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
  • D06P1/445—Use of auxiliary substances before, during or after dyeing or printing
• • 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
  • D06P1/0032—Determining dye recipes and dyeing parameters; Colour matching or monitoring
• • 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
  • D06P3/58—Material containing hydroxyl groups
  • D06P3/60—Natural or regenerated cellulose
  • D06P3/66—Natural or regenerated cellulose using reactive dyes
• • 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
  • D06P7/00—Dyeing or printing processes combined with mechanical treatment
  • D06P7/005—Dyeing combined with texturising or drawing treatments

Definitions

• the present invention relates to cloth dyeing technical field, in particular, a process for dyeing ramie slivers.
• Ramie is a fiber crop having good quality, high yield and characteristic of China, and the gross output of ramie in China occupies 90% of that of the world.
• Ramie fiber has the advantageous features of strong hydroscopicity, fast heat dissipation, corrosion resistance and bacterial inhibition, soft luster, recyclability, environmental friendliness and the like, as well as excellent wearability.
• ramie is used more and more, mainly for manufacturing ramie cloth, such as Chinese linen.
• dyeing of ramie mainly lies in ramie yarn dyeing and stock (refined dry flax) dyeing, both of which have succeeded.
• the style of the colored fabric weaved with the dyed ramie yarns is relatively fixed, and dyeing of refined dry flax has a low yield, resulting in severe waste.
• the existing ramie sliver dyeing technology generally uses the top dyeing technique conventional in wool or cotton spinning industry; moreover, the dyed fiber slivers are likely to break in coalescing and drawing, and the fibers are likely to harden due to no curling and poor cohesion of ramie fibers, readily leading to poor drawing, needle breakage and missing stitches during carding and coalescing in post-procedures, thus it is difficult to spin smoothly.
• the present invention provides a process for dyeing ramie slivers, by which the ramie slivers dyed is not liable to break and harden and enables smooth yarn spinning.
• the invention provides the following technical solution: a process for dyeing ramie slivers, comprising
• the dyeing in step 2) comprises the following process: adding ramie slivers to a dissolved active dye at atmospheric temperature, stirring for 5-10min; adding a salt solution, increasing temperature to 60°C-70°C, running for 5-8min, adding sodium carbonate solution, and running for 40-60min while holding the temperature; taking the ramie slivers out, and sequentially performing washing with clear water, neutralizing with diluted acid, soaping, and washing with cold water.
• the dyeing process further comprises 3) post-treatment: subjecting the dyed ramie slivers to color fixing and oiling.
• Said color fixing is carried out by immersing ramie slivers in an aqueous solution containing 2-4% (o.w.f) of a color fixing agent and 2-5% (o.w.f) of a softener at 35°C-50°C for 10-20min;
• Said oiling is carried out by immersing the color-fixed ramie slivers in an aqueous solution containing 2-3g/L of an oil agent at 60°C-70°C for 20-30min.
• said soaping is carried out by washing the ramie slivers in a solution of 1-2g/L of detergent at 90°C-100°C for 10-15min.
• the ramie slivers in step 1) are set to have a coiler shape.
• the present invention further provides a preparation method of ramie spun yarn, and the technical solution thereof is as follows: a method for preparing ramie colored-spun yarn, comprising the following steps:
• drying in step (5) is required to achieve a moisture regain of 7-10% and an oil content of 0.5-1.5%.
• the ramie sliver used for spinning yarn in step (7) has at least one color.
• ramie fibers are firstly made into ramie balls having a coiler shape and certain weight, subsequently bagged, caged and hoisted to a yarn dyeing machine for dyeing.
• the dyeing process involves steaming ramie balls with a steaming liquor containing a penetrant and then dyeing.
• it is further needed to perform oiling treatment for improving spinnability to the dyed ramie fibers, followed by dewatering and drying, thereby preparing colored ramie fiber slivers meeting the requirements of spinning process.
• the colored ramie fiber slivers are then subjected to fiber loosening, coalescing and drawing, and spun after combing.
• the colored ramie fiber slivers can be spun solely or blend-spun with other weaving fibers to obtain ramie or its blend yarns having different characteristics and different colors.
• the dyed ramie slivers in the present invention improves the properties of ramie fibers, such that the ramie fibers are not liable to break in coalescing and drawing; and the ramie fibers are not liable to harden, avoiding poor drawing, needle breakage and missing stitches during carding and coalescing in post-procedures, thus achieving the purpose of smooth yarn spinning.
• the preparation method of ramie spun yarn according to the present invention effectively solves the technical problem in production of ramie sliver colored-spun yarn, and facilitates diversity of product and increase of added value of ramie product to thereby obtain higher economic benefit.
• Colorful ramie products having different elements can be prepared by the preparation process and method according to the present invention.
• a preparation method of ramie spun yarn comprising the following steps:
• a suspended cage capable of holding ramie balls is designed taking the advantages of AUwin series dyeing vessels produced by Fong's National Engineering Co., Ltd., and placed into the dyeing vessel for dyeing.
• the AUwin series dyeing vessels produced by Fong's National Engineering Co., Ltd. have the advantages of energy saving, high efficiency, ability of pressure dewatering, and possession of AIR advanced intelligent washing system.
• the ramie sliver dyeing process comprises the following process flow: pretreatment->dyeing->post-treatment;
• the pretreatment is for the purpose of removing the small quantity of oil and other aids attached on the ramie slivers, which is beneficial to fiber coloring and capable of guaranteeing the dyeing performance of the fibers.
• Dissolved dye is added at atmospheric temperature, followed by running for 5min; dissolved salt is added and then temperature is increased to 60°C, followed by running for 5 min; dissolved sodium carbonate is added, followed by running for 40-60min while holding the temperature at 60°C, and then a sample is taken. The color is checked. If the color is correct, water is discharged, and washing with clear water is conducted once for 5min; subsequently, glacial acetic acid is added for neutralization (HAC 2-4g/l), and water is discharged after running at atmospheric temperature for 5 min.
• Soaping is performed once (detergent 1-2g/l, temperature 90-100°C, time 10min), then water washing and overflow water washing are carried out sequentially, followed by washing with 80°C water once for 5min (washing with hot water is performed again if the color is very deep) and washing with cold water for 1-2 times each for 5min.
• Lubrication treatment is carried out (color fixing agent is added if the color is deep) at 40°C for 10min, and then water is discharged out of the cage.
• the rates of temperature increase and decrease are set to be the fastest, expect for that the rate of temperature increase in dyeing is controlled at 2°C/min, so that the retention time of the ramie balls in the dyeing vessels is shortened as much as possible, and the impact of liquid flow on the ramie balls is reduced, thereby avoiding tangle.
• the dyes having low substantivity and better migrating property should be used.
• the dyes and aids should be substantially dissolved before addition. Feed speed should be controlled severely, and dye is fed at a speed of 50% for 10min; and the aids are fed at a speed of 70% for 5min. Dyeing is performed for 40-60min with rate of temperature increase controlled at 2°C/min. Bidirectional circulation is adopted in dyeing, comprising external flow at a pump speed of 60% for 2min and internal flow at a pump speed of 90% for 4min, and internal-flow starting is adopted.
• post-treatment is to fix color for improving color fastness of dyeing and to oil for enabling smooth carding.
• Post-treatment is performed under the environment bidirectional flow comprising internal flow at a pump speed of 80% for 4min and external flow at a pump speed of 40% for 1min.
• Example 1 production of 24Nm coffee-colored ramie knitting yarn
• Dissolved dye was added at atmospheric temperature, followed by running for 5min; dissolved salt was added and then temperature was increased to 60°C, followed by running for 5 min; dissolved sodium carbonate was added, followed by running for 40-60min while holding the temperature at 60°C. The color is checked, if the color was correct, water was discharged, and washing with clear water was conducted once for 5min; subsequently, glacial acetic acid was added for neutralization (HAC 2-4g/l), and water was discharged after running at atmospheric temperature for 5min.
• Soaping was performed once (detergent 1-2g/l, temperature 90-100°C, time 10min), then water washing and overflow water washing were carried out sequentially, followed by washing with 80°C water once for 5min (washing with hot water was performed again if the color was very deep) and washing with cold water for 1-2 times each for 5min.
• Lubrication treatment was carried out (color fixing agent was added if the color was deep) at 40°C for 10min, and then water was discharged out of the cage.
• the finally produced ramie yarns were detected.
• the yarns have the features of soft luster, cleanness, less hairiness, etc., and are suitable for use in woven or knitted ramie products.
• Example 2 production of 60Nm ramie-viscose gray spun yarn (30% ramie/70% viscose)
• ramie fiber slivers were dyed, and then prepared into blend colored-spun yarns having unique style by using a ramie spinning apparatus.
• the obtained yarns have unique style and good luster, and can lead the fashion trend of ramie textiles; meanwhile, they enable enrichment of ramie textile products and added value increase of the products.

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Coloring (AREA)
• Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

Applications Claiming Priority (2)

Publications (3)

Family

ID=45103469

Family Applications (1)

Country Status (5)

Families Citing this family (9)

Family Cites Families (23)

• 2011
  • 2011-06-29 CN CN2011101796946A patent/CN102277755B/zh active Active
  • 2011-11-15 JP JP2013545019A patent/JP2014502677A/ja active Pending
  • 2011-11-15 US US13/993,993 patent/US20130269123A1/en not_active Abandoned
  • 2011-11-15 EP EP11868514.8A patent/EP2728065A4/fr not_active Withdrawn
  • 2011-11-15 WO PCT/CN2011/082224 patent/WO2013000232A1/fr active Application Filing

Also Published As

Similar Documents

Legal Events