KR101033829B1 - Method for manufacturing resin pipe improved weather proof and tensile strength property - Google Patents

Abstract

PURPOSE: A method for manufacturing a resin pipe is provided to prevent the deformation caused by external environment while not lowering impact strength, tensile strength and flexural strength. CONSTITUTION: A method for manufacturing a resin pipe comprises the steps of: manufacturing a resin composition; mixing pure water, the resin composition, dispersing agent and water-soluble thickener in a reactor; filling the inside of the reactor with nitrogen and performing emulsification through mixing; controlling the temperature of the reaction bath and adding a polymerization initiator; removing unreacted materials and dehydrating the mixture to obtain a vinylchloride resin; extrusion-molding the vinylchloride resin to prepare a resin pipe; and heating the resin pipe with hot air of 40~60 °C for 50~100 seconds.

Description

Method for manufacturing resin pipe improved weather proof and tensile strength property

The present invention relates to a method for producing a resin tube that can be used for a long time by improving the weather resistance and tensile strength properties in order to prevent degradation of the mechanical properties and deformation during long-term storage of the resin tube.

In general, most of the resin pipes used in industrial sites are manufactured by extruding polyvinyl chloride (PVC) resins. The vinyl chloride resin composition has excellent mechanical strength, low friction resistance, chemical resistance, and electrical insulation. As it is light, easy to install, and low in cost, it is widely used in various fields such as pipes, building materials, wire coating, and film.

However, vinyl chloride-based resin pipes have low strength at high temperatures and low temperatures, and have a disadvantage in that aging proceeds rapidly when subjected to direct sunlight for long periods of time. Therefore, the use of vinyl chloride resin pipes is limited to high temperature piping such as heating. As a result of the change, there is a problem of discoloration or deterioration of the physical properties to bend or deform.

In order to solve the above problems, there is a method of increasing the heat resistance by mixing additives such as a heat stabilizer with a vinyl chloride-based resin composition, but increasing the heat resistance lowers the strength, and when the strength is supplemented, the impact resistance is lowered. Difficulties in improving the overall physical properties of the resin tube.

In an attempt to solve the above problems, Korean Patent No. 0766773 improves tensile strength and weather resistance by mixing an additive including a vinyl chloride-ethylene vinyl acetate (VC-EVA) copolymer with a polyvinyl chloride resin. A resin composition is disclosed.

The resin composition improves the compatibility between the compositions to improve the tensile strength and weather resistance, but the heat resistance and flexural strength is insufficient to be bent or deformed by sunlight and temperature when loaded in the open air for a long time it is difficult to store outdoors.

As another solution to solve the above problem, US Patent No. 6366379 discloses a reflector in which a layer having low solar absorption is formed on a surface.

The reflector is composed of an infrared reflecting layer made of a resin composition and multiple layers of an infrared penetrating layer. An infrared reflecting layer having a higher reflectance to sunlight in the infrared range is formed on the surface of the infrared penetrating layer to reduce deterioration due to sunlight. Indicates.

However, the reflector is prone to damage of the infrared reflecting layer during handling, and the damage not only accelerates the deterioration by exposing the infrared penetrating layer to the outside, but also requires the manufacture of two layers, which makes the manufacturing process complicated and increases the manufacturing cost. The problem arises.

The problem to be solved by the present invention is to provide a method for producing a resin tube does not deteriorate mechanical properties due to external environment even if the vinyl chloride resin tube is stored for a long time.

In order to achieve the above object, the present invention, 100 parts by weight of polyvinyl chloride, 20 to 60 parts by weight of chlorinated polyvinyl chloride, 3 to 10 parts by weight of stabilizer, 1 to 5 parts by weight of processing aid, 0.1 to 3.0 parts by weight of metal soap, Mixing a resin composition comprising 0.1 to 3.0 parts by weight of a lubricant, 1 to 5 parts by weight of a filler, 1 to 10 parts by weight of an impact modifier, and 0.01 to 2.00 parts by weight of an antimicrobial agent; Incorporating pure water, the resin composition, the dispersant, and the water-soluble thickener into the jacketed reactor; Removing oxygen in the reactor, filling with nitrogen, and then emulsifying by stirring; Reacting by controlling a temperature with a jacket and adding a polymerization initiator to the reactor; Removing unreacted substances in the reactants and dehydrating to obtain a vinyl chloride resin; Manufacturing a resin pipe by extruding the vinyl chloride resin; It provides a method for producing a resin tube with improved weather resistance and tensile strength; and the step of heating the prepared resin tube for 50 to 100 seconds with hot air of 40 ~ 60 ℃.

delete

delete

delete

The resin tube according to the present invention can be used while being stored for a long time after the production is improved because the weather resistance is improved and the deformation by the external environment is prevented without deterioration of physical properties such as impact strength, tensile strength and flexural strength even during long-term loading in the open air. .

The resin composition according to the present invention is 100 parts by weight of polyvinyl chloride (PVC), 20 to 60 parts by weight of chlorinated polyvinyl cloride (CPVC), stabilizer 3 to 10 parts by weight, processing aid 1 to 5 parts by weight It includes 0.1 to 3.0 parts by weight of metal soap, 0.1 to 3.0 parts by weight of lubricant, 1 to 5 parts by weight of filler, 1 to 10 parts by weight of impact modifier, and 0.01 to 2.00 parts by weight of antibacterial agent.

The resin composition according to the present invention is a kind of thermoplastic plastics, which is made of polyvinyl chloride, which is widely used because of its easy coloring, relatively hardness, and excellent moldability.

The polymerization degree of polyvinyl chloride in the present invention is preferably in the range of 500 to 2500. If the polymerization degree is less than 500, mechanical properties such as tensile strength and hardness are lowered, and if the polymerization degree is greater than 2500, molding is difficult and processing at a general processing temperature. Increasing the temperature is not preferable because the thermal stability is lowered.

Chlorinated polyvinyl chloride is a white powder with-(CHCl-CHCl) n- molecular structure, which has good tensile strength, flame retardancy, chemical resistance, and electrical insulation, and has a higher deformation temperature by 20 ~ 35 ℃ than polyvinyl chloride. Excellent thermal properties

In particular, it is excellent in weather resistance and heat resistance, which are weak points of polyvinyl chloride, and exhibits high durability to various acids, basic wastewater, and the like, so that it can be used semi-permanently after installation and does not generate scale.

In the present invention, it is preferable that 20 to 60 parts by weight of the chlorinated polyvinyl chloride is mixed with respect to 100 parts by weight of polyvinyl chloride. If it is less than 20 parts by weight, complementary effects such as tensile strength, weather resistance and heat resistance cannot be expected, and 60 parts by weight. If it exceeds, manufacturing cost will become high and it is unpreferable.

Polyvinyl chloride is easily decomposed or deteriorated by heat during the molding process, and also has a very low crystallinity, so that it is decomposed by light and heat during storage, is colored yellow or brown, broken well, and has a weak disadvantage in heat.

Particularly, when polyvinyl chloride is heated, chlorine in the side chain is cleaved to generate hydrochloric acid, and the hydrochloric acid generated as a catalyst promotes decomposition, so that decomposition reactions occur in series, thereby rapidly deteriorating physical properties.

Therefore, in order to prevent this, a stabilizer is added, and there are thermal stabilizers and light stabilizers.

The heat stabilizer prevents carbonization, coloring, and decomposition of polyvinyl chloride by heat during processing by increasing the stability to heat, inhibits the generation of frictional heat, facilitates mold release, and weather resistance and light stability of the resin tube manufactured. To improve the function.

Examples of the thermal stabilizer include organotin stabilizers such as organotin mercapto, organotin maleate, and organotin laurate; Lead-based stabilizers such as lead stearate, dibasic lead phosphite and tribasic lead acid; Calcium-zinc stabilizers; Barium-zinc stabilizers; Barium-cadnium-based stabilizer may be mentioned as an example, one or two or more may be used in combination, but the present invention is not limited thereto.

In addition, the vinyl chloride-based resin tube is deteriorated by deterioration of the polymerization ring by the light deterioration action by ultraviolet rays, so that a light stabilizer is added to prevent this.

As the light stabilizer, an ultraviolet absorber such as salicylic acid ester-based, benzophenone-based, benzotriazole-based, cyanoacrylate-based, or a hindered amine-based light stabilizer may be used. And, one or two or more may be used in combination, but the present invention is not limited thereto.

The stabilizer may be used both a heat stabilizer and a light stabilizer, and may be used any one of them if necessary, it is preferable to mix 3 to 10 parts by weight with respect to 100 parts by weight of polyvinyl chloride, if less than 3 parts by weight thermal stability If this is reduced and carbonization of the resin occurs during processing or the effect is insufficient in terms of light resistance and exceeds 10 parts by weight, it is not preferable because problems such as blooming occurs.

Processing aids are formulated with relatively small amounts to improve processability, prevent melt fracture, reduce flow marks and fish eyes, improve gloss and improve physical properties without significantly affecting physical properties. It is a substance used for.

In the present invention, as the processing aid, an acrylic, styrene or organoarylene ester-based complex processing aid is preferable, and a processing aid having a molecular weight of 500,000 to 3,000,000, in which polymethyl methacrylate (PMMA) is a main component, is more preferable.

The processing aid is preferably mixed 1 to 5 parts by weight with respect to 100 parts by weight of polyvinyl chloride, when less than 1 part by weight is insufficient surface properties, processability and compatibility, and exceeds 5 parts by weight extrusion load is high and production cost Is not preferable because it rises.

Metal soap is a metal salt of fatty acid, has a high melting point, wear resistance, pressure resistance, lubrication characteristics, and in particular, provides an effect of improving the tensile strength and tear strength of the resin composition.

The metal contained in the metal soap is not particularly limited, but is preferably dissolved in a polar solvent such as water and is not dissociated into ions. Such metals include aluminum, iron, titanium, or cobalt metal soap.

The metal soap is preferably added 0.1 to 3.0 parts by weight based on 100 parts by weight of polyvinyl chloride, if less than 0.1 parts by weight of metal soap addition effect such as tensile strength is less than 3.0 parts by weight because the production cost rises Not desirable

The lubricant added to the resin composition of the present invention may be classified into an internal lubricant and an external lubricant, and the internal lubricant is used for the purpose of preventing frictional heating by lowering the flow viscosity of the dissolved resin during molding. It is used to reduce friction between molten resin and processing equipment and to promote release from the surface of processing equipment.

The internal lubricants include butyl stearate, lauryl alcohol, stearyl stearate, epoxidized soybean oil, glycerin monostearate, stearic acid, bis-amide, and the like. , Polyolefin wax, ester wax, and the like, and may be used alone or in combination of two or more, but the present invention is not limited thereto.

The lubricant is preferably mixed 0.1 to 3.0 parts by weight with respect to 100 parts by weight of polyvinyl chloride, if less than 0.1 parts by weight does not exhibit lubrication action and exceeds 3.0 parts by weight lubrication performance no longer increases as well as paintability It is not preferable because back surface workability is lowered.

Fillers are broadly classified into two types: extender fillers for cost reduction and reinforcing fillers added to improve mechanical, thermal, electrical properties, or processability. It is classified into inorganic and organic according to, and classified into powder, flat, needle, spherical, fibrous and fibrous fabrics according to shape.

As the filler used in the present invention, glass fiber, calcium carbonate, talc, mica, silica, wood flour, and the like are preferable. Among them, calcium carbonate is more preferable, but the present invention is not limited thereto.

The calcium carbonate is inexpensive, improves moldability, reduces the wear of the mixing and processing apparatus, and has a wide range of particle size adjustment, which is easy to use. In particular, calcium carbonate having a particle size of less than 0.1 μm has a small particle size. Disperses the impact applied to the outside of the resin tube to be manufactured to enhance the impact resistance.

1 to 5 parts by weight of the filler is preferably mixed with respect to 100 parts by weight of polyvinyl chloride, and when used in less than 1 part by weight, the extrusion load is increased, the production cost is increased, and the strength is lowered when it exceeds 5 parts by weight. Not.

The impact modifier is a material that reinforces the impact resistance by imparting elasticity to the resin composition. The impact modifier can increase the cleavage, tension, compression, warpage, impact strength, and obtain an effect of enhancing dimensional stability and resistance to thermal deformation. Methyl methacrylate butadiene styrene, chlorinated polyethylene and acrylic reinforcing agents are used alone or in combination.

Methyl methacrylate butadiene styrene (MBS) impact modifiers are airs obtained by graft reaction of methyl methacrylate (MMA) and styrene monomer (SM) to diene rubber. It is used in polyvinyl chloride products as a coalescer, and it shows strong resistance to low temperature impact and improves processability.

The chlorinated polyethylene impact modifier has an effect of reducing extrusion resistance by its excellent affinity with polyvinyl chloride, prevents breakage of the cutting part when cutting the resin pipe, and has a strong resistance to sunlight.

Acrylic impact modifiers are weather resistant impact modifiers used in outdoor products, and have an effect of improving weather resistance, impact resistance and processability of thermoplastic resins including polyvinyl chloride.

The impact modifier is preferably mixed 1 to 10 parts by weight with respect to 100 parts by weight of polyvinyl chloride, if less than 1 part by weight can not be expected to improve the impact resistance, when exceeding 10 parts by weight extruded in the tubular molding extruded high production This is undesirable because the cost increases.

The antimicrobial agent is added to prevent corrosion by microorganisms of the resin tube and to give antimicrobial properties. The antimicrobial agents are classified into organic antimicrobial agents and inorganic antimicrobial agents.

Organic antimicrobials have been used a lot of organic antimicrobials such as methyl parabens and propyl parabens to date because they are relatively easy to process and do not significantly affect the mechanical properties, transparency and color of the final product.

However, as the stability of the organic antimicrobial agent is a problem to the human body, the inorganic antimicrobial agent that can supplement the disadvantages of the organic system is attracting attention, the inorganic antimicrobial agent such as silver (Ag), copper (Cu), manganese (Mn), zinc (Zn), etc. Some metals having excellent antibacterial properties and inorganic carriers such as zeolite and silica alumina are substituted with ions of the metal to have a three-dimensional skeletal structure with fine pores, so that the specific surface area is large and the heat resistance is excellently processed.

Metals that are toxic to microorganisms are generally very toxic to humans, but metals such as silver, copper, manganese, and zinc are one of the few metals with strong antibacterial activity and high stability. Examples of the inorganic antimicrobial agents include zirconium phosphate silver ion antimicrobial agents or antimicrobial agents in the form of Ag / SiO ₂ powder.

The antimicrobial agent is preferably mixed with 0.01 to 2.00 parts by weight based on 100 parts by weight of polyvinyl chloride, less than 0.01 parts by weight of the antimicrobial activity is hardly exhibited, if more than 2.00 parts by weight of the antimicrobial effect does not increase any more to increase the manufacturing cost This is undesirable.

When the resin composition is prepared as described above it is reacted to produce a vinyl chloride-based resin, an example thereof is as follows.

In a jacketed reactor, pure water, a resin composition containing polyvinyl chloride prepared above, a dispersant, a water-soluble thickener, and a polymerization degree regulator are added as necessary, and the inside of the reactor is decompressed to remove oxygen, followed by nitrogen atmosphere filled with nitrogen. The mixture is sufficiently emulsified by stirring, the reaction tank is adjusted to a suitable temperature with a jacket, and then reacted by adding a polymerization initiator.

By changing the jacket temperature, the temperature in the reaction vessel, that is, the reaction temperature can be controlled, and after completion of the reaction, unreacted substances are removed, made into a slurry, and dehydrated to obtain a vinyl chloride resin.

The dispersant improves the dispersion stability of the resin composition and can be efficiently carried out polymerization, there is no particular limitation on the kind, for example, poly (meth) acrylate, (meth) acrylate-alkyl acrylate copolymer , Methyl cellulose, ethyl cellulose, hydroxypropyl methyl cellulose, polyethylene glycol, polyvinyl acetate, polyvinylpyrrolidone, starch, styrene anhydride copolymer or the like may be used alone or in combination of two or more thereof.

Examples of the water-soluble thickeners include poly (meth) crylic acid, alkyl (meth) acrylates, (meth) crylic acid copolymers, casein and metal salts thereof.

Examples of the polymerization degree regulator include chain transfer agents such as melcapto methanol, melcapto ethanol and melcapto propanol; And crosslinking agents such as divinylbenzene and ethylene glycol dimethacrylate.

The polymerization initiator is not particularly limited in kind, but a radical polymerization initiator that is more advantageous for polymerization is preferable, for example, lauroyl peroxide, t-butyl peroxy fiberrate, diisopropyl peroxy carbonate, dioctyl peroxy di Organic peroxides such as carbonate, t-butyl peroxy neodicanoate and a-millyl peroxy neodecanoate; Azo compounds, such as 2, 2- azobis isobutylonitrile and 2, 2- azobis 2, 4- dimethyl pareronitrile, etc. are mentioned.

Next, the resin tube is manufactured by molding the prepared vinyl chloride-based resin, and the method of molding is not particularly limited, and examples thereof include an extrusion molding method, an injection molding method, a calender molding method, a press molding method, and the like. In order to manufacture in the form of a tube as in the usual extrusion molding method is used, it is also possible to be molded into a plate or other various shapes depending on the application.

The manufactured resin tube is preferably to minimize the residual stress generated during extrusion molding, and if the residual stress of the resin tube is reduced, it is possible to prevent deformation such as distortion during long-term storage.

As a method of minimizing residual stress, there is a method of maintaining a long cooling time by lowering a cooling rate during cooling. Since the extrusion molding temperature of a general vinyl chloride resin tube is 150 to 160 ° C, hot water of 50 to 90 ° C is used as cooling water. The cooling rate can be lowered.

As another method of minimizing the residual stress, the residual stress may be removed by heat treatment after the resin tube is manufactured.

When heat-treating the manufactured resin tube, the molecular arrangement may be rearranged in a direction in which the stress of the resin tube is eliminated, and residual stress may be removed. In general, a vinyl chloride resin tube may be softened at 70 to 80 ° C. Residual stress removal effect can be obtained by adding hot air at 40 ~ 60 ℃ for 50 ~ 100 seconds.

Hereinafter, the present invention will be described in more detail based on the following Examples, Comparative Examples and Test Examples.

However, the following examples are only for illustrating the present invention, and the present invention is not limited by the following examples, and may be changed to other embodiments equivalent to substitutions and equivalents without departing from the technical spirit of the present invention. Will be apparent to those of ordinary skill in the art.

≪ Example 1 >

1) Preparation of Vinyl Chloride Resin

Pure water was filled in the reaction tank with a jacket, and then 100 kg of polyvinyl chloride as a resin composition, 40 kg of chlorinated polyvinyl chloride, 3 kg of organotin mercapto-based heat stabilizer, 3 kg of salicylic acid ester-based light stabilizer, and PMMA processing aid 3 1 kg of aluminum metal soap, 1 kg of paraffin wax lubricant, 3 kg of calcium carbonate filler, 5 kg of MBS impact modifier, and 1 kg of zirconium phosphate-based antibacterial agent were added at once, and polyoxyethylene nonylphenyl ether ammonium sulfate as a dispersant ( After adding an appropriate amount of polyoxyethylene nonyl phenyl ether amonium sulphate), the inside of the reactor was decompressed to remove oxygen, and then sufficiently emulsified by stirring in a nitrogen atmosphere filled with nitrogen, and the temperature of the reactor was raised to 75 ° C. with a jacket. The reaction was performed by adding ammonium persulphate.

When the pressure in the reactor reached 4.5g / cm ² to cool the reactor, to remove the unreacted material and then dehydrated to dry to prepare a vinyl chloride-based resin.

2) Resin pipe production

To 100 kg of the resin prepared above, 0.8 kg of organotin stabilizer, 0.5 kg of polyethylene lubricant, 0.2 kg of stearic acid and 0.5 kg of calcium stearate were stirred and mixed in a super mixer (100L, manufactured by Kawata, Japan), and then screw diameter 50 mm. Was supplied to a biaxial two-way extruder (BT-50, manufactured by Plastic Engineering Research Institute of Japan, Japan), and a continuous molding of a resin tube with a diameter of 60 mm was made. The extrusion of the resin tube was cooled using water at room temperature. It was.

<Example 2>

A resin tube was manufactured in the same manner as in Example 1, except that the cooling of the resin tube during extrusion molding was performed by using hot water at 70 ° C.

<Example 3>

A resin tube was manufactured in the same manner as in Example 1, except that 50 ° C. hot air was applied to the resin tube manufactured and cooled in Example 1 for 1 minute.

Comparative Example 1

A resin tube was manufactured in the same manner as in Example 1, except that chlorinated polyvinyl chloride was not added to the resin composition in Example 1.

Comparative Example 2

A resin tube was manufactured in the same manner as in Example 1, except that metal soap was not added to the resin composition in Example 1.

<Test Example 1>

Impact strength, tensile strength, flexural strength, and accelerated weather resistance were measured for the resin pipes prepared in Examples and Comparative Examples.

Five samples of each group after 30 minutes of molding time were collected from the molded resin tubes, and used as samples. The average values are shown in Table 1 below.

Measurement result of resin pipe unit Example Comparative example One 2 3 One 2 Charpy Impact ^{Note 1)} ㎏ _f ㆍ cm / ㎠ 26 27 26 25 26 Tensile Strength ^{Note 2)} ㎏ _f / ㎠ 527 531 524 512 486 Flexural Strength ^{Note 3)} ㎏ _f / ㎠ 26000 26400 26300 24300 24600 Promoting weather resistance4 ⁾ ΔE 12.8 9.1 10.7 17.4 15.0

Note 1) JIS K 7111

Note 2) JIS K 7I13, measuring temperature 20 ℃

Note 3) KS M ISO1209-2

Note 4) KS M 5000

In Table 1, Charpy impact value means the degree of endurance without damage to the impact applied from the outside, in order to sufficiently endure in low temperature environment, such as cold districts, the Charpy impact value of the resin tube is 25kg _f ㆍ cm / cm ² or more It is preferable.

In addition, in the case of tensile strength, 500kg _f / cm ² or more is preferable when used for water supply, but less than 500kg _f / cm ² is insufficient pulsation resistance, there is a risk of breakage during use, the bending strength is the degree of elasticity against bending It is a numerical value that represents the ratio of the deformation to the load applied to the object, which means that the larger this value, the smaller the deformation.

Accelerated weathering is an experiment that promotes weather-resistant conditions, and sets conditions exposed to external environments such as UV, water, and wind to form more severe conditions than actual climate, and changes the color of samples after testing. As a method of inspecting changes in coating peeling, choking, cracking, etc., the lower the value, the better the weather resistance.

As a result of the test, the Charpy impact value was not significantly different between the Examples and Comparative Examples, but the tensile strength was lower in Comparative Example 2 without the addition of metal soap, and the flexural strength was higher than that of the Comparative Example. It was confirmed that Example 2 cooled by and Example 3 to which hot air was added were higher than Example 1 cooled by water at room temperature, and thus the degree of deformation due to external force was small.

In addition, weather resistance was found to be excellent in the order of Example 2> Example 3> Example 1> Comparative Example 2> Comparative Example 1.

The improved weather resistance means that there is no change in mechanical properties such as tensile strength and no change in appearance even after long-term use, and thus the effect of improving the weather resistance and tensile strength of the resin tube according to the present invention was confirmed.

<Test Example 2>

The resin tubes prepared in Examples and Comparative Examples were taken in each group, cut into 5m lengths, and then supported on both ends of the resin tubes, and left standing for 15 days in an open-air, where sunlight was exposed.

After standing for 15 days, the support was removed, and the shortest distance between the straight line connecting the both ends of the resin tube and the maximum curved portion of the resin tube was measured and the average value is shown in Table 2 below.

Curvature measurement result unit Example Comparative example One 2 3 One 2 Curvature Mm 20 14 15 24 21

As shown in Table 2, the amount of curvature was decreased in the order of Example 2 cooled by hot water during extrusion, Example 3 added hot air, and Example 1 cooled by water at room temperature, and chlorinated polyvinyl chloride was used. It can be seen that the amount of curvature increases in Comparative Example 1 that does not use and Comparative Example 2 that does not use metal soap.

This is because the residual stress is minimized by hot water treatment and hot air in Examples 2 and 3 due to the increase in resistance and elastic restoring force against deformation due to vertical load, and in the case of Comparative Example 1 It is judged that the degree of warpage of the resin tube is increased due to deterioration of the resin tube due to sunlight due to the lack of weather resistance and heat resistance.

From the above results, it can be seen that in order to prevent deformation due to external environment such as direct sunlight when the vinyl chloride resin tube is loaded on the road, it is important to remove the residual stress as well as the composition of the resin composition during the manufacture of the resin tube.

As described above, the resin tube according to the present invention improves weather resistance and prevents deformation due to the external environment without deteriorating physical properties such as impact strength, tensile strength, and flexural strength even during long-term loading in the open air, while storing for a long time after manufacture. Can be used.

Claims (7)

delete delete delete delete delete delete 100 parts by weight of polyvinyl chloride, 20 to 60 parts by weight of chlorinated polyvinyl chloride, 3 to 10 parts by weight of stabilizer, 1 to 5 parts by weight of processing aid, 0.1 to 3.0 parts by weight of metal soap, 0.1 to 3.0 parts by weight of lubricant, filler 1 to Mixing a resin composition comprising 5 parts by weight, 1-10 parts by weight of an impact modifier, and 0.01-2.00 parts by weight of an antimicrobial agent;
Incorporating pure water, the resin composition, the dispersant, and the water-soluble thickener into the jacketed reactor;
Removing oxygen in the reactor, filling with nitrogen, and then emulsifying by stirring;
Reacting by controlling a temperature with a jacket and adding a polymerization initiator to the reactor;
Removing unreacted substances in the reactants and dehydrating to obtain a vinyl chloride resin;
Manufacturing a resin pipe by extruding the vinyl chloride resin; And
And a step of heating the prepared resin tube with hot air at 40 to 60 ° C. for 50 to 100 seconds. The method of manufacturing a resin tube having improved weather resistance and tensile strength.