KR20060043907A - The manufacturing process of noise and sound damping pad - Google Patents

Abstract

The present invention is 20 to 40 parts by weight of blown asphalt (powder asphalt) and 50 to 80 parts by weight of powder or flaky inorganic filler, 1 to 5 parts by weight of adhesive, 1 to 5 parts by weight of process oil, 5 to 10 parts by weight of synthetic rubber And a dustproof sheet consisting of 0.2-5 parts by weight of organic fiber filler and 1-4 parts by weight of quicklime, and waste polyurethane foam which is disposed of in a car seat interior material, sofa, etc., under the vibration damping sheet, and then washed and dried. The present invention relates to a sound absorbing and insulating material produced by bonding a recycled polyurethane foam sheet, which is pulverized to a size of about 0.5 to 1 cm in length by a grinder, and thermally compressed with a thermocompressor, regenerated by a conventional method, with an acrylic adhesive.

Sound absorbing and insulating material. Vibration damping sheet. Recycled Polyurethane Foam Sheets.

Description

Sound absorbing and insulating material and its manufacturing method

1 is a cross-sectional view of the present invention.

2 and 3 are actual photographs of the present invention.

Figure 4 is a comparison of the present invention with other products in the low frequency band.

Figure 5 is a comparison of the present invention with other products in all bands.

(Explanation of symbols for the main parts of the drawing)

Vibration damping sheet (1), acrylic adhesive (2), recycled polyurethane foam sheet (3)

The present invention can completely absorb and block the noise and vibration insulation generated in the apartment house, vehicle engine room, railway vehicles, walls and floors, generators, construction equipment, gym floors and walls, railway rail foundations, sound absorption vibration insulation The present invention relates to a sound absorbing and insulating material designed and manufactured to be able to further laminate or thin a product according to its performance, and to add a finishing material to a surface exposed to the exterior when used as a building interior material.

Conventional sound absorbing and insulating material was used by adding a finishing material to the foam, glass fiber, fiber felt, urethane foam, or by laminating the foam by punching the leather. In case of vibration with severe noise, it is necessary to attach several sound insulation materials or Jaejin materials separately, so that several sheets are overlapped or supplemented by design structure. For example, if the thickness of the concrete is changed by changing the design to prevent the noise between floors of the MDU, additional costs are required to strengthen the foundation of the building. In the case of the sound absorbing and insulating material to be added in addition to the floor, it was simply constructed using a polystyrene foam, recycled tires, Yves foam, etc., but the performance was not greatly improved. In addition, the sound absorbing and insulating heat insulating material mainly made of a heat insulating material such as polystyrene foam, polyurethane foam, glass fiber. In such a structure, it was difficult to completely absorb and block the sound absorbing or sound insulation generated.

There have been many studies to solve this problem.

For example, the Republic of Korea Utility Model Registration No. 20-0328036 describes a soundproof sheet reinforced with a preventive material to prevent the sound-proof sheet is settled or sag between the polyurethane layer,

Korean Unexamined Patent Publication No. 10-2000-0066038 describes a hardener mixture of anti-vibration and sound insulation using waste material of YB synthetic resin foam,

Korean Patent Publication No. 10-2004-0004864 discloses a sound insulation sheet for reducing floor impact sound processed into a plate by dispersing an inorganic fiber mixture of polyvinyl chloride, calcium carbonate, barium sulfate, and a plasticizer pigment.

Korean Patent Publication No. 10-1998-0077532 describes a polyurethane foam in which asphalt is dispersed and a manufacturing method thereof.

Publication No. 10-2004-0081371 describes a sound insulation and insulation member comprising a polyurethane rigid foam panel,

Korean Patent Publication No. 10-2004-0004152 discloses a foamed resin laminated soundproof plate, an unfoamable foamable resin, a foamed resin laminated soundproof plate laminated with a hard plate, and a manufacturing method thereof.

Korean Patent Publication No. 10-0387690 discloses a method for producing a rigid urethane foam insulation using waste polyurethane formed by grinding and shredding waste urethane, mixing and compressing recycled urethane and silicon, and heating and drying. Yes, but

Conventional technologies as described above are mainly made of insulation materials such as Schiropol, urethane foam, glass fiber, and the like. However, in such a structure, it is difficult to completely absorb and block sound absorption or sound insulation caused by natural vibration of a building.

In addition, foamed asphalt material (JP0098502 Nippon Seniko Industrial Co., Ltd., JP0139691 Nippon Steel Chemical Co., Ltd. <JP0189055 Aida Sang 회사 Co., Ltd.) was used, and the Republic of Korea Patent Publication No. 1998-025322 is a sound absorbing Although open,

In the prior art as described above, the hot melt material was applied to the surface to overcome the limitations of the magnetic force, but also exhibited stronger adhesion and vibration damping performance, but only the magnetic foams of the foam type had excellent workability and generated noise. The ability to block the power was excellent, but the effect of preventing the structural vibration from being transmitted to the building itself was small.

Non-foamable magnetic rubber pads (US005300355A) and pressure-sensitive adhesive laminates (US005695867A) consisting of a pressure-sensitive adhesive layer, a hardener layer, and a binder and a surface layer have been produced, and these products have been used mainly for industrial purposes. Was high, and the dust-proof property was slightly inferior to the asphalt system.

In order to solve the problems of the prior art, the present invention is a structure that maximizes the sound absorption and sound insulation performance at the same time in order to maximize the impact sound reduction effect without structural changes, such as buildings, by applying an asphalt sheet on the top, blocking the noise generated The purpose of the present invention is to provide a sound absorbing and insulating material and a method for manufacturing the same, which simultaneously perform a role of blocking the impact sound generated by the vibration by controlling the structural vibration generated in the building by stacking waste polyurethane foam thereunder. have.

In order to achieve the above object, the present invention is 20 to 40 parts by weight of blown asphalt (Blown Asphalt) and 50 to 80 parts by weight of the inorganic filler powder or flakes, 1 to 5 parts by weight of the adhesive, process oil 1 to 5 It is prepared by adhering a vibration damping sheet consisting of parts by weight, 5-10 parts by weight of synthetic rubber and 0.2-5 parts by weight of organic fiber filler and 1-4 parts by weight of quicklime, and a regenerated polyurethane foam sheet on the bottom of the vibration damping sheet with an acrylic adhesive. A sound absorbing and insulating material and a manufacturing method thereof.

The present invention contains a specific inorganic filler, pressure-sensitive adhesive, synthetic rubber, organic fibrous fillers on asphalt having a specific penetration degree to improve the thermal stability to improve the vibration damping performance and thermal stability, and to wash and dry waste polyurethane And a recycled polyurethane foam sheet prepared by thermocompression bonding the crushed chip, and a sound absorbing and insulating material manufactured by adhering the two sheets with an acrylic adhesive.

When the vibration damping sheet uses blown asphalt, which is generally solid at room temperature, the thermal fluidity is suppressed, so that the problem of dustproofness and pollution is reduced in an area above room temperature compared to when using straight asphalt, and contamination is less than 20 parts by weight. When adhesiveness falls and exceeds 40 weight part, a crack generate | occur | produces in a fall test, and 20-40 weight part is preferable.

Powdered or flaky inorganic fillers use any one compound selected from calcium carbonate, talc, cray, mica, and mica, or two or more compounds. In particular, mica has excellent cold resistance and heat resistance, which results in heat flow in the entire temperature range. It is very effective in maintaining the dustproof function, and also has a function to compensate for cold resistance and impact resistance. If the amount is less than 50 parts by weight, fouling resistance is lowered, and if it exceeds 80 parts by weight, sheeting (Sheeting) is lowered, so 50 to 80 parts by weight is the preferred amount.

The pressure sensitive adhesive uses any one compound selected from petroleum resin, kumaron resin, polystyrene resin, polyethylene resin and ethylene vinyl acetate resin, and is used to facilitate roll formability. This is insufficient, since the problem of excessively hardening the sheet (Hard) occurs at room temperature if it exceeds 5 parts by weight is preferably 1 to 5 parts by weight.

Process oil does not need to be particularly limited because it uses petroleum or vegetable oil, and is used to improve the mixing and processability of each component.

Synthetic rubber is used to reduce the change of shape, prevent the problem of dropping the bonding strength of materials due to the heat-blown asphalt binding force and shape retention force, and to show the excellent dustproof property over a wide temperature range, styrene-butadiene styrene Any one compound selected from styrene-butadiene styrene terpolymer (SBS), ethylene propylene diene rubber (EPDM), and styrene-butadiene rubber (SBR) is used.

The organic fibrous filler is used to give field workability of the sheet state before fusion by supplementing the strength of the product, using any one organic fiber selected from vegetable or synthetic fibers, and the amount used is 0.2 to 5 parts by weight.

In addition to using 1 to 4 parts by weight of quicklime and more than 4 parts by weight it is preferable to use less than 4 parts by weight because the workability worsens.

The manufacture of the vibration damping sheet is to maintain the vibration damping, sound insulation performance in the region of more than 40 ℃ due to increased stability by heat, in particular can prevent the vibration damping, sound absorption, sound insulation deterioration caused by heating.

The waste polyurethane foam sheet is collected from the waste polyurethane foam discarded in automobile seat interior materials, sofas, washed and dried, and then crushed into a size of 0.5-1 cm in length by a grinder, followed by thermocompression bonding with a thermocompressor. Since the normal waste polyurethane foam sheet manufactured is used, it is possible to reuse environmental wastes of several hundred tons per year as recycled raw materials are used.

As the adhesive used in the present invention, an acrylic adhesive was used.

Hereinafter, the present invention will be described in detail with reference to the following Examples.

Example

1st process (manufacturing damping sheet)

The composition was weighed at 30 kg Blown Asphalt, 50 kg of powdered talc, 4 kg of polystyrene resin, 3 kg of process oil, 7 kg of styrene-butadiene styrene polymer and 3 kg of nonwoven fabric, 3 kg of quicklime, and then 70 in a mixer. The mixture is heated to ˜120 ° C., sufficiently stirred within 5 minutes, extruded by an extruder, and shaped into a sheet. At this time, the temperature is cooled by using a cooling fan to 65 ~ 110 ℃, to prepare a vibration damping sheet with a thickness of 1 ~ 6mm.

Second Process (Waste Polyurethane Foam Sheet)

After collecting the waste polyurethane, it is washed with water, dried at 70-80 ° C. for about 2 hours in a dryer, and then pulverized to a size of 0.5-1 cm in diameter using a conventional pulverizer and mixed to obtain a uniform component and density. do. Then, a waste polyurethane foam sheet prepared by thermocompression bonding with a conventional thermocompressor was prepared.

3rd process (adhesion process)

The sound absorbing agent was prepared by laminating an acrylic adhesive between the vibration damping sheet prepared in the first step and the waste polyurethane foam sheet prepared in the second step, followed by pressing at room temperature with a press.

Experimental Example

Requested a test (inspection) from Korea Institute of Construction Materials, and conducted the following experiment.

Registration Number; GTE 03-0532, Applicant; Donghwa, sample name; Interlayer impact sound reduction material

Experimental object; Size 2.5m × 4.0m,

Experimental method; KS F 2865-'02

(Laboratory Measurement Method for Lightweight Impact Noise Reduction of Concrete Slab Finish Structure)

Temperature and humidity conditions; 19.5 ° C. Humidity 51%.

Test score result Remarks practice Conventional products Reduction Specification Floor Impact Level (dB) 100 Hz 57.6 62.2 4.6 125 Hz 50.0 61.1 11.1 160 Hz 52.8 64.8 12.0 200 Hz 55.1 68.7 13.6 250 Hz 54.9 67.9 13.0 315 Hz 52.1 69.6 17.5 400 Hz 47.9 68.5 20.6 500 Hz 44.5 70.0 25.5 630 Hz 40.8 70.2 29.4 1000 Hz 50.5 66.8 26.4 1250 Hz 47.6 63.1 25.5 1600 Hz 31.5 59.0 27.5 2000 Hz 29.0 53.5 24.5 2500 Hz 28.1 50.1 22.0 3150 Hz 25.5 43.9 18.4 4000 Hz 21.7 42.7 31.0 5000 Hz 18.7 39.4 20.7

As a result of the experiment as described above, it can be seen that the impact sound reduction effect is remarkably improved when the product of the present invention is applied. The results are shown.

Experimental Example 2

Experimental Overview The evaluation of the comparison of the sound insulation loss performance between the examples of the present invention and the conventional products was as follows.

Experimental item: In-house test of low frequency (2 ~ 1600Hz) and high frequency (1600 ~ 6400Hz) bands

Measuring instrument: Acoustic Duct (9301)

Definition of penetration loss

Ii = Ir + Ia + It

τ = It / Ii, a = I-Ir / I

Ii: intensity of incident sound, Ir: intensity of reflected sound, Ia: intensity of absorbed sound,

τ: transmittance, a: sound absorption

Therefore, the transmission loss means the intensity of noise that is absorbed in the material and is absorbed in the material and is reflected from the surface of the material or reflected from the surface of the material. The incident sound does not penetrate the material and is mostly absorbed or reflected, meaning a material having a large value of transmission loss.

In the law of mass

Transmission Loss (TL) = 18log (mf) -44 (db)

Where m is the surface density of the material (kg / m 2). f: frequency (Hz)

The sound insulation performance of the material is one of the most important influence factors. In the same material, the transmission loss is proportional to the specific gravity and the frequency of the wall material in the audible frequency band.

Asphalt sheet applied to the upper portion of the sound absorbing and insulating material according to an embodiment of the present invention is a high specific gravity of 1.65 ~ 1.7, it can be seen that the sound insulation performance superior to the conventional products consisting only of a foam material or a simple fiber layer containing a large amount of air layer there was.

In addition, the comparison between the present invention and other products in the low frequency band of FIG. 4 and the comparison between the present invention and other products in the entire band of FIG. 5 show that the products of the present invention have better sound absorption and sound insulation than the conventional products. Can

Hereinafter, the present invention will be described with reference to the drawings.

1 is a cross-sectional view of the present invention, Figures 2 and 3 are actual photographs of the present invention, Figure 4 is a comparison between the present invention and other products in the low frequency band, Figure 5 is a comparison between the present invention and other products in the entire band It shows that the damping sheet 1, the acrylic adhesive agent 2, and the recycled polyurethane foam sheet 3 were shown.

Looking at the structure, as shown in Figures 1 to 3, 20 to 40 parts by weight of blown asphalt (blowing asphalt) and 50 to 80 parts by weight of powder or flake inorganic filler, 1 to 5 parts by weight of adhesive, process oil 1 ~ 5 parts by weight, 5 to 10 parts by weight of synthetic rubber, 0.2-5 parts by weight of organic fiber filler and 1 to 4 parts by weight of quicklime, and an acrylic adhesive (2) formed under the vibration damping sheet (1). And a sound absorbing agent having a structure laminated with a recycled polyurethane foam sheet 3 formed under the acrylic adhesive 2.

As described above, the present invention is flexible and easily cut and processed, which can be processed in the field, and does not require adhesive tape, and is an eco-friendly material that recycles waste, and absorbs sound to maximize the impact sound reduction effect without structural changes such as buildings. And the structure that maximizes the sound insulation performance at the same time, by applying the asphalt sheet on the upper part to block the noise generated first, and by stacking the waste polyurethane foam on the lower part to control the structural vibration generated in the building secondary It is a sound absorbing and insulating material having excellent shock absorbing ability to simultaneously perform the role of blocking the impact sound generated by.

Claims (4)

In the sound absorbing and insulating material, 20 to 40 parts by weight of blown asphalt, 50 to 80 parts by weight of powdered or flaky inorganic filler, 1 to 5 parts by weight of adhesive, 1 to 5 parts by weight of process oil, 5 to 10 of synthetic rubber A vibration damping sheet (1) consisting of 0.2 to 5 parts by weight of a filler containing 1 part by weight of organic fibers and 1 to 4 parts by weight of quicklime, an acrylic adhesive (2) formed under the vibration damping sheet (1), and the acrylic adhesive (2) After collecting the waste polyurethane foam discarded from the car seat interior material, sofa, etc. in the lower part, it is washed and dried, and then crushed into a size of 0.5 ~ 1cm length with a grinder, and thermally compressed with a thermocompressor and regenerated in a conventional manner. Sound absorbing and insulating material, characterized in that the laminated polyurethane foam sheet (3). 1st process (manufacturing damping sheet) 20-40 parts by weight of blown asphalt, 50-80 parts by weight of powdered or flaky inorganic filler, 1-5 parts by pressure of adhesive, 1-5 parts by weight of process oil, 5-10 parts by weight of synthetic rubber, and organic fibers The composition was weighed at a composition ratio of 0.2 to 5 parts by weight of phosphorus filler and 1 to 4 parts by weight of quicklime, and then heated to 70 to 120 ° C. in a mixer, sufficiently stirred within 5 minutes, and extruded by an extruder to form a sheet. Mold. At this time, the temperature is cooled by using a cooling fan to 65 ~ 110 ℃, to prepare a vibration damping sheet with a thickness of 1 ~ 6mm, Second Process (Manufacture of Recycled Polyurethane Foam) After collecting the waste polyurethane foam which is discarded in the car seat interior material, sofa, etc., it is washed and dried, and then crushed into a size of 0.5 ~ 1cm length with a grinder, thermocompressed with a thermocompressor and cut into a desired size with a calender. After preparing and preparing a polyurethane foam sheet, 3rd process (adhesion process) A method of manufacturing a sound absorbing and insulating material, characterized in that the acrylic adhesive is applied between the vibration damping sheet and the waste polyurethane foam sheet prepared in the first and second steps, followed by room temperature bonding with a press. The method of claim 1, wherein the vibration damping sheet is prepared 20 to 40 parts by weight of blown asphalt (blowing asphalt), 50 to 80 parts by weight of the inorganic filler powder or flakes, 1 to 5 parts by weight of the adhesive, 1 to 5 parts by weight of the process oil 5 to 10 parts by weight of synthetic rubber, 0.2 to 5 parts by weight of organic fiber filler and 1 to 4 parts by weight of quicklime, were weighed, and then heated to 70 to 120 ° C. in a mixer. After stirring, it is extruded by an extruder and molded into a sheet. At this time, the temperature is cooled to 65 ~ 110 ℃ using a cooling 휀, the manufacturing method of the sound absorbing and insulating material characterized in that it is manufactured to a thickness of 1 ~ 6mm. The method of claim 2, wherein the production of the polyurethane foam sheet, after collecting the waste polyurethane product, washed with water, dried for about 2 hours at 70 ~ 80 ℃ in a dryer, 0.5 ~ 1cm in diameter with a conventional grinder After pulverizing to the size of the, heat compression with a conventional thermocompressor, and then cut to a desired size with a calender to produce a waste polyurethane foam sheet, characterized in that to produce a waste polyurethane foam sheet.

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