| 摘要 |
A method for covering and sealing an opening in a container. The method employs a polyolefin-based stretch film which is free of adhesive and has a softening temperature in excess of 100 DEG C. At least one surface of the film having an upper and lower surface is substantially free of constituents which can dissolve in, or react with an organic solvent or a caustic agent. The method includes the steps of: (i) providing a portion of the film which covers the container opening, (ii) stretching the film using a mechanical force in a direction generally parallel to the principal axis of the container opening, and (iii) releasing the force and allowing the film to contract around the container opening to provide a liquid-tight seal over the opening.
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