JP2019128020A - Vibration restricting material and vibration restricting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration damping material having excellent workability and vibration damping property. SOLUTION: A first fiber layer made of a fiber aggregate, a first adhesive layer containing a thermoplastic resin, and a first soft layer made of a resin film are formed on one surface of a vibration damping layer containing asphalt. Are sequentially laminated to prepare a damping material. The average thickness of the resin film may be 200 μm or less. The resin film may be a polyester film. The vibration damping material may further include a fixing layer for fixing to the vibration site on the first soft layer. The fixed layer may contain an adhesive component or an adhesive component. The vibration damping material may be a vibration damping material that is heated to 30 ° C. or higher in use. The vibration damping material may be a machine that generates vibration or a vibration damping material for fixing the vibration of the machine to a place where the vibration is propagated. [Selection diagram] None

Description

  The present invention relates to a damping material and a damping method for reducing vibration by installing the vibration source at various vibration sources or locations where the vibration propagates from the vibration sources.

  In transport machinery such as ships and vehicles, agricultural machinery such as tractors and rice mills, industrial machinery such as machine tools and bottling machinery, compressors, and household electrical machinery such as vacuum cleaners and air conditioners, vibration from the power source machine Noise that is generated and caused by this vibration is also generated. Therefore, in an environment where humans are involved in these machines, it is necessary to suppress vibrations by the machines and reduce vibrations and noises. As a method of reducing vibrations, the vibration source of the machine itself or the vibrations of the machine is required. There is known a method of fixing a damping material at a point where the vibration propagates.

In JP-A-2002-192676 (Patent Document 1), a moisture-proof moisture-proof layer made of a polyester resin film or a polyamide resin film, a sound absorbing layer made of a polyurethane resin foam, and a surface density of 1.5 There is disclosed a moistureproof soundproofing material which is composed of a laminated body in which sound insulation layers having a value of -3.5 g / cm ² are sequentially laminated and which can prevent the occurrence of condensation. In this document, a rubber sheet or an asphalt sheet is described as the sound insulation layer, and in the examples, a rubber sheet is used. Moreover, in this document, piping of a compressor or an air conditioner is covered with the moistureproof soundproofing material to reduce noise, but as a method of fixing the moistureproofing soundproofing material to the piping, Magic Fastener (registered trademark) , A fixing method using a polypropylene band and a washer binding wire is described.

  However, this moisture-proof and soundproofing material has a complicated layer structure, requires a fixture, and has low workability.

  On the other hand, Japanese Patent Application Laid-Open No. 2016-186207 (Patent Document 2) discloses a soundproof material including a soundproof layer having a vibration damping layer, an adhesive layer containing a thermoplastic resin, and a hard layer containing metal or plastic. ing. In this document, in order to reduce the floor impact sound of a multi-story building, this soundproofing material is fixed to the floor finishing material constituting the horizontal floor with an adhesive and laid after use. Recyclability is improved by peeling off the floor finishing material. In the embodiment, a galvanized iron plate is used as the hard layer.

  However, this soundproofing material does not describe suppression of vibration by a machine. Furthermore, since the machine and its vibration propagation locations have various shapes, the soundproofing material is required to have flexibility to easily follow the shape. On the other hand, since the said soundproofing material is assumed to be laid under a horizontal floor, it is equipped with a hard layer, and it is difficult to make it follow according to the shape of a machine etc.

JP 2002-192676 A (Claims 1 and 3, paragraph [0038], Example) Japanese Unexamined Patent Publication No. 2016-186207 (Claim 1, Paragraph [0001], Example)

  Therefore, an object of the present invention is to provide a damping material excellent in workability and damping property, and a damping method using the damping material.

  Another object of the present invention is to provide a vibration damping material which can be easily and firmly fixed following vibration points of various shapes and which can maintain vibration damping property over a long period without peeling even when heated. The object is to provide a damping method using damping material.

  Still another object of the present invention is to provide a vibration damping material capable of improving vibration damping performance even with a thin structure and a simple structure, and a vibration damping method using the vibration damping material.

  Another object of the present invention is to provide a vibration damping material that is difficult to adhere dust and the like and has excellent handleability, and a vibration damping method using the vibration damping material.

  First, the inventors focused on asphalt having high vibration damping properties, and used an adhesive instead of the fixture of Patent Document 1, and used a general-purpose asphalt vibration damping material (a damping material in which the surface of the asphalt plate was coated with a nonwoven fabric). Although it was studied to fix the vibration material to the vibration location of the machine, it was found that the vibration damping material peels off due to the heat generated from the machine and the vibration damping performance decreases when the machine continues to operate. As a result of investigating the cause, it was found that the asphalt exuded through the nonwoven fabric deteriorates the adhesive ability of the adhesive layer. As is clear from the fact that asphalt is used as an adhesive and pressure-sensitive adhesive, the non-woven fabric is conventionally laminated on the surface of the asphalt board so as not to exhibit the stickiness (stickiness) of the asphalt. This is to improve workability and workability. Therefore, such knowledge (the knowledge that the function of the adhesive layer is reduced by the leaching of asphalt which is also an adhesive component) was surprising knowledge for the present inventors. Accordingly, the present inventors have found that both the workability and the vibration damping property can be achieved by adhering and fixing the vibration damping material to the vibration portion with a soft layer made of a resin film interposed therebetween, thereby completing the present invention.

  The damping material of the present invention comprises a damping layer containing asphalt, a first fiber layer laminated on one side of the damping layer and consisting of fiber aggregates, and the first fiber layer. A first adhesive layer that is laminated and includes a thermoplastic resin, and a first soft layer that is laminated on the first adhesive layer and made of a resin film are included. The resin film may have an average thickness of 200 μm or less. The resin film may be a polyester film. The vibration damping material may further include a fixing layer for fixing to a vibration location on the first soft layer, and the fixing layer may include an adhesive component or an adhesive component. The thermoplastic resin of the first adhesive layer may be a polyethylene resin. The fiber aggregate of the first fiber layer may be a polyester nonwoven fabric. The damping material is laminated on the other surface of the damping layer, and a second fiber layer made of a fiber assembly, and is laminated on the second fiber layer, and includes a thermoplastic resin. It may further include two adhesive layers and a second soft layer laminated on the second adhesive layer and made of a resin film. The vibration damping material may be a vibration damping material that is heated to 30 ° C. or higher in use. The vibration damping material may be a vibration damping material for fixing to a machine that generates vibrations or a place that propagates vibrations of the machine.

  The present invention also includes a method of suppressing vibrations derived from the vibration source by fixing the damping material via a fixed layer at a vibration source or a location where vibration is propagated from the vibration source. In this method, in use, the damping material may be heated to 30 ° C. or higher. The vibration source may be a machine.

  In this invention, since the damping layer containing asphalt is coat | covered with the soft layer which consists of a resin film, workability and damping property can be made compatible. Specifically, since the damping layer is covered with the soft layer through the fiber layer and the adhesive layer, the soft layer can be firmly laminated to the damping layer, and the soft layer and the vibration point are adhesive or pressure sensitive adhesive Damping material can be easily applied to the vibration location by fixing with. In addition, since the soft layer is flexible, it can be easily and firmly fixed following a vibration portion of various shapes such as a curved shape and a concavo-convex shape, and the asphalt can be made to have a vibration damping material and a vibration portion by the soft layer. Since it is possible to suppress exudation to the fixation site of the above, the damping property can be maintained for a long time without peeling even when heated. Furthermore, since asphalt with high damping performance is used, damping performance can be improved even with a thin structure with a simple structure. In particular, when soft layers are laminated on both sides of the vibration damping layer, it is difficult for dust and the like to adhere to the entire vibration damping material, and the handleability can be improved.

[Damping layer]
The asphalt contained in the vibration control layer is not particularly limited, and general asphalt such as natural asphalt (lake asphalt, rock asphalt, oil sand, asphaltite, etc.), petroleum asphalt (straight asphalt, blown asphalt, etc.), etc. Can be mentioned. These asphalts can be used alone or in combination of two or more.

  The penetration of asphalt (1/10 mm) can be selected from the range of about 0 to 300 in the method based on JIS K2207-1996, for example, 5 to 200, preferably 10 to 150, more preferably about 20 to 100. It is. If the penetration is too small, the followability to the vibration location may be reduced or cracked. On the other hand, if the penetration is too large, the workability may be reduced or it may be difficult to form a uniform thickness.

  The asphalt may be used as a modified asphalt by combining with a modifier. The modifier includes an organic modifier and an inorganic modifier.

  Examples of organic modifiers include polyolefins, vinyl polymers (eg, polyvinyl chloride, polyvinyl acetate, ethylene-vinyl acetate copolymer, ethylene-vinyl alcohol copolymer, ethylene-acrylic acid copolymer) , Ethylene-methyl acrylate copolymer, ethylene-ethyl acrylate copolymer, etc.), polyamide, polyester, synthetic rubber or thermoplastic elastomer (eg, polybutadiene, polyisoprene, styrene-butadiene copolymer, etc.), natural rubber And tackifiers (for example, terpene resins, rosin resins such as natural rosin and modified rosin, petroleum resins, modified olefin polymers and the like), fats and oils (for example, naphthenic raw material oils) and the like. These organic modifiers can be used alone or in combination of two or more. Of these organic modifiers, thermoplastic elastomers, tackifiers and fats and oils are preferred, and styrene-diene copolymers such as styrene-butadiene-styrene block copolymers are particularly preferred.

  Examples of inorganic modifiers include metal particles (powder) such as iron, copper, tin, zinc, nickel, and stainless steel; iron oxide, iron sesquioxide, iron trioxide, ferrite, tin oxide, zinc oxide, Metal oxide particles such as zinc oxide, copper oxide, aluminum oxide; metal salt particles such as barium sulfate, calcium sulfate, aluminum sulfate, calcium sulfite, calcium carbonate, calcium bicarbonate, barium carbonate, magnesium hydroxide; steelmaking slag, mica And mineral particles such as clay, talc, wollastonite, diatomaceous earth, silica sand and pumice powder; and inorganic fibers such as glass fibers and carbon fibers. These inorganic modifiers can be used alone or in combination of two or more. Of these inorganic modifiers, particulate modifiers such as iron particles, various iron oxide particles, steelmaking slag particles, and (heavy) calcium carbonate particles are preferable. The average particle diameter of the particulate modifier is about 0.01 to 0.5 mm (particularly 0.05 to 0.2 mm).

  The organic modifier and the inorganic modifier may be used in combination in order to improve the adhesion and the damping property. In the present invention, it is preferable to include at least an organic modifier from the viewpoint of improving adhesiveness.

  The mass ratio of asphalt and modifier can be selected, for example, from the range of asphalt / modifier = 100/0 to 1/99, for example, 60/40 to 5/95, preferably 40/60 to 8 /. 92, and more preferably in the range of about 20/80 to 10/90. When the modifier is an organic modifier, the mass ratio of the two is, for example, asphalt / organic modifier = 100/0 to 70/30, preferably 99/1 to 80/20, more preferably It is about 95/5 to 85/15. If the proportion of the modifying agent is too small, the modifying effect is not exhibited, and if it is too large, the viscosity increases and the processing becomes difficult, and the economic efficiency may be lowered.

  When the organic modifier and the inorganic modifier are combined, the mass ratio of the both can be selected, for example, from the range of about 99/1 to 1/99 of the organic modifier / inorganic modifier, Preferably it can be selected from the range of 60/40 to 1.5 / 98.5, more preferably 20/80 to 2/98.

  The damping layer may further contain a conventional additive as long as the damping property is not impaired. Additives include, for example, stabilizers (heat stabilizers such as copper compounds, ultraviolet absorbers, light stabilizers, antioxidants, etc.), fillers, thickeners, leveling agents, foaming agents, antifoaming agents, hard Flame retardants, plasticizers, antistatic agents, colorants, surfactants, dispersants, lubricants, crystallization rate retarders, lubricants, antibacterial agents, insecticides (anticides, acaricides, etc.), antiseptics (antibacterials) Mold agents, etc.), matting agents, heat storage agents, fragrances, fluorescent whitening agents, wetting agents and the like. These additives can be used alone or in combination of two or more. The ratio of the additive is 30% by mass or less, preferably 0.01 to 20% by mass, more preferably about 0.1 to 10% by mass in the damping layer.

  The specific gravity of the damping layer may be 2 or more, for example, 2 to 4, preferably 2.2 to 3.6, more preferably 2.3 to 3.5 (particularly 2.5 to 3.4). It is. If the specific gravity is too small, the damping property may be reduced.

  The average thickness of the damping layer may be 1 mm or more, for example, 1 to 10 mm, preferably 1.5 to 8 mm, and more preferably about 2 to 6 mm (especially 2.4 to 5 mm). If the thickness of the damping layer is too thin, the damping property may be reduced.

[First fiber layer]
In the present invention, by laminating the first fiber layer on at least one surface of the damping layer, asphalt of the damping layer can be impregnated in at least a part of the first fiber layer, and an adhesive layer described later In addition, since at least a part of the first fiber layer can be impregnated, an anchor effect is exhibited and adhesion between the layers of the vibration damping material can be improved.

  The first fiber layer is composed of a fiber assembly, and the fiber assembly is usually a fabric. Examples of the fabric include woven fabric, knitted fabric, net, paper, and non-woven fabric. Of these, non-woven fabrics are preferred from the standpoints of productivity and adhesion to the vibration damping layer and the first adhesive layer.

The non-woven fabric may contain fibers, and examples of the fibers include natural fibers (cotton, hemp, etc.), regenerated fibers (rayon, etc.), semi-synthetic fibers (cellulose ester fibers, etc.), synthetic fibers [polyolefin fibers (polyethylene fiber fibers, such as polypropylene fibers), styrenic fibers, tetrafluoroethylene fibers, acrylic fibers, polyvinyl alcohol fibers (ethylene vinyl alcohol fiber, etc.), polyester fibers (polyethylene terephthalate, poly-C such as polyethylene naphthalate _{2- 4} Alkylene-arylate fibers, wholly aromatic polyester fibers such as liquid crystal polyester fibers), polyamide fibers (aliphatic polyamide fibers such as polyamide 6, polyamide 66, wholly aromatic polyamide fibers such as aramid fibers), polyurethane Textile Etc.] and inorganic fibers (carbon fiber, glass fiber, etc.).

These fibers can be used alone or in combination of two or more. Among these fibers, cellulose fibers such as cotton and rayon, polyolefin fibers such as polyethylene fibers and polypropylene fibers, polyester fibers such as polyethylene terephthalate fibers, polyamide fibers such as polyamide 6 fibers, etc. are widely used. From the point of view, polypropylene-based fibers and polyester-based fibers are preferred, and from the point of strength and heat resistance, poly _C2-4 alkylene-arylate-based fibers such as polyethylene terephthalate and polyethylene naphthalate (especially polyethylene terephthalate-based fibers) are particularly preferred.

  The average denier of the fibers constituting the fiber assembly (in particular, non-woven fabric) is about 0.1 denier or more, for example, 0.1 to 5 denier, preferably 0.2 to 4 denier, more preferably 0.5 to 3 It may be about denier. If the fineness is too small, the strength may decrease.

  The average fiber length is preferably a long fiber from the viewpoint of improving mechanical properties such as strength, and may be 150 mm or more, for example, 200 mm or more, preferably 500 mm or more, more preferably 1000 mm or more, and has an infinite length. It may be. The long fiber nonwoven fabric can be produced by a conventional method such as a direct spinning method such as a spun bond method, a melt blow method, or a flash spinning method. Among these, non-woven fabrics obtained by the spunbond method are widely used from the viewpoint of economy and the like.

Fiber assembly (particularly, nonwoven fabric) basis weight of may be 10 g / ^{m 2} or more (e.g., 10 to 500 g / ^{m 2} or so), for example 10 to 100 g / ^{m 2,} preferably 15 to 80 g / ^{m 2,} further preferably from 20 to 50 g / ^{m 2} (particularly 25~40g / ^{m 2)} approximately. If the basis weight is too small, the effect of improving the adhesion between the layers may be reduced.

  A fiber assembly (particularly a nonwoven fabric such as a long-fiber nonwoven fabric) can be prepared through a conventional method, for example, a web forming step including the fibers and a web bonding step. Specifically, a spunbond method, It can be prepared by melt-blowing method, flash spinning method, chemical bonding method, thermal bonding method, heat embossing method, spun lace method, needle punching method, stitch bonding method or the like. Among these, the spun bond method is preferable in terms of strength and the like. In particular, the nonwoven fabric may be a polyester spunbond nonwoven fabric.

  The first fiber layer (fiber assembly) may contain an additive inside or on the fiber surface. Examples of the additive include conventional additives exemplified in the section of the damping layer. The said additive can be used individually or in combination of 2 or more types. The ratio of the additive is 50% by mass or less, preferably 0.01 to 30% by mass, and more preferably about 0.1 to 10% by mass with respect to the entire fiber layer.

  The thickness (average thickness) of the first fiber layer (fiber assembly) may be 0.05 mm or more, for example, 0.1 to 1 mm, preferably 0.15 to 0.7 mm, and more preferably 0.2. It is about 0.5 mm. If the thickness of the fiber layer is too thin, the interlayer adhesion of the damping material may be reduced.

[First adhesive layer]
The first adhesive layer may contain a thermoplastic resin, but generally, the proportion of the thermoplastic resin is 50% by mass or more, preferably 80% by mass or more, with respect to the entire first adhesive layer. More preferably, it is 90 mass% or more.

  As the thermoplastic resin, a conventional adhesive resin (binder resin) can be used, and a hot melt adhesive (heat melting type) resin is preferable from the viewpoint of excellent productivity and high adhesive strength. Examples of hot melt adhesive resins include olefin resins, vinyl resins, (meth) acrylic resins, styrene resins (styrene-butadiene copolymers, etc.), polyesters (aliphatic polyesters, amorphous polyesters, etc.). , Aliphatic polyamide, urethane resin, thermoplastic elastomer and the like. These thermoplastic resins can be used alone or in combination of two or more. Of these thermoplastic resins, polyethylene resins are preferred because they are excellent in adhesiveness and have a low melting point and excellent soundproofing material productivity.

  Examples of the polyethylene resin include low density polyethylene (LDPE), linear low density polyethylene (LLDPE), medium density polyethylene (MDPE), high density polyethylene (HDPE), ethylene-propylene copolymer, ethylene-butene- 1 copolymer, ethylene-propylene-butene-1 copolymer, ethylene- (4-methylpentene-1) copolymer, ethylene-vinyl acetate copolymer, ethylene-methyl methacrylate copolymer, etc. are mentioned. These polyethylene resins can be used alone or in combination of two or more. Among these polyethylene-based resins, polyethylene such as LDPE and LLDPE, ethylene-vinyl acetate copolymer, and the like are preferable from the viewpoint of low melting point and excellent adhesiveness.

  The melting point or softening point of the thermoplastic resin is preferably lower than the softening point of the asphalt of the damping layer and the resin film of the first soft layer, for example, 3 ° C. or higher (for example, 5 to 100 ° C. than the softening point of the asphalt). ° C, preferably about 10 to 50 ° C). Specifically, the melting point or softening point of the thermoplastic resin may be 130 ° C. or lower, for example, 60 to 130 ° C., preferably 65 to 125 ° C., more preferably about 70 to 120 ° C. If the melting point or softening point of the thermoplastic resin is too high, the temperature at which the thermoplastic resin is melted or softened becomes high, so that the vibration damping layer and the first soft layer may be melted and deformed or distorted.

  The first adhesive layer may contain an additive. Examples of the additive include conventional additives exemplified in the section of the damping layer. The said additive can be used individually or in combination of 2 or more types. The proportion of the additive is 50% by mass or less, preferably 0.01 to 30% by mass, and more preferably 0.1 to 10% by mass, with respect to the entire first adhesive layer.

  The thickness (average thickness) of the first adhesive layer is about 5 μm or more, and is, for example, about 5 to 100 μm, preferably 8 to 50 μm, and more preferably about 10 to 30 μm (particularly 12 to 20 μm). If the thickness of the first adhesive layer is too thin, the adhesive strength may be reduced, and the damping layer and the soft layer may not be integrated.

[First soft layer]
In the present invention, by providing the first soft layer on the side fixed to the vibration portion of the damping layer, the damping material can be easily fixed to the vibration portion via the fixed layer containing the adhesive component or the adhesive component. Even if the vibration damping material is heated, the soft layer can suppress asphalt exudation, and thus the decrease in adhesion of the fixed layer can also be suppressed. In addition, since the first soft layer is a resin film, it has high flexibility and can follow vibration places having various shapes such as a curved shape and an uneven shape. Furthermore, since the first soft layer has a high affinity with the adhesive component or the adhesive component of the fixed layer described later, the vibration damping material can be firmly fixed to the vibration location.

  The first soft layer may be a resin film. Specifically, the first soft layer is a non-porous resin film capable of preventing asphalt exudation. Specifically, the first soft layer has an air permeability measured by a breathability tester of 1 kPa · It may be s / m or more, preferably 10 kPa · s / m or more, more preferably 25 kPa · s / m or more, and the air permeability which can not be measured by the air permeability tester is particularly preferable. As the air permeability tester, a commercially available air permeability tester (for example, “KES-F8” manufactured by Kato Tech Co., Ltd.) can be used.

The resin constituting the resin film may be a curable resin such as a thermosetting resin (for example, a thermosetting polyurethane etc.), but a thermoplastic resin is preferable in terms of excellent flexibility. As a thermoplastic resin, for example, polyolefin (polyethylene resin, polypropylene resin, etc.), styrene resin (polystyrene, styrene-acrylonitrile copolymer, etc.), fluorine resin (polytetrafluoroethylene, etc.), (meth) acrylic resin Resin (polymethyl methacrylate etc.), polyester (poly C _2-4 alkylene-arylate resin etc. such as polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate etc.), polyamide (aliphatic polyamide etc. such as polyamide 6, polyamide 66 etc.) And polyurethane (polyester type polyurethane, polyether type polyurethane, etc.). These thermoplastic resins can be used alone or in combination of two or more.

Of these thermoplastic resins, polyolefins such as polyethylene and polypropylene, polyesters such as polyethylene terephthalate and polybutylene terephthalate, and polyamides such as polyamide 6 and polyamide 66 are widely used. C _2-4 alkylene-arylate resins (particularly polyethylene terephthalate resins) are preferred.

  The melting point of the thermoplastic resin is preferably higher than the melting point of the asphalt of the vibration damping layer from the viewpoint of handleability and the productivity of the damping material, and is 150 ° C. or higher (for example, 150 to 350 ° C.). For example, 160 ° C. or more (eg, 160 to 350 ° C.), preferably 180 ° C. or more (eg, 180 to 320 ° C.), more preferably 200 ° C. or more (eg, 200 to 300 ° C.), particularly 230 ° C. or more (eg, 230) -270 ° C.).

  The first soft layer (resin film) may contain an additive. Examples of the additive include conventional additives exemplified in the section of the damping layer. The said additive can be used individually or in combination of 2 or more types. The proportion of the additive is 50% by mass or less, preferably 0.01 to 30% by mass, and more preferably about 0.1 to 10% by mass, based on the entire first soft layer.

  The thickness of the first soft layer (resin film) is thin enough to maintain mechanical characteristics that can suppress asphalt exudation and to follow various locations of vibration such as curved shapes and irregular shapes. Is preferred. The specific thickness (average thickness) of the first soft layer can be selected according to the type of resin, but may be 200 μm or less (particularly 150 μm or less), for example, from 1 to 5 from the viewpoint of securing flexibility. It may be about 190 μm (for example, 2 to 80 μm), preferably 3 to 50 μm (for example, 5 to 30 μm), more preferably about 8 to 20 μm (particularly 10 to 15 μm). If the thickness of the resin film is too thin, cracks or pores may occur during the process of production or distribution or during use, and if it is too thick, the flexibility may be reduced.

Fixed layer
The fixing layer may be any layer that includes an adhesive component or a pressure-sensitive adhesive component, and that can fix the vibration damping material to the vibration location using the adhesive force of the adhesive component or the pressure-sensitive adhesive component. In the present invention, since the damping material can be fixed to the vibration location by the adhesive force (adhesion force) of the adhesive component or the adhesive component of the fixed layer, the vibration damping material can be fixed to the vibration location by a simple method.

  As an adhesive component, a conventional adhesive component can be used, and in addition to the hot melt adhesive resin (heat melting adhesive) exemplified in the section of the first adhesive layer, a thermoplastic resin (for example, polyvinyl acetate etc.) Vinyl acetate resin, vinyl chloride resin, polyvinyl acetal, etc.), curable resin (eg, epoxy resin, urea resin, phenol resin, cyanoacrylate resin), rubber (eg, chloroprene rubber, nitrile rubber, styrene-butadiene) Rubber, silicone rubber, modified silicone rubber, etc. can be used. These adhesive components can be used alone or in combination of two or more. The adhesive component may be a commercially available adhesive, for example, a heat melting adhesive, a dry-setting (solvent evaporation type) adhesive, a moisture curing adhesive, a thermosetting adhesive, a two-component curing adhesive, an ultraviolet curing adhesive It may be an adhesive, a rewet adhesive, or the like.

  As the adhesive component, conventional adhesives can be used, for example, olefin adhesives, (meth) acrylic adhesives, polyester adhesives, urethane adhesives, rubber adhesives, asphalt adhesives, etc. it can. These adhesive components can be used alone or in combination of two or more. The adhesive component may be a commercially available pressure sensitive adhesive.

  The fixing layer may be a combination of a base material such as paper or a plastic film and an adhesive component or an adhesive component. For example, an adhesive tape in which an adhesive layer formed of an adhesive component is formed on both surfaces of the base material (double-sided tape) ) May be.

  The thickness (average thickness) of the fixed layer may be 0.1 mm or more, for example, 0.1 to 3 mm, preferably 0.2 to 2 mm, more preferably 0.3 to 1.5 mm (particularly 0.5 to 1.2 mm).

[Second Fiber Layer, Second Adhesive Layer, and Second Soft Layer]
The vibration damping material of the present invention can suppress stickiness on the other surface of the vibration damping material by laminating the second fiber layer made of the fiber assembly on the other surface of the vibration damping layer, thereby improving handling. It can be improved. As the fiber aggregate of the second fiber layer, the fiber aggregate exemplified as the fiber aggregate of the first fiber layer can be used, and the preferred embodiment is the same as that of the first fiber layer.

  The vibration-damping material of the present invention is obtained by further laminating a second adhesive layer containing a thermoplastic resin and a second soft layer made of a resin film in this order on the second fiber layer. Dust and the like are less likely to adhere, and the designability can be prevented from being lowered, and the handleability can be further improved. As a thermoplastic resin of a 2nd contact bonding layer, the thermoplastic resin illustrated as a thermoplastic resin of a 1st contact bonding layer can be utilized, A preferable aspect is also the same as that of a 1st contact bonding layer. Further, the ratio of the additive contained in the second adhesive layer and the thickness of the second adhesive layer are the same as those of the first adhesive layer. As the resin film of the second soft layer, the resin film exemplified as the resin film of the first soft layer can be used, and the preferred embodiment is the same as that of the first soft layer.

[Damping material and its manufacturing method]
In the present invention, vibration can be suppressed by integrating and fixing the vibration damping material to a vibration source or a place where vibration propagates from the vibration source via the fixed layer. In particular, since the damping material of the present invention has a soft layer, exudation of asphalt to the fixed layer can be suppressed even if the asphalt is heated and softened. Therefore, the vibration damping material of the present invention may be a vibration damping material used for a heated application. The temperature at which the damping material is heated in use may be 30 ° C. or higher, for example, 30 to 100 ° C., preferably 35 to 80 ° C., and more preferably about 40 to 60 ° C.

Since the vibration damping material of the present invention is excellent in flexibility, it can be firmly fixed following the vibration location having a curved shape or an uneven shape. The bending strength (bending rigidity EI) of the vibration damping material of the present invention is, for example, 0.01 to 5 Pa · m ⁴ , preferably 0.02 to ³ Pa · m ⁴ (particularly 0.03 to 1.5 Pa · m ⁴ ). It is an extent. Furthermore, it is preferable that the damping material of the present invention does not include a layer formed of metal from the viewpoint of flexibility. In the present specification and claims, the bending strength can be calculated based on Young's modulus x cross-sectional second moment.

  The vibration damping material of the present invention only needs to be able to be integrated by bonding the respective layers, and can be manufactured using a conventional bonding method. However, since the asphalt of the vibration damping layer has hot-melt adhesiveness, As a method for adhering the vibration layer and the first fiber layer, for example, a thermal laminating method is preferably used. The thermal laminating method may be a method in which the asphalt of the vibration damping layer is in contact with the first fiber layer in a state where the asphalt can be heat-sealed, and may be solidified before the asphalt is cooled and solidified. Both layers can be integrated by thermal lamination. Specifically, after heating and melting asphalt is applied onto the first fiber layer, it may be cooled and solidified.

  The heating temperature for heating and melting the asphalt is, for example, about 80 to 250 ° C, preferably 150 to 240 ° C, more preferably 160 to 200 ° C (particularly 170 to 190 ° C).

  Examples of the asphalt coating method include a conventional coating method such as a bar coating method, a spin coating method, a comma coating method, a die coating method, and a spray coating method.

  As a method of laminating the first adhesive layer and the first soft layer on the first fiber layer, a conventional method (thermal laminating method, wet method) depending on the kind of the thermoplastic resin of the first adhesive layer. Laminating method, dry laminating method, etc.), and when the thermoplastic resin is a hot-melt adhesive resin, after applying the hot-melted thermoplastic resin on the first fiber layer, a resin film is further formed thereon It is also possible to use a heat laminating method or the like in which the thermoplastic resin is laminated by cooling and solidified by cooling. In addition, before bonding the first fiber layer to the damping layer, the first fiber layer is laminated and integrated with the first adhesive layer and the first soft layer in advance, and the obtained laminate is bonded to the damping layer. It is also good.

  The same method can be used when laminating the second fiber layer, the second adhesive layer and the second soft layer on the other surface of the damping layer.

  EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples. However, the present invention is not limited to these examples. The evaluation of the examples was measured by the following method. In the examples, “parts” and “%” are based on mass unless otherwise specified.

[Adhesive test]
For adhesion test for iron having an attachment part (gripping part) with a tensile tester using double-sided tape ("No. 751" manufactured by Teraoka Seisakusho Co., Ltd.) on one side of a damping material previously cut into 40 mm square Fix the flexible board (70 × 70 × 8 mm) sufficiently on the other side using an epoxy adhesive (Konishi Co., Ltd. “bond quick mender”) on the other side, and use a tensile tester (Orientech Inc.) The adhesive strength (N / cm < ² >) was calculated | required by measuring a tension | pulling maximum load (N) on 2 mm / min and 20 degreeC conditions using the product "Tensilon RTA-500". At that time, an average value of five measurement results was used as a test result.

[Bleed verification]
A structural plywood cut in advance to 100 mm square was laminated on one side of a damping material cut beforehand to 100 mm square and allowed to stand under an environment of 80 ° C. for 4 hours while applying a load using iron heavy stone (10 kg) Later, the bleed condition was evaluated by measuring the colored area by bleed on the structural plywood.

[Verification of asphalt wettability for adhesives]
Apply an adhesive (solvent-based adhesive ("G10" made by Konishi Ltd.) or non-solvent-based adhesive ("made by Konishi Ltd.") to one side of the damping material and then dry The surface non-woven fabric of the damping material was peeled off after color change of the adhesive and after drying, and the color change of the asphalt mixture was confirmed.

Example 1
In advance, polyethylene melted at 300 ° C. was applied to one side of a polyester long fiber nonwoven fabric (manufactured by MSJ, weight per unit of 30 g / m ² ) at 300 ° C. with a thickness of 20 μm, and a polyester film with a thickness of 12 μm (Futamura Chemical ( Co., Ltd. “FE2001”) was laminated to obtain a face material 1. Furthermore, the face material 2 was obtained by the same method.

  Mix asphalt mixture (specific gravity 3.0, penetration 30, asphalt 13 mass%, organic modifier 2 mass% and inorganic modifier 85 mass%) at 180 ° C, using a thermal laminator. The face material 1 and the face material 2 in which the polyester long-fiber nonwoven fabrics are opposed to each other are heat-laminated with the molten asphalt composite material, and the face materials 1 and 2 are formed on both surfaces of the damping layer formed of the asphalt composite material. The damping material (thickness of 5 mm of damping layer) which Y was laminated | stacked was obtained.

(Comparative example 1)
Mix asphalt mixture (specific gravity 3.0, penetration 30, asphalt 13 mass%, organic modifier 2 mass% and inorganic modifier 85 mass%) at 180 ° C and use a heat laminator to Both sides of the damping layer formed of the asphalt composite by heat laminating a sheet of polyester long-fiber nonwoven fabric (“EO-1050” manufactured by Asahi Kasei Fibers Co., Ltd., 50 g / m ² per unit area) melted. A damping material (a damping layer having a thickness of 5 mm) was obtained by laminating a nonwoven fabric fiber layer.

  Table 1 shows the results of adhesion tests on the damping materials of Example 1 and Comparative Example 1.

  As apparent from the results of Table 1, the damping material of Example 1 had an adhesive strength of 1.5 times or more as compared with the damping material of Comparative Example 1.

  Table 2 shows the results of bleed verification for the damping materials of Example 1 and Comparative Example 1.

  As is clear from the results in Table 2, bleed did not occur in Example 1, but bleed occurred throughout Comparative Example 1.

  Table 3 shows the results of verification of asphalt infiltration with respect to the adhesive for the damping materials of Example 1 and Comparative Example 1.

  As apparent from the results of Table 3, although wetting of the asphalt did not occur in Example 1 regardless of the solvent type / non-solvent type, wetting occurred in Comparative Example 1.

  The damping material of the present invention can be used as a damping material for fixing vibration at various vibration sources or at a place where the vibration propagates from the vibration source. The vibration source includes a machine for generating a driving force, an apparatus through which a fluid passes, and a pipe (for example, a sink tank of a sink, a pipe through which water of a sink and a toilet flows, and the like). Among these, the damping material of the present invention can maintain vibration damping properties even when heated, and can follow a curved shape or uneven shape, so that it has various shapes and easily generates heat, It is particularly useful for sink sink tanks with curved sinks and pipes connected to sinks where heated washing water passes, and is particularly useful for machines or places where vibrations propagate due to large vibrations. is there. Examples of machines include transport machinery (ships, aircraft, vehicles, automobiles, motorcycles, bicycles, etc.), agricultural machinery (tractors, rice mills, combiners, etc.), industrial machinery (machine tools, bottling machinery, compressors, etc.), and households. Electric machines (such as vacuum cleaners and air conditioners). Examples of the place where the vibration of the machine propagates include piping connected to the machine, a casing (casing) or cover for housing or protecting the machine, and an oil pan (oil agent or chip holder) of the machine tool. Be

Claims (12)

  A damping layer containing asphalt, a first fiber layer laminated on one surface of the damping layer and made of a fiber assembly, laminated on the first fiber layer, and a thermoplastic resin A damping material comprising: a first adhesive layer comprising: and a first soft layer laminated on the first adhesive layer and made of a resin film.   The damping material according to claim 1, wherein the resin film has an average thickness of 200 μm or less.   The damping material according to claim 1 or 2, wherein the resin film is a polyester film.   The damping material according to any one of claims 1 to 3, further comprising a fixing layer for fixing to a vibration location on the first soft layer, and the fixing layer includes an adhesive component or an adhesive component.   The damping material according to any one of claims 1 to 4, wherein the thermoplastic resin of the first adhesive layer is a polyethylene resin.   The vibration damping material according to any one of claims 1 to 5, wherein the fiber assembly of the first fiber layer is a polyester nonwoven fabric.   A second fiber layer laminated on the other surface of the damping layer and made of a fiber assembly, and a second adhesive layer laminated on the second fiber layer and containing a thermoplastic resin; The vibration damping material according to any one of claims 1 to 6, further comprising a second soft layer that is laminated on the second adhesive layer and made of a resin film.   The vibration damping material according to any one of claims 1 to 7, which is heated to 30 ° C or higher in use.   The vibration damping material according to any one of claims 1 to 8, which is a vibration generating machine or a vibration damping material for fixing the vibration of the machine to a position where the vibration is transmitted.   The method to suppress the vibration derived from the said vibration source by fixing the damping material in any one of Claims 4-9 through the fixed layer to the location which a vibration propagates from a vibration source or a vibration source.   The method according to claim 10, wherein the damping material is heated to 30 ° C or more in use.   The method according to claim 10 or 11, wherein the vibration source is a machine.