Medium and High voltage wire spare parts in front of the use of a relatively large number of production categories secondary to heat shrinkable casing wire spare parts, prefabricated wire spare parts, cold shrinkage wire spare parts. They identify with secondary characteristics:

1, hot shrinkage wire spare parts

The data used are normal to be composed of a variety of data components such as polyethylene, ethylene-vinyl acetate (EVA) and ethylene propylene rubber. Such goods are secondary to the adoption of stress tubes to solve the electrical stress set results. That is, the parameter mastery method is adopted to relieve the magnetic field stress set.

Minor advantages: Bulky, simple device, good function, cheap price.

The stress tube is a kind of thermal expansion tube with a moderate volumetric resistivity (10^10-10^12Ω/cm) and a special electrical parameter with a large dielectric constant (20–25), and the stress dispersion at the fracture of the insulation barrier of the electrical parameter is applied to a more symmetrical dispersion along the stress tube. This skill can only be used for 35kV and sub-wire spare parts. Because the voltage title is high, the stress tube will be feverish and not able to secure the task.

In its application, the performance of heat shrinkable pipe damage is: to ensure that the electrical parameters of the stress tube must reach the above standard rule value in order to secure the task. In addition, we should pay attention to the use of silicone grease filled gas line insulated semi-thermal conductive layer fracture out of the air gap to remove the gas, to reduce all the tip discharge means.

Cross-linked wires due to internal stress solution is not good when the attack will have a large expansion, so in the installation of spare parts to pay attention to the stress tube and insulation barrier planks is not less than 20mm, to prevent expansion of the stress tube and insulation barrier detachment.

Thermal shrinkage wire spare parts because of the small inertia, in the operation of the thermal expansion and contraction can make the interface production vitality Gap, so the sealing skills are very important to prevent moisture immersion.

2. Prefabricated Wire Spare parts

The data used are normally silicone rubber or ethylene propylene.

The secondary adoption of how many tectonic method is the stress cone to solve the stress set performance.

Secondly, the advantages: The data function is high quality, the device is more cumbersome and fast, does not need heating can be installed, the inertia is good, causes the interface function to lose the big improvement.

Liquid Flexible Packaging Film printing double-walled heat shrinkable pipe brush process attention to the problem of the choice of suitable materials. In the actual property, should be based on the automatic filling machine filling schedule, sterilization premise, product shelf life and other detailed information to choose the appropriate printing packaging film and printing ink, and according to the actual situation to adjust and control the printing process parameters, standardize the process flow, cover the printing quality of the film. Polyamide printing ink so its water resistance, oil resistance is not good, liquid packet ink is generally not immutable selection; Polyurethane ink also has a consistent type, selection should have a alignment, the new Western Super Liftin 313A ink is generally only used for soft co-extrusion PE film, and type 314 is shared with all kinds of coextrusion PE heat shrinkable casing. Color printing manufacturers used in the co-extrusion PE film is generally the manufacturers of their own blowing film, the level of craftsmanship, so the keeper to dominate the selection of good masterbatch, should be used without a refreshing agent model of the Masterbatch, the choice of PE film through the Splash engaged, the heart can reach a minimum of 40, preferably more than 42.

The post-processing premise or test standard of the depositor. Color printing manufacturers only high-temperature heat shrinkable pipe in the full inspection of food manufacturers in the filling of the premise and this current processing process, and even liquid packets in the shopping malls obscure links to ensure that the pointless, the heart is rare. The first point of attention includes: filling progress, sterilization premise, shelf life length, preservation to ensure.

In order to ensure the printing process. In order to cover the printing quality of liquid packaging film, in the printing process must also pay attention to the printing tension, printing pressure, printing progress and monotonous heat and other process premise of the control, create a set of static and reliable process standards, standardize the process flow, to ensure the smooth continuation of the planning property. In other words, the comprehensive nature of the printing workers, ink manufacturers to provide the craft information, the quality of the thinners black and white, the change of the group situation and so on is not to ignore the factors.

Control the printing situation well. The change of temperature and humidity in the printing group has a keeper of the performance of the substrate material and ink, the situation is too monotonous will cause the film static electricity, constitute the printing hardship; The situation is too wet will make the ink monotonous is not sufficient, the solid degree of the ink layer.

高压电线备件分析及PE热缩套管印刷细节

中高压电线备件眼前运用得比较多的产种类类次要有热缩套管电线备件、预制式电线备件、冷缩电线备件。它们辨别有以次特性：

1、热缩电线备件

所用资料正常为以聚乙烯、乙烯-乙酸乙烯（EVA）及乙丙橡胶等多种资料组分的共混物组成。此类货物次要采纳应力管解决电应力集合成绩。亦即采纳参数掌握法缓解磁场应力集合。

次要长处：笨重、装置简单、功能尚好、价钱廉价。

应力管是一种容积电阻率适中（10^10-10^12Ω/cm），介电常数较大（20–25）的特别电性参数的热膨胀管，应用电气参数胁迫电线绝缘屏障断口处的应力分散成沿应力管较匀称的散布。这一技能只能用来35kV及以次电线备件中。由于电压头衔高时应力管将发烧而没有能牢靠任务。

其运用中要热缩管害技能成绩是：要保障应力管的电性参数必需到达上述规范规则值方能牢靠任务。此外要留意用硅脂填充气线绝缘半导热层断口出的气隙以扫除气体，到达减小全部尖端放电的手段。

交联电线因内应力解决没有良时正在运转中会发作较大膨胀，因此正在装置备件时留意应力管与绝缘屏障搭盖没有少于20mm，以防膨胀时应力管与绝缘屏障脱离。

热缩电线备件因惯性较小，运转中热胀冷缩时能够使界面产活力隙，因而密封技能很主要，以预防水分浸入。

2、预制式电线备件

所用资料正常为硅橡胶或者乙丙橡胶。

次要采纳多少何构造法即应力锥来解决应力集合成绩。

其次要长处：资料功能优质，装置更烦琐快速，无需加热即可装置，惯性好，使得界面功能失去较大好转。

液体软包装膜印双壁热缩管刷历程中注意问题取舍合适的材料。在实际物产中，应该根据自动灌装机的灌装进度、杀菌前提、产物保质期的长短等详尽情况来取舍合适的印刷包装膜和印刷油墨，而且根据实际情况调整和节制印刷工艺参数，规范工艺流程，包管地膜的印刷品质。聚酰胺表印油墨所以其抗水性，耐油脂性欠好，液体包油墨一般不克不迭选用；聚氨酯类的油墨也有一致的类型，选用时要有对准性，新西方超力福313A型油墨一般只用来软质共挤PE膜，而314型则合用来各类共挤PE热缩套管。彩印厂家所用的共挤PE膜一般是厂家自己吹膜而成，手艺水平纷歧，因此管保要主宰好母料的选型，宜用不含爽滑剂型号的母料；选用的PE膜经由焊花从事后，内心能最低要抵达40达因，最好超过42达因。

存户的后加工前提或测试标准。彩印厂家只有高温热缩管在充分考察食物厂家在灌装时的前提以及这当前加工的工艺，乃至液体包在商场上晦涩环节的底细务求，才能做到无的放矢，心中罕见。首要的注意点包罗：灌装进度，杀菌前提，保质期长短，保存务求等。

印刷工艺的务求。为了包管液体包装膜的印刷品质，在印刷历程中还必须注意对印刷张力、印刷压力、印刷进度和单调热度等工艺前提的节制，创制一套一成不变可靠的工艺标准，规范工艺流程，确保规划物产的顺畅继续。别的，印刷工人的综合性质、油墨厂家所供给的手艺资料、稀料的品质黑白、小组状况的转变等也是不成忽略的因素。

节制好印刷状况。印刷小组内温湿度的转变对承印物材料和油墨的性能都有管保的莫须有，状况过于单调会引起地膜静电，构成印刷坚苦；状况过于潮湿会使油墨单调不充分，莫须有墨层的扎实度。