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Electrolytic Capacitor Paper Rolls — Manufacturer & Wholesale Supplier

Factory-direct electrolytic capacitor paper engineered for aluminum electrolytic capacitors. 28+ model series spanning general-purpose to automotive-grade, SMD, wide-temperature, and ultra-high-voltage applications. Custom OEM, precision slitting, and bulk wholesale supply from Heming — a subsidiary of Xianhe Corp., one of China's largest specialty paper manufacturers.

Thickness: 15–70 μm

Density: 0.35–1.00 g/cm³

Breakdown Voltage: up to 1795V

Low ESR

28+ Model Series

Custom Slitting

OEM Available

1-Ton MOQ

Product Specifications at a Glance

Thickness Range

15 μm to 70 μm, with tight tolerance of ±1.2 μm to ±5.6 μm depending on gauge. Ultra-thin 15–20 μm options for compact, high-density capacitor designs.

Density (Tightness)

0.35 to 1.00 g/cm³, precision-controlled per model. Lower densities for low-impedance applications; higher densities for enhanced breakdown voltage and mechanical compression resistance.

Breakdown Voltage

360V to 1,795V across product series. XWF and XMF composite series achieve the highest ratings for high-voltage capacitor applications in renewable energy and power electronics.

ESR Performance

Ultra-low Equivalent Series Resistance across all series. MJ2 and MJT2 series optimized for minimum loss at high frequencies — ideal for SMD and high-ripple-current applications.

Roll Dimensions

Standard widths: 500mm, 580mm. Roll diameter: 260–320mm. Core OD: 96.2mm. Custom slitting to any width with ±1mm tolerance for electrolytic capacitor paper rolls in bulk.

Chemical Purity

Water-soluble chloride ≤2.0 mg/kg. Conductivity ≤1.1 ms/m. pH 6.0–8.0. Iron particles ≤5 per 1,800 cm². Sulfate ions ≤15 mg/kg. Carbon-free manufacturing for solid capacitor grades.

Factory & Production Capacity

As a subsidiary of Xianhe Corp. — a publicly listed (SSE: 603733) specialty paper leader — our electrolytic capacitor paper factory operates 59 papermaking lines across 5 manufacturing bases. Four capacitor-paper-specific production lines were added in 2024 to meet surging demand from renewable energy, 5G telecom, and EV sectors.

5 Manufacturing Bases

Xianhe Corp. operates across 5 production sites in China. The capacitor paper division is centered at the Changshan Zefeng base. Total footprint exceeds 500,000 m².

59 Papermaking Lines

Including 4 dedicated electrolytic capacitor paper lines added in 2024 to meet the surge in demand from renewable energy, 5G, and EV sectors.

7,400+ Employees

169 R&D specialists dedicated to product innovation. 80+ engineers with 8+ years of capacitor paper experience. 24/7 production operation.

2M+ Tons Annual Output

Group-wide annual production capacity exceeds 2 million tons across all specialty paper categories, ensuring stable supply for wholesale electrolytic capacitor paper buyers.

What Is Electrolytic Capacitor Paper?

Also known as capacitor separator paper, capacitor tissue paper, or aluminum electrolytic capacitor paper — this is the most technically demanding specialty paper in the industry.

Electrolytic capacitor paper serves as the separator material between anode and cathode foils inside aluminum electrolytic capacitors. It holds the liquid electrolyte, provides electrical insulation, and must maintain extremely low ionic contamination levels to ensure long-term capacitor reliability. Often called "the King of Paper" in the paper industry, it demands the highest standards of fiber purity, uniform formation, density control, and chemical cleanliness.

As a leading electrolytic capacitor paper manufacturer and wholesale electrolytic capacitor paper supplier, Heming (backed by Xianhe Corp.'s 59 production lines and 7,400+ employees) produces capacitor-grade paper that competes with and replaces imported alternatives from Japan and Europe. Our products are trusted by aluminum electrolytic capacitor factories across Guangdong, Jiangsu, Hunan, and over 30 export countries.

Function in Capacitors

Acts as a dielectric separator that absorbs and retains electrolyte while preventing direct contact between anode and cathode foils. Its porosity, density, and purity directly determine capacitor ESR, ripple current handling, and service life.

Why It's Called "King of Paper"

Manufacturing requires ultra-pure cellulose fibers, precision formation on specialized paper machines, deionized water processing, and cleanroom-grade handling. Even microscopic metallic particles or chloride ions can cause capacitor failure.

Electrolytic Capacitor Paper Series & Models

28+ model series covering every aluminum electrolytic capacitor application — from consumer electronics to automotive, 5G infrastructure, and renewable energy.

W1 Series

0.65–1.00 g/cm³ | 15–50 μm

General-purpose, cost-effective. Used in standard aluminum electrolytic capacitors for consumer electronics and LED drivers.

W2 Series

0.70–0.90 g/cm³ | 30–70 μm

Double-layer structure for improved reliability. Suitable for medium-voltage capacitors in industrial power supplies.

WS2 Series

0.80–0.85 g/cm³ | 40–70 μm

Higher compression resistance with balanced liquid absorption. For SMPS and frequency converter capacitors.

EX Series

0.75–0.90 g/cm³ | 20–30 μm

Enhanced W1 with 150–200V higher breakdown voltage. For applications needing improved safety margin without major cost increase.

XW Series

0.85 g/cm³ | 30–60 μm

High-compression electrolytic capacitor paper. Optimized for high-ripple-current and high-frequency applications.

MJ2 Series

0.35–0.50 g/cm³ | 40–50 μm

Ultra-low density for extremely low ESR electrolytic capacitor paper. Maximum liquid absorption. Ideal for high-frequency low-impedance capacitors.

MJT2 Series

0.35–0.50 g/cm³ | 40–50 μm

SMD capacitor paper — specifically designed for surface-mount aluminum electrolytic capacitors. Low-loss non-polar fibers. Comparable to NKK MEG/MEX series.

XH Series

0.45–0.50 g/cm³ | 40–45 μm

Solid capacitor paper — carbon-free manufacturing. Eliminates carbonization process, reduces production cost and energy for solid aluminum electrolytic capacitor manufacturers.

XHG Series

0.60–0.65 g/cm³ | 60–65 μm

High-voltage capacitor paper for 100–200V rated capacitors. Optimized XH variant with enhanced performance for higher working voltages.

MTX Series

0.60–0.65 g/cm³ | 30–60 μm

Wide-temperature capacitor paper (-55°C to high temp). For 5G outdoor adapters and telecom infrastructure. No crystallization at extreme low temperatures.

XHF Series

0.40 g/cm³ | 40 μm

Automotive-grade capacitor paper. High-temperature resistant, low mass loss. For SMD-type solid capacitors in automotive electronics.

XMF / XWF Series

0.65–1.00 g/cm³ | 30–60 μm

Machine-composite multi-layer construction. Ultra-high breakdown voltage up to 1,795V. Replaces imported EDH/EDHM/EDSH grades. For GaN power, renewable energy inverters.

PD2 / WD2 / WCD2

0.58–0.80 g/cm³ | 40–60 μm

Low to very-low density series. Optimized for low-impedance applications. WD2 and WCD2 offer progressively lower density for specialized ESR requirements.

WM2 Series

0.70 g/cm³ | 40–70 μm

Multi-purpose series with good all-around performance. Thicker gauges (60–70 μm) commonly used to reduce short-circuit defect rates in high-reliability capacitors.

TDS Series

0.75 g/cm³ | 40 μm

High breakdown, low loss. Very low ESR combined with 700V+ breakdown voltage for demanding power electronic applications.

WHKD75 Series

0.75 g/cm³ | 30–50 μm

Cylinder-machine composite. High-compression long-wire layer + ultra-low-loss cylinder layer. Replaces PXWDH grades for balanced ESR/voltage performance.

Additional series available: KS2, WJ2, WB2, SM2, SD2, SDT2, SMD2, S2, XHT, MJTX, SM, S. Contact our technical team for series not listed above or for custom formulations.

Technical Specifications — Representative Models

Every batch undergoes 4-stage quality inspection: raw material verification, in-process coating/density monitoring, finished roll physical testing, and chemical purity analysis.

Series	Density (g/cm³)	Thickness (μm)	Tensile MD (kN/m)	ESR 23°C EG (Ω/kHz)	BDV (V)	Application
W1	0.65–1.00	15–50	1.20–2.50	1.10–2.59	360–620	General-purpose
W2	0.70–0.90	30–70	1.80–3.80	1.70–3.40	470–750	Industrial PSUs
WS2	0.80–0.85	40–70	2.00–3.50	2.10–3.10	580–820	SMPS, Inverters
EX	0.75–0.90	20–30	1.20–2.00	1.31–2.14	500–800	Enhanced safety margin
XW	0.85	30–60	1.90–3.50	2.40–3.30	620–770	High-compression, high-ripple
MJ2	0.35–0.50	40–50	0.50–1.60	0.36–0.61	—	Low-impedance, high-freq
XH / XHT	0.35–0.50	40–60	0.40–0.80	1.40–1.55	—	Solid capacitor (carbon-free)
XHG	0.60–0.65	60–65	0.10–1.30	0.62–1.70	—	High-voltage solid
MTX	0.60–0.65	30–60	0.80–1.50	0.52–0.70	420–500	Wide-temp, 5G, -55°C
XHF	0.40	40	0.50	0.45	—	Automotive SMD
TDS	0.75	40	2.50	1.18	700	High-V, low-loss
XMF65	0.65	40–50	—	1.09–1.12	620–773	Composite, replaces EDL
XWF75–100	0.75–1.00	30–60	—	2.30–3.50	1000–1795	Ultra-high-V, GaN power

Full specifications for all 28+ series and all thickness/density combinations available upon request. Contact our technical team with your specific ESR, breakdown voltage, and dimensional requirements.

How to Select Electrolytic Capacitor Paper

Choosing the right capacitor separator paper directly impacts your capacitor's impedance, reliability, and size.

To Lower Impedance (ESR)

Select paper made with low-impedance fibers (S, M, D, J fiber types). Choose thinner gauges (e.g., S2 40μm, SM2 40μm). Select lower-density grades (S2, SM, MJ, WJ series).

To Reduce Short-Circuit Rate

Choose higher-density papers (W1-80, W1-85, W1-90, WS2-80, W2-85, WD2-70, KS2-80). Use thicker gauges (WM2 60–70μm). Consider double-layer or two-sheet configurations.

To Reduce Capacitor Size

Select ultra-thin grades: W1-80-20, W1-85-20, W1-90-20, S2-70-30, W100-15, W1-75-20, XWF100-30. Thin-profile paper enables smaller case sizes without sacrificing performance.

For Wide-Temperature (-55°C to +105°C)

MTX series is purpose-built for extreme temperature ranges with no electrolyte crystallization at -55°C. XHF series for high-temperature automotive SMD applications.

capacitor-paper-packaging-specifications

For High Breakdown Voltage (>1,000V)

XWF series machine-composite paper achieves 1,000–1,795V breakdown voltage. WHKD75 composite series provides balanced ESR/voltage for mid-range requirements.

For Solid Capacitors (Carbon-Free Process)

XH series enables skip-carbonization manufacturing — no carbonization equipment investment, lower energy consumption, higher yield rates, reduced production cost.

Frequently Asked Questions About Electrolytic Capacitor Paper

What is the minimum order quantity (MOQ) for electrolytic capacitor paper rolls?

Standard MOQ is 1 metric ton for regular specifications. For OEM custom orders with specific density, thickness, or multi-layer composite configurations, MOQ is flexible and evaluated per project by our technical sales team.

What roll widths and diameters are available?

Do you provide OEM capacitor paper development?

How do your capacitor papers compare with Nippon Kodoshi (NKK) products?

What is the lead time for bulk orders?

Can I get free samples for testing?

What certifications do your capacitor papers hold?

Do you ship to our country? What trade terms?

Request Wholesale Pricing & Free Samples

Tell us your target ESR, breakdown voltage, thickness, and roll dimensions. Our technical team will recommend the optimal electrolytic capacitor paper series and provide a factory-direct quotation within 12 hours.

Request Free Samples