Mhando dzakajairika uye kuiswa kwepurasitiki.

Purasitiki, kureva kuti, rabha repurasitiki, irabha granule inoumbwa nepolymerization yemafuta ekunatsa peturu uye mamwe makemikari zvinhu.Inogadziriswa nevagadziri kuti vagadzire zvigadzirwa zvepurasitiki zvemhando dzakasiyana.

1. Kurongeka kwemapurasitiki: Mushure mekugadzirisa uye kupisa, mapurasitiki anogona kugoverwa mumapoka maviri: thermoplastic uye thermosetting.Zvakajairika ndezvizvi zvinotevera:
1) PVC-polyvinyl chloride
2) PE—polyethylene, HDPE—yakakwirira density polyethylene, LDPE—yakaderera density polyethylene
3) PP-Polypropylene
4) PS-polystyrene
5) Zvimwe zvakajairika kudhinda zvinhu PC, PT, PET, EVA, PU, ​​KOP, Tedolon, nezvimwe.

2. Nyore yekuzivikanwa nzira yemhando dzakasiyana dzemapurasitiki:
Siyanisa zvichienderana nechitarisiko:
1) PVC tepi yakapfava uye ine yakanaka kwazvo extensibility.Pamusoro pezvo, kune zvakare zvimwe zvinhu zvakaoma kana kupupa, senge pombi dzemvura, magonhi anotsvedza, nezvimwe.
2) PS, ABS, yakapfava uye brittle magadzirirwo, kazhinji pamusoro pejekiseni kuumba.
3) HDPE muPE yakareruka mukugadzirwa, yakanaka mukuoma uye opaque, nepo LDPE iri ductile zvishoma.
4) PP ine kumwe kujeka uye ine brittle.

Kusiyanisa maererano nemakemikari ehupfumi:
1) PS, PC uye ABS inogona kunyungudika mu toluene kuti iparadze nzvimbo dzadzo.
2) PVC haina kunyungudika ne benzene, asi inogona kunyungudika ne ketone solvent.
3) PP uye PE vane yakanaka alkali kuramba uye yakanakisa solvent kuramba.

Kusiyanisa maererano nekupisa:
1) Apo PVC inopiswa nemoto, inoparadza kunhuhwirira kweklorini, uye kana moto ukabuda, haungapisi.
2) PE inoburitsa kunhuhwirira kwewakisi kana ichitsva, ine waxy madonhwe, asi PP haizodaro, uye ese ari maviri acharamba achipisa mushure mekusiya moto.

3. Hunhu hwemapurasitiki akasiyana-siyana
1) Hunhu hwePP: Kunyangwe PP iine pachena, magadzirirwo ayo ari nyore kutyora, izvo zviri nani kurongedza chikafu.Zvigadzirwa zvakasiyana zvakasiyana zvinogona kutorwa nekuvandudza kukanganisa kwavo kwekutyoka.Semuyenzaniso: OPP nePP zvinowedzerwa uniaxially kuvandudza simba ravo, iro rinowanzoshandiswa mukurongedza kwekunze kwemapepa matauro uye zvimiti.
2) Hunhu hwePE: PE yakagadzirwa ne ethylene.Kuwanda kweLDPE kunosvika 0.910 g/cm-0.940 g/cm.Nekuda kwekusimba kwayo kwakanyanya uye kugona-kunyorova kugona, inowanzoshandiswa mukurongedza chikafu, cosmetic packaging, nezvimwe;Huwandu hweHDPE hunosvika 0.941 g/cm kana kupfuura.Nekuda kwekureruka kwayo uye kupikisa kupisa, inowanzoshandiswa mumabhegi uye mabhegi akasiyana-siyana.