Capacitor foil is the core material for manufacturing aluminum electrolytic capacitors. It is divided into anode foil and cathode foil, and is made of high-purity aluminum of 99.99% or more through precision processes such as rolling, annealing, etching, and chemical formation. It directly determines the capacitance, voltage rating, and lifespan of the capacitor.

Depending on its function, it is classified into:

• Anode Foil

Etched and formed to create a high surface area, directly determining the capacitance.

• Cathode Foil

Primarily serves as a conductive layer without forming treatment.

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Description

Yutwin New Materials is committed to providing high-quality aluminum foil solutions to the global market, combining durability, safety, and cost-effectiveness. Our product range covers everything from standard household aluminum foil to industrial jumbo rolls and specialty aluminum foils. In addition to standard specifications, we also offer customized solutions based on customers’ technical requirements, including tailored thickness, width, surface treatment, and packaging options.

Application of Aluminum Foil in Capacitors

Capacitor Foil Specifications

Item	Specification
Alloy	1060 / 1070 / 1100
Aluminum Purity	≥99.6% (up to 99.99%)
Temper	O / H18
Thickness	0.02 mm – 0.12 mm
Width	100 mm – 1000 mm (customizable)
Tensile Strength	40 – 120 MPa
Elongation	≥2%
Surface Finish	Double bright / Single matte / Etched
Electrical Conductivity	≥60% IACS
Pinhole Control	Strictly controlled for electronic-grade applications

Applications

• Aluminum Electrolytic Capacitors

Used for power filtering and voltage stabilization in various electronic circuits.

• Consumer Electronics

Widely applied in TVs, computers, power adapters, smartphones, and chargers.

• Industrial Equipment

Suitable for inverters, frequency converters, and UPS power systems.

• New Energy Sector

Used in electric vehicles (EVs), photovoltaic inverters, and wind power systems.

• Telecommunications

Applied in base station power supplies and communication equipment modules.

☑ End-to-End Production from Aluminum Ingots

Our production facilities include a smelter, hot rolling mill, cold rolling mill, and annealing workshop, ensuring consistent and reliable quality at every stage.

☑ Extensive Aluminum Product Range

We produce aluminum coils, strips, and sheets in various specifications to meet diverse technical and dimensional requirements, flexibly catering to the needs of different industries.

☑ Comprehensive Reprocessing Technology

In addition, we offer comprehensive reprocessing technologies to improve product surface performance. We provide customized solutions for applications such as packaging, construction, transportation, and industrial manufacturing.

☑ Comprehensive Quality Supervision System

A complete quality supervision system is established across the entire production process. A digital platform enables real-time monitoring and full data traceability, from raw material inspection to finished product delivery. Systematic testing is carried out on physical properties, chemical properties, and optical properties, ensuring consistent performance in strength, stability, composition accuracy, and surface quality, and providing reliable quality assurance.

☑ Professional Packaging and Delivery

To ensure products arrive undamaged, we offer customized packaging solutions based on product type and customer needs. Products are securely packaged using protective film, waterproof packaging, and reinforced pallets, meeting international shipping standards.