KR19990001593A - Rubber composite chain for tires reinforced with fiber cords - Google Patents

Abstract

The present invention relates to carbon black having a iodine adsorption value of 36 g / kg or less and a dibutyl phthalate absorption rate of 90 cm 3/100 g or less with respect to 100 parts by weight of a rubber component composed of 40 to 90 parts by weight of natural rubber and 60 to 10 parts by weight of styrene butadiene rubber. The present invention relates to a rubber composite chain for tires having excellent braking force and driving force, comprising a rubber composition including at least a weight part and a fiber cord arranged in a vertical direction.

Description

Rubber composite chain for tires reinforced with fiber cords

1-1 is a cross-sectional view of the rubber composite chain of the present invention,

1-2 is a plan view of the rubber composite chain of the present invention,

FIG. 2 is an axial longitudinal cross-sectional view of the tire in which the rubber composite chains shown in FIGS. 1-1 and 1-2 are fitted in the tread grooves;

3 is a circumferential longitudinal cross-sectional view of a tire in which the rubber composite chains shown in FIGS. 1-1 and 1-2 are fitted in the tread grooves.

Explanation of symbols on the main parts of the drawings

1: Rubber composite chain 2: Fiber cord

3: tread block

The present invention relates to a rubber composite chain for a tire reinforced with a fiber cord, and more particularly, a rubber composite chain inserted into a groove of a tire tread portion exhibits characteristics of a general rubber block when driving on dry roads by injecting normal air pressure. The present invention relates to a rubber composite chain that increases the braking force and driving force of a tire, which acts as a tire block by acting as a foreign body block when driving with increased air pressure on a winter snow road.

In winter, car tires cannot function properly due to freezing by snow, so it is common to install a steel wire chain, which is a separate equipment, or replace them with winter tires.

Winter tires contain a lot of butadiene rubber so that they can function well even at low temperatures, and attach steel spike pins to provide braking and driving power on ice. In addition, using soft rubber to increase the friction area with the ground, the block of the tread was rather large, but the surface had many scratches in the longitudinal direction. However, since the spike pin is fixed to the tire and used, it must be used until the tire is replaced once it is mounted. Therefore, noise and vibration on dry roads become very severe, which makes it possible to drive at normal speed and deepen road surface destruction. Sometimes. For this reason, there is an international move to legally prohibit the use of spike pin-mounted tires. Winter tires created to compensate for these shortcomings are studless tires, which have been designed with the same concept as general winter tires, while rubber materials have been improved by being used in various ways. In other words, the foam rubber is injected into the tread rubber to form a microcell in the rubber, and the foam rubber tire to increase the contact area is mixed with the micro rubber or plastic to increase the braking force and the hybrid rubber cured at low temperature. It is improved and is used with the studless tire to use. However, in the case of studless tires, the braking force and the driving force are not excellent in freezing and snowing, and their utility is also halved. It is common to drive with a steel core attached to a steel wire chain or a rubber composite chain.

Tire chains are made differently according to the tire size, and it is common to twist the thick steel wire to make fixing pins with steel sheets, wrap them to the side of the tires, and then pull them tightly with rubber bands to fix them. It is also used to fix the road surface by friction or by attaching steel pins to the urethane mixture plate to fix them with rubber bands. The chain should be mounted on tires in very cold weather, mainly when it is snowy and is likely to be absent or freeze. When the road dries, it cannot be driven more than 50 km / hr. However, when such a chain is mounted on a tire, very loud noise and vibration are generated and road surface destruction and dust are generated by friction between the steel chain and the road surface, which causes environmental pollution.

It is an object of the present invention to provide a rubber composite chain reinforced with a fiber cord that fits into the groove of a tire tread and acts as a tire chain on an ice snow road surface to increase the braking and driving force of the tire.

The rubber composite chain of the present invention has an iodine adsorption value of 36 g / kg or less and a dibutyl phthalate absorption value of 90 cm 3/100 g or less with respect to 100 parts by weight of a rubber component composed of 40 to 90 parts by weight of natural rubber and 60 to 10 parts by weight of styrenebutadiene rubber. Characterized in that the rubber composition containing 80 parts by weight or more of carbon black and the fiber cord arranged in the vertical direction.

The fiber cord constituting the rubber composite chain of the present invention is preferably a nylon cord having a thickness of at least 1260 deniers or a polyester fiber cord having a thickness of at least 1500 deniers, which is surface coated with resorcinolaldehyde latex, and is surface coated with phenolic resin. Plastics, carbon fibers, glass fibers or aramid fibers having a diameter of 1 mm or less may be used.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings and examples.

As shown in FIGS. 1-1 and 1-2, the rubber composite chain of the present invention comprising a fiber cord having a trapezoidal cross section and arranged vertically with respect to the road surface has been used since the tire is mounted on a vehicle. It is inserted in the circumferential groove, which is the gap between the block of the tread part, and acts as a foreign material block on the ice snow road, and serves as a tire chain. 2 degrees). At this time, the groove is based on 3 to 5, the width (A) of the groove is 4 ~ 14㎜, the length (B) 6 ~ 10㎜ is suitable, so the rubber composite chain of the present invention is suitable for such groove It is configured to have.

The fiber cord constituting the rubber composite chain of the present invention is preferably a oyster fiber of 1260 data or more in case of nylon, or a thick fiber cord of 1500 data or more in case of polyester fiber, and the spacing is 10 to 32 (EPI) per inch. desirable. At this time, the outer skin of the fiber cord is coated with RFL (resosinolaldehyde latex) containing 40% of resorcinol and 20 to 30% of latex so that the rubber cord is easily adhered to. The thickness of the rubber to be coated is maintained at 8 to 16 mm, and as shown in FIG. 2, the rubber composite chain is sandwiched so that a large area of the sacrificial shape is located at the bottom of the groove, and the angle θ is 50. ° -85 degrees are preferable.

In addition, as shown in Figure 3, in the rubber composite chain of the present invention, the distance (C) of the rubber composite material is made of grooves similar to the blocks at intervals of 10-25 mm (C) to contribute to the increase in braking force of the tire.

The winter tire to which the rubber composite chain of the present invention is applied injects normal air pressure (20 psi) when driving on a dry road surface, so that the rubber composite material acts as a general rubber block so that the tire chain effect is small while driving on a snowy road surface. By injecting increased air pressure of 10 psi, the rubber composite material acts as a foreign material block to show the tire chain effect, which not only suppresses noise and vibration on dry roads, dust generation due to road breakage, etc. It provides excellent braking force and driving force.

EXAMPLE

The performance of the conventional winter tires and the tires to which the rubber composite chain of the present invention is applied was compared and tested on the snow surface, and the results are shown in the following table.

TABLE 1

Comparison of 195 / 70R14 Passenger Car Tires on Ice

(Note) 1) is the fiber material used in the rubber composite chain of the present invention is 1840 denia nylon cord 32 EPI, the rubber component is 32g iodine adsorption value to the raw material rubber component of 50 parts by weight of natural rubber and 50 parts by weight of butadiene rubber Composed of 80 parts by weight of carbon black / kg and DBP absorbance of 62 cm 3 / 100g, 3.7 parts by weight of sulfur, and a trace amount of vulcanization accelerator and activator, which is applied to general rubber, the interval of rubber composite is 15 mm.

Claims (3)

80 parts by weight or more of carbon black having an adsorption value of iodine of 36 g / kg or less and a dibutyl phthalate absorption rate of 90 cm / 100 or less with respect to 100 parts by weight of a rubber component composed of 40 to 90 parts by weight of natural rubber and 60 to 10 parts by weight of styrenebutadiene rubber Rubber composite chain for tires, characterized in that consisting of a rubber composition and a fiber cord arranged in a vertical direction. The method of claim 1, The fiber cord is a rubber composite chain for tires, characterized in that the nylon cord having a thickness of at least 1260 denier or a polyester fiber cord having a thickness of at least 1500 denier coated with resorcinolaldehyde latex. The method of claim 1, The fiber cord is a rubber composite chain for tires, characterized in that the plastic, carbon fiber, glass fiber or aramid fiber having a diameter of 1 mm or less surface-coated with phenolic resin.