Core for racket string, racket string comprising such a core and corresponding manufacturing method
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United States of America Patent
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Dec 24, 2013
Grant Date -
Sep 27, 2012
app pub date -
Sep 30, 2010
filing date -
Oct 1, 2009
priority date (Note) -
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Abstract
This core (2) for a racket string, in particular for a tennis racket string, includes a thermoplastic matrix (24) in which filaments (22) are embedded, at least one of these filaments being of natural origin and the thermoplastic matrix (24) being made of a material which, at a temperature lower than a threshold temperature, at which the filaments (22) are not substantially damaged, has a viscosity making it suitable for an extrusion process. The matrix (24) includes a plurality of strands that are helically twisted in a first direction, each of the strands including a plurality of filaments (22) of natural origin that are helically twisted in a second direction, which is or is not opposite to the first direction.
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