The material of fiber loose tube.

that be used the material of fiber loose tube

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I do not understand your question...

Keith Cress
Flamin Systems, Inc.-

Keith,

Loose tube fibre has a number of small tubes within the cable, each of which contains a fibre core. The ID of the tube is significantly larger than the OD of the fibre it contains, hence the term 'loose tube'.
This link shows some of the different types:
cpewhf,

I think the main differences will be due to the physical properties of the materials: heat resistance, low temperature flexibility, suitability for manufacturing process. You've raised an interesting and unusual question. It may be best posed to the manufacturers of fibre cable. I've asked the fibre installers I know and gotten a negative response.

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Sometimes I only open my mouth to swap feet...

Thanks a bunch Scotty. Most interesting.. Never heard of it before but makes sense.

Keith Cress
Flamin Systems, Inc.-

Thanks. I think so. It is due to the physical properties of the materials. I heard the PE loose tubes are more used in the US market and the PBT loose tubes are more used in our country. The pp loose tubes are more suitable the low temperature. PE is softer, higher shrink rate, and more flexible than PBT, harder for manufacturing process, and more expensive. The manufacturers shall know it.