isicelo

Iningi le-thermoplastics lingashaywa ukukhiqizwa kwefilimu ngokubunjwa kokushaywa, ifilimu yokubumba ifilimu yepulasitiki iwukukhama ibe yithubhu elincanyana, bese ishaya ngomoya ocindezelwe ukuze iqhume i-plastic bulge, ngemva kokupholisa ukuphothula umklamo wemikhiqizo ye-tubular membrane, lolu hlobo lokusebenza kwefilimu phakathi ifilimu eqondiwe kanye nefilimu elula: amandla angcono kunefilimu enwetshiwe, ukuvalwa kokushisa kubi kunefilimu enwetshiwe.

Kunezinhlobo eziningi zefilimu ezikhiqizwa indlela yokubumba i-blow, njengeI-polyethylene ephansi (LDPE), i-linear polyethylene (LLDPE), i-polypropylene (PP), i-polyethylene ephezulu (i-HDPE), inayiloni (PA), i-ethylene ethylene acetate copolymer (EVA), njll. Lapha sethula kafushane inqubo yokukhiqiza i-blow molding yamafilimu asetshenziswa kakhulu e-LDPE ne-LLDPE .

1. Impahla eluhlaza ekhethiwe kufanele iqhunyiswe izinhlayiya ze-polyethylene resin, equkethe inani elifanele le-ejenti yokushelela, ukuze kuqinisekiswe ukuvulwa kwefilimu.

I-2 resin particle melting index (MI) ayikwazi ukuba nkulu kakhulu, inkomba yokuncibilika (MI) inkulu kakhulu, i-viscosity ye-resin encibilikisiwe incane kakhulu, uhla lokucubungula luncane, izimo zokucubungula zinzima ukulawula, ifilimu ye-resin impofu, akulula ukucubungula kufilimu;Ngaphezu kwalokho, inkomba yokuncibilika (MI) inkulu kakhulu, ukusabalalisa kwesisindo se-molecule ye-polymer kuncane kakhulu, futhi amandla efilimu mancane.Ngakho-ke, kufanele akhethe ncibilika Inkomba (MI) incane, futhi isihlobo amangqamuzana ukusatshalaliswa kwesisindo zokusetshenziswa ebanzi resin zokusetshenziswa, ukuze kuhlangatshezwane nezidingo ukusebenza ifilimu, kodwa futhi ukuqinisekisa ukucutshungulwa izici resin.Ifilimu yokubumba i-Blow polyethylene ngokuvamile isetshenziswa kunkomba yokuncibilika (MI) phakathi kuka-2 no-6g/10min wezinto zokusetshenziswa ze-polyethylene.

Inqubo ye-Blow Molding film icishe ibe kanjena:

I-Hopper yokulayisha i-plasticizing extrusion → i-blow traction → ukupholisa indandatho yomoya → i-herringlet splint → i-traction roll traction → ukwelashwa kwe-corona → ukugoqa kwefilimu