Ndezvipi zvinhu zvezvigadzirwa zvepurasitiki?
Zvigadzirwa zvepurasitiki zvinonyanya kukamurwa kuita mhando mbiri dze thermoplastic uye thermosetting, inotevera sumo yakadzama, ndinovimba kubatsira.
1. Thermoplastic
Thermoplastics, inozivikanwawo se thermoplastic resins, ndiyo chikamu chikuru chepurasitiki.Iwo akagadzirwa neyakagadzirwa polymer zvinhu zvinogona kuyerera kune mumwe nemumwe nekunyunguduka nekupisa uye vanokwanisa kurapa zvakare.Izvi zvinhu zvinowanzove nehupamhi hwema molecular huremu uye zvine inodzokorodza mamorekuru cheni chimiro.Thermoplastics inogona kugadziriswa nekuumba jekiseni, extrusion, blow molding, calendering uye mamwe maitiro ekugadzira zvikamu uye zvigadzirwa zvemhando dzakasiyana uye saizi.
(1) Polyethylene (PE) : PE ndeimwe yemapurasitiki akajairika, anoshandiswa zvakanyanya mukurongedza, mapaipi, waya insulators uye zvimwe zvinangwa.Zvinoenderana neyakaomesesa chimiro uye density, PE inogona kukamurwa kuita yakakwira density polyethylene (HDPE), yakaderera density polyethylene (LDPE) uye mutsara yakaderera density polyethylene (LLDPE).
Polypropylene (PP): PP zvakare ipurasitiki yakajairika, inowanzoshandiswa mumidziyo, mabhodhoro, uye michina yekurapa.PP ipurasitiki yehafu-crystalline, saka yakasimba uye yakajeka kupfuura PE.
(3) Polyvinyl chloride (PVC) : PVC ndeimwe yepasi rose kugadzirwa kwemapurasitiki, anoshandiswa zvakanyanya mukuvaka zvinhu, waya insulators, kurongedza uye zvigadzirwa zvekurapa nezvimwe minda.PVC inogona kuve neruvara uye inoshingirira kumakemikari mazhinji.
(4) Polystyrene (PS) : PS inowanzoshandiswa kugadzira zvinhu zvisingaremi, zvakajeka zvekutakura, zvakadai semidziyo yezvokudya uye mabhokisi ekuchengetedza.PS inoshandiswawo zvakanyanya kugadzira furo, senge EPS furo.
Acrylonitrile-butadiene-styrene copolymer (ABS) : ABS ipurasitiki yakaoma, isingachinjiki inowanzoshandiswa kugadzira mibato yemidziyo, dzimba dzemagetsi, uye zvikamu zvemotokari.
(6) Vamwe: Mukuwedzera, kune mamwe marudzi akawanda e thermoplastics, akadai se polyamide (PA), polycarbonate (PC), polyformaldehyde (POM), polytetrafluoroethylene (PTFE) nezvimwe zvakadaro.
2, thermosetting plastiki
Thermosetting mapurasitiki ikirasi yakakosha yemapurasitiki, akasiyana ne thermoplastics.Zvinhu izvi hazvipfavi uye zvinoyerera kana zvichipisa, asi zvinoporeswa nekupisa.Thermosetting mapurasitiki anowanzo ane simba repamusoro uye kuoma uye akakodzera maapplication anoda kusimba kukuru uye simba.
Epoxy resin (EP): Epoxy resin ipurasitiki yakaoma thermosetting inoshandiswa zvakanyanya mukuvaka, zvemagetsi uye maindasitiri emotokari.Epoxy resins inogona kuita makemikari nezvimwe zvinhu kuti zvigadzire zvinonamira zvine simba uye machira.
(2) Polyimide (PI): Polyimide ipurasitiki inodzivirira kupisa inogona kuchengetedza zvinhu zvayo pakupisa kwakanyanya.Inoshandiswa zvakanyanya muaerospace, zvemagetsi uye maindasitiri emotokari kugadzira yakakwirira-yekushisa inodzivirira zvikamu uye machira.
(3) Vamwe: Mukuwedzera, kune mamwe marudzi akawanda e thermosetting mapurasitiki, akadai se phenolic resin, furan resin, polyester isina unsaturated uye zvichingodaro.
Nguva yekutumira: Zvita-07-2023