Sealing label

Patent metadata

Field	Value
Publication number	US-9501958-B2
Application number	US-201414580276-A
Country	US
Kind code	B2
Filing date	Dec 23, 2014
Priority date	Dec 23, 2014
Publication date	Nov 22, 2016
Grant date	Nov 22, 2016

Abstract

A sealing label suitable for sealing a package made of varnished cardboard comprises:
a carrier layer, and an adhesive layer,

wherein the thickness of the carrier layer, the material of the carrier layer, and the composition of the adhesive layer have been selected such that:
a minimum deformation force of the label is smaller than a first breaking force needed to break the cardboard material of the varnished cardboard, a minimum detaching force of the label is greater than the first breaking force, and the minimum detaching force is smaller than a second breaking force needed to break the label,

wherein the first breaking force is a first pulling force which causes breaking of the cardboard material in a situation where the label is separated from the varnished cardboard by pulling the label with said first pulling force, and the minimum detaching force is a second pulling force which is needed to separate the adhesive layer of the label from the surface of the varnished cardboard in a situation where the label is pulled with said second pulling force.

First claim

What is claimed is:

1. A label suitable for use on a varnished cardboard, the label comprising:
a carrier layer, and
an adhesive layer,

wherein the thickness of the carrier layer, the material of the carrier layer, and the composition of the adhesive layer have been selected such that:
a minimum deformation force of the label is smaller than a first breaking force needed to break the cardboard material of the varnished cardboard,
a minimum detaching force of the label is greater than the first breaking force, and
the minimum detaching force is smaller than a second breaking force needed to break the label,

wherein the first breaking force is a first pulling force which causes breaking of the cardboard material in a situation where the label is separated from the varnished cardboard by pulling the label with said first pulling force, and the minimum detaching force is a second pulling force which is needed to separate the label from the outer surface of the varnished cardboard in a situation where the label is pulled with said second pulling force.

2. The label of claim 1 comprising one or more visually detectable stretching indicators.

3. The label of claim 1 wherein a first dimension of a stretching indicator is substantially equal to a second dimension of said stretching indicator so as to allow visual comparison of the first dimension with the second dimension.

4. The label of claim 1 wherein the label has a substantially smooth and continuous carrier layer.

5. The label of claim 1 wherein the elongation at break of the carrier layer is higher than or equal to 450%.

6. The label of claim 1 wherein the carrier layer comprises polypropylene.

7. The label of claim 1 , wherein the label does not comprise an incision or perforated part.

8. A combination of a label and a package, wherein the package comprises varnished cardboard, the label has been attached to the package such that an opening joint is located between two attachment regions of the label, the label comprising:
a carrier layer, and
an adhesive layer,

wherein the thickness of the carrier layer, the material of the carrier layer, and the composition of the adhesive layer have been selected such that:
a minimum deformation force of the label is smaller than a first breaking force needed to break the cardboard material of the varnished cardboard,
a minimum detaching force of the label is greater than the first breaking force, and
the minimum detaching force is smaller than a second breaking force needed to break the label,

wherein the first breaking force is a first pulling force which causes breaking of the cardboard material in a situation where the label is separated from the varnished cardboard by pulling the label with said first pulling force, and the minimum detaching force is a second pulling force which is needed to separate the label from the outer surface of the varnished cardboard in a situation where the label is pulled with said second pulling force.

9. The combination of claim 8 wherein the opening joint can be opened by breaking the label without causing visually detectable damage to the package.

10. The combination of claim 8 wherein the opening joint cannot be opened without causing visually detectable damage to the package.

11. The combination of claim 8 wherein the package comprises a further opening portion, which is arranged to be opened by breaking the package.

12. The combination of claim 8 wherein the package contains a substance selected from the group consisting of medicine, cosmetic product, and foodstuff.

13. A web, comprising:
a carrier layer, and
an adhesive layer,

wherein the thickness of the carrier layer, the material of the carrier layer, and the composition of the adhesive layer have been selected such that:
a minimum deformation stress value of the carrier layer is smaller than a minimum breaking stress value of the carrier layer,
a minimum detaching stress value of the carrier layer is greater than the minimum breaking stress value of the carrier layer, and
the minimum detaching stress value of the carrier layer is smaller than the tensile strength of the carrier layer,

wherein the minimum deformation stress value is the stress of the carrier layer in a situation where a label cut from the web is pulled by a pulling force, which causes 30% final elongation of the carrier layer; the minimum breaking stress value is the stress of the carrier layer in a situation where a label cut from the web is separated from varnished cardboard by a pulling force, which causes breaking of the cardboard material; and the minimum detaching stress value is the stress of the carrier layer in a situation where a label cut from the web is separated from the surface of a varnished cardboard by a pulling force.

14. The web of claim 13 comprising a plurality of visually detectable stretching indicators.

15. The web of claim 13 wherein a first dimension of a stretching indicator is substantially equal to a second dimension of said stretching indicator so as to allow visual comparison of the first dimension with the second dimension.

16. The web of claim 13 wherein the elongation at break of the carrier layer is higher than or equal to 450%.

17. The web of claim 13 wherein the carrier layer comprises polypropylene.

Assignees

• Upm Raflatac Oy

Inventors

• Pietarinen Markku
• Herranen Jari

Classifications

• G09F2003/0226

  Carrier sheet · CPC title

• G09F2003/0277

  Tamper resistant · CPC title

• C09J2423/106

  in the substrate · CPC title

• G09F2003/0245

  Differential adhesive strength · CPC title

• B65D55/026

  initial opening or unauthorised access being indicated by a visual change using indicators other than tearable means, e.g. change of colour, pattern or opacity (B65D55/066 takes precedence) · CPC title