CN109321162B - 一种pvc胶带及其制备方法 - Google Patents

一种pvc胶带及其制备方法 Download PDF

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CN109321162B
CN109321162B CN201811035777.6A CN201811035777A CN109321162B CN 109321162 B CN109321162 B CN 109321162B CN 201811035777 A CN201811035777 A CN 201811035777A CN 109321162 B CN109321162 B CN 109321162B
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陈裕旺
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Chen Yuwang
Shanghai Guke Technology Co ltd
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    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00Adhesives in the form of films or foils
    • C09J7/40Adhesives in the form of films or foils characterised by release liners
    • C09J7/401Adhesives in the form of films or foils characterised by release liners characterised by the release coating composition
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    • C09D183/00Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
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Abstract

本发明公开一种PVC胶带的制备方法,其包括步骤:(a)在PVC膜一面涂布不干胶;(b)然后在PVC膜的另一面涂布可由紫外线照射硬化的离型剂;(c)通过紫外线照射干燥,使所述离型剂硬化。所述方法是先涂布不干胶后再做离型剂涂布,然后使用紫外线硬化离型剂。可避免离型剂因PVC膜中的可塑剂因高温而移行,进而影响离型剂对PVC膜的附着,不会出现使用铂金催化剂时受到PVC膜中的氯毒化而丧失催化效果的现象。本发明所述方法经过一次加工即可完成胶水和离型剂的涂布和干燥,可减少加工时间和能源的浪费,也可减少运输成本的浪费,还可减少材料在加工过程因拉伸变形,避免横向扩张不均匀的问题。

Description

一种PVC胶带及其制备方法
技术领域
本发明属于薄膜技术领域,具体涉及一种PVC胶带及其制备方法。
背景技术
图1所示为一种PVC胶带,可作为芯片切割所使用的低价保护膜,其中间一层为PVC膜1,PVC膜1外侧表面涂布有离型剂2,内侧表面涂布有胶水3。国内制造该PVC胶带的工艺过程如图2所示,以日本进口且做好离型处理的PVC膜作为原材料,通过供胶设备直接涂布不干胶,然后经过烘箱干燥后收卷制得。
上述工艺步骤存在以下缺点:
1、从日本进口进来的PVC膜因为涂有离型剂,此离型剂在涂胶过程经过烘箱高热,会发生老化裂解,以致离型剂部分转移到胶水表面,当客户的芯片沾黏在此胶带上时,离型剂会再次的转移到芯片上,从而造成芯片污染。
2、PVC膜上涂布离型剂和胶水分为两次进行加工,一方面造成能源和时间的浪费,另一方面PVC膜经过两道生产线,受到两次拉伸,加工过程因拉伸变形较大,导致纵向/横向扩张不均匀,以致在芯片切割完成后挑拣易因纵向横向扩张不均而发生漏挑。
3、另外,现有的离型剂硬化处理时采用铂金催化剂,铂金催化剂会受到PVC膜中的氯毒化而丧失催化效果。
发明内容
针对现有技术中PVC胶带的制备过程中离型剂以转移到胶水表面,浪费能源和时间且影响胶带使用性能的技术问题,本发明的目的是提供一种PVC胶带及其制备方法,本发明所述方法不仅可避免离型剂转移,而且一次加工完成,同时可保证胶带性能。
本发明的PVC胶带的制备方法,包括步骤:
(a)在PVC膜一面涂布不干胶;
(b)然后在PVC膜的另一面涂布可由紫外线照射硬化的离型剂;
(c)通过紫外线照射干燥,使所述离型剂硬化。
与现有的先涂上离型剂后涂布不干胶的方法不同,本发明所述方法是先涂布不干胶后再做离型剂涂布,然后使用紫外线硬化离型剂。本发明所述方法涂布不干胶之后再做离型处理,可避免离型剂因PVC膜中的可塑剂因高温而移行,进而影响离型剂对PVC膜的附着。而使用紫外线照射使离型剂硬化,可使反应完全,不会出现使用铂金催化剂时受到PVC膜中的氯毒化而丧失催化效果的现象。本发明所述方法经过一次加工即可完成胶水和离型剂的涂布和干燥,可减少加工时间和能源的浪费,也可减少运输成本的浪费,还可减少材料在加工过程因拉伸变形,避免纵向横向扩张不均匀的问题。
所述离型剂可由有机硅油和光起始剂组成。
本发明的一些较佳实施例中,所述离型剂配方为:
有机硅油C715∶0~50wt%;
有机硅油RC722∶50~100wt%;
有机硅油A18∶0~10wt%;
含有光起始剂的有机硅油CD9051∶0~10wt%;
上述组分均为埃肯有机硅公司(blue star)的产品。
优选的,所述离型剂配方为:
有机硅油C715∶15~35wt%;
有机硅油RC722∶60~80wt%;
有机硅油A18∶0~5wt%;
含有光起始剂的有机硅油CD9051∶0~10wt%;
更优选的,所述离型剂配方为:
有机硅油C715∶29wt%;
有机硅油RC722∶69wt%;
有机硅油A18∶2wt%。
本发明的另一些较佳实施例中,所述离型剂配方为:所述离型剂配方为:
有机硅油SILCOLEASE UV RCA200:0~50wt%;
有机硅油SILCOLEASE UV POLY200:50~100wt%;
有机硅油和光起始剂的混合物SILCOLEASE UV CATA211∶0~10wt%;
上述组分均为德固赛公司(Degusa)的产品。
优选的,所述离型剂配方为:
有机硅油SILCOLEASE UV RCA200:15~35wt%;
有机硅油SILCOLEASE UV POLY200:60~80wt%;
有机硅油和光起始剂的混合物SILCOLEASE UV CATA211∶0~5wt%;
更优选的,所述离型剂配方为:
有机硅油SILCOLEASE UV RCA200:29wt%;
有机硅油SILCOLEASE UV POLY200:69wt%;
有机硅油和光起始剂的混合物SILCOLEASE UV CATA211∶2wt%。
较佳的,所述离型剂经紫外线照射硬化后的离型剥离力为10~30g/英寸。
较佳的,所述不干胶为丙烯酸类压敏胶。
本发明的积极进步效果:
与现有的先涂上离型剂后涂布不干胶的方法不同,本发明所述方法是先涂布不干胶后再做离型剂涂布,然后使用紫外线硬化离型剂。本发明所述方法涂布不干胶之后再做离型处理,可避免离型剂因PVC膜中的可塑剂因高温而移行,进而影响离型剂对PVC膜的附着。而使用紫外线照射使离型剂硬化,可使反应完全,不会出现使用铂金催化剂时受到PVC膜中的氯毒化而丧失催化效果的现象。本发明所述方法经过一次加工即可完成胶水和离型剂的涂布和干燥,可减少加工时间和能源的浪费,也可减少运输成本的浪费,还可减少材料在加工过程因拉伸变形,避免纵向横向扩张不均匀的问题。
附图说明
图1为PVC胶带的结构示意图;
图2为现有的PVC胶带的制备工艺流程图;
图3为本发明的PVC胶带的制备工艺流程图。
具体实施方式
以下将结合具体实施例和附图对本发明作进一步的说明。
实施例1
一种PVC胶带的制备方法,其工艺流程如图3所示,包括步骤:
(a)在PVC膜一面涂布丙烯酸类压敏胶。
(b)然后在PVC膜的另一面涂布可由紫外线照射硬化的离型剂;
离型剂配方为:
有机硅油C715∶25wt%;
有机硅油RC722∶70wt%;
有机硅油A18∶2wt%;
有机硅油和光起始剂的混合物CD9051∶3wt%。
上述组分均为埃肯有机硅公司的产品,下面的实施例2和3相同。
(c)通过紫外线照射干燥,使所述离型剂硬化,冷却后收卷即得PVC胶带。
实施例2
参照实施例1,区别在于,离型剂配方为:
有机硅油C715∶40wt%;
有机硅油RC722∶50wt%;
有机硅油A18∶5wt%;
有机硅油和光起始剂的混合物CD9051∶5wt%。
实施例3
参照实施例1,区别在于,离型剂配方为:
有机硅油C715∶29wt%;
有机硅油RC722∶69wt%;
有机硅油A18∶2wt%。
实施例4
参照实施例1,区别在于,离型剂配方为:
有机硅油SILCOLEASE UV RCA200∶29%;
有机硅油SILCOLEASE UVPOLY200∶69%;
有机硅油和光起始剂的混合物SILCOLEASE UV CATA211∶2%。
上述组分均为德固赛公司的产品,下面的实施例5和6相同。
实施例5
参照实施例1,区别在于,离型剂配方为:
有机硅油SILCOLEASE UV RCA200∶5%;
有机硅油SILCOLEASE UVPOLY200∶80%;
有机硅油和光起始剂的混合物SILCOLEASE UV CATA211∶15%。
实施例6
参照实施例1,区别在于,离型剂配方为:
有机硅油SILCOLEASE UV RCA200∶1%;
有机硅油SILCOLEASE UVPOLY200∶98%;
有机硅油和光起始剂的混合物SILCOLEASE UV CATA211∶1%。
经测试,上述实施例1~6制备的PVC胶带,离型剥离力如表1所示。
表1实施例1-6的PVC胶带的剥离力
Figure BDA0001790833020000051
由表1可知,上述实施例1~6制备的PVC胶带具有较小剥离力,为10~30g/inch,可以满足芯片包装的要求。
与现有的先涂上离型剂后涂布不干胶的方法不同,本发明所述方法是先涂布不干胶后再做离型剂涂布,然后使用紫外线硬化离型剂。本发明所述方法涂布不干胶之后再做离型处理,可避免离型剂因PVC膜中的可塑剂因高温而移行,进而影响离型剂对PVC膜的附着。而使用紫外线照射使离型剂硬化,可使反应完全,不会出现使用铂金催化剂时受到PVC膜中的氯毒化而丧失催化效果的现象。本发明所述方法经过一次加工即可完成胶水和离型剂的涂布和干燥,可减少加工时间和能源的浪费,也可减少运输成本的浪费,还可减少材料在加工过程因拉伸变形,避免横向扩张不均匀的问题。
以上对本发明进行了详细的介绍,文中应用了具体的实例对本发明进行阐述,这是为了便于该技术领域的普通技术人员能理解和应用本发明。熟悉本领域的人员可以容易地对这些实施例做出各种修改,并应用到其他实施例中而不必经过创造性的劳动。因此,本发明不限于这里的实施例,本领域技术人员根对于本发明做出的改进和修改都应该在保护范围之内。

Claims (3)

1.一种PVC胶带的制备方法,其特征在于,步骤为:
(a)在PVC膜一面涂布不干胶;
(b)然后在PVC膜的另一面涂布可由紫外线照射硬化的离型剂;
(c)通过紫外线照射干燥,使所述离型剂硬化;
所述离型剂的配方为:
有机硅油RC715∶29wt%;
有机硅油RC722∶69wt%;
光起始剂A18∶2wt%;
或所述离型剂配方为:
有机硅油SILCOLEASE UV RCA200:29wt%;
有机硅油SILCOLEASE UV POLY200:69wt%;
光起始剂SILCOLEASE UV CATA211∶2wt%;
所述不干胶为丙烯酸类压敏胶。
2.如权利要求1所述的PVC胶带的制备方法,其特征在于,所述离型剂经紫外线照射硬化后的离型剥离力为10~30gf/英寸。
3.一种如权利要求1~2任一项所述的方法制备的PVC胶带。
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