自粘性漆包线漆发展概况

漆包线漆的发展非常迅速,而由于环境污染问题的限制,具有自粘性的漆包线漆也随之开发成功。但是目前的自粘性漆包线漆的耐热等级比较低,品种也比较少。电子行业的发展要求开发出具有更高耐热等级的自粘性漆包线漆,芳脂族聚酰胺树脂由于其优异的物理性能和高耐热性,使其可以作为H级自粘性漆包线漆使用。     

THEIC改性F级聚酯亚胺漆包线漆

自七十年代以来,国外普遍应用的耐热漆包线漆是THEIC改性聚酯亚胺漆包线漆。在这种漆的分子结构中引入了热稳定的含三嗪环的三(2-羟乙基)异氰尿酸酯(THEIC)来部分或完全取代丙三醇。此漆涂制的漆包线,具有较高的耐热性和热冲击性,耐热等级155℃(F级)以上,软化击穿温度高,与浸渍漆相容性良好,机械强度和耐冷冻剂等性能亦较好。本文主要研究根据F级聚酯亚胺漆包线的性能要求在聚酯亚胺分子结构中引入含三嗪环的THEIC。     

电绝缘涂料

200901067 电子品用耐热电绝缘涂料组合物;200901068 可直焊聚酯亚胺漆包线漆及其制备方法;200901069 耐高温环保型漆包线热熔自粘漆的制备方法;200901070 一种耐高温绝缘漆及耐高温无磁性漆包线及其制备方法。     

聚酯—聚氨酯漆包线漆

单一涂层聚酯—聚氨酯漆包线具有自粘性和易焊性,同时也具有一般电磁线的电气性能、机械性能和耐化学性能,在我国现有的漆包设备上可一次涂成。用这种漆涂装的漆包线所绕制的线圈,通过短时间烘焙即可成型,不再另加浸渍。接头焊接时,可不必除去漆皮而直接搪锡。这样,就可改善劳动环境,降低成本,缩短工序,减少工时。该漆涂装的漆包线,可广泛用于微型电机,电器、仪表及通讯器材等,具有良好的经济效果。     

聚苯基喹(口恶)啉的全合成及其热性能

聚苯基喹(口恶)啉(pheny lated polyquinoxali)是芳杂环聚合物中具有特殊性能的品种之一。其特点之一是杰出的耐热性,它甚至比公认的聚酰亚胺的耐热性还要好;其特点之二是可溶于普通的有机溶剂氯仿中,这个特性在耐热性聚合物中是少见的。基于上述二点可将它用于耐热等级高的电器绝缘材料。例如,有关单位用于制造漆包线,该漆包线可用于生产深水电机。当前,由于其生产成本较高,尚不能在民用产品中推广,但可应用在国防工业或高技术领域。由于其性能优异,许多人仍在从事研究,其目的在于改进合成方法与降低成本,预计此项研究将会出现新的成果。     

电绝缘涂料

一种利用回收资源制造的高性能环保型绝缘涂料组合物；漆包线环保型热熔自粘漆制备方法[第一段]     

新型F级聚氨酯漆包线漆的合成及性能研究

聚氨酯漆包线漆具有绝缘性和直焊性优良、热稳定性及染色性能好等特点，广泛用于焊点较多的彩电、仪表、计算机等行业。利用聚氨酯预聚体中的异氰酸酯基自身的三聚反应来提高漆膜耐热等级，对这种聚氨酯漆的合成和性能作了较系统的研究，得到了一种新型Ｆ级聚氨酯漆包线漆。     

三(2一羟乙基)异三聚氰酸酯中试鉴定会

三(2—羟乙基)异三聚氰酸酯(简称 THEIC)10吨/年中试鉴定会于一九八三年十一月一日至三日在合肥召开。会议由安徽省石化厅主持。参加会议的有上海开林造漆厂、上海电磁线厂、湖南衡阳绝缘材料厂、哈尔滨绝缘材料厂、天津绝缘材料厂、西安绝缘材料厂、合肥工业大学、省化工设计院及省内有关单位共二十三个单位四十二名代表。三(2—羟乙基)异三聚氰酸酯是含有芳杂环结构的多元醇,可以作为制备多种有机化学品和合成树脂的原料或改性剂,特别是作为耐热性绝缘材料的原料,国内要求甚为迫切。THEIC 改性聚酯漆包线漆使原来的聚酯漆的绝缘等级由 B 级提高到 F 级,用它改性聚酯亚胺漆包线漆使聚酯亚胺漆包线漆的耐热性和耐溶剂性提高。一年来,提供中     

新型杂萘联苯聚醚砜酮及其应用

介绍瓣型杂萘联苯聚醚砜酮的制备，性能和应用，研究表明该树脂各项性能优异，是一种优良的绝缘材料，将其作用漆包线漆，操作工艺性好，且属于Ｈ级漆包线漆。     

一种漆包线脱漆剂的研究

漆包线需要对引出端焊接时,要将其表面的漆去除,且不能影响基材的性能。通过实验对比了打磨法、商品级脱漆剂及自制碱性脱漆剂对漆包线脱漆效果和对基材的影响。研究表明,打磨法和商品级脱漆剂法均对基材有损伤,自制脱漆剂的脱漆速度快,能在很短的时间内脱除漆包线上的聚酯漆和聚酰亚胺漆,而且对基材没有损伤。明确了自制脱漆剂的清洗工艺,经过酸中和和水洗后减小了基材在存放中被氧化腐蚀的危险。经过拉力试验比较,证明自制的碱性脱漆剂对镍基和铜基漆包线基材影响最小。     

含氟聚酰胺酰亚胺自粘电磁线漆的合成与性能研究

合成了一种新型含氟二胺单体2-三氟甲基-4,4'-二氨基二苯醚(3FODA),该单体具有较高的反应活性和溶解性。使用3FODA替代4,4'-二胺基二苯醚(ODA),与偏苯三酸酐(TMA)、二甲苯甲烷二异氰酸酯(MDI)通过两步法合成了含氟聚酰胺酰亚胺自粘电磁线漆。试验证明,含氟基团三氟甲基的引入明显提高了漆膜的柔韧性和附着力。     

用二苯基丙烷结构提高聚酯电磁线漆耐热性能的研究

研究了在改性聚酯树脂中引入二苯基丙烷结构来提高其耐热性能,制成的耐热聚酯电磁线漆作底漆与聚酰胺酰亚胺电磁线漆配合使用,涂制的QZY／XY-200级复合漆包线热软化温度可以达到380℃,热冲击性能在漆包线拉伸10％、240℃、30min条件下1d不开裂,提高了特种电机的耐高温工作能力。     

Consolidation and self-bonding in poly(ether ether ketone) (PEEK)

The effects of processing variables (time, temperature, and pressure) on the strength development during self-bonding of amorphous PEEK films were studied using a modified single lap-shear test. It was shown that the self-bonding strength developed isothermally at different bonding temperatures exhibits a linear response with the bonding time raised to the 1/4 power in agreement with Wool's theory. DSC measurement of the crystallinity produced at different bonding conditions demonstrated that even though PEEK specimens contain the same amount of crystallinity, the resultant self-bonding strength is sensitively dependent on bonding history. C-mode scanning acoustic microscopy (C-SAM) was applied to define the effect of the processing variables on wetting of the bonding area during the bonding process. It was shown that, above a threshold pressure (< 17 psi), the degree of wetting depends weakly on time, but not on temperature. SEM analysis revealed that amorphous PEEK films are self-bonded by crystalline growth after diffusion and entanglement of the polymer chains across the interface. The crystalline growth rate across the interface is much higher at higher temperatures, leading to a higher self-bonding strength. The shear fracture surface observations also support the above result. The PEEK specimens showing the higher self-bonding strengths exhibit much denser striations and deeper dimplelike ductile patterns in the fracture surface, arising from much more crystalline growth across the interface. © 1995 John Wiley & Sons, Inc.     

不定形耐火材料技术发展动态

简介了不定形耐火材料在材质、结合方式、作业性能和调和用水量方面的发展趋势；叙述了自结合、自烧结和自流型不定形耐火材料的特性和优点。     

用于可焊性漆包线漆的聚酯多元醇的合成及性能测定

发展了一种聚酯多元醇,可望应用于制备新型的直焊性耐热漆包线漆。采用间苯二甲酸、己二酸、乙醇胺或乙二醇、三乙醇胺或甘油,通过熔融共缩聚合成一系列聚酯多元醇,然后用甲醚化氨基树脂及溶剂混合、配制成溶液,再涂制成漆包线。研究结果表明系列聚酯多元醇的分子量、酸值均符合漆包线漆制备的技术要求;采用乙醇胺代替乙二醇、三乙醇胺代替甘油在聚酯多元醇的合成反应中具有较高的缩聚反应活性,由此制备的聚酯多元醇具有在350℃至400℃的范围内更快速分解和分解残渣较少的特点,采用此聚酯多元醇作为主要成分、涂制的漆包线在400℃至460℃范围内下可直焊,介质损耗曲线的拐点温度可达到162℃、意味着耐热等级较高。     

聚氨酯漆包线直焊性能影响因素的分析

聚氨酯漆包线优异的直焊性能使其广泛应用在弱电电器产品中。通过对其直焊性能的分析，介绍了影响直焊性能的因素。     

Effect of electrical field on crazing test of enameled wire in water

We investigated the tendency to crazing to enameled wire under applying DC voltage in an electrolyte in the different conductivity. Crazing occurred in the enameled wire film in the case of connecting the wire to the negative pole, but did not occur in the film in the case of connecting the wire to the positive pole. It was found that the penetration of H₃O⁺ ion, due to electroosmosis, is the major factor for crazing.     

聚酯漆包线用漆和漆包工艺要求

从叙述聚酯漆的制备机理入手,联系漆包线生产的工艺流程,分析了聚酯漆膜的形成过程,并根据工艺特点对漆料提出了具体的技术要求.最后讨论了聚酯漆的稀释工艺、漆包线质量和漆料的关系.     

FW防伪涂料的研制和应用

介绍了以钴盐作为变色物质、不同的无机材料作为填料,研制了低温可逆示温涂料的工艺流程。通过变色颜料的变色原理的分析,解释了防伪涂料可逆变色现象。研究了温度、湿度及涂层厚度对涂料变色性能的影响。     

Stress Analysis of Adhesively Bonded Electroprimed Steel Lap Shear Joints

Structural applications for adhesive bonding have been increasing in recent years due to improvements in the types of adhesives available and in improved knowledge of bonding procedures. Consequently, there exists a demand for precise numerical modeling of adhesive joint behavior, particularly along bondline interfaces where low surface energy adhesives contact high surface energy metallic oxides. The purpose of the present study is to determine the effect of electrodeposited organic paint primer (ELPO) on the stress and strain distributions within an adhesively bonded single-lap-shear joint. Initial experimental studies have shown that bonding to ELPO-primed steel adherends has enhanced strength and durability characteristics compared to conventional bonds to unprimed steel surfaces. Recent studies based on finite element analysis of varied single-lap-shear joint moduli and thicknesses, and subsequent testing of joints with two different adhesive moduli, have indicated the mechanisms involved in this phenomenon. The presence of the ELPO-primer reduced peak peel and shear stresses and allowed for more uniform stress distribution throughout the joint.