Decoding High Young’s Modulus, TD Flatness, and Controlled Roughness for Dry Film Photoresist and Metallic Yarn
Product Overview
In the microscopic world of high-tech manufacturing, perfection is measured in microns. When producing printed circuit boards or precision textiles, a single wrinkle or dimensional flaw can ruin the entire batch. Lumirror F71 PET Film is the industry’s ultimate precision substrate. Unlike standard transparent films, F71 is engineered with a unique contradiction: it is highly transparent and glossy, yet features a slight surface roughness. This specialized design provides both optical clarity and flawless handling, making it indispensable for dry film photoresist and metallic yarn applications.
The Core Specs: Mastering Physical Stability
What makes Lumirror F71 a top-tier engineering material? The data sheet highlights a highly specialized performance profile:
- High Young’s Modulus & TD Flatness: For dry film photoresist, the film must remain incredibly flat during lamination. F71 is engineered to maintain outstanding dimensional stability and flatness in the Transverse Direction (TD), ensuring zero distortion during circuit printing.
- Perfect Balance of Roughness and Clarity: While it boasts excellent transparency and gloss, its “slight roughness” provides the necessary friction to prevent blocking and ensure smooth feeding on automated high-speed machinery.
- Extreme Tensile Strength: With a tensile strength reaching up to 300 MPa MD, this ultra-thin film (12μm and 19μm) can withstand immense mechanical tension without snapping.
Key Applications Across Industries
The unique properties of Lumirror F71 make it the go-to solution for highly specialized fields:
- Dry Film Photoresist (19μm): Serving as the protective cover sheet that must perfectly release and maintain absolute flatness during PCB manufacturing.
- Metallic Yarn (12μm): Providing a robust, thin base for the deposition of metallic layers used in high-end textiles and anti-counterfeiting threads.
- Flexible Electronics: Where precise handling and optical clarity are mandatory.
Sourcing a Reliable Alternative
While Lumirror F71 PET Film is a legendary standard in the PCB and textile industries, supply chain managers often seek a Lumirror F71 Alternative to optimize costs. A successful replacement requires a manufacturer that can precisely replicate the high Young’s modulus and TD flatness, ensuring your automated lamination lines run without a hitch.
Technical Characteristics
The following values represent the typical capabilities of our equivalent High-Precision PET Film range:
- Material: Biaxially Oriented Polyethylene Terephthalate
- Thickness Range: 12 μm to 19 μm
- Tensile Strength: MD 285 to 300 MPa / TD 240 to 265 MPa
- Thermal Shrinkage at 150°C, 30min: MD 2.6% to 4.0% / TD 0.0% to 0.4%
- Haze: 1.5% to 1.8%
- Surface: Glossy and transparent with slight roughness
- Certifications: RoHS, REACH compliant
Why Choose Jinlu Film as Your Supplier
Jinlu Film is a leading manufacturer of high-precision PET film. We offer a direct factory substitute for the Lumirror F71 series, providing the same high Young’s modulus and controlled roughness required for critical dry film photoresist and metallic yarn production. Whether you need ultra-thin gauges or customized surface treatments, we offer factory-direct pricing, custom slitting, and reliable global shipping.
Contact us today for a factory quote, technical data, or a sample of High-Precision PET Film.
