JPH07110519B2 - tire - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a tire, and more particularly to a tire that can be continuously used after being punched with a nail or the like.

[Conventional technology]

Conventional pneumatic tires used for motorcycles and automobiles have to replace the perforated tires because the air leaks from the perforated holes when nails etc. are stuck, and if you do not have a spare tire, you will not be able to drive or drive. Become.
In order to overcome this drawback, a method of embedding a kind of reinforcing layer in the ground contact wall portion of the tire or dividing the tire into independent air chambers has been proposed. However, in the former case, the degree of perforation only decreases, and when the perforation occurs, the air leak rate decreases, but the above drawbacks still remain in motorcycles and automobiles. In the latter case, it is expensive and wear is uneven.

[Problems to be Solved by the Invention]

Therefore, an object of the present invention is to provide a tire in which air leakage is extremely small even if a nail or the like is stabbed.

A further object of the present invention is to provide a tire that does not need to be repaired even after removing the nail from the tire, since the amount of air leakage is extremely small.

[Means for Solving the Problems]

The tire according to the present invention has a tire main body adapted to be aligned with a tire frame, and a viscoelastic material layer capable of molecular aggregation immediately spreads on the tire inner surface even when a hole is formed in the tire with a nail or the like. As a result, tire air leakage is prevented.

[Operation and Example]

Other features and advantages of the present invention are described in detail below with reference to the accompanying drawings.

The tire of the present invention has a tire tread as shown in FIG.
Air is applied to the tire with respect to the two opposing side end portions 21 of the annular tire frame 20 which are integrally extended laterally from the opposite side ends of the annular ground wall portion 11 having 13 and the opposite side surface portions of the ground wall portion 11. And two opposing sidewall portions 12 that terminate in two tire lips 15 that are formed to match when filled, and further that the inner surface of the tire body 10 has more ground contact than the sidewall portions 12. The viscoelastic material layer 30 that is spread thicker on the part 11 is provided.

The viscoelastic material layer 30 has the following features.

1. It has excellent adhesive properties, so the tire body does not need adhesive.
It can be spread on 10 inner surfaces.

2. Since it has excellent elasticity, it adapts to the deformation of the tire body 10 of the traveling vehicle and does not impair the traveling stability of the vehicle.

3. Since the tire can withstand high temperatures up to about 100 ° C., the tire does not come off from the tire body 10 due to frictional heat generated by the tire of a high-speed vehicle.

4. Since the antioxidant rate is high, the tire body 10 does not age and become inoperable during its life.

5. Since the molecular cohesive force is strong, the tire body 10 can perform the functions described below.

When the nail 40 penetrates the wall 11 and the layer 30 as shown in FIG. 2A, the tire first leaks air through the perforation hole 41, which is within about 1 second, and as shown in FIG. 2B, Since the molecules of the layer 30 around the perforation holes are immediately aggregated, there is only a peripheral gap around the grounding wall 11, and the high pressure air in the tire helps the air of the tire not to leak any more from the perforation holes 41. Disappear.

When the nail 40 is pulled out from the tire as shown in FIG. 2C, the air of the tire begins to leak again from the perforation hole 41.
2 seconds and the layer 30 around the perforation hole 41 as shown in Figure 2D.
Molecules rapidly aggregate, leaving only lines instead of the original layer holes 41, so the tire air does not leak out of the holes 41 and requires no repair other than some pressure adjustment. .

The viscoelastic material layer 30 comprises 77 to 97% by weight of a plasticizer, 3 to 15% by weight of a resin, 0 to 2% by weight of a thixotropic thickener, 0 to 2% by weight of a stabilizer, and It can be produced by stirring and heating the constituents from .about.2% by weight of the stability enhancer and 0 to 2% by weight of the surfactant. For example, plasticizer DU
P (or DOP or DINP) 84-93% by weight, PVC as resin 6-12% by weight, silicon as thixotropic thickener 0.4-1.6% by weight, zinc tin stabilizer as stabilizer 0-0.3% by weight, 0 Soyoil as a stability enhancer
0.3 wt%, Surfysol 104A as a surfactant 0.1 ~
It can be 0.5% by weight.

As is apparent from the above, it is easy to understand how to achieve the objects of the present invention.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a preferred embodiment of the tire of the present invention, FIG. 2A is a schematic view showing the tire of FIG. 1 pierced with a nail, and FIG. 2B is a nail piercing the tire of FIG. FIG. 2C is a schematic view showing a state where a tire is being pulled out from the tire in FIG. 2B, and FIG. 2D is a schematic view showing a state of the perforated tire after the nail is pulled out. 10 …… Tire body, 11 …… Annular ground contact wall, 12 …… Opposite side wall, 13 …… Tire tread, 15 …… Tire lip, 20…
… Tire frame, 21… Opposite side, 30… Viscous elastic material layer, 40… Nail, 41… Perforation hole.

Claims (3)

[Claims] 1. Two opposing bead portions mounted so as to be aligned with two opposite end portions of an annular tire frame, and two opposing sidewalls integrally extended laterally from the respective bead portions. A tire main body having an inner surface formed with an annular grounding wall portion, and 77 to 97% by weight of a plasticizer and 3 to 15% by weight spread on the inner surface.
A viscoelastic material layer comprising the resin of claim 1, a thickener of 0 to 2% by weight, a stabilizer of 0 to 2% by weight, and a surfactant of 0 to 2% by weight. 2. The tire according to claim 1, wherein the spread thickness of the viscous elastic material layer on the ground contact wall portion is larger than the spread thickness on the sidewall portion. 3. A viscoelastic material layer comprising 84 to 93% by weight of a plasticizer and 6
~ 12 wt% resin, 0.4-1.6 wt% thickener and 0-0.3
0.1% to 0% by weight stabilizer and 0-0.3% by weight stability enhancer.
A tire according to claim 2 comprising 5% by weight of a surfactant.