Heat preservation bag
By using Velcro in the insulated bag for double sealing and using a plastic film air column to isolate airflow, the problem that zipper seals cannot prevent airflow convection in existing technologies is solved, thus achieving a longer insulation effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HANGZHOU QIN CHENG PLASTIC PACKAGING MATERIAL CO LTD
- Filing Date
- 2025-06-24
- Publication Date
- 2026-05-12
AI Technical Summary
Existing insulated bags, sealed with zippers, cannot effectively prevent the convection of air between the inside and outside, resulting in poor insulation performance.
The double seal is achieved by using a first female hook and loop fastener, a first male hook and loop fastener, a second female hook and loop fastener, and a second male hook and loop fastener, and the airflow is prevented by the plastic film air column to form a structure that isolates gas exchange.
The double sealing of the insulated bag maximizes the insulation time, and the air column of the plastic film isolates the airflow, thus improving the insulation effect.
Smart Images
Figure CN224225674U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of packaging products, and in particular to an insulated bag. Background Technology
[0002] Insulated bags are a common type of food packaging (or delivery) item. The structure of commonly used insulated bags is shown in patent publication document CN303351840S. This type of insulated bag uses an insulating composite film material to make the bag body and lid. One end of the lid is sewn to the bag body and fixed together. The bag body and lid are sealed with a zipper. However, because there are gaps in the zipper, the zipper cannot actually prevent the convection of air inside and outside. Therefore, the insulation effect of the insulated bag shown in CN303351840S is actually very poor. Utility Model Content
[0003] To address the aforementioned problems, this invention proposes an insulated bag. By incorporating a first female hook and loop fastener, a first male hook and loop fastener, a second female hook and loop fastener, and a second male hook and loop fastener, a double seal is achieved on the insulated bag. Furthermore, by incorporating a plastic film air column, which prevents air convection, the bag's interior is kept warm, maximizing the insulation time.
[0004] The technical solution adopted by this utility model is as follows:
[0005] An insulated bag includes a composite film sheet, which is joined together to form a bag body and a lid. One end of the lid is fixed to the bag body. The bag body has an opening, and the lid is located at the opening. The bag also includes a plastic film air column, a first female hook and loop fastener, a first male hook and loop fastener, a second female hook and loop fastener, and a second male hook and loop fastener. The first female hook and loop fastener is disposed on the lid, the first male hook and loop fastener is disposed on the outer wall of the bag body, the second female hook and loop fastener and the second male hook and loop fastener are respectively disposed on the inner walls of the two sides of the bag body, and the plastic film air column is disposed on the inner wall of the bag body, and the plastic film air column is located between the first female hook and loop fastener and the second female hook and loop fastener.
[0006] In this type of insulated bag, a bag body and a lid are made using a composite film. One end of the lid is directly fixed to the bag opening of the bag body. The lid is located at the bag opening of the bag body and is used to seal the bag opening.
[0007] The method of using this type of insulated bag is as follows: First, place the item to be insulated inside the bag. Then, fasten the second female hook and loop fastener together, forming the bottom pocket cavity. The item to be insulated is located inside the bottom pocket cavity. Next, squeeze the bag wall above the bottom pocket cavity, causing the plastic film air column to adhere tightly to the inner walls on both sides. At this point, fasten the first female hook and loop fastener together, forming the upper pocket cavity. The upper pocket cavity contains the plastic film air column. The plastic film air column in the upper pocket cavity acts as an air barrier, effectively preventing convection of gases inside and outside the bag, thus keeping the temperature inside the bottom pocket cavity as low as possible, achieving long-lasting and effective insulation (or cold insulation) of the item. Furthermore, this type of insulated bag uses hook and loop fasteners for temporary sealing, so it can be reused.
[0008] In summary, this type of insulated bag achieves double sealing by setting a first female hook and loop fastener, a first male hook and loop fastener, a second female hook and loop fastener, and a second male hook and loop fastener. Furthermore, by setting up plastic film air columns, which can prevent air convection, the bag's interior is kept warm, maximizing the insulation time.
[0009] Optionally, the first female hook and loop fastener is of equal length to the first male hook and loop fastener, and the second female hook and loop fastener is of equal length to the second male hook and loop fastener.
[0010] Optionally, the length of the first female hook and loop fastener is equal to the length of the second female hook and loop fastener.
[0011] Optionally, the plastic film air column is bonded to one side of the inner wall of the bag.
[0012] Optionally, the composite film includes a pearl cotton layer, a first aluminum foil layer, a second aluminum foil layer, a first PE film layer, and a second PE film layer. The first PE film layer and the second PE film layer are respectively disposed on both sides of the pearl cotton layer, the first aluminum foil layer is disposed between the pearl cotton layer and the first PE film layer, and the second aluminum foil layer is disposed between the pearl cotton layer and the second PE film layer.
[0013] Optionally, a nonwoven fabric layer is also included, which is disposed on one side of the second PE film layer, and the second aluminum foil layer and the nonwoven fabric layer are respectively located on both sides of the second PE film layer.
[0014] When this type of composite film is made into a bag, the non-woven fabric layer is located on the outermost layer of the bag body, and the first PE film layer is located on the innermost side of the bag body.
[0015] Optionally, the first PE film layer and the second PE film layer have the same thickness, and the thickness of the first PE film layer is 30 micrometers to 70 micrometers.
[0016] Optionally, the first aluminum foil layer and the second aluminum foil layer have the same thickness, and the thickness of the first aluminum foil layer is 10 micrometers to 15 micrometers.
[0017] Optionally, the thickness of the pearl cotton layer is 0.1 cm to 0.2 cm.
[0018] Optionally, a drawstring is provided on the outer wall of the bag.
[0019] The purpose of the rope is to make it easier to carry.
[0020] The beneficial effects of this utility model are: by setting a first female hook and loop fastener, a first male hook and loop fastener, a second female hook and loop fastener, and a second male hook and loop fastener, a double seal is achieved for the insulated bag; and by setting a plastic film air column, the plastic film air column can prevent air convection, thereby achieving heat preservation inside the bag and maximizing the heat preservation time. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.
[0022] Figure 1 This is a simplified structural diagram of an insulated bag;
[0023] Figure 2 This is a simplified schematic diagram of the composite membrane structure.
[0024] The attached figures are labeled as follows: 11, lid; 12, bag body; 2, plastic film air column; 31, first female hook and loop fastener; 32, first male hook and loop fastener; 41, first female hook and loop fastener; 42, first male hook and loop fastener; 5, carrying strap; 101, non-woven fabric layer; 102, second PE film layer; 103, second aluminum foil layer; 104, pearl cotton layer; 105, first aluminum foil layer; 106, first PE film layer. Detailed Implementation
[0025] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.
[0026] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
[0027] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.
[0028] As attached Figure 1 and appendix Figure 2 As shown, an insulated bag includes a composite film, which is joined together to form a bag body 12 and a lid 11. One end of the lid 11 is fixed to the bag body 12. The bag body 12 has an opening, and the lid 11 is located at the opening. The bag also includes a plastic film air column 2, a first female hook and loop fastener 41, a first male hook and loop fastener 42, a second female hook and loop fastener, and a second male hook and loop fastener. The first female hook and loop fastener 41 is disposed on the lid 11, the first male hook and loop fastener 42 is disposed on the outer wall of the bag body 12, the second female hook and loop fastener and the second male hook and loop fastener are respectively disposed on the inner walls of the two sides of the bag body 12, and the plastic film air column 2 is disposed on the inner wall of the bag body 12, and the plastic film air column 2 is located between the first female hook and loop fastener 41 and the second female hook and loop fastener.
[0029] In this type of heat-insulating bag, a bag body 12 and a lid 11 are made using a composite film. One end of the lid 11 is directly fixed to the bag opening of the bag body 12. The lid 11 is located at the bag opening of the bag body 12 and is used to close the bag opening.
[0030] The method of using this type of insulated bag is as follows: First, place the item to be insulated inside the bag body 12. Then, attach the second female hook and loop fastener to the second male hook and loop fastener together, thus forming the bottom bag cavity. The item to be insulated is located inside the bottom bag cavity. Next, squeeze the bag wall above the bottom bag cavity of the bag body 12, causing the plastic film air columns 2 to adhere tightly to the inner walls on both sides. At this time, attach the first female hook and loop fastener 41 to the first male hook and loop fastener 42 together, thus forming the upper bag cavity. The upper bag cavity contains the plastic film air columns 2. The plastic film air columns 2 located inside the upper bag cavity act as an air gap, effectively preventing convection of gas inside and outside the bag body 12, thus keeping the temperature inside the bottom bag cavity as low as possible, thereby achieving long-lasting and effective insulation (or cold insulation) of the item. Furthermore, this type of insulated bag uses hook and loop fasteners for temporary sealing, so it can be reused.
[0031] In summary, this type of insulated bag achieves double sealing by setting the first female hook and loop fastener 41, the first male hook and loop fastener 42, the second female hook and loop fastener, and the second male hook and loop fastener. Furthermore, by setting the plastic film air column 2, the plastic film air column 2 can prevent air convection, thereby achieving heat preservation inside the bag body 12 and maximizing the heat preservation time.
[0032] As attached Figure 1 and appendix Figure 2 As shown, the lengths of the first female hook and loop fastener 41 and the first male hook and loop fastener 42 are equal, and the lengths of the second female hook and loop fastener and the second male hook and loop fastener are equal.
[0033] As attached Figure 1 and appendix Figure 2 As shown, the length of the first female hook and loop fastener 41 is equal to the length of the second female hook and loop fastener.
[0034] As attached Figure 1 and appendix Figure 2 As shown, the plastic film air column 2 is bonded to one side of the inner wall of the bag body 12.
[0035] As attached Figure 1 and appendix Figure 2 As shown, the composite film includes a pearl cotton layer 104, a first aluminum foil layer 105, a second aluminum foil layer 103, a first PE film layer 106, and a second PE film layer 102. The first PE film layer 106 and the second PE film layer 102 are respectively disposed on both sides of the pearl cotton layer 104. The first aluminum foil layer 105 is disposed between the pearl cotton layer 104 and the first PE film layer 106. The second aluminum foil layer 103 is disposed between the pearl cotton layer 104 and the second PE film layer 102.
[0036] As attached Figure 1 and appendix Figure 2 As shown, it also includes a nonwoven fabric layer 101, which is disposed on one side of the second PE film layer 102, and the second aluminum foil layer 103 and the nonwoven fabric layer 101 are respectively located on both sides of the second PE film layer 102.
[0037] When the non-woven fabric is used as the outermost layer, the non-woven fabric layer 101 is located on the outermost layer of the bag body 12 when the composite film is made into the bag body 12, and the first PE film layer 106 is located on the innermost side of the bag body 12.
[0038] As attached Figure 1 and appendix Figure 2 As shown, the first PE film layer 106 and the second PE film layer 102 have the same thickness, and the thickness of the first PE film layer 106 is 30 micrometers to 70 micrometers.
[0039] As attached Figure 1 and appendix Figure 2As shown, the first aluminum foil layer 105 and the second aluminum foil layer 103 have the same thickness, and the thickness of the first aluminum foil layer 105 is 10 micrometers to 15 micrometers.
[0040] As attached Figure 1 and appendix Figure 2 As shown, the thickness of the pearl cotton layer 104 is 0.1 cm to 0.2 cm.
[0041] As attached Figure 1 and appendix Figure 2 As shown, a rope is provided on the outer wall of the bag body 12.
[0042] The purpose of the rope is to make it easier to carry.
[0043] The above-described embodiments only illustrate some aspects of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. An insulated bag, comprising a composite film, the composite film being joined together to form a bag body and a lid, one end of the lid being fixed to the bag body, the bag body having an opening, and the lid being located at the opening, characterized in that, It also includes a plastic film air column, a first female hook and loop fastener, a first male hook and loop fastener, a second female hook and loop fastener, and a second male hook and loop fastener. The first female hook and loop fastener is disposed on the cover, the first male hook and loop fastener is disposed on the outer wall of the bag body, the second female hook and loop fastener and the second male hook and loop fastener are respectively disposed on the inner walls of the two sides of the bag body, and the plastic film air column is disposed on the inner wall of the bag body, and the plastic film air column is located between the first female hook and loop fastener and the second female hook and loop fastener.
2. The insulated bag according to claim 1, characterized in that, The first female hook and loop fastener is the same length as the first male hook and loop fastener, and the second female hook and loop fastener is the same length as the second male hook and loop fastener.
3. The insulated bag according to claim 1, characterized in that, The length of the first female hook and loop fastener is equal to the length of the second female hook and loop fastener.
4. The insulated bag according to claim 1, characterized in that, The plastic film air column is bonded to one side of the inner wall of the bag.
5. The insulated bag according to claim 1, characterized in that, The composite film includes a pearl cotton layer, a first aluminum foil layer, a second aluminum foil layer, a first PE film layer, and a second PE film layer. The first PE film layer and the second PE film layer are respectively disposed on both sides of the pearl cotton layer, the first aluminum foil layer is disposed between the pearl cotton layer and the first PE film layer, and the second aluminum foil layer is disposed between the pearl cotton layer and the second PE film layer.
6. The insulated bag according to claim 5, characterized in that, It also includes a nonwoven fabric layer, which is disposed on one side of the second PE film layer, and the second aluminum foil layer and the nonwoven fabric layer are respectively located on both sides of the second PE film layer.
7. The insulated bag according to claim 5, characterized in that, The first PE film layer and the second PE film layer have the same thickness, and the thickness of the first PE film layer is 30 micrometers to 70 micrometers.
8. The insulated bag according to claim 5, characterized in that, The first aluminum foil layer and the second aluminum foil layer have the same thickness, and the thickness of the first aluminum foil layer is 10 micrometers to 15 micrometers.
9. The insulated bag according to claim 5, characterized in that, The thickness of the pearl cotton layer is 0.1 cm to 0.2 cm.
10. The insulated bag according to claim 1, characterized in that, The outer wall of the bag is provided with a rope.