| 摘要 |
<p>An easy-open composite container is disclosed having an unbonded helical butt joint that extends the length of the container, characterized by the provision of an impervious inner liner layer having a helical folded portion which is coextensive with and extends the length of the unbonded butt joint. A peelable outer reinforcing or wrapper layer bonded to the outer surface of the fibrous body wall layer normally holds the edges of the butt joint together. Upon removal of the outer reinforcing layer, the ends of the container may be twisted in opposite directions to open the unbonded butt joint and to expand and rupture the inner liner layer folded portion. In the case where products under pressure, such as refrigerated dough products, are packaged in the container, upon removal of the outer reinforcing layer, the products expand to automatically open the butt joint and to expand and rupture the inner liner folded portion. If desired, the folded inner liner portion may have a creased fold line that defines a line of weakness, and/or the folded portion may be adhered to the corresponding inner surface by an adhesive having a relatively low coefficient of adhesion.</p> |
