用于3D打印的Kapton加热器

 
 
为什么使用Kapton加热器发热不好？
之所以使用热床，是因为  它们通过保持挤出的塑料温暖并大大防止翘曲，从而大大提高了打印质量  。与零件内部的塑料相比，翘曲是由零件边缘的塑料以不均匀的速度冷却而引起的常见情况。结果是拐角弯曲并使模型变形


过去，使用筏等技术（在比最终零件大的材料“筏”上建造零件，然后将零件的表面积增加）来防止变形。附着力-从而防止翘曲）。


Derived from the raft, mouse ears are a clever and effective technique to make sure that the corners of your prints are well secured to the platform and won’t lift. Although they offer greater adhesion by increasing the surface area for your part to grip onto the bed, they are not 100% effective without a heat bed. Sometimes the warping forces are simply too great and can overcome the mouse ears.

Heat beds work to prevent this warping effect by keeping your part warm during the whole printing process which keeps the material at or above heat-deflection temperature (the temperature at which it is malleable). Keeping the parts in the heat-deflection range ensures that the part remains flat on the print bed. Heat beds, in combination with other tools to increase adhesion, will be covered in this article to bolster your ability to fight unwanted effects and improve your printing quality.
In addition to a heat bed surface, most  users will experience that some form of adhesive or method is required to make PLA or ABS stick properly. This is where Kapton tape, painter’s tape, glue or hairspray comes into play.

Kapton or polyamide is well know as a tape of choice for print surfaces, because of its heat resistance, smooth finish and high adhesion for PLA. Now think about two films of polyamide with a heating element sandwiched in between, now you have a polyamide film heater. Obviously, these are very thin, easy to install with an adhesive back, reliable and heat really fast. They have an integrated thermistor and are provided, unlike the PCB heat bed, in an unlimited variety of shapes. For these reasons, this is the type of heater foil we use on our latest 3D printer

Painter’s tape is an ideal product for printing ABS with a heat bed because of it’s textured surface increasing adhesion. We’ve used it with varying degrees of success and others report great results as well.
As far as PLA is concerned, our experience is that it doesn’t stick well to heated painter’s tape and that painter’s tape itself doesn’t stick well to the glass when heated. However, we found that PLA sticks very well to Kapton tape which is typically layered to cover the entire print area. The Kapton tape needs to be periodically replaced and this process can be tedious. To remove this obstacle, you can buy Kapton tape in wider rolls which means you need to layer a lesser amount of strips onto the print area to fully cover it.

All the heat sources mentioned in this article will typically need an added surface to preserve the quality & integrity of the heating element over time or to provide protection in the event of a hotend collision. Obviously, the aluminium clad heaters are always used in conjunction with a surface.
The recommended print surface to be used with a PCB or Polymide film heater is a borosilicate glass, or when unavailable, a tempered glass. For the PCB heat bed, we recommend layering Kapton tape or using a thin glass (2 mm) over-top.

Product Introduction

Flexible Kapton Polyimide Film Heater For 3D Printer

Polyimide is a thin, translucent material, has excellent dielectric strength. In the narrow space or require lighter, heater exposed to vacuum, oil or chemicals application environment, polyimide heaters are ideal. Compared with silicone heating film, PET film or ceramic electric heating film, polyimide is more compact.

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Polyimide Film Heater Characteristics

1) Heater thin and light so you can just position on the need for heating without heating part can be avoided.
2) Etched foil heating technology provides fast and efficient heat transfer and uniform heating surface, the temperature difference is minimal.
3) Customization options (for example: SMT components, flex cable and connectors) can provide the perfect complete solution that can significantly reduce assembly time and increase productivity.
4) Custom configured to provide balanced heating output performance to improve process yield and productivity, in accordance with requirements of additional temperature control device and temperature sensing devices.
5) There FEP adhesive can be 200 ° C (392 ° F) 
6) Suitable for vacuum environments (NASA-RP-1061)
7）耐大多数化学药品：酸和碱性溶剂的侵蚀8）如果使用聚酰亚胺绝缘电线（定制选项）可以抵抗106拉德的辐射，则可以安装PSA胶粘剂贴纸或环氧胶，硅酮胶安装剂。9）提供各种复杂的形状设计和不同的电源设计。可以设计同一块电加热加热回路中的膜并保持回路10）提供液浸设计（非标准）


产品参数

电暖器

聚酰亚胺薄膜加热器

工作温度范围°C（°F）

-60C（-76）-220C（428）

根据ASTM KV / mm在20°C时的介电强度

205

100°CW / mk时的导热系数

-

弯曲半径，最小mm

0.8

电阻公差

±7.5％或±5％

最大尺寸mm

W：500，L：900

厚度mm

0.13-0.4

工作生涯

180°C时10Khr

主要用途

1.医疗诊断工具：加热样品盘，试剂瓶等。2 . 加热次级行星组件。3.在冷空气中保护飞机的机械和电子设备。4.测试或模拟IC。5.室外电子设备，如读卡器和液晶显示器。6，保持分析仪常数