METHOD FOR COATING PLASTICS WITH URETHANE USING PLASMA

摘要

PURPOSE: A method for coating plastics with urethane using plasma is provided to save a manufacturing cost by coating a surface of an inexpensive plastic material with an urethane material. CONSTITUTION: An inexpensive plastic, such as a polypropylene, a polyethylene, etc., is formed into a product in a final form. The product formed in a final form is subjected to a plasma treatment under a normal pressure. The product subjected to a plasma treatment is coated with an urethane on its surface. The plasma treatment causes the surface of the product to be modified for a time between 0.1 to 100 seconds in a chamber of frequency between 5 to 50 Hz, a supplied power between 0.3 to 1.5 KW, and a distance between 10 to 200 mm from an electrode to an object to be worked, thereby the surface of the product is changed from a hydrophobic state into a hydrophilic state.