Izvo zvinhu zviviri zvakagadzirwa nechinhu chimwe chete, asi zviyero zvezvinhu zvakasiyana, iyo yakaumbwa yakapfava kune rumwe rutivi uye yakaoma kune imwe.
PVC plastic bag
Ruvara rwechisikigo rwakaita yellowish translucent uye kupenya.Kujeka kuri nani pane polyethylene uye polypropylene, asi zvishoma pane polystyrene.Zvichienderana nehuwandu hwekuwedzera, inogona kukamurwa kuita yakapfava uye yakaoma polyvinyl chloride.Zvigadzirwa zvakapfava zvine kuchinjika, kusimba uye kunamatira.Kuoma kwezvinhu zvakaoma ndeye polyethylene yakaderera-density, asi kana yakaderera kupfuura polypropylene, kuchena kuchaitika pamabhendi.Zvigadzirwa zvakajairika: mahwendefa, mapaipi, soles, matoyi, magonhi nemahwindo, waya sheaths, stationery, etc. I polymer zvinhu zvinoshandisa maatomu eklorini pane maatomu ehydrogen mu polyethylene.
Kemikari uye Zvenyama Zvivakwa zvePVC (Polyvinyl Chloride) Yakaoma PVC ndechimwe chezvinhu zvakanyanya kushandiswa zvepurasitiki zvinhu.PVC zvinhu ndeye amorphous zvinhu.Mukushandiswa chaiko kwezvinhu zvePVC, zvinosimbisa, mafuta ekuzora, ebetsero marapirwo, pigment, impactors uye zvimwe zvinowedzera zvinowanzowedzerwa [2].
PVC zvinhu hazvibatike, yakasimba, inoshingirira mamiriro ekunze uye ine yakanakisa geometric kugadzikana.PVC inopikisa zvakanyanya kune oxidizing agents, kuderedza maajenti uye yakasimba acids.Nekudaro, inogona kuve yakasvibiswa neyakaomeswa oxidizing asidhi yakadai seyakaomeswa sulfuric acid uye yakadzika nitric acid, uye haina kukodzera kusangana neanonhuhwirira kana chlorinated hydrocarbons.
Iyo yekunyunguduka tembiricha yePVC panguva yekugadziriswa ndiyo yakakosha maitiro parameter.Kana iyi parameter isina kukodzera, matambudziko ekuora kwezvinhu achaitika.Kuyerera kwePVC kwakashata uye maitiro ayo akasiyana akamanikana.Low molecular uremu PVC zvinhu zvinowanzo shandiswa, kunyanya nekuti yakakwira molecular uremu PVC zvinhu zvakaoma kugadzirisa (iyi mhando yezvinhu kazhinji inoda kuwedzerwa kwemafuta ekuvandudza kuyerera zvivakwa).Iyo shrinkage rate yePVC yakaderera zvakanyanya, kazhinji 0.2-0.6%.
Nguva yekutumira: Oct-20-2021
