JP2001181443A - Adhesion-preventing agent for kneaded rubber and method for producing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To recycle soot particles by-produced from waste tires in an incinerator. SOLUTION: Soot particles which are collected from the smoke of an incinerator for waste rubbers, have an average particle diameter of <=100 μm and contains zinc flower are added in an amount of 2 to 30 wt.% per 100 wt.% of water. The soot particles may also be added to the water together with an inorganic powder material and/or a non-inorganic powder material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adhesive for kneaded rubber, and more particularly, it is applied to the surface of a rubber sheet made of kneaded rubber so that the rubber sheets do not adhere to each other when the rubber sheets are stacked and arranged. In particular, the present invention relates to a dustproofing agent for kneaded rubber which aims to utilize dust generated when incinerating waste rubber.

[0002]

2. Description of the Related Art Conventionally, in order to prevent air pollution from the viewpoint of environmental measures, smoke exhausted from an incinerator is usually passed through a dust collector such as an electric dust collector or a bag filter to collect dust, and the exhaust gas is cleaned. On the other hand, dust collected by dust collectors is disposed of as landfill, etc. as industrial waste.

[0003] Waste tires are treated in the same manner as above.
As shown in FIG. 3, the waste tire 1 is incinerated in an incinerator 2, a dust collector 4 is interposed in a chimney 3 protruding from the upper end of the incinerator 2, and smoke generated during incineration is passed through the dust collector 4. ing. The dust 5 collected by the dust collector 4 is collected in a case 6, transported to a landfill, and subjected to landfill processing.

[0004]

Recently, with the rapid spread of automobiles, the number of discarded tires to be incinerated has increased rapidly, and the amount of dust has also increased in accordance with the increase. There is an urgent need to recycle soot and dust.

In view of the above problems, the present inventors have conducted intensive research and development on the recycling of dust, and the dust generated when incinerating waste rubber such as waste tires contains a rubber composition. Focusing on the fact that it is, research was conducted to achieve recycling as a rubber-related material, and it was found that it could be recycled as an adhesive for kneaded rubber of the present invention.

[0006]

That is, the present invention relates to a method for removing dust containing zinc white and carbon having an average particle diameter of 100 μm or less from exhaust gas from an incinerator and containing 100% by weight of water with respect to 100% by weight of water.
The present invention provides an adhesive for kneaded rubber containing up to 30% by weight.

[0007] As a method for producing the above-mentioned adhesive for kneaded rubber, for example, smoke exhausted from a chimney of a waste rubber incinerator is collected by a dust collector, and the obtained dust is collected with respect to 100% by weight of water. It is produced by adding 1 to 30% by weight and stirring to disperse dust in water.

[0008] The adhesive for kneaded rubber is applied to the surface of a rubber sheet made of kneaded rubber to prevent the laminated rubber sheets from adhering to each other and to cool the kneaded rubber. The adhesive for kneaded rubber generally has a composition in which 2 to 30% by weight of an anti-wear powder made of an inorganic powder or a non-inorganic powder is added to 100% by weight of water. The above-mentioned inorganic powder or non-inorganic powder may be kneaded into the rubber during the processing in the next step, so that even if kneaded, the rubber physical properties are not significantly reduced, and the particle size is small. Even if it is kneaded in rubber, it is required that it has no effect on physical properties and has a reinforcing property.

The dust is an ultrafine powder having an average particle size of 100 μm or less and usually 30 μm to 1 μm. In addition, since zinc dust contained in the rubber composition to be processed is a main component, the dust is There is no problem even if it is kneaded into the rubber, and it is suitable as a powder for an anti-adhesive added to water. Therefore, dust can be recycled as a powder for an anti-adhesive agent, and accordingly, the amount of industrial waste to be landfilled can be reduced, which contributes to environmental measures. In addition, the use of dust can significantly reduce the cost of the adhesive for kneaded rubber. Dust has the same level of reinforcing properties as calcium carbonate conventionally used as an anti-adhesive agent.

The incineration ash collected in the lower part of the incinerator has an average particle size exceeding 100 μm, and is too large to be used as an anti-adhesive agent. The incineration ash also contains a metal component. Due to the necessity of separation work, only dust collected from flue gas is used in the present invention, and incineration ash is excluded.

In the case where only dust is added to water, the amount of the dust is set to 2 to 30% by weight. This is because the rubber sheet was adhered to the surface of the rubber sheet and laminated, so that the rubber sheet could not function as an adhesion inhibitor. On the other hand, if it exceeds 30% by weight, the flowability deteriorates and the feed pipe of the anti-adhesive agent is clogged and cannot be used.
It is specified below.

As the dust, the dust of a waste tire is most preferably used. This dust contains 5 to 15% by weight of an organic component, 10 to 30% by weight of carbon, and 50 to 7% by weight of an inorganic component.
0% by weight, 60-65% by weight of zinc white in the inorganic component
It has become. In this way, the main component is sulfite that does not reduce the rubber properties even when kneaded into the rubber,
Since the amount of carbon is large and zinc white and carbon occupy 80 to 85% by weight, dust from waste tires is preferably used.

As described above, only dust may be added to water to form an adhesive for kneaded rubber. However, an inorganic powder and / or a non-inorganic powder may be added to water together with dust to prevent adhesion to kneaded rubber. It may be. In this case, the dust is contained in an amount of 1 to 30% by weight with respect to 100% by weight of water, and the inorganic powder and / or the non-inorganic powder is contained in an amount of 1% by weight or more,
The total of the dust and the inorganic powder is 2 to 30% by weight with respect to 100% by weight of water. Examples of the inorganic powder used together with the dust include calcium carbonate and hard clay. These inorganic powders have been conventionally used as powders for anti-adhesive agents, and can be used together with dust to promote the anti-adhesion effect.However, from the viewpoint of cost, it is necessary to increase the amount of dust as a small amount. Is preferred, so
It is preferable that the blending amount of these powders is about 1% by weight. As the non-inorganic powder that can be used, a long-chain aliphatic carboxylate or the like is suitably used, and specifically, GY-110F (long-chain aliphatic carboxylate, metal Salt 5-15%), GY-180 (long chain aliphatic carboxylate, special anionic surfactant 3-6)
%), GY-100 (long-chain aliphatic carboxylate, metal salt 2-20%) and the like.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail. FIG. 1 schematically shows a production line for an anti-adhesive agent for kneaded rubber according to the present invention, wherein an exhaust gas purifying device 2a and an exhaust gas boiler 2b are installed above an incinerator 2 for waste tires 1 and connected to the exhaust gas boiler 2a. An electric precipitator 4 is interposed in the chimney 3 and a dust extraction pipe 10 is connected to a bottom surface of the electric precipitator 4. An accumulator 11, a blower fan 12, and a cyclone 13 are sequentially provided in the dust extraction pipe 10, and a container 14 is disposed at a discharge port of the cyclone 13. The dust is removed from the pipe 10 by the accumulation 11.
After the dust is blown by the blower fan 12 to cool and dry the dust, the dust is collected by the cyclone 13 and then the container 1
4, the dried dust is discharged and stored in the content 14.

As the electric precipitator 4, a Hurler type electric precipitator (manufactured by Nakanishi Kogyo) is preferably used. However, the type of the electric precipitator is not limited, and a bag filter may be used instead of the electric precipitator. Good.

The container 14 is transported to a kneaded rubber manufacturing apparatus 20 by a forklift, and the container 14 is mounted on a base 21. An openable / closable discharge port 14 a is provided on the bottom surface of the container 14, and the discharge port 14 a is opened to communicate with a pipe 22 which is vertically provided from a base 21. The pipe 2
2, a discharge amount control valve 23 is provided, and the lower end of the pipe 22 is opened to the container 25. The discharge amount control valve 23 is manually adjusted or automatically adjusted, and is opened and closed and the opening amount is adjusted so that a required amount of dust 5 can be added to the container 25. A predetermined amount of water 30 is stored in the container 25, and a stirrer 27 operated by a motor 26 is charged into the container 25. Needless to say, a predetermined amount of water 30 may be supplied to the container 25 through a pipe connected to the water storage tank.

In the above facility, the flue gas generated when the waste tire 1 is incinerated in the incinerator 2 flows to the chimney 3 and is collected by the electric precipitator 4, and the dust is collected from the electric precipitator 4 by the pipe 1.
Cyclone 1 after being sucked in and blow-dried
At 3, the dust is collected and collected in the container 14.

The results of analysis of the components of the dried dust 5 stored in the container 14 are shown in Table 1 below, and the main component was zinc white. In addition, the particle size is up to 100μ
m, the minimum is about 0.1 μm, and the average particle size is 23.03.
It was 2 μm. Usually, the carbon powder contained in the rubber composition is about 50 μm, and the particle size of the dust 5 is smaller than that of the carbon powder.

[0019]

[Table 1]  Organic component 11.7 (% by weight) Carbon 20.7 Inorganic component 67.6 ZnO 62.1 Al2O3 0.51 SiO2 1.36 Fe2O3 2.18 Ca 1.44Total sulfur 1.58 

The dust 5 is charged into a container 25, stirred with water 30 stored in advance, and dispersed in water to form an adhesive for kneaded rubber as shown in FIG. 31 is generated. The mixing ratio of the dust 5 and the water 30 is as follows:
When only dust is mixed with water, the content is 2 to 30% by weight with respect to 100% by weight of water.

(Experimental Example 1) Only dust collected from smoke generated when incinerating waste tires according to the method described in the above embodiment is mixed with water, and the amount of dust mixed is shown in Table 2 below. The anti-adhesive was prepared by changing as shown. This anti-adhesive agent was applied to the surface of the kneaded rubber sheet, the kneaded rubber sheet was laminated thereon, and after standing for 24 hours, the rubber sheet was peeled off to test the anti-adhesion effect. In the display of the anti-adhesion effect in Table 2, x indicates that the sheet was completely adhered and did not have an anti-adhesion effect, Δ indicates that the adhesion of the sheet was partially generated, and ○ indicates This indicates that the sheet was not adhered and had an anti-adhesion effect. Further,-indicates that the test could not be performed due to the clogging of the pipe by the anti-adhesive agent.

[0022]

[Table 2]  Dust concentration (wt%) 0.1 0.5 1.0 2.0 5.0 15.0 25.0 35.0Deposition effect × × △ ○ ○ ○ ○ ー

As shown in the above test results, it was confirmed that when dust was mixed in water in an amount of 2% by weight or more, it functioned as an adhesive for kneaded rubber. 1% by weight
It was also confirmed that the required protective effect was not obtained. Further, it was confirmed that when the content exceeded 30% by weight and reached 35% by weight, the piping was clogged and could not be used. From this test result, it was clarified that when only dust was mixed with water, the dust had to be in the range of 2 to 30% by weight.

As described above, the anti-adhesive agent for kneaded rubber of the present invention can be produced by mixing only dust with water.
Conventionally, inorganic powders such as calcium carbonate and hard clay and / or non-inorganic powders such as long-chain aliphatic carboxylate used as powders for the anti-adhesive agent are added to water together with dust to form. The action may be promoted. These inorganic powders and / or non-inorganic powders other than the dust are also charged together with the dust into a container storing water, stirred with a stirrer, dispersed in the water together with the dust, and formed as an adhesive for kneaded rubber. ing.

When the inorganic powder and / or non-inorganic powder is mixed with water together with the above-mentioned dust, the total amount of the dust and the inorganic powder and / or non-inorganic powder is 2 to 2 with respect to water.
It is preferable that the content of the inorganic powder and / or the non-inorganic powder to be added is as small as about 1% by weight, and that the amount of the dust is increased to reduce the cost and increase the consumption of the dust. Preferred from the point.

(Experimental Example 2) Calcium carbonate was used as an inorganic powder and added to water together with dust, the amount of calcium carbonate was kept constant, and the amount of dust was varied to produce an adhesive for kneaded rubber. A test of the anti-adhesion performance similar to that of Experimental Example 1 was performed. The results are shown in Table 3 below.

[0027]

[Table 3]  Calcium carbonate concentration (% by weight) 1.0 1.0 1.0 1.0 Dust concentration (% by weight) 0.1 0.5 1.0 2.0Deposition effect △ △ ○ ○

As shown in Table 3, even if the dust content is 1% by weight, adding 1.0% by weight of calcium carbonate has an anti-adhesion effect, and the addition of calcium carbonate enhances the anti-adhesion effect. Was observed. On the other hand, even if calcium carbonate is blended at 1.0% by weight, if the dust is 0.5% by weight, there is no required anti-adhesion effect. It was confirmed that it was obtained.

(Experimental Example 3) Calcium carbonate was used as an inorganic powder and added to water together with dust, and the mixture weight of both calcium carbonate and dust was changed to produce an adhesive for kneaded rubber. A test of the deposition performance was performed.
The results are shown in Table 4 below.

[0030]

[Table 4] Calcium carbonate concentration (wt%) 0.5 1 3 1 20 20 Dust concentration (wt%) 0.5 0.5 1 3 5 20 Deposition effect × △ ○ ○ ○ −

As shown in Table 4, when the combined amount of calcium carbonate and dust was 25% by weight, the effect of preventing adhesion was observed. However, when it reached 40% by weight, the pipe was clogged and could not be used.

[0032]

As is apparent from the above description, the dust obtained by collecting the smoke exhausted from incinerators such as waste rubber is obtained as follows.
It can be used as an anti-adhesive for kneaded rubber by being mixed with water. As a result, it is possible to effectively recycle dust that has been conventionally landfilled, to reduce the amount of dust that becomes industrial waste, and to obtain an adhesive for kneaded rubber at low cost.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a production line for an adhesive for kneaded rubber according to the present invention.

FIG. 2 is a schematic view showing an adhesion inhibitor for kneaded rubber.

FIG. 3 is a schematic view illustrating a conventional waste tire incineration line.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 waste tire 2 incinerator 4 electric dust collector 5 dust 30 water 31 adhesive for kneaded rubber

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) (C08K 3/00 C08K 3:22) 3:04 B09B 5/00 ZABN 3:22) 3/00 303C F-term (reference) 3K061 NA01 NA05 NA07 NA14 4D004 AA11 BA01 BA10 CB26 CC03 DA03 DA10 DA11 DA20 4J002 AC131 AC141 DA037 DE088 DE106 DE118 DE148 DJ018

Claims (4)

[Claims] 1. An average particle diameter of 10 collected from flue gas of an incinerator.
Dust containing zinc white and carbon having a particle size of 0 μm or less
An adhesive for kneaded rubber containing 2 to 30% by weight based on 0% by weight. 2. An average particle size of 10 collected from flue gas of an incinerator.
Dust containing zinc white and carbon having a particle size of 0 μm or less
1 to 30% by weight with respect to 00% by weight, and 1% by weight or more of inorganic powder and / or non-inorganic powder, and the total of the dust and the inorganic powder is reduced to 100% by weight of water. An adhesive for kneaded rubber in an amount of 2 to 30% by weight. 3. The anti-adhesive agent for kneaded rubber according to claim 1, wherein the dust is collected from smoke exhausted from a waste rubber incinerator. 4. The method for producing an adhesive for kneaded rubber according to any one of claims 1 to 3, wherein exhaust gas discharged from a chimney of the incinerator is collected by a dust collector, A method for producing an adhesive for kneaded rubber, which is obtained by adding 1 to 30% by weight of the obtained dust with respect to 100% by weight of water, stirring and dispersing the dust in water.