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EP0315725B1 - Method of dyeing woollen fabrics and items of clothing to produce a shot effect - Google Patents

Method of dyeing woollen fabrics and items of clothing to produce a shot effect Download PDF

Info

Publication number
EP0315725B1
EP0315725B1 EP19870830398 EP87830398A EP0315725B1 EP 0315725 B1 EP0315725 B1 EP 0315725B1 EP 19870830398 EP19870830398 EP 19870830398 EP 87830398 A EP87830398 A EP 87830398A EP 0315725 B1 EP0315725 B1 EP 0315725B1
Authority
EP
European Patent Office
Prior art keywords
products
bath
dyeing
vat
water
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP19870830398
Other languages
German (de)
French (fr)
Other versions
EP0315725A1 (en
Inventor
Alessandro Silli
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SILLI Alessandro
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to EP19870830398 priority Critical patent/EP0315725B1/en
Priority to DE8787830398T priority patent/DE3779127D1/en
Priority to PCT/IT1988/000017 priority patent/WO1989004393A1/en
Priority to AU13927/88A priority patent/AU1392788A/en
Publication of EP0315725A1 publication Critical patent/EP0315725A1/en
Application granted granted Critical
Publication of EP0315725B1 publication Critical patent/EP0315725B1/en
Expired legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
    • D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P3/00—Special processes of dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form, classified according to the material treated
    • D06P3/02—Material containing basic nitrogen
    • D06P3/04—Material containing basic nitrogen containing amide groups
    • D06P3/14—Wool

Definitions

  • the invention concerns a method of dyeing shot woollen fabrics and items of clothing, hereinafter called “the products” for short.
  • the aim of the present invention is to dye the products in such a way as to produce a shot effect which causes the colour of the products themselves to change when viewed from different angles, in accordance with she varying angle of incidence of the light rays.
  • the method as claimed below achieves this shot effect by dyeing or colouring the fibres of the product fabric, and not the surface filaments of the fibres themselves.
  • the sad filaments retain a natural white sheen and form a downy "nap" which hides the true colour of the woven fibres from view and creates different colour effects depending on the angle from which the products are viewed.
  • the method consists in dyeing the products in two stages, first in water in a rotary dyeing vat, without fixing the dye to the fabric, followed by rinsing, and then placing the products in a second bath, again with the dyeing vat in motion, in order to fix the dye with an elastomer activated by a catalyst.
  • the products are dry cleaned before undergoing the dyeing treatment, and are placed in a rotary dyeing vat in a bath of purified water in the ratio of 40 litres of water to every 1 kg of product. Size, is added to the bath in the proportion of 10% of the weight of the products to be dyed.
  • the dyeing vat is made to rotate and heated to a temperature of 50°C, allowing it to continue rotating for 30 minutes.
  • Colorant is then added to the bath in variable proportions, depending on the desired colour intensity to be achieved, diluted with a dispersing agent.
  • the dyeing vat is further heated to a temperature of 95°C and allowed to continue rotating for 60 minutes.
  • the dyebath is cooled to 50°C, the vat drained of the dyeing solution and the products rinsed.
  • the second stage consists in fixing the dye to the products treated in the previous stage.
  • the products are placed in a bath of clean water, again with the dyeing vat in motion, to which an elastomer is added.
  • the proportion of elastomer for the fixing bath is 10% of the amount of water used.
  • the colorant that had settled on the surface filaments of the product fibres comes off the said filaments and settles on the body of the said fibres.
  • a catalyst is added to the bath in order to activate the binding action of the elastomer and, consequently, to fix the dye to the product fibres.
  • the ideal proportion of catalyst to obtain this pH was found to be 1% of the amount of water for the fixing bath. The products are allowed to remain in this bath, with the dyeing vat in motion, for 30 minutes.
  • the dyeing vat is drained, the products rinsed (if there are any impurities to be removed), together with a softening agent, if necessary, and finally dried, at 140°C and transferred to subsequent processes.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Coloring (AREA)

Description

  • The invention concerns a method of dyeing shot woollen fabrics and items of clothing, hereinafter called "the products" for short.
  • The aim of the present invention is to dye the products in such a way as to produce a shot effect which causes the colour of the products themselves to change when viewed from different angles, in accordance with she varying angle of incidence of the light rays.
  • The method as claimed below achieves this shot effect by dyeing or colouring the fibres of the product fabric, and not the surface filaments of the fibres themselves. At the end of the dyeing process, the sad filaments retain a natural white sheen and form a downy "nap" which hides the true colour of the woven fibres from view and creates different colour effects depending on the angle from which the products are viewed.
  • Basically, the method consists in dyeing the products in two stages, first in water in a rotary dyeing vat, without fixing the dye to the fabric, followed by rinsing, and then placing the products in a second bath, again with the dyeing vat in motion, in order to fix the dye with an elastomer activated by a catalyst.
  • The two basic stages of the method are described in more detail below.
  • First of all, the products are dry cleaned before undergoing the dyeing treatment, and are placed in a rotary dyeing vat in a bath of purified water in the ratio of 40 litres of water to every 1 kg of product. Size, is added to the bath in the proportion of 10% of the weight of the products to be dyed. The dyeing vat is made to rotate and heated to a temperature of 50°C, allowing it to continue rotating for 30 minutes.
  • Colorant is then added to the bath in variable proportions, depending on the desired colour intensity to be achieved, diluted with a dispersing agent. The dyeing vat is further heated to a temperature of 95°C and allowed to continue rotating for 60 minutes.
  • At the end of the first stage envisaged by the present method, the dyebath is cooled to 50°C, the vat drained of the dyeing solution and the products rinsed.
  • The second stage consists in fixing the dye to the products treated in the previous stage.
  • To do this, the products are placed in a bath of clean water, again with the dyeing vat in motion, to which an elastomer is added. The proportion of elastomer for the fixing bath is 10% of the amount of water used.
  • During rinsing and during the bath with the elastomeric bonding agent, the colorant that had settled on the surface filaments of the product fibres comes off the said filaments and settles on the body of the said fibres.
  • Subsequently, a catalyst is added to the bath in order to activate the binding action of the elastomer and, consequently, to fix the dye to the product fibres. During experiments on the method, the ideal proportion of catalyst to obtain this pH was found to be 1% of the amount of water for the fixing bath. The products are allowed to remain in this bath, with the dyeing vat in motion, for 30 minutes.
  • At the end of the second stage, the dyeing vat is drained, the products rinsed (if there are any impurities to be removed), together with a softening agent, if necessary, and finally dried, at 140°C and transferred to subsequent processes.

Claims (1)

  1. A method of dyeing shot woolen fabrics and items of clothing which may be implemented using a rotary dyeing tank, colorants and bonding agents to fix the colorants to the fibres of the products to be dyed, the said method being characterized by the following stages:
    a) dyeing the products which have been first drycleaned in a bath of water in a ratio of 40 litres of water to every 1 kg of product, adding to the bath in successive steps firstly a size in a ratio of 10% of the weight of the products, heating the vat to a temperature of 50°C and making it rotate for 30 minutes, and adding secondly a colorant diluted in a dispersing agent and then heating the vat to 95°C and making it rotate for a further 60 minutes;
    b) cooling the vat to 50°C, with the vat rotating, and rinsing the treated products; placing the products, treated according to step a), in a bath of clean water, adding to the bath an elastomer in the proportion of 10% of the amount of water used, subsequently activating the elastomer by adding a catalyst to the bath in the proportion of 1% of the amount of water used, and allowing the dyeing vat to rotate for a further 30 minutes; rinsing the products, which are then centrifuged and thoroughly dried at 140° C.
EP19870830398 1987-11-11 1987-11-11 Method of dyeing woollen fabrics and items of clothing to produce a shot effect Expired EP0315725B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP19870830398 EP0315725B1 (en) 1987-11-11 1987-11-11 Method of dyeing woollen fabrics and items of clothing to produce a shot effect
DE8787830398T DE3779127D1 (en) 1987-11-11 1987-11-11 COLORING METHOD FOR PRODUCING CHANGING WOOL PIECES.
PCT/IT1988/000017 WO1989004393A1 (en) 1987-11-11 1988-03-03 Changing colouring treatment for woollen clothing pieces
AU13927/88A AU1392788A (en) 1987-11-11 1988-03-03 Changing colouring treatment for woollen clothing pieces

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19870830398 EP0315725B1 (en) 1987-11-11 1987-11-11 Method of dyeing woollen fabrics and items of clothing to produce a shot effect

Publications (2)

Publication Number Publication Date
EP0315725A1 EP0315725A1 (en) 1989-05-17
EP0315725B1 true EP0315725B1 (en) 1992-05-13

Family

ID=8198465

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870830398 Expired EP0315725B1 (en) 1987-11-11 1987-11-11 Method of dyeing woollen fabrics and items of clothing to produce a shot effect

Country Status (4)

Country Link
EP (1) EP0315725B1 (en)
AU (1) AU1392788A (en)
DE (1) DE3779127D1 (en)
WO (1) WO1989004393A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0417040A1 (en) * 1989-09-06 1991-03-13 Ciba-Geigy Ag Dyeing process for wool
US5032141A (en) * 1990-04-10 1991-07-16 R. Silli, S.P.A. Changing coloring treatment for woolen and mixed wool clothing pieces
AU655125B2 (en) * 1992-10-23 1994-12-01 Woollen Twine Products Pty Ltd Woollen chord having removable colouring

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB211178A (en) * 1922-09-13 1924-02-13 Hermann Plauson Improvements in dyeing
GB1124344A (en) * 1964-09-04 1968-08-21 Iws Nominee Co Ltd A method of setting and dyeing woollen textile material
AU444066B2 (en) * 1971-02-11 1973-12-20 Commonwealth Scientific And Industrial Research Organization Method of dyeing keratinous fibres with pigments

Also Published As

Publication number Publication date
AU1392788A (en) 1989-06-01
DE3779127D1 (en) 1992-06-17
EP0315725A1 (en) 1989-05-17
WO1989004393A1 (en) 1989-05-18

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