The tea cup lid: The "little guardian" of the tea - drinking experience, hiding great details.

1. The tea cup lid, as the "last line of defense" in tea - drinking consumption, seems simple but undertakes multiple missions. It not only needs to achieve sealing and prevent leakage, ensuring that the drink does not spill during transportation and when held in hand, but also needs to be compatible with the straw insertion hole and opening design to make the drinking experience smoother. Some functional cup lids, such as anti - scald and heat - insulating lids, and "DIY lids" with a storage cavity, are constantly innovating in enhancing the fun and practicality of consumption.

2. In terms of materials, most mainstream tea cup lids are made of food - grade PP (polypropylene) material, which has both toughness and temperature resistance. It can remain stable in an environment of - 20°C to 120°C, ensuring the safety of the drink. In terms of structural design, details such as the sealing ring, locking teeth, and easy - tear opening have been repeatedly refined. The sealing ring needs to fit the cup mouth precisely, with the tolerance controlled within 0.1mm to achieve "no leakage when inverted". The locking teeth need to form a mechanical locking between the lid and the cup mouth to prevent the lid from falling off during drinking. The easy - tear opening needs to balance "easy to open" and "prevent accidental opening", and balance the transmission of force through a special incision design. These "millimeter - level" details together form the quality defense line of the tea cup lid, and also make its manufacturing process face strict tests.

Ultrasonic water - cutting: Injecting "precision genes" into the tea cup lid

3. In the production of tea cup lids, the removal of the "water - gate" (the excess material connecting the cup lid and the injection - molding runner) after injection molding is a key link. The introduction of ultrasonic water - cutting technology, with the advantages of "non - contact, high precision, and low damage", has brought a revolutionary breakthrough to cup - lid manufacturing.