Gummed paper

Patent metadata

Field	Value
Publication number	US-11459487-B2
Application number	US-201816197207-A
Country	US
Kind code	B2
Filing date	Nov 20, 2018
Priority date	Nov 23, 2017
Publication date	Oct 4, 2022
Grant date	Oct 4, 2022

Abstract

A gummed paper comprises a first substrate having an uncovered region on an upper surface thereof; and a second substrate, in which in a thickness direction, a projection of the second substrate partially covers a projection of the first substrate, a dyne value of an upper surface of the second substrate is greater than or equal to 40 dyn/cm, and a dyne value of the uncovered region is less than the dyne value of the upper surface of the second substrate.

First claim

What is claimed is:

1. A gummed paper, comprising:
a first substrate, having an uncovered region on an upper surface thereof;
a second substrate; and
a second adhesive layer, located between the first substrate and the second substrate, and configured to adhere the first substrate to the second substrate,
wherein in a thickness direction of the gummed paper, a projection of the second substrate partially covers a projection of the first substrate, a projection of the second adhesive layer is within the projection of the second substrate and outside the uncovered region of the upper surface of the first substrate, a second dyne value of an upper surface of the second substrate is greater than or equal to 40 dyn/cm, and a first dyne value of the uncovered region of the upper surface of the first substrate is less than 40 dyn/cm,
the gummed paper further comprising a plurality of foaming agent particles distributed in a first adhesive layer adhered to a lower surface of the first substrate, and
the gummed paper is configured to receive a coating material on both the upper surface of the second substrate and the uncovered region of the upper surface of the first substrate, and a difference of between the second dyne value of the upper surface of the second substrate and the first dyne value of the uncovered region of the upper surface of the first substrate causes a movement of the coating material on the uncovered region of the upper surface of the first substrate towards the upper surface of the second substrate,
when the gummed paper is subjected to heat, the plurality of foaming agent particles are foamed, two edges of the first substrate in a width direction of the gummed paper are curled towards a middle part of the first substrate such that the two edges of the first adhesive layer in the width direction are peeled off an object to leave a void in the coating material that has flat and smooth edges because of the movement of the coating material from the uncovered region of the upper surface of the first substrate towards the upper surface of the second substrate, and the two edges of the first adhesive layer is configured to jack up the coating material at a periphery of the void.

2. The gummed paper according to claim 1 , wherein
in the width direction of the gummed paper, an edge of the second substrate is within an edge of the first substrate corresponding to the edge of the second substrate, an edge of the second adhesive layer is within an edge of the second substrate corresponding to the edge of the second adhesive layer; and
in a length direction of the gummed paper, an edge of at least one side of the second substrate is within an edge of the first substrate corresponding to the edge of at least one side of the second substrate, an edge of at least one side of the second adhesive layer is within an edge of the second substrate corresponding to the edge of at least one side of the second adhesive layer.

3. The gummed paper according to claim 1 , wherein the uncovered region of the upper surface of the first substrate is fluorinated, or coated with silicone oil, or both fluorinated and coated with silicone oil.

4. The gummed paper according to claim 1 , wherein a distance R between an edge of the first substrate and an edge of the second substrate corresponding to the edge of the first substrate is less than or equal to 20 mm.

5. The gummed paper according to claim 1 , wherein a width of the first adhesive layer is equal to that of the first substrate, and a length of the first adhesive layer is equal to that of the first substrate; or
a width of the second adhesive layer is equal to that of the second substrate, and a length of the second adhesive layer is equal to that of the second substrate; or
the width of the first adhesive layer is equal to that of the first substrate, the length of the first adhesive layer is equal to that of the first substrate, and the width of the second adhesive layer is equal to that of the second substrate, the length of the second adhesive layer is equal to that of the second substrate.

6. The gummed paper according to claim 1 , further comprising a notch disposed in the width direction of the second substrate, wherein the notch cuts through the first substrate and cuts into the first adhesive layer in the thickness direction, and a depth of the notch is less than or equal to a total thickness of the first substrate and the first adhesive layer.

7. The gummed paper according to claim 6 , wherein the notch in the width direction cuts through the second substrate and cuts into the second adhesive layer, the first substrate and the first adhesive layer, and the depth of the notch is less than or equal to a total thickness of the second substrate, the second adhesive layer, the first substrate and the first adhesive layer.

8. The gummed paper according to claim 2 , wherein a width of the first adhesive layer is equal to that of the first substrate, and a length of the first adhesive layer is equal to that of the first substrate; or
a width of the second adhesive layer is equal to that of the second substrate, and a length of the second adhesive layer is equal to that of the second substrate; or
the width of the first adhesive layer is equal to that of the first substrate, the length of the first adhesive layer is equal to that of the first substrate, and the width of the second adhesive layer is equal to that of the second substrate, the length of the second adhesive layer is equal to that of the second substrate.

9. The gummed paper according to claim 2 , further comprising a notch disposed in the width direction of the second substrate, wherein the notch cuts through the first substrate and cuts into the first adhesive layer in the thickness direction, and a depth of the notch is less than or equal to a total thickness of the first substrate and the first adhesive layer.

10. The gummed paper according to claim 9 , wherein the notch disposed in the width direction of the second substrate cuts through the second substrate and cuts into the second adhesive layer, the first substrate and the first adhesive layer, and the depth of the notch is less than or equal to a total thickness of the second substrate, the second adhesive layer, the first substrate and the first adhesive layer.

11. The gummed paper according to claim 1 , wherein four edges of the second substrate are within edges of the first substrate corresponding to the four edges of the second substrate, and four edges of the second adhesive layer are within edges of the second substrate corresponding to the four edges of the second adhesive layer.

12. The gummed paper according to claim 1 , wherein the upper surface of the second substrate is subjected to a corona treatment.

13. The gummed paper according to claim 1 , wherein the first adhesive layer has a thickness ranging from 10 μm to 40 μm, the first substrate has a thickness ranging from 2 μm to 20 μm, the second adhesive layer has a thickness ranging from 10 μm to 40 μm, and the second substrate has a thickness ranging from 2 μm to 20 μm.

14. The gummed paper according to claim 1 , wherein the first substrate comprises at least one selected from a group of aluminum foil, copper foil, tin foil, nickel foil, silver foil, plastic optical fiber, polyvinyl chloride, polypropylene, polyimide, or a combination thereof.

15. The gummed paper according to claim 1 , wherein the second substrate comprises at least one selected from a group of polyester resin, plastic optical fiber, polyvinyl chloride, polypropylene, polyimide, or a combination thereof.

16. Th

Assignees

• Ningde Amperex Technology Ltd

Inventors

• Dai Zhifang
• Zhang Luran
• Long Hai
• Tao Xinghua

Classifications

• C09J7/35

  Heat-activated · CPC title

• C09J7/29 Primary

  Laminated material (metallised plastics C09J7/22) · CPC title

• C09J2301/408

  additives as essential feature of the adhesive layer · CPC title

• C09J2433/00

  Presence of (meth)acrylic polymer · CPC title

• B32B2405/00

  Adhesive articles, e.g. adhesive tapes · CPC title