JP2002060559A - Polyethylene resin for container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a polyethylene resin having excellent heat resistance, rigidity, moldability, stress-cracking resistance or the like so that the composition is applied to a container for a carbonized drink or the like. SOLUTION: This polyethylele resin for a container body or a cap satisfies the following requirements (a) to (d): (a) having 0.5-5 g/10 min MFR at 2.16 kg load; (b) having >=180 g/10 min HLMFR at 21.6 kg load; (c) having >=80 ratio of HLMFR/MFR: (d) >=2 ratio BH/BL of the number BH of short chain branches of a component corresponding to the molecular weight of 2×106-1×107 in eluted components of a high-temperature GPC, to the number BL of the short chain branches of the component corresponding to the molecular weight of 4×104-1.4×105. The polyethylene resin has a high fluidity and is excellent in moldability. As a result, the cycle is shortened and the production efficiency is heightened.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container for accommodating a liquid such as a carbonated beverage, that is, a polyethylene resin used for a container body and / or a lid thereof. It is excellent in impact resistance, slipperiness, food safety, and has stress crack resistance that can withstand the internal pressure of the container caused by the filling contents, and also has heat resistance that can withstand heat filling due to high rigidity. The present invention relates to a polyethylene resin for containers that can be filled even by various filling methods.

[0002]

2. Description of the Related Art Conventionally, as containers for soft drinks, carbonated drinks and the like, those made of polyethylene terephthalate (PET) as a container body and those made of aluminum metal as a lid (cap) have been widely used. . Normally, the lid is locked to the container mouth by locking means such as screwing. In recent years, application of polyolefin to lids has been studied from the viewpoint of environmental conservation such as recyclability. In addition, the use of polyolefin makes it possible to reduce the weight and cost, and has almost no odor or bleed-out, and is suitable as a container for food and drink. At that time, among the polyolefins, particularly as a cap for carbonated drinking water, polypropylene is often used because polyethylene may cause stress cracks due to the internal pressure of the container. In addition, in the case of heating and filling depending on contents such as drinking water, there is a possibility that the polyethylene is softened by heat of the heated contents. Therefore, polypropylene having high heat resistance and rigidity is used from such a point.

[0003]

However, in recent years, there has been an increasing demand for shortening the molding cycle and increasing the production efficiency. Therefore, attempts have been made to perform injection molding or compression molding with highly fluid polyolefin,
Since polyethylene has a lower melting point than polypropylene, it has been reviewed in that the molding cycle can be shortened. In addition, the lid made of polypropylene has poor slipperiness and increases the opening torque, but the lid made of polyethylene has an advantage that the slipperiness when opening and closing the cap is also good. However, as for the lid for a carbonated beverage container, as described above, there is a problem such as a stress crack in a polyethylene cap due to the pressure in the container. In addition, while the thickness of the cap is required to be reduced for economic reasons, higher rigidity is also required to prevent leakage of carbon dioxide gas from the seal due to deformation due to internal pressure. A container lid made of polyethylene resin that satisfies the above has not been realized yet.

[0004] As a polyethylene resin having improved stress crack resistance, impact resistance, and the like, there is known a polyethylene resin which is applied to containers, bottles, films and the like by blending two types of polyethylene, for example. However, none of these polyethylene resins satisfies both high fluidity, which can cope with high-speed molding, and rigidity, which can withstand the internal pressure of a carbonated beverage container, and is not used for a cap for carbonated beverages. In addition, a polyethylene resin which emphasizes fluidity when considering a molding cycle by a recent high-speed molding machine has poor stress crack resistance. In addition, even high-density polyethylene that emphasizes rigidity has poor stress crack resistance. For example, JP-A-58-103542
In the polyethylene resin described in Japanese Patent Application Laid-Open Publication No. H11-129, it is difficult to achieve high cycle molding and high rigidity while maintaining stress crack resistance. Therefore, at present, polyethylene resin is not used in the cap for carbonated beverages.

The present invention has been made to solve the above-mentioned problems, and has been made so as to be applicable to containers for carbonated drinks and the like.
An object of the present invention is to provide a polyethylene resin having a high degree of heat resistance, rigidity, moldability, stress crack resistance, and the like.

[0006]

Means for Solving the Problems The polyethylene resin for a container body or a lid according to the present invention satisfies the following requirements (a) to (d). . (A) MFR at a load of 2.16 kg is 0.5 to 5 g / 10
min (b) HLMFR at a load of 21.6 kg is 180 g / 1
0 min or more (c) HLMFR / MFR is 80 or more (d) The number of short-chain branches BH of the component corresponding to the molecular weight of 2 × 10 ⁶ to 1 × 10 ⁷ eluted by high-temperature GPC, and the molecular weight of 4 × 10 ^{4 to} 1.4 × 10 The ratio BH / BL of the component corresponding to ⁵ to the number of short-chain branches BL is 2 or more. Further, it is desirable to satisfy the following requirements (e) to (h). (E) The density is 0.955 g / cm ³ or more. (F) The flexural modulus of the injection molded sample is 13000 kgf /
In cm ² or more (g) of the injection molded samples耐定strain stress crack resistance over 40 hours (h) a capillary rheometer at 200 ° C. measurement, the melt viscosity at a shear rate of 200sec ^-1 4000poi
se or less. As the polyethylene resin, HLMFR is 0.1 to 0.1.
When the polyethylene resin (A) having a density of 2.0 g / 10 min and a density of 0.930 g / cm ³ or less is 10 wt% or more and less than 30 wt%, the MFR is 200 g / 10 min or more and the density is 0.960 g / cm ^3.
It is desirable that the content of the polyethylene resin (B) of cm ³ or more be more than 70% by weight and 90% by weight or less. A container body or a lid according to the present invention is made of the above polyethylene resin.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The polyethylene resin according to the present invention is ethylene alone or ethylene and an α-olefin having 3 to 18 carbon atoms which are polymerized by various catalysts such as a Ziegler catalyst; a Phillips catalyst; and a single site catalyst such as a metallocene catalyst. And a copolymer with one or more comonomers selected from the group consisting of: Representative examples of the α-olefin include, for example, propylene, 1-butene, 1-hexene, 1-octene, 4-methyl-1-pentene and the like.

(A) The polyethylene resin of the present invention must have an MFR of 0.5 to 5 g / 10 min under a load of 2.16 kg. Preferably, it is in the range of 1 to 4 g / 10 min. (B) HLMFR at a load of 21.6 kg is 18
It is necessary to be 0 g / 10min or more. The HLMFR is preferably between 200 and 380 g / 10 min. MFR is 0.
HLMFR is 180g / 1 even in the range of 5-5g / 10min
If it is less than 0 min, high-speed moldability is inferior. In addition, MFR is 5
If it exceeds g / 10min, the stress crack resistance is inferior even if the HLMFR is 180 g / 10min or more. MFR
If it is less than 0.5 g / 10 min, it is difficult to achieve an HLMFR of 180 g / 10 min or more, and naturally high speed moldability is inferior. (C) Further, the value of the ratio of HLMFR / MFR is 80 or more. When the ratio of HLMFR / MFR is 80 or more, the balance between high-speed moldability (fluidity) and stress crack resistance can be improved. HLMFR
The upper limit of the ratio of / MFR is not particularly limited. Usually 1
000 or less.

(D) In the polyethylene resin of the present invention, the number of short-chain branches BH of the component corresponding to the molecular weight of 2 × 10 ⁶ to 1 × 10 ⁷ , which is eluted by high-temperature GPC, and the molecular weight of 4 × 10 ^{4 to} 1.4 × 10 It is essential that the ratio BH / BL of the component corresponding to ⁵ to the number of short-chain branches BL is 2 or more. By setting BH / BL to 2 or more, high rigidity can be obtained, and the balance between rigidity and stress crack resistance can be improved. Short chain branching ratio BH / BL
Is not particularly limited. Usually, it is 100 or less. The ratio BH / BL of the number of short-chain branches can be determined as follows. That is, an "LC-Transform 320 type sampler" manufactured by Lab Connection is connected to the eluate outlet of high-temperature GPC ("Model PL-GPC220" manufactured by Polymer Laboratories). The measurement of high-temperature GPC was performed under the general conditions of polyethylene (column: PS gel, temperature: 140 ° C., sample: 10
２０20 mg / solvent 10 ml). The sample polyethylene was subjected to high-temperature GPC (solvent: ODCB (orthodichlorobenzene)), and the eluate from the sample polyethylene was collected by the above-mentioned sampler to obtain a diameter
Collect on a 60 mm germanium disk. By this operation, the polymer of the sample is separated and deposited on the outer peripheral portion of the disk according to the molecular weight. Next, the IR spectrum of the polymer at each position on the disk is measured using a dedicated attachment. At this time, since the position on the disk is determined by the elution time, the position where the desired molecular weight is deposited can be known using the calibration curve measured in advance. Therefore, a molecular weight of 2 × 10 ⁶ to 1 × 10 ⁷ and a molecular weight of 4
The position where x10 ^{4 to} 1.4 × 10 ⁵ are deposited is known, and the IR spectrum at that position is measured. Molecular weight 2 × 10 ⁶ 〜
The method of calculating BH and BL from the IR spectrum of a component corresponding to 1 × 10 ⁷ and a molecular weight of 4 × 10 ^{4 to} 1.4 × 10 ⁵ is as follows. In the IR spectrum with the vertical axis representing the absorbance, a baseline was first drawn to 3000-2750 cm ^-1 and 2925 cm
The area A2925 of the absorption peak in this range due to CH stretching vibration with ^-1 as the main peak is calculated. A2925 is proportional to the amount of polymer deposited. Then, from the absorption peak around 1340～1400Cm ^-1, with the exception of the peak of 1368cm ^-1 (corresponding to the vibration absorption of the methylene in the polymer backbone), (corresponding to the branch) peak of 1378 cm ^-1 only detected In order to perform the subtraction from the sample spectrum by multiplying the IR spectrum of the linear ethylene homopolymer of the reference sample separately measured by an appropriate coefficient and superimposing on the IR spectrum of the sample, the obtained difference spectrum of 1378 cm ⁻ The peak area A1378 of ¹ is calculated. A1378 is proportional to the amount of methyl groups at the short-chain branch ends in the deposited polymer. By calculating A1378 / A2925 and multiplying it by a coefficient obtained from a calibration curve measured in advance, the number of short-chain branches of the polymer can be known.

(E) It is desirable that the polyethylene resin of the present invention also satisfies the following requirements (e) to (h). That is, (e) the density is 0.95
5 g / cm ³ or more, it is desirable that preferably 0.957 g / cm ³ or more. The upper limit of the density is 0.9
It is preferably 80 g / cm ³ or less. 0.9 density
By making it 55 g / cm ³ or more, rigidity is improved,
The cap is less likely to deform due to the internal pressure of the container. Also,
Heat resistance to heat filling is also improved. (F) The polyethylene resin preferably has a flexural modulus of 13000 kgf / cm ² or more of a sample molded by injection molding. More desirably 14000 kgf / cm
² or more. When the flexural modulus is 13000 kgf / cm ² or more, the rigidity is high, and the cap is not easily deformed by the internal pressure of the container. The upper limit of the flexural modulus is not particularly limited. Usually, it is 20,000 kgf / cm ² or less.
The injection-molded sample for measuring the flexural modulus in the present invention is a specimen prepared by injection molding at 210 ° C. and measuring 6.4 × 12.4 × 127 mm, which is measured in accordance with JIS-K7203.

(G) The polyethylene resin preferably has a constant strain stress crack resistance (ESCR) of 40 hours or more. This is stress crack resistance under a constant strain, and specifically conforms to JIS-K6760. The injection molded sample was cut out from a plate having a size of 130 × 130 × 2 mm which was injection molded at 210 ° C. (H) The polyethylene resin has a melt viscosity at a shear rate of 200 sec ^-1 of 4000 poise or less, preferably 3500 poise when measured at 200 ° C. in a capillary rheometer.
It is desirable that: In the present invention, a capillary rheometer manufactured by Intesco Corporation is used, and the diameter is 1.0 m.
The viscosity at a shear rate of 200 sec ⁻¹ is measured at a temperature of 200 ° C. using a capillary with m, L / D = 20 and the melt viscosity described herein. This melt viscosity is 4000poise
By setting it as follows, short shots are less likely to occur and high-speed injection moldability is improved, and spreadability is improved, so that it is suitable for compression molding. Shear speed 200se
The lower limit of the melt viscosity of c- ¹ is not particularly limited. Normally,
More than 500poise.

The polyethylene resin of the present invention may be a single polyethylene resin, but may be constituted by a plurality of, for example, polyethylene resins having two kinds of physical properties. That is, the polyethylene resin as the component (A) described later is 10% by weight or more and less than 30% by weight, preferably 20% by weight or more and less than 30% by weight, and the polyethylene resin as the component (B) is more than 70% by weight. And up to 90% by weight, preferably more than 70% by weight and up to 80% by weight. Here, when the content of the polyethylene resin as the component (A) is 10% by weight or more, the stress crack resistance is improved, and when the content is less than 30% by weight, the moldability is improved. The polyethylene resin as the component (A) is a polyethylene resin having an HLMFR of 0.1 to 2 g / 10 min, preferably 0.2 to 1 g / 10 min, and a density of 0.930 g / cm ³ or less. Has an MFR of 200 g / 10 min or more and a density of 0.960.
g / cm ³ or more. Here, the HLMFR of the polyethylene resin as the component (A) is 0.1 g.
If it is less than / 10 min, the fluidity may be deteriorated, resulting in poor moldability. If it is more than 2.0 g / 10 min, the stress crack resistance may be deteriorated. Further, when the density of the polyethylene resin as the component (A) exceeds 0.930 g / cm ³ , the stress crack resistance may be deteriorated. The lower limit of the density of the polyethylene resin as the component (A) is not particularly limited. Usually, it is 0.880 g / cm ³ or more. MF of polyethylene resin as component (B)
When R is less than 200 g / 10 min, the fluidity deteriorates,
If the density is less than 0.960 g / cm ³ , the rigidity may decrease. MF of polyethylene resin as component (B)
The upper limit of R is not particularly limited. Normally 2000g / 10mi
n or less. The upper limit of the density of the polyethylene resin as the component (B) is not particularly limited. Normally, 0.9
It is 80 g / cm ³ or less.

The polyethylene resin of the present invention can be obtained by separately polymerizing the polyethylene resins of the component (A) and the component (B) and blending them. Preferably, a polymer obtained by sequentially and continuously polymerizing a plurality of polymerization reactors connected in series, for example, two polymerization reactors, for reasons such as resin uniformity is desirable. The polymerization catalyst includes various catalysts such as a Ziegler catalyst comprising the above-described transition metal catalyst component and an organoaluminum compound; a Phillips catalyst; a single-site catalyst such as a metallocene catalyst. The polymerization can be carried out in an organic solvent or in the gas phase. Here, a plurality of polymerization vessels connected in series sequentially and continuously polymerize,
In the so-called multi-stage polymerization, various methods can be specifically adopted. For example, in the first stage, ethylene or further α-olefin is (co) polymerized to produce a polyethylene resin as a base of a high molecular weight component, and then ethylene and hydrogen are introduced into a polymerization system, whereby a high molecular weight component and a low molecular weight And a method of preparing a polyethylene resin containing the components. However, it is not always easy to produce the polyethylene resin of the present invention by the above multistage polymerization. As a preferred method, the first polymerization zone is polymerized by employing the production conditions for producing a low molecular weight component, and the obtained resin is transferred to the next polymerization zone, and the high molecular weight component is produced in the next polymerization zone. A method of preparing a polyethylene resin by polymerization under the production conditions is preferred. The production conditions are set so that the density of the resin produced in the subsequent polymerization zone becomes low. That is, the supply amount of the α-olefin and the like are adjusted between the stages so that the copolymerization occurs in the polymerization zone after the initial polymerization zone. More specifically, when polymerizing in multiple stages using a Ziegler-based catalyst using a titanium-based catalyst component and an organoaluminum compound, in the first polymerization zone (the first stage of the two-stage polymerization), ethylene and hydrogen are introduced to introduce a Ziegler catalyst. A high-density polyethylene resin with a high MFR is continuously produced by polymerization, and the polymer extracted from the first polymerization zone is appropriately depressurized with hydrogen, and subsequently, the subsequent polymerization zone ( This is a method of carrying out polymerization in the subsequent polymerization zone by introducing ethylene and an α-olefin to produce low-density polyethylene with low HLMFR.

Additives, fillers and the like may be added to the polyethylene resin of the present invention as long as the effects of the present invention are not significantly impaired. As the additives, for example, one or two or more of antioxidants (phenol-based, phosphorus-based, sulfur-based), lubricants, antistatic agents, light stabilizers, ultraviolet absorbers, and the like can be appropriately used. As the filler, for example, talc,
Mica and the like can be used. As described above, the resin can be a polyethylene resin obtained by continuously polymerizing in a multistage polymerization, and it is particularly preferable to polymerize the component (A) after polymerizing the component (B) first. . In the case of multi-stage polymerization, the amount of polyethylene produced in the polymerization zone of the second and subsequent stages and its physical properties are determined based on the amount of resin produced in each stage (unreacted gas analysis, which can be grasped by other analysis means). The physical properties of the resin can be determined by measuring the physical properties of the resin extracted after each step and converting the properties from the additive properties of the resin. Of course, it is also possible to polymerize them separately and then blend them. In each case, various additives can be blended as required and kneaded with a kneading extruder, a Banbury mixer, or the like to easily form a molding material.

The polyethylene resin according to the present invention is used for a container body or a lid of a container, and is particularly suitable for application to a lid. In particular, it is preferably applied to a container body or a lid of a container in which internal pressure is applied to the inside of a container such as a carbonated beverage or a container in which contents such as a water beverage need to be heated and filled, and particularly to a lid of such a container. The method of forming the lid is not particularly limited, and various well-known resin molding methods can be applied. However, among them, injection molding, compression molding and the like are most preferably used. When the lid is made of the polyethylene resin of the present invention, the resin of the container body can be made of any resin. For example, a resin such as PET or polypropylene can be employed. Of course, the polyethylene resin of the present invention can be used depending on the contents of the container. The container body or lid to which the present invention is applied may be any one that is generally used as a resin container. Among them, the effects are remarkable when used for beverages, particularly for carbonated beverage containers.

[0016]

EXAMPLES The methods for measuring the physical properties of polyethylene resins in the following Examples and Comparative Examples are as follows. -MFR: JIS-K6760-Density: JIS-K6760-Flexural modulus: JIS-K7203-Constant strain stress cracking (ESCR): JIS-
K6760-Melt viscosity: 20 using a capillary rheometer (manufactured by Intesco) and a capillary having a diameter of 1.0 mm and L / D = 20.
The viscosity was measured at a temperature of 0 ° C., and the viscosity at a shear rate of 200 sec ⁻¹ was measured, and this was defined as the melt viscosity. -Vicat softening point: JIS-K6760 If the temperature is 125 ° C or higher, it can be determined that the container has good heat resistance. Moldability: The lid was injection molded at high speed, and the high speed moldability was evaluated. Good moldability was indicated by ○, and poor moldability was indicated by ×. Injection molding sample preparation conditions: Molding machine; FANUC 100B manufactured by FANUC Molding temperature: 230 ° C Injection speed: 35 mm / sec Holding pressure: 400 kg / cm ² Cooling temperature; 40 ° C Cooling time: 20 sec , Add a carbonated beverage, and close with a cap molded of polyethylene resin as in each example.
After being left at 0 ° C. for one month, the presence or absence of cracks in the cap was examined.

[Example 1] As shown in Table 1, component (B) was polymerized as shown in Table 1 by continuous two-stage polymerization using butene-1 as a comonomer using a Ziegler catalyst, followed by polymerization of component (B). A) was polymerized to obtain a resin. The measured values are also shown together with the compounding ratio, MFR and HLMFR of the resin. In the first stage, only ethylene was supplied as a monomer, and in the second stage, ethylene and butene-1 were supplied as monomers to perform polymerization. The amount (combination ratio) of the polyethylene resin of the component (A) produced in the second stage, its physical properties, and the like are determined from the unreacted gas analysis after each stage, and the production amount of each stage is obtained. The physical properties of the resin obtained after and after the second stage were measured, respectively, and were calculated from the additivity. The polyethylene resin of Example 1 had a high short-chain branching ratio BH / BL of 2.5, which was high. As shown in Table 1, the other physical properties were good in all of the flexural modulus, impact strength, stress crack resistance, heat resistance, moldability and sustained pressure resistance. Further, a lid having a screwed surface inside was formed by compression molding by a conventional method. That is, a strand was extruded from a resin extruder, cut, thrown into a mold, and compressed by a compression molding machine to form a lid. Molding could be performed easily. Further, the resin was injected into the mold by an injection molding machine by a conventional method, and a lid having a screw surface inside was formed. This molding was also easily performed. [Examples 2 and 3] The same procedure as in Example 1 was carried out using each component and comonomer shown in Table 1. As shown in Table 1, the flexural modulus, impact strength, stress crack resistance, heat resistance, moldability, and sustained pressure resistance were all good.

Comparative Example 1 Polymerization was carried out using the continuous two-stage polymerization apparatus of Example 1. However, in the first stage, ethylene and butene-1 are copolymerized to produce polyethylene as a base of the high molecular weight component, and then in the second stage, ethylene and hydrogen are introduced into the polymerization system, and the high molecular weight component and the low molecular weight component are mixed. Was produced. The short chain branching ratio BH / BL of this resin was as low as 1.6. Other physical properties are as shown in Table 2. Using this polyethylene resin, tests such as moldability were conducted in the same manner as in Example 1. As a result, the flexural modulus and heat resistance were poor. [Comparative Example 2] The MFR comprising only the component (A) was large,
A test was conducted in the same manner as in Example 1 using a polyethylene resin having a small HLMFR / MFR and a small ratio of short chain branches BH / BL. Stress crack resistance and continuous pressure resistance were poor. Comparative Example 3 The weights of the components (A) and (B) shown in Table 2 were measured and uniformly mixed with a Henschel mixer, and then melt-mixed with an extruder to produce pellets. The ratio BH / BL of the number of short-chain branches of the resin was as low as 1.1. As a result of a test performed in the same manner as in Example 1, the flexural modulus, stress crack resistance, heat resistance, and continuous pressure resistance were poor. Comparative Example 4 A test was performed in the same manner as in Example 1 using a polyethylene resin having a small HLMFR and a small HLMFR / MFR. The flexural modulus, stress crack resistance, heat resistance, moldability, and sustained pressure resistance were poor.

[0019]

[Table 1]

[0020]

[Table 2]

[0021]

The polyethylene resin of the present invention has high fluidity and excellent moldability, can shorten the cycle, and can increase production efficiency. In addition, it has an excellent balance of stress crack resistance, rigidity and impact resistance, and has heat resistance enough to withstand heat filling due to high rigidity, and can be used in all filling methods regardless of filling method It can also be used for containers that contain contents whose internal pressure is high due to carbonated beverages or the like. Moreover, there is almost no smell or bleed-out,
Compatible with food and beverage containers. Therefore, it is suitable for containers for carbonated beverages and beers, especially for lids thereof. In addition, it is excellent in recyclability, good in environmental suitability, lightweight, inexpensive, has good sliding properties without using a lubricant, and is easy to use.

 ────────────────────────────────────────────────── ─── Continued on the front page F term (reference) 3E033 BA15 CA03 CA06 CA07 CA20 FA02 GA02 3E084 CC04 DC04 4J002 BB031 BB032 BB051 BB052 GG01 4J100 AA02P AA04Q CA01 CA04 DA11 DA39 DA43 FA34 JA58

Claims (4)

[Claims] 1. A polyethylene resin for a container body or a lid satisfying the following requirements (a) to (d). (A) MFR at a load of 2.16 kg is 0.5 to 5 g / 10
min (b) HLMFR at a load of 21.6 kg is 180 g / 1
0 min or more (c) HLMFR / MFR is 80 or more (d) The number of short-chain branches BH of the component corresponding to the molecular weight of 2 × 10 ⁶ to 1 × 10 ⁷ eluted by high-temperature GPC, and the molecular weight of 4 × 10 ^{4 to} 1.4 × 10 The ratio BH / BL of the component corresponding to ⁵ to the number of short-chain branches BL is 2 or more. 2. The polyethylene resin for a container body or a lid according to claim 1, further satisfying the following requirements (e) to (h). (E) The density is 0.955 g / cm ³ or more. (F) The flexural modulus of the injection molded sample is 13000 kgf /
In cm ² or more (g) of the injection molded samples耐定strain stress crack resistance over 40 hours (h) a capillary rheometer at 200 ° C. measurement, the melt viscosity at a shear rate of 200sec ^-1 4000poi
se or less. ^3. A polyethylene resin (A) having an HLMFR of 0.1 to 2.0 g / 10 min and a density of 0.930 g / cm ³ or less.
10% by weight or more and less than 30% by weight, MFR is 200 g / 10 min or more, density is 0.960 g / cm.
The polyethylene resin for a container body or a lid according to claim 1 or 2, wherein the polyethylene resin (B) has more than ³ % by weight and more than 70% by weight and 90% by weight or less. 4. A container body or lid made of the polyethylene resin according to claim 1.