JP2894748B2 - studless tire - Google Patents

studless tire

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Publication number
JP2894748B2
JP2894748B2 JP29997289A JP29997289A JP2894748B2 JP 2894748 B2 JP2894748 B2 JP 2894748B2 JP 29997289 A JP29997289 A JP 29997289A JP 29997289 A JP29997289 A JP 29997289A JP 2894748 B2 JP2894748 B2 JP 2894748B2
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JP
Japan
Prior art keywords
water
tire
tread
ice
soluble polymer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP29997289A
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Japanese (ja)
Other versions
JPH03159803A (en
Inventor
馨 小山
徹 福本
Original Assignee
住友ゴム工業株式会社
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Filing date
Publication date
Application filed by 住友ゴム工業株式会社 filed Critical 住友ゴム工業株式会社
Priority to JP29997289A priority Critical patent/JP2894748B2/en
Publication of JPH03159803A publication Critical patent/JPH03159803A/en
Application granted granted Critical
Publication of JP2894748B2 publication Critical patent/JP2894748B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Description

Description: TECHNICAL FIELD The present invention relates to a studless tire suitably used for running on snow and ice.

(Prior Art) Conventionally, spike tires, studless tires, and the like are used as tires used when traveling on snow and ice.

The spike tire is particularly excellent in slip prevention performance on an icy road surface. However, in recent years, when traveling on a pavement road, the road surface is severely worn, dust pollution has become a social problem, and its use is being regulated.

In recent years, studless tires have been developed to improve the low-temperature properties of tread rubber and provide the same grip performance as spiked tires, but these studless tires are slightly inferior to spiked tires, especially on icy road surfaces.

(Problems to be Solved by the Invention) The present invention has been made in view of the above-described problems, and has improved grip performance on snowy road surfaces and icy road surfaces, without deterioration in performance due to long-term use, and preventing road surface damage. It is intended to provide a studless tire that can be prevented.

(Means for Solving the Problems) That is, the present invention relates to a method for producing a polymer having a melting point of 180 ° C. or more and water
A powder having an average particle diameter of 20 to 600 μm of a water-soluble polymer having a solubility of 5 g or more in
Provided is a studless tire using a tread rubber composition containing up to 25 parts by weight.

The water-soluble polymer powder used in the present invention remains as particles in the tread rubber composition and is vulcanized as it is. When the obtained vulcanized rubber is used as a tread of a tire, the crystals of the water-soluble polymer powder are exposed on the tire surface due to abrasion, and exhibit a spike effect by scratching the ice surface on the road. Further, the water-soluble polymer powder exposed on the tire is dissolved by the molten water on the road, and an adhesive layer is formed between the road surface and the tire to exhibit a slip prevention effect. Furthermore, a water film formed between the tread surface and the ice surface further enhances frictional characteristics due to voids on the tread surface generated when the water-soluble polymer powder falls off from the tread surface or dissolves in water on the road surface. To improve the drainage effect and improve the grip performance on ice.

The water-soluble polymer preferably has a melting point of 180 ° C. or higher. If the melting point is lower than 180 ° C., the rubber composition reaches the melting point during vulcanization, and the desired void may not be obtained. The water-soluble polymer preferably has a solubility in water of 100 g at 0 ° C. of 5 g or more. This solubility
If the amount is less than 5 g, the water-soluble polymer powder does not dissolve in water, which may cause dust pollution. Further, a sufficient adhesive layer cannot be formed, and the slip prevention effect is reduced. The average particle size of the water-soluble polymer powder is 20 to 600 μm, preferably 50 to 300 μm
It is. If it is smaller than 20 μm or less, the intended draining effect is not exhibited. If it is larger than 600 μm, the tensile strength of the rubber itself will decrease. Preferred water-soluble polymers include, for example, sodium carboxymethyl cellulose, polyvinyl alcohol and the like.

The base rubber used in the tread rubber composition of the present invention may be any of those usually used, but in particular, natural rubber used for tires, synthetic polyisoprene rubber, high cis 1,4 polybutadiene rubber, styrene-butadiene rubber Etc. are preferred.

The tread rubber composition of the present invention contains the above water-soluble polymer in an amount of 3 to 25 parts by weight, preferably 10 to 20 parts by weight, based on 100 parts by weight of the base rubber. Within this range, the adhesion between the icy road and the tire can be improved. If the amount is less than 3 parts by weight, the drainage effect and the slip prevention effect cannot be obtained. If the amount exceeds 25 parts by weight, the rubber strength is reduced, the wear resistance of the tire is remarkably reduced, and the performance on ice is also reduced.

In addition to the above ingredients, the tread rubber composition according to the present invention may contain conventional ingredients such as vulcanization aids such as stearic acid and zinc oxide, and N-isopropyl-N-phenyl-p-.
Antioxidants such as phenylenediamine, vulcanization accelerators such as N-cyclohexyl-2-benzothiazylsulfenamide, various carbon blacks, process oils such as aromatic oils, and sulfur are appropriately added.

A rubber composition suitable for a tire tread can be obtained by sufficiently kneading the above components in a usual manner. The resulting tread rubber composition has a Tan δ peak temperature of preferably −40 ° C. or less. If the temperature is higher than −40 ° C., the temperature dependency of the modulus (particularly the hardness) becomes large, and the hardness becomes high in a low temperature region, and the grip performance on ice is reduced. A suitable tire tread is obtained by vulcanizing and curing the above tread rubber composition at 150 to 190 ° C. for 3 to 480 minutes depending on the size of the tire.

(Effect of the Invention) In a tire using the rubber composition of the present invention for a tread, the water-soluble polymer powder is exposed to the tread surface during running on an icy road, particularly during acceleration and turning during braking, and the ice surface is exposed. It exhibits a spike effect by scratching, and the gaps, irregularities and edges on the tread surface generated when the water-soluble polymer powder falls off from the tread surface or dissolves in Wear can be increased and the anti-slip performance on ice can be greatly improved. Furthermore, the water-soluble polymer powder exposed on the tire surface dissolves in the molten water on the road to form an adhesive film between the tread surface and the road surface, thereby further improving the slip prevention effect.

The voids caused by the water-soluble polymer powder falling off or dissolving in the water on the road surface are different from conventional spherical or spherical voids of foamed rubber or the like, and depending on the shape of the powder, a rectangular parallelepiped or other It also features a polygonal three-dimensional structure.

(Examples) Hereinafter, the present invention will be described in more detail based on examples.

Examples 1 to 5 and Comparative Example 1 The tread rubber composition was obtained by mixing the compounding compositions shown in Table 1 and vulcanized at 175 ° C for 15 minutes to form a tire tread.
A tire with the size of SR13 was created. The following tests were performed on the rubber composition and the tire.

"Tan δ peak temperature of tread rubber composition (° C)"
Was measured with a viscoelastic spectrometer manufactured by Iwamoto Seisakusho.

"Tread rubber hardness of tire" is JI manufactured by Kobunshi Keiki Co., Ltd.
It was measured with an SA hardness meter.

The “tread rubber tear strength of a tire” was measured by a Shimadzu Shopper type cloth tensile tester.

The stress at 100% elongation, the elongation at break, and the tensile strength of the tire tread rubber were measured with an Instron 1130 type tensile tester.

"Vulcanized test piece friction index on ice" was obtained by the following test method.

Test place: Hokkaido ice road surface test course Ice surface temperature: -3 to -2 ° C Test method: Friction coefficient during braking from 40 km / h was measured by a dynamic friction tester (manufactured by Sanko). It is represented by an index with Comparative Example 1 being 100.

The "on-ice tire test" was obtained by the following test method.

Test location: Hokkaido ice surface test course Ice surface temperature: -3 to -2 ° C Test vehicle: FF1500CC Domestic passenger car Rim: 5J × 13 Internal pressure: 1.9kg / cm 2 Front wheel: Test tire Rear wheel: 165SR 13 Summer tire (fixed) Test method: The vehicle traveled on an icy road at a speed of 30 km / h, the braking distance during lock braking was determined, and the reciprocal thereof was calculated.

"Torcushion test method": A test tire is mounted on the rear wheel of a tiger cushion test vehicle equipped with a fifth wheel, and the running speed is reduced.
The average coefficient of friction and the maximum coefficient of friction were measured at a slip ratio of 20% to 80% while maintaining the slip ratio at 5 kg / h, and the index was set as an index with Comparative Example 1 being 100. As is clear from Table 1, the studless tire of the present invention has significantly improved friction coefficient on ice, braking distance, and tiger cushion performance as compared with the conventional tire.

Continuation of front page (58) Field surveyed (Int.Cl. 6 , DB name) B60C 1/00 B60C 11/00

Claims (1)

(57) [Claims]
1. A melting point of 180 ° C. or more and 100 g of water at 0 ° C.
Particle size of water-soluble polymer whose solubility in water is 5 g or more
20 to 600 μm of powder is added to 3 to 25 parts per 100 parts by weight of base rubber.
A studless tire using a tread rubber composition containing parts by weight.
JP29997289A 1989-11-17 1989-11-17 studless tire Expired - Fee Related JP2894748B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP29997289A JP2894748B2 (en) 1989-11-17 1989-11-17 studless tire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP29997289A JP2894748B2 (en) 1989-11-17 1989-11-17 studless tire

Publications (2)

Publication Number Publication Date
JPH03159803A JPH03159803A (en) 1991-07-09
JP2894748B2 true JP2894748B2 (en) 1999-05-24

Family

ID=17879199

Family Applications (1)

Application Number Title Priority Date Filing Date
JP29997289A Expired - Fee Related JP2894748B2 (en) 1989-11-17 1989-11-17 studless tire

Country Status (1)

Country Link
JP (1) JP2894748B2 (en)

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0718358B1 (en) * 1994-12-19 1999-02-24 Sumitomo Rubber Industries Ltd. Rubber composition for treads of studless tyres
JP2002211203A (en) * 2001-01-19 2002-07-31 Sumitomo Rubber Ind Ltd Studless tire
FR2910903B1 (en) 2006-12-27 2009-03-06 Michelin Soc Tech Tread band comprising a guar gum powder
FR2910904B1 (en) 2006-12-27 2009-03-06 Michelin Soc Tech Roller band comprising a xanthan gum powder
FR2952645B1 (en) 2009-10-27 2011-12-16 Michelin Soc Tech Pneumatic bandage whose internal wall has a thermo-expandable rubber layer
US8336591B2 (en) * 2009-11-18 2012-12-25 The Goodyear Tire & Rubber Company Pneumatic tire with rubber component containing carboxymethylcellulose
FR2955584B1 (en) 2009-12-18 2014-08-22 Michelin Soc Tech Rubber composition for winter tire tread.
FR2956118B1 (en) 2009-12-18 2013-03-08 Michelin Soc Tech Rubber composition for winter tire tread.
FR2955328B1 (en) 2010-01-18 2013-03-08 Michelin Soc Tech Rubber composition for winter pneumatic bearing band
FR2957602B1 (en) 2010-03-19 2012-04-13 Michelin Soc Tech Rubber composition for winter pneumatic bearing band
US9034950B2 (en) * 2010-08-20 2015-05-19 The Yokohama Rubber Co., Ltd. Rubber composition and pneumatic tire
JP5694010B2 (en) * 2011-03-09 2015-04-01 東洋ゴム工業株式会社 Rubber composition for tire
FR2974538B1 (en) 2011-04-28 2013-06-14 Michelin Soc Tech Pneumatic improved ice adhesion
FR2975999B1 (en) 2011-06-01 2014-07-04 Michelin Soc Tech Tire having tread band comprising thermo-expandable rubber composition reducing rolling noise
FR2975997B1 (en) 2011-06-01 2013-06-14 Michelin Soc Tech Tire for vehicle with tread band comprising thermo-expandable rubber composition
FR2979076B1 (en) 2011-07-28 2013-08-16 Michelin Soc Tech Tire for vehicle with tread band comprising thermo-expandable rubber composition
FR2984902B1 (en) 2011-12-22 2014-01-17 Michelin Soc Tech Pneumatic improved ice adhesion
JP5918560B2 (en) * 2012-02-14 2016-05-18 東洋ゴム工業株式会社 Rubber composition for tire and pneumatic tire
FR2992322B1 (en) 2012-06-22 2015-06-19 Michelin & Cie Tire for vehicle with tread band comprising thermo-expandable rubber composition
FR2997409B1 (en) 2012-10-30 2015-01-23 Michelin & Cie Pneumatic improved ice adhesion
FR2997408B1 (en) 2012-10-30 2015-01-23 Michelin & Cie Pneumatic improved ice adhesion
FR2997407B1 (en) 2012-10-30 2015-01-23 Michelin & Cie Bandage for a vehicle with a tread band comprising a thermo-expansible rubber composition
FR2998509A1 (en) 2012-11-29 2014-05-30 Michelin & Cie Bandage for a vehicle with a tread band comprising a thermo-expansible rubber composition
FR2998510A1 (en) 2012-11-29 2014-05-30 Michelin & Cie Tire for vehicle with tread band comprising thermo-expandable rubber composition
EP3289011B1 (en) 2015-04-30 2019-03-20 Compagnie Générale des Etablissements Michelin A heat-expandable rubber composition

Also Published As

Publication number Publication date
JPH03159803A (en) 1991-07-09

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