JP2000001581A - Polypropylene polymer composition used for inflation molding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a polypropylene polymer compsn. which can be molded into a film excellent in smoothness, antifogging properties, clarity, and antiblocking properties by incorporating an additive formed from a polyhydric alcohol fatty acid ester and a specific amide compd., org. crosslinked spherical particles, and a fatty acid amide, each in a specified amt., into a PP polymer. SOLUTION: This compsn. contains 100 pts.wt. PP polymer, 0.3-1 pt.wt. additive formed from a polyhydric alcohol fatty acid ester and an amide compd. of the formula in a wt. ratio of (80/20)-(20/80), 0.2-0.6 pt.wt. at least one kind of org. crosslinked spherical particles selected form among spherical particles of a crosslinked silicone, crosslinked polyamide, crosslinked polytriazine, crosslinked polyacryl, and crosslinked PS, and 0.01-0.1 pt.wt. at least one fatty acid amide selected from among [N-(1-18C) alkyl-substd.] fatty acid amides having a 16-22C acyl group and bis(fatty acid) amides having a 16-22C acyl group. In the formula, R is 8-22C alkanoyl or 16-22C alkenoyl; and m and n are each 1-4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a polypropylene polymer composition used for an inflation molding method.
Methods for forming a polyolefin-based film include an inflation molding method and a cast molding method. The inflation molding method has an advantage that, when compared with the cast molding method, no secondary processing is required when molding a bag, and also has an advantage that a molding device is small when molding a wide film. It is widely used for forming bags and wide films. The present invention can be provided with excellent smoothness, anti-fogging property, transparency and anti-blocking property at the same time when a polypropylene film is formed by an inflation molding method, particularly among a polyolefin film. The present invention relates to a polypropylene polymer composition.

[0002]

2. Description of the Related Art Heretofore, as a polymer composition for forming a polyolefin-based film, a polyolefin-based polymer has been added with 1) polyoxyalkylene to impart smoothness, antifogging property, anti-blocking property, etc. to the polyolefin-based film. Example in which an alkylolamide having a chain is blended with inorganic particles (JP-A-4-323228), 2) Example in which a polyhydric alcohol fatty acid ester and inorganic particles are blended (JP-A-Hei-4)
-220445), 3) Example in which alkylolamide and organic particles are blended (JP-A-8-59852), 4) Mixture of polyhydric alcohol fatty acid ester and alkylolamine, fine powder of amorphous silica and fatty acid amide Example of blending (JP-A-2-187441), 5) Example of blending a mixture of a polyhydric alcohol fatty acid ester and an alkylolamine, silicone rubber particles and a fatty acid amide (JP-A-4-18741)
-220436), 6) Examples of blending inorganic particles and a fatty acid amide (Japanese Patent Application Laid-Open No. 4-220443) have been proposed. However, in these conventional examples, when they are subjected to a cast molding method to form a polyolefin-based film, some of them exhibit a corresponding effect, but they are subjected to an inflation molding method to form a polyolefin-based film. In such a case, the molding operation requires smoothness at the time of molding more than the case of molding by a cast molding method, and therefore, the use of a relatively large amount of a smoothing agent causes the manifestation of the effect to be generally low and When a polypropylene-based film is formed as a polyolefin-based film, at least one of smoothness, anti-fog properties, transparency, and anti-blocking property is imparted to the polypropylene-based film. However, there is a disadvantage that they cannot be satisfied at the same time.

[0003]

The problem to be solved by the present invention is that when a conventional polypropylene polymer composition is used to produce a polypropylene film by an inflation molding method, the production of the polypropylene film is difficult. It is a point that the imparting of smoothness, anti-fogging property, transparency and anti-blocking property cannot be simultaneously satisfied.

[0004]

Means for Solving the Problems Thus, the present inventors have
As a result of studying to solve the above problems, a polypropylene polymer composition in which a specific additive A, a specific additive B, and a specific additive C are blended in a predetermined ratio with respect to a polypropylene polymer is correctly preferred. Was found.

That is, the present invention relates to a polypropylene polymer composition for use in an inflation molding method comprising a polypropylene polymer, the following additive A, the following additive B and the following additive C, 0.3 to 1 part by weight of the additive A, 0.2 to 0.6 part by weight of the additive B, and the additive C based on 100 parts by weight of the polymer.
Is contained in a proportion of 0.01 to 0.1 part by weight.

Additive A: A polyhydric alcohol fatty acid ester and an amide compound represented by the following formula 1 are obtained by mixing the polyhydric alcohol fatty acid ester / the amide compound = 80 / 20-
An additive consisting of a ratio of 20/80 (weight ratio)

[0007]

(Equation 1)

In the formula 1, R is an alkanoyl group having 8 to 22 carbon atoms or a alkanoyl group having 16 to 22 carbon atoms.
22 alkenoyl groups m, n: an integer of 1 to 4

Additive B: One or more organic crosslinked spherical particles selected from crosslinked silicone spherical particles, crosslinked polyamide spherical particles, crosslinked polytriazine spherical particles, crosslinked polyacrylic spherical particles and crosslinked polystyrene spherical particles.

Additive C: acyl group having 16 to 22 carbon atoms
A N-alkyl-substituted fatty acid amide wherein the acyl group has 16 to 22 carbon atoms and the alkyl group has 1 to 18 carbon atoms, and the acyl group has 16 to 2 carbon atoms.
One or more fatty amides selected from bis fatty amides which are 2

The polypropylene-based polymer used in the present invention includes 1) a homopolymer of propylene, and 2) propylene having an α-polymer such as ethylene, 1-butene, 1-pentene, 1-hexene, or 4-methyl-1-pentene. Copolymers obtained by copolymerizing an olefin with propylene at a ratio of 10 mol% or less, and 3) a blend polymer of the above 1) and 2). In the present invention, the density of the polypropylene polymer used in the present invention is not particularly limited, but those having a density of 0.900 to 0.910 g / cm ³ can be advantageously used. The present invention does not particularly limit the melt flow rate (hereinafter, referred to as MFR) of the polypropylene polymer used in the present invention, but the MFR at 230 ° C. under a load of 2.16 kg is 0.1 to 11 g / 10 min. Can be advantageously used.

The additive A used in the present invention comprises a polyhydric alcohol fatty acid ester and the amide compound represented by the above formula (1). As the polyhydric alcohol fatty acid ester constituting the additive A, known ones can be used. Among them, a dihydric to hexahydric aliphatic alcohol and a carbon number of 8 to 8 are preferred.
Polyhydric alcohol fatty acid esters obtained from 22 fatty acids can be advantageously used. Examples of such polyhydric alcohol fatty acid esters include: 1) a complete ester obtained by esterifying all hydroxyl groups of a di- to hexa-valent aliphatic alcohol with a fatty acid;
2) Partial esters obtained by esterifying a part of the hydroxyl groups of a divalent to hexavalent aliphatic alcohol with a fatty acid are exemplified.

The dihydric to hexahydric aliphatic alcohol used as a raw material for obtaining a polyhydric alcohol fatty acid ester includes 1) ethylene glycol, propylene glycol,
1,3-butylene glycol, diethylene glycol,
Divalent aliphatic alcohols such as triethylene glycol and dipropylene glycol, 2) trivalent aliphatic alcohols such as glycerin and trimethylolpropane, 3) tetravalent fats such as diglycerin, triglycerin, pentaerythritol and sorbitan Aliphatic alcohols, 4) 5- or 6-valent aliphatic alcohols such as sorbitol and tetraglycerin, among which 3 or 4 having 3 to 6 carbon atoms.
Trivalent aliphatic alcohols are preferred, and glycerin is particularly preferred. As the fatty acid having 8 to 22 carbon atoms used as a raw material for obtaining a polyhydric alcohol fatty acid ester,
1) C8-C such as n-octanoic acid, isooctanoic acid, nonanoic acid, decanoic acid, lauric acid, myristic acid, palmitic acid, isopalmitic acid, stearic acid, behenic acid, etc.
22 saturated fatty acids, 2) oleic acid, ricinoleic acid,
Examples thereof include unsaturated fatty acids having 16 to 22 carbon atoms such as oleic acid and linoleic acid, and among them, saturated fatty acids having 18 to 22 carbon atoms such as stearic acid and behenic acid are preferable.

Specific examples of polyhydric alcohol fatty acid esters obtained from aliphatic alcohols and fatty acids as described above include: 1) ethylene glycol mono-n-octanoate, propylene glycol monolaurate, and 1,3 monostearic acid. -Butylene glycol, diethylene glycol monostearate, diethylene glycol monooleate, ethylene glycol di-n-octanoate, propylene glycol dilaurate, distearic acid-
Esters of dihydric aliphatic alcohols and fatty acids, such as 1,3-butylene glycol, diethylene glycol distearate, diethylene glycol dioleate,
2) Glycerin monolaurate, glyceryl monostearate, glyceryl monobehenate, glyceryl monooleate, glyceryl dilaurate, glyceryl distearate, glyceryl dibehenate, glyceryl dioleate, glyceryl trilaurate, glyceryl tristearate, glyceryl tribehenate, trio Glycerin oleate, Trimethylolpropane monolaurate, Trimethylolpropane monostearate, Trimethylolpropane monobehenate, Trimethylolpropane dilaurate, Trimethylolpropane distearate, Trimethylolpropane dibehenate, Trimethylolpropane trilaurate, Tristearic acid Trimethylolpropane, trimethylolpropane tribehenate, triolei Such as trimethylolpropane,
Esters of trihydric aliphatic alcohols and fatty acids, 3) diglycerin monolaurate, triglycerin monolaurate, pentaerythritol monolaurate, sorbitol monolaurate, diglycerin monostearate,
Tetravalent aliphatics such as pentaerythritol monobehenate, diglycerin dilaurate, triglycerin distearate, pentaerythritol distearate, diglycerin trilaurate, diglycerin tetralaurate, pentaerythritol tristearate, and pentaerythritol tetrastearate Esters of alcohols and fatty acids, 4) triglycerin monostearate, triglycerin distearate, triglycerin tristearate, triglycerin tetrastearate, sorbitol dilaurate, sorbitol trilaurate, sorbitol tetralaurate, sorbitol pentalaurate, Sorbitol hexalaurate, tetraglycerin distearate, tetraglycerin tristearate, tetrastearate Phosphate tetraglycerol, such as penta monostearate tetraglycerol include esters of 5 or 6 monovalent aliphatic alcohols and fatty acids.

The amide compound constituting the additive A includes:
1) N, N-bis (hydroxyethyl) fatty acid amide when m and n in the formula 1 are 1; 2) when m or n in the formula 1 is 1 and 3 ≦ m + n ≦ 8 N-hydroxyethyl-N-polyoxyethylene fatty acid amide; 3) m and 2 in the formula 1 are 2 or more and 4 ≦ m + n
N, N-bis (polyoxyethylene) when ≦ 8
Fatty acid amides are included.

In the formula 1, R represents 1) an alkanoyl group having 8 to 22 carbon atoms such as an octanoyl group, a nonanoyl group, a decanoyl group, a hexadecanoyl group, an octadecanoyl group, an eicosanoyl group and a docosanoyl group; An alkenoyl group having 16 to 22 carbon atoms, such as a hexadecenoyl group, an octadecenoyl group, and an eicosenoyl group, is exemplified. Among them, an alkanoyl group having 16 to 22 carbon atoms is preferable. Further, in the formula 1, m and n are integers of 1 to 4, but those where m and n are 1 are preferable.

Specific examples of preferred amide compounds include:
1) N, N-bis (hydroxyethyl) octanoic acid amide, N, N-bis (hydroxyethyl) lauric acid amide, N, N-bis (hydroxyethyl) palmitic acid amide, N, N-bis (hydroxyethyl) Amide compounds derived from saturated fatty acids, such as stearamide, N, N-bis (hydroxyethyl) behenic acid amide,
2) Derived from unsaturated fatty acids such as N, N-bis (hydroxyethyl) palmioleamide, N, N-bis (hydroxyethyl) oleamide, N, N-bis (hydroxyethyl) erucamide Among these, N, N-bis (hydroxyethyl) stearic acid amide and N, N-bis (hydroxyethyl) behenic acid amide are particularly preferred.

The additive A used in the present invention is a mixture of the above-described polyhydric alcohol fatty acid ester and the amide compound represented by the formula 1, wherein the polyhydric alcohol fatty acid ester / the amide compound = 80/20 to 20/80 ( (Weight ratio), preferably 60/40 to 40/60 (weight ratio).

The additive B used in the present invention is an organic crosslinked spherical particle. Such organic crosslinked spherical particles include crosslinked silicone spherical particles, crosslinked polyamide spherical particles, crosslinked polytriazine spherical particles, crosslinked polyacrylic spherical particles, crosslinked polystyrene spherical particles, and these can be used alone or in combination. In the present invention, the average particle size of the organic cross-linked spherical particles used as the additive B is not particularly limited, but the average particle system is preferably 1 to 10 μm, particularly preferably 1 to 5 μm. The present invention also provides
The ratio of the minor axis to the major axis of the organic cross-linked spherical particles is not particularly limited, but the ratio of the minor axis to the major axis is preferably from 0.7 to 1, and particularly preferably from 0.8 to 1. Further, in the present invention, the refractive index of the organic crosslinked spherical particles is not particularly limited, but the refractive index is preferably from 1.45 to 1.55, particularly preferably from 1.48 to 1.52. Among the organic crosslinked spherical particles used as the additive B, the average particle diameter is 1 to 10 μm, the ratio of the minor axis to the major axis is 0.7 to 1, and the refractive index is 1.45 to 1.55. Is most preferred. Specific examples of such crosslinked polyacrylic spherical particles include spherical particles composed of a copolymer of methyl methacrylate and trimethylolpropane trimethacrylate, and spherical particles composed of a copolymer of butyl methacrylate and styrene-4-vinylstyrene. Particles, spherical particles composed of a copolymer of methyl methacrylate and ethylene glycol dimethacrylate, spherical particles composed of a copolymer of methyl acrylate and trimethylolpropane trimethacrylate, methyl acrylate, styrene and trimethacrylic acid Spherical particles composed of a copolymer of trimethylolpropane and spherical particles composed of a copolymer of methyl acrylate and ethylene glycol dimethacrylate are exemplified.

The additives C used in the present invention include: 1) palmitic amide, palmito oleic amide, stearic amide, oleic amide, behenic amide;
Fatty acid amides having 16 to 22 carbon atoms in the acyl group, such as erucamide, 2) N-methylstearic amide, N-stearylcaprylic amide, N-stearyllauric amide, N-stearylstearic amide; An acyl group having 16 to 22 carbon atoms, such as N-stearyl behenic acid amide, N-butyl erucic acid amide, N-octyl erucic acid amide, N-lauryl erucic acid amide, etc.
And N-alkyl-substituted fatty acid amides having an alkyl group having 1 to 18 carbon atoms, 3) bis-acyl groups having 16 to 22 carbon atoms, such as ethylenebisoleic acid amide and hexamethylenebisoleic acid amide Fatty acid amides and the like can be mentioned, and these can be used alone or in combination. Among them, unsaturated fatty acid amides having 16 to 18 carbon atoms in an acyl group, such as palmito oleic amide and oleic amide, are preferable. .

The polypropylene-based polymer composition of the present invention comprises the above-described polypropylene-based polymer, additive A, additive B and additive C, and is contained in 100 parts by weight of the polypropylene-based polymer. On the other hand, 0.3 to 1 part by weight of additive A, preferably 0.4 to 0.8 part by weight,
0.2 to 0.6 parts by weight of additive B, preferably 0.3 to 0.6 parts by weight
0.5 parts by weight and 0.01 to 0.1 parts by weight of additive C,
Preferably, it comprises 0.02 to 0.08 parts by weight.

The present invention does not particularly limit the method for preparing the polypropylene polymer composition of the present invention.
A known method can be applied to this. For example, 1) a polypropylene-based polymer, an additive A, an additive B, and an additive C are put into a mixer such as a tumbler blender or a Henschel mixer, mixed, and after mixing, further mixed with a single screw extruder or a multi-screw. The mixture is melt-kneaded and granulated by an extruder such as an extruder, and an additive A,
A method in which a master pellet containing additives B and C in a predetermined ratio at a high concentration is prepared, and the master pellet and the polypropylene polymer are melt-kneaded at a predetermined ratio to obtain a polypropylene polymer composition. 2) The polypropylene polymer, the additive A, the additive B and the additive C are put into a mixer such as a tumbler blender or a Henschel mixer, mixed, and after mixing, further melt-kneaded with a kneader, a Banbury mixer or the like. And a method of granulating into a polypropylene-based polymer composition.

The polypropylene polymer composition of the present invention is used for forming a polypropylene film by an inflation molding method. Known inflation molding methods can be used. This includes, for example, an air-cooled inflation molding method, an air-cooled two-stage inflation molding method, a water-cooled inflation molding method, and the like.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the polypropylene polymer composition of the present invention include the following 1) to 8). 1) The ethylene content is 4 mol% and the MFR is 7.0
g / 10 minutes and 100 parts by weight of a polypropylene polymer (P-1) having a density of 0.9 g / cm ³ , wherein glycerin monostearate / R in formula 1 is a stearoyl group, Amide compound when m and n are 1 =
Additive (A-1) consisting of 50/50 (weight ratio)
0.7 parts by weight, an average particle diameter of 4 μm, a ratio of minor axis to major axis of 0.90, and an additive comprising crosslinked polyacrylic spherical particles having a refractive index of 1.50 (B-1) ) 0.
Additive consisting of 3 parts by weight and oleic acid amide (C-
1) A polypropylene-based polymer composition containing 0.06 parts by weight and used in an inflation molding method.

2) The ethylene content is 3.5 mol%, the 1-butene content is 4.5 mol%, and the MFR is 8.
0 g / 10 min and 100 parts by weight of the polypropylene polymer (P-2) having a density of 0.9 g / cm ³ .
Additive (A-1) 0.5 part by weight, additive (B-1) 0.
A polypropylene polymer composition for use in an inflation molding method, which comprises 4 parts by weight and 0.04 part by weight of an additive (C-1).

3) A propylene homopolymer having an MF
R is 3.0 g / 10 min and the density is 0.9 g / cm ^3. 100 parts by weight of a polypropylene polymer (P-3), glyceryl monobehenate / R in formula 1 is a stearoyl group. Amide compound when m and n are 1 = 60/40 (weight ratio) additive (A
-2) 0.8 parts by weight, an average particle diameter of 2 μm, a ratio of a minor axis to a major axis of 0.85, and an additive comprising crosslinked polyacrylic spherical particles having a refractive index of 1.50 ( B-
2) A polypropylene polymer composition for use in an inflation molding method, containing 0.5 part by weight and 0.04 part by weight of an additive (C-1).

4) Polypropylene polymer (P-3) 1
Additive (A-1) 0.7 parts by weight, additive (B-1) 0.4 parts by weight, and palmitooleamide / oleamide = 20/80 (weight ratio) with respect to 00 parts by weight. A polypropylene polymer composition for use in an inflation molding method, comprising 0.04 parts by weight of an additive (C-2) consisting of a mixture of the above.

5) Polypropylene polymer (P-1) 1
Glycerin monobehenate / N, N
-Bis (hydroxyethyl) behenic acid amide = 40 /
0.5 parts by weight of an additive (A-3), 0.4 parts by weight of an additive (B-2), and an additive (C-
2) A polypropylene polymer composition containing 0.06 parts by weight and used in an inflation molding method.

6) Polypropylene polymer (P-1) 1
Glycerin monobehenate / N, N
-Bis (polyoxyethylene) stearamide = 3
Additive (A-4) having a ratio of 0/70 (weight ratio)
0.3 parts by weight, an average particle diameter of 2.5 μm, a ratio of the minor axis to the major axis of 0.85, and an additive composed of crosslinked silicone spherical particles having a refractive index of 1.40 (B- 3)
0.4 parts by weight and an additive consisting of erucamide (C
-3) A polypropylene-based polymer composition containing 0.04 parts by weight and used in an inflation molding method.

7) Polypropylene polymer (P-2) 1
The additive (A-2) was 0.5 part by weight, the average particle diameter was 1.8 μm, and the ratio of the minor axis to the major axis was 0.
Inflation molding method comprising 75 parts by weight of an additive (B-4) composed of crosslinked polystyrene spherical particles having a refractive index of 1.59 and 0.04 part by weight of the additive (C-1) A polypropylene-based polymer composition used for:

8) Polypropylene polymer (P-3) 1
0.9 parts by weight of additive (A-1), 0.4 parts by weight of additive (B-1), and additive (C-2) based on 00 parts by weight.
A polypropylene-based polymer composition containing 0.07 parts by weight and used in an inflation molding method.

The present invention will be described below in more detail with reference to examples and the like, but the present invention is not limited to these examples. In the following Examples and Comparative Examples, “parts” means “parts by weight” and “%” means “% by weight”.

[0033]

EXAMPLES Test Category 1 (Preparation of polypropylene-based polymer composition and production of polypropylene-based film by inflation molding method) Example 1 Ethylene content is 4 mol% and MFR is 7.0 g /
10 minutes, 100 parts of a polypropylene polymer (P-1) having a density of 0.9 g / cm ³ , glycerin monostearate / N, N-bis (hydroxyethyl) stearamide = 50/50 ( (A-1), a cross-linked polyacrylic sphere having an average particle diameter of 4 μm, a ratio of minor axis to major axis of 0.90, and a refractive index of 1.50. 4 parts of the particle (B-1) and 0.4 part of the additive (C-1) composed of oleic amide were charged into a Banbury mixer and kneaded at 230 ° C. to obtain a master pellet. 10 parts of the master pellet and 90 parts of the polypropylene polymer (P-1) were melt-kneaded by a single screw extruder and pelletized to prepare a polypropylene polymer composition (Example 1). The polypropylene polymer composition was supplied to an inflation molding machine (TKN-40 manufactured by Chubu Kagaku Kikai Seisakusho Co., Ltd.).
Inflation molding was performed under the condition of UR = 1.8 to produce a polypropylene film having a thickness of 30 μm.

Examples 2 to 8 and Comparative Examples 1 to 12 In the same manner as in Example 1, Examples 2 to 8 and Comparative Examples 1 to 1
The polypropylene-based polymer composition of No. 2 was prepared to prepare a polypropylene-based film. These contents, including Example 1, are summarized in Table 1.

Test Category 2 (Evaluation) Each of the polypropylene films produced in Test Category 1 was evaluated for smoothness, antifogging property, transparency and antiblocking property by the following methods. The results are summarized in Table 1.

Smoothness For each polypropylene-based film, a dynamic friction coefficient was measured according to ASTM-D-1894 using a friction measuring device TR type manufactured by Toyo Seiki Co., Ltd., and the measured values were evaluated according to the following criteria. Evaluation criteria A: 0.15 to 0.30 (excellent inflation moldability) O: 0.30 to 0.39 (excellent inflation moldability) Δ: 0.40 to 0.45 (inflation moldability) ×: 0.46 or more (inflation moldability is remarkably inferior and cannot be used practically)

Antifogging property 60 ml of water at 20 ° C. was placed in a 100 ml beaker, the mouth of the beaker was sealed with each polypropylene film, and left in a refrigerator at 5 ° C. for 1 hour. Evaluation was made according to the following criteria. Evaluation criteria ◎: No drop, excellent ○: Water droplets adhered to a very small part, but good △: Partially water droplets adhered, slightly poor ×: Fine water droplets Is adhered to the whole surface, is opaque and cannot be used

Transparency Each polypropylene-based film was measured using a direct-reading haze meter manufactured by Toyo Seiki Co., Ltd. at 20 ° C. and 65% RH in accordance with JIS-K6714, and the measured values were based on the following criteria. evaluated. Evaluation criteria ◎: less than 3.0% (excellent transparency) ３: 3.0% or more and less than 4.5% (excellent transparency,
△: 4.5% or more and less than 5.5% (transparency is slightly inferior and there is a problem) ×: 5.5% or more (transparency is extremely inferior and cannot be used practically)

Anti-blocking property Two films (5 cm × 8 cm) cut from each polypropylene-based film were overlapped so as to have an overlapping area of 25 cm ² , a load of 10 kg / 25 cm ² , a temperature of 40 ° C.,
After being left in an atmosphere of 60% RH for 24 hours, the force required for peeling at a tensile speed of 100 mm / min was measured using a tensile tester, and the measured value was evaluated according to the following criteria. Evaluation criteria ◎: less than 100 g (excellent antiblocking property) ○: 100 g or more and less than 300 g (good antiblocking property) Δ: 300 g or more and less than 800 g (poor antiblocking property) ×: 800 g or more ( (The anti-blocking property is extremely poor and cannot be used.)

[0040]

[Table 1]

In Table 1, P-1: a polypropylene polymer P-2 having an ethylene content of 4 mol%, an MFR of 7.0 g / 10 min, and a density of 0.9 g / cm ³ : Ethylene content is 3.5 mol%, 1-butene content is 4.5 mol%, and MFR is 8.0 g / 1.
0 minute, polypropylene-based polymer having a density of 0.9 g / cm ³ P-3: a propylene homopolymer having an MFR of 3.0
g / 10 minutes and a polypropylene polymer having a density of 0.9 g / cm ³

A-1: glyceryl monostearate /
Additive consisting of N, N-bis (hydroxyethyl) stearic acid amide = 50/50 (weight ratio) A-2: Glycerin monobehenate / N, N-bis (hydroxyethyl) stearic acidamide = 60/40 (weight) A-3: Glycerin monobehenate / N, N-bis (hydroxyethyl) behenamide = 40/60 (weight ratio) A-4: Glycerin monobehenate / N, N- Bis (polyoxyethylene) stearamide (m = n = 2)
= 30/70 (weight ratio) additive a-1: glycerin monostearate a-2: N, N-bis (hydroxyethyl) stearic acid a-3: glycerin monostearate / N, N-bis Additive consisting of (polyoxyethylene) stearylaminoether (repeating number of oxyethylene units: 10) = 50/50 (weight ratio)

B-1: Crosslinked polyacrylic spherical particles having an average particle diameter of 4 μm, a ratio of the minor axis to the major axis of 0.90, and a refractive index of 1.50 B-2: Average particle diameter Is 2 μm, the ratio of the minor axis to the major axis is 0.80, and the refractive index is 1.50. Crosslinked polyacrylic spherical particles B-3: the average particle diameter is 2.5 μm, and the minor axis is Crosslinked silicone spherical particles having a ratio of a major axis of 0.85 and a refractive index of 1.40 B-4: an average particle diameter of 1.8 μm, and a ratio of a minor axis to a major axis of 0.75 And crosslinked polystyrene spherical particles having a refractive index of 1.59 b-1: amorphous silica particles having a refractive index of 1.43

C-1: oleamide C-2: mixture of palmito oleamide / oleamide = 20/80 (weight ratio) C-3: erucamide

[0045]

As is apparent from the above description, the present invention described above provides a polypropylene film having excellent smoothness, antifogging property, transparency and anti-blocking property when a polypropylene film is formed by an inflation molding method. There is an effect that the property can be simultaneously provided.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat ゛ (Reference) B29K 23:00 B29L 7:00 F term (Reference) 4F071 AA20 AA22 AA32 AA54 AA65 AA69 AA78 AC05 AC12 AD06 AH04 BA01 BB06 BB09 BC01 4F210 AA11 AB19 AB23 AB24 AG01 QA01 QG02 QG18 QK12 4J002 BB121 BB141 BB151 BC072 BG052 EH046 EH056 EP017 EP018 FA082

Claims (4)

[Claims] 1. A polypropylene polymer composition for use in an inflation molding method comprising a polypropylene polymer, an additive A described below, an additive B described below, and an additive C described below, wherein the polypropylene polymer 100 0.3 to 1 part by weight of the additive A, 0.2 to 0.6 part by weight of the additive B and 0.01 to 0.1 part by weight of the additive C based on parts by weight.
A polypropylene-based polymer composition comprising 1 part by weight. Additive A: polyhydric alcohol fatty acid ester and the following formula 1
Wherein the polyhydric alcohol fatty acid ester / the amide compound = 80/20 to 20/80
(Weight ratio) (In the formula 1, R: an alkanoyl group having 8 to 22 carbon atoms or a alkanoyl group having 16 to 22 carbon atoms.
22 alkenoyl groups m, n: an integer of 1 to 4) Additive B: one or more selected from crosslinked silicone spherical particles, crosslinked polyamide spherical particles, crosslinked polytriazine spherical particles, crosslinked polyacrylic spherical particles, and crosslinked polystyrene spherical particles. Two or more organic crosslinked spherical particles Additive C: fatty acid amide having 16 to 22 carbon atoms in an acyl group, N having 16 to 22 carbon atoms in an acyl group and 1 to 18 carbon atoms in an alkyl group One or more fatty acid amides selected from alkyl-substituted fatty acid amides and bisfatty acid amides having 16 to 22 carbon atoms in the acyl group 2. The additive A, wherein the polyhydric alcohol fatty acid ester is an ester of a tri- or tetra-valent aliphatic alcohol having 3 to 6 carbon atoms and a saturated fatty acid having 18 to 22 carbon atoms, wherein the amide compound is The polypropylene polymer composition according to claim 1, wherein R in Formula 1 is an alkanoyl group of 16 to 22 and m and n are 1. 3. The additive B has an average particle size of 1 to 10 μm,
The ratio of the minor axis to the major axis is 0.7-1 and the refractive index is 1.45.
3. The polypropylene polymer composition according to claim 1, which is a crosslinked polyacrylic spherical particle of 1.55. 4. The additive C has an acyl group having 16 to 16 carbon atoms.
The polypropylene-based polymer composition according to claim 1, wherein the unsaturated fatty acid amide is 18.