High tenacity, high modulus polyethylene and polypropylene fiber

Details High tenacity, high modulus polyethylene and polypropylene fiber High tenacity, high modulus polyethylene and polypropylene fiber

1982-03-19

1983-11-01

Levin, Stanford M.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

264164, 264205, 2642108, 524108, 524366, 524462, 524464, 524583, 524585, 526351, 526352, C08F 1002, C08F 1006, D01F 604, D01F 606

Patent

active

044131100

ABSTRACT:
Solutions of ultrahigh molecular weight polymers such as polyethylene in a relatively non-volatile solvent are extruded through an aperture at constant concentration through the aperture and cooled to form a first gel of indefinite length. The first gels are extracted with a volatile solvent to form a second gel and the second gel is dried to form a low porosity xerogel. The first gel, second gel or xerogel, or a combination, are stretched. Among the products obtainable are polyethylene fibers of greater than 30 or even 40 g/denier tenacity and of modulus greater than 1000 or even 1600 or 2000 g/denier.

REFERENCES:
patent: 4137394 (1979-01-01), Meihuizen et al.
Smith et al., "Ultrahigh-Strength Polyethylene Filaments by Solution Spinning and Hot Drawing", Polymer Bulletin, vol. 1, pp. 733-736, (1979).
Cansfield et al., "The Preparation of Ultra-High Modulus Polypropylene Films and Fibres", Polymer Eng. & Sci., vol. 16, No. 11, pp. 721-724, (1976).
Kalb & Pennings, "Hot Drawing of Porous High Molecular Weight Polyethylene", Polymer Bulletin, vol. 1, pp. 879-880, (1979).
Kalb & Pennings, "Maximum Strength and Drawing Mechanism of Hot Drawn High Molecular Weight Polyethylene", J. Mat. Sci., vol. 15, pp. 2584-2590, (1980).
Imada et al., "Crystal Orientation and Some Properties of Solid-State Extrudate of Linear Polyethylene", J. Mat. Sci. 6, (1971), 537-546.
Smith et al., "Ultradrawing of High-Molecular-Weight Polyethylene Cast From Solution", J. Pol. Sci., 19, 877-888, (1981).
Smith et al., "Ultrahigh-Strength Polyethylene Filaments . . . ", Makromol. Chem., 180, 2983-2986, (1979).
Kalb et al., "Spinning of High Molecular Weight Polyethylene . . . ", Polymer Bulletin 1, 871-876, (1979).
Smith et al., "Ultra-High-Strength Polyethylene . . . ", J. Mat. Sci. 15, (1980), 505-514.
Kalb & Pennings, "Hot Drawing of Porous High Molecular Weight Polyethylene", Polymer 21, (1), 3-4, (1980).
Smook et al., "Influence of Spinning/Hot Drawing Conditions on the Tensile Strength of Porous High Molecular Weight Polyethylene", Polymer Bulletin, vol. 2, pp. 775-783, (1980).

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