KR20190062907A - Polypropylene resin composition having improved impact strength and improved processing window and the molded article - Google Patents

Abstract

Disclosed are: a polypropylene resin composition for plastic corrugated cardboard, which is suitable for plastic corrugated cardboard, has high low-temperature impact characteristics while maintaining flexural modulus, and is excellent in formability even in forming plastic corrugated cardboard of a long width; and plastic corrugated cardboard manufactured from the same. The present invention provides the polypropylene resin composition for plastic corrugated cardboard comprises 0.05 to 1 parts by weight of a nucleating agent and 0.01 to 10 parts by weight of a processing material comprising a fluorine-based polymer, based on 100 parts by weight of a mixture composed of 90 to 99 wt% of an impact block copolymer and 1 to 10 wt% of a high density polyethylene.

Description

TECHNICAL FIELD [0001] The present invention relates to a polypropylene resin composition for plastic corrugated cardboard having improved impact resistance and workability, and a molded article thereof. BACKGROUND ART [0002]

The present invention relates to a polypropylene resin composition for plastic corrugated cardboard, and more particularly to a polypropylene resin composition for plastic corrugated cardboard having improved impact resistance and processability.

In general, paper or plastic boxes are used for packing or storing goods. Particularly, a sheet of hollow structure formed of plastic is called a plastic corrugated cardboard, and a box made of this plastic corrugated cardboard is called a short plastic box and is widely used for industrial purposes.

The plastic corrugated cardboard has a structure as shown in Fig. 1, which is superior in bending rigidity to a general single-layer sheet and can be lightweight at the same strength. Also, it has higher rigidity and durability than cardboard, which is a paper material, and is resistant to moisture and is mainly used in a multi-purpose box. Plastic corrugated board is mainly made of polypropylene, and it is applied more than other materials due to the characteristics of low specific gravity and high rigidity, which are advantages of polypropylene.

Such plastic corrugated cardboard has a great deal of usability in normal atmospheric conditions but its use has been limited due to low impact strength in cold regions where the air is falling below freezing or in freezing warehouses in winter. In addition, due to the development of molding machines, the width of the plastic corrugated cardboard forming machine is becoming wider, and when the reforming agent is added for a special purpose, the plasticity of the corrugated cardboard is lowered due to the hollow structure of the corrugated cardboard. have.

Korean Patent No. 1494528 discloses a polypropylene composition containing high-density polyethylene in an impact block copolymer in order to improve the low-temperature impact strength of polypropylene. However, in addition to its low-temperature impact resistance property, I do not mention it.

Korean Patent No. 1683803 discloses a composition having improved warpage and deformation that is highly related to the moldability of a polypropylene impact block copolymer used for a sheet. However, in order to improve the low temperature impact strength when applied to a plastic corrugated cardboard, It is not mentioned.

Accordingly, the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a plastic corrugated cardboard which is suitable for plastic corrugated cardboard and has a high low temperature impact property while maintaining a flexural modulus, A polypropylene resin composition and a plastic corrugated cardboard made therefrom.

In order to solve the above-mentioned problems, the present invention provides a process for producing a fluorine-containing polymer, which comprises, by weight of 100 parts by weight of a mixture comprising 90 to 99% by weight of an impact block copolymer and 1 to 10% by weight of high- And 0.01 to 10 parts by weight of a polypropylene resin composition for plastic corrugated cardboard.

Also, the impact block copolymer has an ethylene content of 1 to 10% by weight and a melt index of 0.2 to 2 g / 10 min (230 ° C, 2.16 kg load).

Also, the high-density polyethylene has a density of 0.955 to 0.965 g / cm 3 and a melt index of 0.1 to 1 g / 10 min (190 캜, 2.16 kg load).

The present invention also provides a polypropylene resin composition for plastic corrugated cardboard, wherein the nucleating agent is zinc and calcium salt compounds.

Also, the processing aid comprises 10 to 40% by weight of the fluorine-based polymer and 60 to 90% by weight of the hydrophilic polymer, and provides the polypropylene resin composition for plastic corrugated cardboard

The fluorine-based polymer may be at least one selected from the group consisting of polyvinylidene fluoride, polytetrafluoroethylene, polychlorotrifluoroethylene, polyhexafluoropropylene, and polyvinyl fluoride, and the hydrophilic polymer may be at least one selected from the group consisting of polyethylene Wherein the polypropylene resin composition is at least one selected from the group consisting of glycols, cellulose-based resins, fatty acid vinyl ester-based resins, polyvinyl alcohol, acrylic resins and polyvinylpyrrolidone.

Further, 0.01 part by weight to 0.5 part by weight of tris (2,4-di-t-butylphenyl) phosphite as a phosphorus-based antioxidant, 100 parts by weight of tetrakis [ethylene-3- , 5-di-t-butyl-4-hydroxyphenyl) propionate] methane and 0.01 to 0.5 parts by weight of calcium stearate as a neutralizing agent. To provide a resin composition.

The resin composition preferably has a flexural modulus (ASTM evaluation method D790) of 11,000 kgf / cm 2 or more and an IZOD impact strength (-10 ° C) (ASTM evaluation method D256) of 6.0 kg · cm / And a weight deviation of not more than 1%. The present invention also provides a polypropylene resin composition for plastic corrugated cardboard.

[Method for Measuring Deviation of Molded Part Weight]

Using the resin composition, a plastic corrugated cardboard having a width of 2,300 mm, a thickness of 4 mm, a hollow thickness of 3.2 mm and a hollow space of 0.4 mm was formed by an extrusion molding machine. The center and side ends were cut into a size of 10 cm and 10 cm, And is calculated according to the following equation (1).

[Equation 1]

In order to solve the above-mentioned problems, the present invention provides a plastic corrugated cardboard made of the resin composition.

According to the present invention, there is provided a polypropylene resin composition for plastic corrugated cardboard, which has excellent low-temperature impact properties and excellent moldability while maintaining a flexural modulus, by using a processing aid containing high-density polyethylene, nucleating agent and fluoropolymer in an impact block copolymer .

In addition, the polypropylene resin composition according to the present invention can be effectively used in the production of plastic corrugated paper using an extrusion molding process or the like.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a sectional view of a general plastic corrugated cardboard;

Hereinafter, the present invention will be described in detail with reference to preferred embodiments. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately The present invention should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention. Accordingly, it is to be understood that the constituent features of the embodiments described herein are merely the most preferred embodiments of the present invention, and are not intended to represent all of the inventive concepts of the present invention, so that various equivalents, And the like.

The inventors of the present invention have found that the conventional plastic corrugated cardboard can be used in a normal atmospheric condition, but the use thereof is limited due to a low impact strength due to a low impact strength at a place where the air is falling below zero, As a result of investigating the problem of deteriorating the properties, it has been found that when a processing aid containing high density polyethylene, nucleating agent and fluoropolymer is added to an impact block copolymer in a specific composition, it is possible to maintain the flexural modulus, And the moldability is dramatically improved, leading to the present invention.

Accordingly, the present invention includes 0.05 to 1 part by weight of a nucleating agent and 0.01 to 10 parts by weight of a processing aid comprising a fluorine-based polymer, based on 100 parts by weight of a mixture consisting of 90 to 99% by weight of an impact block copolymer and 1 to 10% by weight of high- A polypropylene resin composition for a plastic corrugated cardboard.

Hereinafter, each constitution of the polypropylene resin composition according to the present invention will be described in detail.

(a) Impact block copolymer

In the present invention, the impact block copolymer may be prepared by a conventionally known method. For example, propylene and ethylene may be simultaneously charged into a polymerization reactor, triethylaluminum, a phthalate catalyst and a silane-based electron donor may be introduced, and gas phase polymerization may be carried out at a reaction temperature of 65 to 75 ° C and 32 to 34 atm.

The impact block copolymer may have an ethylene content of 1 to 10% by weight, preferably 4 to 10% by weight, and more preferably 6 to 8% by weight. If the ethylene content is less than 1 wt%, the low-temperature impact strength may be lowered. If the ethylene content is more than 10 wt%, the low-temperature impact strength is excellent, but the stiffness is decreased. In the present invention, the ethylene content is limited in terms of the low-temperature impact strength, and the high-density polyethylene used as a modifier is further added to the polypropylene used as the modifier, Thereby further improving the low temperature impact strength.

The impact block copolymer may have a melt index of 0.2 to 2 g / 10 min (230 ° C, 2.16 kg load), and preferably 0.8 to 1.2 g / 10 min. If the melt index is less than 0.2 g / 10 min, production may not be possible due to process problems. If the melt index exceeds 2 g / 10 min, the defective rate in the product extrusion process may increase.

(b) high density polyethylene

In the present invention, high-density polyethylene is used as a modifier of the impact block copolymer so as to maintain a low-temperature impact strength as required by the present invention in comparison with the use of an impact block copolymer alone. The high density polyethylene has a high density polyethylene having a density of 0.955 to 0.965 g / Can be used, and preferably high density polyethylene having a density of 0.959 to 0.963 g / cm < 3 > can be used. On the other hand, when linear low density polyethylene having a density of 0.91 to 0.93 g / cm 3 is used as a modifier, the low temperature impact strength is remarkably lowered.

The high-density polyethylene is contained in an amount of 1 to 10% by weight based on the total weight of the impact block copolymer and can be used in the range of 3 to 7% by weight for maximizing improvement in impact strength at low temperatures. When the content of the high-density polyethylene is less than 1% by weight, satisfactory low-temperature impact strength characteristics are difficult to exhibit. If the content of the high-density polyethylene exceeds 10% by weight, improvement in the degree of modification relative to the content is limited and moldability may be deteriorated. In order to maximize the improvement of the low-temperature impact strength, the melt index of the high-density polyethylene may be 0.1 to 1 g / 10 min (230 ° C, 2.16 kg load), preferably 0.3 to 0.8 g / 10 min.

(c) Nucleating agent

In the present invention, the nucleating agent is used for the purpose of preventing a decrease in rigidity and a decrease in heat resistance due to a decrease in the heat distortion temperature due to a decrease in the flexural modulus, which can be generated by the addition of the high density polyethylene used as a modifier. The impact block copolymer and the high density polyethylene 0.05 to 1 part by weight, preferably 0.1 to 0.3 part by weight, based on 100 parts by weight of the composition. When the content of the nucleating agent is less than 0.05 part by weight, it is difficult to obtain a sufficient flexural modulus and the crystallization rate effect may be deteriorated. When the amount of the nucleating agent is more than 1 part by weight, low temperature impact strength is lowered and further property improvement in terms of flexural modulus and crystallization speed is expected it's difficult.

As such a nucleus agent, organic nucleating agents such as zinc and calcium salt compounds, sorbitol compounds, phosphoric acid ester compounds and the like and inorganic nucleating agents such as talc can be used, but the remarkable improvement in rigidity and the rate of crystallization are further shortened, It is most preferable to use zinc and calcium salt compounds.

(d) Processing aid

In the present invention, the processing aid serves to improve the workability by facilitating the flowability of the resin composition due to the viscosity difference of the impact block copolymer and the high-density polyethylene used as the modifier.

As the processing aid, a processing aid containing a fluorine-based polymer is used in the present invention. Preferably, a processing aid comprising 10 to 40% by weight of a fluorine-based polymer and 60 to 90% by weight of a hydrophilic polymer may be used, 20 to 30% by weight of a fluorine-based polymer and 70 to 80% by weight of a hydrophilic polymer may be used.

The fluorine-based polymer may be, for example, polyvinylidene fluoride, polytetrafluoroethylene, polychlorotrifluoroethylene, polyhexafluoropropylene or polyvinyl fluoride, and the hydrophilic polymer may be, for example, polyethylene glycol, In view of improving the moldability in molding with a plastic corrugated cardboard having a high low temperature impact property while maintaining the flexural modulus of the resin composition to be finally produced, it may be a resin, a fatty acid vinyl ester resin, polyvinyl alcohol, an acrylic resin or polyvinylpyrrolidone It is most preferable to select polyvinylidene fluoride as the fluorine-based polymer and polyethylene glycol as the hydrophilic polymer.

On the other hand, a magnesium organic complex containing 80 to 95% by weight of magnesium hydroxystearate and 10 to 15% by weight of polyoxyethylene may be considered as another type of processing aid, but its performance is significantly lower than that of a processing aid containing a fluorine-based polymer .

The processing aid is used in an amount of 0.01 to 10 parts by weight, preferably 0.1 to 2 parts by weight, more preferably 0.1 to 1 part by weight, still more preferably 0.01 to 1 part by weight, based on 100 parts by weight of the impact block copolymer and high- 0.2 parts by weight, and most preferably 0.05 to 0.15 parts by weight. When the content of the processing aid is less than 0.01 part by weight, the functionalities of the processing aid in the extruder screw and the die are insufficient so that the flow of the resin to the end of the die is not smooth during the molding of the plastic corrugated cardboard, And the weight difference between the both side ends is generated, and when used excessively, there is little improvement in performance with respect to further processing aids.

(e) Other additives

In the polypropylene resin composition for plastic corrugated cardboard according to the present invention, it is preferable to simultaneously add a phosphorus-based antioxidant and a phenol-based antioxidant as additives, and the phosphorus-based antioxidant may be added to the impact block copolymer and high- 0.5 part by weight of the phenolic antioxidant and 0.01 to 0.5 part by weight of the phenolic antioxidant. Preferably, 0.05 to 0.15 parts by weight of the phosphorus antioxidant and 0.05 to 0.2 parts by weight of the phenolic antioxidant may be included.

If the content of the phosphorus antioxidant is less than 0.01 part by weight, pyrolysis of the polypropylene resin itself may occur during processing, adversely affecting the physical properties. If the content is more than 0.5 parts by weight, the color change after molding may be affected.

When the content of the phenolic antioxidant is less than 0.01 part by weight, the physical properties such as the yield stress may be affected. When the amount of the phenolic antioxidant is more than 0.5 parts by weight, Can affect the color change.

The phosphorus-based antioxidant and the phenol-based antioxidant are not particularly limited, and they may be used alone or in combination of two or more thereof. (2,4-di-t-butylphenyl) phosphite, and the phenolic antioxidant is tetrakis [ethylene-3- (3, Di-t-butyl-4-hydroxyphenyl) propionate] methane.

In the polypropylene resin composition for plastic corrugated board according to the present invention, the neutralizing agent is added in an amount of 0.01 to 0.5 parts by weight, preferably 0.05 to 1 part by weight, per 100 parts by weight of the impact block copolymer and high- 0.2 part by weight.

Examples of the neutralizing agent include fatty acid metal salts such as lithium stearate, calcium stearate and sodium stearate, and fatty acid amides such as ethylenebisstearoamide and stearic acid amide. However, in view of excellent low temperature impact strength and flexural modulus maintenance It is preferable to use calcium stearate.

In addition, the low-temperature impact strength and flexural modulus of the polypropylene resin composition to which the antistatic agent, the anti-blocking agent, the slip agent, the weathering / light stabilizer, the pigment, It can be added within a range that does not deteriorate.

The molded article produced from the polypropylene resin composition according to the present invention has excellent flexural modulus and low temperature impact strength, and can be effectively used as a material for plastic corrugated cardboard. Specifically, when the polypropylene resin composition according to the present invention is used for plastic corrugated cardboard, the IZOD impact strength (-10 ° C) (ASTM evaluation method D256) is 6.0 kg · cm / cm or more and the flexural modulus (ASTM evaluation method D790) is 11,000 kgf / Cm < 2 >, and the weight deviation of the molded article according to the following measurement method is 1% or less.

[Method for Measuring Deviation of Molded Part Weight]

Using the resin composition, a plastic corrugated cardboard having a width of 2,300 mm, a thickness of 4 mm, a hollow thickness of 3.2 mm and a hollow space of 0.4 mm was formed by an extrusion molding machine. The center and side ends were cut into a size of 10 cm and 10 cm, And is calculated according to the following equation (1).

[Equation 1]

The method for producing the polypropylene resin composition according to the present invention is not particularly limited and may be produced by mixing and extruding by a conventional method known in the art. For example, the polypropylene resin composition according to the present invention may be prepared by mixing the above ingredients in a Henschel mixer for 1 to 10 minutes, extruding the mixture in a twin extruder at a temperature in the range of 180 to 250 ° C, cooling and solidifying the mixture to form a pellet.

In the case of producing a plastic corrugated cardboard using the polypropylene resin composition according to the present invention, it is preferable to form the extruder at a molding temperature of 160 to 200 DEG C using the above composition, wherein the die temperature is 200 to 220 DEG C And 230 to 250 ° C at the end portion. If the temperature of the extrusion die is less than 200 ° C, the polypropylene resin may be insufficiently melted and the moldability may be insufficient. If the extrusion die temperature exceeds 250 ° C, the polymer may be decomposed to deteriorate the physical properties. The size of the extrusion die may be, for example, 2,300 mm in width and 4 mm in thickness, but is not limited to the above dimensions.

Hereinafter, embodiments of the present invention will be described in detail so that those skilled in the art can easily carry out the present invention. However, the following examples are illustrative of the present invention and are not intended to limit the scope of the present invention

Manufacturing Example: Impact Block Copolymer Manufacturing

The polymerization reactor was charged with propylene and ethylene at the same time, and triethylaluminum, a phthalate catalyst and a silane-based electron donor were introduced, and vapor phase polymerization was carried out at a reaction temperature of 65 to 75 ° C and a pressure of 32 to 34 atm. Propylene block copolymer was prepared, and the melt index (230 DEG C, 2.16 kg load) was adjusted to 1 g / 10 min by hydrogen.

Example 1

(a) Impact block copolymer 95% by weight and (b) 5% by weight low density impact modifier 5% by weight of high density polyethylene having a melt index (190 占 폚, 2.16 kg load) of 0.4 g / 10 min and a density of 0.959 g / (D) 0.07 parts by weight of a processing aid having a composition of 25% by weight of polyvinylidene fluoride and 75% by weight of polyethylene glycol, (e) 0.10 parts by weight of a phosphorus antioxidant 0.1 part by weight of low tris (2,4-di-t-butylphenyl) phosphite, 0.1 part by weight of tetrakis [ethylene-3- (3,5- Pyranate] methane and 0.05 parts by weight of calcium stearate as a neutralizing agent were mixed and mixed in a Henschel mixer for 5 minutes and then extruded by a twin-screw extruder at 180 to 220 ° C to prepare a pellet-shaped polypropylene resin composition.

Example 2

Example 1 was repeated except that (a) 93 weight% of impact block copolymer, (b) 7 weight% of high density polyethylene, (c) 0.2 weight part of nucleating agent and (d) A polypropylene resin composition was prepared in the same manner.

Example 3

A polypropylene resin composition was prepared in the same manner as in Example 1, except that (d) 25 parts by weight of polytetrafluoroethylene and 75 parts by weight of polyethylene glycol were used as the processing aid (d) in Example 1.

Example 4

A polypropylene resin composition was prepared in the same manner as in Example 1, except that (d) the processing aid was adjusted to 2 parts by weight in Example 1.

Comparative Example 1

A polypropylene resin composition was prepared in the same manner as in Example 1, except that (b) the high-density polyethylene was not used and (a) the impact block copolymer was adjusted to 100% by weight in Example 1.

Comparative Example 2

A polypropylene resin composition was prepared in the same manner as in Example 1, except that (c) a nucleating agent was not used in Example 1.

Comparative Example 3

A polypropylene resin composition was prepared in the same manner as in Example 1, except that (d) the processing aid was not used in Example 1.

Comparative Example 4

A polypropylene resin composition was prepared in the same manner as in Example 1, except that (d) a magnesium organic composite consisting of 90 wt% of magnesium and 10 wt% of polyoxyethylene was used as the processing aid in Example 1.

Comparative Example 5

Example 1 was prepared in the same manner as Example 1 except that (a) 85 weight% of impact block copolymer, (b) 15 weight% high density polyethylene, (c) 0.2 weight part of nucleating agent and (d) A polypropylene resin composition was prepared in the same manner.

Test Example

The polypropylene resin composition prepared according to the above Examples and Comparative Examples was extruded by a molding machine to prepare specimens for measurement of physical properties and extrusion molding machine (die temperature: 200 to 220 deg. C, 230 deg. C to 250 deg. To produce a molded plastic corrugated board having a width of 2,300 mm, a thickness of 4 mm, a hollow thickness of 3.2 mm and a hollow space of 0.4 mm. The IZOD impact strength, flexural modulus and weight deviation of each of the prepared specimens and plastic corrugated cardboard were measured by the following methods and the results are shown in Table 1. In order to determine the change in flowability by the processing aid, The results are shown in Table 2 below.

[How to measure]

(1) IZOD Impact Strength: Notched injection specimens were measured at -10 ° C and 50% relative humidity according to ASTM Rating Method D256.

(2) Flexural modulus: The injection specimen was measured at 23 DEG C and 50% relative humidity according to ASTM evaluation method D790.

(3) Weight Deviation of Molded Product: The center and the side edges of the plastic corrugated cardboard product were cut to a size of 10 cm and 10 cm, respectively, and then the weight was measured and calculated according to the following formula (1).

[Equation 1]

(4) Melt viscosity: Measured using a capillary rheometer. The measurement conditions were a heating temperature of 230 DEG C, a cylinder diameter of 9.55 mm, an orifice hole diameter of 0.76 mm, and an orifice length of 25.30 mm, and the melt viscosity of each shear rate was measured under the above conditions.

According to the present invention, when a processing aid containing high density polyethylene, a nucleating agent and a fluorine polymer is mixed with an impact block copolymer in a specific composition in an impact block copolymer according to the present invention, the low impact strength is excellent, And it is easy to bend even at room temperature. It is also confirmed that the plastic corrugated cardboard molded product has a small weight deviation and excellent moldability. However, when polytetrafluoroethylene is used as the fluorine-based polymer (Example 3), the weight deviation is somewhat lowered. Therefore, the fluorine-based polymer which satisfies both the low-temperature impact property, the flexural modulus, Lt; RTI ID = 0.0 > fluoride < / RTI > On the other hand, when the processing aid is excessively used (Example 4), it can be seen that the performance improvement with respect to the further processing aid is insignificant in terms of overall physical property balance.

On the other hand, when the impact modifier was not used (Comparative Example 1), the low temperature impact strength was so low that it was easily broken under the refrigerating conditions, and when the nucleating agent was not used (Comparative Example 2), the proportion of crystalline polypropylene was small, And when the flexural elastic modulus is lowered, the plastic corrugated cardboard easily bends at room temperature and is difficult to use.

In addition, when the processing aid was not used (Comparative Example 3), the physical properties of the low temperature impact strength and flexural modulus of the specimen were satisfactory, but the difference in weight between the central portion and the both end portions of the molded product of the plastic corrugated cardboard was increased, When the magnesium organic composite was used as the auxiliary agent (Comparative Example 4), the weight deviation of the molded article was remarkably increased.

In addition, when the high-density polyethylene content is excessive (Comparative Example 5), the low-temperature impact strength of the specimen increases, but the flexural modulus decreases and the weight deviation of the molded article increases.

On the other hand, referring to Table 2, when the processing aid of the preferred composition according to the present invention is used for the melt viscosity of the capillary rheometer (Examples 1 and 2 and Comparative Examples 1 and 2), similar melt viscosity is shown, It is seen that the melt viscosity is increased when the composition is not used or when a processing aid of a different composition is used (Comparative Examples 3 to 5), which means that the weight deviation of the molded article is increased.

While the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, Such modifications and changes are to be considered as falling within the scope of the following claims.

Claims (9)

0.05 to 1 part by weight of a nucleating agent and 0.01 to 10 parts by weight of a processing aid comprising a fluorine-based polymer, based on 100 parts by weight of a mixture consisting of 90 to 99% by weight of an impact block copolymer and 1 to 10% by weight of a high- Polypropylene resin composition. The method according to claim 1,
Wherein the impact block copolymer has an ethylene content of 1 to 10% by weight and a melt index of 0.2 to 2 g / 10 min (230 캜, 2.16 kg load). The method according to claim 1,
Wherein the high-density polyethylene has a density of 0.955 to 0.965 g / cm 3 and a melt index of 0.1 to 1 g / 10 min (190 캜, 2.16 kg load). The method according to claim 1,
Wherein the nucleating agent is zinc and a calcium salt compound. The method according to claim 1,
Wherein the processing aid comprises 10 to 40% by weight of the fluoropolymer and 60 to 90% by weight of the hydrophilic polymer. 6. The method of claim 5,
Wherein the fluoropolymer is at least one selected from the group consisting of polyvinylidene fluoride, polytetrafluoroethylene, polychlorotrifluoroethylene, polyhexafluoropropylene, and polyvinyl fluoride, and the hydrophilic polymer is at least one selected from the group consisting of polyethylene glycol , A cellulose-based resin, a fatty acid vinyl ester-based resin, polyvinyl alcohol, an acrylic resin, and polyvinylpyrrolidone. The method according to claim 1,
0.01 to 0.5 parts by weight of tris (2,4-di-t-butylphenyl) phosphite as a phosphorus-based antioxidant, 100 parts by weight of tetrakis [ethylene-3- -Di-t-butyl-4-hydroxyphenyl) propionate] methane, and 0.01 to 0.5 parts by weight of calcium stearate as a neutralizing agent are further included in the polypropylene resin composition for plastic corrugated cardboard . The method according to claim 1,
Wherein said resin composition has an IZOD impact strength (-10 캜) (ASTM evaluation method D256) of 6.0 kg cm m / cm or more and a flexural modulus (ASTM evaluation method D790) of 11,000 kgf / Of the polypropylene resin composition for plastic corrugated cardboard is 1% or less.
[Method for Measuring Deviation of Molded Part Weight]
Using the resin composition, a plastic corrugated cardboard having a width of 2,300 mm, a thickness of 4 mm, a hollow thickness of 3.2 mm and a hollow space of 0.4 mm was formed by an extrusion molding machine. The center and side ends were cut into a size of 10 cm and 10 cm, And is calculated according to the following equation (1).
[Equation 1]

A plastic corrugated board made from the resin composition of any one of claims 1 to 8.

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