Abstract: There is provided a pneumatic tire including an inner liner provided therein to improve air permeability resistance, flection fatigue resistance, and cracking resistance. In the pneumatic tire including the inner liner provided therein, the inner liner is formed of at least one polymer sheet containing a styrene-isobutylene-styrene triblock copolymer, and an average thickness Gs of a buttress region Rs is smaller than an average thickness Gb of a bead region Rb, the buttress region Rs extending from a tire maximum width position to a corresponding position Lu of a belt layer end, the bead region Rb extending from the tire maximum width position to a bead toe.

Abstract: A pneumatic tire is provided which includes a polymer sheet for an inner liner composed of a polymer composition including: a polymer component containing more than or equal to 5% by mass and less than or equal to 40% by mass of a styrene-isobutylene-styrene triblock copolymer and more than or equal to 60% by mass and less than or equal to 95% by mass of a rubber component of at least one kind selected from the group consisting of natural rubber, isoprene rubber, and butyl rubber; and more than or equal to 0.1 part by mass and less than or equal to 5 parts by mass of sulfur with respect to 100 parts by mass of the polymer component. The pneumatic tire has sufficient tackiness before vulcanization and vulcanization adhesiveness between the inner liner and a member adjacent thereto, and exhibits excellent air permeation resistance.

Abstract: A runflat tire includes a tire body, a carcass extending from a tread portion through sidewall portions of the tire body to bead cores in bead portions of the tire body, and sidewall-reinforcing rubber layers having cross-sectional crescent shapes and positioned on inner sides of the carcass along the sidewall portions, respectively. The tire body has height Ha in range of 8˜17 mm where the height Ha is measured from a rim line of the tire body to inner edge of an innermost dimple/fin row of the tire body in radial direction of the tire body, the innermost row is formed in dimple/fin forming region including one or more dimple/fin rows having dimple/fin portions arrayed in circumferential direction of the tire body, and the dimple/fin forming region is formed on external surface of a sidewall portion on outer side of the rim line in the radial direction.

Abstract: Provided is a pneumatic tire including an inner liner on a tire inner side of a carcass ply laid between a pair of bead parts, the inner liner having a first layer made of a first polymer composition, the first polymer composition containing not less than 0.5 parts by mass and not more than 70 parts by mass of at least one selected from the group consisting of liquid polyisoprene, a maleic anhydride adduct of liquid polyisoprene, and a maleic acid monomethyl ester adduct of liquid polyisoprene, relative to 100 parts by mass of a styrene-isobutylene-styrene triblock copolymer.

Abstract: A pneumatic tire includes: an air permeation preventive layer disposed in the inner surface of the tire; a belt layer buried in a tread part; and a cord layer formed by arranging a plurality of cords. The cord layer is disposed between the air permeation preventive layer and the belt layer, and extends to a bead part side further from a tire maximum width position. At least a part of the cord layer is located close to the outer surface of the tire, at a position closer to the bead part side than the tire maximum width position, so that the distance between the cords and the outer surface of the tire is not more than 2 mm.

Abstract: In order to improve fatigue durability of a thermoplastic elastomer composition composed of a matrix phase of a thermoplastic resin and dispersed phases of a rubber, the thermoplastic elastomer composition comprises (A) 100 parts by weight of a halogenated poly(isoolefin-co-p-alkylstyrene) rubber, (B) 40 to 120 parts by weight of a polyamide resin, and (C) 0.5 to 10 parts by weight of an amine having at least one hydroxyl group. The amine (C) having at least one hydroxyl group is preferably a compound represented by formula (1): where R1 is a C1-30 alkyl; R2 is —(C2H4O)n—H, where n is an integer of 1 to 30; and R3 is —(C2H4O)m—H, where m is an integer of 1 to 30, a C1-30 alkyl, or hydrogen.

Abstract: A puncture-resistant multilayer laminate that is impermeable to inflation gases, comprising: a gastight first elastomer layer comprising a polystyrene/polyisobutylene block copolymer thermoplastic elastomer, and optionally an extender oil with a content within a range of 0 to less than 100 phr; and a self-sealing second elastomer layer comprising a thermoplastic styrene elastomer, identical to or different from the first elastomer, and an extender oil with a content greater than 200 phr.

Abstract: Provided is a process of manufacturing a pneumatic tire, which prevents blisters from being raised on a cylindrical thermoplastic resin film due to an air pocket even in a case where the cylindrical thermoplastic resin film is used as an air permeation preventive layer. Provided is the manufacturing process suitable for a heavy-duty pneumatic tire in particular. The process of manufacturing a pneumatic tire includes: covering the making drum 20 with a cylindrical thermoplastic resin film 6; winding an uncured rubber sheet member 7 as a tie rubber around the thermoplastic resin film 6; and winding a carcass layer 5 around the rubber sheet member 7. The process is characterized in that the rubber sheet member 7 is wound in the circumferential direction of the tire at least twice.

Abstract: A run-flat tire with an aspect ratio of 50% to 60%, which comprises a carcass consisting of a single ply of cords extending between bead cores through a tread portion and sidewall portions, a pair of sidewall reinforcing layers each with a crescent cross-sectional shape and disposed axially inwardly of the carcass in each sidewall portion, the sidewall reinforcing layers made of rubber having a complex elastic modulus of from 6 to 12 MPa, and a pair of bead apex elements which extending radially outwardly of the tire from bead cores, each bead apex element having a height of from 0.30 to 0.48 times a tire section height from a bead base-line, wherein the tire has certain relations with respect to thicknesses of sidewall reinforcing layers and sidewall rubber elements.

Abstract: The present invention relates to a radial tire for a heavy load comprising a bead core, a carcass ply layer, an inner liner A layer, a belt and a tread, wherein the following relational equation (I): P/G?1.00??(I) and relational equation (II): D?6.0??(II) are satisfied at the same time, and the radial tire for a heavy load which is improved in a low fuel consumption and in which a tire durability is consistent with a reduction in a weigh can be provided.

Abstract: Embodiments include inflatable articles that include an interior surface adapted for being in contact with the inflation gas, the interior surface coated with a parylene barrier. The parylene barrier may be formed of parylene N, parylene C, parylene D, another substituted parylene or combinations thereof. In particular embodiments, the inflatable article is a tire. Other embodiments include inflatable articles having composite layers, wherein at least two of the composite layers include surfaces that interface with one another and a parylene coating applied to at least one of the interfacing surfaces.

Abstract: An object of the present invention is to provide a polymer laminate that has a small thickness and is excellent in air permeation resistance and adhesion with an adjacent rubber, and a pneumatic tire using the same as an inner liner. A polymer laminate includes a first layer having a thickness of 0.05 mm to 0.6 mm made of a styrene-isobutylene-styrene triblock copolymer, and a second layer containing at least one of a styrene-isoprene-styrene triblock copolymer and a styrene-isobutylene diblock copolymer, and a second layer have a thickness of 0.01 mm to 0.3 mm.

Abstract: An inflatable article such as a pneumatic tire provided with a puncture-resistant layer comprising, by way of a self-sealing composition, an elastomer composition comprising at least, as predominant elastomer, a thermoplastic styrene (TPS) elastomer, more than 200 phr of an extender oil and more than 20 phr of a hydrocarbon resin, the glass transition temperature of which is greater than 0° C. The puncture-resistant layer is advantageously combined with an airtight layer, for example based on butyl rubber, so as to form, in the pneumatic article, an airtight puncture-resistant laminate.

Abstract: A vulcanizable layered composition comprising at least two layers and at least one tie layer, wherein the first layer of the two layers is a fluid permeation prevention layer preferably comprising: (A) at least one thermoplastic engineering component and (B) at least one elastomer component; the second layer of the two layers comprises at least one high diene rubber and the tie layer comprises a mixture of: (1) at least one halogenated isobutylene containing elastomer; (2) up to 50 weight % of at least one high diene elastomer; (3) at least one filler; (4) up to 30 weight % of at least one processing oil; (5) at least one tackifier; and (6) a curing system for the elastomers.

Abstract: The present invention is directed to a pneumatic tire having a built-in seamless polyurethane sealant layer and its preparation.

Abstract: An inflatable article is provided with a layer impermeable to inflation gases. The layer has an elastomer composition that includes at least, as a predominant elastomer by weight, a thermoplastic styrene (TPS) elastomer and a platy filler. The platy filler has an equivalent diameter (Dv (0.5)) of between 20 and 45 micrometers, and has a shape factor (F) greater than 65.

Abstract: The present invention is generally directed to pneumatic tires having a pre-formed multi-layered air barrier layer innerliner.

Abstract: A pneumatic tire which uses, as an inner liner layer, a laminated sheet obtained by laminating an air permeation preventing layer, made of any one of a thermoplastic resin and a thermoplastic elastomer composition containing a blend of the thermoplastic resin and an elastomer, and a tie rubber layer, and which has high durability to prevent development of a crack in the tie rubber layer that occurs around a splice portion of the laminated sheet after the tire starts to be used. In the pneumatic tire, a sagged portion is formed by a concavo-convex structure in the air permeation preventing layer at least between points P and Q in a shape that a length La of a straight line connecting points P and Q and a length Lb of the air permeation preventing layer actually passing through points P and Q satisfy a relationship of (1.03×La)?Lb?(1.5×La).

Abstract: A method for simulating the behavior of a tire mounted on a vehicle in running conditions on the ground, wherein a mechanical model is provided for essentially computing the longitudinal (Fx) and transverse (Fy) stresses transmitted by the tire between the ground and the vehicle in accordance with dynamic parameters related to the physical conditions of the tire running and use and in accordance with physical tire-specific parameters. The mechanical model is set and solved in an iterative manner, under the assumption that the tire in contact with the surface of the ground has an adherence contact area and a sliding contact area and under the assumption that there is a unique x-coordinate point b that is indicative of the transition between the two contact areas.

Abstract: Disclosed is a method for producing a thermoplastic elastomer composition having a phase structure comprising a continuous phase comprising at least one thermoplastic resin and a disperse phase comprising dynamically crosslinked elastomer particles finely dispersed in the continuous phase, the method being characterized by dispersing in at least one crosslinkable elastomer component furnace carbon black having a BET nitrogen adsorption specific surface area of from 100 to 260 m2/g and a primary particle average particle diameter of from 10 to 25 nm in an amount of 1 to 15 parts by weight with respect to 100 parts by weight of the at least one crosslinkable elastomer component, prior to or during dynamic crosslinking.

Abstract: The present invention provides a multi layered air permeation preventive layer of pneumatic tires having ?50 to ?10i É of the steep decreasing range of the elastic modulus includes inner liner layer of a non-drawn film formed from a polymer composition including 60 to 90 wt. % of a thermoplastic resin and 10 to 40 wt. % of an elastomer, and carcass layer coated on the inside and outside of the inner liner layer, the tire thus manufacture has no fracture under a severe deformation during the tire shaping process, facilitating the tire manufacture, and exhibits an air permeation preventive property as an excellent air permeation preventive layer.

Abstract: The present invention relates to a tire containing a layered composite of sealant and air permeation resistant film, particularly a non-elastomeric film.

Abstract: An object of the present invention is, in a thermoplastic elastomer composition in which a modified rubber is dispersed and filled in an ethylene-vinyl alcohol copolymer matrix in order to improve the low-temperature durability of the ethylene-vinyl alcohol copolymer, to reduce the extrusion load during extrusion molding thereof into a film without deteriorating the low-temperature durability. The present invention is a thermoplastic elastomer composition comprising an ethylene-vinyl alcohol copolymer (A) and a modified rubber (B) dispersed in the ethylene-vinyl alcohol copolymer (A), wherein the modified rubber (B) has an acid anhydride group or epoxy group and is dynamically cross-linked by a compound (C) having at least two amino groups. This thermoplastic elastomer composition can be suitably used in the production of an inner liner of a pneumatic tire.

Abstract: A truck/bus tire has an internal surface covered with an air-seal layer that has an end in a region within 120 mm as measured from a toe tip of a bead portion along a bead base line and is configured of a stack of layers of polymers including a first layer of an elastomer composition containing a SIBS and having a thickness of 0.05-0.6 mm and a second layer of an elastomer composition containing at least one of a SIS and a SIB, having a thickness of 0.01-0.3 mm, and positioned adjacent to a carcass ply. The first and second layers have the elastomer compositions with a dynamic modulus of elasticity (E*) of 2-5 MPa. A pneumatic tire can be provided that includes an air-seal layer having limited variation at an internal surface of the tire for enhanced air permeation resistance and increased rolling resistance.

Abstract: A pneumatic tire includes an inner liner disposed inwardly in the tire relative to a carcass ply bridged between a pair of bead portions, the inner liner being formed of a first layer disposed inwardly in the tire, and a second layer disposed in contact with a rubber layer of the carcass ply, the first layer being a thermoplastic elastomer composition mainly containing a styrene-isobutylene-styrene block copolymer, the second layer being a styrene-based thermoplastic elastomer composition, (a) at least one of the thermoplastic elastomer compositions of the first and second layers containing a tackifier by 0.1 part by mass to 100 parts by mass relative to 100 parts by mass of a thermoplastic elastomer component, or (b) the second layer containing the styrene-isobutylene-styrene block copolymer by 10 mass % to 80 mass % relative to a thermoplastic elastomer component thereof.

Abstract: The present invention relates to a film for a tire inner liner, particularly to a film for a tire inner liner including: a base film including a copolymer or a mixture of polyamide-based resin and a polyether-based resin; and an adhesive layer including a resorcinol-formalin-latex (RFL)-based adhesive, wherein the base film has a tensile recovery rate of 30% to 80%. The film for a tire inner liner of the present invention may exhibit an excellent gas barrier property with a thin thickness, and thus enables light weight of a tire and improvement in automobile mileage, and enables easier forming during a tire manufacturing process.

Abstract: The present invention relates to a film for a tire inner liner including: a base film layer including polyamide-based resin and a copolymer including a polyamide-based segment and a polyether-based segment; and an adhesive layer including a resorcinol-formalin-latex (RFL)-based adhesive, wherein there is little difference between properties in an MD (machine direction) and a TD (transverse direction), and a method for preparing a film for a tire inner liner, including melting the polyamide-based resin and the copolymer at 230 to 300° C., extruding the molten substance under specific die gap conditions to form a base film, and forming an adhesive layer including a resorcinol-formalin-latex (RFL)-based adhesive on the base film.

Abstract: Disclosed is a film for a tire inner liner including a base film layer having an absolute weight-average molecular weight of 50,000 to 1,000,000, and an adhesive layer, and a method for manufacturing the film for a tire inner liner. The film for a tire inner liner may exhibit excellent gas barrier properties while having a thin thickness and lighter weight, and thus improves fuel efficiency, allows easier construction during its preparation, has excellent mechanical properties including high durability and fatigue resistance, and provides excellent adhesive strength to a tire carcass layer.

Abstract: A barrier layer for impeding the flow of inflation gas through an inflatable article, the barrier layer constructed of a material that is based upon a cross-linkable rubber composition, the cross-linkable rubber composition comprising, per 100 parts by weight of rubber (pbr) at least 50 phr of a primary elastomer selected from at least one of a halogenated butyl rubber or a polymeric halogenated rubber comprising C4 to C7 isooleiln derived units, para-alkylstyrene derived units and para-(haloalkylstyrene) derived units. The rubber composition may further include between 0 phr and 50 phr of a secondary diene elastomer and a platy filler. Additionally the rubber composition includes 1,3-phenylene dimaleimide and is cured with a sulfur curing system, which includes an accelerator.

Abstract: A multilayered structure having a layer A constituted with a resin composition containing a gas barrier resin, and a layer B being adjacent to the layer A and being constituted with a resin composition containing an elastomer. The total number of the layer A and the layer B is at least 7. The average thickness of the layer A in terms of a single layer is no less than 0.001 ?m and no greater than 10 ?m, and the average thickness of the layer B in terms of a single layer is no less than 0.001 ?m and no greater than 40 ?m. The multilayered structure is formed by irradiating with an active energy ray. Furthermore, an inner liner having the multilayered structure, and a pneumatic tire provided with the inner liner are provided.

Abstract: A barrier layer is provided for impeding the flow of inflation gas through an inflatable article, the barrier layer constructed of a material that is based upon a cross-linkable rubber composition, the cross-linkable rubber composition comprising, per 100 parts by weight of rubber (phr), between 50 phr and 90 phr of a butyl rubber and between 10 phr and 50 phr of a total amount of a GCO copolymer comprising epichlorohydrin derived units and allyl glycidyl ether derived units and a GECO terpolymer comprising epichlorohydrin derived units, allyl glycidyl ether derived units and ethylene oxide derived units, wherein the GECO terpolymer is between 1 percent by weight and 50 percent by weight of the total and also including a sulfur cure system.

Abstract: A pneumatic tire and a method of making a tire are provided. The tire includes a tire tread, a tire layer, and a barrier layer. The tire layer is circumferentially disposed inwardly of the tire tread and includes a first end and a second end situated adjacent each other to define a butt joint. The barrier layer includes a first end and a second end, a portion of the first end of the barrier layer overlaps the second end by about 1.5 cm or more to define a lap joint, and where the first end of the barrier layer is received between and extends beyond the butt joint such that the first end of the tire layer is sandwiched between the lap joint.

Abstract: Provided is a pneumatic tire and a manufacturing method therefor which allow a reduction in a cavity resonance sound without complicated manufacturing steps. A pneumatic tire of the present invention includes: a pair of bead portions; a carcass layer bridged between the pair of bead portions; and an inner liner layer disposed at a tire inner surface side of the carcass layer, the inner liner layer being made of a thermoplastic resin or a thermoplastic elastomer composition obtained by blending a thermoplastic resin with an elastomer. The inner liner layer has a laminated structure including multiple film layers having different melting points of the thermoplastic resin from each other. The film layer having the lowest melting point of the thermoplastic resin is foamed to form multiple convex portions in the tire inner surface.

Abstract: A laminate comprising at least one layer of a first thermoplastic resin composition alternately stacked with at least two layers of a second thermoplastic resin composition, so that the outermost layers are the layers of the second thermoplastic resin composition, wherein the first thermoplastic resin composition, comprises at least one selected from the group consisting of ethylene-vinyl alcohol copolymer and modified ethylene-vinyl alcohol copolymers, and the second thermoplastic resin composition has a different composition from the first thermoplastic resin composition, and wherein, in any adjacent pair of the layer of the first thermoplastic resin composition and the layer of the second thermoplastic resin composition, the layer of the first thermoplastic resin composition and the layer of the second thermoplastic resin composition have a specific tensile modulus ratio and a specific thickness ratio.

Abstract: A layered structure suitable for use in a pneumatic tire as an innerliner is prepared by directly bonding a fluid permeation prevention film and an adhesive tie layer. Prior to the bonding, the fluid permeation prevention layer is treated to remove any residual plasticizers or oils on the surface of the film. The tie layer comprises 100 weight % of at least one halogenated isobutylene containing elastomer and about 1 to about 20 parts per hundred (phr) of at least one tackifier. The fluid permeation prevention film comprises an elastomeric component dispersed in a vulcanized or partially vulcanized state, as a discontinuous phase, in a matrix of the thermoplastic resin component. The two layers of the layered structure may be separately extruded and then adhered to each other or adhered to each other during a calendaring operation wherein the adhesive tie layer composition is coated onto the treated film.

Abstract: The present invention is directed to a pneumatic tire comprising a carcass and an innerliner in direct contact with the carcass, the innerliner comprising a rubber composition comprising: at least one elastomer selected from the group consisting of butyl rubber, chlorinated butyl rubber, brominated butyl rubber, synthetic polyisoprene, natural rubber, styrene butadiene rubber, polybutadiene, copolymer of isobutylene and paramethylstyrene, and brominated copolymer of isobutylene and paramethylstyrene; epichlorohydrin rubber; and at least one delaminated talc having a BET surface area according to DIN 66131 of 10-40 m2/g, an average particle size (D50) of 4-8 microns, determined by laser diffraction measurement, and a lamellarity index of 3-15.

Abstract: A method for making a compartmentalized sealant strip and barrier assembly 10 has the steps of co-extruding a barrier strip 9 of non-sealant elastomeric material with a plurality of projecting linear extending walls 9c and a sealant strip 11 wherein the sealant strip 11 is formed on one side of the barrier strip 9 filling the space between the plurality of projecting walls 9c to form a plurality of linearly extending rows of sealant 11 across the transverse width of the co-extrusion to form the compartmentalized sealant strip and barrier assembly 10.

Abstract: Disclosed is a method for producing a thermoplastic elastomer composition having a phase structure comprising a continuous phase comprising at least one thermoplastic resin and a disperse phase comprising dynamically crosslinked elastomer particles finely dispersed in the continuous phase, the method being characterized by dispersing in at least one crosslinkable elastomer component furnace carbon black having a BET nitrogen adsorption specific surface area of from 100 to 260 m2/g and a primary particle average particle diameter of from 10 to 25 nm in an amount of 1 to 15 parts by weight with respect to 100 parts by weight of the at least one crosslinkable elastomer component, prior to or during dynamic crosslinking.

Abstract: It has been discovered that the use of a plasticizer, an ester of a cyclohexanepolycarboxylic acid, especially a 1,2-cyclohexanedicarboxylic acid ester, that is environmentally non-toxic, can replace environmentally unfriendly phthalate plasticizers, such as dioctyl phthalates used in vulcanizable rubber compositions, especially for tires, on a one to one weight basis (phr) without sacrificing beneficial rubber properties.

Abstract: An object of the present invention is, in a thermoplastic elastomer composition in which a modified rubber is filled and dispersed in a polyamide resin matrix in order to improve the low-temperature durability of the polyamide resin, to reduce the extrusion load during extrusion molding thereof into a film without deteriorating the low-temperature durability. The present invention is a thermoplastic elastomer composition (E) comprising a modified polyamide resin (C) and a modified rubber (D) dispersed in the modified polyamide resin (C), the modified polyamide resin (C) being a resin obtained by melt-blending an polyamide resin (A) and a compound (B) capable of reacting with a terminal amino group of a polyamide resin, wherein the modified rubber (D) has an acid anhydride group or epoxy group and is dynamically cross-linked by a compound (F) having at least one disulfide bond and at least two amino groups.

Abstract: The present invention relates to a radial tire for a heavy load comprising a bead core, a carcass ply layer, an inner liner A layer, a belt and a tread, wherein the following relational equation (I): P/G?1.00??(I) and relational equation (II): D?6.0??(II) are satisfied at the same time, and the radial tire for a heavy load which is improved in a low fuel consumption and in which a tire durability is consistent with a reduction in a weigh can be provided.

Abstract: A pneumatic tire in which the average peel strength between the surface of (A) a layer of a single-layered or multi-layered film of a thermoplastic resin and (B) a rubbery elastic layer, which are used as the inner liner layer, is 6 kN/m or greater at ?20° C., i.e., a pneumatic tire exhibiting excellent average peel strength between the surface of layer (A) and layer (B), which are used in combination as the inner liner layer exhibiting excellent gas barrier property and flexibility, at a low temperature and at the room temperature, is provided.

Abstract: Provided are a pneumatic tire and a manufacturing method of the same capable of improving a separation failure at end portions of an inner liner layer made of either a thermoplastic resin or a thermoplastic elastomer composition. The pneumatic tire includes an inner liner layer made of either a thermoplastic resin or a thermoplastic elastomer composition obtained by blending a thermoplastic resin component and an elastomer component. The inner liner layer is provided on an inner side of the tire so as to face a tire cavity. A recessed portion is formed in an internal surface area of the tire where an end portion of the inner liner layer is located.

Abstract: A pneumatic tire in which, in employing as an air-impermeable layer a film formed of a thermoplastic resin or a thermoplastic elastomer component obtained by blending a thermoplastic resin with an elastomer, separation of the film during tire production is prevented; and a process for producing the same. The pneumatic tire is obtained by disposing a film closer to a tire cavity than a carcass layer, disposing a first rubber layer closer to the tire cavity than the film so as to cover the film, and disposing ends, in the width direction, of the first rubber layer outward of ends, in the width direction, of the film, the film being formed of a thermoplastic resin or a thermoplastic elastomer composition obtained by blending a thermoplastic resin with an elastomer.

Abstract: A method of producing impermeable rubber layers, the method including:—a step of preparing a water-based emulsion having at least a cross-linkable polymer base, and a surface-active agent of molecular formula (I) (R1CONR2CHR3—COO?)nXn+ where: R1 is an aliphatic group C6-C23, R2 is H or an aliphatic group C1-C8, R3 is H or an aliphatic or aromatic group C1-C8, X is a metal cation, preferably an alkaline cation, and n is an integer of 1 to 3; and—a step of depositing the water-based emulsion on a surface.

Abstract: This disclosure relates to a vulcanizable layered composition comprising at least two layers and at least one tie layer. The first of the two layers comprises a fluid permeation prevention layer and the second comprises at least one high diene rubber. The tie layer comprises, a mixture, in parts by weight relative to 100 weight parts of rubber, of suitable amounts of: (1) epoxidized natural rubber; (2) at least one high diene elastomer; (3) at least one filler; (4) least one tackifier; and (5) a rubber curing system. The fluid permeation prevention layer preferably comprises suitable amounts of: (A) at least one thermoplastic engineering resin component, preferably one or more nylon resins; and (B) at least one elastomer component, preferably a brominated isobutylene p-methylstyrene copolymer/and where the total amount of (A) and (B) is not less than 30% by weight, and wherein (B) is dispersed in a vulcanized or partially vulcanized state, as a discontinuous phase, in a matrix of component (A).

Abstract: Provided is a method of manufacturing an unvulcanized tire, with which formation of air pockets is reduced in adhering a cylindrical film member and an adhesive sheet member to each other by using a forming drum having an expansion/contraction mechanism. In the method, a forming device having a forming drum (1) which has an expandable/contractible outer diameter and a forming roller (2) disposed in parallel to the forming drum (1) is used; a cylindrical film member (3) is wound around the forming drum (1) and the forming roller (2); thereafter, the diameter of the forming drum (1) is expanded whereby the cylindrical film member (3) is tensioned so as to be in close contact with the forming drum (1); and subsequently, an adhesive sheet member (4) is supplied and adhered to an outer peripheral surface of the cylindrical film member (3) on the forming roller (2), while the cylindrical film member (3) is being moved in a circumferential direction by rotating the forming drum (1).

Abstract: The present invention is generally directed to pneumatic tires having a pre-formed multi-layered air barrier layer innerliner.

Abstract: A pneumatic tire comprising an air permeation preventive layer comprising a film of a thermoplastic resin composition containing a polyvinyl alcohol or ethylene vinyl alcohol copolymer, to which a protective film of a rubber composition containing an ethylene propylene rubber (EPM) or ethylene propylene diene rubber (EPDM) is, directly or via an adhesive, placed adjacent thereto, as one layer in at least one side thereof, whereby both a further reduction in the air leakage rate of the pneumatic tire and a good durability can be achieved and furthermore a reduction in the weight of the tire can be achieved.

Abstract: When forming a rubber member which is made up of a combination of a plurality of rubber compounds by winding spirally a ribbon-shaped unvulcanized rubber strip material in an overlapping fashion, the number of times of winding is reduced so as to shorten a fabrication cycle time of the rubber member to thereby increase the productivity thereof. As a means therefore, a rubber strip material whose cross section is divided into two or more regions which are made up of different rubber compounds is wound spirally on to a drum in an overlapping fashion so as to build a green tire or a tire rubber member.