Ukupakisha ukutywina kunye nezinto zokutywina ubushushu zezi zilandelayo;

1. Ukupakisha indlela yokutywina

Iindlela zokutywinwa kwephakheji kubandakanya ukutywina okushushu, ukutywina okubandayo, ukutywina okuncamathelayo, njl.njl.Ukutywinwa kobushushu kubhekisa ekusetyenzisweni kwecandelo elingaphakathi le-thermoplastic layer kwi-multilayer edityanisiweyo yesakhiwo sefilimu, ethambisa ukutywina xa kushushubeza, kwaye yomeleze xa umthombo wobushushu isuswe. Ukutywinwa kobushushu beeplastiki, ukutyabeka kunye nokunyibilika okushushu kusetyenziswa izixhobo zokutywina ubushushu. Ukutywina okubandayo kubhekisa ekubeni kunokutywinwa ngokucinezela ngaphandle kokufudumeza. Eyona nto ixhaphakileyo yokutywina okubandayo kukugqunywa komphetho kusetyenziswa kumda wengxowa yokupakisha. Ukuncamathelisa okuncamathelayo kunqabile ukuba kusetyenziswe kupakisho lwezinto ezininzi, ezisetyenziselwa kuphela izinto zokupakisha ezinamaphepha.

2. Izinto zokutywina ubushushu

(1)I-Polyethylene (PE) luhlobo olumhlophe olunamafutha amhlophe, agqithisileyo kwaye aqaqambile. Iphantse yangangcamli, ayinabungozi kwaye ikhaphukhaphu kunamanzi. I-PE macromolecular chain ine-flexibility efanelekileyo kwaye kulula ukuyifaka. Izinto ezinzima kwiqondo lokushisa. Njengempahla yokupakisha, eyona nto iphambili kwi-PE kukuxinana komoya okungafanelekanga, ukungena okuphezulu kwirhasi kunye nomphunga, amandla aphantsi kunye nokumelana nobushushu; Kulula ukuthotywa kukukhanya, ubushushu kunye nepali, ke i-antioxidant kunye nokukhanya kunye nokuzinzisa ubushushu zihlala zongezwa kwiimveliso ze-PE ukunqanda ukwaluphala; I-PE inokuxhathisa koxinzelelo lokusingqongileyo, kwaye ayimelani nokubola kwe-h2s04, i-HNO3 kunye ne-oxidant yayo, kwaye iya kutshabalaliswa zii-hydrocarbon ze-aliphatic okanye ii-hydrocarbon zeklorin xa zishushu; Ukusebenza kokuprinta kwe-PE kuhlwempuzekile, kwaye umphezulu awuyi-polar, ke unyango lwe-corona kufuneka lwenziwe ngaphambi kokuprinta kunye nokubopha okomileyo ukuphucula ukudibana kunye nonxibelelwano olomileyo lwe-inki yokuprinta.

I-PE esetyenziselwa ukutywina kobushushu ikakhulu kubandakanya:
I-polyethylene esezantsi (LDPE), ekwabizwa ngokuba yi-polyethylene yoxinzelelo oluphezulu;
Ubuninzi be-polyethylene (HI) PE, ekwabizwa ngokuba yi-polyethylene yoxinzelelo oluphantsi;
Ubuninzi be-polyethylene (nu) PE :); i-polyethylene yomgangatho ophantsi (LLDPE);
④ metallocene catalyzed polyethylene.

(2)Iimpawu zefilimu ye-polypropylene (CPP) esetyenziselwa ukutywina ubushushu yahluke kancinane kuleyo ye-biaxially ejolise kwi-polypropylene ngenxa yenkqubo yayo yokuvelisa eyahlukileyo. Izibonelelo kunye nokungalunganga kwe-CPP kubonisiwe kwimixholo efanelekileyo ye "polypropylene".

(3) I-PVC (ishunqulelwe njenge-PVC) yintsimbi engenambala, ecacileyo nebukhali enobunzima be-molekyuli kunye namandla e-intermolecular, ke inobulukhuni obulungileyo kunye nebhotile yeplastiki engqongqo.

I-PVC inexabiso eliphantsi kwaye iyaguquguquka ngakumbi. Inokwenziwa kwizikhongozeli eziqinileyo zokupakisha, iibhabhu eziselubala kunye neefilimu ezipakishayo eziguqukayo kunye nezinto zokubopha zeplastiki. Ngenxa yetyhefu kunye nokubola komhlwa, ukusetyenziswa kwayo kuyancipha kwaye ngokuthe ngcembe kuthatyathelwe indawo zezinye izinto.

(4) I-EVA (ethylene vinyl acetate copolymer) poly (ethylene vinyl acetate) (EVA) poly (ethylene vinyl acetate) (EVA) poly (ethylene vinyl acetate) (EVA) poly (ethylene vinyl acetate) (EVA) poly (ethylene vinyl acetate) ( I-EVA) i-poly (ethylene vinyl acetate) (EVA) poly (ethylene vinyl acetate) (eva-eva) poly (ethylene vinyl acetate) (EVA) poly (ethylene vinyl acetate) (EVA. EVA yinto eguqukayo okanye encinci emhlophe emhlophe elungisiweyo ngu-copolymerization ye-ethylene kunye nevinlacetic acid iviniga. Iipropathi zayo ziyatshintsha kunye nomxholo wee-monomers ezimbini.Ngoko ke, xa ukhetha imodeli ye-EVA, kufuneka igqitywe ngokokusetyenziswa kwayo, kwaye inokusetyenziswa njengeplastikhi, inyibilikisi eshushu .
I-EVA isetyenziswa ngokubanzi njengaleyo yangaphakathi yefilimu edityanisiweyo ngenxa yokuqina kwayo okuhle kunye namandla ashushu okutywina. Isetyenziswa kwizincamathelisi, ukutyabeka, ukutyabeka, ukufakela intambo kunye nomphathi wombala ngokunamathela kwayo okuhle (ukulunga okanye ukubola okuthile ngezinto ezininzi ezi-polar kunye nezinga-polar).

(5)I-PVDC (i-polyvinylidene chloride) i-PVDC ngokubanzi ibhekisa kwi-copolymer ye-vinylidene chloride. I-polymeri efunyenwe yi-polymerization ine-crystallinity ephezulu, indawo yokuthambisa ephezulu (185-200'c) kwaye ikufutshane nobushushu bokubola (210-2250). Inokungqinelani okungalunganga kunye nomatshini wokugcina jikelele, ke kunzima ukubunjwa.
I-PVDC yinto eyomeleleyo nesekuhleni kunye nekristali ephezulu kunye nohlaza oluhlaza tyheli. Inezinga lokusasaza eliphantsi kakhulu lokuginya igesi, irhasi kunye nephunga, kwaye inokumelana nokufuma okuhle, ukuqina komoya kunye nokugcinwa kwevumba. Esi sisixhobo esihle kakhulu somqobo. Iyamelana neasidi, ialkali kunye nezinye izinyibilikisi, ioyile enganyangekiyo, iyaphika kwaye iyacima.