JPS61119784A - Dyeing of fiber structure - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for dyeing a fiber structure made of recycled cellulose fibers and wool.

(Prior art) uA fibrous structure made of regenerated cellulose fibers and wool;
(2) For example, when dyeing with p (6), wool is dyed, but recycled cellulose fibers are not dyed. In addition, recycled cellulose fibers are usually dyed with alkaline reactive dyes, but when the fiber structure is dyed using a normal dyeing method, wool is difficult to dye and also has the disadvantage that it cannot be dyed to the same color.

In particular, when dyeing dark colors such as black, dark blue, and dark red, simultaneous dyeing in one bath with reactive dyes is considered difficult, and the dyeing of fiber structures made of recycled cellulose fibers and wool is carried out by - two-bath method or A two-bath dyeing method is needed.

(Problems to be Solved by the Invention) When dyeing a fiber structure made of recycled cellulose fibers and wool, the two-bath and two-bath dyeing methods are complicated in operation;
This results in an increase in dyeing costs. -In the unlikely event that the bath simultaneous staining method is
Although it reduces dyeing costs, it has the disadvantage that it cannot be dyed in deep colors such as black, dark blue, and dark red. An object of the present invention is to provide a method for simultaneous dyeing of the fiber structure in one bath.

(Means for Solving the Problems) The method of the present invention involves pre-treating with an alkaline aqueous solution having a pFI of 9 to 11 degrees, preferably a pH of 9 to 10, when dyeing a fiber structure made of recycled cellulose fibers and wool. The fiber structure is dyed after the solubility in N/1ONaOH71 (solubility in solution is 1 to 4%, preferably 1 to 2%) and biμV water absorption is 10 to 181, preferably 11 to 12 cW4. The recycled 1a fine filament applied to the present invention may be either viscose process rayon or copper ammonia process rayon.The fiber structure made of recycled cellulose fiber and wool can be made of these blended yarns and Examples include woven and knitted fabrics made of the same, intertwisted yarns of yarns made of recycled cellulose fibers and wool yarn, interwoven fabrics, interwoven knitted fabrics, etc. The mixing ratio of recycled W4 cellulose fibers and wool is usually 50-97% fine, 50-8% wool, preferably 70-95% recycled cellulose fiber, 80-6% wool.
It is.

Furthermore, in the present invention, examples of the alkaline aqueous solution used include aqueous solutions of sodium hydroxide, sodium carbonate, sodium phosphate, or ammonia, which may be used alone or in combination. It can also be used in combination with hydrogen peroxide. The pH of the alkaline aqueous solution is adjusted to 9-11, preferably 9-10, and the temperature is usually 60-95°C.
It is preferably heated at 60 to 80°C for 80 to 60 minutes.

The concentration of coexisting hydrogen peroxide is O to 50 g/l, preferably 10 g/l or less. As a processing method, a cold batch method may be used.

The pretreated fiber structure is colored by dyeing, and reactive dyes for cellulose and direct dyeing thren dyes can be used, and methods include exhaustion method, padding method, cold patch method, etc. can be applied, and the commonly used dyeing method for cellulose fibers can be used as is.

Generally, when pre-treated with an alkaline aqueous solution having a pET of less than 8-9, the wool becomes less brittle, but when dyed in this pH range, it does not show the same color.

When the wool is pretreated and dyed with an alkaline aqueous solution with a pH exceeding 11, it exhibits the same color property, but the wool becomes brittle and its texture becomes noticeably hardened.

It goes without saying that the texture changes in various ways depending on the combination of p'EI of the alkaline aqueous solution and temperature during pretreatment, but the N/1ONaOHfII of the pretreated fiber structure
The solubility is 1 to 4%, preferably 1 to 2%, and the pisic method water absorption is 10 to 181, preferably 11 to 12clI, in which the same color property and hand feel are good.

(Effect of the invention) The present invention is a dyeing method that is commonly used not only for light colors and medium colors, but also for dark colors such as black, dark blue, and dark red, which had the disadvantage of not being dyed in the same color. It can be dyed, has less brittleness, and has a good texture.

Such an effect can be obtained by treating with an alkaline aqueous solution under specific conditions and increasing the solubility in an N/1ONaOH aqueous solution from 1 to 1.
4%, preferably 1-2% and bisic method water absorption of 1
It can only be obtained by coloring a fiber structure with 0 to 18 α, preferably 11 to 12α, and its industrial utility value is great.

(Example) The present invention will be specifically explained below with reference to Examples.

In addition, strength, whiteness, alkali solubility, water absorption, dyeability, and texture described in the examples were measured by the following methods.

(1) Tenacity (g) Warp and weft yarns were taken out from the fabric, and the yarn tenacity was measured using a Tensilon.

(2) Whiteness (total) Using a spectrophotometer attached to a reflected light measuring device using an integrating sphere, the reflectance % with respect to magnesium oxide was measured at a wavelength of 400 cm, and was used as an index of whiteness.

(3) Alkali Solubility % Using 100 times the amount of N/1ONaOH solution, the solution was treated at 65°C for 1 hour, and the weight loss rate before and after the treatment was taken as the solubility.

(4) Water absorbency - The measured value of JILT, 1096 water absorption rate (Bisic method) was defined as water absorption performance.

(5) Stainability The presence or absence of a frosty tone on the dyed fabric was visually determined.

(6) Texture The texture of the starched fabric was set as 5, and was expressed as an average value, with 4 being slightly hard, 8 being slightly hard, 2 being quite hard, and 1 being very hard.

(Example 1) In the filament process, after blending so that the blend ratio is rayon 80 and wool 20, it is spun to 808, and this is used as a weft.
A twill fabric with a warp density of 100 and a weft of 72 threads/inch was woven using rayon 808 as the warp.

This fabric was desized using an enzyme desizing agent, pT (9
, 5 and I) H11 in a sodium carbonate aqueous solution containing a nonionic surfactant at a bath ratio of 1:80 and a temperature of 80°C.
The sample was pretreated for 0 minutes, washed with water, and then dried under hot air at 105°C.

Next] (emajol Black B 6%owt
, RemajolBrilliant yellow
w QB 4%owt, HemajolQrange
Dyeing was carried out at 60°C for 60 minutes using 50 g/l of 8R8%owt1 Glauber's salt and 20 g/l of sodium carbonate at a bath ratio of 1:80 to obtain a good black dyed product. In Comparative Example 1, no pretreatment was performed (desizing cloth), in Comparative Example 2, 1)F(1) of the aqueous solution during pretreatment was set to 12.0, and other conditions were exactly the same as Example 1 of the present invention.

The results are shown in Table 1.

Table 1 Comparative Example 1 above was a starched cloth, but the dyed cloth had a frosty texture. In Comparative Example 2, although the frost-like appearance was improved, the strength was greatly reduced, the hand was hardened, and the wool became brittle, which is not preferable.

In Examples 1 and 2 of the present invention, good black-dyed products with improved frost appearance were obtained, and there was little decrease in strength and hardening of hand.

(Example 2) A plain weave fabric with a density of 100 and a weft of 72 (thin/inch), using rayon 808 &l yarn K, rayon 80, and wool 20 blended yarn 808 as the weft, was desized using an enzyme desizing agent. ,
Hydrogen peroxide (85% product) 11/A'.

Pretreated with an aqueous sodium carbonate solution containing 1 f/l of a nonionic surfactant, 1) E[9,5, at a temperature of 80°C for 80 minutes, washed with water and dried under hot air at 105°C.
ayacion yellow E-8N4G 6%
owt.

Kayacion HaQ n-8NG 6%owt
, xayac 1onBed A-8B 1%ow
Dyeing was carried out in the same manner as in Example 1 to obtain a dark blue dyed product.Comparative Example 1 had an I)H of 8.6 in the aqueous solution during pretreatment, and Comparative Example 2 had an I)H of 8.6. The other conditions were exactly the same as in Example 1 of the present invention. The results are shown in Table 2.Table 2 Although the above Comparative Example 1 had good whiteness, the dyed product had a frosty tone. In Comparative Example 2, although the frost texture was improved, there was a significant decrease in strength and hardening of the texture was observed.
This is undesirable because the wool becomes brittle.

Inventive Example 1 had improved frost resistance, less decrease in strength, and less hardening of hand.

(Example 8) A twill fabric made of a blended yarn 208 of rayon 80 and wool 20, with a warp and weft density of 67 and 62 threads/inch, was desized using an enzyme desizing agent, and hydrogen peroxide (86 % product) 10
Vl, / = off-world Wif & sex agent 1t/l in sodium carbonate aqueous solution, pHl010, temperature 80°C
The sample was treated for 80 minutes, washed with water, and then dried under hot air at 105°C. Next, dyeing was carried out in the same manner as in Example 1, and a good black-dyed product was obtained. Comparative Example 1 is one without pre-treatment (sizing cloth),
Comparative Example 21d, the pH of the aqueous solution during pretreatment was 8.0,
The other conditions were exactly the same as those in Inventive Example 1.

The results are shown in Table 8.

Table 8 In Comparative Example 1 above, the starched fabric was dyed, and the result was a frosty texture. In Comparative Example 2, although the frost texture was slightly improved, the texture became rough and hard.

Inventive Example 1 improved the frost-like appearance, and there was also little decrease in strength and hardening of the texture.

(Example 4) Weaving, desizing, or further pretreatment under the same conditions as in Example 2 was carried out using Kayacion Red E-8B.
N501/l, Na0H (88°B”) 5 cc
/1, urea 100y/1. yixer RC-FD
(manufactured by Hoechst) After padding with a dye solution containing 100 t/l and rolling it, prevent moisture evaporation and dry at 25°C.
After leaving it for 15 hours, washing and drying, a beautiful red dyed product was obtained.

The results are shown in Table 4.

Table 4 Comparative Example 1 had an unsatisfactory frosty appearance.

In Comparative Example 2, although the frosting was improved, the strength was significantly lowered and the texture was also significantly hardened.

In Example 1 of the present invention, the frosting texture was improved, and there was little decrease in strength, and there was little hardening of the texture.

(Example 5) The twill fabric of Example 1 was desized using an enzyme desizing agent,
H2O2 (85% product) 10f/l, 109 in Rasta Building
5 (manufactured by Hoechst, anionic surfactant) 7 t/l,
After padding with a pre-treatment solution containing pH 0 and winding it into a roll, preventing moisture evaporation, leaving it for 16 hours at 25°C, washing with water and drying. A beautiful red dyed product was obtained.90 Comparative Example 1 is without pre-treatment (desizing cloth), Comparative Example 2 is that the pH of the pre-treatment liquid is 8.0, and the other conditions are exactly the same as Inventive Example 1. It's the same. In the comparative example, unsatisfactory results were obtained.

The results are shown in Table 5.

Table 5 (Example 6) Weaving, desizing, or further pre-treatment of the fabric under the same conditions as in Example 1 was performed using n1rect past Black B.
Dyeing was carried out at 80° C. for 60 minutes at a bath ratio of 1:80 of 1605% OWt and 10% Glauber's salt to obtain a good black dyed product.

The results are shown in Table 6.

Table 6 Comparative Example 1 above was a starched cloth, but the dyed cloth had a frosty texture. In Comparative Example 2, although the frost and pep tone was improved, the strength was greatly reduced, hardening of the hand was observed, and the wool became brittle, which is not preferable.

In Examples 1 and 2 of the present invention, good black-dyed products with improved frosting were obtained, and there was little decrease in strength and hardening of hand.

Claims (7)

[Claims] (1) When dyeing a fibrous structure made of recycled cellulose fibers and wool, pre-treat with an alkaline aqueous solution of pH 9 to 11 to reduce the solubility of the fibrous structure in a 1/10N NaOH aqueous solution to 1 to 4%.
and Byrek method: A method for dyeing a fiber structure, which comprises dyeing after making the water absorbency 10 to 13 cm. (2) The dyeing method according to claim 1, wherein the regenerated cellulose fibers are viscose fibers. (3) The dyeing method according to claim 1, wherein the fiber structure is a yarn, a woven fabric, or a knitted fabric. (4) The dyeing method according to claim 1, wherein the fiber structure consists of 50 to 97% recycled cellulose fibers and 50 to 8% wool. (5) The dyeing method according to claim 1, wherein the alkaline aqueous solution is an aqueous solution of sodium hydroxide, sodium carbonate, sodium phosphate, or ammonia, or an aqueous solution containing hydrogen peroxide. (6) The dyeing method according to claim 1, wherein dyeing is carried out using a reactive dye. (7) The dyeing method according to claim 1, wherein dyeing is carried out using a direct dye.