Abstract: The present technology provides a method of manufacturing a pneumatic tire. The method of manufacturing a pneumatic tire uses a laminated sheet having a predetermined length and an inner liner layer formed from the laminated sheet through a step of cure-molding the tire with end portions of the laminated sheet lap-spliced. In the method, when at least the sheet made of thermoplastic resin or a thermoplastic resin composition obtained by blending the thermoplastic resin and the elastomer is cut into the predetermined length, the cutting is performed by using an edge tool having a non-sharp edge under a temperature condition not lower than 60° C. and not higher than a melting point of the thermoplastic resin.

Abstract: A method for manufacturing a pneumatic tire may include lap-splicing end parts of a laminate sheet in which a sheet obtained from a thermoplastic resin or a thermoplastic resin composition of a thermoplastic resin blended with an elastomer is laminated with a rubber that undergoes vulcanizing adhesion with the thermoplastic resin or the thermoplastic resin composition. After the sheet obtained from the thermoplastic resin or the thermoplastic resin composition is cut into lengths to be supplied for lap-splicing, and at a stage before tire vulcanization molding, distal end parts of the sheet obtained from the thermoplastic resin or the thermoplastic resin composition are sharpened with a thermal treatment.

Abstract: The present technology provides a pneumatic tire having an inner liner comprising a film, which comprises thermoplastic resin or the thermoplastic resin composition of a thermoplastic resin blended with an elastomer, wherein a portion of the inner liner positioned in a region between bead filler tops at left and right sides, having a surface area less than 40% of a total surface area of the region is formed having a thickness of the inner liner thinner than a thickness of the other portion in the region.

Abstract: The present technology provides a tire manufacturing method comprising: positioning a cutting edge cradle on an elastomer layer side of the sheet laminate; pressing a circular blade, which dependently rotates from the sheet side of the sheet laminate comprising a thermoplastic resin or a thermoplastic resin composition, against the sheet laminate placed on the cutting edge cradle so as to cut the sheet laminate; and forming end sections of the sheet laminates to be superimposed.

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 pneumatic tire includes an overlap splice portion formed by laminating a sheet obtained from a thermoplastic resin or a thermoplastic resin composition of a thermoplastic resin blended with an elastomer above and below an interposed rubber layer that undergoes vulcanizing adhesion with the thermoplastic resin or the thermoplastic resin composition. The sheet obtained from the thermoplastic resin or the thermoplastic resin composition of a thermoplastic resin blended with an elastomer that is employed has a plurality of notches having a notch width greater than 1.0 mm provided in a leading edge portion or a vicinity of the leading edge portion of at least one side of the sheet.

Abstract: The present technology provides a method of manufacturing a pneumatic tire. The method of manufacturing a pneumatic tire uses a laminated sheet having a predetermined length and an inner liner layer formed from the laminated sheet through a step of cure-molding the tire with end portions of the laminated sheet lap-spliced. In the method, when at least the sheet made of thermoplastic resin or a thermoplastic resin composition obtained by blending the thermoplastic resin and the elastomer is cut into the predetermined length, the cutting is performed by using an edge tool having a non-sharp edge under a temperature condition not lower than 60° C. and not higher than a melting point of the thermoplastic resin.

Abstract: A pneumatic tire has an overlap splice portion formed by laminating a sheet obtained from a thermoplastic resin or a thermoplastic resin composition of a thermoplastic resin blended with an elastomer above and below an interposed rubber layer that undergoes vulcanizing adhesion with the thermoplastic resin or the thermoplastic resin composition. The sheet obtained from the thermoplastic resin or the thermoplastic resin composition of a thermoplastic resin blended with an elastomer has a plurality of slits extending in a direction having a tire circumferential direction component and having a slit width of not greater than 1.0 mm provided in a leading edge portion or in the vicinity of a leading edge portion of at least one side of the sheet.

Abstract: A pneumatic tire is formed by winding a sheet member (A) and a sheet member (B) onto a molding drum and molding a cylindrical body. A laminate body (M) in which the sheet member (B) is layered in advance on the outer periphery of the sheet member (A) is wound onto a molding drum (10), the tack value of a material (a) constituting the sheet member (A) being smaller than the tack value of a material (b) constituting the sheet member (B), the length of the sheet member (A) being configured so that a starting end (As) of winding on the molding drum (10) and an ending end (Ae) of winding do not overlap, and the length of the sheet member (B) being configured so that the ending end (Be) of winding extends longer in the circumferential direction than the ending end (Ae) of winding of the sheet member (A).

Abstract: A pneumatic tire according has an inner liner layer formed with an overlap splice at the end portions in the tire circumferential direction of a laminated sheet in which a film whose main component is thermoplastic resin and tie rubber are laminated, wherein a laminated sheet with at least one of the end portions in the tire circumferential direction having an edge line formed from straight lines continuously in the tire width direction exhibiting a zigzag shape of a triangular wave form is used as the overlap spliced laminated sheet.

Abstract: A pneumatic tire of the present technology includes a surface on a tire cavity side of a film positioned on a tire cavity side in the overlap splice portion is formed with a recess so that a film thickness at the overlap splice portion becomes thinner than a film thickness of portions other than the overlap splice portion. A surface on a tire outer circumferential side of the film is positioned on the tire cavity side in the overlap splice portion is formed flat between the overlap splice portion and the portions other than the overlap splice portion. A surface on a tire cavity side and a surface on a tire outer circumferential side of a film positioned on a tire outer circumferential side in the overlap splice portion are formed flat between the overlap splice portion and the portions other than the overlap splice portion.

Abstract: The pneumatic tire of the present technology has an overlap splice portion joined by overlapping resin film sheet materials on each other, wherein at least one layer of two layers joined by overlapping the film sheet materials in the overlap splice portion has recessed portions of a depth that is smaller than a thickness of the film sheet material on a non-joining surface side thereof, and joining surface sides of the two layers are formed into flat surfaces and the flat surfaces are joined.

Abstract: A method for manufacturing a pneumatic tire may include lap-splicing end parts of a laminate sheet in which a sheet obtained from a thermoplastic resin or a thermoplastic resin composition of a thermoplastic resin blended with an elastomer is laminated with a rubber that undergoes vulcanizing adhesion with the thermoplastic resin or the thermoplastic resin composition. After the sheet obtained from the thermoplastic resin or the thermoplastic resin composition is cut into lengths to be supplied for lap-splicing, and at a stage before tire vulcanization molding, distal end parts of the sheet obtained from the thermoplastic resin or the thermoplastic resin composition are sharpened with a thermal treatment.

Abstract: A pneumatic tire uses, as an inner liner layer, a laminated sheet obtained by laminating a tie rubber layer and 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 has excellent durability making it possible to prevent the tie rubber layer from being cracked around a splice portion of the laminated sheet after the tire starts to be used. The pneumatic tire also can include, in addition to the laminated sheet, a perforated portion penetrating the air permeation preventing layer that is formed within a range of 25 mm, on at least either side in a tire circumferential direction, from a cavity-side end A of a splice portion of the air permeation preventing layer.

Abstract: A method of manufacturing a pneumatic tire having high durability, in which when a tire is manufactured, including: cutting at a predetermined length a laminated sheet obtained by laminating a sheet of a thermoplastic resin composition obtained by blending a thermoplastic resin and an elastomer, and rubber to be cured and adhered to the thermoplastic resin composition; lap splicing end portions of the laminated sheet; and cure-molding the laminated sheet, such that delamination does not occur between the sheet of the thermoplastic resin composition and the tie rubber sheet cured and adhered to the sheet of the thermoplastic resin composition, which collectively constitute the inner liner layer. In this method cure-molding the laminated sheet can form an inner liner layer, and the cutting can be effected by thermal cutting at a temperature equal to or higher than a melting point of the thermoplastic resin.

Abstract: A pneumatic tire includes an inner liner layer formed from a laminate sheet obtained by laminating: a sheet made from a thermoplastic resin or a thermoplastic resin composition which is a blend of the thermoplastic resin and an elastomer; and a rubber bonded by curing to the thermoplastic resin or the thermoplastic resin composition. The pneumatic tire avoids occurrence of cracks near a splice portion of the inner liner layer after the pneumatic tire starts to be used for driving, and thereby achieves excellent durability. In the tire, an inner liner layer is formed by lap-splicing end portions of a laminate sheet which is obtained by the laminating A sheet with end portions each having a tip subjected to a tip sharpening process is used as the sheet made from the thermoplastic resin or the thermoplastic resin composition which is the blend of the thermoplastic resin and the elastomer.

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: Provided is a non-pneumatic tire in which buckling can be prevented without a weight increase, the non-pneumatic tire including a spoke structure. The spoke structure is obtained by circumferentially arranging spokes intermittently at intervals and coupling together annular cylindrical outer member and cylindrical inner. The spoke structure is joined to an inner peripheral side of a tread ring. At least some of a plurality of spaces formed between two spokes adjacent to each other in the tire circumferential direction have an air-containing structure.

Abstract: A method for measuring deformation of a tire tread is provided. The method uses a tire tread deformation producing system 10 including a flat, transparent base plate 24 having first and second opposite surfaces 24a and 24b. The method also uses a vision system 12 including a pair of CCD cameras 30-1 and 30-2, which are positioned on the side of the second surface of the base plate. A test tire 14 has a tire tread having tread grooves 16. A portion of the tire tread of the test tire is urged against the first surface of the base plate. The three-dimensional shape of a groove wall surface of a tread groove of the test tire is measured by imaging the tread groove across the base plate by the CCD cameras while the test tire is subject to deformation.

Abstract: A non-pneumatic tire includes a spoke structure that can be easily mounted on a rim of a wheel. Durability is improved by suppressing the buckling of a spoke structure. A non-pneumatic tire includes a spoke structure (5) and a tread ring (11). The spoke structure (5) includes a cylindrical outer member (2) and a cylindrical inner member (3) which are concentrically arranged, and which are connected to each other with a plurality of fins (4, 4?) arranged at intervals in the circumferential direction. The tread ring (11) fits onto the outer periphery of the spoke structure (5). The spoke structure (5) is divided in the tire circumferential direction into at least two circumferential-direction separate structures (511, 521, 531).