Patent EP0030418A1 successfully refreshed from Google Patents.
EP0030418A1
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Process for producing a non-woven fabric
Assignee: Imperial Chemical Industries Ltd
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Filing: 1980-11-07
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Granted: —
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Expires: 2000-11-07
Abstract
Abstract A process for producing a non-woven fabric and fabric produced thereby, the process comprising (1) forming a stack of three or more superimposed fibrous shims, in at least one of the shims the fibres being oriented predominantly in a first direction, corresponding to the machine direction of the shim, and in at least one oftheothershims the fibres being oriented predominantly in a second direction, corresponding to the machine direction of the shim, which is inclined at an acute angle to an imaginary line which is orthogonal to the first direction, and in at least one of the other shims the fibres being oriented in a third direction, corresponding to the machine direction of the shim, which is inclined at an obtuse angle to an imaginary line which is orthogonal to the first direction, (2) bonding the fibrous shims together, (3) subjecting the bonded fabric so formed to a stentering operation in a direction orthogonal to the first direction which causes the bonded shims to expand orthogonally to the first direction and to contract in the first direction, and (4) heat setting the bonded shims while they are being stentered.
Inventors
- 👤 Alan Selwood
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 06:06
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/42; D04H1/4326; D04H1/435; D04H1/44; D04H1/50; D04H1/54; D04H1/542; D04H1/55; D04H1/559; D04H1/70; D04H1/74; D04H3/00; D04H3/02; Y; Y10; Y10T; Y10T442/00; Y10T442/60; Y10T442/643; Y10T442/659
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
187 words
A process for producing a non-woven fabric characterised by (1) forming a stack of three or more superimposed fibrous shims, in at least one of the shims the fibres being oriented predominantly in a first direction, corresponding to the machine direction of the shim and in at least one of the other shims the fibres being oriented predominantly in a second dircction, corresponding to the machine direction of the shim, which is inclined at an acute angle to an imaginary line which is orthogonal to the first direction, and in at least one of the other shims the fibres being oriented in a third direction, corresponding to the machine direction of the shim, which is inclined at an obtuse angle to an imaginary line which is orthogonal to the first direction, (2) bonding the fibrous shims together, (3) subjecting the bonded fabric so formed to a stentering operation in a direction orthogonal to the first direction which causes the bonded shims to expand orthogonally to the first direction and to contract in the first direction, and (4) heat setting the bonded shims while they are being stentered.
Claim 2
Dependent Claim
187 words
A process for producing a non-woven fabric characterised by (1) forming a stack of three or more superimposed fibrous shims, in at least one of the shims the fibres being oriented predominantly in a first direction, corresponding to the machine direction of the shim and in at least one of the other shims the fibres being oriented predominantly in a second dircction, corresponding to the machine direction of the shim, which is inclined at an acute angle to an imaginary line which is orthogonal to the first direction, and in at least one of the other shims the fibres being oriented in a third direction, corresponding to the machine direction of the shim, which is inclined at an obtuse angle to an imaginary line which is orthogonal to the first direction, (2) bonding the fibrous shims together, (3) subjecting the bonded fabric so formed to a stentering operation in a direction orthogonal to the first direction which causes the bonded shims to expand orthogonally to the first direction and to contract in the first direction, and (4) heat setting the bonded shims while they are being stentered.
Claim 3
Dependent Claim
110 words
A process for producing a non-woven fabric as claimed in Claim 1 characterised in that a stack of four or more fibrous shims are used, in the outermost shims the fibres being oriented predominantly in a first direction, corresponding to the machine direction of the fabric, in at least one of the other shims the fibres being oriented predominantly in a second direction which is inclined at an acute angle to an imaginary line which is orthogonal to the first direction and in at least one of the other shims s the fibres being oriented in a third direction which is inclined at an obtuse angle to the imaginary line.
Claim 4
Dependent Claim
37 words
A process as claimed in either Claim 1 or Claim 2 characterised in that the second direction is at an angle of between +25∘ and +65∘ to an imaginary line which is orthogonal to the first direction.
Claim 5
Dependent Claim
26 words
A process as claimed in Claim 3 characterised in that the second direction is at an angle of between +35∘ and +55∘ to the imaginary line
Claim 6
Dependent Claim
30 words
A process as claimed in either Claim 3 or Claim 4 characterised in that the third direction is at an angle of between +115∘ and 155° to the imaginary line.
Claim 7
Dependent Claim
26 words
A process as claimed in Claim 5 characterised in that the third direction is at an angle of between +125° and +145∘ to the imaginary line.
Claim 8
Dependent Claim
143 words
A heat-set, stentered, non-woven fabric characterised by a bonded stack of three or more superimposed fibrous shims, in a.t least one of the shims, prior to stentering, the fibres being oriented predominantly in a first direction, corresponding to the machine direction of the shim, and in at least one of the other shims, prior to stentering, the fibres being oriented predominantly in a second direction, corresponding to the machine direction of the shim, which is inclined at an acute angle to an imaginary line which is orthogonal to the first direction, and in at least one of the other shims, prior to stentering, the fibres being oriented in a third direction, corresponding to the machine direction of the shim, which is inclined at an obtuse angle to the imaginary line, the fabric having been stentered in a direction orthogonal to the first direction.
Claim 9
Dependent Claim
143 words
A heat-set, stentered, non-woven fabric characterised by a bonded stack of three or more superimposed fibrous shims, in a.t least one of the shims, prior to stentering, the fibres being oriented predominantly in a first direction, corresponding to the machine direction of the shim, and in at least one of the other shims, prior to stentering, the fibres being oriented predominantly in a second direction, corresponding to the machine direction of the shim, which is inclined at an acute angle to an imaginary line which is orthogonal to the first direction, and in at least one of the other shims, prior to stentering, the fibres being oriented in a third direction, corresponding to the machine direction of the shim, which is inclined at an obtuse angle to the imaginary line, the fabric having been stentered in a direction orthogonal to the first direction.
Claim 10
Dependent Claim
21 words
A non-woven fabric as claimed in Claim 7 characterised in that all of the superimposed fibrous shims are staple fibre shims.
Claim 11
Dependent Claim
21 words
A non-woven fabric as claimed in Claim 7 characterised in that all of the superimposed fibrous shims are continuous filament shims.
Claim 12
Dependent Claim
36 words
A non-woven fabric as claimed in Claim 7 characterised in that one or more of the superimposed fibrous shims are staple fibre shims and one or more of the superimposed fibrous shims are continuous filament shims.
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GB1418227A
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FR2303110A1
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US3993812A
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