48mm Smart Cap

(In Accordance with china GB/T17876-2010 National Standard)

In modern households, offices, and various commercial scenarios, barreled water has long been a core choice for convenient drinking water. The key accessory ensuring the sealing safety and ease of use of barreled water is the 48mm smart cap (48mm tamper-evident top-piercing cap). Also known as the 48mm smart cap, it is produced in strict compliance with the national standard GB/T17876-2010 "Packaging Containers - Plastic Tamper-Evident Closures". Specifically designed for 3-5 gallon (approximately 11.3-18.9L) barreled water, it is the perfect companion for large-caliber bottlenecks. The sealing structure at its center can be easily pierced by the column of the water dispenser's smart seat, and combined with the ingenious design of the tamper-evident band, it not only achieves the convenience of automatic water outflow but also meets the anti-theft and anti-counterfeiting requirements of the national standard that "the original packaging cannot be restored after opening". Thus, it has become an indispensable standardized component in the barreled water industry.

I. Definition Analysis and Core Advantages (Refer to GB 3.1-3.4)

1. Core Definition of the National Standard

The 48mm smart cap (48mm tamper-evident top-piercing cap) fully conforms to the definition of "plastic tamper-evident closure" in GB/T17876-2010: it uses polyolefin as the core raw material, is processed and formed by injection molding or compression molding process, cannot be restored to its original packaging state once sealed and opened, and has two core attributes of sealing and anti-theft, with a precise specification of 48mm.

2. Core Functional Highlights

More Reliable Sealing and Leakage Prevention: Adopting a double-plug (inner and outer) sealing design, it strictly meets the national standard's sealing performance indicators. It can effectively prevent water leakage or contamination of barreled water during transportation and storage, perfectly adapting to the long-term storage needs of barreled water.

Automatic Water Outflow Without Manual Operation: The center of the cap is equipped with a top-piercing sheet connected by thin ribs. With the weight of the barreled water itself (12-20kg), the column of the water dispenser's smart seat can easily pierce the sealing sheet, realizing automatic water outflow without manual operation, which is very convenient to use.

Guaranteed Anti-theft and Anti-counterfeiting: As one of the core advantages of the 48mm tamper-evident top-piercing cap, the tamper-evident band is connected to the cap body by connecting bridges (clearly defined in GB 3.4). When opened for the first time, the connecting bridges will break, leaving irreversible opening marks, fundamentally avoiding secondary packaging.

Hygienic and Safe Without Hidden Dangers: Made of food-grade polyolefin material, it fully meets the national standard's hygienic performance requirements. With a disposable design, it completely eliminates the possibility of cross-contamination, making drinking water safer.

Strong Standardized Adaptability: The precise 48mm caliber can perfectly match the corresponding standard bottleneck, and is compatible with mainstream commercial and household water dispenser smart seats on the market. It also meets the flexible requirement of "specifications can be determined through negotiation between supply and demand parties" in the national standard, with wide adaptability.

II. Product Classification and Key Specifications (Refer to GB 4.1-4.2)

1. Product Classification Dimensions

From the perspective of cap structure: Without gasket (the top-piercing sheet itself has a sealing function);

Divided by manufacturing process: Including compression-molded caps and injection-molded caps, which are also the core production processes currently;

Distinguished by purpose: Belongs to non-carbonated beverage caps, specifically adapted to barreled drinking water, which is significantly different from carbonated beverage caps that need to adapt to high-pressure environments.

2. Core Specifications and Tolerance Requirements (Refer to GB 5.2)

The core dimensions and tolerances of the 48mm smart cap fully comply with the provisions of Table 2 in GB/T17876-2010 for the 40-50mm size range. The specific details are as follows:

Note: In addition to the above standard dimensions, other personalized dimension requirements can be determined through negotiation between supply and demand parties in accordance with the requirements of GB 4.2.

III. Structural Design and Working Logic

1. Core Structural Composition (In line with GB 3.4 and 5.1 requirements)

2. Practical Working Principle

Place the barreled water with the 48mm tamper-evident top-piercing cap upside down on the smart seat of the water dispenser;

The weight of the barreled water itself is transmitted to the central column of the smart seat, exerting vertical pressure on the lever point of the top-piercing sheet;

When the pressure reaches approximately 20-35N, the thin ribs of the top-piercing sheet will break, and the flaps will open outward to form a water outlet;

The barreled water flows into the inner tank of the water dispenser through the guide groove of the smart seat, thereby realizing automatic water supply;

At the same time, the tamper-evident band will separate from the clamping groove of the bottleneck, and the connecting bridges will break, forming irreversible opening marks, which fully complies with the national standard definition of "cannot be restored to the original packaging after opening".

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