EP0049412A1
Expired / Lapsed
EP
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A polyester multifilament yarn and a process for manufacturing the same
Assignee: Teijin Ltd
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Filing: 1981-09-21
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Granted: —
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Expires: 2001-09-21
Abstract
Abstract A polyester multifilament consisting essentially of a filament groups (I) and (II). The filament group (I) is composed of a polyester selected from the group consisting of polyethylene terephthalate, polytrimethylene terephthalate and polytetramethylene terephthalate, and/or a blend and/or copolymer comprising at least two members selected from the polyesters. The filament group (II) is composed of a substrate composed of a polyester selected from the group consisting of polyethylene terephthalate, polytrimethylene terephthalate and polytetramethylene terephthalate, and/or a blend and/or a copolymer comprising at least two members selected from the polyesters and at least one polymer selected from the group consisting of styrene type polymers, methacrylate type polymers and acrylate type polymers, which is added to said substrate in an amount of 0.4 to 8% by weight based on the substrate.
Inventors
- 👤 Kohichi Iohara
- 👤 Michikage Matsui
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 22:56
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02; D; D01; D01F; D01F6/00; D01F6/88; D01F6/92; D02; D02G; D02G1/00; D02G1/02; D02G1/0286; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2904; Y10T428/2913; Y10T428/2929; Y10T428/2973; Y10T428/2976
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
123 words
A polyester multifilament yarn consisting essentially of: a filament group (I) composed of a polyester selected from the group consisting of polyethylene terephthalate, polytrimethylene terephthalate and polytetramethylene terephthalate, and/or a blend and/or copolymer comprising at least two members selected from said polyesters; and a filament group (II) composed of a substrate composed of a polyester selected from the group consisting of polyethylene terephthalate, polytrimethylene terephthalate and polytetramethylene terephthalate, and/or a blend and/or copolymer comprising at least two members selected from said polyesters and at least one polymer selected from the group consisting of styrene type polyemrs, methacrylate type polymers and acrylate type polymers, which is added to said substrate in an amount of 0.4 to 8 % by weight based on the substrate.
Claim 2
Dependent Claim
123 words
A polyester multifilament yarn consisting essentially of: a filament group (I) composed of a polyester selected from the group consisting of polyethylene terephthalate, polytrimethylene terephthalate and polytetramethylene terephthalate, and/or a blend and/or copolymer comprising at least two members selected from said polyesters; and a filament group (II) composed of a substrate composed of a polyester selected from the group consisting of polyethylene terephthalate, polytrimethylene terephthalate and polytetramethylene terephthalate, and/or a blend and/or copolymer comprising at least two members selected from said polyesters and at least one polymer selected from the group consisting of styrene type polyemrs, methacrylate type polymers and acrylate type polymers, which is added to said substrate in an amount of 0.4 to 8 % by weight based on the substrate.
Claim 3
Dependent Claim
36 words
A polyester multifilament yarn as set forth in claim 1, wherein the average breaking elongation of filaments of the filament group (II) is larger than the average breaking elongation of filaments of the filament group (I).
Claim 4
Dependent Claim
38 words
A polyester multifilament yarn as set forth in claim 1, wherein the average denier of constituent filaments of said filament group (I) is at least equal to the average denier of constituent filaments of said filament group (II).
Claim 5
Dependent Claim
36 words
A polyester multifilament yarn as set forth in claim 1, wherein the number of constituent filaments of said filament group (I) is at most equal to the number of constituent filaments of said filament group (II).
Claim 6
Dependent Claim
38 words
A polyester multifilament yarn as set forth in claim 1, wherein the total denier De(I) of said filament group (I) and the total denier De(II) of said filament group (II) satisfy the requirement represented by the following formula:
Claim 9
Dependent Claim
147 words
A process for manufacturing a polyester multifilament yarn, which comprises: melting independently (I) a polyester selected from the group consisting of polyethylene terephthalate, polytrimethylene terephthalate and polytetramethylene terephthalate or a polymer composition comprising at least two members selected from said polyesters and (II) a polymer composition comprising a substrate composed of a polyester selected from the group consisting of polyethylene terephthalate, polytrimethylene terephthalate and polytetramethylene terephthalate or at least two members selected from said polyesters and at least one polymer selected from the group consisting of styrene type polymers, methacrylate type polymers and acrylate type polymers, which is added to said substrate in an amount of 0.4 to 8% by weight based on said substrate; extruding said polymers (I) and (II) from different extrusion holes without mingling of the polymers (I) and (II); and after cooling, doubling the extrudates without twisting and taking-up the resulting multifilament yarn.
Claim 10
Dependent Claim
147 words
A process for manufacturing a polyester multifilament yarn, which comprises: melting independently (I) a polyester selected from the group consisting of polyethylene terephthalate, polytrimethylene terephthalate and polytetramethylene terephthalate or a polymer composition comprising at least two members selected from said polyesters and (II) a polymer composition comprising a substrate composed of a polyester selected from the group consisting of polyethylene terephthalate, polytrimethylene terephthalate and polytetramethylene terephthalate or at least two members selected from said polyesters and at least one polymer selected from the group consisting of styrene type polymers, methacrylate type polymers and acrylate type polymers, which is added to said substrate in an amount of 0.4 to 8% by weight based on said substrate; extruding said polymers (I) and (II) from different extrusion holes without mingling of the polymers (I) and (II); and after cooling, doubling the extrudates without twisting and taking-up the resulting multifilament yarn.
Claim 11
Dependent Claim
23 words
A process for manufacturing a polyester multifilament yarn as set forth in claim 6, wherein the take-up speed is at least 2000 m/min.
Claim 12
Dependent Claim
54 words
A process for manufacturing a polyester multifilament yarn as set forth in claim 6 or 7, wherein the polyester of polymer composition (II) is extruded from extrusion holes arranged in the peripheral portion of a spinneret and the polymer composition (I) is extruded from extrusion holes arranged in the inner portion of said spinneret.
Claim 13
Dependent Claim
29 words
A process for manufacturing a polyester multifilament yarn as set forth in claim 6, wherein the multifilament yarn formed by doubling the extrudates is subjected to an interlacing treatment.
References Cited (Backward Citations)
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