WO2014087942A1 - 空気入りタイヤ - Google Patents
空気入りタイヤ Download PDFInfo
- Publication number
- WO2014087942A1 WO2014087942A1 PCT/JP2013/082244 JP2013082244W WO2014087942A1 WO 2014087942 A1 WO2014087942 A1 WO 2014087942A1 JP 2013082244 W JP2013082244 W JP 2013082244W WO 2014087942 A1 WO2014087942 A1 WO 2014087942A1
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- WIPO (PCT)
- Prior art keywords
- thermoplastic resin
- elastomer
- slit
- sheet
- resin composition
- Prior art date
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
- C08L77/06—Polyamides derived from polyamines and polycarboxylic acids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C5/00—Inflatable pneumatic tyres or inner tubes
- B60C5/12—Inflatable pneumatic tyres or inner tubes without separate inflatable inserts, e.g. tubeless tyres with transverse section open to the rim
- B60C5/14—Inflatable pneumatic tyres or inner tubes without separate inflatable inserts, e.g. tubeless tyres with transverse section open to the rim with impervious liner or coating on the inner wall of the tyre
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/0681—Parts of pneumatic tyres; accessories, auxiliary operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/08—Building tyres
- B29D30/20—Building tyres by the flat-tyre method, i.e. building on cylindrical drums
- B29D30/30—Applying the layers; Guiding or stretching the layers during application
- B29D30/3007—Applying the layers; Guiding or stretching the layers during application by feeding a sheet perpendicular to the drum axis and joining the ends to form an annular element
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L47/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds; Compositions of derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
- C08L77/02—Polyamides derived from omega-amino carboxylic acids or from lactams thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/0681—Parts of pneumatic tyres; accessories, auxiliary operations
- B29D2030/0682—Inner liners
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C5/00—Inflatable pneumatic tyres or inner tubes
- B60C5/12—Inflatable pneumatic tyres or inner tubes without separate inflatable inserts, e.g. tubeless tyres with transverse section open to the rim
- B60C5/14—Inflatable pneumatic tyres or inner tubes without separate inflatable inserts, e.g. tubeless tyres with transverse section open to the rim with impervious liner or coating on the inner wall of the tyre
- B60C2005/145—Inflatable pneumatic tyres or inner tubes without separate inflatable inserts, e.g. tubeless tyres with transverse section open to the rim with impervious liner or coating on the inner wall of the tyre made of laminated layers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C5/00—Inflatable pneumatic tyres or inner tubes
- B60C5/12—Inflatable pneumatic tyres or inner tubes without separate inflatable inserts, e.g. tubeless tyres with transverse section open to the rim
- B60C5/14—Inflatable pneumatic tyres or inner tubes without separate inflatable inserts, e.g. tubeless tyres with transverse section open to the rim with impervious liner or coating on the inner wall of the tyre
- B60C2005/147—Inflatable pneumatic tyres or inner tubes without separate inflatable inserts, e.g. tubeless tyres with transverse section open to the rim with impervious liner or coating on the inner wall of the tyre characterised by the joint or splice
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/04—Thermoplastic elastomer
Definitions
- the present invention relates to a pneumatic tire.
- thermoplastic resin or thermoplastic resin composition obtained by blending a thermoplastic resin and an elastomer is interposed between the thermoplastic resin or a rubber layer that is vulcanized and bonded to the thermoplastic resin composition.
- Patent Document 1 a sheet-like material made of a thermoplastic resin or a thermoplastic resin composition obtained by blending a thermoplastic resin and an elastomer is used for an inner liner of a pneumatic tire.
- thermoplastic resin or the thermoplastic resin and the elastomer are usually used.
- a laminate sheet of a rubber (tie rubber) sheet that is vulcanized and bonded to the thermoplastic resin or a thermoplastic resin composition blended with a thermoplastic resin and an elastomer.
- a manufacturing method is adopted in which the product is wound around a molding drum, lap spliced, and used for a tire vulcanization molding process.
- a laminate sheet comprising a thermoplastic resin composition or a thermoplastic resin composition in which a thermoplastic resin and an elastomer are blended and a tie rubber layer wound in a roll form is required from the roll form.
- the inner liner is configured.
- the thermoplastic resin or the thermoplastic resin composition sheet and the thermoplastic resin or thermoplastic resin composition sheet and the vulcanized and bonded tie rubber sheet peel off.
- a laminate sheet 1 comprising a sheet 2 made of a thermoplastic resin or a thermoplastic resin composition obtained by blending a thermoplastic resin and an elastomer, and a tie rubber layer 3 is used. Is cut into a required size (length) with a blade or the like, and is spliced on the tire forming drum so as to form an annular shape by providing overlap splice portions S at both ends thereof.
- the laminate sheet 1 is formed so that both ends thereof are spliced to form an annular shape when one sheet is used, or the mutual ends are spliced together when a plurality of sheets are used. It is formed so as to form an annular shape.
- a part material (not shown) necessary for manufacturing the tire is wound and vulcanized with a bladder.
- an inner liner layer comprising a sheet 2 of a thermoplastic resin composition obtained by blending a thermoplastic resin or a thermoplastic resin and an elastomer, and a tie rubber layer 3 10 is formed, and in the vicinity of the overlap splice portion S, the exposed portion of the sheet 2 made of the thermoplastic resin or the thermoplastic resin composition described above and the portion embedded in the tie rubber layer are formed. ing.
- thermoplastic resin composition obtained by blending a thermoplastic resin and an elastomer with two layers above and below with a tie rubber layer 3 'interposed therebetween.
- the upper side is the tire lumen side in the drawings, and the sheet 2 made of the thermoplastic resin composition is arranged on the tire lumen side. Green tires are manufactured.
- thermoplastic resin or thermoplastic resin composition sheet 2 and the vulcanized and bonded tie rubber sheet 3 are peeled off after the start of use of the tire is particularly shown in FIG.
- the sheet 2 of the thermoplastic resin or thermoplastic resin composition exposed is generated in the vicinity of the tip 4 of the sheet, cracks are first generated, and further progresses to the sheet peeling phenomenon. .
- thermoplastic resin or the thermoplastic resin composition sheet 2 generally has a higher modulus in the low elongation region than the rubber compound, and in particular, the tie rubber sheet is sandwiched between the splice portion S and 2 as described above. Due to the presence of the layer, the rigidity of the splice part becomes higher than that of other parts, and stress concentrates in the vicinity of the splice part due to the difference in rigidity, so that the sheet 2 of thermoplastic resin or thermoplastic resin composition It is understood that cracks, delamination, breakage, and the like occur due to shear strain generated in the plane.
- an object of the present invention is to provide a sheet comprising a thermoplastic resin or a thermoplastic resin composition obtained by blending a thermoplastic resin and an elastomer, and vulcanizing the thermoplastic resin or the thermoplastic resin composition.
- a pneumatic tire having an overlap splice portion formed by laminating a rubber layer to be bonded and laminated on the upper and lower sides of the rubber layer after the pneumatic tire starts running, the overlap splice portion
- An object of the present invention is to provide a pneumatic tire excellent in durability without causing cracks or peeling of a sheet made of a thermoplastic resin composition in which the thermoplastic resin or a thermoplastic resin and an elastomer are blended in the vicinity. To do.
- the pneumatic tire of the present invention that achieves the above-described object has the following configuration (1).
- a sheet comprising a thermoplastic resin or a thermoplastic resin composition obtained by blending a thermoplastic resin and an elastomer, with the rubber layer vulcanized and bonded to the thermoplastic resin or the thermoplastic resin composition interposed therebetween, and the rubber
- a pneumatic tire having an overlap splice portion formed by laminating above and below a layer, at least one side of the sheet as a sheet comprising the thermoplastic resin or a thermoplastic resin composition blended with a thermoplastic resin and an elastomer
- a pneumatic tire comprising a plurality of slits extending in a direction having a tire width direction component and having a slit width of 1.0 mm or less at or near the tip of the pneumatic tire .
- the pneumatic tire of the present invention preferably has any one of the following configurations (2) to (10).
- (3) The length of the slit is 0.2 times or more and 1.5 times or less of the overlap length of the overlap splice part as the length of the tire circumferential direction component.
- the length of the slit is 0.4 times or more and 1.0 or less times as long as an overlap length of the overlap splice portion as a length of a tire circumferential direction component.
- the slit is provided so as to exhibit a slit angle of 30 ° to 90 ° with respect to the line direction of the front end portion of the sheet made of the thermoplastic resin or a thermoplastic resin composition obtained by blending a thermoplastic resin and an elastomer.
- the pneumatic tire as described in any one of (1) to (4) above, wherein (6) The slit is provided in a sheet made of the thermoplastic resin or a thermoplastic resin composition obtained by blending an elastomer and an elastomer arranged on the tire lumen side in the overlap splice portion.
- the pneumatic tire according to any one of the above (1) to (5) which is characterized in that (7) A tip portion of a sheet made of a thermoplastic resin composition obtained by blending the thermoplastic resin or a thermoplastic resin and an elastomer in the overlap splice portion is subjected to a tip sharpening treatment.
- the tip sharpening treatment enters from the tip of a sheet made of the thermoplastic resin or a thermoplastic resin composition in which an elastomer is blended into the thermoplastic resin, to the inside by (t ⁇ 1/3) length.
- the pneumatic tire according to the above (7), wherein the thickness T ( ⁇ m) has a relationship satisfying 0.1t ⁇ T ⁇ 0.8t.
- t average thickness ( ⁇ m) in the tire circumferential direction of the non-tip sharpened portion of the sheet made of a thermoplastic resin or a thermoplastic resin composition obtained by blending an elastomer in a thermoplastic resin
- T Thickness of the sheet 2 at a position (t ⁇ 1/3) inside from the front end of the sheet made of a thermoplastic resin or a thermoplastic resin composition in which an elastomer is blended in a thermoplastic resin (t ⁇ 1/3) ⁇ m) (9)
- the pneumatic tire as described in any one of (1) to (8) above, wherein both side walls of the slit are subjected to sharpening of the tip.
- the thickness T ( ⁇ m) has a relationship satisfying 0.1t ⁇ T ⁇ 0.8t at a position inward by (t ⁇ 1/3) length in the perpendicular direction.
- t average thickness ( ⁇ m) in the tire circumferential direction of the non-tip sharpened portion of the sheet made of a thermoplastic resin or a thermoplastic resin composition obtained by blending an elastomer in a thermoplastic resin
- T From the front end of the slit side wall of the sheet made of a thermoplastic resin or a thermoplastic resin composition in which an elastomer is blended in a thermoplastic resin, enters the inside in the direction perpendicular to the side wall of the slit (t ⁇ 1/3). Thickness of sheet 2 at different positions ( ⁇ m)
- a sheet made of a thermoplastic resin or a thermoplastic resin composition obtained by blending a thermoplastic resin and an elastomer is added to the thermoplastic resin or the thermoplastic resin composition.
- FIG. 1 is a schematic view of an essential part showing an embodiment of a pneumatic tire according to the present invention.
- FIG. 1 (a) is a plan view in the vicinity of an overlap splice S
- FIG. 1C is a cross-sectional view of the vicinity of the lap splice portion S
- FIG. 1C shows another embodiment of the pneumatic tire of the present invention.
- FIG. 2 is a schematic view of a main part showing an embodiment of the pneumatic tire of the present invention, and is a plan view in the vicinity of the overlap splice part S.
- FIG. 3 is a main part schematic view showing an embodiment of the pneumatic tire of the present invention, and is a plan view in the vicinity of the overlap splice part S.
- FIG. 1 is a schematic view of an essential part showing an embodiment of a pneumatic tire according to the present invention.
- FIG. 1 (a) is a plan view in the vicinity of an overlap splice S
- FIG. 1C is a cross-sectional view
- FIG. 4 is a main part schematic diagram showing an example of an embodiment of the pneumatic tire of the present invention, and is an explanatory view of the sharpened tip portion of the sheet 2 in the vicinity of the overlap splice part S.
- FIGS. 5 (a) to 5 (c) are for explaining the problems of the prior art.
- FIG. 5 (a) shows a sheet 2 made of a thermoplastic resin or a thermoplastic resin composition, and the thermoplastic resin.
- FIG. 5 (a) shows a sheet 2 made of a thermoplastic resin or a thermoplastic resin composition, and the thermoplastic resin.
- FIG. 5B is a model diagram showing a state after vulcanization molding in the state shown in FIG.
- FIG. 5C is a plan view of the vicinity of the splice portion.
- FIG. 6 is a partially broken perspective view showing an example of the form of the pneumatic tire according to the present invention.
- the sheet 2 made of a thermoplastic resin or a thermoplastic resin composition obtained by blending a thermoplastic resin and an elastomer is the thermoplastic resin or the thermoplastic resin composition.
- the thermoplastic resin or the thermoplastic resin and the elastomer As a sheet 2 composed of a blended thermoplastic resin composition, a slit extending in a direction having a slit width of 1.0 mm or less and having a tire circumferential direction component at least at or near the front end of the sheet 2 It is characterized by using what 5 is provided in large numbers.
- the sheet 2 made of the thermoplastic resin or a thermoplastic resin composition obtained by blending a thermoplastic resin and an elastomer described above is used as an inner liner layer (air permeation preventive layer) or a specific portion of the tire in a pneumatic tire. It constitutes a reinforcing sheet for reinforcement.
- the sheet 2 is used in a pneumatic tire as a laminated sheet 1 laminated with rubber such as a tie rubber 3, and in the present invention, the end of the laminated sheet is overlapped. Is formed in the pneumatic tire by forming the aforementioned inner liner or reinforcing sheet.
- the sheet 2 is made of the thermoplastic resin or a thermoplastic resin composition obtained by blending a thermoplastic resin and an elastomer.
- a plurality of slits 5 having a slit width of 1.0 mm or less and extending in a direction having a tire circumferential direction component are provided at or near the tip of one side.
- the slits 5 have a width of 1.0 mm or less and extend in a direction having a tire circumferential direction component, and that many slits are provided.
- the slit width is larger than 1.0 mm, stress concentration may easily occur, and notch may be generated during slit processing, which is not desirable.
- a more preferable slit width is 0.5 mm or less. This is because the effect is sufficiently large and easy to process.
- the slit 5 does not extend in a direction having a tire circumferential direction component (XX direction (see FIG. 6)
- the EE direction is the tire width direction.
- the pneumatic tire of the present invention may have an adhesive rubber layer 6 in the innermost layer on the lumen side, as shown in FIG.
- the adhesive rubber layer 6 may be provided only in the vicinity thereof along the overlap splice portion S, or may be provided on the entire inner peripheral surface of the tire lumen.
- the slit 5 is preferably provided to be opened at the front end surface of the sheet. However, as shown in FIG. Even if it does not open to the leading end surface, it may be provided near the leading end of the sheet.
- the slit 5 is preferably provided with a slit pitch Sp of 1 mm or more and 15 mm or less.
- a slit pitch Sp of 1 mm or more and 15 mm or less.
- the slit pitch Sp refers to the distance between the central axes of adjacent slits.
- the slit width Sw is 1.0 mm or less.
- the slit 5 has a broken line shape (dotted line shape), it means a total length of individual slit lengths that are actually opened.
- the slit length Sl is preferably 0.2 times or more and 1.5 times or less of the overlap length S of the splice portion as the length of the tire circumferential direction component.
- the slit length S1 is less than 0.2 times the overlap length S of the overlap splice portion as the length of the tire circumferential direction component, the effect of relaxing the distortion by providing the slit is reduced. In some cases, it is not preferable, and the accuracy of slit processing is required, so that productivity is lowered. Further, if the slit length Sl is greater than 1.5 times the overlap length S of the splice portion as the length of the tire circumferential direction component, it may be a starting point of crack generation, which is preferable. Absent.
- the length S1 of the slit is not less than 0.4 times and not more than 1.0 times the overlap length L of the overlap splice portion as the length of the tire circumferential direction component. This is in order to satisfactorily exert the above-described shear strain mitigating effect brought about by the slit, and when it is 1.0 times or more, the slit itself may be the starting point of crack generation, which is not preferable. In order to exert the effect to a greater extent, it is preferably not less than 0.5 times and not more than 0.9 times the overlap length L of the splice part.
- the slits 5 are provided so as to exhibit a slit angle Sa intersecting at 30 ° to 90 ° with respect to the direction of the front end portion line 7 of the sheet 2. It is preferable. According to the knowledge of the present inventors, the effect of the present invention is sufficiently exhibited even when the slit angle Sa is 90 °, but the slit 5 is provided with a slit angle Sa within a range of 30 ° to 90 °. As a result, a greater stress relaxation effect and strain relaxation effect can be obtained. Particularly preferably, the slit angle Sa is in the range of 60 ° to 90 °. It is preferable that the slit 5 is provided with such an intersecting angle with respect to the direction of the front end portion line 7 of the sheet 2 because the generation of cracks along the slit 5 is remarkably suppressed.
- the slit is not limited to a straight line and extends, but is a wavy line as shown in FIG. 3A, a shape having a slit angle of less than 90 degrees as shown in FIG.
- an arcuate arc shape formed of one arc as shown in FIG.
- the crossing angle is the angle at which the wave traveling direction intersects with the direction of the tip end line 7 of the laminate sheet if it is wavy, or one arc
- the angle between the straight line connecting the starting point and the ending point of the arc and the direction of the tip end line 7 of the laminate sheet is taken.
- 3 (d) is an example in which the enlarged diameter portion 8 is provided in the innermost portion of the slit 5.
- stress concentration and strain concentration in the vicinity of the innermost portion of the slit 5 can be prevented, and the vicinity of the innermost portion can be prevented from becoming a starting point of crack generation.
- the slit 5 is provided at an end portion of the sheet 2 disposed on the tire lumen side of the sheet 2 made of the overlapping thermoplastic resin or the thermoplastic resin composition obtained by blending an elastomer in the thermoplastic resin. It is preferable that This is because cracks and detachment are more likely to occur on the lumen side, and the effects of the present invention can be greatly obtained. However, you may provide in the sheet
- the tip portion of the sheet 2 made of the thermoplastic resin constituting the overlap splice portion or the thermoplastic resin composition obtained by blending an elastomer in the thermoplastic resin is subjected to tip sharpening treatment. . This is because it is more preferable that the end portion of the sheet 2 is subjected to the tip sharpening process, so that the end portion of the sheet 2 is more difficult to peel off or turn over.
- the tip sharpening treatment is (t ⁇ 1/3) length from the tip of a sheet made of the thermoplastic resin or a thermoplastic resin composition obtained by blending an elastomer in the thermoplastic resin. It is preferable to use a material that has been sharpened at the tip so that the thickness T ( ⁇ m) has a relationship satisfying 0.1t ⁇ T ⁇ 0.8t at a position within the minute.
- t average thickness ( ⁇ m) in the tire circumferential direction of the non-tip sharpened portion of the sheet made of a thermoplastic resin or a thermoplastic resin composition obtained by blending an elastomer in a thermoplastic resin
- T Thickness of the sheet 2 at a position that is inward by (t ⁇ 1/3) length from the front end of the sheet 2 made of a thermoplastic resin or a thermoplastic resin composition obtained by blending an elastomer in a thermoplastic resin. ( ⁇ m) It is.
- (A) is a plan view
- (b) is a sectional view in the circumferential direction, and represents a YY section in the vicinity of the overlap splice shown in (a). It has a sharpened tip 9A with a diagonal line.
- sharpening the tip of the sheet made of such a thermoplastic resin or a thermoplastic resin composition obtained by blending an elastomer in the thermoplastic resin is effective in preventing the occurrence of peeling and the like.
- the tip sharpening treatment is performed at a level perpendicular to the slit sidewall from the tip of the slit sidewall of a sheet made of a thermoplastic resin or a thermoplastic resin composition obtained by blending an elastomer in the thermoplastic resin. It is preferable to use a material having a relationship in which the thickness T ( ⁇ m) satisfies 0.1t ⁇ T ⁇ 0.8t at a position inward in the direction by (t ⁇ 1/3) length.
- t average thickness ( ⁇ m) in the tire circumferential direction of the non-tip sharpened portion of the sheet made of a thermoplastic resin or a thermoplastic resin composition obtained by blending an elastomer in a thermoplastic resin
- T From the front end of the slit side wall of the sheet made of a thermoplastic resin or a thermoplastic resin composition in which an elastomer is blended in a thermoplastic resin, enter the inside in the direction perpendicular to the slit side wall (t ⁇ 1/3). Thickness of sheet 2 at different positions ( ⁇ m) It is.
- (C) is a plan view
- (d) is a sectional view in the radial direction (width direction), and represents a ZZ section in the vicinity of the overlap splice shown in (c).
- Both side wall portions of 5 have the tip sharpening portions 9B with hatching.
- the method of forming the tip sharpening portions 9A and 9B is not particularly limited.
- a blade used as a cutter When cutting the sheet 2 or when forming the slit 5 in the sheet 2, a blade used as a cutter, The tip is sharpened by cutting or forming a slit while applying a pressing force so as to crush the sheet 2 by setting the laser cutter or heat cutter to an appropriate high temperature (usually better than the glass transition temperature). Can be formed.
- FIG. 6 is a partially broken perspective view showing an example of the form of the pneumatic tire according to the present invention.
- the pneumatic tire T is provided so that the sidewall portion 12 and the bead portion 13 are connected to the left and right of the tread portion 11.
- a carcass layer 14 that is a skeleton of the tire is provided inside the tire so as to straddle between the left and right beads 13 in the tire width direction.
- Two belt layers 15 made of steel cord are provided on the outer peripheral side of the carcass layer 14 corresponding to the tread portion 11.
- An arrow X indicates the tire circumferential direction.
- An inner liner layer 10 is disposed inside the carcass layer 14 and an overlap / splice portion S thereof extends in the tire width direction.
- the crack or the thermoplastic resin composition forming the inner liner layer 10 that has been easily generated in the vicinity of the overlap splice portion S on the inner peripheral surface of the tire in the past.
- the occurrence of cracks between the sheet 2 made of a material and the tie rubber layer 3 and the occurrence of peeling are suppressed, and the durability is remarkably improved.
- the overlap length L of the overlap / splice portion S depends on the tire size, but is preferably about 7 to 20 mm, more preferably about 8 to 15 mm. This is because if the overlap length is too long, the uniformity is deteriorated, and if it is too short, the splice part may open during molding.
- FIG. 6 illustrates the case where a sheet made of a thermoplastic resin or a thermoplastic resin composition obtained by blending a thermoplastic resin and an elastomer is used as a sheet for forming an inner liner layer of a pneumatic tire, It can also be used as a reinforcing sheet layer for reinforcing a specific part of the tire.
- the overlap price portion S exists over the entire width of the tire, and a slit may be provided over the entire width of the splice portion, but this is not always necessary, and at least in the tire width direction, , “Extending from the end of the belt layer forming the maximum belt width to the tip of the bead filler” is preferable.
- the vicinity of the shoulder portion and the side wall portion is greatly deformed during traveling. Therefore, cracks and peeling are likely to occur near the splice portion, and it is effective and desirable to be provided in the region.
- it is provided within a region extending from the region on one side to the region on the opposite side (excluding the bead portion), and only the region or the region is sandwiched as appropriate. It may be arranged in the center area (tread portion) or both areas.
- this reinforcing layer When used as this reinforcing layer, it may be disposed inside the tire, for example, in a portion adjacent to a reinforcing layer such as a carcass layer or a belt layer, another rubber layer, or a bead portion, a side portion or a tread. It may be used for tire surface parts (both the outer surface and the luminal side surface) such as a part.
- a reinforcing layer such as a carcass layer or a belt layer, another rubber layer, or a bead portion, a side portion or a tread.
- tire surface parts both the outer surface and the luminal side surface
- thermoplastic resin examples include polyamide resins [for example, nylon 6 (N6), nylon 66 (N66), nylon 46 (N46), nylon 11 (N11), nylon 12 (N12). , Nylon 610 (N610), nylon 612 (N612), nylon 6/66 copolymer (N6 / 66), nylon 6/66/610 copolymer (N6 / 66/610), nylon MXD6 (MXD6), nylon 6T, nylon 9T, nylon 6 / 6T copolymer, nylon 66 / PP copolymer, nylon 66 / PPS copolymer] and their N-alkoxyalkylated products, such as methoxymethylated products of nylon 6, nylon 6 / 610 copolymer methoxymethylated product, nylon 612 methoxymethylated product, polyester Resin (for example, polybutylene terephthalate (PBT), polyethylene terephthalate (PET), polyethylene isophthalate (PEI), PET
- PET polybutylene ter
- thermoplastic resin and the elastomer constituting the thermoplastic resin composition that can be used in the present invention
- the elastomer include diene rubber and hydrogenated products thereof [for example, natural rubber (NR), isoprene rubber (IR), epoxidized natural rubber, styrene butadiene rubber (SBR), butadiene rubber (BR, high cis BR and Low cis BR), nitrile rubber (NBR), hydrogenated NBR, hydrogenated SBR], olefin rubber [eg, ethylene propylene rubber (EPDM, EPM), maleic acid modified ethylene propylene rubber (M-EPM), butyl rubber (IIR) ), Isobutylene and aromatic vinyl or diene monomer copolymer, acrylic rubber (ACM), ionomer], halogen-containing rubber [for example, Br-IIR, CI-IIR, brominated isobutylene-p-
- a compatibilizing agent a copolymer having a structure of both or both of a thermoplastic resin and an elastomer, or an epoxy group, a carbonyl group, a halogen group, an amino group capable of reacting with the thermoplastic resin or the elastomer is generally used.
- a copolymer having a oxazoline group, a hydroxyl group and the like can be taken.
- thermoplastic resin and elastomer may be selected depending on the type of thermoplastic resin and elastomer to be blended, but those commonly used include styrene / ethylene butylene block copolymer (SEBS) and its maleic acid modification, EPDM, EPM, EPDM / styrene or EPDM / acrylonitrile graft copolymer and its modified maleic acid, styrene / maleic acid copolymer, reactive phenoxin and the like can be mentioned.
- SEBS styrene / ethylene butylene block copolymer
- the amount of the compatibilizing agent is not particularly limited, but is preferably 0.5 to 10 parts by weight with respect to 100 parts by weight of the polymer component (the total of the thermoplastic resin and the elastomer).
- thermoplastic resin composition in which the thermoplastic resin and the elastomer are blended, the composition ratio of the specific thermoplastic resin and the elastomer is not particularly limited, and the elastomer is used as a discontinuous phase in the thermoplastic resin matrix. What is necessary is just to determine suitably so that it may have a dispersed structure, and a preferable range is 90/10-30/70 weight ratio.
- thermoplastic resin or a thermoplastic resin composition obtained by blending a thermoplastic resin and an elastomer is mixed with another polymer such as a compatibilizing agent as long as the necessary properties as an inner liner or a reinforcing material are not impaired. be able to.
- the purpose of mixing other polymers is to improve the compatibility between the thermoplastic resin and the elastomer, to improve the molding processability of the material, to improve the heat resistance, to reduce the cost, etc.
- the material that can be used include polyethylene (PE), polypropylene (PP), polystyrene (PS), ABS, SBS, and polycarbonate (PC).
- fillers (calcium carbonate, titanium oxide, alumina, etc.) generally incorporated into polymer blends, reinforcing agents such as carbon black and white carbon, softeners, plasticizers, processing aids, pigments, dyes, and aging
- An inhibitor or the like can be arbitrarily blended as long as necessary characteristics as an inner liner or a reinforcing material are not impaired.
- the thermoplastic resin composition has a structure in which an elastomer is dispersed as a discontinuous phase in a matrix of a thermoplastic resin.
- the elastomer can be dynamically vulcanized when mixed with the thermoplastic resin.
- the vulcanizing agent, vulcanization aid, vulcanization conditions (temperature, time), and the like in the case of dynamic vulcanization may be appropriately determined according to the composition of the elastomer to be added, and are not particularly limited.
- the resulting resin sheet is a sheet containing a vulcanized elastomer, so that it is resistant to external deformation (elasticity).
- it is easy to maintain the structure of the slit-shaped slit edge line, and the effect of the present invention can be obtained with certainty.
- a general rubber vulcanizing agent (crosslinking agent) can be used as the vulcanizing agent.
- sulfur vulcanizing agents include powdered sulfur, precipitated sulfur, highly dispersible sulfur, surface-treated sulfur, insoluble sulfur, dimorpholine disulfide, alkylphenol disulfide, and the like. 4 phr [In the present specification, “phr” refers to parts by weight per 100 parts by weight of the elastomer component. same as below. ] Can be used.
- Organic peroxide vulcanizing agents include benzoyl peroxide, t-butyl hydroperoxide, 2,4-dichlorobenzoyl peroxide, 2,5-dimethyl-2,5-di (t-butyl peroxide). Examples thereof include oxy) hexane, 2,5-dimethylhexane-2,5-di (peroxylbenzoate), and about 1 to 20 phr can be used.
- examples of the phenol resin vulcanizing agent include bromides of alkyl phenol resins, mixed crosslinking systems containing halogen donors such as tin chloride and chloroprene, and alkyl phenol resins. For example, about 1 to 20 phr is used. Can do.
- zinc white about 5 phr
- magnesium oxide about 4 phr
- risurge about 10 to 20 phr
- p-quinonedioxime p-dibenzoylquinonedioxime
- tetrachloro-p-benzoquinone poly-p- Examples include dinitrosobenzene (about 2 to 10 phr) and methylenedianiline (about 0.2 to 10 phr).
- a vulcanization accelerator as needed.
- the vulcanization accelerator include general vulcanization accelerators such as aldehyde / ammonia, guanidine, thiazole, sulfenamide, thiuram, dithioate, and thiourea, such as 0.5 to About 2 phr can be used.
- aldehyde / ammonia vulcanization accelerator hexamethylenetetramine and the like
- guanidinium vulcanization accelerator diphenyl guanidine, etc.
- thiazole vulcanization accelerator dibenzothiazyl disulfide (DM), 2-mercaptobenzothiazole and its Zn salt, cyclohexylamine salt, etc.
- sulfenamide vulcanization accelerators include cyclohexylbenzothiazylsulfenamide (CBS), N-oxydiethylenebenzothiazyl-2-
- thiuram vulcanization accelerators such as sulfenamide, Nt-butyl-2-benzothiazole sulfenamide, and 2- (thymolpolynyldithio) benzothiazole include tetramethylthiuram disulfide (TMTD), tetraethyl Thiuram disulfide (TMTD), te
- thiourea vulcanization accelerators examples include ethylenethiourea, diethylthiourea, etc. be able to.
- general rubber auxiliaries can be used together. For example, zinc white (about 5 phr), stearic acid, oleic acid and Zn salts thereof (about 2 to 4 phr) Etc. can be used.
- the method for producing a thermoplastic resin composition includes a thermoplastic resin in which a thermoplastic resin and an elastomer (unvulcanized in the case of rubber) are melt-kneaded in advance using a twin-screw kneading extruder or the like to form a continuous phase (matrix). By dispersing the elastomer as a dispersed phase (domain) in it. When the elastomer is vulcanized, a vulcanizing agent may be added under kneading to dynamically vulcanize the elastomer.
- various compounding agents for the thermoplastic resin or elastomer may be added during the kneading, but it is preferable to mix them in advance before kneading.
- the kneading machine used for kneading the thermoplastic resin and the elastomer is not particularly limited, and a screw extruder, a kneader, a Banbury mixer, a biaxial kneading extruder, or the like can be used.
- a twin-screw kneading extruder for kneading the thermoplastic resin and the elastomer and for dynamic vulcanization of the elastomer. Further, two or more types of kneaders may be used and kneaded sequentially. As conditions for melt-kneading, the temperature may be equal to or higher than the temperature at which the thermoplastic resin melts. The maximum shear rate during kneading is preferably 300 to 7500 sec ⁇ 1 .
- the entire kneading time is from 30 seconds to 10 minutes, and when a vulcanizing agent is added, the vulcanization time after addition is preferably from 15 seconds to 5 minutes.
- the polymer composition produced by the above method may be formed into a desired shape by a general thermoplastic resin molding method such as injection molding or extrusion molding.
- thermoplastic resin composition thus obtained has a structure in which an elastomer is dispersed as a discontinuous phase in a thermoplastic resin matrix.
- an elastomer is dispersed as a discontinuous phase in a thermoplastic resin matrix.
- the Young's modulus of the thermoplastic resin and the thermoplastic resin composition is not particularly limited, but is preferably 1 to 500 MPa, more preferably 25 to 250 MPa.
- the laminate sheet according to the present invention was overlapped and spliced to form an inner liner layer, and a forced test was performed.
- 215 / 70R15 98H was used as a test tire, and two tires were prepared for each example and comparative example, which were attached to a JATMA standard rim 15 ⁇ 6.5JJ, and the tire internal pressure was set to JATMA maximum air pressure (240 kPa).
- the vehicle traveled 50,000 km at a speed of 80 km / hour.
- the load is 8.82 kN, which corresponds to 120% of the maximum load load of JATMA, and this test is a compulsory / accelerated test that is much stricter than the normal use level.
- thermoplastic resin or thermoplastic resin composition sheet 2 constituting the inner liner layer is as shown in Table 1 in any of Comparative Example 1, Comparative Example 2, Examples 1 to 6, and Examples 7 to 12.
- a 150 ⁇ m thick sheet of a thermoplastic resin composition prepared by blending N6 / 66 as a thermoplastic resin and 50/50 BIMS as an elastomer was prepared.
- composition of the adhesive rubber is as shown in Table 2 in all examples.
- Examples 1 to 6 Comparative Example 1
- the shape and dimensions of the slits are as described in Table 3.
- the overlap length of the overlap splice part was all 10 mm.
- Examples 7-12, Comparative Example 2 The shape and dimensions of the slits are as described in Table 4. In Examples 1 to 6 and Comparative Example 1, the overlap length of the overlap splice part (overlap length L) was all 10 mm.
- Laminate sheet 2 Sheet of thermoplastic resin or a thermoplastic resin composition obtained by blending thermoplastic resin and elastomer 3: Tie rubber layer 3 ′: Layer of tie rubber 4: Blend of thermoplastic resin or thermoplastic resin and elastomer 5: slit 6: adhesive rubber layer 7: front end line of sheet 2 8: diameter-enlarged hole provided in the innermost part of the slit 9A, 9B: sheet 2 tip sharpening portion 10: inner liner layer 11: tread portion 12: sidewall portion 13: bead 14: carcass layer 15: belt layer L: overlap length T: pneumatic tire X: tire circumferential direction S: over Lap splice
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Abstract
Description
(1)熱可塑性樹脂または熱可塑性樹脂とエラストマーをブレンドした熱可塑性樹脂組成物からなるシートが、該熱可塑性樹脂または該熱可塑性樹脂組成物と加硫接着するゴムの層を介在させて該ゴム層の上下に積層されて形成されたオーバーラップ・スプライス部を有する空気入りタイヤにおいて、前記熱可塑性樹脂または熱可塑性樹脂とエラストマーをブレンドした熱可塑性樹脂組成物からなるシートとして、該シートの少なくとも片側の先端部あるいは先端部近傍に、スリット幅が1.0mm以下でかつタイヤ周方向成分を有した方向で延在するスリットが多数設けられたものが用いられてなることを特徴とする空気入りタイヤ。
(2)前記スリットが、スリットピッチが1mm以上、15mm以内を呈して設けられていることを特徴とする上記(1)記載の空気入りタイヤ。
(3)前記スリットの長さが、そのタイヤ周方向成分の長さとして、前記オーバーラップ・スプライス部のオーバーラップ長さの0.2倍以上、1.5倍以下であることを特徴とする上記(1)または(2)記載の空気入りタイヤ。
(4)前記スリットの長さが、そのタイヤ周方向成分の長さとして、前記オーバーラップ・スプライス部のオーバーラップ長さの0.4倍以上、1.0倍以下であることを特徴とする上記(3)記載の空気入りタイヤ。
(5)前記スリットが、前記熱可塑性樹脂または熱可塑性樹脂とエラストマーをブレンドした熱可塑性樹脂組成物からなるシートの先端部線方向に対して30°~90°のスリット角度を呈して設けられていることを特徴とする上記(1)~(4)のいずれかに記載の空気入りタイヤ。
(6)前記スリットが、前記オーバーラップ・スプライス部においてタイヤ内腔側に配された前記熱可塑性樹脂または熱可塑性樹脂とエラストマーをブレンドした熱可塑性樹脂組成物からなるシートに設けられていることを特徴とする上記(1)~(5)のいずれかに記載の空気入りタイヤ。
(7)前記オーバーラップ・スプライス部における前記熱可塑性樹脂または熱可塑性樹脂とエラストマーをブレンドした熱可塑性樹脂組成物からなるシートの先端部が、先端先鋭化処理されているものであることを特徴とする上記(1)~(6)のいずれかに記載の空気入りタイヤ。
(8)前記先端先鋭化処理が、前記熱可塑性樹脂または前記熱可塑性樹脂中にエラストマーをブレンドした熱可塑性樹脂組成物からなるシートの先端から、(t×1/3)長さ分内側に入った位置で、厚さT(μm)が、0.1t≦T≦0.8tを満足する関係を有するものであることを特徴とする上記(7)記載の空気入りタイヤ。
ここで、t:熱可塑性樹脂または熱可塑性樹脂中にエラストマーをブレンドした熱可塑性樹脂組成物からなるシートの非先端先鋭化処理部分のタイヤ周方向平均厚さ(μm)
T:熱可塑性樹脂または熱可塑性樹脂中にエラストマーをブレンドした熱可塑性樹脂組成物からなるシートの先端から、(t×1/3)長さ分内側に入った位置でのシート2の厚さ(μm)
(9)前記スリットの両側壁部が、先端先鋭化処理されているものであることを特徴とする上記(1)~(8)のいずれかに記載の空気入りタイヤ。
(10)前記スリットの両側壁部の先端先鋭化処理が、前記熱可塑性樹脂または前記熱可塑性樹脂中にエラストマーをブレンドした熱可塑性樹脂組成物からなるシートのスリット側壁の先端から、該スリット側壁と直角方向に(t×1/3)長さ分内側に入った位置で、厚さT(μm)が、0.1t≦T≦0.8tを満足する関係を有するものであることを特徴とする上記(9)記載の空気入りタイヤ。
ここで、t:熱可塑性樹脂または熱可塑性樹脂中にエラストマーをブレンドした熱可塑性樹脂組成物からなるシートの非先端先鋭化処理部分のタイヤ周方向平均厚さ(μm)
T:熱可塑性樹脂または熱可塑性樹脂中にエラストマーをブレンドした熱可塑性樹脂組成物からなるシートのスリット側壁の先端から、該スリット側壁と直角方向に(t×1/3)長さ分内側に入った位置でのシート2の厚さ(μm)
T:熱可塑性樹脂または熱可塑性樹脂中にエラストマーをブレンドした熱可塑性樹脂組成物からなるシート2の先端から、(t×1/3)長さ分内側に入った位置でのシート2の厚さ(μm)
である。この関係を図4(a)および(b)に示した。(a)が平面図であり、(b)はその周方向断面図であり、(a)に示したオーバーラップ・スプライス部付近のY-Y断面を表したものであり、シート2の先端が斜線を付した先端尖鋭化部9Aを有している。
T:熱可塑性樹脂または熱可塑性樹脂中にエラストマーをブレンドした熱可塑性樹脂組成物からなるシートのスリット側壁の先端から、該スリット側壁と直角方向に(t×1/3)長さ分内側に入った位置でのシート2の厚さ(μm)
である。
スリットの形状、寸法などは表3に記載した通りである。実施例1~6、比較例1において、オーバーラップ・スプライス部の重なり長さ(オーバーラップ長さ)は全て10mmとした。
スリットの形状、寸法などは表4に記載した通りである。実施例1~6、比較例1において、オーバーラップ・スプライス部の重なり長さ(オーバーラップ長さL)は全て10mmとした。
2:熱可塑性樹脂または熱可塑性樹脂とエラストマーをブレンドした熱可塑性樹脂組成物からなるシート
3:タイゴム層
3′:タイゴムの層
4:熱可塑性樹脂または熱可塑性樹脂とエラストマーをブレンドした熱可塑性樹脂組成物からなるシート2の先端部付近
5:スリット
6:接着ゴム層
7:シート2の先端部線
8:スリットの最奥部に設けられた拡径穴部
9A、9B:シート2の先端先鋭化部
10:インナーライナー層
11:トレッド部
12:サイドウォール部
13:ビード
14:カーカス層
15:ベルト層
L:オーバーラップ長さ
T:空気入りタイヤ
X:タイヤ周方向
S:オーバーラップ・スプライス部
Claims (10)
- 熱可塑性樹脂または熱可塑性樹脂とエラストマーをブレンドした熱可塑性樹脂組成物からなるシートが、該熱可塑性樹脂または該熱可塑性樹脂組成物と加硫接着するゴムの層を介在させて該ゴム層の上下に積層されて形成されたオーバーラップ・スプライス部を有する空気入りタイヤにおいて、前記熱可塑性樹脂または熱可塑性樹脂とエラストマーをブレンドした熱可塑性樹脂組成物からなるシートとして、該シートの少なくとも片側の先端部あるいは先端部近傍に、スリット幅が1.0mm以下でかつタイヤ周方向成分を有した方向で延在するスリットが多数設けられたものが用いられてなることを特徴とする空気入りタイヤ。
- 前記スリットが、スリットピッチが1mm以上、15mm以内を呈して設けられていることを特徴とする請求項1記載の空気入りタイヤ。
- 前記スリットの長さが、そのタイヤ周方向成分の長さとして、前記オーバーラップ・スプライス部のオーバーラップ長さの0.2倍以上、1.5倍以下であることを特徴とする請求項1または2記載の空気入りタイヤ。
- 前記スリットの長さが、そのタイヤ周方向成分の長さとして、前記オーバーラップ・スプライス部のオーバーラップ長さの0.4倍以上、1.0倍以下であることを特徴とする請求項3記載の空気入りタイヤ。
- 前記スリットが、前記熱可塑性樹脂または熱可塑性樹脂とエラストマーをブレンドした熱可塑性樹脂組成物からなるシートの先端部線方向に対して30°~90°のスリット角度を呈して設けられていることを特徴とする請求項1~4のいずれかに記載の空気入りタイヤ。
- 前記スリットが、前記オーバーラップ・スプライス部においてタイヤ内腔側に配された前記熱可塑性樹脂または熱可塑性樹脂とエラストマーをブレンドした熱可塑性樹脂組成物からなるシートに設けられていることを特徴とする請求項1~5のいずれかに記載の空気入りタイヤ。
- 前記オーバーラップ・スプライス部における前記熱可塑性樹脂または熱可塑性樹脂とエラストマーをブレンドした熱可塑性樹脂組成物からなるシートの先端部が、先端先鋭化処理されているものであることを特徴とする請求項1~6のいずれかに記載の空気入りタイヤ。
- 前記先端先鋭化処理が、前記熱可塑性樹脂または前記熱可塑性樹脂中にエラストマーをブレンドした熱可塑性樹脂組成物からなるシートの先端から、(t×1/3)長さ分内側に入った位置で、厚さT(μm)が、0.1t≦T≦0.8tを満足する関係を有するものであることを特徴とする請求項7記載の空気入りタイヤ。
ここで、t:熱可塑性樹脂または熱可塑性樹脂中にエラストマーをブレンドした熱可塑性樹脂組成物からなるシートの非先端先鋭化処理部分のタイヤ周方向平均厚さ(μm)
T:熱可塑性樹脂または熱可塑性樹脂中にエラストマーをブレンドした熱可塑性樹脂組成物からなるシートの先端から、(t×1/3)長さ分内側に入った位置でのシート2の厚さ(μm) - 前記スリットの両側壁部が、先端先鋭化処理されているものであることを特徴とする請求項1~8のいずれかに記載の空気入りタイヤ。
- 前記スリットの両側壁部の先端先鋭化処理が、前記熱可塑性樹脂または前記熱可塑性樹脂中にエラストマーをブレンドした熱可塑性樹脂組成物からなるシートのスリット側壁の先端から、該スリット側壁と直角方向に(t×1/3)長さ分内側に入った位置で、厚さT(μm)が、0.1t≦T≦0.8tを満足する関係を有するものであることを特徴とする請求項9記載の空気入りタイヤ。
ここで、t:熱可塑性樹脂または熱可塑性樹脂中にエラストマーをブレンドした熱可塑性樹脂組成物からなるシートの非先端先鋭化処理部分のタイヤ周方向平均厚さ(μm)
T:熱可塑性樹脂または熱可塑性樹脂中にエラストマーをブレンドした熱可塑性樹脂組成物からなるシートのスリット側壁の先端から、該スリット側壁と直角方向に(t×1/3)長さ分内側に入った位置でのシート2の厚さ(μm)
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DE112013005774.3T DE112013005774T5 (de) | 2012-12-03 | 2013-11-29 | Luftreifen |
US14/649,496 US20150315384A1 (en) | 2012-12-03 | 2013-11-29 | Pneumatic Tire |
JP2014551077A JPWO2014087942A1 (ja) | 2012-12-03 | 2013-11-29 | 空気入りタイヤ |
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WO (1) | WO2014087942A1 (ja) |
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JP2012166712A (ja) * | 2011-02-15 | 2012-09-06 | Sumitomo Rubber Ind Ltd | 空気入りラジアルタイヤ |
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JPH1029404A (ja) * | 1996-07-16 | 1998-02-03 | Yokohama Rubber Co Ltd:The | 空気入りタイヤおよびその製造方法 |
JP5126061B2 (ja) * | 2006-09-05 | 2013-01-23 | 横浜ゴム株式会社 | 空気入りタイヤ |
JP4983922B2 (ja) * | 2007-07-23 | 2012-07-25 | 横浜ゴム株式会社 | 空気入りタイヤ |
JP5423732B2 (ja) * | 2010-12-22 | 2014-02-19 | 横浜ゴム株式会社 | 空気入りタイヤ |
JP5707168B2 (ja) * | 2011-02-22 | 2015-04-22 | 株式会社ブリヂストン | 未加硫タイヤ及び空気入りタイヤ |
-
2013
- 2013-11-29 WO PCT/JP2013/082244 patent/WO2014087942A1/ja active Application Filing
- 2013-11-29 CN CN201380062815.6A patent/CN104822541B/zh not_active Expired - Fee Related
- 2013-11-29 US US14/649,496 patent/US20150315384A1/en not_active Abandoned
- 2013-11-29 DE DE112013005774.3T patent/DE112013005774T5/de not_active Withdrawn
- 2013-11-29 JP JP2014551077A patent/JPWO2014087942A1/ja active Pending
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JP2008308007A (ja) * | 2007-06-14 | 2008-12-25 | Bridgestone Corp | 空気入りタイヤ |
JP2009241855A (ja) * | 2008-03-31 | 2009-10-22 | Yokohama Rubber Co Ltd:The | 空気入りタイヤ |
JP2010167829A (ja) * | 2009-01-20 | 2010-08-05 | Yokohama Rubber Co Ltd:The | 空気入りタイヤ及びその製造方法 |
JP2012166712A (ja) * | 2011-02-15 | 2012-09-06 | Sumitomo Rubber Ind Ltd | 空気入りラジアルタイヤ |
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JPWO2014087942A1 (ja) | 2017-01-05 |
DE112013005774T5 (de) | 2015-08-27 |
CN104822541A (zh) | 2015-08-05 |
US20150315384A1 (en) | 2015-11-05 |
CN104822541B (zh) | 2018-04-03 |
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