CN117428955A - 一种耐热型mlcc离型膜基膜的生产方法 - Google Patents
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Abstract
本发明公开了一种耐热型MLCC离型膜基膜的生产方法,包括外表层、中间芯层和内表层;外表层由PET、玻璃纤维、氯化钠、聚氧化乙烯组成;中间芯层由PET、EPR、EPR‑g‑MAH、PE‑g‑MAH组成;内表层由PET、双酰亚胺酯组成。外表层的氯化钠、聚氧化乙烯起到协同作用,它们与PET、玻璃纤维共混后,可以提高PET的结晶速率,提高热变形温度,使得薄膜外表层耐热性能大幅提高,氯化钠、聚氧化乙烯作为成核剂使得外表层有更好的表面光洁度,可防止玻璃纤维外露;中间芯层通过PET、EPR、EPR‑g‑MAH、PE‑g‑MAH共混改性,可以提高薄膜的冲击强度;内表层由的双酰亚胺酯与PET共混,使得内表层的粘度增加。
Description
技术领域
本发明涉及一种耐热型MLCC离型膜基膜的生产方法。
背景技术
片式多层陶瓷电容器(英文是Multi-layer Ceramic Capacitors,缩写MLCC)是由印好电极(内电极)的陶瓷介质膜片以错位的方式叠合起来,经过一次性高温烧结形成陶瓷芯片,再在芯片的两端封上金属层(外电极),从而形成一个类似独石的结构体,故也叫独石电容器。MLCC制造工艺流程是以聚酯薄膜为基膜,先在基膜表面涂布上有机硅涂层制备成离型膜,之后将液态陶土(即陶瓷浆)均匀涂布于离型膜的有机硅涂层表面,之后在陶土层上印刷电极,然后将印刷了电极的陶土层叠层、压合、烧结定型,经切割等后加工工序,制成片式多层陶瓷电容器。MLCC离型膜通常采用PET聚酯薄膜作为基膜,PET存在着耐热性差的问题,且粘度低,有待进一步地改善。
发明内容
鉴于上述现有技术的缺陷,本发明的目的在于:提供一种耐热型MLCC离型膜基膜的生产方法。
为解决上述问题,一种耐热型MLCC离型膜基膜的生产方法,包括外表层、中间芯层和内表层;
外表层由PET、玻璃纤维、氯化钠、聚氧化乙烯组成;
中间芯层由PET、EPR、EPR-g-MAH、PE-g-MAH组成;
内表层由PET、双酰亚胺酯组成。
生产方法包括以下步骤:
(1)按照外表层、中间芯层和内表层各组分比例分别称取原料;
(2)外表层、中间芯层和内表层原料分别共混,送入各自挤出机进行混炼塑化;
(3)分别将熔融态熔体送入模头,熔体在模头中汇合后通过扁平状的模头口形成熔融态片材;
(4)用气刀将片材贴附于激冷辊上骤冷形成未定型的片材,然后经过水浴冷却后将片材定型形成铸片;
(5)铸片经拉伸后形成薄膜;
(6)薄膜通过红外线检测厚度将对应厚度偏差反馈到模头,通过对应位置螺栓加热功率微动,对薄膜厚度偏差进行修正;
(7)将薄膜进行收卷。
进一步地,外表层、中间芯层和内表层的组分按质量比为:外表层20%、中间芯层60%、内表层20%。
进一步地,外表层的组分按质量比为:PET 67%、玻璃纤维30%、氯化钠2%、聚氧化乙烯1%;
中间芯层的组分按质量比为:PET 58%、EPR 36%、EPR-g-MAH 4%、PE-g-MA H2%;
内表层的组分按质量比为:PET 99.5%、双酰亚胺酯0.5%。
本发明的有益效果是:外表层的氯化钠、聚氧化乙烯起到协同作用,它们与PET、玻璃纤维共混后,可以提高PET的结晶速率,提高热变形温度,使得薄膜外表层耐热性能大幅提高,氯化钠、聚氧化乙烯作为成核剂使得外表层有更好的表面光洁度,可防止玻璃纤维外露;
中间芯层通过PET、EPR、EPR-g-MAH、PE-g-MAH共混改性,可以提高薄膜的冲击强度;
内表层由的双酰亚胺酯与PET共混,使得内表层的粘度增加。
附图说明
图1为本发明的MLCC离型膜基膜的结构示意图。
图中所示:100—外表层,200—中间芯层,300—内表层。
具体实施方式
为比较直观、完整地理解本发明的技术方案,现就结合本发明附图进行非限制性的特征说明如下:
如图1所示,一种耐热型MLCC离型膜基膜的生产方法,包括外表层、中间芯层和内表层;
外表层由PET、玻璃纤维、氯化钠、聚氧化乙烯组成;
中间芯层由PET、EPR、EPR-g-MAH、PE-g-MAH组成;
内表层由PET、双酰亚胺酯组成。
生产方法包括以下步骤:
(1)按照外表层、中间芯层和内表层各组分比例分别称取原料;
(2)外表层、中间芯层和内表层原料分别共混,送入各自挤出机进行混炼塑化;
(3)分别将熔融态熔体送入模头,熔体在模头中汇合后通过扁平状的模头口形成熔融态片材;
(4)用气刀将片材贴附于激冷辊上骤冷形成未定型的片材,然后经过水浴冷却后将片材定型形成铸片;
(5)铸片经拉伸后形成薄膜;
(6)薄膜通过红外线检测厚度将对应厚度偏差反馈到模头,通过对应位置螺栓加热功率微动,对薄膜厚度偏差进行修正;
(7)将薄膜进行收卷。
外表层、中间芯层和内表层的组分按质量比为:外表层20%、中间芯层60%、内表层20%。
外表层的组分按质量比为:PET 67%、玻璃纤维30%、氯化钠2%、聚氧化乙烯1%;
中间芯层的组分按质量比为:PET 58%、EPR 36%、EPR-g-MAH 4%、PE-g-MA H2%;
内表层的组分按质量比为:PET 99.5%、双酰亚胺酯0.5%。
外表层的氯化钠、聚氧化乙烯起到协同作用,它们与PET、玻璃纤维共混后,可以提高PET的结晶速率,提高热变形温度,使得薄膜外表层耐热性能大幅提高,氯化钠、聚氧化乙烯作为成核剂使得外表层有更好的表面光洁度,可防止玻璃纤维外露;
中间芯层通过PET、EPR、EPR-g-MAH、PE-g-MAH共混改性,可以提高薄膜的冲击强度;
内表层由的双酰亚胺酯与PET共混,使得内表层的粘度增加。
Claims (3)
1.一种耐热型MLCC离型膜基膜的生产方法,其特征在于:包括外表层、中间芯层和内表层;
外表层由PET、玻璃纤维、氯化钠、聚氧化乙烯组成;
中间芯层由PET、EPR、EPR-g-MAH、PE-g-MAH组成;
内表层由PET、双酰亚胺酯组成;
生产方法包括以下步骤:
(1)按照外表层、中间芯层和内表层各组分比例分别称取原料;
(2)外表层、中间芯层和内表层原料分别共混,送入各自挤出机进行混炼塑化;
(3)分别将熔融态熔体送入模头,熔体在模头中汇合后通过扁平状的模头口形成熔融态片材;
(4)用气刀将片材贴附于激冷辊上骤冷形成未定型的片材,然后经过水浴冷却后将片材定型形成铸片;
(5)铸片经拉伸后形成薄膜;
(6)薄膜通过红外线检测厚度将对应厚度偏差反馈到模头,通过对应位置螺栓加热功率微动,对薄膜厚度偏差进行修正;
(7)将薄膜进行收卷。
2.根据权利要求1所述的一种耐热型MLCC离型膜基膜的生产方法,其特征在于:外表层、中间芯层和内表层的组分按质量比为:外表层20%、中间芯层60%、内表层20%。
3.根据权利要求1所述的一种耐热型MLCC离型膜基膜的生产方法,其特征在于:外表层的组分按质量比为:PET 67%、玻璃纤维30%、氯化钠2%、聚氧化乙烯1%;
中间芯层的组分按质量比为:PET 58%、EPR 36%、EPR-g-MAH 4%、PE-g-MAH 2%;
内表层的组分按质量比为:PET 99.5%、双酰亚胺酯0.5%。
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