Wrapper for aerosol generating article and method of manufacturing same

Patent metadata

Field	Value
Publication number	US-12490765-B2
Application number	US-202117775452-A
Country	US
Kind code	B2
Filing date	Oct 13, 2021
Priority date	Oct 15, 2020
Publication date	Dec 9, 2025
Grant date	Dec 9, 2025

Abstract

A method of manufacturing a wrapper for an aerosol generating article includes applying an adhesive to one surface of a metal layer and attaching a first paper layer thereto, applying the adhesive to the other surface of the metal layer and attaching thereto a second paper layer different from the first paper layer, and drying the adhesive applied between the metal layer and the first paper layer and the adhesive applied between the metal layer and the second paper layer.

First claim

The invention claimed is:

1 . A method of manufacturing a wrapper for an aerosol generating article, the method comprising:
attaching a first paper layer to one surface of a metal layer using an adhesive; attaching a second paper layer to another surface of the metal layer using the adhesive; drying the adhesive applied between the metal layer and the first paper layer; and drying the adhesive applied between the metal layer and the second paper layer, wherein a width of the first paper layer and a width of the second paper layer are respectively greater than a width of the metal layer, wherein the first paper layer and the second paper layer extend beyond both edges of the metal layer in the width direction, and wherein the width of the first paper layer is a same width as the width of the second paper layer.

2 . The method of claim 1 , wherein the drying of the adhesive applied between the metal layer and the first paper layer is performed before the second paper layer is attached to the other surface of the metal layer using the adhesive.

3 . The method of claim 1 , wherein the drying of the adhesive between the metal layer and the first paper layer and the drying of the adhesive between the metal layer and the second paper layer are performed with hot air at a temperature of 60° C. to 75° C.

4 . The method of claim 1 , wherein the drying of the adhesive between the metal layer and the first paper layer and the drying of the adhesive between the metal layer and the second paper layer are performed with hot air at a temperature of 63° C. to 67° C.

5 . The method of claim 1 , wherein the metal layer includes any one of aluminum (Al), gold (Au), and silver (Ag).

6 . The method of claim 1 , wherein the metal layer has a thickness of 6.3 μm to 20 μm.

7 . The method of claim 1 , wherein the metal layer has a thickness of 15 μm to 20 μm.

8 . The method of claim 1 , wherein basis weights of the first paper layer and the second paper layer range from 16 g/m 2 to 35 g/m 2 .

9 . The method of claim 1 , wherein a basis weight of the first paper layer is different from a basis weight of the second paper layer.

10 . The method of claim 9 , wherein the basis weight of the first paper layer is 16 g/m 2 , and the basis weight of the second paper layer is 35 g/m 2 .

11 . The method of claim 1 , wherein the adhesive is an ethylene-vinyl acetate copolymer (EVA).

12 . The method of claim 11 , wherein the adhesive has a solid content of at least 60%.

Assignees

• Kt & G Corp

Inventors

• Ahn Ki-Jin
• Kim Jong Yeol
• Kim Soo Ho
• Ma Kyengbae
• Seo Man Seok
• Yang Jin Chul
• Cheong Bong Su

Classifications

• B31F5/04

  by exclusive use of adhesives · CPC title

• A24D1/045

  with smoke filter means (A24D1/047 takes precedence) · CPC title

• B32B37/12

  characterised by using adhesives · CPC title

• B32B7/12

  using interposed adhesives or interposed materials with bonding properties · CPC title

• B32B15/12

  of paper or cardboard · CPC title