surface treatment : new corona and plasma … · !medical / pharma / cosmetc !construction /...

SURFACE TREATMENT :

NEW CORONA AND PLASMA TREATMENT SOLUTIONS

HOW TO GAIN PRODUCTIVITY

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SYSTEMES ET TECHNOLOGIES

DE TRAITEMENT DE SURFACE

Titre du document - 23/04/2012

!   Dec 2011 : creation of STTS, only French

Corona equipment manufacturer and specialist of surface treatment solutions for

more than 35 years.

!   More than 4000 sysems currently running

mainly in France and worldwide (Europe,

Japan, USA & South America, Rep. Tchèch Republic, Canada, China…)

!   Numerous partnerships with intégrators and machine manufacturers, glue, ink and

paint companies, Research centers,

laboratories, universities etc...

!   Stand alone or on-line integrated solutions

thanks to a pre-study and customs made

designs made in close relationships with our customers

FACTS : Surface energy, specifically those of plastics materials, can be too low to allow a good adhesion

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CORE COMPETENCE : SURFACE TREATMENT


Layer deposit (paint, varnish, adhesive, metal …) on a solid

support puts in presence together two layers of thin thickness

situated on the extreme surface, as well on the substrate than

than on the deposit. Their thicknesses are of few nanometers

and determine therefore a zone currently called interface.

This is the location where we find or not adhesive links.

Mechanically, the surface energy (or tension) is expressed as

a force fighting against a surface growth and related to a

length unit. The higher the surface energy of the substrate is ,

more the interfacial interactions are important and increase

the adhesion coefficients.

You can either use the old industrial denomination called

DYN/cm2 or express it in mN/m.

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Réactifs de mesure de tension de surface en flacons

Mesure d’angle de contact de goutte d’eau

Goniomètre électronique

HOW TO MESURE THE SURFACE TENSION ?

In laboratory : contact angle measurement of a water drop

During tests (Design of Experiment) or in production (on line) : normalized reactive liquids

Réactifs de mesure de tension de surface en stylos

Avant

activation

Après

activation

TARGET :

To glue but also print, paint, varnish, foam or coat on plastic materials …

In other words : make a product bond …..

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WHAT ARE WE LOOKING FOR WITH A PROCESS

OF SURFACE TREATMENT ?


On a diversity of materials and substrates

! PP, PE and all other thermoplastic polymers et tous types de polymères

Elastomeres, rubbers

! Composites matetials

! Metal, carbon materials

! Glass …. And even leather, wood …

6 Titre du document - 23/04/2012

On all simple or complex foms / profiles

! Films, labels , paper

! Flexible and rigid plates, thin or thick

! 3D parts (injected, thermoformed, extruded…)

! Profiles


In all industrial domains such as

! Automotive/Aerospace and Aeronautic

!  Packaging

! Electronics / technical parts

! Medical / Pharma / Cosmetc

! Construction / building

! Household appliances …


!   Surface Abrasion : improvement of the roughness (mechanical anchorage)

!   Chemical cleaning: chimical solution

baths

!   UV + Primers

!   Flame teatment

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WHICH ARE THE CURRENTLY USED PROCESSES ?


Main drawbacks :

! Possible Alteration of the aspect (fragiles,

translucent surfaces …)

! Creation of dust or surface pollution

! Use of chemicals not ecological

!  The use of certain chemicals is against certain

European REACH directives .

! Costs : permanent consupmtion (cost to permanently impact on part price)

! Risks of « over-treatment », deformations,

warpage (overheat)

! Not constant quality of results : constraint of

settings,

! If flame use (sometimes necessary), secured

systemss are mandatory ( insurance costs,

necessity to have a secured gaz input & exhaust ..)

!   CORONA treatment

!   Atmospherical Plasma Treatment

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OTHER METHODS CAN BE USED :

THE ELECTRICAL DISCHARGE TREATMENT

CORONA OR PLASMA


The surface bombing of polymers with particles

(ions, électrons, radicals …) coming from electro-magnetic

discharges separate the covalent carbon-hydrogen and

carbon-carbon links to mainly create free radicals.

These radicals can be saved, recombine between each

other, react with oxygen and bring the formation of

chimical polar sites and/or begin a graft reaction, in

presence of an appropriate composed gaz (other gazes

than air).

The durability of treatment (time interval between treatment

and application of the material) is directly linked to the life

time and of the becoming of the free radicals created on

the surface.


PHYSICAL AND CHIMICAL SURFACE REACTION

DURING ELECTRICAL TREATMENT

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PHYSICAL AND CHIMICAL SURFACE REACTION

DURING ELECTRICAL TREATMENT


The corona effect is an electrical discharge created in a

very high tension electrical field and through a space

where no temperature is generated.

In this environment, the electrons, ions, radicals are

grafting on the surface, among others, oxygen and nitrogen

particels present in the air.

.

The plasma discharge is an electrical arc created in a torch

in which we will have generated specific conditions

allowing the creation of a plasma environment and where

the turbulences are created with a gaz (air, othes). These

turbulences allow to create a plasma jet controlled which is

coming out of the nozzle in a very concentrated way with

effect of polar sites creations on the surface, with other

chemical properties on the surface if we use other gazes

than air.

diélectrique masse

!   Classical CORONA treatment :

- The direct CORONA treatment

- The ceramic CORONA treatment

- Blower Sparks CORONA treatment

!   CORONA TREATMENT : Innovation

- The Indirect CORONA treatment

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CONVENTIONAL AND INNOVATIVE

CORONA TREATMENT


Titre du document - 23/04/2012 14

CONVENTIONAL CORONA TREATMENT

!   Direct Treatment

! Ceramic Treatment

!   Blower Sparks Treatment

Several conventional Corona treatment are currently used : each of them

are chosen following the application and specifications of the

production process


CONVENTIONAL CORONA TREATMENT SURFACE

Direct type Corona treatment

Principle : the material to be treated goes inbetween an electrod and a counter-electrod (cylinder, mandrel or mask)

!   films, sheets,

!   parts on mandrel (-6mm thickness)

!   parts on metalic mask

Applications :

Printing, food films gluing, lables, electical wires, syringes,

Caps, Tubes ….


Ceramic type Corona treatment

Principle : the material, all or partly conductive, is treated by a ceramic electrod

!   Treatment on metal support

!   Treatment of partly or totally conductive

!   Treatment of rubber, material containing carbon

Applications :

Carbon profiles for automotive, metal panels with epoxy coating, fine

Polymer parts on metal lines, metal films for decoration etc…



Blower Sparks type Corona treatment

Principle : Low frequency system applied on two electrod in one treatment head in which the discharge is blown on the surface.

!   Treatment of flat or hollow parts !   Treatment of parts with light or complex relief !   Treatment of profiles Applications : Ink jet printing, pad printing, cosmetic, automotive, glasses, connectors Household parts etc…



THE INDIRECT DISCHARGE TYPE : a unique feature

Principle : the quality and efficiency of the « classical » corona discharge without any width limit, without any thickness limit (runs without any counter electrod).

INNOVATIVE CORONA TREATMENT SURFACE


INDIRECT DISCHARGE CORONA TREATMENT

Principle : Treatment on very large zones, thick parts in complete integration on production lines

Applications : Profiles, foam plates, full or hollow pannels, honeycomb, doors panels, PP panels for clean rooms or industrial buildings, special floors in PVC, polycarbonate panels for sandwich doors etc…


Principle : treatment of parts which the profil do not allow any counter electrod in semi-automatic or full automated processes

On 3D parts with low relief on the zone to be treated :

Applications : Connectors, automotive parts, aeronautic, household, cosmetic, Packaging, medical and pharma ….

INDIRECT DISCHARGE CORONA TREATMENT

The implementation is usually made in line but can also be made off line (laboratory, mobile unit, etc…)

Every application is studied and the industrial conception made specifically to fit the improvement requirements of the adhesion coefficient and the industrial constraints : need to propose complete solutions . Application examples :

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IMPLEMENTATION


!   Atmospheric Plasma torch PLASMA Treatment

!   Piezoelectical PLASMA Treatment

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CONVENTIONAL AND INNOVATIVE

PLASMA TREATMENT


Atmospherical pressure Plasma Treatment :

Features :

-  Very concentrated plasma jet

-  Very low conductivity of the treatment

-  System settings very flexible depending on the applications : Frequency, power, gaz

-  Temperature regulation : 3 different nozzles allow to choose the surface temperature : low for

sensitive surfaces, medium for activate quicker, very high for surface cleaning

-  Flexible and really easy to integrate

-  Use of air or other gazes in order to get different surface properties or to accelerate the activation

-  Very DOE friendly !

-  Quality control available

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CONVENTIONAL PLASMA TREATMENT


Designed for :

! Groove for insulation joints gluing

! Local treatment at very high rate

! Complex or simple profiles

! Conductive as well as non conductive materials ….

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PLASMA SURFACE TREATMENT


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« CONVENTIONAL PLASMA TREATMENT


Examples of industrial applications :

! Composites materials on metal adhesion

! Cosmetic lipstick parts for printing

! Plastic card printing at very high rate

! Cable / Tube printing at very high rate

! Automotive bodywork for insulation material gluing

! Heating body metal plates for innovative solid glue adhesion

! Contact lenses individual eyedropper for printing

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! Composites materials on metal adhesion

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! Cosmetic lipstick parts for printing

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! Plastic card printing at very high rate :

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! Cable / Tube printing at very high rate

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! Automotive bodywork for insulation material gluing

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! Heating body metal plates for innovative solid glue adhesion

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! Contact lenses individual eyedropper for printing

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PLASMA SURFACE TREATMENT


Surface cleaning

PCB activation

Before overmolding

LDPE powder vaporisation

for polymer / metal adhesion


INNOVATIVE PLASMA TREATMENT

PIEZOELECTRICAL PLASMA TREATMENT


PIEZOELECTRICAL PLASMA TREATMENT

QUALITY AND EFFICIENCY OF THE TREATMENT PROCESSES

!   Surface quality identical after treatment : no alteration, neither aspect modification of the

surface, cleanliness

!   Treatment efficiency : quality stability in time = reliability of the process

!   Enegy consumption : stable and controlled

!   Technical reliability : robust equipment with very low need in maintenance

!   Industrial equipment customs made designed for production integration

!   Ecological technologies (without solvants) and very friendly to use (simple use for

operators)

SPECIFIC INNOVATIONS : Corona Indirect Discharge, Piezoelectical Plasma

FLEXIBILITY AND ADAPTATION allow to enlarge the possibilities

and opportunities for new applications and new processes !

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BENEFITS OF THE ELECTRICAL DISCHARGE TREATMENT :


Nathalie SENINCK - President

Mobile : +33 (0)6.80.01.59.03

@ : [email protected]

Place de la Mairie - 08370 La Ferté S/Chiers

FRANCE

www.stts-surface.fr

Tél : +33 (0)3.24.22.65.20

Fax : +33 (0)3.24.22.62.33

Iain Ford

Geschäftsführer - Chemisch-Technische Produkte

Managing Director - Chemical & Technical Products

Tel +43 (0)2252 80213 DW 40

[email protected]

ULBRICH Maschinenbau- und Export-Import Betriebsg.m.b.H.

Josefsthaler Strasse 34

A-2512 Tribuswinkel / Austria

CONTACT

Nathalie SENINCK

THANK YOU FOR YOUR ATTENTION…

surface treatment : new corona and plasma … · !medical / pharma / cosmetc !construction /...

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