摘要:
Pneumatic tire with a durability improved by preventing the oxidation degradation of a belt layer, wherein a cord layer (18) is folded around the the edges of a belt layer (7), wherein an inner part (18a) of the cord layer is disposed between a carcass layer (4) and the belt layer (7) whilst the outer part (18b) of the cord layer is disposed on the outer circumferential side of the belt layer (7); the cords (C) of the cord layer (18) are arranged in parallel and extend continuously, in a straddling manner, between the inner and outer parts (18a, 18b) of the cord layer(18).
摘要:
A pneumatic tire is provided which enables durability thereof to be improved by preventing oxidation degradation of belt layers. In the pneumatic tire, a carcass layer (4) is laid between a pair of bead portions (3) so that the carcass layer (4) links the bead portions (3), an air penetration preventing layer (6) is disposed on the inner surface of the tire along the carcass layer (4), and belt layers (7) are buried in a tread portion at the side of the outer periphery of the carcass layer. In the pneumatic tire, a cord layer (8), which is formed by repeatedly winding a cord in the tire circumferential direction, is disposed between the carcass layer (4) and the belt layers (7), and at least one portion of the cord layer (8) is made close to the outer surface of the tire so that a distance between the cord (8) and the outer surface of the tire is not longer than 2 mm.
摘要:
This invention relates to a vulcanizable layered composition comprising at least two layers and at least one tie layer, wherein the first layer of the two layers comprises an fluid permeation prevention layer, the second layer of the two layers comprises at least one high diene rubber, and the tie layer comprises a mixture of: (1) about 50 to about 95 weight% of at least one halogenated isobutylene containing elastomer; (2) about 5 to about 50 weight % of at least one high diene elastomer; (3) about 20 to about 50 weight % of at least one filler; (4) about 0 to about 30 weight % of at least one processing oil; and (5) at least about 0.2 to about 15 parts per hundred of rubber (phr) of a curing system for the elastomers; wherein said fluid permeation prevention layer comprises a polymer composition having an air permeation coefficient of 25x10 -12 cc·cm/cm 2 sec cmHg (at 30°C) or less and a Young's modulus of 1 to 500 MPa, said polymer composition comprising: (A) at least 10% by weight, based on the total weight of the polymer composition, of at least one thermoplastic engineering resin component having an air permeation coefficient of 25x10 -12 cc·cm/cm 2 sec cmHg (at 30°C) or less and a Young's modulus of more than 500 MPa, where the thermoplastic engineering resin component is selected from the group consisting of polyamide resins, polyester resins, polynitrile resins, polymethacrylate resins, polyvinyl resins, cellulose resins, fluororesins, and imide resins, and (B) at least 10% by weight, based on the total weight of the polymer composition, of at least one elastomer component having an air permeation coefficient of more than 25x10 -12 cc·cm/cm 2 sec cmHg (at 30°C) and a Young's modulus of not more than 500 MPa, where the elastomer component is selected from the group consisting of diene rubbers and the hydrogenates thereof, halogen-containing rubbers, silicone rubbers, sulfur-containing rubbers, fluoro-rubbers, hydrin rubbers, acryl rubbers, ionomers and thermoplastic elastomers, and where the total amount of the component (A) and the component (B) is not less than 30% by weight based on the total weight of the polymer composition, wherein the elastomer component (B) is dispersed in a vulcanized or partially vulcanized state, as a discontinuous phase, in a matrix of the thermoplastic resin component (A) in the polymer composition.
摘要翻译:本发明涉及包含至少两个层和至少一个连接层的可硫化层状组合物,其中两层的第一层包含防止流体渗透的层,所述两层的第二层包含至少一种高二烯橡胶, 所述粘结层包含以下混合物:(1)约50至约95重量%的至少一种含卤代异丁烯的弹性体; (2)约5至约50重量%的至少一种高二烯弹性体; (3)约20至约50重量%的至少一种填料; (4)约0至约30重量%的至少一种加工油; 和(5)至少约0.2至约15份/ 100份橡胶(phr)的弹性体固化体系; 其特征在于,所述流体渗透防止层包含透气系数为25×10 -12cc·cm / cm 2·sec·cmHg(30℃)以下且杨氏模量为1〜500MPa的聚合物组合物,所述聚合物组合物包含: (A)至少10重量%,基于聚合物组合物的总重量,至少一种透气系数为25×10 -12cc·cm / cm 2·sec·cmHg的热塑性工程树脂组分(在30℃ )以下,杨氏模量大于500MPa,其中热塑性工程树脂组分选自聚酰胺树脂,聚酯树脂,聚腈树脂,聚甲基丙烯酸酯树脂,聚乙烯基树脂,纤维素树脂,氟树脂和酰亚胺树脂, 和(B)至少10重量%,基于聚合物组合物的总重量,至少一种具有大于25×10 -12cc·cm / cm 2·sec·cmHg(30℃)的透气系数的弹性体组分 C)和杨氏模量 不大于500MPa,其中弹性体组分选自二烯橡胶及其氢化物,含卤素橡胶,硅橡胶,含硫橡胶,氟橡胶,水泥橡胶,丙烯酸橡胶,离聚物和热塑性塑料 弹性体,并且其中组分(A)和组分(B)的总量基于聚合物组合物的总重量不小于30重量%,其中弹性体组分(B)分散在硫化或 作为不连续相的部分硫化状态在聚合物组合物中的热塑性树脂组分(A)的基质中。
摘要:
The present invention relates to a pneumatic tire providing at least at part of the bead toe portion a rubber composition containing 70 to 100 parts by weight of an ethylenic unsaturated nitrile-conjugated diene-based highly saturated rubber having a content of conjugated diene units of not more than 30 percent by weight and containing 20 to 120 parts by weight of zinc methacrylate.
摘要:
This invention relates to a vulcanizable layered composition comprising at least two layers and at least one tie layer, wherein the first layer of the two layers comprises an fluid permeation prevention layer, the second layer of the two layers comprises at least one high diene rubber, and the tie layer comprises a mixture of: (1) about 50 to about 95 weight% of at least one halogenated isobutylene containing elastomer; (2) about 5 to about 50 weight % of at least one high diene elastomer; (3) about 20 to about 50 weight % of at least one filler; (4) about 0 to about 30 weight % of at least one processing oil; and (5) at least about 0.2 to about 15 parts per hundred of rubber (phr) of a curing system for the elastomers; wherein said fluid permeation prevention layer comprises a polymer composition having an air permeation coefficient of 25x10 -12 cc·cm/cm 2 sec cmHg (at 30°C) or less and a Young's modulus of 1 to 500 MPa, said polymer composition comprising: (A) at least 10% by weight, based on the total weight of the polymer composition, of at least one thermoplastic engineering resin component having an air permeation coefficient of 25x10 -12 cc·cm/cm 2 sec cmHg (at 30°C) or less and a Young's modulus of more than 500 MPa, where the thermoplastic engineering resin component is selected from the group consisting of polyamide resins, polyester resins, polynitrile resins, polymethacrylate resins, polyvinyl resins, cellulose resins, fluororesins, and imide resins, and (B) at least 10% by weight, based on the total weight of the polymer composition, of at least one elastomer component having an air permeation coefficient of more than 25x10 -12 cc·cm/cm 2 sec cmHg (at 30°C) and a Young's modulus of not more than 500 MPa, where the elastomer component is selected from the group consisting of diene rubbers and the hydrogenates thereof, halogen-containing rubbers, silicone rubbers, sulfur-containing rubbers, fluoro-rubbers, hydrin rubbers, acryl rubbers, ionomers and thermoplastic elastomers, and where the total amount of the component (A) and the component (B) is not less than 30% by weight based on the total weight of the polymer composition, wherein the elastomer component (B) is dispersed in a vulcanized or partially vulcanized state, as a discontinuous phase, in a matrix of the thermoplastic resin component (A) in the polymer composition.
摘要:
Provided is a method of manufacturing a pneumatic tire, which is capable of reducing tire failure without leading to reduction in productivity, the method including: folding a cylindrical film made of thermoplastic resin or thermoplastic elastomer composition into a sheet shape; stacking rubber layers on both surfaces of the folded film in a manner that the rubber layers protrude from both edge portions of the film; forming a laminate by cutting protruding parts of the rubber layers into rubber protruding portions each having an amount of protrusion (h) in a range from 3 mm to 20 mm; expanding the laminate into a cylindrical shape and fitting the laminate onto a tire making drum; pressing down each rubber protruding portion toward the surface of the drum by use of a pressure roller; pasting other components of a tire onto the laminate to form an uncured tire; and curing the uncured tire.
摘要:
A brake control device (12,14,16) is provided to a wheel (22) equipped with a tire (20), which has a function of applying a brake force to the wheel to put a brake thereon while adjusting the brake force. In the device, an acceleration sensor (24) outputs acceleration data in a radial direction of the rotating tire, a predetermined detection range is set with respect to the acceleration data, a threshold value is set with respect to a corresponding part of the acceleration data falling within the detection range, the corresponding part of the acceleration data falling within the detection range is specified. Values of the specified acceleration data are compared with the threshold value, and a control signal for causing a braking device (14) to adjust the brake force thereof is output in a case where some values of the acceleration data are larger than the threshold value.