CN108602608B - 方便面容器用盖体 - Google Patents

方便面容器用盖体 Download PDF

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CN108602608B
CN108602608B CN201780008807.1A CN201780008807A CN108602608B CN 108602608 B CN108602608 B CN 108602608B CN 201780008807 A CN201780008807 A CN 201780008807A CN 108602608 B CN108602608 B CN 108602608B
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CN108602608A (zh
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下野贵裕
后藤雅士
上野友央
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Nissin Food Products Co Ltd
Toppan Inc
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Toppan Printing Co Ltd
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Abstract

提供一种根据从开始热水处理起所经过的时间而进行相应的显示的方便面容器用盖体。该方便面容器用盖体从一个面至另一个面依次包括表面材料、中间材料、以及具有密封剂层的密封基材,表面材料中除了既定的第1区域之外具有印刷层,中间材料从一个面开始依次具有纸层、印刷层、隔离层、以及位于在盖体的俯视图中覆盖第1区域的第2区域中的蜡层,在第1区域中,从表面材料至中间材料的纸层形成有第1半切口,在第2区域内的与第1区域的外侧相对的部分中,从中间材料的隔离层至纸层形成有第2半切口。

Description

方便面容器用盖体
技术领域
本发明涉及在容纳方便面的包装容器中所使用的盖体。
背景技术
杯装方便面等食品在食用时,需要通过注入热水并等待预定时间以进行热水恢复(湯戻し)等热水处理(加热烹饪)。这种热水处理这样进行:将覆盖杯状容器开口的盖体部分地从杯状容器本体剥离,从露出的开口部注入热水,再次用盖体盖住开口部,并在这种状态下等待。需要等待的时间随每个产品而确定目标,常规上一般而言,用户通过时钟来确认经过了目标时间后,将盖体完全地从容器本体除去,然后开始食用。
另一方面,受热而随时间发生变化的指示标签是已知的(专利文献1、2)。在这样的指示物中,受热熔解的蜡与一旦被所熔化的蜡浸透则会变色的片材层叠,并经由粘接剂而贴附在物品上。
现有技术文献
专利文献
专利文献1:日本专利第4833458号公报
专利文献2:日本专利第3426546号公报
发明内容
发明所要解决的课题
若用户在不使用时钟的情况下也能够知道所经过的大致时间,则可提高便利性。因此,考虑将这样的指示标签安装在包装容器上。
然而,由于上述的指示标签为经由胶带而进行安装的构造,因而当安装于包装容器上时,在流通时会有脱落的可能。另外,对于近年来的方便食品,后加入型的调味液或调味料等通过熔接剂或粘接剂而固定于盖体上,用户也可能会将指示物误认为上述调味液或调味料等,从而将该指示物剥离。因此,难以将常规的指示标签安装于盖体上。
本发明是鉴于这样的情况而完成的,其目的在于提供一种根据从开始热水处理起所经过的时间而进行相应的显示的方便面容器用盖体。
用于解决课题的手段
用于解决上述课题的本发明的一个方面是这样的方便面容器用盖体,其从一面至另一面依次包括表面材料、中间材料、以及具有密封剂层的密封基材,在所述方便面容器用盖体中,表面材料中除了既定的第1区域之外具有印刷层;中间材料从一面开始依次具有纸层、印刷层、隔离(目止め)层、以及位于在盖体的俯视图中覆盖第1区域的第2区域中的蜡层,在第1区域中,从表面材料至中间材料的纸层形成有第1半切口,在第2区域内的与第1区域的外侧相对的部分中,从中间材料的隔离层至纸层形成有第2半切口。
发明的效果
根据本发明,方便面容器的盖体本身能够显示从开始热水处理起所经过的时间,因而便利性提高。
附图简要说明
[图1]图1为根据本发明的一个实施方式的包装容器的透视图。
[图2]图2为根据本发明的一个实施方式的盖体的俯视图及示意性截面图。
[图3]图3为根据本发明的一个实施方式的盖体的窗孔的放大俯视图及示意性截面图。
具体实施方式
(实施方式)
以下对于本发明的一个实施方式进行说明。图1表示包含本实施方式所涉及的盖体100、以及盖体100所密封的容器本体200的方便面用的包装容器300的透视图。图2(a)表示盖体100的俯视图,图2(b)示意性地表示沿图2(a)的A-A’线的部分截面。盖体100依次包括表面材料110、中间材料120以及密封基材130。在盖体100上设置有例如为圆形的既定区域的窗孔150,如后所述,窗孔具有指示物的功能。
表面材料110从成为包装容器300的外侧一方开始,包括PET(聚对苯二甲酸乙二醇酯)层111、图案印刷层112以及遮光印刷层113。在窗孔150中并不设置图案印刷层112和遮光印刷层113。
中间材料120从靠近表面材料110的那一侧开始,具有纸层121、印刷层122、隔离层123、以及蜡层124。在盖体100的俯视图中,蜡层124覆盖窗孔150并设置于比窗孔150更宽的范围内。隔离层可以通过利用公知的涂布技术来涂布低密度聚乙烯、中密度聚乙烯、高密度聚乙烯、直链状(线性)低密度聚乙烯、使用茂金属催化剂(单位点催化剂)聚合而得的乙烯/α-烯烃共聚物、聚丙烯、乙烯/醋酸乙烯酯共聚物、离子交联树脂、乙烯-丙烯酸乙酯共聚物、乙烯-丙烯酸共聚物、乙烯-甲基丙烯酸共聚物、乙烯-丙烯共聚物、甲基戊烯聚合物、用丙烯酸、甲基丙烯酸、马来酸酐、富马酸等不饱和羧酸对聚乙烯或聚丙烯等聚烯烃系树脂进行改性而得的酸改性聚烯烃系树脂、聚对苯二甲酸乙二醇酯树脂、聚对苯二甲酸丁二醇酯树脂、尼龙树脂等热塑性树脂或者公知的涂布材料来形成。
密封基材130从靠近中间材料120的那一侧开始,包括热塑性树脂层131、铝层132以及密封剂层133。作为热塑性树脂层,可以使用低密度聚乙烯、中密度聚乙烯、高密度聚乙烯、直链状(线性)低密度聚乙烯、使用茂金属催化剂(单位点催化剂)聚合而得的乙烯/α-烯烃共聚物、聚丙烯、乙烯/醋酸乙烯酯共聚物、离子交联树脂、乙烯-丙烯酸乙酯共聚物、乙烯-丙烯酸共聚物、乙烯-甲基丙烯酸共聚物、乙烯-丙烯共聚物、甲基戊烯聚合物、用丙烯酸、甲基丙烯酸、马来酸酐、富马酸等不饱和羧酸对聚乙烯或聚丙烯等聚烯烃系树脂进行改性而得的酸改性聚烯烃系树脂、聚对苯二甲酸乙二醇酯树脂、聚对苯二甲酸丁二醇酯、尼龙树脂等。
在窗孔150中,从表面材料110至中间材料120的纸层121形成有第1半切口141。另外,在窗孔150的外侧附近的设置有蜡层的部分中,从中间材料120的隔离层123至纸层121形成有第2半切口142。
以下,对将热水注入至容器本体200时盖体100的变化进行说明。图3表示窗孔150附近的盖体100(参照图2)的俯视图以及截面图。借助热水所导致的温度上升了的包装容器300(参照图1)内的空气,使得盖住容器本体200(参照图1)的开口的盖体100也被加热,如图3(a)所示,蜡层124(参照图2)的蜡的粘度开始下降,粘度下降了的蜡穿过第2半切口142,开始向纸层121渗透(参照图2)。当纸层121被蜡渗透时,其透明度提高。因此,当蜡渗透至窗孔150的内侧的纸层121时,印刷层122(参照图2)的印刷色会透过纸层121,由此从表面材料110那一侧能够看到变色。需要说明的是,通过第1半切口141,纸层121中所含的空气能够排出至盖体100的外部,使得蜡更顺利地容易渗透。另外,在窗孔150以外的区域中,
来自纸层121那一侧的光被遮光印刷层113(参照图2)的印刷所遮挡,从而使得变色被掩盖而无法看到,图案印刷层112(参照图2)的印刷色得以维持,设计性不受损害。
当蜡向纸层121的渗透继续进行时,如图3(b)所示,印刷层122的印刷色所透过的范围扩大,从窗孔150所看到的变色范围扩大。当渗透扩展至窗孔150内部的整个纸层121时,如图3(c)所示,窗孔150内部全部变色。
如上所述,从窗孔150所看到的变色范围扩大,由此能够把握热水注入之后所经过的时间。通过适当地设计蜡层124的蜡的熔点、纸层121的材质、厚度、窗孔150的大小、第1半切口141、第2半切口142的位置、长度、深度、形状等,从而能够根据内容物的加热处理所需的时间来调整变色范围的扩大速度。另外,通过适当地设计纸层121的厚度,从而能够将由包装容器300的外部气温和风等所引起的对蜡层124的温度影响减少至必要程度。由此,用户能够知道内容物的食用时间。
上述的盖体100的层结构等是一个例子,只要从包装容器300的外部能够看到蜡层124的蜡向纸层121的渗透即可,没有限定。例如,窗孔150、图案印刷层112、遮光印刷层113可以根据盖体100的设计等而变形,窗孔150也可以不是圆形的,图案印刷层112、遮光印刷层114只要能够掩盖纸层121,则也可以由1层构成。另外,只要是在蜡向纸层121的渗透时能够透过纸层121而可以确认的颜色即可,中间材料120的印刷层122可着色为任意的颜色,除此以外,或者,取而代之的是,也可以将蜡层124的蜡着色为任意的颜色。
通过使密封基材130包含热塑性树脂层131这样的基材,在将中间体与密封基材130层压时,热难以传导至蜡层124,能够防止蜡的熔解。另外,在将层叠表面材料110和中间材料120而得的中间体卷取或多个叠加而进行保管和运输时,为了防止蜡层124粘接到与其面对的表面材料110上而无法剥离,可以在表面材料的PET层111的表面上进一步层叠剥离清漆,为了防止蜡层124折断,也可以在蜡中混合低熔点的物质以调整常温下的粘度。
在本发明中,由于盖体本身具有受热变化的指示物,因而不需要安装常规的指示标签,不会发生脱落或用户的误认。另外,相比于在外部附加常规指示标签的方式,在本发明中,由于蜡层存在于包装容器的内部,因而在热水注入时,热向蜡的传导快,变色很快地开始,响应性提高。此外,由于可以在蜡层形成时、密封基材的层压时、打标签时等多个步骤中进行检查,因而能够在制造盖体的同时可靠地确保指示物功能的品质。
实施例
作为本发明的实施例,制作了图2所示的盖体100。对于表面材料110,从包装容器外侧开始设为PET层12μm/图案印刷层/遮光印刷层。对于中间材料120,设为单面铜版纸层(104.7g/m2)/红色油墨层/隔离层/蜡层。对于密封基材130,设为PET层12μm/铝9μm/密封剂层45μm。将蜡层设置在边长15mm的正方形范围内,并使第2半切口142的位置处的厚度为0.1mm。
盖体100设为直径96mm,并在周边的一个地方设置了用于开封时拉起的拉手。窗孔150设为直径为8mm的圆形,并且以这样的位置为中心,该中心位于穿过盖体100的拉手的直径上并且距离与拉手正好相反那一侧的边缘的长度(图2所示的d)为20mm。这样,关于与穿过盖体100的拉手的直径垂直的直径,若将窗孔150配置于与拉手相反的那一侧的区域(图2的上半部分的区域),则在注入热水时,即使将拉手附近的边缘从容器本体200剥离,窗孔150附近也难以被剥离,故外面的空气难以流入到盖体100的靠近包装容器300的内部一侧从而难以引起温度降低,因而是优选的。
设置了一个第1半切口141,其长度为2mm。在与窗孔150成为同心圆的位置处设置了第2半切口142,其为直径为9mm、深度为50μm的圆形。
制作了5个这样的实施例所涉及的盖体100样品,并分别密封于发泡聚乙烯制的容积500ml的容器本体200的开口部边缘,从而制作了包装容器300。依据JIS Z0232的运输试验方法对其进行了60分钟的5Hz至50Hz的垂直振动。其后,将拉手拉起从而开封,直到穿过拉手的直径方向的长度成为48mm,然后注入300ml的95℃的热水,再次将开口部盖住,并用胶带将拉手附近固定于容器本体200。在气温为40℃的环境下,测定从热水注入直到窗孔150的内侧区域全部变色为止所需的时间。其结果示于表1中。
[表1]
变色结束时间(秒) 指示物异常
样品1 155
样品2 140
样品3 147
样品4 152
样品5 160
平均 150.8
如表1所示,可以确认,各个样品的盖体均没有发生由窗孔部分的层间剥离等所引起的指示物功能的异常,变色所需要的时间控制在140秒至160秒的范围内,即使在运输后,注入热水之后所经过的时间也能够稳定地表现出来。
工业实用性
本发明可用于方便面容器等的盖体。
符号的说明
100 盖体
110 表面材料
111 PET层
112 图案印刷层
113 遮光印刷层
121 纸层
122 印刷层
123 隔离层
124 蜡层
131 热塑性树脂层
132 铝层
133 密封剂层
141 第1半切口
142 第2半切口
150 窗孔
200 容器本体
300 包装容器

Claims (3)

1.一种方便面容器用盖体,其从一个面至另一个面依次包括表面材料、中间材料、以及具有密封剂层的密封基材,
所述表面材料包括:具有印刷层的部分、以及不具有印刷层的第1区域即窗孔部分,并且所述窗孔具有指示物的功能;
所述中间材料从所述一个面开始依次具有纸层、印刷层、隔离层、以及位于第2区域中的蜡层,在所述盖体的俯视图中,所述第2区域覆盖所述第1区域,
在所述第1区域中,从所述表面材料至所述中间材料的纸层形成有第1半切口,
在所述第2区域内的与所述第1区域的外侧相对的部分中,从所述中间材料的所述隔离层至所述纸层形成有第2半切口。
2.根据权利要求1所述的方便面容器用盖体,其中,所述表面材料的印刷层至少包括遮挡来自所述纸层所在侧的光的遮光印刷层。
3.根据权利要求1或2所述的方便面容器用盖体,其中,所述表面材料的所述一个面的表面上层叠有聚对苯二甲酸乙二醇酯膜。
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