KEPPI ELECTRO STATIC FIBRE COATING

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KEPPIELECTRO STATIC FIBRE COATING
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Project targets

• Electrostatic spinning and coating in paper
  coating and functionalising preliminary study.
• Promote coating adhesion, surface quality, and
  printability.
• We study 25 product ideas in 2004.

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Description

• Very low amount of material distributed evenly
  enables effective use of functional materials.
• Basic studies.

More...
www.kcl.fi/netcoat www.tut.fi/teva
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Competitor analysis

• Competitors
• Functional coating materials
• Reactive methods
• Our advantages
• Sensitive materials
• Nano composites
• Our limitations
• Production speed (feature)
• Solvents (some cases)

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Competiton analysis, cont.

• Competiton technology problems
• Typically higer material consumpition
• Below one micron fillers are problematic
• More additives required
• Coating material compositions complicated
• Reactive methods time debending

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Properties of the coatings
Buchko, C.J. et al., Processing and
microstructural characterization of porous
biocompatible protein polymer thin films,
Polymer, 40(1999), 1999, s. 7397-7407
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Technology

• Electrostatic spinning
• especially low weight coating 0,005...0,1 g/m2
• sizing below micron 50...400 nm
• net work structure of 25...500 nm
• composites 5...20 nm particles and 100..400 nm
  structures
• We prefer
• water- and biosolvable paper chemicals
• inherently conducting and self-organizing
  polymers
• nano fillers/ pigments
• We avoid
• Environment hazardous
• Difficult to recycle

3500x
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Team/Resourceses

• Reasearch of three menyears
• Pirjo Heikkilä TUT/FMS, Marjo Pääkkö ja Teemu
  Ruotsalainen HUT/NMC, Noora Ristolainen
  HUT/PolTech, prof. A.Harlin, prof. O.Ikkala, ja
  prof. J.Seppälä
• e-Sp2, ATRP, SEM, AFM, SAXS
• TTY/ Tampere, TKK/ Espoo
• Ahlstrom, M-Real, Stora Enso, UPM, Mirka,
  Suominen, Metso, Raisio, Panipol, ABR Innova

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Project chalanges

• Process modifications
• Improved materials
• Analytical methods

FOR MORE INFO...
ali.harlin_at_tut.fi AUTEX2004 InnoTechTex2004
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Schedule

• Main

MORE ...
One spin off . Two master thesis and dissertation
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Status

• Main achievements
• Process works with base paper chemicals
• Mono disperse particle trasfer still problem
• Polymer blends promising
• ESD coating tested and proven
• Adhesion and printability under study

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Paper chemicals

• PVA networks of 50-300 nm
• PVA blends with 50-800 nm net work
• Most polymers perform well

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nano coating

• PANi nano blend fibre coated paper
• Surface charge can be improved
• Properties can be controled

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Further

• We concentrate
• Adhesive materials
• Surface quality
• Pigmentation and finising
• Competion increases
• 2003...4 new patents on the technology
• Products for filters, special textiles, and paper
• Post mortem
• We see at least 3...5 products for further
  development