Nonwoven fabric carbon black packaging bag

Abstract

The utility model discloses a non -woven fabric carbon black packing bag relates to packing bag technical field, including the bag body, the bag body inside is non -woven fabric bag body, and the bag body outside is plastic bag body, and the both ends of non -woven fabric bag body are fixed with the both ends of plastic bag body and form the containing space of bag body, and the gap between non -woven fabric bag body and plastic bag body forms exhaust space, one end of bag body is provided with the valve mouth that communicates with bag body containing space, and the inboard of valve mouth is non -woven fabric valve mouth that communicates with non -woven fabric bag body, and the outboard of valve mouth is plastic valve mouth that communicates with plastic bag body, and is provided with non -woven fabric pleat layer between non -woven fabric valve mouth and plastic valve mouth, and non -woven fabric pleat layer is set up along non -woven fabric valve mouth ring and is used for filling carbon black, and exhaust space exhausts. Through the structure of non -woven fabric bag body and non -woven fabric pleat layer, solve the existing carbon black packing bag filling and exhaust difficult problem.

Description

Technical Field

[0001] This utility model relates to the field of packaging bag technology, specifically a non-woven carbon black packaging bag. Background Technology

[0002] Carbon black is an amorphous carbon that is a light, loose, and extremely fine black powder at room temperature. It is a product obtained by incomplete combustion or thermal decomposition of carbonaceous substances (coal, natural gas, heavy oil, fuel oil, etc.) under insufficient air conditions. It is usually packaged in valve bags.

[0003] Existing carbon black packaging bags, such as the convenient carbon black packaging bag disclosed in CN219135021U, focus on the sealing of the valve opening. However, in actual use, when filling carbon black with a filling machine, the air inside the bag cannot be discharged from the valve opening in time. It is necessary to discharge the excess air after filling and then seal the bag, resulting in low filling efficiency.

[0004] Therefore, how to provide a packaging bag that can simultaneously vent air during the filling of carbon black is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the purpose of this application is to overcome the shortcomings of the prior art and to propose a nonwoven carbon black packaging bag.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a non-woven carbon black packaging bag, including a bag body, the inner side of the bag body is a non-woven bag body, the outer side of the bag body is a plastic bag body, the two ends of the non-woven bag body are respectively fixed to the two ends of the plastic bag body to form the receiving space of the bag body, and the gap between the non-woven bag body and the plastic bag body forms an exhaust space. One end of the bag body is provided with a valve port communicating with the bag body's containing space. The inner side of the valve port is a non-woven fabric valve port communicating with the non-woven fabric bag body, and the outer side of the valve port is a plastic valve port communicating with the plastic bag body. A non-woven fabric pleated layer is provided between the non-woven fabric valve port and the plastic valve port. The non-woven fabric pleated layer is arranged circumferentially along the non-woven fabric valve port and is used to allow the exhaust space to exhaust air when filling carbon black.

[0007] Preferably, when the valve port is in a compressed state, both the nonwoven fabric valve port and the plastic valve port are folded inward, and the nonwoven fabric pleated layer forms a hollow structure with an "I" shaped cross-section.

[0008] Preferably, two symmetrical clamping pieces are provided on the outer side of the plastic valve port, and the two clamping pieces are located in the folded area of ​​the plastic valve port; When filling carbon black, pull the clamping piece away from the nonwoven fabric valve until the valve is in the unfolded state, at which point the nonwoven fabric pleated layer forms a hollow structure with a circular or elliptical cross-section.

[0009] Preferably, the nonwoven fabric valve port forms an exposed section at the end away from the bag body. When filling carbon black, the filling tube fits against the inner wall of the exposed section and extends into the receiving space of the bag body. The air inside the bag body enters the exhaust space and is discharged through the nonwoven fabric pleats.

[0010] Preferably, the two ends of the nonwoven bag body are respectively fixed to the two ends of the plastic bag body by heat fusion to form reinforcing ribs, and a reinforcing sheet is also provided on the outside of the reinforcing ribs. The reinforcing sheet is made of polyethylene or polypropylene.

[0011] Preferably, the plastic bag body and the plastic valve are made of polyethylene or polypropylene.

[0012] Preferably, the nonwoven bag body, the nonwoven valve opening, and the nonwoven pleated layer are all made of SSMS-type structured nonwoven fabric.

[0013] The beneficial effects achieved by this utility model due to the adoption of the above technical solution are as follows: the venting space formed between the non-woven bag body and the plastic bag body, combined with the special structure of the non-woven fabric pleated layer, allows air inside the bag to be smoothly discharged during the filling process, completing venting and sealing without additional operations, significantly improving filling efficiency. At the same time, the reinforcing ribs and reinforcing sheets enhance the overall strength of the packaging bag, ensuring its stability during transportation and storage. Furthermore, the non-woven bag body, non-woven valve, and non-woven fabric pleated layer, made of SSMS-type structure non-woven fabric, not only have good air permeability and strength, but also further improve the durability and reliability of the packaging bag. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a non-woven carbon black packaging bag according to the present invention; Figure 2 for Figure 1 A schematic diagram of the sectional view of the structure at point AA in its undeveloped state; Figure 3 for Figure 1 A schematic diagram of the cross-sectional view of the structure at point AA in its unfolded state; Figure 4 for Figure 1 Cross-sectional view of the structure at point BB; Figure 5 This is a cross-sectional view of the nonwoven fabric pleated layer of a nonwoven carbon black packaging bag according to this utility model.

[0015] The attached diagram lists the components represented by each number as follows: 1. Bag body; 11. Non-woven bag body; 12. Plastic bag body; 13. Reinforcing rib; 14. Reinforcing sheet; 2. Valve port; 21. Non-woven valve port; 211. Exposed section; 22. Plastic valve port; 221. Clamping sheet; 23. Non-woven pleated layer; 231. Upper adhesive layer; 232. Lower adhesive layer. Detailed Implementation

[0016] 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.

[0017] The core of this utility model is to provide a non-woven carbon black packaging bag to solve the problem that existing carbon black packaging bags cannot simultaneously exhaust air during carbon black filling, resulting in low filling efficiency.

[0018] The present invention will be described in detail with the following embodiments: Example

[0019] refer to Figure 1-5 A type of non-woven carbon black packaging bag, such as Figure 1 and 4 As shown, the bag includes a bag body 1, with a non-woven fabric bag body 11 on the inner side and a plastic bag body 12 on the outer side. The two ends of the non-woven fabric bag body 11 are fixed to the two ends of the plastic bag body 12, forming an accommodating space within the bag body 1. The gap between the non-woven fabric bag body 11 and the plastic bag body 12 is formed as shown in the figure. Figure 4 The exhaust space shown; Specifically, the two ends of the non-woven bag body 11 are fixed to the two ends of the plastic bag body 12 by heat fusion, forming a reinforcing rib 13 after fixing. In order to improve the strength of the upper and lower bottom surfaces of the bag body 1 and prevent the reinforcing rib 13 from cracking during handling and transportation, a reinforcing sheet 14 is also provided on the outside of the reinforcing rib 13. The reinforcing sheet 14 is made of polyethylene or polypropylene and the reinforcing rib 13 is sealed inside by heat fusion.

[0020] like Figure 1As shown, one end of the bag body 1 is provided with a valve port 2 that communicates with the accommodating space of the bag body 1. The inner side of the valve port 2 is a non-woven fabric valve port 21 that communicates with the non-woven fabric bag body 11, and the outer side of the valve port 2 is a plastic valve port 22 that communicates with the plastic bag body 12. A non-woven fabric pleated layer 23 is provided between the non-woven fabric valve port 21 and the plastic valve port 22. The non-woven fabric pleated layer 23 is arranged circumferentially along the non-woven fabric valve port 21 and is used to allow the exhaust space to exhaust when carbon black is filled.

[0021] In actual use, since the non-woven bag 11 and the plastic bag 12 are only heat-fused at both ends to form a two-layer structure, there must be a gap between them. When filling carbon black powder, the non-woven bag 11 expands first, and the air is discharged from the vent on the non-woven bag 11. Since the plastic bag 12 is not airtight, the air is eventually forced to be discharged from the non-woven pleated layer 23, thus achieving simultaneous filling and venting.

[0022] Specifically, such as Figure 5 As shown, the non-woven fabric pleated layer 23 is longitudinally cut to form an inverted trapezoidal structure. The air inside the bag body 1 is discharged from left to right. Above the non-woven fabric pleated layer 23 is the upper adhesive layer 231, which is bonded to the inner wall of the plastic valve port 22. Below the non-woven fabric pleated layer 23 is the lower adhesive layer 232, which is bonded to the outer wall of the non-woven fabric valve port 21.

[0023] During processing, the pre-processed annular nonwoven fabric pleated layer 23 is fixed between the nonwoven fabric valve port 21 and the plastic valve port 22 in the manner described above, and the valve port 2 is processed. The nonwoven fabric bag body 11 and the plastic bag body 12 are both pre-processed into a cylindrical structure with open ends, and each has a through hole of the appropriate size to the valve port 2 at the corresponding position. First, the plastic valve port 22 is passed through the through hole and heat-fused to the inner wall of the plastic bag body 12. Then, the nonwoven fabric valve port 21 is taken out from the plastic valve port 22 and passed through the through hole and heat-fused to the inner wall of the nonwoven fabric bag body 11. Then, the two ends of the nonwoven fabric bag body 11 are fixed to the two ends of the plastic bag body 12 by heat fusion, and a reinforcing piece 14 is added to complete the processing of the bag body 1.

[0024] It should be noted that the length of the non-woven fabric valve port 21 is greater than the length of the plastic valve port 22 to avoid blocking the exhaust channel.

[0025] Specifically, such as Figure 2 As shown, when the valve port 2 is in a compressed state, both the nonwoven fabric valve port 21 and the plastic valve port 22 are folded inward, and the nonwoven fabric pleated layer 23 forms a hollow structure with an "I" shaped cross-section.

[0026] like Figure 3 As shown, two symmetrical clamping pieces 221 are provided on the outer side of the plastic valve port 22, and the two clamping pieces 221 are located in the folded area of ​​the plastic valve port 22; When filling carbon black, the clamping piece 221 is pulled away from the nonwoven fabric valve port 21 until the valve port 2 is in the unfolded state, and the nonwoven fabric pleated layer 23 forms a hollow structure with a circular or elliptical cross-section.

[0027] like Figure 1 As shown, since there are no other connection points between the non-woven fabric valve port 21 and the plastic valve port 22 except for the non-woven fabric pleated layer 23, in order to prevent the non-woven fabric valve port 21 from being trapped inside the plastic valve port 22 due to friction during carbon black filling, the non-woven fabric valve port 21 forms an exposed section 211 at the end away from the bag body 1. During carbon black filling, the filling tube adheres to the inner wall of the exposed section 211 and extends into the accommodating space of the bag body 1. The air in the bag body 1 enters the exhaust space and is discharged through the non-woven fabric pleated layer 23.

[0028] After filling, the non-woven fabric valve port 21 and the plastic valve port 22 are heat-pressed to complete the sealing.

[0029] Preferably, the plastic bag body 12 and the plastic valve 22 are made of polyethylene or polypropylene.

[0030] Preferably, the nonwoven bag body 11, the nonwoven valve 21, and the nonwoven pleated layer 23 are all made of SSMS-type nonwoven fabric.

[0031] Specifically, the SSMS type nonwoven fabric has an inner and outer S layer made of ordinary nonwoven fabric, which mainly serves the function of moisture absorption to prevent moisture from entering and contaminating the carbon black after the outer plastic bag 12 is damaged; the middle S layer is a nonwoven fabric that has been waterproofed, which is mainly used to further isolate moisture; the middle M layer uses meltblown nonwoven fabric that has been electret treated, which can filter suspended particles and prevent carbon black powder from leaking out.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] 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.

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