KR101754179B1 - shell powder filled polypropylene composite and manufacturing method the composite - Google Patents

shell powder filled polypropylene composite and manufacturing method the composite Download PDF

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KR101754179B1
KR101754179B1 KR1020150144168A KR20150144168A KR101754179B1 KR 101754179 B1 KR101754179 B1 KR 101754179B1 KR 1020150144168 A KR1020150144168 A KR 1020150144168A KR 20150144168 A KR20150144168 A KR 20150144168A KR 101754179 B1 KR101754179 B1 KR 101754179B1
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South Korea
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shell powder
pva
additive
weight
mixing
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KR1020150144168A
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Korean (ko)
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KR20170044807A (en
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송정일
샤아따울레만
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창원대학교 산학협력단
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/10—Homopolymers or copolymers of propene
    • C08L23/12—Polypropene

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Biological Depolymerization Polymers (AREA)

Abstract

The present invention relates to a shell powder having an average size of 10 to 600 μm and a shell powder comprising 95 to 99% of water and 1 to 5% of polyvinyl alcohol (PVA) to be mixed with the shell powder, And a polypropylene resin mixed with an additive made by mixing the shell powder and the PVA solution, and a method for producing the polypropylene composition, This makes it possible to improve the biodegradability, obtain excellent physical properties, and achieve flame retardancy.

Description

TECHNICAL FIELD The present invention relates to a polypropylene composition containing a shell powder and a method for producing the same,

The present invention relates to a polypropylene composition, and more particularly, to a polypropylene composition containing a shell powder according to a new form capable of achieving excellent physical properties while improving biodegradability and achieving flame retardancy, And a manufacturing method thereof.

In general, ploymer matrices have a light weight and excellent physical properties, and are thus widely used in automobiles and aircraft.

Particularly, the polypropylene resin in the polymer matrix is used as a synthetic polymer in various products.

However, such a polypropylene resin is disadvantageous in that the biodegradation is difficult and the cost for disposal is inevitably excessive, and air pollution due to various chemical components generated during such disposal is caused.

Accordingly, there has been an effort to mix bio-wastes, which can be biodegradable to polypropylene resin or other thermoplastic resin, and in recent years, efforts have been made to produce various synthetic materials using shells have. Regarding this, it is as disclosed in the registered patent 10-0291729, the registered patent 10-0386886, the registered patent 10-1154814, the registered patent 10-0600801 and the like.

That is, conventionally, the shell powder is added to various kinds of thermoplastic resins, thereby reducing manufacturing costs and biodegradation.

However, since the above-mentioned conventional techniques are produced by simply mixing the shell powder with other resin powders, the physical properties of the shell powder are greatly degraded, and the content of the shell powder can not be minimized.

In the case of the shell powder, since it is a substance which can not be melted, when the powder is simply mixed with the resin powder to form a synthetic polymer, the adhesive strength between the shell powder and the resin is low so that the shell powder substantially contains impurities .

Particularly, pure polypropylene has a disadvantage that it is very easy to burn and has a very low thermal stability, and therefore, there is a great risk due to influence of flame or high temperature.

Patent No. 10-0291729 Registration No. 10-0386886 Patent No. 10-1154814 Patent No. 10-0600801

SUMMARY OF THE INVENTION The present invention has been made in order to solve various problems of the prior art described above, and it is an object of the present invention to provide a novel shape capable of achieving excellent physical properties while improving biodegradability, And a method for producing the polypropylene composition.

In order to achieve the above object, the present invention provides a polypropylene composition comprising a shell powder having an average size of 10 to 600 탆 and a shell powder containing 95 to 99% by weight of the shell powder as an additive, Of water and 1 to 5% by weight of polyvinyl alcohol (PVA) and a polypropylene resin mixed with an additive made by mixing the shell powder and the PVA solution .

In order to accomplish the above object, the present invention provides a method for preparing a polypropylene composition containing shell powder, comprising the steps of: preparing a shell powder and a PVA solution; An additive preparation step of mixing the prepared shell powder with the PVA solution to prepare an additive; Preparing a mixture by mixing the prepared additives with a polypropylene resin and mixing them with each other; Pellet forming step of cutting the prepared mixture at a temperature range of 210 to 220 캜 and then cutting the pellet into pellets; And drying the molded pellets.

The PVA solution in the preparing step is prepared by mixing 95 to 99% by weight of water and 1 to 5% by weight of polyvinyl alcohol (PVA) ) Were mixed, and then the mixture was stirred for 24 hours while maintaining the temperature at 80 ° C.

In addition, the PVA solution may be prepared by mixing the shell powder repeatedly in units of drops in the additive manufacturing step.

In addition, in the preparation of the mixture, the polypropylene resin is provided in an amount of 80 to 90 wt%, the additive is provided in 10 to 20 wt%, and the PVA solution in the additive is 0.5 to 1.5 wt% do.

As described above, the polypropylene composition containing the shell powder of the present invention has the effect of achieving biodegradability as well as achieving flame retardancy by producing the shell powder by adding the shell powder to the polypropylene resin as an additive.

Particularly, the present invention is effective in preventing the occurrence of crevices in mixing with the polypropylene resin by coating PVA on the surface of the shell powder, and thereby improving the physical properties in spite of addition of the shell powder I have.

Brief Description of the Drawings Fig. 1 is a schematic view for explaining the structure of a polypropylene composition made of a PVA-uncoated shell powder as an additive
Fig. 2 is a schematic view for explaining the structure of a polypropylene composition made from PVA-coated shell powder of the present invention as an additive
Fig. 3 is a flowchart showing a process for producing a polypropylene composition containing the shell powder of the present invention
FIG. 4 is a graph showing the results of experiments on the tensile strength and tensile elastic modulus of the polypropylene composition containing the shell powder of the present invention
5 is a state diagram showing photographs of particles not mixed with the PVA solution in the shell powder
6 is a state diagram showing photographs of particles mixed with a PVA solution in a shell powder
7 and 8 are graphs showing experimental results on the ignition time and the combustion rate for the polypropylene composition containing the shell powder of the present invention
9 is a state diagram for explaining the particle state of OSP / PP1, which is a polypropylene composition without PVA applied
Fig. 10 shows a state diagram for explaining the particle state for OSP / PP3, which is a polypropylene composition applied with 1.0 part by weight of PVA
11 is a graph showing the results of thermal analysis of the polypropylene composition by the addition amount of each PVA
12 to 15 are graphs showing the results of the tensile test of the polypropylene composition for each addition amount of the respective PVA

Hereinafter, embodiments of a polypropylene composition containing a shell powder of the present invention and a method for producing the same will be described with reference to FIGS. 1 to 15.

First, the polypropylene composition containing the shell powder of the present invention comprises an additive made of an oyster shell power (OSP) 100 and a polyvinyl alcohol solution (hereinafter referred to as " PVA solution "), And a polypropylene resin (PP).

That is, when the polypropylene composition is produced simply by mixing the shell powder 100 with the polypropylene resin powder, the shell powder 100 has a low adhesive force with the polypropylene resin 200, (201) is formed, as shown in Fig. 1 attached hereto.

In the present invention, by coating a polyvinyl alcohol (hereinafter referred to as "PVA") 300 on each particle surface of the shell powder 100 as shown in FIG. 2, the PVA 300 Thereby improving the biodegradability due to the addition of the shell powder 100. In addition to this, it is possible to improve the biodegradability of the shell powder 100 by addition of the shell powder 100, So that excellent physical properties can be obtained as compared with a conventional technique.

Particularly, in the embodiment of the present invention, the shell powder 100 is a powder made of oyster shell.

In other words, oyster shells can be easily cultivated because they can be cultured. Bio-wastes can improve biodegradability and contain 96% calcium carbonate (CaCO 3 ) It is possible to obtain a flame-retardant polypropylene resin composition having excellent biodegradability by using it as an additive (filler).

In addition, if the shell powder 100 has an average size of 10 to 600 μm, if the shell powder 100 has a size of less than 10 μm, it is difficult to manufacture the shell powder 100, ) May not be smoothly coated. If the size of the shell powder 100 is more than 600 mu m, there is a concern that a desired tensile strength can not be obtained because the particles are thick. In the embodiment of the present invention, the average size of the shell powder 100 is 148 탆. The particle size of the shell powder 100 is determined by the ease of manufacture, smooth coating and tensioning of the PVA 300, It is a size considering all the strength.

The PVA solution is prepared by mixing 95 to 99% by weight of water with 1 to 5% by weight of PVA (300).

The mixing ratio of the water and the PVA 300 is such that the PVA solution obtained through the water and the PVA 300 can be smoothly coated on the shell powder 100, and a desired tensile strength can be obtained.

Hereinafter, the manufacturing method of the polypropylene composition including the shell powder of the present invention will be described in detail with reference to the flowchart of FIG.

First, preparation steps (S100) for preparing the shell powder 100 and the PVA solution, respectively, are carried out to prepare the polypropylene composition of the present invention.

In this case, the shell powder 100 has an average size of 10 to 600 μm. The PVA solution is prepared by mixing 95 to 99% by weight of water and 1 to 5% by weight of PVA (300) While maintaining the temperature at 80 占 폚.

Next, an additive preparation step S200 is performed by mixing the PVA solution with the shell powder 100 prepared as described above.

At this time, the mixing of the PVA solution into the shell powder 100 is performed by repeatedly supplying the PVA solution to the shell powder 100 in units of droplets and continuously mixing.

That is, rather than pouring the PVA solution into the shell powder 100 and then mixing the shell powder with each other, the PVA solution is repeatedly provided in units of droplets during the continuous repetitive mixing of the shell powder 100, So that the PVA 300 can be precisely coated on each particle surface of the substrate 100.

Particularly, it is preferable that the PVA solution is provided in a range of 0.5 to 1.5 parts by weight with respect to the shell powder 100. This is because when the PVA solution is provided at less than 0.5 part by weight with respect to the shell powder 100, When the PVA solution is provided in an amount exceeding 1.5 parts by weight with respect to the shell powder 100, the PVA 300 may not be sufficiently coated with the shell powder 100, Because the surface of each particle of the shell powder 100 is excessively coated to lower the tensile strength and the tensile elastic modulus. This is shown in the graph of FIG. 4 attached hereto.

5 is a photograph of particles showing a state in which the PVA solution is not mixed with the shell powder 100, and the state diagram of FIG. 6 is a state in which the PVA solution is mixed with the shell powder 100 ≪ / RTI >

That is, as shown in each of these state diagrams, the PVA solution is mixed with the shell powder 100 to form a state in which the PVA 300 is coated on the surface of each shell powder 100.

Next, a mixture preparation step (S300) of mixing the prepared additives with the polypropylene resin (200) and mixing them together is carried out.

In the preparation of the mixture (S300), the polypropylene resin (200) is provided in an amount of 80 to 90% by weight and the additive is provided in an amount of 10 to 20% by weight.

That is, by providing the polypropylene resin 200 and the additive at a ratio of approximately 9: 1 to 8: 2, the polypropylene resin 200 has inherent characteristics (light weight, excellent strength, (Excellent in biodegradability and flame retardancy) of the shell powder 100 made of the oyster shell in the additive can be obtained at the same time. If the content of the additive is further increased, the strength of the polypropylene composition is lowered, which is not preferable.

Next, the pellet molding step (S400) is performed in which the prepared mixture is cut out at a temperature range of 210 to 220 캜 and then cut into pellets.

That is, the mixture can be pulled out in a wire form in a high-temperature environment so that the moisture contained in the mixture can be completely evaporated, and then the pellet is extruded in the form of wire to form a mixture into various types So that it can be used.

Next, a drying step (S500) of drying the molded pellets is performed.

That is, the moisture remaining in the pellet is completely removed through the drying step (S500).

As a result, the polypropylene composition in the form of a pellet according to an embodiment of the present invention is completed through the above-described processes.

Meanwhile, FIGS. 7 and 8 show experimental results on the ignition time and the combustion rate for the finished polypropylene composition of the present invention, respectively.

At this time, a comparison was made according to the content of the PVA 300 with respect to the shell powder 100 constituting the additive. At this time, the PVA 300 was applied with the additive in a state in which the shell powder 100 was not provided at all Wherein the polypropylene composition is OSP / PP1 and the polypropylene composition to which the additive is applied in a state in which the PVA is provided in 0.5 parts by weight with respect to the shell powder (100) is OSP / PP2, and the PVA (300) PPP is a polypropylene composition to which an additive in an amount of 1.0 part by weight based on 100 parts by weight of the polypropylene composition is OSP / PP3 and 1.5 parts by weight of the PVA (300) to be.

That is, as apparent from these experiments, when the PVA 300 is OSP / PP3, which is a polypropylene composition to which an additive is applied in an amount of 1.0 part by weight based on the shell powder 100, the ignition time is longest, It can be seen that the burning time is long and the burning rate is low compared to the case where the PVA 300 is added even when the PVA 300 is not added.

9 and 10 show that the particle state for OSP / PP1, which is a polypropylene composition without PVA 300, and the particle state for OSP / PP3, which is a polypropylene composition applied with 1.0 part by weight of PVA 300 And shows the state of the particles.

That is, the photographs of these particle states show that the particles of the polypropylene composition to which the PVA is applied are more dense as in the present invention, and the particles of the polypropylene composition when only the shell powder is applied without applying the PVA, gap is generated.

9 and 10 show that the particle state for OSP / PP1, which is a polypropylene composition without PVA 300, and the particle state for OSP / PP3, which is a polypropylene composition applied with 1.0 part by weight of PVA 300 And shows the state of the particles.

In addition, the graph of Fig. 11 shows the result of thermal analysis of the polypropylene composition by the addition amount of each PVA described above.

As can be seen from the above, when the polypropylene composition is OSP / PP3 in which PVA is added to 1.0 part by weight of the shell powder in a state of about 300 ° C, which is a normal fire temperature, , And it can be seen that the most weight reduction is achieved in the case of OSP / PP1 which is a polypropylene composition without PVA. In other words, PVA applied state is not soluble in high temperature condition compared to not applied state.

Further, the graphs of FIGS. 12 to 15 attached show the results of the tensile test of the polypropylene composition by the addition amount of each PVA described above.

As can be seen, the yield point of the material is superior to that of the PVA applied state.

As a result, the polypropylene composition containing the shell powder of the present invention can be biodegradable as well as flame retardant by being produced by adding a shell powder to a polypropylene resin as an additive.

Particularly, in the present invention, by coating PVA on the surface of the shell powder, it is possible to prevent crevices from being formed when mixing with the polypropylene resin, and to improve the physical properties even though the shell powder is added.

100. Shell powder 200. Polypropylene resin
201. Clearance 300. Polyvinyl alcohol

Claims (5)

A shell powder having an average size of 10 to 600 μm and 95 to 99% by weight of water and 1 to 5% by weight of polyvinyl alcohol (PVA) to make the shell powder as an additive while being mixed with the shell powder, And a polypropylene resin mixed with an additive made by mixing the shell powder and the PVA solution. 2. The polypropylene composition according to claim 1, wherein the polypropylene resin is a polypropylene resin. Preparing a shell powder and a PVA solution, respectively;
An additive preparation step of mixing the prepared shell powder with the PVA solution to prepare an additive;
Preparing a mixture by mixing the prepared additives with a polypropylene resin and mixing them with each other;
Pellet forming step of cutting the prepared mixture at a temperature range of 210 to 220 캜 and then cutting the pellet into pellets;
And drying the molded pellets. The method of manufacturing a polypropylene composition according to claim 1, 3. The method of claim 2,
The shell powder in the preparing step has an average size of 10 to 600 탆,
The PVA solution in the preparation step is prepared by mixing 95 to 99% by weight of water and 1 to 5% by weight of polyvinyl alcohol (PVA) and stirring for 24 hours while maintaining the temperature at 80 ° C. Wherein the polypropylene composition comprises a shell powder. 3. The method of claim 2,
Wherein the PVA solution is prepared by mixing the shell powder repeatedly in units of droplets in the additive preparation step. 3. The method of claim 2,
In the preparation of the mixture
The polypropylene resin is provided in an amount of 80 to 95% by weight, the additive is provided in an amount of 5 to 20% by weight,
Wherein the PVA solution in the additive is 0.5 to 1.5 parts by weight relative to the shell powder.
KR1020150144168A 2015-10-15 2015-10-15 shell powder filled polypropylene composite and manufacturing method the composite KR101754179B1 (en)

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KR101754179B1 true KR101754179B1 (en) 2017-07-06

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100291729B1 (en) 1998-08-20 2001-11-22 윤윤식 Synthetic resin composition containing shell powder

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100291729B1 (en) 1998-08-20 2001-11-22 윤윤식 Synthetic resin composition containing shell powder

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