PVC plastiki inogadzirwa kubva kuacetylene gasi uye hydrogen chloride, uyezve polymerized.Mukutanga kwema1950, yakabudiswa neacetylene carbide nzira, uye mukupera kwema1950, yakashandura nzira ye ethylene oxidation ine zvinhu zvakakwana zvakasvibiswa uye mari shoma;Parizvino, inopfuura 80% yePVC resin munyika inogadzirwa nenzira iyi.Nekudaro, mushure me2003, nekuda kwekukwira kwemutengo wemafuta, mutengo weacetylene carbide nzira yaive yakaderera ne10% pane iyo ethylene oxidation nzira, saka iyo synthesis process yePVC yakatendeukira kune acetylene carbide nzira.
PVC plastiki inopolymerized ne liquid vinyl chloride monomer (VCM) kuburikidza nekumiswa, lotion, yakawanda kana mhinduro yekugadzirisa.Iyo yekumisikidza polymerization maitiro yanga iri nzira huru yekugadzira PVC resin ine yakakura kugadzirwa maitiro, nyore kushanda, yakaderera mutengo wekugadzira, akawanda echigadzirwa mhando uye yakafara application renji.Inotora chikamu che90% chePVC yepasi rose yekugadzira zvidyarwa (homopolymer inoverengera inosvika makumi mapfumbamwe muzana epasi rose rePVC kubuda).Chechipiri inzira ye lotion, iyo inoshandiswa kugadzira PVC paste resin.Iyo polymerization reaction inotangwa nemahara radicals, uye maitiro tembiricha anowanzo 40 ~ 70oc.Iko kuita tembiricha uye kusungirirwa kwekutanga kune pesvedzero huru pachiyero chepolymerization uye kugovera kwema molecular uremu hwePVC resin.
Peta resipi sarudzo
Nzira yePVC plastiki profile inonyanya kuumbwa nePVC resin uye zvinowedzera, izvo zvakakamurwa kuva: kupisa stabilizer, lubricant, processing modifier, impact modifier, filler, anti-aging agent, colorant, etc. Tisati tagadzira PVC formula, tinofanira kutanga. kunzwisisa kushanda kwePVC resin uye zvakasiyana-siyana zvinowedzera.
1. Resin ichave pvc-sc5 resin kana pvc-sg4 resin, kureva, PVC resin ine polymerization degree ye1200-1000.
2. Thermal stability system inofanira kuwedzerwa.Sarudza zvinoenderana nezvinodiwa chaizvo zvekugadzira, uye teerera kune iyo synergistic mhedzisiro uye antagonistic mhedzisiro pakati pezvitsiga zvekupisa.
3. Impact modifier inofanira kuwedzerwa.CPE uye ACR maitiro ekugadzirisa anogona kusarudzwa.Zvinoenderana nezvimwe zvikamu muformula uye iyo plasticizing kugona kweiyo extruder, iyo yekuwedzera mari ndeye 8-12 zvikamu.CPE ine mutengo wakaderera uye huwandu hwakawanda hwezvinyorwa;ACR ine yakakwirira kuchembera kuramba uye fillet simba.
4. Wedzera chiyero chakakodzera murubrication system.Iyo lubrication system inogona kuderedza mutoro wekugadzira michina uye kuita kuti chigadzirwa chiite mushe, asi kuwandisa kunokonzeresa kusimba kweweld fillet kuderera.
5. Kuwedzera kugadzirisa kugadzirisa kunogona kuvandudza kunaka kweplasticizing uye kunatsiridza kutaridzika kwezvigadzirwa.Kazhinji, ACR kugadzirisa modifier inowedzerwa muhuwandu hwe1-2 zvikamu.
6. Kuwedzera filler kunogona kuderedza mutengo uye kuwedzera kuomarara kweiyo profil, asi ine simba guru pane yakaderera-tembiricha kukanganisa simba.Reactive light calcium carbonate ine high fineness inofanira kuwedzerwa, pamwe nehuwandu hwekuwedzera hwezvikamu 5-15.
7. Imwe chiyero chetitanium dioxide inofanira kuwedzerwa kudzivirira ultraviolet mwaranzi.Titanium dioxide inofanira kuva rutile rudzi, pamwe nekuwedzera kwezvikamu zve 4-6.Kana zvichidikanwa, ultraviolet absorbers UV-531, uv327, nezvimwewo inogona kuwedzerwa kuwedzera kuchembera kweprofile.
8. Kuwedzera bhuruu uye fluorescent kupenya muhuwandu hwakakodzera kunogona kuvandudza zvakanyanya ruvara rweprofile.
9. Mushonga unofanirwa kurerutswa kusvika pazvinobvira, uye zvinowedzerwa zvemvura hazvifanirwe kuwedzerwa zvakanyanya sezvinobvira.Zvinoenderana nezvinodiwa zvekusanganisa maitiro (ona dambudziko rekusanganisa), iyo fomula inofanirwa kukamurwa kuita zvinhu I, zvinhu II uye zvinhu III mumabheji zvinoenderana nekutevedzana kwekudyisa, uye kurongedza zvakateerana.
Yakapetwa kuturika polymerization
Suspension polymerization inochengeta madonhwe emvura emuviri mumwe akamiswa mumvura nekuenderera mberi achikurudzira, uye iyo polymerization reaction inoitwa mumadonhwe madiki emonomer.Kazhinji, kumiswa kwepolymerization ndeyepakati pe polymerization.
Mumakore achangopfuura, makambani akaenderera mberi achidzidza nekuvandudza fomula, polymerizer, chigadzirwa chakasiyana uye mhando yepakati kumiswa polymerization process yePVC resin, uye vakagadzira matekinoroji ane hunhu hwavo.Parizvino, kambani yeGeon (yaimbova kambani yeBF Goodrich) tekinoroji, tekinoroji yekambani yeshinyue muJapan uye tekinoroji yekambani yeEVC muEurope ndiyo inoshandiswa zvakanyanya.Tekinoroji yemakambani matatu aya inokwana makumi maviri nerimwe muzana yenyika itsva yePVC yekugadzira resin kubva 1990.
Nguva yekutumira: Jul-15-2022