WO2015093689A1 - 성형성 및 외관이 우수한 흡차음재 및 이의 제조방법 - Google Patents
성형성 및 외관이 우수한 흡차음재 및 이의 제조방법 Download PDFInfo
- Publication number
- WO2015093689A1 WO2015093689A1 PCT/KR2014/002863 KR2014002863W WO2015093689A1 WO 2015093689 A1 WO2015093689 A1 WO 2015093689A1 KR 2014002863 W KR2014002863 W KR 2014002863W WO 2015093689 A1 WO2015093689 A1 WO 2015093689A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sound absorbing
- insulating material
- nonwoven fabric
- binder
- heat
- Prior art date
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Images
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Definitions
- the present invention relates to a sound absorbing and insulating material having excellent moldability and appearance and a method of manufacturing the same. More specifically, the present invention relates to a first nonwoven fabric having a heat resistant fiber as a main component and a first nonwoven fabric having a three-dimensional shape inside the first nonwoven fabric.
- An inner sound absorbing and insulating layer 1 made of a binder evenly distributed therein, and an outer sound absorbing and insulating layer 2 ', 2 ′′ made of a second nonwoven fabric mainly composed of heat resistant fibers. It has a structure that is laminated on one side or both sides of the inner sound absorbing and insulating layer, and the sound absorbing, flame retardant, heat resistance, heat shielding, and high temperature formability are excellent.
- the outer sound absorbing and insulating layer is formed.
- the present invention relates to a sound absorbing and insulating material and a method for producing the same, which are free from any fear of damaging the surface appearance of a molded article.
- Industrial fields that require sound absorbing and insulating materials may be representative of electric appliances such as air conditioners, refrigerators, washing machines, and lawn mowers, transportation equipment fields such as automobiles, ships, and airplanes, or construction materials fields such as wall materials and floor materials. .
- the use of sound absorbing and insulating materials in various industries is required.
- it is required to further reduce the weight, flame retardancy, heat resistance, heat insulation according to the application.
- flame retardancy and heat resistance may be required.
- aramid fibers are attracting attention as materials for sound absorbing and insulating materials having excellent heat resistance.
- Korean Laid-Open Patent Publication No. 2007-0033310 discloses a flame-retardant sound absorbing material in which a nonwoven fabric layer in which heat-resistant aramid short fibers and polyester thermoplastic short fibers are interlaced, and a skin layer made of a wet nonwoven fabric made of short aramid fibers are laminated. Is disclosed.
- Japanese Laid-Open Patent Publication No. 2007-0039826 discloses a water-repellent sound absorbing material in which a nonwoven fabric layer in which heat-resistant aramid short fibers or short aramid fibers and polyester thermoplastic short fibers are mixed, and a skin material layer treated with a water repellent are laminated.
- Japanese Laid-Open Patent Publication No. 2007-0138953 discloses a heat-resistant sound absorbing material in which a nonwoven fabric layer made of heat-resistant aramid fibers and a skin layer made of a fiber sheet containing heat-resistant aramid fibers are laminated.
- the sound absorbing material disclosed in the prior art has a structure in which a skin material layer is separately laminated in order to impart flame retardancy, water repellency, and the like to one side of the nonwoven fabric, and a thermo-pressure process for integrating two layers of the nonwoven fabric layer and the skin material layer is added. Should be carried out. Therefore, by performing the integration process separately, the process is not only complicated and cumbersome, but also a flame retardant, water repellent, etc. included as an additive during the heat pressure process may be burned to generate toxic gas, and thermal pressure may cause the internal structure of the nonwoven fabric to be absorbed by sound absorption. It can be a factor to lower the.
- the present inventors have studied for a long time to develop a new sound absorbing and insulating material having excellent sound absorption, flame retardancy, heat resistance, heat shielding properties as well as excellent moldability and surface appearance as a sound absorbing and insulating material.
- the binder penetrates into the inside of the nonwoven fabric having an irregular vent hole formed by the complicated three-dimensional labyrinth structure and hardens to maintain the three-dimensional shape inside the nonwoven fabric without blocking the vent hole, thereby including the sound absorbing properties of the nonwoven fabric.
- New sound-absorbing sound absorbing material that can achieve the effect of improving the efficiency, the effect of molding into a desired shape during the curing process of the binder, and the effect of preventing the binder impregnated in the first nonwoven fabric from leaking to the surface of the molded product.
- the present invention has been completed by the development.
- the present invention is excellent in sound absorption, flame retardancy, heat resistance, heat shielding, as well as the desired shape during the curing process of the binder impregnated in the non-woven fabric made of heat-resistant fibers, and the external sound absorbing and insulating layer is formed It is an object of the present invention to provide a sound absorbing and insulating material which is excellent in appearance and can reduce the contamination of a mold even after repeated molding.
- the present invention comprises the steps of impregnating and drying the first nonwoven fabric made of heat-resistant fibers in a binder to produce an inner sound absorbing and insulating layer, and the step of laminating a second nonwoven fabric made of heat-resistant fiber on one side or both sides of the inner sound absorbing and insulating layer.
- An object of the present invention is to provide a method for manufacturing a sound absorbing and insulating material comprising a.
- an object of the present invention is to provide a method for reducing the noise by applying the sound absorbing and insulating material to the noise generating device.
- Internal sound absorbing and insulating layer (1) comprising; And an outer sound absorbing and insulating layer 2 ', 2 " And a sound absorbing and insulating material having a structure in which the external sound absorbing and insulating layers 2 'and 2 ′′ are stacked on one or both surfaces of the internal sound absorbing and insulating layer 1.
- the present invention comprises the steps of: a) impregnating a binder solution with a first nonwoven fabric having a content of heat resistant fiber of 30 to 100% by weight; b) drying the impregnated first nonwoven fabric to form an internal sound absorbing and insulating layer (1); And c) laminating a second nonwoven fabric having a content of heat resistant fiber of 30 to 100% by weight on one or both surfaces of the inner sound absorbing and insulating layer 1 to form an outer sound absorbing and insulating layer 2 ', 2 ′′. Characterized in that the manufacturing method of the sound absorbing and insulating material comprising a.
- the present invention i) confirming the three-dimensional structure of the device that causes noise; ii) fabricating and molding the sound absorbing and insulating material so that at least part of the three-dimensional structure of the device coincides; And iii) adjoining the sound absorbing and insulating material to the noise generating device; Characterized by the noise reduction method of the noise generating device comprising a.
- the sound absorbing and insulating material of the present invention has an advantage that the binder is impregnated in the first nonwoven fabric made of heat-resistant fiber, so that the sound absorbing and insulating material is excellent in sound absorption, flame retardancy, heat resistance, and heat shielding ability, and the sound absorbing and insulating material can be three-dimensionally formed by the binder.
- the external sound absorbing and insulating layer made of the second nonwoven fabric is laminated on one or both surfaces of the internal sound absorbing and insulating layer, there is no fear that the binder included in the internal sound absorbing and insulating layer leaks to the surface during molding.
- the appearance of the molded article is excellent and does not contaminate the mold.
- the sound absorbing and insulating material of the present invention is prepared by further including a functional additive in the binder solution, there is an advantageous advantage in the process that does not need to laminate a separate skin material for imparting functionality to the sound absorbing and insulating material.
- the sound absorbing and insulating material of the present invention is excellent in flame retardancy, heat resistance and heat shielding at the same time in addition to the sound absorption, there is an advantage that the sound absorbing and insulating material is not deformed or modified even when applied to a silencer that is maintained at a high temperature of 200 °C or more.
- the sound absorbing and insulating material of the present invention has the advantage that it can be molded into a desired shape during the curing process of the thermosetting resin when using the thermosetting resin as a binder. That is, in the high temperature molding process for manufacturing the sound absorbing and insulating material, since the curing and molding of the thermosetting resin are simultaneously performed, a process simplification effect can be obtained.
- the heat-resistant fiber is used as the nonwoven fabric constituting the sound absorbing and insulating material of the present invention, even if a thermosetting resin is used as the binder, there is an advantage that the thermal deformation of the nonwoven fabric due to the heat of reaction generated during the heat curing process does not occur.
- the sound absorbing and insulating material of the present invention includes soundproofing, soundproofing or soundproofing including electric appliance fields such as air conditioners, refrigerators, washing machines, lawn mowers, transport equipment fields such as automobiles, ships, aircrafts, or building materials fields such as wall materials and flooring materials. It is useful as sound absorbing and insulating material in demanding fields.
- the sound absorbing and insulating material of the present invention is useful as a sound absorbing and insulating material for a noise-inducing device in which a high temperature of 200 ° C. or more is maintained.
- the sound absorbing and insulating material of the present invention when applied to the automobile field, it is fastened in close contact with a noise generating device such as an engine and an exhaust system of an automobile, or installed at a predetermined distance from the noise generating device, or applied to a noise generating device. It can be applied by molding into parts.
- FIG. 1 is a schematic view showing a cross-sectional structure of a sound absorbing and insulating material of the present invention.
- A is a cross-sectional structure of the sound absorbing and insulating material which laminated
- B is a cross-sectional structure of the sound absorbing and insulating material which laminated
- FIG. 2 is an electron micrograph (x300) of the first nonwoven fabric before and after being impregnated with the binder.
- A is a picture of the first nonwoven fabric before impregnated with the binder
- B is a picture of the nonwoven fabric impregnated with 20 parts by weight of the binder based on 100 parts by weight of the first nonwoven fabric
- C 100 parts by weight of the first nonwoven fabric The photograph is a nonwoven fabric impregnated with 50 parts by weight of binder.
- FIG. 3 is a schematic view showing an example in which the sound absorbing and insulating material is molded into parts and applied to a noise generating device of an automobile.
- A is a photograph of a sound absorbing and insulating material applied to an automobile engine
- B is a photograph showing an example of mounting the sound absorbing and insulating material to a part of the engine of the vehicle.
- Figure 4 is a schematic diagram showing an example in which the sound absorbing and insulating material is installed and applied at a certain distance from the noise generating device of the vehicle.
- A is a photograph of the sound absorbing and insulating material applied to the lower body of the vehicle
- B is a photograph showing an example of attaching the sound absorbing and insulating material to the lower body of the vehicle.
- 5 is a graph comparing the sound absorption performance of the sound absorbing and insulating material according to the density of the nonwoven fabric.
- FIG. 6 is a graph comparing the heat shield performance of the aluminum heat shield plate and the sound absorbing and insulating material of the present invention.
- the present invention relates to a sound absorbing and insulating material having excellent moldability and appearance and a method of manufacturing the same.
- the sound absorbing and insulating material of the present invention is excellent in sound absorption, flame retardancy, heat resistance and heat shielding properties, and can be molded into a desired three-dimensional shape by using a binder located on the same layer as the heat-resistant fiber nonwoven fabric, and the binder leaks to the surface during the molding process. It is excellent in that there is no fear of damaging the appearance of the molded article.
- the present invention comprises a first nonwoven fabric having a content of a heat resistant fiber of 30 to 100% by weight, and is contained in the same layer as the first nonwoven fabric to maintain a three-dimensional shape inside the nonwoven fabric.
- An internal sound absorbing and insulating layer 1 including a binder; And an outer sound absorbing and insulating layer 2 ', 2 " And a sound absorbing and insulating material having the external sound absorbing and insulating layers 2 ', 2 " laminated on one or both surfaces of the internal sound absorbing and insulating layer 1.
- the lamination between the inner sound absorbing and insulating layer and the outer sound absorbing and insulating layer is made by adhesive, heat or pressure.
- an adhesive is applied to one surface of the second nonwoven fabric, and the surface to which the adhesive is applied is laminated by contacting the inner sound absorbing and insulating layer.
- the adhesive used for lamination between the inner and outer sound absorbing and insulating layers is selected from a binder contained in the first nonwoven fabric.
- said adhesive is selected from thermosetting resins.
- the heat-resistant fiber has a limiting oxygen index (LOI) of 25% or more and a heat resistance temperature of 150 ° C or more.
- LOI limiting oxygen index
- the heat-resistant fiber is aramid fiber, polyphenylene sulfide (PPS) fiber, oxidized polyacrylonitrile (OXI-PAN) fiber, polyimide (PI) fiber, polybenzimidazole (PBI) fibers, polybenzoxazole (PBO) fibers, polytetrafluoroethylene (PTFE) fibers, polyketone (PK) fibers, metal fibers, carbon fibers, glass fibers, basalt fibers, silica fibers, and ceramic fibers It is one or more selected.
- PPS polyphenylene sulfide
- OXI-PAN oxidized polyacrylonitrile
- PI polyimide
- PBI polybenzimidazole
- PBO polybenzoxazole
- PTFE polytetrafluoroethylene
- PK polyketone
- the heat-resistant fiber is aramid fiber.
- the first nonwoven fabric or the second nonwoven fabric is made of aramid fibers having a fineness of 1 to 15 denier and is a single layer nonwoven fabric having a thickness of 3 to 20 mm.
- the density of the first nonwoven fabric or the second nonwoven fabric is 100-2000 g / m 2.
- the density of the first nonwoven fabric or the second nonwoven fabric is 200-1200 g / m 2.
- the inner sound absorbing and insulating layer is a single layer structure consisting of one layer, or two or more inner sound absorbing and insulating layer is a multilayer structure.
- the binder is a thermosetting resin.
- thermosetting resin is an epoxy resin capable of forming a three-dimensional network structure in the internal structure of the first nonwoven fabric.
- the epoxy resin is bisphenol A diglycidyl ether, bisphenol B diglycidyl ether, bisphenol AD diglycidyl ether, bisphenol F diglycidyl ether, bisphenol S di Among glycidyl ether, polyoxypropylene diglycidyl ether, bisphenol A diglycidyl ether polymer, phosphazene diglycidyl ether, bisphenol A novolac epoxy, phenol nolac epoxy resin, and o-cresol nolac epoxy resin At least one epoxy resin selected.
- FIG. 1 is a view schematically showing a cross-sectional structure of a sound absorbing and insulating material according to the present invention.
- a second nonwoven fabric is laminated on one surface of the inner sound absorbing and insulating layer 1 including the first nonwoven fabric and a binder with an adhesive layer interposed therebetween to form an outer sound absorbing and insulating layer 2 '.
- FIG. 1B two second nonwoven fabrics are laminated on both surfaces of the internal sound absorbing and insulating layer 1 including the first nonwoven fabric and the binder with an adhesive layer interposed therebetween, and thus the external sound absorbing and insulating layers 2 'and 2 are formed.
- 2 (A) is an electron micrograph showing the internal structure of the first nonwoven fabric before impregnating the binder, and it can be seen that heat-resistant fiber yarns cross each other to form an irregular vent hole.
- 2 (B) and (C) is an electron micrograph after impregnating the binder in the first nonwoven fabric, it can be confirmed that the binder is finely distributed and attached to the heat-resistant fiber yarn as a whole, the content of the binder increases When the yarn surface is found to contain a larger amount of binder.
- the fibers are arranged in a randomly three-dimensional manner.
- the pore structure within the nonwoven fabric thus forms a highly complex labyrinth system that is three-dimensionally connected by regular or irregular fiber arrays, rather than by individual bundles of capillary tubes. That is, in the nonwoven fabric used in the present invention, a microcavity is irregularly formed by crossing a coarse yarn containing heat-resistant fibers.
- the binder When the nonwoven fabric is impregnated with the binder, the binder is present on the surface of the nonwoven fabric yarn including the heat-resistant fiber finely and evenly and is attached to form a ventilation hole having a finer size than the nonwoven fabric before impregnation.
- the formation of finer ventilation holes in the internal structure of the nonwoven fabric means that the resonance of the noise is increased, thereby improving the sound absorbing and insulating characteristics.
- the binder used is cured while forming a three-dimensional network structure by itself, since more fine vent holes may be formed inside the nonwoven fabric, sound absorbing and insulating characteristics may be further improved.
- the binder is uniformly infiltrated into the nonwoven fabric to maintain the original three-dimensional shape of the nonwoven fabric, and additionally, the micro ventilator may be formed more by hardening of the binder. More and more various noise resonance within the noise increases the effect of extinction, and the efficiency of extinction of the noise is maximized, the sound absorption performance is greatly improved.
- the internal sound absorbing and insulating layer of the present invention has a binder evenly distributed on the surface of the heat-resistant fiber yarn constituting the nonwoven fabric.
- heat resistant fibers are used as the main fibers constituting the first nonwoven fabric or the second nonwoven fabric.
- Heat-resistant fiber can be applied to any material that has excellent durability to withstand high temperature and ultra high temperature conditions.
- the heat resistant fiber has a limiting oxygen index (LOI) of 25% or more and a heat resistance temperature of 150 ° C or more.
- LOI limiting oxygen index
- LOI limiting oxygen index
- the heat resistant fiber a limiting oxygen index of 25 to 80% and a heat resistance temperature of 150 to 3000 ° C are used.
- a limiting oxygen index (LOI) of 25 to 70% and a heat resistance temperature of 200 to 1000 ° C are used.
- the heat resistant fiber is preferably 1 to 15 deniers, preferably 1 to 6 deniers, and a yarn having a length of 20 to 100 mm, preferably 40 to 80 mm.
- Superfibers are specifically aramid fibers, polyphenylenesulfide (PPS) fibers, oxidized polyacrylonitrile (OXI-PAN) fibers, polyimide (PI) fibers, polybenzimidazole (PBI) fibers, polybenzoxazoles (PBO) fibers, polytetrafluoroethylene (PTFE) fibers, polyketone (PK) fibers, metal fibers, carbon fibers, glass fibers, basalt fibers, silica fibers, ceramic fibers and the like may be included.
- PPS polyphenylenesulfide
- OFI-PAN oxidized polyacrylonitrile
- PI polyimide
- PBI polybenzimidazole
- PBO polybenzoxazoles
- PTFE polytetrafluoroethylene
- PK polyketone
- aramid fibers are preferably used as heat-resistant fibers.
- meta-aramid, para-aramid or a mixture thereof may be used as the heat resistant fiber.
- the aramid fiber to be used as the yarn of the nonwoven fabric has a fineness of 1 to 15 deniers, preferably 1 to 6 deniers.
- the length of the yarn is preferably 20 to 100 mm, preferably 40 to 80 mm. If the length of the yarn is too short, the yarn may become difficult to entangle during needle punching, and the binding force of the nonwoven fabric may be weakened. Although the binding force of the nonwoven fabric is excellent, there may be a problem that the yarn transfer is not smooth when carding.
- Aramid fibers are aromatic polyamide fibers having a structure in which aromatic rings such as benzene rings are bonded to each other by amide groups. To distinguish it from aliphatic polyamides (eg nylon), aromatic polyamide fibers are called 'Aramide'. Aramid fibers are made of aromatic polyamide spinining, and are classified into m-Aramid and para-Aramid according to the position of amide bond bonded to the aromatic ring.
- Meta-aramid (m-Aramid) represented by the formula (1) is isophthaloyl chloride (Isophthaloyl chloride) and meta-phenylene diamine (m-phenylene diamine) dissolved in dimethylacetamide (DMAc) solvent using dry spinning It is manufactured by.
- Meta-aramid has a relatively high elongation at break of 22-40% due to the flexible polymer structure, and it is advantageous in dyeing as it can be dyed.
- Such meta-aramids are commercially available under the trade names of Nomex (Dome), Conex TM (Teijin).
- Para-aramid (p-Aramid) represented by the formula (2) is dissolved after terephthaloyl chloride (Terephthaloyl chloride) and para-phenylene diamine (p-phenylene diamine) in N-methylpyrrolidone (NMP) solvent It is made using spinning.
- Para-aramid has high strength due to its linear highly oriented molecular structure, and is used as reinforcement or protective material because it is 3 to 7 times higher than meta-aramid.
- para-aramid has strong chemical resistance, low heat shrinkage, excellent shape stability, high cutting strength, flame resistance and self extinguish.
- Such para-aramid is commercially available under the trademarks of Kevlar TM (DuPont), Twaron TM (Tijin) and Technora TM (Teijin).
- the aramid is provided as a product such as filament, staple, yarn, etc., and the strength reinforcement material (transformer, motor, etc.), insulation material (insulation paper, insulation tape, etc.), heat resistant fiber ( Firefighting suits, fire protection gloves, etc.) and high temperature filters.
- the nonwoven fabric constituting the sound absorbing and insulating material of the present invention is characterized in that it uses substantially heat-resistant fiber as a yarn, but by including other fibers in the yarn of the heat-resistant fiber in order to reduce the cost, light weight, and functionality of the nonwoven fabric.
- the nonwoven fabric produced may also be included in the scope of the present invention. That is, although the nonwoven fabric of the present invention is manufactured using heat-resistant fibers as a yarn, it does not mean that it is never limited to non-woven fabric consisting of heat-resistant fibers only. If the content of the heat-resistant fiber yarn included in the nonwoven fabric of the present invention, 30 to 100% by weight, more preferably 60 to 100% by weight based on the weight of the nonwoven fabric may be included.
- the internal sound absorbing and insulating layer constituting the sound absorbing and insulating material of the present invention includes a binder contained in the form of maintaining the three-dimensional shape inside the nonwoven fabric is located on the same layer as the nonwoven fabric. Therefore, the present invention can be used as a binder of any material that can maintain the three-dimensional shape inside the nonwoven fabric as the binder.
- the term 'form that maintains the three-dimensional shape inside the nonwoven fabric' means that when the binder is impregnated with the nonwoven fabric, the binder is uniformly distributed on the surface of the fiber yarn of the nonwoven fabric so as to maintain or form an irregular vent hole structure. It is meant to maintain the original three-dimensional internal shape of the nonwoven fabric.
- the binder refers to a material used for adhesion or bonding between two materials, but the binder in the present invention refers to a material impregnated with a nonwoven fabric made of heat resistant fiber.
- thermoplastic resin or a thermosetting resin can be considered as a binder material.
- the polyamide-based resin represented by the thermoplastic resin has a crystalline polar group like the aramid fiber represented by the heat resistant fiber. Therefore, when the thermoplastic binder is impregnated into the nonwoven fabric of the thermoplastic heat-resistant fiber, surface contact is made by the crystalline polar groups similar to each other, so that a hard boundary layer is formed at these contacts to partially block the vent holes of the nonwoven fabric. That is, when the thermoplastic resin is used as the binder impregnated into the nonwoven fabric made of heat-resistant fibers, the sound absorbing performance is reduced while the vent holes of the nonwoven fabric are partially blocked.
- the sound insulation performance may be expected to be improved, but the blocked noise is not dissipated inside the nonwoven fabric, but the sound is transmitted through another path, so that impregnation of the thermoplastic binder also improves the sound insulation performance. Can't expect In addition, when impregnating the thermoplastic binder in the non-woven fabric of the inorganic heat-resistant fiber, since the adhesive strength between them is weak, a separate adhesive additive should be used.
- thermosetting binders are heterogeneous materials having completely different physicochemical properties compared to thermoplastic heat resistant fibers.
- thermosetting binder when the thermosetting binder is impregnated into the non-woven fabric of the thermoplastic heat-resistant fiber, because the boundary layer is formed in line contact due to the heterogeneous characteristics of the non-woven fabric, the ventilation holes of the nonwoven fabric are present in the open state. That is, when a thermosetting resin is used as a binder impregnated into a nonwoven fabric made of heat resistant fibers, it is possible to maintain a three-dimensional shape inside the nonwoven fabric. Therefore, in the present invention, a thermosetting resin can be preferably used as the binder.
- thermosetting resin has a property of being cured by light, heat or a curing agent, and its shape does not deform even under high temperature conditions. Therefore, according to the present invention, the heat-resistant fiber and the thermosetting binder may be formed under specific conditions, thereby obtaining the effect of maintaining the molded shape even at a high temperature after the molding. Therefore, when the thermosetting resin is used as the binder impregnated in the nonwoven fabric, not only the molding can be performed in a desired shape during the curing process of the resin, but also an additional effect of maintaining the molded shape even at high temperature can be expected.
- thermosetting resin when used as the binder to be impregnated into the nonwoven fabric made of heat-resistant fibers, in addition to the effect of maintaining the three-dimensional shape inside the nonwoven fabric, the effect of forming into a desired shape during the curing reaction of the binder resin can also be expected. have.
- Epoxy resin is a kind of thermosetting resin and has a property of being cured by a high molecular material having a three-dimensional network structure upon curing. Therefore, when the epoxy resin penetrates into the internal structure of the nonwoven fabric and hardens, it forms another ventilation hole due to the formation of the network itself, so that more fine ventilation holes can be formed inside the nonwoven fabric, so that the sound absorbing performance is further improved. Can be.
- the curing reaction proceeds in the presence of a curing agent can form a more advanced three-dimensional network structure, the sound absorption effect can be further improved. That is, functional groups such as epoxy groups or hydroxy groups in the epoxy resin and amine groups and carboxylic acid groups in the curing agent react with each other to form crosslinks through covalent bonds to form three-dimensional network polymers.
- the curing agent not only acts as a catalyst for promoting the curing reaction, but also participates in the direct reaction and is connected in the molecule of the epoxy resin. Therefore, it is possible to control the size and physical properties of the vent hole in the selection of the curing agent.
- the epoxy resins include bisphenol A diglycidyl ether, bisphenol B diglycidyl ether, bisphenol AD diglycidyl ether, bisphenol F diglycidyl ether, bisphenol S diglycidyl ether, polyoxypropylene digly One or more selected from cylyl ether, bisphenol A diglycidyl ether polymer, phosphazene diglycidyl ether, bisphenol A novolac epoxy, phenol noblock epoxy resin, o-cresol noblock epoxy resin and the like can be used. It is more preferable to use an epoxy equivalent of 70-400 as said epoxy resin.
- the reason is that if the epoxy equivalent is too small, the adhesion between the molecules for forming the three-dimensional network structure or the adhesion of the heat-resistant fiber is low, which can be a factor to lower the physical properties of the sound absorbing and insulating material. On the other hand, if the epoxy equivalent is too high to form an excessively dense network structure, the sound absorption may be lowered.
- the curing agent when a thermosetting resin is used as the binder, the curing agent may be included in the binder solution.
- the curing agent it is preferable to use a compound having a functional group that is easily reacted with an epoxy group or a hydroxy group as a functional group bonded to a binder.
- aliphatic amines, aromatic amines, acid anhydrides, ureas, amides, imidazoles and the like can be used.
- the curing agent examples include diethyltoluene diamine (DETDA), diaminodiphenylsulfone (DDS), boron trifluoride monoethylamine (BF 3 ⁇ MEA), diaminocyclohexane (DACH), methyltetrahydrophthalic acid
- DETDA diethyltoluene diamine
- DDS diaminodiphenylsulfone
- BF 3 ⁇ MEA boron trifluoride monoethylamine
- DACH diaminocyclohexane
- MTHPA methyl-5-norbornene-2,3-dicarboxylic anhydride
- NMA methyl-5-norbornene-2,3-dicarboxylic anhydride
- Dicy dicyandiamide
- 2-ethyl-4-methyl-imidazole and the like can be used. have.
- aliphatic amines or amides are used as the curing agent, and they are relatively rich in crosslinking properties and are excellent in chemical resistance and weather resistance.
- dicyandiamide Dicy
- Dicyandiamide has a melting point of more than 200 °C high storage stability even after compounding in the epoxy resin can ensure a sufficient working time until curing and molding.
- the catalyst which accelerates hardening of the thermosetting resin used as a binder can also be used.
- the catalyst one or more selected from urea, dimethylurea, tetraphenylborate salt of quaternary DBU, quaternary phosphonium bromide, and the like may be used.
- the catalyst can be used together in a solution containing a binder.
- additives such as flame retardants, heat resistance improvers, water repellents, and the like may be used for the purpose of imparting functionality to the sound absorbing and insulating material. Since the additive is used in the binder solution, it is not necessary to laminate a separate skin material for imparting functionality to the sound absorbing and insulating material.
- the flame retardant may specifically use one or more selected from melamine, melamine cyanurate, melamine polyphosphate, phosphazene, ammonium polyphosphate, and the like. More preferably, melamine is used as a flame retardant, which can be expected to improve the flame retardancy and heat resistance at the same time.
- alumina, silica, talc, cray, glass powder, glass fiber, metal powder, or the like may be used.
- At least one selected from fluorine and the like may be used.
- additives commonly used in the art may be selected and used appropriately for the purpose.
- the internal sound absorbing and insulating layer may be applied in a single layer structure composed of one layer, or two or more internal sound absorbing and insulating layers are laminated. It may be applied to a multi-layered structure. In order to control the overall thickness of the sound absorbing and insulating material or to increase sound absorbing and insulating property, the internal sound absorbing and insulating layer may be applied in a single layer or a multilayered form. In the present invention, there is no particular limitation on the internal sound absorbing and insulating layer having a single layer or a multilayer structure. .
- an outer sound absorbing and insulating layer made of a second nonwoven fabric having a heat resistant fiber content of 30 to 100% by weight is laminated on one or both surfaces of the inner sound absorbing and insulating layer.
- the outer sound absorbing and insulating layer is laminated on the outer surface of the inner sound absorbing and insulating layer, the binder contained in the inner sound absorbing and insulating layer leaks to the surface during molding process, so as to damage the appearance of the molded article, or due to the binder during repeated molding The risk of contamination of the mold was prevented.
- an adhesive layer including an adhesive may be designed and laminated between layers by lamination, or may be laminated by heat, pressure, or the like.
- an adhesive may be applied to one surface of the second nonwoven fabric, and the surface on which the adhesive is applied may be laminated on the inner sound absorbing and insulating layer.
- any adhesive may be used as long as the adhesive is commonly used in the art. Since the binder used by the present invention is impregnated into the sound absorbing and insulating layer also has adhesive properties, at least one selected from the above binders may be used as the adhesive.
- the binder In using the binder as an adhesive, it is preferable to use a thermosetting resin because it is expected to express a stronger adhesive effect because it has a property of being cured by heat added during molding.
- the adhesive is an epoxy resin.
- the present invention in terms of the amount of the adhesive is not particularly limited, and can be appropriately adjusted within the allowable content range for adhesion between the layers.
- the present invention comprises the steps of: a) impregnating a binder solution with a first nonwoven fabric having a content of heat resistant fiber of 30 to 100% by weight; b) drying the impregnated first nonwoven fabric to form an internal sound absorbing and insulating layer (1); And c) laminating a second nonwoven fabric having a content of heat resistant fiber of 30 to 100% by weight on one or both surfaces of the inner sound absorbing and insulating layer 1 to form an outer sound absorbing and insulating layer 2 ', 2 ′′. Characterized in that the manufacturing method of the sound absorbing and insulating material comprising a.
- Step a) is a step of impregnating the first non-woven fabric made of heat-resistant fibers in the binder solution.
- the first nonwoven fabric is impregnated into a binder to improve sound absorption and sound insulation characteristics, as well as to be molded into a sound absorbing and insulating material having a desired shape.
- the binder solution impregnated with the first nonwoven fabric includes a curing agent, a catalyst, a conventional additive, and a solvent in addition to the binder resin.
- the binder, the curing agent, the catalyst, and the usual additives included in the binder solution are as defined above.
- at least one selected from ketones, carbonates, acetates, cellosolves, and the like may be used as the solvent used in the preparation of the binder solution.
- the solvent is selected from acetone, methyl ethyl ketone (MEK), methyl isobutyl ketone (MIBK), dimethyl carbonate (DMC), ethyl acetate, butyl acetate, methyl cellosolve, ethyl cellosolve, butyl cellosolve, and the like. 1 or more types can be used.
- the binder solution used in the present invention preferably comprises 1 to 60% by weight of the binder and the remaining amount of solvent.
- the binder solution used in the present invention can be used by including other additives, including a curing agent and a catalyst.
- the binder solution may include 1 to 60 wt% of the binder, 0.1 to 10 wt% of the curing agent, 0.01 to 5 wt% of the catalyst, 1 to 40 wt% of the additive, and the remaining amount of the solvent.
- the binder solution may comprise 1 to 30% by weight of binder, 0.1 to 10% by weight of curing agent, 0.01 to 5% by weight of catalyst, 1 to 30% by weight of flame retardant as an additive, and 40 to 95% by weight of solvent. .
- the binder solution of the present invention can adjust the degree of impregnation of the nonwoven fabric by adjusting the concentration, it is preferable to prepare and use at a concentration of 1 to 60% by weight, more preferably 20 to 50% by weight based on the solid content.
- concentration of the binder solution is too dilute, the binder content impregnated in the nonwoven fabric is small, so that the desired effect of the present invention cannot be obtained. If the binder solution is too thick, the nonwoven fabric is hardened and cannot function as a sound absorbing and insulating material.
- the additive may be one or more selected from additives commonly used in the art, including flame retardants, heat resistance improvers, water repellents and the like. These additives can be used by appropriately adjusted according to the purpose of the addition, if the content is less than the range of the addition effect is weak, the use beyond the above range is less economical and may cause other side effects.
- step b) the impregnated first nonwoven fabric is dried to form an internal sound absorbing and insulating layer.
- Drying in this invention consists of taking out the 1st nonwoven fabric impregnated into the binder solution, and removing a solvent. At this time, an appropriate temperature and pressure may be given.
- the drying process may include a step of taking out the impregnated nonwoven fabric and compressing it at a pressure of 1-20 kgf / cm 2 to control the binder content in the nonwoven fabric.
- the drying step may include a step of taking out the impregnated nonwoven fabric and evaporating the solvent while heating to a temperature of 70 ⁇ 200 °C.
- the drying process may be carried out to take out the impregnated non-woven fabric and to press the pressure of 1 ⁇ 20 kgf / cm 2 and the step of evaporating while heating to a temperature of 70 ⁇ 200 °C.
- Drying of the present invention is a process of adjusting the binder content in the nonwoven fabric, and can be said to be an important process of controlling the physical properties of the sound absorbing and insulating material. That is, the content of the binder contained in the nonwoven fabric after drying is an important factor for controlling the size, shape, and distribution of the ventilation holes inside the sound absorbing and insulating material, and thus, the scratch and mechanical properties of the sound absorbing and insulating material can be controlled.
- the final content of the binder contained in the nonwoven fabric through the drying process can be adjusted to 1 to 300 parts by weight, more preferably 30 to 150 parts by weight based on 100 parts by weight of the nonwoven fabric.
- a second nonwoven fabric having a heat resistant fiber content of 30 to 100% by weight is laminated on one or both surfaces of the inner sound absorbing and insulating layer to form an outer sound absorbing and insulating layer. That is, by laminating an outer sound absorbing and insulating layer made of non-woven fabric on one or both surfaces of the inner sound absorbing and insulating layer, a binder included in the inner sound absorbing and insulating layer flows out to the outer surface during the molding process, thereby spoiling the appearance of the molded article or repeatedly molding To avoid the risk of contamination of the mold by the binder during the process.
- the lamination may be laminated by adhesion, or may be laminated through heat, pressure, or the like.
- an adhesive may be applied to one surface of the external sound absorbing and insulating layer, and the surface on which the adhesive is applied may be laminated on the internal sound absorbing and insulating layer.
- the present invention includes a method of manufacturing a sound absorbing and insulating material further comprising the step (d step) of manufacturing a sound absorbing and insulating material by molding the laminated sound absorbing and insulating material at a high temperature after step c).
- the method of manufacturing a sound absorbing and insulating material includes a) impregnating a binder solution with a first nonwoven fabric having a content of heat resistant fiber of 30 to 100% by weight; b) drying the impregnated first nonwoven fabric to form an internal sound absorbing and insulating layer (1); c) laminating a second nonwoven fabric having a content of heat resistant fiber of 30 to 100% by weight on one or both sides of the inner sound absorbing and insulating layer 1 to form an outer sound absorbing and insulating layer 2 ', 2 ′′; And d) forming a sound absorbing and insulating material by molding at high temperature. It includes.
- Step d) is a step of forming at a high temperature after laminating the inner sound absorbing and insulating layer.
- the high temperature forming process is a process in which the curing reaction of the thermosetting binder is also considered, and the forming temperature is maintained at 150 to 300 ° C, more preferably at 170 to 230 ° C.
- the present invention is a method of manufacturing a sound absorbing and insulating material further comprising the step (a-1) of forming a first nonwoven fabric or a second nonwoven fabric by a needle punching process using the heat-resistant fibers before step a). It features. For example, in the step a-1, a nonwoven fabric having a thickness of 3 to 20 mm is formed by a needle punching process using heat resistant fibers having a fineness of 1 to 15 deniers.
- a-1) agent having a thickness of 3 to 20 mm by a needle punching process using heat resistant fibers having a fineness of 1 to 15 deniers.
- first nonwoven or a second nonwoven Forming a first nonwoven or a second nonwoven; a) impregnating a binder solution with a first nonwoven fabric having a content of heat resistant fiber of 30 to 100% by weight; b) drying the impregnated first nonwoven fabric to form an internal sound absorbing and insulating layer (1); And c) laminating a second nonwoven fabric having a content of heat resistant fiber of 30 to 100% by weight on one or both surfaces of the inner sound absorbing and insulating layer 1 to form an outer sound absorbing and insulating layer 2 ', 2 ′′. It may be made, including.
- the manufacturing method of the sound absorbing and insulating material according to the present invention comprising the step a-1), for example, a-1) thickness of 3 to 20 mm by needle punching process using heat-resistant fibers having a fineness of 1 to 15 denier.
- a phosphorous first nonwoven or a second nonwoven Forming a phosphorous first nonwoven or a second nonwoven; a) impregnating a binder solution with a first nonwoven fabric having a content of heat resistant fiber of 30 to 100% by weight; b) drying the impregnated first nonwoven fabric to form an internal sound absorbing and insulating layer (1); And c) laminating a second nonwoven fabric having a content of heat resistant fiber of 30 to 100% by weight on one or both surfaces of the inner sound absorbing and insulating layer 1 to form an outer sound absorbing and insulating layer 2 ', 2 ′′. And d) forming a sound absorbing and insulating material by molding at high temperature. It may be made, including.
- the nonwoven fabric of the present invention used for the inner sound absorbing and insulating layer is a nonwoven fabric having a content of 30 to 100% by weight of the heat-resistant fiber produced through the needle punching (Needle Punching) process.
- the sound absorbency may vary depending on the thickness and density of the nonwoven fabric, and the sound absorbency is expected to increase as the thickness and density of the nonwoven fabric increase.
- the thickness of the first nonwoven fabric or the second nonwoven fabric is preferably 3 to 20 mm.
- the weight of the nonwoven fabric is preferably from 100 to 2000 g / m 2, preferably from 200 to 1200 g / m 2, more preferably from 300 to 800 g / m 2, in consideration of performance and cost.
- the aramid nonwoven fabric is formed by carding (Carding) laminated 30 ⁇ 100 g / m2 web in 2-12 ply successively primary up-down preneedling, secondary down-up needling (Down-up needling), 3rd up-down needling (continuous process) forms the physical entanglement for controlling the required thickness, securing the necessary binding force and realizing the required physical properties.
- the needle (needle) using a barb type needle (working blade) is 0.5 ⁇ 3 mm
- the needle length (distance from crank outside to the point) is 70 ⁇ 120 mm. It is preferable that needle stroke is 30-350 times / m ⁇ 2>.
- the fineness of the nonwoven fabric is 1.5 to 8.0 denier
- the thickness of the pile forming layer is 6 to 13 mm
- the number of needle strokes is 120 to 250 times / m 2
- the density of the nonwoven fabric is 300 to 800 g / m 2.
- vent holes having a size of 1 to 100 ⁇ m were distributed in the sound absorbing and insulating material of the present invention, and these vent holes were regularly or irregularly distributed at intervals of 0.1 to 500 ⁇ m.
- the invention comprises the steps of: i) identifying the three-dimensional structure of the device that causes noise; ii) fabricating and molding the sound absorbing and insulating material so that at least part of the three-dimensional structure of the device coincides; And iii) adjoining the sound absorbing and insulating material to the noise generating device; Characterized by a noise reduction method of the noise generating device comprising a.
- the term "device” means a device that generates noise, including a motor, an engine, an exhaust system, and the like, and the apparatus of the present invention is not limited to the motor, engine, and exhaust system. Some or all of the three-dimensional structure of the device may be manufactured and used. Since the sound absorbing and insulating material of the present invention has the advantage of being able to be molded during the curing process of the binder, the sound absorbing and insulating material can be molded and manufactured so that some or all of the three-dimensional structure of the apparatus is matched.
- the term "adjacent" as used herein means to be applied in close contact with the noise generating device, or to be installed at a predetermined distance from the noise generating device, or to be molded and applied to a component applied to the noise generating device.
- the adjacency in this invention also includes attaching to the member (for example, another sound absorbing and insulating material) couple
- FIG. 3 and 4 schematically illustrate a representative example in which the sound absorbing and insulating material of the present invention is applied to a noise generating device of an automobile.
- FIG. 3 is a schematic view showing an example in which the sound absorbing and insulating material is molded into parts to be applied to a noise generating device of a vehicle
- (A) is a photograph of a sound absorbing and insulating material applied to an automobile engine
- (B) is a sound absorbing and insulating material used in a vehicle. This picture shows an example of mounting on a part of the engine.
- FIG. 4 is a schematic diagram showing an example in which the sound absorbing and insulating material is installed and applied to a noise generating device of an automobile, and is a photograph of a molded sound absorbing and insulating material applied to a lower portion of a vehicle body, and (B) shows a sound absorbing and insulating material as a lower portion of a vehicle body. This is a picture showing an example attached to.
- the sound absorbing and insulating material of the present invention is impregnated with a binder to maintain the internal three-dimensional shape of the nonwoven fabric, and has excellent sound absorption, flame retardancy, heat resistance, and heat shielding, so that a high temperature of 200 ° C. as well as room temperature is maintained. Even if directly applied to the present invention can exhibit the natural sound absorbing and sound-proofing effect does not occur.
- the external sound absorbing and insulating layer made of the second nonwoven fabric having no binder impregnated is laminated on the surface of the sound absorbing and insulating material, even if the binder contained in the internal sound absorbing and insulating layer leaks during the molding process, all of the external sound absorbing and insulating layer is impregnated to the external surface. Since the molded article does not leak, the appearance of the molded article is good, and there is no fear of contaminating the mold by the binder. Therefore, the molded article having excellent appearance can be obtained by repeated molding.
- Example 1 Preparation of sound absorbing and insulating material laminated on both sides
- the aramid first nonwoven fabric prepared above was impregnated with 1 dip 1 nip (Pick-up 300%) in a binder solution.
- the binder solution is 8% by weight of bisphenol A diglycidyl ether, 2% by weight of bisphenol A diglycidyl ether polymer, 0.2% by weight of dicyanidiamide, 0.02% by weight of dimethylurea, 10% by weight of melamine cyanurate, dimethyl
- the composition comprises 79.78% by weight of carbonate.
- the impregnated nonwoven fabric was taken out of the binder solution and compressed using a roller at 8 kgf / cm 2 pressure, and then the primary drying oven (100 ° C), the secondary drying oven (120 ° C) and the tertiary drying oven (150 ° C) were It dried by passing through at a speed of 5 m / min.
- An internal sound absorbing and insulating layer was prepared by adjusting the content of the binder to 50 parts by weight based on 100 parts by weight of the dried nonwoven fabric.
- the adhesive solution has a composition of 16% by weight of bisphenol A diglycidyl ether, 4% by weight of bisphenol A diglycidyl ether polymer, 0.2% by weight of dicyandiamide, 0.02% by weight of dimethylurea, and 79.78% by weight of dimethyl carbonate.
- the two felts were laminated on both sides of the inner sound absorbing and insulating layer prepared in 2), but the felt surface coated with adhesive was laminated so as to contact the inner sound absorbing and insulating layer. And it shape
- Aramid nonwoven fabric having a density of 300 g / m 2 and a thickness of 6 mm was prepared by the same needle punching process as in Example 1.
- Aramid nonwoven fabric having a density of 300 g / m 2 and a thickness of 6 mm was prepared by the same needle punching process as in Example 1. Then, the coating amount of the epoxy resin on the surface of the nonwoven fabric was coated so that the binder content is 50 parts by weight based on 100 parts by weight of the nonwoven fabric and dried at 150 ° C., and then molded.
- the coating solution on the nonwoven surface is 8% by weight of bisphenol A diglycidyl ether, 2% by weight of bisphenol A diglycidyl ether polymer, 0.2% by weight of dicyandiamide, 0.02% by weight of dimethylurea, 10% by weight of melamine cyanurate.
- dimethyl carbonate has a composition of 79.78% by weight.
- An aramid nonwoven fabric having a density of 300 g / m 2 and a thickness of 6 mm was prepared by the same needle punching process as in Example 1, and then impregnated, dried, and molded into a binder solution.
- thermoplastic resin solution having a composition of 10% by weight of polyethylene resin, 10% by weight of melaminecyanurate, and 80% by weight of dimethyl carbonate (DMC) was prepared and used.
- PET polyethylene terephthalate
- the PET nonwoven fabric of Comparative Example 4 was thermally deformed by the reaction heat generated during the epoxy curing process, and was completely deformed in the drying and thermoforming process, thereby making it impossible to form the desired shape.
- the physical properties of the sound absorbing and insulating material were measured and compared by the following method.
- the durability of the sound absorbing and insulating material was evaluated by the thermal cycle test method. After carrying out 5 cycles with the following conditions as 1 cycle, durability was judged.
- the flame retardancy of the sound absorbing and insulating material was measured by the ISO 3795 flammability test method.
- the incombustibility of the sound absorbing and insulating material was measured by the UL94 vertical flame retardancy test method.
- the sound absorption of the sound absorbing and insulating material was measured by the ISO354 method.
- Example 1 the physical properties of the sound absorbing and insulating material manufactured by yarn selection of heat resistant fibers were compared. That is, a first nonwoven fabric having a density of 300 g / m 2 and a thickness of 6 mm was manufactured by the same needle punching process as in Example 1, and then impregnated, dried, and molded in a binder solution to form an internal sound absorbing and insulating layer. However, when manufacturing the nonwoven fabric, the yarn shown in Table 1 having a fineness of 2 denier and a length of 51 mm was used.
- the external sound absorbing and insulating layer As the external sound absorbing and insulating layer, a second nonwoven fabric having a density of 120 g / m 2 and a thickness of 2 mm was used in the same needle punching process as in Example 1 above.
- the sound absorbing and insulating material was manufactured by stacking the external sound absorbing and insulating layer on both sides of the internal sound absorbing and insulating layer by the method proposed in Example 1.
- Tables 1 and 2 show the results of measuring the physical properties of the sound absorbing and insulating materials manufactured by different types of heat resistant fibers.
- the sound absorbing and insulating material manufactured using heat-resistant fibers having a marginal oxygen index of 25% or more and a heat resistance temperature of 150 ° C. or more has heat resistance, durability, flame retardancy, nonflammability, and It can be seen that all the sound absorbing properties are satisfied. As a result, it can be confirmed that all the heat-resistant fibers known as super fibers can be applied to the nonwoven fabric of the sound absorbing and insulating material of the present invention.
- Example 2 the sound absorbing and insulating material was manufactured in the same manner as in Example 1, except that the density of the first nonwoven fabric was different, and the sound absorbing and insulating performance of the manufactured sound absorbing and insulating material is shown in FIG. 4.
- the sound absorption performance of the sound absorbing and insulating material was superior when the first nonwoven fabric increased to 600 g / m 2 was used as compared to the first nonwoven fabric having a density of 300 g / m 2.
- a sound absorbing and insulating material in which an internal sound absorbing and insulating layer was formed by impregnating a thermosetting binder applied to a first nonwoven fabric, a sound absorbing and insulating material made of a first nonwoven fabric (Comparative Example 1), The sound absorption rate of each of the sound absorbing and insulating materials (Comparative Example 2) prepared by coating the thermosetting binder on the first nonwoven fabric was compared.
- Table 3 shows a sound absorbing and insulating material made of a nonwoven fabric (Comparative Example 1), a sound absorbing and insulating material made of a nonwoven fabric coated with a thermosetting binder (Comparative Example 2), and a non-woven fabric impregnated with a thermosetting binder. 1) The sound absorption rate of each was measured.
- Example 1 400 0.01 0.02 0.08 500 0.03 0.03 0.10 630 0.12 0.05 0.17 800 0.16 0.08 0.24 1000 0.26 0.12 0.35 1250 0.32 0.15 0.46 1600 0.39 0.22 0.59 2000 0.48 0.29 0.72 2500 0.64 0.40 0.79 3150 0.63 0.57 0.83 4000 0.72 0.68 0.86 5000 0.80 0.77 0.98 6300 0.78 0.82 0.99 8000 0.89 0.98 0.99 10000 0.90 0.98 0.98
- Example 1 exhibits excellent scratch effect in the entire frequency range compared to Comparative Example 1 using a non-woven fabric not impregnated with a thermosetting binder as the sound absorbing and insulating material have.
- Comparative Example 2 in which the non-woven fabric coated on the surface of the thermosetting binder was used as the sound absorbing and insulating material, the sound absorbing and insulating material was lower in the 400 to 5000 Hz frequency range than the nonwoven fabric (Comparative Example 1).
- Example 4 the thermal insulation performance of each of the sound absorbing and insulating materials manufactured in Example 1, Comparative Example 1, and Comparative Example 3 was evaluated. That is, the sound absorbing and insulating material having a thickness of 25 mm were respectively installed, and 1000 ° C. heat was applied to one side of the sound absorbing and insulating material for 5 minutes, and then the temperature was measured on the opposite side of the sound absorbing and insulating material.
- the temperature measured on the opposite side of the sound absorbing and insulating material was 250 degreeC
- the sound absorbing and insulating material of Comparative Example 1 was 350 degreeC.
- the sound absorbing and insulating material of the present invention can be seen that the heat shielding performance is also improved by impregnating the thermosetting resin.
- the sound absorbing and insulating material of Comparative Example 3 is a sound absorbing and insulating material impregnated with a thermoplastic resin. As soon as heat is applied at 1000 ° C., the thermoplastic resin melts and the shape of the sound absorbing and insulating material is deformed.
- the sound absorbing and insulating material of the present invention has excellent heat shielding and heat insulating properties.
- Example 5 the heat shielding performance of the sound absorbing and insulating material of Example 1 and the existing aluminum heat shielding plate were compared. That is, the same heat was applied to one surface of the prepared sound absorbing and insulating material and the heat shield plate so that the temperature in the heat source direction was 250 ° C. Then, the temperature was measured on the opposite side of the sound absorbing and insulating material for each heating time. The result is shown in FIG.
- the sound absorbing and insulating material according to the present invention can be seen that the heat shield temperature is superior to 11 °C or more compared to the aluminum heat shield plate.
- a sound absorbing and insulating material was manufactured by the method of Example 1, and the content of the finally included binder was adjusted by drying the first aramid nonwoven fabric impregnated with the epoxy resin solution. At this time, the binder content is expressed in parts by weight of the binder included in the sound absorbing and insulating material based on 100 parts by weight of the dried nonwoven fabric.
- Table 4 and Table 5 show the results of comparing the mechanical properties and the sound absorption rate of the sound absorbing and insulating material prepared according to the content of the binder included in the sound absorbing and insulating layer.
- Binder Content (parts by weight) 0 10 50 100 200 Aeration amount (mL / cm2 ⁇ s) 500 380 350 320 210 Tensile Strength (kg / cm2) 40 60 200 240 310 nonflammable Nonflammable Nonflammable Nonflammable Nonflammable Nonflammable Nonflammable
- Example 1 a sound absorbing and insulating material was impregnated with 50 parts by weight of a binder based on 100 parts by weight of the aramid first nonwoven fabric, and the resin shown in Table 6 was used as the binder.
- Table 6 shows the results of comparing the mechanical properties and the sound absorption rate of the sound absorbing and insulating material manufactured by different kinds of binders.
- Binder resin Epoxy phenol Urea Melamine Polyurethane Heat resistance temperature (°C x1hr) 300 260 190 300 200 Tensile Strength (kg / cm2) 200 165 180 180 170 Flame retardant Self-esteem Self-esteem Self-esteem Self-esteem Self-esteem nonflammable Nonflammable Nonflammable Nonflammable Nonflammable Nonflammable Nonflammable Nonflammable
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Abstract
Description
흡차음재의 물성 | ||||||||
구 분 | 원사1 | 원사2 | 원사3 | 원사4 | 원사5 | 원사6 | 원사7 | |
원사 | 원사소재 | 아라미드 | PPS | PI | PBI | PBO | OXI-PAN | PK |
한계산소지수 | 40 | 30 | 50 | 40 | 60 | 65 | 30 | |
내열온도 (℃x1hr) |
300 | 230 | 300 | 300 | 300 | 300 | 300 | |
내열성 | 외관 | 이상 없음 |
이상 없음 |
이상 없음 |
이상 없음 |
이상 없음 |
이상 없음 |
이상 없음 |
인장강도 (Kgf/㎠) |
200 | 180 | 220 | 200 | 210 | 210 | 200 | |
열싸이클 | 외관 | 이상 없음 |
이상 없음 |
이상 없음 |
이상 없음 |
이상 없음 |
이상 없음 |
이상 없음 |
난연성 | 자소성 | 자소성 | 자소성 | 자소성 | 자소성 | 자소성 | 자소성 | |
불연성 | 불연 | 불연 | 불연 | 불연 | 불연 | 불연 | 불연 |
주파수(Hz) | 흡차음재의 흡음률 | |||
원사1 (아라미드) |
원사2 (PPS) |
원사6 (OXI-PAN) |
원사7 (PK) |
|
400 | 0.08 | 0.05 | 0.08 | 0.05 |
500 | 0.10 | 0.06 | 0.09 | 0.06 |
630 | 0.16 | 0.09 | 0.13 | 0.08 |
800 | 0.23 | 0.15 | 0.22 | 0.19 |
1000 | 0.35 | 0.30 | 0.35 | 0.26 |
1250 | 0.44 | 0.39 | 0.45 | 0.37 |
1600 | 0.59 | 0.49 | 0.57 | 0.31 |
2000 | 0.70 | 0.66 | 0.68 | 0.48 |
2500 | 0.79 | 0.71 | 0.80 | 0.67 |
3150 | 0.83 | 0.80 | 0.85 | 0.78 |
4000 | 0.86 | 0.83 | 0.88 | 0.84 |
5000 | 0.99 | 0.95 | 0.92 | 0.83 |
6300 | 0.98 | 0.96 | 0.98 | 0.89 |
8000 | 0.99 | 0.95 | 0.89 | 0.95 |
10000 | 0.98 | 0.97 | 0.99 | 0.95 |
주파수(Hz) | 흡음률 | ||
비교예 1 | 비교예 2 | 실시예 1 | |
400 | 0.01 | 0.02 | 0.08 |
500 | 0.03 | 0.03 | 0.10 |
630 | 0.12 | 0.05 | 0.17 |
800 | 0.16 | 0.08 | 0.24 |
1000 | 0.26 | 0.12 | 0.35 |
1250 | 0.32 | 0.15 | 0.46 |
1600 | 0.39 | 0.22 | 0.59 |
2000 | 0.48 | 0.29 | 0.72 |
2500 | 0.64 | 0.40 | 0.79 |
3150 | 0.63 | 0.57 | 0.83 |
4000 | 0.72 | 0.68 | 0.86 |
5000 | 0.80 | 0.77 | 0.98 |
6300 | 0.78 | 0.82 | 0.99 |
8000 | 0.89 | 0.98 | 0.99 |
10000 | 0.90 | 0.98 | 0.98 |
구 분 | 바인더의 함량에 따른 흡차음재의 기계적 물성 비교 | ||||
바인더 함량(중량부) | 0 | 10 | 50 | 100 | 200 |
통기량(mL/㎠·s) | 500 | 380 | 350 | 320 | 210 |
인장강도 (kg/㎠) | 40 | 60 | 200 | 240 | 310 |
불연성 | 불연 | 불연 | 불연 | 불연 | 불연 |
주파수(Hz) | 바인더의 함량에 따른 흡차음재의 흡음률 비교 | ||||
0 중량부 | 10 중량부 | 50 중량부 | 100 중량부 | 200 중량부 | |
400 | 0.01 | 0.01 | 0.08 | 0.06 | 0.02 |
500 | 0.03 | 0.04 | 0.10 | 0.09 | 0.04 |
630 | 0.12 | 0.14 | 0.16 | 0.15 | 0.09 |
800 | 0.16 | 0.17 | 0.23 | 0.25 | 0.11 |
1000 | 0.26 | 0.26 | 0.35 | 0.30 | 0.14 |
1250 | 0.32 | 0.34 | 0.44 | 0.42 | 0.17 |
1600 | 0.39 | 0.41 | 0.59 | 0.54 | 0.22 |
2000 | 0.48 | 0.55 | 0.70 | 0.58 | 0.35 |
2500 | 0.64 | 0.68 | 0.79 | 0.67 | 0.44 |
3150 | 0.63 | 0.69 | 0.83 | 0.72 | 0.52 |
4000 | 0.72 | 0.77 | 0.86 | 0.75 | 0.53 |
5000 | 0.80 | 0.83 | 0.99 | 0.79 | 0.57 |
6300 | 0.78 | 0.88 | 0.98 | 0.80 | 0.63 |
8000 | 0.89 | 0.91 | 0.99 | 0.90 | 0.70 |
10000 | 0.90 | 0.92 | 0.98 | 0.92 | 0.71 |
구 분 | 바인더의 종류에 따른 흡차음재의 물성 비교 | ||||
바인더 수지 | 에폭시 | 페놀 | 우레아 | 멜라민 | 폴리우레탄 |
내열온도(℃x1hr) | 300 | 260 | 190 | 300 | 200 |
인장강도 (kg/㎠) | 200 | 165 | 180 | 180 | 170 |
난연성 | 자소성 | 자소성 | 자소성 | 자소성 | 자소성 |
불연성 | 불연 | 불연 | 불연 | 불연 | 불연 |
Claims (40)
- 내열섬유의 함량이 30~100 중량%인 제 1 부직포와, 상기 제 1 부직포와 동일한 층에 위치하여 부직포 내부의 3차원 형상을 유지하는 형태로 함유된 바인더를 포함하는 내부흡차음층; 및
내열섬유의 함량이 30~100 중량%인 제 2 부직포로 된 외부흡차음층;
을 포함하고, 상기 내부흡차음층의 일면 또는 양면에 상기 외부흡차음층이 적층되어 있는 것을 특징으로 하는 흡차음재. - 청구항 1에 있어서,
상기 내부흡차음층과 외부흡차음층 간의 적층은 접착제, 열 또는 압력에 의해 이루어지는 것을 특징으로 하는 흡차음재. - 청구항 1에 있어서,
상기 외부흡차음층의 일면에 접착제를 도포하고, 상기 접착제가 도포된 면을 내부흡차음층에 접촉시켜 적층된 것을 특징으로 하는 흡차음재. - 청구항 3에 있어서,
상기 접착제는 제 1 부직포에 함유된 바인더인 것을 특징으로 하는 흡차음재. - 청구항 4에 있어서,
상기 접착제는 열경화성 수지인 것을 특징으로 하는 흡차음재. - 청구항 1에 있어서,
상기 제 1 부직포 또는 제 2 부직포를 구성하는 내열섬유는 한계산소지수(LOI)가 25% 이상이며 내열온도가 150℃ 이상인 것을 특징으로 하는 흡차음재. - 청구항 6에 있어서,
상기 내열섬유는 아라미드 섬유, 폴리페닐렌설파이드(PPS) 섬유, 산화된 폴리아크릴로니트릴(OXI-PAN) 섬유, 폴리이미드(PI)섬유, 폴리벤즈이미다졸(PBI) 섬유, 폴리벤즈옥사졸(PBO) 섬유, 폴리테트라플루오로에틸렌(PTFE) 섬유, 폴리케톤(PK) 섬유, 금속 섬유, 탄소 섬유, 유리 섬유, 현무암 섬유, 실리카 섬유, 및 세라믹 섬유 중에서 선택된 1종 이상인 것을 특징으로 하는 흡차음재. - 청구항 7에 있어서,
상기 내열섬유는 아라미드 섬유인 것을 특징으로 하는 흡차음재. - 청구항 1에 있어서,
상기 제 1 부직포 또는 제 2 부직포는 섬도가 1~15 데니어인 아라미드 섬유로 이루어지고, 두께가 3~20 mm인 단일층의 부직포인 것을 특징으로 하는 흡차음재. - 청구항 1에 있어서,
상기 제 1 부직포 또는 제 2 부직포는 밀도가 100~2000 g/㎡인 것을 특징으로 하는 흡차음재. - 청구항 10에 있어서,
상기 부직포는 밀도가 200~1200 g/㎡인 것을 특징으로 하는 흡차음재. - 청구항 1에 있어서,
상기 내부흡차음층은 단일층 또는 다층으로 구성된 것을 특징으로 하는 흡차음재. - 청구항 1에 있어서,
상기 내부흡차음층에 포함된 바인더는 열경화성 수지인 것을 특징으로 하는 흡차음재. - 청구항 5 또는 13항에 있어서,
상기 열경화성 수지는 에폭시 수지인 것을 특징으로 하는 흡차음재. - 청구항 14에 있어서,
상기 에폭시 수지는 비스페놀 A 디글리시딜 에테르, 비스페놀 B 디글리시딜 에테르, 비스페놀 AD 디글리시딜 에테르, 비스페놀 F 디글리시딜 에테르, 비스페놀 S 디글리시딜 에테르, 폴리옥시프로필렌 디글리시딜 에테르, 비스페놀 A 디글리시딜 에테르 폴리머, 포스파젠 디글리시딜 에테르, 비스페놀 A 노볼락 에폭시, 페놀 노블락 에폭시 수지, 및 o-크레졸 노블락 에폭시 수지 중에서 선택된 1종 이상인 것을 특징으로 하는 흡차음재. - 청구항 1 내지 13항 중에서 선택된 어느 한 항에 있어서,
상기 흡차음재는 적용대상의 입체구조 형상으로 성형된 것을 특징으로 하는 흡차음재. - 청구항 16항에 있어서,
상기 흡차음재는 자동차용인 것을 특징으로 하는 흡차음재. - a)내열섬유의 함량이 30~100 중량%인 제 1 부직포를 바인더 용액에 함침시키는 단계;
b)상기 함침된 제 1 부직포를 건조하여 내부흡차음층(1)을 형성하는 단계; 및
c)내열섬유의 함량이 30~100 중량%인 제 2 부직포를 상기 내부흡차음층(1)의 일면 또는 양면에 적층시켜 외부흡차음층(2′, 2″)을 형성하는 단계;
를 포함하여 이루어지는 것을 특징으로 하는 상기 청구항 1에 따른 흡차음재의 제조방법. - 청구항 18에 있어서,
상기 c)단계 이후에, 상기 형성된 흡차음재를 고온에서 성형하는 단계(d 단계);
를 더 포함하여 이루어지는 것을 특징으로 하는 흡차음재의 제조방법. - 청구항 18에 있어서,
상기 b)단계에서의 건조는 70~200℃ 온도에서 수행하며, 상기 건조하여 형성된 내부흡차음층에는 부직포 100 중량부에 대하여 바인더가 1~300 중량부 포함된 것을 특징으로 하는 흡차음재의 제조방법. - 청구항 18에 있어서,
상기 c)단계에서의 적층은 접착제, 열 또는 압력에 의해 이루어지는 것을 특징으로 하는 흡차음재의 제조방법. - 청구항 21에 있어서,
제 2 부직포의 일면에 접착제를 도포하고, 상기 접착제가 도포된 면을 내부흡차음층에 접촉시켜 적층되는 것을 특징으로 하는 흡차음재의 제조방법. - 청구항 22에 있어서,
상기 접착제는 제 1 부직포에 함유된 바인더인 것을 특징으로 하는 흡차음재의 제조방법. - 청구항 23에 있어서,
상기 접착제는 열경화성 수지인 것을 특징으로 하는 흡차음재의 제조방법. - 청구항 18에 있어서,
상기 제 1 부직포 또는 제 2 부직포를 구성하는 내열섬유는 한계산소지수(LOI)가 25% 이상이며 내열온도가 150℃ 이상인 것을 특징으로 하는 흡차음재의 제조방법. - 청구항 25에 있어서,
상기 내열섬유는 아라미드 섬유, 폴리페닐렌설파이드(PPS) 섬유, 산화된 폴리아크릴로니트릴(OXI-PAN) 섬유, 폴리이미드(PI)섬유, 폴리벤즈이미다졸(PBI) 섬유, 폴리벤즈옥사졸(PBO) 섬유, 폴리테트라플루오로에틸렌(PTFE) 섬유, 폴리케톤(PK) 섬유, 금속 섬유, 탄소 섬유, 유리 섬유, 현무암 섬유, 실리카 섬유, 및 세라믹 섬유 중에서 선택된 1종 이상인 것을 특징으로 하는 흡차음재의 제조방법. - 청구항 25에 있어서,
상기 내열섬유는 섬도가 1~15 데니어 및 원사의 길이가 20~100 mm의 아라미드 섬유인 것을 특징으로 하는 흡차음재의 제조방법. - 청구항 18에 있어서,
상기 제 1 부직포 또는 제 2 부직포는 두께가 3~20 mm이고, 밀도가 100~2000 g/㎡인 것을 특징으로 하는 흡차음재의 제조방법. - 청구항 28에 있어서,
상기 제 1 부직포 또는 제 2 부직포는 섬도가 1~15 데니어인 아라미드의 내열섬유를 니들 펀칭시켜 형성된 것으로, 두께가 3~20 mm인 아라미드 부직포인 것을 특징으로 하는 흡차음재의 제조방법. - 청구항 29에 있어서,
상기 부직포는 연속해서 업-다운 니들링, 다운-업 니들링, 업-다운 니들링을 통해 형성되는 것을 특징으로 하는 흡차음재의 제조방법. - 청구항 29에 있어서,
상기 부직포는 니들 스트로크 30~350 회/㎡로 형성되는 것을 특징으로 하는 흡차음재의 제조방법. - 청구항 18 또는 19항에 있어서,
바인더 용액은 바인더 1~60 중량%, 경화제 0.1~10 중량%, 촉매 0.01~5 중량%, 첨가제 1~40 중량%, 및 잔량의 용매로 이루어지는 것을 특징으로 하는 흡차음재의 제조방법. - 청구항 32에 있어서,
상기 바인더 용액은 바인더 1~30 중량%, 경화제 0.1~10 중량%, 촉매 0.01~5 중량%, 난연제 1~30 중량%, 및 용매 40~95 중량%로 이루어지는 것을 특징으로 하는 흡차음재의 제조방법. - 청구항 33에 있어서,
상기 바인더는 열경화성 수지인 것을 특징으로 하는 흡차음재의 제조방법. - 청구항 24 또는 34항에 있어서,
상기 열경화성 수지는 에폭시 수지인 것을 특징으로 하는 흡차음재의 제조방법. - 청구항 35에 있어서,
상기 에폭시 수지는 비스페놀 A 디글리시딜 에테르, 비스페놀 B 디글리시딜 에테르, 비스페놀 AD 디글리시딜 에테르, 비스페놀 F 디글리시딜 에테르, 비스페놀 S 디글리시딜 에테르, 폴리옥시프로필렌 디글리시딜 에테르, 비스페놀 A 디글리시딜 에테르 폴리머, 포스파젠 디글리시딜 에테르, 비스페놀 A 노볼락 에폭시, 페놀 노블락 에폭시 수지, 및 o-크레졸 노블락 에폭시 수지 중에서 선택된 1종 이상인 것을 특징으로 하는 흡차음재의 제조방법. - 청구항 18 내지 31, 33, 34, 및 36항 중에서 선택된 어느 한 항에 있어서,
상기 흡차음재는 자동차용인 것을 특징으로 하는 흡차음재의 제조방법. - i) 소음을 유발하는 장치의 입체구조를 확인하는 단계;
ii) 상기 장치의 입체구조와 일부 또는 전부가 일치하도록 상기 청구항 1 내지 13항 중에서 선택된 어느 한 항의 흡차음재를 제작 및 성형하는 단계; 및
iii) 상기 흡차음재를 상기 소음 유발 장치에 인접시키는 단계;
를 포함하는 것을 특징으로 하는 소음 유발 장치의 소음 저감방법. - 청구항 38에 있어서,
상기 장치는 모터, 엔진 또는 배기계인 것을 특징으로 하는 소음 유발 장치의 소음 저감방법. - 청구항 39에 있어서,
상기 인접은 소음 유발 장치에 밀착시켜 체결하거나, 또는 소음 유발 장치와 일정 거리를 두어 설치하거나, 또는 소음 유발 장치에 적용되는 부품으로 성형하여 적용하는 것을 특징으로 하는 소음 유발 장치의 소음 저감방법.
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CA2933597A CA2933597C (en) | 2013-12-19 | 2014-04-03 | Sound absorbing and insulating material with superior moldability and appearance and method for manufacturing the same |
BR112016014046-0A BR112016014046B1 (pt) | 2013-12-19 | 2014-04-03 | Material absorvente e isolante de som; método para fabricação do material absorvente e isolante de som; e método para reduzir ruído de um dispositivo gerador de ruído |
US15/105,920 US9805708B2 (en) | 2013-12-19 | 2014-04-03 | Sound absorbing and insulating material with superior moldability and appearance and method for manufacturing the same |
AU2014367640A AU2014367640B2 (en) | 2013-12-19 | 2014-04-03 | Sound-absorbing/insulating material having excellent exterior and moldability, and method for producing same |
EP14871409.0A EP3085526B1 (en) | 2013-12-19 | 2014-04-03 | Sound absorbing and insulating material with superior moldability and appearance and method for manufacturing the same |
MX2016007827A MX360859B (es) | 2013-12-19 | 2014-04-03 | Material amortiguador y aislante de sonido con moldeabilidad y apariencia superiores y método para fabricar el mismo. |
JP2016540670A JP6276861B2 (ja) | 2013-12-19 | 2014-04-03 | 成形性及び外観に優れた吸遮音材及びその製造方法 |
RU2016129197A RU2666429C1 (ru) | 2013-12-19 | 2014-04-03 | Звукопоглощающий и изоляционный материал, имеющий превосходную пригодность для формования и внешность, и способ его изготовления |
CN201480070028.0A CN105848875B (zh) | 2013-12-19 | 2014-04-03 | 具有优异外观和模制性的吸音/隔音材料及制备其的方法 |
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US9805708B2 (en) | 2017-10-31 |
EP3085526A4 (en) | 2017-09-06 |
AU2014367640A1 (en) | 2016-07-07 |
JP6276861B2 (ja) | 2018-02-07 |
US10304437B2 (en) | 2019-05-28 |
AU2014367640B2 (en) | 2018-08-30 |
MX360859B (es) | 2018-11-20 |
CA2933597A1 (en) | 2015-06-25 |
BR112016014046A2 (pt) | 2017-08-08 |
BR112016014046B1 (pt) | 2021-06-29 |
KR101439066B1 (ko) | 2014-09-05 |
RU2666429C1 (ru) | 2018-09-07 |
RU2016129197A (ru) | 2018-01-24 |
CA2933597C (en) | 2021-03-30 |
US20160322041A1 (en) | 2016-11-03 |
MX2016007827A (es) | 2016-09-07 |
CN105848875B (zh) | 2018-09-14 |
EP3085526A1 (en) | 2016-10-26 |
CN105848875A (zh) | 2016-08-10 |
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