KR20170037733A - Soundinsulation materials using recycled PVC from waste plastic and manufactuing method thereof - Google Patents

Abstract

The present invention relates to an acoustic foam used in various industries, particularly, an acoustic foam using polyvinyl chloride (PVC) extracted from plastic wastes, and more specifically, to an acoustic foam which uses recycled PVC from plastic wastes and has excellent sound-blocking properties and heat-insulating properties, and a method of producing the same. According to the present invention, the method of producing an acoustic foam using recycled PVC from plastic wastes comprises the steps of: washing selected plastic wastes and crushing the same into particles of selected sizes; along with a pressurized air, passing mixed particles of the crushed plastic wastes through a pipe charging device (104) made of charging materials to charge the mixed particles; passing the mixed particles of crushed plastic wastes containing negatively-charged PVC particles between a negatively-charged negative electrode plate (105) and a positively-charged positive electrode plate (106) to collect the PVC particles onto the positive electrode plate (106); mixing 100-150 parts by weight of the collected PVC particles, 40-60 parts by weight of barium sulfate (BaSO_4), 5-40 parts by weight of expanded vermiculite, 5-40 parts by weight of expanded perlite, 2-10 parts by weight of Mg-Stearate, 5-15 parts by weight of butyl stearate, 30-60 parts by weight of DOP, and 3-10 parts by weight of epoxidized soybean oil; and molding the acoustic foam produced in the previous step into a sheet or a selected shape.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound insulation material recycled from polyvinyl chloride of a waste plastic and a manufacturing method thereof,

The present invention relates to a sound insulating material used in various industrial fields. More particularly, the present invention relates to a sound insulating material using polyvinyl chloride (PVC) extracted from waste plastic, and more particularly to a sound insulating material which recycles polyvinyl chloride And a manufacturing method thereof.

The sound insulating material is widely used in various industrial fields as a material for preventing external noise or internal noise from flowing out.

Generally, the sound insulating material is constituted to mix the base resin and various additives and to block the noise by coating, applying and attaching to the parts requiring sound insulation. Various synthetic resins are used as a base resin, and polyvinyl chloride (PVC) is widely used as a typical base resin.

Polyvinyl chloride is widely used as a base resin for a sound insulating material since it is easy to mold, has excellent strength, and has excellent mechanical properties.

Along with the above polyvinyl chloride, various synthetic resins such as PE and PP are used as various excellent materials for replacing wood, metal and other materials throughout life and industry.

However, these waste plastics were generally buried or incinerated with other wastes. However, in the case of waste plastics, due to some components and a large amount of additives, the incineration or landfill is damaging the treatment facilities or discharging dioxin and toxic gas, which is a macro cause of environmental pollution.

Recently, various methods for recycling waste plastics have been sought for economic and environmental problems.

The biggest problem in recycling such waste plastic is polyvinyl chloride (PVC). Polyvinyl chloride makes it difficult to recycle plastics in all areas, such as RPF, incineration, emulsification, and material regeneration, as well as environmental problems.

In terms of environment, toxic gas and dioxin are generated when incinerating organic matter containing mainly chlorine (chlorine) as an organic chloride. Polyvinyl chloride is composed of chlorine in 57% of the weight of polyvinyl chloride, which is the largest source of dioxins in plastic materials.

Polyvinyl chloride is a thermoplastic resin. However, due to the large amount of additives, pyrolysis occurs severely or a new compound is produced. Therefore, in case of waste plastics containing polychlorinated biphenyls, CO-PP, GPPS, HDPE and LDPE And the value as a product or a raw material is lost even if it is regenerated.

Document 1: Korean Patent Application Publication No. 10-2001-16543, " Document 2: Utility Model Registration No. 20-0166900, "Suction / sound insulating material" Literature 3. KIPO No. 10-216424, "Sound Insulation Composition"

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made in an effort to solve the above-mentioned problems, and an object of the present invention is to provide a sound insulation material which can effectively separate polyvinyl chloride (PCV) from waste plastic, recycle separated polyvinyl chloride It is an object of the present invention to provide a method.

According to another aspect of the present invention, there is provided a method of manufacturing a sound insulating material by recycling polyvinyl chloride of a waste plastic according to the present invention, comprising the steps of: washing selected waste plastic and crushing the waste plastic to a predetermined size; Charging the pulverized waste plastic mixed particles with compressed air through a pipe discharger 104 made of a charged material; (+) Polarity positive electrode plate 106 by passing the waste plastic mixed particles containing polyolefin resin particles charged with (-) polarity between the negative polar plate 105 and the positive polar plate 106, ; 100 to 150 parts by weight of the collected polyvinyl chloride, 40 to 60 parts by weight of barium sulfate (BaSO ₄ ), 5 to 40 parts by weight of expanded vermiculite, 5 to 40 parts by weight of expanded perlite, 2 to 10 parts by weight of Mg- 5 to 15 parts by weight of butyl stearate, 30 to 60 parts by weight of DOP and 3 to 10 parts by weight of epoxidized soybean oil; And molding the sound insulating material mixed as described above into a sheet or a predetermined shape.

At this time, 40 to 50 parts by weight of oxidant is further mixed in the mixing step.

Further, in the mixing step, 50 to 80 parts by weight of glass barbonize chips are further mixed.

Also, 15 to 30 parts by weight of mica is further mixed in the mixing step.

Further, in the mixing step, 5 to 12 parts by weight of ethylene vinyl acetate-vinyl chloride is further mixed.

The sound insulating material recycled from the polyvinyl chloride of the waste plastic according to the present invention is composed of 100-150 parts by weight of polyvinyl chloride extracted from the waste plastic, 40-60 parts by weight of barium sulfate (BaSO ₄ ), 5-80 parts by weight of expanded vermiculite, 40 to 40 parts by weight of expanded perlite, 2 to 10 parts by weight of Mg-stearate, 5 to 15 parts by weight of butyl stearate, 30 to 60 parts by weight of DOP and 3 to 10 parts by weight of epoxidized soybean oil.

In this case, 40 to 50 parts by weight of oxidant is further mixed in the sound insulating material.

Further, 50 to 80 parts by weight of glass barbonize chips are further mixed with the sound insulating material.

Also, 15 to 30 parts by weight of mica is further mixed with the sound insulating material.

Further, the sound insulating material is further mixed with 5 to 12 parts by weight of ethylene vinyl acetate-vinyl chloride.

The sound insulating material recycled with polyvinyl chloride according to the present invention thus constructed effectively extracts polyvinyl chloride from waste plastics mixed with various synthetic resins and uses the extracted polyvinyl chloride to produce a sound insulating material excellent in sound insulation and heat insulation .

Further, by extracting and separating polyvinyl chloride, which is a factor that makes it difficult to recycle the waste plastic, it is possible to easily recycle various synthetic resins from waste plastic from which polyvinyl chloride is extracted.

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

Hereinafter, a sound insulating material recycled from polyvinyl chloride of waste plastics according to the present invention and a method for producing the same will be described in detail.

First, waste plastics recovered for recycling are washed and waste plastic containing polyvinyl chloride (PVC) is crushed to prepare mixed particles in which PVC particles and other synthetic resin particles are mixed.

The mixed particles produced by crushing the waste plastic are supplied to the injection port 103 of the sorter 100 shown in FIG. 1 and the compressed air generated in the air compressor 101 is supplied to the air compressor 101 The waste plastic mixed particles supplied to the injection port 103 are blown to the pipe charge 104. [

The waste plastic mixed particles supplied to the injection port 103 moves to the pipe charge 104 together with compressed air.

The waste plastic mixed particles that have moved to the pipe charge 104 flow by air in the pipe charge 104 and collide with or collide with the inner wall of the pipe charge 104 made of the charged material so that the polyvinyl chloride particles -) polarity is charged and the other plastic particles are charged with (+) polarity.

As described above, the waste plastic mixed particles charged with (-) polarity or (+) polarity through the pipe charge 104 is supplied to the fractionation tank 108 and drops inside the fractionation tank 108.

(-) polarity anode plate 105 and a (+) polarity anode plate 106 are provided symmetrically on both sides of the path where the waste plastic mixed particles fall down.

Therefore, the polyvinyl chloride particles charged with (-) polarity from the waste plastic mixed particles falling inside the separation tank 108 move to the positive electrode plate 106 and other waste plastic particles charged with positive polarity move to the negative electrode plate 105).

The polyvinyl chloride particles falling and moving to the positive electrode plate 106 and the other waste plastic particles falling and moving to the negative electrode plate 105 are separated and fall by the positive electrode plate 106 and the negative electrode plate 105, The waste plastic particles other than the polyvinyl chloride particles are collected and collected.

At this time, the pipe charge 104 is formed into a spiral shape as shown in FIG. 1, so that the waste plastic mixed particles are charged with sufficient friction and collision while passing through the long-path pipe charge 104 formed of a charge material .

It is preferable that the air dryer 102 is installed between the air compressor 101 and the injection port 103 to remove moisture contained in the compressed air supplied from the air compressor 101.

This is because the presence of moisture in the compressed air adversely affects the charging and sorting efficiency of the waste plastic mixed particles.

The polyvinyl chloride particles collected in the collector 107 are collected in order to produce the sound insulating material using the polyvinyl chloride particles selected through the separator 100 as described above.

40 to 60 parts by weight of barium sulfate (BaSO ₄ ) is added to 100 to 150 parts by weight of polyvinyl chloride resin (PVC) obtained by melting polyvinyl chloride particles classified and collected from the waste plastics in the same manner, 5 to 40 parts by weight of expandable Vermiculite, 5 to 40 parts by weight of expanded stone, 2 to 10 parts by weight of Mg-St (Magnesium Stearate) as stabilizer, 5 to 15 parts by weight of butyl stearate as a lubricant, 30 to 60 parts by weight of DOP and 3 to 10 parts by weight of epoxidized soybean oil (EOS) are mixed to constitute the sound insulating material of the present invention.

40 to 60 parts by weight of barium sulfate (BaSO ₄ ) are mixed with 100 to 150 parts by weight of the polyvinyl chloride resin.

Barium sulfate (BaSO ₄ ) is used to impart a certain level of flame retardancy to a sound insulating material, and 40 to 60 parts by weight of barium sulfate is mixed with 100 to 150 parts by weight of a polyvinyl chloride resin. If the barium sulfate is less than 40 parts by weight, the flame retardancy is lowered. If it exceeds 60 parts by weight, the softness of the sound insulating material is deteriorated and the possibility of the structure being broken is high, so 40 to 60 parts by weight of barium sulfate is mixed.

Then, 5 to 40 parts by weight of expanded vermiculite is mixed with 100 to 150 parts by weight of the polyvinyl chloride resin.

Vermiculite is a unique mineral containing water, which is the only water mica that is the alteration product of phlogopite and biotite.

When it is heated with a sudden high heat, the water in the layer of vermiculite is vaporized by steam and pressure is generated, and as the pressure is released, the vermiculite expands and becomes the expanding vermiculite.

Expanded vermiculite, which is exfoliated by heat, has excellent bonding strength with resin, very low specific gravity, excellent heat insulating property and nonflammability, noise shielding effect, moisture absorbing effect and physical shock absorbing effect.

5 to 40 parts by weight of the above-described expanded vermiculite is mixed. When the mixture is mixed in an amount of less than 5 parts by weight, it is impossible to expect heat insulation, incombustibility and sound insulation performance by the expanded vermiculite. , And natural surface finish becomes difficult, it is preferable to mix 5 to 40 parts by weight of expanded vermiculite.

Then, 5 to 40 parts by weight of expanded pearlite is mixed with 100 to 150 parts by weight of the polyvinyl chloride resin.

Expansion Perlite is a natural inorganic material made by plastic expansion and expansion at a temperature of 1,000 ~ 1,300. It is excellent in bonding with resin due to numerous pores generated by plastic expansion processing, It is excellent.

When the amount of the expanded peroxide is less than 5 parts by weight, the thermal insulation and sound insulation of the expanded peroxide can not be expected. When the amount of the expanded peroxide is more than 40 parts by weight, the natural surface finish of the sound insulating material becomes difficult. Is preferably mixed with 5 to 40 parts by weight.

And 2 to 10 parts by weight of Mg-Stearate (Magnesium stearate).

In the process of polyvinyl chloride, HCl is inevitably generated, and the Mg-stearate is mixed to remove HCl generated when polyvinyl chloride is processed. Since the HCl generated in the processing of polyvinyl chloride promotes the decomposition of polyvinyl chloride, the stability of the polyvinyl chloride resin depends on how much HCl is removed.

2 to 10 parts by weight of Mg-stearate is mixed. If the mixing range is out of the range, product stiffness, weather resistance, activity and flow balance are adversely affected. Therefore, it is preferable to mix 2 to 10 parts by weight of Mg-stearate.

And 5 to 15 parts by weight of butyl stearate as a lubricant are mixed with 100 to 150 parts by weight of polyvinyl chloride. Butyl stearate has an advantage of being excellent in compatibility and internal activity. The butyl stearate is mixed in an amount of 5 to 15 parts by weight, and if it is out of this range, the product price, fluidity, weather resistance and impact resistance are affected.

And 30 to 60 parts by weight of dioctyl phthalate (DOP) as a plasticizer are mixed and 3 to 10 parts by weight of epoxidized soybean oil (EOS) are mixed.

By mixing the epoxidized soybean oil, adhesion of surface contaminants and scratching of the sound insulating material are prevented.

40 to 60 parts by weight of barium sulfate (BaSO ₄ ) and 40 to 60 parts by weight of expanded vermiculite (PVC) are added to 100 to 150 parts by weight of polyvinyl chloride resin (PVC) obtained by melting polyvinyl chloride particles classified and collected from waste plastics, 5 to 40 parts by weight of expandable Vermiculite, 5 to 40 parts by weight of expanded stone, 2 to 10 parts by weight of Mg-St (Magnesium Stearate) as stabilizer, 5 to 15 parts by weight of butyl stearate as a lubricant, 30 to 60 parts by weight and epoxidized soybean oil (EOS) 3 to 10 parts by weight are mixed to constitute the sound insulating material of the present invention.

In order to increase the tensile strength of the sound insulating material, 40 to 50 parts by weight of oxidant may be further mixed to form a sound insulating material. To increase the sound insulating performance, 50 to 80 parts by weight of a glass carbon chip is further mixed can do.

And 15 to 30 parts by weight of mica are further mixed.

The mica ensures the dispersibility of the PVC resin to be constant, which smoothes the flow of the resin during the molding of the product, thereby improving dimensional stability and productivity. According to the content of the mica, the strength of the sound insulation effect, the impact strength and the tensile strength can be increased, so that the deformation and breakage of the finished sound insulating material against the external impact can be prevented.

Particularly, when the sound insulating material is applied to the outer surface of the upper and the sewer pipe, the sound insulating material is increased in the bonding property to the pipe, and the interface is peeled off to prevent the car sound from being deteriorated. It is preferable that such a mica is mixed with 15 to 40 parts by weight in consideration of product molding and unit cost of raw materials.

And 5 to 12 parts by weight of ethylene vinyl acetate-vinyl chloride (EVA-VC) as an impact modifier.

The sound insulating material according to the present invention configured as described above is formed in the form of a sheet to be attached to a place where sound insulation is required or is formed on the outer surface of a pipe or a connecting pipe when a pipe or a connecting pipe is manufactured.

<Examples>

100 parts by weight of polyvinyl chloride (PVC), 50 parts by weight of barium sulfate, 40 parts by weight of oxidant, 60 parts by weight of glass carbonized chips, 20 parts by weight of mica, 20 parts by weight of expanded vermiculite, 20 parts by weight of expanded peroxide, 7 parts by weight of Mg-stearate, 10 parts by weight of butyl stearate, 30 parts by weight of DOP and 5 parts by weight of epoxidized soybean oil were mixed to form a sound insulating material in a sheet form.

Then, the surface of the product was smoothly polished and calendered on a calendar, and a sound insulating sheet was manufactured through a cooling process so as to minimize deformation of expansion and contraction of the product.

Noise comparison test
Test Items

Test result Steel plate 3mm Steel plate 3 mm + inventive soundproof sheet 2 mm frequency
(Hz) Sound pressure level
(dB) frequency
(Hz) Sound pressure level
(dB) frequency
(Hz) Sound pressure level
(dB) frequency
(Hz) Sound pressure level
(dB)


Sound pressure

level

Research

50 60.6 630 66.6 50 51.7 630 60.1 63 58.0 800 65.0 63 50.7 800 58.8 80 57.7 1,000 60.8 80 51.0 1000 54.3 100 67.7 1250 56.1 100 52.7 1250 51.1 125 65.1 1600 57.0 125 62.0 1600 52.0 160 74.7 2000 57.8 160 70.4 2000 49.7 200 77.2 2500 55.2 200 71.7 2500 48.2 250 64.4 3150 52.1 250 62.5 3150 41.5 315 66.5 4000 59.9 315 61.9 4000 41.3 400 67.3 5000 51.8 400 62.8 5000 38.0 500 66.0 - - 500 61.9 - -

- Test method: According to KS A ISO 3744: 2002 (Measurement method of source power level of noise source by acousto-sound pressure method - Practical measurement method on reflection surface rough free sound field), sound source is put in two rectangular structures and one Noise was measured in a state in which a sheet molded from the sound insulating material of the present invention was attached to the structure and no soundproof sheet was attached to the other structure.

As shown in Table 1, it can be seen that there is a large difference in the external noises when the seat formed of the sound insulating material of the present invention is attached and when the seat is not attached.

A comparison of known sound insulation performance between a conventional soundproofing material based on polyvinyl chloride and the sound insulating material of the present invention is as follows.

<Comparative Example>

100 parts by weight of polyvinyl chloride (PVC), 30 parts by weight of DOP, 7 parts by weight of Mg-stearate, 80 parts by weight of barium sulfate and 10 parts by weight of EVC-VC were mixed to form a sound insulating material. After smoothly polished and polished, a sound insulating sheet was manufactured through a cooling process so as to minimize deformation of expansion and contraction of the product.

Noise comparison test
Test Items

Test result Steel plate 3mm + Comparative example Soundproof sheet 2mm Steel plate 3 mm + inventive soundproof sheet 2 mm frequency
(Hz) Sound pressure level
(dB) frequency
(Hz) Sound pressure level
(dB) frequency
(Hz) Sound pressure level
(dB) frequency
(Hz) Sound pressure level
(dB)


Sound pressure

level

Research

50 55.8 630 63.6 50 51.7 630 60.1 63 54.2 800 62.1 63 50.7 800 58.8 80 54.9 1000 58.7 80 51.0 1000 54.3 100 61.1 1250 54.2 100 52.7 1250 51.1 125 64.2 1600 54.9 125 62.0 1600 52.0 160 72.3 2000 53.5 160 70.4 2000 49.7 200 75.0 2500 52.0 200 71.7 2500 48.2 250 63.1 3150 48.3 250 62.5 3150 41.5 315 64.5 4000 50.4 315 61.9 4000 41.3 400 64.7 5000 45.8 400 62.8 5000 38.0 500 64.2 - - 500 61.9 - -

- Test method: According to KS A ISO 3744: 2002 (Measurement method of source power level of noise source by acousto-sound pressure method - Practical measurement method on reflection surface rough free sound field), sound source is put in two rectangular structures and one The exterior noise was measured in a state in which a sheet formed of the sound insulating material of the present invention was attached to the structure and a known soundproof sheet was attached to the other structure.

As shown in Table 2, when the seat made of the sound insulating material of the present invention was attached and the known sound insulating sheet was attached, the sound insulating performance of the sound insulating material of the present invention was found to be superior to that of a known sound insulating material have. The main reason for such difference in sound insulation performance is that the porous expanded ceramics mixed with the expanded perlite improve the sound insulation.

The sound insulating material recycled with polyvinyl chloride according to the present invention thus constructed effectively extracts polyvinyl chloride from waste plastics mixed with various synthetic resins and uses the extracted polyvinyl chloride to produce a sound insulating material excellent in sound insulation and heat insulation .

The sound insulating material recycled from the polyvinyl chloride of the waste plastic according to the present invention and the method for producing the same were described above.

It will be understood by those skilled in the art that the technical features of the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.

Therefore, it should be understood that the above-described embodiments are to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than the foregoing description, Ranges and equivalents thereof are to be construed as being included within the scope of the present invention.

100: selector
101: air compressor
102: air dryer
103: inlet
104: Pipelayer electric
105: cathode plate
106: positive electrode plate
107: Collector
108: Classification tank

Claims (10)

Washing the selected waste plastic and crushing it to a predetermined size of particle size;
Charging the pulverized waste plastic mixed particles with compressed air through a pipe discharger 104 made of a charged material;
(+) Polarity positive electrode plate 106 by passing the waste plastic mixed particles containing polyolefin resin particles charged with (-) polarity between the negative polar plate 105 and the positive polar plate 106, ;
100 to 150 parts by weight of the collected polyvinyl chloride, 40 to 60 parts by weight of barium sulfate (BaSO ₄ ), 5 to 40 parts by weight of expanded vermiculite, 5 to 40 parts by weight of expanded perlite, 2 to 10 parts by weight of Mg- 5 to 15 parts by weight of butyl stearate, 30 to 60 parts by weight of DOP and 3 to 10 parts by weight of epoxidized soybean oil;
And molding the sound insulating material mixed as described above into a sheet or a predetermined shape. The method of manufacturing a sound insulating material recycled with polyvinyl chloride of waste plastic.
The method according to claim 1,
And 40 to 50 parts by weight of an oxidant is further mixed in the mixing step.
The method according to claim 1,
And 50 to 80 parts by weight of glass barbonize chips are further mixed in the mixing step.
The method according to claim 1,
And 15 to 30 parts by weight of mica is further mixed in the mixing step. The method for manufacturing a sound insulating material recycled with polyvinyl chloride of waste plastic.
The method according to claim 1,
And 5 to 12 parts by weight of ethylene vinyl acetate-vinyl chloride is further mixed in the mixing step.
100 to 150 parts by weight of polyvinyl chloride extracted from waste plastic, 40 to 60 parts by weight of barium sulphate (BaSO ₄ ), 5 to 40 parts by weight of expanded vermiculite, 5 to 40 parts by weight of expanded perlite, Mg-Stearate 2 To 10 parts by weight of butyl stearate, 5 to 15 parts by weight of butyl stearate, 30 to 60 parts by weight of DOP and 3 to 10 parts by weight of epoxidized soybean oil.
The method according to claim 6,
And 40 to 50 parts by weight of an oxidant is further mixed in the sound insulating material.
The method according to claim 6,
And 50 to 80 parts by weight of glass barbonize chips are further mixed in the sound insulating material.
The method according to claim 6,
And 15 to 30 parts by weight of mica is further mixed in the sound insulating material.
The method according to claim 6,
Wherein the sound insulating material is further mixed with 5 to 12 parts by weight of ethylene vinyl acetate-vinyl chloride, and recycled polyvinyl chloride of the waste plastic.

Images