JPS5814082Y2 - Puncture sealant capsule - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to puncture sealant capsules.

Conventionally, various proposals have been made regarding the safety of pneumatic tires in the event of a puncture.

An example of this is a method in which a certain amount of rubber powder, short fibers, or inorganic filler particles, alone or as a mixture, is sealed inside the tire as a puncture sealant.

When the tire is running, the puncture sealing material is distributed evenly over the entire circumferential inner surface of the tire, falling in an area extending from one shoulder of the tire to the other due to centrifugal force, and nails, etc. If the nail punctures the hole, the nail puller concentrates on and penetrates the nail hole, which has the effect of closing the puncture hole later.

By the way, there are two ways to seal the puncture sealant inside the tire:
There is a method of making a hole in the vulcanized tube, sealing it through the hole, and repairing the hole with a puncture repair punch.

In the above MiO method, puncture sealants with large particle sizes cannot be used, and the puncture sealant often blocks the pulp, allowing smooth sealing.

On the other hand, in the method (2), it is possible to arbitrarily provide a larger L/hole than in the case of pulp processing, but if the hole is too large, it becomes impossible to repair the punch, and there are problems in that it takes time to repair the seal.

Furthermore, in the method (2) above, powdered or liquid puncture sealant is directly sealed into the vulcanized tube, so measuring and filling the puncture sealant is troublesome.

The present invention is basically aimed at solving this problem.The purpose of the present invention is to pre-fill a puncture sealant into a special capsule to make it easier to handle the puncture sealant. The capsule is inserted through the opening of a tube that has been cut to size, splined at both openings of the tube, vulcanized and molded into a tire tube, and then artificially applied external pressure to destroy the capsule before being installed inside the tire. , it is possible to uniformly disperse the puncture sealant in the capsule inside the tire tube.

As shown in FIG. 2, the capsule 3 according to the present invention has 140
It is heat resistant and can withstand vulcanization temperatures from ℃ to 180℃.
After the tire tube 1 is vulcanized, it can be easily destroyed if external pressure is artificially applied to it before it is installed in the tire.

Synthetic polymer materials such as polyester and polybutadiene rubber films, and natural polymer materials such as paper can be used as materials that satisfy these conditions.

The thickness of this polymeric material is less than 0.5 rrvn, preferably less than 0.1 rrvn.

The shape of the capsule 3 filled with the puncture sealant 4 is not particularly limited (although it is preferably a hollow cylinder with rounded ends).

This is because if the end is angular and L-shaped, the inner surface of the tire tube 1 will be damaged by the end when inserted into the tire tube 1.

Also, the diameter of capsule 3 is small and moderately large.

If the diameter is large, only that portion of the unvulcanized tube rubber will be deformed by inserting the capsule 3 into the tube, resulting in uneven thickness of the rubber after vulcanization.

Therefore, it is desirable that the capsule 3 has a small diameter and is long.

The capsule 3 can be produced by filling a bottomed cylindrical body with puncture sealant 4 and then putting a lid on it, or by filling a pair of bottomed cylindrical bodies with puncture sealant 4 and then fitting both bodies together. , can be manufactured by a conventionally known method.

The puncture sealing agent 4 used in the present invention is made of fine particles of different sizes (for example, particle diameters of 1μ to 2wn) made of polymeric materials alone or in combination with this polymeric material, as shown in Table 1 of Examples below. Fine particles and short fibers of material (e.g. 50μ~3
rIrIn length) or/and inorganic filler (e.g. 5
It is a powder consisting of a mixture of particles with a particle diameter of 0.00 μm.

The fine particles of the polymeric material are manufactured by finely pulverizing rubber or synthetic resin having appropriate elasticity using a known powder manufacturing method, and include rubber products such as old tires and urethane foam, and plastic products. pulverized waste can be utilized.

The fine short fibers are cut from natural or synthetic fibers such as cotton, nylon, and rayon, glass fibers, metal fibers, etc. with a size of 1 L and 10 denier.

Inorganic fillers include asbestos powder, graphite, mica, carbon blank, calcium carbonate, silica, zinc white, etc.

Next, in order to insert the capsule 3 filled with the puncture sealant 4 according to the present invention into the tube, it is necessary to add a capsule insertion step to the conventional tube manufacturing process, and the flowchart is shown in FIG. Shown below.

As is clear from this figure, the process of vulcanizing the tire tube 1 from mastication and compounding of raw rubber is similar to the conventional tube manufacturing process, but in the present invention, the capsule 3 filled with the puncture sealant 4 is added to the molding process. Once the pulp 2 has been pasted at a temperature of Shape.

Then, the tire tube 1 containing the capsule is vulcanized and molded as it is.

Thereafter, the same process is carried out, but before the tire tube 1 is installed in the tire, external pressure is artificially applied to destroy the capsule 3, and the puncture sealant 4 in the capsule 3 is poured into the tube. Distribute evenly.

The tire tube 1 manufactured in this way had no quality problems like those produced by conventional manufacturing methods, and a sufficient puncture sealing effect was observed.

In addition, as shown in Figure 1 below, fine particle powders of different sizes are used as the puncture sealant 4, so regardless of the size of the puncture, it can quickly and reliably seal the puncture at the initial stage of the puncture. This has an extremely excellent practical effect, as it substantially prevents pancture and enables continued safe driving.

Examples will be explained below.

Example 1 In order to confirm the effectiveness of the present invention, a tire tube 1 into which a capsule 3 filled with a puncture sealant 4 was inserted was manufactured under the conditions shown in Table 1.

Even if the step of inserting the capsule 3 containing the puncture sealant according to the present invention is added, the subsequent molding of the tire tube 1,
There was no problem in the vulcanization process, and the capsule 3 containing the puncture sealant was not destroyed even after the tire tube 1 was vulcanized, and no deterioration of the puncture sealant 4 was observed.

After the tire tube 1 was vulcanized, when external pressure was applied by loosening the capsule 3 by hand from outside the tire tube 1, the capsule 3 was easily destroyed and the puncture sealant 4 was uniformly dispersed inside the tire tube 1. .

As mentioned above, since the present invention is a special capsule pre-filled with puncture sealant, it is easier to handle the puncture sealant, and it is easier to handle the puncture sealant than with the conventional method of directly sealing it into the tube. You won't have to worry about work anymore.

In addition, after vulcanizing and molding a tire tube containing a capsule, the capsule is destroyed when external pressure is applied artificially, and the puncture sealant inside the capsule is evenly dispersed inside the tire tube. There is also the risk of puncture sealant sticking to the tire tube.

[Brief explanation of drawings]

FIG. 1 is a flowchart for manufacturing a tire tube according to the present invention, and FIG. 2 is a partially sectional perspective view of a tire tube into which a capsule containing a puncture sealant according to the present invention is inserted. 1... Tire tube, 2... Valve, 3... Capsule containing puncture sealant, 4...
... Puncture sealant.

Claims (1)

[Scope of utility model registration request] It is molded into a hollow shape made of a heat-resistant polymer material that can be broken by artificial external pressure and can withstand vulcanization temperatures, and the inside is filled with a puncture sealant mainly composed of rubber powder of fine particles of different sizes. A puncture sealant capsule characterized by comprising: