TRUSTWORTHY FILMS!
Sleeve - polyethylene film, formed tube-like, folded and coiled in a roll
Half sleeve - polyethylene film, formed tube-like, folded, cut on one side at the bend and coiled in a roll
Canvas - single layer of film, with predefined width, coiled in a roll
Fold - polyethylene film, formed tube-like with symmetric side inserts on both sides, coiled in a roll
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The calculations are presented for standard film with density of 0,920 g/cm³.
Calculated mass is not including the limit deviation of thickness, according to GOST 10354-82; 25951-83.
ALL CALCULATIONS ARE APPROXIMATE.