Automotive Applications

Polyvinylidene Fluoride
Automotive Applications
Automotive Applications
Kynar®, Kynar Flex® and Kynar 500® polyvinylidene fluoride (PVDF) resins exhibit high chemical and abrasion
resistance, excellent thermal stability, are unaffected by UV radiation, and are resistant to creep under
mechanical stress and load. Kynar® PVDF resins can be used for molded parts, for extruded profiles, or as
protective coatings.
Kynar ® PVDF is a thermoplastic fluoropolymer with a high melting point and excellent
mechanical properties, including cold flow and abrasion resistance. Kynar ® resin also
has exceptional chemical resistance, is unaffected by UV radiation and is resistant to
electrical arc tracking. Because of its unique chemical structure, Kynar ® PVDF produces
almost no smoke when exposed directly to flame and does not propagate fire like
polyolefins and PVC. Kynar ® fluoropolymer can be extruded as primary insulation
for wiring or used as a protective cover. Its excellent chemical resistance and high
melting point make Kynar ® PVDF well suited for applications “under the hood.”
Kynar ® PVDF insulated wire is commonly cross-linked by electron-beam radiation
to further increase its toughness, cut-through resistance and continuous-service
use temperature. If specifically formulated and processed, the cross-linked polymer
makes light-weight, flame-retardant wire insulation that offers a temperature rating up
to 175°C (347°F). Kynar ® PVDF is resistant to most solvents, fuels, lubricants and other
hydrocarbon fluids. Cross-linked Kynar ® PVDF insulation is commonly used in automotive T4
wire (150°C, 3000 hrs). This Kynar ® PVDF-based insulation has become a construction standard for major original
equipment manufacturers (OEMs) in the world. Originally developed for aerospace and military requirements as
Mil Spec 81044 wire, cross-linked Kynar ® PVDF insulation is widely used where environmental conditions demand
high performance in commercial and military electronics, satellites, ships, trains, automobiles and in aerospace
Kynar ® PVDF decorative films for automotive accessories
are both aesthetically pleasing and highly resistant to
corrosion and weathering. These films are used on a
variety of parts, such as rocker panels, roofing strips,
tail lamp housings, bodyside moldings, front and
rear bumpers, mirror housings and pillars. The films
can be processed with standard plastics equipment
and general polymer knowledge, thus requiring little
capital investment. Durable Kynar ® PVDF films are
applied to metal, PVC, PC, TPO and ABS, and can be
supplied with a heat-activated adhesive for bonding to
polyolefins. The films can be thermoformed to a shape,
trimmed and then placed into a mold. They can also
be laminated to flat stock sheets, then thermoformed
into the required shape. Films are also available with
pressure-sensitive adhesives for lamination under ambient
conditions. Kynar ® films are available in virtually any
color, including solid, metallic, pearlescent, chrome and
brushed aluminum.
Kynar® fluoropolymer films provide an attractive,
corrosion-resistant alternative to paint.
The strength, durability and versatility of Kynar® PVDF makes it suitable for automobile wiring harnesses,
fuel lines and fuel line coatings, decals, decorative films, coatings, electrochromic applications and plastic
optical fibers (POF). Conductive Kynar® 340 and Kynar® 3312C, can be injection molded and extruded and is
commonly used for handling aggressive, hot fuel mixtures.
Kynar ® polyvinylidene fluoride resin provides a barrier layer in low-permeation automotive fuel lines. The tubing
is a multilayer construction consisting of three or five layers in combination with Arkema’s Rilsan ® polyamide 11
or 12. The Kynar ® PVDF layer resists oxidative by-products and alcohol permeation in fuels and
helps carmakers meet strict EPA guidelines for hydrocarbon emissions. ADHEFLON ® tie resin
is used to bond the Kynar ® PVDF barrier to the RILSAN ® polyamide layers, resulting in
durable, flexible, low-permeation tubing.
In addition to being easily processed on conventional co-extrusion equipment, this
innovative fuel line construction exhibits excellent cold temperature impact strength
(-40°C), chemical resistance and dimensional stability. It is also compatible with a
wide range of fuel-alcohol blends and is available in a conductive version.
Kynar ® PVDF can also be used as a protective coating over carbon steel fuel and brake
fluid lines, and in under-chassis applications. Kynar ® PVDF can be applied in very thin
layers and maintains durability and corrosion resistance. It can also be applied as a liquid
coating, as a powder coating, or by cross-head extrusion.
Kynar Flex ® 2850 PC functional powder coating is a tough and weather resistant coating. This fluoropolymer
coating resists gasoline, road salt, oils, lubricants, brake fluid, transmission fluid, windshield washer fluid,
coolants, and battery acid. Kynar Flex ® 2850 PC powder coating may be used to coat carbon steel parts as a
low-cost alternative to stainless steel. This powder coating is durable and may be applied in very thick coatings
up to 100 mils (2.5mm).
Kynar Flex ® resin is corrosion resistant and unaffected by UV radiation, making it especially suitable for exterior
applications. Excellent chemical, physical, and mechanical properties allow Kynar Flex ® powder coating to be
used in chemical processing applications such as tank linings, valve and flange coatings, and pipe coatings
(exterior or interior). The powder is currently supplied in a natural, unpigmented form, though pigmented versions
can be prepared. Kynar Flex ® 2850 PC is typically applied by electrostatic spray over Kynar Flex ® 2850 PC
Kynar® ADX Resin
Rilsan® PA
Kynar ® ADX resin and other Arkema developed tie layers are
designed to bond to nylons, polyolefins and metals. Kynar ® ADX
melt processible resin bonds to various substrates, allowing cost
effecient engineering solutions and maintains nearly all of the
performance properties offered by Kynar ® PVDF. Kynar ® ADX
can be a protective barrier against fuel chemistry on the inside
or outside layer depending on the structure.
Kynar® PVDF
Rilsan® PA
For more information on Kynar® PVDF
Phone: 1-800-Kynar-50 (1- 800-596-2750)
The statements, technical information and recommendations contained herein are believed to be accurate as of the date hereof. Since the conditions and methods of use of the product and of the information referred to
herein are beyond our control, ARKEMA expressly disclaims any and all liability as to any results obtained or arising from any use of the product or reliance on such information; NO WARRANTY OF FITNESS FOR ANY
The information provided herein relates only to the specific product designated and may not be applicable when such product is used in combination with other materials or in any process. The user should thoroughly test any application before commercialization. Nothing contained herein constitutes a license to practice under any patent and it should not be construed as an inducement to infringe any patent and the user
is advised to take appropriate steps to be sure that any proposed use of the product will not result in patent infringement. See SDS for Health & Safety Considerations. Arkema has implemented a Medical Policy regarding the use of Arkema products in Medical Devices applications that are in contact with the body or circulating bodily fluids: (
Arkema has designated Medical grades to be used for such Medical Device applications. Products that have not been designated as Medical grades are not authorized by Arkema for use in Medical Device applications
that are in contact with the body or circulating bodily fluids. In addition, Arkema strictly prohibits the use of any Arkema products in Medical Device applications that are implanted in the body or in contact with bodily
fluids or tissues for greater than 30 days. The Arkema trademarks and the Arkema name shall not be used in conjunction with customers’ medical devices, including without limitation, permanent or temporary implantable
devices, and customers shall not represent to anyone else, that Arkema allows, endorses or permits the use of Arkema products in such medical devices. It is the sole responsibility of the manufacturer of the medical device
to determine the suitability (including biocompatibility) of all raw materials, products and components, including any medical grade Arkema products, in order to ensure that the final end-use product is safe for its end use;
performs or functions as intended; and complies with all applicable legal and regulatory requirements (FDA or other national drug agencies) It is the sole responsibility of the manufacturer of the medical device to conduct all
necessary tests and inspections and to evaluate the medical device under actual end-use requirements and to adequately advise and warn purchasers, users, and/or learned intermediaries (such as physicians) of pertinent
risks and fulfill any postmarket surveillance obligations. Any decision regarding the appropriateness of a particular Arkema material in a particular medical device should be based on the judgment of the manufacturer,
seller, the competent authority, and the treating physician.
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Kynar® and Kynar 500® are registered trademarks of Arkema Inc.
Adheflon® is a registered trademark of Arkema
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