CN110027276A - 一种高cti、无卤cem-1覆铜板的制备方法 - Google Patents
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Abstract
本发明属于覆铜板加工技术领域,尤其涉及一种高CTI、无卤CEM‑1覆铜板的制备方法。本发明通过调整表料树脂磷含量及填料含量,保证CTI达到600V,剥离强度达到1.60N/mm以上;通过使用经过包敷加工的氮磷阻燃剂,保证其分散均匀,提高阻燃效果;里料使用含磷环氧树脂,保证其对木浆纸的浸透性,解决了因浮胶造成的浸胶不匀及粉尘污染问题,大幅提高了里料的阻燃性能,在表料磷含量降低的同时保证了板材的阻燃效果。
Description
技术领域
本发明属于覆铜板加工技术领域,尤其涉及一种高CTI、无卤CEM-1覆铜板的制备方法。
背景技术
随着电子科技的快速发展,人们对于产品安全性的要求日益增强。为了提高印制电路板在潮湿、易污染环境下使用的安全可靠性,迫切需要生产一种高漏电起痕指数(CTI)的覆铜板。但是,随着环保大环境下的外部压力,急切需要开发出一种无卤板材,因此在市场需求下,无卤、高CTI(CEM-1)的覆铜板随即应用生产。
发明内容
本发明针对上述现有技术存在的不足,提供一种高CTI、无卤CEM-1覆铜板的制备方法。
本发明解决上述技术问题的技术方案如下:一种高CTI、无卤CEM-1覆铜板的制备方法,步骤如下:
(1)制备玻纤布粘合剂
按照重量百分比计,玻纤布粘合剂包括:30-50%溶剂型环氧树脂、1-10%双酚A型环氧树脂、1-3%DICY固化剂、0.1-0.3%环氧树脂固化促进剂、15-30%无机填料和余量有机溶剂;
a、取有机溶剂和DICY固化剂加入搅拌釜中,搅拌使其充分溶解,控制反应釜温度为25-40℃,搅拌60-90min;
b、继续向反应釜中加入溶剂型环氧树脂、双酚A型环氧树脂,持续搅拌,通过冷却水循环控制反应釜中温度为25-40℃;
c、继续加入无机填料后,搅拌60-90min;再加入环氧树脂固化剂,开启高效剪切,乳化1-4h,即得玻纤布粘结剂;
(2)制备纸基粘合剂
按照重量百分比计,纸基粘合剂包括:15-25%双酚A型环氧树脂、10-20%含氮酚醛树脂、10-15%植物油改性酚醛树脂、10-15%含磷环氧树脂、0.01-0.05%环氧树脂固化促进剂、10-30%无机填料和余量有机溶剂;
a、向搅拌釜中加入有机溶剂,控制反应釜中温度为25-40℃,并开始搅拌;
b、继续向反应釜中加入双酚A型环氧树脂、含氮酚醛树脂、含磷环氧树脂和植物油改性酚醛树脂,加料过程中持续搅拌,再继续加入无机填料,搅拌60-90min;
c、继续加入经有机溶剂充分溶解的环氧树脂固化促进剂,充分搅拌,即得纸基粘合剂;
(3)制备半固化片
a、木浆纸在卧式上胶机经过一浸和二浸,将纸基粘结剂均匀涂覆在木浆纸表面;玻纤布在立式上胶机经过浸渍,将玻纤布粘结剂均匀涂覆在玻纤布表面;
b、将步骤a涂覆粘结剂后的木浆纸和玻纤布分别经过120-250℃的烘箱,制得纸基半固化片和玻纤布半固化片;
(4)在两张玻纤布半固化片之间加入N张纸基半固化片,再在一面玻纤布表面覆有铜箔,压制,得高CTI、无卤CEM-1覆铜板。
进一步,步骤(1)中,所述的溶剂型环氧树脂为E-20环氧树脂与含磷环氧树脂的混合物,其中含磷环氧树脂的磷含量为2%-2.4%;所述的环氧树脂固化促进剂为2-甲基咪唑、2-乙基-4-甲基咪唑或二甲基苄胺的一种或两种以上混合;所述的无机填料为氢氧化镁或氢氧化铝的一种或两种混合;所述的有机溶剂为二甲基甲酰胺、甲苯、丙酮、丁酮或甲醇的一种或两种以上混合;
步骤(2)中,所述的含氮酚醛树脂的含氮量为15-20%;所述的含磷环氧树脂的含磷量为2.8%-3.2%;所述的环氧树脂固化促进剂为2-甲基咪唑、2-乙基4-甲基咪唑或二甲基苄胺的一种或两种以上混合;所述的无机填料为氢氧化镁、氢氧化铝或含氮含磷阻燃剂的一种或两种以上混合;所述的有机溶剂为二甲基甲酰胺、甲苯、丙酮、丁酮或甲醇的一种或两种以上混合。
进一步,步骤(3)中所述上胶机的车速为8-15m/min。
进一步,步骤(3)中所得纸基半固化片和玻纤布半固化片的物性参数为:凝胶化时间50-100s,树脂流动度5-15%,均匀度<1.5%,挥发物<1%。
进一步,步骤(4)中所述的压制参数为:压制时间120-200min,热盘温度100-200℃,真空度100-200torr,压力60-200MPa。
进一步,步骤(3)中使用的木浆纸规格为120g/㎡、130g/㎡或131g/㎡;使用的玻纤布规格为1080、2116或7628;步骤(4)中使用的铜箔规格为265g/㎡、245g/㎡或215g/㎡。
进一步,N取值为2、4或6。
进一步,步骤(4)所得覆铜板的厚度为0.8-1.6mm,CTI≥600V。
本发明的有益效果是:
本发明通过调整表料树脂磷含量及填料含量,保证CTI达到600V,剥离强度达到1.60N/mm以上;通过使用经过包敷加工的氮磷阻燃剂,保证其分散均匀,提高阻燃效果;里料使用含磷环氧树脂,保证其对木浆纸的浸透性,解决了因浮胶造成的浸胶不匀及粉尘污染问题,大幅提高了里料的阻燃性能,在表料磷含量降低的同时保证了板材的阻燃效果。
具体实施方式
以下结合附图对本发明的原理和特征进行描述,所举实例只用于解释本发明,并非用于限定本发明的范围。
实施例1
一种高CTI、无卤CEM-1覆铜板的制备方法,步骤如下:
(1)制备玻纤布粘合剂
按照重量百分比计,玻纤布粘合剂包括:40%E-20环氧树脂与含磷环氧树脂的混合物(含磷环氧树脂的磷含量为2%)、4%双酚A型环氧树脂、2%DICY固化剂、0.2%环氧树脂固化促进剂、22%无机填料和31.8%二甲基甲酰胺;
a、取有机溶剂二甲基甲酰胺和DICY固化剂加入搅拌釜中,搅拌使其充分溶解,控制反应釜温度为35℃,搅拌70min;
b、继续向反应釜中加入溶剂型环氧树脂、双酚A型环氧树脂,持续搅拌,通过冷却水循环控制反应釜中温度为35℃;
c、继续加入无机填料后,搅拌70min;再加入环氧树脂固化剂,开启高效剪切,乳化3h,即得玻纤布粘结剂;
(2)制备纸基粘合剂
按照重量百分比计,纸基粘合剂包括:19%双酚A型环氧树脂、15%含氮酚醛树脂、13%植物油改性酚醛树脂、12%含磷环氧树脂(含磷量为2.8%)、0.03%环氧树脂固化促进剂、10%无机填料含氮含磷阻燃剂和30.97%二甲基甲酰胺;
a、向搅拌釜中加入有机溶剂二甲基甲酰胺,控制反应釜中温度为28℃,并开始搅拌;
b、继续向反应釜中加入双酚A型环氧树脂、含氮酚醛树脂、含磷环氧树脂和植物油改性酚醛树脂,加料过程中持续搅拌,再继续加入无机填料,搅拌80min;
c、继续加入经有机溶剂充分溶解的环氧树脂固化促进剂,充分搅拌,即得纸基粘合剂;
(3)制备半固化片
a、木浆纸在卧式上胶机经过一浸和二浸,将纸基粘结剂均匀涂覆在木浆纸表面;玻纤布在立式上胶机经过浸渍,将玻纤布粘结剂均匀涂覆在玻纤布表面;
b、将步骤a涂覆粘结剂后的木浆纸和玻纤布分别经过200℃的烘箱,制得纸基半固化片和玻纤布半固化片;
(4)在两张玻纤布半固化片之间加入两张纸基半固化片,再在一面玻纤布表面覆有铜箔,压制,得高CTI、无卤CEM-1覆铜板。
对所得覆铜板的性能进行测试,检测结果见表1。
实施例2
一种高CTI、无卤CEM-1覆铜板的制备方法,步骤如下:
(1)制备玻纤布粘合剂
按照重量百分比计,玻纤布粘合剂包括:35%E-20环氧树脂与含磷环氧树脂的混合物(含磷环氧树脂的磷含量为2.4%)、6%双酚A型环氧树脂、1.5%DICY固化剂、0.3%环氧树脂固化促进剂、18%无机填料和39.2%丙酮;
a、取有机溶剂丙酮和DICY固化剂加入搅拌釜中,搅拌使其充分溶解,控制反应釜温度为28℃,搅拌85min;
b、继续向反应釜中加入溶剂型环氧树脂、双酚A型环氧树脂,持续搅拌,通过冷却水循环控制反应釜中温度为28℃;
c、继续加入无机填料后,搅拌85min;再加入环氧树脂固化剂,开启高效剪切,乳化2h,即得玻纤布粘结剂;
(2)制备纸基粘合剂
按照重量百分比计,纸基粘合剂包括:16%双酚A型环氧树脂、12含氮酚醛树脂、11%植物油改性酚醛树脂、13%含磷环氧树脂(含磷量为3.2%)、0.04%环氧树脂固化促进剂、15%无机填料含氮含磷阻燃剂和32.96%二甲基甲酰胺;
a、向搅拌釜中加入有机溶剂二甲基甲酰胺,控制反应釜中温度为34℃,并开始搅拌;
b、继续向反应釜中加入双酚A型环氧树脂、含氮酚醛树脂、含磷环氧树脂和植物油改性酚醛树脂,加料过程中持续搅拌,再继续加入无机填料,搅拌70min;
c、继续加入经有机溶剂充分溶解的环氧树脂固化促进剂,充分搅拌,即得纸基粘合剂;
(3)制备半固化片
a、木浆纸在卧式上胶机经过一浸和二浸,将纸基粘结剂均匀涂覆在木浆纸表面;玻纤布在立式上胶机经过浸渍,将玻纤布粘结剂均匀涂覆在玻纤布表面;
b、将步骤a涂覆粘结剂后的木浆纸和玻纤布分别经过160℃的烘箱,制得纸基半固化片和玻纤布半固化片;
(4)在两张玻纤布半固化片之间加入四张纸基半固化片,再在一面玻纤布表面覆有铜箔,压制,得高CTI、无卤CEM-1覆铜板。
对所得覆铜板的性能进行测试,检测结果见表1。
表1
CTI值 | 剥离强度(1OZ) | |
实施例1 | 600V | 1.73N/mm |
实施例2 | 600V | 1.67N/mm |
由表1可以看出,采用本发明方法制得的覆铜板,CTI达到600V,且具有很高的剥离强度。
以上所述仅为本发明的较佳实施例,并不用以限制本发明,凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。
Claims (5)
1.一种高CTI、无卤CEM-1覆铜板的制备方法,其特征在于,步骤如下:
(1)制备玻纤布粘合剂
按照重量百分比计,玻纤布粘合剂包括:30-50%溶剂型环氧树脂、1-10%双酚A型环氧树脂、1-3%DICY固化剂、0.1-0.3%环氧树脂固化促进剂、15-30%无机填料和余量有机溶剂;
a、取有机溶剂和DICY固化剂加入搅拌釜中,搅拌使其充分溶解,控制反应釜温度为25-40℃,搅拌60-90min;
b、继续向反应釜中加入溶剂型环氧树脂、双酚A型环氧树脂,持续搅拌,通过冷却水循环控制反应釜中温度为25-40℃;
c、继续加入无机填料后,搅拌60-90min;再加入环氧树脂固化剂,开启高效剪切,乳化1-4h,即得玻纤布粘结剂;
(2)制备纸基粘合剂
按照重量百分比计,纸基粘合剂包括:15-25%双酚A型环氧树脂、10-20%含氮酚醛树脂、10-15%植物油改性酚醛树脂、10-15%含磷环氧树脂、0.01-0.05%环氧树脂固化促进剂、10-30%无机填料和余量有机溶剂;
a、向搅拌釜中加入有机溶剂,控制反应釜中温度为25-40℃,并开始搅拌;
b、继续向反应釜中加入双酚A型环氧树脂、含氮酚醛树脂、含磷环氧树脂和植物油改性酚醛树脂,加料过程中持续搅拌,再继续加入无机填料,搅拌60-90min;
c、继续加入经有机溶剂充分溶解的环氧树脂固化促进剂,充分搅拌,即得纸基粘合剂;
(3)制备半固化片
a、纸基在卧式上胶机经过一浸和二浸,将纸基粘结剂均匀涂覆在纸基表面;玻纤布在立式上胶机经过浸渍,将玻纤布粘结剂均匀涂覆在玻纤布表面;
b、将步骤a涂覆粘结剂后的纸基和玻纤布分别经过120-250℃的烘箱,制得纸基半固化片和玻纤布半固化片;
(4)在两张玻纤布半固化片之间加入N张纸基半固化片,再在一面玻纤布表面覆有铜箔,压制,得高CTI、无卤CEM-1覆铜板。
2.根据权利要求1所述的制备方法,其特征在于,步骤(1)中,所述的溶剂型环氧树脂为E-20环氧树脂与含磷环氧树脂的混合物,其中含磷环氧树脂的磷含量为2%-2.4%;所述的环氧树脂固化促进剂为2-甲基咪唑、2-乙基4-甲基咪唑或二甲基苄胺的一种或两种以上混合;所述的无机填料为氢氧化镁或氢氧化铝的一种或两种混合;所述的有机溶剂为二甲基甲酰胺、甲苯、丙酮、丁酮或甲醇的一种或两种以上混合;
步骤(2)中,所述的含氮酚醛树脂的含氮量为15-20%;所述的含磷环氧树脂的含磷量为2.8%-3.2%;所述的环氧树脂固化促进剂为2-甲基咪唑、2-乙基4-甲基咪唑或二甲基苄胺的一种或两种以上混合;所述的无机填料为氢氧化镁、氢氧化铝或含氮含磷阻燃剂的一种或两种以上混合;所述的有机溶剂为二甲基甲酰胺、甲苯、丙酮、丁酮或甲醇的一种或两种以上混合。
3.根据权利要求1所述的制备方法,其特征在于,步骤(3)中所述上胶机的车速为8-15m/min。
4.根据权利要求1所述的制备方法,其特征在于,步骤(3)中所得纸基半固化片和玻纤布半固化片的物性参数为:凝胶化时间50-100s,树脂流动度5-15%,均匀度<1.5%,挥发物<1%。
5.根据权利要求1所述的制备方法,其特征在于,步骤(4)中所述的压制参数为:压制时间120-200min,热盘温度100-200℃,真空度100-200torr,压力60-200MPa。
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