RE: [Paddlewise] Composite vs. Plastic Info - aluminum?

From: Shawn Baker <shawnkayak_at_yahoo.com>
Date: Fri, 28 Feb 2003 15:53:22 -0800 (PST)
"Patrick Maun" <patrick_at_patrickmaun.com> wrote:
>There is also Eddyline with Modulus Technology, 

Kevlar or fiberglass inside a polycarbonate (Carbonlite 2000*) shell
instead of gelcoat

>HTP from Prijon, 

HTP is their acronym for blowmolded polyethylene.  Rather than
rotomolded, where a bunch of plastic pellets are dropped into a hot,
rotating mold, and melted into a boat; blowmolding involves a hot blob
of molten plastic inside a cold mold.  A blast of hot gas is injected
into the blob, and it expands to fill the mold.  When the hot plastic
hits the cold mold, the plastic cools instantly into a "crystalline"
molecular structure, which is much tougher and stiffer than a
rotomolded boat which is cooled slower.

Milk jugs and polyethylene soda bottles are both made of the same
plastic.  Milk jugs are made in a fashion similar to rotomoulding. 
Soda bottles are blowmolded.

Couldn't tell you about Azul kayaks, never seen one.  Some of them look
a little funky to my eye--not that Corran Addison isn't a masterful
whitewater kayak designer..I sometimes wonder if most of their focus
isn't on the ww kayaks, and they're just trying to cash in on the sea
kayak market with Azul.  But I could be wrong (and have been before!).

Shawn

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Received on Fri Feb 28 2003 - 15:53:26 PST

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