CN216334145U

CN216334145U - Heat-insulating paper container sleeve

Info

Publication number: CN216334145U
Application number: CN202122568854.8U
Authority: CN
Inventors: 曹继刚
Original assignee: Shanghai Zidan Packaging Technology Co ltd; Hubei Zidan Packaging Technology Co ltd
Current assignee: Shanghai Zidan Packaging Technology Co ltd; Hubei Zidan Packaging Technology Co ltd
Priority date: 2021-10-25
Filing date: 2021-10-25
Publication date: 2022-04-19
Anticipated expiration: 2031-10-25

Abstract

The utility model provides a heat-insulating paper container sleeve, wherein a first coating layer is arranged on the inner side surface of an annular paper substrate, and the first coating layer is a water-based foamable coating layer; the paper container sleeve is simple in manufacturing process and easy to realize industrial mass production, more importantly, the whole thickness and the whole volume of the paper container sleeve can be very small, the boxing and transportation space can be saved, and the transportation cost of the paper container sleeve is greatly reduced; in a specific use scene, a certain amount of water is only needed to be applied to the first coating layer on the inner side surface of the paper container, so that the first coating layer is redissolved, then the paper container is foamed, dried and solidified at a foaming temperature to form a foaming layer, and the foamed paper container sleeve can be sleeved on the outer wall surface of a container with a corresponding size, can play a role in heat insulation and preservation, can be used as a heat insulation outer packaging sleeve and is widely applied to containers for hot drinks, cold drinks and cold drinks.

Description

Heat-insulating paper container sleeve

Technical Field

The utility model relates to a heat-insulating paper container sleeve, and belongs to the technical field of packaging materials.

Background

At present, containers such as cups or buckets for containing hot beverages (such as hot coffee, hot tea, hot soybean milk, hot soup and the like) or hot foods are uncomfortable and even scalded because the high-temperature fluid contained in the containers is higher than the high-temperature state for a period of time, and the heat can be quickly transmitted to the holding surface through the cup body and the bucket body and then transmitted to the palm of a consumer.

Similarly, the outer high temperature of the container such as a cup or a barrel for containing cold drink food is conducted to the inner part through the wall of the cup or the wall of the barrel, and the cold drink in the container becomes hot, so that the taste of the cold drink food is reduced; in addition, the cold drink cup is held by hands for a long time, and the hands feel uncomfortable as cold.

Therefore, for containers for holding hot or cold beverages, corrugated paper cup sleeves are generally provided, and most commonly coffee cup sleeves are used for isolating the heat conduction between the surface of a high-temperature paper cup and the palm surface of a customer's hand so that the customer does not feel hot. However, the existing paper cup corrugated sleeve in the market adopts a structure of a hollow corrugated pipe, so that the heat preservation effect is limited.

Disclosure of Invention

In order to solve the technical problems, the utility model provides a heat-insulating paper container sleeve on one hand, wherein the paper container sleeve has a multi-layer composite structure and comprises an annular paper substrate and a first coating layer arranged on the inner side surface of the paper substrate; the first coating layer is a water-based foamable coating layer.

Preferably, a second coating layer is arranged on the outer side surface of the paper substrate; the second coating layer is a water-based foamable coating layer.

Preferably, the first coating layer is heated and foamed to form a foaming layer.

Preferably, the second coating layer is heated and foamed to form a foaming layer.

The utility model provides a heat-insulating paper container sleeve, wherein a first coating layer is arranged on the inner side surface of an annular paper substrate, and the first coating layer is a water-based foamable coating layer; the manufacturing process of the paper container sleeve is simple, industrial scale production is easy to realize, more importantly, the overall thickness and volume of the paper container sleeve can be very small, the paper container sleeve can be 1/5-1/3 of corrugated paper sleeves with the same application specification in the market, the boxing and transportation space can be saved, and the transportation cost of the paper container sleeve is greatly reduced; in a specific use scene, a certain amount of water is only needed to be applied to the first coating layer on the inner side surface of the paper container, so that the first coating layer is redissolved, then the paper container is foamed, dried and solidified at a foaming temperature to form a foaming layer, and the foamed paper container sleeve can be sleeved on the outer wall surface of a container with a corresponding size, can play a role in heat insulation and preservation, can be used as a heat insulation outer packaging sleeve and is widely applied to containers for hot drinks, cold drinks and cold drinks.

Drawings

FIG. 1 is a schematic cross-sectional view of a paper sleeve of example 1 of the present invention;

FIG. 2 is a schematic cross-sectional view of a foamed paper container sleeve of example 1 of the present invention;

FIG. 3 is a schematic cross-sectional view of a paper sleeve of example 2 of the present invention;

fig. 4 is a schematic cross-sectional view of a foamed paper sleeve of example 2 of the present invention.

Detailed Description

The present invention will be described in detail below with reference to specific embodiments shown in the drawings. These embodiments are not intended to limit the present invention, and structural, methodological, or functional changes made by those skilled in the art according to these embodiments are included in the scope of the present invention.

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted.

The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to provide a thorough understanding of embodiments of the utility model. One skilled in the relevant art will recognize, however, that the utility model may be practiced without one or more of the specific details, or with other methods, components, materials, and so forth. In some instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring the utility model.

Example 1

Referring to fig. 1, a schematic cross-sectional view of an insulated paper container sleeve of example 1 of the present invention.

As shown in fig. 1, the paper container sleeve 1 has a multi-layer composite structure including an annular paper substrate 10 and a first coating layer 20 disposed on an inner side of the paper substrate.

The first coating layer 20 adopts water-based foamable coating.

Regarding the manufacturing process of the insulated paper container sleeve of this example 1:

first, as for the material of the paper base 10, a grammage of about 40 to 300g/m can be selected²The cellulose paper of (2) may be, for example, white kraft paper or unbleached kraft paper.

Then, an aqueous foamable coating layer (first coating layer 20) was coated on the inner side surface of the paper substrate 10.

As for the coating range, except for a preset 'pasted portion' (a portion through which the sheet is bonded to form an annular container sleeve), the other portion is coated with an aqueous foamable coating material and heated and dried at a certain temperature to form a coating layer. The "certain temperature" herein means a drying temperature of the coating material; in the prior art, the coating is dried and cured by adopting a drying mode.

The aqueous foamable coating material may be an aqueous thermally expandable microsphere foamable material, for example, an aqueous thermally expandable microsphere foamable material formed by using thermally expandable microspheres as a foaming agent, an aqueous biomass material as a filler, or the like, and applied on a paper substrate, and dried at a drying temperature (and lower than the foaming temperature of the aqueous foamable coating material) to form a coating layer. And subsequently, the coating layer can further form a foaming layer, for example, the coating layer can be redissolved when meeting water, and then is foamed under the condition of foaming temperature of the water-based foamable coating and is dried, cured and molded into the foaming layer.

The thermal expansion microsphere foaming agent is an existing thermal expansion microsphere foaming agent.

The water-based biomass material used as the filler can be degradable water-based biomass materials such as starch and plant cellulose.

In one embodiment of the present invention, the first coating layer 20 has a dry coating weight of about 4 to 20g/m²The coating speed is 10-80 m/min, and the drying temperature is about 60-75 ℃.

Then, the paper container sleeve 1 is die-cut into single semi-finished products according to the shape and the size of the pre-designed paper container sleeve by a die-cutting machine. Generally, the size of the monolithic semi-finished product is matched with the target container, for example, the height of the monolithic semi-finished product is 0.8 times of the height of the target container, and the arc side length of the monolithic semi-finished product is 1.2 times of the full-width circumference of the corresponding position of the outer peripheral surface of the target container.

And finally, placing the obtained single semi-finished product on a linear box pasting machine, coating edge pasting glue on the edge pasting part, folding edges and adhering and forming the edges to obtain the heat-insulating paper container sleeve shown in the figure 1.

The manufacturing process of the paper container sleeve 1 of embodiment 1 of the application is simple, industrial scale production is easily realized, more importantly, the whole thickness and the whole volume of the paper container sleeve can be very small, the paper container sleeve can only be 1/5-1/3 of corrugated paper sleeves with the same application specifications on the market, the boxing transportation space can be saved, and the transportation cost of the paper container sleeve 1 is greatly reduced.

In a specific use scenario, the paper container sleeve 1 of embodiment 1 of the application is: before the paper container sleeve 1 of the embodiment 1 is sleeved on a container (for example, before a sleeve cup/a sleeve barrel), a certain amount of water is applied to the first coating layer 20 on the inner side surface of the paper container sleeve, so that the first coating layer 20 is redissolved, and then at a foaming temperature of 80-130 ℃, the first coating layer is foamed and dried and cured to form a foaming layer 20' (for example, the foaming layer 20 is placed in an oven or other heating devices with the temperature of 110 ℃ for 3 minutes for foaming and drying and curing molding), and a foamed paper container sleeve is obtained, and is shown in fig. 2. The foamed paper container sleeve can be sleeved on the outer wall surface of a container with a corresponding size, has the function of heat insulation, and can be widely applied to containers for hot drinks, hot foods, cold drinks and cold foods.

Example 2

Referring to fig. 3, a schematic cross-sectional view of an insulated paper container sleeve of example 2 of the present invention.

The insulated paper container sleeve of example 2 of the present invention differs from example 1 only in that: the outer side surface of the annular paper substrate 10 is also provided with a second coating layer 30.

The second dope layer 30 also adopts the water-based foamable paint, which has the same selection as the water-based foamable paint adopted in the first dope layer 20 in the above example 1, and detailed description thereof is omitted.

The manufacturing process of the heat-insulating paper container sleeve of embodiment 2 of the present invention is different from that of embodiment 1 only in that: a water-based foamable coating layer is applied to the outer surface of the paper substrate 10 (except for a predetermined paste portion). The other contents of the manufacturing process are the same as those of the manufacturing process of embodiment 1, and detailed description is omitted.

In a specific use scenario, the paper container sleeve 1 of embodiment 2 of the application is: before the paper container sleeve 1 of the embodiment 2 is sleeved on a container (for example, before a cup/barrel sleeve is sleeved), a certain amount of water is applied to the first paint layer 20 and the second paint layer 30 on the inner side and the outer side of the container to redissolve the two layers of the paint layers, and then the paint layers are foamed, dried and cured at a foaming temperature of 80-130 ℃ to form an inner foamed layer and an outer foamed layer (for example, the paint layers are placed into an oven at a temperature of 110 ℃ to be heated for 3 minutes to be foamed, dried and cured and molded), so that the foamed paper container sleeve is obtained, and the foamed paper container sleeve is shown in fig. 4.

The paper container sleeve after foaming in the embodiment 2 has a foaming layer inside and outside, has better heat insulation effect, and can be widely applied to containers for hot drinks, hot foods, cold drinks and cold foods.

It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art. The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.

Claims

1. A thermal-insulated paper container cover which characterized in that:

the paper container sleeve is of a multi-layer composite structure and comprises an annular paper substrate and a first coating layer arranged on the inner side surface of the paper substrate; the first coating layer is a water-based foamable coating layer.

2. The insulated paper container sleeve according to claim 1, wherein:

a second coating layer is arranged on the outer side surface of the paper substrate; the second coating layer is a water-based foamable coating layer.

3. The insulated paper container sleeve according to claim 1, wherein:

the first coating layer is heated and foamed to form a foaming layer.

4. The insulated paper container sleeve of claim 2, wherein:

the second coating layer is heated and foamed to form a foaming layer.