JPH0685316B2 - Acid resistant injection molded container - Google Patents

Acid resistant injection molded container

Info

Publication number
JPH0685316B2
JPH0685316B2 JP61105139A JP10513986A JPH0685316B2 JP H0685316 B2 JPH0685316 B2 JP H0685316B2 JP 61105139 A JP61105139 A JP 61105139A JP 10513986 A JP10513986 A JP 10513986A JP H0685316 B2 JPH0685316 B2 JP H0685316B2
Authority
JP
Japan
Prior art keywords
weight
injection
ethylene
molding
acid
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
Application number
JP61105139A
Other languages
Japanese (ja)
Other versions
JPS62262364A (en
Inventor
貞夫 斉藤
良一 伊藤
勝 井上
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Petrochemical Co Ltd
Original Assignee
Mitsubishi Petrochemical Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Petrochemical Co Ltd filed Critical Mitsubishi Petrochemical Co Ltd
Priority to JP61105139A priority Critical patent/JPH0685316B2/en
Publication of JPS62262364A publication Critical patent/JPS62262364A/en
Publication of JPH0685316B2 publication Critical patent/JPH0685316B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10Primary casings, jackets or wrappings of a single cell or a single battery
    • H01M50/116Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
    • H01M50/121Organic material
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10Primary casings, jackets or wrappings of a single cell or a single battery
    • H01M50/116Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
    • H01M50/117Inorganic material
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10Primary casings, jackets or wrappings of a single cell or a single battery
    • H01M50/116Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
    • H01M50/122Composite material consisting of a mixture of organic and inorganic materials
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10Primary casings, jackets or wrappings of a single cell or a single battery
    • H01M50/116Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material
    • H01M50/124Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material having a layered structure
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10Primary casings, jackets or wrappings of a single cell or a single battery
    • H01M50/131Primary casings, jackets or wrappings of a single cell or a single battery characterised by physical properties, e.g. gas-permeability or size
    • H01M50/133Thickness
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10Primary casings, jackets or wrappings of a single cell or a single battery
    • H01M50/14Primary casings, jackets or wrappings of a single cell or a single battery for protecting against damage caused by external factors
    • H01M50/145Primary casings, jackets or wrappings of a single cell or a single battery for protecting against damage caused by external factors for protecting against corrosion
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Description

【発明の詳細な説明】 [産業上の利用分野] 本発明は特定組成からなる耐酸性射出成形容器に関し、
特に日本工業規格JIS−C2335で第2類に分類される大型
電そうの要求性能を満足し、かつ、生産性の著しく改善
された鉛蓄電池用大型電そうに関するものである。
DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an acid-resistant injection-molded container having a specific composition,
In particular, the present invention relates to a large-sized electrolytic cell for a lead storage battery which satisfies the required performance of a large-sized electrolytic cell classified into the second class according to Japanese Industrial Standard JIS-C2335 and has remarkably improved productivity.

[従来の技術] 鉛蓄電池用の大型電そうには、現在、その材料としてエ
ボナイトが独占的に使用されている。エボナイトは耐酸
性、耐熱性、耐クリープ性、水密性に優れ、JIS−C2335
の規定する電そうの外観、耐電性、耐衝撃性、耐熱性、
不純物の全項目を満たしている。
[Prior Art] Currently, ebonite is exclusively used as a material for a large battery for a lead storage battery. Ebonite has excellent acid resistance, heat resistance, creep resistance, and watertightness, and JIS-C2335
The appearance, electric resistance, shock resistance, heat resistance,
All the items of impurities are satisfied.

また、エボナイトは高い弾性率(約40000kg/cm2)を有
しているため、大型電そうの壁面に加わる電解液(希硫
酸)の大きな液圧による変形が抑えられる。
Further, since ebonite has a high elastic modulus (about 40,000 kg / cm 2 ), deformation of the electrolytic solution (dilute sulfuric acid) applied to the wall surface of a large electrolysis cell due to a large hydraulic pressure can be suppressed.

[発明が解決しようとする問題点] しかしながら、エボナイトはその密度が大きく重いうえ
に、加硫工程を伴なう圧縮成形により製造されるため、
大型電そうの成形サイクルが4〜5時間にもなり、生産
性が極めて低いという欠点を有する。
[Problems to be Solved by the Invention] However, since ebonite has a large density and is heavy, and is produced by compression molding accompanied by a vulcanization step,
The molding cycle for a large-sized cell is 4 to 5 hours, which has a drawback of extremely low productivity.

そこで、本発明者らは、エボナイトに代えて、成形性に
優れるポリオレフィンの使用を検討し、次のことを見い
出した。
Therefore, the present inventors examined the use of polyolefin having excellent moldability in place of ebonite, and found the following.

(1)大型電そうは寸法が著しく大きいので、その成形
には回転成形が射出成形が適するが、電解液圧による変
形防止のため肉厚の製品にしなければならないため、回
転成形ではその成形サイクルが約2時間を要する。これ
に対し射出成形を用いた場合には約30分であり、この点
で射出成形の方が優れる。
(1) Since the size of a large battery is remarkably large, injection molding is suitable for its molding, but a thick product must be used to prevent deformation due to electrolytic solution pressure. Takes about 2 hours. On the other hand, when injection molding is used, it takes about 30 minutes, and injection molding is superior in this respect.

(2)しかしながら、射出成形で大型電そうを成形しよ
うとすると、製品が著しく大きいため、成形機の型締め
力を大きくする必要があり、かつ、射出樹脂容量が非常
に大きくなることから、成形機本体が超大型となり、成
形機の基礎や金型冷却装置等の付帯設備が大規模となっ
てしまう結果、工業生産ベースに乗らないものとなって
しまう。従って、型締め力、射出樹脂容量ともに大きく
しない工夫を要する。
(2) However, when a large battery is to be molded by injection molding, the product is extremely large, so it is necessary to increase the mold clamping force of the molding machine, and the injection resin capacity is also very large. The main body of the machine becomes extremely large, and as a result, the foundation of the molding machine and the auxiliary equipment such as the mold cooling device become large in scale, and as a result, the industrial production base cannot be used. Therefore, it is necessary to devise not to increase the mold clamping force and the injection resin capacity.

(3)一般の自動車用鉛電池の電そうに使用されている
ポリプロピレンは、大型電そうに用いた場合には、耐熱
性が不足して実用性を失ってしまう。
(3) Polypropylene, which is used for the battery of general lead batteries for automobiles, lacks heat resistance and loses its practicality when used for a large battery.

[問題点を解決するための手段] 本発明は、上記の問題点を解決してJIS−C2335第2類の
大型電そうの性能を満足し、実用性の高い電そうを生産
性良好に製造するためには、特定成分からなる低発泡射
出成形体がこの目的を達成しうることを見い出したもの
である。
[Means for Solving Problems] The present invention solves the above problems and satisfies the performance of the JIS-C2335 type 2 large-sized electrolytic cell, and manufactures a highly practical electrolytic cell with good productivity. In order to achieve this, it has been found that a low-foaming injection-molded article composed of specific components can achieve this object.

即ち、本発明は、5〜40重量%の無機充填剤が均一に分
散された、エチレン含量 1〜20重量%の結晶性プロピ
レ・エチレン共重合体の射出発泡体からなり、発泡倍率
が1.05〜1.3であり、かつ、その表面層に1mm以上のスキ
ン層を有することを特徴とする耐酸性射出成形容器であ
る。
That is, the present invention comprises an injection foam of a crystalline propylene / ethylene copolymer having an ethylene content of 1 to 20% by weight, in which an inorganic filler of 5 to 40% by weight is uniformly dispersed, and an expansion ratio of 1.05 to An acid-resistant injection-molded container having a thickness of 1.3 and having a skin layer of 1 mm or more on its surface layer.

本発明で用いられる樹脂は、エチレン含量1〜20重量%
の結晶性プロピレン・エチレン共重合体であり、チーグ
ラー・ナッタ触媒で重合されるブロックまたはランダム
共重合体である。
The resin used in the present invention has an ethylene content of 1 to 20% by weight.
Is a crystalline propylene / ethylene copolymer, which is a block or random copolymer polymerized with a Ziegler-Natta catalyst.

本発明で用いられる上記結晶性プロピレン・エチレン共
重合体には、プロピレンとエチレンのみではなく、ブテ
ン、4−メチルペンテン、ヘキセン、オクテン等のα−
オレフィンやアクリル酸、無水マレイン酸等の不飽和カ
ルボン酸またはその誘導体を5モル%以下共重合(グラ
フトも含む)したものであってもよい。
The crystalline propylene / ethylene copolymer used in the present invention includes not only propylene and ethylene but also α-such as butene, 4-methylpentene, hexene and octene.
It may be one obtained by copolymerizing (including grafting) 5 mol% or less of an unsaturated carboxylic acid such as olefin, acrylic acid or maleic anhydride, or a derivative thereof.

共重合体中のエチレン含量が1重量%未満では、電そう
製品の四隅での亀裂の発生という問題を生じやすく、か
つ、耐衝撃性も充分でない。また、エチレン含量が20重
量%超過では、耐熱性が低下す。好ましいエチレン含量
は3〜15重量%である。
If the ethylene content in the copolymer is less than 1% by weight, the problem of cracks at the four corners of the electrolytic product tends to occur, and the impact resistance is insufficient. If the ethylene content exceeds 20% by weight, the heat resistance will decrease. The preferred ethylene content is 3 to 15% by weight.

この重合体の流れ性は、メルトフローレート(MFR)が
5〜40g/10分、特に10〜30g/10分であることが、成形
性、表面平滑性、スキン層形成性の点から好ましい。
Regarding the flowability of the polymer, it is preferable that the melt flow rate (MFR) is 5 to 40 g / 10 minutes, particularly 10 to 30 g / 10 minutes from the viewpoint of moldability, surface smoothness and skin layer formability.

本発明で用いられる無機充填剤は、カーボンブラック、
金属炭酸塩(炭酸カルシウム、炭酸マグネシウム等)ケ
イ酸またはその塩鉱物(カオリンクレー、パイロフィラ
イト、タルク、セリサイト、焼成クレー、アスベスト、
マイカ、ベントナイト、ケイ酸カルシウム、ゼオライ
ト、ガラス繊維、ケイ砂、ケイ石粉等)、金属硫酸塩
(硫酸バリウム、硫酸カルシウム等)、アルミナ水和物
(ジプサイト、ベーマイト等)、金属粉など一般のもの
を用いることができるが、成形体の表面平滑性および耐
酸性の点から、ケイ酸またはその塩鉱物が好ましい。な
かでもタルク、マイカ、ガラス繊維が好ましく、特に液
相沈降式光透過法で測定した平均粒径0.5〜10μmのタ
ルクが著効を示す。
The inorganic filler used in the present invention is carbon black,
Metal carbonates (calcium carbonate, magnesium carbonate, etc.) Silicic acid or its salt minerals (kaolin clay, pyrophyllite, talc, sericite, calcined clay, asbestos,
Mica, bentonite, calcium silicate, zeolite, glass fiber, silica sand, silica stone powder, etc., metal sulfates (barium sulfate, calcium sulfate, etc.), alumina hydrates (gypsite, boehmite, etc.), metal powders, etc. However, silicic acid or a salt mineral thereof is preferable from the viewpoints of surface smoothness and acid resistance of the molded product. Among them, talc, mica, and glass fiber are preferable, and talc having an average particle size of 0.5 to 10 μm measured by a liquid phase sedimentation type light transmission method exhibits a remarkable effect.

この無機充填剤の使用量は、これと上記結晶性プロピレ
ン・エチレン共重合体との合計量に対し5〜40重量%、
好ましくは5〜30重量%、特に好ましくは15〜25重量%
の範囲である。
The amount of the inorganic filler used is 5 to 40% by weight based on the total amount of the inorganic filler and the crystalline propylene / ethylene copolymer,
Preferably 5 to 30% by weight, particularly preferably 15 to 25% by weight
Is the range.

充填剤の使用量が5重量%未満では耐熱性、寸法安定性
が不足し、また、40重量%超過では成形性、耐衝撃性が
不良となり、いずれも実用性ある電そうとならない。こ
れら無機充填剤は2種以上を併用することができる。
If the amount of the filler used is less than 5% by weight, heat resistance and dimensional stability will be insufficient, and if it exceeds 40% by weight, moldability and impact resistance will be poor, and neither will be practical. Two or more of these inorganic fillers can be used in combination.

さらに、本発明の耐酸性射出成形容器では、その成形に
際して発泡剤が用いられる。発泡剤は化学発泡剤と物理
発泡剤のいずれも使用しうるが、発泡気泡の均一性、微
細性、スキン層の形成性、表面平滑性等から、化学発泡
剤、特にアゾジカルボンアミドまたはアゾジカルボンア
ミドと炭酸塩(重炭酸ソーダ等)や有機酸類(クエン酸
モノナトリウム等)との混合系が好ましい。特にこの混
合系の発泡剤を用いたときは、スキン層を厚くする点に
著効を示す。この発泡剤の使用量は、製品の発泡倍率が
1.05〜1.3、好ましくは1.05〜1.1の低発泡となる範囲で
ある。
Furthermore, in the acid-resistant injection-molded container of the present invention, a foaming agent is used in the molding. As the foaming agent, both a chemical foaming agent and a physical foaming agent can be used. However, due to the uniformity of the foamed cells, the fineness, the skin layer forming property, the surface smoothness, etc., the chemical foaming agent, particularly azodicarbonamide or azodicarbonate. A mixed system of an amide and a carbonate (sodium bicarbonate, etc.) or an organic acid (monosodium citrate, etc.) is preferable. In particular, when this mixed-type foaming agent is used, it is significantly effective in thickening the skin layer. The amount of foaming agent used depends on the expansion ratio of the product.
It is in the range of low foaming of 1.05 to 1.3, preferably 1.05 to 1.1.

低発泡とすることにより、大型電そうの要求性能、殊に
機械的強度を満足させることと、射出樹脂容量および型
締め力を小さく抑えて成形機が超大型とならないように
することを両立させることができる。
Low foaming satisfies both performance requirements, especially mechanical strength, required for large electrolysis cells, while keeping injection resin capacity and mold clamping force small to prevent the molding machine from becoming super large. be able to.

本発明では、これらの成分のほかに付加的成分を、本発
明の効果を著しく損なわない範囲で、例えば30重量%以
下で配合することができる。このような付加的成分とし
ては、例えばプロピレン単独重合体、プロピレン・ブテ
ン共重合体等の本発明で用いる以外のプロピレン系重合
体、低、中または高密度のポリエチレンン、エチレン・
酢酸ビニル共重合体、エチレン・アクリル酸共重合体、
エチレン・アクリル酸エチル共重合体、エチレン・アク
リル酸金属塩共重合体、エチレン・ブテン共重合体等の
エチレン系重合体(樹脂状、ゴム状)、その他、顔料、
染料、酸化防止剤、紫外線吸収剤、耐候剤、腐食防止
剤、分子量調整剤、発泡助剤等がある。
In the present invention, in addition to these components, additional components may be added in an amount not exceeding the effect of the present invention, for example, 30% by weight or less. Examples of such additional components include propylene homopolymers, propylene-based polymers other than those used in the present invention such as propylene-butene copolymers, low-, medium- or high-density polyethylene, ethylene
Vinyl acetate copolymer, ethylene / acrylic acid copolymer,
Ethylene / ethyl acrylate copolymers, ethylene / acrylic acid metal salt copolymers, ethylene / butene copolymers, and other ethylene-based polymers (resin-like or rubber-like), others, pigments,
There are dyes, antioxidants, ultraviolet absorbers, weathering agents, corrosion inhibitors, molecular weight regulators, foaming aids and the like.

本発明の耐酸性射出成形容器は、上記の各成分を混合混
練し、大型射出成形機により成形される。成形条件は常
法により適宜選択される。
The acid-resistant injection-molded container of the present invention is formed by mixing and kneading the above-mentioned components and using a large-sized injection molding machine. The molding conditions are appropriately selected by a conventional method.

製造された容器は、無機充填剤が均一に分散された樹脂
の低発泡体である。発泡倍率が1.05未満のものは成形機
の規模の効果がないばかりか、ヒケの防止が発現しな
い。また、1.3超過のものは、機械的強度の不足、流動
不足および二次発泡の問題が起こる。
The produced container is a low foam of resin in which the inorganic filler is uniformly dispersed. If the expansion ratio is less than 1.05, not only is there no effect on the scale of the molding machine, but the prevention of sink marks does not appear. On the other hand, if it exceeds 1.3, problems of insufficient mechanical strength, insufficient flow and secondary foaming occur.

この射出成形容器は表面層に1mm以上のスキン層を有す
るように発泡剤、射出条件および冷却条件を選択して成
形されるべきものである。スキン層が1mm未満のもの
は、運搬時や使用時に衝撃により表面層が破壊して電解
液が流出するおそれに対処することができない。
This injection molded container should be molded by selecting the foaming agent, injection conditions and cooling conditions so that the surface layer has a skin layer of 1 mm or more. If the skin layer has a thickness of less than 1 mm, it is impossible to deal with the risk that the surface layer will be broken due to impact during transportation or use and the electrolyte may flow out.

[実施例] 実施例1および比較例1 MFR20g/10分のプロピレン単独重合体に平均粒径2.5ミク
ロンのタルクを20重量%添加したポリプロピレン組成物
とMFR30g/10分、エチレン含量3.5重量%のプロピレン・
エチレンブロック共重合体に平均粒径2.5μmのタルク
を20重量%添加したプロピレン・エチレン共重合体組成
物を用いて、それぞれ発泡倍率1.05で射出低発泡体電そ
うを成形した。
Example 1 and Comparative Example 1 A polypropylene composition obtained by adding 20% by weight of talc having an average particle size of 2.5 microns to a propylene homopolymer having an MFR of 20 g / 10 min and MFR of 30 g / 10 min and propylene having an ethylene content of 3.5% by weight.・
Using a propylene / ethylene copolymer composition prepared by adding 20% by weight of talc having an average particle size of 2.5 μm to an ethylene block copolymer, injection-foamed low-foam cells were molded at an expansion ratio of 1.05.

成形に用いた電そうの外寸法は縦×横×高=460×430×
993(mm)で肉厚20mmであった。
The outer dimensions of the battery used for molding are vertical x horizontal x high = 460 x 430 x
The thickness was 993 (mm) and the wall thickness was 20 mm.

成形は、上記各組成物100重量部にアゾジカルボンアミ
ド0.15重量部および重炭酸ソーダとクエン酸モノナトリ
ウムの混合発泡剤0.15重量部をドライブレンドした後、
樹脂アキュムレーターの温度240℃にて射出発泡成形
後、20分間冷却し、製品を取り出す順序で行った。
Molding, after dry blending 0.15 parts by weight of azodicarbonamide 0.15 parts by weight and 0.15 parts by weight of a mixed blowing agent of sodium bicarbonate and monosodium citrate in 100 parts by weight of each composition described above,
After injection foam molding at a resin accumulator temperature of 240 ° C., cooling was performed for 20 minutes, and the product was taken out in the order.

プロピレン単独重合体組成物の材料では成形電そうの四
隅に亀裂が発生し、電池性能を満足する製品を得ること
ができなかった。一方、プロピレン・エチレンブロック
共重合体組成物の材料では四隅に亀裂が発生せず、表面
に最小2.3mmのスキン層と均一微細の気泡を有した良好
な製品を得る事ができた。なお、上記のプロピレン・エ
チレンブロック共重合体についてタルク配合物およびタ
ルクを配合しない物について、JIS−C2335規定の第2類
電そうの耐電圧、耐衝撃性、耐酸性および不純物の試験
を行った。その結果を第1表に示す。耐熱性については
長側面の高さ400mmでの最大変形量を測定した。
With the material of the propylene homopolymer composition, cracks occurred at the four corners of the molding cell, and a product satisfying the battery performance could not be obtained. On the other hand, with the material of the propylene / ethylene block copolymer composition, a good product having a skin layer of minimum 2.3 mm and uniform fine bubbles on the surface without cracks at the four corners could be obtained. With respect to the above-mentioned propylene / ethylene block copolymer, talc blends and non-blended talc blends were tested for withstand voltage, impact resistance, acid resistance and impurities of JIS C 2335 stipulated second class battery. . The results are shown in Table 1. Regarding heat resistance, the maximum amount of deformation was measured at a height of 400 mm on the long side.

実施例2 実施例1において、発泡剤をアゾジカーボンアミド0.17
重量部および重炭酸ソーダとクエン酸モノナトリウムの
混合発泡剤0.17重量部に変えたほかは実施例1と同様に
して、発泡倍率1.10および表面のスキン層最小厚み1.95
mmの射出低発泡体電そうを成形した。その成形外観、バ
ッテリー液を満たしたヒートサイクルテスト(−40℃で
24時間と80℃で24時間の間で10サイクルのテスト)およ
びJIS−C2335規定の耐衝撃性試験の評価を行なった。結
果は第2表に示す。
Example 2 In Example 1, the blowing agent was azodicarbonamide 0.17.
Parts by weight and a foaming agent of sodium bicarbonate and monosodium citrate 0.17 parts by weight except that the amount of foaming agent was changed to 0.17 parts by weight and the expansion ratio was 1.10 and the minimum skin layer thickness was 1.95.
mm injection molded low foam cell. Its molding appearance, heat cycle test filled with battery fluid (at -40 ℃
The test was conducted for 10 cycles between 24 hours and 24 hours at 80 ° C), and the impact resistance test of JIS-C2335 was evaluated. The results are shown in Table 2.

比較例2〜4 実施例1において、発泡剤をアゾジカーボンアミド0.08
重量部および重炭酸ソーダとクエン酸モノナトリウムの
混合発泡剤0.08重量部に変えたほかは実施例1と同様に
して、発泡倍率1.01および表面のスキン層最小厚み2.6m
mの射出低発泡体電そう(比較例2)、発泡剤をアゾジ
カーボンアミド0.10重量部および重炭酸ソーダとクエン
酸モノナトリウムの混合発泡剤0.15重量部に変えたほか
は実施例1と同様にして、発泡倍率1.32および表面のス
キン層最小厚み1.4mmの射出低発泡体電そう(比較例
3)、および、発泡剤をアゾジカーボンアミド0.5重量
部および重炭酸ソーダとクエン酸モノナトリウムの混合
発泡剤0.10重量部に変えたほかは実施例1と同様にし
て、発泡倍率1.30および表面のスキン層最小厚み0.6mm
の射出低発泡体電そう(比較例4)をそれぞれ成形し
た。それらの成形外観、ヒートサイクルテストおよびJI
S−C2335規定の耐衝撃性試験の評価結果を第2表に示
す。
Comparative Examples 2 to 4 In Example 1, the blowing agent was azodicarbonamide 0.08.
Parts by weight and a foaming agent mixed with sodium bicarbonate and monosodium citrate 0.08 parts by weight in the same manner as in Example 1 except that the expansion ratio was 1.01 and the minimum skin layer thickness was 2.6 m.
m Injected low-foam electrolyzer (Comparative Example 2), the same as in Example 1 except that the blowing agent was changed to 0.10 part by weight of azodicarbonamide and 0.15 part by weight of a mixed blowing agent of sodium bicarbonate and monosodium citrate. , An injection low-foam electrolyzer having a foaming ratio of 1.32 and a skin layer minimum thickness of 1.4 mm on the surface (Comparative Example 3), and 0.5 parts by weight of azodicarbonamide as a foaming agent and 0.10 of a mixture of sodium bicarbonate and monosodium citrate as a foaming agent. Same as Example 1 except changing to parts by weight, expansion ratio 1.30 and minimum skin layer thickness of 0.6 mm
Injection-molded low-foam cell (Comparative Example 4) was molded. Their molding appearance, heat cycle test and JI
Table 2 shows the evaluation results of the impact resistance test specified by S-C2335.

[作用および効果] 本発明の耐酸性射出成形容器は、特定のプロピレン・エ
チレン共重合体に充填剤を配合し、表面にスキン層を設
けて低発泡成形したことにより、JIS規格の大型電そう
に適合すると共に、従来のエボナイト製に比して、軽量
であり、かつ、射出成形によって容易に高い生産性で成
形することができる。また、低発泡の採用によって射出
樹脂容量および型締め力を小さく抑えて成形機の大型化 を制限できた。
[Operations and Effects] The acid-resistant injection-molded container of the present invention is a large-sized battery of JIS standard, which is obtained by blending a specific propylene / ethylene copolymer with a filler and forming a skin layer on the surface of the container for low foam molding. It is lighter than conventional ebonite products, and can be easily molded by injection molding with high productivity. In addition, the use of low foam reduces the injection resin capacity and mold clamping force to a small size, thus increasing the size of the molding machine. Could be restricted.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】5〜40重量%の無機充填剤が均一に分散さ
れた、エチレン含量1〜20重量%の結晶性プロピレン・
エチレン共重合体の射出発泡体からなり、発泡倍率が1.
05〜1.3であり、かつ、その表面層に1mm以上のスキン層
を有することを特徴とする耐酸性射出成形容器。
1. A crystalline propylene having an ethylene content of 1 to 20% by weight in which 5 to 40% by weight of an inorganic filler is uniformly dispersed.
It consists of injection foam of ethylene copolymer, and the expansion ratio is 1.
An acid-resistant injection-molded container having a thickness of 05 to 1.3 and having a skin layer of 1 mm or more on its surface layer.
JP61105139A 1986-05-08 1986-05-08 Acid resistant injection molded container Expired - Lifetime JPH0685316B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61105139A JPH0685316B2 (en) 1986-05-08 1986-05-08 Acid resistant injection molded container

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61105139A JPH0685316B2 (en) 1986-05-08 1986-05-08 Acid resistant injection molded container

Publications (2)

Publication Number Publication Date
JPS62262364A JPS62262364A (en) 1987-11-14
JPH0685316B2 true JPH0685316B2 (en) 1994-10-26

Family

ID=14399418

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61105139A Expired - Lifetime JPH0685316B2 (en) 1986-05-08 1986-05-08 Acid resistant injection molded container

Country Status (1)

Country Link
JP (1) JPH0685316B2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09167601A (en) * 1995-12-14 1997-06-24 Japan Storage Battery Co Ltd Negative electrode absorbing type lead-acid battery
JP2000511343A (en) * 1996-05-28 2000-08-29 ギツト/グローバル・コーポレーシヨン Flame retardant battery casing
WO2014106103A1 (en) * 2012-12-28 2014-07-03 Johnson Controls Technology Company Polymerized lithium ion battery cells and modules with thermal management features

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58115753A (en) * 1981-12-28 1983-07-09 Ube Ind Ltd Battery case

Also Published As

Publication number Publication date
JPS62262364A (en) 1987-11-14

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