JP2509417B2 - Method for manufacturing laminated rubber chip mat - Google Patents

Description

Detailed Description of the Invention

[0001]

The present invention relates to, for example, a method for the production of rubber chips made of mats that are laid in the passage or the floor, such as golf courses and other sports facilities.

[0002]

2. Description of the Related Art Generally, a rubber mat is laid in aisles and floors of golf courses and other sports facilities to protect spike shoes. As a material for such a rubber mat, water permeability is required so that water does not accumulate on the mat surface in rainy weather, so a mixture of a rubber chip and a binder that can easily secure a space inside the mat is used. Generally used. The rubber chip mat molded from a mixture of rubber chips and binder is
In addition to the durability unique to rubber, it also has cushioning properties.
The degree of cushioning property can be easily changed by changing the gap between the rubber chips, that is, the porosity of the rubber chip mat.

[0003]

However, if the porosity of the mat is increased in order to secure the cushioning property, the matte surface is apt to be scratched due to spike pins or the like used in the soles of golf shoes and the like. ,
This causes a decrease in wear resistance. On the other hand, if the filling rate of the rubber chips and the binder is increased to reduce the porosity in order to deal with them, the cushioning property originally possessed by using the rubber chips is impaired.

[0004] The present invention has been made in view of such circumstances, and has as its object to satisfy the requirements of both strength such as cushions and abrasion resistance, yet the original rubber chips mat It is an object of the present invention to provide a method for easily producing a laminated rubber chip mat having water permeability.

[0005]

Means for Solving the Problems Laminated rubber chip of the present invention
The method for producing the mat-made mat is as follows: the molding mold is charged with the first rubber chip forming the first rubber layer and the first binder,
The second rubber chip forming the second rubber layer and the second binder having a longer curing time than the first binder are charged and cured and integrated.

In such a manufacturing method,
The porosity in one rubber layer is the porosity in the second rubber layer.
The first rubber layer and the second rubber layer are larger than the first rubber.
Stacking is achieved by the entanglement of the mu-tip and the second rubber tip.
It is good to be embodied. The porosity of the first rubber layer is 20.
~ 46%, the porosity of the second rubber layer is 10 ~ 32%.
Is preferred. Furthermore, as a rubber chip as described above
It is preferable to use fibrous rubber chips.

[0007]

When the second rubber chip and the second binder are charged after charging the first rubber chip and the first binder, the first
The second rubber tip is the first because the binder cures faster.
It is suppressed that the rubber layer gets into the inside of the rubber layer to make it uniform. On the other hand, by the time the first rubber layer is cured, the second rubber chip has entered the surface layer portion of the first rubber layer and cured in such a state. Therefore, the first rubber layer and the second rubber layer are
The first rubber chip and the second rubber chip are laminated and integrated with each other in an intertwined state.

[0008] The laminated rubber chip matrix thus obtained
If the porosity of the first rubber layer is large,
When the floor layer is used as the floor layer, click on the mat.
Option is added. On the other hand, the second rubber layer has a small porosity.
Therefore, the laminated rubber chip mat has abrasion resistance.
To be done. Also, each rubber made by hardening the rubber chip with a binder.
The layer has water permeability, and is composed of the first rubber layer and the second rubber layer.
As described above, the joining is performed on the first rubber layer and the second rubber layer.
The rubber chips in the
Therefore, in the laminated rubber chip mat, the rubber
The original water permeability of the chip mat is secured.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a rubber chip mat having a two-layer structure in which a first rubber layer 1 and a second rubber layer 2 having a different porosity from the first rubber layer 1 are laminated. The first rubber layer 1 has a porosity of 32.
It is used on the floor side in order to secure the cushioning property in the laminated rubber chip mat in an amount of up to 46 vol%. On the other hand, the second rubber layer 2 has a porosity of 18 to 32 vol%,
It is used on the surface side to ensure wear resistance in a laminated rubber chip mat. Generally, from the viewpoint of cushioning property, the higher the porosity, the better. However, the porosity is preferably less than 46 vol% in order to secure a certain level of strength. On the other hand, the porosity is 3 in order to secure wear resistance.
It is preferably less than 2 vol%, and particularly preferably less than 23 vol% with respect to scratch wear due to spike pins.

The first rubber layer 1 and the second rubber layer 2 are integrated by entwining the rubber chips constituting each rubber layer with the binder attached to the surface of the rubber chips. FIG. 2 shows A of the joint portion 3 between the first rubber layer and the second rubber layer.
The cross-sectional enlarged view of a part is shown. The connection portion 3, and is the first rubber chips 4 a state where the second rubber chips 5 forming the (stippled area) and the second rubber layer (hatched portion) is mingled to form a first rubber layer. 6 is a binder attached to the surface of the rubber chip. When the first rubber layer and the second rubber layer are bonded and integrated via another binder layer, the binder layer serves as a film, and the water permeability of the rubber chip mat is likely to be impaired. However, in the rubber chip mat of the present invention, in which the binder layer is not provided and the rubber chips having the binder adhered to the surface are integrated by being entangled with each other, the gap between the rubber chips becomes a space to maintain water permeability.

The rubber chips forming the first rubber layer 1 and the second rubber layer 2 are made of waste material of a rubber molded product such as an old tire crushed into a claw-like shape or a granular shape, a rubber powder produced by buffing after molding, and the like. is there. The size, shape, etc. of the rubber chip used in the present invention are not particularly limited, but a fibrous rubber chip is preferably used. The fibrous rubber chip is more likely to form irregularities on the surface of the rubber layer than the granular rubber chip, and the entanglement between the first rubber layer and the second rubber layer is likely to occur. This means that the bonding strength between the first rubber layer and the second rubber layer is large. In addition, the fibrous rubber chips have more entanglement between the rubber chips and are likely to be bulky. Therefore, the porosity can be adjusted in a wide range by applying pressure and compressing. FIG. 3 shows a case where the granular rubber chips 7 are used in forming the rubber chip mat (see FIG.
(A)) and the case where the fibrous rubber tip 9 is used (FIG. 3 (b)) are enlarged views. In FIG. 3, 8 and 10 are binders attached to the surfaces of the rubber chips, and 11 is a gap between the rubber chips, that is, a void in the rubber mat.

The fibrous rubber chip used in the present invention has a length of 5 to 30 mm, a diameter of 0.5 to 3.0 mm,
Particularly, those having a length of about 15 mm and a diameter of about 1.0 mm are preferable. For example, a rubber chip which is a buff powder of a tread rubber produced during the manufacture of a retreaded tire, a rubber chip 13 obtained by slitting a rubber sheet 12 as shown in FIG. 4 (a) into a wedge shape, or an extrusion as shown in FIG. 4 (b). A rubber chip 15 obtained by cutting the string-shaped rubber 14 extruded from the machine is preferably used.

[0013] The first rubber chips 4 constituting the first rubber layer and the second rubber chips 5 forming the second rubber layer may be a same type, or they may be heterologous. As the binder used in the present invention, a binder having a high affinity with a rubber chip, for example, a urethane-based, epoxy-based or rubber-based binder is used. When a binder having a low affinity with the rubber chips is used, the binder often enters the gap between the rubber chips rather than covering the surface of the rubber chips, which may impair the water permeability of the mat. The binder amount is appropriately selected depending on the porosity of the rubber layer and the rubber content.
Rubber chip (weight ratio) value is 5/100 to 30/100
It is preferably about 7/100 to 20/100.
Used for the first binder used for the first rubber layer and the second rubber layer
The second binder may be of the same type or of a different type. However, in the present invention,
As the binder, one that has a shorter curing time than the second binder
To use.

Next, the laminated rubber chip mat as described above is used.
A method of manufacturing the sheet will be described with reference to FIG. The mold 17, the first rubber layer component 18 barrels first rubber chips and the first binder charge (FIG. 5 (a)), a and a temporary hold by a press machine 19 first rubber layer 20 in a semi-cured state Create (Fig. 5 (b)). Then, this on the first rubber layer 20 in a semi-cured state, charged a second rubber layer component 21 barrels second rubber chips and the second binder (Fig. 5
(B)). Then, it is pressed by the upper mold 22 and cured to integrate the first rubber layer 20 and the second rubber layer 23 (FIG. 5).
(C)) .

For example , as a first binder, TP1221 manufactured by Dainippon Ink and Chemicals, in which active A is added, is used, and this is mixed with a first rubber chip to form a molding mold 17.
Then, using TP1221 or TP1404 manufactured by Dainippon Ink and Chemical Co., Inc. (the curing time is about twice as long as that of the first binder) as the second binder, a mixture of this and the second rubber chip is charged.

In such a manufacturing method, a semi-cured state
The surface of the first rubber layer 20 of
It is uneven. On the other hand, the first rubber layer 2 in a semi-cured state
0, the second rubber chip which is the second rubber layer constituent component 21.
And even when the second binder is charged, these rubber chips
The fact that it penetrates into the inside of the first rubber layer 21 and is diffused
Absent. Therefore, the second rubber chip and the second rubber chip of the second rubber layer 23 are
The two binders are the first rubber chip and the first rubber chip on the surface of the first rubber layer 20.
And the first binder's unevenness, and hardens in the entangled state
Unify. The integration by such a method is the first rubber
There is a binder layer or the like between the layer 20 and the second rubber layer 23.
Since it does not exist, the water permeability of the rubber chip mat will be impaired.
And not.

[0017] According to such a manufacturing method, in the boundary portion between the first rubber layer 20 and the second rubber layer 23, since the uniform by stirring action of the second rubber chips is performed, the first rubber layer 20 The second rubber layer 23 and the second rubber layer 23 form a joint portion composed of a rubber layer having an average porosity. With this joint,
A mat having a bonding strength greater than that of the mat in which the first rubber layer and the second rubber layer are bonded via the binder layer can be obtained. Moreover, it has the original water permeability of the mat made from rubber chips.

In the above manufacturing method, the porosity of each rubber layer can be adjusted by adjusting the amount of rubber chips and the amount of binder filled in the mold. For example, when forming a rubber layer having a size of 250 mm × 250 mm × 250 mm, if the rubber chips 1280 g and the binder 128 g are filled, the filling rate of the rubber chips and the binder becomes 82 vol% (the specific gravity of the rubber is about 1.1), and the voids A rubber layer having a rate of 18 vol% is formed.

Further, in the above-mentioned examples, the first rubber layer and the second rubber layer both had a single-layer structure composed of the same constituent components, but in each layer, the production method of the present invention was made without a binder layer. It may have a multilayer structure composed of rubber layers laminated and integrated by the joining method according to the above.

[0020]

According to the manufacturing method of the present invention , the first
Rubber layer and second rubber layer, can create a product layer rubber chips mat laminated integrated by entanglement between the first rubber chips and the second rubber tip. In the above manufacturing method,
Since the rubber layer has a large porosity, it has excellent cushioning properties.
A layered rubber chip mat is obtained. Furthermore, the second rubber layer
The low porosity gives the mat excellent abrasion resistance.
Can be Therefore, the product of such a manufacturing method
Layer the rubber chip mat so that the first rubber layer is on the floor side
Cushioning and wear resistance suitable for competition facilities
It is possible to lay a mat having strength such as property.

Then, the first rubber layer and the second rubber layer are joined.
The first rubber chip without a binder layer
Stacked and integrated by entanglement with the second rubber chip
Keeps water permeability by using rubber tip
Water is collected on the mat surface even if it rains.
Never. In addition, use fibrous rubber chips.
And increase the degree of entanglement, and increase the strength of the joint.
Since the degree of improvement is improved, the joint interface will not be destroyed even if it is used for a long time.
It rarely happens.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a laminated rubber chip mat of the present invention.

FIG. 2 is an enlarged cross-sectional view of a portion A of the rubber chip mat shown in FIG.

FIG. 3 is a diagram showing an internal structure of a rubber layer using granular rubber chips and an internal structure of a rubber layer using fibrous rubber chips.

FIG. 4 is a diagram for explaining the production of a fibrous rubber chip.

FIG. 5 is a diagram for explaining a method for manufacturing a laminated rubber chip mat according to the present invention.

[Description of Reference Signs ] 17 Molding Mold 18 First Rubber Layer Constituents (First Rubber Chip and First Bar)
Indah 20 First rubber layer 21 Second rubber layer constituent components (second rubber chip and second rubber layer )
Indah) 23 Second rubber layer

Claims (4)

(57) [Claims] 1. A first rubber layer is formed on a molding mold.
After charging 1 rubber chip and 1st binder, 2nd rubber
Harder than the second rubber tip and the first binder that form the layer
Incorporate a second binder with a long curing time, and cure and integrate
A method for manufacturing a mat made of laminated rubber chips, characterized in that
Law. 2. The porosity of the first rubber layer is the same as that of the first rubber layer.
The second rubber layer has a porosity higher than that of the first rubber.
The first rubber chip and the second rubber layer,
By being entangled with the second rubber chip, it is laminated and integrated.
The laminated rubber chip according to claim 1, wherein
Method of manufacturing mat made of steel. 3. The porosity of the first rubber layer is 20 to 46.
%, The porosity of the second rubber layer is 10 to 32%
Item 3. A method for producing a laminated rubber chip mat according to Item 2. 4. A fibrous rubber chip as the rubber chip
The laminated rubber chip mat according to claim 2 or 3 using
Manufacturing method.