Producing a Heat Resistant and Wear Resistant Product
The concept of U.S. Patent 4813969 is to manufacture synthetic hair that has a high thermal resistance. Each hair fiber is given a diffuse light refraction by altering its structure surface. This is done by chemically disturbing the surface. The surface of a single filament polyester fiber is disturbed via a corrosive alkaline lye. The solution of about 20 grams/liter of natrium hydroxide is applied to the fiber at a temperature of 96 degrees to 100 degrees Celsius.
The proposal of U.S. Patent 6343606 is to create a wear resistant synthetic hair product. This is achieved by mixing a monofilament nylon 6 mat with a diameter of roughly 0.09 millimeters. The fiber is 0.55 percent titanium dioxide and 0.37 percent calcium carbide by weight. The composition is heated to a temperature of 150 degrees Celsius.
The thought of U.S. Patent 4377427 is how to hitch the synthetic fibers into locks of artificial hair. The locks of synthetic hair are grouped into bundles, welded together and cut by ultrasonic waves. Each fiber bundle is placed on a platform which has a pointed ridge. A component which is comprised of the emitter and an ultrasound tool is moved downwardly in two stages. The emitter is deactivated and returned to its upper position.
U.S. Patent 3727619 is a technique for joining synthetic hair and human hair. Ultrasonic vibrational energy is used to hitch synthetic and human hair together. Overlapping portions of synthetic hair and human hair are maintained in a hard and fast position to each other. Energy is introduced. The hair may be coated with a thermoplastic material which acts as the bonding agent.
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