Kupanga zinthu ndondomeko
Stretch Film ndi mtundu wazinthu zonyamula zomwe zimagwiritsidwa ntchito limodzi ndi makina okhotakhota, omwe amagwiritsidwa ntchito kuyika zinthu kuti ziyende mosavuta.M'masiku oyambilira, mafilimu otambasulidwa a LLDPE anali mafilimu omwe amawombedwa kwambiri, ndipo adapangidwa kuchokera pagawo limodzi kupita kumagulu awiri ndi magawo atatu.Ndi chitukuko cha zachuma, filimu ya LDPE yakhala yaikulu pamsika.
Kutentha kwa Sungunulani filimu anatambasula ambiri ankalamulira pa 250 ℃ ~ 280 ℃, kutentha kwa kuponyera kuzirala mpukutu umalamuliridwa pa 20 ℃ ~ 30 ℃, ndi yokhotakhota mavuto ayenera kukhala otsika, zambiri mkati 10kg, kuti atsogolere kukhuthala. wothandizira Tulukani pochepetsa kupsinjika kwamkati kwa filimu yomalizidwa.Izi ndizomwe zimapangidwira kupanga.
Kuwongolera kumata
Kukhuthala kwabwino kumapangitsa kuti filimu yolongedza ndi zigawo zakunja kwa katundu zigwirizane kuti katunduyo akhale wolimba.Pali njira ziwiri zazikulu zopezera mamasukidwe akayendedwe: imodzi ndikuwonjezera PIB kapena masterbatch yake ku polima;ina ndikuphatikiza VLDPE .PIB ndi translucent viscous fluid, zida zapadera kapena kusinthidwa kwa zida kumafunika kuti muwonjezere mwachindunji, ndipo PIB masterbatch imagwiritsidwa ntchito nthawi zambiri.Pali njira yosinthira PIB, yomwe nthawi zambiri imatenga masiku atatu, komanso imakhudzidwa ndi kutentha.Kutentha kukakhala kokwera, kukhuthala kwake kumakhala kolimba;pamene kutentha kuli kochepa, sikumamatira kwambiri, ndipo kukhuthala kumachepetsedwa kwambiri mutatha kutambasula.Choncho, filimu yomalizidwayo imasungidwa bwino mumtundu wina wa kutentha (kutentha kosungirako ndi 15 ℃ ~ 25 ℃).Kuphatikizidwa ndi VLDPE, kukhuthala kwake kumakhala koyipa pang'ono, koma palibe chofunikira chapadera pazida.Kukhuthala kwake kumakhala kokhazikika, sikuyendetsedwa ndi nthawi, komanso kumakhudzidwa ndi kutentha.Kutentha kumakhala kowoneka bwino ngati kutentha kuli kopitilira 30 ° C, ndipo mamasukidwe akayendedwe amakhala oyipa pang'ono ngati kutentha kuli kotsika kuposa 15 ° C.Sinthani kuchuluka kwa LLDPE pazomata kuti mukwaniritse kukhuthala komwe mukufuna.Njirayi imagwiritsidwa ntchito kwambiri pamagulu atatu a co-extrusion.