CN112759779A - 一种超柔离型膜及其制备方法 - Google Patents
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Abstract
本发明公开了一种超柔离型膜及其制备方法,该离型膜从下至上依次包括PET离型膜层、超柔基材层及有机硅离型层,其中,有机硅离型层按重量份数包括如下原料:乙烯基二甲基硅油10‑30份,含氢硅油5‑10份,催化剂1‑5份、稀释剂45‑64份和改性剂10‑30份;制备时分别依次制得涂覆液进行涂覆形成。本发明通过采用PET离型膜层、超柔基材层和有机硅离型层组成,有利于使该超柔离型膜具有着优异的离型性能,表面张力低,离型力在产品柔韧,优异的拉伸强度,弯曲无折痕等特点,可应用于一些特殊领域,使用范围广。
Description
技术领域
本发明属于超柔离型膜领域,特别涉及一种超柔离型膜及其制备方法。
背景技术
离型膜,又称剥离膜、隔离膜、分离膜、阻胶膜、离形膜、薄膜、塑料薄膜、掩孔膜、硅油膜、硅油纸、防粘膜、型纸、打滑膜、天那纸、离型纸、silliconfilm、release film、release、无纺布膜;通常情况下为了增加塑料薄膜的离型力,会将塑料薄膜做等离子处理,或涂氟处理,或涂硅(silicone)离型剂于薄膜材质的表层上,如PET、PE、OPP,等等;让它对于各种不同的有机压感胶(如热融胶、亚克力胶和橡胶系的压感胶)可以表现出极轻且稳定的离型力。根据不同所需离型膜离型力,隔离产品胶的粘性不同,离型力相对应调整,使之在剥离时达到极轻且稳定的离型力。
然而,现有的超柔离型膜为PET为基材的有机硅离型膜,有一定的挺度,弯折后反弹等特点,不适合一些需要柔性离型材料的使用。
因此,发明一种超柔离型膜来解决上述问题很有必要。
发明内容
发明目的:本发明的第一目的是提供一种具有优异的离型性能、较好表面张力的超柔离型膜;
本发明的第二目的是提供上述离型膜的制备方法。
技术方案:本发明的超柔离型膜,该离型膜从下至上依次包括PET离型膜层、超柔基材层及有机硅离型层;其中,所述有机硅离型层按重量份数包括如下原料:乙烯基二甲基硅油10-30份,含氢硅油5-10份,催化剂1-5份、稀释剂45-64份和改性剂10-30份;其中,改性剂为丙烯酸(酯)单体,该丙烯酸(酯)单体按重量份数包括甲基丙烯酸甲酯20-30份、丙烯酸15-20份、丙烯酸丁酯20-25份和苯乙烯45-50份。
本发明通过使用丙烯酸(酯)单体对有机硅离型层的有机硅进行改性,有效的增加有机硅的表面张力,从而使制备得到的有机硅离型层具有较好的表面张力,使该超柔离型膜具有较强的柔性,适用范围广,使用寿命长。
进一步说,所述超柔基材层由柔性材料形成,其中,柔性材料为热塑性聚氨酯材料、聚氨酯材料或高密度聚乙烯材料。
进一步说,所述催化剂为铂金催化剂或过氧化苯甲酰。
进一步说,所述稀释剂为丁酮或异丙酸。
本发明制备上述超柔离型膜的方法,包括如下步骤:
(1)将低黏度乙烯基硅油、高黏度乙烯基硅油、含氢硅油、氟硅树脂、铂催化剂、过氧化苯甲酰装入搅拌釜中搅拌均匀,再抽真空脱去气泡,制得改性硅油,随后将改性硅油、过氧化苯甲酰和异丙酸在70-80℃下搅拌30-40min,并静置24-30h,待气泡完全消失后得离型剂;将PET离型膜作为基材,涂布上述离型剂,并依次经过热固化、光固化处理,制得PET离型膜层;
(2)将柔性材料高温熔化后,在PET离型膜层上涂覆该柔性材料,形成超柔基材层;
(3)按重量份数将乙烯基二甲基硅油、含氢硅油和丙烯酸(酯)单体搅拌混合,加入2-3份催化剂水浴加热至60-80℃后,加入稀释剂,保温反应1-1.5h,升温至85-90℃,加入剩余的催化剂,升温90-100℃保温1-1.5h,制得合成产物;
(4)将上述合成产物烘干后,抽提除去体系中的丙烯酸(酯)的自聚物,再烘干,并配制成有机硅涂布液,涂覆于超柔基材层形成有机硅离型层。
再进一步说,步骤(1)中,所述低黏度乙烯基硅油60~80份、高黏度乙烯基硅油6~8份、含氢硅油4~6份、氟硅树脂3~5份、铂催化剂1~1.2份、过氧化苯甲酰0.1~0.2份。
再进一步说,步骤(1)中,所述改性硅油、过氧化苯甲酰和异丙酸的质量比为1:0.2-0.5:0.6-0.8。
再进一步说,所述有机硅涂布液的涂布速度为40-60m/min。
有益效果:与现有技术相比,本发明的显著优点为:该离型膜通过采用PET离型膜层、超柔基材层和有机硅离型层组成,使得该超柔离型膜具有优异的离型性能、表面张力、及离型力,具有优异的柔韧,拉伸强度和弯曲无折痕等特点。
具体实施方式
下面结合实施例对本发明的技术方案做进一步详细说明。本发明采用的原料均可从市场上购买获得。
实施例1
该实施例的超柔离型膜采用PET离型膜层、超柔基材层和有机硅离型层组成。其中,PET离型膜层采用PET离型膜为基材,采用淋膜机涂覆一层柔性材料形成超柔基材层,采用涂布机在超柔基材层表面涂布有机硅离型剂形成有机硅离型层。柔性材料为热塑性聚氨酯材料、聚氨酯材料或高密度聚乙烯材料,且覆膜厚度为5-1000um。PET离型膜的离型力为100g/25mm或150g/25mm。有机硅离型层采用以下重量份数原料组成:乙烯基二甲基硅油10份,含氢硅油10份,催化剂1份、稀释剂64份和改性剂15份。催化剂为铂金催化剂或过氧化苯甲酰。稀释剂为丁酮或异丙酸。改性剂为丙烯酸(酯)单体,该丙烯酸(酯)单体为甲基丙烯酸甲酯20份、丙烯酸15份、丙烯酸丁酯20份和苯乙烯45份。
该超柔离型膜的制备方法包括以下步骤:
(1)取低黏度乙烯基硅油70份、高黏度乙烯基硅油7份、含氢硅油5份、氟硅树脂4份、铂催化剂1.1份、过氧化苯甲酰0.1份装入搅拌釜中搅拌均匀,再抽真空脱去气泡,得改性硅油;将改性硅油、过氧化苯甲酰和异丙酸质量比为1:0.3:0.7在70-80℃下搅拌30-40min,并静置24-30h,待气泡完全消失后得离型剂;
(2)将PET离型膜作为基材,表面进行电晕处理,再用涂布机在薄膜基材表面涂布离型剂,并依次经过热固化、光固化处理,得PET离型膜层;
(3)将柔性材料高温熔化,采用淋膜机涂覆一层形成超柔基材层;
(4)按配方将乙烯基二甲基硅油、含氢硅油和丙烯酸(酯)单体装入到装有温度计、搅拌器、回流冷凝管的反应釜中,搅拌混合,然后加入催化剂完全溶解后一半装入反应釜中,同时用水浴加热,加热至80℃后,将稀释剂匀速加入,保持温度反应1h,然后提高反应釜的温度至90℃,将剩余的催化剂倒入反应釜中,控制滴加速度将溶液于3h匀速滴完,滴加结束后升温95℃保温1h,使剩余的催化剂完全消耗,制得合成产物;
(5)将上述合成产物至于60℃的烘箱内烘干48h至恒重,取出置于抽提机,用乙醇抽提72h,除去体系中的丙烯酸(酯)的自聚物,抽提后再次将样品放在60℃的烘箱内干燥48h至恒重,将合成乳液配制成涂布液,使用网纹式涂布机在超柔基材层上涂布,涂布速度为60m/min,烘箱温度为150℃,涂布获得有机硅离型层。
实施例2
该实施例的有机硅离型层采用以下重量份数原料组成:乙烯基二甲基硅油20份,含氢硅油7份,催化剂3份、稀释剂50份和改性剂30份。改性剂为丙烯酸(酯)单体,所述丙烯酸(酯)单体为甲基丙烯酸甲酯25份、丙烯酸18份、丙烯酸丁酯22份和苯乙烯48份。
该超柔离型膜的制备方法包括以下步骤:
(1)取低黏度乙烯基硅油60份、高黏度乙烯基硅油6份、含氢硅油4份、氟硅树脂3份、铂催化剂1份、过氧化苯甲酰0.1份装入搅拌釜中搅拌均匀,再抽真空脱去气泡,得改性硅油;将改性硅油、过氧化苯甲酰和异丙酸质量比为1:0.2:0.6在70-80℃下搅拌30-40min,并静置24-30h,待气泡完全消失后得离型剂;
(2)将PET离型膜作为基材,表面进行电晕处理,再用涂布机在薄膜基材表面涂布离型剂,并依次经过热固化、光固化处理,得PET离型膜层;
(3)将柔性材料高温熔化,采用淋膜机涂覆一层形成超柔基材层;
(4)按配方将乙烯基二甲基硅油、含氢硅油和丙烯酸(酯)单体装入到装有温度计、搅拌器、回流冷凝管的反应釜中,搅拌混合,然后将催化剂完全溶解后部分装入反应釜中,同时用水浴加热,加热至80℃后,将稀释剂匀速加入,保持温度反应1h,然后提高反应釜的温度至90℃,将剩余的催化剂倒入反应釜中,控制滴加速度将溶液于3h匀速滴完,滴加结束后升温95℃保温1h,使剩余的催化剂完全消耗,制得合成产物;
(5)将上述合成产物至于60℃的烘箱内烘干48h至恒重,取出置于抽提机,用乙醇抽提72h,除去体系中的丙烯酸(酯)的自聚物,抽提后再次将样品放在60℃的烘箱内干燥48h至恒重,将合成乳液配制成涂布液,使用网纹式涂布机在超柔基材层上涂布,涂布速度为50m/min,烘箱温度为150℃,涂布获得有机硅离型层。
实施例3
该实施例的有机硅离型层采用以下重量份数原料组成:乙烯基二甲基硅油30份,含氢硅油5份,催化剂5份、稀释剂45份和改性剂10份。改性剂为丙烯酸(酯)单体,所述丙烯酸(酯)单体为甲基丙烯酸甲酯30份、丙烯酸20份、丙烯酸丁酯25份和苯乙烯50份。
该超柔离型膜的制备方法包括以下步骤:
(1)取低黏度乙烯基硅油80份、高黏度乙烯基硅油8份、含氢硅油6份、氟硅树脂5份、铂催化剂1.2份、过氧化苯甲酰0.2份装入搅拌釜中搅拌均匀,再抽真空脱去气泡,得改性硅油;将改性硅油、过氧化苯甲酰和异丙酸按质量比1:0.5:0.8在70-80℃下搅拌30-40min,并静置24-30h,待气泡完全消失后得离型剂;
(2)将PET离型膜作为基材,表面进行电晕处理,再用涂布机在薄膜基材表面涂布离型剂,并依次经过热固化、光固化处理,得PET离型膜层;
(3)将柔性材料高温熔化,采用淋膜机涂覆一层形成超柔基材层;
(4)按配方将乙烯基二甲基硅油、含氢硅油和丙烯酸(酯)单体装入到装有温度计、搅拌器、回流冷凝管的反应釜中,搅拌混合,然后将催化剂完全溶解后部分装入反应釜中,同时用水浴加热,加热至80℃后,将稀释剂匀速加入,保持温度反应1h,然后提高反应釜的温度至90℃,将剩余的催化剂倒入反应釜中,控制滴加速度将溶液于3h匀速滴完,滴加结束后升温95℃保温1h,使剩余的催化剂完全消耗,得到合成产物;
(5)将上述合成产物至于60℃的烘箱内烘干48h至恒重,取出置于抽提机,用乙醇抽提72h,除去体系中的丙烯酸(酯)的自聚物,抽提后再次将样品放在60℃的烘箱内干燥48h至恒重,将合成乳液配制成涂布液,使用网纹式涂布机在超柔基材层上涂布,涂布速度为60m/min,烘箱温度为150℃,涂布制得有机硅离型层。
Claims (8)
1.一种超柔离型膜,其特征在于:该离型膜从下至上依次包括PET离型膜层、超柔基材层及有机硅离型层;其中,所述有机硅离型层按重量份数包括如下原料:乙烯基二甲基硅油10-30份,含氢硅油5-10份,催化剂1-5份、稀释剂45-64份和改性剂10-30份;其中,改性剂为丙烯酸(酯)单体,该丙烯酸(酯)单体按重量份数包括甲基丙烯酸甲酯20-30份、丙烯酸15-20份、丙烯酸丁酯20-25份和苯乙烯45-50份。
2.根据权利要求1所述的超柔离型膜,其特征在于:所述超柔基材层由柔性材料形成,其中,柔性材料为热塑性聚氨酯材料、聚氨酯材料或高密度聚乙烯材料。
3.根据权利要求1所述的超柔离型膜,其特征在于:所述催化剂为铂金催化剂或过氧化苯甲酰。
4.根据权利要求1所述的超柔离型膜,其特征在于:所述稀释剂为丁酮或异丙酸。
5.一种制备权利要求1所述超柔离型膜的方法,其特征在于包括如下步骤:
(1)将低黏度乙烯基硅油、高黏度乙烯基硅油、含氢硅油、氟硅树脂、铂催化剂、过氧化苯甲酰装入搅拌釜中搅拌均匀,再抽真空脱去气泡,制得改性硅油,随后将改性硅油、过氧化苯甲酰和异丙酸在70-80℃下搅拌30-40min,并静置24-30h,待气泡完全消失后得离型剂;将PET离型膜作为基材,涂布上述离型剂,并依次经过热固化、光固化处理,制得PET离型膜层;
(2)将柔性材料高温熔化后,在PET离型膜层上涂覆该柔性材料,形成超柔基材层;
(3)按重量份数将乙烯基二甲基硅油、含氢硅油和丙烯酸(酯)单体搅拌混合,加入部分催化剂水浴加热至60-80℃后,加入稀释剂,保温反应1-1.5h,升温至85-90℃,加入剩余的催化剂,升温90-100℃保温1-1.5h,制得合成产物;
(4)将上述合成产物烘干后,抽提除去体系中的丙烯酸(酯)的自聚物,再烘干,并配制成有机硅涂布液,涂覆于超柔基材层形成有机硅离型层。
6.根据权利要求5所述制备超柔离型膜的方法,其特征在于:步骤(1)中,所述低黏度乙烯基硅油60-80份、高黏度乙烯基硅油6-8份、含氢硅油4-6份、氟硅树脂3-5份、铂催化剂1-1.2份、过氧化苯甲酰0.1-0.2份。
7.根据权利要求5所述制备超柔离型膜的方法,其特征在于:步骤(1)中,所述改性硅油、过氧化苯甲酰和异丙酸的质量比为1:0.2-0.5:0.6-0.8。
8.根据权利要求5所述制备超柔离型膜的方法,其特征在于:步骤(1)中,所述有机硅涂布液的涂布速度为40-60m/min。
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