EP0052897A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
A sized multifilament yarn of an aromatic polyamide, a yarn package, a woven fabric and a process for making said yarn
Assignee: Akzo NV
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Filing: 1981-10-28
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Granted: —
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Expires: 2001-10-28
Abstract
Abstract A multifilament yarn of an aromatic polyamide, in particular poly-p-phenylene terephthalamide, having a tenacity of at least 15 cN/dtex and an initial modulus of at least 400 cN/dtex is provided with a water-soluble size, the filaments of the yarn having a cohesion corresponding to a Manra number not higher than 40. The yarn is made by subjecting a non-sized yarn having a moisture content which is lower than its equilibrium moisture content, while under a tension of at most 0.25 cN/dtex, to a continuous wetting treatment with an aqueous solution of a size and subsequently winding the treated yarn into a yarn package. The yarn package contains a single continuous length of the sized yarn. The sized yarn is suitable as warp and weft yarn in the weaving industry.
Inventors
- 👤 Evert Harteman
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 07:24
CPC Classifications
D; D02; D02G; D02G3/00; D02G3/22; D02G3/40; D02G3/404; D02G3/406; D01; D01F; D01F6/00; D01F6/58; D01F6/60; D01F6/605; D06; D06B; D06B21/00; D06M; D06M13/00; D06M13/52; D06M15/00; D06M15/19; D06M15/195; D06M15/37; D06M15/507; D06M15/70; D06M23/00; D06M23/06; D10; D10B; D10B2331/00; D10B2331/02; D10B2331/021; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/2969; Y10T442/00; Y10T442/30; Y10T442/3049; Y10T442/3057
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
53 words
A multifilament yarn of an aromatic polyamide having a tenacity of at least 15 cN/dtex and an initial modulus of at least 400 cN/dtex, characterized in that the yarn is provided with a water-soluble size and the filaments of the yarn have a cohesion corresponding to a Manra number not higher than 40.
Claim 2
Dependent Claim
53 words
A multifilament yarn of an aromatic polyamide having a tenacity of at least 15 cN/dtex and an initial modulus of at least 400 cN/dtex, characterized in that the yarn is provided with a water-soluble size and the filaments of the yarn have a cohesion corresponding to a Manra number not higher than 40.
Claim 3
Dependent Claim
17 words
A yarn according to claim 1, characterized in that it entirely or substantially consists of poly-p-phenylene terephthalamide.
Claim 4
Dependent Claim
22 words
A yarn according to claim 1 and/or 2, characterized in that the Manra number of the yarn is not higher than 20.
Claim 5
Dependent Claim
23 words
A yarn according to one or more of the claims 1 through 3, characterized in that the yarn is substantially free from twist.
Claim 6
Dependent Claim
22 words
A yarn according to one or more of the claims 1 through 4, characterized in that the size is a film-forming polymer.
Claim 7
Dependent Claim
32 words
6 . A yarn according to claim 5, characterized in that the size is a polyester derived from at least a dicarboxylic acid, at least a diol and a sulphonated dicarboxylic acid.
Claim 8
Dependent Claim
24 words
A yarn according to claim 6, characterized in that. the size is a polyester derived from isophthalic acid, diethylene glycol and sulphonated isophthalic acid.
Claim 9
Dependent Claim
26 words
A yarn according to one or more of the claims 1 through 7, characterized in that the yarn has a size content of 0,5-10% by weight.
Claim 10
Dependent Claim
27 words
A yarn according to one or more of the claims 1 through 8, characterized in that the yarn also contains 0,5-15% by weight of a non-ionic wax.
Claim 11
Dependent Claim
32 words
A yarn according to claim 9, characterized in that the non-ionic wax consists of a triglyceride of a fatty acid having 1 8 carbon atoms and containing 6 to 10 epoxy groups.
Claim 12
Dependent Claim
19 words
A yarn according to one or more of the claims 1 through.10, characterized in that the yarn is tangled.
Claim 13
Dependent Claim
31 words
A yarn according to one or more of the claims 1 through 11, characterized in that the yarn has a linear density of tex 1-1000 and is composed of 10-5000 filaments.
Claim 14
Dependent Claim
24 words
A yarn according to claim- 12, characterized in that the yarn has a linear density of tex 5-200 and is composed of 100-2000 filaments.
Claim 15
Dependent Claim
27 words
A yarn package, characterized in that it contains a single continuous length of sized multifilament yarn according to one or more of the claims 1 through 13.
Claim 16
Dependent Claim
18 words
A yarn package according to claim 14, for use as weft in the manufacture of a woven fabric.
Claim 17
Dependent Claim
18 words
A yarn package according to claim 14, for use as warp in the manufacture of a woven fabric.
Claim 18
Dependent Claim
27 words
A woven fabric in which the warp and the weft threads are formed by a yarn according to one or more of the claims 1 through 13.
Claim 19
Dependent Claim
93 words
A process for the manufacture of a yarn according to one or more of the claims 1 through 13, characterized in that a multifilament yarn of an aromatic polyamide having a tenacity of at least 15 cN/dtex, an initial modulus of at least 400 cN/dtex and a moisture content which is lower than the equilibrium moisture content of the yarn is subjected, while under a tension of at most 0,25 cN/dtex, to a continuous wetting treatment with an aqueous solution of a size and the yarn is subsequently wound into a yarn package.
Claim 20
Dependent Claim
96 words
A process according to claim 18, characterized in that a substantially twistless yarn of poly - p-phenylene terephthalamide is successively passed over a feed roll and a hot roll heated to a temperature of 300° to 500°C, with the yarn tension between the feed roll and the hot roll being at least 0,5 cN/dtex, but below the value at which the single filaments break, and subsequently over a non-heated discharge roll, after which the yarn is wetted with an aqueous solution of the size by means of a rotating applicator roll, followed by winding the yarn.
Claim 21
Dependent Claim
32 words
A process according to claim 19, characterized in that the yarn passes over the applicator roll via an annular groove provided in the surface thereof, which groove has a substantially rectangular cross-section.
Claim 22
Dependent Claim
44 words
A process according to one or more of the claims 18 through 20, characterized in that the size is applied as a 20 to 40 per cent by weight aqueous solution of a polyester derived from isophthalic acid, diethylene glycol and sulphonated isophthalic acid.
Claim 23
Dependent Claim
25 words
A process according to one or more of the claims 18 through 21, characterized in that before the size is applied, the yarn is tangled.
Claim 24
Dependent Claim
38 words
2 3. A process according to one or more of the claims 19 through 22, characterized in that after the size is applied, the yarn is provided with a non-ionic wax with the aid of an applicator roll.
References Cited (Backward Citations)
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