JP3101019B2 - Construction materials - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[Object of the invention]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction material such as a floor plate, a wall plate, etc., having a vibration-proof, sound-proof and electromagnetic wave shielding effect.

[0002]

BACKGROUND OF THE INVENTION As houses become denser, more complex, and higher-grade houses, vibration and soundproofing measures are required in each house and each room, and a felt layer and a honeycomb structure layer for sound absorption and buffering are required. There are also high-grade floorboards lined with lining.
On the other hand, electronic devices to which digital circuits are applied are rapidly spreading, and these are used not only in homes but also in various places such as automobiles, airplanes, trains, and communication facilities. It has become. In addition, as various types of measuring equipment have become more accurate, vibration proofing, electromagnetic wave shielding, and the like in a measuring environment have been required at a higher level.

[0003]

[Technical matters that we attempted to develop] Therefore, the present invention
An object of the present invention is to obtain building materials such as floorboards and wallboards, which have soundproofing and electromagnetic wave shielding effects.

[0004]

Configuration of the Invention

[Means of Achieving the Object] That is, the construction material according to the first invention of the present application is a viscoelastic material for matting fibers of long metal fibers.
By being impregnated with the substance, it is characterized in that it is adhered to the construction board by virtue of the tackiness of the viscoelastic substance.

[0005] In addition, the construction material according to the second invention of the present application is such that, in addition to the above, the long metal fiber is obtained by turning a long metal foil from an end face of a cylindrical body wound in a coil shape. It is characterized by.

[0006]

Since the construction material of the present invention is basically formed by laminating a construction board and a mat-like layer of long metal fibers, the long metal fibers are formed in a mat shape. In addition, soundproofing properties, electromagnetic wave shielding properties, and the like are also exhibited in construction materials. In other words, the conductivity of the long metal fiber laminated so as to be stretched around the construction board prevents electromagnetic waves from leaking out or entering from the outside, and its bulkiness, distortion and deformation cause vibration and sound insulation. Equal, and
By impregnating the viscoelastic substance to make the fibers entangled ,
Due to the vibration damping property, a material that also exhibits a higher vibration damping effect can be obtained. In addition, if a long metal foil wound around a long metal foil in a coil shape and turned from the end face is used, this can be easily and inexpensively manufactured. Is obtained.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a viscoelastic material according to an embodiment of the present invention. First, the metal filaments will be specifically described. As one type, there is a monofilament in the form of a single filament, and in addition to a tow in which filaments are bundled, a filament in the form of a short fiber is twisted into a filament. The fiber length is desirably about several cm to several tens cm, or more. In addition, the material can be selected from appropriate metals such as iron, stainless steel, copper, brass, brass, aluminum, and lead, but the conductivity is high,
Those that are resistant to corrosion are more desirable.

[0008] The following method is used as a method for producing long metal fibers. That is, first of all,
By pressing a blade with a wide width against the end face of a cylindrical body in which a thin band-shaped metal foil is rolled into a roll, the metal foil is continuously cut from the end face by rotating the cylindrical body around the axis in this state There are ways to go. Incidentally, this method is disclosed in
This method is described in detail in Japanese Unexamined Patent Publication No. 3231. According to this method, it is possible to efficiently produce long metal fibers, and to produce long metal fibers with high flexibility and less burrs at low cost. The thickness of the metal foil in this case depends on the material, hardness, etc., but is suitably several μm to several hundreds μm, preferably about several tens μm. Of course, by adjusting various conditions such as a cutting speed, a feed speed, a cutting width, and a rake angle of a cutting tool according to the metal foil, an optimum long metal fiber can be obtained. Of course, it is not necessary to be limited to this method, and it is only necessary that the method is obtained in a thin, long, fibrous state.
As another manufacturing method, a molten metal may be extruded from a die and cooled to obtain a monofilament long metal fiber.

In the present invention, a metal long fiber entangled in a mat shape is used. In order to obtain a mat-like layer, if long metal fibers are obtained as aligned, for example, after loosening this once, each fiber is re-arranged again, needle-punched and entangled, etc. Almost the same method can be adopted as in the production of non-woven fabric using synthetic fibers. When loosening and rearranging, for example, a rake-shaped hooking member, between rolls, between weirs, or the like is passed. In addition, the thickness of the mat-like layer is about several mm to several cm, or more,
The degree of dispersion is determined by the required performance as a construction material, that is, the required degree of vibration proofing, soundproofing, and electromagnetic wave shielding.

[0010] The construction board referred to in the present application is not only a wooden floorboard or a wallboard having a decorative surface as an interior material in a building material, but also a wooden material, a plaster, other non-combustible materials, a synthetic material, or an exterior material. Including resin boards, insulation boards, etc.
Further, it also includes materials for working used for making speaker boxes, cabinets and the like.

In the present invention, the above-mentioned mat-like layer of long metal fibers is used by being laminated on a construction board. The mat-like layer of long metal fibers is impregnated with a viscoelastic substance so that the fibers are impregnated.
This viscoelastic substance will be described below because it is used as an entangled state .

First, a silicone gel suitable as the viscoelastic substance is silicone gel. Silicone gel, for example undiluted serving diorganopolysiloxane silicone gel represented by the following formula [1] (hereinafter referred to as component ^{_{A): RR 1 2 SiO- (R}} 2 2 SiO) n SiR 1 2 R ... [1] [ Here, R is an alkenyl group, R ¹ is a monovalent hydrocarbon group having no aliphatic unsaturated bond, and R ² is a monovalent aliphatic hydrocarbon group (at least 50 mol% of R ² ).
Is a methyl group, and when it has an alkenyl group, its content is 10 mol% or less), and n is a viscosity of the component at 25 ° C. of 100 to 100,000 cSt.
And a viscosity at 25 ° C. of 50
00 cSt or less, and at least two S
Organohydrogenpolysiloxane (B) which is a stock solution of a silicone gel having a hydrogen atom directly bonded to an i atom
Component), and the ratio (molar ratio) of the total amount of alkenyl groups contained in component A to the total amount of hydrogen atoms directly bonded to Si atoms in component B is 0.1 to 2.2.
An addition reaction type silicone polymer obtained by curing a mixture adjusted to be zero.

The silicone gel will be described in more detail. The component A has a linear molecular structure, and alkenyl groups R at both ends of the molecule are added to hydrogen atoms directly bonded to Si atoms in the component B. Is a compound capable of forming a cross-linked structure. The alkenyl group present at the molecular terminal is preferably a lower alkenyl group, and a vinyl group is particularly preferable in consideration of reactivity. R ¹ present at the molecular terminal is a monovalent hydrocarbon group having no aliphatic unsaturated bond, and specific examples of such a group include alkyl groups such as a methyl group, a propyl group, and a hexyl group. , A phenyl group and a fluoroalkyl group. In the above formula [1], R ² is a monovalent aliphatic hydrocarbon, and specific examples of such a group include alkyl groups such as methyl group, propyl group and hexyl group, and vinyl groups. Lower alkenyl groups. Provided that at least 50 of R ²
The mol% is a methyl group, and when R ² is an alkenyl group, the alkenyl group is preferably in an amount of 10 mol% or less. When the amount of the alkenyl group exceeds 10 mol%, the crosslinking density becomes too high and the viscosity tends to be high. And n
The viscosity of the component A at 25 ° C. is usually 100 to
100,000 cSt, preferably 200-20,000
It is set to be within the range of cSt.

The component B is a crosslinking agent for the component A,
The hydrogen atom directly bonded to the i atom is added to the alkenyl group in the component A to cure the component A. The B component may have any of the above-mentioned effects, and may have various molecular structures such as a linear, branched chain, cyclic, or network structure. In addition, a hydrogen atom and an organic group are bonded to the Si atom in the B component, and this organic group is usually a lower alkyl group such as a methyl group. further,
The viscosity of the component B at 25 ° C. is usually 5,000 cSt or less, preferably 500 cSt or less. Such B
Examples of the component include an organohydrogenpolysiloxane in which both molecular terminals are blocked with a triorganosiloxy group,
Copolymers of diorganosiloxane and organohydrogen polysiloxane, copolymer polysiloxane consisting of tetra organo tetra hydrogen cyclotetrasiloxane, HR ¹ ₂ SiO1 / ₂ units and SiO 4/2 units, and HR ¹ ₂ can be mentioned copolymers polysiloxane SiO 1/2 units and ^R ₁ 3 SiO1 / 2 units and SiO 4/2 units. However, in the above formula, R ¹ has the same meaning as described above. The ratio of the total molar amount of alkenyl groups in component A to the total molar amount of hydrogen atoms directly bonded to Si in component B is usually 0.1 to 0.1.
It is manufactured by mixing and curing the A component and the B component so as to be in the range of 2.0, preferably in the range of 0.1 to 1.0.

The curing reaction in this case is usually performed using a catalyst. As the catalyst used herein, a platinum-based catalyst is preferable, and examples thereof include finely pulverized elemental platinum,
Examples thereof include chloroplatinic acid, platinum oxide, complex salts of platinum and olefins, platinum alcoholates, and complex salts of chloroplatinic acid and vinyl siloxane acid. Such a complex salt is composed of A component and B component.
It is used in an amount of usually at least 0.1 ppm (amount in terms of platinum, the same applies hereinafter), preferably at least 0.5 ppm, based on the total weight of the components. The upper limit of the amount of such a catalyst is not particularly limited. For example, when the catalyst is in a liquid state or when it can be used as a solution, 200 p.
pm or less is sufficient.

Then, the above-mentioned A component, B component and the catalyst are mixed and cured at room temperature or by heating to form the silicone gel used in the present invention. When curing by heating, the heating temperature is usually 50
１６０160 ° C. The silicone gel thus obtained is JIS (K2207-1980, 50 g load)
Has a penetration of usually from 5 to 250. The hardness of such a silicone gel varies depending on the crosslinked structure formed by the above-mentioned component A and component B. The viscosity before curing and the penetration after curing of the silicone gel can be determined by previously adding a silicone oil having methyl groups at both ends in an amount within the range of 5 to 75% by weight based on the obtained silicone gel. Can be adjusted. The silicone gel can be adjusted as described above, or a commercially available silicone gel can be used. Examples of commercially available products that can be used in the present invention include CF502
7, TOUGH-3, TOUGH-4, TOUGH-
5, TOUGH-6, TOUGH-7 (manufactured by Toray Dow Corning Silicone) or X32-902 / cat1
300, KE1308 / cat1300-L4 (manufactured by Shin-Etsu Chemical Co., Ltd.), F250-121 (manufactured by Nippon Yunika Co., Ltd.) and the like.

Further, in addition to the above-mentioned components A, B and the catalyst, a pigment, a curing retarder, a flame retardant, a filler and the like can be blended within a range that does not impair the properties of the silicone gel.
Furthermore, in order to enhance vibration proofing, cushioning, etc., a silicone gel mixed with a fine hollow sphere filler may be used. For such a filler material, Philite (registered trademark) manufactured by Nippon Philite Co., Ltd. Examples include Expancel (registered trademark) and Matsumoto Microsphere (manufactured and sold by Matsumoto Yushi Seiyaku Co., Ltd.).

In addition, a filler having conductivity may be mixed therein, such as carbon black, carbon fiber, graphite, metal powder, metal oxide, metal flake, metal fiber, etc. Organic and inorganic fine particles are plated or coated with a conductive substance such as nickel, cobalt, gold, or silver. If a silicone gel containing such a conductive filler is impregnated into a mat-like layer of long metal fibers and cured, the electromagnetic wave shielding effect is significantly improved.

In addition to the above-mentioned silicone gel, a polybutadiene gel is also suitable as a viscoelastic substance. As a specific example, Poly b manufactured and sold by Idemitsu Arco Co., Ltd.
There is dR-45HT. This is a polybutadiene-type liquid polymer having a highly reactive hydroxyl group at the molecular end, and is easily cured by isocyanates to form a good viscoelastic body like ordinary polyurethane. The polybutadiene gel has excellent water resistance, chemical resistance, and electrical properties because the main chain is composed of only hydrocarbons, and also has good low-temperature properties because the skeleton has 1,4 bonds. . In addition, there is an advantage that processing is easy because of the liquid state, and continuity can be easily performed. Then, after appropriately adding various compounding agents and performing primary mixing, a curing agent is added and secondary mixing is performed, and impregnation, sheet molding and the like are used.

The compounding agents include carbon black, silica, alumina and calcium carbonate as fillers for strength, hardness and heat resistance, and process oil and asphalt as extenders for adjusting viscosity. There is dibutyltin dilaurate as a catalyst for adjusting the temperature, and as a heat resistance improving and antioxidant, Irganox 565 manufactured by Ciba Geigy Co., Ltd., Knocklac NS-6 manufactured by Ouchi Shinko Chemical Co., Ltd. As an ultraviolet absorber, there is Tinuvin 327 manufactured by Ciba Geigy Co., Ltd., as a flame retardant, there are aluminum hydroxide, borax, chlorinated paraffin, and antimony oxide. As a curing agent, there is lylene diisocyanate or methylene diisocyanate. In addition, the fillers can of course be mixed.

For example, as a preferred example, the above R
100 parts of -45HT, 0.005 part of TAS750 manufactured by Shin-Etsu Silicone Co., Ltd. as an antifoaming agent, 0.005 part of DBTDL KS-1260 manufactured by Kyodo Yakuhin as a catalyst, and Nippon Polyurethane Industry Co., Ltd. as a curing agent Company made Millionate MR-200 (NCO
8.3 parts), and 1 part of Microsphere F-80ED manufactured by Matsumoto Yushi Seiyaku Co., Ltd. as micro hollow spheres. Stir and mix well at room temperature, then add the curing agent, and further stir and mix to obtain a uniform liquid,
After defoaming under reduced pressure , on the mat-like layer of long metal fibers
Pour out the liquid material before curing, and then
Heat curing by passing through a heating tunnel while passing between rolls
Thus, a sheet of long metal fibers impregnated with polybutadiene gel can be obtained. The sheet of long metal fiber impregnated with the polybutadiene gel thus obtained is
Since it has a buffering property close to that of the silicone gel and is relatively inexpensive than the silicone gel, it is suitably used for the construction material of the present invention.

Next, the construction material of the present invention will be described with reference to the illustrated embodiment. FIG. 1 shows a longitudinal section of an example of a construction material. In this example, a mat-like layer of long metal fibers is laminated on a so-called decorative plywood as a construction board.
That is, 1 is a decorative plywood plate, 11 is a decorative surface, and a mat-shaped layer 2 of a long metal fiber is adhered to a back surface 12 thereof to be integrated. FIG. 2 shows an example of another construction material.
In this example, veneer plates 1 and 3 are bonded to the upper and lower surfaces of a mat-like layer 2 of long metal fibers, one of which has a decorative surface 11 and the other is 3 thinner. It does not have a cosmetic surface. FIG.
Is a longitudinal section of the embodiment of the present application, in which a layer of a viscoelastic substance is laminated, and in this example, as a sheet mat-shaped layer 4 of a long metal fiber impregnated with the polybutadiene gel, this is used for the decorative veneer board 1. Laminated.

In impregnating the mat-like layer of long metal fibers with a viscoelastic substance such as polybutadiene gel or silicone gel, the uncured stock solution is placed on the mat-like layer of long metal fibers. After that, it is possible to employ a technique of hardening by flowing through a heating tunnel while passing between the upper and lower rolls. In bonding the layers, the layers are viscously adhered by the tackiness of the viscoelastic substance. Further, in the above embodiment, the mat-shaped layer of the long metal fiber is assumed to be a flat layer having a uniform thickness as a whole, but the present invention is not limited to this, and the mat-shaped layer is formed by an appropriate pattern. It is a matter of course that the surface may be provided with irregularities, so-called emboss. In addition, the whole is appropriately sized, for example, 30 cm.
It is a tile shape of × 30 cm etc., and it is used by fitting it to each other, and on the back part, there is a part where a mat-like layer of long metal fiber is not laminated to fix it to the bone tree such as the floor. There may be.

[0024]

The construction material of the present invention is supplied to a control room,
If it is used as a plate material for computer rooms, living rooms, study rooms, etc., as well as for speaker boxes and cabinets, vibration-damping is achieved by mat-like fibers of metal long fibers and viscoelastic materials impregnated in them. In addition, soundproofing and electromagnetic wave shielding effects are exhibited, and there is no need to worry about vibration, noise problems and electromagnetic wave interference.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an example of a construction material for explaining a construction material of the present invention.

FIG. 2 is a longitudinal sectional view showing an example of another construction material for explaining the construction material of the present invention .

FIG. 3 is a longitudinal sectional view of one embodiment of the construction material of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Decorative veneer board 11 Decorative face 2 Matt-like layer of long metal fiber 3 Veneer board 4 Sheet mat-like layer of long metal fiber impregnated with polybutadiene gel

────────────────────────────────────────────────── ─── Continued on the front page (51) Int.Cl. ⁷ identification code FI H05K 9/00 H05K 9/00 W (58) Fields investigated (Int. Cl. ⁷ , DB name) E04B 1/92 B32B 7 / 02 B32B 15/02 E04F 15/18 H05K 9/00

Claims (2)

(57) [Claims] 1. A construction material characterized in that mat-like fibers of long metal fibers are impregnated with a viscoelastic substance and are adhered to a construction board by virtue of the tackiness of the viscoelastic substance. 2. The construction material according to claim 1, wherein the long metal fiber is turned from an end face of a cylindrical body in which a long metal foil is wound in a coil shape.