论文部分内容阅读
近来,美国一家公司开发一种新型耐热电气绝缘材料——非磁性纸。这种复合材料,是把特殊的非磁性纸用聚酰胶树脂粘成积层板而投放市场的,其规格有5～10层不等,用它来可做:1.精制塑料注射成型机的绝热板;2.印刷线路复合冲床缓冲垫;3.铅基衬垫等。当用“非磁性纸”积层板作精制塑料注射成型机的绝热板时,比往常用的石棉板、硅玻璃、酚醛塑料传热率低,其传热率可降至0.15公斤·卡/米·时·℃,并且显著改善尺寸精度(厚度),使其偏差值由原来的5～10％降至1％。当用“非磁性纸”积层板作(印刷线路板)复合冲床缓冲垫时,和往常用的橡胶垫、毛毡、牛皮纸完全不同,可长期保持恒定的弹性;由
Recently, a U.S. company developed a new type of heat-resistant electrical insulating material, non-magnetic paper. This composite material is put on the market by laminating special non-magnetic paper with a polyacryl resin, and its specifications range from 5 to 10 layers, and it can be used to do the following: 1. Refined plastic injection molding machine Of the insulation board; 2. Printed circuit composite punch cushion; 3. Lead-based pad. When “non-magnetic paper” laminates are used as insulation panels for refined plastic injection molding machines, the heat transfer rate can be reduced to 0.15 kg · kg / M · · ℃, and significantly improve the dimensional accuracy (thickness), the deviation from the original 5 ~ 10% down to 1%. When using “non-magnetic paper” laminates as (composite) cushion punch (printed circuit board), and commonly used rubber mat, felt, kraft paper is completely different, long-term to maintain constant flexibility; from