Heat insulation and preservation express bag

Abstract

A thermal insulation express bag comprises a bag body and a sealing structure. The bag body is formed by butt joint of heat preservation packaging materials and used for containing articles needing heat preservation. The heat preservation packaging material is sequentially provided with a protection layer, a heat insulation layer, a heat preservation layer and a sealing layer from outside to inside. The protection layer is located on the outermost side of the bag body and plays a role in protecting the heat insulation layer; the heat insulation layer is positioned on the inner side of the protection layer and adopts a metal foil film or metal particles with good heat reflection characteristics; the heat preservation layer is located on the inner side of the heat insulation layer, is made of a non-toxic and harmless foam material and has a barrier property on air heat convection; the sealing layer is positioned on the innermost layer of the bag body and is made of a polymer material with thermal fusion performance; a heat sealing edge is arranged on the edge of the heat preservation packaging material and surrounds the heat preservation layer. The heat sealing edge is arranged on the edge of the bag wall; and the sealing structure is used for sealing the bag body. The utility model relates to a healthy cold chain package. And articles sensitive to temperature are comprehensively protected in the transportation process.

Description

Technical Field

[0001] The utility model relates to the field of cold chain logistics express packaging, in particular to a heat-insulating and heat-preserving express bag. Background Art

[0002] With the development of the global economy and the improvement of people's living standards, the development of the logistics industry has become increasingly important. With the continuous upgrading of production and consumption modes, the coverage of the logistics industry is also getting wider and wider. When transporting some foods that need to be stored at a constant temperature or low temperature, cold chain logistics is required. In the cold chain logistics process, in order to ensure that foods are stored in a constant temperature or low temperature environment for a long time, logistics companies will use ordinary foam boxes or pearl cotton to wrap or contain the foods to be transported. At high temperatures, ordinary foam boxes and pearl cotton may produce benzene and other toxic gases, which are harmful to human health; they will also seriously pollute the environment after being discarded.

[0003] Especially when dealing with sensitive items such as foods and drugs that require specific temperature maintenance, the heat-insulating and heat-preserving performance has become a key indicator for measuring the performance of express bags. However, the existing packaging bags have some disadvantages. The common express packaging on the market at present is mostly a simple combination of cardboard boxes and ordinary foam boxes or ordinary pearl cotton, etc. These packaging materials have significant disadvantages in many aspects.

[0004] (1) The foam box is mainly made of polystyrene, which will release harmful substances at high temperatures, posing a potential hazard to human health. Its heat preservation effect is also relatively poor, and it is difficult to maintain the stability of the temperature inside the bag for a long time;

[0005] (2) Ordinary pearl cotton also has problems such as insufficient heat preservation performance, lack of waterproof performance, and poor durability;

[0006] (3) Even if vacuum packaging is used, it is disposable and has no reuse value;

[0007] (4) Nowadays, most packaging bags adopt a single-layer zipper design, which has the disadvantage of poor sealing. Content of the Utility Model

[0008] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art, and to provide a heat-insulating and heat-preserving express bag, which can solve the problems of vacuum safety packaging and reuse of express bags under cold chain, can improve the heat preservation performance and transportation safety, and is more environmentally friendly.

[0009] The present application provides a heat-insulating and heat-preserving express bag, including a bag body and a sealing structure;

[0010] The bag body is formed by butt-jointing heat-insulating packaging materials and is used for containing items that need heat preservation;

[0011] The heat-insulating packaging material is successively provided with a protective layer, a heat-insulating layer, a heat-preserving layer and a sealing layer from outside to inside;

[0012] The protective layer is located on the outermost side of the bag body and serves to protect the heat-insulating layer;

[0013] The heat-insulating layer is located inside the protective layer and is made of a metal foil film or metal particles with good heat reflection characteristics;

[0014] The heat-preserving layer is located inside the heat-insulating layer and is made of a non-toxic and harmless foam material, which has a barrier effect on air heat convection;

[0015] The sealing layer is located on the innermost layer of the bag body and is made of a polymer material with heat fusion performance;

[0016] A heat-sealed edge is provided at the edge of the heat-insulating packaging material, and the heat-sealed edge surrounds the heat-preserving layer;

[0017] The heat-sealed edge is provided at the edge of the bag wall;

[0018] The sealing structure is used to seal the bag body.

[0019] In one embodiment, the material used for the protective layer is polyester, polyethylene or polypropylene;

[0020] The material used for the heat-insulating layer is aluminum;

[0021] The material used for the heat-preserving layer is PU cotton;

[0022] The material used for the sealing layer is polyethylene or polypropylene.

[0023] In one embodiment, a protective layer is provided between the heat-insulating layer and the heat-preserving layer, and the material that can be used for the protective layer is polyester, polyethylene or polypropylene.

[0024] In one embodiment, the sealing structure is formed by heat-sealing the heat-sealed edges of two relatively arranged bag walls.

[0025] In one embodiment, a reusable sealing structure is provided on one side of the heat-insulating and heat-preserving express bag.

[0026] In one embodiment, the reusable sealing structure is a zipper, and the zipper is provided at the position of the heat-sealed edge on one side of the bag body;

[0027] The zipper includes a first side, a second side and a lock;

[0028] The first side and the second side are relatively arranged at the opening of the bag body;

[0029] The buckle is arranged at the end of the opening. The buckle is used to clamp the first side and the second side, so that the first side and the second side are locked with each other to form a sealed closure.

[0030] The first side and the second side of the zipper adopt a straight seal strip form or a double S-shaped seal strip form.

[0031] In one embodiment, the reusable sealing structure is a sealing strip, and the sealing strip includes a male strip and a female strip; the male strip and the female strip are oppositely arranged on the heat-sealing edge at the opening of the bag body, and the male strip and the female strip can be locked with each other to form a sealing structure at the opening of the bag body.

[0032] Both the male strip and the female strip penetrate through the heat-sealing edge.

[0033] The male strip includes a male sealing plate, a clamping strip, a plate buckle and a sealing convex. The male sealing plate is hermetically connected to the protective layer. The male sealing plate is connected with a clamping strip. One end of the male sealing plate is provided with a plate buckle for separating the male strip from the female strip. A sealing convex is arranged at the end of the clamping strip far away from the male sealing plate.

[0034] The female strip includes a female sealing plate, a clamping groove, an insertion hole and a sealing groove. The female sealing plate is hermetically connected to the protective layer. The male sealing plate is connected with a clamping groove. An insertion hole is arranged on the clamping groove. The insertion hole penetrates through the clamping groove and the female sealing plate. A sealing groove is arranged at the end of the clamping groove far away from the female sealing plate.

[0035] The sealing convex and the sealing groove form a locked sealing connection, so that a sealing structure is formed at the opening of the bag body.

[0036] In one embodiment, the reusable sealing structure is arranged inside the sealing layer, and an inner sealing member is arranged inside the sealing layer; a seal is formed at the inner side of one end of the bag body through the inner sealing member, and a second sealing structure is formed through the heat-sealing edge, further improving the sealing and heat preservation performance.

[0037] The inner sealing member includes a first inner strip, a second inner strip and a reusable sealing structure arranged on the first inner strip and the second inner strip.

[0038] The first strip and the second strip are respectively arranged on the sealing layers of two relatively arranged heat preservation packaging materials.

[0039] In one embodiment, the inner sealing member includes a first inner strip and a second inner strip.

[0040] A first connecting member is arranged on the first inner strip.

[0041] A second connecting member is arranged on the second inner strip.

[0042] A groove and a convex block are respectively and coupledly arranged on the first connecting member and the second connecting member.

[0043] The groove and the convex block are locked with each other to connect the first inner strip and the second inner strip to form a reusable sealing structure.

[0044] In one embodiment, the thickness of the heat insulation layer is 1 - 15 mm;

[0045] The docking method can adopt the way of closing three sides and opening one side, or the way of opening the upper and lower sides of the left and right edges;

[0046] The sealing layer completely covers the heat insulation layer or is only arranged at the edge part of the bag body.

[0047] Compared with the prior art, the beneficial effects of a heat insulation and heat preservation express bag provided by the present application are as follows.

[0048] 1. Make full use of the good heat reflection characteristics of the aluminum film, the barrier effect of the pores of the PU cotton on air heat convection and its high resilience;

[0049] 2. Add a special self-sealing device at the bag mouth to achieve a good airtight effect;

[0050] 3. The high-resilience PU has good reducibility after vacuum compression. After being evacuated, the space volume can be greatly reduced, which is convenient for transportation;

[0051] 4. It meets the safety requirements of food and medicine names and is a healthy cold chain living packaging; it fills the market gap of all-round protective packaging for temperature-sensitive items such as frozen foods and medicines during transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0053] Figure 1 Cross-section of the bag body material of the heat insulation and heat preservation express bag in one embodiment Figure 1 ;

[0054] Figure 2 Cross-section of the bag body material of the heat insulation and heat preservation express bag in one embodiment Figure 2 ;

[0055] Figure 3 Cross-section of the bag body material of the heat insulation and heat preservation express bag in one embodiment Figure 3 ;

[0056] Figure 4 Cross-section of the bag body material of the heat insulation and heat preservation express bag in one embodiment Figure 4 ;

[0057] Figure 5Schematic diagram of the bag body of a heat-insulating and heat-preserving express bag in an embodiment;

[0058] Figure 6 Schematic diagram of the open state of the zipper of a heat-insulating and heat-preserving express bag in an embodiment;

[0059] Figure 7 Schematic diagram of the closed state of the zipper of a heat-insulating and heat-preserving express bag in an embodiment;

[0060] Figure 8 Schematic diagram of the usage state of a heat-insulating and heat-preserving express bag in an embodiment;

[0061] Figure 9 Schematic diagram of another sealing structure of a heat-insulating and heat-preserving express bag in an embodiment;

[0062] Figure 10 Schematic diagram of the sealing strip structure of a heat-insulating and heat-preserving express bag in an embodiment;

[0063] Figure 11 Schematic diagram of the inner sealing structure of a heat-insulating and heat-preserving express bag in an embodiment;

[0064] Figure 12 Schematic diagram of the double S-shaped seal structure of a heat-insulating and heat-preserving express bag in an embodiment.

[0065] Reference numerals:

[0066] 1. Protective layer; 2. Heat-insulating layer; 3. Heat-preserving layer; 4. Sealing layer; 4-1. Inner seal; 4-11. First inner strip; 4-1

[0067] 2. Second inner strip; 4-13. First connecting member; 4-14. Second connecting member; 4-131. Groove; 4-141. Protrusion; 5. Protective layer;

[0068] 6. Zipper; 6-1. First side; 6-2. Second side; 6-3. Lock; 7. Sealing strip; 7-1. Male strip; 7-11. Male sealing plate; 7-12. Card strip; 7-13. Plate buckle; 7-14. Sealing protrusion; 7-2. Female strip; 7-21. Female sealing plate; 7-22. Card slot; 7-23. Insertion hole; 7-24. Sealing groove; 8. Heat-sealed edge. Detailed implementation manners

[0069] This part will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the drawings. The role of the drawings is to supplement the description in the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it should not be construed as a limitation on the protection scope of the present invention.

[0070] It should be noted that the terms "center", "longitudinal", "transverse", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical"

[0071] 、"horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present invention or simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention.

[0072] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined.

[0073] The special term "exemplary" herein means "serving as an example, embodiment or illustration". Any embodiment described as "exemplary" herein need not be construed as superior to or better than other embodiments.

[0074] Hereinafter, the application scenarios of the heat-insulating and heat-preserving express bag of the present application and the aspects contributing to the prior art will be described in detail with reference to the drawings and embodiments.

[0075] As Figures 1-5 shown, the bag body structure of the heat-insulating and heat-preserving express bag and the composite heat-preserving structure of the bag wall are shown.

[0076] A heat-insulating and heat-preserving express bag, comprising a bag body and a sealing structure;

[0077] The bag body is formed by docking heat-insulating packaging materials and is used for containing items that need to be heat-insulated.

[0078] The docking method can be to close three sides and leave one side open;

[0079] It can also be in the way of sealing the left and right sides and leaving the upper and lower sides open.

[0080] The heat-insulating packaging material is sequentially provided with a protective layer 1, a heat-insulating layer 2, a heat-preserving layer 3 and a sealing layer 4 from outside to inside;

[0081] The protective layer 1 is located on the outermost side of the bag body and serves to protect the heat-insulating layer 2;

[0082] The heat insulation layer 2 is located inside the protective layer 1 and is made of a metal foil film or metal particles with good heat reflection characteristics. The metal material has oxygen barrier, water barrier, and ultraviolet radiation protection properties, and can effectively block most of the external heat radiation;

[0083] The thermal insulation layer 3 is located inside the heat insulation layer 2 and is made of a non-toxic and harmless foam material, such as foam cotton. The cotton pores in it have a barrier effect on air heat convection and are used to maintain the temperature.

[0084] The sealing layer 4 is located on the innermost layer of the bag body and is made of a polymer material with heat fusion performance.

[0085] The sealing layer 4 can completely cover the heat insulation layer 2, as Figure 1 、 3 shown.

[0086] It can also be set only at the edge part of the bag body, for example, covering part of the thermal insulation layer 3, as Figure 2 、 4 shown.

[0087] A heat-sealed edge 8 is provided at the edge of the thermal insulation packaging material, and the heat-sealed edge 8 is arranged around the thermal insulation layer 3;

[0088] The heat-sealed edge 8 is provided at the edge of the bag wall;

[0089] The sealing structure is used to seal the bag body.

[0090] A feasible implementation method is to heat-seal the heat-sealed edges 8 of two opposite bag walls.

[0091] The material that can be used for the protective layer 1 is polyester, polyethylene, or polypropylene;

[0092] The material that can be used for the heat insulation layer 2 is aluminum;

[0093] The material that can be used for the thermal insulation layer 3 is PU cotton, and the thickness of the PU cotton material is 1 - 15 mm; PU cotton has good elasticity and can withstand large pressures without deformation, so as to be restored after vacuum compression. And because the PU cotton material is light in weight and has good cushioning performance, it can absorb a large amount of impact energy in a short time, effectively protecting the items from damage and being convenient to carry. In addition, this material also has good heat insulation and heat preservation performance, and can adapt to the problem of keeping the items in the bag fresh and warm during long-distance transportation.

[0094] The material that can be used for the sealing layer 4 is polyethylene or polypropylene that is harmless to the human body. For example, the polyethylene material has good waterproof, moisture-proof, and transparency properties, can protect the items in the bag from moisture and humid environment, and can form a firm seal during the heat-sealing process to ensure the integrity and tightness of the packaging.

[0095] In use, it is found that after vacuuming and then restoring, there is a situation where part of the heat insulation layer 2 is separated from the thermal insulation layer 3. A protective layer 5 can be provided between the heat insulation layer 2 and the thermal insulation layer 3. After the heat insulation and thermal insulation express bag is vacuumed and then restored, since the protective layer 5 and the protective layer 1 together play a role in fixing the heat insulation layer 2, the separation of the heat insulation layer 2 is avoided;

[0096] The materials that can be used for the protective layer 5 are polyester, polyethylene or polypropylene.

[0097] For the convenience of customers to subsequently take out the items that need to be kept warm, or the items that need to be kept warm may not be used up at one time and still need to be stored in a light-shielded and heat-insulated manner, a reusable sealing structure is specifically provided on one side of the heat insulation and thermal insulation express bag.

[0098] Such as Figures 6-8 shown, a reusable sealing structure shown is a zipper 6 structure.

[0099] The zipper 6 is arranged at the position of the heat-sealed edge 8 on one side of the bag body;

[0100] The zipper 6 includes a first side 6-1, a second side 6-2 and a lock 6-3;

[0101] The first side 6-1 and the second side 6-2 are oppositely arranged at the opening of the bag body;

[0102] The lock 6-3 is arranged at the end of the opening. Moving the lock 6-3 is used to clamp the first side 6-1 and the second side 6-2, so that the first side 6-1 and the second side 6-2 are locked with each other to form a sealed closure.

[0103] The first side 6-1 and the second side 6-2 of the zipper 6 can adopt the form of a straight seal of a self-sealing bag, or can also adopt the form of a double S-shaped seal.

[0104] Such as Figure 12 shown, a structure of a double S-shaped seal is shown.

[0105] For the double S-shaped seal, the seals arranged on the first side 6-1 and the second side 6-2 on both sides of the opening are all arranged in an S shape. The folding and locking of the S shape is more stable, and the formed fold can better increase the contact area and improve the sealing performance.

[0106] When in use, one end of the bag body with two open ends that has been formed can be sealed with the zipper 6 to form a bag body with three closed ends. The items that need heat insulation and thermal insulation are loaded into the bag body, and vacuum heat sealing is carried out through the other opening for sealing.

[0107] When transported to the user, open the zipper 6, and the express bag returns to a non-vacuum state, and the heat-insulating and heat-preserving items can be conveniently taken out. When not all of them can be used up at one time, the items can be put back into the express bag, and the zipper 6 can be closed for heat insulation and light protection storage.

[0108] As Figures 9-10 shown, another reusable sealing structure is shown as the sealing strip 7 structure.

[0109] The sealing strip 7 includes a male strip 7-1 and a female strip 7-2; the male strip 7-1 and the female strip 7-2 are oppositely arranged on the heat-sealing edge 8 at the opening of the bag body.

[0110] The male strip 7-1 and the female strip 7-2 can be locked with each other to form a sealing structure at the opening of the bag body.

[0111] Both the male strip 7-1 and the female strip 7-2 penetrate through the heat-sealing edge 8.

[0112] The male strip 7-1 includes a male sealing plate 7-11, a clamping strip 7-12, a plate buckle 7-13 and a sealing convex 7-14;

[0113] The male sealing plate 7-11 is hermetically connected to the protective layer 1, and the male sealing plate 7-11 is connected with a clamping strip 7-12;

[0114] One end of the male sealing plate 7-11 is provided with a plate buckle 7-13 for detaching the male strip 7-1 from the female strip 7-2;

[0115] A sealing convex 7-14 is provided at one end of the clamping strip 7-12 away from the male sealing plate 7-11;

[0116] The female strip 7-2 includes a female sealing plate 7-21, a clamping groove 7-22, a jack 7-23 and a sealing groove 7-24;

[0117] The female sealing plate 7-21 is hermetically connected to the protective layer 1, and the male sealing plate 7-11 is connected with a clamping groove 7-22;

[0118] A jack 7-23 is provided on the clamping groove 7-22, and the jack 7-23 penetrates through the clamping groove 7-22 and the female sealing plate 7-21;

[0119] A sealing groove 7-24 is provided at one end of the clamping groove 7-22 away from the female sealing plate 7-21;

[0120] During use, the clamping strip 7-12 penetrates into the jack 7-23, and the sealing convex 7-14 and the sealing groove 7-24 form a locked and sealed connection, so that a sealing structure is formed at the opening of the bag body.

[0121] Although Figure 9 only the sectional structure of the sealing strip 7 in one direction is shown, showing the sealing convex 7-14 and the sealing groove 7-24 in the long direction;

[0122] The sealing convex 7-14 and the sealing groove 7-24 are continuously annularly arranged on the clamping strip 7-12 and the clamping groove 7-22, which can ensure that the sealing strip 7 can form a sealed connection.

[0123] The reuse method of the sealing strip 7 is basically the same as that of the zipper 6, and will not be elaborated here.

[0124] To prevent the failure of the reusable sealing structure due to various reasons during transportation, the reusable sealing structure is arranged inside the sealing layer 4, and an inner seal 4-1 is arranged inside the sealing layer 4; a seal is formed at the inner side of one end of the bag body through the inner seal 4-1, and a second sealing structure can also be formed through the heat-sealed edge 8 to further improve the sealing and heat preservation performance.

[0125] The inner seal 4-1 includes a first inner strip 4-11, a second inner strip 4-12, and a reusable sealing structure arranged on the first inner strip 4-11 and the second inner strip 4-12.

[0126] The first strip and the second strip are respectively arranged on the sealing layers 4 of two relatively arranged heat preservation packaging materials.

[0127] The reusable sealing structure arranged on the first inner strip 4-11 and the second inner strip 4-12 can also adopt the design of the zipper 6 or the sealing strip 7.

[0128] As Figure 11 shown, a structure of the inner seal 4-1 is shown.

[0129] The inner seal 4-1 includes a first inner strip 4-11 and a second inner strip 4-12;

[0130] A first connecting piece 4-13 is arranged on the first inner strip 4-11;

[0131] A second connecting piece 4-14 is arranged on the second inner strip 4-12;

[0132] A groove 4-131 and a convex block 4-141 are respectively and coupledly arranged on the first connecting piece 4-13 and the second connecting piece 4-14;

[0133] The groove 4-131 and the convex block 4-141 can be locked with each other to connect the first inner strip 4-11 and the second inner strip 4-12 to form a reusable sealing structure.

[0134] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combinations of these technical features do not conflict, they should all be considered as the scope described in this specification.

[0135] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the patent scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A heat-insulating and heat-preserving express delivery bag, characterized in that, It includes a bag body and a sealing structure; The bag body is formed by butt - jointing heat - preservation packaging materials and is used for containing items that need heat preservation; The heat - preservation packaging materials are sequentially provided with a protective layer (1), a heat - insulation layer (2), a heat - preservation layer (3) and a sealing layer (4) from outside to inside; The protective layer (1) is located on the outermost side of the bag body and plays a role in protecting the heat - insulation layer (2); The heat - insulation layer (2) is located inside the protective layer (1) and is made of a metal foil film or metal particles with good heat - reflection characteristics; The heat - preservation layer (3) is located inside the heat - insulation layer (2) and is made of a non - toxic and harmless foam material, which has a barrier effect on air heat convection; The sealing layer (4) is located on the innermost layer of the bag body and is made of a polymer material with heat - fusion performance; A heat - sealed edge (8) is arranged at the edge of the heat - preservation packaging material, and the heat - sealed edge (8) surrounds the heat - preservation layer (3); The heat - sealed edge (8) is arranged at the edge of the bag wall; The sealing structure is used to seal the bag body.

2. The heat - insulation and heat - preservation express bag according to claim 1, wherein: The material used for the protective layer (1) is polyester, polyethylene or polypropylene; The material used for the heat - insulation layer (2) is aluminum; The material used for the heat - preservation layer (3) is PU cotton; The material used for the sealing layer (4) is polyethylene or polypropylene.

3. The heat - insulation and heat - preservation express bag according to claim 2, wherein: A protective layer (5) is arranged between the heat - insulation layer (2) and the heat - preservation layer (3), and the material that can be used for the protective layer (5) is polyester, polyethylene or polypropylene.

4. The heat - insulation and heat - preservation express bag according to claim 1, wherein, The sealing structure is formed by heat - sealing the heat - sealed edges (8) of two relatively - arranged bag walls.

5. The heat - insulation and heat - preservation express bag according to any one of claims 1 - 4, wherein, A reusable sealing structure is arranged on one side of the heat - insulation and heat - preservation express bag.

6. The heat - insulation and heat - preservation express bag according to claim 5, wherein: The reusable sealing structure is a zipper (6), and the zipper (6) is arranged at the position of the heat - sealed edge (8) on one side of the bag body; The zipper (6) includes a first side (6 - 1), a second side (6 - 2) and a lock (6 - 3); The first side (6 - 1) and the second side (6 - 2) are relatively arranged at the opening of the bag body; The lock (6 - 3) is arranged at the end of the opening, and the lock (6 - 3) is used to clamp the first side (6 - 1) and the second side (6 - 2) so that the first side (6 - 1) and the second side (6 - 2) are locked with each other to form a sealed opening; The first side (6 - 1) and the second side (6 - 2) of the zipper (6) are in the form of a straight seal or a double - S - shaped seal.

7. The heat - insulation and heat - preservation express bag according to claim 5, wherein: The reusable sealing structure is a sealing strip (7), and the sealing strip (7) includes a male strip (7 - 1) and a female strip (7 - 2); the male strip (7 - 1) and the female strip (7 - 2) are relatively arranged on the heat - sealed edge (8) at the opening of the bag body, and the male strip (7 - 1) and the female strip (7 - 2) can be locked with each other to form a sealing structure for the opening of the bag body; The male strip (7-1) and the female strip (7-2) both penetrate through the heat-sealed edge (8). The male strip (7-1) includes a male sealing plate (7-11), a clamping strip (7-12), a plate buckle (7-13) and a sealing convex (7-14). The male sealing plate (7-11) is hermetically connected to the protective layer (1). The male sealing plate (7-11) is connected with the clamping strip (7-12). One end of the male sealing plate (7-11) is provided with a plate buckle (7-13) for detaching the male strip (7-1) from the female strip (7-2). A sealing convex (7-14) is provided at the end of the clamping strip (7-12) away from the male sealing plate (7-11). The female strip (7-2) includes a female sealing plate (7-21), a clamping groove (7-22), an insertion hole (7-23) and a sealing groove (7-24). The female sealing plate (7-21) is hermetically connected to the protective layer (1). The male sealing plate (7-11) is connected with the clamping groove (7-22). The insertion hole (7-23) is provided on the clamping groove (7-22). The insertion hole (7-23) penetrates through the clamping groove (7-22) and the female sealing plate (7-21). A sealing groove (7-24) is provided at the end of the clamping groove (7-22) away from the female sealing plate (7-21). The sealing convex (7-14) and the sealing groove (7-24) form a locked and sealed connection, so that the opening of the bag body forms a sealing structure.

8. The heat-insulating and heat-preserving express delivery bag according to claim 5, wherein The reusable sealing structure is arranged inside the sealing layer (4), and an inner sealing member (4-1) is arranged inside the sealing layer (4); a seal is formed inside one end of the bag body through the inner sealing member (4-1), and a second sealing structure is formed through the heat-sealed edge (8) to further improve the sealing and heat-preserving performance. The inner sealing member (4-1) includes a first inner strip (4-11), a second inner strip (4-12) and a reusable sealing structure arranged on the first inner strip (4-11) and the second inner strip (4-12). The first inner strip (4-11) and the second inner strip (4-12) are respectively arranged on the sealing layers (4) of two relatively arranged heat-insulating packaging materials.

9. The heat-insulating and heat-preserving express delivery bag according to claim 8, wherein The inner sealing member (4-1) includes a first inner strip (4-11) and a second inner strip (4-12). A first connecting member (4-13) is arranged on the first inner strip (4-11). A second connecting member (4-14) is arranged on the second inner strip (4-12). A groove (4-131) and a convex block (4-141) are respectively and coupledly arranged on the first connecting member (4-13) and the second connecting member (4-14). The groove (4-131) and the convex block (4-141) are locked with each other to connect the first inner strip (4-11) and the second inner strip (4-12) to form a reusable sealing structure.

10. The heat-insulating and heat-preserving express delivery bag according to claim 1, wherein The thickness of the heat-insulating layer is 1-15 mm. The docking method can adopt the method of closing three sides and opening one side, or the method of opening the upper and lower sides on the left and right sides of the sealed edge. The sealing layer (4) completely covers the heat-insulating layer (2) or is only arranged at the edge part of the bag body.

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