Workshop DeBarros

8/12/2019 Workshop DeBarros

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MetaPaper - Cellulose sheets tofilter electromagnetic waves

Fabien De Barros (Phd)

Guy Eymin Petot Tourtollet (Scientific director -Printed electronic)

Paul Piette (Printing )

Cooperation with two laboratories:

IMEP: Dr Tan-Phu VuongLCIS: Dr Pierre Lemaitre-Auger


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Summary

Context, Objectives, possible use on market andcreated Value

Technology used Base of efficiency First measurements

2Gept MetaPapier

Conclusion of laboratory printing (plaster, wood,glue, wallpaper)

Industrial printing

Conclusion for industrial printing Demonstrator Conclusions


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Context

Surrounded by RF:

May have a detrimental effect for health, orsimply on quietness

More and more alarming reports People are wishing more protection

MetaPaper - Cellulose sheets to filter

electromagnetic waves

3Gept MetaPapier

Security of data (companies or home networkprotection for wifi)

wireless network efficiency (better sharing of

wireless channels..)


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Scientific publications on health and waves

Report INTERPHONE in 2005 for OMS :Chance to get a brain cancer increases of 40% for mobile

phone users (30minutes by day during ten years) BIOINITIATIVEREPORT in 2007 validated by EEA

(European environmental agency) and by the

4Gept MetaPapier

Effects on health of Wifi, mobile phone, UMTS, DECT, etc.ALARMING REPORT OF 600 PAGES

Some justice judgments which consider that healthproblem can be due to electromagnetic waves

2011 : Classification by OMS of mobile phone assubstance that can cause cancer


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To design, manufacture and test wallpaper to filterselectively electromagnetic waves

We do not want a Faraday cage and relatedinstallation problems!

Our goal

5Gept MetaPapier

0.9GHz 1.8GHz 2.4GHz 5.4GHz

Filter that show perfect attenuation infunction of frequency

or


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Markets

HEALTH For reduction of exposure to electromagnetic waves

DATA SECURITY To offer the possibility for some companies or for public to improve the

security of their data in case of the use of Wifi,

INCREASE WIRELESS NETWORK USES

6Gept MetaPapier

,

not with a degraded one, their Wifi communications

TO OFFER LOW COST MATERIAL TO CREATE QUIET SPACE cinema, hospital, theater, etc.NB: to stop a technology, MetaPaper might be used by CEM professional

company in addition to other device like filters

Wallpaper applications: France only uses about 60 million rolls of wallpaper/year (20 million produced) Estimation of the market share for the anti-wifi-gsm wallpaper : to be about 1%

10/m => 30 M/ year only for France


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Frequency Selective Surface

Whats Frequency SelectiveSurface (FSS)?

Utility : Spatial and frequency filteringMain interest: 2d structures

8


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Bench for measurements in anechoid chamber

9Gept MetaPapier

Implication of twolaboratories: IMEP and LCIS


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CTPs Structure ETRIs Structure

Confirmation of simulated results by measuring

sion

10

Transm

iMeasurements

2,45 5,9 GHZ

Simulations

2,45 GHZ


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Industrial protection

This structure is patented (CTP): N10/53217SURFACE ADAPTE FILTRER UNE PLURALIT DEBANDES DE FRQUENCES

11Gept MetaPapier

PCT extension on going : August 2011 => February 2013 After February 2013 : need to choose specific country


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Laboratory Printing

Semi industrial pilot (developed by CTP) :For flexographic printing productionsheet to sheet

For optimization of printing parametersbefore industrial printing: Size of anilox Pressure applied

13Gept MetaPapier

ry ng con ons

Printed wallpaper samples : Strips obtained on 30cm10cm wallpaper

Possibility to assemble strips Wallpaper used is coated on the printedside and is an industrial reference


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Conclusion on laboratory printing

MetaPaper is printable on industrial paper and has thesame efficiency than the predicted one

No problem with use of sub layer on plasterboard or onwood (painting)

No problem with the use of glue

14Gept MetaPapier

No problem with the use of laminated wallpaper (Tookinto account in the design) Attenuation of 20dB can be easily reached (hundred

factor : 99% of attenuation)

Repartition of ink on the printed pattern => possibility todo better (optimization), so a better efficiency of filtering


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Industrial printing

Optimized industrial printing :

Speed : near 10m/minCompromise size of anilox/pressure appliedPrinting presses from a food packaging printer

15Gept MetaPapier


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Industrial trial with 13CC anilox

Comparison between laboratory and industrial

trials

Laboratory printing conditions

(dB)

16Gept MetaPapier

Frequency (Hz)

T

ransmissio

n


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Conclusion for industrial printing

With optimized anilox, industrial trials show niceperformances. Good new: two times less ink than inlaboratory conditions provides better performances!

Possibility to increase performance by increasing quantity ofink without creating interconnections

17Gept MetaPapier

Possibility to reduce production cost by decreasing the volumeof ink used for the same performances


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Printing quality results Halo effect

Adapted Optical interferometrymeasurement developed by CTP :

Developed for roughnessmeasurements of paper =>ink diffused inside the papercant be seen

On first laboratorysamples (size ofanilox = 25cm3/m =>

18Gept MetaPapier

damageable haloeffect :Desired printed regionwidth = 100m insteadof the bigger desiredvalueInk thickness in printedregion = 1m instead of4m in halo

A-Acut


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Printing quality results optimized printing

After optimization (Higher pressuresmaller anilox) : no halo effect On the industrial

optimized printing:

Printed line width =desired widthWidth of halo regions

19Gept MetaPapier

=

4m of ink depositedin the desired line(without the invisiblepart of ink diffused in

paper)No more ink in haloregions

A-A

cut


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Demonstrator

20Gept MetaPapier

30dB


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Technical conclusions

We have designed a printed wallpaper that attenuateselectromagnetic waves of 20-25dB (more than 99% ofwaves arriving on MetaPaper)

Applicable on plaster or woodWith an kind of lue

21Gept MetaPapier

Must be covered with any kind of wallpaper If two layers => 2* 20dB= 40dB (spaced by 6mm Plasterboard)

Industrial trials show

A possibility to reduce cost (two times less ink)A possibility to increase performance (Up to 30dB : 99.9% ?) Close to a final optimized industrial production


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Environmental and societal conclusion

Integration into our environment of new means ofprotection against electromagnetic waves, low cost,easy to implement and with a green connotation iemarkets :

Different kind of existent markets (health, security of data,

22Gept MetaPapier

efficiency of personal network)&

Possibility to develop new ones (help to completely stop aservice like mobile phone for cinema or hospital)

&

Possibility to develop a non selective paper if its interestingfor market

Documents

Workshop DeBarros