CN113416497A - 一种分段热减粘保护膜及其制备方法 - Google Patents
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Abstract
本发明公开了一种分段热减粘保护膜及其制备方法,包括依次贴合的基材层、减粘层和离型层,其中减粘层由减粘胶组合物涂布于基材层表面制成,减粘胶组合物包括如下重量份数的各组分:丙烯酸酯压敏胶树脂10‑50份、固化剂0.3‑2份、两种发泡温度至少相差30℃的发泡微球共2‑5份以及溶剂25‑60份。本发明制备过程中使用了两种发泡温度不同的微球,先加热到一定范围,失去一部分粘性,使用后继续加热至完全失去粘性。便于产品加工,使用后失粘充分,易于剥离,避免产生残胶。
Description
技术领域
本发明涉及一种分段热减粘保护膜及其制备方法,属于加工工艺处理技术领域。
背景技术
在微小元器件如晶片研磨、各种硅片、封装基板、陶瓷、玻璃、水晶精细电子零件、玻璃、金属板等进行加工时,通常需要采用胶带为其固定,避免在切割工艺中由于元器件移动导致损坏。此外,在蚀刻、冲洗、或涂装工艺中,需要打磨某元器件的局部表面时,为了保护不需要加工的其他部分不受影响,也会采用胶带先遮住不需要加工的部位,待加工完成后再剥离。
但是用于固定或者遮廠的胶带,其粘贴强度需要较高,在加工时要求较高的剥离力,而在检取时如果剥离力太大容易在拆除胶带时发生损坏元器件的状况,而如果粘贴力过小,则容易无法完全固定,现有技术采用的胶带进行处理,固定时胶带保持高粘度,保证元器件固定稳固,切割完成后进行加热,使用前后剥离强度存在不平衡,使用前剥离强度不够,或使用时剥离难,加热导致压敏胶和基膜的粘结强度同样下降,导致压敏胶与基膜的脱离造成残胶。
发明内容
本发明的目的在于克服现有技术中的不足,提供一种分段热减粘保护膜及其制备方法,实现分段减粘,便于产品加工,使用后失粘充分,易于剥离,不留残胶。
为达到上述目的,本发明所采用的技术方案是:
第一方面,本发明提供一种分段热减粘保护膜,包括依次贴合的基材层、减粘层和离型层,所述减粘层由减粘胶组合物涂布于基材层表面制成, 所述减粘胶组合物包括如下重量份数的各组分:丙烯酸酯压敏胶树脂10-50份、固化剂0.3-2份、两种发泡温度至少相差30℃的发泡微球共2- 5份、溶剂25-60份;
所述基材层为PET材料,所述离型层为PET离型膜。
结合第一方面,进一步的,所述基材层的厚度为50-100μm,离型层的厚度为25-50μm。
进一步的,所述丙烯酸酯压敏胶树脂为丙烯酸甲酯、丙烯酸乙酯、丙烯酸和丙烯酸羟乙酯按照40-50:30-40:1-2:0.6-2质量比的共聚物。
进一步的,所述固化剂为甲苯二异氰酸酯。
进一步的,所述发泡微球其中一种发泡温度范围为70-90℃,另一种发泡温度范围为120-140℃。
进一步的,所述溶剂为乙酸乙酯。
进一步的,所述发泡微球的球壳为丙烯酸酯聚合物,所述发泡微球的内部含有4-8个碳原子的烷烃。
第二方面,本发明提供一种分段热减粘保护膜的制备方法,包括如下步骤:
将丙烯酸酯压敏胶树脂、发泡微球和溶剂混合后,不小于500r/min条件下搅拌至少10min得到混合物;
将交联剂加入至混合物中,不小于500r/min条件下搅拌至少20min,得到热减粘胶组合物;
将热减粘胶组合物涂布于基材层上,控制热减粘胶组合物厚度在20-50μm,在热减粘胶组合物上方覆上离型膜,50-60℃烘烤至少两天,得到分段热减粘保护膜。
与现有技术相比,本发明所达到的有益效果:
本发明使用的丙烯酸酯压敏胶树脂采用不同质量比的共聚物,发泡微球采用两种发泡温度不同的微球,通过本发买那个提供的制备方法所制得的保护膜,使用时先加热到一定范围,失去一部分粘性,使用后,可继续加热至完全失去粘性。便于产品加工,使用后失粘充分,易于剥离,避免残胶。
附图说明
图1是本发明实施例一种分段热减粘保护膜结构图。
具体实施方式
下面对本发明作进一步描述。以下实施例仅用于更加清楚地说明本发明的技术方案,而不能以此来限制本发明的保护范围。
如图1所示,为本发明实施例一种分段热减粘保护膜结构图,包括依次贴合的基材层、减粘层和离型层,减粘层由减粘胶组合物涂布于基材层表面制成,其中减粘胶组合物包括如下重量份数的各组分:丙烯酸酯压敏胶树脂10-50份、固化剂0.3-2份、两种发泡温度至少相差30℃的发泡微球共2- 5份、溶剂25-60份。
基材层为PET材料,厚度为50-100μm,离型层为PET离型膜,厚度为25-50μm;丙烯酸酯压敏胶树脂为丙烯酸甲酯、丙烯酸乙酯、丙烯酸和丙烯酸羟乙酯按照40-50:30-40:1-2:0.6-2质量比的共聚物;固化剂为甲苯二异氰酸酯,溶剂为乙酸乙酯。
在实施例1-3中,发泡微球的球壳为丙烯酸酯聚合物,发泡微球的内部含有低沸点烷烃,选用4-8个碳原子的烷烃。发泡微球选用阿克苏诺贝尔高效化学品有限公司生产的031DU40、051DU40、053DU40、920DU80、093DU120、930DU120其中的两种,且两种发泡温度至少相差30℃的发泡微球共2- 5份,其中一种发泡温度范围为70-90℃,另一种发泡温度范围为120-140℃。
本发明还提供一种分段热减粘保护膜制备方法,具体包括如下步骤:
将丙烯酸酯压敏胶树脂、发泡微球和溶剂混合后,不小于500r/min条件下搅拌至少10min得到混合物;
将交联剂加入至混合物中,不小于500r/min条件下搅拌至少20min,得到热减粘胶组合物;
将热减粘胶组合物涂布于基材层上,控制热减粘胶组合物厚度在20-50μm,在热减粘胶组合物上方覆上离型膜,50-60℃烘烤至少两天,得到分段热减粘保护膜。
实施例1
本发明的实施例1提供一种含有热减粘胶的保护膜,包括基材层、减粘层和离型层;减粘层包括以下重量份的原料: 50份丙烯酸树脂、0.3份固化剂、1份发泡微球1,1份发泡微球2,以及25份溶剂;
其中,丙烯酸树脂为丙烯酸甲酯、丙烯酸乙酯、丙烯酸和丙烯酸羟乙酯的按照40:30:1:0.6质量比的共聚物。
固化剂为甲苯二异氰酸酯,溶剂为乙酸乙酯。
发泡微球球壳为丙烯酸酯聚合物,内部含有低沸点的烷烃,使用两种发泡微球,一种发泡温度在70-90℃,另一种发泡温度在120-140℃。
上述组分热减粘胶的制备方法如下:
第一步、将丙烯酸酯压敏胶树脂和发泡微球、溶剂混合后,于500r/min条件下搅拌10min。
第二步、将交联剂加入至混合物中,500r/min搅拌20min,得热减粘胶混合物
第三步、将热减粘胶组合物采用涂布装置涂布于基材层上,控制干胶厚度在20-30μm,覆上离型膜,50℃烘烤两天,既得分段热减粘保护膜。
实施例2
本发明的实施例2提供一种新型含有热减粘胶的保护膜,包括基材层、减粘层和离型层;减粘层包括以下重量份的原料:40份丙烯酸树脂、1份固化剂、1份发泡微球1,2份发泡微球2,以及40份溶剂;该分段热减粘保护膜由如下步骤制成:
丙烯酸树脂为丙烯酸甲酯、丙烯酸乙酯、丙烯酸和丙烯酸羟乙酯的50:40:2:2的共聚物。
固化剂为甲苯二异氰酸酯。
发泡微球球壳为丙烯酸酯聚合物,内部含有低沸点的烷烃,使用两种发泡微球,一种发泡温度在70-90℃,另一种发泡温度在120-140℃。
溶剂为乙酸乙酯。
上述减粘层的制备方法为:
第一步、将丙烯酸酯压敏胶树脂和发泡微球、溶剂混合后,于500r/min条件下搅拌10min。
第二步、将交联剂加入至混合物中,500r/min搅拌20min,得热减粘胶混合物
第三步、将热减粘胶组合物采用涂布装置涂布于基材层上,控制干胶厚度在30-40μm,覆上离型膜,55℃烘烤两天,既得分段热减粘保护膜。
实施例3
本发明的实施例3提供一种新型含有热减粘胶的保护膜,包括基材层、减粘层和离型层;减粘层包括以下重量份的原料:10份丙烯酸树脂、2份固化剂、2份发泡微球1,3份发泡微球2,以及60份溶剂;该分段热减粘保护膜由如下步骤制成:
丙烯酸树脂为丙烯酸甲酯、丙烯酸乙酯、丙烯酸和丙烯酸羟乙酯按照质量比为45:32:1.6:0.8的共聚物。
固化剂为甲苯二异氰酸酯,溶剂为乙酸乙酯。
发泡微球球壳为丙烯酸酯聚合物,内部含有低沸点的烷烃,使用两种发泡微球,一种发泡温度在70-90℃范围内,另一种发泡温度在120-140℃范围内。
上述减粘层的制备方法为:
第一步、将丙烯酸酯压敏胶树脂和两种发泡微球、溶剂混合后,于500r/min条件下搅拌10min。
第二步、将交联剂加入至混合物中,500r/min搅拌20min,得热减粘胶混合物
第三步、将热减粘胶组合物采用涂布装置涂布于基材层上,控制干胶厚度在40-50μm,覆上离型膜,60℃烘烤两天,制得分段热减粘保护膜。
实施例1-3所制得的分段热减粘保护膜分别进行剥离力测试,具体结果如表1所示:
表1:分段热减粘保护膜剥离力
项目 | 常温剥离力/(g/25mm) | 100℃烘烤10min后剥离/(g/25mm) | 140℃烘烤10min后剥离/(g/25mm) |
实施例1 | 2500-3000 | 1000-1500 | <10 |
实施例2 | 1500-2000 | 800-1200 | <10 |
实施例3 | 1000-1500 | 500-800 | <10 |
从表1剥离力测试的数据可知:通过添加两种不同发泡温度的微球,保护膜能够在100℃失去一部分粘性,140℃几乎完全失去粘性的效果,实现了分段热减粘的效果。
以上所述仅是本发明的优选实施方式,应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明技术原理的前提下,还可以做出若干改进和变形,这些改进和变形也应视为本发明的保护范围。
Claims (8)
1. 一种分段热减粘保护膜,其特征在于,包括依次贴合的基材层、减粘层和离型层,所述减粘层由减粘胶组合物涂布于基材层表面制成, 所述减粘胶组合物包括如下重量份数的各组分:丙烯酸酯压敏胶树脂10-50份、固化剂0.3-2份、两种发泡温度至少相差30℃的发泡微球共2- 5份、溶剂25-60份;
所述基材层为PET材料,所述离型层为PET离型膜。
2.根据权利要求1所述的一种分段热减粘保护膜,其特征在于,所述基材层的厚度为50-100μm,离型层的厚度为25-50μm。
3.根据权利要求1所述的一种分段热减粘保护膜,其特征在于,所述丙烯酸酯压敏胶树脂为丙烯酸甲酯、丙烯酸乙酯、丙烯酸和丙烯酸羟乙酯按照40-50:30-40:1-2:0.6-2质量比的共聚物。
4.根据权利要求1所述的一种分段热减粘保护膜,其特征在于,所述固化剂为甲苯二异氰酸酯。
5.根据权利要求1所述的一种分段热减粘保护膜,其特征在于,所述发泡微球其中一种发泡温度范围为70-90℃,另一种发泡温度范围为120-140℃。
6.根据权利要求1所述的一种分段热减粘保护膜,其特征在于,所述溶剂为乙酸乙酯。
7.根据权利要求1所述的一种分段热减粘保护膜,其特征在于,所述发泡微球的球壳为丙烯酸酯聚合物,所述发泡微球的内部含有4-8个碳原子的烷烃。
8.根据权利要求1-7任一所述一种分段热减粘保护膜的制备方法,其特征在于,包括如下步骤:
将丙烯酸酯压敏胶树脂、发泡微球和溶剂混合后,不小于500r/min条件下搅拌至少10min得到混合物;
将交联剂加入至混合物中,不小于500r/min条件下搅拌至少20min,得到热减粘胶组合物;
将热减粘胶组合物涂布于基材层上,控制热减粘胶组合物厚度在20-50μm,在热减粘胶组合物上方覆上离型膜,50-60℃烘烤至少两天,得到分段热减粘保护膜。
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