Indlela yokukhetha nokuthenga

Xa uthenga ifilimu yokutya okanye iplastiki, qiniseka ukuba ukhangele igama elithile okanye ukwakhiwa kweekhemikhali, kwaye uqaphele ukuba imveliso inegama lesiNgesi kuphela kwaye akukho logo yaseTshayina.Kwakhona, qiniseka ukuba ukhetha iimveliso eziphawulwe ngamagama athi "ukutya".

Kukho iintlobo ezimbini eziphambili zefilimu yokutya: i-polyethylene (PE) kunye ne-polypropylene (PP).Umahluko wexabiso phakathi kweemveliso ezimbini awukho mkhulu, kodwa i-polypropylene (PP) ingcono ekumiseni ukungena kwegrisi.

Xa kuthengwa ifilimu yokutya, kucetyiswa kuqala ukuba uthenge ifilimu ye-self-adhesive cling eyenziwe nge-polyethylene (PE), ngakumbi xa kuziwa ekugcinweni kwenyama, iziqhamo, njl., kuba i-PE iyona nto ikhuselekileyo ngokubhekiselele kukhuseleko.Ubomi obude beshelufu, i-polyvinyl chloride (PVDC) iyacetyiswa kuba ineempawu ezingcono zokugcina ukufuma kwaye inobomi obude beshelufu kwiindidi ezintathu zefilimu yokutya.Ifilimu yokuncamathela yePolyvinyl chloride (PVC) ikwalukhetho lwabantu abaninzi ngenxa yokungafihli kakuhle kwayo, i-viscosity, ukunwebeka kunye nexabiso eliphantsi, kodwa kufuneka kuqatshelwe ukuba ayinakusetyenziselwa ukugcina ukutya okunamafutha kuba yintlaka eyenziwe ngepolyvinyl chloride. i-resin, i-plasticizer kunye ne-antioxidant, yona ngokwayo ayinayo ityhefu.Nangona kunjalo, i-plasticizers kunye ne-antioxidants ezongeziweyo ziyityhefu.Iiplasticizers ezisetyenziswe kwiPVC yeplastiki yokusetyenziswa kwansuku zonke ziyi-dibutyl terephthalate kunye ne-dioctyl phthalate, eziyimichiza enetyhefu.Oku kunempembelelo eyonakalisayo kakhulu kwinkqubo ye-endocrine yomntu kwaye inokuphazamisa i-hormone metabolism yomzimba.I-Lead stearate, i-polyvinyl chloride antioxidant, nayo iyityhefu.Iimveliso ze-PVC eziqulethe i-oxidant yetyuwa ekhokelayo ibangela ukukhokela xa udibana ne-ethanol, i-ether kunye nezinye izinyibilikisi.I-PVC equlethe iityuwa zelothe ezisetyenziselwa ukupakishwa kokutya kunye nee-doughnuts, iikeyiki eziqhotsiweyo, intlanzi eqhotsiweyo, iimveliso zenyama ephekiweyo, amaqebengwana kunye nokutya okuthotyiweyo, kuya kwenza iimolekyuli ezikhokelayo zisasazeke kwigrisi, ngoko awukwazi ukusebenzisa iingxowa zeplastiki zePVC ukutya okuqulethe ioli.Ukongeza, akukho bushushu be-microwave, akukho kusetyenziswa kobushushu obuphezulu.Kuba iimveliso zeplastiki zePVC ziya kubola kancinci kancinci igesi yehydrogen chloride kumaqondo obushushu aphezulu, anje malunga ne-50℃, kwaye le gesi iyingozi kumzimba womntu, ngoko ke iimveliso zePVC akufuneki zisetyenziswe njengokupakishwa kokutya.