Process for drawing gel-spun polyethylene yarns

Details Process for drawing gel-spun polyethylene yarns Process for drawing gel-spun polyethylene yarns

2003-10-31

2008-03-18

Johnson, Christina (Department: 1732)

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

C264S211170

Reexamination Certificate

active

07344668

ABSTRACT:
A process for drawing essentially diluent-free gel-spun polyethylene multi-filament yarns in a forced convection air oven and the drawn yarns produced thereby, The process conditions of draw ratio, stretch rate, residence time, oven length and feed speed are selected in specific relation to one another so as to achieve enhanced efficiency and productivity. The drawn yarns are useful in armor, composites, fishing line, ropes, sutures, fabrics and other applications.

REFERENCES:
patent: 4248577 (1981-02-01), Bory et al.
patent: 4411854 (1983-10-01), Maurer et al.
patent: 4413110 (1983-11-01), Kavesh et al.
patent: 4422993 (1983-12-01), Smith et al.
patent: 4430383 (1984-02-01), Smith et al.
patent: 4436689 (1984-03-01), Smith et al.
patent: 4536536 (1985-08-01), Kavesh et al.
patent: 4545950 (1985-10-01), Motooka et al.
patent: 4551296 (1985-11-01), Kavesh et al.
patent: 4612148 (1986-09-01), Motooka et al.
patent: 4617233 (1986-10-01), Ohta et al.
patent: 4663101 (1987-05-01), Kavesh et al.
patent: 5032338 (1991-07-01), Weedon et al.
patent: 5045258 (1991-09-01), van Breen et al.
patent: 5246657 (1993-09-01), Yagi et al.
patent: 5286435 (1994-02-01), Slutsker et al.
patent: 5342567 (1994-08-01), Chen et al.
patent: 5505900 (1996-04-01), Suwanda et al.
patent: 5578374 (1996-11-01), Dunbar et al.
patent: 5736244 (1998-04-01), Kavesh et al.
patent: 5741451 (1998-04-01), Dunbar et al.
patent: 5958582 (1999-09-01), Dunbar et al.
patent: 5972498 (1999-10-01), Kavesh et al.
patent: 6448359 (2002-09-01), Kavesh
patent: 0 077590 (1983-04-01), None
patent: 0 320 188 (1989-06-01), None
patent: 2042414 (1980-09-01), None
patent: A-60/52647 (1983-08-01), None
patent: 238416-1995 (1995-09-01), None
Robert H. Perry, Perry's Chemical Engineers' Handbook, 1984, McGraw-Hill Book Company, Sixth Edition, pp. 10-5 and 10-14 through 10-16.
Eckert and Drake, Heat and Mass Transfer, McGraw-Hill Book Company, 1959, p. 121.
P. Smith et al., “Ultrahigh-Strength Polyethylene Filaments by Solution Spinning/Drawing, 2, Influence of Solvent on the Drawability”Macromol. Chem., 180, 2983 (1979).
P. Smith et al., “Ultra-high-strength Polyethylene Filaments by Solution Spinning/Drawing”J. Matl. Sci, 15, 505, 1980.
Kalb et al., Hot Drawing of Porous High Molecular Weight Polyethylene,Polymer, 21, 3 (1980).
J. Smook et al., “Influence of Spinning/Hot Drawing Conditions on the Tensile Strength of Porous High Molecular Weight Polyethylene”,Poly. Bull., 2, 775 (1980).
J. Smook et al., “the Effect of Temperature and Deformation Rate on the Hot Drawing Behavlior of Porous High-Molecular Weight PE Fibers”,J.Appl. Poly.Sci.,27,2209 (1982).
B. Kalb et al.,“Spinning of High Molecular Weight PESolution and Subsequent Drawing in A Temperature Gradient”,Poly. Bull., 1, 871 (1979).
J. Smook et. al.,“Elastic Flow Instabilities and Shish-Kebab Formation During Gel-Spinning Of Ultra-High Molecular Weight Polyethylene”,J. Matl. Sci. 19, 31 (1984).
A.J. Pennings et al., “Mechanical Properties of Ultra-High Molecular Weight PE Fibres in Relation to Structural Changes and Chain Scissioning Upon Spinning and Hot Drawing”,J. Matl. Sci., 19, 3443 (1984).
J.P.Penning et al., “The Effect of Fibre Diameter on the Drawing Behaviour of Gel-Spun Ultra-High Molecular Weight PE Fibres”,Poly. Bull., 31, 243 (1993).
P. Smith et al., Ultradrawing of High Molecular Weight PE Cast From Solution. II. Influence of Polymer Concentration,J. Poly. Sci., Poly. Phys. Ed., 19, 877 (1981).

Affiliated with

Also associated with

Rating

Process for drawing gel-spun polyethylene yarns does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for drawing gel-spun polyethylene yarns, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for drawing gel-spun polyethylene yarns will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3974842