A heat-sealable woven square-bottom bag

Abstract

This utility model relates to the field of valve bag technology and discloses a heat-sealable woven square bottom bag, including a valve bag body, an exposed end fixedly installed on the valve bag body, and a feed port opened inside the exposed end; a protruding lip is fixedly installed on the upper end of the exposed end opposite to the valve bag body, and adhesive is embedded in the protruding lip; an easy-tear strip adapted to the adhesive is movably installed on the valve bag body at a corresponding position. When bent into place, the adhesive allows the exposed end to establish a stable connection with the valve bag body, making sealing simple and convenient. Furthermore, the design of the easy-tear strip and connecting paper allows users to easily tear open the connecting part, directly exposing the feed port on the bag body without the need for scissors or knives, facilitating daily use.

Description

Technical Field

[0001] This utility model relates to the field of valve bag technology, specifically a heat-sealed woven square bottom bag. Background Technology

[0002] Heat-sealed woven plastic square-bottom bags are a special type of packaging bag that combines the features of plastic weaving technology and heat-sealing process. Material is fed from the top or bottom valve and filled using specialized equipment, forming a square shape that is neatly stacked and aesthetically pleasing. These bags are considered environmentally friendly and are commonly used in the packaging industry, agriculture, and food sectors for large quantities of granular or powdered materials that require long-term storage, such as fertilizers, feed, flour, sugar, and cement. Valve-type packaging bags are widely used in the production of powders such as stone powder, gypsum powder, mud powder, and cement powder.

[0003] A patent document with publication number CN215623872U discloses a self-sealing heat-sealing bottom plastic square-bottom valve bag, including a valve bag body. A feed port is provided on the top of one side of the valve bag body, and a rectangular through-hole plastic film is provided in the feed port. One end of the through-hole plastic film extends into the valve bag body and forms a sealing area. The top of the through-hole plastic film is fixedly connected to the inner top surface of the valve bag body, and the inner bottom surface of the feed port extends into the valve bag body and is fixedly connected to the bottom of the through-hole plastic film.

[0004] However, the above-mentioned device has the following problems when in use: When using the existing square bottom valve bag, it is generally necessary to use specific tools such as scissors or knives to open the valve on the bag and pour out the contents smoothly. Therefore, users usually cut open the bag and take it directly, which can easily cause dust to fly, which is not good for the environment and health. Utility Model Content

[0005] The purpose of this utility model is to solve the problems existing in the prior art and propose a heat-sealed woven square bottom bag. After bending into place, the adhesive can establish a stable connection between the exposed end and the valve bag body, making the sealing process simple and convenient. Furthermore, the design of the easy-tear strip and connecting paper allows users to easily tear open the connecting part, allowing the feed port on the bag body to be directly exposed without the need for scissors or knives, making it convenient for daily use.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A heat-sealing woven square bottom bag includes a valve bag body, an exposed end fixedly installed on the valve bag body, and a material inlet is opened inside the exposed end;

[0008] A protruding lip is fixedly installed on the upper end of the exposed end, which is away from the valve bag body, and adhesive is inlaid on the protruding lip.

[0009] The valve bag body is movably fitted with an easy-tear strip that is compatible with the adhesive at the corresponding position.

[0010] Preferably, a yellow sealing paper is movably installed on the side of the adhesive away from the exposed end.

[0011] Preferably, a connecting paper is fixedly installed on the easy-tear strip, and the connecting paper is directly exposed and not connected to the valve bag body.

[0012] Preferably, the valve bag body has equidistant and evenly spaced ventilation channels on the side facing the feed inlet.

[0013] Preferably, the ventilation channel is located between the exposed end and the tear strip.

[0014] Preferably, the ventilation channel can be completely blocked by the exposed end after being fully folded into place.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] (1) This utility model is provided with a valve bag body, an exposed end, a feed port, a protruding lip, an easy-tear strip, a connecting paper, adhesive, and a yellow sealing paper. When bent into place, the adhesive can establish a stable connection between the exposed end and the valve bag body, making the sealing activity simple and convenient. The design of the easy-tear strip and the connecting paper allows users to easily tear open the connecting part, so that the feed port on the bag body can be directly exposed without the need for scissors or knives, making it convenient for daily use.

[0017] (2) This utility model has a ventilated channel and an exposed end. The ventilated channel design allows air to be discharged from the bag during the filling process, which reduces the pressure inside the bag, speeds up the filling speed, and improves work efficiency. In the unopened state, the ventilated channel can be completely blocked by the exposed end, which can prevent dust leakage and keep the environment clean. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a heat-sealed woven square bottom bag proposed in this utility model;

[0019] Figure 2 This is a schematic diagram showing the location of the ventilation channel in a heat-sealed woven square bottom bag according to this utility model;

[0020] Figure 3 This utility model proposes a heat-sealing woven square bottom bag. Figure 2 Enlarged view of point A in the middle.

[0021] In the diagram: 1. Valve bag body; 2. Exposed end; 3. Feed inlet; 4. Protruding lip; 5. Easy-tear strip; 6. Connecting paper; 7. Adhesive; 8. Yellow sealing paper; 9. Ventilation channel. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Please see Figures 1 to 3 A heat-sealed woven square bottom bag includes a valve bag body 1, an exposed end 2 fixedly installed on the valve bag body 1, and a feed inlet 3 opened inside the exposed end 2. The valve bag body 1, the exposed end 2 and the feed inlet 3 are the same as the common valve bag design and the folding method are also the same, so they will not be described again.

[0024] When in use, simply place the injection port onto the feed port 3 of the exposed end 2, so that the injection port is connected to the cavity inside the valve bag body 1, and the injection activity can be carried out smoothly.

[0025] A protruding lip 4 is fixedly installed on the upper end of the exposed end 2 on the side away from the valve bag body 1, and an adhesive 7 is inlaid on the protruding lip 4.

[0026] The exposed end 2, the feed port 3, and the protruding lip 4 can be integrally molded with the valve bag body 1.

[0027] The valve bag body 1 has an easy-tear strip 5 that is compatible with the adhesive 7 installed in the corresponding position. It can be directly installed on the valve bag body 1. The easy-tear strip 5 can be pasted on the valve bag body 1, or the easy-tear line can be directly cut on the outer layer of the double-layer valve bag body 1. Production personnel can decide according to actual needs.

[0028] After the filling is completed, when the exposed end 2 is folded into place manually or by machine, the adhesive 7 on the protruding lip 4 will come into contact with the easy-tear strip 5. By establishing a connection between the protruding lip 4 and the easy-tear strip 5, the valve bag can be successfully sealed.

[0029] When using a machine to heat seal the opening, the adhesive 7 can be set as a hot melt adhesive, which is melted by heating to further establish a stable seal.

[0030] A yellow sealing paper 8 is movably installed on the side of the adhesive 7 away from the exposed end 2.

[0031] When manual sealing is used, the adhesive 7 can be a self-adhesive adhesive. Simply tear open the yellow sealing paper 8 manually, and after folding the exposed end 2 into place, a stable connection can be established between the protruding lip 4 and the easy-tear strip 5, facilitating quick sealing.

[0032] A connecting paper 6 is fixedly installed on the easy-tear strip 5, and the connecting paper 6 is directly exposed and not connected to the valve bag body 1.

[0033] Simply pull the connecting paper 6 to move the easy-tear strip 5 synchronously, thus completing the quick opening action.

[0034] The valve bag body 1 has equidistant and uniformly spaced ventilation channels 9 on the side facing the feed inlet 3. During the filling process, the ventilation channels 9 allow air inside the bag to be discharged, reducing the pressure inside the bag and thus reducing the risk of dust flying.

[0035] It is worth noting that the actual aperture of the ventilation channel 9 should only allow gas to escape, and dust should not be able to escape. The size shown in the diagram is only to better demonstrate the existence of the ventilation channel 9.

[0036] The ventilation channel 9 is located between the exposed end 2 and the easy-tear strip 5, and the ventilation channel 9 can be completely blocked by the exposed end 2 after being fully folded into place.

[0037] After the material is filled, the folded exposed end 2 can completely seal the ventilation channel 9, preventing material leakage or external dust from entering during subsequent use, and facilitating transportation and use.

[0038] The workflow of this utility model is as follows: Prepare the packaging bag, ensuring the heat-sealed woven square bottom bag is intact. Then, attach the filling port to the inlet port 3 at the exposed end 2, connecting the filling port to the cavity inside the valve bag body 1. Begin filling the bag with material through the filling port. During the filling process, the venting channel 9 allows air inside the bag to escape, reducing the pressure inside the bag and preventing dust from flying.

[0039] After the material is filled, the exposed end 2 is completely folded over so that the protruding lip 4 fits against the easy-tear strip 5. After the material is filled, the folded exposed end 2 can completely block the ventilation channel 9, preventing material leakage or external dust from entering during subsequent use, and facilitating transportation and use.

[0040] When using machine heat sealing for the opening: Adhesive 7 is designed as a hot melt adhesive, which melts upon heating, further establishing a stable seal.

[0041] When manual sealing is used: the adhesive 7 is designed with a self-adhesive color. Tear off the yellow sealing paper 8 to expose the adhesive 7, fold the exposed end 2 into place, so that the protruding lip 4 and the easy-tear strip 5 establish a stable connection.

[0042] When materials are needed, the easy-tear strip 5 can be quickly torn open by connecting paper 6, and the exposed end 2 can be opened to pour out the materials.

[0043] 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 heat-seal plastic woven square-bottom bag, comprising a valve bag body (1), a exposed end (2) is fixedly installed on the valve bag body (1), an inlet (3) is arranged in the inside of the exposed end (2), characterized in that, A protruding lip (4) is fixedly installed on the upper side of the exposed end (2) away from the valve pocket body (1), and an adhesive (7) is inlaid on the protruding lip (4); The valve bag body (1) is movably installed with an easy-tear strip (5) that is compatible with the adhesive (7) at the corresponding position.

2. The heat-sealable woven-sided flat-bottom bag according to claim 1, wherein Yellow sealing paper (8) is movably installed on the side of the adhesive (7) away from the exposed end (2).

3. The heat-sealable woven-sided flat-bottom bag according to claim 1, wherein A connecting paper (6) is fixedly installed on the easy-tear strip (5), and the connecting paper (6) is directly exposed and not connected to the valve bag body (1).

4. The heat-sealable woven-sided flat-bottom bag of claim 1, wherein, The valve bag body (1) has equidistant and uniformly spaced ventilation channels (9) on the side facing the feed inlet (3).

5. The heat-sealable woven-sided flat-bottom bag of claim 1, wherein, The ventilation channel (9) is located between the exposed end (2) and the easy-tear strip (5).

6. The heat-sealable woven-sided flat-bottom bag of claim 1, wherein, The ventilation channel (9) can be completely blocked by the exposed end (2) after being fully folded into place.

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