WO2011045950A1 - Matériau d'intérieur pour véhicules à moteur - Google Patents

Matériau d'intérieur pour véhicules à moteur Download PDF

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Publication number
WO2011045950A1
WO2011045950A1 PCT/JP2010/057810 JP2010057810W WO2011045950A1 WO 2011045950 A1 WO2011045950 A1 WO 2011045950A1 JP 2010057810 W JP2010057810 W JP 2010057810W WO 2011045950 A1 WO2011045950 A1 WO 2011045950A1
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Prior art keywords
resin
fiber
paper
breathable
felt
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PCT/JP2010/057810
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English (en)
Japanese (ja)
Inventor
正則 小川
慎 藤井
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名古屋油化株式会社
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.)
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Application filed by 名古屋油化株式会社 filed Critical 名古屋油化株式会社
Priority to JP2010533365A priority Critical patent/JP5060621B2/ja
Priority to CN201080039053.4A priority patent/CN102481881B/zh
Publication of WO2011045950A1 publication Critical patent/WO2011045950A1/fr

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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N3/00—Arrangements or adaptations of other passenger fittings, not otherwise provided for
    • B60N3/04—Arrangements or adaptations of other passenger fittings, not otherwise provided for of floor mats or carpets
    • B60N3/048—Arrangements or adaptations of other passenger fittings, not otherwise provided for of floor mats or carpets characterised by their structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • B60R13/08—Insulating elements, e.g. for sound insulation

Definitions

  • the present invention relates to an automotive interior material mainly used for flooring.
  • Patent Document 1 discloses a nonwoven fabric having a basis weight of 150 to 800 g / m 2 and a bulk density of 0.01 to 0.2 g / cm 3 and an air flow rate measured based on JIS L-1096 of 50 cc / cm 2.
  • Patent Document 2 laminates a nonwoven fabric having a basis weight of 150 to 800 g / m 2 and a bulk density of 0.01 to 0.2 g / m 3 as a skin material.
  • a sound insulation kit is described.
  • the sound-absorbing material or the sound-insulating kit absorbs the energy of sound that has entered the inside by converting it into frictional energy.
  • a structure in which a rubber layer or a resin layer provided with a number of through holes is inserted in addition to the breathable material used in each of the sound absorbing materials has been proposed. Yes.
  • Patent Document 4 describes a structure in which a sound absorbing material layer lined with a rubber layer provided with a plurality of through holes is laminated on the back surface of a floor mat
  • Patent Document 5 discloses an opening above the shape retaining felt layer.
  • needle stick processing is generally applied to a processing method for providing a through hole in the rubber layer or the resin layer.
  • the diameter of the through hole provided by the needle piercing process is determined by the thickness of the needle, there is a problem that it is almost impossible to provide a through hole with a minute diameter, particularly a minute through hole with a diameter of 0.1 mm or less. There is a point. Further, there is a problem that even if the through hole is formed, the through hole is blocked by the elastic restoring force of the resin layer or the rubber layer.
  • a non-breathable resin sheet 4 is laminated on a porous mat 5, and a moldable felt 3 is laminated on the non-breathable resin sheet 4.
  • An automotive interior material 6 in which a breathable outer covering material 2 lined with a paper material 1 is laminated on a felt 3, wherein the paper material 1 has a beating degree of JIS P 8121-1995.
  • the present invention provides an automobile interior material 6 characterized in that it is a paper having a ventilation resistance of 0.07 to 3.00 kPa ⁇ s / m.
  • the paper material 1 is desirably a crepe and / or embossed paper imparted with stretchability by forming a large number of irregularities on the surface, and the basis weight of the paper material 1 is 15 g / m 2 to 50 g / m 2 is desirable.
  • the moldable felt 3 has a basis weight of 50 to 1000 g / m 2 , a thickness of 1.5 mm or more, and a low melting point thermoplastic resin fiber having a melting point of 180 ° C. or less and containing 10 to 50% by mass.
  • the ventilation resistance is preferably 0.04 to 1.50 kPa ⁇ s / m.
  • the beating degree is 4 of JIS P 8121-1995 without using a rubber layer or a resin layer that has a limit on the minimum diameter of the through hole that can be formed.
  • 90% by mass or more of a porous pulp fiber having a Canadian standard freeness prescribed by Canadian Standard Freeness in the range of 350 to 650 ml (CSF) and having a large number of pores opened on the surface The sound absorbing performance is enhanced by using the paper material 1 having a ventilation resistance set in a range of 0.07 to 3.00 kPa ⁇ s / m.
  • the paper material 1 since voids are formed in the fibers themselves in addition to the gaps between the fibers, sound is taken into the gaps between the fibers of the paper material 1 and the fibers themselves. When the fiber vibrates, the sound energy is attenuated as the friction energy is absorbed between the fibers in the paper material 1 inside the paper material 1. Furthermore, since there are a large number of cracks on the surface of the porous pulp fiber, the cracks also absorb sound energy as frictional energy by vibrating with sound. When the freeness of the fiber exceeds 650 ml (CSF) in terms of freeness, the pulp fiber is not sufficiently crushed or concentrically loosened and becomes porous due to a large number of pores opening on the surface of the pulp fiber.
  • CSF ml
  • the energy has already been greatly absorbed by the paper material 1 before the sound reaches the moldable felt 3, and the sound is further absorbed in the moldable felt 3. It is confined by the paper material 1 and the non-breathable resin sheet 4 and efficiently absorbed by irregular reflection.
  • a large number of pores are provided in the pulp fiber itself, so that the air-permeable layer is distributed over the entire surface, and the sound absorption is lower than that in which through holes are provided only at predetermined sites such as conventional resin layers and rubber layers. It is excellent in performance, can be reduced in weight as a whole, and is inexpensive.
  • the interior material 6 of the present invention has an extremely excellent sound absorbing performance, and a lightweight and inexpensive interior material 6 for an automobile is provided.
  • the paper material 1 used for the interior material 6 is made of woody pulp fiber, does not generate a large amount of carbon dioxide gas in the production process like organic synthetic fiber, is decayable, and also has biomass energy (for example, bio-energy). Since it can also be used as a raw material for ethanol, it is also a material that contributes to energy saving measures and global warming prevention measures.
  • the automobile interior material 6 of the present invention is a laminate in which a porous mat 5, a non-breathable resin sheet 4, a moldable felt 3, a paper material 1, and a breathable surface covering material 2 are laminated in order from the bottom. It is.
  • a porous mat 5 a non-breathable resin sheet 4
  • a moldable felt 3 a paper material 1
  • a breathable surface covering material 2 are laminated in order from the bottom.
  • the porous mat 5 imparts a suitable cushioning property to the interior material 6 and keeps the air-impermeable resin sheet 4 at a certain distance from the wall surface, floor surface, etc. in the automobile, thereby providing good sound insulation to the interior material 6. It is an effect.
  • a fiber sheet or a mat used for a breathable outer covering material 2 or a moldable felt 3 described later is used as the porous mat 5.
  • the material of the porous mat 5 include breathable polyurethane foam, breathable polyethylene foam, breathable polypropylene foam, breathable polystyrene foam, breathable phenol resin foam, and breathable melamine resin foam.
  • a sheet or mat made of a breathable plastic foam may be used.
  • the basis weight of the porous mat 5 is desirably 50 to 1000 g / m 2 and the thickness is desirably 5 to 30 mm.
  • Non-breathable resin sheet 4 is, for example, polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, polyvinyl chloride, polyvinylidene chloride, polystyrene, polyvinyl acetate, fluororesin, thermoplastic acrylic resin, Thermoplastic polyester, thermoplastic polyamide, thermoplastic urethane resin, acrylonitrile-butadiene copolymer, styrene-butadiene copolymer, acrylonitrile-butadiene-styrene copolymer, ethylene-propylene copolymer, ethylene-propylene terpolymer, ethylene -A sheet of thermoplastic resin such as vinyl acetate copolymer.
  • the non-breathable resin sheet 4 may be added with a filler such as talc and calcium carbonate, or a colorant such as a pigment.
  • the non-breathable resin sheet 4 contributes good sound insulation performance to the interior material 6 and stabilizes the molded shape when the interior material 6 is molded into a predetermined shape.
  • the non-breathable resin sheet 4 preferably has a basis weight of 20 to 1000 g / m 2 and a thickness of 0.01 to 3.0 mm from the viewpoint of exhibiting good sound insulation performance.
  • thermosetting resin initial condensate is mixed with the fiber as a binder, and if desired, the thermosetting felt in which the initial condensate is in a B state, and a pseudo thermoplastic resin is mixed with the fiber as a binder.
  • thermoplastic felt, and thermoplastic felt in which a thermoplastic resin and / or a low melting point thermoplastic resin fiber is mixed as a binder with the fiber are mixed as a binder with the fiber.
  • thermoplastic felt examples include polyester fiber, polyamide fiber, acrylic fiber, urethane fiber, polyvinyl chloride fiber, poly Synthetic fibers such as vinylidene chloride fiber and acetate fiber, wool, mohair, cashmere, camel hair, alpaca, vicu ⁇ a, angora, silk thread, cotton, gama fiber, pulp, cotton, palm fiber, hemp fiber, bamboo fiber, kenaf fiber, etc.
  • Natural fiber starch-based, polylactic acid-based biodegradable fiber, rayon (man-made silk, sufu), polynosic, cupra, acetate, triacetate and other cellulosic artificial fibers, glass fiber, carbon fiber, ceramic fiber, asbestos fiber, etc. Obtained by defibrating scraps of inorganic fibers and fiber products using these fibers It was a recycled fiber and the like. These fibers are used alone or in combination of two or more.
  • thermosetting resin used in the thermosetting felt examples include a urethane resin, a melamine resin, a thermosetting acrylic resin, particularly a thermosetting acrylic resin that cures by forming an ester bond by heating, Urea resins, phenolic resins, epoxy resins, thermosetting polyester resins, etc.
  • thermosetting resin is preferably used in the form of an aqueous solution, an aqueous emulsion, or an aqueous dispersion because it is easy to handle, but may be used in the form of an organic solvent solution.
  • thermosetting resin used for the moldable felt 3 is a phenolic resin.
  • the phenolic resin is obtained by condensing a phenolic compound with formaldehyde and / or a formaldehyde donor.
  • the phenolic compound used in the phenolic resin may be a monohydric phenol, a polyhydric phenol, or a mixture of a monohydric phenol and a polyhydric phenol.
  • polyhydric phenol or a mixture of monohydric phenol and polyhydric phenol is preferably used. Two or more of the above thermosetting resins or synthetic resin precursors may be used in combination.
  • the pseudo thermoplastic resin used for the pseudo thermoplastic felt is (A) a polymer obtained by radical polymerization of 5 to 100% by mass of an ethylenically unsaturated acid anhydride or an ethylenically unsaturated dicarboxylic acid in which a carboxylic acid group can form an acid anhydride group; (B) an alkanolamine having at least two hydroxyl groups; A phosphorus-containing reaction accelerator less than 1.5% by mass with respect to the sum of (A) + (B); An aqueous binder containing no formaldehyde.
  • the aqueous binder is generally provided in the form of an aqueous emulsion, an aqueous solution, a water-soluble organic solvent solution such as isopropanol, ethanol, or glycol, or a mixed solvent solution of water and the water-soluble organic solvent. It hardens
  • the pseudo thermoplastic resin is currently marketed by BASF under the trade name Acrodur, and there are 950L, DS3530 as an aqueous solution type, and 958D as an aqueous emulsion type.
  • the above acrodea is crosslinked by the esterification reaction at a temperature of approximately 120 ° C. or higher and is cured at a temperature of 160 ° C. or higher.
  • the acrodure has sufficient hardness even in a thermoplastic state before crosslinking and is easy to handle.
  • the hardness is reduced by heating and becomes temporarily thermoplastic (pseudo-thermoplastic), exhibits good moldability, and high molding accuracy is obtained.
  • the cross-linking of the acrodure is based on an esterification reaction, there is an advantage that only water is by-produced and no harmful substances such as formaldehyde are by-produced.
  • thermoplastic resins for example, an aqueous solution type and an aqueous emulsion type may be mixed, or other thermoplastic resin aqueous emulsions and the like may be mixed.
  • the details of the pseudo thermoplastic resin are described in, for example, JP 2000-506940 A.
  • thermoplastic resin used in the thermoplastic felt examples include acrylic ester resin, methacrylic ester resin, ionomer resin, ethylene-ethyl acrylate (EEA) resin, acrylonitrile / styrene / acrylic rubber copolymer (ASA) resin.
  • Acrylonitrile / styrene copolymer (AS) resin, Acrylonitrile / chlorinated polyethylene / styrene copolymer (ACS) resin, Ethylene vinyl acetate copolymer (EVA) resin, Ethylene vinyl alcohol copolymer (EVOH) resin, Methacrylic resin (PMMA) , Polybutadiene (BDR), polystyrene (PS), polyethylene (PE), acrylonitrile-butadiene-styrene copolymer (ABS) resin, chlorinated polyethylene (CPE), polyvinyl chloride (PVC), polyvinylidene chloride PVDC), polypropylene (PP), cellulose acetate (CA) resin, syndiotactic polystyrene (SPS), polyoxymethylene ( polyacetal) (POM), polyamide (PA), polyimide (PI), polyamideimide (PAI), polyetherimide (PEI), polyarylate
  • thermoplastic resins may be used in combination of two or more, and may be used by mixing one or more of a certain amount of thermosetting resin to the extent that does not impair the ease of molding of the thermoplastic resin.
  • the thermoplastic resin is preferably used in the form of an aqueous solution, an aqueous emulsion, or an aqueous dispersion from the viewpoint of easy handling, but may be used in the form of an organic solvent solution.
  • low-melting-point thermoplastic resin fibers having a melting point of 180 ° C. or lower are used instead of the thermoplastic resin or together with the thermoplastic resin.
  • the low melting point thermoplastic resin fiber include polyolefin fibers such as polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, polyvinyl chloride fiber, polyurethane fiber, polyester fiber, polyester copolymer, and the like.
  • polymer fibers, polyamide fibers, polyamide copolymer fibers and the like are used alone or in combination of two or more.
  • these low melting point thermoplastic resin fibers are used as cores and high melting point fibers having a melting point of 200 ° C. or higher are used as sheaths, or high melting point fibers having melting points of 200 ° C. or higher are used as cores, and low melting point thermoplastic resin fibers are used as sheaths.
  • a core-sheath composite fiber or the like is used. When the composite fiber having the core-sheath configuration is used, the rigidity of the felt is improved.
  • the fineness of the low melting point thermoplastic resin fiber is in the range of 0.1 dtex to 60 dtex.
  • the low-melting point thermoplastic resin fiber is usually mixed with 10 to 50% by mass of the fiber.
  • the formable felt 3 is formed by a method in which the fiber web sheet or mat is entangled by needle punching, or the fiber web sheet or mat is made of the low-melting thermoplastic resin fiber, or the low-melting thermoplasticity.
  • the mixed fiber web is heated as it is or after the web is entangled by needle punching to soften the low melting point thermoplastic resin fibers and bind the fibers to each other.
  • the fiber sheet or mat is impregnated with or mixed with a synthetic resin, or the fiber web sheet or mat is entangled by needle punching and then the synthetic resin or synthetic resin precursor powder.
  • the basis weight and thickness of the moldable felt 3 can be arbitrarily set in principle. From the viewpoint of reducing the weight of the interior material 6, the basis weight is preferably 50 to 1000 g / m 2 , more preferably 100 to 500 g / m. 2 and the thickness is preferably 1.5 mm or more from the surface of shape retention. If the moldability felt 3 contains 10 to 50% by mass of low melting point thermoplastic resin fibers having a melting point of 180 ° C. or less, the moldability of the interior material 6 is improved.
  • the paper material 1 used is a paper containing 90% by mass or more of porous pulp fibers and having a ventilation resistance in the range of 0.07 to 3.00 kPa ⁇ s / m.
  • the paper material 1 has a ventilation resistance of less than 0.07 kPa ⁇ s / m, the interior material 6 with good sound absorption performance cannot be obtained.
  • the paper material has a ventilation resistance of more than 3.00 kPa ⁇ s / m. Cannot obtain the interior material 6 with good moldability.
  • the said porous pulp fiber means that the fiber itself has many pores opened on the surface.
  • the porous pulp fiber is made of non-wood plant fiber and / or wood plant fiber, and is usually made of softwood or hardwood chips and has a beating degree of JIS P 8121-1995.
  • This is a porous pulp fiber with a long diameter of 5 ⁇ m to 100 ⁇ m within the range of 350 to 650 ml (CSF) with a Canadian standard freeness prescribed by Canadian Standard Freeness.
  • CSF 650 ml
  • the above beating is usually performed by a conical refiner, a disc refiner, or the like.
  • the average length of the porous pulp fibers is preferably in the range of 0.2 to 30 mm, and the long diameter is preferably 5 to 100 ⁇ m.
  • the average length of the porous pulp fibers is less than 0.2 mm, the entanglement between the fibers in the paper material 1 is insufficient, and the strength of the interior material 6 is reduced.
  • the average length exceeds 30 mm, the fibers themselves becomes easily entangled in a string shape, making it difficult to form a fiber into a sheet.
  • the fiber major axis is less than 5 ⁇ m, the sheet density becomes excessive, the sheet strength is lowered, and when the fiber major axis exceeds 100 ⁇ m, the fiber itself becomes so stiff that it is difficult to entangle the fibers.
  • porous pulp fibers used in the paper material 1 of the present invention may be mixed and used, and the porous pulp fibers and normal fibers (non-porous fibers) may be mixed.
  • the mixing ratio in this case should contain 90% by mass or more of porous pulp fiber, preferably 95% by mass or more, and more preferably 100% from the viewpoint of improving the sound absorption performance of the interior material 6. Should be included by mass%.
  • Normal fiber examples of the normal fiber (non-porous fiber) used in combination with the porous pulp fiber include polyester fiber, polyethylene fiber, polypropylene fiber, polyamide fiber, acrylic fiber, urethane fiber, polyvinyl chloride fiber, polyvinylidene chloride fiber, and acetate.
  • Synthetic fibers such as fibers, biodegradable fibers (polylactic acid fibers) made of starch extracted from plants such as corn and sugarcane, natural fibers such as pulp, cotton, palm fibers, hemp fibers, bamboo fibers, kenaf fibers, glass fibers
  • inorganic fibers such as carbon fibers, ceramic fibers, asbestos fibers, or one or more kinds of recycled fibers obtained by defibrating scraps of textile products using these fibers are used.
  • inorganic fibers such as glass fiber, carbon fiber, ceramic fiber, asbestos fiber, stainless steel fiber, and polymetaphene If a heat-resistant synthetic fiber having a melting point of 250 ° C.
  • aramid fiber such as lenisophthalamide fiber, poly-p-phenylene terephthalamide fiber, polyarylate fiber, polyether ether ketone fiber, polyphenylene sulfide fiber, etc.
  • a fiber sheet with extremely high heat resistance can be obtained.
  • carbon fiber is a useful inorganic fiber in that it can be incinerated and it is difficult for fine pieces to scatter
  • aramid fiber is a flame-retardant synthetic fiber that is relatively inexpensive and easily available.
  • the paper material 1 has a ventilation resistance in the range of 0.07 to 3.00 kPa ⁇ s / m.
  • the ventilation resistance (Pa ⁇ s / m) means the degree of ventilation of the breathable material. It is a measure to represent.
  • This ventilation resistance is measured by a steady flow differential pressure measurement method. As shown in FIG. 1, a test piece T is arranged in a cylindrical air passage W, and the pressure in the air passage W on the start point side of the arrow in the figure in a state of a constant air flow V (the direction of the arrow in the figure). By measuring the pressure difference between P1 and the end point P2 of the arrow in the figure, the ventilation resistance R can be obtained from the following equation.
  • R ⁇ P / V
  • V air flow per unit area (m 3 / m 2 ⁇ s).
  • the ventilation resistance can be measured by, for example, an air permeability tester (product name: KES-F8-AP1, manufactured by Kato Tech Co., Ltd., steady flow differential pressure measurement method).
  • the paper material 1 an extensible paper material having a large number of irregularities on the surface may be used.
  • the stretchable paper material is used, a skin material having excellent sound absorbing performance and good moldability can be obtained.
  • the stretchable paper material examples include crepe paper having a crimped wrinkle formed on the surface, embossed paper having a large number of protrusions formed on the surface, and crepe embossed paper having a crimped wrinkle and many protrusions formed on the surface. Etc. are exemplified.
  • the creped paper is obtained by creping a raw material. In the crepe processing, a wet crepe that is compressed in the vertical direction using a press roll or a doctor blade in a wet paper state and brazed, and a sheet There is a dry crepe that is dried with a Yankee dryer or calendar and then compressed in the longitudinal direction using a doctor blade or the like. In this case, it is desirable that the crepe rate calculated by the following formula is 10 to 50%.
  • Crepe rate (%) (A / B) ⁇ 100
  • A Paper making speed in the paper making process
  • B Paper winding speed That is, the crepe rate is the ratio at which the paper web is compressed in the longitudinal direction (paper making direction) by creping.
  • the crepe rate is less than 10%, the sound absorbing performance of the creped paper is deteriorated and the stretchability is insufficient, and wrinkles are easily generated during molding.
  • the crepe rate exceeds 50%, Again, wrinkles are likely to occur during molding.
  • the embossed paper is formed by pressing a roll (embossing roll) or plate (embossing plate) having a large number of irregularities on the surface against the base paper to form a large number of protrusions on the surface of the paper. It is desirable that the thickness is 0.02 to 2.00 mm, and the number of protrusions is 20 to 200 / cm 2 . When the height of the protrusion is less than 0.02 mm, the sound absorption performance of the embossed paper is deteriorated and the stretchability is insufficient so that wrinkles are easily generated during molding. Even if it exceeds 0.000 mm, wrinkles are likely to occur during molding.
  • the number of protrusions is less than 20 / cm 2 , the sound absorption performance of the embossed paper is deteriorated, the stretchability is insufficient, and wrinkles are easily generated during molding, while the number of protrusions is 200 Even if it exceeds / cm 2 , the sound absorbing performance of the embossed paper deteriorates.
  • the embossed paper 1a (extensible paper material) shown in FIG. 2 has a large number of protrusions 1b on the surface, and the height of the protrusions 1b corresponds to “h” shown in FIG. If crepe paper is used as the base paper, it becomes embossed crepe paper.
  • the basis weight of the paper material is usually about 10 to 60 g / m 2 , but the basis weight of the paper material according to the present invention is desirably 15 to 50 g / m 2 . If the basis weight is too small, the ventilation resistance becomes too low to obtain the desired sound absorption performance, while if too large, the ventilation resistance becomes too high and the sound absorption performance is lowered.
  • breathable outer covering material 2 As the breathable outer covering material 2, a sheet or mat made of fibers similar to those used in the moldable felt 3 is usually used. As with the moldable felt 3, low melting point thermoplastic resin fibers having a melting point of 180 ° C. or lower may be used as the fibers used in the breathable outer covering material 2. Further, the fineness of the low melting point thermoplastic resin fiber used in this case is in the range of 0.1 dtex to 60 dtex, and the low melting point thermoplastic resin fiber is usually mixed with 1 to 50% by mass of the fiber.
  • the fiber sheet or mat used as the breathable outer covering material 2 is a method in which the fiber web sheet or mat is entangled by needle punching in the same manner as described in the method for producing the moldable felt 3 or fiber. If the web sheet or mat is made of the low-melting point thermoplastic resin fiber, or if the low-melting point thermoplastic resin fiber is mixed, the web of the mixed fiber is left as it is or the web is entangled by needle punching.
  • a method of softening the low-melting point thermoplastic resin fibers and bonding the fibers together by heating after combining, or impregnating or mixing the synthetic resin in the fiber sheet or mat, or binding the fibers The web sheet or mat is entangled by needle punching and then the synthetic resin Powder had synthetic resin precursor, solutions, emulsions or mixed latex, a method of forming wear by coating or impregnation, is prepared by a method in which woven knitted the fibers.
  • the basis weight of the fiber sheet or mat is usually set to 50 to 500 g / m 2 and the thickness is usually set to 1 to 10 mm from the viewpoint of the preferable design and appearance of the interior material 6.
  • a raised cloth such as a carpet is usually used.
  • a pile layer such as a cut pile or a loop pile is usually formed on the carpet. Tufting, needle punching, electrostatic flocking, or the like is applied to form the pile layer.
  • a felt made of organic synthetic fibers such as polyester fibers and polypropylene fibers is usually lined as a sound absorbing material.
  • the paper material 1 is lined instead of the felt, so that the sound absorbing performance is superior to the carpet lined with the conventional felt, and the weight of the felt is reduced and the thickness is reduced. It becomes possible, the thickness is reduced correspondingly, and the weight is greatly reduced.
  • the organic synthetic fiber used for the felt emits carbon dioxide in the production process.
  • the paper material of the present invention uses natural pulp fiber that hardly emits carbon dioxide in the production process as a raw material, carbon dioxide emissions can be reduced and natural pulp fiber is decaying. Waste disposal is also easy, and it can be used as biomass energy (for example, a raw material for bioethanol).
  • Synthetic resin In the above-described breathable outer covering material 2 and / or paper material 1, synthetic resin or the like may be applied, impregnated, or mixed in order to impart rigidity or moldability.
  • synthetic resin include a thermoplastic resin and / or a thermosetting resin.
  • thermoplastic resin examples are the same as those used for the moldable felt 3 as the thermoplastic felt, for example, acrylic ester resin, methacrylic ester resin, ionomer resin, ethylene-ethyl acrylate (EEA) resin, acrylonitrile / styrene. ⁇ Acrylic rubber copolymer (ASA) resin, acrylonitrile / styrene copolymer (AS) resin, acrylonitrile / chlorinated polyethylene / styrene copolymer (ACS) resin, ethylene vinyl acetate copolymer (EVA) resin, ethylene vinyl alcohol copolymer (EVOH resin, methacrylic resin (PMMA), polybutadiene (BDR), polystyrene (PS), polyethylene (PE), acrylonitrile-butadiene-styrene copolymer (ABS) resin, chlorinated polyethylene (CPE), polychlorinated Nyl (PVC), polyvinylidene chloride chlor
  • thermoplastic resins may be used in combination of two or more, and may be used by mixing one or more of a certain amount of thermosetting resin to the extent that does not impair the ease of molding of the thermoplastic resin.
  • the thermoplastic resin is preferably in the form of an aqueous solution, an aqueous emulsion, or an aqueous dispersion from the viewpoint of easy handling, but may be in the form of an organic solvent solution.
  • thermosetting resin for example, a urethane resin, a melamine resin, a thermosetting acrylic resin, particularly an ester bond formed by heating, as used in the moldable felt 3 as the thermosetting felt.
  • Thermosetting acrylic resins, urea resins, phenolic resins, epoxy resins, thermosetting polyester resins, and the like that are cured are used.
  • Urethane resin prepolymers and urea resin prepolymers that produce the synthetic resins are used.
  • thermosetting resin is preferably used in the form of an aqueous solution, an aqueous emulsion, or an aqueous dispersion because it is easy to handle, but may be used in the form of an organic solvent solution. Two or more of the above thermosetting resins or synthetic resin precursors may be used in combination.
  • the addition of the synthetic resin, particularly the thermosetting resin improves both the shape retention and rigidity of the breathable outer covering material 2 or the paper material 1.
  • a phenolic resin is particularly desirable as the thermosetting resin used in the present invention.
  • the phenolic resin can be obtained by reacting with an alkali catalyst in excess of formaldehyde with respect to the phenolic compound and reacting with acid catalyst with phenol in excess of formaldehyde.
  • the resole consists of a mixture of various phenol alcohols with added phenol and formaldehyde, and is usually provided in an aqueous solution.
  • the novolak is composed of various derivatives of dihydroxydiphenylmethane based on phenol condensed with phenol alcohol, and is usually provided in powder form.
  • a desirable phenolic resin in the present invention is a phenol-alkylresorcin cocondensate.
  • the phenol-alkylresorcin co-condensate has good stability of the aqueous solution of the co-condensate (initial condensate) and is stored for a long time at room temperature as compared with a condensate (initial condensate) composed only of phenol.
  • a condensate initial condensate
  • the breathable surface covering material 2 and the paper material 1 obtained by impregnating, coating, or mixing the air permeable surface covering material 2 and the paper material 1 and pre-curing have good stability. Even if the paper material 1 is stored for a long time, the moldability is not lost.
  • alkylresorcin has a high reactivity with formaldehydes and captures and reacts with a free aldehyde, so that it also has an advantage of reducing the amount of free aldehyde in the resin.
  • a polyhydric phenol mixture obtained by dry distillation of an Estonia oil shale is inexpensive and contains a large amount of various highly reactive alkylresorcins in addition to 5-methylresorcin. Therefore, it is a particularly preferred polyhydric phenol raw material in the present invention.
  • a catalyst or a pH adjuster may be mixed as necessary.
  • a hardener such as formaldehyde or an alkylolated triazone derivative may be added to and mixed with the initial condensate (including the initial cocondensate) of the phenolic resin of the present invention.
  • the phenolic resin may be sulfomethylated and / or sulfimethylated to improve its stability.
  • the synthetic resin or synthetic resin precursor used in the present invention further includes calcium carbonate, magnesium carbonate, barium sulfate, calcium sulfate, calcium sulfite, calcium phosphate, calcium hydroxide, magnesium hydroxide, aluminum hydroxide, magnesium oxide, Titanium oxide, iron oxide, zinc oxide, alumina, silica, colloidal silica, mica, diatomaceous earth, dolomite, gypsum, talc, clay, asbestos, mica, calcium silicate, bentonite, white carbon, carbon black, iron powder, aluminum powder, Inorganic fillers such as glass powder, stone powder, blast furnace slag, fly ash, cement, zirconia powder; natural rubber or its derivatives; styrene-butadiene rubber, acrylonitrile-butadiene rubber, chloroprene rubber, ethylene-propylene rubber Synthetic rubbers such as isoprene rubber and isoprene-isobutylene rubber; highly water-soluble such as polyvinyl
  • Foam and foam particles pigments, dyes, antioxidants, antistatic agents, crystallization accelerators, phosphorus compounds, nitrogen compounds, sulfur compounds, boron compounds, bromine compounds, guanidine compounds, phosphate compounds Compounds, phosphate compounds, flame retardants such as amino resins, flame retardants, water repellents, Oil repellents, insect repellents, preservatives, waxes, surfactants, lubricants, anti-aging agents, UV absorbers; phthalate plasticizers such as DBP, DOP, dicyclohexyl phthalate and other tricresyl phosphates A plasticizer or the like may be added and mixed.
  • flame retardants such as amino resins, flame retardants, water repellents, Oil repellents, insect repellents, preservatives, waxes, surfactants, lubricants, anti-aging agents, UV absorbers
  • phthalate plasticizers such as DBP, DOP, dicyclohexyl phthalate and other tricres
  • water and oil repellents examples include natural wax, synthetic wax, fluororesin, and silicon resin.
  • the breathable surface covering material 2 or paper material 1 is usually immersed in an aqueous emulsion or aqueous dispersion of the above synthetic resin, or Apply with a knife coater, roll coater, flow coater, etc.
  • the air-permeable covering material 2 or paper material 1 is drawn into a squeeze roll or press machine. Squeeze using. In this case, the thickness of the air permeable covering material 2 or the paper material 1 is reduced.
  • the fiber sheet or mat is low.
  • the thermoplastic resin fiber is composed of a melting point thermoplastic resin fiber or contains a low melting point thermoplastic resin fiber
  • the fiber sheet or mat is heated before the resin impregnation to melt the low melting point thermoplastic resin fiber. It is desirable to bind with the melt.
  • the fiber sheet or mat as the breathable outer covering material 2 or the paper material 1 is further improved in strength and rigidity, the workability at the time of resin impregnation is improved, and the restoration of the thickness after drawing is also remarkable.
  • the air-permeable covering material 2 or the paper material 1 is dried at room temperature or by heating.
  • the impregnation amount of the resin is usually about 10 g / m 2 to 100 g / m 2 . With this amount of resin impregnation, there is almost no effect on the airflow resistance of the air-permeable covering material 2 or the paper material 1.
  • a flame retardant may be added to the breathable outer covering material 2, the paper material 1, or the moldable felt 3.
  • the flame retardant include phosphorus flame retardant, nitrogen flame retardant, sulfur flame retardant, boron flame retardant, bromine flame retardant, guanidine flame retardant, phosphate flame retardant, phosphate ester flame retardant, amino acid Resin-based flame retardant, expanded graphite, etc.
  • the powdery solid flame retardant that is hardly soluble or insoluble in water imparts flame resistance excellent in water resistance and durability to the interior material 6 of the present invention.
  • the air-permeable outer covering material 2 the paper material 1, or the moldable felt 3 of the present invention has a rough structure, the above-mentioned powdery solid flame retardant smoothly penetrates into the interior and has high flame resistance. Or impart nonflammability.
  • a breathable adhesive is applied to the breathable facing material 2 and the paper material 1 and the paper material 1 and the moldable felt 3 if necessary.
  • a normal solution type or aqueous emulsion type adhesive a powder type, a web type, a solution type, or an aqueous emulsion type hot melt adhesive, etc. are used.
  • a porous adhesive layer is used so that air permeability can be secured, and the air permeability of the air permeable covering material 2, paper material 1, and moldable felt 3 is inhibited. do not do.
  • the adhesive is applied in the form of dots by spray coating, silk printing coating, offset printing coating, etc., and the above-mentioned breathable outer covering material 2, paper material 1, moldability felt 3 Ensure breathability.
  • the breathable outer covering material 2 the paper material 1, and the moldable felt 3 may be joined by a method other than adhesion, such as welding or fusion.
  • the interior material 6 is formed into a predetermined shape that conforms to the floor shape of an automobile, for example.
  • a thermoplastic resin is applied and / or impregnated and / or mixed with the breathable outer covering material 2, the paper material 1, or the moldable felt 3, which is a component of the interior material 6, or the breathable outer covering material 2,
  • the formable felt 3 is made of low-melting point thermoplastic resin fibers or contains low-melting point thermoplastic resin fibers
  • the interior material 6 is made of the thermoplastic resin or low-melting point heat.
  • Hot pressing is performed at a temperature equal to or lower than the softening temperature of the plastic resin fiber, or cold pressing is performed after heating at a temperature equal to or higher than the softening temperature.
  • a thermosetting resin when applied to these, it may be molded by hot pressing.
  • Example 1 A breathable outer covering material which is a needle punching nonwoven fabric having a basis weight of 120 g / m 2 and a thickness of 3 mm made of polyester fiber was prepared. Next, a wood pulp composed of 50 parts by mass of softwood pulp and 50 parts by mass of hardwood pulp is used as a raw material, and the beating degree is JIS P 8121-1995 4. It is beaten to a Canadian standard freeness of 490 ml (CSF) as defined by Canadian Standard Freeness, and after a normal paper making process, the crepe rate is 25%, the basis weight is 30 g / m 2 , and the ventilation resistance is 0.84 kPa. A paper material made of s / m porous pulp fibers was prepared.
  • CSF Canadian standard freeness
  • the crepe rate is 25%
  • the basis weight is 30 g / m 2
  • the ventilation resistance is 0.84 kPa.
  • a hot melt adhesive powder made of polyester resin having a melting point of 150 ° C. and a particle size of 200 to 300 ⁇ m was applied on one side of the paper material in a spreading amount of 3 g / m 2 , and then the breathable surface material was laminated on the coated surface.
  • the paper material was lined on the breathable outer covering material by lightly pressing from the paper material side with a heating roll at 0 ° C. From the paper material side, a hot melt adhesive powder having a melting point of 120 ° C. and a particle size of 200 to 300 ⁇ m is applied from the paper material side in a spreading amount of 3 g / m 2 and heated to 140 ° C. to apply the hot melt adhesive to the paper material. Fused.
  • the ventilation resistance of this product was 1.23 kPa ⁇ s / m.
  • a fiber web consisting of 30 parts by mass of low-melting polyester fibers (fineness: 2.2 dtex, melting point: 120 ° C.) and 70 parts by mass of normal polyester fibers (fineness: 6.6 dtex) is heated while being sucked at 180 ° C.
  • the low-melting-point polyester fiber was melted and adhered to the normal polyester fiber to produce a moldable felt having a basis weight of 300 g / m 2 , a thickness of 15 mm, and a ventilation resistance of 0.06 kPa ⁇ s / m.
  • a non-breathable resin sheet which was a sheet of polyamide resin (thickness: 0.2 mm, basis weight: 100 g / m 2 , softening point: 120 ° C.) was produced.
  • a porous mat which is a felt sheet having a thickness of 10 mm and a weight per unit area of 800 g / m 2 by the same composition as the moldable felt, was prepared. At this time, the porous mat is laminated on the paper material side of the breathable covering material lined with the paper material, heated at 180 ° C., and then immediately cooled (breathable covering material-paper material) -formability.
  • the airflow resistance of the laminates laminated and adhered in the order of felt was 1.29 kPa ⁇ s / m.
  • each material obtained above is laminated in the following order: (breathable outer covering material ⁇ paper material) ⁇ moldable felt ⁇ non-breathable resin sheet ⁇ porous mat (the paper material is formed from the breathable outer covering material and the moldability).
  • an interior material (No. 1) having a thickness of 26.0 mm and a weight of 1356 g / m 2 was produced.
  • Example 2 An interior material (No. 2) having a thickness of 26.0 mm and a weight of 1206 g / m 2 was produced in the same manner as in Example 1, except that the basis weight of the moldable felt was 150 g / m 2 . At this time, the airflow resistance of the moldable felt was 0.04 kPa ⁇ s / m, and the same as in Example 1 (breathable outer covering material ⁇ paper material) ⁇ moldable felt were laminated in this order, and then heated / cooled. The airflow resistance of the laminated adhesive was 1.27 kPa ⁇ s / m.
  • Example 3 An interior material (No. 3) having a thickness of 26.0 mm and a weight of 1156 g / m 2 was produced in the same manner as in Example 1, except that the basis weight of the moldable felt was 100 g / m 2 . At this time, the airflow resistance of the moldable felt was 0.03 kPa ⁇ s / m, and the same as in Example 1 (breathable surface material-paper material) -moldable felt were laminated in this order, and then heated-cooled. The airflow resistance of the laminated adhesive was 1.26 kPa ⁇ s / m.
  • Example 4 An interior material (No. 4) having a thickness of 20.0 mm and a weight of 1356 g / m 2 was produced in the same manner as in Example 1, except that the thickness of the moldable felt was 10 mm.
  • the airflow resistance of the moldable felt at this time is 0.07 kPa ⁇ s / m, and the same as in Example 1 (breathable outer covering material ⁇ paper material) ⁇ moldable felt are laminated in this order, and heated and cooled.
  • the ventilation resistance of the laminated adhesive was 1.30 kPa ⁇ s / m.
  • Example 5 In Example 1, a non-breathable resin sheet was used in the same manner except that a polyamide resin sheet (thickness: 1.0 mm, basis weight: 500 g / m 2 ) was used, and the thickness was 26.0 mm and the weight was 1756 g / An interior material (No. 5) of m 2 was produced.
  • Example 1 In Example 1, instead of paper material (including hot-melt adhesive used on both sides of the paper material), polyamide resin (thickness: 0.2 mm, basis weight: 60 g / m 2 , softening point: 120 ° C.) Ventilation was performed in the same manner except that an apertured resin layer having through holes (diameter: about 0.9 to 1.0 mm, number of holes: 130/100 mm ⁇ 100 mm) was used with a heated needle on the sheet made of An interior material (No.
  • the air flow resistance of the open resin layer was 1.17 kPa ⁇ s / m, and in the same manner as in Example 1, the air-permeable surface material, the open resin layer, and the moldable felt were laminated in this order, and heating-cooling was performed.
  • the air flow resistance of the laminated and bonded materials was 1.28 kPa ⁇ s / m.
  • Comparative Example 2 In Comparative Example 1, an interior material (No. 7) having a thickness of 26.0 mm and a weight of 1230 g / m 2 was produced in the same manner except that the weight of the moldable felt was 150 g / m 2 . Incidentally, the ventilation resistance of moldability felt at this time is 0.04 g / m 2, similarly breathable upholstery and Comparative Example 1 - perforated resin layer - are sequentially stacked moldability felt, heating - cooling laminated The gas flow resistance of the bonded material was 1.27 kPa ⁇ s / m.
  • Comparative Example 3 In Comparative Example 1, an interior material (No. 8) having a thickness of 26.0 mm and a weight of 1180 g / m 2 was produced in the same manner except that the basis weight of the moldable felt was 100 g / m 2 . At this time, the air flow resistance of the moldable felt was 0.03 g / m 2 , and in the same manner as in Comparative Example 1, the air permeable surface material, the apertured resin layer, and the moldable felt were laminated in this order, and then heated and cooled to form a laminate. The gas flow resistance of the bonded material was 1.25 kPa ⁇ s / m.
  • Comparative Example 4 In Comparative Example 1, an interior material (No. 9) having a thickness of 20.0 mm and a weight of 1380 g / m 2 was produced in the same manner except that the thickness of the moldable felt was 10 mm. At this time, the air flow resistance of the moldable felt was 0.07 g / m 2 , and in the same manner as in Comparative Example 1, the air permeable surface material, the apertured resin layer, and the moldable felt were laminated in this order, heated and cooled, and laminated. The gas flow resistance of the bonded material was 1.29 kPa ⁇ s / m.
  • Comparative Example 5 In Comparative Example 1, a non-breathable resin sheet was used in the same manner except that a polyamide resin sheet (thickness: 1.0 mm, basis weight: 500 g / m 2 ) was used, and the thickness was 26.0 mm and the weight was 1780 g / An interior material (No. 10) of m 2 was produced.
  • Table 1 shows the results of measuring the sound absorption tests 1 to 8 according to JIS A 1409 “Reverberation chamber method sound absorption coefficient”.
  • Table 2 shows the results obtained by measuring 10 sound insulation tests according to JIS A 1416 “Sound transmission loss”.
  • the interior material No. 6 and no. 9 shows that the sound absorption coefficient is greatly reduced by reducing the thickness of the moldable felt from 15 mm to 10 mm.
  • Example 6 A breathable surface covering material, which is a needle punching nonwoven fabric having a basis weight of 80 g / m 2 and a thickness of 2 mm, made of polyester fiber was produced. Next, wood pulp made from coniferous pulp is used as a raw material, and the beating degree is JIS P 8121-1995 4 using a disc refiner. It is beaten to a Canadian standard freeness of 420 ml (CSF) as specified by Canadian Standard Freeness, and after a normal papermaking process, the crepe rate is 20%, the basis weight is 20 g / m 2 , and the ventilation resistance is 1.14 kPa. A paper material made of s / m porous pulp fibers was prepared.
  • CSF Canadian standard freeness of 420 ml
  • a hot melt adhesive powder made of polyester resin having a melting point of 150 ° C. and a particle size of 200 to 300 ⁇ m was applied on one side of the paper material in a spreading amount of 3 g / m 2 , and then the breathable surface material was laminated on the coated surface.
  • the paper material was lined on the breathable outer covering material by lightly pressing from the paper material side with a heating roll at 0 ° C.
  • the above mixed solution is spray-coated on a fiber web composed of 30 parts by mass of kenaf fibers and 70 parts by mass of normal polyester fibers (fineness: 6.6 dtex) so as to have an application amount of 50 g / m 2 in terms of solid content.
  • a moldable felt having a weight per unit area of 200 g / m 2 , a thickness of 20 mm, and a ventilation resistance of 0.16 kPa ⁇ s / m was produced by heating to 0 ° C. to bring the thermosetting resin into a B state.
  • the non-breathable resin sheet the same non-breathable resin sheet as in Example 1 was used.
  • porous mat which is a melamine foam having a basis weight of 180 g / m 2 and a thickness of 20 mm was produced.
  • each material obtained above is laminated in the following order: (breathable outer covering material ⁇ paper material) ⁇ moldable felt ⁇ non-breathable resin sheet ⁇ porous mat (the paper material is formed from the breathable outer covering material and the moldability).
  • the inner material having a predetermined shape was manufactured by hot press molding at 200 ° C.
  • the obtained interior material was lightweight with a total weight of 653 g / m 2 and was a molded product excellent in flame retardancy, sound absorption and sound insulation.
  • Example 7 In Example 6, the phenol-alkylresorcin initial condensate (solid content: 40% by mass aqueous solution) in the mixed solution used for resin impregnation of the laminate and the moldable felt was converted to Acrodure 958D (solid content: 42% by mass aqueous emulsion).
  • the laminate had a ventilation resistance of 1.34 kPa ⁇ s / m, a moldable felt having a basis weight of 200 g / m 2 , a thickness of 20 mm, and a ventilation resistance of 0.18 kPa ⁇ s / m.
  • heat press molding was performed at 200 ° C. in the same manner as in Example 6 to prepare an interior material having a predetermined shape.
  • the obtained interior material was lightweight and was a molded product excellent in sound absorption and sound insulation.
  • Example 8 In Example 6, the phenol-alkylresorcin initial condensate (solid content: 40% by mass aqueous solution) in the mixed solution used for resin impregnation of the laminate and the moldable felt was added to Acrodure 950 L (solid content: 50% by mass aqueous solution). Acrodea 958D (solid content: 42 mass% aqueous emulsion) was replaced with a 50:50 mass ratio mixed solution, and other components were similarly produced to produce laminates and moldable felts.
  • the laminate had a ventilation resistance of 1.26 kPa ⁇ s / m, a moldable felt having a basis weight of 200 g / m 2 , a thickness of 20 mm, and a ventilation resistance of 0.23 kPa ⁇ s / m.
  • heat press molding was performed at 200 ° C. in the same manner as in Example 6 to prepare an interior material having a predetermined shape.
  • the obtained interior material was lightweight and was a molded product excellent in sound absorption and sound insulation.
  • Example 6 In Example 1 above, except that the paper material was omitted, in the same manner, a breathable outer covering material-moldable felt-non-breathable resin sheet-porous mat were laminated in this order, heated at 180 ° C., and then immediately cooled down. An interior material having a predetermined shape was produced by press molding. The obtained interior material was poor in sound absorption as compared with Example 1, and was unsuitable for use as an automotive interior material.
  • the interior material 6 of the present invention has good sound absorption performance and sound insulation performance, is lighter in weight, and can be made thinner than conventional materials, so that it can be used industrially.
  • Paper material 1a Embossed paper (extensible paper material) 2 Breathable surface material 3 Moldable felt 4 Non-breathable resin sheet 5 Porous mat 6 Automotive interior material R Ventilation resistance

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Transportation (AREA)
  • Laminated Bodies (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
  • Paper (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Passenger Equipment (AREA)

Abstract

La présente invention concerne un matériau d'intérieur pour véhicules à moteur qui est léger et présente d'excellentes performances d'absorption acoustique et d'insonorisation. Ledit matériau d'intérieur peut être obtenu par l'emploi d'un matériau en papier (1) qui comprend au moins 90 % en masse de fibre de pâte à papier poreuse et qui présente une résistance à l'écoulement de l'air s'échelonnant entre 0,07 et 3,00 kPa∙s/m. La fibre de pâte à papier poreuse présente un degré de battement allant de 350 à 650 ml en termes d'indice d'égouttage (CSF) tel que prévu dans JIS P 8121-1995, 4. Indice d'égouttage, et présente des pores multiples qui s'ouvrent à sa surface.
PCT/JP2010/057810 2009-10-13 2010-05-07 Matériau d'intérieur pour véhicules à moteur WO2011045950A1 (fr)

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JP2013181632A (ja) * 2012-03-02 2013-09-12 Aron Kasei Co Ltd 排水管用消音材、排水管用消音材の製造方法、および消音性排水管
CN104424941A (zh) * 2013-09-05 2015-03-18 上海泰瑞电子科技有限公司 一种吸音材料及其制备方法
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US10889331B2 (en) 2017-09-13 2021-01-12 Howa Co., Ltd. Exterior silencer for motor vehicle
CN108189728A (zh) * 2018-01-11 2018-06-22 芜湖市韩源众科汽车新材料有限公司 一种结构改进的汽车发泡地毯及其加工工艺
CN110920155A (zh) * 2018-09-19 2020-03-27 林天连布有限公司 车辆底盖
CN115368692A (zh) * 2022-09-26 2022-11-22 苏州瑞高新材料有限公司 一种阻燃汽车内饰革及其制备工艺
CN115368692B (zh) * 2022-09-26 2023-09-15 苏州瑞高新材料有限公司 一种阻燃汽车内饰革及其制备工艺

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