JP2008044459A - Automotive sound absorption mat and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automotive sound absorption mat placed on a floor in the automobile and used for enhancing sound absorption effect, and its manufacturing method. <P>SOLUTION: In the automotive sound absorption mat and its manufacturing method, a surface base material comprising a carpet or the like, a synthetic resin film positioned at a back surface side of the surface base material and provided with a large number of ventilation holes and a felt-like non-woven fabric are superposed and integrated in the order through an adhesive in the state that air-permeation property is retained respectively. As the adhesive, any one kind of adhesive of a solvent based adhesive, an emulsion based adhesive or a hot melt based adhesive is used. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a sound-absorbing mat for automobiles used for placing on a floor in an automobile to enhance a sound-absorbing effect, and a method for manufacturing the same.

  2. Description of the Related Art Conventionally, an automobile sound-absorbing mat is used on a floor in an automobile in order to prevent a vibration and noise of the automobile from being transmitted to the inside of the automobile and to obtain a comfortable ride. This sound-absorbing mat for automobiles is known to have a structure in which a felt-like sound-absorbing member is bonded to the back side of a surface layer member such as a carpet, and is placed on a floor carpet that is stored on the floor in the vehicle interior. Used. The sound-absorbing mat for automobiles is used in combination with vibration-damping members, sound-insulating members, and floor carpets, and controls high-frequency noises such as low-frequency road noise and wind noise generated from the tires and road surface during traveling. This contributes to improving the soundproofing performance.

For example, an invention of an automobile floor mat in which a small hole is formed in a felt-like sound absorbing member is disclosed (see Patent Document 1). Further, an invention of an automobile carpet in which a breathable material in which a synthetic thermoplastic resin powder is applied in a mesh shape is lined on the back surface of a surface layer member and a sheet-like sound absorbing member is joined thereto is disclosed (Patent Document 2). reference). However, all of the above inventions are common in providing air permeability, but the former is aimed to guide the sound from the small holes drilled in the felt-like sound absorbing member to the lower latex layer, The purpose is different from the present invention. The latter uses a breathable material coated with a synthetic thermoplastic resin powder in the form of a mesh as the backing material of the surface layer member. However, it is difficult to control the density, and therefore there is a problem in controlling the air flow rate.
Japanese Patent No. 3631996 Japanese Utility Model Publication No. 58-168929

  A film-like sound absorption structure is formed when a film-like material such as a synthetic resin film takes a back air layer and stretches the film, and a single vibration system is created by the film and the back air layer to increase the sound absorption coefficient. When the graph is expressed with the axis and the frequency (Hz) as the horizontal axis, the sound absorption characteristic of a mountain shape centering on the resonance frequency is shown. In addition, the perforated plate-like material with holes in the plate-like material constitutes a perforated plate sound absorption structure integrated with the back air layer, and has a mountain-shaped sound absorption characteristic centering on a certain frequency as a resonance type sound absorption structure. Show. This is because the structure in which the perforated plate-like material and the back air layer are integrated constitutes a vibration system having a mass and a spring, and that part corresponding to the mass with respect to the sound of the resonance frequency of this system. The air is vibrated vigorously and the sound energy is absorbed.

  Therefore, the inventor of the present application provides a synthetic resin film having a large number of ventilation holes between the skin base material and the felt-like non-woven fabric, and uses two sound absorption theories of the film-like sound absorbing structure and the perforated plate sound absorbing structure. In addition to raising the overall sound absorption coefficient of the sound-absorbing mat for automobiles, the air permeability factor consisting of the hole diameter, pitch and air flow rate is closely related to the sound absorption characteristics. The present invention has been conceived by knowing that the sound absorption characteristics can be controlled by controlling these, and the present invention eliminates the difficult problem of controlling the air flow rate with the backing material of the surface layer member, An object of the present invention is to provide an automobile sound-absorbing mat capable of forming a sound-absorbing peak in a required sound-absorbing band and a method for manufacturing the same.

  In order to solve the above-described problems, the present invention provides a skin base material made of carpet or the like, a synthetic resin film having a large number of ventilation holes on the back side of the skin base material, a felt-like nonwoven fabric, The sound absorbing mat for automobiles is characterized by being laminated and integrated in this order through an adhesive and maintaining air permeability (claim 1).

  In order to solve the above-mentioned problems, the present invention provides that the adhesive layer is formed on one side of the synthetic resin film, excluding the ventilation holes, or the adhesive layer has air permeability on the back surface of the skin base material. An adhesive that is formed by holding and having a skin base material laminated and integrated on one side of the synthetic resin film via any one of the adhesive layers, and removing the air holes on the other side of the synthetic resin film A layer is formed, or an adhesive layer is formed on one side of the nonwoven fabric while maintaining air permeability, and the nonwoven fabric is laminated and integrated on the other side of the synthetic resin film via any one of the adhesive layers. It is preferable to use the above-mentioned sound-absorbing mat for automobiles.

  In order to solve the above-mentioned problems, the present invention uses at least one of an adhesive among a solvent-based adhesive, an emulsion-based adhesive, and a hot-melt adhesive as the adhesive or the adhesive layer. It is preferable to use the above-described sound absorbing mat for automobiles.

  In order to solve the above-mentioned problems, the present invention provides a solvent-based adhesive, an emulsion-based adhesive or a hot-melt-based adhesive on the entire surface of the both surfaces except the synthetic resin film-made ventilation holes having a large number of ventilation holes. At least one kind of adhesive was applied, and the synthetic resin film coated with the adhesive was sandwiched between the back side of the skin base material made of carpet or the like and the felted nonwoven fabric, and heated and pressurized. A method for producing a sound-absorbing mat for automobiles, characterized in that the laminate is integrally cooled and laminated later (claim 4).

  In order to solve the above problems, the present invention provides a solvent-based adhesive, an emulsion-based adhesive, or a hot-melt-based adhesive on the back side of a skin base material made of carpet or the like and on one side of a felt-like nonwoven fabric. Applying at least one kind of adhesive, heating and pressurizing the synthetic resin film having a large number of ventilation holes between the back side of the skin base material and the nonwoven fabric to which the adhesive is applied, and then cooling Thus, a method for producing a sound-absorbing mat for automobiles, characterized by being laminated and integrated (claim 5).

  In order to solve the above-mentioned problems, the present invention provides a skin base material made of carpet or the like, a synthetic resin film having a large number of ventilation holes on the back side of the skin base material, and a felt-like shape. In the method of manufacturing a sound-absorbing mat for automobiles, in which nonwoven fabrics are laminated and integrated in this order via an adhesive and in a state where air permeability is maintained, the hole diameter, pitch, opening ratio, air flow rate, material, thickness of the air holes And a sound absorbing mat for automobiles using any one of a porous synthetic resin film, a nonwoven fabric and a skin base material whose sound absorbing factors such as weight per unit are known in advance. Obtaining a correlation with the sound absorption characteristics of the step, and selecting a material having a predetermined sound absorption factor necessary for producing a sound-absorbing mat for automobiles having a desired sound absorption characteristic based on the correlation; In combination-option material and manufacturing method of the desired automotive sound absorbing mat comprising the steps of manufacturing the automotive sound absorbing mat with a sound-absorbing characteristics (claim 6).

  The automobile sound-absorbing mat according to the present invention includes a synthetic resin film provided with a large number of ventilation holes between a skin base material made of carpet or the like and a felt-like non-woven fabric, laminated in this order via an adhesive, respectively. The sound absorption characteristics of the resulting sound absorbing mat for automobiles can be accurately controlled by changing the air permeability factors such as the hole diameter, pitch, and air flow rate of the air holes formed in the synthetic resin film. Is possible. That is, in the case of an automobile carpet using a breathable material coated with a synthetic thermoplastic resin powder described in Patent Document 2 in a mesh shape, the size and density of the mesh cannot be accurately controlled. Control was possible so that there was a sound absorption range in the frequency range or generally in the high frequency range. However, in the case of the sound-absorbing mat for automobiles of the present invention, the air holes can be accurately drilled by defining the air permeability factors such as the hole diameter, the opening ratio and the air flow rate in the synthetic resin film. It is possible to design and manufacture an automobile sound-absorbing mat in which a sound absorption peak appears in the frequency band.

  The best mode for carrying out the present invention (hereinafter abbreviated as “embodiment”) will be described in detail with reference to the drawings. However, the present invention is not limited to such an embodiment. FIG. 1 is a sectional view showing a sound absorbing mat for automobiles according to an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes an automobile sound-absorbing mat according to an embodiment of the present invention, which is provided with a skin base material 2 made of carpet or the like, and a large number of ventilation holes 7 on the back side of the skin base material 2. The synthetic resin film 3 and the felt-like nonwoven fabric 4 are closed in this order through the adhesive 5 (adhesive layers 5a and 5b), respectively, and the adhesive plugs the ventilation holes provided in the synthetic resin film. It is composed of laminated and integrated parts without any state.

  An automobile sound-absorbing mat used on a floor carpet is composed of a felt-like sound-absorbing member bonded to the back side of a surface layer member such as carpet, and a rubber having spike-like projections on the back side. There is a type in which a sheet made of vinyl chloride resin is bonded together. The automobile sound-absorbing mat according to the present embodiment will be described mainly with the former configuration, but can also be applied to the latter type of automobile sound-absorbing mat.

  As the skin base material 2 made of a carpet or the like used in the sound-absorbing mat for automobiles according to the present embodiment, it is usually called a carpet, for example, a stepper manufactured by a loom, Wilton, Akisminster, velvet, tough Tufted by hooking, hook drag, felt hair, needle punch, raschel by knitting machine, knit and the like can be used. The carpet 2 is composed of a surface pile 2a and a base fabric 2b supporting the pile 2a, and any carpet or the like can be used as long as it has air permeability. Furthermore, what adhered the felt-like nonwoven fabric etc. to the back side of the original carpet is also contained. In the case of the skin base material 2, a felt-like nonwoven fabric, an effective synthetic resin film, and a felt-like nonwoven fabric are laminated and integrated in this order via an adhesive and on the back side of the original carpet while maintaining air permeability. It becomes. Both nonwoven fabrics sandwiching the effective synthetic resin film may be of the same type, but the nonwoven fabric on the carpet side has good adhesion and breathability, and the nonwoven fabric on the bottom is preferably used with a good sound absorption. .

  As a material for the synthetic resin film 3, polyolefin resins such as polyethylene and polypropylene, polyester, EVA, vinyl chloride resin, acrylic resins, other thermoplastic resins, copolymer resins, resin compositions, and the like can be used. . In addition to the single film, a multilayer film of coextruded film may be used. Further, when the film is hard, a chevron showing frequency characteristics appears sharply, and when it is soft, it tends to be a gentle shape. When the film is too hard and too sharp, not only the frequency band is narrowed but also the film itself may emit a sound accompanying deformation, which is not preferable. The film thickness is preferably as thin as possible, but is preferably in the range of 0.01 to 1.00 mm in consideration of workability and strength.

The method of drilling holes in the synthetic resin film 3 is not particularly limited. For example, a method of drilling using a punching machine such as a punching machine, or a film on a roll in which a needle heated to about 400 ° C. is planted on the surface. There is a method of drilling through. The air permeability factors that are considered to be the most influential factors on the sound absorption characteristics of the sound absorbing mat for automobiles include the hole diameter, pitch, opening ratio, and air flow rate of the air holes. Here, the hole diameter of the ventilation hole is a numerical value representing the diameter of the hole in mm, and the opening ratio is represented by any one of the pitch of the hole, the number of holes per unit area, or the percentage of the opening area per unit area. Is done. Further, the air flow rate is represented by air permeability (cc / cm ² / sec) based on JIS L1096.

  Examples of the felt-like nonwoven fabric 4 provided in contact with the synthetic resin film 3 include a needle punched nonwoven fabric, a spunbond nonwoven fabric, and a melt blown nonwoven fabric. These may be a single layer or the same or different sound-absorbing nonwoven fabrics may be used in multiple layers. There are various theories on the sound absorption mechanism. With the sound absorbing mat for automobiles of the present invention, when sound waves enter the nonwoven fabric 4, the air in the gaps between the short fibers vibrates, and due to the viscosity of the air, part of the energy of the sound waves is thermal energy. Therefore, sound is absorbed when sound waves are attenuated. The porous synthetic resin membrane 3 is bonded to the nonwoven fabric 4 to act in the same manner as the Helmholtz resonator, and the structure of the porous synthetic resin membrane 3 and the back air layer (nonwoven fabric) has a vibration system of mass and spring. It is considered that the sound absorption effect is further improved as a result of vigorous vibration of the air in the hole portion corresponding to the mass and absorption of sound energy due to friction loss.

  Next, a method for manufacturing a sound absorbing mat for automobiles according to the present embodiment will be described. However, the manufacturing method of the sound absorbing mat for automobiles of the present invention is not limited to this manufacturing method. FIG. 2 is an explanatory view of a manufacturing apparatus for manufacturing the automobile sound-absorbing mat according to the embodiment of the present invention. In this figure, 11 is a first supply roll, 12 is a second supply roll, 13 is a guide roll, 14 is a roll coater, 15 is a crimping roll, 16 is a heat drum, 17 is an embossing roll, 18 is a backup roll, and 19 is a winder.

  First, in the first step, a perforated synthetic resin film 3 made of a film having predetermined air holes is previously set on the first supply roll, and the felt-like nonwoven fabric 4 is set on the second supply roll. Set. The roll coater 14 receives an adhesive in a container in advance. Next, after passing the perforated synthetic resin film 3 and the nonwoven fabric 4 through the apparatus, the apparatus is switched on. Then, an adhesive is applied to a portion other than the air holes on the back side (lower surface) of the porous synthetic resin film 3, and the heat is applied in a state where the adhesive is applied to the nonwoven fabric 4 from the second supply roll. After being sandwiched between the drum 16 and the pressure roll 15 and heated and pressurized, it is scraped off by a winder 19 to obtain a two-layer laminate of the perforated synthetic resin film 3 and the nonwoven fabric 4.

  Next, in the second step, the roll-shaped two-layer laminate bonded in the above process is set on the second supply roll, and the skin base material 2 made of carpet or the like is set on the first supply roll. In the same manner as in the first step, an adhesive is applied to the back side of the skin base material 2, and the porous synthetic resin film-forming surface of the two-layer laminate is superimposed on the adhesive application surface, and heated and pressurized. A three-layer laminate in which the skin base material 2, the perforated synthetic resin film 3 and the nonwoven fabric 4 are laminated in this order via an adhesive is obtained. Further, the three-layer laminate is roughly cut into a predetermined size, punched into a predetermined shape, and a desired automobile sound absorbing mat is obtained through a finishing process.

The adhesive is not particularly limited, but can be appropriately selected from a solvent-based adhesive, an emulsion-based adhesive, or a hot-melt-based adhesive depending on the type of material for the porous synthetic resin film and other bonded substrates. It is preferable to use it. The amount of adhesive applied is not limited as long as air permeability is maintained, but is preferably 80 to 150 g / m ² when the solid content of the adhesive is about 30%. If it is less than 80 g / m ² , the required adhesive strength may not be reached, and if it exceeds 150 g / m ² , the air permeability required particularly when applying an adhesive to the nonwoven fabric side may not be obtained. It is. The method of applying the adhesive is not particularly limited, but in the case of a liquid adhesive, a reverse roll coater, a knife coater, a spraying method, or the like is preferable. The hot melt adhesive is preferably in the form of a net. After the substrate is warmed to the vicinity of the glass transition point, it is temporarily attached to one adherend, and after the hot melt adhesive is heated to the melting point or higher, the other adherend is applied. The body is overlapped and pressed to adhere.

  In the present embodiment, in the first step, an adhesive is applied to one side of the perforated synthetic resin film 3 and bonded to the nonwoven fabric 4, and in the second step, the adhesive is applied to the base fabric side of the back surface of the carpet. And bonded to the porous synthetic resin film 3. The above manufacturing method is merely an example, and in addition to this, for example, after applying an adhesive on both the front and back surfaces of the porous synthetic resin film 3, the skin base material 2 and the nonwoven fabric 4 are respectively applied to the front and back surfaces of the film. Lamination may be performed in one step. The surface to which the adhesive is applied may be applied to either the front or back side of the porous synthetic resin film 3 or both sides, or may be either the back side of the skin base material 2 or one side of the nonwoven fabric 4. Should be selected in consideration of In addition, in the case of the skin base material 2 in which the felt-like non-woven fabric is bonded to the back side of the original carpet described above, a laminated material in which the felt-shaped non-woven fabric is previously bonded to both sides of the porous synthetic resin film 3 is prepared. In addition, you may bond the skin base material 2 to the single side | surface of this laminated material.

Examples of the present invention will be described below. However, the present invention is not limited to this embodiment. First, the following materials were prepared, and an automobile sound absorbing mat was manufactured according to the manufacturing method described in the above embodiment.
<Material>
Skin base material: material nylon thread, basis weight 700 g / m ² , pile height 8.5 mm,
Gauge 1/8
Non-woven fabric (needle punch): material polyester, thread thickness 4-12 denier,
Weight per unit area 500 g / m ² and 700 g / m ²
Adhesive: Solvent type urethane adhesive, basis weight 80-150 g / m ²
Perforated synthetic resin film: 0.05 mm thick polyethylene film, 0.10 mm thick polyethylene film, 0.05 mm thick polyester film <Test method>
The sound absorption coefficient is measured by a normal incidence method (JIS A 1405).

  With respect to the obtained sound absorbing mat for automobiles, the sound absorption rate was measured by a normal incidence measurement method (base), and the relationship between the sound absorption rate and the frequency was shown in a graph (see FIGS. 3 to 7). FIG. 3 is a graph showing the correlation between the air flow rate and the sound absorption characteristics. FIG. 4 is a graph showing the correlation between the difference in film materials and sound absorption characteristics. FIG. 5 is a graph showing the correlation between the difference in the number of holes formed in the film and the sound absorption characteristics. FIG. 6 is a graph showing the correlation between the difference in film thickness and the sound absorption characteristics. FIG. 7 is a graph showing the correlation between the difference in the basis weight of the nonwoven fabric and the sound absorption characteristics.

  The graph will be described below. From the graph shown in FIG. 3, it was confirmed that the sound absorption characteristic peak shifts toward the high frequency band when the air flow rate (the air flow rate here indicates the air flow rate of the mat) increases. From the graph shown in FIG. 4, the polyester film having a high hardness tends to appear sharper than the polyethylene film having a low hardness. However, when a large number of small vents are perforated, there is a tendency to be gentle. From the graph shown in FIG. 5, when the large-diameter holes are loosely opened (108B), the sound absorption peak appears sharply, and when the small-diameter holes are densely opened (105), the sound absorption peak is gentle. Appear in Here, the relationship between the hole size and the hole arrangement is as shown in FIG. From the graph shown in FIG. 6, the thickness of the film tends to be interlocked with the hardness of the film. That is, when the same material is thick, the sound absorption characteristic peak appears sharply, and when it is thin, it appears gently. From the graph shown in FIG. 7, the sound absorption characteristic peak tends to appear sharper and higher as the basis weight of the nonwoven fabric increases.

The graph shown above is only an example, but as described above, the air-absorbing factors such as the air diameter, pitch, opening ratio, air permeability, etc., material, thickness, basis weight, etc. of the air holes are known in advance. From a sound-absorbing mat for automobiles using a porous synthetic resin film, nonwoven fabric and skin base material, a graph shows the correlation between the sound-absorbing factor resulting from the porous synthetic resin film and the sound-absorbing characteristics of the sound-absorbing mat for automobiles Based on the graph showing the correlation, for example, a sound absorption peak appears at a frequency of 3000 (Hz), and a material necessary for manufacturing a sound absorbing mat for automobiles having a sound absorption rate of 0.84% is shown. As an example, select a polyethylene film with an opening ratio of 7% and a thickness of 0.05 mm, a nonwoven fabric (needle punch) with a basis weight of 500 g / m ² , and a predetermined skin base material. Retention By laminating by state, it is possible to produce a desired sound absorbing mats for automobiles.

  A computer may be used in the method for manufacturing a sound absorbing mat for automobiles having the desired sound absorbing characteristics. For example, a material file for accumulating sound absorbing factors for each material of perforated synthetic resin film, skin base material and nonwoven fabric, and a sound absorbing property file for associating the sound absorbing factor of each material with the sound absorbing property data of the sound absorbing mat for automobiles And input means for inputting the type of material to be used and the sound absorption characteristic of the desired sound absorbing mat for automobiles, and the sound absorption of each material satisfying the sound absorption characteristic from the associated file based on the input type of material and the sound absorption characteristic Use of an auxiliary device for manufacturing a sound absorbing mat for automobiles, comprising: selecting means for selecting a sex factor according to a program by a central processing unit; and output means for displaying the material selected by the selecting means and its sound absorption characteristics. it can.

  As shown in FIG. 9, the auxiliary device for manufacturing a sound-absorbing mat for automobiles according to an embodiment of the present invention has a sound-absorbing factor for each material satisfying sound-absorbing characteristics from a control program 31a for controlling a computer and the associated file. A storage device (1) 31 for storing a selection program 31b for selecting a storage device, a storage device (2) 32 for storing a material file 32a and a sound absorption characteristic file 32b, a central processing unit 33, and materials used And an input means 34 for inputting the sound absorption characteristics of the sound absorbing mat for automobiles to be obtained, and an output means 35 for displaying the material selected by the selection means and the sound absorption characteristics.

  Here, the material file 32a includes an identification number for the material used for the sound-absorbing mat for automobiles along with its sound-absorbing factors (film material, film thickness, hole diameter, pitch, number of holes, opening rate, air flow rate, etc.). Attached and stored. The sound absorption characteristic file 32b includes a sound absorption mat for automobiles obtained by combining a plurality of materials stored in the material file 32a (including a sound absorption factor for the skin base material, porous synthetic resin film, and nonwoven fabric). The sound absorption characteristic is stored with an identification number. When the input means 34 inputs, for example, the type of the skin base material, the porous synthetic resin film, the nonwoven fabric, the frequency at which the sound absorption peak appears as the sound absorption characteristic of the automobile sound absorption mat, and the sound absorption coefficient, the selection program 31b loads the sound absorption characteristic file. The material 32b is searched, a material that matches or approximates the input sound absorption characteristic is selected, and the material and the sound absorption factor are output by the output means 35. If this material is used in combination, a sound-absorbing mat for automobiles having desired sound-absorbing characteristics can be manufactured.

  The sound-absorbing mat for automobiles according to the present invention and the method for producing the same are obtained by changing the air permeability factors such as the hole diameter, pitch, and air flow rate of the air holes formed in the synthetic resin film. This is extremely useful because it is possible to design and manufacture a sound-absorbing mat for an automobile in which the characteristics are accurately controlled and a sound-absorbing peak appears in a designated frequency band.

It is sectional drawing which shows the sound-absorbing mat for motor vehicles based on embodiment of this invention. It is explanatory drawing which shows the manufacturing apparatus which manufactures the sound-absorbing mat for motor vehicles based on embodiment of this invention. It is a graph which shows the relationship between the sound absorption rate and frequency of the sound-absorbing mat for motor vehicles based on the Example of this invention. It is a graph which shows the relationship between the sound absorption rate and frequency of the sound-absorbing mat for motor vehicles based on the Example of this invention. It is a graph which shows the relationship between the sound absorption rate and frequency of the sound-absorbing mat for motor vehicles based on the Example of this invention. It is a graph which shows the relationship between the sound absorption rate and frequency of the sound-absorbing mat for motor vehicles based on the Example of this invention. It is a graph which shows the relationship between the sound absorption rate and frequency of the sound-absorbing mat for motor vehicles based on the Example of this invention. It is explanatory drawing which shows the relationship between the hole size of a perforated synthetic resin film | membrane used for the sound-absorbing mat for motor vehicles based on the Example of this invention, and arrangement | positioning of a hole. It is a block diagram which shows the manufacture assistance apparatus of the sound-absorbing mat for motor vehicles based on the Example of this invention.

Explanation of symbols

1: sound absorbing mat for automobile, 2: skin base material (carpet), 2a: pile, 2b: base fabric, 3: synthetic resin film, 4: non-woven fabric, 5: adhesive, 5a, 5b: adhesive layer, 6 : Base fabric, 7: Vent, 11: First supply roll, 12: Second supply roll, 13: Guide roll, 14: Roll coater, 15: Crimp roll, 16: Heat drum, 17: Embossing roll, 18 : Backup roll, 19: Winder,
31: storage device 1, 31a: control program, 31b: selection program, 32: storage device 2, 32a material file, 32b: sound absorption characteristic file, 32c: associated file, 33: central processing unit, 34: input means, 35: Output means

Claims (6)

A skin base material made of carpet or the like, a synthetic resin film provided with a large number of ventilation holes on the back side of the skin base material, and a felt-like nonwoven fabric in this order via an adhesive and air permeability A sound-absorbing mat for automobiles, characterized by being laminated and integrated in a state where the An adhesive layer is formed on one side of the synthetic resin film excluding the ventilation holes, or an adhesive layer is formed on the back surface of the skin base material while maintaining air permeability. The skin base material is laminated and integrated on one side of the synthetic resin film, and an adhesive layer is formed on the other side of the synthetic resin film by removing air holes, or an adhesive is formed on one side of the nonwoven fabric. 2. The automotive use according to claim 1, wherein a layer is formed while maintaining air permeability, and the nonwoven fabric is laminated and integrated on the other surface of the synthetic resin film via any one of the adhesive layers. Sound absorbing mat. 3. The automobile according to claim 1, wherein the adhesive or the adhesive layer is made of at least one of a solvent-based adhesive, an emulsion-based adhesive, and a hot-melt-based adhesive. Sound absorbing mat. Applying at least one of a solvent-based adhesive, an emulsion-based adhesive, or a hot-melt-based adhesive on the entire surface of the synthetic resin film provided with a large number of air holes, except for the air holes, For automobiles, characterized in that a synthetic resin film coated with an agent is sandwiched between the back side of a skin base material made of carpet or the like and a felt-like nonwoven fabric, heated and pressurized, then cooled and laminated together A method for producing a sound absorbing mat. Applying at least one of a solvent-based adhesive, an emulsion-based adhesive, or a hot-melt-based adhesive to the back side of a skin base material made of carpet or the like and one side of a felt-like nonwoven fabric, and the adhesive A sound-absorbing mat for automobiles, characterized in that a synthetic resin film having a large number of ventilation holes is sandwiched between a back surface side of a skin base material coated with sapphire and heated and pressurized, and then cooled and laminated together Manufacturing method. A skin base material made of carpet or the like, a synthetic resin film provided with a large number of ventilation holes on the back side of the skin base material, and a felt-like nonwoven fabric in this order via an adhesive and air permeability In a method for manufacturing a sound-absorbing mat for automobiles, which is laminated and integrated with holding the sound, the sound-absorbing factors such as the hole diameter, pitch, aperture ratio, air flow rate, material, thickness and basis weight of the air holes are known in advance. Obtaining a correlation between a sound absorbing factor caused by the material and a sound absorbing characteristic of the sound absorbing mat for a car from a sound absorbing mat for a car using any of synthetic resin film, nonwoven fabric and skin base material, and the correlation A step of selecting a material having a predetermined sound absorption factor necessary for manufacturing an automobile sound-absorbing mat having a desired sound-absorbing characteristic, and combining the selected material to obtain a desired sound-absorbing characteristic. Method of manufacturing an automotive sound absorbing mat comprising the steps of manufacturing the example was sound-absorbing mats for automobiles.

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