WO2022246671A1

WO2022246671A1 - Paper container and manufacturing method therefor

Info

Publication number: WO2022246671A1
Application number: PCT/CN2021/095904
Authority: WO
Inventors: 张静文
Original assignee: 张静文
Priority date: 2021-05-26
Filing date: 2021-05-26
Publication date: 2022-12-01

Abstract

The present application relates to a paper container and a manufacturing method therefor, the manufacturing method comprising the following steps: preparing a paper material; covering a surface of the paper material with a first film layer to form a substrate; cutting the substrate to form a body; partially removing one end of the body in a thickness direction to form a notch portion and a thin board portion, wherein the notch portion and the first film layer are located on two opposite sides of the body; coating the thin board portion with an adhesive material, and folding and connecting the thin board portion toward/to the notch portion to form a fold edge; and bending the body and connecting an exposed portion of the fold edge to a joint portion of the body to form the paper container, wherein the first film layer faces the interior of the paper container. Further provided in the present application is a paper container, comprising: a body, which encloses an internal space, wherein one end of the body extends to provide a thin board portion, and the thin board portion is folded away from the internal space to form a fold edge. In this way, the effects of effectively preventing liquid leakage and being aesthetically pleasing can be achieved.

Description

Paper container and manufacturing method thereof

technical field

This application is related to containers, in particular to a paper container and its manufacturing method.

Background technique

Existing paper containers, such as paper cups, are formed by stacking and bonding the opposite ends of the paper after a paper roll is rolled into a tube. The inner and outer surfaces are coated with a coating layer to increase the structural strength. In detail, the inner film layer of the paper cup needs to be in contact with food, so it should have better heat resistance and acid and alkali resistance to avoid decomposition and release toxins; the outer film layer of the paper cup only needs to provide appropriate Waterproof and anti-abrasion effects, so the outer coating layer is usually made of cheaper materials to save manufacturing costs.

However, since the materials of the inner film layer and the outer film layer are different, the bonding strength after heating is not good, and even cannot be bonded, so an adhesive is needed to bond each other to increase the thickness of the joint And cause disadvantages such as poor aesthetics, complicated process and increased production cost. In addition, since the cut edge of the paper is not covered by the coating layer, it is easy to contact with the liquid in the paper container, and then absorbs water and softens, resulting in that the joint cannot be tightly connected and there is a possibility of liquid leakage.

Therefore, it is necessary to provide a novel and progressive paper container and its manufacturing method to solve the above-mentioned problems.

application content

The main purpose of the present application is to provide a paper container and its manufacturing method, which can effectively prevent liquid leakage and have good aesthetics.

In order to achieve the above object, the application provides a method for manufacturing a paper container, comprising the following steps: preparing a paper material; coating a first film layer on a surface of the paper material to form a base material; cutting the base material to form a body; partially remove one end of the body along a thickness direction to form a notch and a thin plate portion, the notch and the first film layer are located on opposite sides of the body; apply a glue Folding and connecting the thin plate portion toward the notch to form a hem; and bending the body and connecting the hem to a joint portion of the body to form the paper container, wherein the first The film layer faces into the paper container.

As an optional embodiment of the present application, a second film layer is additionally coated on a surface of the paper material opposite to the first film layer, wherein the first film layer and the second film layer are made of different materials.

As an optional embodiment of the present application, wherein a thickness of the thin plate portion is not greater than 2/3 of a thickness of the base material.

As an optional embodiment of the present application, a thickness of the folded edge is not greater than 1.5 times a thickness of the base material.

As an optional embodiment of the present application, wherein the body includes a first end and a second end opposite to each other, the flange is located at the first end, the joint is located at the second end, and the first end and the second end are The second ends approach each other and roll the body into a cylindrical shape.

As an optional embodiment of the present application, a second film layer is additionally coated on a surface of the paper material opposite to the first film layer, wherein the materials of the first film layer and the second film layer are different; A depth of the recessed portion is greater than a thickness of the second film layer; a thickness of the thin plate portion is not greater than 2/3 of a thickness of the base material; a thickness of the hem is not greater than 2/3 of the thickness of the base material 1.5 times; the manufacturing method of the paper container further includes the steps of: pressing a fold line on the thin plate part; the folded and connected part of the thin plate part is the paper material; the exposed part of the folded edge and the joint part are both the first film layer; the material of the first film layer is selected from at least one of polypropylene and polyethylene terephthalate; One end surface of the part abuts against the cut surface. In order to achieve the above purpose, the present application also provides a paper container, including: a body, enclosing an inner space, including a paper material and a first film layer covering a surface of the paper material, one end of the body A thin plate portion is extended, and the thin plate portion is folded relatively toward a side away from the internal space to form a folded edge, the folded edge includes a first section and a second section overlapping in the thickness direction, the There is an adhesive material between the first section and the second section.

As an optional embodiment of the present application, wherein a thickness of the folded edge is not greater than 1.5 times a thickness of the main body.

As an optional embodiment of the present application, an end surface of the first section abuts against the paper material along a length extending direction of the main body.

Description of drawings

FIG. 1 is a flow chart of the steps of a preferred embodiment of the present application.

FIG. 2 is a schematic diagram of cutting to form a body according to a preferred embodiment of the present application.

FIG. 3 is a schematic view of the main body forming a thin plate portion according to a preferred embodiment of the present application.

FIG. 4 is a schematic diagram of forming a folded edge of the body according to a preferred embodiment of the present application.

FIG. 5 is a perspective view of the body forming the hem according to a preferred embodiment of the present application.

Fig. 6 is a perspective view of a preferred embodiment of the present application.

Fig. 7 is a partially enlarged view of a preferred embodiment of the present application.

In the picture:

1: body; 10: paper material; 20: first film layer; 30: recessed part; 31: cut surface; 40: thin plate part; 41: folding edge; 411: first section; 412: second section; 42: Fold line; 50: junction; 60: second film layer; 70: adhesive material; 80: first end; 90: second end; 100: substrate; C: inner space; S1-S6: steps.

Detailed ways

The application will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the application and implement it, but the examples given are not intended to limit the application.

Please refer to Figures 1 to 7, which show a preferred embodiment of the present application. The manufacturing method of the paper container of the present application includes the following steps: Step S1: Prepare a paper material 10; Step S2: Cover a first film layer 20 Form a base material 100 on a surface of the paper material 10; step S3: cut the base material 100 to form a body 1, as shown in Figure 2, the base material 100 can cut out a number of the body 1; step S4: Partially remove one end of the body 1 along a thickness direction to form a notch 30 and a thin plate portion 40, the notch 30 and the first film layer 20 are located on opposite sides of the body 1; step S5: apply an adhesive material 70 on the thin plate portion 40 and fold and connect the thin plate portion 40 toward the notch portion 30 to form a folded edge 41; and step S6: bend the body 1 and connect the folded edge 41 with the folded edge 41 A joint portion 50 of the main body 1 is connected to form the paper container, wherein the first film layer 20 faces inward of the paper container. Through the above steps, the folded edge 41 can prevent the paper material 10 from contacting the liquid in the paper container, effectively preventing leakage, and the notch 30 can avoid the thickness of the joint between the folded edge 41 and the joint portion 50 Oversized for aesthetics.

In the step S2, it is preferable to further coat a second film layer 60 on a surface of the paper 10 opposite to the first film layer 20, wherein the materials of the first film layer 20 and the second film layer 60 different. In detail, the material of the first film layer 20 is at least one selected from polypropylene (Polypropylene, PP) and polyethylene terephthalate (Polyethylene terephthalate, PET), which can provide a good waterproof effect and keep the The paper material 10 is flexible, heat-resistant and chemically stable; the second film layer 60 can be, for example, polyethylene (PE), which has good transparency, easy processing and low cost, and can increase the wear resistance of the paper container consumption and avoid softening of the paper 10.

In the step S4 , the depth of the notch portion 30 is greater than the thickness of the second film layer 60 , that is, at least part of the paper material 10 is removed, so as to effectively reduce the thickness of the thin plate portion 40 . Preferably, the thickness of the thin plate part 40 is not greater than 2/3 of the thickness of the base material 100; the thickness of the folded edge 41 is not greater than 1.5 times the thickness of the base material 100, so as to avoid the joint between the folded edge 41 and the The thickness of the connected parts 50 is too large, and the appearance is good.

Preferably, before the step S5 , a folding line 42 is press-set on the thin plate portion 40 to facilitate bending the thin plate portion 40 . In the step S5, the folded and connected part of the thin plate part 40 is the paper material 10, which can be stably fixed by the adhesive material 70; 31 , one end surface of the thin plate portion 40 abuts against the cut surface 31 , as shown in FIG. 4 , which can prevent the paper material 10 from being exposed and has a good anti-leakage effect.

In this embodiment, the paper container is a paper cup, the body 1 is the body of the paper cup and includes a first end 80 and a second end 90 opposite to each other, the folded edge 41 is located at the first end 80, the The joint part 50 is located at the second end 90. In the step S6, the first end 80 and the second end 90 are approached to each other and the body 1 is rolled into a cylindrical shape, as shown in FIG. 5 and FIG. 6, the structure Simple. With reference to FIG. 7 , both the exposed portion of the folded edge 41 and the joint portion 50 are the first film layer 20 , which can be welded, for example, by heating without using an additional adhesive. The same material can provide better joint strength, which is convenient Processing and cost saving. In other embodiments, the paper container can also be, for example, a bento box, a paper box, a paper bag, and the like.

The present application further provides a paper container, comprising: the main body 1 enclosing an inner space C, including the paper material 10 and the first film layer 20 covering a surface of the paper material 10, the main body 1 One end is extended with the thin plate portion 40 , the thin plate portion 40 is folded relatively toward the side away from the inner space C by the paper material 10 to form the folded edge 41 , the thickness of the folded edge 41 is not greater than 10% of the thickness of the main body 1 1.5 times. In this embodiment, the paper container is manufactured using the above-mentioned method; the folded edge 41 includes a first section 411 and a second section 412 overlapping in the thickness direction, and the first section 411 and the second section The adhesive material 70 is provided between the sections 412, and the bonding strength is good. One end surface of the first section 411 abuts against the paper material 10 along the length extending direction of the main body 1 , which is easy to process and can prevent the paper material 10 from being exposed, and has a good anti-leakage effect.

The above-mentioned embodiments are only preferred embodiments for fully describing the present application, and the protection scope of the present application is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present application are all within the protection scope of the present application. The protection scope of the present application shall be determined by the claims.

Claims

A method for manufacturing a paper container, comprising the steps of:

Prepare a piece of paper;

coating a first film layer on a surface of the paper to form a substrate;

cutting the substrate to form a body;

One end of the main body is partially removed along a thickness direction to form a notch and a thin plate part, the notch and the first film layer are located on two opposite sides of the main body;

coating an adhesive material on the thin plate part and folding and connecting the thin plate part toward the notch to form a hem; and

The main body is bent and the folded edge is connected with a joint portion of the main body to form the paper container, wherein the first film layer faces inward of the paper container.
The manufacturing method of the paper container according to claim 1, further covering a second film layer on a surface of the paper material opposite to the first film layer, wherein the materials of the first film layer and the second film layer different.
The paper container as claimed in claim 1, wherein a thickness of the thin plate part is not more than 2/3 of a thickness of the base material.
The method for manufacturing a paper container as claimed in claim 1, wherein a thickness of the folded edge is not greater than 1.5 times a thickness of the base material.
The manufacturing method of the paper container according to claim 1, wherein the main body includes a first end and a second end opposite to each other, the folded edge is located at the first end, the joint is located at the second end, and the second end is located at the second end. One end and the second end are close to each other and roll the body into a cylindrical shape.
The manufacturing method of the paper container according to claim 5, further covering a second film layer on a surface of the paper material opposite to the first film layer, wherein the materials of the first film layer and the second film layer Different; a depth of the recessed portion is greater than a thickness of the second film layer; a thickness of the thin plate portion is not greater than 2/3 of a thickness of the base material; a thickness of the hem is not greater than the base material 1.5 times the thickness of the paper container; the manufacturing method of the paper container further includes the steps of: setting a fold line on the thin plate part; the folded and connected part of the thin plate part is the paper material; a first film layer; the material of the first film layer is at least one selected from polypropylene and polyethylene terephthalate; and the notch includes a cut surface transverse to a length extending direction of the body, One end surface of the thin plate portion is brought into contact with the cut surface.
A paper container comprising:

A body, enclosing an internal space, including a paper material and a first film layer covering the paper material and facing the internal space, a thin plate part is extended from one end of the main body, and the thin plate part is opposite to the paper material Fold toward the side away from the internal space to form a hem, the hem includes a first section and a second section overlapping in the thickness direction, an adhesive material is arranged between the first section and the second section .
The paper container as claimed in claim 7, wherein a thickness of the folded edge is not greater than 1.5 times a thickness of the main body.
The paper container according to claim 7, wherein an end surface of the first section abuts against the paper material along a length extending direction of the main body.