一种具有单向阀的防逆流包装袋
By incorporating a one-way valve in the spout base, the risk of reverse seepage of external contaminants into bagged beverages is eliminated, achieving one-way outflow of liquid and internal hygiene and safety, making it suitable for food and beverage packaging with high hygiene requirements.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- PACKTOP LAMINATED PACKING CO LTD
- Filing Date
- 2025-08-02
- Publication Date
- 2026-07-17
AI Technical Summary
The existing spout design of bagged beverages poses a risk of reverse seepage of external contaminants, resulting in hygiene hazards, especially threatening the health of infants, the elderly, or people with weakened immune systems.
A one-way valve is installed in the nozzle base. The one-way valve is made of soft and deformable material to block the reverse entry of external gases, microorganisms and particles, ensuring that the liquid flows out in one direction.
It effectively blocks external contaminants from entering, ensuring the quality and hygiene safety of the liquid inside the bag, and is suitable for food and beverage packaging with high hygiene requirements.
Smart Images
Figure CN224511946U_ABST
Abstract
Claims
1. An anti-reflux packaging bag having a one-way valve, characterized by, Includes a nozzle base (1), which is fixedly connected to the open end of the flexible packaging bag (4), and a one-way valve (2) is provided in the fluid channel of the nozzle base (1). When a negative pressure environment is formed inside the flexible packaging bag (4), the one-way valve (2) allows the liquid inside the bag to flow out unidirectionally to the outside of the nozzle base (1); The one-way valve (2) prevents external gases, microorganisms and particulate matter from entering the packaging bag (4) in reverse. The suction nozzle base (1) is a three-section integrated molding structure, including a middle section (101), with a connecting section (102) and a threaded section (103) fixed to both ends of the middle section (101); the middle section (101) is an axially reinforced structure, and the outer wall is provided with anti-slip reinforcing ribs to enhance grip stability; The connecting section (102) is fixed to the open end of the packaging bag body (4) by hot melt welding or ultrasonic bonding. The threaded section (103) has threads on its outer wall for screwing on the cap (3) and forming a sealing interface.
2. The anti-reflux packaging bag with a one-way valve according to claim 1, characterized in that, The one-way valve (2) is made of a soft, deformable material.
3. The anti-reflux packaging bag with a one-way valve according to claim 2, characterized in that, The one-way valve (2) includes a valve body (201), which is cylindrical in shape and is coaxially arranged with the fluid channel of the suction nozzle base (1) in its axial direction. The valve body (201) has two symmetrically arranged inclined surfaces at one end, and a linear liquid passage slit (203) is provided at the intersection of the two inclined surfaces. The liquid passage slit (203) expands elastically under negative pressure to allow liquid to pass through, and returns to the closed state after the pressure is removed.
4. The anti-reflux packaging bag with a one-way valve according to claim 3, characterized in that, The valve body (201) is provided with an end block (202) at one end away from the liquid passage (203). The outer diameter of the end block (202) is larger than the inner diameter of the fluid channel of the nozzle base (1). After the valve body (201) is inserted into the nozzle base (1), the end block (202) is outside the nozzle base (1).
5. The anti-reflux packaging bag with a one-way valve according to claim 1, characterized in that, The connecting segment (102) includes a central circular hole (1021), and narrowing edges (1022) are provided diffracted outward from the central circular hole (1021) on both sides. When viewed from the interface of the connecting segment (102), the narrowing edge (1022) is larger in size closer to the central circular hole (1021), and the two sides of the narrowing edge (1022) at the position furthest from the central circular hole (1021) overlap to form a self-closing side seam.
6. The anti-reflux packaging bag with a one-way valve according to claim 5, characterized in that, The inner wall of the cap (3) is provided with a conical sealing ring (301) with a cone angle of 30° to 45°, which forms a double sealing interface after being pressed against the end face of the threaded section (103).
7. The anti-reflux packaging bag with a one-way valve according to any one of claims 1 to 6, characterized in that, The packaging bag body (4) is a multi-layer composite structure, which includes, from the inside to the outside: a food-grade polyethylene inner layer, an aluminum foil barrier layer, and a polyester outer layer; The bottom of the bag (4) is provided with a self-supporting reinforcing rib with a W-shaped cross section, so that the bag can be placed upright when filled with liquid.