| 摘要 |
PURPOSE:To heat-seal and connect a resin film for stretching and a connecting piece made of a resin for the connection of said film positively even when resins of a different kind are used as materials by employing the resin film, connecting end sections thereof are each formed to a specific shape, and the connecting piece. CONSTITUTION:The concave sections of U-shaped sections constituted by holding section t, t' are formed to the end sections of tabular bodies consisting of a soft resin (such as a vinyl chloride resin, polyethylene) and the connecting pieces H are formed while a plurality of through-holes h are formed at the end sections of the films consisting of a rigid resin (such as polyester, an acryl resin) and the resin films (f) for stretching are formed. The end sections of the films (f) are inserted and fitted into the recessed sections of the connecting pieces H, the connecting sections are heated by high frequency and the soft resin of the connecting pieces H is melted and flowed in and filled in the through holes (h), the films (f) and the connecting pieces H are joined strongly, and a suitable film material used for stretch as an outer wall for the hothouse is formed. |
