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Contact Information:

Tel:  +44 (0) 1543 411460
Fax: +44 (0) 1543 415140
Post: Dyne Technology Ltd
         Newton House
         5 Parkside Court,
         Greenhough Road
         Lichfield
         Staffordshire,
         WS13 7FE
         United Kingdom.
 
E-mail   
info@dynetechnology.co.uk
 
Web Site:
www.dynetechnology.co.uk

 

CORONA TREATMENT OF CATHETERS:

      

By increasing the surface tension on catheter tubing, corona treatment improves the bonding properties of adhesives and coatings – thereby adding extra safety and reliability to high value medical devices.

Catheter tubing is often manufactured from polypropylene or hypoallergenic PVC therefore surface treatment of is required to ensure that coatings and inks adhere to the catheter tube surface. Tantec A/S represented in the UK by Dyne Technology Ltd has been working with the adhesion problems on catheter tubing for 12 years and is now capable of offering two of the most advanced surface treatment technologies available i.e. Plasma and Corona treatment.

Both of these processes eliminate many of the risks and disadvantages associated with other treatment technologies, such as no loss of high gloss surface finish, no thermal stress to the product, no use of hazardous chemicals, etc. Our Corona and Plasma systems allows substantial flexibility in the treatment of a wide variety of materials and products used in the medical industry, and is a key process to solve adhesion problems.

The simplest definitions of Corona and Plasma treatment is that they are methods of increasing the surface tension of certain materials. Increased surface tension ensures that other materials such as a coating, glue or printing ink will bond better to the treated material. The process chemically roughens the surface, and allows it to “grab onto” the ink, coating, or adhesive being applied. The resulting chemical bond that occurs is thus stronger than a simple mechanical bond with the surface.

 Corona - Partial treatment prior to gluing

One of Europe’s largest producers of catheter tubing faced a situation where they could not make the shaft of a catheter stick to the tube. We devised a solution that involved partial corona treatment of the tubing. Only the end of the tube is treated before the glue was applied and the shaft attached. This partial treatment ensures a very strong adhesion between the components – thereby increasing the safety of the product.

Corona, In-line production prior to printing

Another customer required their catheter tubes to be treated on the entire surface prior to printing as part of a continuous production process. The customer’s needs were met by developing a corona treater that fits into a continuous production process and that ensures an even treatment of the entire catheter tube surface. 

Plasma - 3D surface preparation prior to coating

A third producer of wanted to plasma treat semi-finished catheter tubes. The extruded tubes had already been cut to size and were to be entirely treated prior to coating. The customer’s production process required some new thinking, and this resulted in a tailor-made vacuum chamber in which 90 catheter tubes could be treated at the same time.  

Choosing the right treatment method

Deciding on the best treatment method for a particular job can be difficult before the entire production process has been analysed. To identify which method is the best for a given product depends on whether the surface is to be glued, printed or coated and whether complete or only partial surface treatment is required. After analysing the process in detail, Dyne Technology Ltd can offer a treatment solution that can be specially adapted to virtually any new or existing production process.

 

Contact Information:

Phone:    +44 (0) 1543 411460
Fax:        +44 (0) 1543 415140
Post:        Dyne Technology Ltd, Newton House, 5 Parkside Court, Greenhough Road, Lichfield, Staffordshire, WS13 7FE, United Kingdom.
E-mail     info@dynetechnology.co.uk

 

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