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A New Journey for Fluorochemicals: Longxin Drying Boosts Efficiency in Post-Processing of Fluoropolymer Materials
A New Journey for Fluorochemicals: Longxin Drying Boosts Efficiency in Post-Processing of Fluoropolymer Materials
Jul 09, 2026
As spring brings thriving vitality and a season of fruitful breakthroughs, Longxin Intelligent’s engineering and industrialization pilot base for micro & nano material manufacturing recently achieved full success in spray drying tests on ultra-fine PVDF lithium battery binder powder, developed to meet the demands of a leading fluoropolymer enterprise. Precise particle size control, outstanding batch consistency and ultra-low impurity content once again demonstrate Longxin Drying’s profound technical expertise in fluoropolymer post-processing.
From process route development to smooth commissioning of complete production lines, Longxin Drying has consistently delivered all-round post-processing solutions for fluoropolymer materials covering core procedures such as drying and purification to global clients, embarking on a brand-new chapter in fluoromaterial application alongside the industry.
Surging Market Demand: Dual Challenges of Quality Improvement & Efficiency Boost for Fluoropolymer Post-Processing
Driven by rapid growth of strategic emerging industries including new energy, semiconductors, 5G communications and aerospace, fluoropolymers, as critical new chemical materials, are embracing unprecedented development opportunities:
- As a widely adopted fluororesin, PTFE faces urgent demand for domestic substitution in high-end semiconductor and medical sectors.
- Fueled by explosive expansion of lithium battery industry, PVDF has become a core cathode binder, with its market scale projected to exceed 10 billion RMB.
- Amid the booming hydrogen energy sector, perfluorosulfonic acid resin (PFSA), the core material for proton exchange membranes, draws widespread attention for its domestic industrialization progress.
- High-performance fluoromaterials including FEP, PFA and ETFE see expanding applications in high-end cables, semiconductor clean systems, photovoltaic encapsulation and other fields.
Market requirements for material performance keep escalating toward ultra-fine particle size, ultra-high purity, stable molecular structure and superior batch consistency. Nevertheless, traditional post-processing workflows, especially drying and purification steps, have become core bottlenecks holding back industrial upgrading:
- Difficult quality control: Temperature-sensitive materials such as PVDF tend to suffer thermal decomposition and crystal transformation inside conventional dryers due to drastic temperature fluctuations, degrading adhesive performance. PTFE suspension resin is prone to extrusion agglomeration and wall adhesion during drying, with risks of foreign metal contamination, failing to meet strict cleanliness standards of high-end applications.
- Severe safety & environmental pressures: Fluoropolymer manufacturing frequently involves organic solvents such as NMP and ethanol. Conventional open drying leads to massive solvent loss and higher production costs, alongside fire and explosion hazards. Moreover, fluorinated substances may release corrosive gas under high temperature, posing threats to equipment and the environment.
- Low production efficiency & limited automation: Traditional processes mostly adopt batch operation with heavy manual reliance and low throughput. Full-process precise control from feeding to discharging cannot be realized, failing to satisfy stability and consistency requirements of large-scale industrial mass production.
Longxin Custom Solutions: Innovative Drying Technology Balances High Output & Premium Product Quality
To tackle the above challenges, drawing on in-depth understanding of fluoromaterial properties and decades of process experience, Longxin Drying has launched a series of innovative solutions covering post-processing of various fluoropolymers, reshaping industrial benchmarks with advanced equipment technology.
1. PVDF Slurry Airflow Spray Dryer: Revolutionizing Production of Battery-Grade Binders from Process Bottleneck to Intelligent Production Line
Tailored to the trend of ultra-fine pulverization of PVDF binders, Longxin developed a new-generation airflow spray dryer:
① Equipped with high-pressure two-fluid atomization technology, high-speed shear force from compressed air stably atomizes high-viscosity slurry into uniform droplets of 5–20 μm.
② Integrated PID intelligent regulation precisely matches the thermal stability requirements of PVDF molecular chains, effectively preserving β crystal form and guaranteeing cathode sheet peel strength.
③ The complete system adopts 200-mesh precision filtration and 316L mirror-polished inner walls, strictly limiting finished product impurity content to ppm level. An intelligent PLC system realizes fully automatic closed-loop control from feeding to powder discharging, supplying high-quality, highly stable intelligent line equipment for the billion-yuan binder market.
2. Suspended PTFE Airflow Drying System: Full-Link Optimization from Feeding to Cooling to Eliminate Contamination & Agglomeration of PTFE Powder
Developed for PTFE suspension resin featuring strong adhesion, severe agglomeration tendency and stringent cleanliness requirements, this fully optimized airflow drying system delivers multiple advantages:
① Adopts adjustable Venturi feeding technology to effectively prevent pipeline blockage.
② The main drying unit eliminates right-angle elbows, featuring large-curvature pipelines and mirror-polished inner walls (Ra ≤ 0.4 μm) to remove material dead zones and avoid wall adhesion & material accumulation.
③ An innovatively designed automatic flap valve replaces traditional rotary discharge valves, fundamentally eliminating product contamination by lubricants and friction debris.
④ Integrated multi-stage air purification (up to Class 100,000 cleanroom standard) and cooling sections achieve instant dehydration within 2–3 seconds to moisture content below 0.1%, followed by rapid cooling to under 40 ℃ for easy packaging, clearing critical obstacles for domestic production of high-quality PTFE.
3. PVDF & ETFE Flash Dryer: Intelligent Upgrade to Cut Costs & Boost Efficiency for Fluororubber Production
Longxin flash dryers serve as the optimal choice for filter cake/paste-like PVDF, ETFE intermediates and fluororubber materials:
① Combining crushing and drying functions, high-speed pulverizers instantly disperse wet materials, which fully contact tangentially fed hot air to realize fluidized drying.
② Intelligent temperature control and frequency conversion regulation precisely adjust outlet moisture content and fineness, slashing energy consumption and lifting production efficiency compared with conventional equipment, offering an energy-saving, high-throughput pathway for mass production of fluororubber and modified fluoromaterials.
4. PFSA Closed-Circuit Spray Dryer for Perfluorosulfonic Acid Resin: From Lab R&D to Industrialization, Supporting Mass Production of Hydrogen Fuel Cell Proton Exchange Membrane Materials
Addressing the core bottleneck of hydrogen energy materials, Longxin closed-circuit spray dryers act as pivotal equipment for large-scale PFSA manufacturing:
① Nitrogen serves as the inert circulating medium, paired with an online oxygen concentration analyzer to strictly control oxygen content below 1%, fundamentally eliminating fire/explosion risks of organic solvents and oxidative degradation of sulfonic acid side chains on resin molecules.
② Precision low-temperature drying technology (<150 ℃) safeguards the integrity of fluorocarbon backbones.
③ A high-efficiency multi-stage condensing recovery system recovers over 95% of solvents, drastically cutting production costs.
This equipment bridges the final gap between laboratory research and mass production for domestic proton exchange membrane manufacturers.
5. High-Purity PFA Filter-Wash-Dry All-in-One Unit: Breakthrough Post-Processing Tech for High-Performance Fluoromaterials, Reinventing Purification Processes for Fluoropolymers
Semiconductor-grade PFA demands zero tolerance for metal impurities and particulate contaminants. Longxin integrated filter-wash-dry units complete full-process closed operations including high-efficiency filtration, precision washing, vacuum drying and automatic discharging within a single sealed vessel:
① All inner walls and material contact surfaces undergo high-precision mirror polishing and passivation treatment to prevent metal ion precipitation.
② Sealed material transfer design blocks external contamination. Combined with high-efficiency washing and vacuum drying technology, the unit delivers PFA products meeting semiconductor-grade ultra-high cleanliness and low leaching standards, setting a new benchmark for purification workflows of high-end fluoromaterials.
Looking Ahead: Full-Value-Chain Processes to Drive Industrial Upgrading of Fluoropolymers
With years of dedicated research in new material purification and drying, Longxin Drying offers far more than standalone equipment — we possess in-depth process expertise covering every segment of material production. Clients gain access not only to high-performance individual machines, but also fully customized production lines and EPC general contracting solutions.
From process package development, equipment selection and system integration to automated control, our system solutions are precisely tailored to unique client demands, ensuring ultra-high efficiency and reliable quality across the entire workflow from raw material input to finished products. Our solutions maximize raw material utilization, while minimizing water and energy consumption via efficient heat circulation, solvent recovery and intelligent control systems. This not only delivers substantial economic benefits for clients, but also advances sustainable utilization of environmental resources.
Embark on a New Journey for Fluorochemicals
Committed to continuous technological innovation and comprehensive solution portfolios, Longxin Drying aims to be a trusted partner for fluoropolymer manufacturers. Together we will break through technical barriers and embrace a brilliant new era of new energy and advanced new materials.
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