公开(公告)号：JPS6390403A

公开(公告)日：1988-04-21

申请号：JP23592286

申请日：1986-10-02

Applicant: BRIDGESTONE CORP

Inventor： IWAFUNE SEIICHIRO ,  IWATA TOSHIRO

IPC: B60C11/00

Abstract: PURPOSE:To improve resistance to ice and snow without impairing abrasion resistance and heat-generation durability by placing a foam rubber layer having closed cells in the thickness direction of a tread, and differentiating its foaming rate in the thickness direction and in the width direction of said tread. CONSTITUTION:A foam rubber layer 11 having closed cells is provided between both shoulders ranging over the whole thickness of a tread 3. In the foam rubber 12 constituting this foam rubber layer 11, the foaming rate Vs is differentiated between the outermost side part 11a and the innermost side part 11b, making the foaming rate Vs on the outermost side part 11a larger by more than 5% in the difference in foaming rate, than the foaming rate Vs on the innermost side part 11b. By this structure, resistance to ice and snow can be improved without impairing abrasion resistance and heat generation durability.

公开(公告)号：JPS6390402A

公开(公告)日：1988-04-21

申请号：JP23592186

申请日：1986-10-02

Applicant: BRIDGESTONE CORP

Inventor： IWAFUNE SEIICHIRO ,  IWATA TOSHIRO

IPC: B60C11/00

Abstract: PURPOSE:To improve resistance to ice and snow without impairing abrasion resisting performance and heat-generation durability by providing a specific foam rubber layer having a defined rate of volume to the whole volume of a tread on a tread surface side. CONSTITUTION:A foam rubber layer 10 having a volume more than 10% of the whole volume of a tread is formed on the surface part 3a of a tread 3. This foam rubber layer 10 has closed cells having a foaming rate of 5-50% and an average foam diameter of 5-150mum, while containing more than 20 per 1mm unit area of closed cells each having a foam diameter of 30-200mum. Also, its dynamic modulus of elasticity is specified to, 3X10 -13X10 dyn/cm . And, a low temp. softening agent of 2-20pts.wt. is blended with respect to a rubber ingredient of 100pts.wt. By this structure, resistance to ice and snow can be improved without impairing abrasion resistance and heat generation durability.

公开(公告)号：JPS61278549A

公开(公告)日：1986-12-09

申请号：JP11966685

申请日：1985-06-04

Applicant: BRIDGESTONE CORP

Inventor： KAWAMURA MASANORI ,  IKEGAMI MIKIHIKO ,  NODA AKIHIRO ,  KONDO HITOSHI ,  IWAFUNE SEIICHIRO

IPC: C08K3/04 ,  B60C1/00 ,  B60C11/00 ,  C08L7/00 ,  C08L21/00

Abstract: PURPOSE:To improve grip performance, etc. by forming a tread part with rubber obtd. by blending carbon black having specified properties and process oil with a rubber component mainly composed of a styrene/butadiene copolymer rubber having a high styrene content. CONSTITUTION:50-200pts.wt. higher reinforcing carbon black (A) having a nitrogen adsorption surface area of 90-250m /g and 5-200pts.wt. aromatic process oil (B) having a kinematic viscosity at 40 deg.C of 6,000cst or above and a ratio of te kinematic viscosity at 40 deg.C to that at 100 deg.C of 90 or above are blended with 100pts.wt. rubber component composed of 30-100pts.wt. styrene/ butadiene copolymer rubber having a high styrene content and optionally at least 5pts.wt. (halogenated) butyl rubber or butadiene/acrylonitrile copolymer rubber. A tread is prepd. from the rubber compsn. to provide the titled pneu matic tire.

公开(公告)号：JPS61238501A

公开(公告)日：1986-10-23

申请号：JP7918085

申请日：1985-04-16

Applicant: BRIDGESTONE CORP

Inventor： IWAFUNE SEIICHIRO ,  KONDO HITOSHI

IPC: C08K5/34 ,  B60C1/00 ,  C08K5/36 ,  C08K5/40 ,  C08L1/00 ,  C08L7/00 ,  C08L21/00 ,  C08L23/00 ,  C08L27/00 ,  C08L101/00

Abstract: PURPOSE:To improve durability without entailing any damage to abrasion resistance and gripping performance, by constituting a tread with the specified compounded rubber of styrene-butadiene copolymerized rubber or its blended rubber, the specified vulcanization accelerator, a vulcanizing agent and a bismuthamide compound. CONSTITUTION:A rubber composition for a tread is constituted of compounding 0.3-3wt.p. of a vulcanization accelerator of dibenzothiazyldisulfite or the like, 0.3-3wt.p. of sulfur and 0.1-1.5wt.p. of a bismuthamid compound expressed in a chemical equation I (see illustration) to blended rubber of 100wt.p. composed of styrene-butadiene copolymerized rubber or more than 30wt.p. of this rubber and 70wt.p. of rubber selected out of natural rubber or the like. And, the sulfur and the bismuthamid compound are set to 1/1 to 3/1 while the vulcanizing agent and this bismuthamid compound are set to 1/1 to 3/1, respectively. With this constitution, durability is improved.

公开(公告)号：JP2006231879A

公开(公告)日：2006-09-07

申请号：JP2005053939

申请日：2005-02-28

Applicant: Bridgestone Corp ,  株式会社ブリヂストン

Inventor： IWAFUNE SEIICHIRO

IPC: B29B13/06 ,  F26B9/06 ,  F26B25/06

Abstract: PROBLEM TO BE SOLVED: To provide a trolley of a natural rubber drier in which the cleaning frequency for the trolley can be reduced by preventing a remaining rubber from adhering to the trolley with a simple and inexpensive construction.
SOLUTION: In the trolley 10 having a housing part 16 of natural rubber or a space upward of a bottom part 12, the space being made by arranging a plurality of partitions 14 in a lattice-like shape so that they stand on the bottom part 12 of the trolley 10, a slant surface structure 26 obliquely standing-up from the bottom part 12 to contact the inner surface 14e of the partition is mounted in the boundary part 24 between the bottom part 12 and the downward part 14d of the partition, and the slant surface structure 26 makes the dried natural rubber easily peelable from the bottom part 12 in the vicinity of the boundary part 24 to make the remaining rubber hardly adhere to the housing part 16 of the trolley 10 and minimize the remaining rubber in this part.
COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题：为了提供一种天然橡胶干燥器的手推车，其中通过以简单且廉价的结构防止残留的橡胶粘附到手推车上，可以减小手推车的清洁频率。 解决方案：在具有天然橡胶的壳体部分16或底部12的上方的空间的手推车10中，空间通过将多个隔板14布置成格子状而制成，使得它们站立在 手推车10的底部12，从底部12倾斜地竖立而与分隔件的内表面14e接触的倾斜表面结构26安装在底部12和底部12的下部14d之间的边界部分24中 分隔部分和倾斜表面结构26使得干燥的天然橡胶在边界部分24附近容易从底部12剥离，以使剩余的橡胶几乎不粘附到手推车10的壳体部分16上并使其中的剩余橡胶最小化 这部分。 版权所有（C）2006，JPO＆NCIPI

公开(公告)号：JP2001354704A

公开(公告)日：2001-12-25

申请号：JP2000180411

申请日：2000-06-15

Applicant: BRIDGESTONE CORP

Inventor： IWAFUNE SEIICHIRO ,  TORATANI HIROTOSHI ,  KISHIMA KEN ,  HASHIMOTO TAKATSUGU

IPC: C08J3/205 ,  C08C4/00 ,  C08K5/00 ,  C08K5/25 ,  C08L7/00

Abstract: PROBLEM TO BE SOLVED: To provide a method for manufacturing a natural rubber excellent in dispensability of a viscosity stabilizer providing a good viscosity stabilization effect and uniform qualities. SOLUTION: A viscosity stabilizer is added to a crude natural rubber by immersing and/or spraying before drying the rubber. In the manufacture of an RSS-type natural rubber, a viscosity stabilizer is preferably added by immersing and/or spraying in the steps after the coagulation step and before the smoking step. In the manufacture of a TSR-type natural rubber, a viscosity stabilizer is preferably added by immersing and/or spraying before the drying step.

公开(公告)号：JPH0859894A

公开(公告)日：1996-03-05

申请号：JP19554094

申请日：1994-08-19

Applicant: BRIDGESTONE CORP

Inventor： OTA TOSHIYUKI ,  MATSUO KENJI ,  SAKIYAMA ATSUSHI ,  IWAFUNE SEIICHIRO

IPC: C08K3/04 ,  C08K3/00 ,  C08K3/22 ,  C08K3/36 ,  C08K5/00 ,  C08K5/54 ,  C08L9/06 ,  C08L21/00 ,  C08L57/02 ,  C08L61/04 ,  C08L61/14

Abstract: PURPOSE: To obtain a rubber composition which can give a tire tread improved in grip on a wet or semiwet road surface in both low-temperature and high- temperature regions without detriment to wear resistance. CONSTITUTION: This composition comprises 100 pts.wt. rubber component containing at least 70 pts.wt. SBR of a styrene content of 20-60%, 5-150 pts.wt. powdery inorganic compound represented by the general formula, mM .xSiOy.zH2 O [wherein M is at least one metal selected from among Al, Mg, Ti and Ca, oxides thereof, and hydroxide thereof; and (m), (x), (y) and (z) are integers of 1-5, 0-10, 2-5 and 0-10, respectively] and having a particle diameter of 0.01-10μm, 5-150 pts.wt. silica having a nitrogen adsorption specific surface area of 130-280m /g, and 5-170 pts.wt. (the total amount of the inorganic compound, the silica and this component being 80-250 pts.wt.) carbon black having a nitrogen adsorption specific surface area of 80-288m /g and has a content of acetone/chloroform extractibles of 30-270 pts.wt. after vulcanization.

公开(公告)号：JPH0859893A

公开(公告)日：1996-03-05

申请号：JP19553994

申请日：1994-08-19

Applicant: BRIDGESTONE CORP

Inventor： OTA TOSHIYUKI ,  MATSUO KENJI ,  SAKIYAMA ATSUSHI ,  IWAFUNE SEIICHIRO

IPC: C08K3/04 ,  C08K3/00 ,  C08K3/22 ,  C08K3/36 ,  C08L9/06 ,  C08L21/00 ,  C08L57/02 ,  C08L61/04 ,  C08L61/14

Abstract: PURPOSE: To obtain a rubber composition which can give a tire tread improved in grip on a wet or semiwet road surface in both low-temperature and high- temperature regions and in workability. CONSTITUTION: This composition comprises 100 pts.wt. rubber component containing at least 70 pts.wt. styrene/butadiene rubber with a styrene content of 20-60%, 5-150 pts.wt. powdery inorganic compound represented by the general formula, mM .xSiOy .zH2 O [wherein M is at least one metal selected from among Al, Mg, Ti and Ca, oxides thereof, and hydroxides thereof; and (m), (x), (y) and (z) are integers of 1-5, 0-10, 2-5 and 0-10, respectively] and having a particle diameter of 0.01-10μm, and 5-170 pts.wt. (the total amount of the above compound and this component being 70-200 pts.wt.) carbon black having a nitrogen adsorption specific surface area of 80-280m /g and has a content of acetone/chloroform extractibles of 30-270 pts.wt. after vulcanization.

公开(公告)号：JPH0725952B2

公开(公告)日：1995-03-22

申请号：JP23862186

申请日：1986-10-06

Applicant: BRIDGESTONE CORP

Inventor： IWAFUNE SEIICHIRO ,  IWATA TOSHIRO

IPC: B60C1/00 ,  B60C11/00 ,  C08K3/04 ,  C08L21/00

公开(公告)号：JPH0627222B2

公开(公告)日：1994-04-13

申请号：JP9947485

申请日：1985-05-13

Applicant: BRIDGESTONE CORP

Inventor： IWAFUNE SEIICHIRO ,  KONDO HITOSHI

IPC: C08K3/04 ,  C08L7/00 ,  C08L21/00 ,  C08L91/00