Patent EP0301874B1 successfully refreshed from Google Patents.
EP0301874B1
Expired / Lapsed
EP
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Cellulosic fibre
Assignee: Akzo Nobel UK PLC
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Filing: 1988-07-29
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Granted: 1992-06-17
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Expires: 2008-07-29
Abstract
No abstract record available.
Inventors
- 👤 Andrew George Wilkes
- 👤 Alan John Bartholomew
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 12:41
CPC Classifications
D; D01; D01F; D01F2/00; D01F2/06; A; A61; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/28; D01D; D01D5/00; D01D5/253; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2904; Y10T428/2913; Y10T428/2933; Y10T428/2964; Y10T428/2965; Y10T428/2973; Y10T428/2978
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
98 words
A method for the production of solid cellulosic regenerated viscose staple fibre of multi-limbed cross section having at least three limbs in which viscose is extruded through multi-limbed extrusion holes having similar shapes to the shape of the filaments into a regenerating bath to regenerate cellulose filaments in which each limb of the filaments has an aspect ratio greater than 2:1 and which are then stretched, characterised in that after stretching the filaments are cut to form staple fibre which is then washed and dried and which staple fibre has a decitex in the range 0.5 to 5.
Claim 2
Independent Claim
17 words
A method as claimed in claim l further characterised in that the fibre is standard viscose fibre.
Claim 3
Dependent Claim
37 words
A method as claimed in claim 2, further characterised in that the regenerating bath contains 0.5% to 2% by weight zinc sulphate, 60% to 20% by weight sulphuric acid and 10 to 28% by weight sodium sulphate.
Claim 4
Independent Claim
21 words
A method as claimed in any one of claims 1 to 3, further characterised in that the viscose incorporates a modifier.
Claim 5
Dependent Claim
17 words
A method as claimed in claim 4, further characterised in that the modifier is a polyethylene glycol.
Claim 6
Independent Claim
31 words
A method as claimed in any one of claims 1 to 5, further characterised in that each limb of the filaments has an aspect ratio in the range 2:1 to 7:1.
Claim 7
Dependent Claim
26 words
A method as claimed in claim 6, further characterised in that each limb of the filaments has an aspect ratio in the range 3:1 to 5:1.
Claim 8
Independent Claim
26 words
A method according to any one of claims 1 to 7, further characterised in that the fibre has a decitex in the range 1.5 to 4.
Claim 9
Dependent Claim
63 words
Cellulosic regenerated viscose staple fibre characterised in that it consists of a plurality of solid cut filaments each having a decitex in the range 0.5 to 5 and a multi-limbed cross-section having at least three limbs, each limb having a limb length-to-width aspect ratio in the range 2:1 to 10:1, and substantially all of the cut filaments having substantially the same cross-sectional shape.
Claim 10
Dependent Claim
17 words
Staple fibre according to claim 9, further characterised in that the filaments have three or four limbs.
Claim 11
Dependent Claim
25 words
Staple fibre according to claim 10, further characterised in that the filaments have three limbs disposed substantially at an angle of 120° to each other.
Claim 12
Dependent Claim
26 words
Staple fibre according to any one of claims 9 to 11, further characterised in that the filaments have a decitex in the range 1.5 to 4.
Claim 13
Dependent Claim
30 words
Staple fibre according to any one of claims 9 to 12, further characterised in that each limb of the filaments has an aspect ratio in the range 2:1 to 7:1.
Claim 14
Dependent Claim
25 words
Staple fibre according to claim 13, further characterised in that each limb of the filaments has an aspect ratio in the range 3:1 to 5:1.
Claim 15
Dependent Claim
23 words
A tampon characterised in that it includes solid cellulosic regenerated viscose staple fibre as claimed in any one of claims 9 to 14.
Claim 16
Dependent Claim
59 words
A tampon as claimed in claim 15, further characterised in that when manufactured as a longitudinally expanding tampon having a stability of approximately 15mm as measured by the 'expansion test' as hereinbefore defined, it has an absorbency of at least 4.3 grams 1% saline solution per gram of fibre as measured by a 'modified Syngina' test as hereinbefore defined.
Claim 17
Dependent Claim
27 words
A tampon as claimed in claim 16, further characterised in that it has an absorbency of at least 4.5 grams 1% saline solution per gram of fibre.
Claim 18
Dependent Claim
61 words
A tampon as claimed in claim 15, further characterised in that when manufactured as a radially expanding tampon having a stability of at least 3.2 daN as measured by the crush test as hereinbefore defined, it has an absorbency of at least 4.5 grams 1% saline solution per gram of fibre as measured by a 'modified Syngina' test as hereinbefore defined.
Claim 19
Dependent Claim
27 words
A tampon as claimed in claim 18, further characterised in that it has an absorbency of at least 5.0 grams 1% saline solution per gram of fibre.
Claim 20
Dependent Claim
25 words
A tampon as claimed in any one of claims 15 to 19, further characterised in that the tampon incorporates fibres of other shape or material.
Claim 21
Dependent Claim
17 words
A tampon as claimed in claim 20, further characterised in that the other fibres are cellulosic fibres.
Claim 22
Dependent Claim
20 words
A tampon as claimed in claim 21, further characterised in that the other fibres are standard viscose fibre or cotton.
Claim 23
Dependent Claim
17 words
A tampon as claimed in claim 20, further characterised in that the other fibres are polyester fibre.
Claim 24
Dependent Claim
25 words
A tampon as claimed in any one of claims 15 to 24, further characterised in that it contains fibre of two or more cross sections.
Claim 25
Dependent Claim
28 words
A textile article characterised in that it incorporates solid cellulosic regenerated viscose staple fibre of multi-limbed cross section as claimed in any one of claims 9 to 14.
Claim 26
Dependent Claim
19 words
A textile article as claimed in claim 25, further characterised in that it is in woven or knitted form.
Claim 27
Dependent Claim
18 words
A textile article as claimed in claim 25, further characterised in that it is in non-woven fabric form.
Claim 28
Dependent Claim
24 words
A textile article as claimed in any one of claims 25 to 27, further characterised in that the article further incorporates other cellulosic fibre.
Claim 29
Dependent Claim
21 words
A textile article as claimed in claim 28, further characterised in that the other cellulosic fibre is or contains viscose fibre.
Claim 30
Dependent Claim
20 words
A textile article as claimed in claim 28 further characterised in that the other cellulosic fibre is or contains cotton.
Claim 31
Dependent Claim
26 words
A textile article as claimed in any one of claims 25 to 30, further characterised in that the article further incorporates fibres of a non-cellulosic material.
Claim 32
Dependent Claim
18 words
A textile article as claimed in claim 31, further characterised in that the non-cellulosic material is a polyester.
References Cited (Backward Citations)
No citation records indexed.
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