isicelo

Inqubo yokukhiqiza ifilimu ye-PE blow blowing

I-Hopper feeding - i-plasticizing extrusion yezinto ezibonakalayo - ukudonsa okuphefumulayo - ukupholisa indandatho yomoya - i-herring splint - i-traction roller traction - ukwelashwa kwe-corona - ukuvuthwa kwefilimu, kodwa kufanelekile ukukhomba ukuthi ukusebenza kwefilimu eshaywayo kunobudlelwane obukhulu nemingcele yenqubo yokukhiqiza, ngakho-ke. , ngesikhathi sokuqhunyiswa kwefilimu, kumele kuqinise ukulawulwa kwemingcele yenqubo, ukusebenza kwenqubo evamile, ukuqinisekisa ukukhiqizwa okubushelelezi, Futhi ukuthola imikhiqizo yefilimu yekhwalithi ephezulu.

Ukucubungula kanye nezingxenye eziyinhloko zefilimu yezolimo

Ifilimu yezolimo yenziwe nge-polymer ephezulu njengomzimba oyinhloko, enezela inani elifanele lezithasiselo ezisebenzayo, ngemuva kokucutshungulwa kokubumba.Izinto ezifanele zefilimu echithiwe yi-polyolefin, njenge-polyethylene (PE), i-polyvinyl chloride (PVC), i-ethylene - i-vinyl acetate copolymer (EVA) namanye ama-thermoplastics.

I-Thermoplastics ayinayo indawo yokuncibilika njengezinhlanganisela zamangqamuzana aphansi, kodwa iyancibilika ngesikhathi esithile sokushisa, lapho i-viscoelastic.Ukusebenzisa le mpahla, ingashiswa ibe yisimo sokuncibilika esifana noshukela we-gum, i-bubble ephefumulayo, ukupholisa, ukuphulukisa, ukubunjwa, ukudonsa ukuze uthole usayizi othile wefilimu echithiwe.

Ukuhlukaniswa kwefilimu yezolimo

1, ifilimu yokumelana nokuguga (ifilimu yokuchitha impilo ende).Engeza izinkulungwane ezimbalwa ze-stabilizer yokukhanya enhle kakhulu kokusetshenziswa okuyinhloko okuluhlaza.Shed ifilimu endaweni ye-oksijini ngokukhanya (ikakhulukazi i-ultraviolet), kuzoba nezinguquko ezihlukahlukene, ezifana nokushintsha umbala, ukuqhekeka kwendawo, ukuwohloka kwemishini.Impilo yesevisi yefilimu evamile ye-polyolefin shed iyizinyanga ezi-4 kuya kwezi-5 kuphela, kanti ukukhiqizwa kwezolimo okujwayelekile kwasebusika kudinga impilo yefilimu echithiwe yizinyanga eziyi-9 kuya kweziyi-10.Ukuphila kwenkonzo okuqhubekayo kwezifunda ngazinye noma izinhlobo zezitshalo ngazinye kudinga ifilimu elichithiwe libe ngaphezu kweminyaka emi-2, futhi impilo yefilimu ye-flower shed film nefilimu ye-ginseng shed ingaphezu kweminyaka emi-3.Inhloso engenhla ingafinyelelwa ngokungeza izinkulungwane ezimbalwa ze-ejenti yokuqinisa ukukhanya ukuze kulungiswe ifilimu yokuchitha isikhathi eside.

2, ayikho ifilimu yokudonsa.Ifilimu elichithiwe lapho amanye ama-surfactants engezwa khona ezintweni eziyinhloko ukuze kungabonakali indawo yangaphakathi yefilimu (noma engavamile ukuvela isikhathi esithile) amaconsi e-condensation ngesikhathi sokusetshenziswa kwe-coating.Ebusika obubandayo, izinga lokushisa ngaphakathi kwe-greenhouse liphakeme kunangaphandle, futhi umswakama mkhulu, i-greenhouse ifana nefilimu ekhulisiwe inkomishi yamanzi ashisayo.Umhwamuko wamanzi kulula ukufinyelela iphuzu lamazolo ngemva kokuxhumana nefilimu, wenze amaconsi amanzi endaweni engaphakathi yefilimu.Iconsi lamanzi lifana ne-lens, lapho ukukhanya okuvela ngaphandle kuya eshedini, ubuso bamanzi buzokwenza i-refraction ye-light refraction, ukukhanya akukwazi ukungena eshedini, kunciphisa kakhulu ukudluliswa kokukhanya kwefilimu echithiwe, hhayi efanelekile. ku-photosynthesis yezitshalo.Uma ukukhanya kugxile “kwilensi” futhi kushaya isitshalo, kuzoshisa isitshalo futhi kusilimaze.Amaconsi amakhulu amanzi ezitshalweni angabangela ukuthi zibole.Ngemuva kokwengeza ama-surfactants athile, ingaphezulu lefilimu elingaconsi liyashintshwa libe yi-hydrophobic libe yi-hydrophilic, futhi amaconsi amanzi maduzane azokwakha ifilimu lamanzi elisobala eduze kwendawo engaphakathi yefilimu ethathiwe, futhi ukudluliswa kokukhanya kwefilimu akukona. abathintekayo.

3, akukho iconsi, ukuqeda inkungu umsebenzi chitha ifilimu.I-fluoride ne-silicon antifogging ejenti yengezwe ngesisekelo sefilimu engaconsi.Ubusika abamba ukushisa elanga usebenzisa ikhava jikelele ifilimu, ngokuvamile ukukhiqiza inkungu esindayo, abamba ukushisa umfutho ukukhanya kuyancipha, ezithinta ukuthuthukiswa izitshalo, kodwa futhi kulula ukubangela izifo.Ngokwesisekelo sefilimu engaconsi, engeza i-fluorine kanye ne-silicon fogging agent, ukuze umhwamuko wamanzi osesimeni esishisayo seshede ukwazi ukujiya ngokushesha ngaphezu kwefilimu echithiwe, nangaphansi kwesenzo sokungaconsi. i-ejenti, amaconsi amanzi eduze kobuso befilimu ye-greenhouse asakazeka ngokushesha futhi ageleze phansi, lokhu kungumsebenzi wokuvuza okungenamaphutha, wefilimu echithiwe.

4, ukukhanya shed ifilimu (light ukuguqulwa ifilimu).I-ejenti yokuguqula i-optical yengezwa kokusetshenziswa okuyinhloko okuluhlaza.Eminyakeni yamuva, ngokusho kwesimiso se-ecology yokukhanya, ubuchwepheshe bokuguqulwa kwamandla elanga busetshenziselwa ifilimu yezolimo, okungukuthi, i-ejenti yokuguqula ukukhanya yengezwe efilimu echithiwe, amandla elanga esitshalweni se-photosynthesis mancane kakhulu abomvu. ukukhanya okusawolintshi okuvumela ukukhula kwezitshalo, kuthuthukise i-photosynthesis yezitshalo efilimini ye-plastic shed, kuthuthukisa izinga lokusebenzisa amandla okukhanya we-plastic greenhouse, ukuze kuthuthukiswe ikhwalithi yezitshalo.Okufana nokuthuthukisa ubumnandi bezithelo, ukuvuthwa kwangaphambi kwesikhathi, ukwandisa umkhiqizo, ukwandisa imali engenayo, ukuhlobisa umbala wezimbali nezihlahla.

5, high insulation ifilimu.Kusetshenziswa ukudlulisa ukukhanya okuphezulu okubonakalayo, umphumela wokuvinjwa kwe-infrared we-polymer ephezulu futhi wengeze i-infrared absorbent, eyenziwe ngefilimu yokushisa ephezulu.Ifilimu yokushisa ephezulu ingamunca ukushisa okukhazimulayo ngangokunokwenzeka phakathi nosuku futhi inciphise ukushisa okukhazimulayo ngangokunokwenzeka ebusuku.Emini, ukukhanya kwelanga kukhanya ikakhulukazi efilimini enokukhanya okubonakalayo kwe-wavelength engu-0.3~0.8 micron, okwandisa izinga lokushisa ku-greenhouse futhi kubambe ukushisa okukhulu emhlabathini.Ebusuku, kukhona umehluko wokushisa phakathi kwangaphakathi nangaphandle, futhi inhlabathi ikhipha ukushisa ngendlela yokukhanya kwe-infrared nge-wavelength ye-7-10 microns.Ngakho-ke, ngokusebenzisa i-polymer ephezulu ene-transmittance ephezulu yokukhanya okubonakalayo kanye nomphumela omuhle wokuvinjwa kwe-infrared, futhi ngokungeza i-infrared absorbent, abantu baye bahlakulela ifilimu egcina izinga lokushisa eliphezulu.Njengamanje, intuthuko enkulu yenziwe ekusetshenzisweni kwezinto ze-nano-insulation kulwelwesi.

6, ulwelwesi olusebenzayo.Ngokwesigaba sendlela yokucubungula, kunefilimu eyingqimba eyodwa kanye nefilimu eyinhlanganisela ye-multilayer co-extrusion, lena yokugcina iyifilimu esebenza ngezinto eziningi.Isibonelo, ifilimu engu-0.1mm ingakhiwa izendlalelo ezingu-3, ​​ukubaluleka kwayo, ngokungeza izithasiselo ezinengqondo futhi ezongayo kungqimba ngayinye, ukunikeza ifilimu echithiwe imisebenzi eminingi edingekayo.Isibonelo, engeza amaconsi engeziwe nama-agent afaka inkungu kungqimba oluphakathi, bese wengeza isiqinisi sokukhanya kungqimba olungaphandle.

7, ifilimu yombala.Ikhiqizwa ngokuvumelana nesimiso se-optics.Ngaphansi kwesembozo sefilimu ebomvu, izithombo zikakotini zakhula kahle, iziqu zaziwugqinsi, izimpande zathuthukiswa futhi izinga lokusinda laliphezulu.Ukutshala izaqathe neklabishi ngefilimu yezolimo ephuzi kungasheshisa ukukhula kwazo, futhi ukumboza ikhukhamba kungakhuphula isivuno ngaphezu kuka-50%.Ukusebenzisa ifilimu yezolimo ensomi kungakhuphula kakhulu isivuno sesitshalo seqanda, i-leek kanye nephayinaphu;Ama-strawberries angaphansi kwengubo eluhlaza okwesibhakabhaka athela izithelo ezinkulu futhi eziningi.Izinzuzo zefilimu yombala ekukhuthazeni ukukhiqizwa kwezitshalo, ukwandisa isivuno nokuthuthukisa ikhwalithi kubonisa amathemba okusebenza abanzi.

8. Ulwelwesi lokuwohloka.Yenzelwe "ukungcola okumhlophe" okubangelwa udoti wefilimu yezolimo.Ifilimu esele yefilimu eyonakalisiwe ingazibolisa ngesikhathi esifushane ngaphansi kwethonya lezimo ezihlukahlukene zemvelo.Amafilimu okucekela phansi angahlukaniswa abe yizinhlobo ezintathu: i-photodegradation, biodegradation kanye ne-photobiodegradation.Ifilimu ye-e isitashi kanye nefilimu yotshani ethuthukiswayo ezweni lethu ingeyamafilimu adicilela phansi isithunzi.Amasampula athuthukisiwe futhi afakwa ekukhiqizeni amaqoqo amancane.