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US 9,731,488 B2Granted
Method for laminating a tubular film
AssigneeBuergofol GmbH
InventorKurt Stark
Life of this patent
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Abstract
The invention refers to a method for laminating a tubular film (1) preferably manufactured by means of blown film (co-) extrusion with a material capable of absorbing resin or liquids, wherein the tubular film (1) is laminated over its entire perimeter with several layers (10, 11, 12, 13; 20, 21, 22; 30, 31) overlapping or positioned directly opposite one another on their front sides containing material capable of absorbing resin or liquids, so that essentially there are no areas left along the perimeter of the tubular film (1) not covered by the laminated layers (10, 11, 12, 13; 20, 21, 22; 30, 31). The invention also refers to a tubular film laminated in such a way and to various applications.
Claims15
A method for laminating a tubular film with a liquid or resin absorbing material, comprising:
- laminating the tubular film over its entire perimeter with a plurality of separate layers of the liquid or resin absorbing material (“absorbing material layers”) in such a manner that (a) no single absorbent material layer completely encircles the perimeter of the tubular film, (b) a first absorbent material layer partially encircles the perimeter of the tubular film, (c) one or more additional absorbent material layers are used to cover the perimeter of the tubular film between lateral sides of the first absorbent material layer;
- and (d) the absorbent material layers are bonded to the tubular film or to each other by the laminating step;
- the absorbing material layers overlap along adjacent lateral sides so that there are essentially no areas left along the perimeter of the tubular film that are not covered by the absorbing material layers;
- and
- in an initial flat state wherein the tubular film has a first side and a second side defined between opposite lateral edges, the tubular film is laminated on the first side with a first absorbing material layer with an excess length that extends beyond at least one of the folded lateral edges, the tubular film laminated on the second side with a second absorbing material layer.
2 more elements
A method for laminating a tubular film with a liquid or resin absorbing material, comprising:
- laminating the tubular film over its entire perimeter with a plurality of separate layers of the liquid or resin absorbing material (“absorbing material layers”) in such a manner that (a) no single absorbent material layer completely encircles the perimeter of the tubular film, (b) a first absorbent material layer partially encircles the perimeter of the tubular film, (c) one or more additional absorbent material layers are used to cover the perimeter of the tubular film between lateral sides of the first absorbent material layer;
- and (d) the absorbent material layers are bonded to the tubular film or to each other by the laminating step;
- the absorbing material layers overlap along adjacent lateral sides so that there are essentially no areas left along the perimeter of the tubular film that are not covered by the absorbing material layers;
- and further comprising:
- a) in an initial flat state wherein the tubular film has a top side and a bottom side defined between opposite lateral edges, the tubular film is first laminated on each of the top side and bottom side with a first and a second absorbing material layer, respectively;
- b) the tubular film is brought to a second flat state by turning or rolling the tubular film such that a new top side is formed containing an unfolded one of the lateral edges and a new bottom side is formed containing an unfolded one of the lateral edges, the unfolded lateral edges lying opposite one another;
- c) in the second flat state, the tubular film is laminated with a third absorbing material layer on the new top side that extends over the unfolded lateral edge and overlaps the first absorbing material layer, and laminated with a fourth absorbing material layer on the new bottom side that extends over the unfolded lateral edge and overlaps the second absorbing material layer;
- and
- d) wherein a width of the third and fourth absorbing material layers is less than a width of the first and second absorbing material layers.
6 more elements
A method for laminating a tubular film with a liquid or resin absorbing material, comprising:
- laminating the tubular film over its entire perimeter with a plurality of separate layers of the liquid or resin absorbing material (“absorbing material layers”) in such a manner that (a) no single absorbent material layer completely encircles the perimeter of the tubular film, (b) a first absorbent material layer partially encircles the perimeter of the tubular film, (c) one or more additional absorbent material layers are used to cover the perimeter of the tubular film between lateral sides of the first absorbent material layer;
- and (d) the absorbent material layers are bonded to the tubular film or to each other by the laminating step;
- the absorbing material layers overlap along adjacent lateral sides so that there are essentially no areas left along the perimeter of the tubular film that are not covered by the absorbing material layers;
- and further comprising:
- a) in an initial flat state wherein the tubular film has a top side and a bottom side defined between opposite lateral edges, the tubular film is first laminated on one of the top side or bottom side with a first absorbing material layer;
- b) the tubular film is brought to a second flat state by turning or rolling the tubular film by an angle greater than 90° such that a new top side and a new bottom side are defined, one of the new top side or new bottom side having less of the laminated first absorbing material layer than the other respective new bottom side or new top side;
- c) in the second flat state, the tubular film is laminated on the new top side or new bottom side having less of the laminated first absorbing material layer with a second absorbing material layer that overlaps the first absorbing material layer;
- d) the tubular film is brought to a third flat state by turning or rolling the tubular film by an angle greater than 90° so that an unlaminated area of the tubular film is laid out flat along another new top side or bottom side;
- and
- e) in the third flat state, the unlaminated area is laminated with a third absorbing material layer that overlaps the first and the second absorbing material layers.
7 more elements
Dependencies are inferred from the claim text.