Ningbo Sunwinjer Daily Products Co,.LTD
Ningbo Sunwinjer Daily Products Co,.LTD
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A plastic flip cap is a type of dispensing closure made primarily from plastic, featuring a hinged lid that "flips" open to allow product dispensing and snaps shut to create a seal. It is one of the most popular and user-friendly closures globally, designed for convenience and one-handed operation.
The key components are almost always made of plastic:
Hinged Lid: Made from a flexible plastic like Polypropylene (PP).
Base Skirt: Made from a stiffer plastic like Polyethylene (PE) or PP.
Hinge: A "living hinge," which is a thin, flexible section of plastic molded as part of the lid.
The mechanism relies on the flexibility of the plastic living hinge:
Opening: The user applies pressure to the front of the lid or a small lever. The plastic living hinge flexes, pivoting the lid upward and away from the orifice.
Dispensing: With the lid open, the user squeezes the bottle or turns it upside down to dispense the product through the now-exposed opening.
Closing: The user presses the lid down. The hinge flexes again, and a plug seal on the underside of the lid snaps into the orifice, creating a leak-resistant closure. The "snap" provides tactile and auditory feedback that the cap is securely closed.