JP2007138706A - Porous elastic material made of rubber powder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a long granular panel-like body continuously mass-producible as a plant product by specifying the grain size of rubber powder and urethane-mixing composition in use to facilitate its production steps. <P>SOLUTION: An agitated mixture obtained by adding a one-liquid urethane of 5 to 30 pts.wt. to the rubber powder of 100 pts.wt. crushed into 1 to 3 mm particle grains and agitating and mixing them is dropped onto a conveyor having a surface from which a curing material is easily peeled off. An interval between the conveyor and a doctor knife or a roll coater is adjusted to have predetermined width and thickness. The granular panel-like body with predetermined thickness and width obtained by starting the conveyor is cured by heating. The molded product of the long granular panel-like body is molded by cutting the panel-like body to desired lengths. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention is a novel product in which a granular disk-like body containing powder rubber used as an underlay for parks, kindergartens, nursing home facilities or futsal venues is molded as a desired long molded product by factory production. The present invention relates to a porous elastic material made of powder rubber.

  Conventional powder rubber molded products, especially powder rubber molded products using old tire powder, industrial rubber product scrap powder, color chip powder, etc., are used for construction civil engineering to prevent railway floors (rail sleepers). It is used for elastic rubber such as rubber bands, community plazas, sidewalks, golf courses, tennis courts, indoor use, for barns, elastic mats for horses, etc. This type of conventional powder rubber molding is compressed by high pressure. Since it is a vulcanization molding method, it is a high-density elastic mat. Conventionally, powder rubber porous elastic pavement materials are well known as on-site construction methods in which raw materials are mixed, mixed and cured at the construction site, or factory production methods manufactured by batch production.

   However, in the case of the on-site construction method, in order to perform compounding, mixing, and curing operations, the quality is uniform because machine equipment such as a press machine and vulcanizer cannot be prepared at the construction site, as in a factory. A molded product could not be produced. In addition, a certain amount of area is required at the construction site in consideration of cost, and one day is required for curing. Moreover, when repairing, there was a problem that only partial repair was possible on site.

  In the case of factory production, there are mechanical equipment for blending, mixing and curing operations, so production is easy even in the case of large quantities, but in the factory production, molded products are obtained by batch production method using a press machine. Since this batch method uses a mold frame composed of a lower mold and an upper mold, there is a limit to the size of a molded product, and there is a problem that it is difficult to produce a long sheet of 5 m, for example.

  The present invention has been made in view of the above-mentioned problems, and its purpose is to compensate for the negative side of the on-site construction method, so that it is a sheet-like molded product of the same material, particularly a long sheet-like product. In order to be able to produce a molded product of this product by factory production, the particle size of the powder rubber and the urethane blending composition to be used are specified, the manufacturing process is simplified, and in the factory production, a long granular disk In addition, the present invention provides a porous elastic material made of powder rubber which can be used for mass production of the molded product.

In order to achieve the above object, a porous elastic material made of powder rubber according to the present invention comprises powder rubber having a particle size of 1 to 10 mm and one-component urethane, and has a predetermined width and thickness on a conveyor. The specific gravity is 0.6 to 0.9, which is formed by heat-molding the scale board.

  The porous elastic material made of powder rubber according to the present invention comprises 100 parts by weight of powder rubber having a particle diameter of 1 to 10 mm and 5 to 30 parts by weight of one-component urethane, and has a predetermined width and thickness on the conveyor. The specific gravity is 0.6 to 0.9, which is formed by heating and molding the long plate-like body.

The conveyor is preferably a conveyor on which a nonwoven fabric is placed.

    In the present invention, it is preferable that powder rubber is a main raw material, and a binder is mixed using a resin and an inorganic aggregate.

  Furthermore, antibacterial properties can be imparted to the granular disk by mixing an antibacterial agent with the binder mixed with the powder rubber of the present invention.

As the powder rubber used in the present invention, those obtained by pulverizing vulcanized rubber, used tires, those obtained by pulverizing industrial rubber product waste with a pulverizer, and powder rubbers colored on the surface of the powder rubber are used.
The particle size of the powder rubber is preferably in the range of 1 to 10 mm.

As the one-component urethane used in the present invention, an ordinary urethane raw material is used.
The polyisocyanate used in the urethane reaction of the present invention includes not only a polyisocyanate compound but also a polyisocyanate and a polyester polyol or a polyether polyol.
Examples of the polyisocyanate compound include tetramethylene diisocyanate, pentamethylene diisocyanate, hexamethylene diisocyanate, octamethylene diisocyanate, dipropyl ether 3,3′-diisocyanate, dicyclohexylmethane-4,4′-diisocyanate,
1,4-cyclohexylene diisocyanate, isophorone diisocyanate, diphenylmethane-4,4′-diisocyanate, various known modified diphenylmethane-4,4′-diisocyanate, metaphenylene diisocyanate, 2,4-tolylene diisocyanate, 2,6-triisocyanate Range isocyanate and the like, phenylmethane-4,4′-diisocyanate and the like, and diphenylmethane-4,4-diisocyanate are used alone or in combination.

The polyester polyol can be obtained by a usual method using a combination of a dicarboxylic acid and a polyol. The polyether polyol can be obtained by a usual method.
The active hydrogen compound used in the present invention is a polyamine and / or a polyol. Examples of the polyamine include ethylenediamine, tetramethylenediamine, hexamethylenediamine, p-phenylenediamine, 3,3′-dichloro-4,4′-diaminodiphenylmethane, and the like. Is used.
Examples of the catalyst include known amines and organometallic compounds (such as tin and lead).
The present invention uses 5 to 30 parts by weight of these urethane mixtures with respect to 100 parts by weight of powder rubber. If the urethane mixture is 5 parts or less, the powder rubber cannot be hardened and is difficult to disperse. Moreover, when the urethane mixture is 30 parts by weight or more, the cost increases.

The present invention specifies the particle size of the powder rubber and the urethane blend composition to be used, simplifies the manufacturing process, and provides a long granular disk-like body that can be continuously mass-produced as a factory product, etc. The effect of.

  In the present invention, one-component urethane is added to granular powder rubber and stirred and mixed. Before the stirred mixture obtained by stirring and mixing is cured, the stirred mixture is dropped onto a conveyor to obtain a predetermined thickness. A long granular rubber body by forming a long granular disk having a desired width and a desired length, and continuously heating the long granular disk in a heating opening and curing it. Mold the elastic material.

  The porous elastic floor material made of powder rubber according to the present invention is prepared by adding 5 to 30 parts by weight of one-component urethane to 100 parts by weight of powder rubber and stirring and mixing, before the stirring mixture obtained by stirring and mixing is cured. The stirring mixture is dropped onto a conveyor having a surface that is easy to peel off from the cured product, and a device for adjusting the thickness of a doctor knife or the like provided on the conveyor is set at a desired interval, and then the conveyor is started. The stirring mixture on the conveyor is adjusted and formed into a granular disk-like body having a predetermined thickness and width, and the stirring mixture is continuously placed in a heating opening and heated to be cured, thereby obtaining a desired length. A long powder rubber porous elastic flooring material having the following is molded.

  As the powder rubber used in the present invention, vulcanized rubber powdered, old tires, industrial rubber product waste pulverized by a pulverizer, and powder rubber colored in color on the surface of the powder rubber are used. . The particle size of the powder rubber is preferably in the range of 1 to 10 mm.

In the present invention, it is preferable that powder rubber is a main raw material, and a binder is mixed by using a resin such as plastic or glass and an inorganic aggregate in combination.
Moreover, it is preferable to mix an antimicrobial agent in the binder mixed with powder rubber.

As the one-component urethane used in the present invention, an ordinary urethane raw material is used.
As the polyisocyanate used in the urethane reaction of the present invention, not only a polyisocyanate compound but also a polyisocyanate and a polyester polyol or a polyether polyol are used.

  The mixture of powder rubber and urethane used in the present invention is uniformly mixed and stirred by a mixer, and the thickness is made uniform by a doctor knife provided on a conveyor in order to make the thickness of the molded product uniform. At this time, in order to make it easy for the stirred mixture of powder rubber and urethane to be peeled off from the conveyor surface, it is preferably a belt conveyor which is subjected to fluorine-based or silicon-based treatment or a release paper or non-woven fabric placed by a pin tenter.

  In the curing operation, the molded product is cured by continuously placing it in a heating oven having a line length of 10 to 20 m. The curing temperature (set temperature) in this case is preferably 120 to 160 ° C., and the line speed is preferably in the range of 0.5 m / min to 3 m / min (dryer tank).

(The invention's effect)? ? ? ?
In the porous elastic material made of powder rubber that becomes a long granular disk produced by the present invention, the physical properties such as the tensile strength, tear strength and the like of the stirring mixture are firmly adhered between the powder rubber particles. We are satisfied with the product and offer a porous elastic floor material made of powdered rubber that is the same material as the molded product formed by the on-site construction method.
The long molded product produced by this factory is light and has a specific gravity of 0.6 to 0.9. Therefore, it is easier to transport than ordinary rubber sheets, and when the molded product produced by the factory is laid as a flooring. Since it can be performed with an epoxy-based or urethane-based adhesive or can be fixed with an anchor bolt, construction and maintenance are easy, so that repair can be facilitated, and partial repair can be simplified.
Moreover, since it is a recycled product, it is inexpensive and can be provided at a lower cost than a general color rubber rug or black rubber plate.

Production of Black Cushion Mat FIG. 1 is a schematic view showing the production line of Example 1, and a nonwoven fabric 2 is provided on the surface of the conveyor 1. Then, 30 kg of old tire powder ground to 1 to 3 mm was used, 7 kg of one-component urethane was added, and the mixture was stirred and mixed. The stirring mixture 3 is dropped from the hopper 4 onto the nonwoven fabric 2 on the surface of the conveyor 1 having a predetermined width, and the distance between the conveyor 1, the doctor knife 5 and the rolling roller 6 is set to a predetermined thickness. By setting and starting the conveyor 1 through this interval, the stirring mixture 3 having a predetermined width and thickness is passed through the heating oven 7 having a line length of 18 m on the conveyor 1 at a speed of 1 m / min. Heated at 155 ° C. for 15 minutes to be cured, and the nonwoven fabric 2 was wound up and collected at the exit side of the heating oven 7, and a long cushion mat having a thickness of 10 mm, 1 m width and 5 m length was manufactured by the side trim cutter 8 and the cutter 9. .

The cushion mat manufactured in Example 1 realized that a long sheet of powder rubber product was provided by factory production. The cushion mat manufactured to a thickness of 10 mm can be cut into a sheet having a thickness of 5 mm by a slicer. In addition, the cushion mat has hardened particles of about 1 to 10 mm, so it is harder to slide than a normal rubber plate, and since the chip is hardened, it has a porosity of 40% and has an appropriate elasticity. , Providing factory-produced long floor materials that are water-permeable and have a high level of safety, such as being able to walk with peace of mind without rain even after rain.
Moreover, the cushion mat manufactured in Example 1 can be provided with an anti-slip function without impairing elasticity and water permeability by mixing aggregates, so that walking safety can be further enhanced.

Production of Color Cushion Mat In this Example 2, the production line of Example 1 is used. 30 kg of color powder rubber crushed to 1 to 10 mm was used, and 7 kg of one-component urethane was stirred and mixed. The stirring mixture 3 is dropped onto the conveyor 1, and the width and interval of the doctor knife 5 and the spreading roller are set to a predetermined width and thickness interval, and the stirring mixture 3 is passed therebetween, and then the conveyor 1 is heated to the heating oven 7. Through the inside, it was heated and cured at a temperature of 145 to 155 ° C. for 15 minutes, and cut to a desired length to produce a long cushion mat.

  The cushion mat using the color powder rubber formed in Example 2 uses a chip colored with color EPDM powder rubber, so that it does not change color even when used for a long period of time. Various combinations are possible, and if it is cut to 5 m or 1 m, a bright mat can be laid by combining various colors. Further, since the color can be easily applied to the surface of the powder rubber, there are color variations other than the standard colors, and a sheet with bright and vivid colors can be easily provided by changing the colors.

It is a schematic diagram of the manufacturing line of Example 1 of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Conveyor 2 Nonwoven fabric 3 Stirring mixture 4 Hopper 5 Doctor knife 6 Rolling roller 7 Heating oven 8 Side trim cutter 9 Cutter

Claims (6)

It consists of powder rubber having a particle size of 1 to 10 mm and one-component urethane, and is heat-molded into a long disk-shaped body having a predetermined width and thickness on a conveyor, with a specific gravity of 0.6 to 0.9. Porous elastic material made of powder rubber. Specific gravity consisting of 100 parts by weight of powder rubber having a particle diameter of 1 to 10 mm and 5 to 30 parts by weight of one-component urethane, and heat-molded into a long plate-like body having a predetermined width and thickness on a conveyor. 0.6 to 0.9 powder rubber porous elastic material. The porous elastic material made of powder rubber according to claim 1 or 2, wherein the conveyor is a conveyor on which a nonwoven fabric is placed. 4. The porous elastic material made of powder rubber according to claim 1, wherein powder rubber is a main raw material, and a binder is mixed with resin or inorganic aggregate. The porous elastic material made of powder rubber according to claim 1, 2, 3, or 4, wherein an antibacterial agent is mixed in a binder mixed with powder rubber. 6. The porous elastic material made of powder rubber according to claim 1, wherein the powder rubber comprises old tire powder, industrial rubber product waste powder and color chip powder.

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