Casting polypropylene food packaging bag with double-opening structure

Abstract

The utility model provides a casting polypropylene food packaging bag with a double-opening structure, which comprises a pair of base material membranes, after the base material membranes are mutually buckled, the edges of the base material membranes are mutually jointed to form an adapter ring edge, a packaging space capable of placing food is enclosed between the base material membranes, a short-distance tearing opening and a long-distance tearing opening are formed in the adapter ring edge, and the short-distance tearing opening and the long-distance tearing opening are connected with the adapter ring edge. The short-distance tearing opening is located at one end of the adapter ring edge, the adapter ring edge and the base material membrane can be torn at the short-distance tearing opening, the long-distance tearing opening is located at the other end of the adapter ring edge, and the adapter ring edge and the base material membrane can be torn at the long-distance tearing opening. According to the packaging bag, the short-distance tearing opening and the long-distance tearing opening are matched with the short-distance nick and the long-distance nick correspondingly, the function of taking and using small-batch food and large-batch food is achieved, the short-distance nick is of an arc-shaped structure to increase the size of a short-diameter opening, the long-distance nick is combined with an arc-shaped section and a linear section to form a flow guide wedge angle, the tearing path and the food leading-out efficiency are jointly optimized, and the packaging bag is convenient to use. And the operation convenience and the structural stability are taken into account while different taking requirements are met.

Description

Technical Field

[0001] This utility model relates to packaging products, and more particularly to a cast polypropylene food packaging bag with a double-opening structure. Background Technology

[0002] Patent document CN201161764Y discloses a packaging bag with an easy-tear opening, consisting of a bag body, a storage cavity, and an easy-tear opening. The easy-tear opening is formed on the sealed edge of the bag body, and is notched in shape, located on one side or symmetrically on both sides of the sealed edge. The easy-tear opening is relatively large and easy for users to identify, especially in low-light conditions or when the user's eyesight is poor. Users can find the location of the easy-tear opening by touch. Moreover, manufacturers can install it on existing horizontal and vertical packaging machines without purchasing new equipment. Its structure is simple, low-cost, easy to process, and convenient to unpack, making it widely applicable to the outer packaging of products, food, pharmaceuticals, or hygiene products. However, the easy-tear opening of this conventional packaging bag is inconvenient to use, the resulting opening shape is irregular, and it is difficult to control. Therefore, it is necessary to optimize its structure to overcome the above-mentioned defects. Utility Model Content

[0003] The purpose of this invention is to provide a cast polypropylene food packaging bag with a double-opening structure.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] A cast polypropylene food packaging bag with a double-opening structure includes a pair of substrate films. The substrate films are interlocked, and their edges are joined together to form a transition loop. This interlocking structure creates a packaging space between the substrate films for placing food.

[0006] A short tear is provided in the edge of the adapter ring. The short tear is located at one end of the edge of the adapter ring, which can tear the edge of the adapter ring and the substrate film.

[0007] The adapter ring edge is also provided with a long tear, which is located at the other end of the adapter ring edge. The adapter ring edge and the substrate film can be torn at the long tear.

[0008] In one embodiment of this utility model, the substrate film is further provided with short-distance grooves, which are connected to short-distance tear openings and extend towards the end of the adapter ring near the short-distance grooves. After the adapter ring is torn at the short-distance tear opening, the tear path extends along the short-distance grooves, forming a short-diameter opening at the edge of the substrate film. The packaging space is connected to the outside through the short-distance opening, and the food in the packaging space can be taken out in small batches from the short-diameter opening.

[0009] In one embodiment of this utility model, the substrate film is further provided with long-distance grooves, which are connected to long-distance tear openings. The long-distance grooves extend towards the end of the adapter ring near the short-distance grooves and penetrate both ends of the substrate film. After the adapter ring is torn at the long-distance tear opening, the tear path extends along the long-distance grooves, forming a long-diameter opening at the edge of the substrate film. The packaging space is connected to the outside through the long-distance opening, and the food in the packaging space can be taken out in large quantities from the long-diameter opening.

[0010] In one embodiment of this utility model, the short-distance tear is located at the top of the adapter ring edge, and the short-distance groove is an arc-shaped structure. Its top is connected to the short-distance tear, and its bottom is obliquely inserted into the substrate film at a downward angle to the short-distance tear and extends to the side of the adapter ring edge, so that the size of the short-diameter opening is larger, thereby improving the efficiency of food removal.

[0011] In one embodiment of this utility model, the long-distance tear is located at the top of the adapter ring edge. The long-distance groove has an arc-shaped segment, the top of which connects with the long-distance tear, and the bottom of which deviates obliquely downward into the substrate film. The long-distance groove also has a straight segment, one end of which connects with the bottom of the arc-shaped segment, and the other end of which penetrates the substrate film and extends towards the short-distance tear, and extends to the side of the adapter ring edge, so that the long-diameter opening penetrates through both ends of the substrate film and forms a guide wedge at the arc-shaped segment to improve the efficiency of food removal.

[0012] In one embodiment of this utility model, the ends of the short-distance and long-distance grooves are located at the same position on the side of the adapter ring.

[0013] In one embodiment of the present invention, the edge of the substrate film is provided with a holding section, which is recessed into the substrate film. The edge of the transition ring is also recessed inward at the holding section, which facilitates the holding operation of the packaging bag.

[0014] In one embodiment of this utility model, a clamping wing is provided on the side of the adapter ring. The clamping wing is away from the short tear and close to the long tear. It protrudes outward from the side of the adapter ring. The packaging bag can be positioned by the clamping wing and the tearing operation can be performed at the long tear.

[0015] In one embodiment of this utility model, each substrate film has a heat-sealing inner layer, which is made of cast polypropylene film. A barrier middle layer is attached to the outer wall of the heat-sealing inner layer. The barrier middle layer is made of ethylene-vinyl alcohol copolymer film. A protective outer layer is attached to the outer wall of the barrier middle layer. The protective outer layer is made of biaxially oriented polypropylene film.

[0016] The advantages of this utility model are:

[0017] This packaging bag utilizes a combination of short-distance and long-distance tear holes, along with short-distance and long-distance etchants, to facilitate convenient small-batch and large-batch food dispensing. The short-distance etchants employ an arc-shaped structure to increase the short-diameter opening size, while the long-distance etchants combine arc-shaped and straight segments to form a guide wedge angle. Together, they optimize the tear path and food dispensing efficiency. Furthermore, the concave design of the grip section enhances holding comfort, ensuring that the packaging bag meets diverse dispensing needs while maintaining operational convenience and structural stability. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the cast polypropylene food packaging bag with a double-opening structure proposed in this utility model;

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of the substrate film;

[0020] Figure 3 This is a schematic diagram showing the state of the packaging bag after it has been torn along the short-distance notch, forming a short-diameter opening;

[0021] Figure 4 This is a schematic diagram showing the state of the packaging bag after it has been torn along the long-distance notch, resulting in an opening along the long axis. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0023] like Figures 1-4 As shown, the cast polypropylene food packaging bag with a double-opening structure proposed in this utility model includes a pair of substrate films 100. After the substrate films are fastened together, their edges are joined together to form a transition ring edge 200, and a packaging space for placing food is formed between the substrate films.

[0024] A short tear 210 is provided in the edge of the adapter ring. The short tear 210 is located at one end of the edge of the adapter ring, and the edge of the adapter ring and the substrate film can be torn at the short tear 210.

[0025] The adapter ring edge is also provided with a long tear 220, which is located at the other end of the adapter ring edge, and the adapter ring edge and the substrate film can be torn at the long tear 220.

[0026] In this embodiment, the substrate film is further provided with short-distance notches 110, which are connected to short-distance tear openings and extend towards the end of the adapter ring near the short-distance notches. After the adapter ring is torn at the short-distance tear opening, the tear path extends along the short-distance notches, forming a short-diameter opening at the edge of the substrate film. The packaging space is connected to the outside through the short-distance opening, and the food in the packaging space can be taken out in small batches from the short-diameter opening.

[0027] In this embodiment, the substrate film is also provided with long-distance slits 120, which are connected to long-distance tear openings. The long-distance slits extend towards the end of the adapter ring near the short-distance slits and penetrate both ends of the substrate film. After the adapter ring is torn at the long-distance tear opening, the tear path extends along the long-distance slits, forming a long-diameter opening at the edge of the substrate film. The packaging space is connected to the outside through the long-distance opening, and the food in the packaging space can be taken out in large quantities from the long-diameter opening.

[0028] In this embodiment, the short-pitch tear is located at the top of the adapter ring edge. The short-pitch groove is an arc-shaped structure. Its top is connected to the short-pitch tear, and its bottom is obliquely inserted into the substrate film at a downward angle to the short-pitch tear and extends to the side of the adapter ring edge, so that the size of the short-diameter opening is larger to improve the efficiency of food removal.

[0029] In this embodiment, the long-distance tear is located at the top of the adapter ring edge. The long-distance groove has an arc-shaped segment 121, the top of which is connected to the long-distance tear, and the bottom of which is obliquely inserted into the substrate film at the bottom of the long-distance tear. The long-distance groove also has a straight segment 122, one end of which is connected to the bottom of the arc-shaped segment, and the other end of which penetrates the substrate film and extends towards the short-distance tear and extends to the side of the adapter ring edge, so that the long diameter opening penetrates through both ends of the substrate film and forms a guide wedge at the arc-shaped segment to improve the efficiency of food removal.

[0030] In this embodiment, the ends of the short-distance and long-distance grooves are located at the same position on the side of the adapter ring.

[0031] In this embodiment, the edge of the substrate film is provided with a holding section 130, which is recessed into the substrate film. The edge of the transition ring is also recessed inward at the holding section, which facilitates the holding operation of the packaging bag.

[0032] In this embodiment, a clamping wing 230 is provided on the side of the adapter ring. This clamping wing is away from the short-distance tear and close to the long-distance tear. It protrudes outward from the side of the adapter ring and can clamp and position the packaging bag, and perform the tearing operation at the long-distance tear. The clamping wing can also form a protrusion by inflating it or opening a through hole to make the clamping and positioning state more stable.

[0033] In this embodiment, each substrate film has a heat-sealing inner layer 101, which is made of cast polypropylene film. A barrier middle layer 102 is bonded to the outer wall of the heat-sealing inner layer. The barrier middle layer is made of ethylene-vinyl alcohol copolymer film. A protective outer layer 103 is bonded to the outer wall of the barrier middle layer. The protective outer layer is made of biaxially oriented polypropylene film. Simultaneously, short-distance and long-distance indentations are respectively formed in the barrier middle layer. These are created by laser scribing to locally weaken the barrier middle layer material, without penetrating the barrier middle layer, thus avoiding the formation of air leakage points.

[0034] In the description of this utility model, it should be noted that when terms such as "upper," "lower," "inner," "outer," "left," and "right" appear to indicate orientation or positional relationships, they should be understood as being based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships commonly used when the product of this utility model is in use, or the orientation or positional relationships commonly understood by those skilled in the art. These terms are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, when terms such as "first" and "second" appear, they are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, it should also be noted that unless otherwise explicitly specified and limited, terms such as "installation," "setting," and "connection" should be interpreted broadly. For example, "connection" 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; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

Claims

1. A cast polypropylene food packaging bag with a double-opening structure, comprising a pair of substrate films, wherein the edges of the substrate films are interlocked after being fastened together to form a transition ring, and a packaging space for placing food is formed between the substrate films, characterized in that: A short tear is provided in the edge of the adapter ring. The short tear is located at one end of the edge of the adapter ring, which can tear the edge of the adapter ring and the substrate film. The adapter ring edge is also provided with a long tear, which is located at the other end of the adapter ring edge. The adapter ring edge and the substrate film can be torn at the long tear.

2. The cast polypropylene food packaging bag with a double-opening structure according to claim 1, characterized in that: The substrate film also has short-distance notches, which connect with short-distance tear openings and extend towards the end of the adapter ring near the short-distance notches. After the adapter ring is torn at the short-distance tear opening, the tear path extends along the short-distance notches, forming a short-diameter opening at the edge of the substrate film. The packaging space is connected to the outside through the short-distance opening, and the food in the packaging space can be taken out in small batches from the short-diameter opening.

3. A cast polypropylene food packaging bag with a double-opening structure according to claim 1, characterized in that: The substrate film also has long-distance slits that connect with long-distance tear openings. These slits extend towards the end of the adapter ring near the short-distance slits and penetrate both ends of the substrate film. After the adapter ring is torn at the long-distance tear opening, the tear path extends along the long-distance slits, forming a long-diameter opening at the edge of the substrate film. The packaging space is connected to the outside through the long-distance opening, and the food inside the packaging space can be taken out in large quantities from the long-diameter opening.

4. A cast polypropylene food packaging bag with a double-opening structure according to claim 2, characterized in that: The short-pitch tear is located at the top of the adapter ring. The short-pitch groove has an arc-shaped structure. Its top connects with the short-pitch tear, and its bottom is inclined downwards into the substrate film and extends to the side of the adapter ring, making the size of the short-diameter opening larger to improve the efficiency of food removal.

5. A cast polypropylene food packaging bag with a double-opening structure according to claim 1, characterized in that: The long-distance tear is located at the top of the adapter ring. The long-distance groove has an arc-shaped segment whose top connects with the long-distance tear and whose bottom deflects obliquely downward into the substrate film. The long-distance groove also has a straight segment, one end of which connects with the bottom of the arc-shaped segment and the other end of which penetrates the substrate film and extends towards the short-distance tear, reaching the side of the adapter ring. This allows the long-diameter opening to penetrate both ends of the substrate film and form a guide wedge at the arc-shaped segment to improve the efficiency of food removal.

6. A cast polypropylene food packaging bag with a double-opening structure according to claim 2 or 3, characterized in that: The ends of the short-distance and long-distance grooves are located at the same position on the side of the adapter ring.

7. A cast polypropylene food packaging bag with a double-opening structure according to claim 1, characterized in that: The substrate film has a gripping section on its edge, which is recessed into the substrate film. The connecting ring edge is also recessed inward at the gripping section, making it easy to hold the packaging bag.

8. A cast polypropylene food packaging bag with a double-opening structure according to claim 1, characterized in that: The side of the adapter ring is provided with a clamping wing. The clamping wing is away from the short tear and close to the long tear. It protrudes outward from the side of the adapter ring. The packaging bag can be positioned by the clamping wing and the tearing operation can be performed at the long tear.

9. A cast polypropylene food packaging bag with a double-opening structure according to claim 2 or 3, characterized in that: Each substrate film has a heat-sealing inner layer made of cast polypropylene film. A barrier middle layer is attached to the outer wall of the heat-sealing inner layer. The barrier middle layer is made of ethylene-vinyl alcohol copolymer film. A protective outer layer is attached to the outer wall of the barrier middle layer. The protective outer layer is made of biaxially oriented polypropylene film. Short-distance and long-distance grooves are respectively formed in the barrier middle layer.

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