CN111334216A - 一种双重减粘膜 - Google Patents
一种双重减粘膜 Download PDFInfo
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- CN111334216A CN111334216A CN202010177708.XA CN202010177708A CN111334216A CN 111334216 A CN111334216 A CN 111334216A CN 202010177708 A CN202010177708 A CN 202010177708A CN 111334216 A CN111334216 A CN 111334216A
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- C—CHEMISTRY; METALLURGY
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- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
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Abstract
本发明公开了一种双重减粘膜,包括依次贴合的基材层、减粘层和离型层;基材层为PET、PO、PVC材料制成,离型层为PET离型膜,减粘层是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,各组分的重量份数如下:丙烯酸酯压敏胶树脂10‑50份、多官能度低聚物或多官能度单体组合物1‑25份、交联剂0.3‑2份、发泡微胶囊0.5‑5份、光引发剂0.5‑4份、溶剂25‑60份。本发明采用的减粘组合物,包括UV减粘成分和加热减粘成分,具有UV减粘和加热减粘的双重减粘效果及方式,可同时采用紫外光照射和加热的方式对减粘膜进行减粘处理,双重处理方式,不仅能够增强胶体的易剥离性,而且能够提高无残胶效果,不会对元器件造成任何损伤。
Description
技术领域
本发明属于减粘膜领域,具体地,涉及一种双重减粘膜。
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,现有技术一般采用減粘型胶带进行处理,固定时胶带保持高粘度,保证元器件固定稳固,切割完成后采用一定的手段降低粘性后去除胶带。
现有技术通常单独采用UV减粘或热减粘技术,仍未做到十分优秀的易剥离性,损坏元器件的情况仍然时有发生。
发明内容
本发明的目的在于提供一种双重减粘膜,采用的减粘组合物,包括UV减粘成分和加热减粘成分,具有UV减粘和加热减粘的双重减粘效果及方式,可同时采用紫外光照射和加热的方式对减粘膜进行减粘处理,双重处理方式,不仅能够增强胶体的易剥离性,而且能够提高无残胶效果,不会对元器件造成任何损伤。
本发明的目的可以通过以下技术方案实现:
一种双重减粘膜,包括依次贴合的基材层、减粘层和离型层;
基材层为PET、PO、PVC材料制成,基材层的厚度为50-150μm;
离型层为PET离型膜,PET离型膜的厚度为38-50μm;
减粘层是由减粘胶组合物涂布于基材层表面制成,减粘层的厚度为5-30μm;
所述减粘胶组合物,包括下述组分,各组分的重量份数如下:丙烯酸酯压敏胶树脂10-50份、多官能度低聚物或多官能度单体组合物1-25份、交联剂0.3-2份、发泡微胶囊0.5-5份、光引发剂0.5-4份、溶剂25-60份;
该双重减粘膜由如下步骤制成:
第一步、将丙烯酸酯压敏胶树脂和交联剂混合后,于300r/min条件下搅拌7-9min,过300目滤布,收集滤液;
第二步、将多官能度低聚物或多官能度单体组合物、发泡微胶囊和光引发剂一同加入至溶剂中,150r/min搅拌10-12min,再加入上述滤液,提高转速至200r/min搅拌18-20min,得到减粘胶组合物;
第三步、将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10-20μm,常温静置24-28h,用封塑机覆上离型膜,再静置5-6h,得到双重减粘膜。
进一步地,所述丙烯酸酯压敏胶树脂为溶剂型丙烯酸酯压敏胶黏剂,其分子量为5万-200万,固含量在25%-60%之间,粘度为300cps-20000cps。
进一步地,所述多官能度低聚物或多官能度单体或其组合物为脂肪族聚氨酯丙烯酸酯低聚物、乙氧化1,6-己二醇二丙烯酸酯、环氧丙烯酸酯低聚物、季戊四醇四丙烯酸酯双季戊四醇五丙烯酸酯、二季戊四醇六丙烯酸酯或三羟甲基丙烷三丙烯酸酯、二季戊四醇六丙烯酸酯、二甲基丙烯酸-1,6-己二醇酯、三羟甲基丙烷三丙烯酸酯、乙氧化三羟甲基丙烷三丙烯酸酯、三羟甲基丙烷三甲基丙烯酸酯、甲基丙烯酸-2-羟基乙酯、丙烯酰胺、二丙烯酸-1,6-己二醇酯、二丙烯酸乙二醇酯、二丙烯酸三甘醇酯、二丙烯酸三丙二醇酯、三羟甲基丙烷三丙烯酸酯、三羟甲基戊烷三甲基丙烯酸酯、三羟甲基丙烷季戊四醇三丙烯酸酯、二丙烯酸对新戊二醇酯、丙氧化新戊二醇二丙烯酸酯、三(2-丙烯酰氧乙基)异氰脲酸酯中的一种或几种。
进一步地,所述交联剂为异氰酸酯类交联剂、胺类交联剂、氮丙啶类交联剂中的一种或几种。
进一步地,所述光引发剂为2-异丙基硫杂蒽酮、1-羟基环己基苯基甲酮、2-羟基-甲基苯基丙、安息香双甲醚、二甲苯酮、2-甲基-1-(4-甲硫基苯基)-2-吗啉基-1-丙酮、2,4,6-(三甲基苯甲酰基)-二苯基氧化膦、烷-1-酮、DR-575中的一种或几种。
进一步地,所述溶剂为丙酮、环己酮、乙酸乙酯、乙酸丁酯、丁酮、甲醇、乙醇、丙醇、异丙醇、异丁醇、正丁醇、甲基异丁酮、异佛尔酮、甲苯、二甲苯、丙二醇甲醚、二丙二醇甲醚中的一种或几种。
进一步地,所述发泡微胶囊直径在10-45微米,所述发泡微胶囊采用如下方法制备:
1)将蒸馏水、纳米二氧化硅、氯化钠和盐酸混合加入反应釜中于300r/min的转速下搅拌5min,得到混合均匀的水相,加入反应釜中;其中,蒸馏水、纳米二氧化硅、氯化钠和盐酸的质量比为10:0.5:1:0.8;
2)将丙烯腈、烯丙基甲基丙烯酸酯、发泡剂、引发剂和交联剂等物质混合并搅拌均匀,得到油相;
3)将油相加入装有水相的反应釜中,通氮气15-30min后密闭反应釜,以300r/min的转速于0.3MPa下将水相和油相均匀混合6min,然后于10000r/min的高速下均化30min;
4)均化结束后将转速下调至100r/min,升温至46℃反应6h,再升温至50℃反应10h,反应完全后,抽滤,然后在50℃条件下真空干燥24h,制得白色粉末状的发泡微胶囊。
本发明的有益效果:
本发明采用的减粘组合物,包括UV减粘成分和加热减粘成分,UV减粘成分为多官能度低聚物或多官能度单体或其组合物和光引发剂,在紫外光(UV)照射下,多官能度低聚物或多官能度单体或其组合物自身会发生交联反应,形成网络结构,与基胶共同构成交联半互穿网络结构,使胶体失粘;
加热减粘成分为发泡微胶囊,发泡微胶囊由热塑性的高分子聚合物外壳包裹低沸点烃类组成,当温度升高时,聚合物外壳软化,在烃类汽化产生的压力作用下发生热膨胀,使微胶囊体积大幅增大十至上百倍,使减粘胶与被粘合物体表面之间产生褶皱、微孔,减小二者的接触面积,从而实现减粘的效果;丙烯腈的均聚物是一种结晶度较高的聚合物,其会提高壳层共聚物的结晶度,从而导致壳层共聚物的玻璃化温度和致密度也随之提高,由于溶剂对聚合物的破坏主要表现为2个过程,一是向聚合物扩散,二是聚合物链的解离使壳层表面结构产生变化,因此,共聚物良好的致密性能够极大减慢溶剂对微胶囊外壳的破坏,从而使制得的微胶囊具备很好的耐溶剂性能;另外,在壳层聚合物中采用烯丙基甲基丙烯酸酯作为辅助单体,在壳层聚合物中引入了较多的C=C,有利于紫外光照射后,与多官能度低聚物或多官能度单体组合物一同发生交联反应,形成更为错乱的网络结构,进而提高UV照射后减粘胶组合物的易剥离性,提高无残胶的效果;
因此,本发明的减粘膜具有UV减粘和加热减粘的双重减粘效果及方式,可同时采用紫外光照射和加热的方式对减粘膜进行减粘处理,双重处理方式,不仅能够增强胶体的易剥离性,而且能够提高无残胶效果,不会对元器件造成任何损伤。
附图说明
为了便于本领域技术人员理解,下面结合附图对本发明作进一步的说明。
图1为本发明一种双重减粘膜的结构示意图。
具体实施方式
下面将结合实施例对本发明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。基于本发明中的实施例,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其它实施例,都属于本发明保护的范围。
一种双重减粘膜,如图1所示,包括依次贴合的基材层1、减粘层2和离型层3;
其中,基材层1为PET、PO、PVC材料制成,基材层1的厚度为50-150μm,优选50-125μm,更优选为100μm;
离型层3为PET离型膜,PET离型膜的厚度优选为38-50μm;
减粘层2是由减粘胶组合物涂布于基材层1表面制成,减粘层2的厚度为5-30μm,优选为10-20μm,更优选为15μm;
减粘胶组合物,包括下述组分,各组分的重量份数如下:丙烯酸酯压敏胶树脂10-50份、多官能度低聚物或多官能度单体组合物1-25份、交联剂0.3-2份、发泡微胶囊0.5-5份、光引发剂0.5-4份、溶剂25-60份;
丙烯酸酯压敏胶树脂为溶剂型丙烯酸酯压敏胶黏剂,其分子量为5万-200万,固含量在25%-60%之间,粘度为300cps-20000cps;
多官能度低聚物或多官能度单体或其组合物为脂肪族聚氨酯丙烯酸酯低聚物、乙氧化1,6-己二醇二丙烯酸酯、环氧丙烯酸酯低聚物、季戊四醇四丙烯酸酯双季戊四醇五丙烯酸酯、二季戊四醇六丙烯酸酯或三羟甲基丙烷三丙烯酸酯、二季戊四醇六丙烯酸酯、二甲基丙烯酸-1,6-己二醇酯、三羟甲基丙烷三丙烯酸酯、乙氧化三羟甲基丙烷三丙烯酸酯、三羟甲基丙烷三甲基丙烯酸酯、甲基丙烯酸-2-羟基乙酯、丙烯酰胺、二丙烯酸-1,6-己二醇酯、二丙烯酸乙二醇酯、二丙烯酸三甘醇酯、二丙烯酸三丙二醇酯、三羟甲基丙烷三丙烯酸酯、三羟甲基戊烷三甲基丙烯酸酯、三羟甲基丙烷季戊四醇三丙烯酸酯、二丙烯酸对新戊二醇酯、丙氧化新戊二醇二丙烯酸酯、三(2-丙烯酰氧乙基)异氰脲酸酯中的一种或几种;多官能度低聚物或多官能度单体或其组合物在紫外光照射下,在光引发剂的作用下,自身发生交联反应,形成网络结构,与基胶共同构成交联半互穿网络结构,使胶体失粘;
交联剂为异氰酸酯类交联剂、胺类交联剂、氮丙啶类交联剂中的一种或几种;
光引发剂为2-异丙基硫杂蒽酮(ITX)、1-羟基环己基苯基甲酮(184)、2-羟基-甲基苯基丙、安息香双甲醚(651)、二甲苯酮(BP)、2-甲基-1-(4-甲硫基苯基)-2-吗啉基-1-丙酮(907)、2,4,6-(三甲基苯甲酰基)-二苯基氧化膦(TPO)、烷-1-酮(1173)、DR-575中的一种或几种;
溶剂为丙酮、环己酮、乙酸乙酯、乙酸丁酯、丁酮、甲醇、乙醇、丙醇、异丙醇、异丁醇、正丁醇、甲基异丁酮、异佛尔酮、甲苯、二甲苯、丙二醇甲醚、二丙二醇甲醚中的一种或几种;
发泡微胶囊是一种核壳结构,外壳为热塑性丙烯酸、丙烯腈类聚合物,内核为烷烃类气体组成的空心球状微颗粒,依靠微球体的膨胀来起到发泡效果;直径在10-45微米,优选直径为10-25微米;发泡微胶囊的发泡温度范围为70-260℃,优选100-150℃;
该发泡微胶囊采用如下方法制备:
1)将蒸馏水、纳米二氧化硅、氯化钠和盐酸混合加入反应釜中于300r/min的转速下搅拌5min,得到混合均匀的水相,加入反应釜中;其中,蒸馏水、纳米二氧化硅、氯化钠和盐酸的质量比为10:0.5:1:0.8;
2)将丙烯腈、烯丙基甲基丙烯酸酯、发泡剂(异丁烷、异戊烷)、引发剂(BPO)和交联剂(二丙烯酸丁二醇酯)等物质混合并搅拌均匀,得到油相;
3)将油相加入装有水相的反应釜中,通氮气15-30min后密闭反应釜,以300r/min的转速于0.3MPa下将水相和油相均匀混合6min,然后于10000r/min的高速下均化30min;
4)均化结束后将转速下调至100r/min,升温至46℃反应6h,再升温至50℃反应10h,反应完全后,抽滤,然后在50℃条件下真空干燥24h,制得白色粉末状的发泡微胶囊;
丙烯腈、烯丙基甲基丙烯酸酯、异丁烷、异戊烷、引发剂、交联剂的用量之比为70:30:20:20:1.5:0.2;
发泡微胶囊由热塑性的高分子聚合物外壳包裹低沸点烃类组成,当温度升高时,聚合物外壳软化,在烃类汽化产生的压力作用下发生热膨胀,使微胶囊体积大幅增大十至上百倍,使减粘胶与被粘合物体表面之间产生褶皱、微孔,减小二者的接触面积,从而实现减粘的效果;丙烯腈的均聚物是一种结晶度较高的聚合物,其会提高壳层共聚物的结晶度,从而导致壳层共聚物的玻璃化温度和致密度也随之提高,由于溶剂对聚合物的破坏主要表现为2个过程,一是向聚合物扩散,二是聚合物链的解离使壳层表面结构产生变化,因此,共聚物良好的致密性能够极大减慢溶剂对微胶囊外壳的破坏,从而使制得的微胶囊具备很好的耐溶剂性能;另外,在壳层聚合物中采用烯丙基甲基丙烯酸酯作为辅助单体,在壳层聚合物中引入了较多的C=C,有利于紫外光照射后,与多官能度低聚物或多官能度单体组合物一同发生交联反应,形成更为错乱的网络结构,进而提高UV照射后减粘胶组合物的易剥离性,提高无残胶的效果;
该双重减粘膜由如下步骤制成:
第一步、将丙烯酸酯压敏胶树脂和交联剂混合后,于300r/min条件下搅拌7-9min,过300目滤布,收集滤液;
第二步、将多官能度低聚物或多官能度单体组合物、发泡微胶囊和光引发剂一同加入至溶剂中,150r/min搅拌10-12min,再加入上述滤液,提高转速至200r/min搅拌18-20min,得到减粘胶组合物;
第三步、将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10-20μm,常温静置24-28h,用封塑机覆上离型膜,再静置5-6h,得到双重减粘膜。
实施例1
一种双重减粘膜,包括依次贴合的基材层、减粘层和离型层;
基材层为PET、PO、PVC材料制成,基材层的厚度为50μm;
离型层为PET离型膜,PET离型膜的厚度为38μm;
减粘层是由减粘胶组合物涂布于基材层表面制成,减粘层的厚度为5μm;
所述减粘胶组合物,包括下述组分,各组分的重量份数如下:丙烯酸酯压敏胶树脂10份、多官能度低聚物或多官能度单体组合物1份、交联剂0.3份、发泡微胶囊0.5份、光引发剂0.5份、溶剂25份;
该双重减粘膜由如下步骤制成:
第一步、将丙烯酸酯压敏胶树脂和交联剂混合后,于300r/min条件下搅拌7min,过300目滤布,收集滤液;
第二步、将多官能度低聚物或多官能度单体组合物、发泡微胶囊和光引发剂一同加入至溶剂中,150r/min搅拌10min,再加入上述滤液,提高转速至200r/min搅拌18min,得到减粘胶组合物;
第三步、将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10μm,常温静置24h,用封塑机覆上离型膜,再静置5h,得到双重减粘膜。
实施例2
一种双重减粘膜,包括依次贴合的基材层、减粘层和离型层;
基材层为PET、PO、PVC材料制成,基材层的厚度为100μm;
离型层为PET离型膜,PET离型膜的厚度为44μm;
减粘层是由减粘胶组合物涂布于基材层表面制成,减粘层的厚度为20μm;
所述减粘胶组合物,包括下述组分,各组分的重量份数如下:丙烯酸酯压敏胶树脂30份、多官能度低聚物或多官能度单体组合物12份、交联剂0.3-2份、发泡微胶囊2.5份、光引发剂3份、溶剂45份;
该双重减粘膜由如下步骤制成:
第一步、将丙烯酸酯压敏胶树脂和交联剂混合后,于300r/min条件下搅拌8min,过300目滤布,收集滤液;
第二步、将多官能度低聚物或多官能度单体组合物、发泡微胶囊和光引发剂一同加入至溶剂中,150r/min搅拌11min,再加入上述滤液,提高转速至200r/min搅拌19min,得到减粘胶组合物;
第三步、将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15μm,常温静置26h,用封塑机覆上离型膜,再静置5.5h,得到双重减粘膜。
实施例3
一种双重减粘膜,包括依次贴合的基材层、减粘层和离型层;
基材层为PET、PO、PVC材料制成,基材层的厚度为150μm;
离型层为PET离型膜,PET离型膜的厚度为50μm;
减粘层是由减粘胶组合物涂布于基材层表面制成,减粘层的厚度为30μm;
所述减粘胶组合物,包括下述组分,各组分的重量份数如下:丙烯酸酯压敏胶树脂50份、多官能度低聚物或多官能度单体组合物25份、交联剂2份、发泡微胶囊5份、光引发剂4份、溶剂60份;
该双重减粘膜由如下步骤制成:
第一步、将丙烯酸酯压敏胶树脂和交联剂混合后,于300r/min条件下搅拌9min,过300目滤布,收集滤液;
第二步、将多官能度低聚物或多官能度单体组合物、发泡微胶囊和光引发剂一同加入至溶剂中,150r/min搅拌12min,再加入上述滤液,提高转速至200r/min搅拌20min,得到减粘胶组合物;
第三步、将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20μm,常温静置28h,用封塑机覆上离型膜,再静置6h,得到双重减粘膜。
对比例1
将实施例1中,减粘胶组合物中的发泡微胶囊换成普通的发泡微胶囊,其余原料及制备不变。
对比例2
将实施例1中,减粘胶组合物中的发泡微胶囊原料去掉,其余原料及制备不变。
对实施例1-3和对比例1-2制得的减粘膜做如下性能测试:
初粘力按照GB/T 4852-847测定;按照GB/T 4851-1998制样标准,在130℃下进行持粘力测试;180°剥离强度按照GB/T 2792-1998标准测试;测试结果如下表所示:
由上表可知,实施例1-3制得的减粘膜的初粘力为10、11号球,持粘力为78-82min·12.5mm-1,180°剥离强度为8.68-8.97N·25mm-1,说明本发明制得减粘膜具有良好的粘性和较高的剥离强度,能够满足使用要求;UV/加热后剥离强度为1.86-2.01N·25mm-1,UV/加热后均无残胶现象,说明本发明制得的减粘膜具有双重减粘效果,并且易于剥离、剥离后无残胶;结合对比例1,说明本发明采用的发泡微胶囊通过单体种类以及用量的控制,使得到的发泡微胶囊具有良好的加热发泡性能,还能促进UV减粘效果;结合对比例2,说明本发明采用的UV减粘和加热减粘两种方式,能够增强胶体的易剥离性,而且能够提高无残胶效果。
以上公开的本发明优选实施例只是用于帮助阐述本发明。优选实施例并没有详尽叙述所有的细节,也不限制该发明仅为所述的具体实施方式。显然,根据本说明书的内容,可作很多的修改和变化。本说明书选取并具体描述这些实施例,是为了更好地解释本发明的原理和实际应用,从而使所属技术领域技术人员能很好地理解和利用本发明。本发明仅受权利要求书及其全部范围和等效物的限制。
Claims (7)
1.一种双重减粘膜,其特征在于,包括依次贴合的基材层(1)、减粘层(2)和离型层(3);
基材层(1)为PET、PO、PVC材料制成,基材层(1)的厚度为50-150μm;
离型层(3)为PET离型膜,PET离型膜的厚度为38-50μm;
减粘层(2)是由减粘胶组合物涂布于基材层(1)表面制成,减粘层(2)的厚度为5-30μm;
所述减粘胶组合物,包括下述组分,各组分的重量份数如下:丙烯酸酯压敏胶树脂10-50份、多官能度低聚物或多官能度单体组合物1-25份、交联剂0.3-2份、发泡微胶囊0.5-5份、光引发剂0.5-4份、溶剂25-60份;
该双重减粘膜由如下步骤制成:
第一步、将丙烯酸酯压敏胶树脂和交联剂混合后,于300r/min条件下搅拌7-9min,过300目滤布,收集滤液;
第二步、将多官能度低聚物或多官能度单体组合物、发泡微胶囊和光引发剂一同加入至溶剂中,150r/min搅拌10-12min,再加入上述滤液,提高转速至200r/min搅拌18-20min,得到减粘胶组合物;
第三步、将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10-20μm,常温静置24-28h,用封塑机覆上离型膜,再静置5-6h,得到双重减粘膜。
2.根据权利要求1所述的一种双重减粘膜,其特征在于,所述丙烯酸酯压敏胶树脂为溶剂型丙烯酸酯压敏胶黏剂,其分子量为5万-200万,固含量在25%-60%之间,粘度为300cps-20000cps。
3.根据权利要求1所述的一种双重减粘膜,其特征在于,所述多官能度低聚物或多官能度单体或其组合物为脂肪族聚氨酯丙烯酸酯低聚物、乙氧化1,6-己二醇二丙烯酸酯、环氧丙烯酸酯低聚物、季戊四醇四丙烯酸酯双季戊四醇五丙烯酸酯、二季戊四醇六丙烯酸酯或三羟甲基丙烷三丙烯酸酯、二季戊四醇六丙烯酸酯、二甲基丙烯酸-1,6-己二醇酯、三羟甲基丙烷三丙烯酸酯、乙氧化三羟甲基丙烷三丙烯酸酯、三羟甲基丙烷三甲基丙烯酸酯、甲基丙烯酸-2-羟基乙酯、丙烯酰胺、二丙烯酸-1,6-己二醇酯、二丙烯酸乙二醇酯、二丙烯酸三甘醇酯、二丙烯酸三丙二醇酯、三羟甲基丙烷三丙烯酸酯、三羟甲基戊烷三甲基丙烯酸酯、三羟甲基丙烷季戊四醇三丙烯酸酯、二丙烯酸对新戊二醇酯、丙氧化新戊二醇二丙烯酸酯、三(2-丙烯酰氧乙基)异氰脲酸酯中的一种或几种。
4.根据权利要求1所述的一种双重减粘膜,其特征在于,所述交联剂为异氰酸酯类交联剂、胺类交联剂、氮丙啶类交联剂中的一种或几种。
5.根据权利要求1所述的一种双重减粘膜,其特征在于,所述光引发剂为2-异丙基硫杂蒽酮、1-羟基环己基苯基甲酮、2-羟基-甲基苯基丙、安息香双甲醚、二甲苯酮、2-甲基-1-(4-甲硫基苯基)-2-吗啉基-1-丙酮、2,4,6-(三甲基苯甲酰基)-二苯基氧化膦、烷-1-酮、DR-575中的一种或几种。
6.根据权利要求1所述的一种双重减粘膜,其特征在于,所述溶剂为丙酮、环己酮、乙酸乙酯、乙酸丁酯、丁酮、甲醇、乙醇、丙醇、异丙醇、异丁醇、正丁醇、甲基异丁酮、异佛尔酮、甲苯、二甲苯、丙二醇甲醚、二丙二醇甲醚中的一种或几种。
7.根据权利要求1所述的一种双重减粘膜,其特征在于,所述发泡微胶囊直径在10-45微米,所述发泡微胶囊采用如下方法制备:
1)将蒸馏水、纳米二氧化硅、氯化钠和盐酸混合加入反应釜中于300r/min的转速下搅拌5min,得到混合均匀的水相,加入反应釜中;其中,蒸馏水、纳米二氧化硅、氯化钠和盐酸的质量比为10:0.5:1:0.8;
2)将丙烯腈、烯丙基甲基丙烯酸酯、发泡剂、引发剂和交联剂等物质混合并搅拌均匀,得到油相;
3)将油相加入装有水相的反应釜中,通氮气15-30min后密闭反应釜,以300r/min的转速于0.3MPa下将水相和油相均匀混合6min,然后于10000r/min的高速下均化30min;
4)均化结束后将转速下调至100r/min,升温至46℃反应6h,再升温至50℃反应10h,反应完全后,抽滤,然后在50℃条件下真空干燥24h,制得白色粉末状的发泡微胶囊。
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