TW202348413A - Double-layer foam paper container and method to manufacture double-layer foam paper container - Google Patents

Abstract

A method to manufacture double-layer foam paper container includes steps of: coating a first foam material on a wall of the a paper container; coating a second foam material on an outer face of the first foam material wherein the blow points of the first foam material and the second foam material have 3 degrees difference; heating the paper container to make the first foam material and the second foam material foamed in different time to form a first foam layer and a second foam layer.

Description

Double-layer foam paper container structure and double-layer foam paper container manufacturing method

The invention relates to a foam paper container and its preparation method.

It is known that paper containers used to hold hot drinks are often provided with a foam material with a certain thickness on the outer wall of the paper container to achieve a heat insulation effect so that the user can hold it. The result of foaming will affect the heat insulation effect, for example, it will be more fluffy. , Thicker foam material can achieve better thermal insulation effect, but less dense and fine foam material is not conducive to printing, or printing can easily damage the foam layer structure, thus affecting the thermal insulation effect and yield.

In addition, cold drinks are usually packed in ordinary paper containers. Users may easily suffer from frostbite if they hold them for a long time. Cold drinks also tend to increase in temperature and become colder. Moreover, water droplets tend to condense on the outer wall of the paper container, and the water droplets further soak the paper container, causing the paper to become colder. The container is softened and damaged and needs improvement.

On the other hand, when coating foam material in a single pass, in order to achieve the required thermal insulation effect, the coating thickness is relatively thick, and drying is extremely time-consuming. To speed up the drying speed, the temperature needs to be increased. However, high temperatures may deform the paper. And if they are not completely dried (the outer layer is dry but the inner layer is not yet completely dry), paper containers may stick to each other when stacked on top of each other.

Therefore, it is necessary to improve how to provide paper containers that have good thermal insulation effect, are easy to print and are not easily soaked by water droplets.

The main purpose of the present invention is to provide a double-layer foam paper container structure and a method for making a double-layer foam paper container, which can provide a foam layer with heat insulation effect, waterproof effect and printing effect, and is suitable for different uses of hot and cold drinks.

In order to achieve the above object, the present invention provides a double-layer foam paper container structure, including a paper container body, a first foam layer and a second foam layer.

The paper container body has an annular wall that surrounds a containing space; the first foaming layer is disposed on at least part of the annular wall; the second foaming layer is disposed on the first foaming layer facing away from the paper container At least a partial area of one side of the main body; wherein, after at least a partial area of the ring wall of the paper container body is coated with a first foaming material, a second foaming material is further coated on at least a partial area of the first foaming material, The foaming temperature of the first foaming material is at least 3 degrees lower than the foaming temperature of the second foaming material. The first foaming material and the second foaming material respectively form the first foaming material after heating and foaming. bubble layer and the second foam layer.

In order to achieve the above object, the present invention also provides a double-layer foam paper container structure, including a paper container body, a first foam layer and a second foam layer.

The paper container body has an annular wall that surrounds a containing space; the first foaming layer is disposed on at least part of the annular wall; the second foaming layer is disposed on the first foaming layer facing away from the paper container At least a partial area of one side of the main body; wherein, after at least a partial area of the ring wall of the paper container body is coated with a first foaming material, a second foaming material is further coated on at least a partial area of the first foaming material, The foaming temperature of the first foaming material is at least 3 degrees higher than the foaming temperature of the second foaming material. The first foaming material and the second foaming material respectively form the first foaming material after heating and foaming. bubble layer and the second foam layer.

In order to achieve the above object, the present invention also provides a method for making a double-layer foam paper container, which includes the following steps:

Coating the first foaming material: Coating a first foaming material on at least part of the circumferential wall of the paper container body; Coating the second foaming material: Coating at least one side of the first foaming material facing away from the paper container body Partial area is coated with a second foaming material, wherein the foaming temperature of the first foaming material is at least 3 degrees lower than the foaming temperature of the second foaming material; heating foaming: heating the paper container body to make The first foam material is first foamed and expanded to become a first foam layer, and then the second foam material is foamed and expanded to become a second foam layer.

In order to achieve the above object, the present invention also provides a method for making a double-layer foam paper container, which includes the following steps:

Coating the first foaming material: Coating a first foaming material on at least part of the circumferential wall of the paper container body; Coating the second foaming material: Coating at least one side of the first foaming material facing away from the paper container body Partial area is coated with a second foaming material, wherein the foaming temperature of the first foaming material is at least 3 degrees higher than the foaming temperature of the second foaming material; heating foaming: heating the paper container body to make The second foam material is first foamed and expanded to become a second foam layer, and then the first foam material is foamed and expanded to become a first foam layer.

The following examples are only used to illustrate the possible implementation modes of the present invention, but are not intended to limit the scope of protection of the present invention.

Please refer to Figures 1 to 4. The present invention provides a double-layer foam paper container structure, including a paper container body 10, a first foam layer 21a and a second foam layer 22a.

The paper container body 10 has an annular wall 11 surrounding a containing space; the first foam layer 21a is provided on at least part of the annular wall 11; the second foam layer 22a is provided on the first foam layer 21a is at least a partial area of the side facing away from the paper container body 10; wherein, after at least a partial area of the ring wall 11 of the paper container body 10 is coated with a first foaming material 21, it is further coated with the first foaming material 21 At least a part of the area is coated with a second foaming material 22. The foaming temperature of the first foaming material 21 is at least 3 degrees lower than the foaming temperature of the second foaming material 22. The first foaming material 21 and the third foaming material 22 are The two foaming materials 22 are heated and foamed to form the first foaming layer 21a and the second foaming layer 22a respectively. Preferably, a printing layer is printed on the side of the second foam layer facing away from the first foam layer.

The invention also provides a method for making a double-layer foam paper container, which includes the following steps:

Coating the first foaming material: Coating a first foaming material 21 on at least part of the circumferential wall 11 of the paper container body 10 .

Coating the second foaming material: Coating a second foaming material 22 on at least part of the side of the first foaming material 21 facing away from the paper container body 10, wherein the foaming temperature of the first foaming material 21 is at least low. The foaming temperature of the second foaming material 22 is 3 degrees.

Heating and foaming: The paper container body 10 is heated, so that the first foaming material 21 first foams and expands to become a first foaming layer 21a, and then the second foaming material 22 foams and expands to become a first foaming layer 21a. Two foam layers 22a. Preferably, a printing layer is printed on the side of the second foam layer facing away from the first foam layer.

In this way, the first foaming layer foams and expands earlier and faster, and can expand thicker and fluffier, and has an excellent heat insulation effect on the hot drinks in the paper container body, while the second foaming layer Slower foaming and expansion, its thickness is thinner but its texture is fine and dense. It is very suitable for further printing a printing layer on it. It is also suitable for directly forming a printing foaming layer with pigment particles itself. Therefore, in this embodiment, it can be provided Paper containers with good thermal insulation and printing effects are particularly suitable for holding hot drinks.

In another embodiment of the present invention, as shown in Figures 2, 5, and 6, the present invention provides a double-layer foam paper container structure, including a paper container body 10, a first foam layer 21b and a second Foam layer 22b.

The paper container body 10 has an annular wall 11 to surround a containing space; the first foam layer 21b is provided on at least part of the annular wall 11; the second foam layer 22b is provided on the first foam layer 21b is at least a partial area of the side facing away from the paper container body 10; wherein, after at least a partial area of the ring wall 11 of the paper container body 10 is coated with a first foaming material 21, it is further coated with the first foaming material 21 At least a part of the area is coated with a second foaming material 22. The foaming temperature of the first foaming material 21 is at least 3 degrees higher than the foaming temperature of the second foaming material 22. The first foaming material 21 and the third foaming material 22 are The two foaming materials 22 are heated and foamed to form the first foaming layer 21b and the second foaming layer 22b respectively.

The invention also provides a method for making a double-layer foam paper container, which includes the following steps:

Coating the first foaming material: Coating a first foaming material 21 on at least part of the circumferential wall 11 of the paper container body 10 .

Coating the second foaming material: Coating a second foaming material 22 on at least part of the side of the first foaming material 21 facing away from the paper container body 10, wherein the foaming temperature of the first foaming material 21 is at least higher than The foaming temperature of the second foaming material 22 is 3 degrees.

Heating and foaming: The paper container body 10 is heated, so that the second foam material 22 is first foamed and expanded to become a second foam layer 22b, and then the first foam material 21 is foamed and expanded to become a first foam layer 22b. A foam layer 21b.

Thereby, the first foaming layer expands slowly and has a smaller thickness but a fine and dense texture. When it is directly attached to the ring wall of the paper container, it can prevent the water droplets on the outer wall from condensing and soaking the paper container when holding cold drinks. The structure becomes soft, etc., and the first foam layer has a large contact area with the paper, strong adhesion and is not easy to fall off, and the second foam layer isolates room temperature and cold drinks on the outside, further improving the cold preservation effect.

To sum up, the double-layer foam paper container provided by the present invention has different foaming results under the same foaming conditions due to the different foaming temperatures of the two foaming layers, and thus has different thicknesses and different textures. , the different needs of the inner and outer layers can be met separately, and cold and hot drinks can be packed in the most suitable paper containers respectively, which has the advantages of heat preservation (cold), prevention of water droplet condensation and soaking, and good printing effect; in addition, it is coated in two times The foam material can make the thickness of each foam layer extremely thin, making the drying speed faster and the temperature not needing to be too high, which can increase the production speed.

10: Paper container body 11: Ring wall 21: First foam material 22: Second foam material 21a, 21b: first foaming layer 22a, 22b: second foam layer

Figure 1 is a perspective view of the present invention. Figure 2 is a cross-sectional view of the present invention before foaming. Figure 3 is a cross-sectional view of the first embodiment of the present invention. Figure 4 is a schematic diagram of the foaming process of the first embodiment of the present invention. Figure 5 is a cross-sectional view of the second embodiment of the present invention. Figure 6 is a schematic diagram of the foaming process of the second embodiment of the present invention.

10: Paper container body

11: Ring wall

21a: First foaming layer

22a: Second foam layer

Claims (6)

A double-layer foam paper container structure, including: A paper container body has a ring wall surrounding a storage space; A first foam layer, the first foam layer is provided in at least part of the circumferential wall; A second foam layer, the second foam layer is provided on at least part of the area of the side of the first foam layer facing away from the paper container body; Wherein, after at least a partial area of the ring wall of the paper container body is coated with a first foaming material, a second foaming material is further coated on at least a partial area of the first foaming material. The foaming temperature is at least 3 degrees lower than the foaming temperature of the second foaming material. The first foaming material and the second foaming material are heated and foamed to form the first foaming layer and the second foaming layer respectively. layer. The double-layer foam paper container structure as claimed in claim 1, wherein a printing layer is printed on the side of the second foam layer facing away from the first foam layer. A double-layer foam paper container structure, including: A paper container body has a ring wall surrounding a storage space; A first foam layer, the first foam layer is provided in at least part of the circumferential wall; A second foam layer, the second foam layer is provided on at least part of the area of the side of the first foam layer facing away from the paper container body; Wherein, after at least a partial area of the ring wall of the paper container body is coated with a first foaming material, a second foaming material is further coated on at least a partial area of the first foaming material. The foaming temperature is at least 3 degrees higher than the foaming temperature of the second foaming material. The first foaming material and the second foaming material are heated and foamed to form the first foaming layer and the second foaming material respectively. layer. A method for making a double-layer foam paper container, including the following steps: Coating the first foaming material: Coating a first foaming material on at least a partial area of an annular wall of a paper container body; Coating the second foaming material: Coating a second foaming material on at least part of the surface of the first foaming material facing away from the paper container body, wherein the foaming temperature of the first foaming material is at least lower than that of the second foaming material. The foaming temperature of foaming materials is 3 degrees; Heating and foaming: The paper container body is heated, so that the first foaming material first foams and expands to become a first foaming layer, and then the second foaming material foams and expands to become a second foaming layer. . The method of making a double-layer foam paper container as claimed in claim 4, wherein a printing layer is printed on the side of the second foam layer facing away from the first foam layer. A method for making a double-layer foam paper container, including the following steps: Coating the first foaming material: coating a first foaming material on at least a partial area of an annular wall of a paper container body; Coating the second foaming material: Coating a second foaming material on at least part of the surface of the first foaming material facing away from the paper container body, wherein the foaming temperature of the first foaming material is at least higher than that of the second foaming material. The foaming temperature of foaming materials is 3 degrees; Heating and foaming: The paper container body is heated, so that the second foaming material first foams and expands to become a second foaming layer, and then the first foaming material foams and expands to become a first foaming layer. .

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