CN105128497A - 一种cem-3型覆铜箔积层板基纸的制造方法 - Google Patents
一种cem-3型覆铜箔积层板基纸的制造方法 Download PDFInfo
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Abstract
本发明提供采用一种CEM-3型覆铜箔积层板基纸的制造方法,包括如下步骤:1)配制浸渍用胶液;2)制造面料;3)制造芯料;4)将所得面料和芯料层叠,并在层叠后的若干基板上表面覆盖铜箔,底面再垫一层离型膜后放在两不锈钢板之间;5)放入层压机中进行加热加压处理,加热温度为170~175℃、压力为1~2MPa,保压10~15min,取出,裁切,检验后,得所述CEM-3型覆铜箔积层板基纸成品。所述方法特制的溴代双酚A型环氧树脂与多种制剂配合形成胶液,并通过对制造工艺、制造条件的优化组合,得到耐高温、高阻燃性能的覆铜箔层压板。
Description
技术领域
本发明涉及一种CEM-3型覆铜箔积层板基纸的制造方法。
背景技术
覆铜箔层压板(CopperCladLaminate,CCL),又称覆铜箔积层板基纸,是将电子玻纤布或其它增强材料浸以树脂,一面或双面覆以铜箔并经热压而制成的一种板状材料,简称为覆铜板。各种不同形式、不同功能的印制电路板,都是在覆铜板上有选择地进行加工、蚀刻、钻孔及镀铜等工序,制成不同的印制电路。对印制电路板主要起互连导通、绝缘和支撑的作用,对电路中信号的传输速度、能量损失和特性阻抗等有很大的影响,因此,印制电路板的性能、品质、制造中的加工性、制造水平、制造成本以及长期的可靠性及稳定性在很大程度上取决于覆铜板。
目前,覆铜箔层压板的制造流程如下:
树脂合成与胶液配制-增强材料浸胶与烘干-浸胶料剪切与检验-浸胶料与铜箔叠层-热压成型-裁剪-检验包装。
其中,胶液由树脂及多种添加剂如固化剂、促进剂、溶剂等组合配制形成,树脂作为胶液中的主要成分,树脂的性能很大程度上决定胶液的性能,胶液作为包覆在增强材料外层的重要材料,在很大程度上决定了覆铜箔层压板的各项性能指标,目前,制造覆铜箔层压板较常用的树脂有酚醛树脂、环氧树脂、不饱和聚酯树脂、铁氟龙树脂、聚酰亚胺树脂、氰酸酯树脂、BT树脂等。
然而,上述这些环氧树脂存在如下缺陷:
(1)不增韧时,固化物一般偏脆,抗剥离、抗开裂、抗冲击性能差。
(2)对极性小的材料(如聚乙烯、聚丙烯、氟塑料等)粘接力小。必须先进行表面活化处理。
(3)有些原材料如活性稀释剂、固化剂等有不同程度的毒性和刺激性。设计配方时应尽量避免选用,施工操作时应加强通风和防护。
对此,目前存在如下解决方案:
中国专利201110435665.1提供了一种覆铜箔积层板基纸用树脂组合物,包括:100质量份的环氧树脂;50~200质量份的高性能树脂;10~50质量份的聚四氟乙烯,所述聚四氟乙烯经过表面处理;20~100质量份的无机填料,所述无机填料经过表面处理;0~50质量份的固化剂。该专利申请采用高性能树脂对环氧树脂进行改性,提高树脂组合物的耐热性能和介电性能;采用经过表面处理的聚四氟乙烯,能够在保证耐高温性能的前提下,提高组合物的介电性能和阻燃性能,并降低组合物的吸湿性能;采用经过表面处理的无机填料,能够降低组合物的热膨胀性,适用于高频、高耐热覆铜箔积层板基纸,可以满足印制电路板加工和装配的要求。其中,所述环氧树脂为双酚A环氧树脂、双酚F环氧树脂、酚醛型环氧树脂和联苯型酚醛树脂中的一种或多种。所述高性能树脂为氰酸酯树脂、改性聚苯醚树脂、苯并噁嗪树脂和双马来酰亚胺树脂中的一种或多种。固化剂为4,4′-二氨基二苯砜、二氨基二苯甲烷、二氨基二苯醚、三嗪改性含氮酚醛树脂和酸酐中一种或多种
然而,其采用的高性能树脂改性的环氧树脂,但由于存在大量苯环,使得覆铜箔积层板基纸耐漏点起痕性能较差。而且,采用如此改性环氧树脂,板材加工时需要较高的固化温度;另外,在常温下也会缓慢反应,从而使得制成粘结片存放期大大缩短,此外,体系也不具备紫外光阻挡的功能。
发明内容
为解决上述存在的问题,本发明的目的在于提供一种CEM-3型覆铜箔积层板基纸的制造方法,采用特制的溴代双酚A型环氧树脂与多种制剂配合形成胶液,并通过对制造工艺、制造条件的优化组合,得到耐高温、高阻燃性能的覆铜箔层压板。
为达到上述目的,本发明的技术方案是:
一种CEM-3型覆铜箔积层板基纸的制造方法,包括如下步骤:
1)配制浸渍用胶液
1.1配制溴代双酚A型环氧树脂
将四溴双酚A及环氧氯丙烷加入到反应釜中,在室温下搅拌25~30min后,加热升温至50~60℃,滴加20%NaOH水溶液,30~60min内滴加完毕,滴加完毕后升温至70~90℃,反应1~2h,加入蒸馏水和甲苯,搅拌至溶解,分液,真空蒸馏得所述溴代双酚A型环氧树脂;
1.2配制胶液
取二甲基甲酰胺和乙二醇二缩水甘油醚混合搅拌得溶剂,向所得溶剂中依次加入固化剂、所述溴代双酚A型环氧树脂、促进剂、硅烷偶联剂、无机填料及活性增韧剂,搅拌,熟化10~15h后,得所述面料浸渍用胶液,胶液内固体含量75~80wt%,送入一胶槽待用;
2)制造面料
取成卷的无碱玻璃纤维布,开卷,以70~80m/min的速度通过容有所述面料浸渍用胶液的胶槽进行浸胶处理,送入烘干室进行烘干,得半固化片,凝胶时长170~210s,烘干温度90~100℃,烘干时间2~5min,裁切后得面料;
3)制造芯料
取成卷的玻纤纸,开卷,以60~70m/min的速度通过容有所述芯料浸渍用胶液的胶槽进行一次浸胶处理,完成后,再以60~70m/min的速度通过容有所述面料浸渍用胶液的胶槽进行二次浸胶处理,完成后送入烘干室进行烘干,得半固化片,凝胶时长170~210s,烘干温度90~100℃,烘干时间2~5min,裁切后得芯料;
4)将所得面料和芯料层叠,并在层叠后的若干基板上表面覆盖铜箔,底面再垫一层离型膜后放在两不锈钢板之间;
5)放入层压机中进行加热加压处理,加热温度为170~175℃、压力为1~2MPa,保压10~15min,取出,裁切,检验后,得所述CEM-3型覆铜箔积层板基纸成品。
其中,所述半固化片的存放条件为:温度25℃以下、相对湿度50%以下。铜箔厚度18μm或35μm。铜箔的表面应光洁,不得有明显的皱折、氧化斑、划痕、麻点、凹坑和玷污。305g/m2及以上铜箔的孔隙率要求在300ram×300mm面积内渗透点不超过8个;在0.5m2面积上铜箔的孔隙总面积不超过直径为0.125mm的圆面积。无碱玻璃纤维布含碱量(以Na20表示)≤0.5%。
进一步,步骤1)中所述四溴双酚A与环氧氯丙烷的质量体积比为1:1.5~3,g/ml;所述四溴双酚A与20%NaOH水溶液的质量体积比为1:1.5~2,g/ml;所述四溴双酚A与甲苯的质量体积比为1:2~3,g/ml;所述四溴双酚A与蒸馏水的质量体积比为1:1~2,g/ml。
另,步骤1)所述胶液中,各组分质量百分比如下:溴代双酚A型环氧树脂:50~60wt%,溶剂:25~35wt%,固化剂:8~11wt%,促进剂:3~5wt%,硅烷偶联剂:2~4wt%,无机填料:1~2wt%,活性增韧剂:1~2wt%。
优选地,步骤1)所述胶液中,各组分质量百分比如下:溴代双酚A型环氧树脂:52wt%,溶剂:28wt%,固化剂:10wt%,促进剂:3wt%,硅烷偶联剂:3wt%,无机填料:2wt%,活性增韧剂:2wt%。
另有,步骤1)所述溶剂中二甲基甲酰胺和乙二醇二缩水甘油醚的体积比为1:1。
再,步骤1)所述固化剂为芳香胺类固化剂或线性酚醛树脂。
其中,所述芳香胺类固化剂为二氨基二苯甲烷(DDM)或二氨基二苯砜(DDS)。
再有,步骤1)所述促进剂为咪唑类促进剂或苄基二甲胺。
且,所述咪唑类促进剂为2-甲基咪唑、2-乙基-4-甲基咪唑或2-苯基咪唑。
另,步骤1)所述活性增韧剂为聚丁二烯或聚氨酯。
再,步骤1)所述无机填料选自氢氧化铝、滑石粉、碳酸钙、硅微粉和高岭土中的一种。
本发明的有益效果在于:
采用溴代双酚A型环氧树脂,增强层压板的胶粘性以及阻燃性;以芳香胺类固化剂或线性酚醛树脂作为固化剂,其中,芳香胺类固化剂的分子结构里都含有稳定的苯环结构,胺基直接与苯环相连,由于苯环的主体障碍作用,与环氧树脂的固化交联反应活性比脂肪胺小;由于苯环的存在,使得层压板具有较高的耐热性和良好的耐水性、电性能以及力学性能;以咪唑类促进剂或苄基二甲胺作为促进剂,可降低本发明环氧树脂组合物的固化温度、促进固化速度,从而减少固化时间、降低能源消耗;以聚丁二烯或聚氨酯为活性增韧剂,可有效提高胶液韧性,提升剥离强度;以硅烷偶联剂对胶液表面进行改性,使其表面呈亲有机性,在环氧树脂中能均匀分散,充分发挥其耐高温性能。
所得CEM-3型覆铜箔积层板基纸具有良好的耐热性能、介电性能、阻燃性能、加工性能、较低的热膨胀性能和较低的吸湿性能,电绝缘性能稳定,平整度好,表面光滑,无凹坑,厚度公差标准,适合应用于高性能电子绝缘要求的产品,如FPC补强板,PCB钻孔垫板,玻纤介子,电位器碳膜印刷玻璃纤维板,精密游星齿轮(晶片研磨),精密测试板材,电气(电器)设备绝缘撑条隔板,绝缘垫板,变压器绝缘板,电机绝缘件,研磨齿轮,电子开关绝缘板等。
具体实施方式
本发明所述的一种CEM-3型覆铜箔积层板基纸的制造方法,包括如下步骤:
1)配制浸渍用胶液
1.1配制溴代双酚A型环氧树脂
将四溴双酚A及环氧氯丙烷加入到反应釜中,在室温下搅拌25~30min后,加热升温至50~60℃,滴加20%NaOH水溶液,30~60min内滴加完毕,滴加完毕后升温至70~90℃,反应1~2h,加入蒸馏水和甲苯,搅拌至溶解,分液,真空蒸馏得所述溴代双酚A型环氧树脂;
1.2配制胶液
取二甲基甲酰胺和乙二醇二缩水甘油醚混合搅拌得溶剂,向所得溶剂中依次加入固化剂、所述溴代双酚A型环氧树脂、促进剂、硅烷偶联剂、无机填料及活性增韧剂,搅拌,熟化10~15h后,得所述面料浸渍用胶液,胶液内固体含量75~80wt%,送入一胶槽待用;
2)制造面料
取成卷的无碱玻璃纤维布,开卷,以70~80m/min的速度通过容有所述面料浸渍用胶液的胶槽进行浸胶处理,送入烘干室进行烘干,得半固化片,凝胶时长170~210s,烘干温度90~100℃,烘干时间2~5min,裁切后得面料;
3)制造芯料
取成卷的玻纤纸,开卷,以60~70m/min的速度通过容有所述芯料浸渍用胶液的胶槽进行一次浸胶处理,完成后,再以60~70m/min的速度通过容有所述面料浸渍用胶液的胶槽进行二次浸胶处理,完成后送入烘干室进行烘干,得半固化片,凝胶时长170~210s,烘干温度90~100℃,烘干时间2~5min,裁切后得芯料;
4)将所得面料和芯料层叠,并在层叠后的若干基板上表面覆盖铜箔,底面再垫一层离型膜后放在两不锈钢板之间;
5)放入层压机中进行加热加压处理,加热温度为170~175℃、压力为1~2MPa,保压10~15min,取出,裁切,检验后,得所述CEM-3型覆铜箔积层板基纸成品。
其中,所述半固化片的存放条件为:温度25℃以下、相对湿度50%以下。铜箔厚度18μm或35μm。铜箔的表面应光洁,不得有明显的皱折、氧化斑、划痕、麻点、凹坑和玷污。305g/m2及以上铜箔的孔隙率要求在300ram×300mm面积内渗透点不超过8个;在0.5m2面积上铜箔的孔隙总面积不超过直径为0.125mm的圆面积。无碱玻璃纤维布含碱量(以Na20表示)≤0.5%。
进一步,步骤1)中所述四溴双酚A与环氧氯丙烷的质量体积比为1:1.5~3,g/ml;所述四溴双酚A与20%NaOH水溶液的质量体积比为1:1.5~2,g/ml;所述四溴双酚A与甲苯的质量体积比为1:2~3,g/ml;所述四溴双酚A与蒸馏水的质量体积比为1:1~2,g/ml。
另,步骤1)所述胶液中,各组分质量百分比如下:溴代双酚A型环氧树脂:50~60wt%,溶剂:25~35wt%,固化剂:8~11wt%,促进剂:3~5wt%,硅烷偶联剂:2~4wt%,无机填料:1~2wt%,活性增韧剂:1~2wt%。
优选地,步骤1)所述胶液中,各组分质量百分比如下:溴代双酚A型环氧树脂:52wt%,溶剂:28wt%,固化剂:10wt%,促进剂:3wt%,硅烷偶联剂:3wt%,无机填料:2wt%,活性增韧剂:2wt%。
另有,步骤1)所述溶剂中二甲基甲酰胺和乙二醇二缩水甘油醚的体积比为1:1。
再,步骤1)所述固化剂为芳香胺类固化剂或线性酚醛树脂。
其中,所述芳香胺类固化剂为二氨基二苯甲烷(DDM)或二氨基二苯砜(DDS)。
再有,步骤1)所述促进剂为咪唑类促进剂或苄基二甲胺。
且,所述咪唑类促进剂为2-甲基咪唑、2-乙基-4-甲基咪唑或2-苯基咪唑。
另,步骤1)所述活性增韧剂为聚丁二烯或聚氨酯。
再,步骤1)所述无机填料选自氢氧化铝、滑石粉、碳酸钙、硅微粉和高岭土中的一种。
本发明中溴代双酚A型环氧树脂的制备实施例如下:
实施例1
将四溴双酚A及环氧氯丙烷加入到反应釜中,在室温下搅拌25min后,加热升温至60℃,滴加20%NaOH水溶液,30min内滴加完毕,滴加完毕后升温至70℃,反应2h,加入蒸馏水和甲苯,搅拌至溶解,分液,真空蒸馏得所述溴代双酚A型环氧树脂;
实施例2
将四溴双酚A及环氧氯丙烷加入到反应釜中,在室温下搅拌30min后,加热升温至50℃,滴加20%NaOH水溶液,60min内滴加完毕,滴加完毕后升温至80℃,反应1.5h,加入蒸馏水和甲苯,搅拌至溶解,分液,真空蒸馏得所述溴代双酚A型环氧树脂;
实施例3
将四溴双酚A及环氧氯丙烷加入到反应釜中,在室温下搅拌28min后,加热升温至60℃,滴加20%NaOH水溶液,50min内滴加完毕,滴加完毕后升温至75℃,反应2h,加入蒸馏水和甲苯,搅拌至溶解,分液,真空蒸馏得所述溴代双酚A型环氧树脂;
实施例4
将四溴双酚A及环氧氯丙烷加入到反应釜中,在室温下搅拌27min后,加热升温至58℃,滴加20%NaOH水溶液,55min内滴加完毕,滴加完毕后升温至85℃,反应1h,加入蒸馏水和甲苯,搅拌至溶解,分液,真空蒸馏得所述溴代双酚A型环氧树脂;
实施例5
将四溴双酚A及环氧氯丙烷加入到反应釜中,在室温下搅拌30min后,加热升温至54℃,滴加20%NaOH水溶液,4min内滴加完毕,滴加完毕后升温至79℃,反应2h,加入蒸馏水和甲苯,搅拌至溶解,分液,真空蒸馏得所述溴代双酚A型环氧树脂;
表1为本发明实施例1~5中溴代双酚A型环氧树脂的制备原料用量列表。
表1
本发明中胶液的制备实施例如下:
实施例6
取二甲基甲酰胺和乙二醇二缩水甘油醚混合搅拌得溶剂,向所得溶剂中依次加入线性酚醛树脂、实施例1所得溴代双酚A型环氧树脂、2-甲基咪唑、硅烷偶联剂及聚丁二烯,搅拌,熟化10h后,得所述胶液,胶液内固体含量75wt%,送入胶槽待用;
实施例7
取二甲基甲酰胺和乙二醇二缩水甘油醚混合搅拌得溶剂,向所得溶剂中依次加入二氨基二苯甲烷、实施例2所得溴代双酚A型环氧树脂、苄基二甲胺、硅烷偶联剂及聚氨酯,搅拌,熟化15h后,得所述胶液,胶液内固体含量80wt%,送入胶槽待用;
实施例8
取二甲基甲酰胺和乙二醇二缩水甘油醚混合搅拌得溶剂,向所得溶剂中依次加入固化剂、实施例3所得溴代双酚A型环氧树脂、2-乙基-4-甲基咪唑、硅烷偶联剂及聚丁二烯,搅拌,熟化15h后,得所述胶液,胶液内固体含量78wt%,送入胶槽待用;
实施例9
取二甲基甲酰胺和乙二醇二缩水甘油醚混合搅拌得溶剂,向所得溶剂中依次加入二氨基二苯砜、实施例4所得溴代双酚A型环氧树脂、2-苯基咪唑、硅烷偶联剂及聚丁二烯,搅拌,熟化14h后,得所述胶液,胶液内固体含量78wt%,送入胶槽待用;
实施例10
取二甲基甲酰胺和乙二醇二缩水甘油醚混合搅拌得溶剂,向所得溶剂中依次加入二氨基二苯砜、实施例5所得溴代双酚A型环氧树脂、促进剂、硅烷偶联剂及活性聚氨酯,搅拌,熟化13h后,得所述胶液,胶液内固体含量77wt%,送入胶槽待用;
表2为本发明实施例6~10中所述胶液中各组分用量列表。
表2.(单位wt%)
溴代双酚A | 溶剂 | 固化剂 | 促进剂 | 硅烷偶联 | 活性增韧 |
型环氧树脂 | 剂 | 剂 | ||||
实施例6 | 52 | 28 | 10 | 3 | 3 | 4 |
实施例7 | 60 | 25 | 8 | 3 | 2 | 2 |
实施例8 | 50 | 32 | 11 | 4 | 1 | 2 |
实施例9 | 51 | 31 | 9 | 5 | 3 | 1 |
实施例10 | 53 | 30 | 10 | 3 | 1 | 3 |
本发明实施例制造所述CEM-3型覆铜箔积层板基纸中的工艺条件如表3所示。其中实施例11~15采用实施例6~10配制所得的胶液。
表3
本发明实施例6~10所配置得面料用胶液的性能参数如表4所示。
表4
本发明实施例11~15制造所得CEM-1型覆铜箔积层板基纸的性能参数如表6所示。
表6
需要说明的是,以上实施例仅用以说明本发明的技术方案而非限制。尽管参照较佳实施例对本发明进行了详细说明,本领域的普通技术人员应当理解,可以对发明的技术方案进行修改或者等同替换,而不脱离本发明技术方案的范围,其均应涵盖在本发明的权利要求范围中。
Claims (10)
1.一种CEM-3型覆铜箔积层板基纸的制造方法,其特征在于,包括如下步骤:
配制浸渍用胶液
配制溴代双酚A型环氧树脂
将四溴双酚A及环氧氯丙烷加入到反应釜中,在室温下搅拌25~30min后,加热升温至50~60℃,滴加20%NaOH水溶液,30~60min内滴加完毕,滴加完毕后升温至70~90℃,反应1~2h,加入蒸馏水和甲苯,搅拌至溶解,分液,真空蒸馏得所述溴代双酚A型环氧树脂;
配制胶液
取二甲基甲酰胺和乙二醇二缩水甘油醚混合搅拌得溶剂,向所得溶剂中依次加入固化剂、所述溴代双酚A型环氧树脂、促进剂、硅烷偶联剂、无机填料及活性增韧剂,搅拌,熟化10~15h后,得所述面料浸渍用胶液,胶液内固体含量75~80wt%,送入一胶槽待用;
制造面料
取成卷的无碱玻璃纤维布,开卷,以70~80m/min的速度通过容有所述面料浸渍用胶液的胶槽进行浸胶处理,送入烘干室进行烘干,得半固化片,凝胶时长170~210s,烘干温度90~100℃,烘干时间2~5min,裁切后得面料;
制造芯料
取成卷的玻纤纸,开卷,以60~70m/min的速度通过容有所述芯料浸渍用胶液的胶槽进行一次浸胶处理,完成后,再以60~70m/min的速度通过容有所述面料浸渍用胶液的胶槽进行二次浸胶处理,完成后送入烘干室进行烘干,得半固化片,凝胶时长170~210s,烘干温度90~100℃,烘干时间2~5min,裁切后得芯料;
将所得面料和芯料层叠,并在层叠后的若干基板上表面覆盖铜箔,底面再垫一层离型膜后放在两不锈钢板之间;
放入层压机中进行加热加压处理,加热温度为170~175℃、压力为1~2MPa,保压10~15min,取出,裁切,检验后,得所述CEM-3型覆铜箔积层板基纸成品。
2.根据权利要求1所述的CEM-3型覆铜箔积层板基纸的制造方法,其特征在于,步骤1)中所述四溴双酚A与环氧氯丙烷的质量体积比为1:1.5~3,g/ml;所述四溴双酚A与20%NaOH水溶液的质量体积比为1:1.5~2,g/ml;所述四溴双酚A与甲苯的质量体积比为1:2~3,g/ml;所述四溴双酚A与蒸馏水的质量体积比为1:1~2,g/ml。
3.根据权利要求1所述的CEM-3型覆铜箔积层板基纸的制造方法,其特征在于,步骤1)所述胶液中,各组分质量百分比如下:溴代双酚A型环氧树脂:50~60wt%,溶剂:25~35wt%,固化剂:8~11wt%,促进剂:3~5wt%,硅烷偶联剂:2~4wt%,无机填料:1~2wt%,活性增韧剂:1~2wt%。
4.根据权利要求1所述的CEM-3型覆铜箔积层板基纸的制造方法,其特征在于,步骤1)所述胶液中,各组分质量百分比如下:溴代双酚A型环氧树脂:52wt%,溶剂:28wt%,固化剂:10wt%,促进剂:3wt%,硅烷偶联剂:3wt%,无机填料:2wt%,活性增韧剂:2wt%。
5.根据权利要求1或3或4所述的CEM-3型覆铜箔积层板基纸的制造方法,其特征在于,步骤1)所述溶剂中二甲基甲酰胺和乙二醇二缩水甘油醚的体积比为1:1。
6.根据权利要求1或3或4所述的CEM-3型覆铜箔积层板基纸的制造方法,其特征在于,步骤1)所述固化剂为芳香胺类固化剂或线性酚醛树脂。
7.根据权利要求1或3或4所述的CEM-3型覆铜箔积层板基纸的制造方法,其特征在于,步骤1)所述促进剂为咪唑类促进剂或苄基二甲胺。
8.根据权利要求7所述的CEM-3型覆铜箔积层板基纸的制造方法,其特征在于,所述咪唑类促进剂为2-甲基咪唑、2-乙基-4-甲基咪唑或2-苯基咪唑。
9.根据权利要求1或3或4所述的CEM-3型覆铜箔积层板基纸的制造方法,其特征在于,步骤1)所述活性增韧剂为聚丁二烯或聚氨酯。
10.根据权利要求1或3或4所述的CEM-3型覆铜箔积层板基纸的制造方法,其特征在于,步骤1)所述无机填料选自氢氧化铝、滑石粉、碳酸钙、硅微粉和高岭土中的一种。
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