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Views: 0 Author: Heming Paper Expert Ferrill Publish Time: 2026-07-28 Origin: heming-paper
Demand for high-performance aluminum electrolytic capacitors continues to grow in 2026, driven by 5G telecommunications, renewable energy systems, and electric vehicles (EVs). At the core of these components is a critical specialty material: electrolytic capacitor paper (commonly called capacitor separator paper).
China remains the global center for the production of this technically demanding paper. Whether you need ultra-low ESR, high breakdown voltage, or precision custom slitting, choosing a reliable supplier affects capacitor lifetime, capacitance stability, and production yield.
This updated 2026 ranking evaluates the top 10 manufacturers in China based on production capacity, R&D capability, and global market presence — with practical buyer concerns in mind (MOQ, lead time, certifications). Procurement teams should request datasheets and samples to verify voltage ratings, electrolyte compatibility, and material specifications before placing orders.
Headquarters: Quzhou, Zhejiang Company Highlight: Factory-direct innovator with large-scale specialty production
Heming Paper is a subsidiary of Xianhe Corp (SSE: 603733) and a leading manufacturer of specialty paper for electrolytic applications. The company combines high-volume production with a focus on tight process control and product consistency. According to company disclosures, Heming operates dozens of papermaking lines across multiple bases and recently expanded dedicated capacitor paper capacity to meet growing global demand.
Heming’s portfolio includes more than two dozen model series (for example, W1, W2, XWF, and MJT2) engineered for a range of uses — from general-purpose aluminum electrolytic capacitors to automotive-grade and ultra-high-voltage designs.
Key specs & typical applications
Thickness: Available from 15 μm to 70 μm — thin grades (15–25 μm) for compact SMD capacitors; thicker grades (40–70 μm) for high-voltage or high-capacitance canisters.
Density & dielectric control: Tight density control (reported 0.35–1.00 g/cm³) for predictable dielectric performance and capacitance stability.
Breakdown voltage: High-voltage grades rated up to the company-reported maximums — suitable for applications requiring elevated dielectric strength; verify datasheet values for exact voltage and capacitance pairing.
Carbon-free solid-state grades: Manufactured to low-contaminant limits (e.g., water-soluble chlorides specification reported) to reduce corrosion risk on aluminum foil cathodes and improve long-term reliability with aggressive electrolytes.
Customization & services
Precision slitting and edge trimming — standard widths reported (500 / 580 mm) with tight tolerances (±1 mm); bespoke widths and double-layer composites available for OEMs.
Factory-direct wholesale options with flexible minimum order quantities (company-stated 1-ton MOQ) and global logistics support for export customers.
Why buyers choose Heming: The combination of high-volume production, a broad product range of capacitor paper and separator grades, and investments in process purity make Heming a strong choice when low ESR, consistent capacitance, and manufacturing uptime are priorities. Top recommended series: XWF and MJT2 for automotive-grade smoothing and high-reliability applications (confirm with supplier datasheets).
Buyer checklist & next steps: Request datasheets and sample rolls to verify thickness, capacitance behavior, ESR/impedance curves, electrolyte compatibility with aluminum foil cathodes, and measured breakdown voltage. Ask for COA/impurity analysis (e.g., chloride content), slitting tolerances, and lead time estimates to compare total delivered cost and time-to-production.
For procurement teams prioritizing performance and scale — especially for aluminum electrolytic capacitors requiring tight dielectric properties and reliable foil contact — Heming Paper is positioned as a top supplier candidate. Contact the supplier to request samples and technical test reports before qualification.
[ Request Your Custom Electrolytic Capacitor Paper Quote from Heming Today ]
Headquarters: Lishui, Zhejiang Founded in 1940, Zhejiang KAN is a long-standing leader in China’s specialty paper sector with a strong R&D foundation in electrical and separator papers. The company is widely cited as holding one of the larger global market shares for electrolytic capacitor diaphragms and supplies a range of capacitor paper grades used across consumer electronics, industrial power supplies, and automotive applications.
Strengths
Deep manufacturing heritage and sustained investment in electrical paper R&D.
Broad product portfolio covering standard capacitor separator papers and higher-performance grades for improved capacitance stability and electrolyte compatibility.
Likely compliance with industry quality systems and certifications—buyers should request ISO/quality certificates and RoHS/REACH documentation.
Typical applications
Standard aluminum electrolytic capacitors for power supplies and filter circuits.
Higher-reliability diaphragms for automotive electronics and industrial power modules (confirm specific grade approvals with the supplier).
Note for buyers: Verify historical claims (founding year and market-share statements) with supplier literature. Request datasheets that list thickness, porosity, electrolyte wettability, and measured performance (capacitance drift, ESR under specified voltages) for the specific capacitor paper grade you plan to qualify. Also confirm MOQs and lead times for production batches to align procurement schedules.
Headquarters: Jiaxing, Zhejiang Minfeng is a century-old paper manufacturer with deep experience in specialty electrical papers. Established in 1923, the company is credited with producing China’s first domestically made capacitor paper in 1955 and, as a state-affiliated listed enterprise, emphasizes stable supply and proven manufacturing processes.
Historical significance
Long heritage in specialty paper production that supports consistent quality and process control over time.
Early developer of domestic capacitor paper formulations—useful for legacy designs and long-running production lines.
Manufacturing strengths & typical products
Focus on standard capacitor separator papers for aluminum electrolytic capacitors, with grades suited to general-purpose smoothing and power-supply applications.
Reliable production processes that favor steady batch-to-batch performance — helpful when managing capacitance stability and long-term component life.
Buyer tip: When evaluating Minfeng for procurement, request datasheets showing thickness, porosity, electrolyte wettability, and measured capacitance/ESR drift under rated voltage. Confirm whether specific grades meet required automotive or industrial approvals, and verify MOQs and lead times to align with production planning.
Headquarters: Quzhou, Zhejiang Kaifeng New Material specializes in low-voltage electrolytic capacitor paper used primarily in standard aluminum electrolytic capacitors. Their grades are noted for strong liquid absorption and chemical stability, which helps ensure good electrolyte impregnation and consistent capacitance over time.
Typical low-voltage range & specs
Typical application voltage range: low-voltage electrolytic capacitors (commonly used in power-supply and filtering circuits; buyers should confirm exact rated voltages with supplier datasheets).
Wettability & absorption: formulated for high electrolyte uptake to minimize resistance to ion flow and improve initial capacitance and ESR performance; request measured absorption/wettability values for qualification.
Recommended thicknesses: available in multiple grades—select thinner grades for compact SMD/aluminum electrolytic designs and thicker grades where higher mechanical strength or higher capacitance is required (verify exact μm ranges with the supplier).
Buyer suitability & performance notes
Best suited for smoothing, decoupling, and general-purpose power-supply capacitors where electrolyte compatibility and stable capacitance are primary concerns.
Ask for test reports showing capacitance retention, ESR over life, and chemical-resistance metrics to validate long-term performance.
Confirm MOQs, lead times, and any relevant quality certifications (ISO, RoHS) before bulk procurement.
Headquarters: Dongguan, Guangdong As one of the world’s largest paper manufacturing conglomerates, Nine Dragons’ core competency is high-volume packaging paper production. The group also operates specialty paper lines that supply capacitor tissue and separator materials, leveraging the parent company’s scale in raw-material sourcing and high-throughput production.
Best for
Large-volume orders where cost-per-roll and steady supply are primary concerns — ideal for commodity-grade capacitor paper used in consumer electronics and general-purpose aluminum electrolytic capacitors.
Buyers who prioritize predictable production schedules and broad distribution networks.
Not ideal for
Ultra-high-voltage or ultra-low ESR electrolytic capacitors that require highly specialized paper formulations and intensive R&D tuning.
Applications that demand bespoke composite separator laminates or extremely tight impurity specs without prior supplier qualification.
Practical notes
Nine Dragons’ large-scale production can reduce unit costs, but buyers should verify specific capacitor paper grades for aluminum foil compatibility, electrolyte uptake, and porosity to ensure acceptable capacitance and ESR performance.
Request datasheets and production-sample testing (impregnation, capacitance retention, ESR over time) to confirm material suitability for your capacitor design.
Headquarters: Xuchang, Henan Situated in a regional hub for electrical insulation, Xuchang Zhongcheng specializes in robust capacitor paper laminates and composite insulation papers designed for heavy electrical and motor applications. Their products prioritize mechanical strength, thermal endurance, and dielectric reliability for demanding industrial environments.
Technical differentiators
Laminate construction: Engineered multi-ply laminates that improve mechanical integrity and dielectric creepage distance for wound capacitors and motor insulation stacks.
Thermal class & aging resistance: Materials formulated to meet higher thermal class requirements and resist thermal-oxidative degradation over long service times—request thermal-class ratings and accelerated-aging data from the supplier.
Dielectric & mechanical properties: Focus on high breakdown voltage, controlled dielectric constant, and tensile/tear strength to withstand winding stresses and assembly processes.
Industrial use-cases
High-voltage power distribution capacitors, motor-start and run capacitors, and transformer insulation where long-term dielectric performance and mechanical durability are critical.
Applications requiring compatibility with impregnating oils or specialized electrolytes—confirm chemical compatibility with your chosen electrolyte or impregnation medium.
Buyer checklist & recommended tests
Request datasheets listing dielectric breakdown voltage, dielectric constant, and thickness tolerances for the specific capacitor paper or laminate section you plan to use.
Ask for mechanical test results (tensile strength, elongation, tear resistance) and thermal-class ratings (e.g., IEC/ASTM references where applicable).
Obtain sample laminates for dielectric-impregnation trials, high-pot (hipot) testing, and long-term aging to verify capacitance retention and insulation resistance under expected operating temperature and voltage.
For designers of heavy electrical equipment and power electronics, Zhongcheng’s composite insulation materials are a practical choice when dielectric strength, laminate bonding, and thermal reliability outweigh the need for ultra-thin separator grades used in consumer electrolytic capacitors.
Headquarters: Wuxi, Jiangsu Wuxi Wanfeng supplies specialized masking kraft paper and antistatic winding paper that are widely used in the production and handling of film capacitors, potential transformers, and other wound electrical components. Note: these products support winding and assembly processes rather than serving as electrolyte-impregnated separator grades for aluminum electrolytic capacitors.
Key distinctions
Winding & masking function: Papers are optimized to protect foil and film during winding, provide dimensional stability, and act as temporary or permanent interleaves during capacitor assembly.
Antistatic properties: Surface resistivity and static-dissipation characteristics are primary specs—important for preventing charge buildup that can damage dielectric films or foil during handling.
Not a substitute for separator paper: These kraft and winding papers differ from electrolyte-compatible capacitor paper (separator) in porosity, wettability, and chemical compatibility with electrolytes or impregnation oils.
What buyers should request
Surface resistivity / antistatic rating (Ω/sq), tensile strength, thickness tolerance, and porosity numbers where applicable.
Sample rolls for trial winding to verify handling performance with your foil or dielectric film and to check for linting, edge quality, and runnability in automated lines.
Documentation on chemical compatibility if papers will contact electrolyte or impregnation agents—ask for specific tests demonstrating no adverse interaction with your chosen electrolyte or foil finish.
Typical specs to compare: thickness (μm), tensile strength (N/mm), surface resistivity (Ω/sq), and elongation at break. For production planning, confirm lead times and available slit widths to match your capacitor assembly requirements.
Wuxi Wanfeng is a practical supplier when you need durable masking or antistatic winding papers to improve assembly yield and protect film/foil during capacitor production, but be sure to distinguish these materials from true electrolyte-wetted capacitor separator paper when specifying for aluminum electrolytic capacitors.
Headquarters: Xuchang, Henan Newdesen Industry manufactures electrical insulation papers and offers 100% natural wood-pulp capacitor insulation paper primarily targeted at high-voltage power distribution and utility-grade electrical equipment. These papers emphasize bulk dielectric strength and mechanical robustness for larger wound capacitors and transformer insulation rather than the ultra-thin separator grades used in small aluminum electrolytic capacitors.
Typical properties & application focus
Dielectric performance: Wood-pulp insulation papers are optimized for high breakdown voltage and insulation resistance required in power-distribution capacitors and transformer windings; request specific breakdown voltage and dielectric-constant values for the grade you plan to use.
Thermal & aging class: Materials are selected for long-term thermal endurance in power equipment; confirm temperature-class ratings and accelerated-aging test data to match your service environment.
Mechanical robustness: Higher thickness and tensile strength support winding and assembly in large-format capacitors and power transformers, helping maintain capacitance and structural integrity over time.
Buyer checks & compatibility
Verify impregnation compatibility — confirm the paper’s chemical resistance with the electrolyte or impregnation oil you plan to use, since natural pulp behaves differently from synthetic separators.
Request measured capacitance retention, dielectric absorption, and insulation resistance over time under rated voltage and temperature to assess long-term performance.
Ask for sample sections for potting/impregnation trials and high-pot/hipot testing to validate breakdown and leakage characteristics in your production process.
How it compares to synthetic separators: Natural wood-pulp insulation paper typically offers excellent mechanical strength and suitability for high-voltage, high-energy applications, but it may differ in porosity, electrolyte uptake, and capacitance behavior versus engineered synthetic capacitor paper used in aluminum electrolytic capacitors. Choose Newdesen’s products when your design prioritizes dielectric strength and mechanical durability for power-distribution equipment; for small electrolytic capacitors, verify whether a synthetic separator or treated pulp grade is more appropriate.
Headquarters: Hangzhou, Zhejiang Hangzhou Weshare operates primarily as a trading and export company that sources premium PMP capacitor paper and other specialty paper products for international buyers. They focus on quality sourcing, export logistics, and bridging overseas procurement teams with Chinese manufacturers and production capabilities.
Best for
Buyers who need a reliable sourcing partner to access a range of capacitor paper grades without negotiating directly with multiple manufacturers.
Importers who prefer consolidated export services, customs documentation, and coordinated sample shipments to speed up qualification.
What to request from Weshare
Certificates and compliance documents — COA, RoHS/REACH declarations, and any supplier ISO or quality-system certificates for the specific capacitor paper grade.
Datasheets listing thickness, porosity/wettability, electrolyte compatibility (important for aluminum electrolytic capacitor impregnation), and measured performance such as capacitance stability and ESR where available.
Sample rolls and pre-shipment inspection reports — verify slit widths, edge quality, and delivered tolerances to match your production lines.
Importing & logistics notes
Clarify shipping terms (FOB/CIF/DDP), expected lead times, and typical MOQs for export orders; trading companies often consolidate orders which can affect minimum quantities and delivery times.
Confirm packaging, palletization, and any required documentation for customs clearance to avoid delays in production schedules.
Buyer tip: Use Weshare when you need access to vetted capacitor paper suppliers or PMP grades without managing multiple vendor relationships. However, always validate source manufacturers, request COAs and sample testing for electrolyte compatibility with aluminum foil, and confirm total landed cost — including freight and inspection — before placing production orders. For direct manufacturer engagement or ultra-specialty grades, consider sourcing straight from the producer once qualified.
Headquarters: Dongguan, Guangdong Located in the tech-heavy Pearl River Delta, Dongguan Xinwu supplies premium antistatic kraft paper and specialty separator materials tailored for electronics manufacturing and capacitor assembly. Their product mix is aimed at protecting foil and dielectric films during winding and at providing separator materials compatible with automated SMD and through-hole capacitor production lines.
Intended capacitor types & use cases
Antistatic kraft papers for SMD and discrete component handling where static dissipation reduces damage to sensitive dielectric films and foil during assembly.
Specialty separator and interleaf materials for winding small to medium-sized aluminum electrolytic capacitors and other wound components used in power-supply and energy-storage circuits.
Key specs to request
Surface resistivity / volume resistivity (Ω/sq) to verify antistatic performance and ESD protection.
Slitting tolerances and slit-width options to match your foil dimensions and minimize edge defects during winding.
Thickness (μm), tensile strength, porosity where applicable, and cleanroom handling or packaging options if required for high-reliability assembly lines.
Buyer checklist & QA recommendations
Obtain sample rolls and measure surface resistivity, linting, and runnability on your winding equipment before bulk purchase.
Request documentation on compatibility with your electrolyte and aluminum foil finish—some antistatic or kraft treatments can affect impregnation or foil contact resistance.
Confirm lead times, MOQ, and available slit widths; ask for COA and any material resistance test results relevant to your energy and voltage requirements.
Xinwu is a practical partner when you need antistatic protection and well-slit separator materials for capacitor assembly in high-throughput manufacturing, but always validate electrical resistance and chemical compatibility with your foil and electrolyte to ensure reliable capacitance and long-term performance.
Conclusion Selecting the right electrolytic capacitor paper is a decisive factor for the lifetime, capacitance stability, and overall performance of your electronic assemblies. When comparing the top suppliers above, Heming Paper is highlighted for 2026 due to its reported capacity expansion, carbon-free process grades, and factory-direct production model — but legacy names like KAN and Minfeng remain strong candidates for buyers who prioritize long-term supply stability and proven production pedigree.
Buyer checklist — what to verify before qualification
Material specs: confirm thickness, porosity, and dielectric properties against your target capacitance and voltage ratings; check datasheet tables for tested breakdown voltage and dielectric constant.
Electrolyte & foil compatibility: request compatibility reports showing how the capacitor paper interacts with your chosen electrolyte and aluminum foil cathode finish to avoid corrosion or capacitance loss.
Electrical performance: obtain ESR/impedance curves, leakage current, and capacitance retention over time and temperature to validate real-world performance for your application.
Production & logistical factors: verify MOQs, lead times, slitting tolerances, and available slit widths; confirm QA documentation (COA, RoHS/REACH, and any ISO certifications).
Testing samples: always request sample rolls and run small production trials, including impregnation and hipot testing, before moving to full production to measure resistance, energy-handling, and long-term drift.
Quick “best for” summary (top 3)
Heming Paper — best for high-volume production where low ESR, tight capacitance tolerances, and modern carbon-free separator grades are required.
Zhejiang KAN — best for buyers seeking an experienced R&D-backed supplier with broad capacitor paper product lines and strong market presence.
Minfeng — best for legacy or long-running production lines that value steady batch-to-batch performance and historical manufacturing reliability.
Next steps: request datasheets and samples from shortlisted suppliers, compare measured capacitance and ESR under your expected voltage and temperature conditions, and validate electrolyte/foil compatibility. Those steps will minimize qualification time and reduce the risk of unexpected failures in production. Contact suppliers to obtain COAs, sample rolls, and lead-time estimates before placing production orders.
