EP0126042A2
Expired / Lapsed
EP
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Method and apparatus for dyeing cellulose fiber material
Assignee: Hoechst AG
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Filing: 1984-03-13
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Granted: —
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Expires: 2004-03-13
Abstract
Abstract Method and device for dyeing of cellulose fibre material or mixtures containing such material by means of one or several reactive dyeing agents according to the exhaust method. Alkali is added to a dye bath which includes said dyeing agents and in which the fibre material is placed. The alkali influences the fixation of the dyeing agents to the fibre material. The alkali is added continuously or substantially continuosly over a predetermined time interval progressively. The addition is started with a limited amount a time unit in an initial phase of said time interval. Thereafter the addition is increased to a largest amount a time unit in a final phase of said time interval until a certain amount necessary for the dyeing process has been added. The addition is controlled automatically following a predetermined function of time.
Inventors
- 👤 Sture Damm
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 03:54
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/58; D06P3/60; D06P3/66; D06B; D06B23/00; D06B23/20; D06B3/00; D06B3/28; D06P1/00; D06P1/0032; D06B23/205
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
144 words
Method for dyeing of cellulose fibre material or mixtures containing such material by means of one or several reactive dyeing agents according to the exhaust method by addition of an alkali to a dye bath which includes said dyeing agents and in which the fibre material is placed, said alkali influences the fixation of the dyeing agents to the fibre material, CHARACTERIZED THEREIN that said alkali is added continously or substantially continously over a pre- determined time interval progressively so, that the addition is started with a limited amount a time unit in an initial phase of said time interval and the addition thereafter is increased to a largest amount a time unit in a final phase of said time interval until a certain amount neccessary for the dyeing process has been added, said addition being controlled automatically following a predetermined function of time.
Claim 2
Dependent Claim
144 words
Method for dyeing of cellulose fibre material or mixtures containing such material by means of one or several reactive dyeing agents according to the exhaust method by addition of an alkali to a dye bath which includes said dyeing agents and in which the fibre material is placed, said alkali influences the fixation of the dyeing agents to the fibre material, CHARACTERIZED THEREIN that said alkali is added continously or substantially continously over a pre- determined time interval progressively so, that the addition is started with a limited amount a time unit in an initial phase of said time interval and the addition thereafter is increased to a largest amount a time unit in a final phase of said time interval until a certain amount neccessary for the dyeing process has been added, said addition being controlled automatically following a predetermined function of time.
Claim 3
Dependent Claim
61 words
Method according to claim 1, CHARACTERIZED BY that as alkali is preferrably utilized caustic soda, but also all other alkalies can be utilized for the fixation suitable for the fixation of reactive dye stuffs, for example sodium bicarbonate, sodium carbonate, trisodium phosphate, sodium metasilicate and also mixtures of said alkalies with each other or with alkali binding agents can be utilized.
Claim 4
Dependent Claim
43 words
Method according to claim 1 and 2, CHARACTERIZED BY that the addition of alkalies is controlled so, that the degree of fixation of the main part of the time interval, during which the alkali is added, is proportional or substantially proportional to time.
Claim 5
Independent Claim
156 words
A device for accomplishment of a method for dyeing cellulose fibre material or mixtures containing such material by means of one or several reactive dyeing agents by addition of alkali to a dye bath which includes said reactive dyeing agents and in which the fibre material is placed, said alkali influences the fixation of the dyeing agents to the material, CHARACTERIZED BY that the device includes a control unit (3) and a pump unit (4) said control unit being provided to control the pump unit for automatic progressive addition of a certain amount of the alkali as a predetermined function of time over a predetermined time interval, so that in an initial phase of said time interval a limited amount of the alkali is added a time unit, which in a final phase of said addition changes to a largest amount a time unit, until a certain amount necessary for the dyeing process has been added.
Claim 6
Independent Claim
156 words
A device for accomplishment of a method for dyeing cellulose fibre material or mixtures containing such material by means of one or several reactive dyeing agents by addition of alkali to a dye bath which includes said reactive dyeing agents and in which the fibre material is placed, said alkali influences the fixation of the dyeing agents to the material, CHARACTERIZED BY that the device includes a control unit (3) and a pump unit (4) said control unit being provided to control the pump unit for automatic progressive addition of a certain amount of the alkali as a predetermined function of time over a predetermined time interval, so that in an initial phase of said time interval a limited amount of the alkali is added a time unit, which in a final phase of said addition changes to a largest amount a time unit, until a certain amount necessary for the dyeing process has been added.
Claim 7
Dependent Claim
70 words
A device according to claim 4, CHARACTERIZED BY an addition container (6) connected to a dyeing machine known per se and an addition pump (4) for the addition of the alkali to the dye bath and an electronic control device (3) for the control of the addition pump following a predetermined programme, said pump being a reciprocating piston pump which is controlled with respect to length of strokes and frequency.
References Cited (Backward Citations)
GB1458623A
Cited
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