CN106987211A - 一种粘接Dome片结构骨架的胶膜及制备方法 - Google Patents

一种粘接Dome片结构骨架的胶膜及制备方法 Download PDF

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CN106987211A
CN106987211A CN201710195475.4A CN201710195475A CN106987211A CN 106987211 A CN106987211 A CN 106987211A CN 201710195475 A CN201710195475 A CN 201710195475A CN 106987211 A CN106987211 A CN 106987211A
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王学刚
蔡秀娟
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Changzhou Chi Photoelectric Technology Co Ltd
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Abstract

本发明涉及一种粘接Dome片结构骨架的胶膜及制备方法,包含以下成分:结构粘接树脂:46~60重量份;可成膜橡胶:12~40重量份;固化剂:4.6~9重量份;抗老剂:1.5~3.0重量份;稳定剂:1.0~2.5重量份;消泡剂:0.2~0.6重量份。本发明通过优选结构粘接树脂和与和优选固化剂,可有效解决胶膜固化后高硬度,高刚性和高耐温性问题,优选成膜橡胶和抗老剂、稳定剂和消泡剂使胶膜具有良好的稳定性和成膜性能,易于通过热压工艺实现Dome片对胶膜的超薄厚度要求。

Description

一种粘接Dome片结构骨架的胶膜及制备方法
技术领域
本发明属于振膜Dome片结构粘接材料技术领域,特别涉及一种可加热固化的热熔胶膜。
技术背景
热熔胶膜分为一般的热塑性与热固性胶膜两大类,是一种需要加热实现的粘接的胶带,由于不含溶剂,无污染,生产工艺相对简单,是胶带产品中的一个重要组成。
该类胶膜相对传统热塑性胶膜有如下特点:1)固化之后硬度高,邵氏D达到85HD;2)固化后的耐温性可长期180℃,短期250℃;3)固化后,与铝箔、泡棉类材料有良好的粘接力,且耐弯折、耐老化;4)固化后胶膜的比模量(E/ρ:弹性模量与材料密度的比值)高;以上的性能可以满足在音圈设计中对Dome片要求。
传统胶膜一般是热塑性的,如EVA胶膜、PVB胶膜、亚克力胶膜等,配方包括树脂、抗老剂、稳定剂、润滑剂和消泡剂等,其中树脂包括:EVA、PVB、聚烯烃等分子量大的聚合物;抗老剂主要可增加胶膜在生产或者使用过程中抗老化能力;稳定剂、润滑剂和消泡剂主要在胶膜生产中减少胶体的不稳定而出现的气泡、物料堆积和粘度不稳定等问题。
由于传统胶膜配方的所限,故很难实现长期耐温超过140℃温度,硬度也难以达到较高水平,其高的比模量就能更难实现。
专利CN20141772580.6公开了一种耐高温热固化胶膜的制作方法,但该胶膜厚度为40-60um,难于满足振膜Dome片的粘接要求,且该专利胶膜采用溶液涂膜方式,工艺复杂且不环保。
专利CN201510333468.7公开的耐高温热固化胶膜加入耐温填料,成膜稳定性较差,且不具备固化后高硬度,高刚性的性能,因此亦不满足振膜Dome片结构粘的要求。
发明内容
本发明的目的在于提供一种可实现粘接Dome片结构骨架的胶膜材料,通过热熔胶膜配方进行设计、使其具有快速热固化、且固化后耐高温、硬度好,比模量高等性能,实现音圈设计对Dome片的高硬度、高刚性、高耐温,高比模量、高稳定性等性能要求。
本发明的技术方案为:
一种粘接Dome片结构骨架的胶膜,包含以下成分:结构粘接树脂:46~60重量份;可成膜橡胶:12~40重量份;固化剂:4.6~9重量份;抗老剂:1.5~3.0重量份;稳定剂:1.0~2.5重量份;消泡剂:0.2~0.6重量份。
优选的是:结构粘接树脂为线性酚醛树脂、环氧改性酚醛树脂、钡酚醛树脂及有机硅改性酚醛树脂的至少一种。
优选的是:可成膜橡胶为丁苯橡胶,丁腈橡胶,天然橡胶的至少一种。
优选的是:固化剂为芳香族、指环族和脂肪族类固化剂,可以为乙烯基三胺DETA、氨乙基哌嗪AE、间苯二胺m-PDA、MPD、二氨基二苯基甲烷DDM、HT-972、DEH-50、亚甲基双环己烷胺、亚甲基双苯二胺中的一种或几种。
优选的是:抗老剂124、RD、MB、DNP、NBC中的一种或多种。
优选的是:稳定剂为对苯二酚、对甲氧基苯酚、对苯醌、单官能团丙烯酸脂单体,双官能团丙烯酸脂单体。
优选的是:消泡剂为乳化硅油、高碳醇脂肪酸酯复合物、聚氧乙烯聚氧丙烯季戊四醇醚、聚氧乙烯聚氧丙醇胺醚、聚氧丙烯甘油醚和聚氧丙烯聚氧乙烯甘油醚、聚二甲基硅氧烷中的一种或多种。
本发明还提供制备上述胶膜的方法,包括以下步骤:
1)先将可成膜橡胶在开炼机中开炼,并加入抗老剂,开炼至门尼粘度60~80;
2)将结构粘接树脂边开炼,边把开炼的可成膜橡胶加入其中,在树脂总量加入1/3-2/3之后,将稳定剂和消泡剂加入,并将剩余的树脂一并加入其中,继续开炼至门尼粘度70左右;
3)在开炼可成膜橡胶与树脂的门尼粘度达到要求后,将固化剂全部加入并继续开炼,直至门尼粘度到80~85;
4)将开炼后的可成膜橡胶进行切片,并采用热压机进行热压成型即为胶膜。
优选的是:胶膜厚度5um~20um。
本发明的主要优点在于:
通过优选结构粘接树脂和与和优选固化剂,可有效解决胶膜固化后高硬度,高刚性和高耐温性问题,优选成膜橡胶和抗老剂、稳定剂和消泡剂使胶膜具有良好的稳定性和成膜性能,易于通过热压工艺实现Dome片对胶膜的超薄厚度要求。
采用热压机进行热压成型,控制胶膜厚度为5-20um,从而达到Dome片粘接性能要求。热压成型工艺简单,操作方便,生产成本低,更具竞争优势。
通过上述优选原料及工艺,所制成胶膜厚度5-20um,可以在160℃~180℃,3-30S内固化,具有很高的粘接强度;固化后的对铝箔、泡棉的粘接强度高,剥离强度>1.5KN/m(对铝箔、泡棉材料本体无破坏);胶膜单独固化后硬度高,可达邵氏D85HD以上;粘接铝箔和泡棉试件180℃,168小时无变化;固化后胶膜的比模量(E/ρ:弹性模量与材料密度的比值)高,达到2.67*105
具体实施方式
实施例1:
先将丁腈橡胶3.5Kg在开炼机中开炼,并加入抗老剂0.15Kg六次甲基四胺,开炼至门尼粘度到60~80;将环氧改性酚醛5.5Kg树脂边开炼,橡胶边加入其中,在环氧改性酚醛总量加入一半之后,将0.15Kg对甲氧基苯酚和0.05Kg乳化硅油加入,并将剩余的环氧改性酚醛一并加入其中,继续开炼门尼粘度至70左右;在开炼橡胶与环氧改性酚醛的门尼粘度达到要求后,将0.8Kg六次甲基四胺全部加入并继续开炼,直至门尼粘度到80~85;将开炼后的橡胶进行切片,并采用热压机进行热压成型,并控制厚度5-10um;即为胶膜。
把胶膜放到铝箔和铝箔之间,在170℃、3MPa压力条件下热压5s,得到测试样品,剥离强度:1.55kN/m;固化后邵氏硬度:85HD;将上述固化后的测试样品放置180℃老化箱内168小时,样件性能不变。
实施例2:
先将丁苯橡胶3.0Kg在开炼机中开炼,并加入0.15Kg六次甲基四胺,开炼至门尼粘度到60~80;将钡酚醛树脂2.5Kg及有机硅改性酚醛树脂3.5Kg,树脂边开炼橡胶边加入其中,在树脂总量加入一半之后,将0.15Kg对甲氧基苯酚和0.05Kg乳化硅油加入,并将剩余的树脂一并加入其中,继续开炼门尼粘度至70左右;在开炼橡胶与树脂的门尼粘度达到要求后,将0.8Kg六次甲基四胺全部加入并继续开炼,直至门尼粘度到80~85;将开炼后的橡胶进行切片,并采用热压机进行热压成型,并控制厚度10~20um;即为胶膜。
把胶膜放到铝箔和铝箔之间,在170℃、3MPa压力条件下热压5s,得到测试样品,剥离强度:1.56kN/m;固化后邵氏硬度:86HD;将上述固化后的测试样品放置180℃老化箱内168小时,样件性能不变。

Claims (9)

1.一种粘接Dome片结构骨架的胶膜,其特征在于:包含以下成分:
结构粘接树脂:46~60重量份;可成膜橡胶:12~40重量份;固化剂:4.6~9重量份;抗老剂:1.5~3.0重量份;稳定剂:1.0~2.5重量份;消泡剂:0.2~0.6重量份。
2.如权利要求1所述的一种粘接Dome片结构骨架的胶膜,其特征在于:结构粘接树脂为线性酚醛树脂、环氧改性酚醛树脂、钡酚醛树脂及有机硅改性酚醛树脂的至少一种。
3.如权利要求1所述的一种粘接Dome片结构骨架的胶膜,其特征在于:可成膜橡胶为丁苯橡胶,丁腈橡胶,天然橡胶的至少一种。
4.如权利要求1所述的一种粘接Dome片结构骨架的胶膜,其特征在于:固化剂为芳香族、指环族和脂肪族类固化剂,可以为乙烯基三胺DETA、氨乙基哌嗪AE、间苯二胺m-PDA、MPD、二氨基二苯基甲烷DDM、HT-972、DEH-50、亚甲基双环己烷胺、亚甲基双苯二胺中的一种或几种。
5.如权利要求1所述的一种粘接Dome片结构骨架的胶膜,其特征在于:抗老剂124、RD、MB、DNP、NBC中的一种或多种。
6.如权利要求1所述的一种粘接Dome片结构骨架的胶膜,其特征在于:稳定剂为对苯二酚、对甲氧基苯酚、对苯醌、单官能团丙烯酸脂单体,双官能团丙烯酸脂单体。
7.如权利要求1所述的一种粘接Dome片结构骨架的胶膜,其特征在于:消泡剂为乳化硅油、高碳醇脂肪酸酯复合物、聚氧乙烯聚氧丙烯季戊四醇醚、聚氧乙烯聚氧丙醇胺醚、聚氧丙烯甘油醚、聚氧丙烯聚氧乙烯甘油醚和聚二甲基硅氧烷中的一种或多种。
8.制备如权利要求1-7任一所述胶膜的方法,其特征在于,包括以下步骤:
1)先将可成膜橡胶在开炼机中开炼,并加入抗老剂,开炼至门尼粘度60~80;
2)将结构粘接树脂边开炼,边把开炼的可成膜橡胶加入其中,在树脂总量加入1/3-2/3之后,将稳定剂和消泡剂加入,并将剩余的树脂一并加入其中,继续开炼至门尼粘度70左右;
3)在开炼可成膜橡胶与树脂的门尼粘度达到要求后,将固化剂全部加入并继续开炼,直至门尼粘度到80~85;
4)将开炼后的可成膜橡胶进行切片,并采用热压机进行热压成型即为胶膜。
9.如权利要求8所述的方法,其特征在于:胶膜厚度5um~20um。
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Cited By (2)

* Cited by examiner, † Cited by third party
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