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US 11,260,645 B2Granted
Method for manufacturing packaging sheet
OwnerHo Chil Kiminventor
Life of this patent
Estimating the term…
Abstract
A method of manufacturing a packaging sheet, the method being capable of not only greatly improving a heat insulation property of the packaging sheet, but also minimizing the volume of cells of the packaging sheet without opening the cells by cutting or needle-punching the cells, thereby facilitating storage and transportation of the packaging sheets while significantly reducing logistics costs.
Claims7
A method of manufacturing a packaging sheet, the method comprising:
- forming a cell sheet by bonding a flat lower side film to a formed film having a plurality of cells arranged at regular intervals;
- perforating each of the plurality of cells of the cell sheet;
- partially bonding a flat finishing sheet onto the plurality of cells of the cell sheet;
- and
- winding the cell sheet partially bonded to the flat finishing sheet on an outer surface of a winding roller,
- wherein the perforating comprises:
- applying an adhesive to a part of each of the plurality of cells;
- and
- perforating a part of each of the plurality of cells where the adhesive is not applied,
- wherein the partially bonding is performed by allowing the cell sheet and the flat finishing sheet to pass through a pair of rotary rollers so that the cell sheet and the flat finishing sheet are partially bonded to each other while the cell sheet and the flat finishing sheet are compressed.
7 more elements
A method of manufacturing a packaging sheet, the method comprising:
- forming a first and a second cell sheets by bonding a flat lower side film to a formed film having a plurality of cells arranged at regular intervals;
- perforating each of the plurality of cells of each of the first and the second cell sheets;
- partially bonding the first and the second cell sheets to each other;
- and
- winding the bonded first and second cell sheets on an outer surface of a winding roller,
- wherein the perforating comprises:
- applying an adhesive to a part of each of the plurality of cells of each of the first and the second cell sheets;
- and
- perforating a part of each of the plurality of cells of each of the first and the second cell sheets where the adhesive is not applied,
- wherein the partially bonding is performed by allowing the first and the second cell sheets to pass through a pair of rotary rollers so that the first and the second cell sheets are partially bonded to each other while the first and the second cell sheets are compressed.
7 more elements
Dependencies are inferred from the claim text.