From electronics to packaging: Cross-sector application examples of capacitor film slitting machines

As a precision processing equipment, the core technology of capacitor film slitting machine has been extended to electronics, new energy, medical, packaging and other industries through cross-field innovation. The following is a typical case study of its cross-domain application:

1. Electronics industry: upgrading of basic applications

• Core functions: high-precision slitting (accuracy ± 1μm) and tension control (±0.5N) ensure that the film is not damaged.

• Innovative Applications:

◦ Flexible Circuit Board (FPC): Slitting polyimide (PI) film is used in mobile phone folding screens (such as Samsung Galaxy Z series) with a slitting speed of up to 300m/min and edge burrs < 5μm.

◦ MLCC ceramic film: Slitting ceramic paste film with a thickness of 2 μm increases the yield to 99.8%.

2. New energy field: thin-film batteries and lithium battery separators

• Lithium battery separator:

◦ Slitting PE/PP separator (thickness 5-20μm), the slitting parameters are adjusted in real time by laser online detection system, so that the porosity deviation is <1%.

◦ Case: After CATL applied the slitting machine, the separator slitting efficiency was increased by 40% and the cost was reduced by 15%.

• Perovskite solar cells: Slitted PET substrate (50 μm thick) for roll-to-roll coating with a flatness of 0.1 mm/m² after slitting.

3. Medical field: precision machining of high-end consumables

• Artificial kidney dialysis membrane: slitting polysulfone hollow fiber membrane (inner diameter 200μm), using sterile environment slitting technology, pollution control < 100 level cleanliness.

• Medical breathable tape: slitting hydrocolloid film (thickness 80μm), tension fluctuation is controlled within ±0.2N to avoid material stretching and deformation.

4. Packaging industry: a breakthrough in functional films

• High barrier packaging film:

◦ Slitting aluminum-plastic composite film (thickness 12μm) is used for food vacuum packaging, and the oxygen permeability rate after slitting < 0.5cm³/m²·day.

◦ Example: Amcor uses a slitting machine to achieve odd-shaped slitting (wavy edges) to improve the sealing of the package.

• Degradable film: When slitting PLA film (thickness 15μm), the tool temperature is controlled below 30°C to avoid thermal degradation of the material.

5. Emerging fields: optics and composite materials

• Quantum dot films: slitting accuracy up to ±0.3μm for Mini LED backlight modules (e.g. Apple Pro Display XDR).

• Carbon fiber prepreg: slitting width adjustable (5-500mm), with CCD guiding system, angular deviation < 0.1°.

Technology Migration Key Points

1. Precision adaptation: The electronic grade slitting machine needs to be added to the medical field to add a clean module.

2. Material characteristics: Lithium battery separator slitting needs anti-static design, while packaging film slitting focuses on multi-knife switching efficiency.

3. Intelligent upgrade: AI visual sorting (such as removing diaphragm defects) can reduce labor costs by 30%.

Market data

• The global precision slitting machine market will reach $1.27 billion in 2023, of which new energy applications account for 35% (data source: MarketsandMarkets).

Through modular design (such as tool change, tension system), a single slitting machine can cover 80% of film processing scenarios, realizing "one machine and multiple industries" flexible production. Future trends will focus on nanoscale slitting (e.g., graphene films) and zero-waste processes.