CN108437594A - 一种模切用低粉屑高洁净度离型膜 - Google Patents
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Abstract
本案公开了一种模切用低粉屑高洁净度离型膜，包括表层PE膜、中间层压敏胶和内层PET膜，所述的PE膜层含有提升特定性能的缓冲气囊，所述的PET膜含有一定量的功能性助剂。本案通过在PE层内引入以马来酸‑稀土化合物为内核、白炭黑为表层物质的缓冲气囊，降低模切刀对纸板的冲击作用而形成的粉屑，同时有效提高PE层的柔性与拉伸强度，同时稀土化合物的引入可一定程度提升使用寿命，白炭黑的引入可提升体系的耐高温和电绝缘性能，两种成核共生而产生的协效作用可大幅度提升体系的各项性能。
Description
技术领域
本发明涉及一种隔离膜，具体涉及一种模切用低粉屑高洁净度离型膜。
背景技术
在同步模切工艺中，模切的刀刃与模切材料表面直接接触，对板纸材料施加压力，令纸板在压力下发生断裂。在刀具钻入纸板向砧垫靠拢时，纸板表面被挤压、伸展和压缩，使其以“***穿透”的方式破裂。在模切时，若刀刃发生损坏，多余的力量会使刀刃冲击衬垫板表面，从而使刀刃变宽，增加施加在纸板表面的挤压力和伸展力，纸板进一步压缩后张力慢慢增加直至纸板断裂，这一过程会产生碎片和粉屑分子。
在模切中粉屑的产生极其影响成品纸张的质量，粉屑的吸入对人体的危害更是不言而喻。为了避免粉屑的产生，通常采用软性或“小厚度”的模切衬垫板，对生产规划中采用“浮刀”方式操作，或将双纸板和区域修补技术精确整合，使压切均匀。由于电子行业的兴起，模切工艺在生产领域大幅度扩张，模切中常用到离型膜。普通离型膜常遇到以下问题：1)离型膜表面过油，离型层很容易脱落；2)胶带与离型膜贴合后，剥离的时候有部分胶带反剥离；3)在放卷收卷过程中产生静电，吸附粉尘；4)模切过程中成产过量的粉屑，影响生产过程及生产工人的身体。
发明内容
针对现有技术的不足之处，本发明的目的在于提供一种模切用低粉屑高洁净度离型膜，其能够实现在模切过程中防止静电及粉屑的产生，并保护纸板，降低模切对纸板的冲击力。
本发明的技术方案概述如下：
一种模切用低粉屑高洁净度离型膜，包括以下层次：表层PE膜(1)、中间层压敏胶(2)和内层PET膜(3)，所述压敏胶层(2)位于PE膜(1)和PET膜(3)之间，PE膜(1)内部有以马来酸-稀土化合物(4)为内核、白炭黑(5)为表层物质的缓冲气囊；
所述离型膜包括以下重量份的材料：
优选的是，所述的模切用低粉屑高洁净度离型膜，其中，所述的马来酸-稀土化合物为马来酸镧、马来酸铈、马来酸镨、马来酸钕、马来酸钷、马来酸钐和马来酸铕的任一种或多种。
优选的是，所述的模切用低粉屑高洁净度离型膜，其中，所述的抗氧剂为2，6-二叔丁基对甲酚。
优选的是，所述的模切用低粉屑高洁净度离型膜，其中，所述的脱泡剂为乳化硅油、高碳醇脂肪酸酯复合物、聚氧乙烯聚氧丙烯季戊四醇醚的任一种或多种。
优选的是，所述的模切用低粉屑高洁净度离型膜，其中，所述的离型膜还包括10～20重量份的二溴苯酚。
优选的是，所述的模切用低粉屑高洁净度离型膜，其中，所述的离型膜还包括3～5重量份的噻二唑。
优选的是，所述的模切用低粉屑高洁净度离型膜，其中，所述压敏胶的180°剥离强度≥10N/25mm。
本发明的有益效果是：本案涉及的模切用低粉屑高洁净度离型膜，包含表面PE膜层、中间的压敏胶层和内部PET膜层，通过压敏胶层将功能性的PET膜层与起保护作用的PE层结合起来，避免相容性不佳而引起的起泡、性能降低等问题；在体系中引入PE可以一定程度降低生产成本，同时提高体系的柔韧性与透光度；通过在PE层内引入以马来酸-稀土化合物为内核、白炭黑为表层物质的缓冲气囊，降低模切刀对纸板的冲击作用而形成的粉屑，同时有效提高PE层的柔性与拉伸强度，同时稀土化合物的引入可一定程度提升使用寿命，白炭黑的引入可提升体系的耐高温和电绝缘性能，两种成核共生而产生的协效作用可大幅度提升体系的各项性能；通过对PE层和PET层的外表层进行防静电处理，防止在放卷收卷过程中产生静电而吸附粉尘。
附图说明
图1是模切用低粉屑高洁净度离型膜的主视结构示意图。
附图中的标记为：1、PE膜；2、压敏胶层；3、PET膜；4、马来酸-稀土化合物；5、白炭黑。
具体实施方式
下面结合实施例对本发明做进一步的详细说明，以令本领域技术人员参照说明书文字能够据以实施。
本案提出一实施例的模切用低粉屑高洁净度离型膜，包括以下重量份的材料：
本案所用的马来酸-稀土化合物和白炭黑可优选选用纳米级的粉末或微米级粉末。
作为本案另一实施例，其中，涂层还包括10～20重量份的二溴苯酚。作为反应型阻燃剂，二溴苯酚中C-Br键的键能较低，分解温度在200～300℃，低于PET的分解温度，在PET分解时，二溴苯酚也开始分解，能够捕捉PET分解时的自由基，同时释放的HBr覆盖在材料表面，起到抑制燃烧链、阻隔和稀释氧气浓度的作用。但需要注意的是，二溴苯酚的添加量应被限制，若二溴苯酚的添加量小于10重量份，无法有效地起到阻燃作用；若二溴苯酚的添加量大于20重量份，则影响PET膜层的机械强度和抗冲击性能。
作为本案又一实施例，其中，涂层还包括3～5重量份的噻二唑。实验发现，噻二唑的加入可以提升PET层的耐磨性能，从而起到保护作用，但同样的，噻二唑的添加量也须被限制，若噻二唑的添加量小于3重量份，则无法有效激发其耐磨损性能；若噻二唑的添加量大于5重量份，会刺激生产工人的眼睛、呼吸***和皮肤，同时不利于绿色环保生产。
作为本案又一实施例，其中，压敏胶的180°剥离强度≥10N/25mm。因需要紧密粘合PE层和PET层，不但需要提升两者的相容性而结合成一个整体，还要防止模切过程中对体系的损坏，普通的密封胶难以胜任，因此需要采用高剥离强度的压敏胶。因压敏胶的材料组成十分复杂，市场上有不同的型号，不同的具体成分有着不同的剥离强度，本案无需对压敏胶的具体成分做出限定，只需限定其180°剥离强度即可。若压敏胶的180°剥离强度<10N/25mm，PE层和PET层看似已粘牢，但在模切过程中容易引发层次脱离。
表一列出不同实施例的具体组成及其制得离型膜的性能参数：
表一
表二列出不同对比例的具体组成及其制得离型膜的性能参数：
表二
从以上两表可以看出，加入不同含量的马来酸镧和白炭黑后，能够大幅度降低模切过程中产生的粉屑；同时，合理的马来酸镧与白炭黑的配比能够一定程度上降低离模型的雾度、提高透光率，对离型膜的耐压强度和耐久性都有有效提升。
尽管本发明的实施方案已公开如上，但其并不仅仅限于说明书和实施方式中所列运用，它完全可以被适用于各种适合本发明的领域，对于熟悉本领域的人员而言，可容易地实现另外的修改，因此在不背离权利要求及等同范围所限定的一般概念下，本发明并不限于特定的细节。
Claims (7)
1.一种模切用低粉屑高洁净度离型膜，其特征在于：包括表层PE膜(1)、中间层压敏胶(2)和内层PET膜(3)，所述压敏胶层(2)位于PE膜(1)和PET膜(3)之间，PE膜(1)内部有以马来酸-稀土化合物(4)为内核、白炭黑(5)为表层物质的缓冲气囊；
所述离型膜包括以下重量份的材料：
2.根据权利要求1所述的模切用低粉屑高洁净度离型膜，其特征在于，所述的马来酸-稀土化合物为马来酸镧、马来酸铈、马来酸镨、马来酸钕、马来酸钷、马来酸钐和马来酸铕的任一种或多种。
3.根据权利要求1所述的模切用低粉屑高洁净度离型膜，其特征在于，所述的抗氧剂为2，6-二叔丁基对甲酚。
4.根据权利要求1所述的模切用低粉屑高洁净度离型膜，其特征在于，所述的脱泡剂为乳化硅油、高碳醇脂肪酸酯复合物、聚氧乙烯聚氧丙烯季戊四醇醚的任一种或多种。
5.根据权利要求1所述的模切用低粉屑高洁净度离型膜，其特征在于，所述的离型膜还包括10～20重量份的二溴苯酚。
6.根据权利要求1所述的模切用低粉屑高洁净度离型膜，其特征在于，所述的离型膜还包括3～5重量份的噻二唑。
7.根据权利要求1所述的模切用低粉屑高洁净度离型膜，其特征在于，所述压敏胶的180°剥离强度≥10N/25mm。
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| CN201291620Y (zh) * | 2008-05-08 | 2009-08-19 | 苏州斯迪克电子胶粘材料有限公司 | Pet-pe复合保护膜 |
| CN201892817U (zh) * | 2010-09-30 | 2011-07-06 | 广州南沙华卓化工有限公司 | 一种底片保护膜 |
| CN206279115U (zh) * | 2016-10-20 | 2017-06-27 | 太仓驰太电子新材料有限公司 | 一种高洁净度pe保护膜 |
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| CN201291620Y (zh) * | 2008-05-08 | 2009-08-19 | 苏州斯迪克电子胶粘材料有限公司 | Pet-pe复合保护膜 |
| CN201892817U (zh) * | 2010-09-30 | 2011-07-06 | 广州南沙华卓化工有限公司 | 一种底片保护膜 |
| CN206279115U (zh) * | 2016-10-20 | 2017-06-27 | 太仓驰太电子新材料有限公司 | 一种高洁净度pe保护膜 |
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