kwegirazi. Kupikiswa kwekupisa, kuramba kwekufamba, kuramba kwemamiriro ekunze, kunyungudika kunyungudika, uye kudyidzana nemapolymers (resin muoiri inki masisitimu) kana zvinowedzerwa hazvigone kurerutswa.
3, Vamwe vashandisi vanotenda kuti kusarudzwa kwakashata kunogona kukonzera kukanganisa kwekristalllization. Imhaka yekuti iyo inki yepasi inoomesa zvakanyanya (kunyatso), zvichikonzera kudzikira kwesimba remahara. Parizvino, kana nguva yekuchengetedza mushure meimwe ruvara rwekudhinda yakareba, tembiricha yewekishopu yakakwira zvakanyanya, kana kune yakawandisa kudhinda inki desiccants, kunyanya cobalt desiccants, kana nekukurumidza uye kwakanyanya kuomesa nzira, sekuomesa, inoshandiswa, crystallization phenomenon. zvichaitika.
Nguva yekutumira: Nov-22-2023
