PVC composite stabilizer manufacturing device and PVC composite stabilizer manufacturing method

Abstract

A liquid stabilizer manufacturing unit comprising: a first heat treatment unit that heat-treats a liquid stabilizer source, comprising calcium hydroxide, zinc oxide, acid, and distilled water, at a first temperature for a first time; a vacuum unit that removes distilled water from the first heat-treated liquid stabilizer source in a vacuum atmosphere to produce a base liquid stabilizer; and a rotary atomization unit that provides an atomizing agent to the base liquid stabilizer and rotates it at high speed to produce a liquid stabilizer comprising particles atomized to a size smaller than the particle size constituting the base liquid stabilizer; an ultrasonic treatment unit that ultrasonically treats a powder stabilizer source, comprising calcium hydroxide, zinc nitrate, an organic compound, and distilled water; a hydrothermal treatment unit that hydrothermally treats the ultrasonically treated powder stabilizer in a sealed state to produce a base powder stabilizer; and a second heat treatment unit that centrifuges the base powder stabilizer to produce a powder stabilizer by heat-treating the powder obtained therefrom for a second time longer than the first time at a second temperature equal to or higher than the first temperature. A PVC composite stabilizer manufacturing apparatus is provided, comprising a stabilizer manufacturing unit, a stirring unit for mixing the liquid stabilizer and a porous silicon compound to produce a pre-composite stabilizer in which the liquid stabilizer is absorbed into the porous silicon compound, and a stirring unit for mixing the pre-composite stabilizer and the powder stabilizer to produce a composite stabilizer for PVC (polyvinyl chloride), and a cooling unit for cooling the stirring unit.

Description

Technology Field

[0001] The present invention relates to an apparatus for manufacturing a composite stabilizer for PVC and a method for manufacturing a composite stabilizer for PVC, and more specifically, to an apparatus for manufacturing a composite stabilizer for PVC and a method for manufacturing a composite stabilizer for PVC comprising a liquid and a powder stabilizer, wherein the exposure of the powder stabilizer to the liquid stabilizer is minimized. Background Technology

[0002] PVC (polyvinyl chloride) has excellent processability and offers the advantage of being eco-friendly, as it generates less carbon dioxide during the molding process compared to other plastic materials. Furthermore, PVC is not only cheaper than materials such as aluminum but also possesses superior properties including thermal insulation, airtightness, sound insulation, chemical resistance, wind pressure resistance, watertightness, and electrical insulation.

[0003] Therefore, PVC is used across a wide range of industries, such as construction materials, automotive interior and exterior materials, and food packaging materials.

[0004] On the other hand, because PVC contains chlorine, it is susceptible to heat and has low impact strength compared to other polymers.

[0005] Accordingly, conventionally, to reinforce the brittleness of PVC as described above, PVC stabilizers are mixed with PVC and used.

[0006] Conventional PVC stabilizers can be classified into powder and liquid types depending on the form of handling. Additionally, PVC stabilizers can be classified into Pb-based, Ca-Zn-based, Ba-Zn-based, Cd-Ba-Zn-based, and organic-TIN-based types depending on the chemical components constituting the PVC stabilizer.

[0007] Conventional Pb-based or Cd-Ba-Zn-based PVC stabilizers have excellent heat resistance, transparency, colorability, and processability.

[0008] However, Pb-based or Cd-Ba-Zn-based PVC stabilizers use heavy metals harmful to the human body, so they are harmful to human health and can cause environmental pollution.

[0009] Accordingly, research is underway to develop PVC stabilizers that do not contain heavy metals.

[0010] However, in the case of PVC stabilizers that do not contain heavy metals as previously described, there is a problem of reduced impact strength when mixed with PVC to manufacture molded products.

[0011] Accordingly, there is a need for a PVC stabilizer that is harmless to the human body and environmentally friendly, while also possessing high impact strength even when mixed with PVC to manufacture molded products. The problem to be solved

[0012] The technical problem that the present invention aims to solve is to provide a method for manufacturing a composite stabilizer for PVC in which aggregation between the powder stabilizer and the liquid stabilizer is minimized, dispersibility is improved, and the micronized particle size of the liquid stabilizer is maintained.

[0013] Another technical problem that the present invention aims to solve is to provide a method for manufacturing a composite stabilizer for PVC having excellent impact strength.

[0014] Another technical problem that the present invention aims to solve is to provide a method for manufacturing a composite stabilizer for PVC with improved colorability, weather resistance, and heat resistance.

[0015] Another technical problem that the present invention aims to solve is to provide a method for manufacturing a composite stabilizer for PVC that is harmless to the human body and environmentally friendly.

[0016] The technical problems that the present invention aims to solve are not limited to those described above. means of solving the problem

[0017] To solve the above technical problem, the present invention provides a composite stabilizer manufacturing apparatus for PVC.

[0018] According to one embodiment, the apparatus for manufacturing a composite stabilizer for PVC comprises: a liquid stabilizer manufacturing unit comprising a first heat treatment unit that heat-treats a liquid stabilizer source, comprising calcium hydroxide, zinc oxide, acid, and distilled water, at a first temperature for a first time; a vacuum unit that removes distilled water from the first heat-treated liquid stabilizer source in a vacuum atmosphere to produce a base liquid stabilizer; and a rotary atomization unit that provides an atomizing agent to the base liquid stabilizer and rotates it at high speed to produce a liquid stabilizer comprising particles atomized to a size smaller than the particle size constituting the base liquid stabilizer; an ultrasonic treatment unit that ultrasonically treats a powder stabilizer source, comprising calcium hydroxide, zinc nitrate, an organic compound, and distilled water; a hydrothermal treatment unit that hydrothermally treats the ultrasonically treated powder stabilizer in a sealed state to produce a base powder stabilizer; and a second unit that centrifuges the powder obtained from the base powder stabilizer and heats it at a second temperature equal to or higher than the first temperature for a second time longer than the first time. It may include a powder stabilizer manufacturing unit composed of a second heat treatment unit that manufactures a powder stabilizer by heat treatment, a pre-composite stabilizer in which the liquid stabilizer is absorbed into the porous silicon compound by mixing the liquid stabilizer and the porous silicon compound, a stirring unit that manufactures a composite stabilizer for PVC (polyvinyl chloride) by mixing the pre-composite stabilizer and the powder stabilizer, and a cooling unit that cools the stirring unit.

[0019] Furthermore, the rotary atomizing unit comprises a first housing and a second housing provided at a predetermined distance from the first housing, wherein the first housing rotates at a first rotational speed while an atomizing agent is supplied to the base liquid stabilizer to atomize the particle size constituting the base liquid stabilizer and has a receiving port for obtaining the atomized liquid stabilizer, wherein the first housing has a shape that is wide at the bottom and narrow at the top, and the receiving port has a shape that is inclined upward as it moves from the inside to the outside of the first housing, and the second housing rotates at a second rotational speed slower than the first rotational speed of the first housing so as to change the collection position of the atomized liquid stabilizer that has passed through the receiving port of the first housing, wherein ultrasonic waves are applied to the second housing to maintain the atomized state of the atomized base liquid stabilizer, and the second housing includes a collection port for collecting the atomized liquid stabilizer, and the liquid stabilizer collected in the collection port is to the stirring unit It can be provided.

[0020] According to one embodiment, the stirring member may include a first rotating shaft rotating at a first speed, a first stirring blade coupled to the first rotating shaft and rotating in tandem, and a second rotating shaft rotating at a second speed faster than the first speed, and a second stirring blade coupled to the second rotating shaft and rotating in tandem.

[0021] According to one embodiment, the powder stabilizer has a flake shape, and the average particle size of the micronized particles of the liquid stabilizer is smaller than or equal to the average pore size of the porous silicon compound, and the average particle size of the flake-shaped powder stabilizer may be larger than or equal to the average pore size of the porous silicon compound.

[0022] According to one embodiment, the first temperature of the first heat treatment unit is 100°C or higher and 150°C or lower, the first time is 10 minutes or higher and 60 minutes or lower, the second temperature of the second heat treatment unit is 150°C or higher and 300°C or lower, and the second time may be 12 hours.

[0023] According to one embodiment, the ultrasonic treatment of the ultrasonic treatment unit can be performed at 100 W or more and 2,000 W or less.

[0024] According to one embodiment, the hydrothermal treatment of the hydrothermal treatment unit may be performed at 120°C or higher and 220°C or lower for 5 hours or more and 12 hours or less.

[0025] According to one embodiment, the acid of the liquid stabilizer source comprises at least one of benzoic acid, oleic acid, and citric acid, the atomizing agent is a mixture of PVA (polyvinyl alcohol) and an emulsifier, the organic compound of the powder stabilizer source is urea, and the porous silicon compound may be any one selected from porous silica, aluminosilicate, and mixtures thereof.

[0026] According to one embodiment, the average particle size of the micronized particles of the liquid stabilizer is 1 Å or more and 10 Å or less, the average particle size of the plate-shaped powder stabilizer is 50 nm or more and 500 nm or less, and the porous silicon compound may have an average particle size of 0.01 μm or more and 1,000 μm or less, and an average pore size of 1 Å or more and 500 Å or less.

[0028] To solve the above technical problem, the present invention provides a method for manufacturing a composite stabilizer for PVC.

[0029] According to one embodiment, the method for manufacturing a composite stabilizer for PVC comprises the steps of: preparing a liquid stabilizer source comprising calcium hydroxide, zinc oxide, acid, and distilled water; preparing a base liquid stabilizer by performing a first heat treatment of the liquid stabilizer source at a first temperature for a first time and removing distilled water from the liquid stabilizer source in a vacuum atmosphere; preparing a liquid stabilizer comprising particles atomized to a size smaller than the particle size constituting the base liquid stabilizer by providing a micronizing agent to the base liquid stabilizer and rotating it at high speed; preparing a powder stabilizer source comprising calcium hydroxide, zinc nitrate, an organic compound, and distilled water; preparing a base powder stabilizer by ultrasonically treating the powder stabilizer source and hydrothermally treating it in a sealed state; preparing a powder stabilizer by centrifuging the base powder stabilizer and performing a second heat treatment of the obtained powder at a second temperature equal to or higher than the first temperature for a second time longer than the first time; and mixing the liquid stabilizer and a porous silicon compound. The method may include the step of preparing a pre-composite stabilizer in which the liquid stabilizer is absorbed into a porous silicon compound, and the step of preparing a composite stabilizer for PVC by mixing the pre-composite stabilizer and the powder stabilizer.

[0030] According to one embodiment, the liquid stabilizer in the step of preparing the preliminary composite stabilizer is mixed at 40 wt% and the porous silicon compound at 5 wt%, and the powder stabilizer in the step of preparing the composite stabilizer for PVC can be mixed at 60 wt%.

[0031] According to one embodiment, the liquid stabilizer source in the step of preparing the liquid stabilizer source may contain 10 wt% of calcium hydroxide, 3 wt% of zinc oxide, 7 wt% of acid, and 80 wt% of distilled water, and the powder stabilizer source in the step of preparing the powder stabilizer source may contain 10 wt% of calcium hydroxide, 5 wt% of zinc nitrate, 30 wt% of organic compound, and 55 wt% of distilled water.

[0032] According to one embodiment, the acid in the step of preparing the liquid stabilizer source comprises at least one of benzoic acid, oleic acid, and citric acid, and the acid may comprise 2 wt% of the benzoic acid, 3 wt% of the oleic acid, and 2 wt% of the citric acid.

[0033] According to one embodiment, the atomizing agent in the step of manufacturing the liquid stabilizer may be provided in an amount of 2 wt% or more and 3 wt% or less relative to 100 wt% of the base liquid stabilizer. Effects of the invention

[0034] According to an embodiment of the present invention, the liquid stabilizer manufacturing unit comprises: a first heat treatment unit that heat-treats a liquid stabilizer source, comprising calcium hydroxide, zinc oxide, acid, and distilled water, for a first time at a first temperature; a vacuum unit that removes distilled water from the first heat-treated liquid stabilizer source in a vacuum atmosphere to produce a base liquid stabilizer; and a rotary atomization unit that provides an atomizing agent to the base liquid stabilizer and rotates it at high speed to produce a liquid stabilizer comprising particles atomized to a size smaller than the particle size constituting the base liquid stabilizer; an ultrasonic treatment unit that ultrasonically treats a powder stabilizer source, comprising calcium hydroxide, zinc nitrate, an organic compound, and distilled water; a hydrothermal treatment unit that hydrothermally treats the ultrasonically treated powder stabilizer in a sealed state to produce a base powder stabilizer; and a second heat treatment unit that produces a powder stabilizer by centrifuging the base powder stabilizer and heat-treating the powder obtained therefrom for a second time longer than the first time at a second temperature equal to or higher than the first temperature. A PVC composite stabilizer manufacturing apparatus may be provided, comprising a powder stabilizer manufacturing unit composed of a heat treatment unit, a pre-composite stabilizer in which the liquid stabilizer and the porous silicon compound are mixed to produce a pre-composite stabilizer in which the liquid stabilizer is absorbed into the porous silicon compound, a stirring unit that mixes the pre-composite stabilizer and the powder stabilizer to produce a composite stabilizer for PVC (polyvinyl chloride), and a cooling unit that cools the stirring unit.

[0035] According to an embodiment of the present invention, the powder stabilizer has a flake shape, and the average particle size of the micronized particles of the liquid stabilizer is smaller than or equal to the average pore size of the porous silicon compound, and the average particle size of the flake-shaped powder stabilizer may be larger than or equal to the average pore size of the porous silicon compound.

[0036] Accordingly, the liquid stabilizer is easily absorbed through the pores of the porous silicon compound, whereas the plate-shaped powder stabilizer, unlike the liquid stabilizer, may have difficulty passing through the pores of the porous silicon compound.

[0037] Accordingly, according to an embodiment of the present invention, the liquid stabilizer is absorbed through the pores of the porous silicon compound, but the powder stabilizer is not absorbed, so the exposure of the powder stabilizer to an excess amount of the liquid stabilizer can be minimized.

[0038] In addition, according to an embodiment of the present invention, the liquid stabilizer and the porous silicon compound are mixed first, and the powder stabilizer is mixed later. Since the powder stabilizer is mixed after the liquid stabilizer has been sufficiently absorbed into the porous silicon compound, the exposure of the powder stabilizer to an excess amount of the liquid stabilizer can be minimized.

[0039] Accordingly, according to an embodiment of the present invention, the aggregation phenomenon that may occur when the powder stabilizer is exposed to and mixed with an excess amount of the liquid stabilizer can be minimized, the dispersibility between the powder stabilizer and the liquid stabilizer can be improved, and the micronized particle size of the liquid stabilizer can be maintained.

[0040] Furthermore, the heat resistance of the PVC composite stabilizer can be improved by first manufacturing the above-mentioned pre-composite stabilizer and mixing the above-mentioned pre-composite stabilizer with the above-mentioned powder stabilizer.

[0042] In addition, the liquid stabilizer according to the embodiment of the present invention improves the initial color, transparency, weather resistance, foaming properties, etc. of PVC, and can be harmless to the human body and environmentally friendly.

[0043] Meanwhile, the above powder stabilizer can improve the weather resistance and foaming properties of PVC.

[0044] The PVC composition according to an embodiment of the present invention includes both the liquid stabilizer and the powder stabilizer, so that the liquid stabilizer and the powder stabilizer complement each other, thereby improving colorability, weather resistance, and heat resistance.

[0045] In addition, it goes without saying that the colorability, weather resistance, and heat resistance of the PVC molded article manufactured from the above PVC composition can be improved. Brief explanation of the drawing

[0046] FIG. 1 is a drawing for explaining a composite stabilizer manufacturing apparatus for PVC according to an embodiment of the present invention. FIG. 2 is a drawing for explaining a PVC molded product manufacturing apparatus according to an embodiment of the present invention. FIG. 3 is a drawing for explaining a method for manufacturing a composite stabilizer for PVC according to an embodiment of the present invention. FIG. 4 is a drawing for explaining a method for manufacturing a PVC molded article according to an embodiment of the present invention. FIG. 5 is a drawing for explaining a rotary atomizing unit according to one embodiment of the present invention in more detail. Specific details for implementing the invention

[0047] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. However, the technical concept of the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided to ensure that the disclosed content is thorough and complete, and to ensure that the concept of the present invention is sufficiently conveyed to those skilled in the art.

[0048] In this specification, when a component is described as being on another component, it means that it may be formed directly on the other component or that a third component may be interposed between them. Additionally, in the drawings, the thicknesses of shapes and regions are exaggerated for the effective description of the technical content.

[0049] Additionally, although terms such as first, second, third, etc., have been used to describe various components in the various embodiments of this specification, these components should not be limited by such terms. These terms are used merely to distinguish one component from another. Accordingly, what is referred to as the first component in one embodiment may be referred to as the second component in another embodiment. Each embodiment described and illustrated herein also includes its complementary embodiment. Furthermore, in this specification, "and / or" is used to mean including at least one of the components listed before and after it.

[0050] In the specification, singular expressions include plural expressions unless the context clearly indicates otherwise. Furthermore, terms such as "include" or "have" are intended to specify the existence of the features, numbers, steps, components, or combinations thereof described in the specification, and should not be understood as excluding the existence or addition of one or more other features, numbers, steps, components, or combinations thereof. Additionally, in this specification, "connection" is used to include both indirectly connecting multiple components and directly connecting them.

[0051] Additionally, terms such as “…part,” “…unit,” and “module” described in the specification refer to a unit that processes at least one function or operation, and this may be implemented in hardware, software, or a combination of hardware and software.

[0052] In addition, in describing the present invention below, if it is determined that a detailed description of related known functions or configurations could unnecessarily obscure the essence of the invention, such detailed description will be omitted.

[0054] Hereinafter, with reference to the drawings, an apparatus for manufacturing a composite stabilizer for PVC (polyvinyl chloride) according to an embodiment of the present invention is described.

[0056] FIG. 1 is a drawing for explaining a composite stabilizer manufacturing apparatus for PVC according to an embodiment of the present invention.

[0057] Referring to FIG. 1, the PVC composite stabilizer manufacturing device (1000) may include at least one of a liquid stabilizer manufacturing unit (100), a powder stabilizer manufacturing unit (200), and a PVC composite stabilizer manufacturing unit (300).

[0058] Hereinafter, each component of the above-mentioned composite stabilizer manufacturing device (1000) for PVC will be described in detail.

[0060] Liquid stabilizer manufacturing unit (100)

[0061] The above liquid stabilizer manufacturing unit (100) may include at least one of a first heat treatment unit (110), a vacuum unit (130), and a rotary atomization unit (150).

[0062] Below, each component of the above-mentioned liquid stabilizer manufacturing unit (100) is described in detail.

[0064] 1st heat treatment section (110)

[0065] In the first heat treatment section (110) above, a liquid stabilizer source can be heat-treated for the first time.

[0066] More specifically, in the first heat treatment unit (110), the liquid stabilizer source may be heat-treated for a first time at a first temperature. For example, in the first heat treatment unit (110), the liquid stabilizer source may be heat-treated for a first time of 10 minutes or more and 60 minutes or less at the first temperature of 100°C or more and 150°C or less.

[0067] To this end, according to one embodiment, the first heat treatment unit (110) may include a heater.

[0069] Meanwhile, the liquid stabilizer source may include at least one of calcium hydroxide, zinc oxide, acid, and distilled water. For example, the liquid stabilizer source may include 10 wt% of calcium hydroxide, 3 wt% of zinc oxide, 7 wt% of acid, and 80 wt% of distilled water.

[0070] The acid in the above liquid stabilizer source may include at least one of benzoic acid, oleic acid, and citric acid. For example, among the acids included in the above liquid stabilizer source, 2 wt% of benzoic acid, 3 wt% of oleic acid, and 2 wt% of citric acid may be included.

[0071] Among the above acids, the oleic acid may be an oily liquid.

[0072] Accordingly, the liquid stabilizer comprising at least one of the above oleic acid and the above distilled water may be in a liquid state.

[0074] vacuum section (130)

[0075] In the vacuum section (130) above, distilled water is removed from the first heat-treated liquid stabilizer source in a vacuum atmosphere so that a base liquid stabilizer can be produced.

[0076] To this end, according to one embodiment, the vacuum unit (130) may include a vacuum pump, for example, a rotary pump.

[0077] According to one embodiment, in the vacuum section (130), the distilled water can be selectively removed from the first heat-treated liquid stabilizer source in the vacuum atmosphere.

[0078] Accordingly, as previously explained, the liquid stabilizer may remain in a liquid state even when the distilled water is removed, as it contains oleic acid, which is an oily liquid.

[0080] Rotating atomizing unit (150)

[0081] In the above-mentioned rotary atomizing unit (150), a liquid stabilizer containing particles atomized to a size smaller than the particle size constituting the base liquid stabilizer can be manufactured.

[0082] To this end, the rotary atomizing unit (150) can provide an atomizing agent to the base liquid stabilizer and rotate it at high speed.

[0083] Accordingly, the liquid stabilizer can be manufactured by including particles that are finer than the particle size constituting the base liquid stabilizer.

[0084] Here, "micronization" may mean providing the micronizing agent to the base liquid stabilizer and rotating it at high speed so that the average particle size of the liquid stabilizer becomes 1 Å or more and 10 Å or less. In addition, "high speed" among the high-speed rotations here may be a rotation speed such that the average particle size of the liquid stabilizer becomes 1 Å or more and 10 Å or less, as described above.

[0085] To this end, according to one embodiment, the rotary atomizing unit (150) may include a high-speed rotating shaft that rotates at high speed.

[0087] Meanwhile, the atomizing agent may be a mixture of PVA (polyvinyl alcohol) and an emulsifier. For example, the atomizing agent may be provided in an amount of 2 wt% or more and 3 wt% or less relative to 100 wt% of the base liquid stabilizer.

[0089] Above, a liquid stabilizer manufacturing unit (100) according to one embodiment of the present invention has been described.

[0090] According to one embodiment, the liquid stabilizer manufacturing unit (100) may include each of the previously described units, namely the first heat treatment unit (110), the vacuum unit (130), and the rotary atomization unit (150), as separate devices.

[0091] Meanwhile, according to one embodiment, the liquid stabilizer manufacturing unit (100) may, of course, be implemented through a single furnace including each of the above units.

[0092] Alternatively, according to one embodiment, the liquid stabilizer manufacturing unit (100) may be implemented through a series of devices comprising at least two of the respective units.

[0094] Powder stabilizer manufacturing unit (200)

[0095] The above powder stabilizer manufacturing unit (200) may include at least one of an ultrasonic treatment unit (210), a hydrothermal treatment unit (230), a centrifugal separation unit (250), and a second heat treatment unit (270).

[0096] Below, each component of the powder stabilizer manufacturing unit (200) is described in detail.

[0098] Ultrasonic processing unit (210)

[0099] In the ultrasonic processing unit (210), the powder stabilizer source can be ultrasonically processed. For example, in the ultrasonic processing unit (210), the powder stabilizer source can be ultrasonically processed at 100 W or more and 2,000 W or less.

[0100] To this end, according to one embodiment, the ultrasonic processing unit (210) may include ultrasonic waves.

[0102] Meanwhile, the powder stabilizer source may include at least one of calcium hydroxide, zinc nitrate, an organic compound, and distilled water. For example, the powder stabilizer source may include 10 wt% of calcium hydroxide, 5 wt% of zinc nitrate, 30 wt% of the organic compound, and 55 wt% of distilled water.

[0103] Meanwhile, the organic compound of the above powder stabilizer source may be urea.

[0105] Sequence processing unit (230)

[0106] In the above hydrothermal treatment unit (230), the ultrasonically treated powder stabilizer is hydrothermally treated in a sealed state so that a base powder stabilizer can be manufactured.

[0107] To this end, according to one embodiment, the hydrothermal processing unit (230) may include a hydrothermal synthesis container, for example, a hydrothermal synthesis container having a Teflon tube built into it.

[0108] In other words, in the hydrothermal treatment unit (230), the ultrasonically treated powder stabilizer can be provided to the hydrothermal synthesis container and hydrothermally treated while sealed. For example, in the hydrothermal treatment unit (230), the ultrasonically treated powder stabilizer can be provided to the hydrothermal synthesis container and sealed, and hydrothermally treated at 120°C or higher and 220°C or lower for 5 hours or more and 12 hours or less, so that the base powder stabilizer can be manufactured.

[0110] centrifugal separation unit (250)

[0111] In the above centrifugal separation unit (250), the base powder stabilizer can be centrifuged.

[0112] To this end, according to one embodiment, the centrifugal separation unit (250) may include a centrifuge.

[0113] Accordingly, the base powder stabilizer can be centrifuged through the centrifugal separation unit (250) to obtain powder.

[0115] 2nd heat treatment section (270)

[0116] In the second heat treatment unit (270) above, the powder can be heat-treated for the second time to produce a powder stabilizer.

[0117] More specifically, in the second heat treatment unit (270), the powder may be heat-treated for a second time at a second temperature. At this time, the second temperature may be equal to or higher than the first temperature in the first heat treatment unit (110) described above, and the second time may be longer than the first time in the first heat treatment unit (110) described above. For example, in the second heat treatment unit (270), the powder may be heat-treated for a second time of 12 hours at the second temperature of 150°C or higher and 300°C or lower.

[0118] Accordingly, the powder stabilizer in the form of a flake can be manufactured from the powder. For example, the average particle size of the powder stabilizer in the form of a flake can be 50 nm or more and 500 nm or less.

[0119] To this end, according to one embodiment, the second heat treatment unit (270) may include a heater.

[0121] Above, a powder stabilizer manufacturing unit (200) according to one embodiment of the present invention has been described.

[0122] According to one embodiment, the powder stabilizer manufacturing unit (200) may include each of the previously described units, namely the ultrasonic treatment unit (210), the hydrothermal treatment unit (230), the centrifugal separation unit (250), and the second heat treatment unit (270), as separate devices.

[0123] Meanwhile, according to one embodiment, the powder stabilizer manufacturing unit (200) may be implemented through a series of devices including at least two of the above units.

[0125] PVC composite stabilizer manufacturing unit (300)

[0126] The above-mentioned PVC composite stabilizer manufacturing unit (300) may include at least one of a stirring unit (310) and a cooling unit (330).

[0127] Below, each component of the above-mentioned composite stabilizer manufacturing unit (300) for PVC is described in detail.

[0129] stirring part (310)

[0130] In the above stirring unit (310), a composite stabilizer for PVC can be manufactured.

[0131] More specifically, first, in the stirring unit (310), the liquid stabilizer and the porous silicon compound are mixed to produce a pre-composite stabilizer in which the liquid stabilizer is absorbed into the porous silicon compound. Subsequently, in the stirring unit (310), the pre-composite stabilizer and the powder stabilizer are mixed to produce a composite stabilizer for PVC.

[0132] To this end, the stirring unit (310) may include a first rotating shaft that rotates at a first speed (e.g., 7,000 rpm), a first stirring blade coupled to the first rotating shaft and rotating in tandem, and a second rotating shaft that rotates at a second speed faster than the first speed (e.g., 12,000 rpm), and a second stirring blade coupled to the second rotating shaft and rotating in tandem. For example, the stirring unit (310) may be a two-axis mixing device such as a rotor or a kneader that includes the first and second rotating shafts as described above.

[0133] Accordingly, in the stirring section (310), the upper and lower parts within the stirring section (310) can be easily crossed in the mixing of at least one of the liquid stabilizer and the porous silicon compound and the mixing of the pre-composite stabilizer and the powder stabilizer by different rotational speeds of the first and second stirring blades.

[0134] Therefore, in the manufacture of the above-mentioned preliminary composite stabilizer and the above-mentioned composite stabilizer for PVC, it goes without saying that the materials can be uniformly mixed.

[0136] Meanwhile, as previously described, in the stirring unit (310), the liquid stabilizer and the porous silicon compound are first mixed to produce a pre-composite stabilizer in which the liquid stabilizer is absorbed into the porous silicon compound. For example, 40 wt% or more and 150 wt% or less of the liquid stabilizer and 2 wt% or more and 10 wt% or less of the porous silicon compound may be mixed.

[0137] At this time, the porous silicon compound may have an average particle size of 0.01 μm or more and 1,000 μm or less, and an average pore size of 1 Å or more and 500 Å or less. Meanwhile, as previously described, the average particle size of the liquid stabilizer atomized through the rotary atomizing unit (150) is 1 Å or more and 10 Å or less, and the average particle size of the atomized particles of the liquid stabilizer may be smaller than or equal to the average pore size of the porous silicon compound.

[0138] Accordingly, the liquid stabilizer can be easily absorbed through the pores of the porous silicon compound.

[0139] Next, in the stirring unit (310), the pre-composite stabilizer and the powder stabilizer are mixed to produce the composite stabilizer for PVC. For example, the pre-composite stabilizer and the powder stabilizer may be mixed in an amount of 50 wt% or more and 150 wt% or less.

[0140] At this time, the average particle size of the plate-shaped powder stabilizer is 50 nm (=500 Å) or larger and 500 nm (=5,000 Å) or smaller, as previously described, and the average particle size of the plate-shaped powder stabilizer may be larger than or equal to the average pore size of the porous silicon compound.

[0141] Accordingly, unlike the liquid stabilizer described above, the plate-shaped powder stabilizer may have difficulty passing through the pores of the porous silicon compound.

[0142] Accordingly, according to an embodiment of the present invention, the liquid stabilizer is absorbed through the pores of the porous silicon compound, but the powder stabilizer is not absorbed, so the exposure of the powder stabilizer to an excess amount of the liquid stabilizer can be minimized.

[0143] In addition, according to an embodiment of the present invention, as described above, the liquid stabilizer and the porous silicon compound are mixed first, and the powder stabilizer is mixed later. Since the powder stabilizer is mixed after the liquid stabilizer has been sufficiently absorbed into the porous silicon compound, the exposure of the powder stabilizer to an excess amount of the liquid stabilizer can be minimized.

[0144] Accordingly, according to an embodiment of the present invention, the aggregation phenomenon that may occur when the powder stabilizer is exposed to and mixed with an excess amount of the liquid stabilizer can be minimized, the dispersibility between the powder stabilizer and the liquid stabilizer can be improved, and the micronized particle size of the liquid stabilizer can be maintained.

[0145] Furthermore, the heat resistance of the PVC composite stabilizer can be improved by first manufacturing the above-mentioned pre-composite stabilizer and mixing the above-mentioned pre-composite stabilizer with the above-mentioned powder stabilizer.

[0147] In addition, the liquid stabilizer according to the embodiment of the present invention described above can improve the initial color, transparency, weather resistance, foaming properties, etc. of PVC, and can be harmless to the human body and environmentally friendly.

[0148] Meanwhile, the above powder stabilizer can improve the weather resistance and foaming properties of PVC.

[0149] The PVC composition according to an embodiment of the present invention includes both the liquid stabilizer and the powder stabilizer, so that the liquid stabilizer and the powder stabilizer complement each other, thereby improving colorability, weather resistance, and heat resistance.

[0150] In addition, it goes without saying that the colorability, weather resistance, and heat resistance of the PVC molded article manufactured from the above PVC composition can be improved.

[0152] Meanwhile, unlike the embodiments of the present invention, if the liquid stabilizer and the porous silicon compound are mixed in an amount of less than 2 wt%, the liquid stabilizer may not be sufficiently absorbed into the porous silicon compound. Accordingly, the powder stabilizer may be exposed to an excess amount of the liquid stabilizer.

[0153] Therefore, when the above-mentioned preliminary composite stabilizer and the above-mentioned powder stabilizer are mixed, aggregation may occur, the dispersibility between the above-mentioned powder stabilizer and the above-mentioned liquid stabilizer may decrease, and the above-mentioned finely divided particle size of the above-mentioned liquid stabilizer may not be maintained and may increase.

[0154] Alternatively, unlike the embodiments of the present invention, if the liquid stabilizer and the porous silicon compound are mixed in an amount of more than 10 wt%, the heat resistance of the composite stabilizer for PVC being manufactured may be impaired.

[0156] Meanwhile, the porous silicon compound may be any one selected from porous silica, aluminosilicate, and mixtures thereof.

[0158] Cooling section (330)

[0159] The above cooling unit (330) can cool the above stirring unit (310).

[0160] According to one embodiment, in the stirring section (310) described above, frictional heat may be generated within the stirring section (310) as the upper and lower parts within the stirring section (310) intersect due to different rotational speeds of the first and second stirring blades during the mixing of the liquid stabilizer and the porous silicon compound, and the mixing of the pre-composite stabilizer and the powder stabilizer.

[0161] Accordingly, the temperature inside the stirring part (310) can be raised by the frictional heat.

[0162] However, according to an embodiment of the present invention, the cooling unit (330) can cool the stirring unit (310) by taking into account the frictional heat.

[0163] To this end, according to one embodiment, the cooling unit (330) may be provided in a water-cooled manner on one side of the stirring unit (310).

[0164] Accordingly, the temperature inside the stirring unit (310) can be maintained at, for example, 35°C or higher and 40°C or lower.

[0166] Above, a composite stabilizer manufacturing apparatus (1000) for PVC according to an embodiment of the present invention has been described.

[0168] Meanwhile, according to one embodiment of the present invention, in addition to the liquid stabilizer, the porous silicon compound, and the powder stabilizer, the composite stabilizer may be manufactured by further adding an additive selected from plasticizers, processing aids, auxiliary stabilizers, antioxidants, UV stabilizers or UV stabilizers, flame retardants, lubricants, antistatic agents, blowing agents, fillers, antibacterial agents, colorants or pigments, antifogging agents, nucleating agents, anti-blocking agents, slip agents, and mixtures thereof.

[0169] Below, each material of the above additive will be described in detail.

[0171] The above plasticizers serve to increase the flexibility, workability, and expandability of PVC, and can be mixed to manufacture soft PVC products.

[0172] The above plasticizer may be any one selected from phthalate-based plasticizers, aliphatic-based plasticizers, trimellitate-based plasticizers, polyester-based plasticizers, epoxy-based plasticizers, phosphate-based plasticizers, glycol-based plasticizers, and mixtures thereof.

[0173] The above plasticizer may be mixed in an amount of 20 wt% or more and 40 wt% or less based on 100 wt% of PVC.

[0174] On the other hand, if the above plasticizer is mixed in an amount of less than 20 wt%, the plasticity is poor, which may increase the defect rate during the production of PVC molded products and make it difficult to manufacture soft products. Alternatively, if the above plasticizer is mixed in an amount of more than 40 wt%, the plasticity of the PVC increases, which may result in the product failing to meet the required strength.

[0176] The above processing aid can improve the processability of PVC, prevent melt fracture, reduce the occurrence of flow marks and fish eyes, and improve gloss.

[0177] The above processing aid may be at least one of an acrylic processing aid, a styrene processing aid, and an organic phosphite ester-based complex processing aid.

[0178] The above processing aid may be mixed in an amount of 0.5 wt% or more and 2 wt% or less based on 100 wt% of PVC.

[0179] On the other hand, if the above processing aid is mixed in an amount of less than 1 wt%, the surface properties and processability of the PVC may be impaired. Alternatively, if the above processing aid is mixed in an amount of more than 2 wt%, the extrusion load may increase.

[0181] The above auxiliary stabilizer can play a role in complementing the physical properties of PVC together with the above liquid stabilizer and the above powder stabilizer.

[0182] The above auxiliary stabilizer may be an organotin-based stabilizer comprising at least one of tin maleate, tin laurate, powdered tin maleate ester, and mixtures thereof.

[0183] The above auxiliary stabilizer may be mixed in an amount of 1 wt% or more and 15 wt% or less based on 100 wt% of PVC.

[0185] The above antioxidants can help maintain physical properties by inhibiting or blocking the reaction between PVC and oxygen, thereby minimizing the decomposition of PVC.

[0186] The above antioxidant may be at least one of phenolic antioxidants such as alkylthiomethylphenol, etc., and thiodipropionic acid esters.

[0187] The above antioxidant may be mixed in an amount of 0.1 wt% or more and 5 wt% or less based on 100 wt% of PVC.

[0188] On the other hand, if the above antioxidant is mixed in an amount of less than 0.1 wt%, the antioxidant effect may be negligible. Or, if the above antioxidant is mixed in an amount of more than 5 wt%, the physical properties of the PVC composition may deteriorate.

[0190] The above UV stabilizer or UV blocker can inhibit or block the thermal decomposition of PVC by ultraviolet rays.

[0191] The above-mentioned UV stabilizer or UV blocker may be azodiphenylaniline.

[0192] The above-mentioned UV stabilizer or UV blocker may be mixed in an amount of 0.5 wt% or more and 6 wt% or less based on 100 wt% of PVC.

[0193] On the other hand, if the above-mentioned UV stabilizer or UV blocker is mixed in an amount of less than 0.5 wt%, the UV blocking effect may be reduced. Alternatively, if the above-mentioned UV stabilizer or UV blocker is mixed in an amount of more than 6 wt%, mechanical properties may be reduced and manufacturing costs may increase.

[0195] The above flame retardant can reduce the combustibility of PVC by flame.

[0196] The above flame retardant may be mixed in an amount of 0.5 wt% or more and 5 wt% or less based on 100 wt% of PVC.

[0198] The above lubricant can increase fluidity by lubricating the metal surface in contact with PVC during calendering, molding, and extrusion.

[0199] The above lubricant may be mixed in an amount of 1 wt% or more and 2 wt% or less based on 100 wt% of PVC.

[0200] The above lubricant may include an internal lubricant and an external lubricant.

[0201] The above internal lubricant can reduce the generation of frictional heat by lowering the flow viscosity of the molten PVC during molding processing.

[0202] The above internal lubricant may be any one selected from butyl stearate, stearyl stearate, glycerin monostearate, stearic acid, bis-amide, lauryl alcohol, epoxidized soybean oil, and mixtures thereof.

[0203] The above external lubricant can reduce friction between the molten PVC and the processing device during molding processing and improve the release properties of the PVC from the surface of the processing device.

[0204] The above external lubricant may be any one selected from moncarbonate wax, paraffin wax, polyolefin wax, ester wax, and mixtures thereof.

[0206] The above antistatic agent can suppress or eliminate static electricity generation in PVC.

[0207] The above antistatic agent may be mixed in an amount of 1 wt% or more and 2 wt% or less based on 100 wt% of PVC.

[0209] The above blowing agent can be added to manufacture a porous PVC molded article.

[0210] The above foaming agent may be mixed in an amount of 1 wt% or more and 2 wt% or less based on 100 wt% of PVC.

[0212] The above reinforcing agent can serve as an impact modifier to improve the impact resistance of PVC, a filler to improve processability, a reinforcing filler to improve mechanical, thermal, electrical properties or processability, and an extender filler added in large quantities for the purpose of cost reduction.

[0213] The above reinforcing agent may be any one selected from inorganic, organic, and mixtures thereof, and may be selected from various forms such as powder, plate, needle, spherical, fiber, woven fabric, etc.

[0215] The above filler may be at least one of glass fiber, calcium carbonate, talc, mica, silica, and wood powder. Alternatively, the above filler may be single calcium carbonate, or a mixture in which glass fiber, talc, mica, silica, wood powder, etc. are mixed with calcium carbonate. Alternatively, the above filler may be a mixture of glass fiber and calcium carbonate in a mass ratio of 6:4.

[0216] The above glass fiber can improve the heat resistance, corrosion resistance, and tensile strength of the PVC molded product.

[0217] The above calcium carbonate has the advantages of improving the moldability of PVC, reducing wear on the mixing processing device, being easy to use due to a wide range of particle size adjustment, and having a low unit cost. In particular, when using calcium carbonate with an average particle size of less than 0.1 μm, it can disperse external impacts to strengthen the impact resistance of the PVC molded product.

[0218] The above filler may be mixed in an amount of 1 wt% or more and 30 wt% or less based on 100 wt% of PVC.

[0219] On the other hand, if the above filler is mixed in an amount of less than 1 wt%, the extrusion load may increase and production costs may rise. Alternatively, if the above filler is mixed in an amount of more than 30 wt%, the strength of the PVC molded product may decrease.

[0221] The above impact modifier can impart elasticity to PVC to reinforce impact resistance, increase fracture, tensile, compressive, bending, and impact strength, and enhance dimensional stability and resistance to thermal deformation.

[0222] The above impact modifier may be any one selected from methyl methacrylate butadiene styrene (MBS), chlorinated polyethylene, acrylic, and mixtures thereof.

[0223] More specifically, the methyl methacrylate-butadiene-styrene-based impact modifier is a copolymer obtained by graft polymerization of methyl methacrylate (MMA) and styrene monomer (SM) onto diene-based rubber, and can improve the low-temperature impact resistance and processability of PVC molded articles.

[0224] The above-mentioned chlorinated polyethylene-based impact modifier has excellent affinity with PVC, can reduce extrusion resistance, prevents damage to the cut portion during the processing of cutting the PVC molded product, and can improve light stability.

[0225] The above acrylic impact modifier can improve the weather resistance, impact resistance, and processability of PVC as a weather-resistant impact modifier used in outdoor products.

[0226] The above impact modifier can be mixed in an amount of 3 wt% or more and 5 wt% or less based on 100 wt% of PVC.

[0228] The above antimicrobial agent can improve the antimicrobial properties of PVC.

[0229] The above antimicrobial agent may be a porous composite antimicrobial agent prepared by substituting an antimicrobial metal, such as silver (Ag), copper (Cu), manganese (Mn), zinc (Zn), titanium dioxide, and mixtures thereof, into an inorganic carrier such as zeolite, silica, or alumina.

[0230] The above antimicrobial agent may be mixed in an amount of 0.1 wt% or more and 6 wt% or less based on 100 wt% of PVC.

[0232] The above-mentioned colorant or pigment can impart color to the PVC molded article.

[0233] The above coloring agent or pigment may be at least one of titanium and nickel.

[0234] The above coloring agent or pigment may be mixed in an amount of 0.2 wt% or more and 2 wt% or less based on 100 wt% of PVC.

[0235] On the other hand, if the above-mentioned coloring agent or pigment is mixed in an amount of less than 0.2 wt%, the weather resistance of the product may be reduced. Or, if the above-mentioned coloring agent or pigment is mixed in an amount of more than 2 wt%, the physical properties of the PVC molded product may be reduced and costs may be increased.

[0237] The above antifogging agent can suppress the formation of bubbles that may occur inside the PVC.

[0238] The above anti-inflammatory agent may be mixed in an amount of 0.5 wt% or more and 5 wt% or less based on 100 wt% of PVC.

[0240] According to one embodiment among the additives according to the embodiments of the present invention described above, the composite stabilizer for PVC may comprise, based on 100 wt% of PVC, 1 wt% or more and 2 wt% or less of the methyl methacrylate, 5 wt% or more and 10 wt% or less of the chlorosulfonated polyethylene, 1 wt% or more and 3 wt% or less of the stearyl stearate, 3 wt% or more and 7 wt% or less of the butyl methacrylate and methyl methacrylate mixture (mass ratio 1:2), 5 wt% or more and 15 wt% or less of the calcium carbonate, 0.5 wt% or more and 5 wt% or less of the UV stabilizer or UV blocker, and 0.1 wt% or more and 3 wt% or less of the titanium dioxide.

[0242] Meanwhile, according to one embodiment of the present invention, a PVC molded product manufacturing apparatus (2000) may be provided, which further includes at least one of a PVC composition manufacturing unit (400) and an extrusion molding unit (500) in each component of the PVC composite stabilizer manufacturing apparatus (1000) described above.

[0243] Hereinafter, a PVC molded article manufacturing apparatus (2000) according to an embodiment of the present invention is described with reference to the drawings.

[0245] FIG. 2 is a drawing for explaining a PVC molded product manufacturing apparatus according to an embodiment of the present invention.

[0246] Referring to FIG. 2, the PVC molded product manufacturing device (2000) may include at least one of a liquid stabilizer manufacturing unit (100), a powder stabilizer manufacturing unit (200), a composite stabilizer for PVC manufacturing unit (300), a PVC composition manufacturing unit (400), and an extrusion molding unit (500).

[0247] Hereinafter, each component of the above-mentioned PVC molded product manufacturing device (2000) will be described in detail.

[0248] In the following, regarding the components included in the PVC molded product manufacturing device (2000), the liquid stabilizer manufacturing unit (100), the powder stabilizer manufacturing unit (200), and the PVC composite stabilizer manufacturing unit (300), since they are identical to the components of the PVC composite stabilizer manufacturing device (1000) described above, redundant descriptions will be omitted.

[0250] PVC composition manufacturing unit (400)

[0251] In the above PVC composition manufacturing unit (400), the composite stabilizer for PVC and PVC are stirred and heat-treated at the same time to produce a PVC composition. For example, in the above PVC composition manufacturing unit (400), the composite stabilizer for PVC and PVC are stirred at 100°C for 10 minutes to produce a PVC composition.

[0252] To this end, according to one embodiment, the PVC composition manufacturing unit (400) may be a mixing device equipped with at least one of a mixer and a heater.

[0254] Meanwhile, the above PVC may be at least one selected from PVC polymerized alone with a vinyl chloride monomer, copolymer PVC copolymerized with a vinyl chloride monomer and a monomer copolymerizable to the vinyl chloride monomer, and copolymer PVC copolymerized with a vinyl chloride monomer and a polymer copolymerizable to the vinyl chloride monomer.

[0255] A monomer copolymerizable to the above vinyl chloride monomer is, for example, an olefin monomer comprising any one selected from ethylene, propylene, butylene, and mixtures thereof; a vinyl ester monomer comprising vinyl propionate; a vinyl ether monomer comprising any one selected from ethyl vinyl ether, butyl vinyl ether, and mixtures thereof; a (meth)acrylate monomer comprising any one selected from methyl (meth)acrylate, butyl (meth)acrylate, hydroxyethyl (meth)acrylate, and mixtures thereof; an aromatic vinyl monomer comprising any one selected from styrene, alpha-methyl styrene, and mixtures thereof; a halogen monomer comprising any one selected from vinyl fluoride, vinylidene fluoride, vinylidene chloride, and mixtures thereof; and an N-substituted monomer comprising any one selected from N-phenylmaleimide, N-cyclohexylmaleimide, and mixtures thereof. It may be any one selected from maleimide-based monomers and mixtures thereof.

[0256] In addition, the copolymerizable to the vinyl chloride monomer may be, for example, a polymer obtained by polymerizing the monomers described above.

[0258] In addition, the above PVC may have a degree of polymerization of 500 or more and 2,500 or less, and a K value of 50 or more and 85 or less. Here, the K value may be a method of indicating the degree of polymerization of the PVC.

[0259] On the other hand, if the degree of polymerization of the PVC is less than 500 or the K value is less than 50, the mechanical properties of the manufactured PVC composition, such as tensile strength and hardness, may be reduced. Alternatively, if the degree of polymerization of the PVC exceeds 2,500 or the K value exceeds 85, the moldability of the manufactured PVC composition is low at a normal processing temperature, and the heat resistance may be reduced when the processing temperature is increased.

[0260] However, according to an embodiment of the present invention, the PVC may have a degree of polymerization of 500 or more and 2,500 or less, and a K value of 50 or more and 85 or less, as described above, and thus the physical properties such as impact strength, weather resistance, and heat resistance of the manufactured PVC composition may be improved.

[0261] In addition, according to an embodiment of the present invention, the PVC composite stabilizer and the PVC are stirred and heat-treated to produce the PVC composition, thereby improving the mechanical properties and extrusion processability of the PVC composition.

[0262] Meanwhile, unlike the embodiments of the present invention, when only the PVC and the liquid stabilizer are stirred and heat-treated, the liquid stabilizer may cause thixotropy, pinholes, etc. in the PVC.

[0263] Here, thixotropy may refer to a phenomenon in which viscosity decreases when a shear force, such as stirring a liquid substance, is applied, and viscosity increases when no shear force is applied. Also, here, a pinhole may refer to an extremely small hole formed in a coating film.

[0264] In other words, unlike the embodiments of the present invention, when only the PVC and the liquid stabilizer are stirred and heat-treated, there is a problem in that the viscosity of the manufactured PVC composition changes easily due to external force, or small holes are formed in the manufactured PVC composition or the PVC molded product.

[0265] However, according to an embodiment of the present invention, as described above, the composite stabilizer for PVC containing the PVC, the liquid stabilizer, and the powder stabilizer can be stirred and heat-treated.

[0266] Accordingly, viscosity, moldability, and processability can be improved compared to the case where only the above PVC and liquid stabilizer are stirred and heat-treated.

[0267] Furthermore, according to an embodiment of the present invention, since the composite stabilizer for PVC includes both the liquid stabilizer and the powder stabilizer, the liquid stabilizer and the powder stabilizer can be mutually complementary.

[0268] Accordingly, impact strength, weather resistance, and heat resistance can be improved compared to when the above liquid stabilizer or the above powder stabilizer is used, respectively.

[0270] Meanwhile, according to one embodiment of the present invention, in the PVC composition manufacturing unit (400), in addition to the PVC composite stabilizer and the PVC, a chlorinated olefin polymer may be additionally provided and stirred and heat-treated simultaneously to produce a PVC composition. For example, the chlorinated olefin polymer may be any one selected from chlorosulfonated polyethylene, chlorinated ethylene vinyl acetate copolymer, chlorosulfonated ethylene vinyl acetate copolymer, chlorinated ethylene acrylic acid copolymer, chlorosulfonated ethylene acrylic acid copolymer, chlorinated ethylene methacrylic acid copolymer, chlorosulfonated ethylene methacrylic acid copolymer, chlorinated ethylene methyl acrylate copolymer, chlorinated ethylene methyl methacrylate copolymer, chlorinated ethylene n-butyl methacrylate copolymer, chlorinated ethylene glycidyl methacrylate copolymer, chlorinated graft copolymer of maleic anhydride and ethylene, chlorosulfonated copolymer of ethylene and propylene, butene, 3-methyl-1-pentene or octene, and mixtures thereof.

[0271] Accordingly, the impact resistance of the manufactured PVC can be improved.

[0273] Alternatively, according to another embodiment of the present invention, the composite stabilizer for PVC may include the liquid stabilizer and the powder stabilizer in a mass ratio of 10:1 to 1:10, respectively, and may also be used by adjusting the weight ratio according to the use of the PVC molded article being manufactured.

[0274] In addition, the liquid stabilizer and the powder stabilizer may be mixed in an amount of 0.5 wt% or more and 90 wt% or less based on 100 wt% of the PVC.

[0275] On the other hand, if the liquid stabilizer and the powder stabilizer are mixed in an amount of less than 0.5 wt%, the heat resistance of the PVC composition may be reduced. Alternatively, if the liquid stabilizer and the powder stabilizer are mixed in an amount of more than 90 wt%, blooming may occur during the manufacture of the PVC molded product.

[0277] Alternatively, according to another embodiment of the present invention, the composite stabilizer for PVC may include the liquid stabilizer and the powder stabilizer in a mass ratio of 2:3 to 3:2, respectively, and may be mixed in an amount of 3 wt% or more and 15 wt% or less based on 100 wt% of PVC.

[0279] Extrusion molding section (500)

[0280] In the extrusion molding section (500) above, the PVC composition can be extruded to produce a PVC molded product.

[0281] To this end, according to one embodiment, the extrusion molding part (500) may be a two-axis bidirectional extruder including a screw.

[0283] Above, a PVC molded article manufacturing apparatus (2000) according to an embodiment of the present invention has been described.

[0284] The PVC molded article manufacturing apparatus (2000) according to the embodiment of the present invention described above may include various types of devices such as a mixer, a calender, a dough mixer, an extruder, a mill, etc., in addition to the devices according to the embodiment described above.

[0285] In addition, the above-mentioned PVC molded product manufacturing device (2000) can be used to manufacture semi-rigid PVC products for the manufacture of decorative films, foams, sheets, tubes, office films, extrusion profiles or plates, flooring films or panel coating materials, artificial leather, automotive interior materials, etc., as well as rigid injection molded products or extrusion molded products such as containers, packaging films, thermoforming films, blown films, pipe bodies, foams, frames, etc.

[0286] As previously described, the composite stabilizer for PVC according to an embodiment of the present invention comprises both the liquid stabilizer and the powder stabilizer, and thus the impact strength, weather resistance, and heat resistance of the PVC molded article manufactured including the composite stabilizer for PVC can be improved.

[0288] Hereinafter, a method for manufacturing a composite stabilizer for PVC according to an embodiment of the present invention is described with reference to the drawings.

[0289] In the method for manufacturing a composite stabilizer for PVC described below, descriptions that overlap with the previously described composite stabilizer manufacturing device (1000) or PVC molded product manufacturing device (2000) may be omitted.

[0291] FIG. 3 is a drawing for explaining a method for manufacturing a composite stabilizer for PVC according to an embodiment of the present invention.

[0292] Referring to FIG. 3, a method for manufacturing a composite stabilizer for PVC may include at least one of a step of manufacturing a liquid stabilizer (S110), a step of manufacturing a powder stabilizer (S120), a step of manufacturing a preliminary composite stabilizer (S130), and a step of manufacturing a composite stabilizer for PVC (S140).

[0293] Below, each step will be explained in detail.

[0295] Step S110

[0296] In step S110, a liquid stabilizer can be manufactured.

[0297] In this step, before the liquid stabilizer is manufactured, the steps of preparing a liquid stabilizer source and manufacturing a base liquid stabilizer may be performed first.

[0298] Each step is explained below.

[0300] Liquid stabilizer source preparation step

[0301] A liquid stabilizer source can be prepared comprising at least one of calcium hydroxide, zinc oxide, acid, and distilled water. For example, the liquid stabilizer source may contain 10 wt% of calcium hydroxide, 3 wt% of zinc oxide, 7 wt% of acid, and 80 wt% of distilled water.

[0302] The acid in the above liquid stabilizer source may include at least one of benzoic acid, oleic acid, and citric acid. For example, among the acids included in the above liquid stabilizer source, 2 wt% of benzoic acid, 3 wt% of oleic acid, and 2 wt% of citric acid may be included.

[0303] As previously explained, among the above acids, the oleic acid may be an oily liquid.

[0304] Accordingly, the liquid stabilizer comprising at least one of the above oleic acid and the above distilled water may be in a liquid state.

[0306] Base liquid stabilizer manufacturing step

[0307] Through the first heat treatment unit (110) above, the liquid stabilizer source can be heat-treated for the first time.

[0308] As previously described, in the first heat treatment unit (110), the liquid stabilizer source may be heat-treated for a first time at a first temperature. For example, in the first heat treatment unit (110), the liquid stabilizer source may be heat-treated for a first time of 10 minutes or more and 60 minutes or less at the first temperature of 100°C or more and 150°C or less.

[0309] Through the vacuum section (130), distilled water is removed from the first heat-treated liquid stabilizer source in a vacuum atmosphere, and the base liquid stabilizer can be manufactured.

[0310] As previously described, in the vacuum section (130), the distilled water can be selectively removed from the first heat-treated liquid stabilizer source in the vacuum atmosphere.

[0311] As previously explained, the liquid stabilizer may remain in a liquid state even when the distilled water is removed, by including oleic acid, which is an oily liquid.

[0313] Liquid stabilizer manufacturing steps

[0314] Through the above-mentioned rotary atomizing unit (150), a liquid stabilizer containing particles atomized to a size smaller than the particle size constituting the base liquid stabilizer can be manufactured.

[0315] To this end, as described above, the base liquid stabilizer and the atomizing agent can be provided to the rotary atomizing unit (150) and rotated at high speed.

[0316] Accordingly, the liquid stabilizer may be manufactured by including particles that are atomized larger than the particle size constituting the base liquid stabilizer. More specifically, the liquid stabilizer may be manufactured by including atomized particles with an average particle size of 1 Å or more and 10 Å or less.

[0317] As previously described, the atomizing agent may be a mixture of PVA and an emulsifier, and the atomizing agent may be provided in an amount of, for example, 2 wt% or more and 3 wt% or less relative to 100 wt% of the base liquid stabilizer.

[0319] Step S120

[0320] In step S120, a powder stabilizer can be manufactured.

[0321] In this step, before the powder stabilizer is manufactured, the steps of preparing a powder stabilizer source and manufacturing a base powder stabilizer may be performed first.

[0322] Each step is explained below.

[0324] Powder stabilizer source preparation step

[0325] A powder stabilizer source can be prepared comprising at least one of calcium hydroxide, zinc nitrate, an organic compound, and distilled water. For example, the powder stabilizer source may contain 10 wt% of calcium hydroxide, 5 wt% of zinc nitrate, 30 wt% of the organic compound, and 55 wt% of distilled water.

[0327] Base powder stabilizer manufacturing step

[0328] Through the ultrasonic processing unit (210), the powder stabilizer source can be ultrasonically processed. As previously described, for example, in the ultrasonic processing unit (210), the powder stabilizer source can be ultrasonically processed at 100 W or more and 2,000 W or less.

[0329] Through the above hydrothermal treatment unit (230), the ultrasonically treated powder stabilizer is hydrothermally treated in a sealed state, so that a base powder stabilizer can be manufactured.

[0330] As previously described, in the hydrothermal treatment unit (230), the ultrasonically treated powder stabilizer may be provided in the hydrothermal synthesis container and hydrothermally treated while sealed. For example, in the hydrothermal treatment unit (230), the ultrasonically treated powder stabilizer may be provided in the hydrothermal synthesis container and sealed, hydrothermally treated at 120°C or higher and 220°C or lower for 5 hours or more and 12 hours or less, thereby producing the base powder stabilizer.

[0332] Powder stabilizer manufacturing steps

[0333] Through the above centrifugal separation unit (250), the base powder stabilizer can be centrifuged to obtain powder.

[0334] Meanwhile, through the second heat treatment unit (270), the powder can be heat-treated a second time to produce a powder stabilizer.

[0335] As previously described, in the second heat treatment unit (270), the powder may be heat-treated for a second time at a second temperature. At this time, the first temperature may be equal to or higher than the first temperature in the first heat treatment unit (110) described above, and the second time may be longer than the first time in the first heat treatment unit (110) described above. For example, in the second heat treatment unit (270), the powder may be heat-treated for a second time of 12 hours at the second temperature of 150°C or higher and 300°C or lower.

[0336] Accordingly, the powder stabilizer in the form of a flake can be manufactured from the powder. For example, the average particle size of the powder stabilizer in the form of a flake can be 50 nm or more and 500 nm or less.

[0338] Step S130, Step S140

[0339] In step S130, the liquid stabilizer and the porous silicon compound are mixed through the stirring unit (310), and a preliminary composite stabilizer in which the liquid stabilizer is absorbed into the porous silicon compound can be prepared.

[0340] Meanwhile, in step S140, the pre-composite stabilizer and the powder stabilizer are mixed through the stirring unit (310) to produce the composite stabilizer for PVC.

[0341] The dual-axis configuration of the stirring unit (310) and the effect of the upper and lower parts of the stirring unit (310) crossing to uniformly mix the composite stabilizer materials for PVC have been described above, so a redundant explanation at this stage will be omitted. In addition, it goes without saying that the stirring unit (310) can be cooled through the cooling unit (330).

[0343] Meanwhile, as previously described, in the stirring unit (310), the liquid stabilizer and the porous silicon compound are first mixed to produce a pre-composite stabilizer in which the liquid stabilizer is absorbed into the porous silicon compound. For example, 40 wt% or more and 150 wt% or less of the liquid stabilizer and 2 wt% or more and 10 wt% or less of the porous silicon compound may be mixed.

[0344] At this time, the porous silicon compound may have an average particle size of 0.01 μm or more and 1,000 μm or less, and an average pore size of 1 Å or more and 500 Å or less. Meanwhile, as previously described, the average particle size of the liquid stabilizer atomized through the rotary atomizing unit (150) is 1 Å or more and 10 Å or less, so it goes without saying that the liquid stabilizer can be easily absorbed through the pores of the porous silicon compound.

[0345] Next, in the stirring unit (310), the pre-composite stabilizer and the powder stabilizer are mixed to produce the composite stabilizer for PVC. For example, the pre-composite stabilizer and the powder stabilizer may be mixed in an amount of 50 wt% or more and 150 wt% or less.

[0346] At this time, the average particle size of the plate-shaped powder stabilizer is 50 nm or more and 500 nm or less, as previously described, and the average particle size of the plate-shaped powder stabilizer may be greater than or equal to the average pore size of the porous silicon compound.

[0347] Accordingly, unlike the liquid stabilizer described above, the plate-shaped powder stabilizer may have difficulty passing through the pores of the porous silicon compound.

[0348] Accordingly, according to an embodiment of the present invention, the liquid stabilizer is absorbed through the pores of the porous silicon compound, but the powder stabilizer is not absorbed, so the exposure of the powder stabilizer to an excess amount of the liquid stabilizer can be minimized.

[0349] In addition, according to an embodiment of the present invention, as described above, the liquid stabilizer and the porous silicon compound are mixed first, and the powder stabilizer is mixed later. Since the powder stabilizer is mixed after the liquid stabilizer has been sufficiently absorbed into the porous silicon compound, the exposure of the powder stabilizer to an excess amount of the liquid stabilizer can be minimized.

[0350] Accordingly, according to an embodiment of the present invention, the aggregation phenomenon that may occur when the powder stabilizer is exposed to and mixed with an excess amount of the liquid stabilizer can be minimized, the dispersibility between the powder stabilizer and the liquid stabilizer can be improved, and the micronized particle size of the liquid stabilizer can be maintained.

[0351] Furthermore, it goes without saying that the heat resistance of the PVC composite stabilizer can be improved by first manufacturing the above-mentioned pre-composite stabilizer and mixing the above-mentioned pre-composite stabilizer with the above-mentioned powder stabilizer.

[0353] Meanwhile, according to one embodiment of the present invention, a method for manufacturing a PVC molded article may be provided, which further includes at least one of a step for manufacturing a PVC composition (S150) and an extrusion molding step (S169) in each step of the method for manufacturing a composite stabilizer for PVC described above.

[0354] Hereinafter, a method for manufacturing a PVC molded article according to an embodiment of the present invention is described with reference to the drawings.

[0355] In the method for manufacturing a PVC molded product described below, descriptions that overlap with the previously described method for manufacturing a composite stabilizer for PVC (1000) or a PVC molded product (2000) may be omitted.

[0357] FIG. 4 is a drawing for explaining a method for manufacturing a PVC molded article according to an embodiment of the present invention.

[0358] Referring to FIG. 4, the method for manufacturing a PVC molded article may further include at least one of steps S110 to S140 described above, and at least one of steps S150 and S160. Regarding steps S110 to S140, a description that is redundant with the above description will be omitted.

[0359] Each step is explained below.

[0361] Step S150

[0362] In step S150, the PVC composition can be manufactured by stirring the composite stabilizer for PVC and the PVC simultaneously and heat-treating them through the PVC composition manufacturing unit (400). As previously described, for example, in the PVC composition manufacturing unit (400), the composite stabilizer for PVC and the PVC can be stirred at 100°C for 10 minutes to manufacture the PVC composition.

[0364] Step S160

[0365] In step S160, the PVC composition can be extruded through the extrusion molding unit (500) to manufacture a PVC molded product.

[0367] Above, a method for manufacturing a PVC molded article according to an embodiment of the present invention has been described.

[0368] It is obvious that the method for manufacturing a PVC molded article according to the embodiment of the present invention described above can be manufactured using various methods such as calendering, extrusion, injection molding, sintering or spinning, extrusion blow molding, or plastisol processes, in addition to the manufacturing method according to the embodiment described above.

[0370] Experimental examples of the present invention are described below.

[0372] Manufacturing of a PVC molded article according to Experimental Example 1

[0373] A liquid stabilizer source was prepared containing 10 wt% calcium hydroxide, 3 wt% zinc oxide, 2 wt% benzoic acid, 3 wt% oleic acid, 3 wt% citric acid, and distilled water.

[0374] The above liquid stabilizer source was subjected to a first heat treatment at a temperature of 100°C or higher and 150°C for a time of 10 minutes or more and 60 minutes or less, and distilled water was removed in a vacuum atmosphere to prepare a base liquid stabilizer.

[0375] A liquid stabilizer comprising 2 wt% or more and 3 wt% or less of a mixture of PVA and an emulsifier as a micronizing agent was provided to 100 wt% of the above-mentioned base liquid stabilizer and rotated at high speed to produce a liquid stabilizer comprising micronized particles having an average particle size of 1 Å or more and 10 Å or less.

[0376] A powdered stabilizer source was prepared containing 10 wt% calcium hydroxide, 5 wt% zinc nitrate, 30 wt% urea, and distilled water.

[0377] The above powder stabilizer source was ultrasonically treated at 100 W or more and 2,000 W, placed in a hydrothermal synthesis container with a built-in Teflon tube, sealed, and hydrothermally treated at a temperature of 120 ℃ or more and 220 ℃ or less for a period of 5 hours or more and 12 hours or less to produce a base powder stabilizer.

[0378] The powder obtained by centrifuging the above base powder stabilizer using a centrifuge (FLETA5, Hanil) was subjected to a second heat treatment for 12 hours at a temperature of 150°C or higher and 300°C or lower to produce a flake-shaped powder stabilizer with an average particle size of 50 nm or more and 500 nm or less.

[0379] A preliminary composite stabilizer was prepared by mixing 40 wt% of the above liquid stabilizer and 5 wt% of aluminosilicate with the above porous silicon compound, in which the above liquid stabilizer was absorbed into the above porous silicon compound.

[0380] A composite stabilizer for PVC was prepared by mixing the above-mentioned preliminary composite stabilizer and 60 wt% of the above-mentioned powder stabilizer.

[0381] A PVC composition was prepared by mixing 10 wt% of the above-mentioned composite stabilizer for PVC, 100 wt% of PVC, 1.5 wt% of methyl methacrylate ester, 7 wt% of chlorosulfonated polyethylene, 2 wt% of stearyl stearate, 5 wt% of a mixture of butyl methacrylate and methyl methacrylate (mass ratio 1:2), 10 wt% of calcium carbonate, 2 wt% of a UV blocker, and 5 wt% of titanium dioxide, and stirring at high speed using a mixer at a temperature of 100 ℃ for 10 minutes. At this time, PVC was used having a degree of polymerization of 1,300 or higher and 1,600 or lower, and a K value of 70 or higher and 74 or lower.

[0382] The above PVC composition was fed into a twin-screw bidirectional extruder (BT-50, Plastic Engineering Research Institute Co., Ltd.) with a screw diameter of 50 mm and extruded to produce a PVC molded product according to Experimental Example 1 in the shape of a pipe with a diameter of 30 mm.

[0384] Manufacturing of a PVC molded article according to Experimental Example 2

[0385] In Experimental Example 1 described above, a PVC molded article according to Experimental Example 2 was manufactured using PVC having a degree of polymerization of 1,700 or more and 2,200 or less and a K value of 74 or more and 80 or less.

[0387] Manufacturing of a PVC molded article according to Comparative Example 1

[0388] In Experimental Example 1 described above, a porous silicon compound and a powder stabilizer were mixed, and 10 wt% of a liquid stabilizer was mixed to produce a PVC molded article according to Comparative Example 1.

[0390] Manufacturing of a PVC molded product according to Comparative Example 2

[0391] In Experimental Example 1 described above, a liquid stabilizer and a porous silicon compound were not mixed, and 10 wt% of a powder stabilizer was mixed to produce a PVC molded article according to Comparative Example 2.

[0393] Manufacturing of a PVC molded product according to Comparative Example 3

[0394] In Experimental Example 2 described above, a porous silicon compound and a powder stabilizer were not mixed, and 10 wt% of a liquid stabilizer was mixed to produce a PVC molded article according to Comparative Example 3.

[0396] Manufacturing of a PVC molded product according to Comparative Example 4

[0397] In Experimental Example 2 described above, a liquid stabilizer and a porous silicon compound were mixed, and 10 wt% of a powder stabilizer was mixed to produce a PVC molded article according to Comparative Example 4.

[0399] The experimental and comparative examples described above can be summarized as shown in below.

[0400] (unit) Experiment Example 1 Experiment Example 2 Comparison Example 1 Comparison Example 2 Comparison Example 3 Comparison Example 4 Liquid stabilizer (wt%) 40 10 N / A 10 N / A Powder stabilizer (wt%) 60 N / A 10 N / A 10 Porous silicon compound (wt%) 5 N / A PVC Degree of polymerization: 1,300 or more, 1,600 or less Degree of polymerization: 1,700 or more, 2,200 or less Degree of polymerization: 1,300 or more, 1,600 or less Degree of polymerization: 1,700 or more, 2,200 or less K value: 70 or more, 74 or less K value: 74 or more, 80 or less K value: 70 or more, 74 or less K value: 74 or more, 80 or less

[0402] PVC molded products were manufactured according to the experimental and comparative examples described above, and their physical properties were evaluated.

[0403] The physical properties of the experimental examples and comparative examples can be summarized as shown in below.

[0404] (unit) Experiment Example 1 Experiment Example 2 Comparison Example 1 Comparison Example 2 Comparison Example 3 Comparison Example 4 Impact strength (kJ / m²) 2 ) Standard temperature 21.6 26.7 10.2 13.1 13.3 16.7 low temperature 9.3 12.9 5.1 6.3 7.3 8.5 Weather resistance (L*a*b*) 1.45 1.02 2.71 2.73 1.92 1.95 Initial pigmentation (L*a*b*) 3.17 2.97 8.91 8.37 5.43 5.31 Heat resistance (L*a*b*) 12.3 10.1 16.3 16.0 14.7 14.8

[0406] Impact strength evaluation

[0407] Impact strength was evaluated for PVC molded products manufactured according to experimental examples and comparative examples.

[0408] Impact strength tests were performed for 24 hours each at a standard temperature (23 ±2 ℃) and a low temperature (-10 ±1 ℃) in accordance with KS M 3056.

[0409] According to KS F 5602, the impact strength is 12.7 kJ / m² at standard temperature. 2 That is the end, and 4.9 kJ / m at low temperature 2 If the above is true, it is a pass.

[0411] Weather resistance evaluation

[0412] For PVC molded products manufactured according to experimental examples and comparative examples, weather resistance was evaluated in accordance with KS F 2274.

[0413] The spray cycle was set to 20 minutes using a XENON-ARC type device, and PVC molded products prepared according to experimental examples and comparative examples were exposed for 1,000 hours at a temperature of 63 ±3 ℃, and the color difference change of the specimens (unit: L*a*b*) was measured using a colorimeter.

[0414] According to KS F 5602, weather resistance is accepted only if there is no significant discoloration.

[0416] Initial coloration evaluation

[0417] To determine whether the PVC molded products manufactured according to the experimental and comparative examples were initially colored, the color difference values ​​(unit: L*a*b*) were checked using a CR-400 colorimeter.

[0419] Heat resistance evaluation

[0420] Heat resistance was evaluated for PVC molded products manufactured according to experimental examples and comparative examples.

[0421] Two PVC molded products manufactured according to the experimental examples and comparative examples were prepared for each, and heated at 200°C, with the specimens collected after 10 minutes and 30 minutes, and the color difference (unit: L*a*b*) between the specimen heated for 10 minutes and the specimen heated for 30 minutes was evaluated.

[0423] Referring to , it can be seen that the impact strength of the PVC molded articles manufactured according to Experimental Examples 1 and 2 of the present invention is significantly higher than that of the comparative examples, by more than 2 times.

[0424] Accordingly, it can be seen that when both a liquid stabilizer and a powder stabilizer are included according to the experimental example of the present invention, the impact strength can be improved compared to when the liquid stabilizer and the powder stabilizer are included separately according to the comparative example.

[0425] In addition, the results of the weather resistance, initial coloring, and heat resistance evaluation of the PVC molded articles manufactured according to Experimental Examples 1 and 2 show that there is not a significant difference in color compared to the comparative examples.

[0426] As previously explained, when the porous silicon compound is included according to the experimental example of the present invention, the exposure of the powder stabilizer to an excess amount of the liquid stabilizer by the porous silicon compound is minimized, so it can be seen that it maintains above the acceptance criteria in terms of weather resistance, initial coloration, and heat resistance.

[0427] Accordingly, it was confirmed that the physical properties of the PVC molded articles prepared according to Experimental Examples 1 and 2, which included both liquid stabilizers and powder stabilizers, were significantly improved compared to the comparative examples using liquid stabilizers and powder stabilizers, respectively.

[0428] In particular, it was confirmed that the composite stabilizer for PVC according to the experimental example of the present invention significantly improves the physical properties of PVC having a high degree of polymerization and high molecular weight.

[0430] Hereinafter, with reference to FIG. 5, a rotary atomizing unit (150) according to an embodiment of the present invention will be described in more detail. FIG. 5 is a drawing for describing a rotary atomizing unit according to an embodiment of the present invention in more detail. Redundant descriptions of the rotary atomizing unit (150) described above with reference to FIG. 1 to FIG. 4 will be omitted.

[0431] Referring to FIG. 5, the rotary atomizing unit (150) may include a first housing (152) and a second housing (156).

[0432] The first housing (152) may be a receiving container for high-speed rotation while a micronizing agent is provided to the base liquid stabilizer. At this time, the first housing (152) may have a structure that is narrow at the top and wide at the bottom, with a wide bottom (L2) and a narrow top (L1), in order to facilitate the micronization of the base liquid stabilizer provided in oil form. A pout port (154) for pouting the micronized base liquid stabilizer may be provided at the top of the first housing (152). The pout port (154) may have a shape that slopes upward as it extends from the inside to the outside of the first housing (152). Accordingly, when a low-density base liquid stabilizer is micronized by rotation, it can be quickly pouted through the pout port (154).

[0433] The second housing (156) may be provided on the outside of the first housing (152) with a predetermined distance between them. The second housing (156) may have a shape corresponding to that of the first housing (152). The second housing (158) may have a collection port (158) at the bottom to collect the atomized base liquid stabilizer obtained through the acquisition port (154). The atomized base liquid stabilizer collected through the collection port (158) may be supplied to the stirring unit (310) of the PVC composite stabilizer manufacturing unit (300) described above.

[0434] At this time, the second housing (156) may receive ultrasonic waves to maintain the fine phase obtained through the acquisition port (154). That is, the ultrasonic application unit can maintain the fine state of the base liquid stabilizer by applying ultrasonic waves to the outer surface of the second housing (156).

[0435] Additionally, the second housing (156) may rotate at a different speed from the first housing (152) to facilitate the smooth collection of the atomized liquid stabilizer passing through the acquisition port (154). More specifically, the first housing (152) may rotate at a high speed (R1) for atomization, and the second housing (156) may rotate at a low speed (R2). Conversely, if the second housing (156) does not rotate, the atomized liquid stabilizer passing through the acquisition port (154) may be directed toward the same part of the inner wall of the second housing (156), and there is a risk of aggregation occurring between the atomized base liquid stabilizers. However, in one embodiment of the present invention, since the second housing (156) rotates, the atomized liquid stabilizer passing through the acquisition port (154) is directed toward a different part rather than the same part of the inner wall of the second housing (156), thereby allowing the atomized state to be continuously maintained.

[0436] According to one embodiment described above with reference to FIG. 5, the composite stabilizer for PVC described above with reference to FIG. 1 to FIG. 4 can be manufactured with a higher yield.

[0438] Although the present invention has been described in detail using preferred embodiments, the scope of the invention is not limited to specific embodiments and should be interpreted by the appended claims. Furthermore, those skilled in the art will understand that many modifications and variations are possible without departing from the scope of the invention.

[0439] Furthermore, the devices and materials described above are not limited to the scope and types specified above and can, of course, be easily modified. Explanation of the symbols

[0441] 100: Liquid Stabilizer Manufacturing Department 110: 1st Heat Treatment Unit 130: Vacuum section 150: Rotating atomizer 200: Powder Stabilizer Manufacturing Department 210; Ultrasonic processing unit 230: Sequence processing unit 250: Centrifuge 270: 2nd Heat Treatment Division 300: Manufacturing Department of Composite Stabilizers for PVC 310: Stirring section 330: Cooling unit 400: PVC Composition Manufacturing Department 500; Extrusion molding part 1000: Manufacturing device for composite stabilizers for PVC 2000: PVC molded product manufacturing device

Claims

Claim 1 A liquid stabilizer manufacturing unit comprising: a first heat treatment unit comprising a first heater for first heat treating a liquid stabilizer source comprising calcium hydroxide, zinc oxide, an oily acid, and distilled water at a first temperature for a first time; a vacuum unit for removing distilled water from the first heat-treated liquid stabilizer source in a vacuum atmosphere formed by a rotary pump to produce the oily acid-based base liquid stabilizer; and a rotary atomization unit comprising a high-speed rotating shaft for producing a liquid stabilizer comprising particles atomized to a size smaller than the particle size constituting the base liquid stabilizer by providing an atomizing agent to the base liquid stabilizer and rotating it at high speed; an ultrasonic treatment unit comprising an ultrasonic device for ultrasonically treating a powder stabilizer source comprising calcium hydroxide, zinc nitrate, an organic compound, and distilled water; a hydrothermal treatment unit comprising a hydrothermal synthesis vessel containing a Teflon tube for hydrothermally treating the ultrasonically treated powder stabilizer in a sealed state to produce a base powder stabilizer; and centrifuging the base powder stabilizer. A powder stabilizer manufacturing unit comprising a centrifugation unit including a centrifugal separator for centrifugation, and a second heat treatment unit including a second heater for manufacturing a powder stabilizer by centrifuging the base powder stabilizer and performing a second heat treatment for a second time longer than the first time at a second temperature equal to or higher than the first temperature; and a pre-composite stabilizer in which the liquid stabilizer is absorbed into the porous silicon compound by mixing the liquid stabilizer and the porous silicon compound, and a PVC (polyvinyl chloride;A PVC composite stabilizer manufacturing unit comprising: a stirring unit comprising a two-axis mixing device including a first rotating shaft rotating at a first speed, a first stirring blade coupled to the first rotating shaft and rotating in tandem, and a second rotating shaft rotating at a second speed faster than the first speed and a second stirring blade coupled to the second rotating shaft and rotating in tandem, and a cooling unit provided in a water-cooling manner on one side of the stirring unit to cool the stirring unit, for manufacturing a composite stabilizer for polyvinyl chloride;Including, wherein the first speed of the first rotation axis is 7,000 rpm and the second speed of the second rotation axis is 12,000 rpm, and by the different speeds of the first rotation axis and the second rotation axis, high uniformity is provided for the mixing between the liquid stabilizer and the porous silicon compound, the mixing between the pre-composite stabilizer and the powder stabilizer, and the mixing of additives, and the cooling unit maintains the temperature of the stirring unit at 35°C or higher and 40°C or lower, and the rotary atomizing unit includes a first housing and a second housing provided at a predetermined distance from the first housing, and the first housing rotates at a first rotation speed while a atomizing agent is provided to the base liquid stabilizer to atomize the particle size constituting the base liquid stabilizer, and has a receiving port for obtaining the atomized liquid stabilizer, the first housing has a shape of a wide bottom and a narrow top, and the receiving port extends upward as it goes from the inside to the outside of the first housing. A PVC composite stabilizer manufacturing apparatus having an inclined shape, wherein the second housing rotates at a second rotational speed slower than the first rotational speed of the first housing so as to change the collection position of the atomized liquid stabilizer passing through the acquisition port of the first housing, and ultrasonic waves that vibrate the wall surface of the second housing are applied to the second housing through the wall of the second housing so as to maintain the atomized state of the atomized base liquid stabilizer, and the second housing includes a collection port for collecting the atomized liquid stabilizer, and the liquid stabilizer collected from the collection port is supplied to the stirring unit, wherein the second housing is driven independently of the rotational axis of the first housing, and the second housing continuously rotates to vary the impact point of the atomized liquid stabilizer so as not to collide with the same part of the inner wall of the second housing. Claim 2 A manufacturing apparatus for a composite stabilizer for PVC according to claim 1, wherein the powder stabilizer has a flake shape, the average particle size of the micronized particles of the liquid stabilizer is smaller than or equal to the average pore size of the porous silicon compound, and the average particle size of the flake-shaped powder stabilizer is larger than or equal to the average pore size of the porous silicon compound.

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