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The 4L Flat-bottomed barrel is a space-saving packaging solution designed for efficient storage and handling. It is typically made from high-density polyethylene (HDPE) using blow molding or injection molding processes.
Working Principle
- Containment and Storage: Its core function is to safely contain 4 liters of liquid, paste or powdery materials.
- Sealing and Isolation: A reliable sealing system is formed through the precise cooperation between the barrel lid and the inner plug, ensuring the quality and stability of the contents.
- Stacking and Load-bearing: The flat and square design allows multiple empty barrels to be nested into each other, and the filled barrels can be stacked flat, thereby greatly saving storage and transportation space.
- Pouring and Taking: The special design of the bottle mouth and barrel body facilitates pouring.

Features
The key features of 4L Flat-bottomed barrel are its "flat" and "square" design:
- The square shape allows for efficient space utilization during stacking and transportation
- The flat profile makes it easier to handle, grip, and carry
- This combination of design and material makes it a practical choice for various liquid packaging applications.
Structure
The 4L Flat-bottomed barrel has a compact design, mainly composed of the following parts:
- Body: The overall shape is a flat cube or cuboid.
- Mouth: Located at the top of the container, usually offset to one side for easy pouring without a "gurgling" effect.
- Handle: One type is an ear-like attachment on either side of the container shoulder, allowing for horizontal laying and flexible use. Another type is a flat handle integrally molded with the container body, which is sturdy and space-saving.
- Lid Sealing System: To ensure a tight seal, a double-layer sealing structure is typically used. The inner layer is an inner plug that screws into the inner wall of the container opening to achieve the first layer of sealing; the outer layer is an outer cap (usually with an anti-theft tear-off ring).
Detailed Information
|
Length |
Width |
Height |
Mouth Diameter |
|
170±10mm |
120±10mm |
280±10mm |
32.8mm |
Application
Due to its excellent versatility and safety, the 4L Flat-bottomed barrel is widely used in the following industries:
- Petrochemical Industry
- Food Industry
- Pharmaceuticals and Laboratories
- Disinfection and Cleaning Products
- Hardware and Industrial Products
- Agriculture and Animal Husbandry
- Daily Life and Leisure
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