Rubber Check Valve for Cosmetic Bottle Cap

Product Features

1. Shape Characteristics:The whole product is made of translucent silicone material. It looks almost like a cylinder. Inside it, there’s a protruding structure that’s shaped like a duckbill. This duckbill-shaped protrusion is its key feature. It uses the flexibility of silicone to get a unique opening and closing function.

This structural design matches the precision requirements of Medical Grade Silicone Seals and Beauty Equipment Gaskets. It makes sure the valve works reliably, and also fits the small design of aesthetic medical cosmetic cases.

 

2.Function:As a one-way valve for aesthetic medical cosmetic cases, the duckbill-shaped protrusion works like this: it uses the elasticity of its silicone material. When there’s positive liquid pressure (like when you squeeze the cosmetic case to make the liquid inside flow out), the duckbill opens. This lets the liquid pass through. When the pressure goes away, or when there’s reverse pressure (like when external liquid tries to flow back in), the duckbill closes because of its elasticity. This blocks the backflow.This controls the one-way flow of liquid exactly. It makes sure the liquid in the cosmetic case can be squeezed out when needed. At the same time, it stops external things from making the product dirty and the internal liquid from leaking. So it keeps the product clean and easy to use. Its reliable function is as good as that of Medical Device Seals. And it meets the strict safety standards of Aesthetic Machine Components.

 

3. Required Characteristics

1)Material Properties:It’s made of food-grade and medical-grade silicone. This silicone is non-toxic and harmless. When it touches aesthetic medical cosmetics (like serums, lotions), it won’t have chemical reactions. This makes sure the products are safe.At the same time, the silicone must have just the right flexibility and elasticity. It can open and close many times without changing shape. This makes sure the one-way valve works stably for a long time. This material meeting standards is the same as the standards of medical silicone seal and Sterile Medical Seals.

2)Sealing Performance:The duckbill structure needs to be designed precisely. It has to fit tightly when closed. No matter if the cosmetic case is not moving, shaking, or in other situations, it can seal well to stop liquid from leaking.

What’s more, when there’s reverse pressure, it seals very reliably. It completely blocks backflow. This sealing performance meets the strict requirements of Aesthetic Device Seals. It’s as good as the leakage-proof standards of Medical Vial Cap Seals.

3)Adaptability:Its size and shape match the installation position of the cosmetic case exactly. After being installed, it stays stable and won’t fall off. It can stand external forces during daily use of the cosmetic case—like squeezing and vibration. It always keeps the one-way valve working normally. This adaptability makes sure it works with Cosmetic Instrument Parts and Specialized Accessories for Aesthetic Medical Equipment.

4）Environmental Resistance：It can stand common ingredients in aesthetic medical cosmetics. Things like different active substances and solvents. When stored or used in environments with different temperatures and humidity, its physical and chemical properties stay stable. It won’t have changes that affect its performance—like getting hard, brittle, or swollen. This ability to handle different environments makes it reliable for a long time. It’s similar to the durability of Beauty Equipment Gaskets in different application scenarios.