OBA stocks a full range of flexible electrical insulating materials. Temperature classifications range up to 220°C. With a broad range of materials that have varying performance characteristics we are sure to have a product to meet your requirement.
Insulations - Flexible
HYPLY - Elephantide / PolyfilmGENERAL HYPLY composites are flexible sheet materials with high mechanical strength produced by bonding polyester film to Elephantide electrical paper using synthetic adhesive. The polyester film enhances the electrical characteristics of the Elephantide and also greatly increases bursting strength. The electric strength is of the order of 12 kV per millimetre. HYPLY is rated as a Class E (120°C) insulation. APPLICATIONS HYPLY composites find use predominantly as electric motor slot and overhang insulation on Class E rated machines. These composite materials are also used in air and oil cooled transformers and on domestic appliances, as terminal shields, etc. HYPLY composites being mechanically strong are able to withstand the rigours of automatic slot liner insertion machines and also the subsequent automatic winding of stators, etc. The composites will punch and ‘crease’ form into finished components without major loss of electric strength. TYPICAL PROPERTIES
CONSTRUCTION
Download: DMD -Polyester Mat / Polyester Film / Polyester MatGENERAL Triple layer, polyester mat/polyester film, laminates are constructed of high density polyester mat and electrical grade polyester film bonded by a special bonding system designed to prevent delamination. APPLICATIONS The laminate is suitable for use in fractional to the largest rotating electrical equipment as slot, phase and end turn insulation. It can also as ground and wrapper insulation in dry type transformers as well as in a variety of punched and fabricated parts. THERMAL PROPERTIES These laminates meet the requirements of MIL-1 -22834 and MIL-1-91 7D and have both Class B (130°C) and Class F (155°C) Underwriters Laboratories recognition for motors, transformers and coil assemblies. The DMD, polyester mat/polyester film laminates meet the requirements for Hermetic systems. The polyester film contributes high dielectric strength, tear, tensile, and burst strengths. The high density polyester mat in combination with the special bonding system adhesive and top coating provides exceptional heat stability. Download: Polyester FilmGENERAL Polyester film is translucent (milky), flexible, has high tensile strength, tear resistance and shear strength. It is insensitive to oils, greases and solvents, does not contain plasticisers and in normal conditions is unaffected by ageing. In addition it has high dielectric properties. APPLICATIONS Polyester film is used in a wide range of industrial applications, such as: TYPICAL PROPERTIES
ELECTRICAL PROPERTIES
THERMAL PROPERTIES
Download: Kapton® VN Polyimide FilmGENERAL Kapton® VN Polyimide general-purpose film exhibits an excellent balance of physical, chemical and electrical properties over a wide temperature range, with superior dimensional stability at elevated temperatures. APPLICATIONS Kapton® HN is recommended for applications that require an all-polyimide film with an excellent balance of properties over a wide range of temperatures. Typical applications are as follows: ELECTRICAL PROPERTIES
Download: Kapton® HN Polyimide FilmGENERAL Kapton® VN Polyimide general-purpose film exhibits an excellent balance of physical, chemical and electrical properties over a wide temperature range, with superior dimensional stability at elevated temperatures. APPLICATIONS Kapton® HN is recommended for applications that require an all-polyimide film with an excellent balance of properties over a wide range of temperatures. Typical applications are as follows:
ELECTRICAL PROPERTIES
NPN - Nomex®/Polyester Film/Nomex®GENERAL Nomex®/Polyester Film/ Nomex® laminates, commonly known as NPN or NMN, uses electrical grade polyester film bonded with a special bonding system designed to prevent delamination. These three-ply laminates have Underwriters Laboratories Class H (180°) recognition for motors, transformers and coil assemblies. APPLICATIONS These laminates are suitable for use as slot, phase and end turn insulation as well as ground and wrapper insulation in dry type transformers and a variety of punched and fabricated parts. PHYSICAL & ELECTRICAL PROPERTIES
Download: NKN - Nomex® / Kapton® / Nomex®GENERAL The polyimide film contributes high dielectric, tear and tensile strengths. The calendared aramid paper protects the film from mechanical damage, provides formability and a good surface for adhesion of varnish. NKN triplex laminates is constructed of calendared aramid (Nomex) paper, bonded with polyimide film (Kapton) using a specialized bonding system. APPLICATIONS The laminates are suitable for use as slot, phase and end turn insulation as well as ground and wrapper insulation in dry type transformers THERMAL PROPERTIES These polyimide and aramid paper laminates are suitable for continuous operation at 220ºC. PHYSICAL & ELECTRICAL PROPERTIES Download: Nomex 410GENERAL Type 410 is a calendared insulation paper which offers high inherent dielectric strength, mechanical toughness, flexibility and resilience. Type 410 is the original form of Nomex paper and is widely used in a majority of electrical equipment applications. APPLICATIONS Type 410 is used in almost every known application for electrical sheet insulation. THERMAL PROPERTIES The effects of long-time exposure of Nomex to high temperature are the basis for the recognition of Nomex paper as insulation suitable for use in 220°C by Underwriters laboratories, the U.S. Navy, and others, and are confirmed by more than 25 years’ commercial experience. CHEMICAL STABILITY The compatibility of Nomex aramid paper with virtually all classes of electrical varnishes and adhesives (polyimide’s, silicones, epoxies, polyesters, acrylics, phenolics, synthetic rubbers, etc.) is demonstrated by the many UL recognised systems. Nomex papers are also fully compatible with transformer fluids (mineral and silicone oils and other synthetics) and with lubricating oils and refrigerants used in hermetic systems. ELECTRICAL PROPERTIES
Download: Nomex 411GENERAL Type 411 is the uncalendared precursor to Type 410. It is available in five thicknesses (5(.13mm) to 23 mils (.58mm), with a specific gravity of .3. It has lower electrical and mechanical properties than 410 APPLICATIONS It is used in applications such as motor phase insulation and transformer coil end filler, where high bulk and conformability are of prime importance. Type 411 offers increased impregnability and saturability when compared to type 410. THERMAL PROPERTIES The effects of long-time exposure of Nomex to high temperature are the basis for the recognition of Nomex paper as insulation suitable for use in 220°C by Underwriters laboratories, the U.S. Navy, and others, and are confirmed by more than 25 years’ commercial experience. CHEMICAL STABILITY The compatibility of Nomex aramid paper with virtually all classes of electrical varnishes and adhesives (polyimide’s, silicones, epoxies, polyesters, acrylics, phenolics, synthetic rubbers, etc.) is demonstrated by the many UL recognised systems. Nomex papers are also fully compatible with transformer fluids (mineral and silicone oils and other synthetics) and with lubricating oils and refrigerants used in hermetic systems. ELECTRICAL PROPERTIES
Download: Nomex 414GENERAL Type 414 is designed for applications requiring a strong, yet flexible and conformable sheet. It is electrically and thermally similar to Type 410, but is calendared under different conditions to provide its unique properties, including high tear strength. APPLICATIONS Type 414 was designed for use as slot insulation in hand – wound motors and for linear wrapping of wire, but is also used in other applications where its specific characteristics are desirable (such as folded or punched parts). THERMAL PROPERTIES The effects of long-time exposure of Nomex to high temperature are the basis for the recognition of Nomex paper as insulation suitable for use in 220°C by Underwriters laboratories, the U.S. Navy, and others, and are confirmed by more than 25 years’ commercial experience. CHEMICAL STABILITY The compatibility of Nomex aramid paper with virtually all classes of electrical varnishes and adhesives (polyimide’s, silicones, epoxies, polyesters, acrylics, phenolics, synthetic rubbers, etc.) is demonstrated by the many UL recognised systems. Nomex papers are also fully compatible with transformer fluids (mineral and silicone oils and other synthetics) and with lubricating oils and refrigerants used in hermetic systems. ELECTRICAL PROPERTIES
Download: Varnished Glass ClothGENERAL Varnished Glass Cloth a polyester coated closed weave glass fabric with 180ºC. thermal capability it has good flexibility, with exceptionally high tensile and tear strength. APPLICATIONS Varnished Glass Cloth is recommended for a wide variety of uses in the motor and transformer industry including phase separators, slot liners, barrier and layer insulation, bus bar, and coil wrapping, to name but a few. THERMAL PROPERTIES Thermal aging tests conducted in accordance with both A.S.T.M. D-902 (Volatility Index of Coated Woven Glass Cloth) and A.S.T.M. D-1 830 (Curved Electrode Test) have proven that the cloth has a thermal endurance in excess of 50,000 hours at 180ºC. ELECTRICAL PROPERTIES
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