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Old 02-11-2013, 10:04 AM   #40
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Originally Posted by corners View Post
Gosen Polymaster is a copoly with a rectangular cross-section. So 1.1 mm thick and 1.55 mm wide in the thicker version, Polymaster I. Poly strings break because interstring friction heats up the intersections, melting a notch into the main string, which is doing all the sliding around, that eventually gets so deep the string snaps.

A cross string with rectangular cross section should diffuse the friction-generated heat over a larger area of the main string. Instead of all the friction being focused on a "point" where the two circular strings interface, the main should lie along the entire 1.55mm width of the flat, ribbon-like Polymaster cross. In theory, this should result in much less localized heat, less melting, less notching, and ultimately longer string life.

The rub, in this case, is that Polymaster, being a very soft poly, has poor tension maintenance. All the best polys for tension maintenance are the stiff ones. But stringing a bit higher to compensate for the anticipated loss should work. And if using a kevlar main the softer cross might be welcome.
Interesting concept. The reason poly enhances performance is the sliding out of place, and snapping back. Increasing surface area between strings would increase the static, and kinetic friction between the mains and crosses therby impeding the main's ability to be displaced and return rapidly.

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