Nokukura zvishoma nezvishoma kwenguva, upenyu hwevanhu hwakachinja zvikuru, uye kushandiswa kwezvinhu zvitsva kwakasiyana-siyana kwawedzera kupararira. Somuenzaniso, PVC uyeEVAzvinhu zvinonyanya kushandiswa zvakanyanya muhupenyu hwanhasi, asi vanhu vazhinji vanozvivhiringidza nyore. . Tevere, ngatinzwisise mutsauko uripo pakati pePVC neEVA zvinhu.
1. Chitarisiko uye magadzirirwo akasiyana:
PVC iri kumahombekombe eChina inogona kukamurwa kuita marudzi maviri: yakaderera-chepfu uye ine hushamwari kwezvakatipoteredza uye isiri-chepfu uye ine hushamwari. EVA zvinhu zvese zvakatipoteredza zvine hushamwari zvinhu. Nzvimbo yeEva yakanyorova; kusimba kwayo kwakasimba kupfuura kwePVC, uye inonzwa yakanamatira (asi hapana guruu pamusoro pepamusoro); iyo chena uye yakajeka, uye yakajeka Yakakwirira, inonzwa uye inonzwa yakafanana zvikuru nePVC firimu, saka kuchenjerera kunofanira kubhadharwa kusiyanisa.
2. Maitiro akasiyana:
PVC is thermoplastic resin polymerized nevinyl chloride pasi pechiito chemutangi. Ndiyo homopolymer yevinyl chloride. Vinyl chloride homopolymer uye vinyl chloride copolymer zvakabatanidzwa zvinonzi vinyl chloride resin. PVC yaimbove yaigadzirwa zvakanyanya-chinangwa mapurasitiki pasi rose uye yaishandiswa zvakanyanya. Iyo molecular formula yeEva (ethylene vinyl acetate copolymer) iC6H10O2 uye uremu hwayo hwemamorekuru i114.1424. Ichi chinyorwa chinoshandiswa seakasiyana siyana emafirimu, furo zvigadzirwa, zvinopisa zvinonyungudusa zvinonamatira uye polymer modifiers.
3. Kupfava kwakasiyana uye kuoma: Rudzi rwechisikigo rwePVC rushoma yero, rinopenya uye rinopenya. Kujeka kuri nani pane polyethylene uye polystyrene, asi yakaipisisa kupfuura polystyrene. Zvichienderana nehuwandu hwekuwedzera, inokamurwa kuita yakapfava uye yakaoma polyvinyl chloride. Zvigadzirwa zvakapfava zvinochinjika uye zvakaoma uye zvinonamira, nepo zvigadzirwa zvakaomarara zvine kuomarara kwepamusoro pane yakaderera-density polyethylene. , uye yakaderera pane polypropylene, kuchena kuchaitika pane inflection point. EVA (ethylene vinyl acetate copolymer) yakapfava kupfuura PVC.
4. Mitengo yakasiyana:
PVC zvinhu: Mutengo patani uri pakati pe6,000 ne7,000 yuan. EVA zvinhu zvine ukobvu hwakasiyana nemitengo. Mutengo unenge 2,000/cubic mita.
5. Hunhu hwakasiyana:
PVC ine yakanaka magetsi ekudzivirira zvivakwa, inogona kushandiswa seyakaderera-frequency insulation material, uye kugadzikana kwayo kwemakemikari kwakanakawo. Nekuda kwekusagadzikana kwekupisa kwepolyvinyl chloride, kupisa kwenguva refu kunokonzera kuora, kuburitswa kweHCl gasi, uye kushanduka kwepolyvinyl chloride. Naizvozvo, huwandu hwayo hwekushandisa hwakatetepa, uye tembiricha yekushandisa kazhinji iri pakati -15 ne55 madhigirii. EVA yakasimba pakudziya kwekamuri. Kana ichipisa, inonyunguduka kune imwe nhanho uye inova mvura inogona kuyerera uye ine imwe viscosity.
Nguva yekutumira: Jun-10-2024