Iifilimu ze-LDPE ngokubanzi zenziwe zizo zombini ukubumba kunye neenkqubo zokuphosa. Ifilimu ye-polyethylene ye-Cast inobunzima obufanayo, kodwa ayifane isetyenziswe ngenxa yexabiso layo eliphezulu. Ifilimu ye-polyethylene evuthelweyo yenziwe kwiipellets ze-PE zebakala ngokuvuthela ngoomatshini bokubumba, eyona nto isetyenziswa kakhulu ngenxa yeendleko zayo eziphantsi.
Ifilimu ye-polyethylene ene-low density yi-semi-transparent, glossy, texture soft of the film, kunye nokuzinza kweekhemikhali ezigqwesileyo, ukutywinwa kobushushu, ukuxhathisa kwamanzi kunye nokuxhathisa ukufuma, ukumelana nokukhenkceza, kunokubiliswa. I-drawback yayo ephambili sisithintelo esibi kwi-oksijini, esetyenziswa ngokuqhelekileyo kwizinto zokupakisha eziguquguqukayo, umaleko wangaphakathi wefilimu, kodwa okwangoku yeyona nto isetyenziswa kakhulu, isixa esikhulu sefilimu yokupakisha yeplastiki, ebalwa ngaphezu kwe-40% yefilimu. ukusetyenziswa kwefilimu yokupakisha yeplastiki.
Ekubeni i-molecule ye-polyethylene ayinayo amaqela e-polar kwaye inezinga eliphezulu le-crystallinity kunye ne-low surface yamandla akhululekile, ifilimu ineempawu ezimbi zokuprinta kunye nokubambelela kakubi kwiinki kunye ne-adhesives, ngoko ke unyango oluphezulu luyafuneka ngaphambi kokuprintwa kunye ne-laminating.
Oku kulandelayo kukusilela okuqhelekileyo kunye nezisombululo zefilimu evuthelweyo ye-LDPE:
Ifilimu incangathi kakhulu, ayivuleki kakuhle
Uhlalutyo lwesizathu:
1. I-resin ekrwada ayilona uhlobo olufanelekileyo, ayivuthelwanga ifilimu yebakala le-LDPE resin, elingenayo i-agent yokuvula okanye i-agent yokuvula iphantsi komgangatho;
2. Iqondo lobushushu lentlaka etyhidiweyo liphezulu kakhulu, ulwelo lukhulu kakhulu;
3. Umlinganiselo wokuvuthela mkhulu kakhulu, okukhokelela ekuvulekeni kwefilimu embi;
4. Isantya sokupholisa sicotha kakhulu, ifilimu ayipholi ngokwaneleyo, kwaye ukudibanisa ngokubambisana kwenzeka phantsi kwesenzo soxinzelelo lwe-roller traction;
5. Isantya sokutsala sikhawuleza kakhulu.
Izisombululo
① Faka indawo ye-resin ekrwada, okanye wongeze inani elithile learhente yokuvula kwihopper;
② Ukunciphisa ngokufanelekileyo iqondo lokushisa lokukhupha kunye nobushushu be-resin;
③ Ukunciphisa ngokufanelekileyo umlinganiselo wokuvuthela;
④ Yandisa umthamo womoya ukuphucula isiphumo sokupholisa kunye nokukhawulezisa isantya sokupholisa ifilimu;
⑤ Nciphisa ngokufanelekileyo isantya sokurhuqa.
Ukungafihli kakuhle kwefilimu
Uhlalutyo lwesizathu:
1. Ubushushu obuphantsi be-extrusion, iplastiki ye-resin embi, ekhokelela ekungabonakali kakuhle kwefilimu emva kokubunjwa kokuvuthela;
2. Umlinganiselo wokuvuthela uncinci kakhulu;
3. Isiphumo esibi sokupholisa, ngaloo ndlela sichaphazela ukungafihli kwefilimu;
4. Isiqulatho sokufuma kwintlaka ekrwada inkulu kakhulu;
5. Isantya sokutsala sikhawuleza kakhulu kwaye ifilimu ayipholi ngokwaneleyo.
Isisombululo
① Yandisa ngokufanelekileyo iqondo lobushushu le-extrusion, ukuze i-resin ibe neplastiki efanayo;
② Yandisa ngokufanelekileyo umlinganiselo wokuvuthela;
③Yandisa umthamo womoya ukuphucula isiphumo sokupholisa;
③ Yandisa umthamo womoya ukuphucula isiphumo sokupholisa;
④ Yomisa imathiriyeli ekrwada;
⑤ Nciphisa isantya sokurhuqa ngokufanelekileyo.
Imibimbi yefilimu
Uhlalutyo lwesizathu
1. Ubunzima befilimu obungalinganiyo;
2. Isiphumo sokupholisa esinganelanga;
3. Umlinganiselo ovuthelayo ukhulu kakhulu, obangela ukuba i-bubble yefilimu ingazinzi, iguqa ngasemva nangaphezulu ukusuka kwelinye icala ukuya kwelinye icala, ngoko ke ifilimu iyakwazi ukushwabana;
4. I-angle ye-herringbone clamp inkulu kakhulu, i-bubble yefilimu ihlanjululwe kumgama omfutshane, ngoko ke ifilimu nayo iyakwazi ukushwabana;
5. Uxinzelelo kumacala omabini e-traction roller aluhambelani, elinye icala liphezulu kwaye elinye icala liphantsi;
6. I-axes phakathi kwee-roller zesikhokelo azihambelani, ezichaphazela ukuzinza kunye ne-flatness yefilimu, ngoko ke ukushwabana kwenzeka.
Isisombululo
① Lungisa ubukhulu befilimu ukuqinisekisa ubukhulu obufanayo;
② Ukuphucula umphumo wokupholisa ukuqinisekisa ukuba ifilimu inokupholisa ngokupheleleyo;
③ Ukunciphisa ngokufanelekileyo umlinganiselo wokuvuthela;
③ Nciphisa umlinganiselo wokuvuthela ngokufanelekileyo;
④ Nciphisa i-angle yokubamba ye-herringbone clamp ngokufanelekileyo;
⑤ Lungisa uxinzelelo lwe-traction roller ukuqinisekisa ukuba ifilimu ixhomekeke kumandla afanayo;
⑥ Jonga i-axis yeshafu yesikhokelo ngasinye kwaye ubenze bahambelane enye kwenye.
Ukusebenza kakubi kokuvalwa kobushushu befilimu
Uhlalutyo lwesizathu
1. Umgca weqabaka uphantsi kakhulu, iimolekyuli ze-polymer zihamba ngokuqhelaniswa, ngaloo ndlela zenza ukusebenza kwefilimu kufutshane nefilimu ejoliswe kuyo, okubangelwa ukusebenza okuphantsi kokutywinwa kobushushu;
2. Umlinganiselo wokuvuthela kunye ne-traction ratio inkulu kakhulu, kwaye ifilimu ithatha i-orientation eyolulayo, ngaloo ndlela ichaphazela ukusebenza kokutywinwa kobushushu kwefilimu.
Isisombululo
① Lungisa ubungakanani bomthamo womoya kwisangqa somoya ukwenza amazolo akhombe phezulu kancinci, kangangoko kunokwenzeka, phantsi kwendawo yokunyibilika yokuvuthuza kweplastiki kunye nokutsaleka, ukuze kuncitshiswe iimolekyuli ngenxa yokuvuthuza kunye nokutsaleka okubangelwa ukuzolula ukuqhelaniswa;
② Umlinganiselo wokuvuthela kunye nokutsala kufuneka ube mncinci ngokufanelekileyo. Ukuba umlinganiselo wokuvuthela mkhulu kakhulu kwaye isantya sokutsala sikhawuleza kakhulu, ifilimu yolulwe ngokugqithisileyo kumacala anqamlezayo kunye nobude, ngoko ukusebenza kwefilimu kuthande ukolulwa, kwaye iimpawu zefilimu zokuvala ubushushu ziya kuba mbi.
Ifilim inevumba
Uhlalutyo lwesizathu
1. I-resin ekrwada ngokwayo inevumba;
2. Ukushisa kwe-extrusion ye-resin etyhidiweyo kuphezulu kakhulu, okubangela ukuba i-resin ichithe, ngaloo ndlela ivelise iphunga;
3. Ukupholisa okunganeleyo kwebhola lefilimu, umoya oshushu ngaphakathi kwebhola lefilimu awususwanga.
Isisombululo
① Faka enye indawo yeresin ekrwada;
② Lungisa iqondo lobushushu lokukhupha;
③Phucula ukusebenza kakuhle kokupholisa kweringi yomoya yokupholisa, ukuze iqamu lefilim lipholiswe ngokwaneleyo.
I-White precipitates kumphezulu wefilimu
Isizathu: Ngaba ikakhulu izongezo kwizinto eziluhlaza, i-resin ephantsi ye-molecular weight and dust, njl., edibanisa emlonyeni womlomo ngexesha lokucubungula, kwaye emva kokuqokelela imali ethile ithathwa yifilimu ngokuqhubekayo, ngaloo ndlela yenze i-White precipitates kwifilimu.
Isisombululo
①Emva kwexesha elithile, yongeza isantya se-screw, yonyusa uxinzelelo lokunyibilika kwe-extrusion, susa imvula.
② Coca rhoqo ukungunda emlonyeni.
③ Yandisa iqondo lobushushu lokunyibilika ngokufanelekileyo ukwenza iplastiki ngokupheleleyo;
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Izisombululo zefilimu ze-LDPE zokuphucula umgangatho wemveliso
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