JPH0741908B2 - Multi-layer blow container for liquid agent containing surfactant - Google Patents
Multi-layer blow container for liquid agent containing surfactantInfo
- Publication number
- JPH0741908B2 JPH0741908B2 JP14103891A JP14103891A JPH0741908B2 JP H0741908 B2 JPH0741908 B2 JP H0741908B2 JP 14103891 A JP14103891 A JP 14103891A JP 14103891 A JP14103891 A JP 14103891A JP H0741908 B2 JPH0741908 B2 JP H0741908B2
- Authority
- JP
- Japan
- Prior art keywords
- layer
- container
- agent containing
- liquid agent
- rigidity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000007788 liquid Substances 0.000 title claims description 22
- 239000003795 chemical substances by application Substances 0.000 title claims description 21
- 239000004094 surface-active agent Substances 0.000 title claims description 20
- 239000011347 resin Substances 0.000 claims description 37
- 229920005989 resin Polymers 0.000 claims description 37
- 229920001903 high density polyethylene Polymers 0.000 claims description 15
- 239000004700 high-density polyethylene Substances 0.000 claims description 15
- 230000006353 environmental stress Effects 0.000 claims description 9
- 239000010410 layer Substances 0.000 description 78
- 230000000052 comparative effect Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 238000005336 cracking Methods 0.000 description 5
- 230000000704 physical effect Effects 0.000 description 5
- 239000003599 detergent Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000002356 single layer Substances 0.000 description 3
- 239000004902 Softening Agent Substances 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 2
- LFYJSSARVMHQJB-QIXNEVBVSA-N bakuchiol Chemical compound CC(C)=CCC[C@@](C)(C=C)\C=C\C1=CC=C(O)C=C1 LFYJSSARVMHQJB-QIXNEVBVSA-N 0.000 description 2
- 238000000071 blow moulding Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010101 extrusion blow moulding Methods 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000013502 plastic waste Substances 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D1/00—Rigid or semi-rigid containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material or by deep-drawing operations performed on sheet material
- B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
- B65D1/0207—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by material, e.g. composition, physical features
- B65D1/0215—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by material, e.g. composition, physical features multilayered
Landscapes
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
- Laminated Bodies (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、洗剤，柔軟剤等の容器
として好適に使用される界面活性剤を含む液剤用多層ブ
ロー容器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-layer blow container for a liquid agent containing a surfactant, which is preferably used as a container for detergents, softeners and the like.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】近年、
産業廃棄物による環境破壊が大きな問題になっており、
プラスチック容器についても、廃棄物の量を減らすとい
う観点から、できるだけ軽量化すること、が望まれてい
る。また、低コスト化という面からも、プラスチック容
器の軽量化は大きな課題である。2. Description of the Related Art In recent years,
Environmental destruction due to industrial waste has become a major issue,
Plastic containers are also desired to be as light as possible from the viewpoint of reducing the amount of waste. Also, from the viewpoint of cost reduction, reducing the weight of the plastic container is a major issue.
【０００３】ところで、液体洗剤や柔軟剤などの界面活
性剤を含む液剤の容器としては、従来結晶性ポリオレフ
ィンによる単層容器が主流であるが、結晶性ポリオレフ
ィンの中には界面活性剤の作用で環境応力亀裂を発生し
易いものがあるため、材料選択の際は耐環境応力亀裂特
性（以下ＥＳＣＲと記す）に優れた材料を選択する必要
がある。また、容器の変形等の防止のため、ある一定以
上の剛性も同時に要求される。By the way, as a container for a liquid agent containing a surfactant such as a liquid detergent or a softening agent, a single-layer container made of a crystalline polyolefin has hitherto been mainly used. Since some materials easily cause environmental stress cracking, it is necessary to select a material having excellent environmental stress cracking resistance (hereinafter referred to as ESCR) when selecting a material. In addition, a certain degree of rigidity or more is required at the same time to prevent deformation of the container.
【０００４】この場合、ＥＳＣＲを満足する樹脂は一般
に剛性に劣るため、このような樹脂のみを用いる場合、
剛性保持の必要から容器の肉厚を増さざるをえず、その
ため重量が大きくなってしまうという不都合が生じる。
これに対し、上記不都合を解消するためにＥＳＣＲに優
れた樹脂層と剛性に優れた樹脂層を設け、多層化するこ
とが考えられる。しかし、ＥＳＣＲと剛性は相反する樹
脂特性であるため、ＥＳＣＲの良好な樹脂と剛性の良好
な樹脂とを単に積層しただけでは、両樹脂の接着性など
により、ＥＳＣＲと剛性とを共に満足し、しかも十分な
容器特性を有する容器が得られないという問題があっ
た。本発明は、上記事情に鑑みなされたもので、ＥＳＣ
Ｒ及び剛性のいずれにも優れ、しかも軽量な界面活性剤
を含む液剤用多層ブロー容器を提供することを目的とす
る。In this case, since a resin satisfying ESCR is generally inferior in rigidity, when only such a resin is used,
Since it is necessary to maintain the rigidity, the wall thickness of the container must be increased, which causes a problem that the weight becomes large.
On the other hand, in order to solve the above-mentioned inconvenience, it is conceivable to provide a resin layer excellent in ESCR and a resin layer excellent in rigidity to form a multilayer structure. However, since ESCR and rigidity are resin properties that are contradictory to each other, simply laminating a resin having good ESCR and a resin having good rigidity will satisfy both ESCR and rigidity due to the adhesiveness of both resins, Moreover, there is a problem that a container having sufficient container characteristics cannot be obtained. The present invention has been made in view of the above circumstances.
It is an object of the present invention to provide a multi-layer blow container for a liquid agent, which is excellent in both R and rigidity and is lightweight.
【０００５】[0005]
【課題を解決するための手段及び作用】本発明者らは、
上記目的を達成するために鋭意検討を行なった結果、界
面活性剤を含む液剤用多層ブロー容器の内容物と接する
内層をＥＳＣＲに優れた特定物性の高密度ポリエチレン
樹脂で形成し、かつこの内層より外側にある外層を剛性
に優れた特定物性の高密度ポリエチレン樹脂で形成する
と共に、内層と外層の層厚比を特定の範囲とすることに
より、界面活性剤を含む液剤用多層ブロー容器の剛性を
低下させることなくＥＳＣＲを格段に向上させることが
できると共に、軽量化を達成できることを見い出し、本
発明をなすに至った。Means and Actions for Solving the Problems The present inventors have
As a result of earnest studies to achieve the above object, as a result, the inner layer in contact with the contents of the multi-layer blow container for liquid agent containing a surfactant is formed of a high-density polyethylene resin having specific physical properties excellent in ESCR, and By forming the outer layer on the outside with a high density polyethylene resin with excellent physical properties that has excellent rigidity and setting the layer thickness ratio of the inner layer to the outer layer within a specific range, the rigidity of the multi-layer blow container for liquid agent containing a surfactant can be improved. The present invention has been accomplished by finding that the ESCR can be remarkably improved without lowering and the weight reduction can be achieved.
【０００６】従って、本発明は、密度が０．９４５〜
０．９５５ｇ／ｃｍ3で耐環境応力亀裂特性が１０００
ｈｒ以上の高密度ポリエチレン樹脂からなる内層と、密
度が０．９６０〜０．９７０ｇ／ｃｍ3で引張弾性率が
１６０００〜１８０００Ｋｇ／ｃｍ2の高密度ポリエチ
レン樹脂からなる外層とを有し、かつ内層の耐環境応力
亀裂特性値が外層の耐環境応力亀裂特性値より高いと共
に、内層の厚さと外層の厚さとの比が３：９７〜３０：
７０であることを特徴とする界面活性剤を含む液剤用多
層ブロー容器を提供する。Therefore, the present invention has a density of 0.945 to
Environmental stress cracking resistance is 1000 at 0.955 g / cm 3.
An inner layer made of a high-density polyethylene resin having an hr or more, and an outer layer made of a high-density polyethylene resin having a density of 0.960 to 0.970 g / cm 3 and a tensile modulus of 16000 to 18000 Kg / cm 2 , and an inner layer The environmental stress crack resistance characteristic value of is higher than the environmental stress crack resistance characteristic value of the outer layer, and the ratio of the thickness of the inner layer to the thickness of the outer layer is 3:97 to 30:
A multi-layer blow container for a liquid agent containing a surfactant is provided.
【０００７】以下、本発明につき更に詳しく説明する。
本発明界面活性剤を含む液剤用多層ブロー容器におい
て、内層を構成する樹脂としては、高密度ポリエチレン
を用いる。The present invention will be described in more detail below.
In the multilayer blow container for liquid agent containing the surfactant of the present invention, high density polyethylene is used as the resin forming the inner layer.
【０００８】この内層を構成する高密度ポリエチレン樹
脂としては、密度が０．９４５〜０．９５５ｇ／ｃｍ3
で、ＥＳＣＲが１０００ｈｒのものを用いる。また、内
層を構成する高密度ポリエチレン樹脂は、ＥＳＣＲが外
層のそれより高いものである。ここで、ＥＳＣＲはＪＩ
Ｓ Ｋ６７６０に規定された定ひずみ耐環境応力亀裂特
性の値をいう。内層の樹脂の密度が０．９５５ｇ／ｃｍ
3を超える場合及びＥＳＣＲが１０００ｈｒ未満の場合
は、いずれも容器のＥＳＣＲが不十分となる。The high density polyethylene resin constituting this inner layer has a density of 0.945 to 0.955 g / cm 3.
Then, the one having an ESCR of 1000 hr is used. The high-density polyethylene resin forming the inner layer has a higher ESCR than that of the outer layer. Where ESCR is JI
It refers to the value of the constant strain environment resistant stress cracking property specified in SK6760. The resin density of the inner layer is 0.955 g / cm
If it exceeds 3 or if the ESCR is less than 1000 hr, the ESCR of the container is insufficient.
【０００９】また、内層の樹脂のＭＩ（メルトインデッ
クス）に特に制限はないが、１ｇ／１０分以下、特に
０．１〜０．５ｇ／１０分であることが成形性の点で望
ましい。しかし、特に外層の樹脂のＭＩが０．５ｇ／１
０分以下の場合は、内層の樹脂のＭＩは１ｇ／１０分を
超えても差し支えない。なお、内層の樹脂の引張弾性率
は限られないが、１００００〜１３０００Ｋｇ／ｃｍ2
であることが容器の剛性の点で好ましい。The MI (melt index) of the resin of the inner layer is not particularly limited, but it is preferably 1 g / 10 minutes or less, particularly 0.1 to 0.5 g / 10 minutes from the viewpoint of moldability. However, the MI of the resin in the outer layer is 0.5 g / 1
If it is 0 minutes or less, the MI of the resin in the inner layer may exceed 1 g / 10 minutes. The tensile modulus of elasticity of the resin of the inner layer is not limited, but it is 10,000 to 13000 Kg / cm 2.
Is preferable from the viewpoint of the rigidity of the container.
【００１０】本発明の界面活性剤を含む液剤用多層ブロ
ー容器において、外層の樹脂としては高密度ポリエチレ
ン樹脂を用いる。この外層を構成する高密度ポリエチレ
ン樹脂としては、密度が０．９６０〜０．９７０ｇ／ｃ
ｍ3で、引張弾性率が１６０００〜１８０００Ｋｇ／ｃ
ｍ2のものを用いる。ここで、引張弾性率はＪＩＳ Ｋ７
１１３に規定された引張弾性率の値をいう。外層の樹脂
の密度が０．９６ｇ／ｃｍ3 未満の場合及び引張弾性率
が１６０００Ｋｇ／ｃｍ2未満の場合は、いずれも容器
の剛性が不十分になる。In the multi-layer blow container for a liquid agent containing the surfactant of the present invention, a high density polyethylene resin is used as the resin of the outer layer. As the high-density polyethylene resin forming this outer layer, the density is 0.960 to 0.970 g / c.
m 3 and tensile modulus of 16,000 to 18,000 Kg / c
m 2 is used. Here, the tensile modulus is JIS K7
The value of the tensile elastic modulus specified in 113. When the resin density of the outer layer is less than 0.96 g / cm 3 and the tensile modulus is less than 16000 Kg / cm 2 , the rigidity of the container becomes insufficient.
【００１１】また、外層の樹脂のＭＩに限定はないが、
０．５ｇ／１０分以下、特に０．１〜０．５ｇ／１０分
であることが成形性の点で望ましい。なお、外層の樹脂
のＥＳＣＲに限定はないが、１００〜３００ｈｒである
ことが容器のＥＳＣＲの点で好ましい。The MI of the resin of the outer layer is not limited,
From the viewpoint of moldability, it is preferably 0.5 g / 10 minutes or less, particularly 0.1 to 0.5 g / 10 minutes. The ESCR of the resin of the outer layer is not limited, but 100 to 300 hr is preferable in terms of the ESCR of the container.
【００１２】上記内層の厚さと外層の厚さとの比（内
層：外層）は、３：９７〜３０：７０、好ましくは５：
９５〜２０：８０とする。内層の厚みが３０％を超え、
外層の厚みが７０％未満の場合、満足できる容器の剛性
が得られない。内層の厚みが３％未満で、外層の厚みが
９７％を超える場合、満足できる容器のＥＳＣＲが得ら
れない。The ratio of the thickness of the inner layer to the thickness of the outer layer (inner layer: outer layer) is 3:97 to 30:70, preferably 5:
95 to 20:80. The thickness of the inner layer exceeds 30%,
When the thickness of the outer layer is less than 70%, satisfactory container rigidity cannot be obtained. When the thickness of the inner layer is less than 3% and the thickness of the outer layer exceeds 97%, a satisfactory ESCR of the container cannot be obtained.
【００１３】本発明の界面活性剤を含む液剤用多層ブロ
ー容器においては、必要に応じ、前記内層と外層との間
に中間層を設けることができる。中間層は単層に形成し
てもよく、多層に形成してもよい。このように中間層を
設ける場合、外層の厚みを全体の５０％以上とすること
が好ましい。５０％未満であると容器の剛性が不十分に
なることがある。中間層を形成する樹脂の種類に制限は
なく、目的に応じて任意の樹脂を選択することができ
る。また、成形品やバリから得られる再生材や、内層及
び外層に用いる樹脂の任意割合での混合物などを用いる
こともできる。In the multi-layer blow container for a liquid agent containing the surfactant of the present invention, an intermediate layer can be provided between the inner layer and the outer layer, if necessary. The intermediate layer may be formed as a single layer or a multilayer. When the intermediate layer is thus provided, the thickness of the outer layer is preferably 50% or more of the whole. If it is less than 50%, the container may have insufficient rigidity. The type of resin forming the intermediate layer is not limited, and any resin can be selected according to the purpose. It is also possible to use a recycled material obtained from a molded product or a burr, a mixture of resins used in the inner layer and the outer layer in an arbitrary ratio, and the like.
【００１４】また、本発明界面活性剤を含む液剤用多層
ブロー容器においては、内層と外層との間、或いは内層
と中間層との間、外層と中間層との間などに、必要に応
じ接着層を設けることができる。この場合、接着層の全
厚みは全体の厚みの１０％以下とすることが望ましい。
接着層の全厚みが１０％を超えると、満足できる容器の
剛性が得られないことがある。なお、内層及び外層ある
いは中間層を形成する樹脂には、必要に応じ、酸化防止
剤、耐候剤等の添加剤を適宜添加することができる。In the multi-layer blow container for a liquid agent containing the surfactant of the present invention, adhesion may be made between the inner layer and the outer layer, between the inner layer and the intermediate layer, between the outer layer and the intermediate layer, if necessary. Layers can be provided. In this case, the total thickness of the adhesive layer is preferably 10% or less of the total thickness.
If the total thickness of the adhesive layer exceeds 10%, satisfactory container rigidity may not be obtained. If necessary, additives such as an antioxidant and a weathering agent can be appropriately added to the resin forming the inner layer and the outer layer or the intermediate layer.
【００１５】本発明界面活性剤を含む液剤用多層ブロー
容器の製造方法に限定はなく、公知の多層ブロー成形法
によって製造することができる。例えば、複数の押出機
によって各層を形成する樹脂をそれぞれ可塑化、混練
し、多層パリソンを押し出した後、この多層パリソンを
金型ではさみ、空気を吹き込むことにより金型キャビテ
ィ形状に賦形し、冷却、固化することにより、任意形状
の本発明界面活性剤を含む液剤用多層ブロー容器を成形
することができる。The method for producing the multi-layer blow container for a liquid agent containing the surfactant of the present invention is not limited, and it can be produced by a known multi-layer blow molding method. For example, plasticizing each of the resins forming each layer by a plurality of extruders, kneading, and after extruding the multilayer parison, sandwich the multilayer parison in the mold, shape the mold cavity shape by blowing air, By cooling and solidifying, a multilayer blow container for a liquid agent containing the surfactant of the present invention in an arbitrary shape can be molded.
【００１６】[0016]
【実施例】次に、実施例により本発明を具体的に示す
が、本発明は下記実施例に限定されるものではない。表
１に示す樹脂を用い、表２に示す層構成及び重量の実施
例１〜４及び比較例１〜４の界面活性剤を含む液剤用多
層ブロー容器（容量７００ｍｌのハンドルボトル）を製
造した。この場合、各容器の製造は前述した方法、即ち
二機又は三機の押出機を用いて押出ブロー成形法で多層
パリソンを押し出し、この多層パリソンをブロー成形す
る方法によって行なった。なお、成形機としては田原昭
栄機工（株）製ＴＰＥ−４を用いた。また、樹脂押出時
の設定温度は２００℃とし、各押出機の押出量をコント
ロールすることにより所定の層構成を与えた。EXAMPLES Next, the present invention will be illustrated concretely by examples, but the present invention is not limited to the following examples. Using the resins shown in Table 1, multilayer blow containers for liquid agents (handle bottles having a capacity of 700 ml) containing the surfactants of Examples 1 to 4 and Comparative Examples 1 to 4 having the layer configurations and weights shown in Table 2 were produced. In this case, each container was manufactured by the above-described method, that is, a method of extruding a multilayer parison by an extrusion blow molding method using two or three extruders and blow molding the multilayer parison. As the molding machine, TPE-4 manufactured by Tahara Shoei Kiko Co., Ltd. was used. Further, the preset temperature during resin extrusion was set to 200 ° C., and a predetermined layer structure was provided by controlling the extrusion amount of each extruder.
【００１７】各層を構成する樹脂の物性を表１に、得ら
れた界面活性剤を含む液剤用多層ブロー容器の物性を表
２に示す。なお、これらの物性はそれぞれ下記方法で測
定した。 引張弾性率（表１）：ＪＩＳ Ｋ７１１３に準拠して測
定した。 ＥＳＣＲ（表１）：ＪＩＳ Ｋ６７６０に準拠して測定
した。 ３ｍｍ変形時の荷重（表２）：クロスヘッドスピード１
２．５ｍｍ／分で容器（７００ｍｌのハンドルボトル）
に圧縮変形を加えたときに、容器が３ｍｍ変形したとき
の荷重を測定した。 ボトルＥＳＣＲ（表２）：容器（７００ｍｌのハンドル
ボトル）にその容積の１０％容量の界面活性剤（ライオ
ン（株）製液体トップ）を入れ、６０℃の環境下に放置
した。１２０時間経過した時点で５個のサンプル中ひと
つも亀裂が発生しなかったものを○、ひとつでも亀裂が
発生したものを×とした。Table 1 shows the physical properties of the resin constituting each layer, and Table 2 shows the physical properties of the obtained multilayer blow container for liquid agent containing the surfactant. In addition, these physical properties were measured by the following methods. Tensile elastic modulus (Table 1): Measured according to JIS K7113. ESCR (Table 1): Measured according to JIS K6760. Load when deformed by 3 mm (Table 2): Crosshead speed 1
Container at 2.5 mm / min (700 ml handle bottle)
The load when the container was deformed by 3 mm when compressive deformation was applied to was measured. Bottle ESCR (Table 2): A container (700 ml handle bottle) was charged with 10% by volume of the surfactant (Lion Co., Ltd. liquid top) and left in an environment of 60 ° C. When 120 hours had elapsed, none of the five samples had a crack, and the case where even one had a crack was rated as x.
【００１８】[0018]
【表１】 [Table 1]
【００１９】[0019]
【表２】 [Table 2]
【００２０】表２の検討結果は次の通りである。 実施例１と比較例１との比較から、内層にＥＳＣＲに
優れたＨＤＰＥ Ｂ層を設けることによりボルトＥＳＣ
Ｒが向上すること、及び実施例１の容器は内層に剛性の
低いＨＤＰＥ Ｂを有するにもかかわらず、剛性の高い
ＨＤＰＥ Ａ単体からなる比較例１の容器と同等以上の
剛性を有することがわかる。 実施例２と比較例２を比べると、容器の重量を変えて
も上記と同様の結果を示すことがわかる。 実施例３は実施例２の内層の構成比を３０％にしたも
のであるが、この場合も剛性は十分な値を示すことがわ
かる。 比較例３は実施例３の内層の構成比をさらに厚くし、
４０％にしたものであるが、このように内層を４０％ま
で増すと剛性の低下が大きくなり、もはや本発明の効果
を示さないことがわかる。 実施例２と比較例４を比較すると、実施例２の容器は
ＨＤＰＥ Ｃ単体からなる比較例４の容器よりもボトル
ＥＳＣＲが優れていること、また実施例２の容器は比較
例４の容器よりも重量を１０％削減しているにもかかわ
らず、ほぼ同等の剛性を有していることがわかる。 実施例４は中間層に再生材層を設けたものであるが、
この場合も剛性、ＥＳＣＲは十分満足できることがわか
る。 以上〜の結果より、本発明の界面活性剤を含む液剤
用多層ブロー容器は、最適な材料特性、層構成比を選ぶ
ことにより、外層の高剛性樹脂を単独で用いた単層容器
と同等以上の剛性を保持しつつ、ＥＳＣＲを向上させる
ことができると共に、現行の容器に比べて１０％あるい
はそれ以上の重量削減が可能であることが認められる。The examination results of Table 2 are as follows. From the comparison between Example 1 and Comparative Example 1, the bolt ESC is obtained by providing the HDPE B layer having excellent ESCR as the inner layer.
It can be seen that R is improved and that the container of Example 1 has the rigidity equal to or higher than that of the container of Comparative Example 1 made of HDPE A alone having high rigidity, even though HDPE B having low rigidity is included in the inner layer. . Comparing Example 2 with Comparative Example 2, it can be seen that the same results as above are exhibited even if the weight of the container is changed. In Example 3, the composition ratio of the inner layer of Example 2 was set to 30%, and it is understood that the rigidity also shows a sufficient value in this case. Comparative Example 3 further increases the composition ratio of the inner layer of Example 3,
Although the content is 40%, it can be seen that when the inner layer is increased to 40%, the decrease in rigidity becomes large, and the effect of the present invention is no longer exhibited. Comparing Example 2 and Comparative Example 4, the container of Example 2 has a better bottle ESCR than the container of Comparative Example 4 made of HDPE C alone, and the container of Example 2 is better than the container of Comparative Example 4. Even though the weight is reduced by 10%, it has almost the same rigidity. Example 4 has a recycled material layer provided in the intermediate layer,
Also in this case, it can be seen that the rigidity and ESCR are sufficiently satisfied. From the above results, the multilayer blow container for a liquid agent containing the surfactant of the present invention is equivalent to or more than the single layer container using the high rigidity resin of the outer layer alone by selecting the optimum material characteristics and the layer constitution ratio. It is recognized that the ESCR can be improved while maintaining the rigidity of the container, and the weight can be reduced by 10% or more as compared with the existing container.
【００２１】[0021]
【発明の効果】以上説明したように、本発明の界面活性
剤を含む液剤用多層ブロー容器は、耐環境応力亀裂特性
及び剛性のいずれにも優れていると共に、軽量でコスト
的にも有利なものである。従って、本発明の界面活性剤
を含む液剤用多層ブロー容器は、洗剤，柔軟剤等の界面
活性剤を含む液剤の容器として特に好適に使用すること
ができ、またプラスチック廃棄物量の軽減にも寄与する
ものである。As described above, the multilayer blow container for liquid agent containing the surfactant of the present invention is excellent in both environmental stress cracking resistance and rigidity, and is lightweight and advantageous in cost. It is a thing. Therefore, the multilayer blow container for a liquid agent containing the surfactant of the present invention can be particularly suitably used as a container for a liquid agent containing a surfactant such as a detergent or a softening agent, and also contributes to reduction of the amount of plastic waste. To do.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 安田 慎悟 千葉県市原市西広398の３ (56)参考文献 特開 昭53−61478（ＪＰ，Ａ) 特開 昭55−142650（ＪＰ，Ａ) 特開 昭53−61479（ＪＰ，Ａ) 特開 昭54−113678（ＪＰ，Ａ) 特開 昭54−146183（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shingo Yasuda 398-3, Nishihiro, Ichihara-shi, Chiba (56) Reference JP-A-53-61478 (JP, A) JP-A-55-142650 (JP, A) Special Kai 53-61479 (JP, A) JP 54-113678 (JP, A) JP 54-146183 (JP, A)
Claims (1)
3で耐環境応力亀裂特性が１０００ｈｒ以上の高密度ポ
リエチレン樹脂からなる内層と、密度が０．９６０〜
０．９７０ｇ／ｃｍ3で引張弾性率が１６０００〜１８
０００Ｋｇ／ｃｍ2の高密度ポリエチレン樹脂からなる
外層とを有し、かつ内層の耐環境応力亀裂特性値が外層
の耐環境応力亀裂特性値より高いと共に、内層の厚さと
外層の厚さとの比が３：９７〜３０：７０であることを
特徴とする界面活性剤を含む液剤用多層ブロー容器。1. The density is 0.945 to 0.955 g / cm.
3 , an inner layer made of high-density polyethylene resin with environmental stress crack resistance of 1000 hr or more, and a density of 0.960-
Tensile elastic modulus of 16000 to 18 at 0.970 g / cm 3.
And an outer layer made of a high-density polyethylene resin of 000 Kg / cm 2 , and the environmental stress crack resistance characteristic value of the inner layer is higher than the environmental stress crack resistance characteristic value of the outer layer, and the ratio of the inner layer thickness to the outer layer thickness is 3:97 to 30:70 A multi-layer blow container for a liquid agent containing a surfactant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14103891A JPH0741908B2 (en) | 1991-05-16 | 1991-05-16 | Multi-layer blow container for liquid agent containing surfactant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14103891A JPH0741908B2 (en) | 1991-05-16 | 1991-05-16 | Multi-layer blow container for liquid agent containing surfactant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06211227A JPH06211227A (en) | 1994-08-02 |
| JPH0741908B2 true JPH0741908B2 (en) | 1995-05-10 |
Family
ID=15282794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14103891A Expired - Lifetime JPH0741908B2 (en) | 1991-05-16 | 1991-05-16 | Multi-layer blow container for liquid agent containing surfactant |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0741908B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1300240A1 (en) * | 2001-10-02 | 2003-04-09 | Atofina Research S.A. | High ESCR glossy plastic containers |
| JP4128174B2 (en) * | 2004-12-07 | 2008-07-30 | 花王株式会社 | Composite container |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5361478A (en) * | 1976-11-10 | 1978-06-01 | Nitsusan Jiyushi Kk | Container for packaging atricultural chemicals |
| JPS5361479A (en) * | 1976-11-13 | 1978-06-01 | Nitsusan Jiyushi Kk | Packaging container for plastic agricultural medicine |
| JPS6034461B2 (en) * | 1978-02-27 | 1985-08-08 | 三菱化学株式会社 | Method for manufacturing multilayer blow container |
| JPS54146183A (en) * | 1978-05-09 | 1979-11-15 | Nitsusan Jiyushi Kk | Package for agricultural chemicals |
| JPS55142650A (en) * | 1979-04-23 | 1980-11-07 | Toppan Printing Co Ltd | Multilayer vessel |
-
1991
- 1991-05-16 JP JP14103891A patent/JPH0741908B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06211227A (en) | 1994-08-02 |
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