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Thermoplastics tse ngata li ka fepeloa tlhahiso ea filimi ka ho bopa ho otla, ho phunya filimi ea polasetiki ke ho petetsa ka har'a tube e tšesaane, ebe e otla ka moea o hatelitsoeng ho letsa bulge ea polasetiki, ka mor'a ho pholile ho phethela moralo oa lihlahisoa tsa lera la tubula, mofuta ona oa ts'ebetso ea filimi lipakeng tsa. filimi e shebileng le filimi e otlollang: matla a molemo ho feta filimi e otlolohileng, ho tiisa mocheso ho mpe ho feta filimi e otlolohileng.

Ho na le mefuta e mengata ea lifilimi tse hlahisoang ke mokhoa oa ho bopa, joalo kapolyethylene e tlase haholo (LDPE), linear polyethylene (LLDPE), polypropylene (PP), high density polyethylene (HDPE), nylon (PA), ethylene ethylene acetate copolymer (EVA), joalo-joalo Mona re kenyelletsa ka bokhutšoanyane ts'ebetso ea tlhahiso ea ho phunya ea lifilimi tse sebelisoang hangata tsa LDPE le LLDPE .

1. Thepa e tala e khethiloeng e lokela ho phahamisoa likaroloana tsa resin ea filimi ea polyethylene, e nang le tekanyo e nepahetseng ea moemeli oa boreleli, ho netefatsa ho buloa ha filimi.

2 resin particle melting index (MI) ha e khone ho ba kholo haholo, melting index (MI) e kholo haholo, viscosity ea resin e qhibilihisitsoeng e nyane haholo, sebaka sa ho sebetsa se moqotetsane, maemo a ho sebetsa a thata ho laola, filimi ea resin e futsanehile, ha ho bonolo ho e etsa filimi;Ho phaella moo, melting index (MI) e kholo haholo, tekanyo ea boima ba molek'hule ea polymer e moqotetsane haholo, 'me matla a filimi a fokola.Ka hona, lokela ho khetha qhibiliha index (MI) e nyenyane, 'me lekanyelitsoeng limolek'hule kabo ea thepa e pharaletseng ea resin tala, e le ho finyella litlhoko tsa tshebetso ya filimi, empa hape ho etsa bonnete ba ho sebetsa litšobotsi tsa resin.Filimi ea Blow molding polyethylene hangata e sebelisoa ho melting index (MI) lipakeng tsa 2 le 6g/10min polyethylene raw.

Ts'ebetso ea ho bopa filimi e batla e le ka tsela e latelang:

Hopper loading materializing extrusion → blow traction → moea ring pholile → herringlet splint → traction roll traction → kalafo ea corona → moea o pholileng