JPH09103519A - String gut for carbon racket - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a string gut for a racket having a single yarn structure without using the conventional core and winding structure, the operating performance superior to the conventional one, and a low manufacturing cost. SOLUTION: Polyamide synthetic fiber filaments 2 added with a small quantity of carbon form a linear raw material fundamentally excellent in strength and durability, special coating 3 is applied to its surface, and a string gut 1 for a racket having soft driving feeling and good ball holding performance and excellent in shock absorbing property, controllability, and durability is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inexpensive racket string (gut) which has excellent controllability, impact absorption, and elasticity at the time of hitting a ball, as well as excellent water resistance and durability. is there.

[0002]

2. Description of the Related Art Strings for rackets are thin and strong,
In order to meet the demand for durable ones, the core yarn is wound with a winding structure to maintain strength.

[0003]

This structure complicates the manufacturing process, takes a lot of time and money, and makes the strings (gut) expensive. Furthermore, since the structure in which the winding yarn is wound around the core yarn, the vibration at the time of hitting the ball is complicated, the hand feels uncomfortable, and the sound of the hitting ball is not so good.

[0004]

[Means for Solving the Problems] In order to solve such a problem, a filament which does not have a wound yarn structure with only a core yarn has a tenacity to reduce the impact at the time of hitting a ball, and the tension and As a result of searching for a material having a small change in yield strength, it was found that a polyamide synthetic fiber filament containing a small amount of carbon is suitable. This filament is used as a material and taken as a single yarn. The surface is not slippery or glossy as it is, so the surface was coated with a special liquid.

[0005]

As described above, by containing a small amount of carbon, it has the same strength as the conventional 2.3-layer structure. Conventionally, with the single-thread structure, the tension gradually weakens compared to immediately after the tension rises due to aging, and the loose tension does not easily return to its original state when it gets wet in the rain. In the case of the present invention, although it has a single yarn structure, there is little secular change, and even if it loosens in a high humidity condition such as rain, it can be immediately returned to its original condition if the humidity decreases. By the action of carbon, it was possible to provide tenacity and tension to the polyamide-based synthetic fiber filament, and to provide a filament having a single yarn structure that is resistant to aging and humidity. As a result, the single-thread structure racket strings (
Gut) could be manufactured. The surface of the filament of single yarn structure made in this way has gloss and
Soaked in a special liquid to give slip and proof strength.
By increasing the slip in this way, the operability when string (gut) is stretched on the racket is improved.
I was able to do well. ,

[0006]

EXAMPLE A polyamide-containing synthetic fiber filament was prepared by blending a small amount of carbon with polyamide and taking out a monofilament from a nozzle with an extruder. The surface was treated with a coating liquid at 90 ° C. for 2.5 hours, washed, and dried. The carbon provides tenacity and strength, a decrease over time, and a quick return from looseness due to changes in humidity, enabling string (gut) for rackets with a single yarn structure. 1
Internal protection by coating a few millimeters in 00
It was possible to add gloss, slippage, durability, etc.

[0007]

As described above, racket strings (gut) having a single yarn structure can be used, and an inexpensive manufacturing method is possible. The thus-produced product has the following advantages over the conventional structure in which the winding yarn is wound around the core yarn. (1) Good repulsion, soft feel at impact and good ball holding performance. (2) The shock absorption performance is outstanding. (3) It has excellent controllability. (4) The speed of recovery from the effect of humidity due to rain is good. There are many good aspects.

[Brief description of the drawings]

FIG. 1 is a sectional perspective view of a racket string (gut) of the present invention.

[Explanation of symbols]

 1 is strings (gut) 2 is carbon-containing polyamide synthetic fiber 3 is special coating

[Procedure amendment]

[Submission date] September 27, 1996

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] Name of invention

[Correction method] Change

[Correction contents]

[Title of Invention] Strings gut for rackets containing carbon

Claims (2)

[Claims] 1. A string (gut) for a racket comprising a polyamide synthetic fiber filament containing a small amount of carbon. 2. A string (gut) for a racket, wherein the string (gut) for a racket according to claim 1 is further coated with a coating agent.