Extruded tubing and catheters having increased rotational stiffn

Details Extruded tubing and catheters having increased rotational stiffn Extruded tubing and catheters having increased rotational stiffn

1991-07-10

1992-10-20

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Orienting or aligning solid particles in fluent matrix material

264173, 2642092, 264312, 26433121, 604264, B29C 4718

Patent

active

051567857

ABSTRACT:
Extruded catheters and other flexible plastic tubing may be manufactured with improved rotational and/or longitudinal stiffness, compared with catheters made of more conventional plastics. A tubing of liquid crystal polymer plastic-containing material may be extruded through a tube extrusion die while rotating the inner and outer die walls to provide circumferential shear to the extruded tube. Thus the liquid crystal polymer is oriented in a helical manner to provide improved properties, including greater rotational stiffness.

REFERENCES:
patent: 2437542 (1948-03-01), Krippendorf
patent: 3485234 (1969-12-01), Stevens
patent: 3585707 (1971-06-01), Stevens
patent: 3772405 (1973-11-01), Hamb
patent: 3778410 (1973-12-01), Kuhfuss et al.
patent: 4332759 (1982-06-01), Ide
patent: 4447599 (1984-05-01), Cogswell et al.
patent: 4516972 (1985-05-01), Samson
patent: 4577543 (1986-03-01), Wilson
patent: 4581399 (1986-04-01), Yoon
patent: 4636346 (1987-01-01), Gold et al.
patent: 4685090 (1987-08-01), Krevor
patent: 4728698 (1988-03-01), Isayev et al.
patent: 4729662 (1988-03-01), O'Brien
patent: 4734240 (1988-03-01), Chung et al.
patent: 4737153 (1988-04-01), Shimamura et al.
patent: 4764324 (1988-08-01), Burnham
patent: 4790831 (1988-12-01), Skribiski
patent: 4817613 (1989-04-01), Jaraczewski et al.
patent: 4842590 (1989-06-01), Tanabe et al.
patent: 4867174 (1989-10-01), Skribiski
patent: 4879081 (1989-11-01), Keep
patent: 4898591 (1990-02-01), Jang et al.
patent: 4973442 (1990-11-01), Harvey et al.
patent: 5059269 (1991-10-01), Hu et al.
Translation of Japanese Patent Appln. No. 63-199622 published on Aug. 18, 1988 Title: Moulding Method for Multilayer Film Patent No. 62-31082, Application Date Feb. 13, 1987.
2 page article-LCP Activity Increases: New Suppliers, Products Modern Plastics, Apr., 1989 pp. 166 & 168.
M. Meier entitled The Extrusion of Liquid Crystal Polymers ANTEC, 1989 pp. 200-202.
James L. White & John F. Fellers entitled: Macromolecular Liquid Crystals and Their Applications to High-Modulus and Tensile-Strength Fibers, (1978) pp. 137-173.
G. W. Farell and J. F. Fellers entitled A Rotating Annular Die to Control the Biaxial Orientation in Melt Processed Thermotropic Liquid Crystalline Cellulose Derivatives-Journal of Polymer Engineering, vol. 6, Nos. 1-4, 1986 pp. 263-289.
D. G. Baird and R. Ramanathan entitled The In-situ Generation of Liquid Crystalline Reinforcements in Engineering Thermoplastics 22 pages.

Affiliated with

Also associated with

Rating

Extruded tubing and catheters having increased rotational stiffn does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Extruded tubing and catheters having increased rotational stiffn, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Extruded tubing and catheters having increased rotational stiffn will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-190299