Liquid filling bag with seal pollution prevention function

Abstract

The utility model belongs to the field of flexible package composite films, particularly relates to a liquid filling bag with a seal pollution prevention function, and aims to solve the problems that when a bag is filled, a seal is not tight due to the fact that the seal is polluted or leakage occurs due to needle holes and creases caused by the fact that the seal is turned over. The anti-pollution blocking piece is arranged in the bag body after being bent, when the anti-pollution blocking piece is in a bent state, the material injection hole is in a closed state, the edge of the anti-pollution blocking piece is fixedly connected with the inner wall of the bag body, and a crease of the anti-pollution blocking piece after being bent faces the sealed end of the bottom of the bag body. When a client uses the bag for filling, a discharging pipeline opening of equipment can go deep into the bag body through the hole reserved in the anti-fouling blocking piece, when liquid is splashed, the liquid is only splashed to the anti-fouling blocking piece, and the sealing position of the bag body cannot be polluted. Therefore, the problem that the liquid is splashed to the seal can be effectively avoided, and the problem that the seal is not tight is thoroughly solved.

Description

Technical Field

[0001] This utility model belongs to the field of flexible packaging composite film, specifically relating to a liquid filling bag with anti-seal contamination function. Background Technology

[0002] As a manufacturer of composite film packaging bags, we have received numerous complaints from liquid filling customers regarding incomplete bag sealing, a common problem across the industry. Observing the filling process, we've found that many customers experience liquid splashing during filling. When this splashes reach the sealing area, it leads to incomplete sealing and leakage. Some customers, to prevent contamination of the sealing area from liquid splashes, try folding the bag seal outwards. However, this manual folding is unpredictable; pinholes or cracks can easily appear at the fold, causing slow leakage. Leaks may only become apparent some time after packaging, contaminating entire boxes or pallets of goods and requiring extensive reprocessing. To address the issue of incomplete sealing due to contamination or leakage caused by folding the seal, without requiring customers to modify their filling equipment or resolve the liquid splashing problem, we propose a liquid filling bag with anti-seal contamination functionality. Utility Model Content

[0003] The purpose of this utility model patent is to solve the problem that during bag filling, the seal may be contaminated, resulting in poor sealing or leakage due to pinholes and creases at the seal. This utility model provides a liquid filling bag with anti-contamination function at the seal.

[0004] The purpose of this utility model is achieved as follows: a liquid filling bag with anti-seal contamination function, which includes a bag body and an anti-contamination baffle;

[0005] The anti-pollution baffle has a filling hole in the middle. After being bent, the anti-pollution baffle is placed inside the bag body. When the anti-pollution baffle is bent, the filling hole is closed. The edge of the anti-pollution baffle is fixedly connected to the inner wall of the bag body. The crease of the anti-pollution baffle after bending faces the bottom sealing end of the bag body.

[0006] Furthermore, the anti-pollution baffle is installed inside the bag, 2-4 cm away from the opening of the bag.

[0007] Furthermore, the anti-pollution baffle has a 5-8mm wide connection between its two sides and the bag body after being folded in half.

[0008] Furthermore, the two sides of the anti-pollution baffle after being folded are connected to the bag body by heat fusion.

[0009] Furthermore, the bag body is made of BOPA and polyethylene bonded together with an adhesive.

[0010] Furthermore, the bag body is integrally formed from nylon chips and polyethylene granules using a multi-layer co-extrusion machine.

[0011] Furthermore, the melting point of the anti-pollution baffle is 15-20°C lower than that of the polyethylene used in the bag body.

[0012] Furthermore, the anti-pollution baffle is a baffle formed by co-extrusion of at least three layers.

[0013] Furthermore, the anti-pollution baffle is a five-layer co-extruded baffle.

[0014] Furthermore, the first and fifth layers of the anti-pollution baffle are made of plasmon, the second and fourth layers are made of low-density polyethylene and metallocene polyethylene, and the third layer is made of high-density polyethylene and low-density polyethylene.

[0015] Beneficial effects:

[0016] By installing anti-contamination baffles with appropriate injection holes, when customers use bags for filling, the equipment's discharge pipe will penetrate into the bag body through the injection holes in the anti-contamination baffles. When liquid splashes, it will only hit the anti-contamination baffles, preventing contamination of the bag's seal. This effectively avoids liquid splashing onto the seal, completely solving the problem of incomplete sealing. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a liquid filling bag with anti-seal contamination function according to the present invention;

[0018] Figure 2 This is a top view of the bag body after the opening of this utility model is opened;

[0019] Figure 3 This is a schematic diagram of the unfolded anti-pollution baffle of this utility model.

[0020] Figure 4 This is a schematic diagram of the anti-pollution baffle of this utility model when folded in half. Detailed Implementation

[0021] Specific Implementation Method 1: A liquid filling bag with anti-seal contamination function, which includes a bag body 1 and an anti-contamination baffle 2;

[0022] The anti-pollution baffle 2 has an injection hole 3 in the middle. After being bent, the anti-pollution baffle 2 is placed inside the bag body 1. When the anti-pollution baffle 2 is bent, the injection hole 3 is closed. The edge of the anti-pollution baffle 2 is fixedly connected to the inner wall of the bag body 1. The crease of the anti-pollution baffle 2 after bending faces the bottom sealing end of the bag body 1.

[0023] In this embodiment: The solution consists of a bag and an anti-contamination baffle. The anti-contamination baffle has a filling hole in the center, slightly larger than the diameter of the filling port of the customer's equipment, to facilitate material discharge.

[0024] Specific implementation method 2: A liquid filling bag with anti-seal contamination function, wherein the anti-contamination baffle 2 is set inside the bag body 1 at a distance of 2-4cm from the opening end of the bag body 1.

[0025] Other implementation methods are the same as those in Specific Implementation Method 1.

[0026] Specific implementation method 3: A liquid filling bag with anti-sealing contamination function, wherein the anti-contamination baffle 2 is 5-8mm wide on both sides after being folded and connected to the bag body 1.

[0027] In this embodiment: the two sides of the anti-pollution baffle after being folded are used to connect with the bag body, dividing the bag body into upper and lower areas, with the lower area used for material feeding.

[0028] Other implementation methods are the same as those in Specific Implementation Method 1.

[0029] Specific implementation method four: A liquid filling bag with anti-sealing contamination function, wherein the two sides of the anti-contamination baffle 2 after being folded are connected to the bag body 1 by heat fusion.

[0030] Other implementation methods are the same as those in Specific Implementation Method 1.

[0031] Specific Implementation Method 5: A liquid filling bag with anti-sealing contamination function, wherein the bag body 1 is made of BOPA and polyethylene by adhesive bonding.

[0032] Other implementation methods are the same as those in Specific Implementation Method Four.

[0033] Specific Implementation Method Six: A liquid filling bag with anti-sealing contamination function, wherein the bag body 1 is integrally formed from nylon chips and polyethylene granules through a multi-layer co-extrusion device.

[0034] Other implementation methods are the same as those in Specific Implementation Method 5.

[0035] Specific Implementation Method Seven: A liquid filling bag with anti-seal contamination function, wherein the melting point of the anti-contamination baffle 2 is 15-20°C lower than the melting point of the polyethylene used in the bag body 1.

[0036] In this embodiment: both sides of the anti-pollution baffle must have good heat-melting properties with the PE (polyethylene) used in the bag body, and its melting point must be 15-20°C lower than that of the polyethylene used in the bag body. Because the anti-pollution baffle is placed inside the bag body after being folded, it is thicker than other sealing positions of the bag. Therefore, the anti-pollution baffle needs to have a lower melting point to ensure that the bag body, the anti-pollution baffle, and the two opposite sides of the anti-pollution baffle after being folded are well heat-melted together. Furthermore, the anti-pollution baffle must have good rigidity to ensure that when the bag opening is opened and then closed, the anti-pollution baffle can fold back along the crease.

[0037] Other implementation methods are the same as those in Specific Implementation Method Six.

[0038] Specific implementation method eight: A liquid filling bag with anti-seal contamination function, wherein the anti-contamination baffle 2 is a baffle formed by at least three layers of co-extrusion.

[0039] Other implementation methods are the same as those in specific implementation method nine.

[0040] Specific implementation method nine: A liquid filling bag with anti-sealing contamination function, wherein the anti-contamination baffle 2 is a five-layer co-extruded baffle.

[0041] Other implementation methods are the same as those in Specific Implementation Method 8.

[0042] Specific Embodiment 10: A liquid filling bag with anti-sealing contamination function, wherein the first and fifth layers of the anti-contamination baffle 2 are both made of plastic body, the second and fourth layers of the anti-contamination baffle 2 are made of low-density polyethylene and metallocene polyethylene, and the third layer of the anti-contamination baffle 2 is made of high-density polyethylene and low-density polyethylene.

[0043] In this embodiment: the first and fifth layers use 50% (wt%) of Daelim Plastomer VL0001 from South Korea and Plastomer 1881G from Dow Chemical. The second and fourth layers use 40 wt% (wt%) (LDPE 2426H) (LDPE 2426H) (LDPE 2426H) (LDPE 2426H) (LDPE 2426H) (LDPE 2420 ...

[0044] Other implementation methods are the same as those in specific implementation method nine.

Claims

1. A liquid filling bag with anti-contamination function at the sealing point, characterized in that: It includes a bag body (1) and a pollution-proof baffle (2); The anti-pollution baffle (2) has an injection hole (3) in the middle. After the anti-pollution baffle (2) is bent, it is placed inside the bag body (1). When the anti-pollution baffle (2) is bent, the injection hole (3) is closed. The edge of the anti-pollution baffle (2) is fixedly connected to the inner wall of the bag body (1). The crease of the anti-pollution baffle (2) after bending faces the bottom sealing end of the bag body (1).

2. A liquid filling bag with anti-seal contamination function according to claim 1, characterized in that: The anti-pollution baffle (2) is placed inside the bag body (1) at a distance of 2-4 cm from the opening end of the bag body (1).

3. A liquid filling bag with anti-seal contamination function according to claim 1, characterized in that: The anti-pollution baffle (2) has a width of 5-8mm on both sides after being folded and is connected to the bag body (1).

4. A liquid filling bag with anti-seal contamination function according to claim 1, characterized in that: The two sides of the anti-pollution baffle (2) after being folded are connected to the bag body (1) by heat fusion.

5. A liquid filling bag with anti-seal contamination function according to claim 4, characterized in that: The bag body (1) is made of BOPA and polyethylene by adhesive bonding.

6. A liquid filling bag with anti-seal contamination function according to claim 5, characterized in that: The bag body (1) is made of nylon chips and polyethylene granules through multi-layer co-extrusion equipment.

7. A liquid filling bag with anti-seal contamination function according to claim 6, characterized in that: The melting point of the anti-pollution baffle (2) is 15-20°C lower than that of the polyethylene used in the bag body (1).

8. A liquid filling bag with anti-seal contamination function according to claim 1, characterized in that: The anti-pollution baffle (2) is a baffle formed by co-extrusion of at least three layers.

9. A liquid filling bag with anti-seal contamination function according to claim 8, characterized in that: The anti-pollution baffle (2) is a five-layer co-extruded baffle.

10. A liquid filling bag with anti-seal contamination function according to claim 9, characterized in that: The first and fifth layers of the anti-pollution baffle (2) are made of plastic, the second and fourth layers of the anti-pollution baffle (2) are made of low-density polyethylene and metallocene polyethylene, and the third layer of the anti-pollution baffle (2) is made of high-density polyethylene and low-density polyethylene.

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