What is Kapton

By Bester PCBA

Last Updated: 2023-07-26

What is Kapton

Kapton is a term used in the PCB industry to refer to a specific type of polymer known as polyimide film. Developed by the DuPont Corporation in the 1960s, Kapton was created with the intention of producing a material suitable for flexible PCBs that can withstand high temperatures. This polyimide film is highly regarded for its exceptional thermal stability, remaining stable in a wide temperature range from -452 to 752 degrees Fahrenheit. This characteristic makes Kapton an ideal choice for applications in industries such as aerospace and automotive, where high temperatures are common.

In addition to its thermal stability, Kapton is also known for its ability to withstand various mechanical stresses. This makes it a suitable material for applications that require flexibility and durability, including foldable gadgets, portable appliances, and compact electrical systems. The development of Kapton by DuPont Corporation has significantly contributed to the advancement of technologies that rely on flexible and durable electronic systems, particularly in the field of creating flexible PCBs capable of withstanding high heat and mechanical stresses.

Frequently Asked Questions

What Is the Difference Between FR4 and Polyimide

Polyimide and FR4 have different applications in the field of PCBs. Polyimide is a flexible material that is commonly used for flex and rigid/flex boards, whereas FR4 is primarily used for rigid PCBs. Despite this, it is worth noting that polyimide is actually stronger than FR4, which contributes to its superior durability.

What Is Kapton Used For

Kapton tape is widely utilized in the electrical industry for various purposes. Its primary application is as an insulating material. This includes insulation for capacitors, transformers, coils, and magnetic wires. Additionally, it can be employed as a temperature mask during powder coatings.

What Is Kapton Made Of

Kapton is composed of pyromellitic dianhydride (PMDA) and 4,4′-oxydiphenylamine (ODA) through a condensation process. Additionally, Kapton E is a combination of PMDA, biphenyltetracarboxylic acid dianhydride (BPDA), ODA, and p-phenylenediamine (PPD).

What Is Polyimide PCB

Polyimide PCB material consists of synthetic polymers that incorporate imide monomer structures. These materials are commonly utilized in the fabrication of flexible PCBs, which, as the name suggests, have the ability to bend or twist.

What Is the Difference Between Mylar and Kapton

Kapton, a polyimide film made from the condensation of pyromellitic dianhydride and oxydiphenylamine, stands apart from Mylar due to its superior tensile strength, reliability, and ability to maintain excellent physical, electrical, and mechanical properties across a broad temperature range.