CN108608710A - 一种用于轨道交通隔音隔热的超声融合薄膜及其制备方法 - Google Patents
一种用于轨道交通隔音隔热的超声融合薄膜及其制备方法 Download PDFInfo
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Abstract
本发明公开了一种用于轨道交通隔音隔热的超声融合薄膜及其制备方法,包括以下原料:复合薄膜基材层、阻燃超声融合胶层和增强纤维网层,所述阻燃超声融合胶由以下质量百分比的原料组成:70%‑90%的改性三聚氰胺甲醛树脂和10‑30%复配无卤含磷阻燃剂,所述复配无卤含磷阻燃剂为聚磷酸酯阻燃剂、醇酚类聚磷酸酯阻燃剂、双螺环型聚磷酸酯阻燃剂中的一种。制备方法包括:(1)超声压合;(2)胶合;(3)阻燃超声融合胶的制备。
Description
技术领域
本发明涉及隔音隔热材料技术领域,尤其涉及一种用于轨道交通隔音隔热的超声融合薄膜及其制备方法。
背景技术
轨道交通装备通常在较高的速度、空气流动性较差的隧道等条件下运行,其车厢内会产生较大的噪音,会给乘客带来不适;同时,轨道交通装备经常在高温、高湿、寒冷等极端外界环境下,其车厢内需要空调来维持恒温恒湿的状态,消耗较大的能源;还有,轨道交通装备一直在密闭的环境下运行,其安全性尤其是防火安全容易受人为因素影响。为解决上述问题,在轨道交通装备的车厢地板、顶部及侧墙内壁贴装隔音隔热密封袋,它是由两层超声融合薄膜之间填充玻璃纤维毡后再进行超声热合制备而成的。
现有技术中的超声融合薄膜的制备方法如下:在聚酯薄膜的一面涂布超声融合胶后,在超声融合胶上覆盖增强纤维网,然后进行烘干固化。这种超声融合胶存在以下缺陷:(1)韧性差,导致超声融合薄膜折叠的时候容易出现折痕并掉粉;(2)热稳定性能差,导致超声融合薄膜在放置一段时间后会出现无法超声热合的情形;(3)在超声融合胶制备过程中,存在大量游离甲醛,导致隔音隔热密封袋甲醛超标,不符合轨道交通装备材料的要求。
发明内容
发明目的:本发明所要解决的现有用于隔音隔热的材料韧性差,热稳定性差,材料存在甲醛超标和受用寿命短的技术问题,本发明提供一种用于轨道交通隔音隔热的超声融合薄膜及其制备方法。
技术方案:一种用于轨道交通隔音隔热的超声融合薄膜,其特征在于,包括:复合薄膜基材层、阻燃超声融合胶层和增强纤维网层。
所述阻燃超声融合胶由以下质量百分比的原料组成:70%-90%的改性三聚氰胺甲醛树脂和10-30%复配无卤含磷阻燃剂。
所述改性三聚氰胺甲醛树脂由以下质量百分比的原料组成:三聚氰胺15-30%、甲醛40-75%、增韧剂0.1-3%、热稳定改性剂2-10%、游离甲醛捕获剂2-10%和多聚甲醛2-10%。
优选的,所述热稳定性改性剂为尿素、取代脲、聚氨酯、双氰胺、胍、磺酰胺中的一种。
优选的,所述增韧剂为聚二乙醇、聚乙烯醇中的一种。
所述复配无卤含磷阻燃剂为聚磷酸酯阻燃剂、醇酚类聚磷酸酯阻燃剂、双螺环型聚磷酸酯阻燃剂中的一种。
本发明还提供一种用于轨道交通隔音隔热的超声融合薄膜的制备方法,包括以下步骤:
(1)阻燃超声融合胶的制备:将三聚氰胺15-30%、甲醛40-75%、增韧剂0.1-3%、改性剂2-10%、多聚甲醛2-10%投入混合料槽中,开动变速搅拌机,在100~200r/min的转速条件下连续搅拌2~3小时;在搅拌中,液体温度升高到60~70℃;然后加入5-10%无卤含磷阻燃剂,并再搅拌10分钟,停止搅拌,经过过滤处理,即得所述阻燃超声融合胶;
(2)胶合:所述复合薄膜基材在胶粘剂涂布装置内被涂覆一层阻燃超声融合胶,涂布速度为20~27米/分钟,然后自然垂挂的增强纤维网在重力作用下覆盖在所述阻燃超声融合胶的表面后进入烘箱,覆盖有所述阻燃超声融合胶和增强纤维网的复合薄膜基材依次通过温度按照梯度分布的各段烘箱进行固化,温度分布为95℃-100℃-105℃-110℃-110℃-100℃-80℃,当通过烘箱后,所述阻燃超声融合胶固定在所述复合薄膜基材上,所述增强纤维网固定在所述阻燃超声融合胶上,得到超声融合薄膜;
(3)超声压合:将两张步骤(2)所得的超声融合薄膜用超声融合机在160~180℃、45~58Kpa压力、进料速度为16~20cm/min的条件下进行压合,即得到隔音隔热复合材料。
本发明的技术方案具有如下优点;
(1)本发明在三聚氰胺甲醛树脂合成过程中添加尿素或取代脲、聚氨酯、双氰胺、胍、磺酰胺等改性剂,能够有效降低树脂中的游离甲醛,使得超声融合薄膜符合轨道交通装备的绿色环保要求;
(2)本发明在三聚氰胺甲醛树脂合成过程中添加聚乙二醇作为增韧剂,可以很明显地改善三聚氰胺甲醛树脂的脆性, 其剪切冲击强度比没添加增韧剂的提高2倍以上,便于超声融合薄膜进行超声压合加工,延长超声融合薄膜的寿命;
(3)本发明在三聚氰胺甲醛树脂合成过程中添加多聚甲醛,能够有效改善三聚氰胺甲醛树脂的热稳定性,使得超声融合薄膜能够应用在轨道交通装备所运行的高温高湿环境中;
(4)三聚氰胺甲醛树脂本身具备阻燃性能,超声融合胶的制备过程中添加无卤含磷阻燃剂,能够大大提高超声融合胶的阻燃等级。
具体实施方式
以下通过具体实施例对本发明做进一步阐述,应当指出:对于本工艺领域的普通工艺人员来说,在不脱离本发明原理的前提下,对本发明的各种等价形式的修改均落于本申请所附权利要求所限定的范围。
实施例1
一种用于轨道交通隔音隔热的超声融合薄膜,包括:复合薄膜基材层、阻燃超声融合胶层和增强纤维网层。
所述阻燃超声融合胶由以下质量百分比的原料组成:70%-90%的改性三聚氰胺甲醛树脂和10-30%复配无卤含磷阻燃剂。
所述改性三聚氰胺甲醛树脂由以下质量百分比的原料组成:三聚氰胺15-30%、甲醛40-75%、增韧剂0.1-3%、热稳定改性剂2-10%、游离甲醛捕获剂2-10%和多聚甲醛2-10%。
进一步,所述热稳定性改性剂为尿素、取代脲、聚氨酯、双氰胺、胍、磺酰胺中的一种。
进一步,所述增韧剂为聚二乙醇、聚乙烯醇中的一种。
所述复配无卤含磷阻燃剂为聚磷酸酯阻燃剂、醇酚类聚磷酸酯阻燃剂、双螺环型聚磷酸酯阻燃剂中的一种。
本实施例还提供一种用于轨道交通隔音隔热的超声融合薄膜的制备方法,包括以下步骤:
(1)阻燃超声融合胶的制备:将三聚氰胺15-30%、甲醛40-75%、增韧剂0.1-3%、改性剂2-10%、多聚甲醛2-10%投入混合料槽中,开动变速搅拌机,在100~200r/min的转速条件下连续搅拌2~3小时;在搅拌中,液体温度升高到60~70℃;然后加入5-10%无卤含磷阻燃剂,并再搅拌10分钟,停止搅拌,经过过滤处理,即得所述阻燃超声融合胶;
(2)胶合:所述复合薄膜基材在胶粘剂涂布装置内被涂覆一层阻燃超声融合胶,涂布速度为20~27米/分钟,然后自然垂挂的增强纤维网在重力作用下覆盖在所述阻燃超声融合胶的表面后进入烘箱,覆盖有所述阻燃超声融合胶和增强纤维网的复合薄膜基材依次通过温度按照梯度分布的各段烘箱进行固化,温度分布为95℃-100℃-105℃-110℃-110℃-100℃-80℃,当通过烘箱后,所述阻燃超声融合胶固定在所述复合薄膜基材上,所述增强纤维网固定在所述阻燃超声融合胶上,得到超声融合薄膜;
(3)超声压合:将两张步骤(2)所得的超声融合薄膜用超声融合机在160~180℃、45~58Kpa压力、进料速度为16~20cm/min的条件下进行压合,即得到隔音隔热复合材料。
本发明一种用于轨道交通隔音隔热的超声融合薄膜,应用于轨道交通装配车厢内,隔音隔热效果好,材料韧性好,热稳定性好,安全环保,受用寿命长。
Claims (7)
1.一种用于轨道交通隔音隔热的超声融合薄膜,其特征在于,包括:复合薄膜基材层、阻燃超声融合胶层和增强纤维网层。
2.根据权利要求1所述一种用于轨道交通隔音隔热的超声融合薄膜,其特征在于,所述阻燃超声融合胶由以下质量百分比的原料组成:70%-90%的改性三聚氰胺甲醛树脂和10-30%复配无卤含磷阻燃剂。
3.根据权利要求2所述一种用于轨道交通隔音隔热的超声融合薄膜,其特征在于,所述改性三聚氰胺甲醛树脂由以下质量百分比的原料组成:三聚氰胺15-30%、甲醛40-75%、增韧剂0.1-3%、热稳定改性剂2-10%、游离甲醛捕获剂2-10%和多聚甲醛2-10%。
4.根据权利要求3所述一种用于轨道交通隔音隔热的超声融合薄膜,其特征在于,所述热稳定性改性剂为尿素、取代脲、聚氨酯、双氰胺、胍、磺酰胺中的一种。
5.根据权利要求3所述一种用于轨道交通隔音隔热的超声融合薄膜,其特征在于,所述增韧剂为聚二乙醇、聚乙烯醇中的一种。
6.根据权利要求2所述一种用于轨道交通隔音隔热的超声融合薄膜,其特征在于,所述复配无卤含磷阻燃剂为聚磷酸酯阻燃剂、醇酚类聚磷酸酯阻燃剂、双螺环型聚磷酸酯阻燃剂中的一种。
7.根据权利要求1-6任意一项所述的一种用于轨道交通隔音隔热的超声融合薄膜的制备方法,其特征在于,包括以下步骤:
(1)阻燃超声融合胶的制备:将三聚氰胺15-30%、甲醛40-75%、增韧剂0.1-3%、改性剂2-10%、多聚甲醛2-10%投入混合料槽中,开动变速搅拌机,在100~200r/min的转速条件下连续搅拌2~3小时;在搅拌中,液体温度升高到60~70℃;然后加入5-10%无卤含磷阻燃剂,并再搅拌10分钟,停止搅拌,经过过滤处理,即得所述阻燃超声融合胶;
(2)胶合:所述复合薄膜基材在胶粘剂涂布装置内被涂覆一层阻燃超声融合胶,涂布速度为20~27米/分钟,然后自然垂挂的增强纤维网在重力作用下覆盖在所述阻燃超声融合胶的表面后进入烘箱,覆盖有所述阻燃超声融合胶和增强纤维网的复合薄膜基材依次通过温度按照梯度分布的各段烘箱进行固化,温度分布为95℃-100℃-105℃-110℃-110℃-100℃-80℃,当通过烘箱后,所述阻燃超声融合胶固定在所述复合薄膜基材上,所述增强纤维网固定在所述阻燃超声融合胶上,得到超声融合薄膜;
(3)超声压合:将两张步骤(2)所得的超声融合薄膜用超声融合机在160~180℃、45~58Kpa压力、进料速度为16~20cm/min的条件下进行压合,即得到隔音隔热复合材料。
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WO2023221355A1 (zh) * | 2022-05-17 | 2023-11-23 | 浙江福莱新材料股份有限公司 | 用于大飞机的绝缘薄膜 |
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