公开(公告)号：US20180297405A1

公开(公告)日：2018-10-18

申请号：US15767911

申请日：2016-10-21

Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.

Inventor： Ryo MASHITA ,  Hiroyuki KISHIMOTO ,  Ryota KITAGO

IPC: B60C1/00 ,  C08L9/06

Abstract: A pneumatic tire includes bead cores, a carcass ply, an inner liner, and a tread having a volume of the low density region of 35% or more at elongation by an applied stress of 1.5 MPa, a volume of the void portion of 7.5% or less at elongation by an applied stress of 3.0 MPa and a hardness of 65 or more and the crosslinked rubber composition of the present invention having a volume of the low density region of 35% or more at elongation by an applied stress of 1.5 MPa, a volume of the void portion of 7.5 or less at elongation by an applied stress of 3.0 MPa and a hardness of 65 or more are excellent in abrasion resistance.

公开(公告)号：US20220404253A1

公开(公告)日：2022-12-22

申请号：US17752584

申请日：2022-05-24

Applicant: Sumitomo Rubber Industries, Ltd.

Inventor： Ryo MASHITA ,  Hiroyuki KISHIMOTO

IPC: G01N3/56 ,  G01N3/08 ,  G01N3/06 ,  G01N33/44

Abstract: A performance evaluation method for elastic material including rubber or elastomer, the method includes a step of applying a strain to a test piece made of the elastic material to form at least one void inside the test piece, a step of obtaining projected images of the test piece by irradiating the test piece with X-rays at a plurality of times after the at least one void is formed, and a step of obtaining a volume change of the at least one void between the plurality of times based on the projected images, as one of indexes of performance.

公开(公告)号：US20230332990A1

公开(公告)日：2023-10-19

申请号：US18127347

申请日：2023-03-28

Applicant: Sumitomo Rubber Industries, Ltd.

Inventor： Ryo MASHITA ,  Hiroyuki KISHIMOTO

IPC: G01N3/08 ,  G01N3/56 ,  G01N9/36 ,  G01N9/24

CPC classification number: G01N3/08 ,  G01N3/56 ,  G01N9/36 ,  G01N9/24

Abstract: A performance evaluation method for elastic material including rubber or elastomer, the method includes: a step of applying a strain to a test piece made of an elastic material to form at least one low-density portion inside the test piece; after forming the low-density portion, a step of obtaining projected images of the test piece by irradiating the test piece with X-rays at a predetermined first time and at a second time after the first time; a step of identifying the low-density portion based on the projected images at the first time; a step of identifying the low-density portion based on the projected images at the second time; a step of identifying a volume change of the at least one low-density portion between the first time and the second time; and a step of outputting the volume change as one of indicators of performance of the elastic material.

公开(公告)号：US20180304683A1

公开(公告)日：2018-10-25

申请号：US15767964

申请日：2016-10-21

Applicant: SUMITOMO RUBBER INDUSTRIES LTD.

Inventor： Ryo MASHITA ,  Hiroyuki KISHIMOTO ,  Ryota KITAGO

IPC: B60C1/00 ,  B60C11/00 ,  C08L9/00

CPC classification number: B60C1/0008 ,  B60C1/00 ,  B60C1/0016 ,  B60C11/00 ,  B60C11/0041 ,  B60C2001/005 ,  C08L9/00

Abstract: The pneumatic tire of the present invention characterized by comprising: bead cores, a carcass ply, an inner liner and a tread having a volume of the low density region of 35% or more, at elongation by an applied stress of 1.5 MPa, a volume of the void portion of 7.5% or less at elongation by an applied stress of 3.0 MPa and a glass transition temperature of −20° C. or lower, and the crosslinked rubber composition of the present invention having a volume of the low density region of 35% or more at elongation by an applied stress of 1.5 MPa, a volume of the void portion of 7.5 or less at elongation by an applied stress of 3.0 MPa and a glass transition temperature of −20° C. or lower are excellent in abrasion resistance.

公开(公告)号：US20180304682A1

公开(公告)日：2018-10-25

申请号：US15767900

申请日：2016-10-21

Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.

Inventor： Ryo MASHITA ,  Hiroyuki KISHIMOTO ,  Ryota KITAGO

IPC: B60C1/00 ,  G01N23/046 ,  B60C11/00 ,  G01N23/083 ,  C08L9/00

CPC classification number: B60C1/0008 ,  B60C1/00 ,  B60C1/0016 ,  B60C11/00 ,  B60C11/0041 ,  B60C2001/005 ,  C08L9/00 ,  G01N23/046 ,  G01N23/083 ,  G01N2223/076 ,  G01N2223/419 ,  G01N2223/627

Abstract: A pneumatic tire includes bead cores, a carcass ply, an inner liner and the tread, and the crosslinked rubber composition, of the present invention, wherein the tread and the crosslinked rubber composition have a volume of the low density region of 35% or more at elongation by an applied stress of 1.5 MPa, a volume of the void portion of 7.5 or less at elongation by an applied stress of 3.0 MPa and a ratio of 40% by mass or more of a component having a weight-average molecular weight of not less than 1,000,000 in a molecular weight distribution measured by gel permeation chromatography are excellent in abrasion resistance.

公开(公告)号：US20140140483A1

公开(公告)日：2014-05-22

申请号：US14071149

申请日：2013-11-04

Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.

Inventor： Ryo MASHITA ,  Hiroyuki KISHIMOTO ,  Tomomi MASUI

IPC: G01N23/202 ,  G01N23/201

CPC classification number: G01N23/202 ,  G01N23/201 ,  G01N2223/1006 ,  G01N2223/1016 ,  G01N2223/106 ,  G01N2223/623

Abstract: The present invention provides a method for evaluating energy loss in a polymeric material, wherein the method provides sufficient evaluation of the difference in performance between samples with excellent measurement accuracy; a method for evaluating chipping resistance of a polymeric material, wherein the method provides evaluation in a short period of time and at low cost with excellent measurement accuracy; and a method for evaluating abrasion resistance of a polymeric material, wherein the method provides sufficient evaluation of the difference in performance between samples with excellent measurement accuracy. The present invention relates to methods for evaluating energy loss, chipping resistance, and abrasion resistance of a polymeric material, and the methods include irradiating the polymeric material with X-rays or neutrons to perform X-ray scattering measurement or neutron scattering measurement.

Abstract translation: 本发明提供了一种用于评估聚合物材料中的能量损失的方法，其中该方法提供了具有优异测量精度的样品之间的性能差异的充分评估; 评价聚合物材料的耐崩裂性的方法，其中，所述方法在短时间内以低成本提供以优异的测量精度进行评估; 以及用于评价聚合物材料的耐磨性的方法，其中该方法提供了具有优异测量精度的样品之间的性能差异的充分评估。 本发明涉及用于评估聚合材料的能量损失，耐崩裂性和耐磨性的方法，并且所述方法包括用X射线或中子照射聚合物材料以进行X射线散射测量或中子散射测量。

公开(公告)号：US20250043117A1

公开(公告)日：2025-02-06

申请号：US18769797

申请日：2024-07-11

Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.

Inventor： Ryo MASHITA

IPC: C08L9/06 ,  B60C1/00 ,  B60C11/00 ,  C08K5/548 ,  G01N23/00 ,  G01N23/20

Abstract: Provided is a highly accurate method for evaluating the abrasion resistance of rubber compositions. The present disclosure relates to a method for evaluating abrasion resistance of a rubber composition by X-ray scattering measurement or neutron scattering measurement, the method including performing X-ray scattering measurement or neutron scattering measurement in a region q expressed by the following Formula 1 to obtain a scattering intensity curve I(q), fitting the following Formula 2 to the scattering intensity curve I(q) to obtain a mass fractal dimension D, and evaluating the abrasion resistance of the rubber composition based on the mass fractal dimension D, q = 4 ⁢ π ⁢ sin ⁢ ( θ / 2 ) λ ( Formula ⁢ 1 ) ( e : scattering ⁢ angle , λ : wavelength ⁢ of ⁢ x - rays ⁢ or ⁢ neutrons ) I ( q ) ∝ q - D ( Formula ⁢ 2 ) ( D : mass ⁢ fractal ⁢ dimension ) .

公开(公告)号：US20180297404A1

公开(公告)日：2018-10-18

申请号：US15767784

申请日：2016-10-21

Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.

Inventor： Ryo MASHITA ,  Hiroyuki KISHIMOTO ,  Ryota KITAGO

IPC: B60C1/00 ,  B60C11/00 ,  G01N9/24 ,  G01N23/046 ,  G01N23/083 ,  G01N15/08

Abstract: The pneumatic tire of the present invention characterized by comprising: bead cores, a carcass ply, an inner liner disposed at an inner side than the carcass ply in a direction of a tire diameter, and a tread disposed at an outer side than the carcass ply in a direction of a tire diameter and having a volume of the low density region of 35% or more at elongation by an applied stress of 1.5 MPa, a volume of the void portion of 7.5% or less at elongation by an applied stress of 3.0 MPa and a filler dispersibility index ΔG* shown by the following equation (I) of 3 or less and the crosslinked rubber composition having a volume of the low density region of 35% or more at elongation by an applied stress of 1.5 MPa, a volume of the void portion of 7.5 or less at elongation by an applied stress of 3.0 MPa and a filler dispersibility index ΔG* shown by the following equation (I) of 3 or less are excellent in abrasion resistance. ΔG*=(G*(4%)−G*(256%))/G*(256%)  (I) In the equation (I), G* (n %) indicates a shear modulus when an n % strain is applied.

公开(公告)号：US20180290490A1

公开(公告)日：2018-10-11

申请号：US15767056

申请日：2016-10-21

Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.

Inventor： Ryo MASHITA ,  Hiroyuki KISHIMOTO ,  Ryota KITAGO

IPC: B60C1/00 ,  C08L9/00 ,  G01N23/083 ,  G01N23/046

Abstract: The pneumatic tire characterized by comprising the tread and the crosslinked rubber composition, of the present invention, wherein the tread and the crosslinked rubber composition comprise two or more kinds of rubber components and a filler and have a volume of the low density region of 35% or more, a volume of the void portion of 7.5 or less and a filler distribution D represented by the following formula (I) of 2.0 or less are excellent in abrasion resistance. D=(A1/B1)/(A0/B0)  (I) In the formula (I), A1 represents a volume fraction of a rubber component A in a filler gel, B1 represents a volume fraction of a rubber component B in a filler gel, A0 represents a volume fraction of a compounded rubber component A, B0 represents a volume fraction of a compounded rubber component B.

公开(公告)号：US20160282286A1

公开(公告)日：2016-09-29

申请号：US15036634

申请日：2014-11-06

Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.

Inventor： Ryo MASHITA ,  Hiroyuki KISHIMOTO

IPC: G01N23/04 ,  G01M17/03 ,  G01B15/06

CPC classification number: G01N23/046 ,  G01B15/06 ,  G01M17/027 ,  G01M17/028 ,  G01N23/04 ,  G01N2223/401 ,  G01N2223/419 ,  G01N2223/627

Abstract: To observe an elastic material under a dynamically deformed state. [Solution] A method for observing deformation of an elastic material 1 including rubber or elastomer, and an apparatus for capturing a projection image of the elastic material suitably used therefor. The observing method includes: a projection image obtaining step S1 of capturing a projection image of at least a part of the elastic material 1, from a direction perpendicular to an arbitrary axis of the elastic material 1, at a plurality of capture positions P around the axis; a three-dimensional image constructing step S2 of constructing a three-dimensional image 51 of the elastic material 1 from the projection images, and a step of observing the three-dimensional image 51. The projection image obtaining step S1 comprises: a deforming step S12 of deforming the elastic material 1 in predetermined cycles; a signal output step S13 of outputting an capture signal St at a predetermined specific time point during one cycle; and a capturing step S14 of capturing the projection image of the elastic material 1 based on the capture signal St. The deforming step S12, the signal output step S13 and the capturing step S14 are performed at each of the capture positions.

Abstract translation: 在动态变形状态下观察弹性材料。 [解决方案]一种用于观察包括橡胶或弹性体的弹性材料1的变形的方法以及用于捕获适合使用的弹性材料的投影图像的装置。 该观察方法包括：投影图像获取步骤S1，从垂直于弹性材料1的任意轴的方向拍摄弹性材料1的至少一部分的投影图像，围绕该弹性材料1的多个捕获位置P 轴; 从投影图像构成弹性材料1的三维图像51的三维图像构造步骤S2以及观察三维图像51的步骤。投影图像获取步骤S1包括：变形步骤S12 使弹性材料1以预定的周期变形; 信号输出步骤S13，其在一个周期期间在预定的特定时间点输出捕获信号St; 以及基于捕获信号St捕获弹性材料1的投影图像的拍摄步骤S14.在每个拍摄位置处执行变形步骤S12，信号输出步骤S13和拍摄步骤S14。