Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting
Patent
1994-11-21
1996-03-12
Thurlow, Jeffery R.
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
15624413, 264 406, 264 407, 264149, 264166, 2642095, 2642884, 264317, 264DIG65, 425113, B29C 4792
Patent
active
054983770
ABSTRACT:
A method for producing a thermoplastic polyurethane elastomer tube where the temperature of the mandrel and the extrusion pressure used for extruding a thermoplastic polyurethane elastomer are determined before preparing the tube. The temperature of the mandrel and the extrusion pressure are set to overlap two predetermined temperature ranges. One temperature range permits hot drawing of the tube preform, and the second temperature range provides a tube preform free from the occurrence of bubbles on its surface. After the two temperature and extrusion pressure ranges are determined, a thermoplastic polyurethane elastomer is extruded on the periphery of a heated mandrel under pressure using a mandrel temperature and extrusion pressure where the two predetermined ranges overlap. Thereafter, the mandrel is pulled out to provide a tube preform, and the tube preform is hot drawn to produce a tube having a desired outer diameter. The method of the present invention can provide a thermoplastic polyurethane elastomer tube having a fine hot drawability while overcoming poor appearances due to the occurrence of bubbles or granular structure. In addition, the thermoplastic polyurethane elastomer tube has a stable quality that can be continuously produce, thus increasing the yield thereof.
REFERENCES:
patent: 2561569 (1951-07-01), Flynn
patent: 4062834 (1977-12-01), Gilding et al.
patent: 4321226 (1982-03-01), Markling
patent: 4764324 (1988-08-01), Burnham
patent: 4898702 (1990-02-01), Elkins et al.
patent: 5061424 (1991-10-01), Karimi et al.
patent: 5063018 (1991-11-01), Fontirroche et al.
patent: 5096646 (1992-03-01), Shigemoto et al.
patent: 5100379 (1992-03-01), Wendell
patent: 5409644 (1995-04-01), Martin et al.
European Search Report for EP 94118253.7.
Fuchimoto Minoru
Kaide Tamotsu
Ozaki Hidenori
Mitsubishi Cable Industries Ltd.
Thurlow Jeffery R.
LandOfFree
Production of thermoplastic polyurethane elastomer tube does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Production of thermoplastic polyurethane elastomer tube, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Production of thermoplastic polyurethane elastomer tube will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2098478