A sealed sous-vide food bag
By designing the bag body, sealing ribs, main ear straps, secondary ear straps, buckles, and buttonholes, the food bag solves the problems of poor sealing and difficulty in recycling. The use of TPO material simplifies processing and improves sealing performance, making it suitable for low-temperature cooking and portability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TONGDA SMART TECH (XIAMEN) CO LTD
- Filing Date
- 2025-06-23
- Publication Date
- 2026-07-03
Smart Images

Figure CN224448712U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of food bag technology, specifically to a sealed low-temperature retort food bag. Background Technology
[0002] As consumers demand more from food preservation, portability, and environmental friendliness, the limitations of traditional food storage bags (such as PE, PVC, and silicone) in terms of functionality, safety, and environmental protection are becoming increasingly apparent. For example, PE and PVC bags are prone to grease seepage, silicone food bags are not environmentally friendly and silicone is extremely difficult to recycle. Furthermore, these materials are very complex to design for achieving a sealed, low-temperature boiling function, and their poor sealing performance makes them prone to problems such as external moisture seeping in during boiling, affecting the quality of the food inside.
[0003] Therefore, existing food bag technology needs further design. Utility Model Content
[0004] The purpose of this invention is to overcome the shortcomings of existing food bag technology, such as poor sealing performance, complex design, difficulty in material recycling, and the inability to be integrally molded, requiring multiple manufacturing processes. By rationally designing the food bag technology and using a bag body, sealing ribs, main ear straps, secondary ear straps, buckles, and fastening holes, it can achieve the effects of easy recycling, simple and practical design, improved sealing performance, simplified processing and manufacturing, and increased convenience.
[0005] The specific technical solution of this utility model is as follows:
[0006] A sealed low-temperature retort food bag includes: a bag body, a sealing rib, a main ear strap, a secondary ear strap, a buckle, and a fastening hole. The top of the bag body has an opening, and the sealing rib is provided at the opening and on the inner side of the top of the bag body. The sealing rib is used to open or close the opening of the bag body. The main ear strap is provided on one side of the top of the bag body, and the secondary ear strap is provided on the other side of the top of the bag body. The buckle is provided on the main ear strap, and the fastening hole is provided on the secondary ear strap. The buckle and the fastening hole are interlocked. The bag body, the sealing rib, the main ear strap, and the secondary ear strap are integrally formed.
[0007] Furthermore, at least two sealing strip ribs are selected.
[0008] Furthermore, at least two buckles are selected.
[0009] Furthermore, the same number of buckles and buckle holes are selected.
[0010] Furthermore, the bag body, sealing ribs, main ear strap, secondary ear strap, buckle, and buckle hole are all integrally formed.
[0011] Furthermore, the bag body, sealing strap, main ear strap, secondary ear strap, buckle, and buckle hole are all made of thermoplastic polyolefin (TPO) material.
[0012] Furthermore, the thermoplastic polyolefin (TPO) material is selected from food-grade thermoplastic polyolefin (TPO) material.
[0013] Furthermore, the bag body is selected as an elliptical cylinder.
[0014] Furthermore, the major axis of the bottom ellipse of the bag body is smaller than the major axis of the top ellipse of the bag body, and the minor axis of the bottom ellipse of the bag body is larger than the minor axis of the top ellipse of the bag body. The bottom ellipse and the top ellipse of the bag body are smoothly connected, that is, the side is a smooth transition surface.
[0015] Furthermore, the inclination angle α of one side of the bag body ranges from 5° to 10°; the inclination angle β of the other side of the bag body ranges from 5° to 10°.
[0016] Furthermore, the tilt angle α and the tilt angle β are equal.
[0017] Furthermore, the bag wall gradually thins from the bottom to the top, meaning it is thinnest at the bottom and thinnest at the top.
[0018] Furthermore, the thickness of the bag wall is between 0.4 mm and 1.2 mm.
[0019] Beneficial effects
[0020] This invention rationally designs food bag technology, employing a bag body, sealing ribs, main ear straps, secondary ear straps, buckles, and fastening holes. This results in easy recycling, a simple and practical design, improved sealing performance, simplified processing, and enhanced convenience. The invention uses newly developed TPO material and features an internal small-protrusion sealing rib design. Folding, rolling, and fastening achieve a low-temperature cooking and sealing effect up to 70℃. Liquid foods sealed at room temperature can be easily carried in a bag. In a sealed state, it can be carried without leakage and can withstand 5kg of pressure without leakage. The structural design achieves a seal at 70℃ water temperature and 5kg pressure. The handle can be formed by the main and secondary ear straps fastening together to resemble a carrying strap for easy carrying. Attached Figure Description
[0021] Figure 1 This is a structural schematic diagram of a sealed low-temperature cooking food bag according to the present invention.
[0022] Figure 2 This is a structural schematic diagram from another perspective of the sealed low-temperature cooking food bag of this utility model.
[0023] Figure 3 This is a front view structural diagram of a sealed low-temperature cooking food bag according to the present invention.
[0024] Figure 4 This is a schematic diagram of the folding and rolling structure of a sealed low-temperature cooking food bag according to the present invention.
[0025] The reference numerals are as follows: 01. Bag body; 02. Secondary ear loop; 03. Button hole; 04. Sealing strap; 05. Buckle; 06. Main ear loop. Detailed Implementation
[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0027] See Figures 1-3 As shown, this utility model provides a sealed low-temperature cooking food bag, which includes: a bag body 01, a sealing rib 04, a main ear strap 06, a secondary ear strap 02, a buckle 05, and a buckle hole 03. The top of the bag body 01 has an opening, and a sealing rib 04 is provided at the opening and on the inner side of the top of the bag body 01. The sealing rib 04 is used to open or close the opening of the bag body 01. A main ear strap 06 is provided on one side of the top of the bag body 01, and a secondary ear strap 02 is provided on the other side of the top of the bag body 01. A buckle 05 is provided on the main ear strap 06, and a buckle hole 03 is provided on the secondary ear strap 02. The buckle 05 and the buckle hole 03 are connected by interlocking 05. The bag body 01, the sealing rib 04, the main ear strap 06, and the secondary ear strap 02 are integrally formed.
[0028] Among them, two sealing strip ribs 04 are selected; three buckles 05 are selected; and three buckle holes 03 are selected.
[0029] The bag body 01, sealing strip 04, main ear strap 06, auxiliary ear strap 02, buckle 05, and buckle hole 03 are all integrally molded; the bag body 01, sealing strip 04, main ear strap 06, auxiliary ear strap 02, buckle 05, and buckle hole 03 are all made of thermoplastic polyolefin (TPO); the thermoplastic polyolefin (TPO) material is food-grade thermoplastic polyolefin (TPO);
[0030] Specifically, the bag body 01 is selected as an elliptical cylinder; that is, the major axis of the bottom ellipse of the bag body 01 is smaller than the major axis of the top ellipse of the bag body 01, and the minor axis of the bottom ellipse of the bag body 01 is larger than the minor axis of the top ellipse of the bag body 01. The bottom ellipse and the top ellipse of the bag body 01 are smoothly connected, that is, the side is a smooth transition surface;
[0031] The tilt angle α of one side of the bag body 01 ranges from 5° to 10°; the tilt angle β of the other side of the bag body 01 ranges from 5° to 10°; the tilt angle α and the tilt angle β are equal.
[0032] The bag wall of the bag body 01 gradually thins from the bottom to the top, that is, the bottom of the bag body 01 is the thinnest and the top of the bag body 01 is the thinnest; the thickness of the bag wall of the bag body 01 is between 0.4mm and 1.2mm.
[0033] See Figure 4 As shown, the main ear strap 06, the secondary ear strap 02, the buckle 05, and the buckle hole 03 can be connected to form a carrying strap, which makes it convenient to carry the food bag.
[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A sealed low-temperature retort pouch, characterized in that, The sealed low-temperature cooking food bag includes: a bag body, a sealing rib, a main ear strap, a secondary ear strap, a buckle, and a fastening hole. The top of the bag body has an opening, and the sealing rib is provided at the opening and on the inner side of the top of the bag body. The sealing rib is used to open or close the opening of the bag body. The main ear strap is provided on one side of the top of the bag body, and the secondary ear strap is provided on the other side of the top of the bag body. The buckle is provided on the main ear strap, and the fastening hole is provided on the secondary ear strap. The buckle and the fastening hole are interlocked. The bag body, the sealing rib, the main ear strap, and the secondary ear strap are integrally formed.
2. The sealed sous vide food bag of claim 1, wherein, At least two sealing strips are selected.
3. The sealed sous vide food bag of claim 1, wherein, At least two buckles are selected.
4. The sealed sous vide food bag of claim 3, wherein, The same number of buckles and buckle holes are selected.
5. The sealed sous vide food bag of claim 1, wherein, The bag body, sealing ribs, main ear straps, secondary ear straps, buckles, and buckle holes are all integrally molded.
6. A sealed sous vide food bag according to claim 5, wherein, The bag body, sealing strap, main ear strap, secondary ear strap, buckle, and buttonhole are all made of thermoplastic polyolefin material.
7. The sealed sous vide food bag of claim 1, wherein, The bag body is selected as an elliptical cylinder.
8. The sealed sous vide food bag of claim 7, wherein, The major axis of the bottom ellipse of the bag body is smaller than the major axis of the top ellipse of the bag body, and the minor axis of the bottom ellipse of the bag body is larger than the minor axis of the top ellipse of the bag body.
9. A sealed sous vide food bag according to claim 8, wherein, The inclination angle α of one side of the bag body ranges from 5° to 10°; the inclination angle β of the other side of the bag body ranges from 5° to 10°.
10. The sealed sous vide food bag of claim 9, wherein, The tilt angles α and β are equal.