饮料机械 果蔬机械 面食机械 糕点设备 烘焙设备 豆制品设备 乳制品设备 茶叶机械 制冷设备 油炸设备 膨化设备 糖果机械 调味品设备 薯类加工设备 酿酒设备
苏州安迪包装材料有限公司
苏州安迪包装材料有限公司
阅读：95发布时间：2021-5-8
静电是一种客观的自然现象，产生的方式很多，如接触、磨擦、冲流等等。其产生的基本过程可归纳为：接触 → 电荷 → 转移 → 偶电层形成 → 电荷分离。设备或上的静电高可达数万伏以至数十万伏，在正常操作条件下也常达数百至数千伏。由于自身的动作及与其它物体的接触-分离、磨擦或感应等因素，可以带上几千伏甚万伏的静电。静电是正、负电荷在部范围内失去平衡的结果。它是一种电能，留存在物体表现，具有高电位、低电量、小电流和作用时间短的特点。
静电控制的主要措施有：静电的泄漏和耗散、静电中和、静电屏蔽与接地、增湿等。
静电放电引起的元器件击穿损害是电子工业普遍、严重的静电危害，它分硬击穿和软击穿。硬击穿是一次性造成元器件介质击穿、烧毁或性失效;软击穿则是造成器件的性能劣化或参数下降。
静电敏感元器件和印制电路板在生产过程中工序之间的传递和储放，必须使用防静电上料箱、元件盒、周转箱、周转托盘等。以防止静电积累造成危害。静电敏感元器件和印制电路板，作为成品进行包装时必须采用防静电屏蔽袋、包装袋、包装盒、条、筐等，避免运输过程中的静电损害。
电子产品在生产过程中，其元器件、组件成品经常与设备工具等发生接触、分离，磨擦而产生静电，必须使用防静电坐垫、周转小车、维修包、工具、工作椅(凳)等，并通过适当的接地，使静电迅速泄放。
磨擦起电和静电是电子、微电子工业中的两大危害源，但产生静电并非危害所在，危害在于静电积累及由此产生的静电电荷放电，因此必须予以控制。带静电的物体，在其周围形成静电场，会产生力学效应，放电效应和静电感应效应。
由于静电的力学效应，空气中的浮游的尘粒会吸附到硅片等电子元器件上，严重影响电子产品的质量，因此，对净化工作空间必须采取防静电措施。
净化室的墙壁、天花板和地板等都应采用防静电的不发尘材料，对操作人员及工件、器具也应采取一系列的静电防护措施。
为了解生产过程静电起电情况，判别生产过程中静电的影响程度以及检验静电防护用品、装备质量都需要测量静电及有关参数。静电的测量，主要是对静电电压、材料电阻、接地电阻、静电关衰期、静电电量、静电消除器消电性能、布料电荷面密度等的测量。
静电防护工作是一项系统工程，任何环节的疏漏或失误，都将导致静电防护工作的失败，必须时时防范，人人防范。
How is the anti-static aluminum foil bag anti-static
Static electricity is an objective natural phenomenon, which can be produced in many ways, such as contact, friction, rushing and so on. The basic process of its production can be summarized as: contact → charge → transfer → formation of an even layer → charge separation. The static electricity on the equipment or on the device can reach tens of thousands to hundreds of thousands of volts, and it often reaches hundreds to thousands of volts under normal operating conditions. Due to its own actions and contact-separation, friction or induction with other objects, it can carry thousands or even tens of thousands of volts of static electricity. Static electricity is the result of the loss of balance between positive and negative charges within a certain range. It is a kind of electric energy, which has the characteristics of high potential, low power, small current and short action time.
The main measures of static electricity control include: static electricity leakage and dissipation, static electricity neutralization, static electricity shielding and grounding, and humidification.
The breakdown of components caused by electrostatic discharge is a common and serious electrostatic hazard in the electronics industry. It is divided into hard breakdown and soft breakdown. Hard breakdown is a one-time cause of dielectric breakdown, burnout or failure of components; soft breakdown is caused by deterioration of device performance or reduced parameters.
The transfer and storage of electrostatic sensitive components and printed circuit boards between processes in the production process must use anti-static loading boxes, component boxes, turnover boxes, turnover trays, etc. To prevent the accumulation of static electricity from causing harm. Electrostatic sensitive components and printed circuit boards must be packaged as finished products with anti-static shielding bags, packaging bags, packaging boxes, strips, baskets, etc., to avoid electrostatic damage during transportation.
In the production process of electronic products, the components and components of finished products often come into contact with, separate from equipment and tools, and generate static electricity due to friction. Anti-static cushions, turnover carts, maintenance kits, tools, work chairs (stools), etc. must be used, and Through proper grounding, static electricity can be discharged quickly.
Friction electrification and static electricity are the two major sources of hazards in the electronics and microelectronics industries, but the generation of static electricity is not the hazard. The hazard lies in the accumulation of static electricity and the resulting electrostatic charge discharge, so it must be controlled. An object with static electricity will form an electrostatic field around it, which will produce mechanical effects, discharge effects and electrostatic induction effects.
Due to the mechanical effect of static electricity, floating dust particles in the air will be adsorbed on silicon chips and other electronic components, which will seriously affect the quality of electronic products. Therefore, anti-static measures must be taken to purify the working space.
The walls, ceilings and floors of the clean room should be made of anti-static and non-dust materials, and a series of electrostatic protection measures should be taken for operators, workpieces and appliances.
In order to understａnd the static electricity in the production process, to determine the degree of static electricity in the production process, and to inspect the quality of electrostatic protection products and equipment, it is necessary to measure static electricity and related parameters. The measurement of static electricity mainly refers to the measurement of static voltage, material resistance, ground resistance, static turn-off period, static electricity quantity, static elimination performance, and surface density of cloth charge.
Electrostatic protection is a systematic project. Omissions or errors in any link will lead to the failure of electrostatic protection. It must be guarded from time to time and everyone should guard against it.
食品机械设备网 设计制作，未经允许翻录必究 .
请输入账号
请输入密码
请输验证码
请输入你感兴趣的产品
请简单描述您的需求
请选择省份