Fluoroplastic series popular science knowledge No. 5: Polyvinylidene fluoride (PVDF) properties, applications, manufacturers, and commonly used models
Polyvinylidene fluoride (PVDF) is a special high-performance polymer material with many unique properties that make it widely used in a variety of applications. The following are the main properties and applications of PVDF resin:
Main performance
Chemical resistance: PVDF resin exhibits excellent chemical resistance and strong resistance to acids, alkalis, solvents and corrosive gases, making it widely used in fields such as the chemical industry and electronics industry.
Thermal stability: PVDF still maintains good stability at high temperatures and can be used in a wide temperature range.
Mechanical properties: It has good mechanical strength and rigidity, and has good tolerance to stretching and bending.
Electrical insulation: It has good electrical insulation properties and is suitable for electrical and electronic devices.
Weather resistance: Less impact on ultraviolet rays and climate conditions, with good weather resistance.
Flame retardant: PVDF has good flame retardant properties, making it applicable in some special flame retardant requirements.
Chemical stability: High chemical stability in acid and alkali solutions.
Application areas
PVDF is used as a cathode binder and separator coating in lithium batteries. Its adaptability to the working environment of lithium batteries is mainly due to its excellent aging resistance, low dielectric loss, and resistance to swelling in electrode solvents. Aging resistance: has a long cycle life; low dielectric loss: less intervention in the charging and discharging of the electrode; Swelling resistance: dissolves in the positive electrode slurry solvent NMP and is not easy to swell. The swelling of the battery binder will cause the electrode piece to The thickness increase and expand, which is not conducive to the battery’s charge and discharge cycle.
Non-homogeneous products with a wide range of terminal applications. The PVDF industry chain is relatively long, and its resource end is calcium carbide and fluorite. The two are prepared into basic raw materials such as acetylene and hydrofluoric acid, and then the key intermediate R142b is synthesized. R142b is the raw material for mainstream industrial preparation solutions of monomer VDF. In addition to being used in chemical production, it is also a Freon refrigerant. PVDF is a non-homogeneous product and has different grades. The non-homogeneity of PVDF products stems from differences in molecular weight, average degree of polymerization, end groups, monomers added during copolymerization, etc.
Different models of PVDF
Different models of PVDF products are suitable for different application scenarios. According to the application field, PVDF can be divided into conventional-grade products and lithium battery binder products. Conventional-grade PVDF is used in coatings, injection molding, filters, photovoltaic backsheets, separator coating, and other fields. Lithium battery binder PVDF is a higher-end product. Model is the most commonly used positive oil-based binder. Injection molding field: PVDF has excellent processing properties and can be processed into films, sheets, pipes, rods, etc. through extrusion molding and other methods. It has good chemical resistance, processability, fatigue resistance, and creep properties, and is often used in reactors.
Photovoltaic field: PVDF is an excellent photovoltaic backsheet fluorine film material. Its flame retardancy is better than traditional PVF materials. Its excellent weather resistance allows PVDF to be exposed to sunlight and air for a long time without aging, and its service life can reach 50 years.
Filtration membrane field
PVDF is not easy to absorb organic matter and has good anti-fouling properties. Compared with materials such as PES/PS/PVC membranes, it has oxidation resistance, resistance to frequent chemical cleaning, and high mechanical strength.
Lithium battery binder PVDF has a market penetration rate of up to 90% in all cathode binders. PVDF can bond active materials, conductive agents, and current collectors to the positive electrode, maintain the uniformity and stability of the active material during pulping, provide the required electron conduction in the electrode, and contribute to the battery’s capacity maintenance, service life, stability, etc. play a vital role.
PVDF manufacturers produce customized products according to different downstream application scenarios. Take Shandong Huaxia Shenzhou New Materials, a subsidiary of Dongyue Group, as an example. Its PVDF fluoro resin products have various models, which are divided into coatings, membranes, lithium batteries, moldings, etc. The price of lithium battery binder PVDF products is relatively high.
Cable insulation
Due to its superior electrical insulation properties, PVDF is widely used in the manufacture of cable insulation.
Chemical pipes and containers: It has excellent corrosion resistance and is used to manufacture chemical pipes, valves, pumps, and containers.
Electronic devices: In electronic devices, PVDF is used as a material for cable insulation, inductors, capacitors, and sensors.
Construction field: Used to manufacture weather-resistant building materials, such as exterior wall panels.
Medical devices: In the medical field, PVDF can be used to manufacture some medical devices with good biocompatibility.
Auto Parts: Due to its chemical and heat resistance, PVDF is used in the manufacturing of auto parts such as navigation systems, sensors, etc.
Energy field: PVDF has applications in energy storage and conversion, such as electrolyte membranes for lithium batteries and fuel cells.
Manufacturer and website
PVDF PolyVinylidene DiFluoride
Arkema (French Arkema company)
Website: https://www.arkema.com
Solvay (Belgian Solvay Company)
Website: https://www.solvay.com
Kureha Corporation (Japan Kureha Co., Ltd.)
Product number
Kynar 500: Coating primarily used in the building and construction sectors with excellent weathering and chemical resistance.
Kynar 740: used for cable sheathing, has good electrical properties and chemical stability.
Kynar Flex: A flexible PVDF suitable for applications that require bending and deformation, such as flexible pipes.
Kynar Aquatec: PVDF resin for water-based coatings for metals, plastics, and other substrates.
Kynar Film: Used to make thin films with excellent electrical insulation properties.
Solef® 6010 – NC
PVDF American Solvay 1008
PVDF American Solvay 1008-001
PVDF American Solvay 1015 (Pink)
PVDF American Solvay 20810-0.1
PVDF American Solvay 20810-19
PVDF American Solvay 20810-20
PVDF American Solvay 20810-3
PVDF American Solvay 20810-30
PVDF American Solvay 20810-32
PVDF American Solvay 20810-47
PVDF American Solvay 20810-55
PVDF American Solvay 21216 (Pink)
PVDF American Solvay 460-NC
PVDF American Solvay 5130
PVDF American Solvay 6008
PVDF American Solvay 600
Jinjie New Materials Co., Ltd. has some models of PVDF materials in stock, please contact us for quotation
