JPH09248835A - Production of sound absorbing and insulating composite plastic panel containing magnetic fluid included capsules - Google Patents

Abstract

PROBLEM TO BE SOLVED: To impart excellent soundproof characteristics and electromagnetic wave absorbing effect and to enhance mechanical strength or durability by laminating a fiber reinforced plastic molding material and a plastic sheet containing magnetic fluid included capsules to place them on a press and curing and molding them by using a press. SOLUTION: A fiber reinforced plastic molding material 4 is placed on a press 5 and, subsequently, a plastic sheetlike article 3 containing magnetic fluid included capsules 2 is laminated thereon and both of them are cured and integrally molded by the press 5 to obtain a sound absorbing and insulating composite plastic panel 1. The plastic sheet like article 3 is formed by shaping plastic composed of various thermosetting or thermoplastic resins into a sheet, a film or a panel. The content of magnetic fluid included capsules in the plastic sheetlike article 3 is usually set to 30 90wt.%. As the fiber reinforced plastic molding material 4, a thermosetting resin is used.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound absorbing / insulating composite plastic panel containing a magnetic fluid-containing capsule, and more particularly to a method for producing a sound absorbing / insulating plastic panel useful for absorbing and insulating building materials.

[0002]

2. Description of the Related Art Conventionally, for exterior wall materials, lining materials, roof materials for buildings, soundproof walls for highways and railways,
Plastic panels having a soundproof effect are widely used because of their light weight. Usually, in order to impart a soundproofing effect, a porous material such as foamed plastic or glass wool, or one having a finely divided hollow cell inside a plastic panel is used.

However, these porous and hollow cell structures are all in the low and middle frequency range (100 to 200 Hz).
However, there is a problem that the sound absorbing and insulating effect is poor and the sound absorbing and insulating effect cannot be obtained over a wide sound range. Also, since it mainly has continuous holes, it has poor resistance to local loads,
There is also the problem of insufficient mechanical strength.

As a soundproof for the low and middle tone range, for example,
Japanese Patent Application Laid-Open No. 53-72313 discloses a soundproof panel in which the inner space of a sandwich-shaped panel is filled with sand particles. However, with this method, it is difficult to fill the inner space of the panel closely with no gaps in order to fully exhibit the soundproofing properties, and it is difficult to reduce the weight because the sand is heavy. There is a problem.

Further, Japanese Patent Laid-Open No. 5-279569 discloses a vibration damping material in which hollow microspheres made of an inorganic material such as aluminosilicate are mixed in a silicon gel having a specific pressure transmitting property. However, there is no teaching regarding sound absorption / insulation, because it is intended for vibration and damping at 100 Hz or less.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method for producing a lightweight and sound absorbing / insulating plastic panel having excellent sound absorbing / insulating properties for use as a building wall material or soundproof wall by solving the problem. I am trying.

[0007]

DISCLOSURE OF THE INVENTION The present invention relates to a method for producing a sound absorbing / insulating composite plastic panel in which a fiber reinforced plastic is integrally molded on at least one surface of a plastic sheet containing a magnetic fluid-containing capsule, and a fiber reinforced plastic molding. The present invention relates to a method for producing a sound-absorption / insulation composite plastic panel, which comprises laminating a plastic sheet containing a material and a capsule containing a magnetic fluid on a press, placing the plastic sheet on the press, and curing the plastic sheet by the press. As a result, a sound absorbing / insulating composite plastic panel in which a fiber reinforced plastic is integrally molded on one surface of a plastic sheet containing a magnetic fluid-containing capsule is obtained.

The present invention also provides a method for producing a sound-absorption and sound-insulating composite plastic panel in which a fiber-reinforced plastic is integrally molded on at least one side of a plastic sheet containing a magnetic-fluid-encapsulating capsule, which comprises a fiber-reinforced plastic molding material and a magnetic fluid. The present invention relates to a method for producing a sound-absorbing / insulating composite plastic panel, which comprises sequentially laminating a plastic sheet containing an encapsulating capsule and a fiber-reinforced plastic molding material on a press, placing the plastic material on the press, and clamping and curing the material. As a result, a sound absorbing / insulating composite plastic panel in which fiber reinforced plastics are integrally molded on both sides of a plastic sheet containing a magnetic fluid-containing capsule is obtained.

In the method for manufacturing the sound absorbing and sound insulating composite plastic panel of the present invention, a magnetic fluid in which magnetic fine particles such as ferrite are dispersed in an organic solvent is provided in the hollow portion of a capsule whose outer shell is made of an organic material film such as vinyl resin. By including the magnetic fluid-encapsulated capsules containing the inside of the plastic sheet-like material, the sound energy from the outside transmitted to the outer shell of the capsule is converted into vibration energy by the magnetic fine particles in the magnetic fluid in the capsule. As a result, a sound absorbing / insulating effect is obtained. Moreover, since the magnetic fine particles have a larger mass than the outer shell of the capsule, a sound absorbing / insulating sheet material having a better sound absorbing / insulating effect in a lower sound range can be obtained.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The method for producing a sound absorbing / insulating composite plastic panel according to the present invention is a method for producing a sound absorbing / insulating composite plastic panel in which fiber reinforced plastic is integrally molded on at least one surface of a plastic sheet containing a magnetic fluid-containing capsule. At this point, the fiber-reinforced plastic molding material is placed on the press, and then the plastic sheets containing the magnetic fluid-encapsulating capsules are laminated and then cured and molded by the press to be integrally molded.

The method for producing a sound absorbing / insulating composite plastic panel according to the present invention is a method for producing a sound absorbing / insulating composite plastic panel in which a fiber reinforced plastic is integrally molded on at least one surface of a plastic sheet containing a magnetic fluid-containing capsule. , Fiber reinforced plastics molding material,
It is placed on a press, and then a plastic sheet containing a magnetic fluid-containing capsule is laminated, and then cured and molded by pressing to be integrally molded.

In the present invention, the magnetic fluid is magnetic fine particles dispersed in an organic solvent, and the capsule has a shell made of a plastic film exemplified by a vinyl resin. The magnetic fluid-containing capsule contains a magnetic fluid in which fine ferrite particles are dispersed in an organic solvent,
It is preferable that the outer shell is a vinyl resin.

A method of manufacturing the sound absorbing / insulating composite plastic panel of the present invention will be described with reference to the drawings. FIG. 1 is a schematic cross-sectional view showing an example of a method for manufacturing a sound absorbing and insulating composite plastic panel of the present invention. FIG. 2 is a schematic cross-sectional view showing an example of a sound absorbing / insulating composite plastic panel obtained by the method for producing a sound absorbing / insulating composite plastic panel of the present invention. In FIG. 1, in a method for producing a sound absorbing / insulating composite plastic panel 1 in which a fiber reinforced plastic 4 is integrally molded on at least one surface of a plastic sheet-like material 3 containing a magnetic fluid-containing capsule 2, a fiber reinforced plastic molding material is used. If it is placed on a press, then the plastic sheet-like material 3 containing the magnetic fluid-containing capsule 2 is laminated, and then cured and molded by the press 5 to be integrally molded,
The sound absorbing / insulating composite plastic panel 1 is obtained.

The plastic sheet material 3 is mainly a plastic sheet material, for example, thermosetting resin such as unsaturated polyester resin, phenol resin, epoxy resin, vinyl ester resin, melamine resin or urea resin, or Saturated polyester resin, polyethylene resin,
It is a sheet-shaped form such as a sheet, a film or a panel made of a plastic made of a thermoplastic resin such as polypropylene resin, polyamide resin, polyvinyl chloride resin, polystyrene resin or acrylic resin. Of course, for example, a sheet-like material which is a fiber-reinforced plastic 4 in which these plastics are combined with reinforcing fibers such as glass fibers, carbon fibers, and aramid fibers may be used.

The thickness of the plastic sheet material 3 is not particularly limited and may be appropriately determined depending on the intended use and type of building material, but is preferably 0.05 to 100 mm.
If the thickness is less than 0.05 mm, wrinkles may occur when the fiber-reinforced plastic is integrally molded, or the fiber may break due to molding pressure, etc., resulting in practically large weight and volume, which makes construction difficult. There is.

The content of the magnetic fluid-containing capsule in the plastic sheet-like material 3 is not particularly limited, but is usually
It is 30 to 90% by weight, preferably 40 to 50% by weight. If it is less than 30%, the sound absorbing / insulating effect or the electromagnetic wave absorbing property may be insufficient, and if it exceeds 90%, molding of the plastic sheet may be difficult.

In order to obtain the plastic sheet-like material 3 containing the magnetic fluid-containing capsule 2, if the plastic is a thermosetting resin, the liquid thermosetting resin is added with a predetermined amount (30) of the magnetic fluid-containing capsule. ˜90% by weight), and if the plastic of the plastic sheet material is a thermoplastic resin, it may be melted and softened by heating, and then a predetermined amount of the magnetic fluid-containing capsule may be kneaded.

At this time, a hollow glass balloon, a shirasu balloon or a magnetic fluid (which does not contain magnetic fluid) is appropriately used.
Microballoons such as plastic balloons, or known modifiers such as calcium carbonate, iron powder, silica sand, and pigments can be added.

The reinforcing fiber of the fiber reinforced plastic 4 integrally molded with the plastic sheet material 3 containing the magnetic fluid encapsulation is not particularly limited as long as it is a reinforcing material used in fiber reinforced plastics. Although glass fiber, carbon fiber, aramid fiber, boron fiber and the like can be used, glass fiber is particularly preferable in consideration of its properties, price and the like. When glass fibers are used, those having a fiber diameter of 3 to 20 μm can be used.

Further, the plastic of the fiber reinforced plastic 4 integrally molded with the plastic sheet-like material 3 containing the magnetic fluid encapsulation is not particularly limited as long as it is a thermosetting resin, for example, unsaturated polyester resin, epoxy resin. , Melamine resin, urethane resin, phenol resin, vinyl ester resin and the like can be used.

[0021]

【Example】

Example 1 An example specifically carried out by using the method for manufacturing a sound absorbing and insulating composite plastic panel of the present invention shown in FIG. 1 will be described. As a plastic sheet containing a magnetic fluid-containing capsule, ferrite fine particles (average diameter 100 nm)
Is dispersed in paraffin oil as an organic solvent, and the outer shell is made of vinylidene chloride-acrylonitrile resin and has an average particle size of 36 μm.
The thing containing the magnetic fluid containing capsule of m was used.
In FIG. 1, a fiber-reinforced plastic is a molding base made of glass fibers and an unsaturated polyester resin (sheet molding compound, thickness 3 mm), and the fiber-reinforced plastic molding base is placed on the molding press 7. A plastic sheet material containing 50% by weight of the magnetic fluid encapsulation is overlaid on the material, and then 150 ° C, 3
After press molding for minutes, a sound absorbing and insulating composite plastic panel of the present invention was obtained. Based on JIS A 1416, the sound absorption / insulation characteristics of the obtained sound absorption / insulation composite plastic panel are
As a result of measuring the sound transmission loss at the center frequencies of 125 Hz, 500 Hz, and 2000 Hz, 17 dB and 25 d, respectively.
It was B and 34 dB.

Comparative Example 1 A composite plastic panel was obtained in the same manner as in Example 1 except that the magnetic fluid-containing capsule was not included in the plastic sheet material. The sound absorption and insulation characteristics of the obtained composite plastic panel are JIS A 1
Based on 416, center frequencies 125 Hz, 500 Hz,
As a result of measuring the sound transmission loss at 2000 Hz, they were 8 dB, 15 dB, and 23 dB, respectively.

[0023]

EFFECTS OF THE INVENTION By the method for producing a sound-absorption / insulation composite plastic panel of the present invention, a sound-absorption / insulation composite panel having not only sound insulation properties but also excellent sound absorption / insulation properties particularly in a low and middle tone range, which is useful as a building material or a sound insulation wall is provided. , Can be easily obtained. Further, since the sound absorbing / insulating composite plastic panel contains the magnetic fluid-containing capsule, it has an electromagnetic wave absorbing effect, and a sound absorbing / insulating composite plastic panel useful as a material for a radio wave absorber can be easily obtained. Further, the one obtained by integrally molding or pasting the fiber reinforced plastic on at least one surface of the sound absorbing / insulating sheet material of the present invention has mechanical strength and durability, and is particularly useful as a building material or a soundproof wall. A composite plastic panel can be easily obtained.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view showing one embodiment of a method for manufacturing a sound absorbing and insulating composite plastic panel of the present invention.

FIG. 2 is a schematic explanatory view showing an example of a sound absorbing / insulating composite plastic panel obtained by the method for producing a sound absorbing / insulating composite plastic panel of the present invention.

[Explanation of symbols]

 1 Sound absorption / insulation composite plastic 2 Magnetic fluid encapsulation capsule 3 Plastic sheet material 4 Fiber reinforced plastic 5 Press

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Claims (3)

[Claims] 1. A method for producing a sound absorbing / insulating composite plastic panel in which a fiber reinforced plastic is integrally molded on at least one surface of a plastic sheet containing a magnetic fluid encapsulation capsule, which comprises a fiber reinforced plastic molding material and a magnetic fluid encapsulation capsule. A method for producing a sound-absorption / insulation composite plastic panel, comprising laminating and placing a plastic sheet on a press, and curing and molding by the press. 2. A method for producing a sound absorbing / insulating composite plastic panel in which a fiber-reinforced plastic is integrally molded on at least one surface of a plastic sheet containing a magnetic fluid-containing capsule, wherein a fiber-reinforced plastic molding material and a magnetic fluid-containing capsule are included. A method for producing a sound-absorbing / insulating composite plastic panel, comprising laminating and placing a plastic sheet and a fiber-reinforced plastic molding material on a press in order, performing mold clamping, and curing molding. 3. The sound absorbing / insulating composite plastic panel according to claim 1, wherein the magnetic fluid-containing capsule contains a magnetic fluid in which magnetic fine particles are dispersed in an organic solvent, and the outer shell is a vinyl resin. Production method.