JPH10146469A - Surface stratifying material for horse racecourse - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate or reduce maintenance burden in any seasons, to allow horses to exercise racing to run the racecourse in a good run and safely, and to obtain a good cushioning in particular, by making the racecourse with a surface stratifying substratum for racecourse that is coated with an oil-absorbed/ swollen oil-absorbent resin. SOLUTION: An oil-absorbent resin with a tertiary-bridging structure as an oil-absorbent resin acquiring a surface stratifying material for racecourse a water-soluble oil as an oil to be absorbed into the oil-absorbent resin and sand/wooden chips, etc., as a surface stratifying substratum for racecourse, are employed. Putting-into/mixing with a mixer the surface stratifying substratum for racecourse and appropriate amounts of oil-absorbent resin/oils at a room temperature, result in having the oil-absorbent resin absorb the oils to become a swollen state, which is then coated throughout the peripheral surface or locally over the surface stratifying substratum for racecourse. This surface stratifying substratum contains the oils to demonstrate both the viscosity and repellence, thus, obtaining the surface stratifying material demonstrating a rich cushion via the cushioning ability by the surface stratifying substratum and the elasticity by oil-swelling the oil-absorbent resin.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to horse racing, dressage,
The present invention relates to a surface material that constitutes a variety of riding grounds, such as a riding ground for horse racing and riding competitions, and a riding ground for training, grazing, and riding.

[0002]

2. Description of the Related Art In a riding ground, a surface layer for a cushion is generally formed on a roadbed. Conventionally, this surface layer has been formed of sand.

[0003]

In the case of sand, if it is in a state containing a moderate amount of water, a good foothold and a cushioning property can be obtained. However, in a dry season such as summer, moisture evaporates to dry sand. As a result, the foothold deteriorates and the dust soars, so that it becomes difficult to drive and visibility deteriorates. In addition, hygiene is also worse. For this reason, watering work has been required to prevent the occurrence of such troubles. During the rainy season such as the rainy season, the water content may exceed an appropriate amount or water may float on the surface due to rainfall exceeding the water retention and drainage capacity of the sand. Then
Cushioning properties and footholds deteriorate, making exercise and running difficult. In addition, failures or accidents may occur due to insufficient cushioning or slippage. In addition, the mud jumps up and visibility becomes worse. Therefore, it is necessary to prevent the occurrence of these troubles by performing drainage work such as harrowing. In addition, in cold seasons such as winter, if water is retained, the water freezes, causing troubles in exercise and a danger of slipping. For this reason, anti-freezing work such as spraying an anti-freezing agent or performing harrowing has been required.

[0004] Conventionally, as a surface material for a riding ground to solve such problems, there are hitherto, for example, a riding ground cushion material disclosed in JP-A-4-73085 and a riding ground cushion material disclosed in JP-A-6-15065. Was. The former Baba cushion material is made of sand coated with an olefin polymer having a carboxylic acid group or a carboxylic anhydride group or an oxygen-containing wax, and the latter Baba cushion material is made of silicone, urethane, or vinyl acetate. It is made of sand coated with or adhered to components composed of a water-insoluble synthetic resin such as a system and oil. Both cushioning materials exhibit viscosity and water resistance so that the generation of dust can be suppressed and a foothold can be obtained, and the occurrence of mud and water pools can be prevented. The former Baba cushion material does not sacrifice the cushioning property of sand due to the viscosity and water resistance of the sand particles. The latter cushion material for horseback uses the sand with hardness to improve the durability against the impact so as to prevent the sand particles from being broken by the impact and deteriorating the cushioning property. That is, the cushioning properties of any of the cushioning materials are exhibited by the sand, not the resin.

[0005] It is an object of the present invention to be able to exercise and run safely and with good running performance while eliminating or reducing the time and effort of management in any period such as the dry season and the rainy season, and to obtain the state for a long period of time. In particular, it is an object of the present invention to provide a surface material for a riding ground capable of forming a riding ground surface layer capable of obtaining a particularly rich cushioning property.

[0006]

Means for Solving the Problems In order to achieve the object, the invention according to claim 1 is a bed material comprising a bed material having a swelling oil-absorbing resin adhered thereto.

That is, the oil on the surface of the oil-absorbent resin that has swollen by absorbing the oil and the Baba surface layer base material come into contact with the entire surface of the surface layer material or locally, and the surface layer material removes the oil component. Prepare. Even in the dry season or the cold season, the oil retaining capacity of the oil-absorbing resin hardly changes, the oil does not evaporate or deteriorate, and the oil-absorbing resin comes in contact with water due to rainfall etc. However, the oil held by the resin does not easily flow out, the oil always comes into contact with the surface material, and the surface material always has an oil content and exhibits viscosity and water repellency irrespective of a change in time. This makes it difficult for the surface layer base materials to adhere to each other via the oil and the resin in the drying period and to be scattered.
In the rainy season and the cold season, water easily flows between the surface layer materials and on the surface layer, and hardly stays inside or on the upper surface layer, and muddy or freezing is easily avoided. Since the surface base materials adhere to each other and are hardly muddy or frozen, the surface base material can be exhibited without impairing the inherent cushioning property. In addition, since the oil-absorbing resin has elasticity because it swells by absorbing oil, at any time, both the cushioning property inherent to the surface layer base material and the elasticity exhibited by the oil-absorbing resin, Exhibits better cushioning properties than conventional cushion sand and cushioning materials. The oil held by the oil-absorbent resin does not easily flow out due to rainfall, etc., and the surface material comes into contact with the oil for a long time to exhibit viscosity and water repellency, and the cushioning property due to the swelling of the oil-absorbent resin is extended. Demonstrate over. Therefore, at any time, such as summer or rainy season,
Even without watering or draining work, even if it is done relatively easily, even if it is done, it can be safely run in a good running condition with good foothold and less occurrence of dust, mud jumping up and slipping etc. In addition, the load imposed by the traveling shock is effectively alleviated, so that the riding ground surface layer which can exercise and run while avoiding the fatigue and illness induced by the impact and maintains this state for a long time can be obtained.

[0008] By exhibiting cushioning properties richer in cushioning capacity than conventional cushion sand and cushioning materials,
For example, a horse that has a fault or has just healed can be easily exercised because the impact load is light.
A dressing surface layer is obtained which can be used advantageously.

According to the second aspect of the present invention, the Baba surface layer base material is sand, and the oil-absorbing resin absorbing oil is:
Since it is contained at a blending ratio of about 2% by weight with respect to the sand, it has excellent cushioning properties while having excellent water permeability, and has excellent cushioning properties. It is possible to surely obtain a riding ground surface layer that can exercise or run in a safe state in which dust and mud are unlikely to jump up in a good running state.

According to the third aspect of the present invention, since the oil has a pour point of 0 ° C. or less, the oil does not freeze even at a relatively low temperature, and has a good foothold even in a cold season. It is possible to reliably obtain a riding ground surface layer capable of exercising or running in a state of good cushioning and good running properties, and in a safe state in which slip is unlikely to occur.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION As the oil-absorbing resin for obtaining the surface layer material of the present invention, an oil-absorbing resin having a loose three-dimensionally crosslinked structure is employed. That is, when oil is absorbed, oil that retains the oil and expands in volume is employed. There are compositions composed of acrylic acid polymers and organic fatty acid salts and inorganic salts. Specifically, there are crosslinked copolymers of polynorbornene, alkylstyrene, alkyl (meth) acrylate, hydroxyalkyl (meth) acrylate and the like.
These oil absorbing powers vary depending on the type of oil to be absorbed, but when oil is absorbed, the volume expands up to about 25 times.

As the oil to be absorbed by the oil absorbing resin, a water-insoluble oil is used. As the oil, any one of a mineral oil, a synthetic oil, an animal and vegetable oil and the like, or a combination of two or more kinds is used. Silicone oil as synthetic oil,
There are α-olefins, alkyl diphenyls, ethers and the like, and animal and vegetable oils include linseed oil, castor oil, tall oil, coconut oil and the like. The oil preferably has a pour point of 0 ° C. or less. If the pour point is higher than 0 degrees, the oil may freeze in the cold season, and the bed may become unusable. An additive having a pour point of 0 ° C. or less can be used by adding an additive to a mineral oil or the like for the purpose of lowering the pour point. Viscosity is 40 degrees Celsius and 10-1000mm ²
/ Sec is preferable, and the flash point is 150 degrees Celsius.
It is preferable that the degree is higher than the degree.

Sand, wood chips, and the like are used as the base material for the surface of the riding ground. The sand includes river sand, sea sand, natural sand such as mountain sand, artificial sand, and the particle size is 0.074 to 2.0 mm.
Adopt the ones. Further, a rubber chip or a synthetic resin chip obtained by shredding a coating of tire rubber or an electric wire may be added to increase cushioning property.

[0014] The above-mentioned surface layer base material, an appropriate amount of oil-absorbing resin and oil are put into a mixer and mechanically stirred at room temperature to absorb the oil-absorbing resin to form a volume-expanded swelling state. The oil-absorbing resin is applied over the entire surface of the Baba surface layer base material or locally, and the surface layer material has an oil component to exhibit viscosity and water repellency, and the cushioning property and oil absorption by the surface layer base material A Baba surface layer material exhibiting rich cushioning properties both by elasticity due to swelling of the water-soluble resin. Then, the track surface layer is formed by laying the track surface material on the track roadbed. Alternatively, the above-mentioned Baba surface layer base material and an appropriate amount of an oil-absorbent resin are put into a mixer in advance and mechanically stirred and spread over a Baba roadbed, and an appropriate amount of the above-described oil is sprayed thereon and harrowing is performed. In addition, the oil-absorbing resin absorbs oil to form a swollen state in which the volume has expanded, and the swollen oil-absorbing resin is adhered to the entire surface of the Baba surface layer base material or locally, so that the surface layer base material becomes viscous and repellent. A ground material surface layer material that exhibits water-based properties and exhibits a rich cushioning property by both a surface layer base material and an oil-absorbing resin is obtained, and a ground surface layer is formed by laying the surface material layer on a roadbed.

When the viscosity of the oil is high, the oil is heated beforehand to lower the viscosity and mixed. Then, the resin becomes easy to absorb oil and the oil-absorbed resin becomes easy to disperse, so that a Baba surface layer material can be obtained with high precision from the viewpoint of oil absorption of the resin itself and the surface of adhesion between the resin and the surface substrate.

In the case of a bed where cushioning properties may be slightly lower, the amount of the oil-absorbing resin of the oil-absorbing and swelling type described above is reduced, and an oil-absorbing resin such as a long-chain alkyl acrylate polymer is added. Baba surface material may be created by doing. In this case, the function of bringing the oil-absorbing resin that has absorbed the oil into contact with the surface layer base material and providing the surface layer base material with an oil component to exhibit viscosity and water repellency over a long period of time is the same as the oil-swelling type oil-absorbing resin. The same is demonstrated.

[0017]

【Example】

Example 1: Oil-absorbing resin (Olesorb, manufactured by Nippon Shokubai Co., Ltd.)
And a mineral oil exhibiting a pour point of -30 degrees Celsius were mixed and stirred at the following ratio to create an oil-absorbing resin that had absorbed and swollen the oil. This swollen oil-absorbing resin, cushion sand and Was blended at the following ratio and stirred to obtain Baba surface layer material A. Mixing ratio of oil-absorbing resin and oil: Oleosorb manufactured by Nippon Shokubai Co., Ltd .: 30 g Mineral oil: 70 g Content of swollen oil-absorbing resin: 2% by weight based on weight of dried cushion sand

Example 2 An oil-absorbing resin (Olesorb, manufactured by Nippon Shokubai Co., Ltd.) and a mineral oil having a pour point of -30 degrees Celsius are blended in the following ratio and stirred to absorb the oil and swell. The swelled oil-absorbing resin and cushion sand were mixed at the following ratio and stirred to obtain a Baba surface layer material B. Compounding ratio of oil-absorbing resin and oil: Oleosorb manufactured by Nippon Shokubai Co., Ltd .: 30 g Mineral oil: 70 g Content of swelling oil-absorbing resin: 7% by weight based on the weight of dried cushion sand

Comparative Example: Baba surface layer material C was obtained using only cushion sand containing 4 to 6% of water.

With respect to the bed materials A and B of the example and the bed material C of the comparative example, each test of water resistance, water permeability, water absorption expansion, PN penetration and bulk density measurement were performed. The results of the water resistance test, water permeability test, water absorption expansion test, and bulk density measurement are shown in the following table.
2 shows the results of the PN penetration test in Table 3 below. Each test and measurement were performed as follows.

Water resistance test: 500 m of tap water in a beaker
After boiling the mixture, add 30 g of sample
After heating for minutes, the state of oil separation on the surface of water was observed. Regarding the Baba surface layer materials A and B, floating of resin and the like on the water surface was slightly confirmed at the time of charging the sample. However, no change was observed during boiling. Baba surface material C
No change was observed in the sample at the time of charging the sample and at the time of boiling.

Measurement of bulk density: Measurement was performed according to JIS-K-3362. The bulk density was calculated by the following equation.

S = (W2-W1) / V

S: bulk density, W2: mass of cup containing sample (g), W1: mass of empty cup (g), V: capacity of cup (ml)

Water Permeability Test: Specimens were prepared under the conditions for preparing the test specimens in Table 1 below, and subjected to a variable water permeability test according to JSF T 311 to calculate a water permeability coefficient. Calculation of the water permeability coefficient kT (cm / sec) with respect to the water temperature T degrees Celsius at the time of measurement was performed by the following equation.

[0026]

(Equation 1)

PN penetration test: Specimens were prepared under the conditions of the Japan Central Racing Association shown in Table 1, and were tested at room temperature (20 degrees Celsius) using a Proctor Needle tester according to ASTM D1558.
) And depths of 25 (mm) and 50 (mm)
b) was measured, and the penetration resistance (Lb / in ² ) was calculated. The test conditions were as follows: needle head cross-sectional area φ4.5 m / m (1/4
0 in ² ) using a metal rod, and the penetration speed was 6.0 (mm).
/ Sec).

Water Absorption Swelling Test: Specimens were prepared under the conditions of the Japan Central Racing Association shown in Table 1. The specimen was placed on a 5 kg effective plate with a shaft, immersed in a water tank for 4 days (96 hours) up to the upper surface of the specimen, and then drained for 1 hour to measure the amount of water absorption.

Preparation conditions of test specimen: Table 1 shows the preparation conditions of the test specimen used in each test. In addition, the water permeability test was performed for the size φ1
Since the method is applicable only to a specimen of 00 × 127 mm, the production conditions of the specimen were determined by converting the compaction energy of the specimen based on the conditions of the Japan Racing Association.

[0030]

[Table 1]

[0031]

[Table 2]

[0032]

[Table 3]

As shown in the test results in Table 2, the amount of water absorbed by the Baba surface materials A and B was smaller than the amount of water absorbed by the Baba surface material C. A,
It can be seen that B is more drainable than C. And, as the content of the oil-absorbing resin swollen by absorbing the oil,
When 7% by weight based on the weight of the cushion sand is used, the water permeability is lower than when no resin is included. When 2% by weight based on the weight of the cushion sand is used, the water permeability is lower than when the resin is not included. Will be better. In other words, when cushion sand is used as the surface layer base material, a water-absorbing resin that absorbs oil and swells is blended at a ratio of 2% by weight with respect to the weight of the cushion sand to provide a good drainage property. A surface material is obtained.

When the oil-absorbing resin which has swollen by absorbing oil is blended in a ratio of 1.5 to 5% by weight with respect to the cushion sand, the same cushioning property and drainage as in the case of blending at a ratio of 2% by weight are obtained. The effect of the nature is obtained and it can be used practically.

Claims (3)

[Claims] 1. A Baba surface layer material comprising a Baba surface layer substrate to which an oil-absorbing resin which has swollen by absorbing oil is adhered. 2. The Baba surface layer according to claim 1, wherein the Baba surface layer base material is sand, and the oil-absorbing resin absorbing oil is contained in a mixing ratio of about 2% by weight with respect to the sand. Wood. 3. The surface material of claim 1, wherein the oil has a pour point of 0 ° C. or less.