Liquid Filtration

Nanofront Liquid Filter Cartridges

“It’s the game changer.
Our Ultra Fine Fiber revolutionizes how filtration works”

Innovative Liquid Filter Cartridges composed of Ultra Fine fiber “Nanofront”

By transforming ultra-fine fibers with diameters of 400 nanometers and 700 nanometers into extremely thin sheets through the Paper Making Process, we achieve a delicate pore structure, enabling a highly effective dust collection capability. The uniform fiber diameter allows the realization of fine pore structures with minimal fabric weight, proving effective in the filtration of gel-like substances.

Optimized fiber diameter control ensures a precise pore size distribution,
minimizing pressure drop while maximizing filtration efficiency.

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*Nanofront fliter media

Core Material Technology

#01

Precise Short Cut Fiber

Teijin Frontier, a global leader with Polyester short cut fibers for papermaking, has successfully developed nanofibers tailored for optimal performance in liquid filter media.

#02

Paper Manufacturing

Filter media from paper manufacturing, widely used as support for RO, UF, and NF membranes, excels in customizable pore size distribution, offering a solution for diverse filtration needs.

#03

Customizable Filter Media

Our Matsuyama Research Institute possesses a wide variety of testing equipment essential for developing tailored filtration solutions across various industries.

Product Lineup

What’s our innovation?

Innovation starts from Fiber Spinning

Teijin’s proprietary “Island and Sea Splitting Fiber Technology” is utilized to apply ultra fine fiber manufacturing techniques at 200nm, 400nm, and 700nm to liquid filter cartridges.

Nanofront® (Ultra Fine Fiber)
Diameter 700mm
Nanofront Diameter700mm
Diameter 200nm
Cross Surface

Cross Section

Diameter 400nm
Cross Surface

Cross Section

Diameter 700nm
Cross Surface

Cross Section

Customizable Pore Size Achieves Ultra-Thin Sheet

Produced through wet laid papermaking, we uniformly disperse short cut ultra fine fibers (200nm, 400nm, 700nm) in water. This method creates an exceptionally thin filter with fine, sharp pores, contrasting with the meltblown process. Fibers are thermally bonded without the use of adhesives.

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* Porus is smaller
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Meltblow
Porous distribution(0.5μm)
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* Very sharp Porus distribution

How Filtration works for the dust collection

PRE FILTRATION(DEPTH TYPE)

Varied fiber diameter and blend ratio in the combination of nanofibers and microfibers enable precise pore size control, creating a high-porosity filter material.

No clogging with

  • Highly Concentrated Dust
  • Gelatinous Materials
  • High Viscosity Materia
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Depth Filtration Media

Dust dispersed evenly throughout the structure to prevent clogging
FINAL FILTRATION(PLEATED)

Utilizing uniformly sized ultra fine fibers in high concentration results in Capturing low-concentration (ppm-level) foreign particles, because

  • High filtration precision due to a sharp pore size distribution
  • High flow rates enabled by low thickness and curvature
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Surface Filtration

Gels or condensed particles accumulate on surface and cause blockage.

Our Solutions

High-concentration Slurry Filtration Filter

Filtering High-Concentration Slurry always faces challenges arising from insufficient porosity and a lack of filtration precision, leading to issues such as clogging and a reduced lifespan.

The proposed solution involves implementing a groundbreaking filter designed to effectively eliminate coarse particles ranging from several hundred nanometers to as small as several tens of nanometers in slurries.

Fluid Filtration

  • CMP Slurry
  • Polymer
  • Solvent

Experiment: Structure of Filtration Media designed for High-concentration Slurry

 
Pre Filter
Final Filter
Capture foreign materials at ppm level
Testing Condition
  • Material: Silica, Filter Size: 47mmφ
  • Pressure: Decompression 0.072Mpa
  • Test Drive: Liquid particle counter
Capture 0.45µm particle Capture 0.20µm particle
PET 0.45µm 97%
PET 0.30µm 97% 50%
PVDF Membran 0.22µm 97% 60%
Conventional 0.45µm 97% 10%
Conventional 0.20µm 97% 15%

Experiment: The removal performance of coarse particles with a size of 0.45 µm in a 17nm particle slurry

Testing Condition
  • Filtration liquid: Particle size 17nm SiO2 40% + Particle size 450nm SiO2 0.01%
  • Collection efficiency measurement: Malvern Zeta sizer Nano particle size distribution
  • Dispersing medium: Water
  • Sample size: 47mmφ, Flow rate: 44mL/min
Lifetime chart of fine particle 450nm coarse slurry
Lasts double the lifespan of the membrane
Light scattering PVDF Membrane 0.22μm
The peak on the coarse particle side disappears after filtration
Light scattering Nanofront 0.45μm
The peak on the coarse particle side disappears after filtration

Fine Chemical

Filter designed for the removal of undissolved particles and gelatinous impurities generated during the manufacturing of chemical substances.

Water-based emulsions

  • Binder for batteries
  • Adhesives
  • Color filter ink

By stacking filter media with a gradual pore size/pore space gradient, achieving high collection efficiency and long lifespan is possible. Additionally, it results in low-pressure loss during filtration, preventing the push-out.

Superiority in the performance of gel/particle filtration in filters

a group of beakers with liquid in them

A smooth transition in pore size or gaps greatly improves the effectiveness of filtering gel-like substances and tiny particles.

Experiment: Size distribution of particles in the test solution

Time to Reach Long Lifespan (100Kpa)
AC Fine Dust Collection Efficiency(%)
Gelatinous Material Collection Efficiency(%)
High collection efficiency from initial use
Testing Condition
  • Untreated Water: Gel Solution / Methylcellulose 500ppm, Powder / AC Fine Dust 100ppm
  • Dispersing Medium: Water
  • Cartridge Size: 250mm
  • Flow Rate: 10L/min
  • Test Drive: Liquid Particle Counter

Metal Adsorption Filtration

Suitable for filtering resist liquids and etching solutions used in the semiconductor processing lithography.

The challenges of metal adsorption filtration include the removal of particles, bubbles, and metallic contaminants that can cause surface defects in resist patterns. The elimination of metal contamination is crucial to prevent electrical performance issues, requiring reduction to ppb levels. High metal ion adsorption performance is essential for effective filtration.

Zeta potential at the surface

Through our specialized cleaning techniques, a high-purity nylon filter media with extremely low levels of metallic and organic impurities can be achieved. The surface of the nylon filter media contains a minimal amount of adsorbed water, exhibiting a significant negative charge (zeta potential). This strong negative charge is expected to enhance the adsorption effect for positively charged species such as metal ions and proteins).

Experiment: High-purity nylon filter media with extremely low levels of metals and organic contaminants achieved through specialized cleaning techniques

Testing Condition
  • Tested Filter Cartridge
  • Filtration Efficiency: Nylon 6 0.5μ(TNN005)
  • Material: Polyethylene
Metal Leaching Amount
  • Extraction Condition: Soaking one 10-inch cartridge filter in 1.8 liters of ultrapure water
  • Measurement method: After immersing for 24 hours at room temperature, collect ultrapure water for ICP analysis
Metal leaching from the 10-inch cartridge filter
Amount of IPA (Isopropyl Alcohol) leachate (organic compounds)
  • Extraction Condition: Soaking a 500 cm2 filter sheet in 300 mL of isopropyl alcohol at 20°C for 24 hours
  • Measurement method: Measure the weight of the residue after evaporating the solvent
Sample Metal Leaching Amount (mg/m2)
Low-extractable nylon cartridge filter 76
Flow Characteristics
  • Liquid: Purified Water
  • Length: 250mm
Filtration Efficiency
  • Liquid: Purified Water
  • Length: 250mm
  • Flow Rate: 10L/min
  • Particle: ACFTD

High-Viscosity Paste filtration


A high-precision filter (<0.45µm) suitable for filtering high-viscosity pastes such as coating agents. Our filter cartridges are ideal due to their uniform fiber diameter, allowing for low basis weight and thin filter media, resulting in low pressure loss.

High-Viscosity Paste

  • Conductive Paste
  • Insulating Paste
  • Paint
  • Ink

Experiment: The Superior Flow Characteristics of Viscous Liquids

Testing Condition
  • Fluid: CMC (100mPa&dots;s)
  • Sample Size: 47mmφ
Comparison of Flow Characteristics
Comparison with Company R: Low Pressure Loss, High Flow Rate

Target Industries


Electronics

Fluid Filtration (Polymer, Solvent, CMP Slurry)

Optical film/ Panel (Anti-reflection, polarizing protective film, Functional Film) Polymer Formulation, Coating, Cleansing

HDD

Glass substrate, Disc media polishing, Cleansing, Driving parts Bearing motors, Grinding, Polishing

LCD

Substrate Polishing, Cleansing, Color Filter / TFT Resist coating development and peeling

MLCC

Internal electrode, dielectric Raw Materials grading, Solvent Resin Paste Filtration


Automotive

Body, Electronic Components

Bearing grinding, Cleansing, Painting, Washing, Coating


Food/Beverage/Pharmaceutical/Cosmetics

Liquid

Amino acid, Isomerized Sugar, Beer, Alcohol, Soft Drink, Lotion Milky lotion Shampoo, Conditioner, dental paste


Chemical

High Viscosity Paste/ Slurry

Paint, Ink, Photosensitive emulsion, Surface modifier, Paste,Slurry, Solvent