CN111825907A - 一种标签膜及强力交叉膜 - Google Patents

一种标签膜及强力交叉膜 Download PDF

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CN111825907A
CN111825907A CN201910327172.2A CN201910327172A CN111825907A CN 111825907 A CN111825907 A CN 111825907A CN 201910327172 A CN201910327172 A CN 201910327172A CN 111825907 A CN111825907 A CN 111825907A
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parts
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韩金
陈越
尹鹏超
张冬冬
刘维
张�杰
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Beijing Zhimian Technology Co ltd
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Abstract

本发明公开了一种标签膜及强力交叉膜。所述交叉膜由多层薄膜经交叉复合形成;所述薄膜由下述质量比的原料制成:聚乙烯50~58;聚丙烯20~30;增强剂5~7;增刚剂3~4;成核剂0.1~1;抗氧剂0.5~1.5;润滑剂0.1~1;抗粘剂0.1~1;色母粒3~6。如本发明强力交叉膜的表面涂覆特殊涂层,如热敏涂层、书写油墨涂层等,也可以再复合一些特殊材料,使其耐高温、易印刷、防腐蚀。本发明具有如下优点:1、具有高强度抗撕裂和尺寸稳定性,优于普通薄膜。2、具有抗紫外线照射的性能。3、耐高低温性能优异,优异的延伸性和抗拉性能。4、有独特的抗穿刺性、持续的抗撕裂性能,钉杆水密性优异。

Description

一种标签膜及强力交叉膜
技术领域
本发明涉及一种标签膜及强力交叉膜。
背景技术
PVC(聚氯乙烯)是一种高分子材料,有硬质和软质两种,耐久性、抗撕裂性、柔软性、耐化学腐蚀性好,但耐温性和抗拉伸性一般,受温度影响会出现一定程度的收缩。膜类产品一般由表面图层,面纸和涂底层组成(如需附胶还需粘胶剂、涂硅层、底纸)。现有的膜类产品在抗撕裂性上存在明显的缺点,只能达到在一个方向上抗撕裂效果尚可,另一方向破口抗撕裂能力很弱,因此需要提供一种具有较强抗撕裂性能的膜类产品。
发明内容
本发明的目的是提供一种强力交叉膜以及由强力交叉膜制成的标签膜,所述交叉膜在钉杆撕裂、裤型撕裂方面的强度高,且纵横向撕裂强度一致,从而解决了普通膜类在特殊使用场景下,撕裂特性不能满足的缺点。
本发明所提供的强力交叉膜,由多层薄膜经交叉复合形成;
所述薄膜由下述质量比的原料制成:
聚乙烯 50~58;
聚丙烯 20~30;
增强剂 5~7;
增刚剂 3~4;
成核剂 0.1~1;
抗氧剂 0.5~1.5;
润滑剂 0.1~1;
抗粘剂 0.1~1;
色母粒 3~6;
质量比具体可为:
1)聚乙烯 55;
聚丙烯 20~30;
增强剂 5~7;
增刚剂 3~4;
成核剂 0.1~1;
抗氧剂 0.5~1.5;
润滑剂 0.1~1;
抗粘剂 0.1~1;
色母粒 3~6;
2)聚乙烯 55;
聚丙烯 28;
增强剂 6;
增刚剂 3.5;
成核剂 0.5;
抗氧剂 1;
润滑剂 0.5;
抗粘剂 0.5;
色母粒 5。
所述强力交叉膜中,所述聚乙烯的分子量可为30~40万;
所述聚丙烯的分子量可为800~1000万;
所述增强剂可为塑料增强剂,具体可为DH-1塑料增强剂;
所述增刚剂可为塑料增刚剂,如A-P34A塑料增刚剂;
所述成核剂可为β-晶型成核剂,如NB-328;
所述抗氧剂可为抗氧剂DLTP;
所述润滑剂可为聚乙烯蜡;
所述抗粘剂可为塑料薄膜抗粘剂,如VK-SP30S塑料薄膜抗粘剂。
本发明进一步提供了所述强力交叉膜的制备方法,是将多层经过拉伸、旋切的薄膜经交叉复合而成,从而使得交叉膜具有更高的强度和双向抗撕裂强度。
具体地,所述强力交叉膜的制备方法,包括如下步骤:
(1)所述薄膜依次经拉伸和旋切;
(2)多层经步骤(1)中拉伸和旋切后的所述薄膜交叉复合即得。
上述的制备方法中,步骤(1)中,所述拉伸的步骤如下:
1)所述薄膜经挤出形成筒形薄膜,然后折叠为双层的管膜;
2)所述管膜依次经纵向拉伸、热收缩定型和冷却。
上述的制备方法中,步骤1)中,通过圆模头挤出所述筒形薄膜,然后经冷却后折叠为双层的所述管膜,可被收卷机折平收卷。
上述的制备方法中,步骤2)中,所述纵向拉伸在所述管膜的玻璃化态温度与黏流态温度之间进行。
上述的制备方法中,步骤2)中,所述纵向拉伸在多辊式纵向拉伸机中进行;
所述多辊式纵向拉伸机包括压辊和热式纵向拉伸辊,在所述压辊和所述热式纵向拉伸辊的速差下对所述管膜进行纵向拉伸;
可纵向拉伸3~5倍。
上述的制备方法中,步骤2)中,所述热收缩定型在辊式热收缩定型机中进行;
所述热收缩定型过程中采用热风机进行加热;
经冷却后利用收卷机制成单向拉伸筒形薄膜。
上述的制备方法中,步骤(1)中,所述旋切的步骤如下:
将经所述拉伸得到的管膜置于挤压机中,经过熔融、吹胀形成固定宽度的筒形薄膜,再经气刀旋切形成固定厚度的薄膜。
上述的制备方法中,步骤(2)中,所述交叉复合的步骤如下:
多层经步骤(1)中拉伸和旋切后的所述薄膜,通过熔融、吹胀和冷却后进行45度交叉复合即得到所述强力交叉膜;
所述熔融的条件如下:
温度为150~200℃;
所述吹胀的条件如下:
温度为20~50℃,气压为0.02~1.0MPa;
所述冷却的条件如下:
温度为10~15℃的冷空气。
如本发明强力交叉膜的表面涂覆特殊涂层,如热敏涂层、书写油墨涂层等,也可以再复合一些特殊材料,使其耐高温、易印刷、防腐蚀。
由所述强力交叉膜制成的标签膜也属于本发明的保护范围。
本发明具有如下优点:
1、具有高强度抗撕裂和尺寸稳定性,优于普通薄膜。
2、具有抗紫外线照射的性能。
3、耐高低温性能优异,优异的延伸性和抗拉性能。
4、有独特的抗穿刺性、持续的抗撕裂性能,钉杆水密性优异。
附图说明
图1为本发明对薄膜拉伸时的示意图。
图2为本发明对薄膜进行旋切的示意图。
具体实施方式
下述实施例中所使用的实验方法如无特殊说明,均为常规方法。
下述实施例中所用的材料、试剂等,如无特殊说明,均可从商业途径得到。
实施例1、强力交叉膜的制备
一、薄膜的制备
原料的组成如下(质量份):
聚乙烯55;聚丙烯28;增强剂6;增刚剂3.5;成核剂0.5;抗氧剂1;润滑剂0.5;抗粘剂0.5;色母粒5;
其中,聚乙烯的分子量为30~40万,聚丙烯的分子量为800-1000万,增强剂为DH-1塑料增强剂,增刚剂为聚乙烯增刚剂,成核剂为β-晶型成核剂NB-328,抗氧剂为抗氧剂DLTP,润滑剂为聚乙烯蜡,抗粘剂为VK-SP30S塑料薄膜抗粘剂。
将上述原料按照质量比混合,经压制形成薄膜。
二、交叉膜的制备
1、薄膜的拉伸
在图1所示的设备中进行拉伸工艺。
1)如图1所示,挤出机2通过圆模头3将上述制备的薄膜挤出筒形薄膜1,筒形薄膜1冷却并折叠为双层的管膜4,被收卷机5折平收卷。
2)如图1所示,将折平的管膜4放入放送机6,放送机6放送出管膜4进入多辊式纵向拉伸机9。利用压辊7和多根热式纵向拉伸辊8之间的速差对折叠的双层的管膜4在玻璃化态温度以上黏流态温度以下进行纵向拉伸5倍。然后进入辊式热收缩定型机10(采用热风机11进行加热)和冷却机12(用冷却辊13冷却),对管膜4进行热收缩定型以及冷却收卷制成单向拉伸筒形薄膜14。
2、薄膜的旋切
在图2所示的设备中进行旋切工艺。
如图2所示,将筒膜16置于挤压机17上,通过双辊模头进入挤压机。经热风机30,吹胀形成薄膜18,经过由压力探测器20控制的定型框19,形成固定宽度的薄膜24,再经气刀26(由气刀控制器27控制)分切成均匀厚度的四层薄膜23,每两层经45度交叉复合分别收卷于固定在底槽31上的滚轴25和28上。
3、薄膜的交叉复合
将多层经上述拉伸和旋切的薄膜,通过熔融(180℃高温环境)、吹胀(30℃,气压0.8MPa)、冷却(温度在15℃的冷空气)后进行45度交叉复合即得到所述强力交叉膜。
本实施例制备的强力交叉膜和普通膜(对比条件为同等克重和覆膜层数)的性能如表1所示:
表1强力交叉膜和普通膜的性能
Figure BDA0002036583250000051
其中,普通膜的制备方法:将塑料原料经过挤出机熔融挤成薄管,然后趁热用压缩空气将它吹胀,经冷却定型后即得。
表1中,各项指标均是经专业薄膜拉力测试机测试所得,具体方法如下:1、试样制备:宽度15mm,取样长度不小于150mm,夹具距间距25mm。2、实验速度:200mm/min。3、将试样装夹在夹具的两个夹头之间,两夹头做相对运动,通过位于动夹头上的力值传感器和机器内置的位移传感器,采集到试验过程中的力值变化和位移变化,从而计算出试样的拉伸,撕裂、变形率等指标。耐老化实验按GB/T 16422.3-2104中条件进行,实验条件:光源UV-A340;温度60℃;340nm辐射照度0.76W/㎡,老化时间48h,光照/冷凝=8h/4h。
由表1中的数据可以看出,本发明制备的交叉膜在钉杆撕裂、裤型撕裂方面的强度高,且纵横向撕裂强度一致,解决了普通膜类在特殊使用场景下,撕裂特性不能满足的缺点。
由本实施例制备的强力交叉膜制成标签膜,可用于标签设计、工业包装、防水材料(PCM反应粘防水卷材)等高端产品的市场。
如在强力交叉膜的表面做一些特殊涂层,如热敏涂层、书写油墨涂层等,也可以再复合一些特殊材料,使其具有耐高温、易印刷、防腐蚀的特点。

Claims (10)

1.一种交叉膜,由多层薄膜经交叉复合形成;
所述薄膜由下述质量比的原料制成:
聚乙烯 50~58;
聚丙烯 20~30;
增强剂 5~7;
增刚剂 3~4;
成核剂 0.1~1;
抗氧剂 0.5~1.5;
润滑剂 0.1~1;
抗粘剂 0.1~1;
色母粒 3~6。
2.根据权利要求1所述的交叉膜,其特征在于:所述薄膜由下述质量比的原料制成:
聚乙烯 55;
聚丙烯 20~30;
增强剂 5~7;
增刚剂 3~4;
成核剂 0.1~1;
抗氧剂 0.5~1.5;
润滑剂 0.1~1;
抗粘剂 0.1~1;
色母粒 3~6。
3.根据权利要求1或2所述的交叉膜,其特征在于:所述交叉膜按照下述权利要求4-10中任一项所述方法制备。
4.权利要求1-3中任一项所述交叉膜的制备方法,包括如下步骤:
(1)所述薄膜依次经拉伸和旋切;
(2)多层经步骤(1)中拉伸和旋切后的所述薄膜交叉复合即得。
5.根据权利要求4所述的制备方法,其特征在于:步骤(1)中,所述拉伸的步骤如下:
1)所述薄膜经挤出形成筒形薄膜,然后折叠为双层的管膜;
2)所述管膜依次经纵向拉伸、热收缩定型和冷却。
6.根据权利要求5所述的制备方法,其特征在于:步骤2)中,所述纵向拉伸在所述管膜的玻璃化态温度与黏流态温度之间进行。
7.根据权利要求5或6所述的制备方法,其特征在于:步骤2)中,所述纵向拉伸在多辊式纵向拉伸机中进行;
所述多辊式纵向拉伸机包括压辊和热式纵向拉伸辊,在所述压辊和所述热式纵向拉伸辊的速差下对所述管膜进行纵向拉伸。
8.根据权利要求5-7中任一项所述的制备方法,其特征在于:步骤2)中,所述热收缩定型在辊式热收缩定型机中进行;
所述热收缩定型过程中采用热风机进行加热。
9.根据权利要求4-8中任一项所述的制备方法,其特征在于:步骤(1)中,所述旋切的步骤如下:
将经所述拉伸得到的管膜置于挤压机中,经过熔融、吹胀形成固定宽度的筒形薄膜,再经气刀旋切形成固定厚度的薄膜。
10.根据权利要求4-9中任一项所述的制备方法,其特征在于:步骤(2)中,所述交叉复合的步骤如下:
多层经步骤(1)中拉伸和旋切后的所述薄膜通过熔融、吹胀和冷却后进行45度交叉复合即得到所述强力交叉膜。
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