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Extruded vs. Sintered

post #1 of 10
Thread Starter 
I just purchased my first ski with an extruded base.
Do I treat it differently than a ptex base?
What is the difference care-wise?
post #2 of 10
Most good skis are made with extruded bases. It is still the same material, just manufactured differently.
post #3 of 10
Thread Starter 
I got the title right, but not the question.
I intended to ask if extruded bases should be treated differently than sintered bases.
Most skis have sintered bases, but the extruded bases are more common on park skis as they are more durable.
I understand that the extruded bases also do not absorb as much wax.
post #4 of 10
Quote:
Originally Posted by quickk9 View Post
I got the title right, but not the question.
I intended to ask if extruded bases should be treated differently than sintered bases.
Most skis have sintered bases, but the extruded bases are more common on park skis as they are more durable.
I understand that the extruded bases also do not absorb as much wax.
That makes perfectly good sense.
post #5 of 10
Sintered bases are made by heating powdered ptex so that it fuses to a porous material capable of absorbing wax. It is then cut into sheets. Extruded bases are just squeezed out in a molten sheet and allowed to cool. I think all racing skis have sintered bases.

Sintered bases would presumably be more prone to oxidation if left unwaxed.

Extruded bases are cheaper to make, and I would imagine they are tougher, and slower, with poor wax retention..
post #6 of 10
Quote:
Originally Posted by newfydog View Post
Sintered bases would presumably be more prone to oxidation if left unwaxed.

Extruded bases are cheaper to make, and I would imagine they are tougher, and slower, with poor wax retention..
a bit pointless to wax them with anything but hard wax?
post #7 of 10
Quote:
Originally Posted by cantunamunch View Post
a bit pointless to wax them with anything but hard wax?
I don't think they are all that bad. I remember even my old yellow bottomed Kneissls in the 60's would absorb wax, and they were definitely a low tech extruded base. Soft red wax would stain the bottom.

Ever but booze in an old nalgene bottle? (the whitish polyethylene ones, not the hard clear ones out now) You could taste it for months. Sintered bases have more porosity, but no doubt, extruded polyethylene has some too.
post #8 of 10
Quote:
Originally Posted by newfydog View Post
Ever but booze in an old nalgene bottle? (the whitish polyethylene ones, not the hard clear ones out now) You could taste it for months. Sintered bases have more porosity, but no doubt, extruded polyethylene has some too.
How else does a group of 15 year olds smuggle liquor through airports when they go skiing?

/i guess they'd have to do it two shots at a time in a Kip Hawley is an Idiot bag these days.
Quote:
Most good skis are made with extruded bases.
Opposite of that.
post #9 of 10
oops, yup that's what i meant. "most good skis are made with sintered bases."

I knew that, just typed like an idiot. Just goes to show that you shouldn't believe things you read on the internet. Even if said by people who normally aren't idiots.
post #10 of 10
I knew you what you meant. I do that kind of thing all the time.
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