EP1975918B1 - Corde pour instrument musical et procédé de fabrication correspondant - Google Patents

Corde pour instrument musical et procédé de fabrication correspondant Download PDF

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Publication number
EP1975918B1
EP1975918B1 EP07006172A EP07006172A EP1975918B1 EP 1975918 B1 EP1975918 B1 EP 1975918B1 EP 07006172 A EP07006172 A EP 07006172A EP 07006172 A EP07006172 A EP 07006172A EP 1975918 B1 EP1975918 B1 EP 1975918B1
Authority
EP
European Patent Office
Prior art keywords
string
musical instrument
winding
vinyl resin
coating film
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP07006172A
Other languages
German (de)
English (en)
Other versions
EP1975918A1 (fr
Inventor
Yoshihiko Tambara
Noriyuki Odagi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yamaha Corp
Original Assignee
Yamaha Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yamaha Corp filed Critical Yamaha Corp
Priority to EP07006172A priority Critical patent/EP1975918B1/fr
Priority to DE602007010235T priority patent/DE602007010235D1/de
Priority to AT07006172T priority patent/ATE487210T1/de
Publication of EP1975918A1 publication Critical patent/EP1975918A1/fr
Application granted granted Critical
Publication of EP1975918B1 publication Critical patent/EP1975918B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10D—STRINGED MUSICAL INSTRUMENTS; WIND MUSICAL INSTRUMENTS; ACCORDIONS OR CONCERTINAS; PERCUSSION MUSICAL INSTRUMENTS; AEOLIAN HARPS; SINGING-FLAME MUSICAL INSTRUMENTS; MUSICAL INSTRUMENTS NOT OTHERWISE PROVIDED FOR
    • G10D3/00—Details of, or accessories for, stringed musical instruments, e.g. slide-bars
    • G10D3/10—Strings

Definitions

  • the present invention relates to a string for a musical instrument and to a method for manufacturing such a string.
  • JP-A 2005-148730 JP-A 2005-148730
  • U.S. Patent No. 6,248,942 disclose a string for a musical instrument which includes a string body having a core and a winding wrapped repeatedly around the core, and a polymer cover formed by winding on the entirety of the string body a film in which the holes of a porous fluoropolymer material are filled with a low-temperature resin. Further, those documents also disclose a wound string construction in which a core is wrapped by a winding whose surface is covered by a polymer.
  • the string for a guitar described in Japanese Unexamined Patent Application, First Publication, No. 51-90809 is provided with rust-resistant properties by applying a benzotriazole solution to the string body, to form a monomolecular film.
  • a string for a musical instrument is used under exceedingly harsh conditions.
  • human fingers come into contact with the string. Consequently sweat adheres to the string, and there is the problem of rusting of the string.
  • the string of a musical instrument is required to have a pleasant timbre.
  • the string for a musical instrument described in JP-A S51-90809 has insufficient rust-resistance functions, and so there is the problem that rust occurs due to the sweat and dirt adhering to human hands, as well as to moisture and similar in the air.
  • US 2005/241454 A1 discloses a musical instrument string which combines the attributes of superior corrosion resistance, low stiffness, and long life during storage and end use. Superior corrosion resistance is achieved through surface treatment of wound strings with an organosilane compound, where the preferred winding is a copper alloy such as phosphor bronze, and the preferred organosilane surface treatment comprises an aminotrialkoxysilane such as N-2-aminoethyl-3-aminopropyltrimethoxysilane.
  • an object of the present invention to provide a string for a musical instrument which has both satisfactory rust-resistant properties and satisfactory timbre, as well as a method of manufacture of such a string.
  • a string for a musical instrument of the present invention has a core and a winding wound or wrapped around the core.
  • the winding has a winding body, and a coating film which includes a vinyl resin and aminotriazole, and is formed on the winding body.
  • the vinyl resin have a vinyl chloride monitor unit and a vinyl acetate monomer unit.
  • the vinyl resin further have a maleic acid monomer unit.
  • the thickness of the coating film be 2 ⁇ m or less.
  • the winding body be formed from copper or from an alloy comprising copper.
  • a method for manufacturing a string for a musical instrument has the steps of coating a liquid including a vinyl resin and aminotriazole on a winding body, drying the liquid to form the coating film so as to form a winding, and wrapping the winding around a core to form a wound string.
  • a string for a musical instrument which can combine both satisfactory rust-resistant properties and satisfactory timbre can be obtained.
  • Fig. 1 is a perspective view showing an example of a string for a musical instrument of this invention.
  • Fig. 2 is a side cross-sectional view showing the string for a musical instrument shown in Fig. 1 .
  • the string 1 for a musical instrument includes a core 10, the cross-section of which is a regular hexagon, and a winding 20, wound and wrapped around the side face of the core 10.
  • the cross-section of the winding 20 is circular.
  • the string 1 thus has a wound string construction which is generally used for guitar bass strings, for instance.
  • the winding 20 includes a winding body 21, and a coating film 22 formed thereupon as shown in Fig. 2 .
  • the core 10 is of steel, with diameter 0.42 mm.
  • the winding body 21 is of brass, with diameter 0.47 mm.
  • the coating film 22 is obtained by applying to the winding body 21 a coating liquid formed by dissolving a vinyl resin and aminotriazole in a solvent, and then drying.
  • vinyl chloride and vinyl acetate are preferable, and it is more preferable that both be used. That is, a vinyl resin which combines both a vinyl chloride monomer unit and a vinyl acetate monomer unit is preferable.
  • Vinyl chloride monomer unit means a monomer unit resulting from cleavage of the ethylene double bond of vinyl chloride.
  • Vinyl acetate monomer unit means a monomer unit resulting from cleavage of the ethylene double bond of vinyl acetate.
  • the mixing ratio of the vinyl chloride monomer unit in the vinyl resin be 95 to 60 weight percent, and more preferably 90 to 75 weight percent.
  • the lower limit rust-resistant properties are improved.
  • the upper limit the solubility can be adjusted when manufacturing the coating, which is desirable.
  • the mixing ratio of the vinyl acetate monomer unit in the vinyl resin be 40 to 5 weight percent, and more preferably 25 to 10 weight percent.
  • the solubility of the vinyl resin with respect to the solvent can be improved during manufacture of the coating liquid, which is desirable.
  • a value equal to or less than the upper limit through combination with other monomer units, rust-resistant properties can be improved, which is desirable.
  • the vinyl resin may also have other, copolymerizable, monomer units.
  • copolymerizable, monomer units include monomer units resulting from cleavage of the ethylene double bond of maleic acid and fumaric acid; either one type, or a combination of two or more types, can be used.
  • maleic acid monomer units be used in order to improve adhesion with metal.
  • the mixing ratio of the maleic acid monomer unit in the vinyl resin be 5 weight percent or less, and more preferably 2 to 0.5 weight percent.
  • One type of vinyl resin can be used, or two or more types of vinyl resin can be mixed and used.
  • the vinyl resin constitute 80 weight percent or more, and more particularly 97 weight percent or more, of the coating film (solid content).
  • aminotriazole includes the result of bonding triazole to an amino group, and derivatives thereof Through the characteristic structure of aminotriazole, having a triazole skeleton and an amino group bonded to the triazole skeleton, excellent rust-resistant properties, and in particular excellent rust-resistant properties when sweat adheres, while vibrating during a performance, while being scraped with a pick, and under other harsh conditions of use, are exhibited.
  • aminotriazole it is preferable that 3-amino-1,2,4-triazole, and more suitably 3-amino-1H-1,2,4-tnazole, and derivatives thereof, be used.
  • Derivatives include compounds in which an amino group, acyl group, alkyl group, or similar is substituted for a portion of the hydrogen atoms forming the amino group and triazole skeleton of the 3-amino-1,2,4-triazole. Examples include:
  • aminotriazole One type of “aminotriazole” can be used, or two or more types can be mixed and used.
  • the mixing ratio of "aminotriazole" in the coating film (solid content) be 0.1 to 20 weight percent, and still more preferably 0.3 to 3 weight percent.
  • the advantageous results of the invention can be enhanced.
  • a value equal to or less than the upper limit is preferable with respect to solubility in the coating liquid, and moreover if addition exceeds this value, no great difference in the advantageous results tends to appear, so that a lower value is more economical.
  • coating film means a film obtained by applying a coating liquid (application liquid), obtained by dissolving a vinyl resin and aminotriazole in a solvent, and then drying.
  • a coating liquid application liquid
  • a thin film of uniform thickness is obtained. Further, close adhesion between the winding body and the film is enhanced. As a result, although thin, a film with high hardness and high wear resistance is obtained.
  • Fig. 3 is an explanatory diagram showing a portion of the processes for manufacture of the string 1 for a musical instrument of the invention.
  • the winding 20 can be manufactured by guiding and dipping the winding body 21 into a coating vat 30 filled with coating liquid to form a coating film 22.
  • the winding 20 is then guided through a drying device 31 and suffers heating for example under heating conditions of 140 to 165°C so as to cause evaporation of the solvent and drying.
  • the string 1 for a musical instrument shown in Fig. 1 and Fig. 2 is obtained.
  • the coating liquid can for example be manufactured by dissolving a commercially marketed vinyl resin varnish and aminotriazole in an appropriate organic solvent.
  • Vinyl resin varnish is obtained by dissolving vinyl resin in an organic solvent; for example, products with a solid content of approximately 10 to 50 weight percent are commercially marketed.
  • solvents for use in the vinyl resin varnish include toluene, xylene and other hydrocarbon solvents, methyl isobutyl ketone (MIBK), acetone, methyl ethyl ketone (MEK), and other ketone solvents. Among them, toluene and MIBK are preferable.
  • the coating liquid When manufacturing the coating liquid also, an organic solvent similar to that of the resin varnish can be used.
  • an organic solvent similar to that of the resin varnish can be used.
  • the solubility of the aminotriazole can be improved, which is preferable. From the standpoint of transparency of the coating liquid, it is preferable that the lower alcohol be used in the amount of approximately 25 to 100 times the weight of the aminotriazole.
  • the solid content concentration in the coating liquid is for example approximately 5 to 10 weight percent.
  • the thickness of the coating film 22 be 2 ⁇ m or less. From the standpoint of rust-resistant properties, in practice, the thickness is 0.5 ⁇ m or greater, and more preferably 1 ⁇ m or greater.
  • the string for a musical instrument and method of manufacture thereof of this invention can be applied, without any limitation in particular, to applications in any musical instrument which uses strings.
  • any musical instrument which uses strings For example, use in guitars, pianos, mandolins, and similar is possible.
  • this invention is suitable for use with instruments which are employed in performances in which a pick or similar is used to pluck strings, or the hand is brought into direct contact with the strings during a performance, as in the case of guitars and similar.
  • the present invention enables provision of a string for a musical instrument and a manufacturing method thereof which combine satisfactory rust-resistant properties and satisfactory timbre.
  • the string of a musical instrument is plucked with a pick in a performance, so that the string vibrates. If the hardness or wear resistance of the coating film is inadequate, scratches may therefore occur in the coating film, and there are concerns that sweat may penetrate through such scratches to cause rusting.
  • a coating film is formed which is superior with respect to both hardness and wear resistance, so that rusting caused by harsh conditions arising in the circumstances of performances, including human sweat, vibrations, plucking with a pick and similar, can be adequately prevented, and moreover a satisfactory timbre is obtained.
  • the coating film has high hardness and characteristics such that scratches do not easily result from plucking and similar. Because of this, even in use under harsh conditions peculiar to the strings of musical instruments, such as coming into contact with sweat, wear caused by picks and similar, and vibrations, the string can exhibit stable rust-resistant properties, and is inferred to result in a satisfactory timbre.
  • a coating film comprising a vinyl resin has satisfactory sliding properties, the string affords excellent performance properties. Moreover, unpleasant noises are also reduced.
  • a coating film is formed on a winding body, and so in contrast with cases in which a winding body is wound around a core and a polymer cover or other film is provided on the entirety of the string body, excess resin film is not formed between adjacent windings of the winding body or between the core and the winding, and so a satisfactory timbre is obtained.
  • Strings were manufactured as described below.
  • steel wire with a hexagonal cross-section (diameter 0.42 mm) was used.
  • brass wire with a circular cross-section (diameter 0.47 mm) was used.
  • a vinyl resin varnish was prepared, consisting of a vinyl resin, comprising 86 weight percent vinyl chloride monomer unit, 13 weight percent vinyl acetate monomer unit, and 1 weight percent maleic acid monomer unit, dissolved in toluene, with a solid content concentration of 40 weight percent.
  • This coating liquid was applied to the winding body, and was dried at 150°C to cause evaporation of the solvent, forming a coating film of thickness 1.5 ⁇ m.
  • This winding was then wound onto a core to obtain a string for a musical instrument.
  • a winding body was wound onto a core to manufacture the string body, and then, similarly to the Embodiment, this was immersed in coating liquid, drying was performed under conditions similar to the above Embodiment, and a coating film was formed over the entirety of the side face of the string body, to obtain a string for a musical instrument.
  • the evaluation method and evaluation criteria were as follows.
  • the rust-resistant properties test includes the steps of: preparing artificial sweat which includes sodium chloride; coating the strings of the embodiment, and comparative examples 1 to 3 with the artificial sweat; leaving the strings coated with the artificial sweat in a thermo-hygrostatic chamber; and, after that, observing exterior of the strings.
  • Strings for musical instruments were used in short-time Fourier transform (STFT) analysis as the testing method, to measure the relation between time and attenuation of the harmonic components.
  • STFT short-time Fourier transform
  • the same guitar instrument was used to perform measurements under the same conditions.
  • As strings sixth (6 th or E) wound strings, from which tone differences are easily obtained, were used.
  • the 11th harmonic, 912 Hz is the frequency of the 11th harmonic of the E note of the six strings (fundamental tone, approximately 80 Hz),
  • the 25th harmonic, 2032 Hz, is the frequency of the 25th harmonic of the E note of the six strings (fundamental tone, approximately 80 Hz).
  • Embodiment of this invention was confirmed to yield a high sound pressure at the leading edge of the sound, with low attenuation as time passes, resulting in a satisfactory timbre, not inferior to that of Comparative Example 1.
  • Comparative Example 3 a coating film was provided on the entire string body, the sound pressure of sound was low at the leading edge of the harmonic components, attenuation with the passing of time was also large. Its timbre was, therefore, confirmed to be extremely poor compared with Comparative Example 1 and the Embodiment.
  • Table 2 Rust-resistant properties Timbre tests Embodiment O G Comparative Example 1 X G Comparative Example 2 A G Comparative Example 3 - N

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Stringed Musical Instruments (AREA)
  • Decoration Of Textiles (AREA)

Claims (6)

  1. Corde (1) pour instrument de musique, comprenant :
    une âme (10) ; et
    un enroulement (20) enroulé autour de l'âme, l'enroulement comportant un corps d'enroulement (21) et un film de revêtement (22) formé sur le corps d'enroulement, le film de revêtement comprenant une résine vinylique,
    caractérisé en ce que le film de revêtement comprend en outre de l'aminotriazole.
  2. Corde pour instrument de musique selon la revendication 1, dans laquelle la résine vinylique contient un élément monomère de chlorure de vinyle et un élément monomère d'acétate de vinyle.
  3. Corde pour instrument de musique selon la revendication 2, dans laquelle la résine vinylique comprend en outre un élément monomère d'acide maléique.
  4. Corde pour instrument de musique selon la revendication 1, dans laquelle l'épaisseur du film de revêtement est égale ou inférieure à 2 µm.
  5. Corde pour instrument de musique selon la revendication 1, dans laquelle le corps d'enroulement (21) est constitué de cuivre ou d'un alliage comprenant du cuivre.
  6. Procédé de fabrication d'une corde (1) pour instrument de musique, comprenant les étapes suivantes :
    appliquer un liquide de revêtement comprenant une résine vinylique à un corps d'enroulement (21),
    sécher le liquide de revêtement pour former un film de revêtement (22) de façon à former un enroulement (20), et enrouler l'enroulement (20) autour d'une âme (10),
    caractérisé en ce que le liquide de revêtement comprend en outre de l'aminotriazole.
EP07006172A 2007-03-26 2007-03-26 Corde pour instrument musical et procédé de fabrication correspondant Not-in-force EP1975918B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP07006172A EP1975918B1 (fr) 2007-03-26 2007-03-26 Corde pour instrument musical et procédé de fabrication correspondant
DE602007010235T DE602007010235D1 (de) 2007-03-26 2007-03-26 Saite für Musikinstrument und Herstellungsverfahren dafür
AT07006172T ATE487210T1 (de) 2007-03-26 2007-03-26 Saite für musikinstrument und herstellungsverfahren dafür

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07006172A EP1975918B1 (fr) 2007-03-26 2007-03-26 Corde pour instrument musical et procédé de fabrication correspondant

Publications (2)

Publication Number Publication Date
EP1975918A1 EP1975918A1 (fr) 2008-10-01
EP1975918B1 true EP1975918B1 (fr) 2010-11-03

Family

ID=38624390

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07006172A Not-in-force EP1975918B1 (fr) 2007-03-26 2007-03-26 Corde pour instrument musical et procédé de fabrication correspondant

Country Status (3)

Country Link
EP (1) EP1975918B1 (fr)
AT (1) ATE487210T1 (fr)
DE (1) DE602007010235D1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5190809A (fr) 1975-02-08 1976-08-09
US5883319A (en) 1995-11-22 1999-03-16 W.L. Gore & Associates, Inc. Strings for musical instruments
US7217876B2 (en) 2003-11-14 2007-05-15 Gore Enterprise Holdings, Inc. Strings for musical instruments
US7476791B2 (en) 2004-04-29 2009-01-13 Rohrbacher Technologies, Llc Organosilane surface treated musical instrument strings and method for making the same
US20060174745A1 (en) * 2005-02-08 2006-08-10 D Addario James Method for coating wire for a musical instrument string, and coated string

Also Published As

Publication number Publication date
DE602007010235D1 (de) 2010-12-16
EP1975918A1 (fr) 2008-10-01
ATE487210T1 (de) 2010-11-15

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