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1. 发明专利

DE69511367T2 未知
公开(公告)号：DE69511367T2
公开(公告)日：1999-11-25
申请号：DE69511367
申请日：1995-12-28
申请人： SUMITOMO RUBBER IND
发明人： KIKUCHI NAOHIKO , MATSUMOTO TADAO , OKADA MAIKO
IPC分类号： B60C1/00 , B60C11/00 , B60C13/00 , B60C15/06 , C08K3/04 , C08K7/00 , C08K7/02 , C08L7/00 , C08L9/00 , C08L21/00
摘要： A pneumatic tyre having an aspect ratio of not less than 60% comprises a pair of bead cores (5) disposed one in each bead portion (4), a carcass (6) extending between the bead portions (4) through a tread portion (2) and sidewall portions (3) and turned up around the bead cores (5) to define a pair of turnup portions (6b), a belt (7) disposed radially outside the carcass (6) in the tread portion (2) and comprising belt plies (7A,7B) of which the radially innermost ply (7A) has an axial width (BW) of from 0.8 to 1.2 times the tread width (TW), a pair of bead apexes (9) each tapering radially outwardly from each of the bead cores (5), characterised in that each of the carcass turnup portions (6b) has a radially outer end (X1) at a height (HC) of not more than 0.15 times the tyre section height (H), measured from the bead base line (BL), each of the bead apexes (9) has a radially outer end (9A) at a height (Hb) of not more than 0.25 times the tyre section height (H), measured from the bead base line (BL), a tread rubber (10) disposed in the tread portion (2) to define the ground contacting tread face having a loss tangent of not more than 0.14, a pair of short fibre reinforcing layers (11) each disposed in each of the sidewall portions (3) between the axial outer edges (X2) of the radially innermost belt ply (7A) and the radially outer ends (X1) of the turnup portions (6b) of the carcass (6), and extending along the axially outer surface of the carcass (6), each of the short fibre reinforcing layers (11) having a thickness of from 0.3 to 1.0 mm, the short fibre reinforcing layers (11) being in a compound of 100 parts by weight of a base rubber compound containing 40 to 70 parts by weight of butadiene rubber and 60 to 30 parts by weight of natural rubber and/or isoprene rubber 10 to 30 parts by weight of short fibre, and not more than 30 parts by weight of carbon black whose iodine number is in the range of from 30 to 90mg/g, the short fibre in each of the short fibre reinforcing layers (11) being oriented circumferentially of the tyre so that the direction of orientation of not less than 90% of the short fibre is in the range of from +20 to -20 degrees to the circumferential direction of the tyre, and each of the short fibre reinforcing layers (11) has a directional complex elastic modulus such that the complex elastic modulus E*a in the circumferential direction is not less than 5 times the complex elastic modulus E*b in the radial direction.

2. 发明专利

DE69511367D1 未知
公开(公告)号：DE69511367D1
公开(公告)日：1999-09-16
申请号：DE69511367
申请日：1995-12-28
申请人： SUMITOMO RUBBER IND
发明人： KIKUCHI NAOHIKO , MATSUMOTO TADAO , OKADA MAIKO
IPC分类号： B60C1/00 , B60C11/00 , B60C13/00 , B60C15/06 , C08K3/04 , C08K7/00 , C08K7/02 , C08L7/00 , C08L9/00 , C08L21/00
摘要： A pneumatic tyre having an aspect ratio of not less than 60% comprises a pair of bead cores (5) disposed one in each bead portion (4), a carcass (6) extending between the bead portions (4) through a tread portion (2) and sidewall portions (3) and turned up around the bead cores (5) to define a pair of turnup portions (6b), a belt (7) disposed radially outside the carcass (6) in the tread portion (2) and comprising belt plies (7A,7B) of which the radially innermost ply (7A) has an axial width (BW) of from 0.8 to 1.2 times the tread width (TW), a pair of bead apexes (9) each tapering radially outwardly from each of the bead cores (5), characterised in that each of the carcass turnup portions (6b) has a radially outer end (X1) at a height (HC) of not more than 0.15 times the tyre section height (H), measured from the bead base line (BL), each of the bead apexes (9) has a radially outer end (9A) at a height (Hb) of not more than 0.25 times the tyre section height (H), measured from the bead base line (BL), a tread rubber (10) disposed in the tread portion (2) to define the ground contacting tread face having a loss tangent of not more than 0.14, a pair of short fibre reinforcing layers (11) each disposed in each of the sidewall portions (3) between the axial outer edges (X2) of the radially innermost belt ply (7A) and the radially outer ends (X1) of the turnup portions (6b) of the carcass (6), and extending along the axially outer surface of the carcass (6), each of the short fibre reinforcing layers (11) having a thickness of from 0.3 to 1.0 mm, the short fibre reinforcing layers (11) being in a compound of 100 parts by weight of a base rubber compound containing 40 to 70 parts by weight of butadiene rubber and 60 to 30 parts by weight of natural rubber and/or isoprene rubber 10 to 30 parts by weight of short fibre, and not more than 30 parts by weight of carbon black whose iodine number is in the range of from 30 to 90mg/g, the short fibre in each of the short fibre reinforcing layers (11) being oriented circumferentially of the tyre so that the direction of orientation of not less than 90% of the short fibre is in the range of from +20 to -20 degrees to the circumferential direction of the tyre, and each of the short fibre reinforcing layers (11) has a directional complex elastic modulus such that the complex elastic modulus E*a in the circumferential direction is not less than 5 times the complex elastic modulus E*b in the radial direction.

3. 发明专利

DE69708252T2 未知
公开(公告)号：DE69708252T2
公开(公告)日：2002-05-08
申请号：DE69708252
申请日：1997-12-03
申请人： SUMITOMO RUBBER IND
发明人： KAWAMURA KAZUHIKO , KIMURA TAMISUKE , HAMADA AKIHIKO , MIYAMOTO YOSHIAKI , OKADA MAIKO
IPC分类号： B29C73/22 , B29C73/16 , B29K7/00 , B29L30/00 , C08L7/02 , C09K3/10 , B60G17/00
摘要： A puncture sealing agent for sealing an inner surface of a tyre comprises a deproteinized rubber latex that is formed by removing protein from a natural rubber latex. The puncture sealing agent includes nitrogen content at 0.1 wt.% or less of rubber solid content of the deproteinized rubber latex, and ammonia content at 0.5 wt.% or less of the rubber solid content.

4. 发明专利

DE69708252D1 未知
公开(公告)号：DE69708252D1
公开(公告)日：2001-12-20
申请号：DE69708252
申请日：1997-12-03
申请人： SUMITOMO RUBBER IND
发明人： KAWAMURA KAZUHIKO , KIMURA TAMISUKE , HAMADA AKIHIKO , MIYAMOTO YOSHIAKI , OKADA MAIKO
IPC分类号： B29C73/22 , B29C73/16 , B29K7/00 , B29L30/00 , C08L7/02 , C09K3/10 , B60G17/00
摘要： A puncture sealing agent for sealing an inner surface of a tyre comprises a deproteinized rubber latex that is formed by removing protein from a natural rubber latex. The puncture sealing agent includes nitrogen content at 0.1 wt.% or less of rubber solid content of the deproteinized rubber latex, and ammonia content at 0.5 wt.% or less of the rubber solid content.

5. 发明专利

JPH10217344A FLAT TIRE SEALING AGENT 失效
公开(公告)号：JPH10217344A
公开(公告)日：1998-08-18
申请号：JP31357997
申请日：1997-11-14
申请人： SUMITOMO RUBBER IND
发明人： KAWAMURA KAZUHIKO , KIMURA TAMISUKE , HAMADA AKIHIKO , MIYAMOTO YOSHIAKI , OKADA MAIKO
IPC分类号： B29C73/22 , B29C73/16 , B29K7/00 , B29L30/00 , C08L7/02 , C09K3/10
摘要： PROBLEM TO BE SOLVED: To prevent the corrosion of a steel code caused by decay of protein, and reduce the period of time of solidification by specifying a content of nitrogen of deproteinized rubber latex consisting of removing protein contained in rubber particles in raw rubber from a natural rubber latex and a content of ammonium. SOLUTION: The flat tire sealing agent is of the type where a deproteinized rubber latex having a content of nitrogen of 0.1wt.% or less contained relative to rubber solidification is used in a low ammonium condition of a content of ammonium of 0.5wt.% or less. A stabilizer agent for keeping liquid stability, an adhesion giving agent for increasing the adhesiveness of a latex surface and raising the adhesiveness with the surface of a tire inner recess surface, and a freeze-proofing agent are further added relative to the deprotainized rubber latex. Herein, the deprotainized rubber latex is such that a gel consisting of protein and other impurities contained in rubber particles in raw rubber are removed, and a content of nitrogen is reduced to a level of 0.1wt.% or less with respect to the rubber solidification.

6. 发明专利

JPH08175119A PNEUMATIC TIRE 失效
公开(公告)号：JPH08175119A
公开(公告)日：1996-07-09
申请号：JP33857594
申请日：1994-12-27
申请人： SUMITOMO RUBBER IND
发明人： KIKUCHI NAOHIKO , MATSUMOTO TADAO , OKADA MAIKO
IPC分类号： B60C1/00 , B60C11/00 , B60C13/00 , B60C15/06 , C08K3/04 , C08K7/00 , C08K7/02 , C08L7/00 , C08L9/00 , C08L21/00
摘要： PURPOSE: To provide a pneumatic tire capable of reducing the rolling resistance without impairing the stability and controllability and the riding comfort. CONSTITUTION: A carcass fold-back end X1 is located at the height Hc of =0.3mm and =90% short fiber is oriented at the angle in the range of ±20 deg. relative to the circumferential direction of the tire, and the ratio of the complex elasticity E*a in this direction of orientation to the complex elasticity E*b in the direction orthogonal to the direction of orientation is >=5.

7. 发明专利

JPH1060175A TIRE TREAD RUBBER COMPOSITION 失效
公开(公告)号：JPH1060175A
公开(公告)日：1998-03-03
申请号：JP21350596
申请日：1996-08-13
申请人： SUMITOMO RUBBER IND
发明人： OKADA MAIKO
IPC分类号： B60C1/00 , C08K3/04 , C08K5/00 , C08K5/54 , C08K5/5419 , C08L9/06 , C08L21/00
摘要： PROBLEM TO BE SOLVED: To achieve an improved wet grip by mixing a rubber component containing a specified amount of a styrene/butadiene rubber with carbon black and an acylating agent. SOLUTION: 100 pts.wt. rubber component containing at least 50wt.%, desirably 75-100wt.% styrene/butadiene rubber having a styrene content of about 25wt.% is mixed with 70-110 pts.wt. carbon black having a mean particle diameter of 11-25nm, desirably 15-25nm and a CTAB specific surface area of 100-250m /g, desirably 100-200m /g and 0.05-8 pts.wt. silylating agent (e.g. phenyltriethoxysilane). Subsequently, the obtained mixture is mixed with additives such as an antioxidant, a softener, a vulcanizer and a vulcanization accelerator, and the resulting mixture is kneaded at about 100 deg.C to obtain a tire tread rubber composition.

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