WO2022213252A1 - Tissu non tissé, pneumatique le comprenant et procédé de fabrication de pneumatique - Google Patents

Tissu non tissé, pneumatique le comprenant et procédé de fabrication de pneumatique Download PDF

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Publication number
WO2022213252A1
WO2022213252A1 PCT/CN2021/085607 CN2021085607W WO2022213252A1 WO 2022213252 A1 WO2022213252 A1 WO 2022213252A1 CN 2021085607 W CN2021085607 W CN 2021085607W WO 2022213252 A1 WO2022213252 A1 WO 2022213252A1
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WO
WIPO (PCT)
Prior art keywords
nonwoven fabric
tire
particles
vulcanized tire
polymeric fibers
Prior art date
Application number
PCT/CN2021/085607
Other languages
English (en)
Inventor
Zhen Wu
Travis L. Potts
Seungkyu Lee
Rui CAO
Tongyang SHI
Liyun REN
Yongbeom Seo
David A. GRIES
Anne C.F. Gold
Silvia G-B. GUTTMANN
Original Assignee
3M Innovative Properties Company
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 3M Innovative Properties Company filed Critical 3M Innovative Properties Company
Priority to PCT/CN2021/085607 priority Critical patent/WO2022213252A1/fr
Publication of WO2022213252A1 publication Critical patent/WO2022213252A1/fr

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Classifications

    • 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
    • G10K11/165—Particles in a matrix
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C19/00—Tyre parts or constructions not otherwise provided for
    • B60C19/002—Noise damping elements provided in the tyre structure or attached thereto, e.g. in the tyre interior
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
    • B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
    • B60C9/1807—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers comprising fabric reinforcements

Definitions

  • Sound absorbing materials can be added to a pneumatic tire after it has been vulcanized to reduce road noise.
  • a pre-vulcanized tire in some aspects of the present description, includes a nonwoven fabric extending in a circumferential direction of the pre-vulcanized tire.
  • the nonwoven fabric includes polymeric fibers and particles in contact with the polymeric fibers.
  • the nonwoven fabric can include the particles at 20 to 95 weight percent.
  • a pneumatic tire in some aspects of the present description, includes an outer annular portion extending in a circumferential direction thereof.
  • the outer annular portion includes a rubber inner liner.
  • the pneumatic tire includes a nonwoven fabric directly attached to the rubber inner layer and substantially coextensive with the outer annular portion along the circumferential direction.
  • the nonwoven fabric includes polymeric fibers and particles in contact with the polymeric fibers.
  • FIG. 5 is a schematic illustration of compressing a fabric.
  • FIGS. 10-11 are schematic cross-sectional views of illustrative layers included in a pre-vulcanized tire or in a pneumatic tire, according to some embodiments.
  • a “nonwoven fabric” is a fabric including a nonwoven fibrous layer, which may be a particle loaded fibrous layer (e.g., the nonwoven fibrous layer may include a web of fibers and particles dispersed in the web of fibers) , making up greater than 50%of the basis weight (weight per unit area) of the fabric. In some embodiments, the nonwoven fibrous layer makes up greater than 70%, or greater than 90%, or about 100%of the basis weight of the fabric.
  • a nonwoven fibrous layer includes a plurality of fibers characterized by entanglement or point bonding of the fibers to form a sheet or mat exhibiting a structure including individual fibers or filaments which are interlaid, but not in an identifiable manner as in a knitted fabric.
  • the thickness is a specified fraction of a cavity depth D (see, e.g., FIG. 8A) of a pneumatic tire.
  • the thickness may be in a range of 0.004 to 0.5 times D or 0.004 to 0.3 times D.
  • the nonwoven fabric 100 can have a thickness in any of these ranges prior to being incorporated into the tire (e.g., prior to molding a pre-vulcanized tire) and/or after being incorporated into the tire (e.g., after molding the pre-vulcanized tire) .
  • the nonwoven fabric 100 is incorporated into a pneumatic tire as described further elsewhere herein.
  • the nonwoven fabric 100 is adapted to substantially reduce a tire cavity resonance in a frequency range of f1 to f2 (e.g., 100 Hz to 400 Hz) .
  • the power spectral density (PSD) of a ratio of a spindle force to a road excitation may define a vertical cavity mode resonance at a frequency in a range of f1 to f2 and the nonwoven fabric 100 may reduce the PSD at this resonance frequency by a factor of at least 10, or at least 100, or at least 1000.
  • At least one additional aliphatic diol is added into a PBT-based resin as generally described in U.S. Pat. Appl. Pub. No. 2007/0232177 (Imes et al. ) .
  • Adding branched or cycloaliphatic diol in a polybutylene ester resin in addition to an aromatic dicarboxylic acid and butanediol can significantly induce PBT melt-blown web bonding.
  • PBT fibrous media can be modified by alkaline hydrolysis and low-temperature plasma.
  • PBT fibers are bonded through bi-component fiber composition with olefinic grafted polymer/linear ethylene polymers as generally described in U.S. Pat.
  • the nonwoven fabric 100 includes the particles 104 at 20 to 95 weight percent, or 30 to 95 weight percent, or 50 to 90 weight percent, or 60 to 90 weight percent, or 70 to 85 weight percent.
  • the particles 104 may be or include porous particles. Porous particles may be used to increase sound absorption of the nonwoven fabric 100.
  • a particle is generally a small distinct piece or individual part of a material in finely divided form.
  • a particle may also include a collection of individual particles associated or clustered together in finely divided form. Thus, individual particles may clump, physically intermesh, electrostatically associate, or otherwise associate to form larger particles.
  • particles in the form of agglomerates of individual particles may be formed as described in U.S. Pat. No. 5,332,426 (Tang et al) , for example.
  • FIG. 2 is a schematic cross-sectional view of an illustrative porous particle 104, according to some embodiments.
  • the particles 104 have a number average particle size D in a range of 10 micrometers to 1000 micrometers, or 30 micrometers to 500 micrometers.
  • the particle size refers to the largest dimension of the particle.
  • the particles can have any suitable shape.
  • the particles are generally spherical particles.
  • the particles may have an irregular shape.
  • the particle 104 includes pores 106 having an average pore size d which may be in a range of 0.4 nm to 200 nm, or 0.4 nm to 100 nm, for example.
  • FIG. 3 schematically illustrates applying a force F to a nonwoven fabric 100 having an initial length L0 and a stretched length L1.
  • the elongation at break is (L1-L0) /L0 times 100%when L1 is the length just before nonwoven fabric 100 breaks due to stretching.
  • the elongation at break can be determined according to ASTM D638-14 “Standard Test Method for Tensile Properties of Plastics” , for example.
  • the Type 1 sample geometry defined in ASTM D638-14 may be used and the test may be carried out at 22 °C and 55%relative humidity, for example.
  • the nonwoven fabric has a thickness that changes by less than about 60%, or less than about 55%, or less than about 50%, or less than about 46%, or less than about 42%, or less than about 38%, or less than about 35%after a pressure of at least 1000 kPa at a temperature of at least 130 °C is applied for at least 10 minutes and then removed.
  • the nonwoven fabric 100 has a thickness (e.g., H0 or H2 depicted in FIG. 5, or H0’ or H depicted in FIG. 7) in a range of about 1 mm to 30 mm, or 2 mm to 20 mm, or 2 mm to 18 mm or in a range of 0.004 to 0.5 times D or in a range of 0.0004 to 0.3 times D, where D is a cavity depth of a pneumatic tire 200 (see, e.g., FIG. 7) , or the thickness can be in any range described elsewhere herein.
  • the preform can include layers in only portions of the preform (e.g., near edges of the preform to form sidewall portions of the tire) , for example, so that the preform may have different thickness in different regions and so be only approximately cylindrical.
  • the preform can be shaped by moving ends of the substantially cylindrical preform towards one another while expanding a central portion of the preform.
  • the molding and vulcanization can be carried out a temperature of at least 120 °C and a pressure of at least 300 kPa, or at least 500 kPa, or at least 800 kPa, or at least 1000 kPa, or at least 1200 kPa, or at least 1500 kPa for at least 10 minutes, for example.
  • An Instron system (Available from Instron, Norwood, MA) Model 5966 was used to measure the elongation at break of samples according to ASTM D638-14.
  • the sample size was modified for measuring the skip-slit samples as the typical ASTM D638-14 geometry was not suitable for making this measurement (e.g., the samples needed to be longer and wider to fully show the influence of slit geometry) .
  • a sample size of 76mm (test width) x 114.3 mm (test length) was used for Example E3 and Comparative Example C5.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Tires In General (AREA)

Abstract

Un tissu non tissé (100) comprend des fibres polymères (102) et des particules (104) en contact avec les fibres polymères (102) et présente un allongement à la rupture d'au moins 60 % et une épaisseur qui varie de moins d'environ 60 % après qu'une pression d'au moins 300 kPa à une température d'au moins 120 °C est appliquée pendant au moins 10 minutes, puis supprimée. Un pneumatique (200) peut comprendre le tissu non tissé (100) pour absorber le son. Un procédé de fabrication d'un pneumatique (200) consiste à fournir un pneu pré-vulcanisé (212) comprenant un tissu non tissé (100) et à mouler le pneu pré-vulcanisé (212) à une température d'au moins 120 °C et une pression d'au moins 300 kPa pendant au moins 10 minutes pour former le pneumatique (200).
PCT/CN2021/085607 2021-04-06 2021-04-06 Tissu non tissé, pneumatique le comprenant et procédé de fabrication de pneumatique WO2022213252A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2021/085607 WO2022213252A1 (fr) 2021-04-06 2021-04-06 Tissu non tissé, pneumatique le comprenant et procédé de fabrication de pneumatique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2021/085607 WO2022213252A1 (fr) 2021-04-06 2021-04-06 Tissu non tissé, pneumatique le comprenant et procédé de fabrication de pneumatique

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WO2022213252A1 true WO2022213252A1 (fr) 2022-10-13

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004082387A (ja) * 2002-08-23 2004-03-18 Bridgestone Corp 空気入りタイヤの製造方法、空気入りタイヤ、及びタイヤ・リム組立体
JP2009029098A (ja) * 2007-06-28 2009-02-12 Bridgestone Corp 空気入りタイヤの製造方法及び空気入りタイヤ
JP2011025832A (ja) * 2009-07-27 2011-02-10 Bridgestone Corp 空気入りタイヤ
CN106716521A (zh) * 2014-09-30 2017-05-24 米其林集团总公司 吸音体
CN109927198A (zh) * 2019-04-09 2019-06-25 江苏通用科技股份有限公司 充气轮胎用吸音降噪材料的制备方法
CN111263961A (zh) * 2017-10-19 2020-06-09 3M创新有限公司 声学制品和相关方法
CN112218697A (zh) * 2018-06-25 2021-01-12 泽费罗斯股份有限公司 用于非织造材料的功能性插入物

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004082387A (ja) * 2002-08-23 2004-03-18 Bridgestone Corp 空気入りタイヤの製造方法、空気入りタイヤ、及びタイヤ・リム組立体
JP2009029098A (ja) * 2007-06-28 2009-02-12 Bridgestone Corp 空気入りタイヤの製造方法及び空気入りタイヤ
JP2011025832A (ja) * 2009-07-27 2011-02-10 Bridgestone Corp 空気入りタイヤ
CN106716521A (zh) * 2014-09-30 2017-05-24 米其林集团总公司 吸音体
CN111263961A (zh) * 2017-10-19 2020-06-09 3M创新有限公司 声学制品和相关方法
CN112218697A (zh) * 2018-06-25 2021-01-12 泽费罗斯股份有限公司 用于非织造材料的功能性插入物
CN109927198A (zh) * 2019-04-09 2019-06-25 江苏通用科技股份有限公司 充气轮胎用吸音降噪材料的制备方法

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