CN112280497A - 一种可重工的激光相变粘结胶及制备方法 - Google Patents
一种可重工的激光相变粘结胶及制备方法 Download PDFInfo
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Abstract
本发明公开了一种可重工的激光相变粘结胶及制备方法,由基体橡胶树脂、改性聚氨酯树脂、相变粘结胶、固化剂液和助剂制备而成。本发明提供的可重工的激光相变粘结胶及制备方法,不仅解决传统泡棉胶存在的效率低、无法实现窄边框的缺陷,又解决现有点胶方式易溢胶、不易重工的缺陷,粘接强度大,易固定,激光照射10s以内贴合,可快速粘接固化,效率高,通过石蜡、活性剂等相变材料提供软化粘结点温度,胶层与界面反应性结合键结合,耐候性强,防水性好,兼具非常好的力学强度和缓冲性能,步骤简单、成本低廉,可实现窄边框,重工性好。
Description
技术领域
本发明属于胶技术领域,具体涉及一种可重工的激光相变粘结胶及制备方法。
背景技术
目前对于屏幕封装采用的都是聚氨酯胶或者泡棉胶进行粘结,胶通过点胶作业的方式进行分配,再进行后端固化,量产效率有一定限制,并且不易重工,防水性能比较差,而传统的泡棉胶采用的是人工贴合,效率低,并且不易实现窄边框和重工。
发明内容
为解决现有技术中存在的技术问题,本发明的目的在于提供一种可重工的激光相变粘结胶及制备方法。
为实现上述目的,达到上述技术效果,本发明采用的技术方案为:
一种可重工的激光相变粘结胶,由基体橡胶树脂、改性聚氨酯树脂、相变粘结胶、固化剂液和助剂制备而成,所述基体橡胶树脂由色膏、补强填料、发泡微球和橡胶树脂制备而成,橡胶树脂采用具有高拉伸强度和伸长率的聚烯烃合成橡胶制成。
按质量百分比计,所述激光相变粘结胶包括以下组份:
基体橡胶树脂45-55%
改性聚氨酯树脂5-10%
溶剂型相变粘结胶35-40%
固化剂液1.9-3%
助剂余量。
按质量百分比计,所述基体橡胶树脂包括以下组份:
橡胶树脂90-93%
补强填料2-5%
色膏1-3%
发泡微球余量。
本发明还提供了一种可重工的激光相变粘结胶的制备方法,包括以下步骤:
1)将具有高拉伸强度和伸长率的聚烯烃合成橡胶在150-200℃条件下搅拌,并与有机溶剂进行热熔、冷凝和回流,得到固含40-50%的橡胶树脂,并冷却至室温,密封储存;
2)将聚氨酯与增粘剂和固化剂采用中高速搅拌的方式与有机溶剂进行共混,得到固含40-50%的改性聚氨酯树脂;
3)将低分子量的合成热塑性聚烯烃或天然石蜡与增粘树脂、基体树脂及聚烯烃性能添加剂以高速搅拌的方式进行热熔、冷凝、回流,得到固含50-60%的溶剂型相变粘结胶;
4)将橡胶树脂的活性剂和固化剂研磨分散在有机溶剂中,得到分散好的固化剂液;
5)将色膏、补强填料、发泡微球及橡胶树脂在高速搅拌机中高速搅拌分散,得到分散补强填料和色膏的基体橡胶树脂;
6)将所述基体橡胶树脂、改性聚氨酯树脂、相变粘结胶和固化剂液加入搅拌机,搅拌分散,再加入助剂,充分搅拌,随后过滤和/或脱泡,得到激光粘结胶树脂;
7)将激光粘结胶树脂均匀涂覆于离型膜基材上,烘干,在110-120℃固化,冷却后,覆上膜,收卷,得到所需可重工的激光相变粘结胶;
于90-110℃温度下激光照射不高于20s,激发表面能对产品进行无压力粘结;
于150-160℃温度下激光照射40-50s,对产品进行热剥离;
步骤1)至步骤5)无先后顺序。
步骤1)中,所述聚烯烃合成橡胶包括丁基橡胶、乙丙橡胶、沥青或其他具有不饱和双键的合成橡胶,伸长率大于1500%,拉伸强度大于6Mpa,所述有机溶剂包括甲苯、二甲苯。
步骤3)中,所述天然石蜡熔点为90-100℃。
步骤4)中,所述活性剂为纳米氧化锌、硬脂酸中的一种或两种的组合。
步骤5)中,所述补强填料为气相或沉淀法二氧化硅。
步骤6)中,所述助剂包括消泡剂、流平剂、抗氧剂中的一种或几种的组合。
步骤7)中,将激光粘结胶树脂均匀涂覆于PET离型膜基材上,60℃下预烘干1-2min,再在80-90℃进行烘干5-10min,根据涂覆厚度选择烘干时间,随后在110-120℃固化1-2min,冷却后,覆上膜,收卷,得到所需可重工的激光相变粘结胶。
与现有技术相比,本发明的有益效果为:
本发明公开了一种可重工的激光相变粘结胶及制备方法,由基体橡胶树脂、改性聚氨酯树脂、相变粘结胶、固化剂液和助剂制备而成,所述基体橡胶树脂由色膏、补强填料、发泡微球和橡胶树脂制备而成,橡胶树脂采用具有高拉伸强度和伸长率的聚烯烃合成橡胶制成。本发明提供的可重工的激光相变粘结胶及制备方法,通过一系列合成树脂和功能性原料经涂布工艺合成出一款具有非常好的力学强度和缓冲性能的激光封屏胶膜,采用反应型热熔、热固的方式进行作业(传统点胶为热固胶),采用激光照射、活化(胶面活化温度90-110℃照射10s左右),激发表面能对基材进行无压力粘结,并且在更高的照射、活化温度(150-160℃照射40-50s)下进行热剥离,胶膜冷却后剥离,无残胶,不仅解决了传统泡棉胶存在的效率低、无法实现窄边框的缺陷,又解决了现有点胶方式易溢胶、不易重工的缺陷,该胶膜以传统泡棉压敏胶的形式生产和加工,通过激光照射加热的方式生产,粘接强度大,易固定,激光照射10s以内即可实现贴合,可快速粘接固化,效率高,通过石蜡、活性剂等相变材料提供软化粘结点温度(90-110℃),胶层与界面反应性结合键结合,耐候性强,防水性好,兼具非常好的力学强度和缓冲性能,步骤简单、成本低廉,可实现窄边框,重工性好。
具体实施方式
下面对本发明进行详细阐述,以使本发明的优点和特征能更易于被本领域技术人员理解,从而对本发明的保护范围做出更为清楚明确的界定。
一种可重工的激光相变粘结胶,由基体橡胶树脂、改性聚氨酯树脂、相变粘结胶、固化剂液和助剂制备而成,所述基体橡胶树脂由色膏、补强填料、发泡微球和橡胶树脂制备而成,橡胶树脂采用具有高拉伸强度和伸长率的聚烯烃合成橡胶制成。
按质量百分比计,所述激光相变粘结胶包括以下组份:
基体橡胶树脂45-55%
改性聚氨酯树脂5-10%
溶剂型相变粘结胶35-40%
固化剂液2-3%
助剂余量。
按质量百分比计,所述基体橡胶树脂包括以下组份:
橡胶树脂90-93%
补强填料2-5%
色膏1-3%
发泡微球余量。
本发明还提供了一种可重工的激光相变粘结胶的制备方法,包括以下步骤:
1)将具有高拉伸强度和伸长率的聚烯烃合成橡胶在150-200℃条件下搅拌,并与有机溶剂进行热熔、冷凝和回流,得到固含40-50%的橡胶树脂,并冷却至室温,密封储存;
2)将聚氨酯与增粘剂和固化剂采用中高速搅拌的方式与有机溶剂进行共混,得到固含40-50%的改性聚氨酯树脂;
3)将低分子量的合成热塑性聚烯烃或天然石蜡与增粘树脂、基体树脂及聚烯烃性能添加剂以高速搅拌的方式进行热熔、冷凝、回流,得到固含50-60%的溶剂型相变粘结胶;
4)将橡胶树脂的活性剂和固化剂研磨分散在有机溶剂中,得到分散好的固化剂液;
5)将色膏、补强填料、发泡微球及橡胶树脂在高速搅拌机中高速搅拌分散,得到分散补强填料和色膏的基体橡胶树脂;
6)将所述基体橡胶树脂、改性聚氨酯树脂、相变粘结胶和固化剂液加入搅拌机,搅拌分散,再加入助剂,充分搅拌,随后过滤和/或脱泡,得到激光粘结胶树脂;
7)将激光粘结胶树脂均匀涂覆于离型膜基材上,烘干,在110-120℃固化,冷却后,覆上膜,收卷,得到所需可重工的激光相变粘结胶;
于90-110℃温度下激光照射不高于20s,激发表面能对产品进行无压力粘结;
于150-160℃温度下激光照射40-50s,对产品进行热剥离;
步骤1)至步骤5)无先后顺序。
步骤1)中,所述聚烯烃合成橡胶包括丁基橡胶、乙丙橡胶、沥青或其他具有不饱和双键的合成橡胶,伸长率大于1500%,拉伸强度大于6Mpa,所述有机溶剂包括甲苯、二甲苯。
步骤3)中,所述天然石蜡熔点为90-100℃。
步骤4)中,所述活性剂为纳米氧化锌、硬脂酸中的一种或两种的组合。
步骤5)中,所述补强填料为气相或沉淀法二氧化硅。
步骤6)中,所述助剂包括消泡剂、流平剂、抗氧剂中的一种或几种的组合,按质量分数计,包括消泡剂0.3-1.0%、流平剂0.3-1.0%和\或抗氧剂0.1-0.5%。
步骤7)中,将激光粘结胶树脂均匀涂覆于PET离型膜基材上,60℃下预烘干1-2min,再在80-90℃进行烘干5-10min,根据涂覆厚度选择烘干时间,随后在110-120℃固化1-2min,冷却后,覆上膜,收卷,得到所需可重工的激光相变粘结胶。
实施例1
一种可重工的激光相变粘结胶,由基体橡胶树脂、改性聚氨酯树脂、相变粘结胶、固化剂液和助剂制备而成,所述基体橡胶树脂由色膏、补强填料、发泡微球和橡胶树脂制备而成,橡胶树脂采用具有高拉伸强度和伸长率的聚烯烃合成橡胶制成,原料配比如下表1所示。
一种可重工的激光相变粘结胶的制备方法,包括以下步骤:
1)将具有高拉伸强度和伸长率的聚烯烃合成橡胶在高温下(150-200℃)搅拌,并与甲苯、二甲苯等有机溶剂进行热熔、冷凝、回流,得到固含50%的橡胶树脂,并冷却至室温,密封储存;
2)将热塑性聚氨酯或预聚物与增粘剂和催化剂以上述同样方式进行熔融状态下的冷凝回流、共混,得到固含40%的改性聚氨酯树脂溶液;
3)将低分子量的合成热塑性聚烯烃或者天然石蜡与增粘树脂、基体树脂及聚烯烃性能添加剂(改善流变、补强、浸润),以上述同样方式进行热熔、冷凝回流共混,得到固含50%的溶剂型相变粘结胶;
4)将橡胶树脂的活性剂和固化剂研磨分散在有机溶剂中,得到分散好的固化剂液;
5)将色膏和补强填料以及PP发泡微球及步骤1)所得橡胶树脂在高速搅拌机中高速搅拌分散,得到分散补强填料及色膏的基体橡胶树脂;
6)将上述基体橡胶树脂、改性聚氨酯树脂、(溶剂型)相变粘结胶和固化剂液按一定的比例加入搅拌机,搅拌分散,随后加入一定量的助剂,充分搅拌后,过滤,并脱泡(可选择),得到激光粘结胶树脂;
7)将激光粘结胶树脂均匀涂覆于PET离型膜基材上,60℃预烘干1-2min,随后在80-90℃进行烘干5-10min,根据涂覆厚度选择烘干时间,随后在110-120℃固化1-2min,冷却后,覆上膜,收卷,得到可重工的激光相变粘结胶;
于90-110℃温度下激光照射不高于20s,激发表面能对产品进行无压力粘结;
于150-160℃温度下激光照射40-50s,对产品进行热剥离。
实施例2
一种可重工的激光相变粘结胶,由基体橡胶树脂、改性聚氨酯树脂、相变粘结胶、固化剂液和助剂制备而成,所述基体橡胶树脂由色膏、补强填料、发泡微球和橡胶树脂制备而成,橡胶树脂采用具有高拉伸强度和伸长率的聚烯烃合成橡胶制成,原料配比如下表2所示。
表2
余同实施例1。
对比例1为市购的泡棉胶。
对比例2为市购的粘结胶。
实施例1与对比例1-2的性能对比结果如表3所示。
表3
实施例1-2的性能测试结果如下表4所示。
表4
本发明未详细说明的部分采用现有技术即可实现,在此不做赘述。
以上所述仅为本发明的实施例,并非因此限制本发明的专利范围,凡是利用本发明说明书内容所作的等效结构或等效流程变换,或直接或间接运用在其他相关的技术领域,均同理包括在本发明的专利保护范围内。
Claims (10)
1.一种可重工的激光相变粘结胶,其特征在于,由基体橡胶树脂、改性聚氨酯树脂、相变粘结胶、固化剂液和助剂制备而成,所述基体橡胶树脂由色膏、补强填料、发泡微球和橡胶树脂制备而成,橡胶树脂采用具有高拉伸强度和伸长率的聚烯烃合成橡胶制成。
2.根据权利要求1所述的一种可重工的激光相变粘结胶,其特征在于,按质量百分比计,所述激光相变粘结胶包括以下组份:
基体橡胶树脂 45-55%
改性聚氨酯树脂 5-10%
溶剂型相变粘结胶 35-40%
固化剂液 1.9-3%
助剂 余量。
3.根据权利要求1所述的一种可重工的激光相变粘结胶,其特征在于,按质量百分比计,所述基体橡胶树脂包括以下组份:
橡胶树脂 90-93%
补强填料 2-5%
色膏 1-3%
发泡微球 余量。
4.根据权利要求1-3任一所述的一种可重工的激光相变粘结胶的制备方法,其特征在于,包括以下步骤:
1)将具有高拉伸强度和伸长率的聚烯烃合成橡胶在150-200℃条件下搅拌,并与有机溶剂进行热熔、冷凝和回流,得到固含40-50%的橡胶树脂,并冷却至室温,密封储存;
2)将聚氨酯与增粘剂和固化剂采用中高速搅拌的方式与有机溶剂进行共混,得到固含40-50%的改性聚氨酯树脂;
3)将低分子量的合成热塑性聚烯烃或天然石蜡与增粘树脂、基体树脂及聚烯烃性能添加剂以高速搅拌的方式进行热熔、冷凝、回流,得到固含50-60%的溶剂型相变粘结胶;
4)将橡胶树脂的活性剂和固化剂研磨分散在有机溶剂中,得到分散好的固化剂液;
5)将色膏、补强填料、发泡微球及橡胶树脂在高速搅拌机中高速搅拌分散,得到分散补强填料和色膏的基体橡胶树脂;
6)将所述基体橡胶树脂、改性聚氨酯树脂、相变粘结胶和固化剂液加入搅拌机,搅拌分散,再加入助剂,充分搅拌,随后过滤和/或脱泡,得到激光粘结胶树脂;
7)将激光粘结胶树脂均匀涂覆于离型膜基材上,烘干,在110-120℃固化,冷却后,覆上膜,收卷,得到所需可重工的激光相变粘结胶;
于90-110℃温度下激光照射不高于20s,激发表面能对产品进行无压力粘结;
于150-160℃温度下激光照射40-50s,对产品进行热剥离;
步骤1)至步骤5)无先后顺序。
5.根据权利要求4所述的一种可重工的激光相变粘结胶的制备方法,其特征在于,步骤1)中,所述聚烯烃合成橡胶包括丁基橡胶、乙丙橡胶、沥青或其他具有不饱和双键的合成橡胶,伸长率大于1500%,拉伸强度大于6Mpa,所述有机溶剂包括甲苯、二甲苯。
6.根据权利要求4所述的一种可重工的激光相变粘结胶的制备方法,其特征在于,步骤3)中,所述天然石蜡熔点为90-100℃。
7.根据权利要求4所述的一种可重工的激光相变粘结胶的制备方法,其特征在于,步骤4)中,所述活性剂为纳米氧化锌、硬脂酸中的一种或两种的组合。
8.根据权利要求4所述的一种可重工的激光相变粘结胶的制备方法,其特征在于,步骤5)中,所述补强填料为气相或沉淀法二氧化硅。
9.根据权利要求4所述的一种可重工的激光相变粘结胶的制备方法,其特征在于,步骤6)中,所述助剂包括消泡剂、流平剂、抗氧剂中的一种或几种的组合。
10.根据权利要求4所述的一种可重工的激光相变粘结胶的制备方法,其特征在于,步骤7)中,将激光粘结胶树脂均匀涂覆于PET离型膜基材上,60℃下预烘干1-2min,再在80-90℃进行烘干5-10min,根据涂覆厚度选择烘干时间,随后在110-120℃固化1-2min,冷却后,覆上膜,收卷,得到所需可重工的激光相变粘结胶。
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CN111500214A (zh) * | 2020-05-22 | 2020-08-07 | 广东弘擎电子材料科技有限公司 | 压敏胶黏剂、压敏胶黏剂的制备方法与耐高温保护膜 |
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