Garment dyeing process

Abstract

A process for dyeing garments, to create a three-dimensional effect for ready-to-wear garments, through which a special effect was applied to the garment surfaces. The process includes pretreatment, dyeing, oxidation, saponification, treatment for special effect, and softening stage. The substances used therein include dyes (DIRESUL/SODYESUL), wetting agent, soda ash, reductant, oxidant, acetic acid, detergent, aqueous enzyme solution, enzyme powder, softener, and siloxane, etc. The garments treated by the dyeing process present a stereoscopic impression, bright color and cozy hand feel, and tender and smooth touches, the surface of which has a glittering and light reflecting effect.

Description

FIELD OF THE INVENTION

[0001] The invention relates to a dyeing garment process.

BACKGROUND OF THE INVENTION

[0002] Since nowadays many customers, especially fashionable ladies, always enjoy dressing garments with gorgeous and special colors to follow the fashion and pursue novelty, The fabric manufacturers have been creating clothes with splendid colors and vagarious appearance to attract and meet the demand of the customers, and thus to increase the sale's volume of their products. This leads to the market being full of many beautiful and various garments. Therefore, various garment dyeing processes are developed. One of the closest prior art to the present invention is disclosed in the Chinese Patent Application CN1094466A (application No. 93105265.3, published on Nov. 2, 1994). However, in the garment-dyeing processes there exist the following disadvantages:

[0003] 1. high wastage rate of the garments, up to 10%-30%;

[0004] 2. poor color fastness, since the result garments can hardly come up to international standard due to the use of solid sulfur dyes;

[0005] 3. tendency to be stained due to the high bacteriological adhesion, high biological characteristics and unnecessary antioxygenic system.

DISCLOSURE OF THE INVENTION

[0006] To overcome the aforementioned disadvantages of the existing dyeing processes, the present invention is directed to applying a special effect on the surface of a garment to give a three dimensional impression to the garment.

[0007] This invention provides a new process for dyeing garment, characterized by the following procedures:

[0008] Procedure I: Pretreatment

[0009] 1 g/l of a wetting agent and 1 g/l of soda ash (powder) are mixed into water to form a mixture, which is then used to treat the garment in a mass ratio of 15:1 with respect of the mixture to the garments, particularly, including the steps of:

[0010] 1) mixing the wetting agent and soda ash into water to form a mixed liquor, adding the liquor into a dyeing machine. introducing the garments into the mixed liquor in a mass ratio of 15:1 with respect of the mixed liquor to the garments, and keeping the garments running at 60° C. in dyeing machine for 10 min.;

[0011] 2) rinsing the garments once at 40° C. for 2 min.;

[0012] 3) dehydrating the garments by centrifuge for 3 min.; and

[0013] 4) drying the garments at 98° C. for 30 min.

[0014] Procedure II

[0015] (A) Dyeing Stage

[0016] The dyes (weighed on the color depth), an antioxidant and sodium chloride are added into water to form a mixed liquor (dyes weighed on color depth/chemicals/sodium chloride+water), and used to treat the garments in a mass ratio of 15:1 with respect of the mixed liquor to the garments, particularly, including the steps of:

[0017] 1) mixing and adding the dyes, the antioxidant and 17 g/l of sodium chloride into water to form a dyeing liquor, introducing the garments into the dyeing liquor in a mass ratio of 15:1 with respect of the dyeing liquor to the garments, and keeping the garments running at 50° C. in the dyeing machine for 5 min.;

[0018] 2) heating to raise the temperature from 50° C. up to 70° C. within 10 min., then adding 50% sodium chloride, and keeping the garments running at 70° C. in the dyeing machine for 15 min.; and

[0019] 3) rinsing the garments at 40° C. 3 times, for 2 minutes at each time.

[0020] (B) Oxidation Stage

[0021] The oxidant and acetic acid are mixed and added into water to form a mixed liquor, which is then fed into a dyeing machine and used to treat the colored garments in mass ratio of 15:1 with respect of the mixed liquor to the garments, particularly including the steps of:

[0022] 1) mixing and adding 0.4% of the oxidant and 1.2 g/l of acetic acid into water to form a water-bathing mixed liquor, adjusting the pH value of the mixed liquor to 4, and then, introducing the colored garments into the liquor in a mass ratio of 15:1 with respect of the mixed liquor to the garments, and keeping the garments running at 70° C. in the dyeing machine for 15 min.; and

[0023] 2) rinsing the garments once at 40° C. for 2 min.

[0024] (C) Saponification (Soaping) Stage

[0025] A detergent and soda ash are mixed and added into water to form a mixed liquor, which is used to treat the garments in a mass ratio of 15:1 with respect of the mixed liquor to the garments, particularly, including the steps of:

[0026] 1) mixing and adding 0.5 g/l of the detergent and 0.5 g/l of soda ash into water to form a mixed liquor, introducing the garments in a mass ratio of 15:1 with respect of the mixed liquor to the garments, and keeping the garments running at 60° C. in the dyeing machine for 15 min.;

[0027] 2) rinsing the garments once at 40° C. for 2 min.

[0028] 3) dehydrating the garments by centrifuge for 3 min.; and

[0029] 4) drying the garments at 98° C. for 30 min.

[0030] Procedure III

[0031] (A) Treatment for Special Effect

[0032] An aqueous enzyme solution and enzyme powder (ash) as well as acetic acid are mixed into water to form a mixed liquor, which is fed into a dyeing machine to treat the garments in a mass ratio of 15:1 with respect of the mixed liquor to the garments, particularly, including the steps of:

[0033] 1) mixing 1.4% of the aqueous enzyme solution and 1.4% of enzyme powder as well as 0.3 g/l of acetic acid into water to form the mixed liquor, adjusting the pH value of the mixed liquor to 4, then introducing the garments in a mass ratio of 15:1 with respect of the mixed liquor to the garments, and keeping the garments running at 55° C. in the dyeing machine for 30 min.;

[0034] 2) raising the temperature up to 80° C. in 2 min.; and

[0035] 3) rinsing the garments at 40° C. twice, for 2 minutes at each time.

[0036] (B) Softening

[0037] A softening agent and a siloxane are mixed into water to form a mixed liquor, which is then fed into a dyeing machine to treat the garments in a mass ratio of 15:1 with respect of the mixed liquor to the garments, particularly, including the steps of:

[0038] 1) mixing 8% of the softening agent and 4% of the siloxane as well as 0.1 g/l of acetic acid into water to form a mixed liquor, feeding the mixed liquor into a dyeing machine, introducing the garments in a mass ratio of 15:1 with respect of the mixed liquor to the garments, and keeping the garments running at 40° C. in the dyeing machine for 10 min.;

[0039] 2) dehydrating the garments by centrifuge for 3 min.; and

[0040] 3) drying the garments at 98° C. for 30 min., thus obtaining the finished garments.

[0041] In each related procedure of the aforesaid dyeing treatment process, the garments are treated by running in an open dyeing machine with the mixed liquor in a mass ratio of 15:1 with respect of the mixed liquor to the garments.

[0042] Said wetting agent is polyalkyl ether, a nonionic surfactant. Said antioxidant is sodium sulphide. Said oxidant is a solution of hydrogen peroxide. Said saponifying (soaping) agent is polyalkyl ether. Said aqueous enzyme solution and said enzyme powder are prepared from a kind of cellulase. Said softening agent is a polycondensate of aliphatic polyamides.

[0043] Compared with the prior art dyeing processes, the garment dyeing process according to the present invention has a broad scope of application. It is applicable to various types of garments as listed below:

[0044] 1. common or special woven fabrics;

[0045] 2. fine or special knitted fabrics;

[0046] 3. cotton, cotton blended and pure wool knitted fabrics (including various sweater fabrics) in any specification or yarn.

[0047] Furthermore, compared with the dyeing processes of prior art, the garment dyeing process according to the present invention has the following advantages in the treatment of ready-to-wear garments:

[0048] 1. low damage rate of 3%-5% of the garments;

[0049] 2. excellent color fastness, easy to come up to international standard;

[0050] 3. difficult to be stained due to the low bacteriological adhesion, low biological characteristic, and necessary antioxygenic system introduced.

[0051] The finished garments undergone dyeing treatment by the process as mentioned above according to the present invention have the following advantages:

[0052] 1. strong three-dimensional impression;

[0053] 2. glittering and light reflecting surfaces.;

[0054] 3. tender and smooth texture, bright and beautiful color, as well as cozy hand feel.

[0055] The present invention is friendly to the environment. Having treated by the process of the present invention, various fabrics will obtain a special effect, and the quality is thereby improved. The present invention relates to a new process which is applied in garment industry. It will play an important role in the market of apparel design, and will become a key to the fine effect for garments, especially when used in bleaching, dyeing, and washing. The effect is called an uncommon or special bleaching- dyeing-washing effect.

BRIEF DESCRIPTION OF THE DRAWINGS

[0056] FIG. 1 schematically shows the pretreatment procedure of the present invention;

[0057] FIG. 2 schematically shows the dyeing and oxidation procedure of the present invention;

[0058] FIG. 3 schematically shows the saponification stage of the present invention;

[0059] FIG. 4 schematically shows the special effect treatment and the softening stage of the present invention;

[0060] FIG. 5 is a flow chart showing the whole garment-dyeing process of the present invention.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENT

[0061] To illustrate the procedures of the dyeing process according to the present invention, a preferred example is described in detail with reference to the drawings.

[0062] In order to create a three-dimensional impression on a ready-to-wear garment, a special effect was applied to the surface of the garment. In each of the procedures in the dyeing treatment process, each of the dyeing machine employed was an open dyeing machine (550 Ib), and the garments were treated in the dyeing machine by running with mixed liquor in a mass ratio of 15:1 with respect of the mixed liquor to the garments . The particular procedures of the process were as follows:

[0063] Procedure I, Pretreatment

[0064] As shown in FIG. 1,

[0065] 1) a mixed liquor was formed by mixing 1500 grams of 1 g/l polyalkyl ether as a wetting agent, and 1500 grams of 1 g/l soda ash into 1500 liters of water. 100 kg of the garments were introduced in the mixed liquor in a mass ratio of 15:1 with respect of the mixed liquor to the garments. The garments were kept running at 60° C. in the dyeing machine for 10 min. The wetting agent used therein was a nonionic type low foaming surfactant having a synergic effect, with a trade name of FORYL SF.

[0066] 2) The garments were rinsed once at 40° C. for 2 min.

[0067] 3) The garments were dehydrated by centrifuge for 3 min.

[0068] 4) The garments were dried at 98° C. for 30 min.

[0069] Procedure II

[0070] 1. Dyeing Stage

[0071] As shown in FIG. 2,

[0072] 1) A dye bath was formed by mixing 6.5 kg of 6.5% brown dye GNCF, 2.8 kg of 2.8% black dye 4GCF, 2 kg of 2% brown dye CRCF, 6000 kg of 4 g/l sodium sulphide as an antioxidant, and 25.5 g of 17 g/l sodium chloride into 1500 liters of water. Then 100 kg of the garments were introduced into the dye bath. The garments were kept running at a constant temperature of 50° C. in the dyeing machine for 5 min. The dyes used therein were all obtained from Sandoz Chemical Engineering Co., Ltd.

[0073] 2) By heating, the temperature was raised from 50° C. up to 70° C. within 10 min. Then, 50% sodium chloride was added. The garments were kept running at a constant temperature of 70° C. in the dyeing machine for 15 min.

[0074] 3) The garments were rinsed at 40° C. 3 times, for 2 minutes at each time.

[0075] 2. Oxidation Stage

[0076] As shown in FIG. 2,

[0077] 1) A mixed liquor was formed by mixing 400 g of 0.4% solution of hydrogen peroxide and 1800 g of 1.2 g/l acetic acid into 1500 liters of water. The pH value of the mixed liquor was adjusted to 4. And then, 100 kg of the garments were introduced and kept running at a constant temperature of 70° C. in the dyeing machine for 15 min.

[0078] 2) The garments were then rinsed once at 40° C. for 2 min.

[0079] 3. Saponification Stage

[0080] As shown in FIG. 3,

[0081] 1) A mixed liquor was formed by mixing 750 g of 0.5 g/l polyalkyl ether as a saponifying agent and 750 g of 0.5 g/l soda ash into 1500 liters of water. Then 100 kg of the garments were introduced and kept running at a constant temperature of 60° C. in the dyeing machine for 15 min. The saponifying agent used therein was a nonionic, nonfoaming type surfactant for textiles, produced by Henkel China Limited.

[0082] 2) The garments were rinsed once at 40° C. for 2 min.

[0083] 3) By centrifuge, the garments were dehydrated for 3 min.

[0084] 4) Then, the garments were dried at 98° C. for 30 min.

[0085] Procedure III

[0086] 1. Treatment For Special Effect

[0087] As shown in FIG. 4,

[0088] 1) A mixed liquor was formed by mixing 700 g of 1.4% of an aqueous enzyme solution, 700 g of 1.4% enzyme powder, and 225 g of 0.3 g/l acetic acid into 1500 liters of water. The pH value of the mixed liquor was adjusted to 4. And then, 100 kg of the garments were introduced and kept running at 55° C. for 30 min. Said aqueous enzyme solution and said enzyme powder were prepared from a cellulase, produced by Purident (Asia) Limited;

[0089] 2) Within 2 min., the temperature was raised up to 80° C.

[0090] 3) The garments were then rinsed twice at 40° C., for 2 min each time.

[0091] 2. Softening

[0092] As shown in FIG. 4,

[0093] 1) A mixed liquor was formed by mixing 4 kg of 8% softening agent, 2 kg of 4% siloxane and 150 g of 0.1 g/l acetic acid into 1500 liters of water. Then, 100 kg of the garments were introduced and kept running at 40° C. for 10 min. The softening agent used therein was an pseudo cationic type polycondensate of aliphatic polyamide, produced by Henkel China Limited in a trade name of BELLAIN 44.

[0094] 2) By centrifuge, the garments were dehydrated for 3 min.

[0095] 3) Subsequently, the garments were dried at 98° C. for 30 min., and thus the finished garments were obtained;

[0096] FIG. 5 schematically shows the integral flow chart of the process according to the present invention, of which all of the reductants and oxidants used are produced by Sandoz Chemical Engineering Co., Ltd.

[0097] The present invention has been described above in detail, however, the above example is only a preferable mode for carrying out the invention, but not in any way intended to limit the scope of the invention. Various changes and modifications can be made without departing from the spirit and teaching of the invention defined by the appended claims, all of which should be regarded to fall into the scope of the invention.

Claims

1. A garment dyeing process, characterized by the following procedures

Procedure I, pretreatment,

wherein 1 g/l of a wetting agent and 1 g/l of soda ash are mixed into water to form a mixture, and used to treat the garments in a mass ratio of 15:1 with respect of the mixture to the garments, including the steps of:

1) mixing the wetting agent and soda ash into water to form a mixed liquor, introducing the mixed liquor into a dyeing machine, adding the garments into the mixed liquor in a mass ratio of 15:1 with respect of the mixed liquor to the garments, and keeping the garments running at 60° C. in the dyeing machine for 10 min.,

2) rinsing the garments once at 40° C. for 2 min.,

3) dehydrating the garments by centrifuge for 3 min., and

4) drying the garments at 98° C. for 30 min.;

Procedure II

(A) dyeing stage,

wherein dyes (weighed on color depth), an antioxidant and sodium chloride are added into water to form a mixed liquor (dyes weighed on color depth/chemicals/sodium chloride+water), which is used to treat the garments in a mass ratio of 15:1 with respect of the mixed liquor to the garments, including the steps of:

1) mixing the dyes, the antioxidant and 17 g/l of sodium chloride into water to form a dyeing liquor, introducing the garments into a dyeing liquor in a mass ratio of 15:1 with respect of the dyeing liquor to the garments, and keeping the garments running at 50° C. in the dyeing machine for 5 min.,

2) heating to raise the temperature from 50° C. up to 70° C. within 10 min., then adding 50% sodium chloride, and keeping the garments running at 70° C. in the dyeing machine for 15 min., and

3) rinsing the garments at 40° C. 3 times, for 2 minutes each time;

(B) oxidation stage,

wherein the oxidant and acetic acid are mixed into water to form a mixed liquor, and then the mixed liquor is fed into a dyeing machine and used to treat the garments in a mass ratio of 15:1 with respect of the mixed liquor to the garments, including the steps of:

1) mixing 0.4% of the oxidant and 1.2 g/l of acetic acid into water to form a water bathing mixed liquid, adjusting the pH value of the mixed liquor to 4, then introducing the colored garments in a mass ratio of 15:1 with respect of the mixed liquor to the garments, and keeping the garments running at a constant temperature of 70° C. in a dyeing machine for 15 min., and

2) rinsing the garments once at 40° C. for 2 min.,

(C) saponification stage,

wherein, a detergent and soda ash are mixed into water to form a mixed liquor, which is used to treat the garments in a mass ratio of 15:1 with respect of the mixed liquor to the garments, including the steps of:

1) mixing 0.5 g/l of the detergent and 0.5 g/l of soda ash into water to form a mixed liquor, introducing the garments in a mass ratio of 15:1 with respect of the mixed liquor to the garments, and keeping the garments running at a constant temperature of 60° C. in the dyeing machine for 15 min.,

2) rinsing the garments once at 40° C. for 2 min.,

3) dehydrating the garments by centrifuge for 3 min., and

4) drying the garments at 98° C. for 30 min.; and

Procedure III

(A) treatment for special effect,

wherein a mixed liquor is formed by mixing an aqueous enzyme solution, enzyme powder, and acetic acid into water, and the mixed liquor is fed into a dyeing machine and used to treat the garments in a mass ratio of 15:1 with respect of the mixed liquor to the garments, including the steps of:

1) mixing 1.4% of the aqueous enzyme solution, 1.4% of the enzyme powder, and 0.3 g/l of acetic acid into water to form a mixed liquor, adjusting the pH value of the mixed liquor to 4, then introducing the garments in a mass ratio of 15:1 with respect of the mixed liquor to the garments, keeping the garments running at a constant temperature of 55° C. in the dyeing machine for 30 min.,

2) raising the temperature up to 80° C. within two min., and

3) rinsing the garments at 40° C. twice, for 2 minutes each time,

(B) softening,

wherein a mixed liquor is formed by mixing a softening agent and a siloxane into water, and the mixed liquor is fed into a dyeing machine and used to treat garments in a mass ratio of 15:1 with respect of the mixed liquor to the garments, including the steps of:

1) mixing 8% of the softening agent, 4% of the siloxane, and 0.1 g/l of acetic acid into water to form a mixed liquor, feeding the mixed liquor into the dyeing machine, introducing the garments in a mass ratio of 15:1 with respect of the mixed liquor to the garments, and keeping the garments running at a constant temperature of 40° C. in the dyeing machine for 10 min.,

2) dehydrating the garments by centrifuge for 3 min., and

3)drying the garments at 98° C. for 30 min., thus obtaining the finished garments;

wherein in each procedures of said process, an open dye machine is employed to treat the garments therein by running it with mixed liquor in a mass ratio of 15:1 with respect of the mixed liquor to the garments.

2. The garment dyeing process according to claim 1, characterized by said wetting agent being polyalkyl ether, a nonionic surfactant, said antioxidant being sodium sulphide, said oxidant being an solution of hydrogen peroxide, said saponifying agent being polyalkyl ether, said aqueous enzyme solution and said enzyme powder being made from an cellulase, and said softening agent being an polycondensate of aliphatic polyamides.