1. Rapid Assembly: Socket Fusion Fittings utilize a hot-melt socket welding process. Welding is completed simply by inserting the pipe into the sleeve and heating for tens of seconds. The overall operation time is significantly shorter than the minutes or even hours required for traditional arc or gas welding. 2. Low O...
View More1. High Temperature Resistance Taking fluoroplastics (PTFE, FEP, PVDF, ETFE, PFA) as an example, their maximum operating temperature can reach 260℃, with a low temperature limit above -18℃. Conventional plastic piping (such as PPR and PVC) can be used stably for a long time below 90℃, but softening or even failure will...
View More1. Determine the Media Characteristics First, determine whether the medium being transported by the plastic pipe is water, oil, chemical solvents, or gas. Select materials based on its corrosiveness, viscosity, and temperature range. PPR is suitable for hot water, PVC for acid and alkali media, and PE-RT for low-temper...
View MoreWhat are PVDF raw material particles?
1. Definition: PVDF (polyvinylidene fluoride) raw material particles refer to white or semi-transparent powdered polymers obtained through polymerization processes. The chemical formula is –(C₂H₂F₂)ₙ–. They are commonly used in injection molding, extrusion, and compression molding to produce high-performance products such as pipes, valves, and membranes.
2. Morphology and Specifications: Particle sizes range from 10µm to 200µm. Different molecular weights and purities (≥99.5%) can be formulated according to customer needs to meet the stringent requirements of industries such as aerospace, semiconductors, and photovoltaics.
3. Applications: In fields such as solar photovoltaic modules, semiconductor manufacturing, chemical pipelines, ferroalloy smelting, environmental protection, pharmaceuticals, and aquaculture, PVDF particles are key raw materials due to their resistance to chemical corrosion, high temperature resistance, and excellent electrical insulation properties.
What are the main chemical and physical properties of PVDF raw material particles?
1. Chemical Properties
Molecular Structure: The repeating unit is –CH₂－CF₂－, giving the material excellent chemical inertness and resistance to acids, alkalis, halogens, and most organic solvents.
Corrosion Resistance: Within a wide temperature range of -40℃ to 150℃, PVDF exhibits extremely low permeability to fluorides, strong oxidants, and weak alkalis, making it suitable for pipes and valves in highly corrosive environments.
2. Physical Properties
Density: 1.74~1.80 g·cm⁻³, classifying it as a medium-density engineering plastic.
Melting Point and Thermal Stability: Melting point approximately 172℃, thermal decomposition temperature above 390℃, maintaining structural integrity during high-temperature processing.
Mechanical Properties: Tensile strength and impact toughness are superior to ordinary polymers, possessing good wear resistance, aging resistance, and UV resistance, making it suitable for long-term piping systems.
Electrical properties: It has a dielectric constant of about 5.6, high dielectric strength, and a piezoelectric/ferroelectric phase (β-phase) that enables self-sensing function, making it widely used in sensors and energy harvesting devices.
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