US20140306142A1 - Polyamide resin composition for sound insulation - Google Patents

Polyamide resin composition for sound insulation Download PDF

Info

Publication number
US20140306142A1
US20140306142A1 US13/946,230 US201313946230A US2014306142A1 US 20140306142 A1 US20140306142 A1 US 20140306142A1 US 201313946230 A US201313946230 A US 201313946230A US 2014306142 A1 US2014306142 A1 US 2014306142A1
Authority
US
United States
Prior art keywords
weight
polyamide
parts
composition
glass fiber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US13/946,230
Other languages
English (en)
Inventor
Jee-Young Youn
Sang-lll Lee
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hyundai Motor Co
Kia Corp
Original Assignee
Hyundai Motor Co
Kia Motors Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hyundai Motor Co, Kia Motors Corp filed Critical Hyundai Motor Co
Assigned to HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION reassignment HYUNDAI MOTOR COMPANY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LEE, SANG-ILL, YOUN, JEE-YOUNG
Publication of US20140306142A1 publication Critical patent/US20140306142A1/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
    • C08L77/02—Polyamides derived from omega-amino carboxylic acids or from lactams thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K9/00—Use of pretreated ingredients
    • C08K9/04—Ingredients treated with organic substances
    • C08K9/06—Ingredients treated with organic substances with silicon-containing compounds
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/162—Selection of materials
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
    • C03C25/10—Coating
    • C03C25/24—Coatings containing organic materials
    • C03C25/40—Organo-silicon compounds
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
    • C03C25/10—Coating
    • C03C25/42—Coatings containing inorganic materials
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/02—Fibres or whiskers
    • C08K7/04—Fibres or whiskers inorganic
    • C08K7/14—Glass
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
    • C08K2003/3045—Sulfates
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/002—Physical properties
    • C08K2201/003—Additives being defined by their diameter
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/002—Physical properties
    • C08K2201/004—Additives being defined by their length
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/08—Stabilised against heat, light or radiation or oxydation

Definitions

  • the present invention relates to a polyamide resin composition for sound insulation that effectively insulates engine sounds and noise generated in an engine room of a vehicle, and more specifically, to a polyamide resin composition for sound insulation which includes polyamide 66 or polyamide 6 resins, glass fibers and barium sulfates.
  • a partition of an engine room of a vehicle is a wall disposed between the engine room and a dash board to insulate transfer of noise generated in the engine room into an interior of the vehicle.
  • the partition thus, improves the comfort level for passengers in the vehicle.
  • a partition of an engine room of a vehicle is conventionally made of a steel material.
  • the weight of such a steel partition is excessively large, thus reducing fuel efficiency and ride comfort of the vehicle. Further, it is difficult to manufacture a complicated form from such a steel material.
  • a composition including polypropylene, a glass fiber, and iron oxide (Fe 2 O 3 ) having high specific gravity has been used as a vehicle partition.
  • Such a composition is more easily processed than metal, is lightweight, can be provided in various and simple designs and design effects, and is less expensive due to its high productivity.
  • it provides inadequate mechanical stiffness, heat resistance and injection moldability.
  • a filler such as iron oxide (Fe 2 O 3 , specific gravity: 4 to 4.5) and barium sulfate (BaSO 4 , specific gravity: 4 to 4.5) is commonly used to increase the weight of a material.
  • Iron oxide and barium sulfate have a higher specific gravity as compared to talc or wollastonite (specific gravity: 2.6 to 2.9). Thus, these fillers are extensively used because a sound insulation property can be improved by increasing the specific gravity of a plastic material.
  • Moh's hardness of iron oxide is about 7, which is significantly high.
  • screws and molds of injection molding machines are easily abraded during extrusion and molding of products which include iron oxide due to the high hardness provided thereby. As such, operation and maintenance of the injection molding machine for high hardness materials is costly.
  • Korean Unexamined Patent Application Publication No. 2010-41588 describes a polyamide resin composition for a vehicle engine cover, including a polyamide 6 resin, a glass fiber, carbon nanotube and a heat resistant stabilizer.
  • the composition is problematic in that a sound insulation property is not sufficient even though heat resistance is excellent.
  • Japanese Unexamined Patent Application Publication No. 1999-43602 describes a polyamide resin composition including a polyamide resin, a glass fiber and barium sulfate.
  • the content of barium sulfate is low, and thus there is a disadvantage in that a sufficient sound insulation property is not provided.
  • the present invention provides a polyamide resin composition for sound insulation, which includes a polyamide 66 or polyamide 6 resin, a glass fiber for improving mechanical and heat resistance properties of the composition, and barium sulfate for improving a sound insulation property of the composition.
  • the composition can further include one or more of an antioxidant for preventing deterioration of the composition, a heat resistant stabilizer for improving heat resistance, and a lubricant for reducing friction to improve moldability.
  • the composition of the present invention thus, provides excellent mechanical properties, heat resistance, noise and vibration insulation performance, degree of freedom in design, and injection moldability.
  • the present invention further provides a partition for a vehicle fabricated from the present composition, wherein the partition effectively insulates engine sound generated in an engine room, and thus provides a more comfortable driving environment.
  • the present invention provides a polyamide resin composition for sound insulation comprising about 15 to 20 parts by weight of a glass fiber, and about 45 to 50 parts by weight of barium sulfate, based on 100 parts by weight of a polyamide 66 or polyamide 6 resin.
  • the glass fiber can be any conventional glass fibers that provide the desired mechanical and heat resistance properties, and according to preferred embodiments, the glass fiber has an average length of about 1 mm to 5 mm and an average diameter of a cross section of about 10 to 13 ⁇ m.
  • the glass fiber is coated with a silane-based coupling agent.
  • a weight of the silane-based coupling agent is about 0.1 to 0.3 wt % based on a total weight of the glass fiber.
  • an average diameter of barium sulfate particles is about 20 to 30 ⁇ m.
  • the polyamide resin composition for sound insulation further includes one or more of about 0.3 to 0.5 parts by weight of an antioxidant, about 0.3 to 0.5 parts by weight of a heat resistant stabilizer, and/or about 0.2 to 0.4 parts by weight of a lubricant.
  • the antioxidant is a mixture of a phenol-based antioxidant and a phosphite-based antioxidant.
  • the present invention having the above-described constitution of a polyamide 66 or polyamide 6 resin, a glass fiber and barium sulfate (BaSO 4 ) having high specific gravity, provides excellent mechanical properties, heat resistance and noise and vibration insulation performance.
  • the present invention provides a partition for a vehicle fabricated of the composition.
  • a partition provides a weight reduction effect of about 2.6 kg per one vehicle as compared to a conventional partition made of iron.
  • injection molding can be performed to implement a complicated shape using the present composition, there is an effect in that the excellent degree of freedom in design can be ensured in a narrow space in an engine room.
  • the composition utilizes a barium sulfate having Moh's hardness of about 3.
  • a barium sulfate having Moh's hardness of about 3.
  • the use of such a barium sulfate provides excellent injection moldability, as compared to a conventional polypropylene composition including iron oxide having Moh's hardness of 7.
  • FIG. 1 is a mimetic diagram showing a partition of an engine room of a vehicle
  • FIG. 2 is a graph showing the magnitude of noise insulated at a left of a driver's seat for each frequency
  • FIG. 3 is a graph showing the magnitude of noise insulated at a right of the driver's seat for each frequency
  • FIG. 4 is a graph showing the magnitude of noise insulated at a left of a front passenger seat for each frequency
  • FIG. 5 is a graph showing the magnitude of noise insulated at a back seat for each frequency
  • FIG. 6 is a graph showing the magnitude of noise insulated at a left of a VIP seat of the back seat for each frequency
  • FIG. 7 is a graph showing the magnitude of noise insulated at a right of the VIP seat of the back seat for each frequency
  • FIG. 8 is a graph showing the magnitude of noise insulated directly behind a left engine room for each frequency.
  • FIG. 9 is a graph showing the magnitude of noise insulated directly behind a right engine room for each frequency.
  • vehicle or “vehicular” or other similar term as used herein is inclusive of motor vehicles in general such as passenger automobiles including sports utility vehicles (SUV), buses, trucks, various commercial vehicles, watercraft including a variety of boats and ships, aircraft, and the like, and includes hybrid vehicles, electric vehicles, plug-in hybrid electric vehicles, hydrogen-powered vehicles and other alternative fuel vehicles (e.g. fuels derived from resources other than petroleum).
  • a hybrid vehicle is a vehicle that has two or more sources of power, for example both gasoline-powered and electric-powered vehicles.
  • the term “about” is understood as within a range of normal tolerance in the art, for example within 2 standard deviations of the mean. “About” can be understood as within 10%, 9%, 8%, 7%, 6%, 5%, 4%, 3%, 2%, 1%, 0.5%, 0.1%, 0.05%, or 0.01% of the stated value. Unless otherwise clear from the context, all numerical values provided herein are modified by the term “about”.
  • the present invention relates to polyamide resin composition for sound insulation having excellent mechanical stiffness, heat resistance and noise insulation function. More specifically, the present invention relates to polyamide resin composition which includes a polyamide 66 or polyamide 6 resin, a glass fiber and barium sulfate (BaSO 4 ) having high specific gravity in order to increase mechanical stiffness, heat resistance and injection moldability. According to preferred embodiments, the composition further includes one or more of an antioxidant, a heat resistant stabilizer and/or a lubricant.
  • the content of the glass fiber is about 15 to 20 parts by weight
  • the content of barium sulfate is about 45 to 50 parts by weight
  • the content of the antioxidant is about 0.3 to 0.5 parts by weight
  • the content of the heat resistant stabilizer is about 0.3 to 0.5 parts by weight
  • the content of the lubricant is about 0.2 to 0.4 parts by weight, based on 100 parts by weight of the polyamide 66 or polyamide 6 resin.
  • any polyamide resin known in the art may be used as the polyamide resin component. However, it is preferable that polyamide 66 or polyamide 6 resin is used. As described herein, the polyamide 66 or polyamide 6 resin is a material that is a basis of the present invention.
  • the polyamide resin is a material having excellent general mechanical and heat resistance properties such as tensile strength, flexural strength, flexural modulus, heat resistance, chemical resistance, and moldability. As such, the polyamide resin is extensively used in various fields such as vehicles, airplanes, space and sports.
  • the mechanical and heat resistance properties may be easily improved by including a reinforcing agent, such as a glass fiber, in the polyamide 66 or polyamide 6 resin.
  • a reinforcing agent such as a glass fiber
  • the glass fiber functions to improve the mechanical properties of the polyamide resin composition, such as tensile strength, flexural strength, flexural modulus and impact strength, as well as the heat resistance properties, such as a heat distortion temperature (HDT). Any glass fiber known in the art may be used as the glass fiber.
  • the surface of the glass fiber is coated with a silane-based coupling agent in order to increase an interface adhesion property between the polyamide resin and the glass fiber.
  • the content of the glass fiber is about 15 to 20 parts by weight based on 100 parts by weight of polyamide 66 or polyamide 6.
  • the content of the glass fiber is less than about 15 parts by weight, the mechanical and heat resistance properties of the composition may be reduced.
  • the content is more than about 20 parts by weight, fluidity of the composition may be reduced to deteriorate the appearance quality of molded products.
  • an average diameter of a cross section of the glass fiber is about 10 to 13 ⁇ m.
  • the average diameter of the cross section is less than about 10 ⁇ m, since a breakage ratio of the glass fiber is high, the mechanical property of the composition may be reduced.
  • the average diameter is more than about 13 ⁇ m, the appearance quality of the composition may be reduced.
  • any conventional glass fiber may be used in the present invention.
  • the glass fiber be a long glass fiber such as one having an average length of about 1 mm to 5 mm in order to improve impact strength and a dimensional stability effect of the composition.
  • the average length of the glass fiber is less than about 1 mm, the mechanical and heat resistance properties of the composition may be reduced and a distortion phenomenon may occur in large-sized products.
  • the average length is more than about 5 mm, a significant difference occurs between glass fiber alignment on the surface of the composition and the glass fiber alignment in the composition. This results in a difference in physical properties between the surface and the inside of the composition.
  • the content of the silane-based coupling agent is about 0.1 to 0.3 wt % based on the total weight of the glass fiber.
  • the content of the silane-based coupling agent is less than about 0.1 wt %, mechanical and heat resistance properties of the composition may be reduced.
  • the content is more than about 0.3 wt %, moldability may be reduced due to an increase in viscosity of the composition.
  • Barium sulfate (BaSO 4 ) is an inorganic filler that improves moldability and dimensional stability of the present composition and that further increases specific gravity of the composition, thus improving a sound insulation property. Since the sound insulation property is generally increased in proportion to an increase in specific gravity of the material, it is preferable to use a barium sulfate having a high specific gravity in order to improve the sound insulation property.
  • Barium sulfate has Moh's hardness of about 3, which is smaller than the Moh's hardness of about 7 for iron oxide used as a conventional inorganic filler. As such, friction of screws of injection molding machines and molds is reduced during an extrusion process and molding of the present composition to improve moldability.
  • the content of barium sulfate is about 45 to 50 parts by weight based on 100 parts by weight of polyamide 66 or polyamide 6.
  • the specific gravity of the composition may be reduced to reduce the sound insulation property.
  • appearance quality and physical properties may be reduced.
  • the average diameter of the particles of barium sulfate is about 20 to 30 ⁇ m. In the case where the average diameter is less than about 20 ⁇ m, moldability and dimensional stability may be reduced. On the other hand, in the case where the average diameter is more than about 30 ⁇ m, a surface area of barium sulfate is reduced, and effective sound insulation property cannot be obtained.
  • the antioxidant functions to suppress a reaction of oxidative degradation during extrusion and injection processes of the composition. Any conventional antioxidant may be used in the present invention, but it is preferable to use a mixture of a phenol-based antioxidant and a phosphate-based antioxidant.
  • the phenol-based antioxidant is reacted with radicals generated in plastics to discharge hydrogen in the phenol-based antioxidant, thereby stabilizing the radicals, and the antioxidant is converted into the radicals and remains in a stable form through a resonance effect or re-arrangement of electrons.
  • phenol-based antioxidant Any conventional phenol-based antioxidant may be used in the present invention, but it is preferable that the phenol-based antioxidant is N,N′-1,6-hexanediylbis(3,5-bis(1,1-dimethylethyl)-4-hydroxybenzene-propaneamide or bis-(3,3-bis-(4′-hydroxy-3′-tetrabutylphenyl)butanoic acid)-glycolester.
  • the phosphite-based antioxidant performs a function of a hydroperoxide decomposer to prevent the radicals from being generated. Further, if the phosphite-based antioxidant is used together with the phenol-based antioxidant, a synergistic effect can be expected and stability of cross-linked plastics and stability to UV are increased.
  • any conventional phosphite-based antioxidant may be used in the present invention, but it is preferable that the phosphite-based antioxidant is tris-(2,4-di-tertiary-butylphenyl)-phosphite or tetrakis(2,4-di-tertiary-butylphenyl)-4,4′-biphenylene diphosphite.
  • the composition contains about 0.3 to 0.5 parts by weight and more preferably 0.4 parts by weight of the mixed antioxidant, based on 100 parts by weight of polyamide 66 or polyamide 6.
  • the content of the antioxidant is less than about 0.3 parts by weight, the antioxidant cannot sufficiently prevent oxidation, and where the content is more than about 0.5 parts by weight, physical properties and the quality of appearance may be reduced.
  • the heat resistant stabilizer functions to improve heat resistance of the composition, and any matter known in the art may be used as the heat resistant stabilizer.
  • the heat resistant stabilizer is an iodine-based heat resistant stabilizer.
  • the heat resistant stabilizer is copper iodide (CuI).
  • the content of the heat resistant stabilizer is preferably about 0.3 to 0.5 parts by weight and more preferably about 0.2 parts by weight based on 100 parts by weight of the polyamide 66 or polyamide 6 resin.
  • the content of the heat resistant stabilizer is less than about 0.3 parts by weight, the heat resistance properties, such as the heat distortion temperature, of the composition may be reduced.
  • the content is more than about 0.5 parts by weight, the mechanical properties and the appearance quality may be reduced.
  • the lubricant functions to adjust friction between the compositions or between the composition and a metal when the composition is heated and molded to improve fluidity and a release property to thereby facilitate processing.
  • Any conventional lubricant may be used in the present invention, and according to preferred embodiments, an olefine-based lubricant, more preferably ethylene bisstearamide, is used.
  • the content of the lubricant is preferably about 0.2 to 0.4 parts by weight and more preferably about 0.2 parts by weight based on 100 parts by weight of the polyamide 66 or polyamide 6 resin.
  • the content of the lubricant is less than about 0.2 parts by weight, the fluidity and the release property may be reduced, and thus it may be difficult to mold large-sized products.
  • the lubricant content is more than about 0.4 parts by weight, mechanical properties and weld strength may be reduced.
  • the present invention provides excellent sounds insulation properties and may be applied in various ways so as to provide sound insulation.
  • the present invention is applied to a partition of an engine room of a vehicle.
  • the present invention relates to a method of manufacturing a polyamide resin composition for sound insulation.
  • the polyamide resin composition for sound insulation may be appropriately manufactured by a person of ordinary skill in the art with reference to known technologies. Specifically, it is preferable that the polyamide resin composition for sound insulation is manufactured so as to include about 15 to 20 parts by weight of a glass fiber, preferably a glass fiber coated with a silane-based coupling agent, about 45 to 50 parts by weight of barium sulfate, about 0.3 to 0.5 parts by weight of antioxidant, preferably a mixture of a phenol-based antioxidant and a phosphite-based antioxidant, about 0.3 to 0.5 parts by weight of the heat resistant stabilizer and about 0.2 to 0.4 parts by weight of the lubricant, based on 100 parts by weight of the polyamide 66 or polyamide 6 resin.
  • FIG. 1 is a mimetic diagram showing the partition 100 of the engine room of the vehicle which was formed from the polyamide resin compositions of the Examples and Comparative Examples.
  • the components and contents of the Examples and Comparative Examples are shown in the following Table 1. Thereafter, physical properties thereof were compared, and set forth in the following Table 2.
  • Table 1 is a table comparing the components and the contents of the Examples and the Comparative Examples.
  • the antioxidant, the heat resistant stabilizer and the lubricant of the above-described Table 1 were included in the same content in the Examples and the Comparative Examples, and polypropylene was only included in Comparative Example 1. Further, barium sulfate for improving the sound insulation property was only included in the Examples (in accordance with the present invention), while iron oxide and wollastonite were instead included in the Comparative Examples (not in accordance with the present invention).
  • Table 2 is a table in which physical and heat resistance properties of the Examples and the Comparative Examples are numerically represented through the specific tests, and compared.
  • the specific gravity was measured according to ASTM D792, and the tensile strength was measured according to ASTM D638 under the condition of the temperature of 23 ⁇ 2° C., relative humidity of 50%, atmospheric pressure, and a speed of 5 mm/min.
  • the flexural strength and the flexural modulus were measured according to ASTM D790, and the cross head speed was measured under the condition of a speed of 5 mm/min.
  • the impact strength was measured according to ASTM D256 as a value obtained by dividing energy when the specimen was broken by unit thickness by an Izod notch method at 23 ⁇ 2° C.
  • the heat distortion temperature was obtained by measuring the temperature in the case where the specimen was distorted when the ambient temperature was increased at the rate of 2° C./min under the condition of a load of 1.82 MPa on the specimen according to ASTM D648.
  • the specific gravity was highest in Comparative Example 1, but the tensile strength, the flexural strength, the flexural modulus and the impact strength were superior in the Examples.
  • one of the most important properties of a composition applied to the engine room of the vehicle is heat resistance. Based on the result that the heat resistance of the Examples was much better than the heat resistance of the Comparative Examples, it was demonstrated that the Examples were better than the Comparative Examples in terms of the mechanical and heat resistance properties. Further, it was demonstrated that in the case of Example 3 to which the long glass fiber was applied, all properties were better than Example 1 to which the short glass fiber was applied.
  • Table 3 is a table in which sound insulation performances of the Examples are compared.
  • Example 3 in the case of Example 3 to which the partition was applied, the measured numerical value was higher than that of the case where the partition was not applied, which means that a large amount of noise is insulated by the higher numerical value. Accordingly, it was confirmed that in the case of Example 3 to which the partition was applied, the measured noise was reduced at all positions in the vehicle and right behind the engine room as compared to the case where the partition was not applied.
  • FIG. 2 is a graph showing the magnitude of noise insulated at a left of a driver's seat for each frequency
  • FIG. 3 is a graph showing the magnitude of noise insulated at a right of the driver's seat for each frequency
  • FIG. 4 is a graph showing the magnitude of noise insulated at a left of a front passenger seat for each frequency
  • FIG. 5 is a graph showing the magnitude of noise insulated at a back seat for each frequency
  • FIG. 6 is a graph showing the magnitude of noise insulated at a left of a VIP seat of the back seat for each frequency
  • FIG. 7 is a graph showing the magnitude of noise insulated at a right of the VIP seat of the back seat for each frequency
  • FIG. 8 is a graph showing the magnitude of noise insulated directly behind a left engine room for each frequency
  • FIG. 9 is a graph showing the magnitude of noise insulated directly behind a right engine room for each frequency.
  • Example 3 (which was in accordance with the present invention) was positioned between the engine room and the dash board, and thus the noise flowing from the engine room to the position of the driver's seat was reduced by an average of 8 to 8.8 dB.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Architecture (AREA)
  • Multimedia (AREA)
  • Inorganic Chemistry (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
US13/946,230 2013-04-12 2013-07-19 Polyamide resin composition for sound insulation Abandoned US20140306142A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2013-0040585 2013-04-12
KR1020130040585A KR101526953B1 (ko) 2013-04-12 2013-04-12 차음성 폴리아미드 수지 조성물

Publications (1)

Publication Number Publication Date
US20140306142A1 true US20140306142A1 (en) 2014-10-16

Family

ID=51618259

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/946,230 Abandoned US20140306142A1 (en) 2013-04-12 2013-07-19 Polyamide resin composition for sound insulation

Country Status (4)

Country Link
US (1) US20140306142A1 (zh)
KR (1) KR101526953B1 (zh)
CN (1) CN104098895A (zh)
DE (1) DE102013107386B4 (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220315738A1 (en) * 2019-09-05 2022-10-06 Basf Se Thermoplastic molding compositions that resist heat
US12065565B2 (en) 2018-05-11 2024-08-20 Sabic Global Technologies B.V. Noise reducing filled polyester

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102396826B1 (ko) * 2015-09-15 2022-05-11 코오롱플라스틱 주식회사 폴리아미드 수지 조성물 및 이를 이용한 플라스틱 성형체 제조
CN106243518A (zh) * 2016-08-29 2016-12-21 合肥会通新材料有限公司 一种降低空调噪音聚丙烯复合专用料及其制备方法
KR20190090427A (ko) * 2018-01-25 2019-08-02 현대자동차주식회사 방사소음 저감 폴리아미드 수지 조성물
KR102189102B1 (ko) 2019-04-10 2020-12-09 나홍주 흡음재 및 이의 제조방법
CN112694747A (zh) * 2020-12-17 2021-04-23 辰东意普万新材料(广东)有限公司 一种发动机舱防火墙隔热降噪聚酰胺复合材料

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5744633A (en) * 1980-08-30 1982-03-13 Toyoda Gosei Co Ltd Soundproof material of synthetic resin
JP2996412B2 (ja) * 1990-08-02 1999-12-27 株式会社ブリヂストン 遮音性樹脂組成物
JP4072242B2 (ja) 1997-05-26 2008-04-09 三菱エンジニアリングプラスチックス株式会社 ポリアミド樹脂組成物
JP2004269550A (ja) 2003-03-05 2004-09-30 Toray Ind Inc 遮音性および流動性に優れたポリアミド樹脂組成物およびそれからなる成形品
JP2005232239A (ja) 2004-02-18 2005-09-02 Toray Ind Inc ポリアミド樹脂組成物およびそれからなる成形品
DE102005041966A1 (de) 2005-09-03 2007-03-08 Clariant Produkte (Deutschland) Gmbh Polymere Formmassen auf Basis von thermoplastischen Polyamiden
EP1882719B1 (de) 2006-07-11 2017-04-19 Ems-Chemie Ag Polyamidformmasse und deren Verwendung
CN101583658A (zh) * 2006-08-25 2009-11-18 萨克特本化学有限责任公司 含硫酸钡的复合材料
CN1931920B (zh) * 2006-08-28 2011-09-07 浙江阳光纳米科技有限公司 纳米尼龙复合材料直饮水水表
KR101449048B1 (ko) 2008-10-14 2014-10-13 현대자동차주식회사 자동차 엔진 커버용 폴리아미드6 수지 조성물
KR20100049348A (ko) * 2008-11-03 2010-05-12 현대자동차주식회사 글래스버블을 이용한 자동차 엔진 커버용 수지 조성물
KR20100124621A (ko) * 2009-05-19 2010-11-29 현대자동차주식회사 자동차 기어쉬프트 노브용 폴리아미드 수지 조성물
KR101294073B1 (ko) 2011-10-14 2013-08-07 현대자동차주식회사 차량용 도어 힌지 장착장치

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12065565B2 (en) 2018-05-11 2024-08-20 Sabic Global Technologies B.V. Noise reducing filled polyester
US20220315738A1 (en) * 2019-09-05 2022-10-06 Basf Se Thermoplastic molding compositions that resist heat

Also Published As

Publication number Publication date
DE102013107386B4 (de) 2022-03-10
CN104098895A (zh) 2014-10-15
DE102013107386A1 (de) 2014-10-16
KR20140123341A (ko) 2014-10-22
KR101526953B1 (ko) 2015-06-09

Similar Documents

Publication Publication Date Title
US20140306142A1 (en) Polyamide resin composition for sound insulation
US7365144B2 (en) Polypropylene composite composition
US7442435B2 (en) Long-fiber-reinforced polypropylene compositions and door shield module plate produced with the same
US9200151B2 (en) Polypropylene resin composition
KR20130132961A (ko) 소음 감쇠 조성물
EP3795642A1 (en) Glass fiber-reinforced resin molded article
US9873791B1 (en) Long carbon fiber reinforced thermoplastic resin composition for foam injection and molded article manufactured using the same
KR101714074B1 (ko) 자동차 도어 트림용 폴리프로필렌 수지 조성물
JP2016141809A (ja) 炭素繊維強化熱可塑性樹脂組成物及びこれによって製造された成形品
US20160272136A1 (en) Bumper back-beam for vehicles
US7365143B2 (en) Polypropylene composite composition
US9809707B2 (en) Polymer resin composition, polymer composite tape, and front bumper of automobile
KR102463416B1 (ko) 유리섬유 및 탄소섬유로 강화된 폴리아미드 하이브리드 조성물
KR20170032936A (ko) 폴리아미드 수지 조성물 및 이를 이용한 플라스틱 성형체 제조
US20140228492A1 (en) Polyamide resin composition for wheel cover
US6576699B2 (en) Damping resin composition and molded article using the same
US10533086B2 (en) Polypropylene resin composition and molded product thereof
US20200282614A1 (en) Composite molded article formed from polyamide resin and method of producing same
EP4011950A1 (en) Liquid crystal polyester resin pellets and liquid crystal polyester resin molded article
US9944782B2 (en) Composition of polypropylene having high impact strength and high adhesion
KR102321899B1 (ko) 발포사출용 유리 장섬유 강화 열가소성 수지 조성물 및 이를 이용하여 제조된 배터리팩 하우징
KR20190133930A (ko) 에어 인테이크 호스용 열가소성 수지 조성물 및 이를 이용한 에어 인테이크 호스
US20220388208A1 (en) Casing member for in-vehicle camera and method of manufacturing the same
US20190337271A1 (en) Reinforced polypropylene/micronized tire rubber polymer compatible with structural foam molding process
KR20100008644A (ko) 유리강화 장섬유 폴리프로필렌 아웃사이드 도어핸들 베이스

Legal Events

Date Code Title Description
AS Assignment

Owner name: KIA MOTORS CORPORATION, KOREA, REPUBLIC OF

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:YOUN, JEE-YOUNG;LEE, SANG-ILL;REEL/FRAME:030838/0001

Effective date: 20130605

Owner name: HYUNDAI MOTOR COMPANY, KOREA, REPUBLIC OF

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:YOUN, JEE-YOUNG;LEE, SANG-ILL;REEL/FRAME:030838/0001

Effective date: 20130605

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION