JPWO2020150012A5

JPWO2020150012A5 -

Info

Publication number: JPWO2020150012A5
Application number: JP2021541638A
Authority: JP
Publication date: 2023-01-20
Anticipated expiration: 2040-01-03

Claims

A coated paperboard container comprising:
a paperboard substrate;
a heat-sealable aqueous barrier coating on the paperboard substrate, the heat-sealable aqueous barrier coating comprising a pigment mixture and a binder ;
with
The coated paperboard container has a repulpable yield of Accept of 75% or greater ;
The repulpability yield was measured using an AMC Maelstom repulper, 110 grams of coated paperboard cut into 1 inch by 1 inch squares was treated with 2895 grams of water (6.5±0. pH of 5, 50°C), soaked for 15 minutes, then repulped for 30 minutes; The rejects and fiber accepts (captured by the vibrating flat screen) are collected, dried and weighed; the percentage of accepts is calculated based on the weight of the accepts and rejects, 100% is fully repulpable and
the coated paperboard container has a wet stiffness loss of 50% or less ;
Wet stiffness is measured using a Perseco cup stiffness tester, and the wet stiffness loss is the percentage change in stiffness comparing the dry stiffness of the coated paperboard container to the wet stiffness of the coated paperboard container. A coated paperboard container measured as

The coated paperboard container comprises:
having a repulpable yield of accepts of 80% or more;
Has a repulpable yield of accepts of 85% or more, or
2. The coated paperboard container of claim 1 having a repulpable yield of accepts of 90% or greater .

The coated paperboard container comprises:
having a sidewall seam bond strength of 30 pounds per inch or greater;
Have a sidewall seam bond strength of 40 pounds per inch or greater, or
3. The coated paperboard container of claim 1 or 2 having a sidewall seam bond strength of 50 pounds per inch or greater .

The coated paperboard container comprises:
having a wet stiffness loss of 40% or less,
having a wet stiffness loss of 30% or less,
has a wet stiffness loss of 20% or less, or
having a wet stiffness loss of 10% or less,
and/or the coated paperboard container comprising:
having a 30 min-water-Cobb test of 20 g/m ² or less,
Has a 30 min-water-Cobb test of 10 g/m ² or less, or
A coated paperboard container according to any one of claims 1 to 3 , having a 30 min-water-Cobb test of 5 g/m ² or less.

The coated paperboard container comprises:
having a dyeing brightness loss of 20% or less,
have a loss of staining brightness of 10% or less, or
having a dyeing brightness loss of 5% or less,
and/or the coated paperboard container comprising:
having a blocking rate of 3.5 or less;
have a blocking rate of 3.0 or less, or
5. The coated paperboard container of any one of claims 1-4 , having a blocking rate of 2.0 or less .

The coated paperboard container has a fiber tear of 80% or more when the seam of the paperboard container is separated, or
6. The coated paperboard container of any one of claims 1-5 , having a fiber tear of 90% or more when the seam of the paperboard container is separated .

The paperboard substrate comprises an inwardly facing inner surface of the paperboard container and an outwardly facing outer surface of the paperboard container, a top edge, a bottom edge, and a first longitudinal edge, which form the side walls of the paperboard container. , and a sidewall paperboard substrate having a second longitudinal end ;
the heat-sealable aqueous barrier coating on the paperboard substrate comprises a first aqueous barrier coating on the inner surface of the sidewall paperboard substrate;
The first longitudinal edge of the sidewall paperboard substrate is heat-sealed with the first aqueous barrier coating to the second longitudinal edge of the sidewall paperboard substrate to form a sidewall seam. death,
7. The coated paperboard container of any one of claims 1-6 for holding hot beverages, wherein the coated paperboard container has a sidewall seam bond strength of 30 pounds per inch or more and a wet stiffness loss of 20% or less. A coated paperboard container as described.

The paperboard substrate further comprises a bottom stock paperboard substrate having an inner surface facing inwardly of the paperboard container and an outer surface facing outwardly of the paperboard container to provide a bottom wall of the paperboard container. ,
the heat-sealable aqueous barrier coating on the paperboard substrate further comprising an aqueous barrier coating on the inner surface of the bottom stock paperboard substrate;
a circumferential portion of the bottom stock paperboard substrate is heat-sealed to the bottom edge of the sidewall paperboard substrate by at least one of the aqueous barrier coating on the sidewall and the aqueous barrier coating on the bottom wall; A coated paperboard container for holding hot beverages according to claim 7 .

9. The coated paperboard container for holding hot beverages of claim 8 , further comprising a non-barrier coating on the outer surface of said bottomstock paperboard substrate.

9. The coated paperboard container for holding hot beverages of claim 8 , further comprising a second aqueous barrier coating on the outer surface of said bottomstock paperboard substrate.

11. The coated paperboard container for holding hot beverages of claim 10 , further comprising a non-barrier coating on the second aqueous barrier coating.

The paperboard substrate comprises an inwardly facing inner surface of the paperboard container and an outwardly facing outer surface of the paperboard container, a top edge, a bottom edge, and a first longitudinal edge, which form the side walls of the paperboard container. , and a sidewall paperboard substrate having a second longitudinal end ;
The heat-sealable aqueous barrier coating on the paperboard substrate comprises:
a first aqueous barrier coating on the inner surface of the sidewall paperboard substrate;
a second aqueous barrier coating on the outer surface of the sidewall paperboard substrate;
with
Said first longitudinal edge of said sidewall paperboard substrate is protected from said second longitudinal edge of said sidewall paperboard substrate by at least one of said first aqueous barrier coating and said second aqueous barrier coating. to form a sidewall seam;
7. The coated paperboard container of any one of claims 1-6 for holding cold beverages, wherein the coated paperboard container has a sidewall seam bond strength of 30 pounds per inch or greater.

13. The coated paperboard container for holding cold beverages of claim 12 , further comprising a non-barrier coating on said second aqueous barrier coating on said outer surface of said sidewall paperboard substrate.

The paperboard substrate further comprises a bottom stock paperboard substrate having an inner surface facing inwardly of the paperboard container and an outer surface facing outwardly of the paperboard container forming a bottom wall of the paperboard container. ,
The heat-sealable aqueous barrier coating on the paperboard substrate comprises a first aqueous barrier coating on the interior surface of the bottomstock paperboard substrate and a second aqueous barrier coating on the exterior surface of the bottomstock paperboard substrate. with an aqueous barrier coating of
Circumferential portions of the bottom stock paperboard substrate comprise the first aqueous barrier coating on the sidewall, the second aqueous barrier coating on the sidewall, the first aqueous barrier coating on the bottom wall, and the bottom. 14. The coated for holding cold beverages of claim 12 or 13 , wherein at least one of the second aqueous barrier coatings of the walls is heat-sealed to the bottom edge of the sidewall paperboard substrate. paperboard container.

The bottom edge of the sidewall paperboard substrate is folded inwardly of the coated paperboard container to form a circumferential recess, and the circumferential edge of the bottom stock paperboard substrate is folded toward the outer surface of the coated paperboard container. 12. According to any one of claims 8 to 11, folded to form a circumferential lip, and wherein said circumferential lip of the bottom wall is located in said circumferential recess of said side wall. A coated paperboard container for holding a hot beverage as claimed in claim 12 or a coated paperboard container for holding a cold beverage as claimed in any one of claims 12 to 14 .