Heat-preservation damp-proof kraft paper bag

Abstract

The utility model relates to a heat preservation moistureproof kraft paper bag, relates to kraft paper technical field, including paper bag body, support subassembly and sealing subassembly, the paper bag body includes sealing portion and storage portion, the storage portion is provided with the storage cavity, the support subassembly includes bottom plate, paperboard, a plurality of absorbent strip and fixed layer, and the sealing subassembly includes the bottom plate, paperboard, a plurality of absorbent strip and fixed layer. The bottom plate is placed at the bottom of the storage cavity, the paperboard is composed of a plurality of first inclined plates and second inclined plates, one ends of the first inclined plates and the second inclined plates are arranged on the bottom plate, the other ends of the first inclined plates and the second inclined plates are inclined in the direction close to each other and connected with each other, the paperboard is in a sawtooth shape, and a plurality of water absorption strips are arranged on the side, away from the bottom plate, of the paperboard. And the water absorption strip is fixedly arranged on the paperboard through the fixing layer. According to the kraft paper bag, through the supporting assembly, when food is loaded in the kraft paper bag, the bottom stress is more uniform, the kraft paper bag is not prone to making contact with water vapor, and the degumming and cracking phenomena are not prone to occurring.

Description

Technical Field

[0001] This utility model relates to the field of kraft paper technology, and in particular to a heat-insulating and moisture-proof kraft paper bag. Background Technology

[0002] Kraft paper, used as a packaging material, is very strong and usually yellowish-brown. A flame-retardant resin layer is often added to kraft paper for heat insulation and flame retardancy. Although existing flame-retardant kraft paper is constantly being innovated and developed, basically meeting people's needs, there is still room for improvement. Kraft paper bags are bags made of kraft paper. Kraft paper bags are non-toxic, odorless, and pollution-free, meeting national environmental protection standards. They are high-strength and environmentally friendly, making them one of the most popular environmentally friendly packaging materials internationally. Kraft paper bags are increasingly widely used; they are commonly available in supermarkets, shopping malls, shoe stores, clothing stores, and other places, making it convenient for customers to carry their purchases. Kraft paper bags are an environmentally friendly packaging material, and there are many types available.

[0003] Currently, a Chinese utility model patent application with a publication date of June 3, 2022, and publication number CN216660957U, proposes an environmentally friendly paper bag, including a main body. The main body includes a left side panel, a right side panel, a front side panel, a rear side panel, and a bottom panel. The front and rear side panels are provided with handles. A sealing sticker is provided at the opening at the top of the main body on the front side panel. The sealing sticker includes a fixing part and an adhesive part. The fixing part is fixed to the front side panel. The adhesive part is provided with several easy-tear lines, which divide the adhesive part into multiple segments. The inner side of each segment of the adhesive part is provided with adhesive, and the surface of the adhesive is provided with release paper. This utility model can seal the opening of the paper bag, making it convenient to carry and providing high privacy. It also allows for repeated sealing and unsealing for multiple uses.

[0004] However, existing kraft paper bags lack a support structure, making them prone to deformation. Furthermore, most of these bags employ an adhesive bottom design, where the bottom is a series of folded sections glued together. When loading items, the uneven stress on the bottom, due to variations in the size and shape of the food, can easily lead to delamination and cracking. Additionally, placing hot food in traditional kraft paper bags generates moisture, which condenses on the inner walls of the bag. As the moisture accumulates, it condenses and drips to the bottom, further exacerbating the frequency of delamination and cracking. Summary of the Invention

[0005] This utility model provides a heat-insulating and moisture-proof kraft paper bag, which can improve the technical problem in related technologies where the bottom of the kraft paper bag is prone to delamination and cracking due to uneven stress or contact with moisture when loading food.

[0006] This application provides an embodiment of an insulated and moisture-proof kraft paper bag, comprising:

[0007] The paper bag body, support assembly, and sealing assembly are provided. The paper bag body includes a sealing part and a storage part. The storage part is provided with a storage cavity. The support assembly includes a base plate, cardboard, multiple absorbent strips, and a fixing layer. The base plate is placed at the bottom of the storage cavity. The cardboard is composed of multiple first inclined plates and second inclined plates. One end of each of the first and second inclined plates is placed on the base plate, and the other end is inclined and connected to each other in a direction that brings them closer together. The cardboard is serrated. Multiple absorbent strips are provided on the side of the cardboard away from the base plate. The absorbent strips are fixed on the cardboard by the fixing layer.

[0008] The technical solutions described above in this application embodiment have at least the following technical effects: When food is placed in and stored in a kraft paper bag, the food is placed on the cardboard. Due to the inclined arrangement of the first and second inclined plates, the contact area between the food and the cardboard is small, and each part of the cardboard is compressed, thereby generating a uniform force. This force makes the paper fibers more compact. At the same time, the inclined first and second inclined plates reduce the width of the cardboard and increase its thickness. This change improves the mechanical properties of the paper because it can better disperse and bear external pressure. The cardboard, through the bottom plate, makes the bottom of the storage cavity more evenly stressed. When water vapor is generated inside the kraft paper bag, the water vapor flows through the fixed laminar flow to the absorbent strip. The absorbent strip absorbs the water vapor, reducing the water vapor on the inner layer of the kraft paper, making it less likely for the water vapor to condense. This makes the items less likely to get wet, and the bottom of the kraft paper bag is also less likely to be soaked by condensed water vapor and cause delamination and cracking.

[0009] The heat-insulating and moisture-proof kraft paper bag provided in this application embodiment uses serrated cardboard to enable the support components to better distribute and bear external pressure, thereby making the force on the bottom of the storage cavity more uniform. This makes the bottom of the kraft paper bag less prone to delamination and cracking due to uneven force distribution. Furthermore, the water-absorbing strip absorbs the moisture generated inside the kraft paper bag, making the bottom of the kraft paper bag less prone to delamination and cracking due to condensed moisture.

[0010] In some embodiments, a support cavity is formed between the first inclined plate, the second inclined plate, and the bottom plate, and baffles are provided at the openings on both sides of the support cavity to seal the support cavity.

[0011] In some embodiments, the absorbent strip is disposed in a recess on the side wall of the cardboard.

[0012] In some embodiments, the inner and outer sides of the paper bag body are provided with a waterproof layer.

[0013] In some embodiments, the sealing portion includes a first sealing edge and a second sealing edge, and the sealing assembly includes a sealing strip, a first connecting plate, a first sealing plate, a second sealing plate, and a second connecting plate. The sealing strip is disposed on the first sealing edge via the first connecting plate, and the first sealing plate and the second sealing plate are both disposed on the second sealing edge via the second connecting plate. A sealing cavity for sealing with the sealing strip is formed between the first sealing plate, the second sealing plate, and the second connecting plate.

[0014] In some embodiments, both the first sealing edge and the second sealing edge are provided with handle holes. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A three-dimensional structural diagram of a heat-insulating and moisture-proof kraft paper bag provided in an embodiment of this application;

[0017] Figure 2 For along Figure 1 Cross-sectional view of line AA in the middle;

[0018] Figure 3 for Figure 2 Enlarged view of section B in the middle;

[0019] Figure 4 for Figure 2 Enlarged view of section C;

[0020] Figure 5 A three-dimensional structural diagram of the support component provided in an embodiment of this application;

[0021] Figure 6 for Figure 5 Enlarged view of section D in the middle.

[0022] The following are the labeling elements in the figure:

[0023] 10. Paper bag body; 11. Storage section; 111. Storage cavity; 12. Sealing section; 121. First sealing edge; 122. Second sealing edge; 123. Handle hole; 13. Waterproof layer; 20. Support assembly; 21. Base plate; 22. Cardboard; 221. First inclined plate; 222. Second inclined plate; 23. Absorbent strip; 24. Fixing layer; 25. Storage cavity; 26. Baffle; 30. Sealing assembly; 31. Sealing strip; 32. First connecting plate; 33. First sealing plate; 34. Second sealing plate; 35. Second connecting plate; 36. Sealing cavity. Detailed Implementation

[0024] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application. The terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0026] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0027] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0029] In this application, "and / or" is merely a way of describing the relationship between related objects, indicating that three relationships can exist; for example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0030] It should be noted that in this application, the words "in some embodiments," "exemplarily," and "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "in some embodiments," "exemplarily," or "for example" should not be construed as being more preferred or advantageous than other embodiments or design solutions. Specifically, the use of words such as "in some embodiments," "exemplarily," and "for example" is intended to present related concepts in a specific manner, meaning that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of this application. The appearance of the above words in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0031] Kraft paper, used as a packaging material, is very strong and usually yellowish-brown. A flame-retardant resin layer is often added to kraft paper for heat insulation and flame retardancy. Although existing flame-retardant kraft paper is constantly being innovated and developed, it basically meets people's needs. Kraft paper bags are bags made of kraft paper. Kraft paper bags are non-toxic, odorless, and pollution-free, meeting national environmental protection standards. They are high-strength and environmentally friendly, making them one of the most popular environmentally friendly packaging materials internationally. Kraft paper bags are increasingly widely used; they are generally available in supermarkets, shopping malls, shoe stores, clothing stores, and other places for customers to conveniently carry their purchases.

[0032] However, most existing paper bags use an adhesive bottom design, where the bottom is folded and glued together. When loading items, the bottom is prone to uneven stress due to the different sizes and shapes of the food, making it easy for the adhesive to come unglued and crack. When placing freshly baked dough-based foods, such as steamed buns, dumplings, fried dough sticks, French fries, and pancakes, the food itself is hot. When hot food is placed in a traditional kraft paper bag, moisture will be generated. The moisture condenses on the inner wall of the bag. As the moisture increases, it will condense and drip to the bottom of the kraft paper bag, further increasing the frequency of adhesive ungluing and cracking at the bottom.

[0033] Based on this, in order to improve the problem that the bottom of kraft paper bags is prone to delamination and cracking when loading items due to uneven stress or contact with moisture in the related technology, the embodiments of this application provide the following solution.

[0034] This application provides a heat-insulating and moisture-proof kraft paper bag, including a paper bag body 10, a support component 20, and a sealing component 30. The paper bag body 10 includes a sealing part 12 and a storage part 11. The storage part 11 is provided with a storage cavity 111. The support component 20 includes a bottom plate 21, a cardboard 22, a plurality of absorbent strips 23, and a fixing layer 24. The bottom plate 21 is placed at the bottom of the storage cavity 111. The cardboard 22 is composed of a plurality of first inclined plates 221 and second inclined plates 222. One end of each of the first inclined plate 221 and the second inclined plate 222 is disposed on the bottom plate 21, and the other end is inclined and connected to each other in a direction that approaches each other. The cardboard 22 is serrated. A plurality of absorbent strips 23 are provided on the side of the cardboard 22 away from the bottom plate 21. The absorbent strips 23 are fixedly disposed on the cardboard 22 by the fixing layer 24.

[0035] As can be seen from the above, the heat-insulating and moisture-proof kraft paper bag provided in this application embodiment allows for the storage of food placed inside the kraft paper bag. The food is placed on the cardboard 22. Due to the inclined arrangement of the first inclined plate 221 and the second inclined plate 222, the contact area between the food and the cardboard 22 is small, and each part of the cardboard 22 is compressed, thereby generating a uniform force. This force makes the paper fibers more compact. Simultaneously, the inclined first inclined plate 221 and the second inclined plate 222 reduce the width of the cardboard 22 and increase its thickness, thus improving the mechanical properties of the paper. Because it can better disperse and bear external pressure, the cardboard 22, through the bottom plate 21, makes the bottom of the storage cavity 111 more evenly stressed; when water vapor is generated inside the kraft paper bag, the water vapor flows through the fixing layer 24 to the absorbent strip 23, which absorbs the water vapor, reducing the water vapor on the inner layer of the kraft paper and making it less likely for the water vapor to condense; while making the items less likely to get wet, the bottom of the kraft paper bag is also less likely to be soaked by condensed water vapor and cause delamination and cracking; the support component 20 is placed inside the storage cavity 111, and when the support component 20 is damaged, the user can directly take out the support component 20 for replacement, which is simple and convenient to operate.

[0036] In some embodiments, please refer to the following: Figures 3 to 6 The first inclined plate 221, the second inclined plate 222 and the bottom plate 21 form a support cavity 25. Baffles 26 are provided at the openings on both sides of the support cavity 25 to seal the support cavity 25.

[0037] With this configuration, when each part of the cardboard 22 is compressed, the gas inside the sealed support cavity 25 is also compressed. Compressed gas tends to expand, increasing the pressure within the support cavity 25. This reduces some of the compressive force, resulting in a more even distribution of force at the bottom of the storage cavity 111. This further reduces the probability of the bottom of the kraft paper bag cracking due to uneven force distribution. Therefore, the support cavity 25 and baffle 26 further increase the load-bearing capacity of the support assembly 20, making the cardboard 22 less prone to deformation. This further reduces the probability of the bottom of the kraft paper bag cracking due to uneven force distribution.

[0038] Optionally, please refer to Figures 1 to 2 Both the first sealing edge 121 and the second sealing edge 122 are provided with handle holes 123.

[0039] With this design, when the paper bag body 10 needs to be carried, the user can pick up the paper bag body 10 through the handle hole 123 for carrying. The operation is simple and convenient. In addition, a plastic ring can be set at the handle hole 123 to reduce the probability of the paper tearing at the handle hole 123 when the user picks up the paper bag body 10 through the handle hole 123, thereby increasing the service life of the paper bag.

[0040] Optionally, please refer to Figures 3 to 6 The absorbent strip 23 is disposed in the recess of the side wall of the cardboard 22.

[0041] With this configuration, when food is placed and stored inside the kraft paper bag, the absorbent strip 23 is located in the recessed area of ​​the side wall of the cardboard 22. The food will contact the connection between the first inclined plate 221 and the second inclined plate 222, which further reduces the contact area between the food and the cardboard 22, reducing its stress area. Each part is compressed, thus generating a uniform force. This force makes the paper fibers more compact. The cardboard 22, through the bottom plate 21, makes the bottom of the storage cavity 111 more evenly stressed, thereby reducing the probability that the bottom of the kraft paper bag will not easily delaminate or crack due to uneven stress. When there is too much moisture inside the paper bag body 10, the condensed moisture will flow into the recessed area of ​​the cardboard 22 under the action of gravity, making it convenient for the absorbent strip 23 to absorb water. The connection between the food and the first inclined plate 221 and the second inclined plate 222 is less likely to block the absorbent strip 23, making it convenient for the absorbent strip 23 to absorb moisture.

[0042] Optionally, please refer to Figure 3 The paper bag body 10 has a waterproof layer 13 on both its inner and outer sides.

[0043] With this design, when water vapor is generated inside the storage cavity 111 or the external humidity is high, the paper bag body 10 is not easily exposed to water under the protection of the waterproof layer 13 set on both the inner and outer sides of the paper bag body 10. Since the paper fiber network will expand after the paper comes into contact with water, its strength will decrease. Therefore, the waterproof layer 13 increases the durability of the paper bag body 10.

[0044] Optionally, please refer to Figure 4 The sealing portion 12 includes a first sealing edge 121 and a second sealing edge 122. The sealing assembly 30 includes a sealing strip 31, a first connecting plate 32, a first sealing plate 33, a second sealing plate 34, and a second connecting plate 35. The sealing strip 31 is disposed on the first sealing edge 121 through the first connecting plate 32. The first sealing plate 33 and the second sealing plate 34 are both disposed on the second sealing edge 122 through the second connecting plate 35. A sealing cavity 36 is formed between the first sealing plate 33, the second sealing plate 34, and the second connecting plate 35 for sealing with the sealing strip 31.

[0045] With this configuration, when sealing the paper bag body 10, the sealing strip 31 is placed on the first sealing plate 33 and the second sealing plate 34, and the sealing strip 31 is pressed towards the first sealing plate 33 and the second sealing plate 34, so that the sealing strip 31 is squeezed into the sealing cavity 36. The first sealing plate 33 and the second sealing plate 34 clamp the sealing strip 31 under their own elasticity, thereby forming a seal at the opening of the storage cavity 111. When the user needs to open the paper bag, the first sealing edge 121 and the second sealing edge 122 are moved away from each other in a direction away from each other. The ends of the first sealing plate 33 and the second sealing plate 34 away from the second connecting plate 35 are moved away from each other in a direction away from each other under their own elasticity, so that the sealing strip 31 is disengaged from the sealing cavity 36, and the paper bag can be opened. Therefore, the configuration of the sealing strip 31, the first sealing plate 33 and the second sealing plate 34 makes it convenient for the user to seal the storage cavity 111, and the operation is simple and convenient.

[0046] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A heat-insulating and moisture-proof kraft paper bag, comprising a paper bag body (10), a support component (20), and a sealing component (30), characterized in that: The paper bag body (10) includes a sealing part (12) and a storage part (11), and the storage part (11) is provided with a storage cavity (111). The support assembly (20) includes a base plate (21), a cardboard (22), multiple absorbent strips (23), and a fixing layer (24). The base plate (21) is placed at the bottom of the storage cavity (111). The cardboard (22) is composed of multiple first inclined plates (221) and second inclined plates (222). One end of each of the first inclined plate (221) and the second inclined plate (222) is set on the base plate (21), and the other end is inclined and connected to each other in a direction that brings them closer together. The cardboard (22) is serrated. Multiple absorbent strips (23) are provided on the side of the cardboard (22) away from the base plate (21). The absorbent strips (23) are fixed on the cardboard (22) by the fixing layer (24).

2. The heat-insulating and moisture-proof kraft paper bag according to claim 1, characterized in that: The first inclined plate (221), the second inclined plate (222) and the bottom plate (21) form a support cavity (25). Baffles (26) are provided at the openings on both sides of the support cavity (25) to seal the support cavity (25).

3. The heat-insulating and moisture-proof kraft paper bag according to claim 2, characterized in that: The absorbent strip (23) is placed in the recessed part of the side wall of the cardboard (22).

4. The heat-insulating and moisture-proof kraft paper bag according to claim 3, characterized in that: The paper bag body (10) is provided with waterproof layers (13) on both the inner and outer sides.

5. A heat-insulating and moisture-proof kraft paper bag according to any one of claims 1-4, characterized in that: The sealing part (12) includes a first sealing edge (121) and a second sealing edge (122). The sealing assembly (30) includes a sealing strip (31), a first connecting plate (32), a first sealing plate (33), a second sealing plate (34), and a second connecting plate (35). The sealing strip (31) is disposed on the first sealing edge (121) through the first connecting plate (32). The first sealing plate (33) and the second sealing plate (34) are both disposed on the second sealing edge (122) through the second connecting plate (35). A sealing cavity (36) for sealing with the sealing strip (31) is formed between the first sealing plate (33), the second sealing plate (34), and the second connecting plate (35).

6. The heat-insulating and moisture-proof kraft paper bag according to claim 5, characterized in that: Both the first sealing edge (121) and the second sealing edge (122) are provided with handle holes (123).

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