Kurapa kweUV ndeye ultraviolet kurapa, UV ndiko kupfupikiswa kweultraviolet UV mwaranzi ultraviolet, kurapa kunoreva maitiro ekushandura zvinhu kubva pakaderera mamorekuru kuenda kumapolima. Kurapa kweUV kunowanzo reva mamiriro ekurapa kana zvinodiwa zvekupotera (pendi), ingi, zvinonamira (glues) kana zvimwe zvisimbiso zvepoto zvinoda kurapwa ne ultraviolet mwenje, iyo yakasiyana nekupisa kupisa, kurapa kweanonamira (anorapa). kurapwa kwepanyama, nezvimwewo.
Mumunda wemakemikari mapolymers, UV inoshandiswawo sechidimbu chekurapa kwemwaranzi, UV, kureva, UV ultraviolet kurapa, iko kushandiswa kweUV ultraviolet mwenje wepakati uye pfupi wave (300-800 nm) pasi pe UV mwaranzi, fluid UV. zvinhu zviri mufotoinitiator zvinokurudzirwa kuita mahara radicals kana cations, zvichibva zvakonzera iyo polymer zvinhu (resin) ine inoshanda inoshanda mapoka polymerization kuita isinganyunguke uye isiri-kunyunguduka yakasimba coating. firimu, tekinoroji nyowani yekuchengetedzwa kwezvakatipoteredza uye yakaderera VOC emissions inobuda mu60s yezana ramakore rechi20. Mushure memakore makumi masere ezana remakore rechi20, China yakabudirira nokukurumidza.
Iwo oligomers ane yakakwira viscosity, uye kuitira kufambisa kuvaka uye kuvandudza kukurumidza kurapa kwekuyambuka, zvinodikanwa kuwedzera monomers seanogadzirisa diluents kugadzirisa rheology yeresin. Chimiro cheiyo reactive diluent ine simba rakakosha pazvinhu zveiyo yekupedzisira yekuputira firimu senge kuyerera, kutsvedza, kunyorova, kuzvimba, shrinkage, adhesion uye kutama mukati meiyo firimu rekuvhara. Reactive diluents inogona kuva monofunctional kana multifunctional, iyo yekupedzisira iri nani nekuti inovandudza crosslinking pakurapa. Izvo zvinodikanwa zvekuita zveiyo reactive diluent ndezvi, kugona kunyungudika, kunyungudika, kunhuwa, kugona kudzikisa viscosity yepakati, kushata, kushanda, kushushikana kwepasi, shrinkage panguva yepolymerization, tembiricha yegirazi (Tg) yehomopolymer, pesvedzero pane zvese. kurapa nekukurumidza uye chepfu. Iyo monomer inoshandiswa inofanira kunge iri monomer inogumbura paganda uye iyo yakakosha isingapfuuri 3 sekutsanangurwa kwaDraize. Iyo yakajairika monomer inoshandiswa se reactive diluent ndeye tripropylene glycol diacrylate (TPGDA).
Inokurumidza polymerization reverse application mumakemikari mashandiro eUV kurapa anonyatso kuwanikwa nekugadzira emahara radical reactions pasi peakakodzera mafotoinitiators uye / kana photosensitizers uye yakakwirira-inoshanda mwenje mamiriro. Photoinitiators inogadzira mahara radicals uye cationic intermediates inogona kushandiswa. Nekudaro, muindasitiri yemazuva ano, yekutanga inowanzo kuve neruvara (kureva, photoinitiator inogona kuburitsa mahara radicals).
Parizvino, iyo inonyanya kushandiswa ultraviolet wavelengths ndeye 365nm, 253.7nm, 185nm, nezvimwe zvinhu zvinosanganisira kuomeswa pakarepo, kushandiswa kwemari shoma, kuvandudzwa kwehutano, kuderedza nzvimbo yekuchengetedza, yakachena uye inoshanda. Simba remwenje rinoshandiswa rinowanzopfuura 1000W, richishandisa ultraviolet UVA UVC, zvichingodaro, iyo UVC inoshandisa mamwe marambi amalgam.
Nguva yekutumira: Oct-19-2022