WEVO: Reliable adhesive bonding for filters

 Photo: WEVO
Pretreatment with Openair plasma ensures optimum adhesion in the bonding of filter end caps.
For over 60 years WEVO-CHEMIE has developed, produced and sold electrical casting resins and adhesives based on polyurethane and epoxide resin. Predominantly manufacturers in the fields of the electrical/electronics industry, automobile electronics and the filter industry are supplied with these products.
One of the special challenges in the filter industry is the adhesive bonding of filter end caps. Here very good adhesion is required even under extreme operating conditions involving, for example, prolonged exposure to oil at temperatures of about 150 °C. A further difficulty in this process is that before bonding the end caps are often slightly soiled with oily accretions. Pretreatment with plasma provides a suitable method in this case for ensuring a rapid bonding process and avoiding expensive cleaning operations on the surfaces.
Numerous customers of WEVO-CHEMIE are very successfully employing the Openair® atmospheric pressure plasma developed by Plasmatreat and by this means achieving optimum adhesion of PU and epoxy adhesives to polyamide end caps.
Another field of application for this plasma pretreatment is found in the production of automobile sensors. Special polyurethane casting resins are typically used for this purpose. Here, as a general rule, there is the risk that in plastics having a high glass fibre content or in the case of non-polar surfaces the components will be infiltrated with moisture in demanding service life tests and as a result failures will occur. To prevent this in this field also, critical surfaces have been successfully pretreated by means of Openair® plasma immediately prior to the casting process.
Dr. Christina Benedek
Technical Sales Manager


Put atmospheric plasma to the test in your production.
Become development partner of Plasmatreat!

Plasmatreat North America Inc.
1480 Sandhill Dr., Unit 8,
Ancaster, ON L9G 4V5

Phone: +1 905 304-5200
Fax: +1 905 304-5260

Contact: Mr. Tim Smith

Plasmatreat USA, Inc
2541 Technology Drive, Suite 407
Elgin, IL 60124

Phone: +1 847-783-0622
Fax: +1 847-783-0991

Contact: Mr. Jeff Leighty

Plasmatreat USA, Inc
4th State, Inc.
1260 Elmer Street
Belmont, CA 94002

Phone: +1 650 596 1606
Fax: +1 650 596 1180

Contact: Mr. Wally Hansen

Automotive World 2017
Asia's largest exhibition for automotive technologies

January 18 – 20, 2017
East Hall 6, E54-17
Tokyo Big Sight
Tokyo, Japan

MD&M West
World's Largest Annual Medtech Event

February 7 – 9, 2017
Anaheim Convention Center
Anaheim, CA , United States