KR101309354B1 - Polypropylene resin composition for non slip on woven bag and woven bag manufactured by using the same - Google Patents

Abstract

The present invention relates to a polypropylene resin composition for extrusion lamination, the polypropylene resin composition for extrusion lamination, comprising: (A) 75 to 85 parts by weight of a polypropylene polymer prepared by using a diether catalyst; (B) 15 to 25 parts by weight of low density polyethylene; And (C) 0.05 to 1 parts by weight of the masterbatch molecular weight regulator; providing a polypropylene resin composition for extrusion lamination, characterized in that the remarkable processing compared to the resin composition formed by crosslinking of the existing polypropylene and low density polyethylene It is possible to provide a polypropylene-based resin composition for lamination to improve the speed and neck toughness as well as to have an excellent inclination coefficient that could not be conventionally expected in a woven fabric bag manufactured by laminating such a resin composition.

Description

POLYPROPYLENE RESIN COMPOSITION FOR NON SLIP ON WOVEN BAG AND WOVEN BAG MANUFACTURED BY USING THE SAME}

The present invention relates to a polypropylene-based resin composition for extrusion lamination, and more particularly, to a polypropylene-based resin composition for extrusion lamination suitable for producing a woven molded bag having a low slipperiness and a woven molded bag manufactured using the same.

In general, as a packaging material of a resin material for packaging industrial raw materials, a woven molded bag as shown in FIG. 1 is used. In order to increase the suitability as an industrial packaging material such as a woven bag, for example, the surface of the polypropylene woven fabric is subjected to extrusion coating or laminating to modify the coated surface or the laminate surface, so that the packaged product can be loaded and moved. A method of imparting functionality so as not to slip down is disclosed.

Extrusion lamination (hereinafter, described as a concept including extrusion coating) is a method of heat-melting and kneading a raw material resin in an extruder, and then extruding it into a film state from an extrusion die, and coating the surface of the substrate to be coated with a rubber roll and As a method of pressing, cooling, and winding with a cooling roll, the film is widely used because it gives moisture-proof, gas barrier, abrasion resistance, oil resistance, heat sealability, etc. to thin film substrates such as films, sheets, paper, polypropylene woven fabrics, and nonwoven fabrics. have.

Typical resins used in such extrusion lamination processing include low-density polyethylene, medium-density polyethylene, ethylene-vinyl acetate copolymers, and polyolefin-based resins such as ionomer resins. Low-density polyethylene that can provide low softness is mainly used.

On the other hand, the conventional polypropylene resin has a lower melt tension than low-density polyethylene in spite of excellent moisture resistance, gas barrier properties, oil resistance, heat resistance, rigidity, etc. (the width of the extruded film than the width of the extruder die) This narrowing phenomenon is large, and weaving (phenomena in which the width of the film is not constant) and surging (phenomena in which the thickness is uneven in the take-out direction due to the extrusion amount is not fixed) during extrusion coating processing at high speed are easy to occur. This difficult drawback prevented the use of the actual extrusion lamination.

Therefore, a number of studies have been conducted to overcome these disadvantages and have had a considerable effect. For example, Korean Patent Laid-Open Publication No. 2005-77076 discloses a low density polyethylene having a density of 0.910-0.930 g / cm 3 in polypropylene. Disclosed is a polypropylene resin composition for extrusion coating comprising 5 to 20% by weight and 5 to 10% by weight of EPDM elastomer. Korean Patent No. 574682 discloses a high melt strength polypropylene resin composition in which long branches are introduced. Doing.

However, the prior patent does not refer to the inclination coefficient of the molded bag produced by extrusion lamination of the resin composition on the substrate, in the case of the molded bag using the resin composition according to the prior patent has a low inclination coefficient to prevent slipping when loading the packaged product There is a problem that an adhesive or the like must be applied separately between the products.

Accordingly, the present invention has been made to solve the above problems, using a low density polyethylene that was commonly used with polypropylene resin, but retains the existing excellent physical properties in the film laminated extrusion using a specific polypropylene resin Of course, to provide a polypropylene-based resin composition that can give an improved gradient coefficient of 40 degrees or more.

In addition, the present invention provides a polypropylene resin composition having improved crosslinking properties and high-speed processability of a polypropylene resin and a low density polyethylene without additional crosslinking agents, including a master batch of an optimum component and composition.

Another object of the present invention is to provide a woven molded bag having a low slipperiness produced by extrusion lamination of the polypropylene resin composition.

According to an aspect of the present invention,

(1) Polypropylene-based resin composition for extrusion lamination, comprising: (A) 75 to 85 parts by weight of a polypropylene polymer prepared by using a diether catalyst; (B) 15 to 25 parts by weight of low density polyethylene; It provides a polypropylene-based resin composition for extrusion lamination comprising (C) 0.05 to 1 parts by weight of the masterbatch molecular weight regulator.

(2) In the above (1), the (A) polypropylene polymer is a polypropylene homopolymer, the melting temperature is 164 ℃ or less, the melt index is 10 ~ 20g / 10min (230 ℃, 2.16kgf) It provides a polypropylene resin composition for extrusion lamination characterized in that.

(3) The polypropylene for extrusion lamination according to (1), wherein the low density polyethylene (B) has a melt index of 8 to 30 g / 10 min (190 ° C, 2.16 kgf) and a density of 0.915 g / cm 3 or less. Provided is a propylene resin composition.

(4) In the above (1), the (C) molecular weight regulator masterbatch is 80 to 90 parts by weight of the tripolymer consisting of 0.1 to 5% by weight of ethylene, 0.1 to 10% by weight butene and 85 to 99.9% by weight of propylene It provides a polypropylene resin composition for lamination comprising 10 to 20 parts by weight of a regulator.

(5) The method according to (4), wherein the molecular weight modifier is methyl ethyl ketone peroxide, methyl isobutyl ketone peroxide, 2,4,4-trimethylpentyl-2-hydroperoxide, diisopropyl benzene hydroperoxide, Isobutyl peroxide, 2,4-dichlorobenzoyl peroxide, benzoyl peroxide, 1,3-bis (t-butyl peroxyisopropylene) benzene, 2,5-dimethyl-2,5-di (t-butyl peroxide Oxy) hexane, 1,1-di (t-butyl peroxy) -3,3,5-trimethyl cyclohexane, 2,2-di (t-butyl peroxy) butane, 2,2,4-trimethylpentyl per Polyoxy for lamination, characterized in that at least one selected from the group consisting of oxy neodecanoate, t-butyl peroxy neodecanoate, di-3-methoxybutyl peroxydicarbonate, t-butyl peroxyisopropyl carbonate Provided is a propylene resin composition.

(6) The polypropylene resin composition for lamination according to the above (1), wherein the inclination coefficient of the film laminated using the polypropylene resin composition for lamination is 40 degrees or more.

The present invention for solving the another problem,

Provided is a woven molded bag produced by extrusion lamination of the polypropylene resin composition for any one of the above (1) to (6).

The polypropylene resin composition for lamination according to the present invention includes a polypropylene polymer prepared by using a diether catalyst and a resin composition formed by crosslinking of existing polypropylene and low density polyethylene, including a molecular weight regulator masterbatch. On the contrary, it is possible to provide a polypropylene-based resin composition for lamination that has a remarkable processing speed and neck toughness as well as an excellent inclination coefficient that was not previously expected in a woven fabric bag manufactured by laminating such a resin composition.

Figure 1 is a photograph showing the appearance of the woven forming bag used in the technical field of the present invention.

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 present inventors maintained the excellent properties of polypropylene and low density polyethylene when laminating a packaging substrate such as a woven bag using a polypropylene resin composition including a polypropylene polymer and low density polyethylene, as well as excellent processability and improved extrusion speed. As a result of intensive studies to develop a polypropylene resin composition having an inclination coefficient, a polypropylene polymer prepared using a diether catalyst as a polypropylene polymer is used, and the content of a molecular weight regulator masterbatch composed of predetermined components and compositions is included. According to the present invention, the present invention was accomplished based on this finding.

Accordingly, the present invention provides a polypropylene resin composition for extrusion lamination, comprising: (A) 75 to 85 parts by weight of a polypropylene polymer prepared by using a diether catalyst; (B) 15 to 25 parts by weight of low density polyethylene; And (C) 0.05 to 1 parts by weight of the molecular weight regulator masterbatch. Here, the term 'composition' means a state before a specific product is specified through molding. For example, it may mean a material in the form of pellets or a mixture of compounding steps, and thus, even if the first molding process such as pellet form is completed, the embodiment of the present invention will be regarded as an aspect before completion into a specific final product form.

In addition, the composition of the present invention is not used alone, it is used to cover the surface of the existing film, sheet, paper, resin woven fabric or nonwoven fabric and the like to overcome the disadvantages of these to be suitable for use as a packaging material. In addition, when the composition of the present invention is subjected to extrusion lamination on the surface of paper, film, sheet, woven fabric or nonwoven fabric of resin material or the like, the extrusion lamination speed can be improved to significantly increase productivity.

First, each said component which comprises the polypropylene resin composition for extrusion lamination of this invention is demonstrated concretely.

The polypropylene polymer of the present invention may be prepared using a diether based catalyst. Currently, polypropylene resins are mostly manufactured using Ziegler-Natta catalysts, and the phthalate system is mainly used as an internal donor, which is a constituent of the catalyst, but in the present invention, an improved Ziegler-Natta catalyst is used. As polyether polymers prepared using dieter-based internal electron donor materials are used.

As described above, the present inventors have found that when extrusion laminates a polypropylene resin composition having a relatively narrow molecular weight distribution on the surface of a substrate such as a packaging material, the neck toughness as well as the inclination coefficient of the film surface are significantly improved during extrusion. . That is, there are still technical limitations in lowering the molecular weight distribution of the polypropylene polymer prepared using the internal electron donor material of the phthalate system, which has been mainly used in the related art. Thus, the present invention excludes the use of the catalyst of the phthalate system. In order to have a narrow molecular weight distribution, a polypropylene polymer prepared using a catalyst of a diether system is used.

The diether-based catalyst may be a conventional diether-based catalyst known in the art, for example, 2,2-diisobutyl-1,3-dimethoxypropane (2,2-diisobutyl-1,3 -dimethoxypropane) compound is mentioned.

The polypropylene polymer is included 75 to 85 parts by weight based on 100 parts by weight of the total polypropylene polymer and the low density polyethylene. When the polypropylene polymer content is less than 75 parts by weight, oil resistance, rigidity and high-speed productivity may be reduced during extrusion lamination, and when it exceeds 85 parts by weight, the neck-in may be large and may not be suitable for extrusion lamination due to weaving and surging. have.

On the other hand, the polypropylene polymer is preferably a propylene homopolymer. Thereby, the adhesiveness with respect to the base material of the laminated film is improved and there exists an effect of obtaining the outstanding inclination coefficient.

In addition, the polypropylene polymer preferably has a melting temperature of 164 ° C. or less, and a melt index of 10-20 g / 10 min (230 ° C., 2.16 kgf) in order to obtain a desired workability and gradient coefficient effect of the present invention. Do.

The polypropylene resin composition for extrusion lamination according to the present invention contains low density polyethylene in order to further improve the neck-in, surging, weaving phenomenon, etc. according to the polypropylene polymer component to be suitable for extrusion lamination. The low density polyethylene is contained in an amount of 10 to 25 parts by weight in order to achieve the desired processability and gradient coefficient effects of the present invention and to maintain the basic physical properties of the polypropylene resin.

In addition, in order to obtain the desired effect of the present invention to the maximum, the density of the low-density polyethylene is preferably 0.915 g / cm 3 or less, more preferably 0.900 g / cm 3 or less, and the melt index is 8 to 30 g / 10 min (190 ° C.). , 2.16 kgf).

On the other hand, the polypropylene resin composition for extrusion lamination according to the present invention does not have a long chain branching to crosslink the low-density polyethylene component difficult to crosslink with the polypropylene polymer, crosslinking between the main chain in response to polypropylene or polyethylene And a predetermined master batch composition to cause.

The master batch composition is preferably a tripolymer consisting of 0.1 to 5% by weight of ethylene, 0.1 to 10% by weight of butene and 85 to 99.9% by weight of propylene. It provides sufficient crosslinkability to polypropylene polymers and low density polyethylene as well as improved high speed processability.

The masterbatch composition is composed of a molecular weight regulator masterbatch including 10 to 20 parts by weight of a molecular weight regulator to be described together with 80 to 90 parts by weight of the terpolymer, the molecular weight regulator masterbatch is the polypropylene polymer and the low density polyethylene 0.05-1 weight part with respect to a total of 100 weight parts. When the content of the molecular weight regulator masterbatch is less than 0.05 parts by weight, the chain reaction may be weak, so that sufficient crosslinking may not be achieved. If the content exceeds 1 part by weight, the excessive flow of the resin may result in an uneven flow of the resin. have.

On the other hand, in order to provide the high speed workability which is an effect of the present invention, melt flow is important, which can be achieved by the following two methods. The first method is to polymerize a resin having a melt index of 10 g / 10 min (230 ° C., 2.16 kg) or more by polymerization, and the second method is to increase the melt index by decomposing crosslinking by adding a molecular weight modifier. Adopted to incorporate into the masterbatch composition, but found the optimum composition.

That is, the molecular weight modifier content may be contained 10 to 20 parts by weight based on 100 parts by weight of the masterbatch, as described above, to provide a polypropylene-based resin composition having a specific melt index by decomposing the crosslinking. That is, the total amount of the polypropylene polymer and the low density polyethylene 100 parts by weight may include 0.005 to 0.2 parts by weight. When the content of the molecular weight regulator is less than 0.005 parts by weight based on 100 parts by weight of the total polypropylene polymer and the low density polyethylene, it may be difficult to increase the melt index of the polymerized polypropylene resin composition to 15 g / 10 min or more, and 0.2 parts by weight. If exceeded, overdegradation of the polypropylene polymer may inhibit the basic properties of the polypropylene.

Although it does not specifically limit as said molecular weight modifier, For example, methyl ethyl ketone peroxide, methyl isobutyl ketone peroxide, 2,4,4- trimethyl pentyl-2- hydroperoxide, diisopropyl benzene hydroperoxide , Isobutyl peroxide, 2,4-dichlorobenzoyl peroxide, benzoyl peroxide, 1,3-bis (t-butyl peroxyisopropylene) benzene, 2,5-dimethyl-2,5-di (t-butyl Peroxy) hexane, 1,1-di (t-butyl peroxy) -3,3,5-trimethyl cyclohexane, 2,2-di (t-butyl peroxy) butane, 2,2,4-trimethylpentyl Peroxy neodecanoate, t-butyl peroxy neodecanoate, di-3-methoxybutyl peroxydicarbonate, t-butyl peroxyisopropyl carbonate may be one or more selected from the group consisting of.

Polypropylene-based resin composition for lamination according to the present invention described above can have a workability such as extrusion speed, neck toughness and the like better than conventional when extrusion processing using the same, in particular, the surface of the substrate such as woven fabric by extruding the resin composition The laminated film formed on the may have a coefficient of inclination of 40 degrees or more to allow the slipperiness of the packaged product to be significantly improved.

On the other hand, the polypropylene resin composition for lamination according to the present invention may further include conventional additives well known according to the intention of the operator or the use of the final product, in addition to the above-described components. For example, 1,3,5-tri- (3,5-di-t-butyl-4-hydroxybenzyl) isocyanate, octadecyl-3- (3,5-di-t-butyl-4-hydroxy 0.1 weight of phenol-based antioxidants (D) such as oxyphenyl) propionate and neutralizing agents (E) such as calcium stearate and magnesium aluminum hydroxycarbonate, respectively, based on 100 parts by weight of the polypropylene polymer and 100 parts by weight of the low density polyethylene, respectively. Can be used in combination.

Hereinafter, an Example and a comparative example are given and this invention is demonstrated in detail.

First, the evaluation method of the various physical properties adopted by the following example and the comparative example was performed by the following test method.

(1) Melt index

It measured by ASTM D-1238 method.

(2) melting temperature

Using a Staton Redcroft DSC 700 (PL Thermal, UK), the sample volume was 5.0 mg, and the temperature was raised to 230 ° C. at a heating rate of 10 ° C./min. The maximum magnitude peak of the second run melting curve was taken as the melting peak, and the peak temperature of the melting peak was taken as the melting point.

(3) processing speed

It measured using the extrusion lamination processing apparatus of dice width 1200mm. Set the extrusion amount to maintain the laminate thickness of 20 μm at a temperature of 290 ° C., a diameter of 90 mm and a pulling speed of 120 m / min, and increase the take-up speed while maintaining a constant extrusion amount, so that no breakage of the film occurs. Was measured.

(4) Neck toughness

The melt width is measured by the difference between the die width and the coating width after the extrusion lamination processing, but the value at the time of processing at 80m / min was measured to make a laminate of 20㎛ thickness on the OPP film of 20㎛ thickness.

(5) slope factor

It was laminated on a polypropylene woven fabric with a thickness of 30 μm and left for 24 hours in a constant temperature and humidity chamber having a temperature of 23 ± 1 ° C. and a humidity of 50 ± 5%.

[ Example  One]

(A) 85 parts by weight of a polypropylene homopolymer powder having a melt index of 16 g / 10 min (230 ° C., 2.16 kg f) and a melting temperature of 164 ° C., (B) a melt index of 12 g / 10 min (190 ° C., 2.16 kg f) and a density of 0.914. 90 parts by weight of a tripolymer consisting of 15 parts by weight of a low density polyethylene having a g / cm 3, (C) 5% by weight of ethylene, 10% by weight of butene and 85% by weight of propylene, and a 1,3-bis (t-butyl peroxyiso) 0.05 parts by weight of a molecular weight regulator masterbatch containing 10 parts by weight of propylene) benzene, and (D) 1,3,5-tri- (3,5-di-t-butyl-4-hydroxybenzyl) isocyanate as a phenolic antioxidant 0.1 parts by weight and 0.1 parts by weight of calcium stearate were added with (E) neutralizing agent, mixed with a Henschel mixer for about 5 minutes, and extruded at an extruder at 200 to 210 ° C to prepare a pellet-like composition.

[ Example  2]

(C) A composition was prepared in the same manner as in Example 1, except that 0.1 part by weight of the molecular weight regulator masterbatch was contained.

[ Example  3]

(C) A composition was prepared in the same manner as in Example 1 except that 0.12 parts by weight of the molecular weight regulator masterbatch was contained.

[ Example  4]

A composition was prepared in the same manner as in Example 2, except that 83 parts by weight of the polypropylene homopolymer powder and 17 parts by weight of the low density polyethylene were contained.

[ Example  5]

(C) A composition was prepared in the same manner as in Example 4, except that 0.15 parts by weight of the molecular weight regulator masterbatch was contained.

[ Example  6]

A composition was prepared in the same manner as in Example 2, except that 80 parts by weight of (A) polypropylene homopolymer powder and 20 parts by weight of (B) low density polyethylene were contained.

[ Example  7]

A composition was prepared in the same manner as in Example 3, except that 78 parts by weight of (A) polypropylene homopolymer powder and 22 parts by weight of (B) low density polyethylene were contained.

[ Example  8]

A composition was prepared in the same manner as in Example 5, except that 75 parts by weight of (A) polypropylene homopolymer powder and 25 parts by weight of (B) low density polyethylene were contained.

[ Comparative example  One]

A composition was prepared in the same manner as in Example 1, except that 87 parts by weight of polypropylene homopolymer powder having a melt index of 18 g / 10 min (230 ° C., 2.16 kg) and 13 parts by weight of low density polyethylene were contained. It was.

[ Comparative example  2]

(B) A composition was prepared in the same manner as in Example 1, except that low density polyethylene having a density of 0.924 g / cm 3 was used.

[ Comparative example  3]

(C) A composition was prepared in the same manner as in Comparative Example 2 except that 0.1 parts by weight of the molecular weight regulator masterbatch was contained.

[ Comparative example  4]

(C) A composition was prepared in the same manner as in Comparative Example 2 except that 0.15 parts by weight of the molecular weight regulator masterbatch was contained.

[ Comparative example  5]

(C) A composition was prepared in the same manner as in Comparative Example 2 except that 0.2 parts by weight of the molecular weight regulator masterbatch was contained.

[ Comparative example  6]

(B) A composition was prepared in the same manner as in Comparative Example 2 except that a low density polyethylene having a density of 0.914 g / cm 3 was used and 0.03 parts by weight of the (C) molecular weight regulator masterbatch was contained.

[ Comparative example  7]

(C) A composition was prepared in the same manner as in Comparative Example 6 except that 1.2 parts by weight of the molecular weight regulator masterbatch was contained.

[ Comparative example  8]

A composition was prepared in the same manner as in Comparative Example 6 except that (A) 87 parts by weight of polypropylene homopolymer powder, (B) 13 parts by weight of low density polyethylene and (C) 0.05 parts by weight of the molecular weight regulator masterbatch were contained.

[ Comparative example  9]

A composition was prepared in the same manner as in Comparative Example 6 except that 72 parts by weight of (A) polypropylene homopolymer powder, 28 parts by weight of (B) low density polyethylene, and 0.15 parts by weight of (C) molecular weight modifier masterbatch were contained.

The compositions according to the above examples and comparative examples were molded in an extrusion laminate machine having a diameter of 60 mm, and measured for various physical properties according to the above-described methods, and the results are shown in Table 1 below.

Referring to Table 1, in the case of the composition according to Examples 1 to 8, the processing speed and the neck toughness are generally good, and in particular, it can be seen that the inclination coefficient is all 40 degrees or more.

On the contrary, when (C) does not contain a molecular weight regulator masterbatch (Comparative Example 1), although the melt index of the polypropylene polymer is rather high, it can be seen that it cannot be used for extrusion lamination. It can be seen that when the low density polyethylene (B) having a high density is contained (Comparative Examples 2 to 5), the inclination coefficient does not reach the object of the present invention.

In addition, when (C) the molecular weight regulator masterbatch content is small (Comparative Example 6), sufficient crosslinking is not formed, and the inclination coefficient is somewhat insufficient, and when the content is excessive (Comparative Example 7), the flow of resin is uneven and the inclinometer The lack of number, of course, can be seen that the neck toughness is not good.

Also, when the content of (A) polypropylene polymer and (B) low-density polyethylene content according to the present invention is out of the ratio, that is, (A) the content of polypropylene polymer is excessive (Comparative Example 8), the neck toughness and the inclination coefficient are It does not fall within the content ratio range according to (B) when the low density polyethylene content is excessive (Comparative Example 9) it can be seen that the neck toughness and the coefficient of inclination is excellent but the high-speed workability is significantly reduced.

As described above, the polypropylene resin composition for lamination according to the present invention is excellent in overall processing speed and neck toughness as compared with the resin composition formed by crosslinking of the existing polypropylene and low density polyethylene, and particularly, the resin composition Lamination to have an excellent coefficient of inclination during manufacture, it is possible to reliably improve the slip phenomenon during the loading and movement of the product packaging material, such as woven fabric forming bag.

Claims (7)

In the polypropylene resin composition for extrusion lamination,
(A) 75 to 85 parts by weight of a polypropylene polymer prepared using a diether based catalyst;
(B) 15 to 25 parts by weight of low density polyethylene; And
(C) 0.05 to 1 parts by weight of the molecular weight regulator masterbatch;
Including but not limited to:
The (C) molecular weight regulator masterbatch is characterized in that it comprises 80 to 90 parts by weight of a terpolymer consisting of 0.1 to 5% by weight of ethylene, 0.1 to 10% by weight of butene and 85 to 99.9% by weight of propylene and 10 to 20 parts by weight of the molecular weight regulator. Polypropylene resin composition for extrusion lamination to be. The method of claim 1,
The polypropylene polymer (A) is a polypropylene homopolymer, has a melting temperature of 164 ° C. or less, and a melt index of 10 to 20 g / 10 min (230 ° C., 2.16 kgf). Composition. The method of claim 1,
The low-density polyethylene (B) has a melt index of 8 to 30 g / 10 min (190 ° C., 2.16 kgf) and a density of 0.915 g / cm 3 or less, polypropylene resin composition for extrusion lamination. delete The method of claim 1,
The molecular weight modifier is methylethyl ketone peroxide, methyl isobutyl ketone peroxide, 2,4,4-trimethylpentyl-2-hydroperoxide, diisopropyl benzene hydroperoxide, isobutyl peroxide, 2,4-dichloro Benzoyl peroxide, benzoyl peroxide, 1,3-bis (t-butyl peroxyisopropylene) benzene, 2,5-dimethyl-2,5-di (t-butyl peroxy) hexane, 1,1-di ( t-butyl peroxy) -3,3,5-trimethyl cyclohexane, 2,2-di (t-butyl peroxy) butane, 2,2,4-trimethylpentyl peroxyneodecanoate, t-butyl peroxy Polypropylene resin composition for extrusion lamination, characterized in that at least one selected from the group consisting of oxyneodecanoate, di-3-methoxybutyl peroxydicarbonate, t-butyl peroxyisopropyl carbonate. The method of claim 1,
The polypropylene resin composition for extrusion lamination, characterized in that the inclination coefficient of the film laminated using the polypropylene resin composition for lamination is 40 degrees or more. A woven molded bag produced by extrusion laminating the polypropylene resin composition for extrusion lamination according to any one of claims 1 to 3, 5 and 6.

Images