Glassine paper material for wrapping self-adhesive note pads

Patent metadata

Field	Value
Publication number	US-12570873-B2
Application number	US-202218567849-A
Country	US
Kind code	B2
Filing date	Jun 9, 2022
Priority date	Jun 9, 2021
Publication date	Mar 10, 2026
Grant date	Mar 10, 2026

Abstract

The invention relates to a wrapping material ( 1 ) for wrapping an article ( 10 ), which is based on glassine paper with a grammage in the range of 25 to 50 g/m 2 , wherein the wrapping material ( 1 ) is present in the form of a web. The web has i. a first side face (S 1 ), ii. a second side face (S 2 ) situated opposite the first side face (S 1 ), iii. at least one web portion (B) having a first and a second outer region portion ( 2, 3 ) and inner region portions ( 4, 5, 6, 7, 8 ), wherein the inner region portions are arranged between the outer region portions ( 2, 3 ). A heat-sealable coating is applied to the glassine paper on at least one of the two side faces (S 1 , S 2 ) in at least one first outer coating region ( 2 a - 2 g ) in the first outer region portion ( 2 ) of the web portion (B). A heat-sealable coating is applied to the glassine paper on at least one of the two side faces (S 1 , S 2 ) in at least one second outer coating region ( 3 a - 3 g ) in the second outer region portion ( 3 ) of the web portion (B).

First claim

The invention claimed is:

1 . A wrapping material ( 1 ) based on glassine paper for wrapping an article ( 10 ), wherein the wrapping material ( 1 ) is present in the form of a web, and the web comprises:
i. a first side face (S 1 ), ii. a second side face (S 2 ) situated opposite the first side face (S 1 ), iii. at least one web portion (B) having a first and a second outer region portion ( 2 , 3 ) and inner region portions ( 4 , 5 , 6 , 7 , 8 ), wherein the inner region portions are arranged between the outer region portions ( 2 , 3 ), wherein
1) a heat-sealable coating is applied to the glassine paper on at least one of the two side faces (S 1 , S 2 ) in at least one first outer coating region ( 2 a - 2 g ) in the first outer region portion ( 2 ) of the web portion (B), and
2) a heat-sealable coating is applied to the glassine paper on at least one of the two side faces (S 1 , S 2 ) in at least one second outer coating region ( 3 a - 3 g ) in the second outer region portion ( 3 ) of the web portion (B),

wherein the glassine paper is characterized by a grammage (measured in the conditioned state of the samples at 23° C./50% RH) in the range of 25 to 50 g/m 2 .

2 . The wrapping material as claimed in claim 1 , characterized in that not all of the surface area of the first outer region portion and not all of the second outer region potion has a heat-sealable coating on the glassine paper, even though only one respective side of the respective outer region portion has a coating comprising the heat-sealable coating in the outer coating regions at all.

3 . The wrapping material as claimed in claim 1 , characterized in that it is present in the form of a rolled-up web.

4 . The wrapping material as claimed in claim 1 , characterized in that the heat-sealable coating is applied in the form of a water-based or solvent-based, heat-sealable-material-containing lacquer.

5 . The wrapping material as claimed in claim 1 , characterized in that the heat-sealable material of the heat-sealable coating is a vinyl chloride copolymer or vinyl chloride terpolymer or an ethylene-vinyl acetate copolymer.

6 . The wrapping material as claimed in claim 1 , characterized in that the heat-sealable coating is applied in an amount in the range of 2 to 12 g/m 2 .

7 . The wrapping material as claimed in claim 1 , characterized in that at least the first one of the two side faces (S 1 , S 2 ) in at least one first outer coating region ( 2 a - 2 g ) has a heat-sealable coating on the glassine paper in the first outer region portion ( 2 ) of the web portion (B), and at least the first one of the two side faces (S 1 , S 2 ) in at least one first outer coating region ( 3 a - 3 g ) has a heat-sealable coating on the glassine paper in the second outer region portion ( 3 ) of the web portion (B).

8 . The wrapping material as claimed in claim 7 , characterized in that at least one first outer coating region ( 2 a - 2 g ) has a heat-sealable coating on the glassine paper in the first outer region portion ( 2 ) of the web portion (B) on each of the two side faces (S 1 , S 2 ), and at least one second outer coating region ( 3 a - 3 g ) has a heat-sealable coating on the glassine paper in the second outer region portion ( 3 ) of the web portion (B) on each of the two side faces (S 1 , S 2 ),
wherein both side faces (S 1 , S 2 ) have a heat-sealable coating on the glassine paper in the first outer region portion ( 2 ) of the web portion (B) in at least one first outer coating region ( 2 a - 2 g ), and both side faces (S 1 , S 2 ) have a heat-sealable coating on the glassine paper in the second outer region portion ( 3 ) of the web portion (B) in at least one second outer coating region ( 3 a - 3 g ).

9 . The wrapping material as claimed in claim 1 , characterized in that the coating comprising the heat-sealable coating on the glassine paper in the first outer region portion ( 2 ) of the web portion (B) and the coating comprising the heat-sealable coating on the glassine paper in the second outer region portion ( 3 ) of the web portion (B) are mirror-symmetrical with respect to the center of the web portion (B) and a mirror plane perpendicular to the web.

10 . The wrapping material as claimed in claim 1 , characterized in that the first or the last inner region portion ( 4 , 8 ) of the web portion (B), or both, have a heat-sealable coating on the glassine paper in at least one first inner coating region ( 4 a - 4 d , 8 a - 8 d ).

11 . The wrapping material as claimed in claim 1 , wherein the heat-sealable coating is a water-based heat-sealable-material-containing lacquer and wherein the heat-sealable material of the heat-sealable coating is an ethylene-vinyl acetate copolymer.

12 . The wrapping material as claimed in claim 10 , wherein the first or the last inner region portion ( 4 , 8 ) of the web portion (B), or both, have a heat-sealable coating on the glassine paper in at least one second inner coating region ( 4 a - 4 d , 8 a - 8 d ).

13 . A wrapped article comprising the wrapping material as claimed in claim 1 and an article ( 10 ), the wrapping material comprises a coated and paper-based material, wherein the article ( 10 ) is a self-adhesive note pad or a multipack of 2 to 20 self-adhesive note pads.

14 . The wrapped article as claimed in claim 13 , characterized in that the multipack comprises self-adhesive note pads with the same color or with different colors.

15 . The wrapped article as claimed in claim 13 , characterized in that the self-adhesive note pad is a pad of adhesive strips.

16 . The wrapped article as claimed in claim 15 , wherein the pad of adhesive strips is at least partially encapsulated in a protective element made of cardboard.

17 . A method for producing the wrapping material as claimed in claim 1 , the method comprising
providing a web of glassine paper having a first side face (S 1 ) and a second side face (S 2 ) situated opposite the first side face (S 1 ) and coating the glassine paper with the heat-sealable coating
a. on at least one of the two side faces (S 1 , S 2 ) in at least one first outer coating region ( 2 a - 2 g ) in a first outer region portion ( 2 ) of the web portion (B), and
b. on at least one of the two side faces (S 1 , S 2 ) in at least one second outer coating region ( 3 a - 3 g ) in a second outer region portion ( 3 ) of the web portion (B).

18 . A wrapped article made of a coated and paper-based material, wrapped in a web portion (B) of the wrapping material as claimed in claim 1 .

19 . The method for wrapping an article ( 10 ) made of a coated and paper-based material in a wrapping material ( 1 ), wherein the method comprises the following steps:
providing the wrapping material ( 1 ) as claimed in claim 1 in the form of a web, feeding the wrapping material ( 1 ) to a separating device ( 100 ), cutting a web portion (B) of the web to a defined packaging length of the wrapping material ( 1 ) by means of the separating device ( 100 ), arranging the cut-to-length web portion (B) perpendicularly in relation to a conveying direction (F) of the article ( 10 ) to be wrapped, inserting the article ( 10 ) to be wrapped between two plates of a wrapping device ( 200 ) in the conveying direction (F) perpendicularly in relation to the cut-to-length web portion (B) and wrapping the cut-to-length web portion (B) by means of the wrapping device ( 200 ), folding the first and the second outer region portion ( 2 , 3 ) of the

Assignees

• Upm Raflatac Oy

Inventors

• Latz Henning
• Leichner Wolfgang
• Friederichs Olaf

Classifications

• D21H27/10

  Packing paper (packaging materials of special type or form B65D65/38) · CPC title

• D21H27/06 Primary

  Vegetable or imitation parchment; Glassine paper · CPC title

• D21H19/68

  uneven, broken, discontinuous · CPC title

• D21H19/12

  applied as a solution using water as the only solvent, e.g. in the presence of acid or alkaline compounds · CPC title

• C09J2400/286

  in the pretreated surface to be joined · CPC title