# US 2014/0190619 A1 · Strip, method for manufacturing the same, and method for manufacturing pneumatic tire > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0190619 A1 - Document ID: US20140190619A1 - Status: Published application - Kind: A1 - Application number: 14/239,447 - Filed: 2012-07-09 - Published: 2014-07-10 - Earliest claimed: 2011-09-16 - Assignees: Sumitomo Rubber Industries, Ltd. - Inventors: Yoji Imoto; Mutsuki Sugimoto - Web page: https://patentgrep.com/patent/US20140190619A1 ## CPC - B29C 48/0011: {combined with compression moulding} - B29C 48/08: flexible, e.g. films - B29C 48/395: using screws surrounded by a cooperating barrel, e.g. single screw extruders - B29D 30/3021: {by feeding a continuous band and winding it spirally, i.e. the band is fed without relative movement along the drum axis, to form an annular element (winding and joining, spirally in general B29C53/562)} - B32B 3/06: for securing layers together; for attaching the product to another member, e.g. to a support {, or to another product, e.g. groove/tongue, interlocking} - B32B 25/042: {of natural rubber or synthetic rubber} - B60C 1/0008: {Compositions of the inner liner} - B60C 5/14: with impervious liner or coating on the inner wall of the tyre - C08L 53/00: Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers - B29D 2030/0682: {Inner liners} - B60C 2005/145: {made of laminated layers} - Y10T 428/24488: Differential nonuniformity at margin - B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00) - B29D: PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE (making granules B29B9/00; making preforms B29B11/00) - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - B60C: VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract The present invention is a strip of a thermoplastic elastomer composition to be wound spirally on a cylindrical drum to form an inner liner for a tire. The strip is composed of a layer stack of a first layer made of a thermoplastic elastomer composition containing 0.1 part by mass to 50 parts by mass of an organic derivative of clay mineral relative to 100 parts by mass of a styrene-isobutylene-styrene triblock copolymer, and a second layer made of a thermoplastic elastomer composition containing at least one of a styrene-isoprene-styrene triblock copolymer and a styrene-isobutylene diblock copolymer. The strip has a strip main body with a thickness of 0.05 mm to 1.0 mm and ear portions with a thickness thinner than the thickness of the strip main body and a width of 0.5 mm to 5.0 mm disposed on opposite sides thereof. ## Claims ### Claim at position 1 -34. (canceled) ### Claim 35 A strip of a thermoplastic elastomer composition to be wound spirally on a cylindrical drum to form an inner liner for a tire having a shape close to a finished sectional shape, the strip being composed of a layer stack of a first layer made of a thermoplastic elastomer composition containing 0.1 part by mass to 50 parts by mass of an organic derivative of clay mineral relative to 100 parts by mass of an elastomer component made of a styrene-isobutylene-styrene triblock copolymer, and a second layer made of a thermoplastic elastomer composition containing at least one of a styrene-isoprene-styrene triblock copolymer and a styrene-isobutylene diblock copolymer, said strip having a strip main body and ear portions disposed on opposite sides thereof, said strip main body having a thickness of 0.05 mm to 1.0 mm, and said ear portions having a thickness thinner than the thickness of said strip main body and a width of 0.5 mm to 5.0 mm. ### Claim 36 (depends on 35) The strip according to claim 35, wherein said styrene-isobutylene-styrene triblock copolymer has a weight average molecular weight of 50,000 to 400,000 and contains a styrene component at a content of 10 percent by mass to 30 percent by mass. ### Claim 37 (depends on 35) The strip according to claim 35, wherein said styrene-isoprene-styrene triblock copolymer has a weight average molecular weight of 100,000 to 290,000 and contains a styrene component at a content of 10 percent by mass to 30 percent by mass. ### Claim 38 (depends on 35) The strip according to claim 35, wherein said styrene-isobutylene diblock copolymer has a weight average molecular weight of 40,000 to 120,000 and contains a styrene component at a content of 10 percent by mass to 35 percent by mass. ### Claim 39 (depends on 35) The strip according to claim 35, wherein said strip has a width of 5 mm to 40 mm. ### Claim 40 (depends on 35) The strip according to claim 35, wherein the thickness of said ear portions of said strip is 0.02 mm to 0.5 mm. ### Claim 41 (depends on 35) The strip according to claim 35, wherein said first layer has a thickness of 0.05 mm to 0.6 mm, and the second layer has a thickness of 0.01 mm to 0.3 mm. ### Claim 42 A strip of a thermoplastic elastomer composition to be wound spirally on a cylindrical drum to form an inner liner for a tire having a shape close to a finished sectional shape, the strip being composed of a layer stack of a first layer made of a thermoplastic elastomer composition containing 60 percent by mass to 99.9 percent by mass of a styrene-isobutylene-styrene triblock copolymer and 0.5 percent by mass to 40 percent by mass of a styrene-maleic anhydride copolymer, and a second layer made of a thermoplastic elastomer composition containing a styrene-isoprene-styrene triblock copolymer, said strip having a strip main body and ear portions disposed on both sides thereof, said strip main body having a thickness of 0.05 mm to 1.0 mm, and said ear portions having a thickness thinner than the thickness of said strip main body and a width of 0.5 mm to 5.0 mm. ### Claim 43 (depends on 42) The strip according to claim 42, wherein said styrene-isobutylene-styrene triblock copolymer has a weight average molecular weight of 50,000 to 400,000 and contains a styrene component at a content of 10 percent by mass to 30 percent by mass. ### Claim 44 (depends on 42) The strip according to claim 42, wherein said styrene-maleic anhydride copolymer contains a styrene-maleic anhydride copolymer base resin in which a styrene component and a maleic anhydride component have a molar ratio of 50/50 to 90/10, a weight average molecular weight is 4,000 to 20,000, and the maleic anhydride component has an acid value of 50 to 600. ### Claim 45 (depends on 42) The strip according to claim 42, wherein said styrene-maleic anhydride copolymer contains an ester resin of a styrene-maleic anhydride copolymer having a monoester group and a monocarboxylic acid group, said ester resin being obtained by esterification of said styrene-maleic anhydride copolymer base resin. ### Claim 46 (depends on 42) The strip according to claim 42, wherein said styrene-maleic anhydride copolymer contains a styrene-maleic anhydride copolymer ammonium salt aqueous solution which is a solution of an ammonium salt of said styrene-maleic anhydride copolymer base resin. ### Claim 47 (depends on 42) The strip according to claim 42, wherein said strip has a width of 5 mm to 40 mm. ### Claim 48 (depends on 42) The strip according to claim 42, wherein the thickness of said ear portions of said strip is 0.02 mm to 0.5 mm. ### Claim 49 (depends on 42) The strip according to claim 42, wherein said first layer has a thickness of 0.05 mm to 0.6 mm, and said second layer has a thickness of 0.01 mm to 0.3 mm. ### Claim 50 (depends on 35) A method for manufacturing the strip made of a thermoplastic elastomer composition as defined in claim 35, comprising the steps of: (a) extruding a thermoplastic elastomer by an extruder having an extruder main body and an extrusion head to form a sheet having a horizontally long rectangular cross sectional shape; (b) passing the sheet between a pair of die rollers and transferring a shape of the die rollers on said sheet to form the strip having the ear portions on ends thereof; and (c) detaching said strip from the die rollers. ### Claim 51 (depends on 35) A method for manufacturing a pneumatic tire, characterized in that the strip as defined in claim 35 is wound spirally on the cylindrical drum to form the inner liner, and the inner liner is disposed on an inner surface of a raw tire, and then vulcanization is performed. ### Claim 52 A strip of a polymer composition to be wound spirally on a cylindrical drum to form an inner liner for a tire having a shape close to a finished sectional shape, said strip being composed of a layer stack of a first layer of a polymer sheet of a polymer composition containing more than or equal to 0.1 part by mass and less than or equal to 5 parts by mass of sulfur relative to 100 parts by mass of a polymer component containing more than or equal to 5 percent by mass and less than or equal to 40 percent by mass of a styrene-isobutylene-styrene triblock copolymer and more than or equal to 60 percent by mass and less than or equal to 95 percent by mass of at least one kind of rubber component selected from the group consisting of a natural rubber, an isoprene rubber and a butyl rubber, and a second layer made of a thermoplastic elastomer composition, said strip having a strip main body and ear portions disposed on both sides thereof, said strip main body having a thickness of 0.05 mm to 1.0 mm, and said ear portions having a thickness thinner than the thickness of said strip main body and a width of 0.5 mm to 5.0 mm. ### Claim 53 (depends on 52) The strip according to claim 52, wherein said second layer contains a thermoplastic elastomer containing at least one kind selected from the group consisting of a styrene-isoprene-styrene triblock copolymer, a styrene-isobutylene diblock copolymer and an epoxidized styrene-butadiene-styrene triblock copolymer, and at least one kind of rubber component selected from the group consisting of a natural rubber, an isoprene rubber and a butyl rubber, and more than or equal to 20 percent by mass and less than or equal to 90 percent by mass of said rubber component is contained relative to the total of said thermoplastic elastomer and said rubber component. ### Claim 54 (depends on 52) The strip according to claim 52, wherein said strip has a width of 5 mm to 40 mm. ### Claim 55 (depends on 52) The strip according to claim 52, wherein the thickness of said ear portions of said strip is 0.02 mm to 0.5 mm. ### Claim 56 A strip of a thermoplastic elastomer composition to be wound spirally on a cylindrical drum to form an inner liner for a tire having a shape close to a finished sectional shape, the strip being composed of a first layer disposed on the tire inside and a second layer disposed adjacent to a carcass, at least one of said first layer and said second layer being made of an elastomer composition containing, in an elastomer component, more than or equal to 10 percent by mass and less than or equal to 100 percent by mass of an isobutylene-based modified copolymer which is an isobutylene-based block copolymer formed of a polymeric block mainly containing isobutylene and a polymeric block mainly containing an aromatic vinyl-based compound and which contains β-pinene copolymerized in at least one block, said second layer being made of an elastomer composition containing more than or equal to 5 percent by mass and less than or equal to 80 percent by mass of said isobutylene-based modified copolymer and at least one of a styrene-isoprene-styrene block copolymer and a styrene-isobutylene block copolymer, said strip having a strip main body and ear portions disposed on both sides thereof, said strip main body having a thickness of 0.05 mm to 1.0 mm, and said ear portions having a thickness thinner than the thickness of said strip main body and a width of 0.5 mm to 5.0 mm. ### Claim 57 (depends on 56) The strip according to claim 56, characterized in that said isobutylene-based modified copolymer contains β-pinene at a content of 0.5 percent by weight to 25 percent by weight. ### Claim 58 (depends on 56) The strip according to claim 56, characterized in that said isobutylene-based modified copolymer has a weight average molecular weight Mw of 30,000 to 300,000, and a value of a molecular weight distribution (weight average molecular weight Mw/number average molecular weight Mn) is less than or equal to 1.3. ### Claim 59 (depends on 56) The strip according to claim 56, wherein said isobutylene-based modified copolymer contains β-pinene in a styrene block of one of a styrene-isobutylene-styrene block copolymer, a styrene-isoprene-styrene block copolymer and a styrene-isobutylene block copolymer. ### Claim 60 (depends on 56) The strip according to claim 56, wherein said strip has a width of 5 mm to 40 mm. ### Claim 61 (depends on 56) The strip according to claim 56, wherein the thickness of said ear portions of said strip is 0.02 mm to 0.5 mm. ### Claim 62 (depends on 56) A method for manufacturing a pneumatic tire, characterized in that the strip as defined in claim 56 is wound spirally on a cylindrical drum to mold an inner liner having a shape close to a finished sectional shape to be disposed on an inner surface of a raw tire, and the raw tire is vulcanized. ### Claim 63 (depends on 62) The method for manufacturing a pneumatic tire according to claim 62, wherein said strip is manufactured by the steps including (a) extruding a thermoplastic elastomer composition by an extruder having an extruder main body and an extrusion head to form a sheet having a horizontally long rectangular cross sectional shape, (b) passing the sheet between a pair of die rollers and transferring a shape of the die rollers on said sheet to form the strip having the ear portions on ends thereof, and (c) detaching said strip from the die rollers.