CN105885719A - 一种tpu防爆膜及其制备工艺 - Google Patents
一种tpu防爆膜及其制备工艺 Download PDFInfo
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Abstract
本发明公开了一种TPU防爆膜,包括TPU基材,于该TPU基材之上从上到下依次设置有保护层、保护层胶水、防刮层、光学基材层、覆合胶层,于该TPU基材之下从上到下依次设置有压敏胶层、贴合层;其中,所述保护层、贴合层的厚度分别为25‑75μm;以及该TPU防爆膜的制备工艺。本发明具有较高硬度且兼具柔韧性,对冲击力具有较高的缓冲性,可以起到明显的防爆效果。
Description
技术领域
本发明涉及光学保护膜技术领域,特别是一种TPU防爆膜及其制备工艺。
背景技术
目前市场上的防刮花保护膜产品只能起到防止硬物划伤的功能,如果手机等产品从手中滑落,或者有重物落在屏幕上,无法有效的保护屏幕;还有通过增加基材厚度实现保护效果,但是由于保护膜基材以PET为主,厚度超过100μm会特别硬,不利于后期加工,同时客户使用时的手感也不佳,易划伤皮肤。
当手机或其他电子产品屏幕面从1米以上的高度跌落时,地面的硬物都会对屏幕产生破坏,屏幕或产生印痕,裂纹,甚至破洞破洞,需要进行换屏或者产品无法使用;其他的保护膜通过增加PET的厚度来提高保护效果,但由于PET材质超过100μm就是特别坚硬,不易于后期的模切加工,客户在使用时也容易划伤皮肤,影响使用。
发明内容
本发明要解决的技术问题是针对上述现有技术的不足,提供一种TPU防爆膜及其制备工艺。
为解决上述技术问题,本发明所采取的技术方案是:一种TPU防爆膜,包括TPU基材,于该TPU基材之上从上到下依次设置有保护层、保护层胶水、防刮层、光学基材层、覆合胶层,于该TPU基材之下从上到下依次设置有压敏胶层、贴合层;其中,所述保护层、贴合层的厚度分别为25-75μm。
上述技术方案中,所述防刮层的厚度为2-5μm。
上述技术方案中,所述保护层胶水的厚度为5-10μm。
上述技术方案中,所述TPU基材的厚度为100-200μm。
上述技术方案中,所述光学基材层的厚度为75-188μm。
上述技术方案中,所述压敏胶层的厚度为20-40μm。
一种TPU防爆膜的制备工艺,包括以下步骤:a、将防刮层涂布在光学基材层的上侧,然后进入第一烤箱,第一烤箱从进口到出口温度逐渐提高,形成半成品A;b、将压敏胶层涂布在TPU基材的下侧,然后进入第二烤箱,第二烤箱从进口到出口温度逐渐提高,TPU基材从第二烤箱出来之后与贴合层经压辊贴合,形成半成品B;c、将覆合胶层涂布在半成品A的下侧,然后进入第三烤箱,第三烤箱从进口到出口温度逐渐提高,半成品A从第三烤箱出来后经压辊贴合于半成品B的上侧,形成半成品C;d、将保护层胶水涂布于保护层的下侧,然后进入第四烤箱,第四烤箱从进口到出口温度逐渐提高,保护层从第四烤箱出来后经压辊贴合于半成品C的上侧,形成成品。
上述技术方案中,所述防刮层的配方包括亚克力/聚氨酯胶、光引发剂、乙酸乙酯、乙酸丁酯,其重量份数比为50:3:20:28。
上述技术方案中,所述压敏胶层、保护层胶水为硅胶;其中,压敏胶层的配方为甲基硅橡胶、二甲基硅橡胶、铂金催化剂、甲苯,其重量份数比为:10:30:2:48;保护层胶水的配方为甲基硅橡胶、二甲基硅氧烷、铂金催化剂、甲苯,其重量份数比为5:45:2:58。
上述技术方案中,所述覆合胶层的配方为亚克力胶原液、异氰酸固化剂、乙酸乙酯、甲苯,其重量份数比为50:2:30:18。
本发明的有益效果是:由于采用多层结构结合的方式,可以减少作为保护作用的保护层与贴合层的厚度可以控制在100μm以内,便于后期加工和使用。具有较高硬度且兼具柔韧性,对冲击力具有较高的缓冲性,可以起到明显的防爆效果。通过GB/T13520标准测试,采用TPU防爆膜的产品,能够经受1.5米高度,200g的钢球冲击,玻璃没有损伤;而目前普通的保护膜产品,只能通过0.2米高度,10g钢球的冲击。
附图说明
图1是本发明的整体结构示意图。
图中,1、TPU基材;2;保护层;3、保护层胶水;4、防刮层;5、光学基材层;6、覆合胶层;7、压敏胶层;8、贴合层;A、半成品A;B、半成品B;C、半成品C。
具体实施方式
下面结合附图对本发明作进一步详细的说明。
如图1所示,一种TPU防爆膜,包括TPU基材1,于该TPU基材1之上从上到下依次设置有保护层2、保护层胶水3、防刮层4、光学基材层5、覆合胶层6,于该TPU基材1之下从上到下依次设置有压敏胶层7、贴合层8。
其中,所述保护层2、贴合层8的厚度分别为25-75μm。保护层2和贴合层8都为PET透明膜。本发明所用保护层2和贴合层8的厚度25-75μm,有利于成品的后续加工和客户手感;PET基材保证产品的加工性能。
其中,所述防刮层4为具有防刮功能的涂层,如聚氨酯或亚克力,其厚度为2-5μm。本发明所用防刮层4涂料为聚氨酯材质,可以保证产品具有良好的防刮性能,耐候性优良;厚度2-5μm可以保证足够的硬度。
其中,所述保护层胶水3为硅胶,其厚度为5-10μm。本发明所用保护层胶水3厚度5-10μm的硅胶,有利于产品后期加工和剥离。
其中,所述TPU基材1为聚氨酯材料,其厚度为100-200μm。本发明所用TPU为主基材,因为TPU具有良好的加工性和柔韧性,可以有效防冲击;厚度100-200μm有利于确保抗冲击性和光学透明性。
其中,所述光学基材层5为PET基材,其厚度为75-188μm。本发明所用光学基材层5(PET基材)为贴合TPU用,因为PET具有良好的光学透明性和硬度;厚度75-188μm有利于确保产品的硬度满足要求。
其中,所述压敏胶层7为硅胶胶水,其厚度为20-40μm。本发明TPU基材1涂布的压敏胶层7为硅胶,涂布厚度为20-40μm,因为硅胶具有良好的排气性和贴合性能,20μm以上的厚度有利于贴合时减少气泡。
本发明所用设备为韩国SKC株式会社生产,具有较高的精密度,可以确保涂布的厚度均匀性和外观的良好。
一种TPU防爆膜的制备工艺,包括以下步骤:
a、光学基材层5,采用PET基材,要求厚度为75-188μm,透光率大于90%;光学基材层5从涂布机上的放卷设备上以20m/min的速度被放出,经过微凹涂布头时,微凹涂布辊将防刮层4涂布在光学基材层5的上侧,然后进入40m长的第一烤箱,第一烤箱一共分为5节,每一节从进口到出口温度逐渐提高,其具体温度依次为30℃、60℃、80℃、100℃、120℃,然后出烤箱进入收卷机,形成半成品A。
b、TPU基材1从涂布机上的放卷设备上以20m/min的速度被放出,经过微凹涂布头时,微凹涂布辊将压敏胶层7涂布在TPU基材1的下侧,然后进入40m长的第二烤箱,第二烤箱一共分为5节,每一节从进口到出口温度逐渐提高,其具体温度依次为30℃、60℃、80℃、150℃、160℃;同时,贴合层8从放卷设备上以20m/min的速度被放出,在贴合机位置上,贴合层8与从烤箱出来的TPU基材1相遇,TPU基材1与贴合层8经贴合机的压辊贴合,形成半成品B,并在收卷设备上收在一起。
c、半成品A从涂布机上的放卷设备上以20m/min的速度被放出,经过挤出式涂布头时,挤出式涂布辊将覆合胶层6涂布在半成品A的下侧,然后进入40m长的第三烤箱,第三烤箱一共分为5节,每一节从进口到出口温度逐渐提高,其具体温度依次为30℃、80℃、80℃、140℃、160℃;同时,半成品B从放卷设备上以20m/min的速度被放出,在贴合机位置上,半成品B与从烤箱出来的半成品A相遇,半成品A经贴合机压辊贴合于半成品B的上侧,形成半成品C,并在收卷设备上收在一起。
d、保护层2从涂布机上的放卷设备上以20m/min的速度被放出,经过挤出式涂布头时,挤出式涂布辊将保护层胶水3涂布于保护层2的下侧,然后进入40m长的第四烤箱,第四烤箱一共分为5节,每一节从进口到出口温度逐渐提高,其具体温度依次为30℃、60℃、80℃、100℃、120℃;同时,半成品C从放卷设备上以20m/min的速度被放出,在贴合机位置上,半成品C与从烤箱出来的保护层2相遇,保护层2经贴合机压辊贴合于半成品C的上侧,形成成品。
其中,所述防刮层4的配方包括亚克力/聚氨酯胶、光引发剂、乙酸乙酯、乙酸丁酯,其重量份数比为50:3:20:28,其固含量为10-30%。
其中,所述压敏胶层7、保护层胶水3为硅胶;其中,压敏胶层7的配方为甲基硅橡胶、二甲基硅橡胶、铂金催化剂、甲苯,其重量份数比为:10:30:2:48,其固含量为20-40%;保护层胶水3的配方为甲基硅橡胶、二甲基硅氧烷、铂金催化剂、甲苯,其重量份数比为5:45:2:58。
其中,所述覆合胶层6的配方为亚克力胶原液、异氰酸固化剂、乙酸乙酯、甲苯,其重量份数比为50:2:30:18。
以上的实施例只是在于说明而不是限制本发明,故凡依本发明专利申请范围所述的方法所做的等效变化或修饰,均包括于本发明专利申请范围内。
Claims (10)
1.一种TPU防爆膜,其特征在于:包括TPU基材,于该TPU基材之上从上到下依次设置有保护层、保护层胶水、防刮层、光学基材层、覆合胶层,于该TPU基材之下从上到下依次设置有压敏胶层、贴合层;其中,所述保护层、贴合层的厚度分别为25-75μm。
2.根据权利要求1所述的一种TPU防爆膜,其特征在于:所述防刮层的厚度为2-5μm。
3.根据权利要求1所述的一种TPU防爆膜,其特征在于:所述保护层胶水的厚度为5-10μm。
4.根据权利要求1所述的一种TPU防爆膜,其特征在于:所述TPU基材的厚度为100-200μm。
5.根据权利要求1所述的一种TPU防爆膜,其特征在于:所述光学基材层的厚度为75-188μm。
6.根据权利要求1所述的一种TPU防爆膜,其特征在于:所述压敏胶层的厚度为20-40μm。
7.根据权利要求1-6任一所述的一种TPU防爆膜的制备工艺,其特征在于,包括以下步骤:a、将防刮层涂布在光学基材层的上侧,然后进入第一烤箱,第一烤箱从进口到出口温度逐渐提高,形成半成品A;b、将压敏胶层涂布在TPU基材的下侧,然后进入第二烤箱,第二烤箱从进口到出口温度逐渐提高,TPU基材从第二烤箱出来之后与贴合层经压辊贴合,形成半成品B;c、将覆合胶层涂布在半成品A的下侧,然后进入第三烤箱,第三烤箱从进口到出口温度逐渐提高,半成品A从第三烤箱出来后经压辊贴合于半成品B的上侧,形成半成品C;d、将保护层胶水涂布于保护层的下侧,然后进入第四烤箱,第四烤箱从进口到出口温度逐渐提高,保护层从第四烤箱出来后经压辊贴合于半成品C的上侧,形成成品。
8.根据权利要求7所述的一种TPU防爆膜的制备工艺,其特征在于:所述防刮层的配方包括亚克力/聚氨酯胶、光引发剂、乙酸乙酯、乙酸丁酯,其重量份数比为50:3:20:28。
9.根据权利要求7所述的一种TPU防爆膜的制备工艺,其特征在于:所述压敏胶层、保护层胶水为硅胶;其中,压敏胶层的配方为甲基硅橡胶、二甲基硅橡胶、铂金催化剂、甲苯,其重量份数比为:10:30:2:48;保护层胶水的配方为甲基硅橡胶、二甲基硅氧烷、铂金催化剂、甲苯,其重量份数比为5:45:2:58。
10.根据权利要求7所述的一种TPU防爆膜的制备工艺,其特征在于:所述覆合胶层的配方为亚克力胶原液、异氰酸固化剂、乙酸乙酯、甲苯,其重量份数比为50:2:30:18。
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