GC38-Spec High-Purity Carbon-Based Barrier Membrane for Polyimide: Product Introduction
The GC38-Spec High-Purity Carbon-Based Barrier Membrane for Polyimide is a high-performance functional material specifically engineered to combine the excellent mechanical stability of polyimide substrates with the superior barrier properties of high-purity carbon. As a specialized membrane solution, it is designed to address critical protection needs in advanced industrial and electronic applications, where reliability, durability, and precision barrier performance are non-negotiable.
1. Core Product Characteristics
1.1 Ultra-High Carbon Purity & Uniform Coating
The membrane features a carbon-based barrier layer with industry-leading purity (≥99.9% carbon content, compliant with GC38 specification standards), ensuring minimal impurities that could compromise barrier efficiency or interact with sensitive components. The carbon layer is deposited uniformly across the polyimide surface—with a thickness tolerance of ±2%—eliminating weak points (e.g., pinholes, uneven coverage) that often lead to performance degradation in conventional barrier films.
1.2 Exceptional Barrier Performance
Targeting the permeation of moisture (H₂O) and oxygen (O₂)—two primary causes of material degradation in high-value applications—the GC38-spec membrane achieves moisture vapor transmission rate (MVTR) < 1×10⁻⁶ g/(m²·day) and oxygen transmission rate (OTR) < 0.001 cm³/(m²·day·atm). This level of protection effectively isolates polyimide-based components from environmental humidity and oxidative damage, even in harsh operating conditions.
1.3 Compatibility with Polyimide Substrates
The carbon-based barrier layer is designed for strong adhesion to polyimide (PI) materials, with a peel strength of >5 N/cm that resists delamination during processing (e.g., cutting, bending) or long-term use. Additionally, the membrane preserves the inherent advantages of polyimide—including high thermal resistance (continuous use temperature up to 260°C), excellent chemical stability (resistant to acids, alkalis, and organic solvents), and low dielectric constant—making it suitable for temperature- and chemical-sensitive environments.
1.4 Dimensional Stability & Flexibility
With a coefficient of thermal expansion (CTE) matched to polyimide (15–20 ppm/°C), the GC38-spec membrane avoids warping or cracking when exposed to temperature fluctuations. It also maintains structural integrity under repeated bending (≥10,000 cycles at a bending radius of 1 mm), making it ideal for flexible electronic devices that require dynamic shape adjustment.
2. Key Application Fields
2.1 Flexible Electronics
As a critical protective layer for flexible OLED displays, flexible solar panels, and wearable electronic sensors, the GC38-spec membrane prevents moisture and oxygen from penetrating into delicate components (e.g., OLED emitters, thin-film semiconductors). This extends the lifespan of devices—such as foldable smartphones or flexible health trackers—from 2–3 years to over 5 years in typical use.
2.2 Aerospace & Defense
In aerospace applications (e.g., polyimide-based wiring harnesses, satellite components), the membrane’s high thermal resistance and barrier performance shield materials from extreme temperature changes (-60°C to 300°C) and low-earth-orbit (LEO) environmental factors (e.g., atomic oxygen, micro-meteoroids). It also meets aerospace-grade flame-retardant standards (UL94 V-0), ensuring compliance with safety regulations.
2.3 Energy Storage
For high-performance lithium-ion batteries (LIBs) and solid-state batteries that use polyimide as a separator or packaging material, the GC38-spec membrane acts as a secondary barrier to prevent electrolyte leakage and moisture ingress. This enhances battery safety (reducing the risk of thermal runaway) and improves cycle life (extending charge-discharge cycles by >30% compared to uncoated polyimide separators).
2.4 Microelectronics & Semiconductors
In semiconductor manufacturing, the membrane is used to protect polyimide-based photoresists, interlayer dielectrics, and microelectromechanical systems (MEMS) from moisture-induced degradation during wafer processing or packaging. Its low dielectric constant (εᵣ < 3.0) also avoids interference with signal transmission in high-frequency microchips.
3. Compliance & Customization
The GC38-spec membrane fully adheres to international material standards (e.g., ISO 15106-3 for barrier film testing, ASTM D1003 for optical clarity). It is available in standard roll sizes (width: 300–1500 mm, length: 100–500 m) and can be customized with additional features—such as anti-reflective coatings or conductive carbon layers—based on specific application requirements.
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