KR102676340B1 - Apparatus and method for preparing elastomer composite - Google Patents

Abstract

The present invention relates to an elastomer composite manufacturing device capable of improving crack resistance and wear resistance and a method for manufacturing an elastomer composite using the same.

Description

Elastomer composite manufacturing apparatus and elastomer composite manufacturing method {APPARATUS AND METHOD FOR PREPARING ELASTOMER COMPOSITE}

The present invention relates to an elastomer composite manufacturing device capable of improving crack resistance and wear resistance and a method for manufacturing an elastomer composite using the same.

A variety of commercially used rubber products are made of natural or synthetic elastomers containing particulate fillers such as carbon black or silica.

Carbon black used as particulate filler is classified into various grades depending on the surface area per unit weight (specific surface area, N ₂ SA) and structure (OAN). In general, when carbon black with a large specific surface area is used, the mechanical properties of the rubber composite tend to improve, but the dispersibility is reduced, so when mixing carbon black with a specific surface area above a certain level, the physical properties of the rubber product do not meet expectations. there is.

In addition, even if better macrodispersion is achieved by prolonged and vigorous mixing, damage may be inflicted on natural rubber, which is vulnerable to mechanical/thermal degradation. Due to these problems, the field of elastomer composite technology has long required development of ways to improve the dispersibility of particulate fillers in elastomer composites.

Additionally, antioxidants are added to the elastomer composite to prevent decomposition of the rubber by suppressing radical activity generated by mechanical/thermal energy.

At this time, in the existing elastomer composite manufacturing method, the solid antioxidant is simply mixed with the elastomer and the particulate filler. However, in this case, the antioxidant is not sufficiently dispersed in the elastomer composite, which significantly improves the crack resistance and wear resistance of the elastomer composite. There was a problem with not being able to contribute.

Under the above-described technical background, the present invention provides an elastomer composite manufacturing device capable of improving the crack resistance and wear resistance of the manufactured elastomer composite by improving the dispersibility of the antioxidant in the elastomer composite, and a method for manufacturing an elastomer using the manufacturing device. The purpose is to provide a method.

In addition, the present invention aims to provide an elastomer composite manufacturing device capable of improving the dispersibility of various additives used in the production of an elastomer composite as well as antioxidants in an elastomer composite, and a method of manufacturing an elastomer using the manufacturing device. Do it as

The objects of the present invention are not limited to the objects mentioned above, and other objects and advantages of the present invention that are not mentioned can be understood by the following description and will be more clearly understood by the examples of the present invention. Additionally, it will be readily apparent that the objects and advantages of the present invention can be realized by the means and combinations thereof indicated in the patent claims.

According to one aspect of the present invention, a coagulation reactor in which a particulate slurry and an elastomer latex are supplied to produce a coagulation mixture, a dehydration extruder located downstream of the coagulation reactor for dehydrating and compressing the coagulation mixture, and an antioxidant into the dehydration extruder. An elastomer composite manufacturing apparatus including an additive feeder that supplies may be provided.

In addition, according to another aspect of the present invention, a coagulation reactor in which the fine particle slurry and elastomer latex are supplied to produce a coagulation mixture, a dehydration extruder located downstream of the coagulation reactor for dehydrating and compressing the coagulation mixture, and the dehydration extruder An elastomer composite manufacturing apparatus may be provided, which is located downstream and includes a dry extruder that dries the coagulated mixture dehydrated and compressed in the dehydration extruder, and an additive feeder that supplies an antioxidant into the dry extruder.

In addition, according to another aspect of the present invention, a) preparing a particulate slurry in which particulate fillers are dispersed, b) preparing an elastomer latex comprising an elastomer, c) introducing the particulate slurry and the particulate slurry into a mixing zone of a coagulation reactor. A method for producing an elastomer composite comprising the steps of supplying the elastomer latex to produce a coagulation mixture, d) supplying the coagulation mixture to a dehydration extruder to dehydrate it, and e) mixing the dehydrated coagulation mixture with an antioxidant. can be provided.

According to the present invention, when the coagulation mixture has a predetermined moisture content or less in the step of dehydrating and compressing the coagulation mixture prepared by co-coagulating the fine particle slurry and elastomer latex supplied to the coagulation reactor, the liquid phase in which the solid antioxidant is dissolved By spraying the antioxidant at high pressure and mixing it with the coagulation mixture, the dispersibility of the antioxidant in the elastomer composite can be improved.

Accordingly, it is possible to suppress the activation of radicals by mechanical/thermal energy during the dehydration compression and subsequent drying processes, thereby preventing decomposition of the elastomer composite, thereby making it possible to manufacture rubber products with improved crack resistance and wear resistance. .

In addition, according to the present invention, there is an advantage that dispersibility in the elastomer composite can be further improved by adding antioxidants as well as various additives used in the production of the elastomer composite when the coagulation mixture has a predetermined moisture content or less. .

In addition to the above-described effects, specific effects of the present invention are described below while explaining specific details for carrying out the invention.

Figure 1 schematically shows the configuration of an elastomer composite manufacturing apparatus according to an embodiment of the present invention.
FIG. 2 schematically shows an example of a dehydration extruder used in the elastomer composite manufacturing apparatus shown in FIG. 1.
Figure 3 schematically shows the configuration of an elastomer composite manufacturing apparatus according to another embodiment of the present invention.
FIG. 4 schematically shows an example of a dehydration extruder used in the elastomer composite manufacturing apparatus shown in FIG. 3.

The above-described objects, features, and advantages will be described in detail later with reference to the attached drawings, so that those skilled in the art will be able to easily implement the technical idea of the present invention. In describing the present invention, if it is determined that a detailed description of known technologies related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description will be omitted.

Hereinafter, the arrangement of any component upstream (or downstream) of a component means that any component is placed immediately upstream (or downstream) of the component, as well as being placed downstream from the component placed upstream. It should be understood that other components may be interposed between the components.

In addition, when a component is described as being connected, combined, or connected to another component, the components are directly connected to each other, another component is interposed between the two components, or each component is connected through the other component. , it should be understood that it may be combined or connected.

Hereinafter, an elastomer composite manufacturing apparatus and an elastomer composite manufacturing method according to some embodiments of the present invention will be described with reference to the drawings attached hereto.

Figure 1 schematically shows the configuration of an elastomer composite manufacturing apparatus according to an embodiment of the present invention, and Figure 2 schematically shows an embodiment of a dehydration extruder used in the elastomer composite manufacturing apparatus shown in Figure 1. .

Referring to Figures 1 and 2, an elastomer composite manufacturing apparatus according to an embodiment of the present invention includes a coagulation reactor 120, a dehydration extruder 130, and an additive feeder 140.

The coagulation reactor 120 includes a mixing zone where the particulate slurry and elastomer latex are supplied under pressure to the inlet side of the coagulation reactor 120 to produce a coagulation mixture. Here, the particulate slurry and elastomer latex are continuously supplied to the coagulation reactor 120, and within the coagulation reactor 120, the particulate slurry and elastomer latex may flow at a constant flow and be discharged to the outlet side of the coagulation reactor 120.

In one embodiment, the particulate slurry and elastomer latex may be co-coagulated by high-pressure spraying, which is supplied under pressure into the coagulation reactor 120 to produce a coagulation mixture. In this case, it is possible to induce co-coagulation of the particulate slurry and elastomer latex without using a coagulant by spraying the particulate slurry and elastomer latex at high pressure into the mixing zone in the coagulation reactor 120. Additionally, in another embodiment, the particulate slurry and the elastomer latex may be co-coagulated by a coagulant simultaneously supplied into the coagulation reactor 120 to produce a coagulation mixture.

The coagulation mixture can be obtained as a masterbatch crumb in the form of worms or globules. At this time, the master batch crumb may contain, for example, about 50 wt% or more and about 85 wt% or less of moisture. Additionally, preferably, in the master batch crumb the particulates can be evenly dispersed in the coagulated elastomer latex.

The coagulation reactor 120 may be supplied with particulate slurry and elastomer latex, as well as other additives necessary for manufacturing the elastomer composite, and the particulate slurry, elastomer latex and other additives supplied to the coagulation reactor 120 are stored in each storage tank. It can be saved. For example, a particulate slurry storage tank 110a and an elastomer latex storage tank 110b may be individually connected upstream of the coagulation reactor 120. Additionally, an additive storage tank (not shown) in which other additives are stored may be connected.

The particulate slurry stored in the particulate slurry storage tank 110a may be a mixture of particulate fillers dispersed in a suitable fluid. Additionally, the particulate filler may be appropriately selected from conductive fillers, reinforcing fillers, short fibers, flakes, etc. The fluid in which the particulate slurry is dispersed may be water, alcohol, organic solvent, or mixtures thereof. Here, the type of particulate filler and the fluid in which the particulate filler is dispersed may be appropriately selected depending on the physical properties and use of the final product, the elastomer composite.

Suitable particulate fillers may be used, for example, carbon black, silica or mixtures thereof.

Carbon black used as a particulate filler may also be coated carbon black or chemically functionalized carbon black (e.g., organic functional group-attached carbon black, silicon-treated carbon black) as needed. Additionally, for example, N100 series carbon black, N200 series carbon black, N300 series carbon black, N700 series carbon black, N800 series carbon black, or N900 series carbon black may be used as the carbon black.

Silica used as a particulate filler may be fumed silica, precipitated silica, or a mixture thereof. Precipitated silica can be prepared by treating sodium silicate with an acid such as sulfuric acid in a chemical reactor.

The content of filler in the fine particle slurry may be at least 10 wt% or more, preferably 10 wt% to 20 wt%. If the content of the filler in the fine particle slurry is excessive, a coagulation mixture in the form of a fine powder may be generated, thereby reducing the yield of the master batch crumb in the form of worms or globules.

A stirring means may be installed in the particulate slurry storage tank 110a to prevent the dispersibility of the particulate filler from decreasing during storage of the particulate slurry.

The elastomer latex stored in the elastomer latex storage tank 110b may be natural rubber, synthetic rubber, or a mixture thereof.

Additionally, natural rubber may be field latex, latex concentrate, skim latex, or mixtures thereof.

Here, skim latex is a by-product obtained from centrifugation of natural rubber latex, and latex concentrate is prepared from centrifugation of field latex. For example, after stabilization of the field latex, it is fed to a continuous centrifuge to separate a stream containing latex concentrate and a stream containing skim latex. Latex concentrate typically contains about 60 wt% of rubber, and skim latex may contain about 3 to 10 wt% of rubber, but the content of rubber in each stream depends on the operating method of the centrifuge and the feed flow rate of the latex. It may vary depending on

The mixing ratio of natural rubber and synthetic rubber in elastomer latex, or the mixing ratio of field latex, latex concentrate, and skim latex in natural rubber may be appropriately selected depending on the physical properties and uses of the final product, the elastomer composite.

Synthetic rubbers include, for example, 1,3-butadiene, styrene, isoprene, isobutylene, 2,3-dialkyl-1,3-butadiene (where alkyl may be methyl, ethyl, propyl, etc.), acrylic. Polymers (e.g., homopolymers, copolymers and/or terpolymers) such as ronitrile, ethylene, and propylene and any oil-extended derivatives thereof may be used, but are not necessarily limited thereto.

Other additive storage tank 110c may store various additives known in the rubber industry for creating a coagulation mixture or for producing molds or extrudates from a masterbatch. These additives include, for example, reaction accelerators, antioxidants, heat stabilizers, light stabilizers, anti-ozonators, processing aids, plasticizers, tackifiers, swelling agents, dyes, pigments, waxes, extenders, organic acids, retarders, metal oxides, activators. and mixtures thereof may be used. In addition, in another embodiment, a different type of elastomer latex from the elastomer latex stored in the elastomer latex storage tank 110b is stored in the additive storage tank instead of the additive used to manufacture the elastomer composite and supplied into the coagulation reactor 120. It can be configured.

The particulate slurry and elastomer latex stored in the particulate slurry storage tank 110a and the elastomer latex storage tank 110b are continuously supplied to the mixing zone of the coagulation reactor 120 to produce a coagulation mixture that is the master batch crumb, and the coagulation mixture is solidified. It may be discharged to the outlet side of the reactor 120 and transferred to the dehydration extruder 130 located downstream of the coagulation reactor 120.

The dehydration extruder 130 may transfer the coagulation mixture generated from the coagulation reactor 120 in one direction while dehydrating and compressing the coagulation mixture so that the moisture content of the coagulation mixture is about 20 wt% or less. If the moisture content of the coagulation mixture exceeds 20 wt%, the efficiency of the subsequent process located downstream of the dehydration extruder 130 may be reduced. For example, if there is excessive moisture in the coagulation mixture, the effect of improving the physical properties of the elastomer composite during mastication may be minimal. On the other hand, if the moisture content of the coagulation mixture is excessively small, decomposition of the rubber in the elastomer composite may occur, so the dehydration extruder 130 dehydrates and dehydrates the coagulation mixture so that the moisture content of the coagulation mixture is at least about 3 wt% or more. Compression is desirable.

Subsequent processes located downstream of the dehydration extruder 130 may include a drying process and a masticating process. The drying and masticating device in which the drying and masticating processes are performed may be a continuous mixer, internal mixer, twin-screw extruder, single-screw extruder, or roll mill, and the dehydrated coagulated mixture may be mechanically masticated at the same time as it is dried in the drying device. You can.

In this embodiment, a continuous mixer, internal mixer, twin-screw extruder, single-screw extruder, or roll mill can be used as the dehydration extruder 130, and the coagulated mixture is dehydrated and compressed in the dehydration extruder 130, followed by drying and mastication. This can be performed continuously. In this case, a packaging process, etc. may be located downstream of the dehydration extruder 130.

At this time, an additive feeder 140 may be installed in the dehydration extruder 130 to supply the antioxidant into the dehydration extruder 130 and mix the antioxidant with the coagulated mixture to be dehydrated and dried.

Referring to FIG. 2, the additive feeder 140 may be installed adjacent to the outlet 132 of the dehydration extruder 130. The additive feeder 140 is installed on the inlet 131 side of the dehydration extruder 130 to supply antioxidants together with the coagulated mixture before dehydration, or is installed adjacent to the inlet 131 side of the dehydration extruder 130 to prevent sufficient dehydration. If antioxidants are supplied to an uncoagulated mixture, there is a possibility that the antioxidants will be lost along with the water that is dehydrated from the coagulated mixture.

For this purpose, the additive feeder 140 is positioned adjacent to the outlet 132 side of the dehydration extruder 130, for example, to reduce the moisture content of the coagulated mixture that is dehydrated and compressed in the dehydration extruder 130 and transported in one direction. It is desirable to induce proper mixing of the sufficiently dehydrated coagulated mixture and the antioxidant by installing it in a position where the concentration is at least 5 wt% or less.

In general, antioxidants used in the production of elastomer composites are solid substances. When such solid antioxidants are mixed with the coagulation mixture, even if mixed during the mastication process, the solid antioxidants in the coagulation mixture are not sufficiently dispersed and the elastomer is formed. There is a problem in that it does not significantly contribute to improving the crack resistance and wear resistance of the composite.

Accordingly, according to the present invention, the additive feeder 140 can supply the liquid antioxidant into the dehydration extruder 130 for uniform mixing of the antioxidant with the coagulated mixture that is dehydrated and dried within the dehydration extruder 130. .

For this purpose, the additive feeder 140 is installed in the storage tank 141 and the storage tank 141 to which the solid antioxidant is supplied, and melts the solid antioxidant supplied to the storage tank 141 by heating it above the melting point. It may include a heating unit 142.

Here, the heating unit 142 may be, for example, a heating jacket installed on the outer peripheral surface of the storage tank 141 to inductively heat the solid antioxidant in the storage tank 141. In addition, the additive feeder 140 includes a nozzle unit 143 installed through the dehydration extruder 130, and when an inert gas such as nitrogen or argon is supplied by the gas supply unit 144, the liquid antioxidant is It may be sprayed at high pressure through the nozzle unit 143 toward the coagulated mixture that is dehydrated and dried within the dehydration extruder 130.

Liquid antioxidants can be mixed with the coagulated mixture that is dehydrated and dried in the dehydration extruder 130 through a masticating process, and unlike solid antioxidants, their dispersibility in the coagulated mixture can be further improved.

In addition, the additive feeder 140 can be used to further improve the dispersibility in the elastomer composite by adding antioxidants as well as various additives used in the production of the elastomer composite when the coagulation mixture has a predetermined moisture content or less. there is.

Figure 3 schematically shows the configuration of an elastomer composite manufacturing apparatus according to another embodiment of the present invention, and Figure 4 schematically shows an example of a dehydration extruder used in the elastomer composite manufacturing apparatus shown in Figure 3.

Referring to Figures 3 and 4, an elastomer composite manufacturing apparatus according to another embodiment of the present invention includes a coagulation reactor 220, a dehydration extruder 230, a dry extruder 240, and an additive feeder 250.

A particulate slurry storage tank 210a and an elastomer latex storage tank 210b may be individually connected upstream of the coagulation reactor 220. In addition, an additive storage tank (not shown) in which other additives are additionally stored may be connected, and in the additive storage tank, a different type of elastomer latex than the elastomer latex stored in the elastomer latex storage tank 210b is stored instead of the additive, and is stored in the coagulation reactor. It can be configured to supply within (220).

The particulate slurry, elastomer latex and other additives stored in the particulate slurry storage tank 210a and the elastomer latex storage tank 210b are continuously fed to the mixing zone of the coagulation reactor 220 to produce a coagulation mixture, which is the master batch crumb, and is subjected to coagulation. The mixture may be discharged to the outlet side of the coagulation reactor 220 and transferred to the dehydration extruder 230 located downstream of the coagulation reactor 220.

The dehydration extruder 230 may transfer the coagulation mixture generated from the coagulation reactor 220 in one direction while dehydrating and compressing the coagulation mixture so that the moisture content of the coagulation mixture is about 10 wt% or less. If the moisture content of the coagulated mixture exceeds 20 wt%, the efficiency of the masticating process in the dry extruder 240, which involves a mechanical masticating process located downstream of the dehydrating extruder 230, may be reduced.

Downstream of the dehydration extruder 230, a dry extruder 240 is located that dries the coagulated mixture dehydrated and compressed in the dehydration extruder 230. The dry extruder 240 includes a continuous mixer, an internal mixer, a twin-screw extruder, and a single-screw extruder. Alternatively, a roll mill may be used.

At this time, an additive feeder 250 may be installed in the dry extruder 240 to supply the antioxidant into the dry extruder 240 and mix the antioxidant with the coagulated mixture to be dehydrated and dried.

Referring to FIG. 4, the additive feeder 250 may be installed adjacent to the inlet 241 of the dry extruder 240. Since the coagulated mixture supplied into the dry extruder 240 is supplied in a sufficiently dehydrated state in the dehydration extruder 230, the additive feeder 250 is installed on the inlet 241 side of the dry extruder 240 to dry the coagulated mixture. It is desirable to sufficiently mix with the additives (eg, antioxidants, waxes, etc.) supplied from the additive feeder 250 while passing through the extruder 240.

The additive feeder 250 may supply a liquid antioxidant into the dry extruder 240 for uniform mixing of the antioxidant with the coagulated mixture dried within the dry extruder 240.

For this purpose, the additive feeder 250 is installed in the storage tank 251 and the storage tank 251 to which the solid antioxidant is supplied, and melts the solid antioxidant supplied to the storage tank 251 by heating it above the melting point. It may include a heating unit 252.

Here, the heating unit 252 may be, for example, a heating jacket installed on the outer peripheral surface of the storage tank 251 to inductively heat the solid antioxidant in the storage tank 251. In addition, the additive feeder 250 includes a nozzle unit 253 installed through the dry extruder 240, and when an inert gas such as nitrogen or argon is supplied by the gas supply unit 254, the liquid antioxidant is It can be sprayed at high pressure through the nozzle unit 253 toward the coagulated mixture being dried in the dry extruder 240.

Liquid antioxidants can be mixed with the coagulation mixture dried in the dry extruder 240 through a masticating process, and unlike solid antioxidants, their dispersibility in the coagulation mixture can be further improved.

In addition, downstream of the dry extruder 240, a packaging process for the dried coagulated mixture discharged to the outlet 242 of the dry extruder 240 may be located as a subsequent process.

Below, specific embodiments of the present invention are presented. However, the examples described below are only for illustrating or explaining the present invention in detail, and the present invention should not be limited thereto.

Preparation of elastomer composites

Example

The wet masterbatch (carbon black: 50PHR, rubber: 100PHR) prepared through the wet mixing method was dehydrated to a moisture content of 5wt% using a twin-screw extruder. In the process of passing the dehydrated wet master batch through a dry extruder set at 120°C, 1.5PHR of antioxidant (6PPD) was added. Antioxidants were added at 1/3 of the total length of the dry extruder (position adjacent to the inlet).

Antioxidants were stirred and dissolved in an autoclave set to a temperature above the melting point (45°C) of 6PPD. Nitrogen gas was injected into the autoclave to maintain a pressure of 3 bar, and then extruded at a constant speed through a nozzle installed in the dry extruder. It was sprayed under high pressure and mixed with the wet masterbatch.

Comparative Example 1

An elastomer composite was prepared in the same manner as in Example 1, except that the solid antioxidant was added into the dry extruder.

Comparative Example 2

An elastomer composite was prepared in the same manner as in Example 1, except that a liquid antioxidant was added before dehydrating the wet master batch.

Comparative Example 3

An elastomer composite was prepared in the same manner as in Example 1, except that a liquid antioxidant was added when preparing the wet master batch.

Physical property evaluation

Samples were prepared by vulcanizing the elastomer composites prepared in Examples and Comparative Examples 1 to 3 at 145°C for 30 minutes, and then the abrasion resistance (LAMBOURN) test and the crack resistance (DEMATTIA) physical property test were measured according to ASTM standards. and the results are shown in Table 1 below.

division Example Comparative Example 1 Comparative Example 2 Comparative Example 3 Crack resistance 1,800,000 cycles 1,200,000 cycles 1,200,000 cycles 1,100,000 cycles wear resistance 105 101 100 102

Abrasion resistance is expressed as a relative value based on Comparative Example 1, and the higher the value, the better the abrasion resistance. The crack resistance results were expressed as the number of cycles consumed until the crack grew up to 25MM in the horizontal length of the total sample.

Referring to the results in Table 1, it can be seen that the specimens manufactured using the elastomer composite prepared according to the examples had excellent wear resistance and crack resistance compared to Comparative Examples 1 to 3.

That is, unlike conventional solid antioxidants added and mixed before or after dehydration of the wet masterbatch when producing a wet masterbatch, liquid antioxidants are added and mixed after dehydration of the wet masterbatch, thereby producing wet masterbatch. It can be confirmed that it is possible to increase the dispersibility of the antioxidant in the elastomer composite by improving the mixing effect of the antioxidant with the master batch. Accordingly, according to this embodiment, it is possible to manufacture a rubber product with improved crack resistance and wear resistance by preventing decomposition of the elastomer composite by increasing the dispersibility of the antioxidant in the elastomer composite.

As described above, the present invention has been described with reference to the illustrative drawings, but the present invention is not limited to the embodiments and drawings disclosed herein, and various modifications may be made by those skilled in the art within the scope of the technical idea of the present invention. It is obvious that transformation can occur. In addition, although the operational effects according to the configuration of the present invention were not explicitly described and explained while explaining the embodiments of the present invention above, it is natural that the predictable effects due to the configuration should also be recognized.

Claims (10)

a coagulation reactor into which particulate slurry and elastomer latex are fed to produce a coagulation mixture;
A dehydration extruder located downstream of the coagulation reactor and dehydrating and compressing the coagulation mixture; and
It includes an additive feeder that supplies antioxidants into the dehydration extruder,
The additive feeder is,
A heating unit that heats and dissolves the solid antioxidant; and
a nozzle unit that sprays the liquid antioxidant dissolved in the heating unit at high pressure;
Including,
Elastomer composite manufacturing device.
a coagulation reactor into which particulate slurry and elastomer latex are fed to produce a coagulation mixture;
A dehydration extruder located downstream of the coagulation reactor and dehydrating and compressing the coagulation mixture;
A dry extruder located downstream of the dehydration extruder and drying the coagulated mixture dehydrated and compressed in the dehydration extruder; and
Includes an additive feeder that supplies antioxidants into the dry extruder,
The additive feeder is,
A heating unit that heats and dissolves the solid antioxidant; and
a nozzle unit that sprays the liquid antioxidant dissolved in the heating unit at high pressure;
Including,
Elastomer composite manufacturing device.
delete According to paragraph 1,
The additive feeder is installed at a location or outlet side where the moisture content of the coagulated mixture, which is dehydrated and compressed in the dehydration extruder and transported in one direction, is at least 5 wt% or less,
Elastomer composite manufacturing device.
According to paragraph 2,
The additive feeder is installed on the inlet side of the dry extruder,
Elastomer composite manufacturing device.
a) preparing a particulate slurry in which particulate filler is dispersed;
b) preparing an elastomer latex containing an elastomer;
c) feeding the particulate slurry and the elastomer latex to a mixing zone of a coagulation reactor to produce a coagulation mixture;
d) dehydrating the coagulated mixture by supplying it to a dehydration extruder; and
e) mixing the dehydrated coagulation mixture with an antioxidant;
Including,
Step e) includes preparing a liquid antioxidant by dissolving the antioxidant, and then spraying the liquid antioxidant at high pressure toward the coagulation mixture.
Method for manufacturing elastomer composites.
According to clause 6,
Step d) is performed so that the moisture content of the coagulation mixture is 5 wt% or less,
Method for manufacturing elastomer composites.
According to clause 6,
Step e) is performed at a location where the moisture content of the coagulated mixture, which is dehydrated and compressed in the dehydration extruder and transported in one direction, is at least 5 wt% or less,
Method for manufacturing elastomer composites.
delete According to clause 6,
Step e) is carried out in a dry extruder located downstream of the dehydration extruder,
Method for manufacturing elastomer composites.

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