GB2318130A

GB2318130A - One-bath patterned dyeing of textile fabrics having both cellulose regenerated fibre modified for cationic dyeing & either unmodified fibre, cotton or wool

Info

Publication number: GB2318130A
Application number: GB9708691A
Authority: GB
Inventors: Ituo Kurahasi; Hiroaki Tanibe; Kikuo Kakizaki; Makoto Kawamura
Original assignee: Fuji Spinning Co Ltd
Current assignee: Fuji Spinning Co Ltd
Priority date: 1996-10-09
Filing date: 1997-04-30
Publication date: 1998-04-15
Anticipated expiration: 2017-04-30
Also published as: AU722711B2; AU1897997A; GB9708691D0; ITMI971922A1; IT1293842B1; DE19734062A1; JPH10121384A; GB2318130B; DE19734062B4

Abstract

A method for the dyeing of textile fabrics containing modified cellulose regenerated fibre, capable of being dyed with cationic dyes, and further containing at least one kind of fibre selected from ordinary cellulose regenerated fibre, cotton and wool, comprises dyeing of the textile fabric with a dyeing solution containing cationic dyes alone or containing cationic dyes and other dyes by a one-bath dyeing method to form a sprinkly pattern, dungaree pattern, chambray pattern, check pattern or striped pattern. The modified fibre capable of being dyed with cationic dyes is obtained by incorporating into the spinning solution, before spinning, polystyrene sulphonate or a compound having anionic groups such as an insoluble polymer which is obtained by cross-linking a dihydroxydiphenylsulphone-sulphonate condensate with epoxy compounds having at least two epoxy groups in the molecule. The method may further include sequential treatment of the dyed textile fabric with an aqueous solution of tannic acid and then with an aqueous solution of tartar emetic. The dyed textile fabric may be further treated with a resin reactive to cellulose for cross-linking, eg an N-methylol-based resin.

Description

2318130 METHODS OF DYEING AND DYEING- FINISHING OF TEXTILE FABRICS

CONTAINING MODIFIED CELLULOSE REGENERATED FIBRE The present invention relates to methods for the dyeing and dyeing- finishing of textile fabrics containing modified cellulose regenerated fibre to form a sprinkly pattern, dungaree pattern, chambray pattern, check pattern or striped pattern having a good tone, without causing soiling to the undyed part, deformation, uneven dyeing and blurring. These methods can be applied to clothes.

Cellulose fibre generally exhibits good dyeability for direct dyes and reactive dyes but exhibits poor dyeability for cationic dyes. There has long been a strong desire for the application of cationic dyes to cellulose fibre because of their bright colour development. Attempts have been made to introduce acidic groups into cellulose fibre to make it dyeable with cationic dyes.

For example, Japanese Patent Publication No. 19207/1982 discloses the introduction of aromatic acyl groups or aromatic sulphonic groups into the surface of cellulose fibre with the aid of aromatic carboxylic acid or aromatic sulphonic acid.

The thus modified cellulose fibre is dyeable with cationic dyes in the presence of an anionic surface active agent having a sulphate ester group or a sulphonic acid group. This method, however, needs complicated steps for the direct chemical modification of cellulose molecules of cellulose fibre. In addition, the resulting modified ceilulose fibre loses the feel and moisture absorption inherent in cellulose fibre. Furthermore, in the case of dark colour dyeing, the 2 introduction of aromatic acyl groups or aromatic sulphonic groups on the surface of cellulose fibre poses a problem in relation to colour fastness, especially to light and washing.

Japanese Patent Publication No. 4474/1993 discloses the modification of cellulose regenerated fibre. This modification is accomplished by treating cellulose regenerated fibre or textile fabric which contains 0.1 - 20 wt% of polystyrene sulphonate having a molecular weight of 1,000 2,000,000 with an aqueous solution of tannic acid before or after dyeing with cationic dyes. The disadvantage of this method is that the dyed product is in practice poor in terms of colour fastness because the tannic acid is simply attached to the surface of the fibre.

There has been a strong demand for piece dyeing capable of dyeing textile fabrics in a desired colour pattern by a one-bath dyeing process because the current dyeing method does not meet the requirements for dealing with a large variety of products in,small lots and for quick delivery. At present, shirts and pants having a sprinkly pattern, dungaree pattern, chambray pattern, check pattern or striped pattern are produced by weaving or knitting previously dyed yarns and bleached yarns of cotton or cellulose regenerated fibre.

It is known that textile fabrics of cotton or cellulose regenerated fibre are superior in feel and moisture absorption to those of synthetic fibre but suffer the disadvantage of being liable to wrinkling and shrinking upon washing.

It has been disclosed (in Japanese published patent application No. 158263/1996) that an insoluble polymer which is obtained by cross-linking a dihydroxydiphenylsulphone- sulphonate condensate with epoxy compounds having at least two epoxy groups in the molecule, can be incorporated into 3 cellulose viscose immediately before spinning. It is thereby possible to obtain modified cellulose regenerated fibre which has a practically sufficient strength without any loss of feel and moisture absorption which is inherent in cellulose regenerated fibre and which exhibits good dyeability for cationic dyes and good colour fastness.

However, this finding did not lead to the.one-bath dyeing method for imparting the sprinkly pattern, dungaree pattern, chambray pattern, check pattern, or striped pattern to textile fabrics containing modified cellulose regenerated fibre, nor did it lead to a dyeing-finishing method for producing textile fabrics having good colour fastness for cationic dyes, having good wash-and-wear properties, having resistance to shrinkage with washing and resistance to deterioration of strength, and having good feel.

It is an object of the present invention to provide a method for the dyeing of textile fabrics containing modified cellulose regenerated fibre capable of being dyed with cationic dyes, by dyeing in one-bath to form a sprinkly pattern, dungaree pattern, chambray pattern, check pattern, or striped pattern. It is another object of the present invention to provide a method of the dyeing and dyeingfinishing of textile fabrics to give them good colour fastness, good wash-and-wear properties, and good feel without deterioration of strength and without shrinkage with washing and ironing.

In accordance with the present invention there is provided a method for the dyeing of textile fabrics containing modified cellulose regenerated fibre capable of being dyed with cationic dyes, said method comprising dyeing of the textile fabrics with a dyeing so-rution containing cationic 4 dyes alone or containing cationic dyes and dyes other than cationic dyes by a one-bath dyeing method to form a sprinkly pattern, dungaree pattern, chambray pattern, check pattern, or striped pattern. The step of said dyeing method may be followed by sequential treatment with an aqueous solution of tannic acid, and after that with an aqueous solution of tartar emetic. The steps of said dyeing- finishing method may be followed by further treatment for cross-linking with resins reactive to cellulose. The modified cellulose regenerated fibre capable of being dyed with cationic dyes is obtained by incorporating into the spinning solution, before spinning, polystyrene sulphonate or an insoluble polymer which is obtained by cross-linking dihydroxy-diphenylsulphonesulphonate condensate with epoxy compounds having at least two epoxy groups in the molecule.

The term "textile fabrics containing modified cellulose regenerated fibre" used herein embraces woven or knitted products formed from modified cellulose regenerated fibre capable of being dyed with cationic dyes and at least one kind of fibre selected from ordinary cellulose regenerated fibre, cotton and wool. They may be produced from previously prepared blended yarn or twisted union yarn or may be in the form of union fabrics made from individual spun yarns. The content of modified cellulose regenerated fibre in the textile fabric is not specifically restricted, and it may be established adequately according to the desired pattern and colour.

The modified cellulose regenerated fibre used in the present invention may be produced by either the viscose process (including polynosic) or the cuprammonium process. It may be incorpo-rated with an inorganic pigment (such as titanium dioxide) for delustering.

The modified cellulose regenerated fibre may be rendered dyeable with cationic dyes by incorporating the cellulose viscose solution etc., immediately before spinning, with polystyrene sulphonAte or a compound having anionic groups such as an insoluble polymer which is obtained by crosslinking a dihydroxy- diphenylsulphone-sulphonate condensate with epoxy compounds having at least two epoxy groups in the molecule.

The polystyrene sulphonate should be one which has a molecular weight of 5,000 to 1,000,000, preferably 10,000 to 500,000. Its content should be 0.5 to 10 wt%, preferably 1.0 to 7 wt%, of the weight of cellulose. # The insoluble polymer which is obtained by cross-linking a dihydroxydiphenyl-sulphone-sulphonate condensate with epoxy compounds having at least two epoxy groups in the moleculer is obtained, in the form of aqueous dispersion, by the process disclosed by the present applicant in Japanese published patent application No. 158263/1996. This process consists of cross-linking a dihydroxydiphenyl-sulphone-sulphonate condensate (represented by the formula 1) with one or more than one kind of polyfunctional epoxy compounds in a slightly basic aqueous solution of pH 7.5 to 10 at 30 to 900C for 4 to 12 hours.

Formula 1 C02 CH2 NO (D S02 so m n 6 (Where M denotes a monovalent metal atom such as sodium and potassium, and n is an integer from 2 to 20).

Examples of the polyfunctional epoxy compounds include sorbitol polyglycidyl ether, pentaerythritol polyglycidyl ether, glycerol polyglycidyl ether, resorcin diglycidyl ether, 1, 6-hexanediol diglycidyl ether, ethyleneglycol diglycidyl ether, and neopenty1glycol diglycidyl ether, etc.

Incidentally, the dihydroxydiphenyl - sulphone -sulphate condensate and the epoxy compound as a cross-linking agent should be used in a ratio of from 1:1 to 1:3 in terms of the hydroxyl equivalent of the former and the epoxy equivalent of the latter. In the case where more than two epoxy compounds are used, the epoxy equivalent is in terms of the total value of their individual epoxy equivalents. The amount of the insoluble polymer in the viscose solution should be 5 to 50 wt%, preferably 10 to 40 wt%, of the weight of cellulose. An adequate amount should be established in consideration of colour yield of cationic dyes and fibre tenacity.

The modified cellulose regenerated fibre dyeable with cationic dyes may be prepared by incorporation with an insoluble polymer which is obtained by cross-linking a dihydroxydiphenyl-sulphone-sulphonate condensate with an epoxy compound having at least two epoxy groups in the molecule.

It is preferable because it can be dyed, like cellulose fibre, with direct dyes or reactive dyes.

The dyeing method and dyeing-finishing method according to the present invention consist of dyeing the textile fabric containing modified cellulose regenerated fibre dyeable with cationic dyes alone or in combination with dyes other than cationic dyes by a one-bath dyeing process. For dyes other 7 than cationic dyes, direct dyes and reactive dyes are preferable. The dyeing is intended to form the sprinkly pattern, dungaree pattern, chambray pattern, check pattern, or striped pattern. Dyeing is followed by washing. In the case where it is desirable to dye modified cellulose regenerated fibre and leave other fibre undyed, dyeing may be accomplished by using cationic dyes alone. In the case where it is desirable to dye both modified cellulose regenerated fibre and other fibre, dyeing may be accomplished by using dye solutions containing cationic dyes and direct dyes or reactive dyes, with dyeing being followed by washing.

The concentration of each dye varies depending on the colour desired. An adequate amount of cationic dyes should be established on the basis of the weight of modified cellulose regenerated fibre, because cationic dyes are picked up by modified cellulose regenerated fibre. An adequate amount of direct dyes or reactive dyes should be established on the basis of the total weight of textile fabric, because direct dyes and reactive dyes are picked up by all kinds of fibre.

The dyeing method according to the present invention may be followed by sequential treatment with an aqueous solution of tannic acid, and after that with an aqueous solution of tartar emetic. This treatment is designed to improve the colour fastness. Therefore, the specified order of treatment should be observed and the two aqueous solutions should be used sequentially; otherwise, the dye will not be firmly fixed to the fibre.

The aqueous solution of tannic acid is usually adjusted to pH 3 to 6, preferably pH 4 to 5, with acetic acid. The concentration of tannic acid to be picked up by the dyed fibre 8 is usually 1.5 to 7 wtk, preferably 2 to 6 wtk, of the weight of the dyed fibre. With a concentration of less than 1.5 wt%, the tannic acid does not produce the desired colour fastness. With a concentration in excess of 7 wt%, the tannic acid causes the cationic dyes to soil the undyed fibre. The treatment should be carried out at 30 to 9CC, preferably 50 to 700C, for 10 to 60 minutes, preferably 20. to 40 minutes. The treatment with an aqueous solution of tannic acid is followed by washing and then treatment with an aqueous solution of tartar emetic adjusted to pH 3 to 6, preferably pH 4 to 5, with acetic acid.

The treatment with an aqueous solution of tartar emetic is intended to cause tannic acid to adhere firmly to the dyed fibre. The concentration of tartar emetic to be picked up by the dyed fibre should usually be 0.5 to 2.5 wt-015, preferably 0.75 to 2 wtk, of the weight of the dyed fibre. The treatment should be carried out at 30 to 900C,preferably 50 to 700C, for 10 to 60 minutes, preferably 20 to 40 minutes. The treatment with an aqueous solution of tartar emetic is followed by washing and then drying at 80 to 1200C.

Following the above-mentioned treatments, the obtained fabric optionally undergoes treatment for cross-linking with resins reactive to cellulose for reduction of shrinkage with washing and pressing and for improvement in wash-and-wear properties. This treatment brings about cross-linking between tannic acid and cellulose molecules and between cellulose molecules. Such resins include, fo r example, N-methylol compounds such as dimethylol ethylene urea, dimethylol dihydroxyethylene urea, dimethylol alkyl-carbamate, methylated dimethylol dimethoxy ethylene urea, etc., epoxy compounds such as polyalkylene glycol diglycidyl ether, glycerine diglycidyl 9 ether, etc., isocyanate compounds such as hexamethylene diisocyanate, diphenylmethane diisocyanate, etc. and vinylsulphone derivatives typified by bis-(P-hydroxyethyl) sulphone. If necessary, the resin may be used in combination with a catalyst, softener, strength improver, feel adjuster, etc.

Of these examples, N-methylol compounds.are preferable because other compounds have their individual disadvantages as given below. Epoxy compounds are not so stable when stored in the form of a solution containing a catalyst. In addition, they cause discolouration to the dyed product when they are used in combination with metal borofluoride as a catalyst. Isocyanate compounds tend to cause discolouration with the passage of time and with heating. In addition, they are comparatively expensive and hence uneconomical. VinyIsulphone derivatives lower the strength of the dyed product and need an alkaline catalyst and heat which oxidise cellulose to form polyoxycarboxylic acid derivatives. This makes it necessary to subject any dyed product of a bright light colour to bleaching after finishing.

The amount of the resin may be determined according to the application of the textile fabric to be dyed and finished. It is usually 2 to 6 wt%, preferably 2.5 to 4 wt%, of the weight of the textile fabric in consideration of colour fastness with cationic dyes, washing shrinkage, tear strength, and burst strength. Treatment is usually carried out by the pad-dry-cure method so that the resin is completely impregnated into the textile fabric. After treatment the textile fabric is squeezed by rolling with a pickup of 70 to 80% and then dried at 80 to 1200C and dry-heated at 130 to 1800C.

The duration of heat treatment is not specifically restricted, so long as it is long enough for cross-linking to take place sufficiently. It may be properly established according to the unit area weight of the textile fabric. Then the resin-treated textile fabric undergoes soaping, washing, drying, and optional oil treatment in the usual way. The resin treatment will not leach out the dye f rom the dyed fabric on account of the treatment with tannic acid and tartar emetic that precedes the resin treatment.

According to the present invention, it is possible to dye a textile fabric composed of modified cellulose regenerated fibre and any of cellulose regenerated fibre, cotton, and wool with cationic dyes alone or in combination with direct dyes or reactive dyes other than cationic dyes by a one-bath dyeing method, thereby forming a sprinkly pattern, dungaree pattern, chambray pattern, check pattern, or striped pattern. The modified cellulose regenerated fibre acquires the dyeability with cationic dyes because it contains an insoluble polymer which is obtained by cross-linking a dihydroxydiphenyl- sulphone-sulphonate condensate with epoxy compounds having at least two epoxy groups in the molecule.

In addition, after dyeing with cationic dyes, the modified cellulose regenerated fibre firmly holds tannic acid if it is treated sequentially with an aqueous solution of tannic acid and after that treated with an aqueous solution of tartar emetic. Moreover, after dyeing and treatment with an aqueous solution of tannic acid and an aqueous solution of tartar emetic, the textile fabric containing modified cellulose regenerated fibre is improved in colour fastness and wash-and-wear properties if it is treated with a cellulosereactive resin.

The present invention provides a method for dyeing and dyeing-finishing of a textile fabric containing modified cellulose regenerated fibre which is superior in colour fastness for cationic dyes, wash-and-wear properties, washability without shrinkage and deterioration of strength, feel, dye fixing, and dyeability without deformation, soiling of undyed parts, and blurring. The method of the present invention is suitable for dyeing and dyeing-finishing a large variety of products, each in small lots.

The invention will now be described in more detail with reference to the following Examples, which are not intended to restrict the scope of the invention. Using the test methods explained below, samples were tested for colour fastness, shrinkage with washing, shrinkage with pressing, wash-and-wear properties, tear strength, burst strength, feel, dye fixing and dyeability.

Colour fastness:

Rubbing (dry, wet): JIS L-0849-1971 Light: JIS L-0842-1988 (20 hours exposure) Sweat (acidic, alkaline): JIS L-0848-1978, Method A Washing: JIS L-0844-1986 Shrinkacre with washina: JIS L-1042-1992, Method F3 (tumbler, hanger drying) Shrinkade with pressiW: JIS L-1042-1992, Method H-3 Wash-and-wear properties: JIS L-1096-1979, 6.23, Method A (tumbler drying) Tear strenath: JIS-L-1096-1979, 6.15.5, Method D Burst strength: JIS L-1018-1990, Method A (Mullen-type) Feel: sensory test by five panellists @ (Good): all of five panellists agree 12 0 (Fair): 4 or 3 panellists agree A (Poor): 2 or 1 panellist agrees X (Bad): None of five panellists agree Wye fixing: The colour of the resin solution before treatment is compared with that after treatment by sensory test by five panellists.

0 (Good): all panellists recognise no colour change 0 (Fair): 4 or 3 panellists recognise no colour change A (Poor): 2 or 1 panellist recognises no colour change X (Bad): all panellists recognise colour change Dyeabilit: sensory test by five panellists for staining, deformation of pattern, uneven dyeing, and blurring.

0 (Good): all panellists agree 0 (Fair): 4 or 3 panellists agree is A (Poor): 2 or 1 panellist agrees X (Bad): none of panellists agree EXADME 1.

Dihydroxydiphenyl-sulphone-sulphonate was prepared by adding sodium hydroxide to 400 weight parts of an aqueous solution of dihydroxydiphenyl-sulphonate condensate ("Nylox 150011, 40% active ingredient, from Ipposha Yushi Kogyo Co., Ltd.). To the dihydroxydiphenyl-sulphone-sulphonate was added for cross-linking 55 weight parts of re'sorcin diglycidyl ether ("Dehacol EX20111, having an epoxy equivalent of 118, from Nagase Kasei Co'., Ltd.), and 65 weight parts of neopenty1glycol diglycidyl ether ("Denacol EX-21111, having an epoxy equivalent of 140, from Nagase Kasei Co., Ltd.). The 13 amount of the crosslinking agents is such that the hydroxyl equivalent of the dihydroxydiphenyl-sulphone-sulphonate condensate matches the total epoxy equivalents of the cross linking agents.

After adding water, the mixture of dihydroxyphenyl sulphone-sulphonate condensate and cross-linking agents was thoroughly dispersed by using a homogeniser,.and the aqueous dispersion was adjusted to pH 8.0 with sodium hydroxide. The total amount of added water and sodium hydroxide was 479 weight parts. The aqueous dispersion was stirred at SO'C for 6 hours to give an aqueous dispersion of a cross-linked polymer of dihydroxydiphenylsulphone-sulphonate condensate.

This aqueous solution was added to polynosic viscose obtained in the usual way immediately before spinning such that it accounts for 40 wt% of the weight of cellulose. After the usual spinning, there was obtained modified polynosic fibre, 1.25 denier, 38 mm.

The modified polynosic fibre was mixed-spun with polynosic fibre (1.25 denier, 38 mm) in a mixing ratio of 30% to 70.06 to give a blended yarn (40's). The blended yarn was woven into a plain weave fabric (110 warps/inch and 75 wefts/inch). The plain weave fabric underwent gassing, desizing, scouring, bleaching, mercerising, washing, and drying in the usual way.

The plain weave fabric was placed in a jet dyeing machine and dyed with a dyeing solution, as specified below, at 1OCC for 40 minutes, with the fabric and a dyeing solution ratio being 1:30.

Composition of the dyeing solution:

30. Blue cationic dye (11Astrazen Blue F2RW, from Hodogaya Kagaku Kogyo Co., Ltd.), 1.5% owf (for modified polynosic 14 Kagaku Kogyo Co., Ltd.), 1.3% owf (for modified polynosic f ibre) Yellow cationic dye ("Cathilon Yellow 3GLH", from Hodogaya Kagaku Kogyo Co., Ltd.), 0.85% owf (for modified polynosic 5 fibre) Sodium laurylsulphate, 1% owf (for modified polynosic fibre) Dispersing agent ("Daidesupaa X-4511, from Ipposha Yushi Kogyo Co., Ltd.), 2% owf (for modified polynosic fibre) Acetic acid: 0.5 g/L 10. Sodium acetate: 0.25 g/L pH 4.0 Dyeing was followed by washing and drying. Thus there was obtained a plain weave fabric of sprinkly pattern, with the modified polynosic fibre alone dyed in black. It is designated as Sample No. 1.

The above-mentioned modified polynosic fibre was mixed- spun with polynosic fibre and wool (Wool Bumptop (66'), 38 mm) in a mixing - ratio of 45%, 25% and 30%, to give a blended yarn (30's). The blended yarn was knitted into a knitted fabric by using a single circular knitting machine (26 inches, 28 gauge, 2088 needles) made by Fukuhara Seiki Co., Ltd.

The knitted fabric was placed in a jet dyeing machine and scoured and bleached with a solution as specified below, at 950C for 30 minutes, with the fabric and a dyeing solution ratio being 1:30.

Composition of the solution:

Hydrogen peroxide (35%): 4 g/L Stabiliser ("Haipaa" from Daito Yakuhin Co., Ltd.):

1 g/L 30. Sodium carbonate: 2 g/L Penetrating agent PDaisaafu P-3011 from Dai-ichi Kogyo is Sodium carbonate: 2 g/L Penetrating agent P1Daisaafu P-3011 from Dai-ichi Kogyo Seiyaku Co., Ltd. ): 0.5 g/L The scouring and bleaching step was followed by washing 5 and drying.

After that, the obtained fabric was dyed with a dyeing solution as specified below, at 1000C for 40 minutes, with the fabric and a dyeing solution ratio being 1:30.

Composition of the dyeing solution:

10. Red cationic dye ("Astra Phloxine FF conc", from Hodogaya Kagaku Kogyo Co., Ltd.), 0.25%; owf (for modified polynosic fibre) Yellow cationic dye ("Cathilon Yellow 7GLHO, from Hodogaya Kagaku Kogyo Co., Ltd.), 0.5% owf (for modified polynosic fibre) Sodium laurylsulphate, 1% owf (for modified polynosic fibre) Dispersing agent ("'Daidesupaa X-4511, from Ipposha Yushi Kogyo Co., Ltd. ), 2% owf (for modified polynosic fibre) Acetic acid: 0.5 g/L 20. Sodium acetate: 0.25 g/L. pH 4.0 Dyeing was followed by washing and drying. Thus there was obtained a knitted fabric of sprinkly pattern, with the modified polynosic fibre alone dyed in red. It is designated as Sample No. 2.

The above-mentioned modified polynosic fibre was spun into spun yarn (50"). This spun yarn of modified polynosic fibre in combination with spun yarn of polynosic yarn (50") was woven into a plain weave fabric. with 144 warps and 82 wefts per inch. Ten yarns of each kind were arranged 16 alternately in both warps and wefts. The plain weave fabric underwent gassing, desizing, scouring, bleaching, mercerising, washing, and drying in the usual way.

The plain weave fabric was placed in a jet dyeing machine and dyed with a dyeing solution as specified below, at 1OCC for 40 minutes, with the fabric and a dyeing solution ratio being 1:30.

Composition of the dyeing solution:

Blue cationic dye ("Astrazen Blue F2RW 200-0,5, from Hodogaya Kagaku Kogyo Co., Ltd.), 1.2% owf (for modified polynosic yarn) Yellow direct dye ("Kayarus Supra Yellow GSW, from Nippon Kayaku Co., Ltd. ), 0.2% owf Sodium laurylsulphate, 1% owf (for modified polynosic yarn) 15. Dispersing agent P'Daidesupaa X-4511, from Ipposha Yushi Kogyo Co., Ltd.), 2% owf (for modified polynosic yarn) Acetic acid: 0.5 g/L Sodium acetate: 0.25 g/L Sodium sulphate: 10 g/L 20. pH 4.0 Dyeing was followed by washing and drying. Thus there was obtained a plain weave fabric of check pattern, with the modified polynosic yarn dyed in marine blue with the cationic dye and direct dye and the polynosic yarn dyed in light yellow with direct dye. It is designated as Sample No. 3.

The above-mentioned spun yarn (50 / s) of modified polynosic fibre in combination with cotton spun yarn (501 S was woven into a Plain weave fabric, with 144 warps and 82 wefts per inch. Ten yarns of each kind were arranged alternately in both warps and wefts. The plain weave fabric 17 The plain weave fabric was dyed with a dyeing solution as specified below, at 1000C for 40 minutes, with the fabric and a dyeing solution ratio being 1:30.

Composition of the dyeing solution:

5. Blue cationic dye ("Catchilon Blue F2RW 200k, from Hodogaya Kagaku Kogyo Co., Ltd.), 1.2% owf (for modified polynosic yarn). Red reactive dye ("Kayaselon React Red CN-3B", from Nippon Kayaku Co., Ltd.), 0.2% owf 10. Buffer PKayaku Buffer ACO, from Nippon Kayaku Co., Ltd.), 1.5 g/L Sodium laurylsulphate, 1% owf (for modified polynosic yarn) Dispersing agent ("'Daidesupaa X-4511, from Ipposha Yushi Kogyo Co., Ltd.), 2% owf (for modified polynosic yarn) 15. Acetic acid: 0.5 g/L Sodium acetate: 0.25 g/L Sodium sulphate: 20 g/L pH 4.0 Dyeing was followed by washing and drying. Thus there was 20 obtained a plain weave fabric of check pattern, with the modified polynosic yarn dyed in blue with the cationic dye and reactive dye and the cotton yarn dyed in light pink with the reactive dye. It is designated as Sample No. 4. The samples Nos. 1 to 4 were tested for dyeability. The results are shown in Table 1.

Table 1

Sample 1 2 3 4 Dyeability. 1 0 0 0 It is noted from Table 1 that the textile fabrics containing modified polynosic fibre or spun yarn are readily 18 It is noted from Table 1 that the textile fabrics containing modified polynosic fibre or spun yarn are readily dyed by the one-bath dyeing method without uneven dyeing, staining, and blurring when dyed with a dyeing solution containing a cationic dye alone or a cationic dye in combination with a direct dye or a reactive dye other than a cationic dye. In other words, all the samples are superior in dyeability and capable of cross dyeing.

XAMPLE 2, Seven samples of woven fabrics with a sprinkly pattern were prepared by dyeing in the same manner as for Sample No. 1 in Example 1. Each of them was treated with an aqueous solution containing tannic acid in different concentrations as specified below, adjusted to pH 4.0 with acetic acid, at 700C for 30 minutes, with the fabric and the treating solution ratio being 1:30. This treatment was followed by washing. Concentration of tannic acid in the treating solution: 1.0%, 1.5%f 2.0'-.,. 5.02k, 6.096, 7.015, 8.006 owf for the modified polynosic fibre. Each of the treated samples was further treated with an aqueous solution containing tartar emetic in different concentrations as specified below, adjusted to pH 4.0 with acetic acid, at 700C for 30 minutes, with the fabric and the treating solution ratio being 1:30. This treatment was followed by washing and drying. Concentration of tartar emetic in the treating solution: 0.3-0,;, 0.5%, 0.75%, 1.5015, 2.0%, 2.5%, 3.0% owf for the modified polynosic fibre.

Thus there were obtained Samples Nos. 1-1 to 1-7 which carry tannic acidand tartar emetic. They were tested for colour fastness and dyeability. The results are shown in Table 2.

19 Table 2 mple 1 -1 1-2 11-3. 1-4. 1-5 1-6 1-7 . Sa Item concentration of 1.0 1.5 2.0 5.0 6.0 7.0 8.0 tannic acid (b owf) concentration of 0.3 0.5 0.75 1.5 2.0 2.5 '3.0 tartar emetic (% owt) Rub- Dry 3-4 4 4-5 4-5 4-5 4-5 5 Colow bing fast- wet 3 3 3-4 3-4 3 4 -4 ness (class) Light 4 4 4-5 4-5 4-5 4 4 Washing 3-4 4 4-5 5 5 Acid- 4 4-5 5 5 5 5 5 Sweat ic 9 Alka- 4 4-5 5 5 5. 5 5 line Dyeability 0 0. 0 0 - It is noted from Table 2 that the treatment with tannic acid and after that treatment with tartar emetic imparts good colour fastness and dyeability to the modified polynosic fibre when the concentration of tannic acid solution is 1.5 7% owf and tartar emetic solution is 0.5 - 2.5% owf, respectively, for the modified polynosic fibre.

EXAMPLE 3.

Six samples of woven fabrics with a sprinkly pattern were prepared by dyeing and subsequent treatment with tannic acid and tartar emetic in the same manner as for Sample No. 1-4 in Example 2. The first of them was treated with a finishing solution as specified below by padding, with the pickup yield being 70%.

Composition of the finishing solution:

N-methylol compound PRiken Resin RG-1OW, 50% active 5 ingredient, from Miki-Riken Kogyo Co., Ltd.): 80 g/L Catalyst ("Riken Fixer MX-1811, from Miki-Riken Kogyo Co., Ltd.): 25 g/L Silicone softening agent ("Raitosirikon A-54411, from Kyoeisha Kagaku Co., Ltd.): 50 g/L 10. Polyolefin softening agent ("Mabozoru PO", from Matsumoto Yushi Seiyaku Co., Ltd.): 20 g/L This treatment was followed by drying at 1200C for 1 minute and heat treatment at 1650C for 1.5 minutes. Thus there was obtained a finished plain weave fabric having a sprinkly pattern. It is designated as Sample 1-4-1.

The above-mentioned dyeing-finishing process consists of treatment with an aqueous solution of tannic acid, treatment with an aqueous solution of tartar emetic, and treatment with resin, which are performed sequentially. For the purpose of comparison, five samples were prepared in the same manner as above except that any one or two of the three treatments were omitted or the order of the treatments was changed as follows. Sample No. 1-4-2: no treatments with tartar emetic and.resin. Sample No. 1-4-3: no treatment with tartar emetic.

Sample No. 1-44: with the order of treatments changed as follows: sequential treatments with tartar emetic - tannic acid resin.

Sample No. 1-4-5: with the order of treatments changed as follows: simultaneous treatment with mixed solution of tannic acid and tartar emetic and subsequent treatment with resin.

Sample No. 1-4-6: with the order of treatments changed as 21 follows: sequential treatments with resin - tannic acid tartar emetic. Samples Nos. 1-4-1 to 1-4-6 were tested for colour fastness, shrinkage with washing and pressing, wash-and-wear properties, tear strength, feel, dye fixing, and dyeability. The results are shown in Table 3.

22 Table 3

Exam- Comparative Example ple Sample 1-4-1 1-4-3 1-4-5 1-4-6 Item 1-4-2 11-4-4 concentration of 5 5 5.5 5 5 tannic acid (% owf) Concentration of 1.5 0 0 1.5 1.5 -1.5 tartar emetic (% Owf) Resin concentration 80 0 80 80 80 80 (g/L) Amount of fixed resin 2.8 0 2.8 2.8 2.8 2.8 (% owf) Dye fixing A X Rub- Dry 5 3 3-4 3-4 3-4 3-4 bing colour Wet 4 3 3-4 3-4 3-4 3-4 fastLight 4-5 3 3-4 3-4 3-4 3-4 ness (class) Washing 5 3 3-4 3-4 3-4 3-4 Acidic 5 3 3-4 3-4 3-4 3-4 Sweat Alka- 5 3 3-4 3-4 3-4 3-4 line 1 1 Shringkage Warp 1.48 3.16 1.52 1.50 1A9 1.48 with wash 9 in (tumbler) (%) Weft +2.43 +4.31 +2.40 +2.45 +2.41 +2.51 Shrinkage with Warp 0.4 1.3 0.5 0.5 0.4 0.4 pressing (%) ft +0.4 +2.0 +0.5 +0.4 +0.5 +0.5 Wash-and-wear 4 1 4 4 4 properties (class) Tear strength Warp 2420 2730 2400 2380 2410 2390 (9) Weft 1400 1680 1420 1450 1380 1410 Feel 0 Dyeability. 0 0 0 0 23 The following is noted from Table 3. Sample No. 1-4-2 is poor in terms of colour fastness, shrinkage with washing and pressing, wash-and-wear properties, feel, and dyeability because of the omission of treatments with tartar emetic and resin. Samples Nos. 1-4-3 to 1-4-5 are poor in terms of dye fixing, colour fastness, and dyeability. Sample No. 1-4-6 is very poor in terms of dye fixing and slightly poor in terms of colour fastness and dyeability. By contrast, Sample No. 1-4-1 conforming to the present invention is superior in dye fixing owing to the sequential treatments with tannic acid and tartar emetic and is also superior in terms of colour fastness, shrinkage with washing and pressing, wash-andwear properties, tear strength, burst strength, feel, and dyeability owing to the treatment with resin.

EXAMPLE 4.

A knitted fabric of sprinkly pattern was prepared in the same manner as for Sample No. 2 in Example 1. The knitted fabric was treated at 70C for 30 minutes with an aqueous solution containing tannic acid, 5% owf (for modified polynosic fibre), adjusted to pH 4.0 with acetic acid, with the fabric and a tannic acid solution ratio being 1:30. The treatment was followed by washing. The fabric was further treated at 700C for 30 minutes with an aqueous solution of tartar emetic, 1.5% owf (for modified polynosic fibre), adjusted to pH 4.0 with acetic acid, with the fabric and a tartar emetic solution ratio being 1:30. The treatment was followed by washing and drying. The fabric was then treated with a finishing solution as specified below by padding, with the pickup yield being 80%.

Composition of the finishing solution:

N-methylol compound P1Sumitex Resin NS-1011, 45.015 active 24 ingredient, from Sumitomo Chemical Industry Co., Ltd.): loo g/L Catalyst based on magnesium chloride -chlorine complex ("Sumitex Accelerator X-8011, from Sumitomo Chemical Industry 5 Co., Ltd.): 30 g/L Aminosilicone softening agent ("Nikkasirikon AM-20211, from Nikka Kagaku Co., Ltd.): 20 g/L Polyethylene softening agent ("Yodozoru PE-40011, from Kanebo NSC Co., Ltd.): 15 g/L 10. Formalin catcher ("Faidekkusu FCK", from Dainippon Ink & Chemicals, Inc.): 5 g/L This treatment was followed by drying at 1200C for 1 minute and heat treatment at 1650C for 1.5 minutes. After oiling there was obtained a finished knitted fabric. It is designated as Sample No. 2-1. This sample was tested for colour fastness, shrinkage with washing, wash-and-wear properties, tear strength, feel, dye fixing, and dyeability. The results,are shown in Table 4.

Table 4 item Sample 2-1 1 Concentration of tannic acid 5 (% owf) Concentration of tartar 1.5 emetic (% owt) Resin concentration (g/L) 100 Amount of fixed resin (% owf) 3.6 Dye fixing 0 Dry 5 Rubbing Wet 4 Colo ur 1Light 4 fastness (class) Washing 5 Acidic 5 Sweat Alka- 5 line Shringkage with 1Warp 5.3 washing (tumbler) Weft 7.3 Shrinkage with 1Warp 1 1.7 washin (%) Weft 4.7 (dryingg by hanging) 1 1 wash-and-wear properties 4.5 (class) 1 Burst strength (kg/m2) 4.8 Feel Dyeability It is noted from Table 4 that Sample No. 2-1 is superior in dye fixing owing to the sequential treatments with tannic acid and after that treatment with tartar emetic and is also superior in terms of colour fastness, shrinkage with washing, wash-and-wear properties, tear strength, feel, and dyeability owing to the treatment with resin.

2 EXAMPLE 5.

Five rolls of the same plain weave fabric as Sample No. 3 in Example 1 were treated at 700C for 30 minutes with an aqueous solution containing tannic acid, 5% owf (for modified polynosic yarn), adjusted to pH 4.0 with acetic acid, with the fabric and a tannic acid solution ratio being 1:30. The treatment was followed by washing. The fabric was further treated at 700C for 30 minutes with an aqueous solution of tartar emetic, 1.5% owf (for modified polynosic yarn), adjusted to pH 4.0 with acetic acid. with the fabric and a tartar emetic solution ratio being 1:30. The treatment was followed by washing and drying. Thus there were obtained five rolls of plain weave fabric with a check pattern which were treated with tannic acid and tartar emetic after dyeing.

is Five kinds of resin treating solutions were prepared according to the following formulation:. N-methylol compound P,Sumitex Resin NS-1011, 45% active ingredient,,from Sumitomo Chemical Industry Co., Ltd.): 63.5 g/L, 80 g/L, 90 g/L, 127 g/L, and 190 g/L Catalyst based on magnesium chloride-chlorine complex ("Sumitex Accelerator X-8011, from Sumitomo Chemical Industry Co., Ltd.): 30 g/L Aminosilicone softening agent ("Nikkasirikon AM-20211, from Nikka Kagaku Co., Ltd.): 20 g/L 25. Polyethylene softening agent ("Yodozoru PE-40011, from Kanebo NSC Co., Ltd.): 15 g/L Formalin catcher ("Faindekkusu FCK from Dainippon Ink & Chemicals, Inc.): 5 g/L Each roll of the above-mentioned plain weave fabrics was treated with the above-mentioned resin treating solution by padding, with the pickup yield being 70%. This treatment was 27 followed by drying at 1200C for 1 minute and heat treatment at 1650C for 1.5 minutes and oiling. Thus there were obtained samples of finished plain weave fabrics with a check pattern.

They are designated as Samples Nos. 3-1 to 3-5.

These samples were tested for colour fastness, shrinkage with washing and pressing, wash-and-wear properties, tear strength, dye fixing, feel, and dyeability. -The results are shown in Table 5.

28 Table 5 sample 3-1 3-2 3-3 3-4 3-5 Item Concentration of 5 5 5 5 5 tannic acid (% owf) Concentration of 1.5 1.5 1.5 1.5 1.5 tartar emetic (% owf) Resin concentration 63.5 80 95 127 190 (g/L) 1 Amount of fixed resin 2.0 2.5 3.0 4.0 6.0 (% owf) 1 Dye fixing @ Rub- ry 5 5 5 5 5 bing Wet 4 4 4 4 4 Colo ur.

fast- 1Light 4-5 1 4-5 1 4-5 1 4-5 1 4-5 ness (class) Washing 5 5 5 5 5 Acidic 1 5 5 5 5 5 Sweat Alka- 5 5 5 5 5 line Shrinkage with 1 Warp 2.12 1.80 1.73 1.13 0.98 washing (tumbler) 1 Weft j+2.90 j+2.73 j+2.68 1 +2.21 1 +2.10 Shrinkage with 1Warp 1 0.9 j 0.7 1 0.6 1 0.3 1 0.2 --- pressing (%) 1weft 1 +1.0 j +0.7 1 +0.4 1 +0.4 Wash-and-wear 3 3.5 4 4 4.5 properties (class) Tear strength 1 Warp 1 2370 2270 2260 2300 2180 (9) Weft 1350 1300 1230 1130 1020 Feel 0 @ 0 Dyeability @ @ It is noted from Table 5 that the plain weave fabric composed of modified polynosic yarn and polynosic 29 yarn as arranged 10 yarns each alternately in both warps and wefts was capable of cross dyeing with a cationic dye and a direct dye. Treatment with tannic acid (51-k owf) and tartar emetic (1.50-. owf) for modified polynosic yarn improves the dye fixing. Furthermore, treatment with a cellulose -reactive resin (2 - 6% owf) improves the fabric in terms of colour fastness, shrinkage with washing, wash-and-wear properties, feel, and dyeability. Sample No. 3-1 is slightly poor in wash-and-wear properties because the amount of fixed resin is slightly small. Sample No. 3-5 is slightly poor in tear strength and feel because the amount of fixed resin is slightly large.

EXAMPLE 6.

Five rolls of the same plain weave fabric as Sample No.

4 in Example 1 were treated at 700C for 30 minutes with an aqueous solution containing tannic acid, 5% owf (for modified polynosic yarn), adjusted to pH 4.0 with acetic acid, with the fabric and a tannic acid solution ratio being 1:30. The treatment was followed by washing. The fabric was further treated at 700C for 30 minutes with an aqueous solution of tartar emetic, 1.5% owf (for modified polynosic yarn), adjusted to pH 4.0 with acetic acid, with the fabric and a tartar emetic solution ratio being 1:30. The treatment was followed by washing and drying. Thus there were obtained five rolls of plain weave fabric with a check pattern which were treated with tannic acid and tartar emetic after dyeing.

Five kinds of resin treating solutions were prepared according to the following formulation:

N-methylol compound ("Riken Resin RG-1OW, 50% active 30 ingredient, from Miki Riken Kogyo Co., Ltd.): 57 g/L, 72 g/L, 86 g/L, 114 g/L, and 171 g/L Catalyst ("Riken Fixer MX-1811, from Miki Riken Kogyo Co., Ltd.): 25 g/L Silicone softening agent (11Raitosirikon A-54411, from Kyoeisha Kagaku Co. , Ltd.): 50 g/L 5. Polyolefin softening agent PMabozoru PO", from Matsumoto Yushi Seiyaku Co., Ltd.): 20 g/L Each roll of the above-mentioned plain weave fabrics was treated with the above-mentioned resin treating solution by padding, with the pickup yield being 70%. This treatment was followed by drying at 1200C for 1 minute and heat treatment at 1650C for 1.5 minutes and oiling. Thus there were obtained samples of finished plain weave fabrics with a check pattern. They are designated as Samples Nos. 4-1 to 4-5.

These samples were tested for colour fastness, shrinkage with washing and pressing, wash-and-wear properties, tear strength, dye fixing, feel, and dyeability. The results are shown in Table 6.

4 31 Table 6

Sample 4-1 4-2 4-3 4-4 Item Concentration of tannic 5 5.5 5 5 acid (% owf) Concentration of tartar 1.5 1.5 1.5 1.5 1.5 emetic (% owf) Resin concentration 57.0 72 86 114 171 (g/L) Amount of fixed resin (% 2.00 2.52 3.01 3.99 -5.99 owf) 1 Dye fixing @ @ @ @ Rub- Dry 5 S 5 5 5 bing Colour 1Wet 4 1 4 1 4 4 4 fast- Li ght 4-5 1 4-5, 1 4-5 4-5 4-5 ness (class) Washing 5 1 5 1 5 5 5.

Acidic 1 5 1 5 1 5 5 5 - Sweat Alka- 5 5 5 5 -5 line Shrinkage with JWarp 1 2.12 1 1.80 1 1.67 1.13 0.92 washing (tumbler) (%) Weft +2.90 +2.73 +2.5.0 +2.21 +2.07 1 1 1 Shrinkage with Warp 0.9 1 0.7 1 0.5 0.3 0.2 pressing (%) JWeft +1.0 1 +0.8 1 +0.6 1 +0.4 1 +0.4 Wash-and-wear properties 3 3.5 4 4 4. 5 (class) Tear strength Warp 2520 2410 2250 2160 (g) Weft 1460 1350 1220 1190 1060 Feel @ @ @ @ 0 Dyeability @ @ @ @ It is noted from Table 6 that the plain weave fabric composed of modified polynosic yarn and polynosic 32 yarn as arranged 10 yarns each alternately in both warps and wefts was capable of cross dyeing with a cationic dye and a reactive dye. Treatment with tannic acid (5-. owf) and tartar emetic (1.5% owf) for modified polynosic yarn improves the dye fixing. Furthermore, treatment with a cellulose -reactive resin (2-6!k owf) improves the fabric in terms of colour fastness, shrinkage with washing, wash-and-wear properties, feel, and dyeability. Sample No. 4-1 is slightly poor in wash-and-wear properties because the amount of fixed resin is slightly small. Sample No. 4-4 is slightly poor in tear strength and feel because the amount of fixed resin is slightly large.

EXAMPLE 7

The modified polynosic yarn (50's) obtained in the same manner as in Example 1 and polynosic yarn (50's) were woven into a plain weave fabric, with 144 warps and 82 wefts per inch. Ten yarns of each kind were arranged alternately in both warps and wefts. The plain weave fabric underwent gassing, desizing, scouring, bleaching, mercerising, washing and drying in the usual way.

Composition of the dyeing solution:

Blue cationic dye PICathilon Blue 3GLHI1, from Hodogaya Kagaku Kogyo Co., Ltd.), 1.0% owf (for modified polynosic yarn) Sodium laurylsulphate, 1k owf (for modified polynosic yarn) 30. Dispersing agent (11Daidesupaa X-4511, from Ipposha Yushi 33 Kogyo Co., Ltd.), 2% owf (for modified polynosic yarn) Acetic acid: 0.5 g/L Sodium acetate: 0.25 g/L pH 4.0 5 Dyeing was followed by washing. Thus there was obtained a plain weave fabric of check pattern, with the modified polynosic yarn dyed in turquoise blue and the polynosic yarn remaining undyed. The resulting fabric was treated at 700 for 30 minutes with an aqueous solution containing tannic acid, 2% owf (for modified polynosic yarn), adjusted to pH 4.0 with acetic acid, with the fabric and a tannic acid solution ratio being 1:30. The treatment was followed by washing. The fabric was further treated at 7CC for 30 minutes with an aqueous solution of tartar emetic, 0.75% owf (for modified polynosic yarn), adjusted to pH 4. 0 with acetic acid, with the fabric and a tartar emetic solution ratio being 1:30. The treatment was followed by,washing and drying.

The fabric was treated with a resin solution of the following formulation, by padding, with the pickup yield being 800k.

N-methylol compound PRiken Resin RG-1OW, 50% active ingredient, from Miki Riken Kogyo Co., Ltd.): loo g/i, Catalyst PRiken Fixer MX-1811, from Miki Riken Kogyo Co., 25 Ltd.): 25 g/L Silicone softening agent ("Raitosirikon A-54411, from Kyoeisha Kagaku Co., Ltd.): 50 g/L Polyolefin softening agent ("Mabozoru PO", from Matsumoto Yushi Seiyaku Co., Ltd.): 20 g/L This resin treatment was followed by drying at 1200C for 1 minute and heat treatment at 1650C for 1.5 minutes and oiling.

34 Thus there was obtained Sample No. 5. This sample was tested for colour fastness, shrinkage with washing and pressing, wash-and-wear properties, tear strength, feel, dye fixing and dyeability. The results are shown in Table 7.

0 Table 7

Item Sample Concentration of tannic acid 2 (% Owf) Concentration of tartar 0.75 emetic (% Owf) Resin concentration (g/L) 100 Amount of fixed resin (% owf) 4.00 Dye fixing 0 Dry 5 Rubbing Wet 4 Colour Light 4 fastness (class) Washing 5 Acidic 5 Sweat Alka- 5 line Shrinkage with Warp 1.67 washing (tumbler) Weft +2.32 (%) 1 Shrinkage with Warp 0.5 pressing (%) Weft +0.5 Wash-and-wear properties 4 (class) Tear strength (g) 1Warp 2210 Weft 1200 Feel Dyeability - It is noted from Table 7 that the plain weave 36 ' fabric composed of modified polynosic yarn and polynosic yarn was capable of cross dyeing with a cationic dye which dyes the former alone. Treatment with tannic acid (2% owf) and tartar emetic (0.75% owf) for modified polynosic fibre spun yarns improves the dye f ixing. Furthermore, treatment with a cellulose- reactive resin (4% owf) improves the fabric in terms of colour fastness, shrinkage with washing., wash-and-wear properties, tear strength, feel and dyeability.

The modified polynosic fibre obtained in Example 1 was made into spun yarn (20 s) This spun yarn f or warps and polynosic yarn (20"5) for wefts were woven into a twill weave fabric, with 105 warps and 58 wefts per inch. The twill weave fabric underwent gassing, desizing, scouring, bleaching, mercerising, washing, and drying in the usual way.

The twill weave fabric was placed in a jet dyeing machine and dyed wit,h a dyeing solution under the same conditions as in Example 7. Thus there was obtained a twill fabric of dungaree pattern, with the modified polynosic yarn dyed in turquoise blue and the polynosic yarn remaining undyed.

The twill fabric was treated with tannic acid and tartar emetic in the same manner as in Example 7, except that the concentration of tannic acid was changed from 2% to 6% owf and the concentration of tartar emetic was changed from 0.75% owf to 2% owf and the concentration of resin was changed from 100 g/L to 50 g/L. Thus there was obtained Sample No. 6, with the modified polynosic yarn dyed alone in turquoise blue for the dungaree pattern.

This sample was tested for colour fastness, shrinkage with washing and pressing, wash-andwear properties, tear 37 strength, feel, dye fixing and dyeability. The results are shown in Table 8.

1 38 Table 8

Item Sample 6 Concentration of tannic acid 6 (% Owf) Concentration of tartar 2 emetic (% owf) Resin concentration (g/L) so Amount of fixed resin (% owf) 2 Dye fixing @ iDry 5 Colour Rubbing Weti 4 fastness Light 4 (class) washing 5 Acidic 5 Sweat Alka- 5 line Shrinkage with Warp 2.40 washing (tumbler) Weft +3.00 Shrinkage with Warp 0.5 pressing (%) 1Weft +0.7 Wash-and-wear properties 3.5 (class) Tear strength (g) Warp 3200 and up Weft 3200 and up Feel Dyeability It is noted from Table 8 that the twill fabric composed of modified polynosic yarns for warps and polynosic fibre spun yarns for wefts, and dyed in the 39 dungaree pattern is superior in terms of dye fixing, colour fastness, shrinkage with washing and pressing, wash-and-wear properties, tear strength, feel and dyeability if the modified polynosic fibre is dyed with a cationic dye by the one-bath 5 dyeing method and the fabric is treated with tannic acid (6% owf) and tartar emetic (2% owf) for the modified polynosic fibre and is further treated with a cellulose-reactive resin (20-k owf).

Claims

CLAIMS:

1. A method for the dyeing of textile fabrics which contain modified cellulose regenerated fibre capable of being dyed with cationic dyes and at least one kind of fibre selected from ordinary cellulose regenerated fibre, cotton and wool, said method comprising dyeing of said textile fabrics containing modified cellulose regenerated fibre with a dyeing solution containing cationic dyes alone or containing cationic dyes and dyes other than cationic dyes by a one-bath dyeing method to form a sprinkly pattern, dungaree pattern, chambray pattern, check pattern, or striped pattern.

2. A method as claimed in claim 1, which includes treating the dyed textile fabric sequentially with an aqueous solution of tannic acid, and after that with an aqueous solution of tartar emetic.

3. A method as claimed in claim 1 or 2, wherein said modified cellulose regenerated fibre is one which contains an insoluble polymer which is obtained by cross-linking a dihydroxydiphenyl-sulphone-sulphonate condensate with epoxy compounds having at least two epoxy groups in the molecule.

4. A method for the dyeing-finishing of textile fabrics containing modified cellulose regenerated fibre capable of being dyed with cationic dyes and at least one kind of fibre selected from ordinary cellulose regenerated fibre, cotton and wool. said method comprising dyeing of the textile fabrics containing modified cellulose regenerated fibre with a dyeing solution containing cationic dyes alone or containing cationic dyes and dyes other than cationic dyes by a one-bath dyeing method to form a sprinkly pattern, dungaree pattern, chambray pattern, check pattern, or striped pattern, and treating the dyed textile fabric sequentially with an aqueous solution of 41 tannic acid, and then with an aqueous solution of tartar emetic, and further treating the dyed textile fabric with a resin or resins reactive to cellulose.

5. A method as claimed in claim 4, wherein the resin reactive to cellulose is an N-methylol-based resin reactive to cellulose.

6. A method as claimed in claim 4 or - 5, wherein the modified cellulose regenerated fibre is one which contains an insoluble polymer which is obtained by cross-linking a dihydroxydiphenyl-sulphone-sulphonate condensate with epoxy compounds having at least two epoxy groups in the molecule.

7. A method for the dyeing of textile fabrics, substantially as hereinbefore described with reference to the foregoing Examples.

is

8. A method for the dyeing-finishing of textile fabrics, substantially as hereinbefore described with reference to the foregoing Examples.