JP3381427B2 - Olefin polymer composition container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] The present invention relates to an olefin polymer composition.
It relates to a container made. Specifically, water under pressure and heating conditions
Sterilization by steam or hot water (hot water), that is, retort sterilization
Whitening by processing (hereinafter abbreviated as retort processing)
Maintains excellent transparency without odor, good light
It has plenty of feeling and also has excellent transparency before retort processing.
The present invention relates to a container made of an olefin polymer composition having lightness.
You. [0002] 2. Description of the Related Art A container using a propylene polymer is rigid,
It has various excellent properties such as impact resistance and chemical resistance.
Surface and transparency before retort treatment
There is such a problem. Using propylene polymer
Many examples of containers can be given below.
You. Ethylene homopolymer (high density polyethylene) and ethylene
Consists of a ren copolymer (linear low-density polyethylene)
Using a composition (JP-A-60-124463)
Information). Set consisting of propylene polymer and ethylene polymer
Using a product (JP-A-63-162740;
Japanese Patent Publication No. Hei 3-766648;
Information) Using a copolymer of propylene and 3-methyl / 1-butene
(JP-A-3-14852). [0003] Propylene polymer is replaced by ethylene polymer (low density).
Polyethylene) to improve transparency before retort treatment.
(Japanese Patent Application Laid-Open No. 53-79939)
Gazette; JP-A-5-84877; JP-A-05-12
4092; JP-A-05-245911; JP-A-06-3
1796) and further, a nucleating agent (also called “nucleating
Agent)) (Japanese Patent Application Laid-Open No. 60-1)
No. 27336) and a propylene polymer having 6 or less carbon atoms.
Formulated with an α-olefin polymer having a branch at the 3-position above
(JP-A-3-163145) is known.
ing. In addition, the transparency and injection
The purpose of improving the moldability of the container molding by the injection molding method
Obtained by copolymerizing propylene and ethylene with
It is also known to use pyrene-ethylene copolymers.
You. Also, 3-methyl / 1-butene is added to the propylene polymer.
It is also known to use a composition containing a copolymer.
You. Composition of propylene polymer mixed with nucleating agent
The container molded from the material is transparent before retort treatment.
And excellent gloss, but when the nucleating agent is added,
Problems. (1) the crystallization of the composition is too fast
The range of molding conditions for the composition is reduced, and as a result,
Productivity decreases. (2) Extremely unpleasant odor during molding due to additives such as nucleating agents
This odor is generated in container applications.
I don't like it. Especially for pharmaceuticals and food containers
Reaches a level that can be put to practical use if the odor problem is not solved
I can't say that. According to the study of the present inventors, the transparency is excellent.
Propylene-ethylene copolymer and nucleating agent
(Also known as "nucleating agent")
After receiving the retort treatment, the container
They found that high transparency was lost. Special
Infusion containers for pharmaceuticals are retorted to sterilize the solution inside.
And the high transparency before retort processing is lost.
You. Here, retort treatment is a kind of pressure and heat sterilization treatment.
Above 100 ° C using a retort sterilizer
At temperature, pressurized steam (steam) or pressurized as heating medium
By treating for a certain time in a pressure cooker using hot water
The container and the contents of the container are sterilized. above
Loss of high transparency of the container before retorting
Is hot water (hot water) or water steam at high temperatures exceeding 100 ° C
Qi, that is, remarkably expressed when moisture coexists. Step
Propylene polymer (propylene homopolymer or propylene
・ Ethylene copolymer) with almost no odor
Achieving containers with excellent transparency before and after tolt processing
Have difficulty. [0006] SUMMARY OF THE INVENTION
Transparency, especially after retort treatment and before retort treatment
Excellent in properties, rigidity and heat resistance, without odor, good gloss
To provide a container made of an olefin composition
You. [0007] The present invention has the following configuration.
I do. (1) Propylene α-having a crystalline melting point of 110 to 145 ° C
Olefin copolymer [A] 81 to 99.2% by weight, density
Is 0.915 to 0.935 g / cm^Three, Crystal melting point is 10
0 ° C to 130 ° C and 190 ° C melt flow rate
0.5-30 g / 10 min ethylene polymer [B] 4
~ 0.3% by weight and the following [C1], [C2], [C
3], [C4] or [C5] from 15 to 0.5% by weight.
Olefin polymer using the olefin polymer composition [D]
Container made of united composition. Density 0.880-0.900 g /
cm^ThreeAnd ethylene having a crystal melting point of 110 to 115 ° C.
-Α-olefin copolymer [C1]. 0.910 density
~ 0.940 g / cm^ThreeAnd a crystal melting point of 100 to 130
° C, weight average molecular weight (Mw) 1000-15000
% Of ethylene polymer [C2]. Density 0.870-0.
900g / cm^ThreeAnd the crystal melting point is 110-160 ° C and
Weight average molecular weight (Mw) is 5,000 to 50,000
Propylene polymer [C3]. 0.860-0.8 density
75g / cm^ThreeAnd melt viscosity 200 to 10000 cp
s and amorphous propylene polymer [C4]. the above
Selected from [C1], [C2], [C3] or [C4]
An olefin polymer composition [C5] composed of two or more kinds. The following is a specific description. Used in the present invention
Is a propylene / α-olefin copolymer [A]
Propylene copolymer, ethylene propylene 1
-Butene copolymer and the like;
Α-olefin of the olefin copolymer [A]
Examples include len, 1-butene or 1-hexene.
You. Condensation of the propylene / α-olefin copolymer [A]
The crystal melting point (hereinafter sometimes abbreviated as Tm) is 110.
To 145 ° C, preferably 120 to 135 ° C.
You. Propylene-α whose crystal melting point greatly exceeds 145 ° C
-Containers using olefin copolymers should be
Lack of transparency, and propylene
Containers using α-olefin copolymer are rigid and heat-resistant
Lack. Here, the crystal melting point (Tm) refers to JIS K7
Measured according to the apparatus and method specified in 121
Temperature. The propylene / α-olefin copolymer
[A] melt flow rate at 230 ° C. (hereinafter M
It may be abbreviated as FR. ) Is an olefin polymer group
Moldability when molding olefin containers using synthetic products
From the viewpoint, 0.5 to 8 g / 10 min is preferable, and further preferable.
Or 1 to 5 g / 10 min. The propylene α-
The process for producing the olefin copolymer [A] is described in Ziggler-Na.
Coordination compound-based catalysts such as
Is solution polymerization or gas phase polymerization using a highly active catalyst such as a supported type
And the like. The ethylene polymer [B] used in the present invention
Has a density of 0.915 to 0.935 g / cm^Three, Crystal fusion
100 to 130 ° C and 190 ° C MFR 0.5 to 3
0 g / 10 min ethylene polymer, preferably
Density 0.918 to 0.925 g / cm^Three, Crystal melting point
120-130 ° C and 190 ° C MFR 1-15g / 1
0 min ethylene polymer. The ethylene polymer
The production method of [B] uses ethylene as a main monomer,
A group such as 1-butene or 1-hexene as a comonomer
One or more α-olefins selected from
A method of copolymerizing in the presence of a Natta catalyst or the like can be exemplified,
Furthermore, usually, linear low density polyethylene (Linear Low Density)
sity Polyethylene; L-LDPE)
Examples of low-density polyethylene known and public production methods
Can be shown. The olefin polymer composition used in the present invention
The content of the ethylene polymer [B] is 0.3 to 4% by weight.
Content is much less than 0.3% by weight or 4% by weight
Containers obtained using compositions that greatly exceed
Suitable for containers with excellent transparency before retorting
No. The ethylene / α-olefin used in the present invention
The copolymer [C1] has a density of 0.880 to 0.900 g /
cm^ThreeAnd a crystal melting point of 110 to 115 ° C.,
Preferably the density is 0.885 to 0.895 g / cm^Three,
Crystal melting point is 110-115 ° C and 190 ° C MFR is 0.1.
5 to 50 g / 10 min.
Very Low Density Polyetylene; V
-LDPE) ". The ethylene-α-ole
The method for producing the fin copolymer [C1] includes ethylene.
As a main monomer and 1-butene or 1 as a comonomer.
One or more α-olefins selected from the group consisting of
Copolymerization in the presence of a Ziegler-Natta catalyst
The method can be exemplified. Olefin polymer composition used in the present invention
Product [D] of the ethylene / α-olefin copolymer [C
1] is 0.5 to 15% by weight, preferably
It is 1 to 10% by weight, more preferably 1 to 6% by weight.
Content of the ethylene / α-olefin copolymer [C1]
Obtained with compositions that are well below 0.5% by weight
The container has excellent transparency after the intended retort treatment.
Not suitable for vessels and use a composition exceeding 15% by weight
The resulting container is transparent before the desired retort treatment.
Not suitable for containers with excellent properties. The ethylene polymer [C2] used in the present invention is
Density is 0.910 to 0.940 g / cm^Three, Crystal melting point
100-130 ° C and weight average molecular weight 1 by GPC method
000 to 15000, preferably having a density of
0.920 to 0.930 g / cm^Three, Crystal melting point is 110
~ 120 ° C and weight average molecular weight 3000 by GPC method
~ 7000, and those skilled in the art will refer to it as "PE-WAX".
It is called. Method for producing the ethylene polymer [C2]
Coordination compound catalysts such as Ziegler-Natta catalysts
Is used to polymerize ethylene alone or ethylene
With 1-butene or 1-hexene as the main monomer
Copolymerizing one or more α-olefins such as styrene
A method can be exemplified. Olefin polymer set used in the present invention
The content of the ethylene polymer [C2] in the product [D] is 0.1.
5 to 15% by weight, preferably 0.5 to 10% by weight
%, More preferably 1 to 3% by weight. The ethylene weight
Pairs whose content of coalesced [C2] is significantly lower than 0.5% by weight
The container obtained using the product is treated with the desired retort
Not suitable for containers with excellent transparency later, and 15% by weight
The container obtained with the composition exceeding
It is not suitable for containers with excellent transparency before retort treatment. The propylene polymer [C3] used in the present invention
Has a density of 0.870 to 0.900 g / cm^Three, Crystal melting point
Is 110-160 ° C and weight average molecular weight by GPC method
5000 to 50,000, preferably having a density of
0.880-0.890 g / cm^Three, Crystal melting point is 110
~ 140 ° C and weight average molecular weight 1000 by GPC method
0-50,000, and those skilled in the art can refer to "PP-WA
X ". The propylene polymer [C3]
Coordination of Ziegler-Natta catalyst
Using compound catalyst, propylene alone or propylene
With 1-butene or 1-hexene as the main monomer
Method for copolymerizing one or more α-olefins such as styrene
Can be exemplified. Olefin polymer composition used in the present invention
The content of the propylene polymer [C3] of [D] is 0.5
To 15% by weight, preferably 0.5 to 10% by weight,
More preferably, it is 1 to 6% by weight. The propylene polymerization
Composition whose content of body [C3] is significantly less than 0.5% by weight
The container obtained using the product is processed after the desired retort treatment.
Not suitable for containers with excellent transparency, and 15% by weight
Compositions that exceed the limits of moldability during container molding are not practical
It is no longer suitable. The propylene polymer [C4] used in the present invention
Has a density of 0.860-0.875 g / cm^Three, Melt viscosity
But 200 to 10000 cps and amorphous
The density is 0.860-0.875 g / cm^Three, Melt viscosity
With a degree of 300-9000 cps and amorphous,
Is amorphous polypropylene (APP) or amorphous polyolefin
This is called a fin (APO). The propylene weight
As a method for producing the coalesced [C4], propylene is used alone.
Polymerized or propylene as main monomer
Α-olefins such as 1-butene or 1-hexene
A method of copolymerizing one or more kinds can be exemplified. For use in the present invention
Propylene polymerization of olefin polymer composition [D]
The content of the body [C4] is 0.5 to 15% by weight,
Or 1 to 10% by weight, more preferably 2 to 6% by weight.
is there. When the content of the propylene polymer [C4] is 0.5
Containers obtained with compositions much less than
Suitable for containers with excellent transparency after retort treatment
And the composition greatly exceeding 15% by weight
Poor moldability makes it unsuitable for practical use. The olefin polymer composition used in the present invention
[C5] is an ethylene / α-olefin copolymer [C
1], ethylene polymer [C2], propylene polymer [C
3] and two kinds selected from propylene polymer [C4]
A set of the olefin polymer composition [C5]
The composition ratio is not particularly limited. I used in the present invention
The propylene polymer [C] of the fin polymer composition [D]
5] is 0.5 to 15% by weight. Olefin polymer composition used in the present invention
Product [D], usually added to the polyolefin composition
Antioxidant, weathering agent, UV absorber, antistatic agent, coloring
Agents, organic nucleating agents and inorganic nucleating agents or talc
Various known additives do not substantially impair the effects of the present invention.
It can be blended within the range. Further olefin polymers
Composition [D] contains isotactic polypropylene (P
(Ropylene homopolymer) or crystalline melting point exceeds 145 ° C
Copolymer consisting of propylene and α-olefin
It can be blended within a range that does not substantially impair the effects of the invention.
it can. Olefin polymer composition [D] used in the present invention
The above-mentioned polymers and compounding agents can be
In-shell mixer (product name), super mixer (product
Mixer with high-speed agitator, ribbon blender, tumbler
Mix and melt using a normal compounding device such as a color mixer.
If kneading is required, a conventional simple kneading means
Pelletizing using a twin-screw extruder or twin-screw extruder
Can also be exemplified. Melt kneading temperature is generally 180-30.
0 ° C., preferably 230-270 ° C. Production of the container made of the crystalline olefin resin of the present invention
The production method is a die using the olefin polymer composition [D].
Rec blow molding method, stretch blow (stretch blow) molding
Method, vacuum molding method, air pressure molding method, vacuum pressure molding method, etc.
Obtained by molding by the molding method of
Form a sheet using the compound or pellets,
By sealing the peripheral part of the sheet-like material into a bag-like material,
Can also be obtained. Here, direct blow
The molding method is to melt extrude a parison from an extruder and blow
Pariso between left and right molds (kept below 50 ° C)
In the parison with the
Blow compressed air (0.49 to 0.98 MPa) into the part
This is a molding method that expands to a predetermined shape. The stretch blow molding method refers to injection blow (a).
Injection blow), injection stretch blow, extrusion strain
Pitch blow, biaxial stretch blow, bottomed parison stretch
All molding methods called blow or two-stage blow
Included. Among these molding methods, the injection process is combined.
In the molding method, molten resin is first injected into a mold with a smooth surface.
To form a smooth parison (preform
And then inflate it with air.
This is a molding method for stretching. Alternatively, in the preform
Insert the rod, extend it in the vertical direction, and blow air.
Molding method of stretching in the horizontal direction by embedding
Can be Vacuum forming, pressure forming and vacuum pressure forming
Is molded to a thickness of 100 to 400 μm by T-die method etc.
The cut sheet is cut to the required dimensions and heated to a temperature near the melting point
External force to the semi-solid sheet near the solid state
It is shaped and cooled to make a container. As needed
A flange structure around the container
This is a molding method in which sheets are fused and used. Also the sheet
The bag-shaped material molding method by sealing the peripheral part of the material is the T-die method
A sheet formed to a thickness of 100 to 400 μm
Cut to required size
Is heat-sealed.
Fusing a polypropylene plug and trimming the surrounding area
This is a method of forming a container by packing. [0019] The present invention will be further described below with reference to Examples and Comparative Examples.
The present invention will be described in more detail with reference to these examples.
Not restricted. The following examples and comparative examples
The characteristics used in the above were evaluated by the following methods. (1) Crystal melting point (abbreviation “Tm”): JIS K7121
Measured based on. (Unit: ° C) (2) 230 ° C. MFR (abbreviation “MFR”): JIS
Test condition 14 of K7210 (1976) (230 ° C .; 2
1.18 N). (Unit: g / 10mi
n) (3) 190 ° C. MFR (abbreviation “MFR”): JIS
Test condition 14 of K7210 (1976) (190 ° C .; 2
1.18 N). (Unit: g / 10mi
n) (4) Transparency before retort treatment (abbreviation "Haze value
"): According to ASTM D1003,
Sample (wall thickness 0.5 mm) and measure the haze value.
Specified. The smaller the value, the better the transparency. (unit:
%) (5) Transparency after retort treatment (abbreviation "F
"): A container filled with water and sealed tightly
Retort treatment (120 ° C;
4min), and then sample from the center of the body of the container
(0.5mm thickness) and cut the haze value
It measured similarly to the transparency of (4). (unit:%) (6) Density: Specified in JIS K7112 (1980)
Measured based on method D (density gradient tube method) under specified test conditions
did. (Unit: g / cm^Three) (7) Weight average molecular weight: gel permeation chromatography
It was measured by graphy. (8) Melt viscosity: Test specified in JIS K6862
It measured based on method B of conditions (test temperature 190 degreeC).
(Unit: cps) (9) White feeling: the container is visually observed after the retort treatment.
Observe and confirm whiteness. ・ G: Whiteness of crystalline ethylene polymer was observed.
What can not be done. ・ N: Whiteness of crystalline ethylene polymer was observed.
Things. (10) Formability: Drawdown of parison and mold
Evaluated by their releasability. ・ G: Parison is small in direct blow molding
Only draw down, and the molded product is released when the blow mold is released.
When it is observed that it falls naturally. ・ N: If the parison cuts down drastically,
When the blow mold is released, the molded product does not fall naturally.
At least one is observed. (11) Odor: 10 containers molded at the same time
Ask the tester to confirm the odor, and make sure that all
Those that were judged to have a slight odor and no discomfort were rated G and
6 or more testers determined that the odor was unpleasant
Is N. The polymers used in Examples and Comparative Examples are described below.
And details of the composition. Az; ethylene content is 6.2% by weight, 1-butene content
3.5 wt%, MFR 3.3 g / 10 min,
Ethylene propylene 1-butene with a crystal melting point of 125 ° C
Copolymer. Ay: Ethylene content of 7.1% by weight, MFR of 4.
5 g / 10 min, ethylene melting point of 128 ° C
Lopylene copolymer. Ax; ethylene content 5.0% by weight, 1-butene content
4.5% by weight, MFR of 4.2 g / 10 min,
Ethylene propylene 1-bute with a crystal melting point of 126 ° C
Copolymer. Bz; density is 0.920 g / cm^Three, MFR is 8.0g
/ 10 min, crystal melting point 122 ° C., weight average molecular weight
55,000 ethylene / 1-butene copolymer. By; density 0.925 g / cm^Three, MFR 2.0g
/ 10 min, crystal melting point is 124 ° C., weight average molecular weight is
70,000 ethylene / 1-butene copolymer. C1z; density 0.890 g / cm^Three, MF
R is 10 g / 10 min and the crystal melting point is 113 ° C.
Tylene / 1-butene copolymer. C1y; density is 0.895 g / cm^Three, MFR is 10g
/ 10 min and ethylene · 1-
Butene copolymer. C1x; density 0.905 g / cm^Three, MFR is 10g
/ 10 min and ethylene • 1- having a crystal melting point of 117 ° C
Butene copolymer. C2z; density is 0.924 g / cm^Three, The weight average molecular weight is
5000 ethylene homopolymer (MFR 100 g /
10 min or more, measurement is not possible). C2y; density is 0.918 g / cm^Three, The weight average molecular weight is
7000 ethylene-propylene copolymer (MFR is
100 g / 10 min or more, measurement is not possible). C2x; density 0.935 g / cm^Three, The weight average molecular weight is
11,000 ethylene homopolymer (MFR 100 g
/ 10 min or more and cannot be measured). C2w; density is 0.931 g / cm^Three, The weight average molecular weight is
20,000 ethylene homopolymer (MFR 100 g
/ 10 min or more and cannot be measured). C3z; density 0.829 g / cm^Three,weight
A propylene homopolymer having an average molecular weight of 20,000. C3y; density 0.887 g / cm^Three, The weight average molecular weight is
40000 ethylene-propylene / 1-butene copolymer
body. C3x; density 0.899 g / cm^Three, The weight average molecular weight is
11,000 propylene homopolymer. C3w; density is 0.897 g / cm^Three, The weight average molecular weight is
300,000 propylene homopolymer. C4z; density 0.862 g / cm^Three, Melting
Amorphous with a viscosity of 1500 and a ring and ball method softening point of 152 ° C
Propylene / 1-butene copolymer. C4y; density is 0.864 g / cm^ThreeWith melt viscosity of 850
0, amorphous propylene unit having a softening point of 141 ° C.
German polymer. C4x; density 0.871 g / cm^ThreeWith a melt viscosity of 300
0, amorphous propylene monomer having a softening point of 110 ° C.
German polymer. C4w; density 0.894 g / cm^ThreeWith a melt viscosity of 110
Amorphous propylene having a ring and ball method softening point of 163 ° C.
Homopolymer. C5z; consisting of the above C1z, C2z, C3z and C4z;
The composition ratio is (C1z: C2z: C3z: C4z) = (1:
An olefin polymer composition which is 1: 1: 1). C5y; consisting of the above C1z, C3z and C4z, and its composition
The ratio is (C1z: C3z: C4z) = (1: 1: 1)
Olefin polymer composition. C5w; composed of the above C3z and C4z, and having a composition ratio of
Olefin polymer wherein (C3z: C4z) = (3: 1)
Composition. (Examples 1 to 7 and Comparative Examples 1 to 8)
Bz, By, C1z, C2z, C3z, C4z or nucleation
The agents were blended at a blending ratio shown in Table 1 below to obtain a composition.
To this, tetrakis [methylene (3,5
-Di {-tert-butyl-4-hydroxyhydrocinname
G)] 0.1 part by weight of methane and hydrotalcite [M
g_4.5Al_Two(OH)₁₃Co_Three・ 3.5H_TwoO] 0.05 weight
Parts, add a Henschel mixer (trade name)
The resulting mixture is charged into an extruder and melt mixed.
After kneading, a pellet was formed. Dump the pellets
Eject blow molding machine [Product name: Placo S-50NA]
(Manufactured by Placo)] into a 500 ml container.
Shaped (extrusion temperature 170-210 ° C and mold temperature 30 ° C
The average thickness of the body is 0.5 mm. Table 1 shows the characteristics of this container.
Shown in As is clear from Table 1, it is shown in Examples 1 to 7.
Further, the container of the present invention has a superior resin as compared with the containers of Comparative Examples 1 to 8.
It has transparency (haze) before and after the tolt processing. (Examples 8 to 14 and Comparative Examples 9 to 16)
y, Bz, By, C1z, C2z, C3z, C4z or
A nucleating agent was blended at a blending ratio shown in Table 2 below to form a composition.
Was. In addition to this, tetrakis [methylene
(3,5-di {-tert-butyl-4-hydroxyhydrosi
Nanamate)] 0.1 part by weight of methane and hydrotalsa
[Mg_4.5Al_Two(OH)₁₃Co_Three・ 3.5H_TwoO] 0.
Add 05 parts by weight to Henschel mixer (trade name)
Therefore, they are mixed uniformly, and the resulting mixture is charged into an extruder.
After melt-kneading, a pellet was obtained. This pellet
Direct blow molding machine [Product name: Placo S-
50NA (manufactured by Placor)] to obtain a volume of 500 ml.
Molded into a container (extrusion temperature 170-210 ° C and mold temperature
The average thickness of the body is 0.5 mm at a temperature of 30 ° C). Features of this container
The properties are shown in Table 2. As is clear from Table 2, Examples 8 to 1
The container of the present invention shown in FIG. 4 was compared with the containers of Comparative Examples 9 to 16.
With excellent transparency (haze) before and after retort treatment
I have. (Examples 15 to 20 and Comparative Examples 17 to 2)
0) After Ax, Bz, By, C1z, C1y or C1x
A composition was prepared by blending at the blending ratio shown in Table 3 above. to this
As an antioxidant, tetrakis [methylene (3,5-di)
-T-butyl-4-hydroxyhydrocinnamate)]
0.1 parts by weight of methane and hydrotalcite [Mg_4.5A
l_Two(OH)₁₃Co_Three・ 3.5H_TwoO] 0.05 parts by weight
And evenly mix with a Henschel mixer (trade name).
The obtained mixture was charged into an extruder and melt-kneaded.
Later, it was made into a pellet. Direct the pellets
Toblow molding machine [Product name: Placo S-50NA (Plastic
(Manufactured by Koso Co., Ltd.)] to form a container having a capacity of 500 ml.
(Body temperature at extrusion temperature 170-210 ° C and mold temperature 30 ° C)
Average thickness 0.5 mm). Table 3 shows the characteristics of this container.
You. As is clear from Table 3, it is shown in Examples 15 to 20.
The container of the present invention is superior to the containers of Comparative Examples 17 to 20.
Has transparency (haze) before and after retort treatment
You. (Examples 21 to 25 and Comparative Examples 17 and 1
8, 21, and 22) Ax, Bz, By, C2z, C2
y, C2x or C2w at the mixing ratio shown in Table 4 below.
The composition was combined. Tetrakis as an antioxidant
[Methylene (3,5-di {-tert-butyl-4-hydroxy)
Cihydrocinnamate)] 0.1 part by weight of methane and high
Drotal site [Mg_4.5Al_Two(OH)₁₃Co_Three・ 3.5
H_TwoO] 0.05 parts by weight and a Henschel mixer
(Trade name) and mix the resulting mixture.
After being charged into an output machine and melt-kneaded, pellets were formed.
The pellet-like material is directly blow-molded [product name:
Placo S-50NA (Placo)
Molded into 500 ml container (extrusion temperature 170-210
At a mold temperature of 30 ° C. and an average wall thickness of the body of 0.5 mm).
Table 4 shows the characteristics of the container. As is clear from Table 4,
The container of the present invention shown in Examples 21 to 25 is the same as Comparative Example 1.
Superior retort compared to containers 7, 18, 21 and 22
It has transparency (haze) before and after processing. (Examples 26 to 30 and Comparative Examples 17 and 1)
8, 23 and 24) Ax, Bz, By, C3z, C3
y, C3x or C3w at the mixing ratio shown in Table 5 below.
The composition was combined. Tetrakis as an antioxidant
[Methylene (3,5-di {-tert-butyl-4-hydroxy)
Cihydrocinnamate)] 0.1 part by weight of methane and high
Drotal site [Mg_4.5Al_Two(OH)₁₃Co_Three・ 3.5
H_TwoO] 0.05 parts by weight and a Henschel mixer
(Trade name) and mix the resulting mixture.
After being charged into an output machine and melt-kneaded, pellets were formed.
The pellet-like material is directly blow-molded [product name:
Placo S-50NA (Placo)
Molded into 500 ml container (extrusion temperature 170-210
At a mold temperature of 30 ° C. and an average wall thickness of the body of 0.5 mm).
Table 5 shows the characteristics of this container. As evident from Table 5,
The container of the present invention shown in Examples 26 to 30 is Comparative Example 1.
Superior retort compared to containers 7, 18, 23 and 24
It has transparency (haze) before and after processing. (Examples 31 to 35 and Comparative Examples 17 and 1
8, 25 and 26) Ax, Bz, By, C4z, C4
y, C4x or C4w at the mixing ratio shown in Table 6 below.
The composition was combined. Tetrakis as an antioxidant
[Methylene (3,5-di {-tert-butyl-4-hydroxy)
Cihydrocinnamate)] 0.1 part by weight of methane and high
Drotal site [Mg_4.5Al_Two(OH)₁₃Co_Three・ 3.5
H_TwoO] 0.05 parts by weight and a Henschel mixer
(Trade name) and mix the resulting mixture.
After being charged into an output machine and melt-kneaded, pellets were formed.
The pellet-like material is directly blow-molded [product name:
Placo S-50NA (Placo)
Molded into 500 ml container (extrusion temperature 170-210
At a mold temperature of 30 ° C. and an average wall thickness of the body of 0.5 mm).
Table 6 shows the characteristics of the container. As is clear from Table 6,
The container of the present invention shown in Examples 31 to 35 is Comparative Example 1
Superior retort compared to containers 7, 18, 25 and 26
It has transparency (haze) before and after processing. (Examples 36 to 38 and Comparative Example 17;
18) Ax, Bz, C5z, C5y or C5x is described later.
The composition was blended at the blending ratio shown in Table 7 to obtain a composition. Oxidation to this
As an inhibitor, tetrakis [methylene (3,5-di {-t)
-Butyl-4-hydroxyhydrocinnamate)] meta
0.1 parts by weight of hydrotalcite [Mg_4.5Al_Two
(OH)₁₃Co_Three・ 3.5H_TwoO] 0.05 parts by weight
Mix evenly with a Henschel mixer (trade name)
Then, the obtained mixture is charged into an extruder and melt-kneaded.
Into a pellet. Directly use this pellet
Blow molding machine [Product name: Placo S-50NA (Placo
-Made in a container having a capacity of 500 ml.
(Body temperature at extrusion temperature 170-210 ° C and mold temperature 30 ° C)
Average thickness 0.5 mm). Table 7 shows the characteristics of this container.
You. As is clear from Table 6, the results are shown in Examples 36 to 38.
Further, the container of the present invention is superior to the containers of Comparative Examples 17 and 18.
Transparency before and after retort treatment
You. [0033] The container made of the olefin polymer composition of the present invention.
Are compared to conventional olefin containers
It is effective. High transparency before retort treatment
There is no decrease in transparency after tolt treatment, and almost no odor
Pharmaceutical containers and foods that require cleanliness because they are not accompanied
Useful for containers, etc., and more specifically for infusion containers for pharmaceuticals
Extremely useful. [0034] [Table 1][0035] [Table 2][0036] [Table 3][0037] [Table 4][0038] [Table 5][0039] [Table 6][0040] [Table 7]

Continued on the front page (51) Int.Cl. ⁷ Identification code FI C08L 23:10)

Claims (1)

(57) Claims 1. A propylene / α-olefin copolymer [A] having a crystal melting point of 110 to 145 ° C, 81 to 99.2% by weight, and a density of 0.915 to 0.935 g / Cm ³ , a crystalline melting point of 100 ° C. to 130 ° C. and a 190 ° C. melt flow rate of 0.5 to 30 g / 10 min.
[C3], [C4] or [C5] A container made of an olefin polymer composition using an olefin polymer composition [D] comprising 15 to 0.5% by weight. Density 0.880-0.900
An ethylene / α-olefin copolymer [C1] having a g / cm ³ and a crystal melting point of 110 to 115 ° C. Density 0.9
10 to 0.940 g / cm ³ and crystal melting point of 100 to 1
30 ° C., weight average molecular weight (Mw) 1000-15000
% Of ethylene polymer [C2]. Density 0.870 ~
0.900 g / cm ³ and crystal melting point of 110 to 160 ° C
And a propylene polymer [C3] having a weight average molecular weight (Mw) of 5,000 to 50,000. 0.860 ~
0.875 g / cm ³ and melt viscosity 200-1000
Propylene polymer [C4] which is 0 cps and amorphous.
The olefin polymer composition [C] comprising two or more kinds selected from the above [C1], [C2], [C3] or [C4]
5].