CN117567954A - 一种高内聚uv减粘胶带及其制备方法 - Google Patents
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Abstract
本发明公开了一种高内聚UV减粘胶带及其制备方法,所述高内聚UV减粘胶带由基材层、基材层上的底涂层、底涂层上的UV减粘胶层和UV减粘胶层上的离型膜层组成,所述UV减粘胶层由原料组分完全相同、但UV光照后粘合性不同的2‑3层UV减粘胶先后涂布于所述底涂层上固化形成。由于UV减粘胶层的复合胶层结构中各层阻聚剂用量不同,导致各胶层对UV光固化聚合过程的阻聚程度不同,保证外层UV减粘胶层的减粘效果优异,易于与被贴物分离,内层UV减粘胶层的减粘效果较差且缓慢,在外层UV减粘胶层和基材层之间起到了缓冲作用,保证了UV减粘胶层与基材的粘附性。同时,UV减粘胶层中各胶层直接采用相同组分,大分子链在各层间依靠分子间力形成网状结构牢牢锁死,保证了胶层之间的粘附性,使得UV减粘胶层之间不分层。在UV减粘胶层和基材层中间加入特定底涂强化基粘,保证基材层与UV减粘胶层不分层,进而在保证晶圆破损低及残胶少的前提下,解决了UV减粘胶层与基材层分层的问题。
Description
技术领域
本发明涉及胶带技术领域,具体为一种高内聚UV减粘胶带及其制备方法。
背景技术
基于当下晶圆切割以及半导体切割领域的发展,对UV减粘胶带提出了新的需求,即UV前具有高粘性,对被贴物起到保护作用,UV后粘度迅速下降,便于被贴物转移,同时减粘胶带需要具备高内聚性能,以保证切割时不飞料渗水,UV后胶带无残留。
目前,UV减粘胶带应用的主要矛盾是:一、若提高UV减粘胶带UV前的粘性,则会出现UV后粘度降低下限升高、降低速度慢以及残胶、飞料等问题;二、若想提高晶圆可移除性,降低UV后的粘性,又会导致UV减粘胶带初粘低,对切割的保护能力下降,且在制程过程中晶圆存在滑移的危险导致保护失效。虽然在高分子链引入功能基团,可增加初粘,解决UV前粘性差的问题,同时增加感光基团,搭配使用光引发剂,可使胶带UV后高分子链迅速交联固化减粘,但同时会导致减粘胶带损耗模量急剧上升,胶带变脆,与基材的附着力明显降低,进而导致与基材的分层。现急需一种UV减粘胶带,其具有高的内聚力性能,在保证晶圆破损低及残胶少的前提下,解决UV减粘胶带与基材层分层的问题。
发明内容
本发明的目的在于提供一种高内聚UV减粘胶带及其制备方法,以解决上述背景技术中提出的问题。
本发明提供了一种高内聚UV减粘胶带,由基材层、基材层上的底涂层、底涂层上的UV减粘胶层和UV减粘胶层上的离型膜层组成,所述UV减粘胶层由组分相同、UV光照后粘性不同的2-3层UV减粘胶先后涂布于所述底涂层上固化形成。
进一步的,其中所UV减粘胶包括以下组份:UV丙烯酸母胶、阻聚剂、光引发剂I、光引发剂II、固化剂以及溶剂。
进一步的,所述UV减粘胶层包括靠近底涂层的内层UV减粘胶层和靠近离型膜层的外层UV减粘胶层。
进一步的,所述外层UV减粘胶层和内层UV减粘胶层除阻聚剂外的组成相同,均为:UV丙烯酸母胶、光引发剂I、光引发剂II、固化剂和溶剂的质量比为1000∶(10-20)∶(0-4)∶(3-8)∶(40-80);所述外层UV减粘胶层中UV丙烯酸母胶与阻聚剂的质量比为1000∶(0.1-0.2),内层UV减粘胶层中UV丙烯酸母胶与阻聚剂的质量比为1000∶(0.4-0.6)。
进一步的,所述UV减粘胶层包括靠近底涂层的内层UV减粘胶层、靠近离型膜层的外层UV减粘胶层以及位于内、外层UV减粘胶层之间的中间层UV减粘胶层。
进一步的,所述外层UV减粘胶层、中间层UV减粘胶层和内层UV减粘胶层除阻聚剂外的组成相同,均为:UV丙烯酸母胶、光引发剂I、光引发剂II、固化剂和溶剂的质量比为1000∶(10-20)∶(0-4)∶(3-8)∶(40-80);所述外层UV减粘胶层中UV丙烯酸母胶与阻聚剂的质量比为1000∶(0.1-0.2),中间层UV减粘胶层中UV丙烯酸母胶与阻聚剂的质量比为1000∶(0.25-0.35),内层UV减粘胶层中UV丙烯酸母胶与阻聚剂的质量比为1000∶(0.4-0.6)。
进一步的,所述UV丙烯酸母胶的固含量为:30%-40%,在UV光照前剥离力>1200gf/in,在光照强度300mJ/cm2条件下光照5秒后剥离力<20gf/in。
进一步的,所述阻聚剂选自阻聚剂510、阻聚剂701和MEHQ中的至少一种。
进一步的,所述光引发剂I为光引发剂TPO和/或光引发剂TMO;所述光引发剂II包括光引发剂184、光引发剂1173、光引发剂907、光引发剂369中的一种或多种。
进一步的,所述固化剂为改性多异氰酸酯类固化剂,具体为甲苯二异氰酸酯、异佛尔酮二异氰酸酯、二苯基甲烷二异氰酸酯、二环己基甲烷二异氰酸酯和六亚甲基二异氰酸酯中的一种或多种。
进一步的,所述溶剂为乙酸乙酯和/或乙酸丁酯。
进一步的,所述基材为PET薄膜、BOPP薄膜、PP薄膜、PI薄膜、PE薄膜或者PVC薄膜中的任意一种。
进一步的,所述底涂层中采用日本曹达T-180E底涂剂。
本发明还公开了一种高内聚UV减粘胶带的制备方法,包括以下步骤:
S1.底涂层的制备:将配制好的T-180E底涂剂涂布于基材的一侧表面,底涂剂涂布厚度<0.2μm,底涂涂布机烘箱温度从60℃呈阶梯状上升到100℃,达到最高温100℃后呈阶梯状逐步下降,涂布后于38℃下熟化。
S2.UV减粘胶层的制备:(1)将UV丙烯酸母胶和溶剂按照质量比混合,搅拌均匀,得到稀释母胶。将稀释母胶、光引发剂和固化剂按照质量比混合均匀,得到混合液,将该混合液平分为2-3等份,得到UV减粘胶前体。分别按照与UV丙烯酸母胶的质量比称取相应质量的阻聚剂并加入到各等份的UV减粘胶前体中形成各层UV减粘胶,如内层UV减粘胶、外层UV减粘胶或者内层UV减粘胶、中间层UV减粘胶、外层UV减粘胶;(2)将配制好的各层UV减粘胶按照最先涂布内层UV减粘胶、再涂布中间层UV减粘胶(如果有中间层的话)、最后涂布外层UV减粘胶的顺序依次用涂布机涂布于底涂层表面,相邻两层UV减粘胶的涂布间隔时间≤8h。各层UV减粘胶的涂布干量为16-20g/m2,涂布机烘箱温度从60℃呈阶梯状上升到110℃,达到最高温110℃后呈阶梯状逐步下降。
S3.高内聚UV减粘胶带的制备:外层UV减粘胶均涂布好后在外层UV减粘胶层上贴附离型膜,然后于48℃下熟化,得到高内聚UV减粘胶带。
进一步的,步骤S1中底涂层于38℃下熟化72-120h。
进一步的,步骤S3中UV减粘胶层于48℃下熟化24-36h。
进一步的,所述涂布方式为微凹涂布、挤出涂布、刮刀涂布中的一种或多种。
与现有技术相比,本发明所达到的有益效果是:1、本发明的UV减粘胶层由除阻聚剂用量不同、其他组分种类和用量均相同的2-3层UV减粘胶先后涂布于所述底涂层上固化形成,由于该复合胶层结构中各胶层中阻聚剂用量不同导致各胶层对UV光固化聚合过程的阻聚程度不同,保证外层UV减粘胶层的减粘效果优异,易于与被贴物分离,内层UV减粘胶层的减粘效果较差且缓慢,在外层UV减粘胶层和基材层之间起到了缓冲作用,保证了UV减粘胶层与基材的粘附性。本发明内层UV减粘胶、外层UV减粘胶或者内层UV减粘胶、中间层UV减粘胶、外层UV减粘胶直接采用相同组分,大分子链在各层间依靠分子间力形成网状结构牢牢锁死,保证了胶层之间的粘附性,使得UV减粘胶层之间不分层。在UV减粘胶层和基材层中间加入特定底涂强化基粘,保证基材层与UV减粘胶层不分层,进而在保证晶圆破损低及残胶少的前提下,解决了UV减粘胶层与基材层分层的问题。
2、同组分UV减粘胶在实际生产过程中简化了制备工艺,投入人力物力减少,大大节约资源。
附图说明
图1为本发明一种高内聚UV减粘胶带的结构示意图。
图中:1-离型膜层,2-外层UV减粘胶层,3-内层UV减粘胶层,4-底涂层,5-基材层。
具体实施方式
下面将对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
本发明使用底涂、UV丙烯酸母胶、固化剂和阻聚剂的型号和购买渠道如下:
底涂剂,T-180E,固含量10%,日本曹达株式会社;
UV丙烯酸母胶,SDJ-191112,固含量37%,韩国三和涂料;
固化剂为异佛尔酮二异氰酸酯和六亚甲基二异氰酸酯以质量比1∶1混合的混合物;
阻聚剂,Effulgence-510,无锡隆成科技有限公司。
实施例1:
S1.底涂层的制备:将1kg的T-180E底涂剂、7.2kg无水乙醇和1.8kg去离子水加入到反应釜中室温下搅拌15min,搅拌机速度为150rpm,得到底涂剂。将配制好的底涂剂涂布于基材的一侧表面,底涂剂涂布厚度0.18μm,底涂涂布机烘箱温度从60℃呈阶梯状上升到100℃,到达最高温100℃后呈阶梯状逐步下降,涂布后于38℃下烘干并熟化。
S2.UV减粘胶层的制备:(1)将1kgUV丙烯酸母胶和50g乙酸乙酯加入到反应釜中室温下搅拌10min,搅拌机速度为350rpm,然后加入12g光引发剂TPO、2g光引发剂184和7g固化剂,室温下搅拌15min,混合均匀后平分为2等份,得到UV减粘胶前体。向其中一份UV减粘胶前体中加入0.10g阻聚剂510,搅拌均匀得到外层UV减粘胶,向另一份UV减粘胶前体中加入0.20g阻聚剂510,搅拌均匀得到内层UV减粘胶;(2)将配制好的内层UV减粘胶涂布在底涂层上,涂布干量为20g/m2,再涂布外层UV减粘胶,涂布干量为20g/m2,两层UV减粘胶的涂布间隔时间为1h。涂布机烘箱温度从60℃呈阶梯状上升到110℃,到达最高温110℃后呈阶梯状逐步下降。
S3.高内聚UV减粘胶带的制备:外层UV减粘胶涂布后,在外层UV减粘胶层上贴附离型膜,然后于48℃下熟化24h,得到高内聚UV减粘胶带。
实施例2:
S1.底涂层的制备:将1kg的T-180E底涂剂、7.2kg无水乙醇和1.8kg去离子水加入到反应釜中室温下搅拌15min,搅拌机速度为150rpm,得到底涂剂。将配制好的底涂剂涂布于基材的一侧表面,底涂剂涂布厚度0.18μm,底涂涂布机烘箱温度从60℃呈阶梯状上升到100℃,到达最高温100℃后呈阶梯状逐步下降,涂布后于38℃下烘干并熟化。
S2.UV减粘胶层的制备:(1)将1kgUV丙烯酸母胶和70g乙酸乙酯加入到反应釜中室温下搅拌10min,搅拌机速度为350rpm,然后加入18g光引发剂TPO、4g光引发剂184和4g固化剂,室温下搅拌15min,混合均匀后平分为2等份,得到UV减粘胶前体。向其中一份UV减粘胶前体中加入0.08g阻聚剂510,搅拌均匀得到外层UV减粘胶,向另一份UV减粘胶前体中加入0.23g阻聚剂510,搅拌均匀得到内层UV减粘胶;(2)将配制好的内层UV减粘胶涂布在底涂层上,涂布干量为20g/m2,再涂布外层UV减粘胶,涂布干量为20g/m2,两层UV减粘胶的涂布间隔时间为7h。涂布机烘箱温度从60℃呈阶梯状上升到110℃,到达最高温110℃后呈阶梯状逐步下降。
S3.高内聚UV减粘胶带的制备:外层UV减粘胶涂布后,在外层UV减粘胶层上贴附离型膜,然后于48℃下熟化24h,得到高内聚UV减粘胶带。
实施例3:
S1.底涂层的制备:将1kg的T-180E底涂剂、7.2kg无水乙醇和1.8kg去离子水加入到反应釜中室温下搅拌15min,搅拌机速度为150rpm,得到底涂剂。将配制好的底涂剂涂布于基材的一侧表面,底涂剂涂布厚度0.18μm,底涂涂布机烘箱温度从60℃呈阶梯状上升到100℃,到达最高温100℃后呈阶梯状逐步下降,涂布后于38℃下烘干并熟化。
S2.UV减粘胶层的制备:(1)将1.5kgUV丙烯酸母胶和75g乙酸乙酯加入到反应釜中室温下搅拌15min,搅拌机速度为350rpm,然后加入18g光引发剂TPO、3g光引发剂184和10.5g固化剂,室温下搅拌15min,混合均匀后平分为3等份,得到UV减粘胶前体。向其中一份UV减粘胶前体中加入0.10g阻聚剂510,搅拌均匀得到外层UV减粘胶,向另一份UV减粘胶前体中加入0.15g阻聚剂510,搅拌均匀得到中间层UV减粘胶,向最后一份UV减粘胶前体中加入0.20g阻聚剂510,搅拌均匀得到内层UV减粘胶;(2)将配制好的内层UV减粘胶涂布在底涂层上,涂布干量为14g/m2,再涂布中间层UV减粘胶,涂布干量为13g/m2,涂布间隔时间为1h,再涂布外层UV减粘胶,涂布干量为13g/m2,涂布间隔时间为1h。涂布机烘箱温度从60℃呈阶梯状上升到110℃,到达最高温110℃后呈阶梯状逐步下降。
S3.高内聚UV减粘胶带的制备:外层UV减粘胶涂布后,在外层UV减粘胶层上贴附离型膜,然后于48℃下熟化36h,得到高内聚UV减粘胶带。
对比例1:
采用实施例1相同的方法制备UV减粘胶带,不同之处在于,底涂采用恒英CNHYBOND-974底涂。
对比例2:
采用实施例1相同的方法制备UV减粘胶带,不同之处在于,步骤S2中形成外层UV减粘胶时向其中一份UV减粘胶前体中加入0.16g阻聚剂510。
对比例3:
采用实施例1相同的方法制备UV减粘胶带,不同之处在于,步骤S2中形成内层UV减粘胶时向其中一份UV减粘胶前体中加入0.16g阻聚剂510。
对比例4:
采用实施例1相同的方法制备UV减粘胶带,不同之处在于,步骤S2中形成内层UV减粘胶时向其中一份UV减粘胶前体中加入0.36g阻聚剂510。
对比例5:
采用实施例1相同的方法制备UV减粘胶带,不同之处在于,步骤S2中两层UV减粘胶的涂布间隔时间为9h。
对比例6:
S1.底涂层的制备:将1kg的T-180E底涂剂、7.2kg无水乙醇和1.8kg去离子水加入到反应釜中室温下搅拌15min,搅拌机速度为150rpm,得到底涂剂。将配制好的底涂剂涂布于基材的一侧表面,底涂剂涂布厚度0.18μm,底涂涂布机烘箱温度从60℃呈阶梯状上升到100℃,到达最高温100℃后呈阶梯状逐步下降,涂布后于38℃下烘干并熟化。
S2.UV减粘胶层的制备:(1)将2kgUV丙烯酸母胶和100g乙酸乙酯加入到反应釜中室温下搅拌20min,搅拌机速度为350rpm,然后加入24g光引发剂TPO、4g光引发剂184和14g固化剂,室温下搅拌15min,混合均匀后平分为4等份,得到UV减粘胶前体。向其中一份UV减粘胶前体中加入0.10g阻聚剂510,搅拌均匀得到外层UV减粘胶,向另一份UV减粘胶前体中加入0.14g阻聚剂510,搅拌均匀得到中间层UV减粘胶1,向另一份UV减粘胶前体中加入0.17g阻聚剂510,搅拌均匀得到中间层UV减粘胶2,向最后一份UV减粘胶前体中加入0.20g阻聚剂510,搅拌均匀得到内层UV减粘胶;(2)将配制好的内层UV减粘胶涂布在底涂层上,涂布干量为10g/m2,再涂布中间层UV减粘胶1,涂布干量为10g/m2,涂布间隔时间为1h,再涂布中间层UV减粘胶2,涂布干量为10g/m2,涂布间隔时间为1h,最后涂布外层UV减粘胶,涂布干量为10g/m2,涂布间隔时间为1h。涂布机烘箱温度从60℃呈阶梯状上升到110℃,到达最高温110℃后呈阶梯状逐步下降。
S3.UV减粘胶带的制备:外层UV减粘胶涂布后,在外层UV减粘胶层上贴附离型膜,然后于48℃下熟化48h,得到UV减粘胶带。
实验
1、反剥离力测试:取实施例1-3、对比例1中得到的高内聚UV减粘胶带,将高内聚UV减粘胶带基材层没有涂胶一侧与市购的高粘力胶带相贴合,再将该高粘力胶带与SUS304贴合,剥去高内聚UV减粘胶带的离型膜层,将UV减粘胶层与剥离力为1500-2000gf/in的单面胶样条贴合,置于65℃/90%RH的烘箱中,3天后取出,冷却至室温后,对UV前后样品进行180°反拉剥离力测试。UV照射条件为:照射时间5s,光强300mJ/cm2,测试结果如下表。
UV前反剥离力(gf/in) | UV后反剥离力(gf/in) | |
实施例1 | 1133 | 1956 |
实施例2 | 1132 | 2107 |
实施例3 | 1208 | 1977 |
对比例1 | 1024 | 2400(脱胶) |
上表中,实施例1-3的基粘高于对比例1的基粘。在UV前后,实施例1-3的反剥离力均发生在贴于UV减粘胶层的单面胶样条与UV减粘胶层之间,而对比例1在UV后的反剥离力发生在UV减粘胶层与基材层之间,即对比例1在UV后反剥离时发生了脱胶现象。这表明本发明所选用的T-180E底涂剂具有良好的增粘效果,在UV后依然可以与基材保持良好的粘合性。
2、180°剥离力测试:取实施例1-3、对比例1-6中得到的高内聚UV减粘胶带,将高内聚UV减粘胶带基材层没有涂胶一侧与市购的高粘力胶带相贴合,再将该高粘力胶带与P023T(23μm的PET膜)相贴合,剥去高内聚UV减粘胶带的离型膜层,将UV减粘胶层贴于SUS板材上,得到测试样品,将样品置于65℃/90%RH的烘箱中,3天后取出冷却至室温后,对UV前后样品进行180°剥离力测试。UV照射条件为:照射时间5s,光强300mJ/cm2,测试结果如下表。
UV前剥离力(gf/in) | UV后剥离力(gf/in) | |
实施例1 | 3217 | 6.04 |
实施例2 | 3206 | 4.04 |
实施例3 | 3478 | 4.68 |
对比例1 | 3001 | 312.12(部分脱胶) |
对比例2 | 3123 | 70.25 |
对比例3 | 3391 | 44.23(脱胶) |
对比例4 | 3267 | 610.67 |
对比例5 | 2982 | 441.02(分层) |
对比例6 | 3128 | 8.22 |
由上表可知,实施例1-3的高内聚UV减粘胶带在UV光照前具有高剥离力,在UV光照后剥离力迅速下降,具有良好的可移除性。而对比例2中外层UV减粘胶层中阻聚剂添加量较多导致UV光照后剥离力较高,减粘效果较差;对比例3中内层UV减粘胶层中阻聚剂添加量较少,导致内层UV减粘胶层在UV光照后也具有较好的减粘效果,UV光照后180°剥离力测试时UV减粘胶层与基材层分离,发生脱胶现象;对比例4中内层UV减粘胶层中阻聚剂添加量较多,导致内层UV减粘胶层在UV光照后交联度不足,胶带过软,与被贴物发生位移;对比例5中相邻两层UV减粘胶层的涂布时间间隔大于8h,导致胶层之间聚合物分子链的缠结不足,UV光照后发生UV减粘胶层之间的分层现象;对比例6中UV减粘胶层的层数设置过多,虽然UV减粘效果尚可,但是增加了涂布工序,增大了人力和能耗的投入。
2、耐老化测试:取实施例1-3、对比例6中得到的高内聚UV减粘胶带,将样条置于48℃烘箱中,30天后取出冷却至室温后将高内聚UV减粘胶带基材层没有涂胶一侧与市购的高粘力胶带相贴合,再将该高粘力胶带与P023T(23μm的PET膜)相贴合,剥去高内聚UV减粘胶带的离型膜层,将UV减粘胶层贴于SUS板材上,得到测试样品,利用紫外灯照射5s,光强300mJ/cm2,进行180°剥离力测试,测试结果如下表。
由上表可知,对比例6中由于UV减粘胶层有4层结构,导致各层UV减粘胶层厚度较薄,胶层耐老化性能较差,导致UV减粘胶带48℃30天后UV后剥离力偏高,减粘效果较差。
4、残胶性能测试:取实施例1-3、对比例1-6中得到的高内聚UV减粘胶带,将样条先放入65℃/90%RH湿度的环境下老化3天,将剥离力<100gf/in硅胶带贴到钢板上,将高内聚UV减粘胶带基材层没有涂胶一侧与市购的高粘力胶带相贴合,再将该高粘力胶带与P023T(23μm的PET膜)相贴合,剥去高内聚UV减粘胶带的离型膜层,将UV减粘胶层贴于硅胶带上,将试样放入65℃/90%RH条件下3天,得到测试样品,利用紫外灯照射5s,光强300mJ/cm2,再在65℃/90%RH条件下以500mm/min快速剥离,电子显微镜下观察PET表面是否有胶丝残留。
实施例1 | 无残胶 |
实施例2 | 无残胶 |
实施例3 | 无残胶 |
对比例1 | 胶点 |
对比例2 | 残胶 |
对比例3 | 胶丝 |
对比例4 | 脱胶 |
对比例5 | 无残胶 |
对比例6 | 无残胶 |
由上表可知,与实施例1-3得到的UV减粘胶带相比,对比例1-4的UV减粘胶带在湿热条件下有残胶风险,即内聚低于实施例1-3得到的UV减粘胶带。
以上所述实施例的各技术特征可以进行任意的组合,为使描述简洁,未对上述实施例中的各个技术特征所有可能的组合穷举,然而,只要这些技术特征的组合不存在矛盾,都应当认为是本说明书记载的范围。
对于本领域的普通技术人员来说,在不脱离本发明构思的前提下,还可以做出若干变形和改进,这些都属于本发明的保护范围,本发明的保护范围以所附权利要求为准。
Claims (12)
1.一种高内聚UV减粘胶带,其特征在于,所述高内聚UV减粘胶带由基材层、基材层上的底涂层、底涂层上的UV减粘胶层和UV减粘胶层上的离型膜层组成,所述UV减粘胶层由原料组分完全相同、但UV光照后粘合性不同的2-3层UV减粘胶先后涂布于所述底涂层上固化形成。
2.根据权利要求1所述的一种高内聚UV减粘胶带,其特征在于,所述UV减粘胶包括以下组份:UV丙烯酸母胶、阻聚剂、光引发剂I、光引发剂II、固化剂以及溶剂。
3.根据权利要求1所述的一种高内聚UV减粘胶带,其特征在于,所述UV减粘胶层包括靠近底涂层的内层UV减粘胶层和靠近离型膜层的外层UV减粘胶层。
4.根据权利要求3所述的一种高内聚UV减粘胶带,其特征在于,所述外层UV减粘胶层和内层UV减粘胶层除阻聚剂外的组成相同,均为:UV丙烯酸母胶、光引发剂I、光引发剂II、固化剂和溶剂的质量比为1000∶(10-20)∶(0-4)∶(3-8)∶(40-80);所述外层UV减粘胶层中UV丙烯酸母胶与阻聚剂的质量比为1000∶(0.1-0.2),内层UV减粘胶层中UV丙烯酸母胶与阻聚剂的质量比为1000∶(0.4-0.6)。
5.根据权利要求1所述的一种高内聚UV减粘胶带,其特征在于,所述UV减粘胶层包括靠近底涂层的内层UV减粘胶层、靠近离型膜层的外层UV减粘胶层以及位于内层UV减粘胶层、外层UV减粘胶层之间的中间层UV减粘胶层。
6.根据权利要求5所述的一种高内聚UV减粘胶带,其特征在于,所述外层UV减粘胶层、中间层UV减粘胶层和内层UV减粘胶层除阻聚剂外的组成相同,均为:UV丙烯酸母胶、光引发剂I、光引发剂II、固化剂和溶剂的质量比为1000∶(10-20)∶(0-4)∶(3-8)∶(40-80);所述外层UV减粘胶层中UV丙烯酸母胶与阻聚剂的质量比为1000∶(0.1-0.2),中间层UV减粘胶层中UV丙烯酸母胶与阻聚剂的质量比为1000∶(0.25-0.35),内层UV减粘胶层中UV丙烯酸母胶与阻聚剂的质量比为1000∶(0.4-0.6)。
7.根据权利要求2所述的一种高内聚UV减粘胶带,其特征在于,所述阻聚剂选自阻聚剂510、阻聚剂701和MEHQ中的至少一种;所述UV丙烯酸母胶的固含量为:30%-40%,在UV光照前剥离力>1200gf/in,在光照强度300mJ/cm2条件下光照5秒后剥离力<20gf/in。
8.根据权利要求2所述的一种高内聚UV减粘胶带,其特征在于,所述光引发剂I为光引发剂TPO和/或光引发剂TMO;所述光引发剂II包括光引发剂184、光引发剂1173、光引发剂907、光引发剂369中的一种或多种。
9.根据权利要求2所述的一种高内聚UV减粘胶带,其特征在于,所述固化剂为改性多异氰酸酯类固化剂,具体为甲苯二异氰酸酯、异佛尔酮二异氰酸酯、二苯基甲烷二异氰酸酯、二环己基甲烷二异氰酸酯和六亚甲基二异氰酸酯中的一种或多种。
10.根据权利要求1所述的一种高内聚UV减粘胶带,其特征在于,所述基材层为PET薄膜、BOPP薄膜、PP薄膜、PI薄膜、PE薄膜或者PVC薄膜中的任意一种;所述底涂层中采用日本曹达T-180E底涂剂。
11.根据权利要求1-10任一项所述的一种高内聚UV减粘胶带的制备方法,其特征在于,包括以下步骤:
S1.底涂层的制备:将配制好的T-180E底涂剂涂布于基材的一侧表面,底涂剂涂布厚度<0.2μm,底涂涂布机烘箱温度从60℃呈阶梯状上升到100℃,达到最高温100℃后呈阶梯状逐步下降,涂布后于38℃下熟化;
S2.UV减粘胶层的制备:(1)将UV丙烯酸母胶和溶剂按照质量比混合,搅拌均匀,得到稀释母胶;将稀释母胶、光引发剂和固化剂按照质量比混合均匀,得到混合液,将该混合液平分为2-3等份,得到UV减粘胶前体;分别按照与UV丙烯酸母胶的质量比称取相应质量的阻聚剂并加入到各等份的UV减粘胶前体中形成各层UV减粘胶;(2)将配制好的各层UV减粘胶按照最先涂布内层UV减粘胶、最后涂布外层UV减粘胶的顺序依次用涂布机涂布于底涂层表面,相邻两层UV减粘胶的涂布间隔时间≤8h,各层UV减粘胶的涂布干量为16-20g/m2,涂布机烘箱温度从60℃呈阶梯状上升到110℃,达到最高温110℃后呈阶梯状逐步下降;
S3.高内聚UV减粘胶带的制备:外层UV减粘胶均涂布好后在外层UV减粘胶层上贴附离型膜,然后于48℃下熟化,得到高内聚UV减粘胶带。
12.根据权利要求11所述的一种高内聚UV减粘胶带的制备方法,其特征在于,所述步骤S1中底涂层于38℃下熟化72-120h;所述步骤S3中UV减粘胶层于48℃下熟化24-36h。
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