초록 ▼

In a container for a photographic film cartridge having a body and a cap fitted to said body, the improvement comprising that said cap is molded from a resin containing more than 20% by weight of a low-pressure linear low-density polyethylene which is a copolymer of ethylene and butene-1 and has a d

In a container for a photographic film cartridge having a body and a cap fitted to said body, the improvement comprising that said cap is molded from a resin containing more than 20% by weight of a low-pressure linear low-density polyethylene which is a copolymer of ethylene and butene-1 and has a density of 0.90 to 0.93 g/cm3 and a melt index of 8 to 60 g/10 minutes. In the case of the molding resin for the cap of the invention, heat resistance is high, and this resin smoothly flow in a molding machine though temperature of the molten resin is relatively low. Accordingly, coloring troubles hardly occur, and molding cycle can be shortened. This resin is also superior in injection moldability, and molding troubles such as roping, camber, kink and deformation are rare. Mold shrinkage is also little. Since fitting strength of the cap and container body is large, the cap is scarcely detached during packaging process. Water vapor permeability of the resin of the cap is little, and moistureproofness of the container is high.

대표청구항 ▼

In a container sized and constructed for holding a 35 millimeter photographic film cartridge, said container having a body and cap fitted to said body, the improvement comprising that said cap is molded from a resin containing 0.001 to 1 wt % of a phenol oxidation inhibitor and more than 20% by weig

In a container sized and constructed for holding a 35 millimeter photographic film cartridge, said container having a body and cap fitted to said body, the improvement comprising that said cap is molded from a resin containing 0.001 to 1 wt % of a phenol oxidation inhibitor and more than 20% by weight of a low-pressure linear low-density polyethylene which is a copolymer of ethylene and butene-1 and having a density of 0.90 to 0.93 g/cm3 and a melt index of 8 to 60 g/10 minutes.