Claims
- 1. A film or fiber consisting essentially of polyethylene having a weight average molecular weight between about 200,000 and less than 800,000 kg/kg mole, said fiber or film having a tensile modulus of at least 350 grams/denier, a tenacity of at least 13 grams/denier, a crystalline orientation function of at least 0.95, a main melting temperature of at least 140.degree. C. (measured at 10.degree. C./minute heating rate by differential scanning calorimetry), an ultimate elongation of not more than 5%, and a traverse microfibrillar spacing of less than 150 .ANG..
- 2. The fiber or film of claim 1 wherein the polyethylene has a weight average molecular weight between 250,000 and 750,000, and the fiber or film has a tensile modulus of at least 500 grams/denier and a tenacity of at least 15 grams/denier.
- 3. The fiber or film of claim 2 wherein the fiber or film has a tensile modulus of at least 750 grams/denier and a tenacity of at least 18 grams/denier.
- 4. The fiber or film of claim 1 wherein the main melting temperature is at least 141.degree. C.
- 5. The fiber or film of claim 4 wherein the polyethylene has a weight average molecular weight between 300,000 and 700,000, and the fiber or film has a tensile modulus of at least 750 grams/denier and a tenacity of at least 20 grams denier.
- 6. The fiber or film of claim 4 wherein the tensile modulus is at least 1000 grams/denier and the tenacity is at least 20 grams/denier.
- 7. The fiber or film of claim 1 further having a crystallinity of at least 70%.
- 8. The fiber or film of claim 1 wherein the porosity is less than 10% by volume.
- 9. A film or fiber consisting essentially of polyethylene having a weight average molecular weight between 200,000 and 800,000 kg/kg mole, said fiber or film having a tensile modulus of at least 350 grams/denier, a tenacity of at least 13 grams/denier, a crystalline orientation function of at least 0.95, a main melting temperature of at least 140.degree. C. (measured at 10.degree. C./minute heating rate by differential scanning calorimetry), an ultimate elongation of not more than 5%, and said fiber or film having been produced by a solution spinning process in which a solution of the polyethylene is subjected to stretching at a ratio of at least 3:1.
- 10. Yarn comprising polyethylene fiber having a weight average molecular weight between 200,000 and 800,000 kg/kg mole, said fiber or film having a tensile modulus of at least 350 grams/denier, a tenacity of at least 13 grams/-denier, a crystalline orientation function of at least 0.95, a main melting temperature of at least 140.degree. C. (measured at 10.degree. C./minute heating rate by differential scanning calorimetry), an ultimate elongation of not more than 5%, and a traverse microfibrillar spacing of less than 150 .ANG..
- 11. A film or fiber consisting essentially of polyethylene having a weight average molecular weight between 200,000 and 500,000 kg/kg mole, said fiber or film having a tensile modulus of at least 350 grams/denier, a tenacity of at least 13 grams/denier, a crystalline orientation function of at least about 0.95, a main melting temperature of at least 140.degree. C. (measured at 10.degree. C./minute heating rate by differential scanning calorimetry), an ultimate elongation of not more than 5%, and said fiber or film having been produced by a solution spinning process in which a solution of the polyethylene is subjected to stretching at a ratio of at least 3:1.
- 12. A film or fiber consisting essentially of polyethylene having a weight average molecular weight between 200,000 and 4,000,000 kg/kg mole, said fiber or film having a tensile modulus of at least 350 grams/denier, a tenacity of at least 13 grams/denier, a crystalline orientation function of at least 0.95, a main melting temperature of at least 140.degree. C. (measured at 10.degree. C./minute heating rate by differential scanning calorimetry), an ultimate elongation of not more than 5%, and a traverse microfibrillar spacing of less than 150 .ANG..
- 13. A film or fiber consisting essentially of polyethylene having a weight average molecular weight between 200,000 and less than 4,000,000 kg/kg mole, said fiber or film having a tensile modulus of at least 350 grams/denier, a tenacity of at least 13 grams/denier, a crystalline orientation function of at least 0.95, a main melting temperature of at least 140.degree. C. (measured at 10.degree. C./minute heating rate by differential scanning calorimetry), an ultimate elongation of not more than 5%, and said fiber or film having been produced by a solution spinning process in which a solution of the polyethylene is subjected to stretching at a ratio of at least 3:1.
Parent Case Info
This application is a continuation of application Ser. No. 08/107,421 filed Aug. 16, 1993, now abandoned which is a continuation of Ser. No. 07/629,183 filed on Dec. 21, 1990 (abandoned), which is a continuation of Ser. No. 07/241,800 filed on Sep. 6, 1988 (abandoned), which is a continuation of Ser. No. 06/812,709 filed on Dec. 23, 1985 (abandoned), which is a divisional of Ser. No. 06/690,914 filed on Jan. 11, 1985, (U.S. Pat. No. 4,663,101).
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Divisions (1)
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690914 |
Jan 1985 |
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Continuations (4)
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107421 |
Aug 1993 |
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Parent |
629183 |
Dec 1990 |
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