JP2018197120A - Container for agricultural chemicals - Google Patents

Container for agricultural chemicals Download PDF

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JP2018197120A
JP2018197120A JP2017102529A JP2017102529A JP2018197120A JP 2018197120 A JP2018197120 A JP 2018197120A JP 2017102529 A JP2017102529 A JP 2017102529A JP 2017102529 A JP2017102529 A JP 2017102529A JP 2018197120 A JP2018197120 A JP 2018197120A
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ethylene
container
resin composition
mouth
load
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JP6978857B2 (en
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保雄 舩原
Yasuo Funahara
保雄 舩原
尚行 矢崎
Naoyuki Yazaki
尚行 矢崎
厚広 八谷
Atsuhiro Yatani
厚広 八谷
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Prime Polymer Co Ltd
Yazaki Corp
Hokusan Co Ltd
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Prime Polymer Co Ltd
Yazaki Corp
Hokusan Co Ltd
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Abstract

To provide a container for agricultural chemicals made of polyethylene which has a layer made of ethylene resin, and is excellent in falling strength, especially falling strength at the time that a mouth portion where concentration of stress happens easily is directed downward.SOLUTION: A container for agricultural chemicals includes: a body which has a capacity of 5-30 L and includes a mouth portion (1) with a diameter (A) of 30-60 mm and a holding portion (2) the root of which is on the same face as the mouth portion, in which a distance (B) from an inscribed edge (3) of the side near the mouth portion (1) of an opening of the holding portion (2) to a mouth portion end is 20 mm or more, the body having a concave (5) between the holding portion (2) and the mouth portion (1), the concave being recessed like a circular arc and having a depth (C) from a root (4) of the holding portion (2) of 30-50 mm; and a cap (6) screwed with the mouth portion. An outer layer using a specific ethylene resin composition (X) is formed to the body, and a specific ethylene resin composition (Y) is used to the cap.SELECTED DRAWING: Figure 1

Description

本発明は、農薬原液を収納する樹脂製の農薬用容器に関する。   The present invention relates to a resinous agrochemical container for storing a pesticide stock solution.

農薬の容器はガラス瓶又は金属缶からプラスチック製に置き換わり、高密度ポリエチレン層とガスバリア性が高い樹脂からなる層とを有する多層中空成形容器が多く使用されている(特許文献1,2)。内容物である農薬は毒性が強いことから、容器の運搬、保存中の落下に伴い発生する容器の割れによる内容物の漏洩が生じてはならない。   A container for an agrochemical is replaced with a plastic from a glass bottle or a metal can, and a multilayer hollow molded container having a high-density polyethylene layer and a layer made of a resin having a high gas barrier property is often used (Patent Documents 1 and 2). The contents of agricultural chemicals are highly toxic, so the contents should not leak due to container breakage that occurs when containers are transported and dropped during storage.

耐衝撃性に優れ、農薬用容器として好適なポリエチレン製中空プラスチック成形品が開示されている(特許文献3)。しかし、落下強度については、なんら開示されていない。また特許文献3で使用のクロム触媒を用いて重合したポリエチレンは、長鎖分岐が存在するため、チーグラー・ナッタ触媒やメタロセン触媒を用いて重合したポリエチレンと比較して機械強度に劣ることが知られている(特許文献4)。   A polyethylene hollow plastic molded article having excellent impact resistance and suitable as a container for agricultural chemicals is disclosed (Patent Document 3). However, there is no disclosure about the drop strength. In addition, polyethylene polymerized using the chromium catalyst used in Patent Document 3 is known to be inferior in mechanical strength compared to polyethylene polymerized using a Ziegler-Natta catalyst or a metallocene catalyst because of the presence of long chain branching. (Patent Document 4).

一方、薬品浸漬後の落下強度が改善されたエチレン系重合体からなるブロー成形品が開示されている(特許文献5)が、長鎖分岐が存在するため、機械強度が十分ではないと推察できる。落下強度に優れる中空成形体用ポリエチレン系樹脂が開示されている(特許文献6)が、落下強度と中空成形容器の形状との関係については、何ら言及されていない。落下強度も必ずしも十分に高いレベルであるとは言えない。   On the other hand, a blow molded article made of an ethylene polymer with improved drop strength after chemical immersion has been disclosed (Patent Document 5), but it can be inferred that the mechanical strength is not sufficient due to the presence of long-chain branching. . A polyethylene resin for hollow molded articles having excellent drop strength is disclosed (Patent Document 6), but nothing is mentioned about the relationship between the drop strength and the shape of the hollow molded container. The drop strength is not necessarily at a sufficiently high level.

こうした状況下に、落下強度、特に応力集中が起こりやすい口部を下にした際の落下強度に優れたポリエチレン製農薬用容器が望まれていた。   Under these circumstances, there has been a demand for a polyethylene agrochemical container that has excellent drop strength, particularly drop strength when the mouth portion where stress concentration easily occurs is lowered.

特開2000−229665号公報JP 2000-229665 A 特開2004−299737号公報JP 2004-299737 A 特開2013−203915号公報JP2013-203915A 特開2004−269864号公報JP 2004-269864 A 特開2012−126862号公報JP 2012-126862 A 特開2003−292534号公報JP 2003-292534 A

かかる状況の下、本発明が解決しようとする課題は、エチレン系樹脂からなる層を有し、落下強度、特に応力集中が起こりやすい口部を下にした際の落下強度に優れたポリエチレン製農薬用容器を提供することにある。   Under such circumstances, the problem to be solved by the present invention is a polyethylene pesticide having a layer made of an ethylene-based resin and having excellent drop strength, particularly drop strength when the mouth portion where stress concentration is likely to occur is down. It is to provide a container for use.

本発明者らは、上記課題を解決するために鋭意研究を重ねた結果、特定の分子構造を有するポリエチレンを用いて、口部周辺の形状、並びに容器の口部に特定のキャップで栓をすることで、応力集中しやすい口部を下にした時の落下強度に優れる農薬用容器が得られることを見出し、本発明をなすに至った。   As a result of intensive studies to solve the above problems, the present inventors use polyethylene having a specific molecular structure to plug the shape around the mouth and the mouth of the container with a specific cap. Thus, the present inventors have found that an agrochemical container having excellent drop strength when the mouth portion where stress is likely to concentrate is placed down is obtained, and the present invention has been made.

すなわち、本発明の一態様によれば、
容量が5〜30Lであり、直径(A)が30〜60mmの口部(1)と、付け根が前記口部と同じ面にある把持部(2)とを有し、前記把持部(2)開口の口部(1)に近い側の内接辺(3)から口部端までの距離(B)が20mm以上であり、前記把持部(2)と前記口部(1)との間に、前記把持部(2)の付け根(4)から深さ(C)が30〜50mmの円弧状に窪んだくぼみ(5)を有する本体と、
前記口部に螺合するキャップ(6)を備える、農薬用容器であって、
前記本体が、下記のエチレン系樹脂組成物(X)を用いて成形した外層を少なくとも有し、前記キャップの外蓋が下記のエチレン樹脂組成物(Y)を用いて成形されたものである農薬用容器:
エチレン系樹脂組成物(X):下記要件(i)〜(iv)を満たし、エチレンと炭素数6〜8のα−オレフィンとの共重合体(X1)をエチレン系樹脂成分の65〜100質量%含み、該エチレン系樹脂組成物(X)は、下記要件(v)〜(vii)の要件を満たす。
(i)190℃、2.16kg荷重におけるメルトフローレート(MFR2(g/10分))が0.02〜0.20、
(ii)190℃、21.6kg荷重におけるメルトフローレート(MFR21(g/10分)が5〜20、
(iii)JIS K6922−2に準拠して測定した密度(kg/m)が954〜960、
(iv)GPCによる分子量が10,000以下の成分量が10質量%未満;
(v)190℃、2.16kg荷重におけるメルトフローレート(MFR2(g/10分))が0.02〜0.20
(vi)190℃、21.6kg荷重におけるメルトフローレート(MFR21(g/10分)が5〜20
(vii)JIS K6922−2に準拠して測定した密度(kg/m)が954〜960。
エチレン樹脂組成物(Y):下記要件(viii)及び(ix)を満たす。
(viii)190℃、2.16kg荷重におけるMFR(g/10分)が0.02〜0.20、
(ix)JIS K6922−2に準拠して測定した密度(kg/m)が945〜955。
That is, according to one aspect of the present invention,
It has a mouth part (1) having a capacity of 5 to 30 L and a diameter (A) of 30 to 60 mm, and a grip part (2) whose root is on the same surface as the mouth part, and the grip part (2) The distance (B) from the inscribed side (3) on the side close to the mouth (1) of the opening to the mouth end is 20 mm or more, and between the grip (2) and the mouth (1) A body having a depression (5) recessed in an arc shape having a depth (C) of 30 to 50 mm from the base (4) of the gripping part (2);
A pesticide container comprising a cap (6) screwed into the mouth,
The agrochemical in which the main body has at least an outer layer molded using the following ethylene-based resin composition (X), and the outer lid of the cap is molded using the following ethylene resin composition (Y) Container for:
Ethylene-based resin composition (X): The following requirements (i) to (iv) are satisfied, and a copolymer (X1) of ethylene and an α-olefin having 6 to 8 carbon atoms is 65 to 100 mass of an ethylene-based resin component. %, The ethylene-based resin composition (X) satisfies the following requirements (v) to (vii).
(I) A melt flow rate (MFR2 (g / 10 min)) at 190 ° C. and a load of 2.16 kg is 0.02 to 0.20,
(Ii) 190 ° C., melt flow rate at 21.6 kg load (MFR21 (g / 10 min) is 5 to 20,
(Iii) Density (kg / m 3 ) measured in accordance with JIS K6922-2 is 954-960,
(Iv) The amount of a component having a molecular weight of 10,000 or less by GPC is less than 10% by mass;
(V) Melt flow rate (MFR2 (g / 10 min)) at 190 ° C. and a load of 2.16 kg is 0.02 to 0.20.
(Vi) Melt flow rate (MFR21 (g / 10 min) is 5 to 20 at 190 ° C. and 21.6 kg load)
(Vii) The density (kg / m 3 ) measured according to JIS K6922-2 is 954 to 960.
Ethylene resin composition (Y): The following requirements (viii) and (ix) are satisfied.
(Viii) 190 ° C., MFR (g / 10 min) at a load of 2.16 kg is 0.02 to 0.20,
(Ix) The density (kg / m 3 ) measured according to JIS K6922-2 is 945 to 955.

本発明の濃薬用容器は、応力集中が起こりやすい口部を下にした際の落下強度に優れた容器である。   The thickener container of the present invention is a container having excellent drop strength when the mouth portion where stress concentration is likely to occur is faced down.

本発明に係る容器の一形態を示す図である。It is a figure which shows one form of the container which concerns on this invention.

以下本発明を、その好ましい実施形態に基づき図面を参照しながら説明する。
図1は、本発明の一実施形態に係る耐衝撃性に優れた農薬用容器(以下、単に容器ともいう。)の容器本体の上面図(a1)、側面図(a2)及び容器本体の口部に螺合するキャップの上面図(b1)、側面図(b2)、背面図(b3)を示す。
The present invention will be described below based on preferred embodiments with reference to the drawings.
FIG. 1 is a top view (a1), a side view (a2), and a mouth of a container body of an agrochemical container (hereinafter also simply referred to as a container) excellent in impact resistance according to an embodiment of the present invention. A top view (b1), a side view (b2), and a rear view (b3) of the cap screwed into the part are shown.

図1に示すように、本実施形態の容器は、容器本体(以下、単に本体ともいう)と、容器本体に装着されるキャップ6とを備えている。   As shown in FIG. 1, the container of the present embodiment includes a container main body (hereinafter also simply referred to as a main body) and a cap 6 attached to the container main body.

容器本体は、天面に上方に向けて開口する口部1と把持部2を有している。口部1の外周面には、キャップ6を螺着させるためのねじ山が設けられている。
把持部2と口部1の間には把持部の長さ方向に対し、直角方向で円弧上のくぼみ5が存在する。
The container body has a mouth portion 1 and a grip portion 2 that open upward on the top surface. A screw thread for screwing the cap 6 is provided on the outer peripheral surface of the mouth portion 1.
Between the grip portion 2 and the mouth portion 1, there is a recess 5 on the arc in a direction perpendicular to the length direction of the grip portion.

キャップ6は、図2の断面図に示すように、外蓋6aの天面部の裏側に、弾性体6bがはめ込まれて組み立てられている。外蓋の周囲の形態は、円形で剛性を付与する為、周囲にリブが12か所設けられている。
外蓋の内周面には、口部1の外周面のねじ山と螺合するねじ溝が設けられている。キャップ6を構成する外蓋は、合成樹脂で一体成形される。
本発明は、前記実施形態に制限されない。
As shown in the cross-sectional view of FIG. 2, the cap 6 is assembled with an elastic body 6b fitted on the back side of the top surface portion of the outer lid 6a. The shape of the periphery of the outer lid is circular, and 12 ribs are provided around it in order to give rigidity.
On the inner peripheral surface of the outer lid, a thread groove that is screwed with a thread on the outer peripheral surface of the mouth portion 1 is provided. The outer lid constituting the cap 6 is integrally formed of synthetic resin.
The present invention is not limited to the embodiment.

本体の容量は5〜30Lであり、該容量は、口部や把持部が形成される天面より下の胴部における容量である。図1では略円筒状の胴部を示しているが、これに限定されず、角部が面取りされた角柱状の胴部でもよい。
容器本体天面に設けられる口部1は、その外直径(A)が30〜60mmの範囲であり、本体の容量によって、この範囲から適宜設定される。
付け根が前記口部と同じ天面にある把持部2は、容器本体を持ち上げる際に握ることが可能なように開口形状を有している。前記把持部2の開口の口部1に近い側の内接辺3から口部端までの距離(B)は20mm以上であり、前記把持部2と前記口部1との間に、前記把持部2の付け根4から深さ(C)が30〜50mmの下方向に円弧状に窪んだくぼみ5を有する。
くぼみ5は、容器が落下した際に口部1に係る衝撃を緩和する作用を有し、くぼみ5の深さ(C)が上記範囲外では、十分に衝撃緩和できずに本体の割れ・破壊が発生する。距離(B)が20mm未満では、くぼみ5の円弧の径が小さくなり、同様に十分に衝撃緩和できなくなる。なお、上記容量の本体では把持部2での持ちやすさの点で、距離(B)は60mm以下であることが好ましい。
The capacity of the main body is 5 to 30 L, and the capacity is a capacity in the trunk part below the top surface where the mouth part and the grip part are formed. Although FIG. 1 shows a substantially cylindrical body, the present invention is not limited to this, and a prismatic body having a chamfered corner may be used.
The mouth portion 1 provided on the top surface of the container body has an outer diameter (A) in the range of 30 to 60 mm, and is appropriately set from this range depending on the capacity of the body.
The grip portion 2 whose root is on the same top surface as the mouth portion has an opening shape so that it can be gripped when the container body is lifted. The distance (B) from the inscribed side 3 on the side close to the mouth 1 of the opening of the grip 2 to the mouth end is 20 mm or more, and the grip is between the grip 2 and the mouth 1. A depth 5 (C) from the base 4 of the part 2 has a depression 5 that is recessed in an arc shape in a downward direction of 30 to 50 mm.
The indentation 5 has a function of mitigating the impact on the mouth portion 1 when the container is dropped. If the depth (C) of the indentation 5 is out of the above range, the impact cannot be sufficiently mitigated and the main body cracks or breaks. Will occur. If the distance (B) is less than 20 mm, the diameter of the arc of the indentation 5 becomes small, and similarly the impact cannot be sufficiently relaxed. In addition, in the main body of the said capacity | capacitance, it is preferable that a distance (B) is 60 mm or less at the point of the ease of holding in the holding part 2. FIG.

本発明に係る容器の本体は、合成樹脂の一体成形体である。容器本体の構成材料としては、ポリエチレン、ポリプロピレン等の合成樹脂が挙げられる。合成樹脂は単一のものを使用しても良く、複数の樹脂を含有する組成物でも良く、また、複数の樹脂の積層体であっても良い。さらに、樹脂以外の金属、紙、ガラス等を構成の一部に有していても良い。   The main body of the container according to the present invention is an integrally molded body of synthetic resin. Examples of the constituent material of the container body include synthetic resins such as polyethylene and polypropylene. A single synthetic resin may be used, a composition containing a plurality of resins, or a laminate of a plurality of resins. Furthermore, you may have metals other than resin, paper, glass, etc. in a part of structure.

本発明では、本体が、下記のエチレン系樹脂組成物(X)を用いて成形した外層を少なくとも有するものである。   In the present invention, the main body has at least an outer layer formed by using the following ethylene-based resin composition (X).

エチレン系樹脂組成物(X):下記要件(i)〜(iv)を満たし、エチレンと炭素数6〜8のα−オレフィンとの共重合体を含むエチレン系樹脂(X1)をエチレン系樹脂成分の65〜100質量%含み、該エチレン系樹脂組成物(X)は、下記要件(v)〜(vii)の要件を満たす。   Ethylene-based resin composition (X): An ethylene-based resin component that satisfies the following requirements (i) to (iv) and contains a copolymer of ethylene and an α-olefin having 6 to 8 carbon atoms is an ethylene-based resin component The ethylene-based resin composition (X) satisfies the following requirements (v) to (vii).

(i)190℃、2.16kg荷重におけるメルトフローレート(MFR2(g/10分))が0.02〜0.20、
(ii)190℃、21.6kg荷重におけるメルトフローレート(MFR21(g/10分)が5〜20、
(iii)JIS K6922−2に準拠して測定した密度(kg/m)が954〜960、
(iv)GPCによる分子量が10,000以下の成分量が10質量%未満;
(v)190℃、2.16kg荷重におけるメルトフローレート(MFR2(g/10分))が0.02〜0.20
(vi)190℃、21.6kg荷重におけるメルトフローレート(MFR21(g/10分)が5〜20
(vii)JIS K6922−2に準拠して測定した密度(kg/m)が954〜960。
(I) A melt flow rate (MFR2 (g / 10 min)) at 190 ° C. and a load of 2.16 kg is 0.02 to 0.20,
(Ii) 190 ° C., melt flow rate at 21.6 kg load (MFR21 (g / 10 min) is 5 to 20,
(Iii) Density (kg / m 3 ) measured in accordance with JIS K6922-2 is 954-960,
(Iv) The amount of a component having a molecular weight of 10,000 or less by GPC is less than 10% by mass;
(V) Melt flow rate (MFR2 (g / 10 min)) at 190 ° C. and a load of 2.16 kg is 0.02 to 0.20.
(Vi) Melt flow rate (MFR21 (g / 10 min) is 5 to 20 at 190 ° C. and 21.6 kg load)
(Vii) The density (kg / m 3 ) measured according to JIS K6922-2 is 954 to 960.

なお、エチレン系樹脂(X1)をエチレン系樹脂成分の100質量%含む場合、要件(i)〜(iii)と要件(v)〜(vii)はそれぞれ同じとなる。   In addition, when the ethylene-based resin (X1) is included in 100% by mass of the ethylene-based resin component, the requirements (i) to (iii) and the requirements (v) to (vii) are the same.

要件(i)及び(v)のMFR2は、0.02〜0.20g/10分である。MFR2の下限は0.03g/10分が好ましく、0.05g/10分がより好ましい。MFR2の上限は0.15g/10分が好ましく、0.10g/10分がより好ましい。MFR2が0.02g/10分に満たない場合は、成形時に樹脂圧力高や、消費電力量の増大を招き、0.20g/10分を超えると、成形時の溶融樹脂の形状保持が不安定になるので好ましくない。   The MFR2 of requirements (i) and (v) is 0.02 to 0.20 g / 10 min. The lower limit of MFR2 is preferably 0.03 g / 10 minutes, more preferably 0.05 g / 10 minutes. The upper limit of MFR2 is preferably 0.15 g / 10 minutes, and more preferably 0.10 g / 10 minutes. If MFR2 is less than 0.02 g / 10 min, the resin pressure increases and power consumption increases during molding, and if it exceeds 0.20 g / 10 min, the shape of the molten resin during molding is unstable. This is not preferable.

要件(ii)及び(vi)のMFR21は5〜20g/10分である。MFR21の下限は7g/10分が好ましく、9g/10分がより好ましい。MFR21の上限は16g/10分が好ましく、12g/10分がより好ましい。MFR21が5g/10分に満たない場合は、成形時に樹脂圧力高や消費電力量の増大を招き、20g/10分を超えると、押出機の吐出量が低下するので好ましくない。   The MFR21 of requirements (ii) and (vi) is 5 to 20 g / 10 minutes. The lower limit of MFR21 is preferably 7 g / 10 minutes, more preferably 9 g / 10 minutes. The upper limit of MFR21 is preferably 16 g / 10 minutes, and more preferably 12 g / 10 minutes. When MFR21 is less than 5 g / 10 minutes, an increase in the resin pressure and power consumption is caused at the time of molding, and when it exceeds 20 g / 10 minutes, the discharge amount of the extruder is decreased, which is not preferable.

MFR2及びMFR21は、JIS K7210に準拠し、それぞれ190℃で2.16kg荷重及び21.6kg荷重で測定された値である。   MFR2 and MFR21 are values measured according to JIS K7210 at 190 ° C. with a 2.16 kg load and a 21.6 kg load, respectively.

要件(iii)及び(vii)の密度は、954〜960kg/mである。密度が954kg/mに満たない場合は、成形体の剛性が不足し、密度が960kg/mを超えると、本体割れが発生しやすくなるので好ましくない。 The density of requirements (iii) and (vii) is 954-960 kg / m 3 . When the density is less than 954 kg / m 3 , the molded body lacks rigidity, and when the density exceeds 960 kg / m 3 , the main body cracks are likely to occur, which is not preferable.

エチレン系樹脂(X1)は要件(iv)に示すように、GPCによる分子量が10,000以下の成分量が10質量%未満であり、低分子量成分の少ないエチレン系樹脂である。   As shown in the requirement (iv), the ethylene resin (X1) is an ethylene resin having a low molecular weight component with a molecular weight of 10,000 or less by GPC of less than 10% by mass.

エチレン系樹脂(X1)は、エチレンと炭素数6〜8のα−オレフィンとの共重合体を含む。炭素数6〜8のα−オレフィンとしては、具体的には、1−ヘキセン、1−ヘプテン、1−オクテンであり、好ましくは1−ヘキセンである。炭素数6〜8のα−オレフィンは1種を単独で用いても、2種以上を組み合わせてもよい。   The ethylene-based resin (X1) includes a copolymer of ethylene and an α-olefin having 6 to 8 carbon atoms. Specific examples of the α-olefin having 6 to 8 carbon atoms include 1-hexene, 1-heptene, and 1-octene, and preferably 1-hexene. A C6-C8 alpha olefin may be used individually by 1 type, or may combine 2 or more types.

エチレン系樹脂(X1)は、メタロセン触媒を用いた気相重合反応によって製造することができる。メタロセン触媒は遷移金属のメタロセン化合物を含む触媒を用いて製造することができる。このメタロセン化合物を含む触媒は、遷移金属のメタロセン化合物と有機アルミニウムオキシ化合物と担体とから形成されることが好ましく、さらに必要に応じて、これらと有機アルミニウム化合物とから形成されても良い。   The ethylene-based resin (X1) can be produced by a gas phase polymerization reaction using a metallocene catalyst. The metallocene catalyst can be produced using a catalyst containing a metallocene compound of a transition metal. The catalyst containing the metallocene compound is preferably formed from a transition metal metallocene compound, an organoaluminum oxy compound, and a carrier, and may be formed from these and an organoaluminum compound as necessary.

エチレン系樹脂(X1)としては、上記要件(i)〜(iv)を同時に満たすのであれば市販品やその特殊グレードを用いることができる。   As the ethylene resin (X1), a commercially available product or a special grade thereof can be used as long as the above requirements (i) to (iv) are satisfied at the same time.

エチレン系樹脂(X1)の量が100質量%未満の場合、他のエチレン系樹脂成分を含むことができるが、特に下記の要件(x)〜(xiii)を満たすエチレン樹脂(X2)を含むことが好ましい(ただし、前記共重合体(X1)とエチレン樹脂(X2)の前記エチレン系樹脂成分中の合計は100質量%)。   When the amount of the ethylene-based resin (X1) is less than 100% by mass, other ethylene-based resin components can be included, but particularly include the ethylene resin (X2) that satisfies the following requirements (x) to (xiii): (However, the total of the copolymer (X1) and the ethylene resin (X2) in the ethylene resin component is 100% by mass).

(x)190℃、2.16kg荷重におけるメルトフローレート(MFR2(g/10分))が0.02〜0.50、
(xi)190℃、21.6kg荷重におけるメルトフローレート(MFR21(g/10分)が3〜40、
(xii)JIS K6922−2に準拠して測定した密度(kg/m)が954〜960、及び
(xiii)GPCによる分子量が10,000以下の成分量が10質量%以上。
(X) The melt flow rate (MFR2 (g / 10 min)) at 190 ° C. and a load of 2.16 kg is 0.02 to 0.50,
(Xi) 190 ° C., melt flow rate at 21.6 kg load (MFR21 (g / 10 min) is 3 to 40,
(Xii) The density (kg / m 3 ) measured in accordance with JIS K6922-2 is 954 to 960, and (xiii) the amount of a component having a molecular weight by GPC of 10,000 or less is 10% by mass or more.

この場合、エチレン系樹脂組成物(X)におけるエチレン系樹脂(X2)の比率は、35質量%以下であるが、30質量%以下がより好ましい。   In this case, the ratio of the ethylene resin (X2) in the ethylene resin composition (X) is 35% by mass or less, and more preferably 30% by mass or less.

エチレン系樹脂(X2)としては、上記要件(x)〜(xiii)を同時に満たすのであれば市販品やその特殊グレードを用いることができる。   As the ethylene-based resin (X2), a commercially available product or a special grade thereof can be used as long as the above requirements (x) to (xiii) are satisfied at the same time.

エチレン系樹脂(X1)と(X2)は、従来公知の方法により混合または溶融混練することによってエチレン系樹脂組成物(X)として得られる。例えば押出機、ブラベンダープラストグラフ、バンバリミキサー、ニーダーブレンダー等を用いて溶融、混練し、エチレン系樹脂組成物(X)が得られる。該エチレン系樹脂組成物(X)は例えば押出機によってペレット状とするのが普通である。   Ethylene resin (X1) and (X2) are obtained as ethylene resin composition (X) by mixing or melt-kneading by a conventionally well-known method. For example, an ethylene resin composition (X) can be obtained by melting and kneading using an extruder, Brabender plastograph, Banbury mixer, kneader blender or the like. The ethylene-based resin composition (X) is usually formed into pellets by an extruder, for example.

エチレン系樹脂組成物(X)には、本発明の効果を損なわない範囲で公知の添加剤を必要に応じて添加することができる。添加剤としては、酸化防止剤、耐候安定剤、帯電防止剤、滑剤、ブロッキング防止剤、有機・無機顔料等、通常ポリオレフィンに使用される添加剤が挙げられる。   A known additive can be added to the ethylene-based resin composition (X) as necessary within a range not impairing the effects of the present invention. Examples of the additives include antioxidants, weathering stabilizers, antistatic agents, lubricants, antiblocking agents, organic / inorganic pigments and the like which are usually used for polyolefins.

本発明に係る容器の本体は、エチレン系樹脂組成物(X)の単層または多層構造に成形される。成形方法としては、従来公知の中空成形(ブロー成形)法により製造される。ブロー成形法には各種方法があり、押出ブロー成形法、2段ブロー成形法、射出成形法に大別される。本発明においては、特に押出ブロー成形法が好ましく採用される。   The main body of the container according to the present invention is formed into a single-layer or multilayer structure of the ethylene-based resin composition (X). As a molding method, it is produced by a conventionally known hollow molding (blow molding) method. There are various blow molding methods, which are roughly classified into an extrusion blow molding method, a two-stage blow molding method, and an injection molding method. In the present invention, an extrusion blow molding method is particularly preferably employed.

本発明に係る容器は、内容物である農薬の揮発、変質を抑制するために、ガスバリア性に優れた中間層を設けることが好ましい。ガスバリア層としては、公知のガスバリア性の材料を用いることができ、例えば、ナイロン類、ポリビニルアルコール類などが挙げられる。また、ガスバリア層と他の層との密着性を改善するため、酸変性ポリエチレン樹脂などの密着層を設けることができる。例えば、容器本体の内外層を本発明に係るエチレン系樹脂組成物(X)からなる層とし、酸変性ポリエチレン樹脂層に両側を挟まれたポリビニルアルコール層を中間層とすることができる。   The container according to the present invention is preferably provided with an intermediate layer excellent in gas barrier properties in order to suppress volatilization and alteration of the contents of the agricultural chemical. As the gas barrier layer, a known gas barrier material can be used, and examples thereof include nylons and polyvinyl alcohols. Moreover, in order to improve the adhesiveness between the gas barrier layer and other layers, an adhesive layer such as an acid-modified polyethylene resin can be provided. For example, the inner and outer layers of the container body can be made of the ethylene resin composition (X) according to the present invention, and the polyvinyl alcohol layer sandwiched on both sides by the acid-modified polyethylene resin layer can be used as the intermediate layer.

容器本体における把持部は、その根本の長手方向にくびれを設けて、屈曲可能に構成してもよい。このように屈曲可能な構成とすることで、落下時の衝撃を緩和する作用を持たせることができる。また、容器本体の胴部側面には強度を高めるためのリブ様のくぼみを設けてもよい。また、胴部に把持部とともに容器を持ち上げる際の取っ手となるくぼみを設けてもよい。   The gripping portion in the container body may be configured to be bent by providing a constriction in the longitudinal direction of the base. By adopting such a bendable configuration, it is possible to have an action of mitigating the impact at the time of dropping. Moreover, you may provide the rib-like hollow for raising an intensity | strength in the trunk | drum side surface of a container main body. Moreover, you may provide the hollow used as a handle at the time of raising a container with a holding part in a trunk | drum.

本発明に係る容器は、容器本体の口部に螺合するキャップの外蓋が下記のエチレン樹脂組成物(Y)を用いて成形されたものである。   In the container according to the present invention, the outer lid of the cap that is screwed into the mouth of the container body is formed using the following ethylene resin composition (Y).

エチレン樹脂組成物(Y):下記要件(viii)及び(ix)を満たす。
(viii)190℃、2.16kg荷重におけるMFR(g/10分)が0.02〜0.20、
(ix)JIS K6922−2に準拠して測定した密度(kg/m)が945〜955。
要件(viii)のMFRは、0.02〜0.20g/10分である。該MFRの下限は0.04g/10分が好ましく、0.06g/10分がより好ましい。該MFRの上限は0.18g/10分が好ましく、0.14g/10分がより好ましい。該MFRが0.02g/10分に満たない場合は、成形時に樹脂圧力高や、消費電力量の増大を招き、0.20g/10分を超えると、キャップの割れが発生し易くなるので好ましくない。
Ethylene resin composition (Y): The following requirements (viii) and (ix) are satisfied.
(Viii) 190 ° C., MFR (g / 10 min) at a load of 2.16 kg is 0.02 to 0.20,
(Ix) The density (kg / m 3 ) measured according to JIS K6922-2 is 945 to 955.
The MFR for requirement (viii) is 0.02 to 0.20 g / 10 min. The lower limit of the MFR is preferably 0.04 g / 10 min, and more preferably 0.06 g / 10 min. The upper limit of the MFR is preferably 0.18 g / 10 min, and more preferably 0.14 g / 10 min. If the MFR is less than 0.02 g / 10 min, it will increase the resin pressure and power consumption during molding, and if it exceeds 0.20 g / 10 min, cracking of the cap is likely to occur. Absent.

要件(ix)の密度は945〜955kg/mであり、容器本体を構成するエチレン系樹脂組成物(X)の密度よりも低いことが好ましい。 The density of requirement (ix) is 945 to 955 kg / m 3 and is preferably lower than the density of the ethylene-based resin composition (X) constituting the container body.

キャップの外周には前記したようにリブが設けられていることが好ましい。リブを設けることで、容器本体との螺合部である外蓋内壁への落下時の衝撃が緩和され、より液漏れしにくくなる。   It is preferable that a rib is provided on the outer periphery of the cap as described above. By providing the rib, the impact at the time of dropping on the inner wall of the outer lid, which is a screwed portion with the container main body, is alleviated, and the liquid is more difficult to leak.

キャップ外蓋の天面に配される弾性体は、発泡樹脂、ゴム等の弾性材の成形体であり、発泡ポリエチレンの成形体であることが好ましい。該弾性体は、パッキンとして作用し、キャップ締め付け時に締め付け圧が高くなりすぎることを緩和すると共に、変形して液漏れを抑制する。   The elastic body disposed on the top surface of the cap outer lid is a molded body of an elastic material such as foamed resin or rubber, and is preferably a molded body of foamed polyethylene. The elastic body acts as a packing, relieves that the tightening pressure becomes too high when the cap is tightened, and deforms to suppress liquid leakage.

このパッキンは、さらに少なくとも1層以上のバリア層を有することが好ましい。パッキンの厚みは1.8〜2.4mmの範囲内であることが好ましい。パッキンの厚みがこの範囲であれば、落下時の液漏れが効果的に抑制することができる。   This packing preferably further includes at least one barrier layer. The thickness of the packing is preferably in the range of 1.8 to 2.4 mm. When the thickness of the packing is within this range, liquid leakage at the time of dropping can be effectively suppressed.

以下、実施例を参照して、本発明を具体的に説明するが、本発明はこれらの実施例のみに限定されるものではない。
各物性の測定方法は以下の通りである。
EXAMPLES Hereinafter, although this invention is demonstrated concretely with reference to an Example, this invention is not limited only to these Examples.
The measuring method of each physical property is as follows.

<MFR測定方法>
MFRの測定は、JIS K7210に準拠(190℃で樹脂を溶融させ、10分間で規定の荷重をかけて押し出したストランドを計量)測定した。
<MFR measurement method>
The MFR was measured in accordance with JIS K7210 (the resin was melted at 190 ° C. and the extruded strand was weighed for 10 minutes and weighed).

<密度測定方法>
密度の測定は、JIS K6922−2に準拠し、MFR測定時に得られるストランドを100℃沸騰水中で30分間熱処理し、更に室温で1時間放置した後に密度勾配管法で測定した。
<Density measurement method>
The density was measured in accordance with JIS K6922-2, and the strand obtained at the time of MFR measurement was heat-treated in 100 ° C. boiling water for 30 minutes and further allowed to stand at room temperature for 1 hour, and then measured by a density gradient tube method.

<−40℃の引張衝撃試験>
JIS K7160「プラスチック−引張衝撃強さの試験方法」に記載の試験方法に準じて評価を行った。すなわち、成形温度:180℃、平均冷却速度:15℃/min、40℃にて取り出した4mm厚のプレスシートから、JIS K7160に記載の試験片4型に打ち抜いた。この試験片について、試験温度が−40℃、ハンマー容量が7.5J、空振り角度が148.8°の測定条件にて、引張衝撃強度を測定した。
<-40 ° C tensile impact test>
Evaluation was performed according to the test method described in JIS K7160 “Plastics—Test method for tensile impact strength”. That is, a 4 mm thick press sheet taken out at a molding temperature of 180 ° C., an average cooling rate of 15 ° C./min, and 40 ° C. was punched into a test specimen 4 type described in JIS K7160. With respect to this test piece, the tensile impact strength was measured under the measurement conditions of a test temperature of −40 ° C., a hammer capacity of 7.5 J, and an air swing angle of 148.8 °.

<落下試験前環境試験条件>
充填薬液クロルピクリン、充填量2kg、(40℃×1ヶ月→室温×1日→−15℃×3日→室温×1日)×3サイクル
<Environmental test conditions before drop test>
Filling liquid chlorpicrin, 2 kg, (40 ° C. × 1 month → room temperature × 1 day → −15 ° C. × 3 days → room temperature × 1 day) × 3 cycles

<落下試験条件>
充填剤エチレングリコール、充填量10kg、養生温度−18℃、養生時間48hr、落下高さ 2.7m
JIS Z1703に準拠し、容器内にエチレングリコールを充填して満液状態で密封し、雰囲気温度−18℃で、2.7mの高さから鉄板表面上に落下させる。この際、鉄板表面に容器の口部が当るように1回落下させたときに、本体の割れ・破壊、キャップからの液漏れ、キャップの割れ・破壊を目視で評価した。このとき、割れ・破壊、液漏れのないものを○、あるものを×とした。
<Drop test conditions>
Filler ethylene glycol, filling amount 10kg, curing temperature -18 ° C, curing time 48hr, drop height 2.7m
In accordance with JIS Z1703, the container is filled with ethylene glycol, sealed in a full liquid state, and dropped onto the iron plate surface from a height of 2.7 m at an atmospheric temperature of -18 ° C. At this time, when the container was dropped once so that the mouth of the container hits the surface of the iron plate, the cracking / breaking of the main body, the liquid leakage from the cap, and the cracking / breaking of the cap were visually evaluated. At this time, those without cracking / breaking and liquid leakage were marked with ○, and those with certain were marked with ×.

エチレン系樹脂組成物(X)及び(Y)の原料として、以下のエチレン系樹脂を用いた。
[エチレン系樹脂組成物(X)]
<エチレン樹脂(X1)>
X1−1:エボリューH(登録商標)SP6000(株式会社プライムポリマー製)
<エチレン樹脂(X2)>
X2−1:ハイゼックス(登録商標)6200BX(株式会社プライムポリマー製)
X2−2:ハイゼックス(登録商標)8800B(株式会社プライムポリマー製)
[エチレン系樹脂組成物(Y)]
Y−1:ハイゼックス(登録商標)5300B(株式会社プライムポリマー製)
Y−2:ハイゼックス(登録商標)6300M(株式会社プライムポリマー製)
各材料の物性を表1に示す。
The following ethylene resins were used as raw materials for the ethylene resin compositions (X) and (Y).
[Ethylene resin composition (X)]
<Ethylene resin (X1)>
X1-1: Evolu H (registered trademark) SP6000 (manufactured by Prime Polymer Co., Ltd.)
<Ethylene resin (X2)>
X2-1: Hi-Zex (registered trademark) 6200BX (manufactured by Prime Polymer Co., Ltd.)
X2-2: Hi-X (registered trademark) 8800B (manufactured by Prime Polymer Co., Ltd.)
[Ethylene resin composition (Y)]
Y-1: Hi-X (registered trademark) 5300B (manufactured by Prime Polymer Co., Ltd.)
Y-2: Hi-X (registered trademark) 6300M (manufactured by Prime Polymer Co., Ltd.)
Table 1 shows the physical properties of each material.

Figure 2018197120
Figure 2018197120

上記組成物を用いて、表2に示すように組成及び形状を変更して、容器本体とキャップをそれぞれ製造した。   Using the composition, the composition and shape were changed as shown in Table 2 to produce a container body and a cap, respectively.

容器本体は、以下のようにして製造した。
<容器本体成形条件>
中空成形機(日本製鋼(株)製)を用い、樹脂温度:210℃、押出量:58kg/hr、金型温度:20℃の条件で成形し、内容量10L、重量680gの容器本体を得た。
キャップにはパッキンとして2.0mmと1.0mmの発泡ポリエチレン製パッキン(ハイシート(登録商標)三井化学東セロ株式会社製)を用いた。
The container body was manufactured as follows.
<Container body molding conditions>
Using a hollow molding machine (manufactured by Nippon Steel Co., Ltd.), molding is performed under the conditions of resin temperature: 210 ° C., extrusion rate: 58 kg / hr, mold temperature: 20 ° C., and a container body with an internal volume of 10 L and a weight of 680 g is obtained. It was.
As the packing, 2.0 mm and 1.0 mm foamed polyethylene packing (High Sheet (registered trademark), Mitsui Chemicals, Inc.) was used.

キャップの成形は以下の通り行った。
<キャップ成形条件>
射出成形機(FANAC(株)製 S−2000i)を用い、樹脂温度:210℃、金型温度:40℃の条件で成形し、重量25gのキャップ製品を得た。
結果を表2(表2−1及び2−2)に示す。
The cap was molded as follows.
<Cap molding conditions>
Using an injection molding machine (S-2000i manufactured by FANAC Co., Ltd.), molding was performed under the conditions of resin temperature: 210 ° C. and mold temperature: 40 ° C. to obtain a cap product with a weight of 25 g.
The results are shown in Table 2 (Tables 2-1 and 2-2).

Figure 2018197120
Figure 2018197120

Figure 2018197120
Figure 2018197120

以上の通り、本発明の範囲内のエチレン系樹脂組成物(X)を用いて、所定形状に成形した容器本体と、本発明の範囲内のエチレン系樹脂組成物(Y)を用いて成形したキャップの組み合わせにおいては、本体及びキャップのいずれにも割れ・破壊は確認されなかった。本発明の範囲内のエチレン系樹脂組成物(X)を用いても、本発明で規定する以外の形状の容器本体では、本体の割れ・破壊が確認され、本発明の範囲外のエチレン系樹脂組成物(Y)を用いたキャップでは、キャップの割れ・破壊が確認された。本発明の範囲外のエチレン系樹脂組成物(X)を用いた容器本体では、本体の割れ・破壊が確認された。また、パッキンの厚みが本発明の範囲外では液漏れが見られた。   As described above, the container body molded into a predetermined shape using the ethylene resin composition (X) within the scope of the present invention and the ethylene resin composition (Y) within the scope of the present invention were molded. In the combination of caps, neither cracking nor destruction was confirmed in either the main body or the cap. Even if the ethylene-based resin composition (X) within the scope of the present invention is used, cracking / breaking of the main body is confirmed in a container body having a shape other than that defined in the present invention. In the cap using the composition (Y), cracking / destruction of the cap was confirmed. In the container main body using the ethylene-based resin composition (X) outside the scope of the present invention, it was confirmed that the main body was cracked or broken. Further, liquid leakage was observed when the thickness of the packing was outside the range of the present invention.

1:口部
2:把持部
3:内接辺
4:把持部付け根
5:くぼみ
6:キャップ
A:口部外直径
B:内接辺から口部端までの距離
C:くぼみ深さ
1: mouth part 2: gripping part 3: inscribed side 4: gripping part base 5: indentation 6: cap A: outer diameter of mouth part B: distance from inscribed side to mouth end C: indentation depth

Claims (4)

容量が5〜30Lであり、直径(A)が30〜60mmの口部(1)と、付け根が前記口部と同じ面にある把持部(2)とを有し、前記把持部(2)開口の口部(1)に近い側の内接辺(3)から口部端までの距離(B)が20mm以上であり、前記把持部(2)と前記口部(1)との間に、前記把持部(2)の付け根(4)から深さ(C)が30〜50mmの円弧状に窪んだくぼみ(5)を有する本体と、
前記口部に螺合するキャップ(6)を備える、農薬用容器であって、
前記本体が、下記のエチレン系樹脂組成物(X)を用いて成形した外層を少なくとも有し、前記キャップの外蓋が下記のエチレン樹脂組成物(Y)を用いて成形されたものである農薬用容器:
エチレン系樹脂組成物(X):下記要件(i)〜(iv)を満たし、エチレンと炭素数6〜8のα−オレフィンとの共重合体(X1)をエチレン系樹脂成分の65〜100質量%含み、該エチレン系樹脂組成物(X)は、下記要件(v)〜(vii)の要件を満たす。
(i)190℃、2.16kg荷重におけるメルトフローレート(MFR2(g/10分))が0.02〜0.20、
(ii)190℃、21.6kg荷重におけるメルトフローレート(MFR21(g/10分)が5〜20、
(iii)JIS K6922−2に準拠して測定した密度(kg/m)が954〜960、
(iv)GPCによる分子量が10,000以下の成分量が10質量%未満;
(v)190℃、2.16kg荷重におけるメルトフローレート(MFR2(g/10分))が0.02〜0.20
(vi)190℃、21.6kg荷重におけるメルトフローレート(MFR21(g/10分)が5〜20
(vii)JIS K6922−2に準拠して測定した密度(kg/m)が954〜960。
エチレン樹脂組成物(Y):下記要件(viii)及び(ix)を満たす。
(viii)190℃、2.16kg荷重におけるMFR(g/10分)が0.02〜0.20、
(ix)JIS K6922−2に準拠して測定した密度(kg/m)が945〜955。
It has a mouth part (1) having a capacity of 5 to 30 L and a diameter (A) of 30 to 60 mm, and a grip part (2) whose root is on the same surface as the mouth part, and the grip part (2) The distance (B) from the inscribed side (3) on the side close to the mouth (1) of the opening to the mouth end is 20 mm or more, and between the grip (2) and the mouth (1) A body having a depression (5) recessed in an arc shape having a depth (C) of 30 to 50 mm from the base (4) of the gripping part (2);
A pesticide container comprising a cap (6) screwed into the mouth,
The agrochemical in which the main body has at least an outer layer molded using the following ethylene-based resin composition (X), and the outer lid of the cap is molded using the following ethylene resin composition (Y) Container for:
Ethylene-based resin composition (X): The following requirements (i) to (iv) are satisfied, and a copolymer (X1) of ethylene and an α-olefin having 6 to 8 carbon atoms is 65 to 100 mass of an ethylene-based resin component. %, The ethylene-based resin composition (X) satisfies the following requirements (v) to (vii).
(I) A melt flow rate (MFR2 (g / 10 min)) at 190 ° C. and a load of 2.16 kg is 0.02 to 0.20,
(Ii) 190 ° C., melt flow rate at 21.6 kg load (MFR21 (g / 10 min) is 5 to 20,
(Iii) Density (kg / m 3 ) measured in accordance with JIS K6922-2 is 954-960,
(Iv) The amount of a component having a molecular weight of 10,000 or less by GPC is less than 10% by mass;
(V) Melt flow rate (MFR2 (g / 10 min)) at 190 ° C. and a load of 2.16 kg is 0.02 to 0.20.
(Vi) Melt flow rate (MFR21 (g / 10 min) is 5 to 20 at 190 ° C. and 21.6 kg load)
(Vii) The density (kg / m 3 ) measured according to JIS K6922-2 is 954 to 960.
Ethylene resin composition (Y): The following requirements (viii) and (ix) are satisfied.
(Viii) 190 ° C., MFR (g / 10 min) at a load of 2.16 kg is 0.02 to 0.20,
(Ix) The density (kg / m 3 ) measured according to JIS K6922-2 is 945 to 955.
前記エチレン系樹脂組成物(X)は、下記の要件(x)〜(xiii)を満たすエチレン樹脂(X2)を含む(ただし、前記共重合体(X1)とエチレン樹脂(X2)の前記エチレン系樹脂成分中の合計は100質量%)ことを特徴とする請求項1に記載の農薬用容器:
(x)190℃、2.16kg荷重におけるメルトフローレート(MFR2(g/10分))が0.02〜0.50、
(xi)190℃、21.6kg荷重におけるメルトフローレート(MFR21(g/10分)が3〜40、
(xii)JIS K6922−2に準拠して測定した密度(kg/m)が954〜960、及び
(xiii)GPCによる分子量が10,000以下の成分量が10質量%以上。
The ethylene-based resin composition (X) includes an ethylene resin (X2) that satisfies the following requirements (x) to (xiii) (however, the ethylene-based resin of the copolymer (X1) and the ethylene resin (X2)) The total amount in the resin component is 100% by mass). The agricultural chemical container according to claim 1, wherein:
(X) The melt flow rate (MFR2 (g / 10 min)) at 190 ° C. and a load of 2.16 kg is 0.02 to 0.50,
(Xi) 190 ° C., melt flow rate at 21.6 kg load (MFR21 (g / 10 min) is 3 to 40,
(Xii) The density (kg / m 3 ) measured in accordance with JIS K6922-2 is 954 to 960, and (xiii) the amount of a component having a molecular weight by GPC of 10,000 or less is 10% by mass or more.
前記キャップ(6)は、前記外蓋の内側に、発泡エチレン樹脂からなる弾性体を含む厚さ(mm)1.8〜2.4のパッキンを備えることを特徴とする、請求項1又は2に記載の農薬用容器。   The said cap (6) is provided with the packing of thickness (mm) 1.8-2.4 containing the elastic body which consists of foamed ethylene resin inside the said outer cover, The Claim 1 or 2 characterized by the above-mentioned. A container for agricultural chemicals according to 1. 前記本体は、前記エチレン系樹脂組成物(X)を用いて成形した層を内外層とし、酸変性ポリエチレンを含有する密着層に両側を挟まれたポリビニルアルコール層を有する請求項1〜3のいずれか1項に記載の農薬用容器。   The said main body has the polyvinyl alcohol layer by which the layer shape | molded using the said ethylene-type resin composition (X) was made into an inner-outer layer, and the both sides were pinched | interposed into the contact | adherence layer containing acid-modified polyethylene. A container for agricultural chemicals according to claim 1.
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002145234A (en) * 2000-11-09 2002-05-22 Sekisui Seikei Ltd Container
JP2006290944A (en) * 2005-04-06 2006-10-26 Nippon Polyethylene Kk Polyolefin resin material for container cover and container cover made thereof
JP2015010104A (en) * 2013-06-26 2015-01-19 三井化学株式会社 Hollow molding comprising polyethylene-based resin
JP2016145075A (en) * 2015-01-29 2016-08-12 日本化薬株式会社 Packing of agricultural chemical container

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002145234A (en) * 2000-11-09 2002-05-22 Sekisui Seikei Ltd Container
JP2006290944A (en) * 2005-04-06 2006-10-26 Nippon Polyethylene Kk Polyolefin resin material for container cover and container cover made thereof
JP2015010104A (en) * 2013-06-26 2015-01-19 三井化学株式会社 Hollow molding comprising polyethylene-based resin
JP2016145075A (en) * 2015-01-29 2016-08-12 日本化薬株式会社 Packing of agricultural chemical container

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