CN113444275A - 一种smc预浸布及其制备方法 - Google Patents
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- C08J5/24—Impregnating materials with prepolymers which can be polymerised in situ, e.g. manufacture of prepregs
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Abstract
本发明公开了一种SMC预浸布，原料按质量百分比包括：纤维织物40‑70%，糊料30‑60%；其中糊料由树脂料、固化剂、填料及辅料混合得到。纤维织物为采用无碱玻璃纤维、高强玻璃纤维、碳纤维、芳纶纤维、超高分子量聚乙烯纤维、玄武岩纤维中任一种纯编纤维织物或两种以上混编纤维织物。纤维织物采用无碱玻璃纤维、高强玻璃纤维、碳纤维、芳纶纤维、超高分子量聚乙烯纤维、玄武岩纤维中任一种纯编得到，或，采用无碱玻璃纤维、高强玻璃纤维、碳纤维、芳纶纤维、超高分子量聚乙烯纤维、玄武岩纤维中两种以上混编得到。本发明还公开了上述SMC预浸布的制备方法。本发明所得SMC预浸布可广泛运用在汽车、电子电器等诸多领域。
Description
技术领域
本发明涉及预浸料制备技术领域，尤其涉及一种SMC预浸布及其制备方法。
背景技术
SMC是Sheet Molding Compound的缩写，现在多为纤维增强型不饱和聚酯树脂材料。SMC复合材料及其SMC模压制品，具有优异的电绝缘性能、机械性能、热稳定性、耐化学防腐性。所以SMC制品的应用范围相当广泛，主要有以下应用领域：电气工业的应用、汽车工业中的应用、铁路车辆中的应用、通讯工程中的应用、防爆电器设备外壳的应用等等。
与通常采用环氧树脂为基体的预浸料相比，SMC产品成型周期快、成本低；但是SMC产品相较于通常采用环氧树脂作为树脂基体的预浸料制品而言，其力学性能等相差较多。因此如果将SMC材料的力学性能改进将极大的扩大SMC产品的应用范围。
纤维增强树脂基复合材料的力学性能主要与其增强纤维的种类和长径比相关，而通常的SMC片材的纤维为切断玻纤，所以其性能较差；本发明所提供的预浸布采用连续织物布作为增强材料，可以极大提升其力学性能。
发明内容
本发明的目的是为了解决现有技术中存在的缺点，而提出的一种SMC预浸布及其制备方法。本发明创造性地将连续纤维织物布作为SMC中的增强材料，同时提高了纤维织物在制品中的质量占比，使此SMC预浸布兼具了SMC和预浸料的优点，能够制备出具有良好性能的制品。
一种SMC预浸布，其原料按质量百分比包括：纤维织物40-70%，糊料30-60%；其中糊料由树脂料、固化剂、填料及辅料混合得到。
优选地，纤维织物采用无碱玻璃纤维、高强玻璃纤维、碳纤维、芳纶纤维、超高分子量聚乙烯纤维、玄武岩纤维中任一种纯编得到，或，采用无碱玻璃纤维、高强玻璃纤维、碳纤维、芳纶纤维、超高分子量聚乙烯纤维、玄武岩纤维中两种以上混编得到。
优选地，纤维织物形式包括：平纹布、斜纹布、单向布、连续毡、短切毡。
优选地，纤维织物的面密度为50-2000g/m2。
优选地，树脂料和固化剂的质量比为100：0.1-4。
优选地，固化剂为分解温度为100-200℃的过氧化物引发剂，优选为过氧化苯甲酰叔丁酯。
优选地，填料在糊料中所占质量百分比为0-40%，填料为滑石粉、碳酸钙、硫酸钡、氧化铝、氢氧化铝中至少一种。
优选地，辅料包含增稠剂、阻聚剂、低收缩添加剂、内脱模剂、着色剂中至少一种。
优选地，增稠剂在糊料中所占质量百分比为1-5%，增稠剂为氧化镁、氢氧化镁、氧化钙、氢氧化钙中至少一种。
优选地，阻聚剂在糊料中所占质量百分比为0.1-1%，阻聚剂为对苯二酚。
优选地，低收缩添加剂在糊料中所占质量百分比为0-5%，低收缩添加剂为热塑性聚乙烯、热塑性聚苯乙烯、热塑性聚氯乙烯中至少一种。
优选地，内脱模剂在糊料中所占质量百分比为0.1-2%，内脱模剂为硬脂酸锌和/或硬脂酸钙。
优选地，着色剂在糊料中所占质量百分比为0-2%。
优选地，糊料由树脂料、固化剂、填料及辅料25-70℃混合均匀得到。
上述SMC预浸布的制备方法，将糊料均匀涂抹于纤维织物表面。
本发明所提供的一种SMC预浸布的制备方法，该方法提供了一种性能（尤其是力学性能）优越、成本低廉的预浸料中间体的制备方法，可以广泛运用在汽车、电子电器等诸多领域。
具体实施方式
下面结合具体实施例对本发明作进一步解说。
实施例1
将400g不饱和树脂、8g氧化苯甲酰叔丁酯、40g氢氧化铝、16g氧化镁、2g对苯二酚、5g聚乙烯粉末、2g硬脂酸锌，30℃搅拌均匀得到糊料。
将上述糊料均匀涂抹至面密度为400g/m2的无碱玻璃纤维方格布表面，使糊料占总质量40%。
将上述预浸料140℃模压固化2min成型成为平板。
按国家标准GB/T2570-1995测得制品的拉伸强度和拉伸模量分别为：200MPa、35GPa。
实施例2
将500g乙烯基树脂、10g氧化苯甲酰叔丁酯、30g滑石粉、16g氧化钙、2g对苯二酚、10g聚乙烯粉末、2g硬脂酸锌，30℃搅拌均匀得到糊料。
将上述混合液体均匀涂抹至面密度为200g/m2的T700碳纤维单向布表面，使糊料占总质量35%。
将上述预浸料在160℃模压固化4min成型成为平板。
按国家标准GB/T2570-1995测得制品的拉伸强度和拉伸模量分别为：700MPa、90GPa。
以上所述，仅为本发明较佳的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，根据本发明的技术方案及其发明构思加以等同替换或改变，都应涵盖在本发明的保护范围之内。
Claims (10)
1.一种SMC预浸布，其特征在于，其原料按质量百分比包括：纤维织物40-70%，糊料30-60%；其中糊料由树脂料、固化剂、填料及辅料混合得到。
2.根据权利要求1所述SMC预浸布，其特征在于，纤维织物采用无碱玻璃纤维、高强玻璃纤维、碳纤维、芳纶纤维、超高分子量聚乙烯纤维、玄武岩纤维中任一种纯编得到，或，采用无碱玻璃纤维、高强玻璃纤维、碳纤维、芳纶纤维、超高分子量聚乙烯纤维、玄武岩纤维中两种以上混编得到。
3.根据权利要求1所述SMC预浸布，其特征在于，纤维织物形式包括：平纹布、斜纹布、单向布、连续毡、短切毡。
4.根据权利要求1所述SMC预浸布，其特征在于，纤维织物的面密度为50-2000g/m2。
5.根据权利要求1所述SMC预浸布，其特征在于，树脂料和固化剂的质量比为100：0.1-4。
6.根据权利要求1所述SMC预浸布，其特征在于，固化剂为分解温度为100-200℃的过氧化物引发剂，优选为过氧化苯甲酰叔丁酯。
7.根据权利要求1所述SMC预浸布，其特征在于，填料在糊料中所占质量百分比为0-40%，填料为滑石粉、碳酸钙、硫酸钡、氧化铝、氢氧化铝中至少一种。
8.根据权利要求1所述SMC预浸布，其特征在于，辅料包含增稠剂、阻聚剂、低收缩添加剂、内脱模剂、着色剂中至少一种；
其中增稠剂在糊料中所占质量百分比为1-5%，增稠剂为氧化镁、氢氧化镁、氧化钙、氢氧化钙中至少一种；
阻聚剂在糊料中所占质量百分比为0.1-1%，阻聚剂为对苯二酚；
低收缩添加剂在糊料中所占质量百分比为0-5%，低收缩添加剂为热塑性聚乙烯、热塑性聚苯乙烯、热塑性聚氯乙烯中至少一种；
内脱模剂在糊料中所占质量百分比为0.1-2%，内脱模剂为硬脂酸锌和/或硬脂酸钙；
着色剂在糊料中所占质量百分比为0-2%。
9.根据权利要求1所述SMC预浸布，其特征在于，糊料由树脂料、固化剂、填料及辅料25-70℃混合均匀得到。
10.一种如权利要求1-9任一项所述SMC预浸布的制备方法，其特征在于，将糊料均匀涂抹于纤维织物表面。
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