THE VINYL FILM OF GREENHOUSE

摘要

PURPOSE: A vinyl film is provided to prevent a continuous cut in a part which is not thermally sealed even though the vinyl film is cut in a longitudinal direction on an edge of a thermally sealed attachment unit. CONSTITUTION: A vinyl film for plastic greenhouse is classified into an upper film(12) and a lower film(11). A wing vinyl film(16) is formed by thermally sealing the upper and lower films. The wing vinyl film includes an attachment unit and a connecting unit. The attachment unit is formed at a predetermined distance toward a edge of the upper and lower films from a fold(15) in which the upper and lower films are folded. A connecting unit is formed between attachment parts. The wing vinyl film is cut into multiple wings by separation units(18). The separation unit is formed in a straight line within a fusion portion for separation(17) where the upper and lower films are thermally sealed. The separation unit is formed as one per multiple attaching units, or one per multiple connecting parts, or one per each attaching unit or connecting part. The length of the wing vinyl film is varied according to the separation unit. The length of the attachment part or the connecting part is varied while the length of the wing vinyl is fixed.