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Thread: What purpose do those membranes serve?

  1. #1
    Join Date
    Mar 2006
    Posts
    196

    Default What purpose do those membranes serve?

    I just don't get it. Maybe someone could explain it to me: those white membranes on my Medela pump. Why exactly are they necessary? I just don't see their purpose, but am I missing something?

  2. #2
    Join Date
    Jan 2006
    Posts
    1,551

    Default Re: What purpose do those membranes serve?

    I think it has something to do with the suction. If they are damaged or missing or mis-aligned, the suction power is reduced or gone. Anyone else have a more scientific explanation?

    Mary

  3. #3
    Join Date
    Jan 2006
    Posts
    222

    Default Re: What purpose do those membranes serve?

    I'm not a rocket scientist or anything, but from the distant memories I have of physics class, you need a tight seal to form a vacuum, which is how the suction happens. The membrane forms the seal and then when the pump stops sucking the air out of the sealed "system," the membrane flaps open easily to let the milk into the bottle. That's why the pump doesn't work so well if they're damaged. Not a terribly scientific explanation, but that's how I understand it.

  4. #4
    Join Date
    Jun 2006
    Posts
    222

    Default Re: What purpose do those membranes serve?

    No membrane, no milk. It is key to the suction process.

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