Straw structure for plastic flexible package

Abstract

The utility model discloses a straw structure for a plastic flexible package, which comprises a straw body unit, a heat sealing unit is arranged below the straw body unit, and the lower end of the straw body unit is detachably connected with the heat sealing unit. According to the straw structure for the plastic flexible package, the straw body structure is designed into the straw body unit and the heat sealing unit which are connected with each other, so that the straw body unit has enough strength and is not prone to deformation, and the heat sealing unit can be made of materials with low melting points according to actual requirements. And the problem of unsuccessful heat sealing can be solved on the basis of not reducing the hardness of the pipe body unit. In addition, the positioning baffle is blocked on the sealing side of the packaging bag, so that the sealing of the bag can be prevented from exceeding the heat sealing seat body to cause excessive heat sealing, the sealing edge at the top end of the opening of the packaging bag can be shielded after sealing, and accumulation of dust and foreign matters is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of straws, in particular to a straw structure used for plastic soft packaging. Background Art

[0002] In order to fully realize the goal of recycling discarded packaging, the plastic flexible packaging industry faces challenges and opportunities. However, due to the complex material composition of traditional multi-layer composite plastic flexible packaging containers, it is difficult to recycle without separation, which requires a lot of cost, manpower, material resources and energy. Therefore, the use of polyethylene single material to replace multi-layer composite plastics to manufacture packaging containers has gradually become an important trend in the sustainable development of the plastic packaging field. Compared with multi-layer composite plastic flexible packaging containers, polyethylene single material packaging containers only need to be recycled and cleaned before they can be re-granulated and put into use again, which greatly reduces the cost and greatly reduces the consumption of manpower, material resources and energy.

[0003] However, the applicant discovered that there is a difficult problem in the step of sealing plastic straws when making bags of polyethylene single-material packaging containers: since the melting point of the straw structure is relatively high, but the melting point of the polyethylene single-material packaging film is much lower than that of the straw structure, this results in difficulty in sealing the straw structure at the bottom heat-sealing position with the polyethylene single-material packaging film during heat sealing.

[0004] If the heat sealing temperature is too high during sealing, especially if it is significantly higher than the melting point of the polyethylene single-material packaging film, the polyethylene single-material packaging film will shrink, deform, or even melt; if the heat sealing temperature is lowered to below the melting point of the polyethylene single-material packaging film, the bottom heat sealing position of the straw structure will be difficult to combine well with the packaging bag, and the finished packaging product will be at risk of leakage.

[0005] If the straw structure is replaced with polyethylene material with a lower melting point, although it can avoid the disadvantage that the packaging bag and the injection-molded straw cannot be well sealed, the strength of the straw will be greatly reduced and it will not work well with the sealing cover. It is easy for the cover to slip when twisting, and the material is easy to leak at the seal. Therefore, how to ensure that the bottom heat-sealed position of the straw can achieve a good heat seal with the polyethylene single-material packaging film while maintaining the sufficient strength of the straw body and ensuring a good heat-sealing effect has become a key issue that needs to be solved in the manufacture of polyethylene single-material packaging containers. Utility Model Content

[0006] The utility model aims at solving the problems existing in the prior art and provides a straw structure for plastic soft packaging.

[0007] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A straw structure for plastic soft packaging comprises a tube unit. A heat sealing unit is arranged below the tube unit. The lower end of the tube unit is detachably connected to the heat sealing unit.

[0009] Furthermore, the tube body unit comprises a nozzle tube body, the lower end of the nozzle tube body is connected to a positioning tube body, the lower end of the positioning tube body is connected to an assembly tube body, and the assembly tube body is assembled with the heat sealing unit.

[0010] Furthermore, the nozzle tube body comprises a tube body, and a plurality of connecting threads are provided on the outer wall of the tube body.

[0011] Furthermore, the positioning tube body includes an inner tube body, the upper end of the inner tube body is connected to the lower end of the suction nozzle tube body, and the lower end is connected to the upper end of the assembly tube body. A plurality of reinforcing flanges are sequentially arranged on the side wall of the inner tube body from top to bottom.

[0012] Furthermore, the reinforcement flange located at the top is a circular flange, and the remaining reinforcement flanges are polygonal flanges.

[0013] Furthermore, the assembly tube body comprises a tube body main body, the upper end of the tube body main body is connected to the positioning tube body, and a plurality of buckle platforms are arranged on the side wall.

[0014] Furthermore, the heat sealing unit comprises a heat sealing seat body, the upper and lower surfaces of the heat sealing seat body are penetrated with connection holes, and the lower end of the tube unit is plug-connected with the connection hole.

[0015] Furthermore, the heat-sealing seat body is in a shuttle shape.

[0016] Furthermore, a plurality of buckling grooves are provided in the connection hole corresponding to the buckling platform, and the buckling platform and the buckling grooves are buckled.

[0017] Furthermore, an annular stop boss is provided on the upper portion of the connecting hole.

[0018] Beneficial effects of the utility model:

[0019] The straw structure for plastic soft packaging provided by the utility model is designed to be a tube unit and a heat-sealing unit that are connected to each other, so that the tube unit has sufficient strength and is not easy to deform. The heat-sealing unit can use a material with a lower melting point according to actual needs, and can solve the problem of unsuccessful heat sealing without reducing the hardness of the tube unit. In addition, the positioning baffle blocks the sealing side of the packaging bag to prevent the bag sealing from exceeding the heat-sealing seat body and causing over-heat sealing. After sealing, the sealing edge at the top of the bag mouth of the packaging bag can be covered to prevent dust and foreign matter from accumulating. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of a straw structure for plastic soft packaging of the utility model;

[0021] Figure 2 It is a cross-sectional view of the straw structure used for plastic soft packaging of the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the pipe unit of the utility model;

[0023] Figure 4 It is a structural schematic diagram of the heat sealing unit of the utility model.

[0024] In the figure: 1-tube unit, 101-nozzle tube, 1011-connecting thread, 102-positioning tube, 1021-reinforcement flange, 103-assembling tube, 1031-snap-on platform, 2-heat sealing unit, 201-heat sealing seat, 202-connecting hole, 2021-connecting hole. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0026] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0027] Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0028] Please refer to Figure 1 and Figure 2, a straw structure for plastic soft packaging provided by the utility model, comprising a tube unit 1, a heat sealing unit 2 is provided below the tube unit 1, and the lower end of the tube unit 1 is detachably connected to the heat sealing unit 2. When in use, the tube unit 1 is arranged above the through hole opened in the packaging bag body, the heat sealing unit 2 is arranged in the bag, and is located below the through hole opened in the packaging bag body, the lower end of the tube unit 1 passes through the through hole opened in the packaging bag body and is connected to the heat sealing unit 2, and the tube unit 1 and the heat sealing unit 2 clamp and fix the edge of the through hole.

[0029] Please refer to Figure 2 and Figure 3 The tube body unit 1 includes a nozzle tube body 101, which is used as the nozzle of the entire package and can be connected to the sealing cover to seal the liquid in the packaging bag. The lower end of the nozzle tube body 101 is connected to a positioning tube body 102, which is mainly used for installation and positioning. The nozzle tube body 101 can be integrally formed with the positioning tube body 102 or connected by buckling or the like, and the present application does not impose any restrictions on this. The lower end of the positioning tube body 102 is connected to an assembly tube body 103, which is used to extend into the interior of the packaging bag and be assembled and connected with the heat sealing unit 2 disposed inside the packaging bag. The positioning tube body 102 and the assembly tube body 103 can be integrally formed or connected by buckling or the like.

[0030] The nozzle tube body 101 includes a tube body, which is a cylindrical tube, and its lower end is connected to the upper end of the positioning tube body 102. A plurality of connecting threads 1011 are provided on the side wall, and the connecting threads 1011 are used to connect with the sealing cover to achieve the closure of the end of the nozzle tube body 1.

[0031] The positioning tube body 102 includes an inner tube body, which is a cylindrical tube body. The upper end of the cylindrical tube is connected to the lower end of the nozzle tube body 101, and the lower end is connected to the upper end of the assembly tube body 103. The connection method can be integrated or buckled. In this embodiment, the connection is integrated. A plurality of reinforcing flanges 1021 are arranged on the side wall of the inner tube body from top to bottom. The number of reinforcing flanges 1021 is at least 2-5. The reinforcing flange 1021 located at the top is a circular flange, and the other reinforcing flanges are polygonal flanges.

[0032] The assembled tube body 103 comprises a tube body, which is a cylindrical tube. The upper end of the cylindrical tube is connected to the positioning tube body 102 , and a plurality of snap-fit ​​platforms 1031 are provided on the side wall. The snap-fit ​​platforms 1031 are used for snap-fitting with the heat sealing unit 2 .

[0033] Please refer to Figures 2 and Figure 4The heat sealing unit 2 includes a heat sealing seat body 201, which is a shuttle-shaped seat body. The upper and lower surfaces of the shuttle-shaped seat body are penetrated with connecting holes 202. The lower end of the tube unit 1 is plug-connected with the connecting hole 202, thereby stably connecting the heat sealing unit 2 and the tube unit 1.

[0034] A plurality of buckle grooves are provided in the connection hole 202 corresponding to the buckle platform 1031, and the buckle platform 1031 is buckled with the buckle grooves to further enhance the stability of the connection. An annular stop boss 2021 is provided on the upper part of the connection hole 2021, and the annular stop boss 2021 blocks the sealing side of the packaging bag to prevent the bag sealing from exceeding the heat sealing seat body 201, causing over-heat sealing, and can also cover the sealing edge of the bag mouth of the packaging bag after sealing to prevent dust and foreign matter from accumulating.

[0035] Working principle:

[0036] When in use, firstly set the tube body unit 1 above the through hole opened in the packaging bag body, set the heat sealing unit 2 in the bag, and be located below the through hole opened in the packaging bag body, and heat seal the edge of the packaging bag at the upper end of the connecting hole 202, and then assemble the lower end of the tube body 103 and insert it through the through hole opened in the packaging bag body to the heat sealing unit 2 for connection, and the tube body unit 1 and the heat sealing unit 2 clamp and fix the edge of the through hole.

[0037] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A straw structure for plastic soft packaging, characterized in that: The invention comprises a tube body unit (1), a heat sealing unit (2) is arranged below the tube body unit (1), the lower end of the tube body unit (1) is detachably connected to the heat sealing unit (2), the heat sealing unit (2) comprises a heat sealing seat body (201), the upper and lower surfaces of the heat sealing seat body (201) are provided with a connecting hole (202), the lower end of the tube body unit (1) is plug-connected to the connecting hole (202), a plurality of connecting grooves are arranged in the connecting hole (202) corresponding to the connecting platform (1031), the connecting platform (1031) is connected to the connecting grooves, and the upper part of the connecting hole (202) is provided with an annular stop boss (2021).

2. The straw structure for plastic soft packaging according to claim 1, characterized in that: The tube body unit (1) comprises a nozzle tube body (101), the lower end of the nozzle tube body (101) is connected to a positioning tube body (102), the lower end of the positioning tube body (102) is connected to an assembly tube body (103), and the assembly tube body (103) is assembled with the heat sealing unit (2).

3. The straw structure for plastic soft packaging according to claim 2, characterized in that: The nozzle tube body (101) comprises a tube body, and a plurality of connecting threads (1011) are provided on the outer wall of the tube body.

4. The straw structure for plastic soft packaging according to claim 2, characterized in that: The positioning tube body (102) comprises an inner tube body, the upper end of the inner tube body is connected to the lower end of the suction nozzle tube body (101), and the lower end is connected to the upper end of the assembly tube body (103), and a plurality of reinforcing flanges (1021) are arranged in sequence on the side wall of the inner tube body from top to bottom.

5. The straw structure for plastic soft packaging according to claim 4, characterized in that: The uppermost reinforcement flange (1021) is a circular flange, and the remaining reinforcement flanges (1021) are polygonal flanges.

6. The straw structure for plastic soft packaging according to claim 2, characterized in that: The assembly tube body (103) comprises a tube body, the upper end of which is connected to the positioning tube body (102), and a plurality of buckling platforms (1031) are provided on the side wall.

7. The straw structure for plastic soft packaging according to claim 1, characterized in that: The heat-sealing seat body (201) is in the shape of a shuttle.

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