Iindaba

Iifilimu ze-LDPE zihlala zenziwa ngeenkqubo zokubumba ngemibhobho kunye neenkqubo zokubumba ngemibhobho. Ifilimu ye-polyethylene ephothiweyo inobukhulu obufanayo, kodwa ayisetyenziswa rhoqo ngenxa yexabiso layo eliphezulu. Ifilimu ye-polyethylene ephothiweyo yenziwe ngee-pellets ze-PE eziphothiweyo ngoomatshini bokubumba ngemibhobho, eyona isetyenziswa kakhulu ngenxa yexabiso layo eliphantsi.

Ifilimu ye-polyethylene enoxinano oluphantsi yifilimu ecacileyo kancinci, ekhazimlayo, ethambileyo, enozinzo oluhle kakhulu lweekhemikhali, ukuvalwa kobushushu, ukumelana namanzi kunye nokumelana nokufuma, ukumelana nokubanda, inokubiliswa. Ingxaki yayo ephambili sisithintelo esibi kwioksijini, esetyenziswa kakhulu kwizixhobo zokupakisha eziguquguqukayo ezidityanisiweyo, umaleko wangaphakathi wefilimu, kodwa okwangoku yeyona isetyenziswa kakhulu, inani elikhulu lefilimu yokupakisha yeplastiki, ebangela ngaphezulu kwe-40% yokusetyenziswa kwefilimu yokupakisha yeplastiki.

Ekubeni imolekyuli ye-polyethylene ingenamaqela e-polar kwaye inezinga eliphezulu le-crystallinity kunye namandla aphantsi angenamphezulu, ifilimu ayinazo iimpawu zokuprinta ezilungileyo kwaye ayinakunamathela kakuhle kwiinki kunye nezincamathelisi, ngoko ke unyango lomphezulu luyimfuneko ngaphambi kokuprinta nokulamina.

Oku kulandelayo ziimpazamo eziqhelekileyo kunye nezisombululo zefilimu evuthelweyo ye-LDPE:

Ifilimu inamathela kakhulu, ayivuleki kakuhle

Uhlalutyo lwesizathu:

1. Izinto eziluhlaza ze-resin azikho zohlobo olufanelekileyo, azikho ze-LDPE zefilimu ezivuthuziweyo, ezingenayo i-arhente yokuvula okanye i-arhente yokuvula ikumgangatho ophantsi;

2. Ubushushu be-resin enyibilikisiweyo buphezulu kakhulu, ukunyibilika kwayo kukhulu kakhulu;

3. Umlinganiselo wokuvuthela mkhulu kakhulu, nto leyo ebangela ukuba iifilimu zingavuleki kakuhle;

4. Isantya sokupholisa sicotha kakhulu, ifilimu ayipholiswanga ngokwaneleyo, kwaye ukubophana kwenzeka phantsi kwesenzo soxinzelelo lwe-traction roller;

5. Isantya sokutsala sikhawuleza kakhulu.

Izisombululo

① Buyisela i-resin eluhlaza, okanye wongeze ubungakanani obuthile be-agent yokuvula kwi-hopper;

② Nciphisa ngokufanelekileyo ubushushu be-extrusion kunye nobushushu be-resin;

③ Nciphisa ngokufanelekileyo umlinganiselo wokuvuthela;

④ Yandisa ivolumu yomoya ukuze kuphuculwe isiphumo sokupholisa kwaye kukhawuleziswe isantya sokupholisa ifilimu;

⑤ Nciphisa isantya sokuhamba ngokufanelekileyo.

Ukubonakala kakubi kwefilimu

Uhlalutyo lwesizathu:

1. ubushushu obuphantsi bokukhupha izinto, i-resin plasticization embi, nto leyo ebangela ukuba ifilimu ingacaci kakuhle emva kokubumba ngebhombu;

2. Umlinganiselo wokuvuthela umncinci kakhulu;

3. Isiphumo esibi sokupholisa, ngaloo ndlela sichaphazela ukucaca kwefilimu;

4. Ubungakanani bokufuma kwi-resin bukhulu kakhulu;

5. Isantya sokutsala sikhawuleza kakhulu kwaye ifilimu ayipholiswanga ngokwaneleyo.

Isisombululo

① Ngokufanelekileyo yonyusa ubushushu be-extrusion, ukuze i-resin ikwazi ukwenziwa iplastiki ngokulinganayo;

② Nyusa umlinganiselo wokuvuthela ngokufanelekileyo;

③Nyusa ivolumu yomoya ukuze kuphuculwe isiphumo sokupholisa;

③ Nyusa ivolumu yomoya ukuze kuphuculwe isiphumo sokupholisa;

④ Yomisa izinto eziluhlaza;

⑤ Nciphisa isantya sokuhamba ngokufanelekileyo.

Imibimbi yefilimu

Uhlalutyo lwesizathu

1. Ubukhulu befilimu obungalinganiyo;

2. Isiphumo sokupholisa esinganelanga;

3. Umlinganiselo wokuvuthela mkhulu kakhulu, nto leyo ebangela ukuba iqamza lefilimu lingaguquguquki, lijike libuye libuye libuye libuye livela kwelinye icala, ngoko ke ifilimu inokuba nemibimbi;

4. I-engile ye-herringbone clamp inkulu kakhulu, i-film bubble ithambile kumgama omfutshane, ngoko ke ifilimu ikwanobunzima bokushwabana;

5. Uxinzelelo kumacala omabini e-traction roller aluhambelani, elinye icala liphezulu kwaye elinye icala liphantsi;

6. Ii-axes eziphakathi kwee-guide rollers azihambelani, nto leyo echaphazela uzinzo kunye nokuba tyaba kwefilimu, ngaloo ndlela kubakho ukushwabana.

Isisombululo

① Lungisa ubukhulu befilimu ukuqinisekisa ukuba ubukhulu bayo buyafana;

② Phucula isiphumo sokupholisa ukuqinisekisa ukuba ifilimu inokuphola ngokupheleleyo;

③ Nciphisa ngokufanelekileyo umlinganiselo wokuvuthela;

③ Nciphisa umlinganiselo wokuvuthela ngokufanelekileyo;

④ Nciphisa i-engile yokubambelela ye-herringbone clamp ngokufanelekileyo;

⑤ Lungisa uxinzelelo lwerola yokutsala ukuqinisekisa ukuba ifilimu iphantsi kwamandla afanayo;

⑥ Jonga i-axis yeshaft nganye yesikhokelo uze ubenze bahambelane.

Ukusebenza kakubi kokutywina ubushushu kwefilimu

Uhlalutyo lwesizathu

1. Umgca weqabaka uphantsi kakhulu, iimolekyuli zepolymer ziyajongwa, ngaloo ndlela zenza ukusebenza kwefilimu kufane noko kwefilimu ejongiweyo, nto leyo ebangela ukusebenza okuphantsi kokutywinwa kobushushu;

2. Umlinganiselo wokuvuthela kunye nomlinganiselo wokutsalwa mkhulu kakhulu, kwaye ifilimu idlula kwindlela yokuzolula, nto leyo echaphazela ukusebenza kokutywinwa kobushushu kwefilimu.

Isisombululo

① Lungisa ubungakanani bomthamo womoya kwisangqa somoya ukuze indawo yombethe iphakame kancinci, kangangoko kunokwenzeka, phantsi kwendawo yokunyibilika kweplastiki evuthuzayo neyibambekayo, ukuze kuncitshiswe iimolekyuli ngenxa yokuvuthuza nokubambelela okubangelwa kukujongwa kokunwebeka;

② Umlinganiselo wokuvuthela kunye nokutsalwa kufuneka ube mncinci ngokufanelekileyo. Ukuba umlinganiselo wokuvuthela mkhulu kakhulu kwaye isantya sokutsalwa sikhawuleza kakhulu, ifilimu yoluliwe kakhulu kwicala elinqamlezileyo nelide, ngoko ukusebenza kwefilimu kudla ngokuba lude kwicala elibini, kwaye iipropati zokuvala ubushushu befilimu ziya kuba zimbi.

Ifilimu inevumba elimnandi

Uhlalutyo lwesizathu

1. Izinto ezikrwada ze-resin ngokwazo zinevumba elimnandi;

2. Ubushushu bokuphuma kwe-resin enyibilikisiweyo buphezulu kakhulu, nto leyo ebangela ukuba i-resin ibole, ngaloo ndlela ivelise ivumba elibi;

3. Ukuphola okungonelanga kweqamza lefilimu, umoya oshushu ongaphakathi kweqamza lefilimu awususwa.

Isisombululo

①Buyisela izinto eziluhlaza ze-resin;

② Lungisa ubushushu bokukhupha;

③Phucula ukusebenza kakuhle kokupholisa kweringi yomoya opholileyo, ukuze iqamza lefilimu liphole ngokwaneleyo.

Umhlophe uphuma phezu komphezulu wefilimu

Isizathu: Ngokuyintloko zizinto ezongeziweyo kwizixhobo ezikrwada, ii-resins ezinobunzima obuphantsi beemolekyuli kunye nothuli, njl.njl., ezijiya kwisikhunta somlomo ngexesha lokucubungula, kwaye emva kokuqokelelana kwesixa esithile zithathwa yifilimu rhoqo, ngaloo ndlela zenze iiprecipitates ezimhlophe kwifilimu.

Isisombululo

①Emva kwexesha elithile, yonyusa isantya sesikrufu, yonyusa uxinzelelo lokunyibilika, susa iiprecipitates.

② Coca rhoqo isikhunta somlomo.

③ Nyusa ubushushu bokunyibilika ngokufanelekileyo ukuze kwenziwe iplastiki ngokupheleleyo;

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Izisombululo zefilimu ze-LDPE zokuphucula umgangatho wemveliso

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