Low-melting-point compatible direct-throwing packaging bag for automatic packaging of powdered carbon black

Abstract

The utility model belongs to the technical field of packaging bags, and discloses a low-melting-point compatible direct-throwing packaging bag for automatic packaging of powder carbon black, which comprises a bag body, the bag body is formed by blow molding of a base material film, the upper end of the bag body is provided with an upper heat sealing area, the lower end of the bag body is provided with a lower heat sealing area, and the middle position of the bag body is provided with a middle heat sealing area. A labyrinth sealing line is arranged on the middle heat sealing area; the powder carbon black filling and sealing device is simple in overall structure, can automatically fill and seal powder carbon black conveniently, protect the surrounding environment and protect the health of workers, can be directly used, saves resources, and improves the using effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of packaging bags, and specifically relates to a low-melting-point compatible direct-injection packaging bag for automatic packaging of powdered carbon black. Background Art

[0002] With the improvement of environmental protection requirements and the degree of production automation, as the main raw material in the rubber and plastic processing industries, the packaging of carbon black must adopt automated and direct-injection packaging.

[0003] Carbon black is divided into granulated carbon black and powdered carbon black after granulation according to products.

[0004] Granulated carbon black is a process in which the easily flying powdered carbon black becomes granular in a granulator by relying on its continuous rotation after wet or dry granulation. After granulation, carbon black is convenient for transportation and use, and at the same time, it reduces the pollution to the working environment.

[0005] After granulation, the automated and compatible direct-injection packaging of granulated carbon black has been popularized.

[0006] Powdered carbon black has not undergone the granulation process. It has small particle size, large specific surface area, high black brightness, and the characteristics of being easy to disperse, so it can be used as pigment carbon black and conductive carbon black for rubber and plastic products.

[0007] However, because its mesh number is generally 800 - 2000 meshes and the particle size is extremely fine, it is easy to fly, difficult to exhaust after packaging, and difficult to transport.

[0008] In the prior art, kraft paper valve bags are mainly used to package powdered carbon black. A vacuum filling machine is used to fill the valve bags into the air pressure tank. This packaging cannot be directly put in together. Workers need to subpackage according to the weight of powdered carbon black required by the formula. During subpackaging, a large amount of powdered carbon black will float in the production environment, causing pollution to the environment and harm to the health of workers. Similarly, the kraft paper bags after subpackaging also need to be treated as solid waste, resulting in waste of resources and environmental pollution. Content of the Utility Model

[0009] The main technical problem to be solved by the utility model is to provide a low-melting-point compatible direct-injection packaging bag for automatic packaging of powdered carbon black with a simple overall structure, which can facilitate automatic filling and sealing of powdered carbon black, protect the surrounding environment, protect the health of workers, and can be directly put in during use, save resources, and improve the use effect.

[0010] To solve the above technical problems, the utility model provides the following technical solutions:

[0011] A low-melting-point compatible direct-injection packaging bag for automatic packaging of powdered carbon black, comprising a bag body. The bag body is blow-molded from a base film. The upper end of the bag body is set as the upper heat-sealing area, the lower end of the bag body is set as the lower heat-sealing area, and the middle position of the bag body is set as the middle heat-sealing area. A labyrinth seal line is arranged on the middle heat-sealing area;

[0012] The base film includes an inner layer film, and the thickness of the inner layer film is set to 1.5 - 2 mm;

[0013] A skeleton layer film is adhered to one side of the inner layer film, and the thickness of the skeleton layer film is set to 6 - 7 mm;

[0014] An outer layer film is adhered to the other side of the skeleton layer film, and the thickness of the outer layer film is set to 1.5 - 2 mm.

[0015] The following is a further optimization of the above technical solution by the present utility model:

[0016] The inner layer film and the outer layer film belong to heat-sealing layers.

[0017] Further optimization: The overall thickness of the bag body is set to 0.08 - 0.12 mm.

[0018] Further optimization: The base film is made of a material with a melting point of 83 ± 3 °C.

[0019] Further optimization: One side in the length direction of the base film is set as the left heat-sealing area, and the other side in the length direction of the base film is set as the right heat-sealing area. The left heat-sealing area and the right heat-sealing area coincide and form the middle heat-sealing area after heat-sealing by heating.

[0020] Further optimization: The widths of the upper heat-sealing area and the lower heat-sealing area are both set to 4 - 6 mm.

[0021] Further optimization: The ironing width of the labyrinth seal line is set to 1 - 3 mm.

[0022] The present utility model adopts the above technical solution, with a clever concept and reasonable structure. It can cooperate with an automatic packaging machine to achieve automatic filling and sealing during the filling process of powdered carbon black, and can follow the powdered carbon black for direct injection after filling, avoiding the generation of additional solid waste, thereby saving resources for treating solid waste, saving resources, while ensuring the surrounding environment and improving the production efficiency.

[0023] The bag body of this packaging bag is blow-molded by a co-extrusion device using a three-layer structure base film. Among them, the outer layer film and the inner layer film are heat-sealing layers, which are convenient for heat-sealing on automatic packaging equipment. A skeleton layer film is arranged in the middle to provide effective stiffness for the base film, thereby ensuring the stability of the base film during the filling and use process. At the same time, it is made of a material with a melting point of 83 ± 3 °C, meeting the processing temperature of powdered carbon black and being able to be completely compatible with rubber during direct injection, making it convenient to use.

[0024] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments. Description of the Drawings

[0025] Figure 1 is the front view of the overall structure in the embodiment of the present utility model;

[0026] Figure 2 is the schematic diagram of the unfolding of the base material film in the embodiment of the present utility model;

[0027] Figure 3 is the schematic diagram of the structure of the base material film before blow molding in the embodiment of the present utility model.

[0028] In the figure: 1, bag body; 11, base material film; 12, outer layer film; 13, inner layer film; 14, skeleton layer film; 2, upper heat-sealing area; 3, lower heat-sealing area; 4, middle heat-sealing area; 41, left heat-sealing area; 42, right heat-sealing area; 5, labyrinth seal line. Specific Embodiments

[0029] As Figures 1-3 shown: A low-melting-point compatible direct-injection packaging bag for automatic packaging of powdered carbon black, including a bag body 1, the bag body 1 is made by blow molding a base material film 11, the upper end of the bag body 1 is set as an upper heat-sealing area 2, the lower end of the bag body 1 is set as a lower heat-sealing area 3, the middle position of the bag body 1 is set as a middle heat-sealing area 4, and a labyrinth seal line 5 is provided on the middle heat-sealing area 4;

[0030] The base material film 11 includes an inner layer film 13, and the thickness of the inner layer film 13 is set to 2 mm.

[0031] A skeleton layer film 14 is adhered to one side of the inner layer film 13, and the thickness of the skeleton layer film 14 is set to 6 mm.

[0032] An outer layer film 12 is adhered to the other side of the skeleton layer film 14, and the thickness of the outer layer film 12 is set to 2 mm.

[0033] In this embodiment, the inner layer film 13 and the outer layer film 12 belong to heat-sealing layers and can be well heat-sealed when used on automatic packaging equipment.

[0034] The skeleton layer film 14 can provide effective stiffness for the base material film 11, facilitating the continuous and stable packaging of the base material film 11 on an automatic packaging machine.

[0035] The overall thickness of the bag body 1 is set to 0.1 mm.

[0036] The base film 11 is made of a material with a melting point of 83 ± 3 °C. With this design, this melting point meets the processing temperature of powdered carbon black. When the packaging bag containing powdered carbon black is used, it can be completely compatible with rubber without causing other resource waste and while protecting the environment.

[0037] An exhaust hole is also provided on the bag body 1, which is not marked in the figure. In the commonly used packaging bags for carbon black, the exhaust hole structure is already an existing technology and will not be elaborated here.

[0038] As Figure 2 shown, one side in the length direction of the base film 11 is set as the left heat-sealing area 41, and the other side in the length direction of the base film 11 is set as the right heat-sealing area 42.

[0039] The middle heat-sealing area 4 is formed by overlapping the left heat-sealing area 41 and the right heat-sealing area 42 and then heat-sealing through heating.

[0040] The labyrinth seal line 5 is carried out simultaneously by an automatic packaging machine during the formation of the middle heat-sealing area 4. Through the labyrinth seal line 5 for labyrinth exhaust, during filling, it prevents powdered carbon black from passing through the exhaust hole, and at the same time, the exhaust effect is enhanced during the filling and sealing process and after filling, which further facilitates transportation.

[0041] In this embodiment, the bag body 1 is completed by blow molding the base film 11 through a co-extrusion device. With this design, the outer layer film 12 and the inner layer film 13 serve as heat-sealing layers, ensuring enhanced heat-sealing effect of the base film 11 on the automatic packaging machine.

[0042] The widths of the upper heat-sealing area 2 and the lower heat-sealing area 3 are set to 4 - 6 mm. In this embodiment, the widths of the upper heat-sealing area 2 and the lower heat-sealing area 3 are set to 5 mm. With this design, the strength of the bag body 1 is further enhanced.

[0043] The ironing width of the labyrinth seal line 5 is set to 2 mm.

[0044] In the prior art, the specific process of setting the labyrinth seal line 5 on the bag body 1 is well-known and widely used, and will not be elaborated here.

[0045] For those of ordinary skill in the art, according to the teachings of the present invention, without departing from the principles and spirit of the present invention, the changes, modifications, substitutions, and deformations made to the embodiments still fall within the protection scope of the present invention.

Claims

1. A low melting point compatible direct-feed packaging bag for automatic packaging of powdered carbon black, comprising a bag body (1), characterized in that: The bag body (1) is made by blow molding of a base film (11); the upper end of the bag body (1) is arranged as an upper heat-sealing area (2); the lower end of the bag body (1) is arranged as a lower heat-sealing area (3); the middle position of the bag body (1) is arranged as an intermediate heat-sealing area (4); and a labyrinth sealing line (5) is arranged on the intermediate heat-sealing area (4); The substrate film (11) comprises an inner layer film (13), and the thickness of the inner layer film (13) is set to 1.5-2 mm; A skeleton layer film (14) is adhered to one surface of the inner layer film (13), and the thickness of the skeleton layer film (14) is set to 6-7 mm; An outer layer film (12) is adhered to the other side of the skeleton layer film (14), and the thickness of the outer layer film (12) is set to be 1.5-2 mm.

2. The low melting point compatible direct-drop packaging bag for automatic packaging of powdered carbon black according to claim 1, characterized in that: The inner film (13) and the outer film (12) are heat-sealed layers.

3. The low melting point compatible direct-drop packaging bag for automatic packaging of powdered carbon black according to claim 2, characterized in that: The overall thickness of the bag body (1) is set to 0.08-0.12 mm.

4. The low melting point compatible direct-drop packaging bag for automatic packaging of powdered carbon black according to claim 3, characterized in that: The substrate film (11) is made of a material with a melting point of 83±3°C.

5. The low melting point compatible direct-drop packaging bag for automatic packaging of powdered carbon black according to claim 4, characterized in that: One side of the substrate film (11) in the length direction is set as a left heat-sealing area (41), and the other side of the substrate film (11) in the length direction is set as a right heat-sealing area (42). The left heat-sealing area (41) and the right heat-sealing area (42) overlap and are heated and plastic-sealed to form an intermediate heat-sealing area (4).

6. The low melting point compatible direct-drop packaging bag for automatic packaging of powdered carbon black according to claim 5, characterized in that: The widths of the upper heat-sealing area (2) and the lower heat-sealing area (3) are both set to 4-6 mm.

7. The low melting point compatible direct-drop packaging bag for automatic packaging of powdered carbon black according to claim 6, characterized in that: The ironing line width of the labyrinth sealing line (5) is set to 1-3 mm.

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