Classifications

• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04B—KNITTING
  • D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
  • D04B1/14—Other fabrics or articles characterised primarily by the use of particular thread materials
  • D04B1/16—Other fabrics or articles characterised primarily by the use of particular thread materials synthetic threads
• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
  • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
  • D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
  • D01F6/62—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters

Definitions

• the invention relates to a gray dope dyed superfine fibre and the fabrics made thereof, particularly the fabric may be further deeply dyed to a desired colours by additional dyeing process during dyeing and finishing stage; and the fabric after deep dyeing shall possess not only better touch of soft and extraordinarily but also a superior quality of colour fastness to crocking, colour fastness to light and colour fastness to laundering.
• the surface area of the fibre relatively increases that causes the fibre unable to be dyed the deep colour even the amount of dyestuff used in dyeing process reaches saturation condition, or the fibre may have been dyed to deep colour but the colour fastness is poor due to failure of penetration of dyestuff into the fibre structure. Therefore presently in order to obtain better colour fastness, the conventional fabrics made of superfine fibre can only be dyed to the even light colour.
• the inherent drawbacks incurred by the method shall include the colour matching and colour mixing to the dope dyed component is extremely difficult, and if subsequently proceeding to change colour of fabric is necessary it shall be extremely difficult to ensure that no any dope dyed component is left inside the pipe although pipe line cleaning work including to drain off the waste water and flush the pipe has completely finished.
• the invention provides a fabric made of superfine yarn containing gray dope dyed component which may be further deeply dyed to different colours under lower dyestuff concentration through additional dyeing process during dyeing and finishing stage.
• the fabric of the invention so obtained has good colour fastness to crocking and colour fastness to light, and has the advantage of reducing the loss caused by spending long period of time to drain off the waste water in case of colour change.
• the major purpose of the invention is to provide a superfine yarn having neutral colour hue containing gray dope dyed component and the fabric made of the superfine yarn which mono-filament denier is within a range of 0.01 ⁇ 0.5 denier.
• the another purpose of the invention is to provide a fabric made of the gray superfine yarn of the invention may be further deeply dyed to the desired colours during dyeing and finishing stage through additional dyeing process, and particularly the fabric, after dyeing, shall possess not only a desired touch of soft and extraordinarily but also a superior colour fastness to crocking, colour fastness to light and colour fastness to laundering.
• the fabric made of the said superfine yarn containing dope dyed component carries no any other colour hue, it is much easier to do colour match when the fabric is deeply dyed to the desired colour through additional dyeing process during dyeing and finishing stage, and the gray dope dyed component can be formed by pigments or dyestuffs, but the dope dyed component formed by pigments provides better colour fastness when applied on superfine yarn.
• the percentage by weight of the gray dope dyed component added to the polymer of the present invention no specific restriction is required but it is better to choose the range from 3 ⁇ 15 % by weight in general.
• the amount of the gray dope dyed component added is less than 3 % by weight it is apt to causing colour deviation between spindles due to poor mixing effect with polymer.
• the amount of dope dyed component added exceeds 15 % by weight the spinning property and physical property shall be affected and become poor.
• the invention also imposes no specific restriction on the form of and manner for adding the dope dyed component to polymer.
• the method more popularly used for adding the dope dyed component to polymer is making the dope dyed component into the form of masterbatch, and is fed into melting machine together with polymer by employing dosing unit.
• the polymer mainly used in the invention is polyester.
• other ingredients such as Titanium dioxide, antibiotics, anti-ultraviolet ray agent or anti-flaming agent can also be added to the polymer to obtain other mechanical properties.
• the superfine fibre containing dope dyed component of the invention has mono-filament denier of 0.01 ⁇ 0.5 denier, and preferably of 0.03 ⁇ 0.5 denier.
• the fabric shall be deeply dyed to obtain deep colour with real good colour fastness without the needed of additional dyeing process by using dope dyed component to improve colour fastness.
• the fabric lacks the desired touch of soft and vibrant.
• the mono-filament denier is less than 0.01 denier, the fabric will present the desired touch of soft and vibrant, but due to over-fine fibre more amount of dope dyed component is needed for improving the colour value and colour fastness, and the spinning and physical properties of the filament will become worse that cause the product unable to be accepted by customers.
• the filament may be made of single polyester by direct spinning method, or may be made of polyester and alkali easy soluble copolymerised polyester by bi-component spinning method to form split type or sea island type superfine compound yarn and than the alkali easy soluble copolymerised polyester is removed by employing the alkali-reduction treatment method to obtain superfine polyester fibre; normally when mono-filament denier is less than 0.25 denier the method of bi-component spinning followed by alkali-reduction treatment is often adopted while taking into consideration the productivity of spinning.
• the form of the gray superfine yarn disclosed by the invention is not restricted by any specific requirement, but may be of the draw textured yarn, or full draw yarn, or air textured yarn; or the superfine yarn may be used to form differential shrinkage gray dope dyed superfine draw textured yarn or to form differential shrinkage gray superfine full draw yarn in combination with the high shrinkage yarn having a shrinkage rate of boiling water higher than 15%. Besides, if dope dyed component is added to the high shrinkage yarn having a shrinkage rate of boiling water higher than 15%, better effect is then obtained.
• the manner for carrying out the additional dying process of the fabric made of the gray superfine yarn of the invention is not restricted by any specific requirement.
• the desired colour hue and value of the fabric shall be obtained simply by adjusting the colour value of the gray dope dyed superfine yarn or by adjusting the colour chroma and value of dyestuff.
• the fabric made of the gray dope dyed yarn of the invention shall have the following properties: Table 1 Test item Test results Test method Colour fastness to laundering Colour change Over level 4 AATCC 61-2A-1989 PET Stain resistance Over level 4 AATCC 61-2A-1989 Nylon Stain resistance Over level 3 AATCC 61-2A-1989 Colour fastness to crocking Colour fastness to dry crocking Over level 4 AATCC 8-1988 Colour fastness to wet crocking Over level 3 AATCC 8-1988 Colour fastness to light Over level 3 AATCC 16E-1982 (20 hrs)
• the fabric made of the gray dope dyed superfine yarn of the invention has a colour change of colour fastness to laundering over level 4, a colour fastness to laundering with respect to PET stain resistance over level 4, and a colour fastness to laundering with respect to Nylon stain resistance over level 3 when tested with method AATCC61-2A-1989; and has a colour fastness to dry crocking over level 4, a colour fastness to wet crocking over level 3 when tested with method AATCC8-1988; as well as a colour fastness to light over level 3 when tested with method 16E -1982 (20 hrs).
• the mixture of 5 % by weight of GYAT 0610 gray masterbatch and 95 % by weight of PET polyester granules was used as island component, and the alkali easy soluble copolymerised polyester granules containing polyethylene glycol and sulfoisopathalic acid as sea component to produce gray dope dyed sea island type partially oriented yarn (POY) by means of bi-component spinning method.
• the proportion of sea to island was 30%:70%, filament winding speed is at 2500 m/s, denier of filament is 320 deniers, number of filament is 40, number of island per filament is 37.
• the differential shrinkage gray dope dyed superfine draw textured yarn was knitted into cloth by knitting, and the fabric so obtained was then treated by alkali for weight reduction to dissolve and remove the sea component completely having only the island component and high shrinkage yarn remained.
• the mono-filament denier of the island component is 0.07 dpf.
• the fabric after weight reduction, was tested for colour fastness to laundering, colour fastness to crocking and colour fastness to light directly without further additional dyeing process.
• the test results are as shown in Table 2.
• the weight reduced fabric from example 1 is dyed to red by employing additional dyeing process with dyestuff of Dianix red XF 2% under 130 ⁇ .
• the differential superfine draw textured yarn was knitted into cloth through knitting process, and the fabric so obtained was then treated by alkali for weigh reduction to dissolve and remove the sea component completely having only the island component and high shrinkage yarn remained.
• the mono-filament denier of island component is 0.07 dpf.
• the fabric of example 2 through example 4 were dyed to deep colours of red, yellow and blue through additional dyeing process during dyeing and finishing stage, and since the fabric in example 2 to 4 are carried no other colour hue, it is easier for matching the colour so that the colour fastness to laundering, colour fastness to crocking and colour fastness to light of example 2 to 4 are still as better as that shown in Table 2.
• the fabric of comparative example 1 was made of the superfine yarn containing no any gray dope dyed component through knitting which was dyed black during dyeing and finishing stage by employing additional dyeing process.
• the test results shown in Table 2 shows that the fabric had a relatively poor colour fastness to laundering, colour fastness to crocking and colour fastness to light.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
• Coloring (AREA)

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Cited By (5)

Citations (2)

• 2004
  • 2004-08-17 EP EP04019456A patent/EP1627942A1/de not_active Withdrawn

Patent Citations (2)

Non-Patent Citations (2)

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