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1. Why do we call “PP” cartridge? – General Knowledge

2026.03.08
We always hear sales person called 1st stage filter “PP cartridge”. Why do they call it PP?

1. Source of information
PP cartridge is made from Polypropylene material which micro-fiber will be melted and spun into a cylinder type. We usually use word “melt-blown” to describe this type of cartridge. 
 

2. Inventor
The 1st company invented “PP cartridge” was 『Osmonic co.,』 in USA. This type of cartridge is less expensive than string wound cartridge. The process of “PP cartridge” is quicker and cheaper. For these reasons PP cartridges are most common so far.
 

3. Function:
PP cartridge can remove substance or particle from water. Normally PP cartridge will be installed as 1st stage in water filter.


4. Microns:
When you ask sales person『What the micron PP cartridge does?』 the sales people usually answered 1 micron, 5 or 10 microns.
And it takes more cost and higher technology to produce 1 micron PP cartridge. Of course, the function of 1 micron PP cartridge will be better, too.

 

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