US20090272932A1 - Sound Insulating Material - Google Patents

Sound Insulating Material Download PDF

Info

Publication number
US20090272932A1
US20090272932A1 US11/991,554 US99155406A US2009272932A1 US 20090272932 A1 US20090272932 A1 US 20090272932A1 US 99155406 A US99155406 A US 99155406A US 2009272932 A1 US2009272932 A1 US 2009272932A1
Authority
US
United States
Prior art keywords
insulating material
sound
sound insulating
thermoplastic resin
parts
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
US11/991,554
Other languages
English (en)
Inventor
Nobuhiko Inui
Joji Yamada
Eduard Karel Offermanns
Armand Alphons Duijsens
Laurens Petrus Vogels
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.)
Sekisui Alveo AG
Sekisui Chemical Co Ltd
Original Assignee
Sekisui Alveo AG
Sekisui Chemical Co Ltd
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 Sekisui Alveo AG, Sekisui Chemical Co Ltd filed Critical Sekisui Alveo AG
Assigned to SEKISUI CHEMICAL CO., LTD., SEKISUI ALVEO AG reassignment SEKISUI CHEMICAL CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: INUI, NOBUHIKO, YAMADA, JOJI, DUIJSENS, ARMAND ALPHONS, OFFERMANNS, EDUARD KAREL, VOGELS, LAURENS PETRUS
Publication of US20090272932A1 publication Critical patent/US20090272932A1/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
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
    • C04B26/02—Macromolecular compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0061—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0066—Use of inorganic compounding ingredients
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
    • C08J9/10—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
    • C08J9/102—Azo-compounds
    • C08J9/103—Azodicarbonamide
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/22—After-treatment of expandable particles; Forming foamed products
    • 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
    • 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
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/52—Sound-insulating materials
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2300/00—Characterised by the use of unspecified polymers
    • C08J2300/22—Thermoplastic resins
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2431/00—Characterised by the use of copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, or carbonic acid, or of a haloformic acid

Definitions

  • the present invention relates to sound insulating materials excellent in sound insulation property and moldability.
  • Patent Document 1 proposes a sound shielding sheet having an elastic modulus at 20° C. of 5 ⁇ 10 7 Pa or less prepared by kneading a binder component containing 90% by weight or more of a rubber component, a filler material component and additives, followed by rolling.
  • This sound shielding sheet contains the filler material component in the binder component in order to possess sound shielding property by increasing the density and therefore it has a high specific gravity. As an adverse result, the sound shielding sheet is so hard that it is difficult to cut and it is poor in moldability in bending or the like.
  • the sound shielding sheet is also poor in extensibility and therefore an attempt to form the sound shielding sheet with a mold has resulted in failure in forming it into a formed article having a desired shape due to generation of cracks in the sheet or breakage of the sheet.
  • Patent Document 1 JP 6-301385 A
  • the present invention provides a sound insulating material excellent in sound insulation property and moldability.
  • the sound insulating material of the present invention is characterized by comprising a thermoplastic resin foam and an inorganic compound contained in the thermoplastic resin foam in an amount of from 30 to 300 parts by weight per 100 parts by weight of the thermoplastic resin forming the thermoplastic resin foam.
  • the sound insulating material of the present invention contains an inorganic compound in a thermoplastic resin foam and is characterized by containing the inorganic compound in an amount of from 30 to 300 parts by weight per 100 parts by weight of the thermoplastic resin forming the thermoplastic resin foam.
  • thermoplastic resin constituting the thermoplastic resin foam is not particularly restricted, and examples thereof include organic materials such as polyolefin-based resins, for example, polyethylene-based resins, e.g. high density polyethylene, medium density polyethylene, low density polyethylene, linear low density polyethylene and ethylene-vinyl acetate copolymers, polypropylene-based resins, e.g. propylene homopolymers and copolymers of propylene and other olefins; polystyrene-based resins; polyester-based resins; polyamide-based resins; polyamide-based resins; and petroleum resins.
  • polyolefin-based resins for example, polyethylene-based resins, e.g. high density polyethylene, medium density polyethylene, low density polyethylene, linear low density polyethylene and ethylene-vinyl acetate copolymers, polypropylene-based resins, e.g. propylene homopolymers and copolymers of propylene and other ole
  • Polyolefin-based resins are preferred, and use of a polyethylene-based resin and an ethylene-vinyl acetate copolymer in combination is more preferred because the sound insulating material excels in rigidity and therefore it has good workability since it hardly deflects or warps during handling.
  • the thermoplastic resin foam By causing the thermoplastic resin foam to contain the inorganic compound in the predetermined amount, the sound insulating material is formed.
  • the inorganic compound include metal hydroxides such as aluminum hydroxide and magnesium hydroxide as well as metal salts of inorganic acids, such as barium sulfate and magnesium sulfate. Since a sound insulating material is heated during molding, metal salts of inorganic acids, which are never decomposed by the application of heat, are preferred and barium sulfate is more preferred.
  • the content of the inorganic compound in the sound insulating material is limited to from 30 to 300 parts by weight, and preferably is from 75 to 250 parts by weight, per 100 parts by weight of the thermoplastic resin forming the thermoplastic resin foam because if the content is too small, the sound insulation property of the sound insulating material will be damaged, and if it is too large, the moldability of the sound insulating material will be damaged.
  • the sound insulating material of the present invention exerts excellent sound insulation performance due to filling of such predetermined amount of an inorganic compound in a thermoplastic resin foam. If a thermoplastic resin is filled in a high concentration with an inorganic filler, especially an inorganic compound having a great specific gravity like barium sulfate, generally, the moldability of the thermoplastic resin will be damaged due to decrease in extensibility thereof and therefore it will become difficult to apply molding methods like vacuum molding.
  • the thermoplastic resin is foamed to be in the form of a thermoplastic resin foam and the inorganic compound is contained in the thermoplastic resin foam.
  • a thermoplastic resin foam by foaming a thermoplastic resin in such a manner, it is possible to increase the elongation at breakage of the thermoplastic resin in its extension, and as a result, it is possible to improve the moldability of the thermoplastic resin foam, i.e., the sound insulating material, and it is possible to mold the sound insulating material accurately into a desired shape using a known molding method, such as vacuum molding.
  • the sound insulating material of the present invention has been caused to have an improved extensibility by forming a thermoplastic resin foam by foaming a thermoplastic resin, it is possible to fill the thermoplastic resin foam with an inorganic compound in a high concentration and, as a result, the sound insulating material of the present invention excels in moldability as well as in sound insulation property.
  • the apparent density of the thermoplastic resin foam containing an inorganic compound, i.e., the sound insulating material is preferably from 0.1 to 0.8 g/cm 3 , and is more preferably from 0.25 to 0.7 g/cm 3 because if it is too small, the sound insulation property of the sound insulating material may be damaged and if it is too large, the moldability of the sound insulating material may be damaged.
  • the apparent density of a sound insulating material is a value measured in accordance with JIS Z6767.
  • the resin magnification ratio of the thermoplastic resin constituting a thermoplastic resin foam is preferably 300% or more, and more preferably 500% or more because if it is too small, the moldability of a sound insulating material may be damaged due to decrease in the extensibility of the thermoplastic resin constituting the thermoplastic resin foam.
  • the resin magnification ratio is preferably 1500% or less, and more preferably 1000% or less because if it is too large, a tear or crack may be formed in a sound insulating material during its molding.
  • the resin magnification ratio of the thermoplastic resin constituting a thermoplastic resin foam is a measure indicating the volumetric expansion ratio before and after the foaming of the thermoplastic resin itself, and specifically, is calculated from the formula 1 shown below.
  • the density of the inorganic compound is represented by A g/cm 3 and the density of the thermoplastic resin constituting the thermoplastic resin foam is represented by B g/cm 3 .
  • the weight of the inorganic compound contained in the thermoplastic resin foam is represented by X g and the weight of the thermoplastic resin is represented by Y g.
  • the apparent density of the entire thermoplastic resin foam containing an inorganic compound is set forth as C g/cm 3 .
  • the density of the thermoplastic resin is the density of the mixture of the thermoplastic resins.
  • the thickness of the sound insulating material is preferably from 2 to 6 mm because if it is too small, the sound insulation property of the sound insulating material may be damaged or the mechanical strength of the sound insulating material may be damaged, while if it is too large, the moldability of the sound insulating material may be damaged.
  • the sound shielding property of the sound insulating material is preferably 5 dB or more, and more preferably 10 dB or more.
  • the method for producing the sound insulating material of the present invention is not particularly restricted and may be, for example, (1) a method of producing a sound insulating material by supplying a foamable resin composition which comprises a thermoplastic resin, an inorganic compound and a pyrolysis-type foaming agent into a versatile stirring apparatus, such as a Labo Plastomill, followed by melt-kneading, then forming a foamable resin sheet by a versatile molding method, such as press molding, followed by optionally crosslinking this foamable resin sheet by application of ionizing radiations, such as electron beam, ⁇ -ray and ⁇ -ray, and then foaming the foamable resin sheet by heating it to a temperature not lower than the decomposition temperature of the pyrolysis-type foaming agent; or (2) a method of producing a sound insulating material continuously by supplying a foamable resin composition which comprises a thermoplastic resin, an inorganic compound and a
  • the pyrolysis-type foaming agent is not particularly restricted if it is one having heretofore been used for the production of foamed products.
  • Examples thereof include azodicarbonamide, benzenesulfonyl hydrazide, dinitrosopentamethylenetetramine, toluenesulfonyl hydrazide, and 4,4-oxybis (benzenesulfonyl hydrazide). These may be used singly or in combination of two or more thereof.
  • the resulting sound insulating material is molded into a shape in conformity with the shape of a member to which sound insulation treatment is intended to be applied, which may be referred to as a “sound-insulated member”, such as automotive floor steel panels, and then is used by being adhered to the sound-insulated member with an adhesive or the like.
  • a conventionally known molding method may be used as the molding method for molding a sound insulating material. Examples of such molding method include vacuum molding and pneumatic molding.
  • the sound insulating material of the present invention has excellent sound insulating properties, especially sound shielding property, and also is excellent in moldability because it comprises a thermoplastic resin foam and an inorganic compound contained in the thermoplastic resin foam in an amount of from 30 to 300 parts by weight per 100 parts by weight of the thermoplastic resin constituting the thermoplastic resin foam.
  • the sound insulating material of the present invention can be molded accurately into a shape in conformity with the shape of a sound-insulated member to which sound insulation treatment is intended to be applied using a known molding method. Accordingly, it can be adhered stably to, for example, automobile floor materials and sound-insulated members such as partition walls separating an engine room and the vehicle interior, almost without forming any gap between the sound insulating material and the sound-insulated member and it is possible to subject the sound-insulated member to sound insulation treatment certainly.
  • the sound insulating material of the present invention excels in rigidity and therefore it has good workability since it hardly deflects or warps during handling of the sound insulating material.
  • the inorganic compound is a metal salt of an inorganic acid
  • it remains stably in the thermoplastic resin foam despite the heat applied during the molding of the sound insulating material and it is possible to mold the sound insulating material into a desired shape without damaging the sound insulation performance thereof.
  • the sound insulating material of the present invention has more improved sound insulation property and moldability when it has an apparent density of from 0.1 to 0.8 g/cm 3 .
  • FIG. 1 A schematic sectional view illustrating the procedure of measuring the moldability of a sound insulating material.
  • the foamable resin composition was
  • the foamable resin sheet was crosslinked by irradiating the foamable resin sheet with 2.0 Mrad electron beam at a condition of 800 KV. This foamable resin sheet was supplied into an oven, and the foamable resin sheet was left at rest at 240° C. for 80 seconds to foam.
  • a sound insulating material was obtained in which barium sulfate was contained in a foamed sheet made of a polyolefin-based resin composed of low density polyethylene and an ethylene-vinyl acetate copolymer.
  • the sound insulating material obtained had an apparent density of 0.33 g/cm 3 and a thickness of 3.7 mm.
  • the resin magnification ratio of the polyolefin-based resin constituting the thermoplastic resin foamed sheet was 650.4%.
  • the polyolefin-based resin composed of the low density polyethylene and the ethylene-vinyl acetate copolymer had a density of 0.9 g/cm 3 and the barium sulfate had a density of 4.3 g/cm 3 .
  • a sound insulating material was obtained in the same manner as in Example 1 except for changing the amount of barium sulfate to 100 parts by weight instead of 150 parts by weight, the amount of azodicarbonamide to 3 parts by weight instead of 4 parts by weight, and the amount of zinc stearate to 0.8 parts by weight instead of 1 part by weight.
  • the sound insulating material obtained had an apparent density of 0.31 g/cm 3 and a thickness of 3.6 mm.
  • the resin magnification ratio of the polyolefin-based resin constituting the thermoplastic resin foamed sheet was 559.7%.
  • a sound insulating material was obtained in the same manner as in Example 1 except for changing the amount of barium sulfate to 50 parts by weight instead of 150 parts by weight, the amount of azodicarbonamide to 2 parts by weight instead of 4 parts by weight, and the amount of zinc stearate to 0.6 parts by weight instead of 1 part by weight.
  • the sound insulating material obtained had an apparent density of 0.32 g/cm 3 and a thickness of 3.7 mm.
  • the resin magnification ratio of the polyolefin-based resin constituting the thermoplastic resin foamed sheet was 411.4%.
  • a sound insulating material was obtained in the same manner as in Example 1 except for changing the amount of barium sulfate to 50 parts by weight instead of 150 parts by weight and the thickness of the foamable resin sheet to 2.0 mm instead of 2.5 mm.
  • the sound insulating material obtained had an apparent density of 0.16 g/cm 3 and a thickness of 3.7 mm.
  • the resin magnification ratio of the polyolefin-based resin constituting the thermoplastic resin foamed sheet was 833.3%.
  • a sound insulating material was obtained in the same manner as in Example 1 except for using no barium sulfate and changing the amount of azodicarbonamide to 1.4 parts by weight instead of 4 parts by weight, and the amount of zinc stearate to 0.4 parts by weight instead of 1 part by weight.
  • the sound insulating material obtained had an apparent density of 0.40 g/cm 3 and a thickness of 3.7 mm.
  • the resin magnification ratio of the polyolefin-based resin constituting the thermoplastic resin foamed sheet was 225.0%.
  • a sound insulating material was obtained in the same manner as in Example 1 except for using no barium sulfate and changing the thickness of the foamable resin sheet to 2.0 mm instead of 2.5 mm.
  • the sound insulating material obtained had an apparent density of 0.11 g/cm 3 and a thickness of 3.8 mm.
  • the resin magnification ratio of the polyolefin-based resin constituting the thermoplastic resin foamed sheet was 818.2%.
  • a sound insulating material was obtained in the same manner as in Example 1 except for changing the amount of barium sulfate to 350 parts by weight instead of 150 parts by weight, the amount of azodicarbonamide to 6 parts by weight instead of 4 parts by weight, the amount of zinc stearate to 1.3 parts by weight instead of 1 part by weight and the thickness of the foamable resin sheet to 2.0 mm instead of 2.5 mm.
  • the sound insulating material obtained had an apparent density of 0.61 g/cm 3 and a thickness of 3.6 mm.
  • the resin magnification ratio of the polyolefin-based resin constituting the thermoplastic resin foamed sheet was 590.7%.
  • EPDM ethylene-propylene-diene rubber
  • a sound insulating material was heated using a far-infrared heater so that the temperature of both surfaces of the sound insulating material would be 140° C.
  • a closed-end cylindrical female mold 1 shown in FIG. 1 was prepared.
  • the sound insulating material was vacuum molded with the female mold 1 and as a result a closed-end cylindrical molded article 2 was obtained which had a flat circular bottom 21 and a cylindrical peripheral wall 22 extending perpendicularly from the periphery of the bottom 21 .
  • the sound insulating material was vacuum molded as deep as possible while satisfying three conditions, namely, that the thickness of the peripheral wall 22 of the molded article 2 is uniform, that neither cracks nor holes are formed in the bottom 21 , and that the thickness of the bottom 21 is almost equal to the thickness of the peripheral wall 22 .
  • a vacuum molding maximum draw ratio (H/D) was calculated from the diameter D of the outer bottom of the molded article and the depth H of the sound insulating material vacuum sucked in the female mold 1 , on the basis of the formula 2 given below. The ratio was used as a measure of the moldability. The greater the vacuum molding maximum draw ratio, the better the moldability of the sound insulating material.
  • Vacuum molding maximum draw ratio( H/D ) depth H /diameter D
  • the vacuum molding maximum draw ratios were 0.8 or more, and each sound insulating material had excellent moldability.
  • the vacuum molding maximum draw ratio was 0.6. At such a level of moldability, it is not possible to mold a sound insulating material accurately into a shape in conformity with the shape of a mold.
  • the sound insulating material of Comparative Example 3 had poor moldability. It was almost impossible to vacuum mold the sound insulating material due to immediate formation of a hole in the bottom.
  • the sound insulating material of Comparative Example 4 had poor moldability. It was impossible to vacuum mold the sound insulating material due to immediate formation of a hole in the bottom.
  • the sound shielding property of a sound insulating material was measured in accordance with JIS A1416, and it was used as a measure of the sound insulation property.
  • a sound insulating material was mounted into an opening for mounting a sound insulating material therein provided in a partition door between a sound generating room and a reverberation room, the opening being in a square form 600 mm on each side. Thus, the opening was closed completely.
  • a sound of 90 dB was generated from the sound source in the sound generating room, and the loudness level A was measured in the reverberation room using a noise level meter (commercial name “Precise Noise Level Meter NA-27” produced by RION Co., Ltd.).
  • the loudness level B was measured in the same way as mentioned above.
  • the sound shielding property was calculated based on the following formula 3:
  • the sound insulating material of the present invention can be applied to sound-insulated members having various shapes because it has excellent sound insulation property and excellent moldability. It therefore can be used in wide variety of applications such as automobile applications, railway applications and building applications.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Ceramic Engineering (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • General Chemical & Material Sciences (AREA)
  • Structural Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
  • Building Environments (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
US11/991,554 2005-09-08 2006-09-05 Sound Insulating Material Abandoned US20090272932A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2005-261283 2005-09-08
JP2005261283 2005-09-08
PCT/JP2006/317566 WO2007034672A1 (ja) 2005-09-08 2006-09-05 防音材

Publications (1)

Publication Number Publication Date
US20090272932A1 true US20090272932A1 (en) 2009-11-05

Family

ID=37888725

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/991,554 Abandoned US20090272932A1 (en) 2005-09-08 2006-09-05 Sound Insulating Material

Country Status (6)

Country Link
US (1) US20090272932A1 (ko)
EP (1) EP1923421A4 (ko)
JP (1) JPWO2007034672A1 (ko)
KR (1) KR20080053287A (ko)
CN (1) CN101258190A (ko)
WO (1) WO2007034672A1 (ko)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101833948B (zh) * 2010-04-14 2011-08-17 南通杰西电器有限公司 一种双重消声器
CN106916363B (zh) * 2015-12-25 2019-06-04 比亚迪股份有限公司 一种隔音材料组合物和车用隔音片材
JP7105073B2 (ja) * 2017-03-23 2022-07-22 株式会社イノアックコーポレーション 防音構造

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4407768A (en) * 1982-01-08 1983-10-04 Phillips Petroleum Company Foamable polymeric composition comprising propylene polymer and hydrated alumina
US20050049322A1 (en) * 2003-08-28 2005-03-03 Nitto Denko Corporation Composition for polyolefin resin foam, foam of the same, and process for producing foam

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS529705B2 (ko) * 1972-02-18 1977-03-17
JP2530299B2 (ja) * 1991-03-27 1996-09-04 イスクラ産業株式会社 吸音性を有するフェンス用遮音板
JP3730152B2 (ja) * 2001-10-02 2005-12-21 三井・デュポンポリケミカル株式会社 非架橋発泡用樹脂組成物及び非架橋発泡体

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4407768A (en) * 1982-01-08 1983-10-04 Phillips Petroleum Company Foamable polymeric composition comprising propylene polymer and hydrated alumina
US20050049322A1 (en) * 2003-08-28 2005-03-03 Nitto Denko Corporation Composition for polyolefin resin foam, foam of the same, and process for producing foam

Also Published As

Publication number Publication date
KR20080053287A (ko) 2008-06-12
EP1923421A4 (en) 2012-05-09
EP1923421A1 (en) 2008-05-21
JPWO2007034672A1 (ja) 2009-03-19
CN101258190A (zh) 2008-09-03
WO2007034672A1 (ja) 2007-03-29

Similar Documents

Publication Publication Date Title
US9193100B2 (en) Method for molding molded foam, and molded foam
US5979902A (en) Cavity sealing article and method
EP1188785B1 (en) Polyolefin foam and polyolefin resin composition
US7887724B2 (en) Heat-foamable sheet, method for manufacturing the same, foaming filler member, and method for filling inner space of hollow member
WO2013114996A1 (ja) 発泡成形品の製造方法および発泡成形品
EP1777435A1 (en) Damping material
EP1849825A1 (en) Composition for foam filling
US20090272932A1 (en) Sound Insulating Material
US20030011091A1 (en) Molded body of thermoplastic resin having sound absorption characteristics
EP3344689B1 (en) Heat expandable foam
WO2005023917A1 (ja) 充填発泡用組成物、充填発泡部材および充填用発泡体
JPH08277339A (ja) ポリオレフィン系電子線架橋発泡体
TW202100636A (zh) 聚烯烴系樹脂發泡薄片及其製造方法
JP3064777B2 (ja) 成形性に優れたポリプロピレン系電子線架橋発泡体
US20100273903A1 (en) Heat-foamable sheet, producing method therefor, and foam filling member
JP4158880B2 (ja) 複合耐火板
WO2020012988A1 (ja) ワイヤーハーネスプロテクタ
EP1016511B1 (en) Molded body of thermoplastic resin having sound absorption characteristics
JP2003105117A (ja) 架橋ポリオレフィン系樹脂発泡体
JP3152719B2 (ja) ポリオレフィン系樹脂架橋発泡体
JP2007071347A (ja) 制振材
JP4731119B2 (ja) 発泡充填部材の製造方法
JP2983304B2 (ja) ポリオレフィン系樹脂架橋発泡体
JP2002003631A (ja) 架橋ポリオレフィン系樹脂発泡体とその製造方法及び自動車用内装材
JPH0649257A (ja) ポリプロピレン架橋発泡体用樹脂組成物

Legal Events

Date Code Title Description
AS Assignment

Owner name: SEKISUI CHEMICAL CO., LTD., JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:INUI, NOBUHIKO;YAMADA, JOJI;OFFERMANNS, EDUARD KAREL;AND OTHERS;REEL/FRAME:020900/0350;SIGNING DATES FROM 20080207 TO 20080304

Owner name: SEKISUI ALVEO AG, SWITZERLAND

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:INUI, NOBUHIKO;YAMADA, JOJI;OFFERMANNS, EDUARD KAREL;AND OTHERS;REEL/FRAME:020900/0350;SIGNING DATES FROM 20080207 TO 20080304

STCB Information on status: application discontinuation

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