Posted by muchybruno1 4 years ago In:

muchybruno1
muchybruno1 Asked:

Is plastic porous?

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OronD
OronD Answered:

Hi,


"Plastic" is not a material but rather a famaly of materials.  Within that family there are materials of different structure and properties.  In any case the answer, in general, is yes "plastic" is porous (Tiny microscopic pores).
Best regards,
Love is the battery of life....
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panzrwagn
panzrwagn Answered:

When we say plastic to describe materials, it is the moldability characteristic of the polymer materials, with long chains of molecules that are polymerized hydrocarbons.  The porosity of a polymer is a function of many things and yes, some are very porous.  Goretex is a plastic menbrane that is waterproof, but allows individual water molecules tho pass through.  So it makes great rainwear, waterproof on the outside, breatahable to get rid of evaporated body water (sweat) from the inside.  Another example is regular polyethylene plastic wrap vs Saran wrap.  Polyethylene passes flavors through where Saran blocks them.  That's why Saran works so much better for longer term storage and that's why grovery stores usually don't use polyethylene wrap - it allows the scenting agents from things like laundry detergents to penetrate fresh food, especially meat, giving the off flavor of something that comes from a supermarker.

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panzrwagn
panzrwagn Answered:

When we say plastic to describe materials, it is the moldability characteristic of the polymer materials, with long chains of molecules that are polymerized hydrocarbons.  The porosity of a polymer is a function of many things and yes, some are very porous.  Goretex is a plastic menbrane that is waterproof, but allows individual water molecules tho pass through.  So it makes great rainwear, waterproof on the outside, breatahable to get rid of evaporated body water (sweat) from the inside.  Another example is regular polyethylene plastic wrap vs Saran wrap.  Polyethylene passes flavors through where Saran blocks them.  That's why Saran works so much better for longer term storage and that's why grovery stores usually don't use polyethylene wrap - it allows the scenting agents from things like laundry detergents to penetrate fresh food, especially meat, giving the off flavor of something that comes from a supermarker.

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rubberguy
rubberguy Answered:

My pepsi bottle is Plastic and it doesn't leak, is it porous?

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OronD
OronD Answered:

Hi,


Being porous doesn't mean it leaks......  Yellow cheese has big pores in it, if you put water on one side, will it get to the ather side ?  Sure not (unless it's very thin.......).  In order to leak the pores have to create a continuous path..... and that is not the case in plastics or your Pepesi bottle.  Emagine there are many tiny caves under the ground will it enable you to move under the ground from one place to another ?  (if the tiny, mini-caves are not inter- connected [to create a path] the answer is "no").  
You may be surprised but all matals and alloys contain pores.  The permitted amount / size / distribution etc of pores are specified in the material specification (of that specific metal / alloy).  And metals / alloys don't leak either.....  not my car......  lol......
Best regards,
Love is the battery of life....
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rubberguy
rubberguy Answered:

My brain is porous cause all that you told me just went through and out the top. But thats ok I still have my pepsi. Thanks...

Smile

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