Cov txheej txheem cam khwb cia rau stretch qhwv yog ib txoj hauv kev tsim cov yeeb yaj kiab los ntawm yaj extrusion, tiaj tus- tuag casting, thiab txias ceev. Siv cov linear low-density polyethylene (LLDPE) ua cov khoom siv raw, cov yas pellets yog yaj thiab sib npaug ntawm cov extruder mus rau lub tiaj tiaj. Cov yas molten ua ib zaj duab xis txuas ntxiv, uas yog tom qab ntawd teeb tsa los ntawm cov menyuam txias los tsim cov ntaub qhwv nrog cov tuab tuab thiab kev ua haujlwm ruaj khov.
Cov txheej txheem tsim khoom suav nrog kev faib ua feem thiab sib xyaw cov ntaub ntawv raw, nrog rau kev ua haujlwm ntxiv -xws li tackifiers thiab antistatic agents- suav nrog raws li cov khoom tshwj xeeb. Cov khoom sib tov nkag mus rau hauv qhov system extrusion, qhov twg nws yog cov yas kom huv si ntawm qhov kub thiab txias kom ua tiav cov yam ntxwv zoo ntws. Tom qab ntawd, cov khoom molten yog extruded los ntawm precision tuag los ua ib daim ntawv -zoo li zaj duab xis ntawm uniform thickness, nteg lub hauv paus rau kev ua tom ntej.
Cov yeeb yaj kiab extruded tam sim ntawd nkag mus rau qhov txias thiab teeb tsa theem; Kev kub ceev txo los ntawm kev txias rollers stabilizes cov qauv zaj duab xis thiab txhim kho qhov gloss thiab flatness. Cov yeeb yaj kiab yog tom qab ntawd ncab thiab hloov kho siv lub traction unit los txhim kho nws cov qauv molecular, yog li txhim kho tensile lub zog, elastic rov qab, thiab tsim kua muag. Ib txhij, ib qho hauv - kab tuab saib xyuas qhov system ua kom cov khoom sib xws los ntawm kev taug qab tuab hauv lub sijhawm.
Tom qab teeb tsa, cov yeeb yaj kiab tau dhau los ntawm ntug trimming, kho saum npoo, winding, thiab ntim khoom los tsim cov cam khwb cia zaum kawg. Cov txheej txheem casting yog tus cwj pwm los ntawm kev ua haujlwm siab, qib siab ntawm automation, thiab cov yeeb yaj kiab zoo ib yam. Nws tso cai rau kev tswj hwm qhov tuab thiab kev ua tau zoo, ua rau muaj kev sib tw qhwv uas muaj cov pob tshab zoo, tus kheej -adhesion, thiab ntim ntau yam- ua rau nws siv dav hauv kev xa khoom, pallet wrapping, thiab kev tiv thaiv kev lag luam.