Barrier bag

Abstract

The utility model provides a barrier bag which comprises a bag body, a pipe body and a pipe cap, the bag body comprises two layers of barrier materials, the edges of the two layers of barrier materials are sealed in a hot pressing mode to form a sealing edge, the pipe body serves as a unique outlet of a bag body containing cavity and is sealed on the edge of the bag body, and the pipe body is sealed by the pipe cap. The packaging bag is characterized in that a sealing belt with a sharp corner is formed between the two layers of barrier materials below the pipe body in a secondary sealing mode, the sharp corner protrudes in the direction away from the pipe body, the two ends of the sealing belt are connected with the sealing edge of the bag body, the interior of the bag body is separated into two sealing cavities, the smaller sealing cavity is communicated with the pipe body, and the other sealing cavity is communicated with the pipe body. The heat sealing strength of the sealing edge is larger than that of the sealing tape, and the sealing tape is broken through when the content is manually extruded to the sharp corner, so that the two sealing cavities are communicated. Therefore, the barrier bag still has high barrier property after the tube body is added.

Description

Technical Field

[0001] This utility model relates to the field of packaging bags, and more specifically to a barrier bag. Background Technology

[0002] Barrier materials (such as aluminum foil, MPET, TPET, etc.) can be made into barrier bags (packaging bags) to package contents with a long shelf life. In the prior art, the body of the barrier bag consists of two layers of barrier material, which are heat-sealed at all four sides. When the barrier bag is used to package contents that cannot be used up at once, such as sauces, a tube and a cap are usually set at the edge of the barrier bag. The tube is placed directly between the two layers of barrier material and heat-sealed together. One end of the tube extends out of the seal and is sealed by the cap.

[0003] However, this sealing method has certain drawbacks. Due to the heat-sealing process between the tube and the two layers of barrier material, gaps are easily created, resulting in areas with poor sealing. According to the barrel effect, these areas with poor sealing will make the overall barrier bag's barrier performance and airtightness inadequate. This makes it easy for external air to leak into the barrier bag through the heat-sealing parts on both sides of the tube or the connection between the tube and the cap, and leakage is likely to occur. The contents will come into contact with the outside air before the bag is even opened, resulting in a short shelf life for the contents. Utility Model Content

[0004] The purpose of this invention is to provide a barrier bag that still has high barrier properties after the tube body is added.

[0005] To achieve the above objectives, the solution of this utility model is:

[0006] A barrier bag includes a bag body, a tube, and a cap. The bag body comprises two layers of barrier material, and the edges of the two layers of barrier material are heat-sealed to form a sealing edge. The tube serves as the only outlet of the bag body cavity and is sealed on the edge of the bag body. The tube is also sealed by the cap. A secondary seal is formed between the two layers of barrier material below the tube, creating a sealing strip with a sharp angle protruding away from the tube. The two ends of the sealing strip are connected to the sealing edge of the bag body, dividing the interior of the bag body into two sealed chambers. The smaller sealed chamber is connected to the tube. The heat-sealing strength of the sealing edge is greater than that of the sealing strip. The sealing strip is ruptured when the contents are squeezed to the sharp angle, allowing the two sealed chambers to connect.

[0007] Furthermore, the heat sealing strength of the sealing edge is greater than 40N / 15mm, and the heat sealing strength of the sealing strip is 8N / 15mm-10N / 15mm.

[0008] Furthermore, the heat sealing temperature of the sealing edge is greater than 190℃, and the heat sealing temperature of the sealing strip is 150-170℃.

[0009] Furthermore, the sealing strip is V-shaped, and the tube is located at the corner of the bag's edge, with the pointed corner of the sealing strip facing the tube.

[0010] Furthermore, the sharp corners of the sealing strip are obtuse angles.

[0011] Furthermore, the barrier material of the bag body is aluminum foil, MPET, TPET, or a barrier film material.

[0012] Furthermore, the width of the sealing strip gradually decreases from both ends of the connecting sealing edge towards the middle sharp corner, where the sealing strip width is the smallest.

[0013] By adopting the above solution, this utility model has at least the following technical effects:

[0014] 1. By setting a sealing strip inside the bag body, the inside of the bag body is divided into two sealed chambers. The smaller sealed chamber is connected to the tube body, thereby confining the oxygen and water vapor that permeate from the tube body into the smaller sealed chamber, isolating it from the contents in the other sealed chamber inside the bag body, thus extending the shelf life of the contents.

[0015] 2. The heat-sealing strength of the sealing tape is controlled at 8N / 15mm-10N / 15mm and is set with a sharp corner. This allows consumers to easily squeeze the contents of the barrier bag from bottom to top to the vicinity of the sealing tape when opening the bag after purchasing the goods. Since the sharp corner protrudes towards the contents, this sharp corner forms a weak point. After being subjected to a certain pressure, it can be easily squeezed to break through the two sealed chambers inside the bag, connecting them. Further squeezing at this point will completely break through the sealing tape, and the contents can be squeezed out of the barrier bag relatively smoothly through the tube.

[0016] 3. It ensures the pressure resistance and sealing performance of the barrier bag. When the barrier bag is compressed or falls from the shelf, the high heat-sealing strength of the sealing edge and the protective layer of the sealing tape can prevent the contents of the bag from leaking out. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Explanation of icon numbers:

[0019] 10 Barrier bag; 1 Bag body; 11 Sealing edge; 12 Sealing tape; 121 Sharp corner; 13 First sealing chamber; 14 Second sealing chamber; 2 Tube body; 3 Tube cap. Detailed Implementation

[0020] To further explain the technical solution of this utility model, the following detailed description is provided through specific embodiments.

[0021] See Figure 1The present invention provides a barrier bag 10, which includes a bag body 1, a tube body 2, and a tube cap 3. The bag body 1 includes two layers of barrier material and the edges of the two layers of barrier material are heat-pressed and sealed to form a sealing edge 11. The tube body 2 serves as the only outlet of the cavity of the bag body 1 and is sealed on the bag body 1, and the tube body 2 is sealed by the tube cap 3.

[0022] A sealing strip 12 with a sharp corner 121 is formed by a secondary seal between the two layers of barrier material below the tube body 2. The sharp corner 121 protrudes in a direction away from the tube body 2. The two ends of the sealing strip 12 are connected to the sealing edge 11 around the bag body 1, and the inside of the bag body 1 is divided into two sealed chambers. For easy distinction, in this embodiment, they are divided into a first sealed chamber 13 and a second sealed chamber 14, the smaller one being the first sealed chamber 13 and the first sealed chamber 13 being connected to the tube body 2.

[0023] The heat-sealing strength of the sealing edge 11 is greater than that of the sealing strip 12, and the sealing strip 12 can be ruptured when the contents are squeezed to the sharp corner 121, so that the two sealed chambers can be connected. In this embodiment, the heat-sealing strength of the sealing edge 11 is greater than 40N / 15mm, and the heat-sealing strength of the sealing strip 12 is 8N / 15mm-10N / 15mm.

[0024] In the above structure, when the barrier bag 10 of this embodiment is filled with contents and placed on the shelf for sale, the oxygen and water vapor that permeate in from the tube body 2 will be confined in the first sealed chamber 13 by the sealing strip 12, while the second sealed chamber 14 is used to fill the contents. Therefore, the oxygen and water vapor will be isolated from the contents, thus extending the shelf life of the contents.

[0025] When a consumer purchases goods packaged in the barrier bag 10 and needs to open the barrier bag 10 to use its contents, the heat-sealing strength of the sealing strip 12 is controlled at 8N / 15mm-10N / 15mm and is set with a sharp corner 121. When opening the bag, the contents inside the barrier bag 10 can be easily squeezed to the vicinity of the sealing strip 12 by hand. Since the sharp corner 121 protrudes towards the contents, the sharp corner 121 is easily broken by pressure and the sealing strip 12 is opened, so that the first sealing chamber 13 and the second sealing chamber 14 inside the bag body 1 are connected, and the contents can be squeezed out of the barrier bag 10 through the tube 2.

[0026] To ensure the aforementioned heat-sealing strength, in this embodiment, the heat-sealing temperature of the sealing edge 11 is greater than 190°C, and the heat-sealing temperature of the sealing strip 12 is 150-170°C. Furthermore, due to the enhanced heat-compression strength of the surrounding sealing edges 11, leakage of the contents can be prevented when the barrier bag 10 is subjected to pressure or falls from a shelf.

[0027] In this embodiment, the sealing strip 12 is V-shaped, and the tube 2 is located at the corner of the edge of the bag. The sharp corner 121 of the sealing strip 12 faces the tube 2 so that the contents can easily break through the sealing strip 12 when the bag is opened.

[0028] In this embodiment, the pointed corner 121 of the sealing strip 12 is an obtuse angle.

[0029] In this embodiment, the barrier material of the bag body 1 can be aluminum foil, MPET, TPET, or a barrier film material. TPET refers to a PET substrate coated with a barrier material, such as aluminum oxide or silicon oxide.

[0030] In this embodiment, the width of the sealing strip 12 gradually decreases from both ends of the connecting sealing edge 11 to the middle sharp corner 121. The width of the sealing strip 12 at the sharp corner 121 is the smallest, which further ensures that when the entire sealing strip 12 is squeezed by the contents, it will first be stretched open from the sharp corner 121, which is more labor-saving.

[0031] The above is merely one embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A barrier bag, comprising a bag body, a tube, and a cap, wherein the bag body comprises two layers of barrier material and the edges of the two layers of barrier material are heat-sealed to form a sealing edge, and the tube serves as the sole outlet of the bag body cavity, sealed on the edge of the bag body, and the tube is sealed by the cap, characterized in that: A secondary seal is formed between the two layers of barrier material below the tube, creating a sealing strip with a sharp angle protruding away from the tube. The two ends of the sealing strip are connected to the sealing edge of the bag body, dividing the inside of the bag body into two sealed chambers. The smaller sealed chamber is connected to the tube body. The heat seal strength of the sealing edge is greater than that of the sealing strip. The sealing strip is broken when the contents are squeezed to the sharp angle, so that the two sealed chambers can be connected.

2. The barrier bag according to claim 1, characterized in that: The heat seal strength of the sealing edge is greater than 40N / 15mm, and the heat seal strength of the sealing strip is 8N / 15mm-10N / 15mm.

3. A barrier bag according to claim 1, characterized in that: The heat sealing temperature of the sealing edge is greater than 190℃, and the heat sealing temperature of the sealing strip is 150-170℃.

4. A barrier bag according to any one of claims 1 to 3, characterized in that: The sealing tape is V-shaped, and the tube is located at the corner of the bag's edge, with the pointed corner of the sealing tape facing the tube.

5. A barrier bag according to claim 4, characterized in that: The sharp corners of the sealing strip are obtuse angles.

6. A barrier bag according to claim 3, characterized in that: The barrier material of the bag body is aluminum foil, MPET, TPET, or a barrier film material.

7. A barrier bag according to claim 4, characterized in that: The width of the sealing strip gradually decreases from both ends of the connecting sealing edge towards the pointed corner in the middle, with the sealing strip being the narrowest at the pointed corner.

Images