CN100430222C - 容器壁后成形加工 - Google Patents

容器壁后成形加工 Download PDF

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CN100430222C
CN100430222C CNB038032422A CN03803242A CN100430222C CN 100430222 C CN100430222 C CN 100430222C CN B038032422 A CNB038032422 A CN B038032422A CN 03803242 A CN03803242 A CN 03803242A CN 100430222 C CN100430222 C CN 100430222C
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separation layer
layer
microns
metal
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CN1628030A (zh
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A·赛尔拉诺
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Colgate Palmolive Co
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Abstract

具有隔离结构的管子容器，可以通过后成形加工技术来改变形状。该后成形加工包括将成形的和加热的管子放置在心轴上，且具有围绕的模子，该模子具有管子的最终需要的形状。然后，通过可选择地在模子上使用真空来通过心轴加压内部壁。管子壁的形状改变为不会对管子壁的隔离特性有害。

Description

容器壁后成形加工
技术领域
本发明涉及一种完工容器，其中，至少一部分的壁的结构的形状改变了。更具体的，本发明涉及一种管子容器，其中，在管子成形以后，改变管子容器的形状。
背景技术
在大多数情况下，容器在其制造时就给定其最终的形状。然而，在有些情况下，容器形状在其制造以后改变。这是要使容器设置有一些实用特征，或者提供一种装饰。已经发现，后成形加工技术对于给管子容器增加特征或者装饰很有用。
日本专利出版物56-20970披露了一种通过将管子放置在加热的心轴上，以及将管子壁吹成围绕的模子的形状来改变管子容器的形状的技术。这改变了管子壁。去除被加热的心轴，打开模子，取出具有改变的表面的管子。美国专利5756038披露了这种工艺的一种改进，其中，心轴具有凹槽，且在心轴上给出真空，和/或从围绕的模子吹出真空。管子壁采用心轴凹槽的形状。然后，将管子从心轴凹槽去除。这些是用于制造后成形加工的管子的有趣的工艺。然而，两种工艺没有考虑具有隔离层的管子壁。这样的隔离层是层压或者注吹模制的管子的一部分。在隔离层是用于诸如调料或者香料之类的有机物质的情况下，其为诸如铝层之类的金属层，或者诸如乙烯-乙烯醇(EVOH)层之类的有机层。在管子壁的形状的改变中，不使管子壁的隔离层破裂是重要的。
发明内容
一种将管子容器后成形加工成不同形状，且维持所述管子容器的隔离特性的方法，包括提供具有至少一个隔离层并且在所述隔离层的每个侧面上具有至少一个热塑性层的多层层压管子，所述隔离层可延长达到其长度的大约125％，且所述隔离层维持其隔离特性的至少大约90％。
所述隔离层是金属层。
所述金属是铝。
所述金属是铝合金。
所述金属是具有大约7微米到大约50微米厚度的金属膜。
每个热塑性层是聚烯烃。
所述聚烯烃选自包括聚乙烯和聚丙烯的组。
所述隔离层是有机隔离层。
所述有机隔离层是热塑性塑料。
热塑性塑料选自包括聚酰胺、聚酯、乙烯醇聚合物和共聚物、醋酸乙烯酯聚合物、氯乙烯聚合物和共聚物、偏二氯乙烯聚合物和共聚物，以及液晶聚合物的组。
所述有机隔离层具有大约5微米到大约50微米的厚度。
本发明涉及诸如管子容器之类的容器的后成形加工，其中，容器结构包括用于湿气和/或有机物的隔离层。有机隔离层通常涉及防止调料和香料通过容器壁。这些隔离层是箔，其为多层容器壁的一部分，且可以是有机或者无机的箔，诸如铝或者乙烯-乙烯醇的箔。然而，在后成形加工中，不能使该隔离箔层破裂。该隔离箔层必须保持连续，且是足够厚的层连续，以在任何后成形加工以后成为有效的隔离层。任何无机隔离层的金属或者金属合金必须具有足够的延展性，使得金属可以延展和变薄，而没有任何破裂。同样，对于有机隔离层，其必须能够变薄，但仍然保持足够的厚度来提供有效的隔离。对于金属箔隔离层，该金属箔一开始可以为大约7微米到大约50微米，最好为大约10微米到25微米。可以伸展大约1％到大约25％。更加高度可以延展的材料可以经历更大程度的伸展。对于有机箔，一开始可以为大约5微米到50微米，最好为大约10微米到25微米，且可以伸展大约1％到大约100％，且保持有效的隔离特性。
附图说明
图1是具有金属箔层的典型的容器壁的截面图；和
图2是具有有机箔层的典型的容器壁的截面图。
具体实施方式
现在将更详细地描述容器的后成形加工，同时维持容器壁的隔离特性。图1和2描述了具有隔离壁的典型的容器的壁。这些容器壁由层压材料形成，或者通过挤压吹模形成。如果壁包括金属箔，其将由层压材料形成。
尽管本发明适用于任何容器，但是其尤其适用于管子容器。
图1示出了管子容器的箔层压壁。该箔包括外部聚乙烯层、粘合层、铝箔层、粘合层和内部聚乙烯层。外部聚乙烯层具有大约50微米到大约250微米的厚度，内部铝箔层具有大约7微米到大约50微米的厚度，内部聚乙烯层具有大约50微米到大约250微米的厚度。粘合层是任何合适的粘合剂，诸如丙烯酸乙酯共聚物、顺丁烯二酸酐改性共聚物和三元共聚物、丙烯酸改性的聚烯烃，以及丙烯酸乙酯甲酯共聚物。这些粘合剂具有大约0.25微米到10微米的厚度。铝或者铝合金或者其它金属的延展性为大约1％到25％，最好为8％到15％。该材料可以伸展大约1％到大约25％，而铝箔层没有任何破裂。
图2示出了一种包括有机隔离层的典型的容器壁。该有机隔离层可以是任何乙烯、乙烯醇共聚物、聚酰胺、聚酯、PVDC(聚偏氯乙烯树脂)、
Figure C0380324200051
Figure C0380324200052
以及纳米复合物和液晶聚合物和混合物。有聚烯烃外部层、粘合剂层、有机膜隔离层和内部聚乙烯层。粘合剂可以是任何合适的粘合剂，诸如上述粘合剂的任何一种。外部聚烯烃层具有厚度为大约50微米到大约250微米，最好大约75微米到大约200微米。有机隔离层的厚度为大约5微米到大约50微米，最好大约15微米到大约30微米。内部聚烯烃层具有厚度为大约50微米到大约250微米，最好大约75微米到大约200微米。这些容器壁可以由层压形成，或者可以由挤压吹模形成。具有该结构的容器壁可以伸展大约1％到大约100％。这比金属箔用作隔离层要大。
发现具有25微米乙烯乙烯醇隔离层的层压结构在伸展以后具有同样的稍微改进的隔离特性。可以推理，伸展引起乙烯乙烯醇膜内的定向，从而尽管变薄，其相对于调料维持或者具有稍微改进的隔离特性。在认为伸展膜会具有有害的效果时不能预期上述结果。
通过后成形加工技术容器壁的伸展会给容器壁设置装饰性和/或功能性特征。可以使用的技术是那些在日本专利出版物56-20970和美国专利5756038中描述的，其通过引证在此引入。此外，在日本专利出版物56-20970的技术的改进中，容器壁可以只通过在模子部分上抽真空或者通过在模子部分上抽真空且从心轴压力吹气来在模子中提供正压力来改变。在这些技术的任何一种中，容器壁形成具有硬的形状。第三种技术包括管子壁的机械压印。这使用具有可膨胀的心轴的模子。容器被加热，且被放入模子中，以及可膨胀的心轴放入容器中。当致动时，可膨胀的心轴然后推动容器壁靠着模子的内表面，在容器的外表面上形成需要的表面特征(见所附心轴的附图)。
适于后成形加工的容器是那些将包含牙膏、洗液、凝胶产品、食物产品、润滑剂、药物等。可以后成形加工到管子上的结构包括把手和各种装饰物。例如，在管子上描绘的人物或者动物的图画也可以被实现从而形成更加装饰性的管子容器。

Claims (11)

1.一种将管子容器后成形加工成不同形状，且维持所述管子容器的隔离特性的方法，包括提供具有至少一个隔离层并且在所述隔离层的每个侧面上具有至少一个热塑性层的多层层压管子，所述隔离层可延长达到其长度的125％，且所述隔离层维持其隔离特性的至少大约90％。
2.如权利要求1所述的方法，其特征在于，所述隔离层是金属层。
3.如权利要求2所述的方法，其特征在于，所述金属是铝。
4.如权利要求2所述的方法，其特征在于，所述金属是铝合金。
5.如权利要求2所述的方法，其特征在于，所述金属是具有7微米到50微米厚度的金属膜。
6.如权利要求2所述的方法，其特征在于，每个热塑性层是聚烯烃。
7.如权利要求6所述的方法，其特征在于，所述聚烯烃选自包括聚乙烯和聚丙烯的组。
8.如权利要求1所述的方法，其特征在于，所述隔离层是有机隔离层。
9.如权利要求8所述的方法，其特征在于，所述有机隔离层是热塑性塑料。
10.如权利要求9所述的方法，其特征在于，热塑性塑料选自包括聚酰胺、聚酯、乙烯醇聚合物和共聚物、醋酸乙烯酯聚合物、氯乙烯聚合物和共聚物、偏二氯乙烯聚合物和共聚物，以及液晶聚合物的组。
11.如权利要求8所述的方法，其特征在于，所述有机隔离层具有5微米到50微米的厚度。
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