Polyimide Films


Extreme Versatility and Thermal Performance Provides Unlimited Potential

From the circuits in the cameras on space missions to the next generation of photovoltaic cells, DuPont™ Kapton® polyimide films are helping make extraordinary new design possibilities actually happen.

For applications where extremes of heat and vibration are the norm, designers rely on Kapton® because of its ability to maintain its unique combination of mechanical properties under the harshest of conditions.

DuPont™ Kapton® polyimide films have set the industry standard for over 45 years in high performance, reliability and durability, with a unique combination of electrical, thermal, chemical and mechanical properties that withstand extreme temperature, vibration and other demanding environments.


Polyimide Film Products

  • Kapton® Polyimide films

    Maintains its unique combination of mechanical properties under the harshest of conditions.

    DuPont™ Kapton® B polyimide film exhibits an excellent balance of physical, chemical, and electrical properties over a wide temperature range, with superior dimensional stability at elevated temperatures. The matte black color of Kapton® B provides a uniform, aesthetically pleasing appearance while maintaining key physical properties. The homogeneous pigmentation provides better color integrity against flexural cracking or abrasion in comparison to black coatings or dyes. These characteristics make it ideal for use in many industrial applications where opacity, low reflectivity, or aesthetics are required.

    DuPont™ Kapton® corona resistant film is a state of the art polyimide film that withstands the damaging effects of corona discharge. The corona resistance of Kapton® 100CRC film provides improved service life and operational efficiencies beyond that of conventional insulation materials. In addition to the corona resistant properties, Kapton® CRC offers excellent, physical, electrical, thermal, and chemical resistant characteristics expected with Kapton® polyimide films. Kapton® CRC polyimide film has been developed for use as an electrically insulating material for high voltage environments where the potential for corona discharge is present. Kapton® CRC is typically used in industrial motor and generator applications as magnet wire, turn to turn strand, coil, slot liner and ground insulation materials. It has also been used to form laminates with other materials, such as DuPont™ Nomex® paper or mica insulations, to provide a tailored electrical insulation property.

    DuPont™ Kapton® EN is a premium performance polyimide film for use as a dielectric substrate for flexible printed circuits and high density interconnects. Kapton® EN is the preferred dielectric film for very fine pitch circuitry due to its superior dimensional stability, lay-flat, high modulus, and a coefficient of thermal expansion match to copper. Kapton® EN is offered in a wide range of thickness from 5 µm ultra-thin to 50 µm thick, which provides more design flexibility to the customer. The excellent electrical characteristics and chemical etchability inherent to Kapton® HN and VN films have been maintained in Kapton® EN polyimide film. Kapton® EN film also has very low moisture absorption and is laser ablatable.

    DuPont™ Kapton® 150FWN019 is a two-layer, polyimide, FEP fluoropolymer dispersion-coated heat-fusible composite film with a unique balance of excellent physical, electrical, thermal durability and chemical resistance properties. 150FWN019 has superior scrape abrasion resistance and motor manuacturers have reported that wire insulated with 150FWN019 exhibits lower frictional properties than wire insulated with other commonly used polyimide materials. 150FWN019 is ideal for demanding magnet wire applications. and for difficult-to-wind motors.

    Kapton® 150FWR019 film is constructed of a 1.0 mil Kapton® polyimide film with 0.5 mil of FEP fluoropolymer on one side.

    The properties of DuPont™ Kapton® 150PRN411 make it suitable for insulating copper conductor used in high temperature magnet wire applications where improved adhesion between layers and abrasion resistance are desired. Kapton® 150PRN411 polyimide film consists of a layer of 25 micron thick Kapton® HN polyimide film between two layers of high melt temperature fluoropolymer. One of the fluoropolymer layers is approximately ten microns thick and the second layer is approximately three microns thick.

    Preferred dielectric films for very fine pitch circuity and next generation IC packaging application.

    General purpose HN film coated or laminated on one or both sides with a FEP fluoropolymer.

    Film is treated on both sides and has an excellent balance of physical, chemical and electrical properties over a wide temperature range.

    Enables excellent “in plane” thermal conductivity when converted into artificial graphite sheet. Used as a thermal dissipative material in a variety of applications to consumer electronics such as cell phones and tablet computers

    Recommended for applications that require an all-polyimide film with an excellent balance of properties over a wide range of temperatures.

    Recommended in applications where low shrinkage and superior adhesion are important.

    These films with thermal conductivity of 0.45 W/m·K can be used alone or combined with other materials as a laminate for added functionality. Kapton® MT film comes in a variety of thicknesses, even as thin as a little over 25µm.

    These films with superior thermal conductivity of 0.8 W/m·K are available as thin as 38 µm up to 127 µm. Lowers operating temperature by 20–45°C in e-motors as a NKN slot liner. Increases power output by 10-30% for PTC heaters.

    Tough film that exhibits an excellent balance of physical, chemical and electrical properties over a wide temperature range, particularly at unusually high temperatures.

    Widely used as a dielectric substrate for its high temperature resistance, self extinguishing burn characteristics, toughness and flexibility.

    Electrically conductive film for applications in which a precisely controlled surface resistivity is needed.

    Kapton® type XP provides a type H film coated on one or both sides with a proprietary fluorocarbon resin which provides excellent mechanical strength and adhesive properties at elevated temperatures. In addition, high level bond strengths of XP to copper, itself or other materials are maintained at elevated temperatures. The four graphs included with this bulletin compare retention of bond strength of type FN and type XP from room temperature to 200°C. Kapton® XP exhibits the same chemical stability, electrical properties, and mechanical strengths in high and low temperature environments as has been demonstrated with Kapton® FN. Availability Both 2 mil Kapton® XP (919) and 1.5 mil XP (019) are in inventory. Other constructions can be made available as market applications and needs develop. Substrate preparation and electrical, mechanical and chemical data can be found in the Kapton® Summary of Properties booklet (EI-10142).

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