EP0047464B1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Undrawn polyester yarn and process for manufacturing the same
Assignee: Teijin Ltd
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Filing: 1981-09-01
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Granted: 1985-01-23
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Expires: 2001-09-01
Abstract
No abstract record available.
Inventors
- 👤 Kohichi Iohara
- 👤 Michikage Matsui
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 23:09
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/88; D01F6/92; C; C08; C08L; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
170 words
An undrawn polyester yarn which comprises a polyester comprising an aromatic dicarboxylic acid as the main acid component characterized in that it further comprises 0.2 to 10% by weight of a polymer (exclusive of a styrene type polymer) having a recurring unit structure represented by the following formula (1): wherein R, and R 2 stand for substituents consisting of optional atoms selected from C, H, N, O, S, P and halogen atoms, with the proviso that the sum of the molecular weights of R 1 and R 2 is at least 40, and n is a positive integer, and having a molecular weight of at least 1,000, the elongation increase ratio (1) of said undrawn polyester yarn, represented by the following formula (2), being at least 8%: wherein EL b stands for the residual elongation (%) of said undrawn yarn and EL o stands for the residual elongation (%) of a corresponding undrawn polyester yarn substantially free of said polymer having a recurring unit structure represented by the formula (1).
Claim 2
Dependent Claim
170 words
An undrawn polyester yarn which comprises a polyester comprising an aromatic dicarboxylic acid as the main acid component characterized in that it further comprises 0.2 to 10% by weight of a polymer (exclusive of a styrene type polymer) having a recurring unit structure represented by the following formula (1): wherein R, and R 2 stand for substituents consisting of optional atoms selected from C, H, N, O, S, P and halogen atoms, with the proviso that the sum of the molecular weights of R 1 and R 2 is at least 40, and n is a positive integer, and having a molecular weight of at least 1,000, the elongation increase ratio (1) of said undrawn polyester yarn, represented by the following formula (2), being at least 8%: wherein EL b stands for the residual elongation (%) of said undrawn yarn and EL o stands for the residual elongation (%) of a corresponding undrawn polyester yarn substantially free of said polymer having a recurring unit structure represented by the formula (1).
Claim 3
Dependent Claim
20 words
An undrawn polyester yarn as set forth in claim 1, wherein the elongation increase ratio (I) is at least 15%.
Claim 4
Dependent Claim
30 words
An undrawn polyester yarn as set forth in claim 1, wherein the content of the polymer having recurring units represented by the formula (1) is 0.5 to 6% by weight.
Claim 5
Dependent Claim
34 words
An undrawn polyester yarn as set forth in claim 1, wherein R, and R 2 each of the formula (1) stand for a linear or branched alkyl group having up to 15 carbon atoms.
Claim 6
Dependent Claim
23 words
An undrawn polyester yarn as set forth in claim 4, wherein the polymer having recurring units represented by the formula (1) is poly(4-methyl-1-pentene).
Claim 7
Dependent Claim
57 words
An undrawn polyester yarn as set forth in claim 1, wherein in the formula (1 ), R 1 stands for an alkyl group having up to 5 carbon atoms and R 2 stands for a carboxylic acid ester represented by the formula in which R 3 stands for an alkyl group having 1 to 5 carbon atoms.
Claim 8
Dependent Claim
24 words
An undrawn polyester yarn as set forth in claim 6, wherein the polymer having recurring units represented by the formula (1) is poly(methyl methacrylate).
Claim 9
Dependent Claim
148 words
A process for manufacturing an undrawn polyester yarn characterized in that it comprises the following steps: melting a polyester comprising an aromatic dicarboxylic acid as the main acid component with an addition of 0.2 to 10% by weight of a polymer (exclusive of a styrene type polymer) having a recurring unit structure represented by the following formula (1), wherein R 1 and R 2 stand for a substituent consisting of optional atoms selected from C, H, N, O, S, P and halogen atoms, with the proviso that the sum of the molecular weights of R, and R 2 is at least 40, and n is a positive integer, the additive polymer being uniformly dispersed in the polyester in particles having a diameter not larger than 1 um; spinning the melt from a spinneret; and taking up the spun yarn at a speed of between 850 and 8000 m/min.
Claim 10
Dependent Claim
148 words
A process for manufacturing an undrawn polyester yarn characterized in that it comprises the following steps: melting a polyester comprising an aromatic dicarboxylic acid as the main acid component with an addition of 0.2 to 10% by weight of a polymer (exclusive of a styrene type polymer) having a recurring unit structure represented by the following formula (1), wherein R 1 and R 2 stand for a substituent consisting of optional atoms selected from C, H, N, O, S, P and halogen atoms, with the proviso that the sum of the molecular weights of R, and R 2 is at least 40, and n is a positive integer, the additive polymer being uniformly dispersed in the polyester in particles having a diameter not larger than 1 um; spinning the melt from a spinneret; and taking up the spun yarn at a speed of between 850 and 8000 m/min.
Claim 11
Dependent Claim
32 words
A process for manufacturing an undrawn polyester yarn according to claim 8, wherein the content of the polymer having recurring units represented by the formula (1) is 0.5 to 6% by weight.
Claim 12
Dependent Claim
27 words
A process for manufacturing an undrawn polyester yarns according to claim 8, wherein the speed of taking up the spun yarn is between 1500 and 8000 m/min.
References Cited (Backward Citations)
No citation records indexed.
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