EP0139141A2
Expired / Lapsed
EP
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Production of stretched polymeric material having high strength and high modulus
Assignee: Toyobo Co Ltd
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Filing: 1984-08-14
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Granted: —
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Expires: 2004-08-14
Abstract
Abstract A method for preparing a stretched polymeric material of high strength and high modulus which comprises shaping a dilute solution of a synthetic polymer having an average molecular weight of not less than 3 x 10<5>, followed by cooling to make a gel-like filament or film, and stretching the resultant gel-like filament or film at a high stretch ratio, characterized in that a solution or dispersion of (a) the gel-like globules of said synthetic polymer having the solvent occluded therein or (b) the fine powders of said synthetic polymer having an average particle weight of not more than 5 x 10<-><5> mg per particle in a solvent is used as or for preparation of said polymer solution to be shaped.
Inventors
- 👤 Shosuke Nanri
- 👤 Tokio Kawaguchi
- 👤 Hiroshi Yasuda
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 13:24
CPC Classifications
D; D01; D01D; D01D5/00; B; B29; B29C; B29C48/00; B29C48/022; C; C08; C08J; C08J5/00; C08J5/18; B29C48/001; B29C48/0018; B29C48/03; B29C48/04; B29C48/05; B29C48/07; B29C48/08; B29K; B29K2105/00; B29K2105/06; B29K2105/08; B29K2105/10; B29K2105/101; B29L; B29L2007/00; B29L2007/008; B29L2031/00; B29L2031/731
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
122 words
A method for preparing a stretched polymeric material of high strength and high modulus which comprises shaping a solution of a synthetic polymer having an average molecular weight of not less than 3 x 10 5 , followed by cooling to make a gel-like filament or film, and stretching the resultant gel-like filament or film at a high stretch ratio, characterized in that a solution or dispersion of (a) the gel-like globules of said synthetic polymer having a solvent occluded therein or (b) the fine powders of said synthetic polymer having an average particle weight of not more than 5 x 10 -5 mg per partile in a solvent is used as or for preparation of said polymer solution to be shaped.
Claim 2
Independent Claim
122 words
A method for preparing a stretched polymeric material of high strength and high modulus which comprises shaping a solution of a synthetic polymer having an average molecular weight of not less than 3 x 10 5 , followed by cooling to make a gel-like filament or film, and stretching the resultant gel-like filament or film at a high stretch ratio, characterized in that a solution or dispersion of (a) the gel-like globules of said synthetic polymer having a solvent occluded therein or (b) the fine powders of said synthetic polymer having an average particle weight of not more than 5 x 10 -5 mg per partile in a solvent is used as or for preparation of said polymer solution to be shaped.
Claim 3
Dependent Claim
27 words
The method according to claim 1, wherein the gel-like globules (a) are those prepared by dissolving the synthetic polymer in the solvent and cooling the resulting solution.
Claim 4
Dependent Claim
24 words
The method according to claim 1 or 2, wherein the gel-like globules (a) have an average particle size of not more than 1 mm.
Claim 5
Independent Claim
26 words
The method according to any of claims 1 to 3, wherein the gel-like globules (a) comprise monoglobular gel-like particles or their mixture with polyglobular gel-like particles.
Claim 6
Dependent Claim
21 words
The method according to claim 4, wherein the monoglobular gel-like particles have an average particle size of 10 to 200 µm.
Claim 7
Dependent Claim
23 words
The method according to claim 4, wherein the polyglobular gel-like particles are each a collective body of 2 to 20 monoglubular gel-like particles.
Claim 8
Dependent Claim
83 words
The method according to claim 1, wherein the gel-like globules (a) or the fine powders (b) are dissolved or dispersed homogeneously in a solvent, the resultant solution or dispersion is supplied to the hopper of an extruder for spinning or film-forming at a temperature of not higher than the swelling temperature of the gel-like globules, the supplied solution or dispersion is heated in the extruder so as-to make the gel-like globules dissolved in the solvent, and the resulting solution is subjected to shaping.
Claim 9
Dependent Claim
19 words
The method according to claim 1, wherein the shaped product is subjected contiunously to stretching at the first stage.
Claim 10
Independent Claim
25 words
The method according to clacm I, wherein the synthetic polymer is at least one chosen from polyolefin, polyacrylonitrile, polyvinylidene fluoride, polyvinyl alcohol, polyamide and polyester.
Claim 11
Independent Claim
25 words
The method according to clacm I, wherein the synthetic polymer is at least one chosen from polyolefin, polyacrylonitrile, polyvinylidene fluoride, polyvinyl alcohol, polyamide and polyester.
Claim 12
Dependent Claim
17 words
The method according to claim 9, wherein the synthetic polymer is polyethylene, polypropylene, polyvinyl alcohol or polyacrylonitrile.
Claim 13
Independent Claim
30 words
The method according to any of claims 1, 9 and 10, wherein the synthetic polymer has an average molecular weight of not less than 1 x 1 0 6 .
Claim 14
Dependent Claim
115 words
A stretched polymeric material of high strength and high modulus, obtained by dissolving or dispersing (a) the gel-like globules of a synthetic polymer of not less than 3 x 10 5 in average molecular weight having a solvent occluded therein, said gel-like globules being prepared by dissolving said synthetic polymer in the solvent and then subjecting the resulting solution to cooling, or (b) the fine powders of said synthetic polymer having an average particle weight of not more than 5 x 10" mg in a solvent, shaping the resulting solution or dispersion, followed by cooling to make a gel-like filament or film, and stretching the resultant gel-like filament or film at a high stretch ratio.
Claim 15
Dependent Claim
115 words
A stretched polymeric material of high strength and high modulus, obtained by dissolving or dispersing (a) the gel-like globules of a synthetic polymer of not less than 3 x 10 5 in average molecular weight having a solvent occluded therein, said gel-like globules being prepared by dissolving said synthetic polymer in the solvent and then subjecting the resulting solution to cooling, or (b) the fine powders of said synthetic polymer having an average particle weight of not more than 5 x 10" mg in a solvent, shaping the resulting solution or dispersion, followed by cooling to make a gel-like filament or film, and stretching the resultant gel-like filament or film at a high stretch ratio.
Claim 16
Dependent Claim
27 words
The stretched polymeric material according to clacm 12, wherein the synthetic polymer is at least one chosen from polyolefin, polyacrylonitrile, polyvinylidene fluoride, polyvinyl alcohol, polyamide and polyester.
Claim 17
Dependent Claim
27 words
The stretched polymeric material according to clacm 12, wherein the synthetic polymer is at least one chosen from polyolefin, polyacrylonitrile, polyvinylidene fluoride, polyvinyl alcohol, polyamide and polyester.
Claim 18
Dependent Claim
19 words
The stretched polymeric material according to claim 12, wherein the synthetic polymer is polyethylene, polypropylene, polyvinyl alcohol or polyacrylonitrile.
Claim 19
Dependent Claim
28 words
The stretched polymeric material according to claim 14, wherein the synthetic polymer is polyethylene having an average molecular weight of not less than 1 x 10 6 .
Claim 20
Dependent Claim
52 words
A stretched polyethylene filament of high strength and high modulus, which has a sectional flatness of not less than 1.7, multi-grooves arranged in parallel and extended in lengthwise direction at the surface and a tensile strength of not less than 30 g/d and an initial modulus of not less than 800 g/d.
Claim 21
Dependent Claim
52 words
A stretched polyethylene filament of high strength and high modulus, which has a sectional flatness of not less than 1.7, multi-grooves arranged in parallel and extended in lengthwise direction at the surface and a tensile strength of not less than 30 g/d and an initial modulus of not less than 800 g/d.
Claim 22
Dependent Claim
33 words
The polyethylene filament according to claim 16, wherein the multi-gooves are so arranged that at least two grooves are present per 10 microns of average distance in normal direction to the filament axis.
Claim 23
Dependent Claim
54 words
Gel-like globules of polyethylene for preparation of filaments or films of high strength and high modulus, said polyethylene having an average molecular weight of not less than 3 x 10 5 , said gel-like globules occluding a solvent therein and the average particle size of said gel-like globules being not more than 200 µm.
Claim 24
Dependent Claim
54 words
Gel-like globules of polyethylene for preparation of filaments or films of high strength and high modulus, said polyethylene having an average molecular weight of not less than 3 x 10 5 , said gel-like globules occluding a solvent therein and the average particle size of said gel-like globules being not more than 200 µm.
Claim 25
Dependent Claim
35 words
The gel-like globules according to claim 18, which comprise monoglobular gel-like particles or their mixture with polyglobular gel-like particles, said polyglobular gel-like particles being each a collective body of 2 to 20 monoglobular gel-like particles.
References Cited (Backward Citations)
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