JP2007074502A - Fiber laminate structure having sound wave generating function and fiber product - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fiber laminate structure having a sound wave generating function and a fiber product composed by using the fiber laminated structure. <P>SOLUTION: A cloth-like fiber structure is laminated on piezoelectric film on both sides of which electrode films are laminated using polyurethane system adhesives, etc. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a fiber laminate structure having a sound wave generation function and a fiber product using the fiber laminate structure.

Conventionally, fiber structures have been widely used in various applications such as clothing, interiors, vehicle materials, and industrial applications, but fiber structures having a sound wave generating function have not been proposed so much.
On the other hand, a piezoelectric film in which electrode films are laminated on both sides can convert electric energy into sound waves, and is therefore used as a sound wave generator such as a speaker or a piezoelectric transducer for stringed instruments (for example, Patent Document 1, Patent). Reference 2). Further, Patent Document 3 proposes a silencer that generates sound having a phase opposite to that of noise. However, these devices are not fiber structures.
In addition, although the fiber laminated structure which laminated | stacked the fiber structure on the piezoelectric film is proposed, it does not have a sound wave generation function, but aimed at sound absorption (for example, patent document 4, (See Patent Document 5).

JP 7-203591 A JP 7-152378 A JP 2005-25109 A JP 2000-148155 A JP 2003-241765 A

  The present invention has been made in view of the above background, and an object thereof is to provide a fiber laminate structure having a sound wave generation function and a fiber product using the fiber laminate structure.

  As a result of intensive studies to achieve the above-mentioned problems, the present inventor does not impair the sound wave generation function of the piezoelectric film even when the fabric-like fiber structure is laminated on the piezoelectric film having electrode films laminated on both sides thereof. The present inventors have found that a fiber laminate structure having a desired sound wave generation function can be obtained, and have further earnestly studied to complete the present invention.

  Thus, according to the present invention, there is provided a “fiber laminate structure having a sound wave generation function, wherein a fabric-like fiber structure is laminated on a piezoelectric film having electrode films laminated on both sides thereof”. Is done.

  At this time, the piezoelectric film is preferably formed of a polyvinylidene fluoride resin. Moreover, it is preferable that the electrode film is formed of deposited aluminum. Such an electrode film may be formed of a conductive polymer. Moreover, it is preferable that the said fabric-like fiber structure is comprised with a polyester fiber.

  The fiber laminate structure of the present invention preferably has a speaker function. In addition, it is preferable that a microphone for detecting ambient noise is provided, and that a mute function is provided by generating a sound wave having a phase opposite to that of the ambient noise.

  In addition, according to the present invention, there is provided any textile product selected from the group consisting of clothes, curtains, car seats, tents, projection screens, and residential walls, using the above fiber laminate structure. The

  According to the present invention, a fiber laminate structure having a sound wave generation function and a fiber product using the fiber laminate structure are obtained.

Hereinafter, embodiments of the present invention will be described in detail.
In the present invention, the piezoelectric film may be a polymer piezoelectric film or a composite piezoelectric film, such as a polyvinylidene fluoride resin or polyvinylidene sianite resin, which is polarized so as to vibrate in a plane direction, or a piezoelectric ceramic plate. Illustrated. In particular, a piezoelectric film made of polyvinylidene fluoride (PVDF) that has been subjected to polarization treatment is excellent in flexibility, excellent in sensitivity characteristics, can be thinned and easily formed into an arbitrary shape, and the like. It has characteristics and is particularly preferable. The thickness of the piezoelectric film is preferably in the range of 40 to 250 μm.

  Electrode films are laminated on both sides of the piezoelectric film. The electrode film is preferably formed of aluminum deposited by a normal vapor deposition method, but may be formed of a conductive polymer. In that case, polyethylenedioxythiophene etc. are illustrated as a conductive polymer. The thickness of the electrode film is preferably in the range of 100 to 2000 mm.

  The fiber laminate structure of the present invention is formed by laminating a fabric-like fiber structure on the piezoelectric film on which an electrode film is laminated. Here, the fabric-like fiber structure may be laminated on both surfaces of the piezoelectric film on which the electrode film is laminated, or may be laminated on one surface.

  The fiber constituting the fabric-like fiber structure is not particularly limited, and is cotton, wool, hemp, viscose rayon fiber, polyester fiber, polyetherester fiber, acrylic fiber, nylon fiber, polyolefin fiber, cellulose acetate fiber. Ordinary fibers such as aramid fibers may be used. Of these, polyester yarns made of polyester fibers are particularly preferable in terms of tensile strength and dyeability.

  As such polyester, terephthalic acid is the main acid component, and alkylene glycol having 2 to 6 carbon atoms, that is, at least one selected from the group consisting of ethylene glycol, trimethylene glycol, tetramethylene glycol, pentamethylene glycol and hexamethylene glycol. Examples include polyesters having a main glycol component of a particular glycol, particularly preferably ethylene glycol. Such a polyester may have a small amount (usually 30 mol% or less) of a copolymer component as required.

  In this case, examples of the bifunctional carboxylic acid other than terephthalic acid used include isophthalic acid, naphthalene dicarboxylic acid, diphenyldicarboxylic acid, diphenoxyethanedicarboxylic acid, β-hydroxyethoxybenzoic acid, P-oxybenzoic acid, 5 -Aromatic, aliphatic, and alicyclic bifunctional carboxylic acids such as sodium sulfoisophthalic acid, adipic acid, sebacic acid, and 1,4-cyclohexanedicarboxylic acid. Examples of the diol compound other than the glycol include aliphatic, alicyclic and aromatic diol compounds such as cyclohexane-1,4-dimethanol, neopentyl glycol, bisphenol A and bisphenol S, and polyoxyalkylene glycol. Can give.

  Such polyester may be synthesized by any method. For example, in the case of polyethylene terephthalate, terephthalic acid and ethylene glycol are directly esterified, or a lower alkyl ester of terephthalic acid such as dimethyl terephthalate is transesterified with ethylene glycol, or terephthalic acid and ethylene oxide are used. And the first stage reaction to produce a glycol ester of terephthalic acid and / or its low polymer, and the first stage reaction product is heated under reduced pressure until the desired degree of polymerization is reached. It may be produced by a second stage reaction for condensation reaction.

  Further, in the polyester, a fine pore forming agent, a cationic dyeing agent, an anti-coloring agent, a heat stabilizer, a flame retardant, a fluorescent brightening agent, a matte, and the like are included in the polyester as long as the object of the present invention is not impaired. You may add 1 type, or 2 or more types of an agent, a coloring agent, an antistatic agent, a hygroscopic agent, an antibacterial agent, a negative ion generator.

  The fiber may be a short fiber or a long fiber. Among these, long fibers are preferable because a soft texture is easily obtained. Further, it may be a long fiber subjected to false twist crimping. At that time, the total fineness of the long fibers and the number of filaments are preferably in the range of the total fineness of 33 to 330 dtex and the number of filaments of 1 to 200. In addition, the cross-sectional shape of the single fiber is not particularly limited, and may be a normal round cross section, or a flat cross section, a constricted flat cross section, a triangular cross section, a square cross section, a 3-14 leaf cross section, or a hollow cross section.

The structure of the fabric-like fiber structure is not particularly limited, and may be a woven or knitted fabric or a nonwoven fabric knitted and woven by a normal method. For example, examples of the woven structure of the woven fabric include a three-layer structure such as plain weave, twill weave and satin weave, a change structure, a single double structure such as a vertical double weave and a horizontal double weave, and a vertical velvet. The type of knitted fabric may be a weft knitted fabric or a newly knitted fabric. Preferred examples of the weft knitting structure include flat knitting, rubber knitting, double-sided knitting, pearl knitting, tuck knitting, float knitting, one-sided knitting, lace knitting, bristle knitting, and the like. Single atlas knitting, double cord knitting, half tricot knitting, back hair knitting, jacquard knitting and the like are exemplified. The number of layers may be a single layer or a multilayer of two or more layers. The basis weight of the fabric-like fiber structure is preferably 500 g / m ² or less (more preferably 30 to 300 g / m ² ). If the basis weight is larger than 500 g / m ² , the sound wave generation function may be impaired.

In such a fabric-like fiber structure, as long as the object of the present invention is not impaired, conventional dyeing finish processing, printing processing, water repellent processing, raising processing, ultraviolet shielding or antibacterial agent, deodorant, Various processes that provide functions such as insect repellents, phosphorescent agents, retroreflective agents, and negative ion generators may be additionally applied.
As a method for bonding the fabric-like fiber structure to the piezoelectric film on which the electrode film is laminated, for example, a method of bonding using an epoxy-based adhesive is preferably exemplified.

  In the present invention, the sound wave generation function is a function of converting electrical energy into sound waves. Such a function is preferably a speaker function. In addition, as disclosed in FIG. 1 of Japanese Patent Application Laid-Open No. 2005-25109, a microphone for detecting ambient noise is provided, and a silencing function is achieved by generating a sound wave having a phase opposite to that of ambient noise. preferable.

In the fiber structure of the present invention, since the cloth-like fiber structure is laminated on the piezoelectric film on which the electrode film is laminated, it has a fiber appearance only by having a sound wave generating function.
In addition, according to the present invention, there is provided any textile product selected from the group consisting of clothes, curtains, car seats, tents, projection screens, and residential walls, using the above fiber laminate structure. The Such a textile product has a function of generating sound waves.

  Next, although the Example and comparative example of this invention are explained in full detail, this invention is not limited by these. In addition, each measurement item in an Example was measured with the following method.

[Example 1]
A plain fabric (weighing 130 g / m ² ) was woven using normal polyethylene terephthalate multifilament false twist crimped yarn 56 dtex / 72 fil for warp and weft.
On the other hand, a flexible piezoelectric film (KF piezo film (trade name) manufactured by Kureha Chemical Co., Ltd.) in which aluminum (thickness: 500 mm) was vapor-deposited on both surfaces of a film made of polarized polyvinylidene fluoride resin was prepared.

Next, the plain woven fabric was adhered to both surfaces of the flexible piezoelectric film with a polyurethane-based adhesive to obtain a fiber laminate structure having a sound wave generating function.
Next, a curtain is sewn using the fiber laminate structure, attached to the room, and the aluminum layer of the fiber laminate structure and the headphone terminal of the portable music player are connected by a conductive wire to reproduce music. Music was heard and it had a speaker function.

[Example 2]
In Example 1, a noise detection microphone is installed on the outdoor side of the curtain, and a sound wave generation device that analyzes noise and generates a sound wave having an opposite phase is installed, and the sound wave generation device and the aluminum layer of the fiber laminate structure are provided. tied up, connected. Then, when a sound wave having a phase opposite to that of the noise was generated from the fiber laminated structure, the noise was reduced in the room and the sound was silenced.

  According to the present invention, a fiber laminate structure having a sound wave generation function and a fiber product using the fiber laminate structure are provided, and the industrial value thereof is extremely large.

Claims (8)

  A fiber laminated structure having a sound wave generation function, wherein a fabric-like fiber structure is laminated on a piezoelectric film having electrode films laminated on both surfaces thereof.   The fiber laminate structure according to claim 1, wherein the piezoelectric film is formed of a polyvinylidene fluoride resin.   The fiber laminated structure having a sound wave generating function according to claim 1 or 2, wherein the electrode film is formed of deposited aluminum.   The fiber laminate structure according to claim 1 or 2, wherein the electrode film is formed of a conductive polymer.   The fiber laminated structure which has a sound wave generation function in any one of Claims 1-4 with which the said fabric-like fiber structure is comprised with a polyester fiber.   The fiber laminated structure which has a sound wave generation function in any one of Claims 1-5 which has a speaker function.   A fiber laminated structure having a sound wave generation function according to any one of claims 1 to 5, further comprising a microphone for detecting ambient noise, and having a sound deadening function by generating a sound wave having a phase opposite to that of the ambient noise. .   A textile product selected from the group consisting of clothes, curtains, car seats, tents, projection screens, and residential walls, wherein the textile laminate structure according to any one of claims 1 to 7 is used.