Zvigadzirwa zvePVC zvinoshandiswa zvakanyanya muhupenyu hwezuva nezuva, asi zvinogona zvakare kuve nematambudziko panguva yekushandiswa.Nhasi, mugadziri weSainuo wakisi ye polyethyleneichakutora iwe kuti udzidze nezve dambudziko rekuchena kwePVC zvigadzirwa.

Kana zvigadzirwa zvePVC zvikafumurwa kupisa kunze, nekuda kwehunyoro, kabhoni dhaidhiyodhi, sulfur dioxide, uye chiedza mumhepo, zvinoratidzira kuchena chiitiko, kunyanya nekuda kwezvikonzero zvitatu zvinotevera:
1. Kuchena mushure mekunyudzwa mumvura
Mhando dzakawanda dzezvakajeka PVC zvigadzirwa zvinoratidza chena haze kutaridzika kana yasangana nemvura kana chipfunga kwenguva refu.Zvigadzirwa zvakapfava zvine simba kupfuura zvakaoma.Nekuda kwekunyudzwa kwemvura, plasticizers, stabilizers, etc. precipitate kubva kuPVC and undergo hydration, ichiita hydrated precipitates pamusoro (inokanganisa kujeka).Kunyange kana mvura yakanyorova yaenda, plasticizers uye stabilizers haigoni kudzorerwa kune yavo yepakutanga.Chete nekuwedzera tembiricha inogona kuenderana pakati peplasticizers uye stabilizers inogona kudzoserwa isati yave pachena.
2. Kuchena mushure mekusangana nechiedza chezuva
Zvigadzirwa zvePVC zvakafumurwa kuchiedza chezuva kunze zvinogonawo kuratidza kuchena nekuda kwemhedzisiro yehunyoro, kabhoni dhaikisaidhi, sulfur dioxide, uye chiedza mumhepo.Izvi zvinoenderana nekuenderana kwema stabilizers.Mune sipo dzesimbi, mabenzoate anoenderana zvakanaka nePVC anoratidza kuchena kushoma pane stearates.Organic tin haisi nyore kuchena, uye sulfur-ine organic tin ndiyo yakanyanya kunaka, inoteverwa nelauric acid munyu uye maleate munyu.Kuwedzera zvigadziriso zvemwenje, phosphite esters, mvura inoumbwa inodzikamisa, nezvimwe zvinogona kudzivirira kana kuderedza kuchena kwePVC kunokonzerwa nekuratidzwa kwezuva.

Zvigadzirwa zvePVC zvakaoma zvinoshanduka zvichena mushure mekuratidzwa muFlorida kana dzimwe nzvimbo dzakanyorova, asi hazvirambe zvakachena kana zvafumurwa muArizona.Saka, humidity mamiriro anosimudzira kuchena kwePVC nekuratidzwa nechiedza chezuva.
3. Stress whitening
Stress whitening inoreva chiitiko chekuchena munzvimbo dzemuno dzePVC zvigadzirwa, sekukotama, creases, uye nzvimbo dzakatambanudzwa, pasi pechiito chemagetsi ekunze masimba.
Izvi zvinogona kunge zviri nekuda kwekuchinja kwemamolecular chimiro kunokonzerwa nekunze kwesimba, kutaridzika kwepolymer molecular chain, shanduko yePVC density, uye kutaridzika kwemavoid pakati pemamwe mamorekuru kuita kupararira kwechiedza, izvo zvinoita kuti zvigadzirwa zvePVC zvioneke zvichena.

4. Kumwe kuchena
Munguva yekugadziriswa kwePVC inoonekera zvigadzirwa, kana yakawandisa yerubricant ikashandiswa, yakawanda lubricant precipitates inogonawo kukonzera kuti zvigadzirwa zvinoonekera kuburitsa chena turbidity, iyo dzimwe nguva inodaidzwa sekuchena.
Kuchena uku kunowanzo konzera wakisi iri pachena senge zvinhu zviri pamusoro pechigadzirwa.Mhinduro ndeyekudzikisa huwandu hwemafuta anoshandiswa kana kushandura kune lubricant nekuenderana zvirinani, kuitira kuti uwane chiyero pakati pekuzora kwemukati nekunze kweformula.
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