WO2001095664A1 - Plateau de support pour equipement audio - Google Patents

Plateau de support pour equipement audio Download PDF

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Publication number
WO2001095664A1
WO2001095664A1 PCT/JP2001/004897 JP0104897W WO0195664A1 WO 2001095664 A1 WO2001095664 A1 WO 2001095664A1 JP 0104897 W JP0104897 W JP 0104897W WO 0195664 A1 WO0195664 A1 WO 0195664A1
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Prior art keywords
weight
strength
inorganic
resin
cured product
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PCT/JP2001/004897
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English (en)
Japanese (ja)
Inventor
Yoshimi Matsuno
Tetsuji Ogawa
Kenji Sato
Toshihiro Nomura
Satoshi Takahashi
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Ibiden Co., Ltd.
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Application filed by Ibiden Co., Ltd. filed Critical Ibiden Co., Ltd.
Publication of WO2001095664A1 publication Critical patent/WO2001095664A1/fr

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/66—Pulp catching, de-watering, or recovering; Re-use of pulp-water

Definitions

  • the present invention relates to an audio equipment support plate.
  • the present invention provides means that can improve sound quality in a simpler way.
  • a papermaking sludge is cured, and a fibrous material is mixed in an inorganic amorphous body composed of at least one oxide selected from Si, A1, and Ca. It is a sound equipment support plate.
  • the specific gravity of the acoustic device support plate is preferably 0.6 or more, and more preferably 1 or more.
  • Composite cured body fibrous material is mixed in the inorganic amorphous body in Young's modulus 1. 4 ⁇ 2. 7 X 1 0 3 MP a (1. 4 ⁇ 2. 7 X 1 0 4 kgcm 2) It is rigid and does not absorb the vibration of the force itself, and since it is an amorphous material, it has no orientation like a crystal and does not have any modulation during vibration propagation. As a result, no harmonics are generated and there is no sound modulation, and high sound quality can be obtained.
  • the specific gravity (average specific gravity) of the composite cured product exceeds 1. Because it is heavy and rigid, it is difficult to absorb the vibration of the speaker itself.
  • the specific gravity is 1.1 or more. More desirable.
  • the acoustic device support plate '6 is arranged on the floor surface, and a spike force 5 and the like are arranged thereon. Further, the acoustic device support plate 6 may be embedded in the floor.
  • the acoustic device support plate of the present invention is obtained by drying and hardening papermaking sludge, and has a fibrous form in an inorganic amorphous body composed of at least one oxide selected from Si, Al, and Ca. It is composed of a composite cured body in which objects are mixed. As described later, it is possible to provide a decorative layer, a reinforcing layer, and the like on the surface of the composite cured body.
  • the composite cured body constituting the acoustic device support plate of the present invention will be described. It is desirable that the inorganic amorphous body has an inorganic crystal containing Ca and a mixture of fibrous materials. '
  • the strength can be improved by the inorganic crystal containing Ca inhibiting the growth of cracks and improving the compressive strength by increasing the hardness and density.
  • the present invention is characterized in that an inorganic amorphous body has an inorganic crystal containing Ca, and a fibrous material is mixed therein.
  • the inorganic crystal containing Ca can prevent the crack from developing, and can improve the strength by increasing the hardness and density to improve the compressive strength.
  • the content of the inorganic crystal containing Ca is preferably 3% by weight or more and 50% by weight or less based on the composite. This is because the strength can be increased.
  • At least Si, A1 a composite cured body in which a fibrous material is mixed in an inorganic amorphous body containing at least Ca, wherein the amount of Ca is in terms of CaO It is desirable that the amount is triple to 63% by weight based on the total weight of the composite cured product.
  • the fracture toughness value cannot be increased, while if it exceeds 63% by weight, the fracture toughness value cannot be increased.
  • the above-mentioned amount of Ca is 6% by weight based on the total weight of the composite cured body in terms of CaO. /. It is desirably about 63% by weight. This is because the strength of the composite can be increased.
  • the amount of Ca is 3% by weight or more and 6% by weight based on the total weight of the composite cured product in terms of CaO. Desirably less than / 0 . This is because the fracture toughness '14 value can be increased.
  • FIG. 1 is a schematic cross-sectional view of the composite cured product of the present invention.
  • FIG. 2 is a schematic cross-sectional view of the composite cured product of the present invention.
  • FIG. 3 is a chart of X-ray diffraction of Example 1.
  • FIG. 4 is a chart of X-ray diffraction of Example 2.
  • FIG. 5 is a diagram showing a use state of the audio equipment support plate of the present invention.
  • Figure 6 shows the system used in the papermaking method.
  • Figure 8 is a graph showing the compressive strength of the test examples, the relationship between the weight ratio of C a 0 / A 1 2 0 3.
  • FIG. 9 is a graph showing the relationship between the bending strength and the compressive strength of the test example and the weight ratio of CaO.
  • FIG. 10 is a graph showing the relationship between the nail pull-out strength and fracture toughness value of the test example and the weight ratio of CaO. Explanation of reference numerals
  • FIG. 1 schematically shows the structure of a composite cured product used for the audio equipment support plate of the present invention.
  • the composite cured product 1 is characterized in that inorganic crystals containing Ca are present in the inorganic amorphous material 2, and fibrous materials 3 are mixed in the inorganic amorphous material 2.
  • the presence of the inorganic crystal improves the compressive strength, shear strength and crack resistance. 'The reason for this is not clear, but the crystals hinder the progress of cracks, increase the hardness and density, making cracks less likely to occur, and play the role of struts for compressive force. It is estimated that.
  • an inorganic powder 4 may be added.
  • Such crystals Hydrogen Aluminium Silicate ⁇ Kaolinite, Zeo lite, Gehlenite, syn, Anorthite ⁇ Melitite, Gehlenite - synthetic ;, tobermori te ⁇ xonotlite ⁇ et Ringite and, S i 0 2, A 1 2 0 3, C a 0, N a 2 OM g 0, P 2 0 5, S0 3, K 2 0, T I_ ⁇ 2, MnO, oxides such as F e 2 0 3 Oyobi ⁇ ⁇ , and C a C_ ⁇ There are crystals such as 3 (Calcite).
  • the content of the crystal is preferably 0.1 to 50% by weight, more preferably 3% by weight or more, based on the total weight of the composite cured product. The reason is that if the number of crystals is too small, the above effect cannot be obtained.
  • the A l 2 0 3 _S i 0 2 based crystal compound is Hydrogen Aluminium Silicate, Kaolinite, Zeolite, A 1 2 0 3 - C a O -based crystalline I ⁇ product is Calcium Aluminate, C a O — Crystalline compounds of S i 0 2 system are Calcium Silicate, A 1 z O 3 -S i 0 2 -C a O type crystal compounds are Gehlenite, syn, Anorthite, Al 2 0 3 — S i 0 2 —C a O— Mg O based crystalline compound is Melitite ⁇ ehlenite e-synthetic ⁇ 0
  • calcium carbonate may be added as a crystal.
  • Calcium carbonate itself is not a strength-expressing substance, but it is thought that by surrounding the calcium carbonate with an inorganic amorphous material, it contributes to an increase in strength by preventing cracks from developing, etc. It is presumed that it will play a role of a support for the power of the sword.
  • the content of the calcium carbonate is desirably 48% by weight or less based on the total weight of the composite cured product. The reason for this is that if it exceeds 48% by weight, the flexural strength decreases. Further, it is desirable that the content be 0.1% by weight or more. If the content is less than 0.1% by weight, it does not contribute to improving the strength.
  • the inorganic amorphous material used in the present invention is not particularly limited, and is selected from Si, Al, Ca, Na, Mg, P, S, K :, Ti, Mn, Fe, and Zn.
  • Inorganic amorphous bodies of various oxides containing two or more elements can be used.
  • the term “inorganic amorphous body composed of two or more oxides” refers to an oxide (1) an oxide (2) ⁇ an oxide (n) (where n is a natural number)
  • the oxide (1), the oxide (2), and the oxide (n) are different inorganic oxides.
  • the inorganic amorphous substance is an amorphous compound formed by a solid solution or hydration reaction of two or more oxides.
  • Such inorganic amorphous compounds were analyzed by X-ray fluorescence analysis to determine the constituents of the oxide (Al, Si, Ca, Na, Mg, P, S, K, Ti, Mn, Fe). , And Zn), and a halo is observed in the range of 2 °: 15 ° to 40 ° in the analysis chart by X-ray diffraction.
  • Halo is a gradual undulation of the intensity of X-rays and is observed as a broad swell on the X-ray chart.
  • the halo has a half width of 2 2: 2 ° or more.
  • the inorganic amorphous body 2 and the inorganic crystalline body interact with each other to become a strength-generating substance, and the fibrous material 3 is dispersed in the inorganic amorphous body 2 and broken.
  • the bending strength value ⁇ the impact resistance can be improved.
  • the amorphous body has more pores and the specific gravity is smaller than the crystalline body.
  • the amorphous body has the advantage that not only is it possible to obtain a homogeneous hardened body without anisotropy in strength, but also because it is an amorphous body, sufficient strength can be obtained at a low density.
  • the material is amorphous, the frequency of the sound is not modulated, and the sound quality does not change. Further, since the fibrous material is more easily dispersed uniformly in the amorphous state than in the crystalline state, it is considered that the fracture toughness value is also improved.
  • a l 2 O 3, S i 0 2, C a O, Na 2 O, MgO, P 2 0 5, S0 3, K 2 0, T i O 2 , MnO is preferably selected from F e 2 0 3 and Z nO.
  • a 1 2 0 3 -S i 0 2 -C a O system or A 1 2 O 3 - "S i 0 2 - C a O- inorganic amorphous body composed of an oxide-based or the inorganic amorphous, complex quality body are optimal.
  • the oxide in the latter inorganic amorphous body a 1 2 0 3,.
  • a 1 2 0 3 - inorganic amorphous body consisting of S i 0 2 -C a O system, A 1 2 0 3, S i 0 2 and C a whole or a part of the components of O to each other It is a compound having an amorphous structure generated by solid solution or hydration. That is, 1 2 0 3 and 3 i 0 2, S I_ ⁇ 2 and C a O, A l 2 0 3 and C a O and A 1 2 0 3,, S i 0 2 Oyo It is considered to include any of the compounds formed by solid solution or hydration reaction in combination with C and O.
  • a 1 2 0 3, S i 0 2 and C a O at least one oxide of a system added to the other, i.e. A 1 2 0 3 - consisting of C a O-oxide - S i 0 2 inorganic amorphous body, in addition to the combination of the above a 1 2 0 3 -S i 0 2 -C a O system, a 1 2 0 3 oxide, S i 0 2 and oxide, and C a O oxide, A 1 2 0 3, S I_ ⁇ 2 and oxide, S i 0 2, C a O , and oxides, A 1 2 0 3, C a O , and oxides, and A 1 2 0 3, S i 0 2, is considered to include any compound that produces by C a O and the solid solution or hydration in combination with oxide.
  • the oxide is 2 or more, i.e., A 1 2 0 3 - S i 0 2 - inorganic C a O-product (1) ... 'monoxide (eta) system (eta is a natural number of 2 or more)
  • these oxides for example, oxide (1), oxide (2) ⁇ ⁇ oxide ( ⁇ ) ( ⁇ is a natural number of 2 or more, and oxide ( ⁇ ) is ⁇ means respectively different values different oxides, and a 1 2 0 3, S I_ ⁇ 2, C a O is obtained by excluding the) solid solution or water in combination of two or more selected from each of compounds that produced by hydration reaction or the like, a 1 2 0 3, S I_ ⁇ 2, C a O have in solid solution in two or more combinations selected from generating by hydration such compounds, further oxide (1), oxide (2) - - - oxides.
  • (n) (n is a natural number of 2 or more) and least one selected from each of, a 1 2 0 3, S I_ ⁇ 2 Selected from C a O To any compound that produces by solid solution or hydration such a set together with at least one considered including.
  • Such inorganic amorphous compounds were analyzed in addition to Al, Si, and Ca, as well as the elements (Na, Mg, P, S, K :, Ti, At least one selected from Mn, Fe, and Zn) was confirmed, and a halo was observed in the range of 20: 15 ° to 40 ° in the analysis chart by X-ray diffraction.
  • Halo has low X-ray intensity It is a gentle undulation and is observed as a broad swell on the X-ray chart.
  • Such an inorganic amorphous compound can be said to be an inorganic amorphous substance containing at least A1, Si, and Ca.
  • a 1 2 0 3, S i 0 2 and C a O and oxides to be combined is one or or more, A 1 2 0 3, S i 0 2, C a (met excluding available Oyopi Z or non-metallic oxides, for example, Na 2 0, MgO, P 2 0 5, S0 3, K 2 0, T 0 2, ⁇ , from F e 2 0 3 and Zeta Itashita This choice can be made based on the properties expected of the composite cured product.
  • Na 2 0 or kappa 2 0 because can be removed with an alkali, by performing the removal process prior to plating treatment, act as a go-between dark Kino anchor a rough be plated surface of the composite cured surface Can be done.
  • MgO is, Al 2 0 3, contributing to S i 0 2, C a O solid solution to strength development, greatly improve the bending strength of Ya impact resistance.
  • T i 0 2 is a white coloring material and also acts as a photo-oxidation catalyst, so it can forcibly oxidize organic contaminants attached and can be washed only by irradiating light. Alternatively, it has a unique effect that it can be used as various filters and reaction catalysts.
  • MnO is ⁇ coloring material
  • F e 2 0 3 is colorant bright color
  • ZnO is useful as a colorant whitish.
  • These oxides may be present alone in the inorganic amorphous body.
  • composition of the inorganic amorphous body respectively in terms of 1 2 O 3, S i 0 2 and C a O, A 1 2 O 3: 3 ⁇ 5 1 % by weight relative to the total weight of the composite cured body
  • the composition of Si, A1, and Ca referred to in the present invention is the composition in the composite cured product, and is the total composition in the Ca-based crystal and the inorganic amorphous material. Therefore, when an inorganic substance is added, the composition includes the added inorganic substance.
  • the composition is adjusted by a method of selecting a papermaking sludge having a desired Ca component amount, a method of mixing and mixing a plurality of papermaking sludges, and adjusting the composition by adding calcium carbonate, silica sand, or the like. The method is adopted.
  • Papermaking sludge has various compositions, but generally has low Ca component. This is because the pH is made acidic in order to coagulate and settle the papermaking sludge, so that the Ca component does not remain on the settling side.
  • the average specific gravity is obtained by dividing the composite cured product into small pieces, measuring the specific gravity of each small piece, and measuring the average.
  • the number of small pieces is preferably 10 or more.
  • the variation is the value obtained by selecting the specific gravity with the largest difference from the average specific gravity in the measured range, and dividing the difference between the specific gravity and the average specific gravity (expressed as + if the average specific gravity is larger, or 1 if smaller). Is expressed in%.
  • the variation exceeds ⁇ 10%, warpage or peeling occurs.
  • the variation is optimally within ⁇ 5%. This is because the bending strength increases.
  • amorphous structure can be confirmed by X-ray diffraction. That is, if a halo is observed in the region of 26: 15 ° to 40 ° by X-ray diffraction, it can be confirmed that the material has an amorphous structure.
  • a crystal may be included in the amorphous structure.
  • Aluminium Silicate Kaolinite, Zeo ⁇ ite, Gehlenite, syn x Anorthite, Mel it ite, Geh ⁇ enite - synthetic, tobermorite ⁇ xonotlite ⁇ ettringite and, S i 0 2, A 1 2 0 3, C a O, Na 2 0 , MgO, P 2 ⁇ 5, S_ ⁇ 3, K 2 0, T i 0 2, Mn 0, F e 2 0 3 and oxides such as Z nO, and C a C0 3 (Calcite) crystals, such as the They may be mixed. .
  • crystals are not considered to be strength-generating substances by themselves, but are considered to have effects such as improving hardness and density to improve compressive strength and suppressing crack propagation.
  • the content of the ⁇ crystal is preferably 0.1 to 50% by weight, more preferably 3.% by weight or more based on the total weight of the composite cured product. The reason for this is that if the number of crystals is too small, the above effect cannot be obtained, while if the number is too large, the strength is reduced.
  • the A l 2 0 3 - S i 0 2 based crystalline compound of Hydrogen Aluminium Silicate, Kaolinite, Zeolite, A 1 2 0 3 - C a O -based crystalline compound of Calcium Alurainate C a O-S i 0 2 -based crystalline ⁇ product is Calcium Silicate, a 1 2 0 3 - S i 0 2 - C a O -based crystalline i ⁇ product of Gehlenite, syn, a anorthite, or a l 2 0 3 -S i ⁇ 2 _C a O—Mg O-based crystalline compound is Melitite, Gehlenite-synthetic.
  • C a as crystals, Gehlenite, syn (C a 2 A 1 2 0 7) ⁇ Melitite-synthetic (C a 2 ( M g 0 5 A 1 0i 5) (S i x. 5 A 1 0 5 0 7)) , Whylenite- synthetic (C a 2 (Mg 0. 25 A 1 0. 75) (S i ⁇ 25 A 1 o. 75O 7)), anorthite, ordered (C a 2 A 1 2 Si 2 0 8 ) and calcium carbonate (Calcite).
  • halogen may be added to an inorganic amorphous material composed of at least two or more types of oxides.
  • This halogen acts as a catalyst for the solid solution and hydrate formation reaction, and also acts as a combustion inhibitor.
  • the content is desirably 0.1 to 1.2% by weight. This is because if it is less than 0.1% by weight, the strength is low, and if it exceeds 1.2% by weight, harmful substances are generated by combustion.
  • the halogen chlorine, bromine, and fluorine are preferable.
  • calcium carbonate (CaCO: Calcite) may be added.
  • Charcoal Calcium acid itself is not a strength-expressing substance, but it is thought that by surrounding the calcium carbonate with an inorganic amorphous body, it contributes to the improvement of the strength by preventing cracks from developing.
  • the content of calcium carbonate is desirably 48% by weight or less based on the total weight of the composite cured product. The reason for this is that if it exceeds 48% by weight, the flexural strength decreases. Further, the content is desirably 0.1% by weight or more. If the content is less than 0.1% by weight, it does not contribute to the improvement in strength.
  • the binder desirably comprises one or both of a thermosetting resin and an inorganic binder.
  • a thermosetting resin at least one resin selected from a phenol resin, a melamine resin, an epoxy resin, and a urea resin is desirable.
  • the inorganic binder is preferably at least one selected from the group consisting of sodium silicate, silica gel and alumina sol.
  • thermosetting resin for example, at least one thermosetting resin selected from a phenol resin, a melamine resin, an epoxy resin, a urethane resin, and a urethane resin may be applied to the surface.
  • the fibrous material mixed in the inorganic amorphous material may be either organic or inorganic.
  • the organic fibrous material may be at least one selected from the group consisting of chemical fibers such as vinylon, polypropylene and polyethylene, and an organic fibrous material composed of polysaccharides, and is an organic fibrous material composed of polysaccharides. It is desirable. This is because, the polysaccharide is present OH group, since easy bound to A 1 2 0 3, S i 0 2 or various compounds of C a O through hydrogen bonding.
  • the polysaccharide is desirably at least one compound selected from amino sugars, peronic acid, starch, glycogen, inulin, liqueur, cellulose, chitin, chitosan, hemicellulose and pectin.
  • organic fibrous material composed of these polysaccharides pulp, pulp power, ground paper, and crushed waste paper such as newspapers and magazines are advantageously applicable.
  • the pulp contains about 10 to 30% by weight of lignin in addition to cellulose.
  • inorganic fibrous materials include alumina whiskers, SiC whiskers, and silicon whiskers. At least one selected from Likaa Remina ceramic fiber, glass fiber, carbon fiber and metal fiber can be used.
  • the content of the fibrous material is 2 to 75% by weight; Is desirable. The reason for this is that if the content is less than 2% by weight, the strength of the composite cured product decreases, while the weight is 75%. If the ratio exceeds / 0 , fire prevention performance, water resistance, dimensional stability, etc. may be reduced. Further, the average length of the fibrous material is desirably 10 to 300. If the average length is too short, no entanglement occurs, and if the average length is too long, voids are formed, and the strength of the inorganic cured product is likely to decrease. -It is recommended that the above composite cured product be obtained by drying and coagulating and hardening industrial waste.
  • papermaking sludge is a pulp residue containing inorganic substances, which is low in cost because it uses industrial waste as a raw material, and contributes to solving environmental problems.
  • the papermaking sludge itself has a function as a binder, and has an advantage that it can be formed into a desired shape by kneading with other industrial waste.
  • high-quality waste paper contains a large amount of calcium-based crystals, such as kaolin and carbonated calcium carbonate. Therefore, papermaking sludge containing a large amount of waste paper is suitable.
  • the water content in the papermaking sludge is desirably 20 to 80% by weight. If the water content is less than 20% by weight, the composition becomes too hard and molding becomes difficult, while if it exceeds 80% by weight, the composition becomes a slurry and molding becomes difficult.
  • mixing the inorganic powder 4 in the composite cured product 1 improves the fire resistance, or forms a strength-expressing substance by reacting with the inorganic amorphous material. This is advantageous for improving the degree of the degree, and by adjusting the amount of the inorganic powder, the specific gravity of the composite cured product can be adjusted.
  • the inorganic powder at least one selected from calcium carbonate, calcium hydroxide, Shirasu, Shirasu balloon, perlite, aluminum hydroxide, silica, alumina, talc, calcium carbonate, and industrial waste powder can be used.
  • the industrial waste powder it is desirable to use at least one kind of industrial waste powder selected from calcined powder of papermaking sludge, grinding dust of glass, and grinding dust of silica sand. This is because the use of these industrial waste powders can reduce costs and contribute to solving environmental problems.
  • the inorganic powder obtained by calcining the papermaking sludge is obtained by subjecting the papermaking sludge to heat treatment at 3 ° C. to 150 ° C.
  • the inorganic powder obtained by pressing is amorphous, has excellent strength and toughness, and has a low density, so that it can be reduced in weight by dispersing it in a composite cured product.
  • the inorganic material obtained by quenching after heat treatment at 300 to 150 ° C is recommended.
  • the powder is advantageous because it certainly contains an inorganic amorphous material.
  • the inorganic powder desirably has a specific surface area of 1.6 to 100 m 2 / g. If it is less than 0.8 m 2 Z g, the contact area between the inorganic amorphous material and the inorganic powder becomes small, and the strength is reduced. If it exceeds g, the effect of crack propagation and improvement in hardness and other effects will be reduced, resulting in reduced strength. '
  • the inorganic powder may contain at least one or more inorganic substances selected from silica, ⁇ / remina, iron oxide, calcium oxide, magnesium oxide, oxidized rim, sodium oxide, and phosphorus pentoxide. desirable. These are chemically stable and have excellent weather resistance.
  • the average particle size of the inorganic powder is desirably in the range of 1 to 100 / im.
  • the content of the inorganic powder is desirably 10 to 90% by weight. That is, if the amount of the inorganic powder is too large, the strength is reduced, and if the amount of the inorganic powder is too large, the strength becomes fragile, and in any case, the strength is reduced.
  • a water absorption inhibitor including a water-repellent agent
  • a water absorption inhibitor may be added. That is, since the water absorption of the composite cured body is suppressed, a decrease in strength due to water absorption can be avoided. In addition, by suppressing the amount of water absorption, it is possible to repeatedly freeze and dissolve the absorbed water. Cracks can be prevented.
  • a water-absorbing inhibitor including a water-repellent agent
  • a water-repellent agent in an amount of 0.1% by weight or more, but if it exceeds 10% by weight, the strength of the composite cured product is increased.
  • 0.1 to 10% by weight is desirable, and 0.2 to 4% by weight is optimal.
  • the water-absorbing agent has a role and an effect of preventing water from entering the composite cured body.
  • rosin-based, paraffin (paraffin wax), reactive sizing agent, stearic acid System (calcium stearate), modified petroleum resin system, micro wax, silane system, polyvinyl chloride, polyvinyl acetate system, epoxy resin, urethane resin, styrene system, methacrylic acid system, starch system, polyimide system, polyester system, phenol Resin type, succinic acid type, etc. can be used.
  • the water absorption preventing agent may be added only to the force of uniformly dispersing in the composite cured product or to the surface layer of the composite cured product.
  • a predetermined amount is mixed and added uniformly at the time of compounding the raw materials, and the water absorption inhibitor is dispersed and molded.
  • a predetermined amount is applied to the surface of the composite cured product using a brush, a roll, a spray, or the like, and dried, heated and cured, and cured to form a coating film.
  • the reinforcing layer has a structure in which a fiber base material is embedded in a resin. It is particularly desirable to use a thermosetting resin for this resin. That is, unlike a thermoplastic resin, a thermosetting resin has excellent fire resistance and does not soften even at a high temperature, and thus does not lose its function as a reinforcing layer. Suitable thermosetting resins include phenolic resin, melamine resin, epoxy resin, polyimide resin, and urea resin. In order to provide the reinforcing layer with sufficient rigidity and impact resistance, and even higher fire resistance, the content of the thermosetting resin in the reinforcing layer should be in the range of 10% by weight to 65% by weight.
  • the fiber base material is a non-continuous fiber formed into a mat shape, or a continuous long fiber cut into 3 to 7 cm into a mat shape (a so-called chopped strand mat) and dispersed in water. It can be applied in the form of a sheet that has been rolled up in a sheet form, a sheet in which continuous lengths are spirally laminated to form a mat, or a sheet in which continuous long fibers are woven.
  • the thickness of the scavenging layer is desirably 0.2 mm to 3.5 mm. This is because, if it is set in this range, sufficient rigidity and impact resistance can be obtained, and high workability can be maintained.
  • a flame retardant such as aluminum hydroxide and magnesium hydroxide, and a generally used inorganic binder such as silica sol, alumina sol and water glass may be added.
  • the reinforcing layer desirably contains an elastic polymer. Cracking does not occur from the nail as a starting point even when the nail is hit, and the elastic polymer can secure the frictional force with the nail surface and improve the holding power of the nail.
  • a resin composition comprising a thermosetting resin and a hydrophilic polymer for imparting nail strength is desirable. That is, the emulsion of the elastic polymer is dispersed in the uncured thermosetting resin liquid. When such a resin cures, it becomes a structure in which "islands" of a hydrophilic polymer are dispersed in the "sea” of a thermosetting resin matrix, thereby ensuring the strength of the resin and imparting toughness. .
  • the elastic polymer is preferably a rubber-based latex, an acrylic-based latex, an acrylate-based latex, or a urethane-based latex. This is because these can be dispersed in a liquid state in an uncured thermosetting resin liquid. Since both the thermosetting resin and the elastic polymer are liquid, it is easy to impregnate the porous substrate with the fibrous substrate.
  • the rubber latex is preferably nitrile-butadiene rubber (NBR) and styrene-butadiene rubber (SBR).
  • the thermosetting resin is preferably a phenol resin, a melamine resin, an epoxy resin, a polyimide resin, or the like.
  • the weight ratio of the solid content of the thermosetting resin to the elastic polymer is desirably 95 Z5 to 65/35.
  • the reason for this is that if the amount of the thermosetting resin is too large, the toughness is reduced, cracks are easily generated, the retention of nails is reduced, and if the amount of the elastic polymer is too large, the resin strength is reduced. As a result, the holding power of the nail decreases. As described above, the holding force of the nail is optimal when the weight ratio of the solid content of the thermosetting resin to the elastic polymer is 9555 to 65/35 force.
  • a composite cured body is used as a core material, and a decorative layer is provided on at least one side thereof. You may have.
  • the decorative layer used is melamine resin paint, melamine resin impregnated paper, polyester resin paint, diaryl phthalate resin impregnated paper, UV curable resin paint, vinyl chloride resin film, urethane resin paint, polyacryl urethane, fluorine resin
  • At least one resin-based decorative layer selected from resin film, decorative board, natural wood veneer (rose, teak, pine, ash, oak, cedar), natural stone, artificial stone, carpet, vinyl chloride tile, cloth carpet, Decorative plywood, tatami mats, etc. can be used.
  • the decorative board has a three-layer decorative board consisting of a phenolic resin-impregnated core layer, a melamine resin-impregnated pattern layer, and a melamine resin-impregnated overlay layer.
  • a decorative board with a four-layer structure consisting of a layer and a melamine resin-impregnated overlay layer can be used.
  • the surface strength is significantly increased, and thus it can be applied to flooring and the like.
  • the thickness of this decorative layer is desirably 0.1 to 10 mm.
  • the method for producing a composite cured product is as follows.
  • papermaking sludge is used as a raw material for the composite cured product. Papermaking sludge is discharged when printing and information paper, kraft paper, titanium paper, tissue paper, dust paper, toilet paper, sanitary products, towel paper, industrial hybrid paper, and household hybrid paper are manufactured. It is desirable to use papermaking sludge. As the commercially available paper sludge, “cyclone ash” and “raw sludge” handled by Maruto Kiln Co., Ltd. can be used. This papermaking sludge has a large amount of calcium compound, and it is easy to obtain Ca-based crystals by hardening.
  • This papermaking sludge is poured into a desired formwork, or into a formwork with a filter, and then pressed to remove water, or by making a papermaking sludge slurry. Perform molding. Then, after molding, the composite cured product is obtained by drying and curing at a heating temperature of 20 to 160 ° C. If the heating temperature is too high, deformation or cracks may occur, while if it is too low, a long time is required for drying and productivity may be reduced.
  • the papermaking sludge is conveyed by a conveyor, pressed down by a mouth to form a sheet-shaped molded product, and the sheet-shaped molded product is heated to a temperature of 80 to 160 ° C. Pressing while heating with to form a plate-shaped core material.
  • the pressure at this time is suitably 0.1 to 4 OMPa (1 to 400 kgf Zc m 2 ).
  • OMPa 1 to 400 kgf Zc m 2
  • pressing means maintaining pressure.
  • the fibrous material is oriented in a direction crossing the pressing direction by the pressure applied at the time of pressing, so that the bending strength of the core material can be improved.
  • pressurization removes water and suppresses the progress of crystallization, and is therefore advantageous for forming an amorphous body.
  • a pressing plate is pressed using a push rod with a small cross-sectional area even for a composite hardened body for mass production having a large area. For this reason, if the push plate is inclined, the specific gravity varies. Also, if the roll is used for a long time, it will be worn and cause a variation in specific gravity.
  • a method of pressing the push plate with a plurality of push rods is employed to prevent pressure variations in the surface.
  • variation in specific gravity was suppressed to within ⁇ 10%.
  • the inorganic powder can be dispersed in the composite cured product by adding and mixing the inorganic powder to the papermaking sludge and then heating and curing.
  • a metal alkoxide / metal hydroxide can be used as a raw material.
  • a mixture of Al, Si, and Ca alkoxides and hydroxides is mixed with pulverized material obtained by pulverizing waste paper, followed by hydrolysis and condensed reaction in the presence of acid or alcohol.
  • the sol may be dried and cured to form a gel.
  • Such Genore is consequently A 1 2 O 3, S i O 2, C a O, N a 2 O, Mg O, P 2 0 5, S0 3, K 2 0, T i 0 2, MriO estimates that a solid solution or hydration oxides such as F e 2 0 3 and Z n O becomes the same as the compound obtained.
  • Japanese Patent Application Laid-Open No. 49-86438 discloses a hot-pressed mixture of pulp pulp (senorelose component) and lime gas.
  • pulp residue means cellulose, and does not use inorganic components in papermaking sludge as in the present invention, and does not mean fibers dispersed in inorganic amorphous. For this reason, fracture at the grain boundaries of limescale and crack propagation cannot be prevented, and problems remain in bending strength and compressive strength.
  • limescale is a crystalline substance (calcium oxide) obtained by burning paper pulp liquor, and is clearly distinguished from the amorphous substance of the present invention. .
  • JP-A-7-47537, JP-A-7-69701, JP-A-6-293546 and JP-A-5-270872 each disclose a technique in which cement and an inorganic reinforcing fiber are combined.
  • Japanese Patent Application Laid-Open No. 491-2880 discloses a technique for mixing norpsludge and crystalline gypsum, and a technique focusing only on the fibers in pulp waste, and Japanese Patent Application Laid-Open No. 53-81388 discloses a pulp residue.
  • a mixture of the fiber (20% fiber, 0.011% earth and sand) and wood chips is described, respectively. It is different from a substance dispersed.
  • Japanese Patent Application Laid-Open No. 51-30088 describes a technique for forming baked ash of pulp waste and a lightweight inorganic material, but does not describe calcination conditions and the like. You cannot get ash.
  • Japanese Patent Application Laid-Open No. 8-246400 discloses a technique that uses waste paper pulp itself instead of papermaking sludge.
  • JP-A-48-44349 discloses a technique in which pulp waste containing an organic substance and an inorganic substance is mixed with a polymer emulsion, etc., and the inorganic substance includes silicon oxide, aluminum oxide and iron oxide.
  • Japanese Patent Application Laid-Open No. 49-99524 discloses a ceramic (polycrystalline) base material, which is different from an amorphous base material as in the present invention.
  • Japanese Patent Application Laid-Open No. 55-12853 discloses that papermaking sludge such as old newspaper is depressed by wire pressing, dried by a drier and finally hot pressed.
  • JP-A-52-90585 discloses a cured product obtained by paraffin-coating the surface of a cured product of papermaking sludge.
  • Japanese Patent Application Laid-Open No. 50-101604 discloses a cured product obtained by mixing papermaking sludge and glass fiber. Have been.
  • Japanese Patent Publication No. 57-19019 discloses a hardened paper sludge containing Si-Ai crystal.
  • the composite cured product used in the present invention is produced as follows.
  • papermaking sludge is conveyed on a conveyor and pressed by rolls to form a sheet-like molded body.
  • the fiber base material is impregnated with resin, heated at 25 to 70 ° C., and dried to obtain a reinforcing sheet.
  • the sheet-shaped molded body and the reinforcing sheet are laminated and pressed together with heating to form an acoustic equipment support plate comprising a core material (composite cured body) and a reinforcing layer.
  • the heating temperature is suitably about 80 to 200 ° C. and the pressure is about 0.1 to 40 MPa (1 to 400 kgf / cm 2 ).
  • the objects can be oriented to increase the bending strength, and since the water can be removed by applying pressure, it is possible to prevent water from being taken in and excessively progressing crystallization.
  • a mat of inorganic fibers is impregnated with the resin composition and dried, and then heated and pressed to cure the thermosetting resin to form a reinforcing layer, and this reinforcing layer is used as an adhesive. May be applied to the core material that has been cured in advance.
  • a papermaking method a hardened body is manufactured by making a paper using a mesh-shaped rotating drum, and impurities are dropped from the mesh. It is possible to increase the brightness. Also, a cured product containing calcium carbonate,
  • the lightness of the cured product can be set to N4 or more as a value based on the provisions of JIS Z8721.
  • -JISZ8721 sets the ideal black lightness to 0 and the ideal white lightness to 10, and perceives the brightness between these black lightness and white lightness.
  • Each color is divided into 10 so as to have a uniform rate, and is indicated by symbols N0 to N10.
  • the actual lightness measurement is contrasted with the color chart corresponding to N0-N10. In this case, the first place of the decimal point shall be 0 or 5.
  • the lightness of the stiff dangling body can be set to N4 or more by a value based on the provisions of JIS Z8721, so that coloring and decoration can be applied.
  • a system as shown in Fig. 6 is used.
  • a papermaking sludge is adjusted, a raw material adjustment mechanism 10 that produces slurry 14, a papermaking mechanism 20 that forms paper 26 from slurry 14, and a papermaking mechanism 26 that is inverted.
  • a press machine 50 for pressurizing and dehydrating the paper 26 and a dryer 60 for drying and curing the pressed paper.
  • water is added, and conversely, the water is reduced in the pump 17 to adjust the concentration.
  • the slurry 14 having the adjusted concentration is formed into a paper by a paper machine 20.
  • a plurality of wire cylinders 22 A, 22 B and 22 C are immersed in a bathtub for papermaking, and the papermaking body 26 without papermaking is transferred to the conveyor belt 23.
  • the transferred paper body 26 is suction-dehydrated in the suction box 24 and further transferred to the making roll 30. After being further multilayered by a making roll, it is peeled off from the making roll and cut with a cutter as needed.
  • the cut sheet is put into a concave mold 54 and pressed by a plurality of divided convex molds 52 to be dewatered.
  • drying is performed by a dryer 60 having a heater 62 and a fan 64.
  • thermosetting resin such as a polyester resin
  • a fiber base made of these fibers is laminated on a sheet-like molded body, and heated and pressed.
  • This method of coating the fiber surface with a thermosetting resin in another layer is advantageous because the adhesion to the impregnated resin is improved, the fibers are easily bonded to each other, and the resin impregnation rate can be improved. It is.
  • Examples of such a coating method include a method of impregnating the above-mentioned fiber base material with an uncured thermosetting resin and drying it, or a method of flowing a raw material melt of glass fiber, rock wool, and ceramic fiber from a nozzle, There is a method in which fibers are formed by a blowing method or a centrifugal method, and a solution of a thermosetting resin such as a phenol resin is sprayed simultaneously with the formation of the fibers.
  • the decorative board is a three-layer decorative board consisting of a phenolic resin impregnated core layer, a melamine resin impregnated pattern layer, and a melamine resin impregnated overlay layer, a melamine resin impregnated backing layer, a phenol resin impregnated core layer, and a melamine resin impregnated pattern.
  • Layer, melamine resin A four-layer decorative board consisting of an impregnated overlay layer can be used.
  • the surface strength is significantly increased, and thus it can be applied to flooring materials and the like.
  • high quality wood such as cedar and cypress can be used as the decorative veneer.
  • thermosetting resin for example, at least one thermosetting resin selected from phenol resin, melamine resin, epoxy resin, and urea resin is applied to the surface of the composite cured body. May be.
  • the composite cured product used in the present invention may have an electromagnetic wave shielding layer formed on its surface or inside.
  • This electromagnetic wave shielding layer is advantageously made of a metal foil. In addition to absorbing, it is also high strength and lightweight and has excellent workability.
  • Metal foils include aluminum foil, copper foil, zinc foil, stainless steel foil / gold foil, At least one selected from silver foil. The thickness of the metal foil is 10-500 ⁇ m.
  • the conductive shield layer may be a composite sheet made of a conductive filler and a resin. Such a sheet is advantageous because it also absorbs sound and vibration.
  • the conductive filler included in this sheet is, for example, at least one powder selected from iron, copper, aluminum, stainless steel, brass, zinc, carbon, and the like.
  • the resin is preferably at least one selected from phenolic resins, epoxy resins, urethane resins, urea resins, polyester resins, polypropylene resins, and polyethylene resins.
  • the thickness of the composite sheet is preferably 0.5 to 5. Omm.
  • the conductive shield layer may be a layer coated with a conductive paint.
  • the conductive shield layer may be at least one of the front surface and the back surface of the composite cured body, and may be embedded in the lower part. Since a decorative layer is formed on the front surface, it is optimal to form the decorative layer on the back surface.
  • the specific gravity was measured on 45 small pieces by dividing a cured product having an area of 180 mm x 1000 mm into a 200 mm opening. The measurement was calculated from the weight and the external volume. The average specific gravity was 1.16, maximum 1.19, minimum 1.12. Therefore, the variation was 3.4%.
  • composition of MaiNaru sludge was analyzed using a fluorescent X-ray analyzer (R ig W aku made RIX 2 100), were as follows in terms of each oxide fa
  • the average particle diameter was 11.0 m
  • the true specific gravity was 2.756
  • the specific surface area was 19.0 m 2 Zg.
  • the average specific gravity was 0.80, maximum 0.85, minimum 0.75. Therefore, the variation was + 6.3%.
  • the average specific gravity was 0.50, maximum 0.53, and minimum 0.43.
  • the variance was therefore 14%.
  • the composite cured products obtained in the above Examples 1 and 2 and Comparative Example were placed on a tatami mat, and a speaker (made by AIWA) was placed on the tatami mat, and a speaker was placed on the tatami mat to listen to the four speakers.
  • the sound was muffled when placed on the composite effect body of the comparative example and when placed directly on the tatami mat.
  • the audio equipment support plate of the present invention when it was placed on the audio equipment support plate of the present invention, the sound was clear.
  • the detailed mechanism is unknown, in tatami mats and the like, the vibration of the speaker itself becomes sound and interferes with the sound from the speaker, or the vibration of the speaker's sound is modulated by the vibration of the speaker itself.
  • the composite cured body of the present invention can absorb the vibration of the speaker itself, it is assumed that there is no sound interference or frequency modulation. With a composite cured product having a specific gravity of less than 0.6, such an effect is not recognized. This is probably because the earthquake could not be absorbed.
  • Unfired papermaking sludge papermaking sludge of Mino Paper Co., Ltd. handled by Maruto Kiln Co., Ltd .: solid content 34% by weight, water content 66% by weight
  • acid washing was performed using 2 IM hydrochloric acid aqueous solution to remove the Ca component almost completely, and this was used as papermaking sludge A.
  • the amount of calcium carbonate is 55 weight 0 /.
  • the amount of calcium carbonate is 55 weight 0 /.
  • Pulp 1 6 S i 0 2: 2.
  • the amount of calcium carbonate was 65% by weight.
  • Samples were prepared by appropriately mixing A, B, and C as described above, and the paper was prepared using the apparatus shown in FIG.
  • the wire cylinder is # 60
  • the diameter is 70 cin
  • the width is lm
  • the rotation speed is 60 rotations Z
  • the belt transfer speed is 48 mZ
  • the making drum is 64 cm in diameter.
  • the solid content of the raw material is 5%.
  • the size of the press mold was 1800 mm ⁇ 1000 mm. Also, 45 push rods with a 190 mm mouth were used.
  • the cured product was manufactured, and the bending strength, compressive strength ', nail pull-out strength, lightness, and rupture toughness were measured, and the results were shown in graphs (Figs. 7, 8, 9, and 10).
  • the rupture toughness peaks at 3 to 6% by weight in CaO conversion.
  • the nail pull-out strength is based on 20 kg / cm, but is in the range of 4 to 63% by weight in terms of CaO. The same tendency is seen in bending strength and compressive strength. Further, C a OZS i 0 2 weight ratio 0. 2 ⁇ 7. 9, C aO / A l 2 0 3 of Weight ratio 0.2 to 12.
  • N 4.0 or more can be achieved, and a cured product that is easy to decorate is obtained.
  • the variation in specific gravity was between 14.0 and +4.8.
  • the crystal structures of the composite cured products of Example 1 and Example 2 were confirmed by T and X-ray diffraction.
  • the X-ray diffraction charts are shown in FIGS. 3 and 4, respectively.
  • a gradual undulation (halo) is observed in the region of up to 30 °, and a peak indicating the crystal structure is also observed, indicating that the crystal structure is mixed in the amorphous structure.
  • the crystalline calcium carbonate (Calsite), Kao Unite, crystal of S i 0 2 were identified.
  • the content of calcium carbonate was 9.8% by weight in terms of the converted cured product. Possibility of industrial use
  • the audio equipment support of the present invention can improve sound quality.

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Abstract

La présente invention concerne un plateau de support pour équipement audio, caractérisé en ce qu'il est produit selon un procédé qui consiste à faire durcir une boue servant à la fabrication du papier et en ce qu'il comprend une matière inorganique amorphe, qui contient au moins un oxyde, choisi parmi les oxydes de Si, Al et Ca et mélangé à une matière fibreuse. Ce plateau de support pour équipement audio permet d'apporter une amélioration à la qualité sonore.
PCT/JP2001/004897 2000-06-09 2001-06-11 Plateau de support pour equipement audio WO2001095664A1 (fr)

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JP2000173872 2000-06-09
JP2000-173872 2000-06-09

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008034909A (ja) * 2006-07-26 2008-02-14 Pioneer Electronic Corp スピーカー装置用構成部材及びスピーカー装置
EP3388574A4 (fr) * 2015-12-10 2019-07-31 Sumitomo Bakelite Co.,Ltd. Corps de formation de feuille ignifuge, procédé de production de produit de feuille formée ignifuge, et procédé de production de corps de formation de feuille ignifuge

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0453082A (ja) * 1990-06-20 1992-02-20 Aisin Takaoka Ltd 音響機器用置台

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0453082A (ja) * 1990-06-20 1992-02-20 Aisin Takaoka Ltd 音響機器用置台

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008034909A (ja) * 2006-07-26 2008-02-14 Pioneer Electronic Corp スピーカー装置用構成部材及びスピーカー装置
EP3388574A4 (fr) * 2015-12-10 2019-07-31 Sumitomo Bakelite Co.,Ltd. Corps de formation de feuille ignifuge, procédé de production de produit de feuille formée ignifuge, et procédé de production de corps de formation de feuille ignifuge

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