Method and a quick-opening wrapping for objects
AssigneeGenerale de Grandes Sources
InventorGeorges Cathala
Life of this patent
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Abstract
The invention relates to a method of making a quick-opening wrapping for packaging objects, characterized in that it comprises the following steps: an embrittling agent is added to at least one extrudable plastics material; a monolayer film is made from said composition by monoextrusion; and said objects are surrounded at least in part by a portion of said film, and tear initiator means are provided in said portion of the film whereby it is possible to tear said wrapping in the direction that is predetermined by said initiator.
Claims13
A method of making a quick-opening wrapping for packing objects, comprising the steps of:
- preparing a composition by adding an embrittling agent to at least one extrudable plastics material, the concentration by weight of said embrittling agent being within the range of 5% to 30%;
- monoextruding said composition by blow extrusion with a take-off ratio within the range of 1.5 to 30 and a blow-up ratio within the range of 1.5 to 5, whereby the extruded film is tearable in the extrusion direction and in a direction orthogonal to the extrusion direction;
- and
- surrounding at least in part said objects by a portion of said film, and providing tear initiator means in said portion of said film whereby it is possible to tear said wrapping in the direction that is predetermined by said initiator.
A method of making a quick-opening wrapping for packing objects, comprising the steps of:
- preparing a composition by adding an embrittling agent to at least one extrudable plastics material, the concentration by weight of said embrittling agent being within the range of 15% to 25%;
- monoextruding said composition by blow extrusion with a take-off ratio within the range of 1.5 to 30 and a blow-up ratio with in the range of 1.5 to 10, whereby the extruded film is tearable in the extrusion direction and in a direction orthogonal to the extrusion direction;
- and
- surrounding at least in part said objects by a portion of said film, and providing tear initiator means in said portion of said film whereby it is possible to tear said wrapping in the direction that is predetermined by said initiator.
Dependencies are inferred from the claim text.