| 摘要 |
<p>PURPOSE:To improve the preservation of the content of a container, by forming the interior of the container body of the plastic mixed with light exclusion or ultraviolet absorbing material. CONSTITUTION:The inner peripheral edge 12 of an aluminum lid 11 of a container 10 is coated with a heat sealing compound 13 consisting of not less than one kind of the copolymers of modified polyolefin ionomer resin and ethylene acrylic acid. A flange 15 of a plastic container body 14 and the coated peripheral edge 12 of the metal lid 11 are, after being double seamed, heat-sealed together by high frequency or ultrasonic heating. The material for the plastic container body 14 have a sufficiency hardness and strength to withstand the double seaming and a laminated sheet consisting chiefly of olefins resin and polypropylene is used. As light exclusion material, flake aluminum or additive such as calcium carbonate is used. As for ultraviolet absorbing material, UV cutting agent is used.</p> |
