CN2351798Y - string - Google Patents

Abstract

A string line includes a core line formed by a plurality of nylon multifilaments impregnated with high-pressure nylon polyurethane resin bundles, a moisture-hardening polyurethane layer covering the outer periphery of the core line, a reinforcing outer yarn layer provided outside the moisture-hardening polyurethane layer, and a coating layer coated outside the reinforcing outer yarn layer. The string line has elasticity, wear resistance and a reinforced overall structure.

Description

string

The utility model relates to a string.

Generally, the strings are twisted with nylon thin wires, and thermoplastic resin is adhered between the nylon thin wires through an impregnation tank during twisting, and the thermoplastic resin makes the strings elastic, but also makes them The string is soft and lacks wear resistance, especially when the racket is hitting the ball, the string is hit by the ball to generate high pressure and high heat, which will cause the string to wear.

There is a kind of string, which is coated with a moisture-type hardened PU (polyurethane) on the outside of the nylon thin wire. The harder characteristic of the moisture-type hardened PU enables the string to maintain better wear resistance. In order to solve the above-mentioned lack of wear resistance of the string, but relatively lack of elasticity, when hitting the ball, the user's hand bears a large reaction force when hitting the ball, which is likely to cause sports injuries.

The purpose of the utility model is to provide a string with wear resistance and elasticity.

The string of the utility model includes a core wire synthesized by a plurality of nylon multifilament bundles impregnated with thermoplastic resin, and is characterized in that: the outer periphery of the core wire is covered with a moisture-hardening polyurethane layer, and the wet There is a reinforced outer yarn layer on the outside of the air-curing polyurethane layer. The reinforced outer yarn layer is formed by winding a large number of reinforced nylon yarns. The yarn winding direction of the reinforced outer yarn layer is the same as the core wire The stranding direction is opposite, and the reinforced outer yarn layer is coated with a covering layer, and the covering layer is formed by mixing silica gel and nylon resin.

The string is characterized in that: the plastic plastic resin is high-pressure nylon polyurethane.

The structure of each layer of the string of the utility model can be made in an automatic way, and the bonding force between the layers of the structure is strong, and the overall structural strength is good, and the string is elastic inside and wear-resistant outside, and it is elastic when hitting the ball and wear resistance.

The string of the present utility model is described in detail below by preferred embodiment and accompanying drawing, in the accompanying drawing:

Fig. 1 is a schematic perspective view of the first preferred embodiment of the utility model.

Fig. 2 is a combined cross-sectional view of the end face of the above-mentioned preferred embodiment of the utility model.

Fig. 3 is a molding flow chart of the above-mentioned preferred embodiment of the utility model.

As shown in Figures 1 and 2, the utility model embodiment string 10 is composed of a core wire 11, a moisture-hardening PU layer 12, an outer yarn layer 13 and a covering layer 14 in sequence from the inside to the outside. . The core wire 11 is composed of many nylon multifilaments 111 impregnated with high-pressure nylon PU resin 112 (thermoplastic resin), and the nylon multifilaments 111 are mixed with high-pressure nylon PU resin 112 to make the core wire 11 softer. And elastic.

The moisture hardening PU layer 12 is coated on the outer periphery of the core wire 11 and has better wear resistance due to its harder texture.

The reinforced outer yarn layer 13 is formed by winding a large number of reinforced nylon yarns, and is coated on the outside of the moisture hardening type PU layer 12. The twist direction is opposite, so that the strengthening outer yarn layer 13 and the core wire 11 have better bonding strength.

The covering layer 14 is made of a mixture of silicone rubber and nylon resin, which is relatively hard and has enhanced wear resistance, and is wrapped around the outer periphery of the strengthening outer yarn layer 13 .

The string 10 composed of the above-mentioned components has the characteristics of inner softness and outer hardness, and utilizes the elasticity generated by the inner high-pressure nylon PU resin 112 (thermoplastic plastic resin) and the outer moisture-curing PU layer 12 and the bag. The cooperation of the coating 14 makes the string 10 overall elastic and wear-resistant, which can resist the high heat and high pressure generated when hitting the ball, and prolong the service life.

The combination of the components of the string 10 of the present invention is made according to the following manufacturing process (as shown in Figure 3):

1. The nylon multifilaments 111 wound on most nylon bobbins 1 first pass through a tension controller 2 to make the tension of each nylon multifilament 111 equal.

2. Nylon multifilament 111 penetrates into an impregnation tank 3 through the guidance of a guide mold 301, and the interior of this impregnation tank 3 is filled with high-pressure nylon PU resin 112, so that nylon multifilament 111 is attached to high-pressure nylon PU resin 112, and When the nylon multifilament 111 attached with high-pressure nylon PU resin 112 passes through the impregnation tank 3 , it is restrained by a control mold 302 so that the high-pressure nylon PU resin 112 maintains a predetermined impregnation amount to form the core wire 11 .

3. The core wire 11 continues to penetrate into a PU groove 4, and one side of the PU groove 4 is filled with moisture-curable PU, and the moisture-curable PU layer 12 can be coated on the peripheral surface of the core wire 11. When the groove 4 is formed, it is restricted by a control port 401 in a gradually converging shape to control the coating thickness of the moisture-hardening PU layer 12 .

4. A plurality of yarn winders 501 are provided on the peripheral shaft of a turntable 5, and the reinforced nylon yarn 131 wound on the yarn winders 501 is wound around the outside of the moisture hardening PU layer 12 in a clockwise direction to form a Strengthen the outer yarn layer 13.

5. A cladding groove 6 is located on one side of the turntable 5, and contains a mixture of silica gel and nylon resin inside, and coats a cladding layer 14 on the outside of the strengthening outer yarn layer 13 to form a string 10.

Sixth, the string 10 continues to penetrate into the inside of a retracting mechanism 7, and a control wheel 701 is used to control the pitch of the string 10 wound on the retracting wheel 702, and the retracting mechanism 7 rotates counterclockwise, and the retracting mechanism 7 and the turntable 5 rotate in the opposite direction, which can make the string 10 have a better bonding force between the layers.

Claims (2)

1. a string of a musical instrument comprises by the synthetic heart yearn of nylon multifilament bundled of the majority of impregnation thermoplastic plastic rubber resin, it is characterized in that:

This heart yearn periphery coats a moisture-curable type polyurethane layer, this moisture-curable type polyurethane layer outside is provided with one and strengthens outer layer, the outer layer of this reinforcement is that the reinforcement nylon yarn institute winding with majority forms, this yarn winding direction of strengthening outer layer is opposite with heart yearn strand sth. made by twisting direction, this strengthens the outside coating of outer layer one clad, and this clad is to mix with silica gel and nylon resin.

2. the string of a musical instrument as claimed in claim 1 is characterized in that: this plasticity plastic resin is a high pressure nylon polyurethane.

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