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Inkqubo yokuvelisa ifilimu yokuvuthela i-PE

I-Hopper feeding - i-plasticizing extrusion yezinto ezibonakalayo - ukuvuthela i-traction - ukupholisa i-ring ring - i-herring splint - i-traction roller traction - unyango lwe-corona - ukuvuthwa kwefilimu, kodwa kuyafaneleka ukuba kuboniswe ukuba ukusebenza kwefilimu evuthelweyo kunobudlelwane obukhulu kunye neeparitha zenkqubo yemveliso, ngoko ke , kwinkqubo yokuvuthela ifilimu, kufuneka iqinise ulawulo lweeparameters zenkqubo, ukusebenza kwenkqubo esemgangathweni, ukuqinisekisa ukuveliswa kwemveliso, Kwaye ufumane iimveliso zefilimu eziphezulu.

Ukulungiswa kunye neenxalenye eziphambili zefilimu yezolimo

Ifilimu yezolimo yenziwe ngepolymer ephezulu njengomzimba ophambili, yongeza inani elifanelekileyo lezongezo ezisebenzayo, emva kokubunjwa kokubunjwa.Izinto ezifanelekileyo zefilimu yokuchithwa yi-polyolefin, njenge-polyethylene (PE), i-polyvinyl chloride (PVC), i-ethylene - i-vinyl acetate copolymer (EVA) kunye nezinye i-thermoplastics.

I-Thermoplastics ayinayo indawo yokunyibilika njengeekhompawundi zemolekyuli ephantsi, kodwa inyibilika ngexesha elithile lobushushu, ngaphakathi apho i-viscoelastic.Ukusebenzisa le propati, inokufudunyezwa kwisimo esinyibilikayo esifana ne-sugar gum, i-bubble evuthelayo, ukupholisa, ukunyanga, ukubunjwa, ukunyathela ukufumana ubungakanani obuthile befilimu yokuchithwa.

Ukuhlelwa kwefilimu yezolimo

I-1, ifilimu yokumelana nokuguga (ifilimu echitha ixesha elide).Yongeza amawaka ambalwa okukhanya okugqwesileyo kokuzinzisa kweyona mathiriyeli ikrwada.Ifilimu ye-Shed kwindawo ye-oksijini ngokukhanya (ingakumbi i-ultraviolet) irradiation, kuya kuba neenguqu ezahlukeneyo, ezifana nokuguqulwa kombala, ukuchithwa kwendawo, ukuchithwa komatshini.Ubomi benkonzo yefilimu eqhelekileyo ye-polyolefin shed kuphela kwiinyanga ezi-4 ukuya kwezi-5, ngelixa imveliso yezolimo eqhelekileyo yasebusika ifuna ubomi befilimu echithiweyo ziinyanga ezili-9 ukuya kwezi-10.Ubomi benkonzo obuqhubekayo bemimandla nganye okanye iintlobo zezityalo ezizimeleyo zifuna ifilimu echithiweyo ibe ngaphezu kweminyaka emi-2, kwaye ubomi befilimu yokuchithwa kweentyatyambo kunye nefilimu ye-ginseng ineminyaka engaphezu kwe-3.Le njongo ingentla inokufezekiswa ngokongeza amawaka ambalwa e-agent egqwesileyo yokuzinzisa ukukhanya ukulungiselela ifilimu yokuchitha ixesha elide.

2, akukho filimu yokulahla.Ifilimu echithweyo apho ezinye ii-surfactants zongezwa kwizinto eziphambili ukwenzela ukuba indawo yangaphakathi yefilimu ingabonakali (okanye ifane ibonakale ixesha elithile) amaconsi e-condensation ngexesha lokusetyenziswa kwengubo.Ebusika obubandayo, iqondo lokushisa ngaphakathi kwi-greenhouse liphezulu kunelo ngaphandle, kwaye umswakama mkhulu, i-greenhouse ifana nefilimu eyandisiweyo yekomityi yamanzi ashushu.Umphunga wamanzi kulula ukufikelela kwindawo yamazolo emva kokuqhagamshelana nefilimu, ukwenza amaconsi amanzi kwindawo yangaphakathi yefilimu.Ukuhla kwamanzi kufana ne-lens, xa ukukhanya okuvela ngaphandle ukuya kwi-shed, umphezulu wamanzi uya kwenza i-phenomenon ye-refraction yokukhanya, ukukhanya akukwazi ukungena kwi-shed, ukunciphisa kakhulu ukuhanjiswa kokukhanya kwefilimu echithiweyo, kungabi luncedo. kwi photosynthesis yezityalo.Ukuba ukukhanya kugxininiswe “kwilensi” kwaye kubethe isityalo, kuya kutshisa isityalo kwaye kusenzakalise.Amathontsi amakhulu amanzi kwizityalo anokubangela ukuba zibole.Emva kokongeza ezinye i-surfactants, umphezulu wefilimu engena-drip uguqulwa ube yi-hydrophobic ukuya kwi-hydrophilic, kwaye amathontsi amanzi kungekudala aya kwenza ifilimu yamanzi ecacileyo ecaleni kwendawo yangaphakathi yefilimu ethathiweyo, kwaye ukuhanjiswa kokukhanya kwefilimu akukho. abachaphazelekayo.

I-3, akukho kwehla, umsebenzi wokuphelisa inkungu uchithe ifilimu.I-fluoride kunye ne-silicon antifogging agents zongezwa ngesiseko sefilimu engena-drip.I-greenhouse yelanga yasebusika isebenzisa ikhava yefilimu ngokubanzi, ihlala ivelisa inkungu enzima, ukukhanya kwe-greenhouse kuyancipha, okuchaphazela uphuhliso lwezityalo, kodwa kulula ukubangela izifo.Ngokwesiseko sefilimu engathontsiziyo, yongeza i-fluorine kunye ne-silicon fogging agent, ukuze umphunga wamanzi okwimo ye-susaturated yeshedi unokujiya ngokukhawuleza kumphezulu wefilim, naphantsi kwesenzo sokuthontsiza. i-arhente, amathontsi amanzi ecaleni umphezulu greenhouse film ngokukhawuleza ancedisayo ukusasazeka kunye nokuqukuqela emhlabeni, oku kuthontsiza free, umsebenzi inkungu yefilimu ephalaziweyo.

I-4, ifilimu ekhanyayo (ifilimu yokuguqula ukukhanya).I-ejenti yokuguqula i-optical yongezwa kwizinto eziphambili zekrwada.Kwiminyaka yakutshanje, ngokomgaqo we-ecology yokukhanya, iteknoloji yokuguqula amandla elanga isetyenziswe kwifilimu yezolimo, oko kukuthi, i-agent yokuguqula ukukhanya yongezwa kwifilimu yokuchitha, amandla elanga kwi-photosynthesis yesityalo incinci kakhulu ibe bomvu. ukukhanya orenji kulungele ukukhula kwezityalo, ukuphucula iphotosynthesis yezityalo kwifilimu yeplastiki, ukuphucula izinga lokusetyenziswa kwamandla okukhanya kweplastiki eluhlaza, ukuze kuphuculwe umgangatho wezityalo.Okufana nokuphucula ubuswiti besiqhamo, ukukhula kwangoko, ukwandisa imveliso, ukwandisa umvuzo, ukuhombisa umbala weentyatyambo kunye nemithi.

I-5, ifilimu ephezulu yokugquma.Ukusebenzisa ukuhanjiswa kokukhanya okuphezulu okubonakalayo, i-infrared blocking effect yepolymer ephezulu kunye nokongeza i-infrared absorbent, eyenziwe ngefilimu yokushisa ephezulu.Ifilimu yokugquma iphezulu inokufunxa ubushushu obukhazimlayo kangangoko kunokwenzeka emini kwaye inciphise ubushushu obukhazimlayo kangangoko kunokwenzeka ebusuku.Emini, ukukhanya kwelanga kukhanya kakhulu kwifilimu ngokukhanya okubonakalayo kokukhanya okubonakalayo kwe-0.3 ~ 0.8 micron, eyandisa ubushushu kwi-greenhouse kwaye ithatha ubushushu obuninzi emhlabeni.Ebusuku, kukho umehluko weqondo lokushisa phakathi kwangaphakathi nangaphandle, kwaye umhlaba ukhupha ukushisa ngendlela yokukhanya kwe-infrared kunye nobude be-7-10 microns.Ke ngoko, ngokusebenzisa i-polymer ephezulu kunye nokuhanjiswa okuphezulu kokukhanya okubonakalayo kunye nesiphumo esihle sokuthintela i-infrared, kwaye ngokongeza i-infrared absorbent, abantu baye baphuhlisa ifilimu yokugcina ubushushu obuphezulu.Okwangoku, kuye kwenziwa inkqubela phambili enkulu ekusebenziseni izixhobo ze-nano-insulation kwi-membrane.

6, inwebu esebenzayo.Ngokwendlela yokwahlulahlula, kukho ifilimu eyodwa yomaleko kunye nefilimu ehlanganisiweyo ye-multilayer co-extrusion, le yokugqibela yifilimu esebenzayo.Ngokomzekelo, ifilimu ye-0.1mm inokuqulunqwa ngamanqwanqwa angama-3, ukubaluleka kwayo kukuba, ngokongeza ezona zilungileyo kunye nezongezo ezinoqoqosho kwinqanaba ngalinye, zinike ifilimu yokuchithwa efunekayo imisebenzi emininzi.Ngokomzekelo, yongeza amaconsi amaninzi kunye nee-fogging agents kwinqanaba eliphakathi, kwaye ungeze ngakumbi i-stabilizer yokukhanya kwinqanaba elingaphandle.

I-7, ifilimu yombala.Iveliswa ngokomgaqo we-optics.Ngaphantsi kwesigqubuthelo sefilimu ebomvu, izithole zekotoni zakhula kakuhle, iziqu zazinzima, iingcambu zaphuhliswa kwaye izinga lokusinda liphezulu.Ukutyala iminqathe kunye nekhaphetshu ngefilimu yezolimo etyheli kunokukhawulezisa ukukhula kwazo, kwaye ukugquma ikhukhamba kunokunyusa isivuno ngaphezu kwama-50%.Ukusebenzisa ifilimu yezolimo emfusa kunokunyusa kakhulu isivuno se-eggplant, i-leek kunye nepayinapile;Amaqunube aphantsi kwengubo eluhlaza athwala iziqhamo ezinkulu kunye nezininzi.Iinzuzo zefilimu yombala ekukhuthazeni imveliso yezityalo, ukwandisa isivuno kunye nokuphucula umgangatho kubonisa amathuba okusebenza okubanzi.

8. I-membrane yokunciphisa.Iphuhliselwe "ungcoliseko olumhlophe" olubangelwa yinkunkuma yefilim yezolimo.Ifilimu eshiyekileyo yefilimu eyonakalisiwe ingazibolisa ngexesha elifutshane phantsi kwefuthe leemeko ezahlukeneyo zendalo.Iifilimu zokunciphisa umgangatho zinokwahlulwa zibe ziindidi ezintathu: ukuthotywa kwefoto, i-biodegradation kunye ne-photobiodegradation.Umboniso bhanyabhanya we-e starch kunye nefibre yengca eziphuhliswayo kwilizwe lethu zezemiboniso bhanyabhanya ezohlisa isidima.Iisampulu ziphuhlisiwe kwaye zibekwe kwimveliso yeebhetshi ezincinci.