CN1274492C - 用于储存和运输化学制品的多层容器 - Google Patents
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Abstract
本发明提供一种用于储存和运输化学品,特别是储运电子工业所用的高纯度液态化学品的容器。这种容器用共挤出法由热塑性塑料制成。该容器在内容物一侧的最内层由不含稳定剂的高密度聚乙烯(HDPE)制成。本发明涉及用具有至少一个内挤出机和一个外挤出机的多层吹挤出机制造用于储存和运输化学品(特别是电子工业所用的高纯液态化学品)的多层容器的方法。该方法包括如下步骤:a)将可挤出的聚合物或共聚物加入外挤出机,并将不含稳定剂的HDPE加入内挤出机;b)塑化外挤出机中的聚合物或共聚物和内挤出机中的不含稳定剂的HDPE;c)把外挤出机中的塑化聚合物或共聚物和内挤出机中的不含稳定剂的塑化HDPE共挤入成形装置;d)在成形容器中成形用于储存和运输化学品的容器。
Description
本发明涉及用于储存和运输化学制品的多层容器(vorrichtung),特别是用于储存和运输电子工业上高纯度液态化学品的多层容器。
在制造电子元件时,通常需要高纯度的液态化学品。特别是制造大规模集成微型芯片时,需要高的纯度。一般来说,近年来对液态特种化学品(例如用于电子工业的工艺助剂)的纯度要求越来越高。不仅要求能生产所需纯度的化学品,而且还必须确保在运输、储存和使用过程中不使化学品受到污染。因此,还必须确保储存和运输的安全,因为有些化学品是有腐蚀性的,甚至有毒性的。故必须最大限度地排除例如由于运输容器的损坏或密封不佳引起的化学品意外泄漏。
因此,在选择这类容器的材料时,必须考虑两个因素。第一,选择时必须考虑排除被与运输或储存化学品接触的容器壁材料的任何污染。除了避免所运化学品的污染和考虑耐所运化学品浸渍的寿命外,这种容器还得有足够的刚性和一定的弹性,从而使这种容器能耐压和耐冲击,且既不变形,也不会开裂。另外,这种容器的容量宜较大,它的制造既快又简单。
由DE19628643可知,某些聚乙烯(特别是不含稳定剂的高密度聚乙烯)很适用于制造电子工业上所用高纯化学品的储存和运输容器。符合要求的是比重为0.970克/厘米3,最好为0.942-0.961克/厘米3的高密度聚乙烯。属于这一类高密度聚乙烯的有以商品名Lupolen销售的特种聚乙烯,其中有Lupolen6021D、Lupolen5021D、Lupolen4261AQ149和Lupolen4261AQ135。根据上述现有技术,通过焊接由上述材料构成的板料来制造相应的容器。由于需要焊接相应的挤出板材,这种容器的制造方法费时费钱。另外,由于焊接和焊接时产生的焊缝,不能令人满意地保证Lupolen6021D达到质量要求的性能。另一方面,至今还不能用吹塑法制造出容积例如为200升的单层挤吹运输容器,或制得的容器不符合危险品包装材料检测时的机械要求。
本发明要解决的一个问题是,提供一种用于储存和运输化学品(特别是电子工业用高纯液态化学品)的容器和相应的制造方法。这种容器符合上述要求,而且制造方法简单和迅速。
上述的问题由权利要求1中所述的容器和权利要求15中所述的方法加以解决。其详细的实施方式和优点记载在从属权利要求中。
本发明提供一种用于储存和运输化学品(特别是电子工业用的高纯度液态化学品)的容器。这种容器用共挤出法制造和由热塑性塑料构成。该容器在内容物一侧的最内层由不含稳定剂的高密度聚乙烯(HDPE)制成。在本发明中,不含稳定剂的HDPE是指不用任何常见稳定剂制得的HDPE。常见的稳定剂,系指本领域中熟练技术人员已知的抗氧剂(例如参见“塑料(Kunststoffe)”78(2),142(1988)等刊物)。
不含稳定剂的HDPE较好是比重为0.940-0.970克/厘米3,较好在0.942-0.961克/厘米3,更好为0.946-0.960克/厘米3的聚乙烯。这种聚乙烯与高纯液态化学品接触时释放出极少量的粒状污染物。
在另一个特别优选的实施方式中,不含稳定剂的HDPE是比重为0.940-0.970克/厘米3,较好为0.942-0.961克/厘米3,更好为0.946-0.960克/厘米3的聚乙烯。这种聚乙烯在与碱性、中性和酸性高纯化学品接触时至少释放出如下离子态杂质中的一种:
Al≤60毫微克/克,
Ca≤60毫微克/克,
Fe≤63毫微克/克,
Mg≤16毫微克/克,
Ti≤4毫微克/克,
Zn≤6毫微克/克,
Mn≤0.3毫微克/克,
Cu≤1.5毫微克/克。
不含稳定剂的HDPE的另一个特点是它的催化剂残留物含量低,这使得此类材料与碱性和酸性高纯化学品接触时释放出特别少的离子杂质。另外,储存或运输的化学品与此类材料相互作用产生的颗粒量也较少。颗粒含量最好保持如下比例:
颗粒的粒径≤0.5微米:含量≤5/毫升液体,
颗粒的粒径≤0.2微米:含量≤50/毫升液体,
颗粒的粒径≤0.1微米:含量≤500/毫升液体。
特别优选使用以商品名Lupolen6021D或Lupolen4261AQ149销售的HDPE产品,采用这类材料就能确保高纯化学品的纯度。此外,这种材料还具有良好的可挤压性。
为了解决上述问题,本发明选择多层吹挤或共挤出方法来制造用于储存或运输高纯化学品的容器。按照本发明,将不含稳定剂、机械强度低的高纯度HDPE层用在与内容物接触的一侧,而外层材料则采用一种可任意选择的常见的可挤出的材料。多层吹挤法可以在连续的生产工艺中制造本发明的容器。因此,与至今使用的焊接法相比,可节省相当多的成本和时间。另外,由于本发明的容器是整体制造的,没有焊缝或类似的薄弱点,所以它比传统的容器更耐压、更抗冲击。在共挤出时,将多层熔融聚合物叠放在挤出模头中,并相互结合。这种多层模头具有多个熔融物入口和一个共用的出口通道。
在最内层和其它层使用不同的材料时,最好在各层之间挤入粘结剂层,从而在各层之间产生机械性能稳定的永久性的粘结,并且使制成的容器在受压力、冲击和其它外部机械作用力时仍能坚固耐用。本发明的容器以2-5层的结构为佳。从内到外的各层最好依次由如下材料制作:HDPE-粘结剂-聚酰胺或EVOH-粘接剂-任选的可挤出聚乙烯。最内层最好占该容器壁厚的10-20%,最外层最好占该容器壁厚的50-80%,三个中间层占总壁厚的10-30%。
本发明容器的至少另一层(最好是最外层)宜采用可挤出的聚合物或共聚物制成,较好由比重为0.940-0.970克/厘米3,较好为0.942-0.961克/厘米3,最好为0.946-0.960克/厘米3的HDPE制成。
在一个优选的实施方式中,最外层含有至少一种HDPE。这些HDPE选自Lupolen5261D、Lupolen4261AQ135、HostalenGM6255、Fina56020、Borealis8214、Stamylan7731、Stamylan7890和DaplenAH5493或上述两种或多种HDPE的混合物。
在另一个优选的实施方式中,最外层还可含有能使该层能抗紫外线的颜料。因此,特别在运输过程中,保护该容器免受入射光线的任何损害。最外层还能保持其机械稳定性。所用的颜料以炭黑为好,也可以是石英、常用的母料和其它常用的颜料,如铜酞菁或TiO2,还可以使用有机紫外稳定剂和联苯化合物。
在另一个优选的实施方式中,最外层是导电的。由于可以导出表面出现的所有电荷,所以可以避免产生电火花。因此,与周围环境相比,在容器表面一般不会出现静电荷。静电荷的主要危险是由火源和易爆(易燃)混合物相遇时发生的,而上述容器中运输的化学品就是属于这类易爆(易燃)混合物。电荷是由于机械分离(如固体物质摩擦或倾倒,液体物质流动或浇注),或静电感应引起的。因此,在选择最外层材料时,应使表面比电阻≤105Ω为好。这样,此类表面是永久性抗静电的。这是本发明容器可用于爆炸危险区的原因。所用的材料较好是以商品名HostalenGM 9350C black销售的HDPE。
在本发明的另一个实施方式中,最外层用玻璃纤维或加入机械稳定性更好的材料(如聚合物)进行增强,以提高本发明的容器抗压力、抗掉落和抗冲击的强度。为了能提高强度,较好在最外层中加入聚酰胺薄片,从而可加工成如品名为“Selar”一类的聚乙烯复合材料。
在另一个特别优选的实施方式中,该容器是双层的。最内层最好用Lupolen6021D或Lupolen4261AQ149制成,其厚度占壁厚的20-40%,而最外层占壁厚的60-80%。现已证明,这种结构是特别坚固的。
在本发明的另一个优选的实施方式中,该容器至少有三层,同时至少有一个中间层是由生产废料制成。这些废料是所谓的挤压余料。它们是本发明容器“成形”时在上端和下端切落的部分。
本发明的容器宜至少有一个孔,较好两个孔,且一个孔的直径最好为≤70毫米。预开的孔是用于安装潜管或旋塞堵头的。它们最好用如下一种或多种材料制成:HDPE、全氟烷氧基聚合物(PFA)、聚丙烯、PVdF和全氟乙烯-丙烯共聚物(FEP)。
本发明容器的另一个优选实施方式的容量一般≥5升,最好≥200升。采用多层吹挤法技术,可以简单、快速地、仅在一道工序中制造用于运输和储存高纯化学品的容器。这些容器符合安全要求。这意味着可以节省相当多的成本和时间。
另外,本发明涉及用包括至少一个内挤出机和一个外挤出机的多层吹挤出机制造用于储存和运输化学品(特别是电子工业所用的高纯液态化学品)的多层容器的方法。该方法至少包括如下步骤:
a)将可挤出的聚合物或共聚物装入外挤出机,将不含稳定剂的HDPE加入内挤出机;
b)塑化外挤出机中的聚合物或共聚物和内挤出机中的不含稳定剂的HDPE;
c)把外挤出机中的塑化聚合物或共聚物和内挤出机中的不含稳定剂的塑化HDPE共挤入成形装置;
d)在成形容器中成形用于储存和运输化学品的容器。
为了尽可能避免与氧气接触,挤出过程宜在惰性气体保护下进行。所用的惰性气体以氮气为佳。然而如果采用Lupolen6021D,则不需要惰性气体保护。操作温度高于被挤出材料的熔点,一般约在180-230℃为宜。
在本发明方法的一个优选实施方式中,外挤出机内的可挤出聚合物或共聚物中,应有一种是上面已列出的最外层材料可采用的聚合物,内挤出机中不含稳定剂的HDPE,应有一种是上面已列出的最内层材料可采用的HDPE。
用本发明方法,可以快速、方便地制造本发明的多层容器。制成一个完整的容器基本上仅需一个连续的工序,以后无需焊接预制的板材,因此在制成的容器上也没有焊缝。在制造过程中将不同材料层直接粘接在一起,可以使各层之间的粘结特别贴切和牢固。
另外,本发明涉及本发明的容器在储存和/或运输氨溶液方面的应用,特别是在储存和/或运输20-30%氨溶液方面的应用。
通过参照附图阅读如下对实施例的描述,可以了解到本发明的其它优点、特征和用途范围。
图1是由热塑性塑料制成的用于储存和运输化学品(特别是电子工业所用高纯液态化学品)的本发明容器的剖视图。
图1表示用于储存和运输化学品(特别是电子工业用高纯液态化学品)的本发明容器1的剖视图。容器1是圆桶形或桶形的。它的内层2优选采用Lupolen6021D制成,外层3优选采用HDPE制成。外层3的HDPE的比重宜为0.940-0.970克/厘米3,较好为0.942-0.961克/厘米3,更好为0.946-0.960克/厘米3。本发明容器的上部有两个孔4。这些孔是为插入管或旋塞预留的。孔的直径优选≤70毫米。在该容器的底部最好预制用于安装插入管的圆形凹槽。用插入管可以完全排空残余物料。外层最好选用一种用于保护内层免受紫外线损害的颜料。另外,最外层最好是导电的。为了使本发明容器达到最佳耐压强度,其器壁宜较厚。这对于安全储存和运输化学品来说是绝对必要的。对于12千克左右的容量来说,优选的壁厚为5毫米。对于14千克左右的容量来说,相应的壁厚为6毫米。在双层容器中,内层的厚度约占壁厚的20-40%,外层的厚度约占壁厚的60-80%。
Claims (10)
1.一种用包括至少一台内挤出机和一台外挤出机的多层吹挤出机制造用于储存和运输电子工业用高纯液态化学品的多层容器的方法,该方法包括如下步骤:
a)将可挤出的聚合物或共聚物加入外挤出机,并将不含稳定剂且催化剂残留物含量低的高密度聚乙烯加入内挤出机;
b)塑化外挤出机中的聚合物或共聚物和内挤出机中的不含稳定剂且催化剂残留物含量低的高密度聚乙烯;
c)把外挤出机中的塑化聚合物或共聚物和内挤出机中的不含稳定剂且催化剂残留物含量低的塑化高密度聚乙烯共挤入成形装置;
d)在成形容器中成形用于储存和运输化学品的容器。
2.如权利要求1所述的方法,其特征在于所述不含稳定剂且催化剂残留物含量低的高密度聚乙烯是比重为0.940-0.970克/厘米3的聚乙烯。
3.如权利要求1或2所述的方法,其特征在于所述不含稳定剂且催化剂残留物含量低的高密度聚乙烯是比重为0.940-0.970克/厘米3的聚乙烯,它在与化学品接触时至少释放出如下离子杂质中的一种:
Al≤60毫微克/克,
Ca≤60毫微克/克,
Fe≤63毫微克/克,
Mg≤16毫微克/克,
Ti≤4毫微克/克,
Zn≤6毫微克/克,
Mn≤0.3毫微克/克,
Cu≤1.5毫微克/克。
4.如上述权利要求中任一项所述的方法,其特征在于该容器的至少另一层由可挤出的聚合物或共聚物制成。
5.如权利要求4所述的方法,其特征在于器壁至少另一个层由高密度聚乙烯制成,所述高密度聚乙烯的比重为0.940-0.970克/厘米3的聚乙烯。
6.如上述权利要求中任一项所述的方法,其特征在于至少另一层含有至少一种高密度聚乙烯,该高密度聚乙烯选自Lupolen5261Z、Lupolen4261AQ135、HostalenGM6255、Fina56020、Borealis8214、Stamylan7731、Stamylan7890、DaplenAH5493或上述两种或多种高密度聚乙烯的混合物。
7.如上述权利要求中任一项所述的方法,其特征在于至少最外层含有紫外保护颜料。
8.如上述权利要求中任一项所述的方法,其特征在于最外层是导电的。
9.如上述权利要求中任一项所述的方法,其特征在于所述的容器是双层的,最内层的厚度占壁厚的20-40%,而最外层占壁厚的60-80%。
10.如权利要求1-8中任一项所述的方法,其特征在于所述的容器包含至少三层,至少有一个中间层含有生产废料。
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DE19905765A DE19905765A1 (de) | 1999-02-11 | 1999-02-11 | Mehrschichtige Vorrichtung zum Lagern und Transportieren von Chemikalien |
DE19905765.6 | 1999-02-11 |
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US (1) | US7378138B1 (zh) |
EP (1) | EP1159131B1 (zh) |
JP (1) | JP2002541026A (zh) |
CN (1) | CN1274492C (zh) |
AT (1) | ATE330790T1 (zh) |
AU (1) | AU2906100A (zh) |
DE (2) | DE19905765A1 (zh) |
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DE19905765A1 (de) | 1999-02-11 | 2000-08-31 | Riedel De Haen Gmbh | Mehrschichtige Vorrichtung zum Lagern und Transportieren von Chemikalien |
DE19924650A1 (de) * | 1999-05-28 | 2000-12-14 | Riedel De Haen Gmbh | Mehrschalige Vorrichtung zum Lagern und Transportieren von Chemikalien |
DE10242956B4 (de) * | 2002-09-17 | 2004-07-15 | Protechna S.A. | Transport- und Lagerbehälter für Flüssigkeiten und Verfahren zur Herstellung des Kunststoff-Innenbehälters des Transport- und Lagerbehälters |
DE10242954A1 (de) * | 2002-09-17 | 2004-03-25 | Protechna S.A. | Transport- und Lagerbehälter für Flüssigkeiten |
DE112007001225A5 (de) * | 2006-05-18 | 2009-04-23 | Mauser-Werke Gmbh | Mehrschichtiger Kunststoff-Behälter |
JP5467897B2 (ja) * | 2009-11-16 | 2014-04-09 | 積水成型工業株式会社 | 樹脂製容器 |
DE102011075998B3 (de) * | 2011-05-17 | 2012-11-15 | Simona Ag | Behälter, Rohr oder chemischer Apparat mit Farbindikator und Verbundhalbzeug mit Farbindikator zur Herstellung eines Behälters, Rohrs oder chemischen Apparats |
DE102012017402A1 (de) | 2012-09-03 | 2014-03-06 | Ekkehard Schneider | Transportvorrichtung für einen Behälter |
CN103964039B (zh) * | 2014-03-13 | 2016-06-01 | 无锡华瑛微电子技术有限公司 | 化学液存储瓶及其制造方法 |
US10196172B2 (en) * | 2014-03-13 | 2019-02-05 | Wuxi Huaying Microelectronics Technology Co., Ltd. | Chemical container and method for manufacturing the same |
CN103879620B (zh) * | 2014-03-13 | 2016-07-20 | 无锡华瑛微电子技术有限公司 | 化学液存储瓶及其制造方法 |
DE202015101689U1 (de) * | 2015-04-02 | 2016-01-20 | Flaco-Geräte GmbH | Tankanlage |
CN109094925A (zh) * | 2017-06-20 | 2018-12-28 | 瀚宇彩晶股份有限公司 | 液体盛装桶 |
CN114683595A (zh) * | 2020-12-28 | 2022-07-01 | 华景微纳科技(苏州)有限公司 | 一种废旧hdpe材料回收再利用制造容器的方法 |
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JPS6239444A (ja) * | 1985-08-12 | 1987-02-20 | 三菱化学株式会社 | 高純度薬品用ボトル |
JPH01208115A (ja) * | 1988-02-16 | 1989-08-22 | Mitsubishi Kasei Corp | 高純度薬品用の大型容器 |
DE4310641C1 (de) * | 1993-04-01 | 1994-01-13 | Basf Ag | Verwendung von stabilisatorfreiem Polyethylen hoher Dichte (PE-HD) zur Herstellung von Hohlkörpern |
DE9405113U1 (de) | 1994-03-25 | 1994-05-26 | Mauser-Werke GmbH, 50321 Brühl | Kunststoff-Behälter |
GB2288141A (en) * | 1994-04-08 | 1995-10-11 | Wiva Bv | Chemical vessels made from carbon-pigmented HPDE |
US5985388A (en) * | 1994-09-21 | 1999-11-16 | Showa Denko K.K. | Multi-layer transparent sealant film for laminating comprising high density polyethylene layer and packaging flim and pouch using the same |
US5671591A (en) | 1995-05-01 | 1997-09-30 | Ashland, Inc. | Integrated container moulding and filling facility |
DE19628643A1 (de) | 1996-07-16 | 1998-01-22 | Merck Patent Gmbh | Werkstoffe für die Herstellung von Transportbehältern |
DE19905765A1 (de) | 1999-02-11 | 2000-08-31 | Riedel De Haen Gmbh | Mehrschichtige Vorrichtung zum Lagern und Transportieren von Chemikalien |
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JP2002541026A (ja) | 2002-12-03 |
ATE330790T1 (de) | 2006-07-15 |
EP1159131A1 (de) | 2001-12-05 |
CN1346311A (zh) | 2002-04-24 |
US7378138B1 (en) | 2008-05-27 |
DE19905765A1 (de) | 2000-08-31 |
EP1159131B1 (de) | 2006-06-21 |
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