Coated Mandrels Exhibit Multiple Release Properties
Multiple releases with increased durability
PTFE coated Mandrels or otherwise known as pull wires or core wires are designed to be reusable or disposable and come in various lengths, diameters, and alloy substrates. They play a crucial role in the buildup and manufacturing of critical polymer based vascular catheters that enter the venous system. This is where utilizing Miller-Stephenson’s 850G-1040 coating offers exceptional anti-stick, multiple release properties as well as repeated strength, durability, and reliability with no flaking or delamination. These robust, abrasion resistant, durable PTFE coatings also offer the ability to utilize sensitive substrate alloys for specially designed critical medical devices or supplies.
Coating Equipment & Application Recommendations
All of our PTFE coatings can be applied via spray, dip or spool-to-spool methods. Proper pre-coating wire cleaning treatment and post-application curing equipment is critical to guarantee performance and durability. Acceptable curing equipment includes high-temperature ovens which can safely maintain temperatures of 246 °C (475 °F) or utilize IR ovens. This will ensure proper sintering of the coatings onto the wire and promote the best surface characteristics that can be achieved.
ASTM & ISO Standards Met
- ASTM 1894 Coefficient of Friction
- ASTM D3359 Adhesion Test
- ISO 7802 Wire Wrap Test
- ISO 11070 Corrosion Resistance Test
- Coated smooth stainless steel panels passed Adhesion test, ASTM-3359
- Coated stainless steel catheter guidewires passed flexibility/adhesion tests, ISO 7802 Annex F wrapping test
- Coated stainless steel catheter guidewires passed corrosion resistance, ISO11070 Annex B, saline soak test
All Miller-Stephenson’s formulations generate very uniform thin films which exceed all ISO and ASTM requirements.
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