Firimu rekutambanudza rinowanikwa muukobvu hwakasiyana uye upamhi hwakasiyana kuti rikwane zvinodiwa zvakasiyana-siyana zvekuputira uye mhando dzezvinhu.
Ukobvu hunowanzoonekwa muma microns kana gauge, ukobvu hwema stretch film hwakajairwa huri 12-30 microns(μm) kana 50 gauge - 120 gaude.
Upamhi hunowanzova pakati pemainchi 30 kusvika 50 (30 kusvika 50 cm) uye hunogona kugadziriswa zvichienderana nezvinodiwa.
Ukobvu:
Kukora kwakasiyana kunopa simba rakasiyana uye dziviriro.
Mafirimu akakora, akadai se20-35 μm (80-140 gauge), akakodzera zvinhu zvinorema kana zvakapinza, zvichipa simba rekudzivirira kuboorwa, firimu rinoita kuti ikwanise kutakura zvinhu zvinorema.
Mafirimu matete, akadai se10-15 microns (40-90 gauge), akanakira zvinhu zvakareruka kana kana mari inoshandiswa zvakanyanya.
Upamhi:
Firimu rekutambanudza rinouya nehupamhi hwakasiyana, kazhinji 12 inches (30 cm) kusvika 20 inches (50 cm).
Kusarudzwa kwehupamhi kunoenderana nehukuru uye saizi yezvinhu zviri kuputirwa.
Sarudzai kuti zvinhu zvikuru kana muchirongedza zvinhu zvikuru kana kuti zvakakura kuti zvive zvakafara uye zvigare zvakanaka.
Maitiro Ekuverenga Zvinodiwa zveStretch Film
| Kuverenga Huremu | Kuverenga Hurefu |
| Kurema = Kureba (m) * ukobvu (um) * upamhi (cm) * 0.918 | Kureba = Huremu(kg) / ukobvu(um) / upamhi(cm) / 0.918 |
| Ipa Muenzaniso: | |
| Kureba kwe550m, ukobvu hwe22um, upamhi hwe50CM, huremu hwacho hunosvika 5.5 kgs. (550*0.022*0.5*0.918=5.5) | |
| Huremu hwe3 kgs, ukobvu hwe22um, upamhi hwe50CM, kureba kwacho kunosvika 297m. (3/0.022/0.5/0.918=297) | |












