Printing method of meta-position aramid fiber blended fabric

Abstract

The invention discloses a printing method of meta-position aramid fiber blended fabric. The meta-position aramid fiber blended fabric comprises raw material aramid fiber blended fabric; the method comprises the following specific steps: (1) material treatment: boiling off the aramid fiber / cotton blended fabric on a boiling-off machine; when the aramid fiber blended fabric is the aramid fiber / cotton blended fabric, semi-mercerizing is needed, and the dyeing performance and the gloss of the blended cotton fiber are further improved; (2) padding the aramid fiber blended fabric with an anti-solarization finishing agent and a flame-retardant cross-linking agent by using a hot-melt dyeing bottoming machine; (3) printing various color spots of the aramid fiber blended fabric by using a rotary screen printing machine; (4) performing saturated steaming and color fixation by using a long-ring steamer or a bottomless long-ring steamer; and (5) cleaning the color-fixed aramid fiber blended fabric by using a soaping machine, and drying after cleaning to obtain a meta-aramid fiber blended fabric finished product. Before printing, the fabric is padded with an anti-ultraviolet finishing agent, and the color fastness to sunlight after printing is improved to a certain extent.

Description

Technical Field

[0001] The invention relates to a printing method, in particular to a printing method for a meta-aramid blended fabric. Background Art

[0002] Aramid macromolecules are connected by amide groups and benzene rings to form long chains, which are divided into meta-aramid called 1313 aramid and para-aramid called 1414 aramid. Aramid fiber is chemically stable and has high strength, high modulus, high temperature resistance, flame retardancy and fire resistance. Aramid fabrics are mostly used for protective clothing in high-temperature industries in front of metallurgical furnaces, forest fire protection clothing, firefighting clothing, military flame retardant combat clothing and space suits. 1313 aramid fabrics are used for high flame retardant combat clothing fabrics. In addition to having flame retardant properties, aramid fabrics need to be printed into camouflage clothing, so that the high flame retardant combat clothing fabrics also have the ability to prevent near-infrared detection and a certain degree of nuclear radiation protection. However, aramid fabrics are generally difficult to dye and print, and aramid and its blended fabrics are even more difficult to print.

[0003] After searching: Patent CN201210279650 applied by the Military Equipment Research Institute of the General Logistics Department and Xinjian Textile Co., Ltd. on August 7, 2012, invented a new method for preparing printing of meta-aramid or aramid / cotton blended fabrics.

[0004] After the scouring and bleaching process, the fabric is printed by flat screen or rotary screen. The printing paste mainly uses cationic dyes, dyeing agent 3K 4%, HAC 0.1%, and GL-8 paste 40%-80%. After printing, the cationic dye is steamed by a tank steamer, and after fixing, it is washed with water and soaped to obtain the aramid / cotton blended fabric printing product.

[0005] This process has the following disadvantages: (1) This method does not consider the problem of low sunlight fastness of aramid / cotton blended fabrics. Especially when printing light spots, aramid fibers are not resistant to sunlight, and the sunlight fastness of aramid / cotton blended fabrics is also relatively low.

[0006] (2) This dyeing method mainly involves adding a dye guide to the cationic dye paste. After printing, a tank steamer is used, with a 400-meter roll, 102°C, 15 minutes, or 172°C, 8 minutes. It is an intermittent production method with a low dye fixation rate and a low production speed.

[0007] (3) Only one type of cationic dye is described for printing aramid / cotton blended fabrics. This patent does not mention that acid dyes can also be used for printing aramid / cotton blended fabrics or aramid / flame-retardant viscose blended fabrics. Summary of the invention

[0008] The object of the present invention is to provide a printing method for meta-aramid blended fabrics to solve the problems raised in the above background technology.

[0009] To achieve the above object, the present invention provides the following technical solution: a printing method for a meta-aramid blended fabric, comprising a raw material aramid blended fabric, wherein the aramid blended fabric is a meta-aramid / cotton blended fabric or a meta-aramid / flame-retardant viscose blended fabric; the specific steps are as follows: (1) Material processing: Aramid / cotton blended fabrics need to be scoured on a scouring machine; when aramid blended fabrics are aramid / cotton blended fabrics, they also need to be semi-mercerized to further improve the dyeing performance and gloss of the blended cotton fibers; Aramid / viscose blended fabrics do not need to be scoured or semi-mercerized; aramid / flame retardant viscose blended fabrics only need to be dipped in 5-10% degreasing agent, then steamed and washed to remove the weaving oil on the aramid / flame retardant viscose fabrics.

[0010] (2) padding the aramid blended fabric with a hot melt dyeing primer, wherein the impregnation treatment liquid in the padding process includes an anti-ultraviolet finishing agent and a flame retardant cross-linking agent, and baking is performed after the padding is completed; (3) Use a rotary screen printing machine to print various color spots on aramid blended fabrics, and use the following dye pastes: A: Acid dye printing paste; B: Cationic dye printing paste; (4) Use a long-ring evaporator or a bottomless long-ring evaporator for saturated steam fixation; (5) Using a soap washing machine to wash the color-fixed aramid blended fabric, and drying after washing to obtain a finished meta-aramid blended fabric.

[0011] As a further solution of the present invention: In the above step (1), the composition of the scouring agent used in the scouring machine is as follows: Common refining agent C-168: 7-10 g / L; Caustic soda: 20-25 g / L; Penetrant JFC: 5-6 g / L; Hydrogen peroxide: 4-5 g / L; Hydrogen peroxide stabilizer: 3-4 g / L; The aramid blended fabric is saturated steamed in the crawler box of the scouring machine for 40-50 minutes, washed with hot water and then dried.

[0012] As a further solution of the present invention: the concentration of the semi-mercerized alkali solution in step (1) is as follows: 180-190 g / L of caustic soda, and the washing alkali must be clean.

[0013] As a further solution of the present invention: the step (2) uses a hot melt primer device in combination with a multi-dipping and one-rolling process to process the cleaned meta-aramid blended fabric, wherein the anti-ultraviolet finishing agent is 60-80 g / L and the flame retardant cross-linking agent is 40-60 g / L; the baking temperature after dipping and rolling is 160°C and the baking time is 3 minutes.

[0014] As a further solution of the present invention: the dye paste in step (3) is: A: Weight percentage of each raw material of acid dye printing paste: acid dye (100%) 1-8%, sodium alginate paste (8%) 40-50%, sodium hexametaphosphate 1%, HAC 0.5%, the rest is water; B: The weight percentage of each raw material of cationic dye printing paste: cationic dye (100%) 1-8%, cationic paste (10%) 40-50%, sodium hexametaphosphate 1%, HAC 0.1%, and the rest is water.

[0015] As a further solution of the present invention: in step (4), before steaming, a two-roller rolling mill is used to roll the liquid containing 4%-15% of EP-1 dyeing agent, and then saturated steaming is performed at a saturated steaming temperature of 100-102°C and a saturated steaming time of 25-30 minutes. Saturated steaming in a wet state can produce a deep and full color.

[0016] As a further solution of the present invention: the washing in step (5) can be carried out immediately into a washing machine after exiting the steamer, including cold washing, soap washing, hot washing, and drying; The soap washing temperature is 90-95°C; Hot washing temperature is 80-90℃; Soaping agent: 3-5 g / L of soaping agent for aramid.

[0017] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention adds an anti-ultraviolet finishing agent to the fabric before printing, and the color fastness to sunlight after printing is improved to a certain extent.

[0018] (2) In the present invention, no dyeing agent is added after the acid dye paste or cationic dye paste is printed, the printing machine has no irritating odor, and the operating environment is friendly.

[0019] (3) The present invention adopts a long-ring evaporator or a bottomless long-ring evaporator, and the EP-1 dyeing agent is impregnated before evaporation to obtain a very deep color yield and saturation, which can realize the continuous industrial production of meta-aramid printing. DETAILED DESCRIPTION

[0020] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0021] In an embodiment of the present invention, a printing method for a meta-aramid blended fabric is provided. The aramid blended fabrics described below are, unless otherwise specified, meta-aramid / cotton blended fabrics or meta-aramid / flame-retardant viscose blended fabrics. (1) Material processing: Aramid / cotton blended fabrics need to be scoured on a scouring machine; when aramid blended fabrics are aramid / cotton blended fabrics, they also need to be semi-mercerized to further improve the dyeing performance and gloss of the blended cotton fibers; Aramid / viscose blended fabrics do not need to be scoured or semi-mercerized; aramid / flame-retardant viscose blended fabrics only need to be dipped in 5-10% degreasing agent, then steamed and washed to remove the weaving oil on the aramid / flame-retardant viscose fabrics; (2) Use a hot melt dyeing primer to pad the aramid blended fabric. The impregnation treatment liquid in the padding process includes an anti-ultraviolet finishing agent and a flame retardant cross-linking agent. After the padding is completed, it is baked; before printing, the aramid fabric is treated with anti-sunlight (impregnation with an anti-ultraviolet finishing agent) to increase the sun resistance of the meta-aramid. (3) Use a rotary screen printing machine to print various color spots on aramid blended fabrics, and use the following dye pastes: A: Acid dye printing paste; B: Cationic dye printing paste; The two methods of using acid dyes or cationic dyes can produce darker colors; (4) Use a long-ring evaporator or a bottomless long-ring evaporator for saturated steam fixation; (5) Using a soap washing machine to wash the color-fixed aramid blended fabric as follows: cold washing, soap washing (90-95°C), hot washing (80-90°C), and drying after washing to obtain a finished meta-aramid blended fabric.

[0022] Specifically, In the above step (1), the composition of the scouring agent used in the scouring machine is as follows: Common refining agent C-168: 7-10 g / L; Caustic soda: 20-25 g / L; Penetrant JFC: 5-6 g / L; Hydrogen peroxide: 4-5 g / L; Hydrogen peroxide stabilizer: 3-4 g / L; The aramid blended fabric is saturated steamed in the crawler box of the scouring machine for 40-50 minutes, washed with hot water and then dried.

[0023] The concentration of the semi-mercerized alkali solution in step (1) is as follows: 180-190 g / L of caustic soda, and the alkali solution must be clean (after the semi-mercerized process is completed, the residual alkali solution on the meta-aramid / cotton blended fabric must be cleaned); The step (2) uses a hot melt primer device in combination with a multiple dipping and one padding process to process the cleaned meta-aramid blended fabric, wherein the anti-ultraviolet finishing agent is 60-80 g / L and the flame retardant cross-linking agent is 40-60 g / L; the baking temperature after dipping and padding is 160° C. and the baking time is 3 minutes.

[0024] The dye paste in step (3) is: A: Weight percentage of each raw material of acid dye printing paste: acid dye (100%) 1-8%, sodium alginate paste (8%) 40-50%, sodium hexametaphosphate 1%, HAC 0.5%, the rest is water; B: The weight percentage of each raw material of cationic dye printing paste: cationic dye (100%) 1-8%, cationic paste (10%) 40-50%, sodium hexametaphosphate 1%, HAC 0.1%, and the rest is water.

[0025] Step (4) Before steaming, use a two-roller rolling mill to roll with a liquid containing 4%-15% of EP-1 dyeing agent, and then steam with saturated steam at a temperature of 100-102°C for 25-30 minutes. Saturated steaming in a wet state can produce a deep and full color.

[0026] In step (5), the washing process can be performed by immediately entering a washing machine after exiting the steamer, and then undergoing cold washing, soap washing, hot washing, and drying steps to obtain the finished meta-aramid blended fabric.

[0027] Soaping agent: 3-5 g / L of soaping agent for aramid.

[0028] Before stentering, acid dye or cationic dye fixing agent is applied and then the stenter is dried.

[0029] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A printing method for a meta-aramid blended fabric, comprising a raw material aramid blended fabric, wherein the aramid blended fabric is a meta-aramid / cotton blended fabric or a meta-aramid / flame-retardant viscose blended fabric; characterized in that: The specific steps are as follows: (1) Material processing: Aramid / cotton blended fabrics need to be scoured on a scouring machine; when aramid blended fabrics are aramid / cotton blended fabrics, they also need to be semi-mercerized to further improve the dyeing performance and gloss of the blended cotton fibers; Aramid / flame retardant viscose blended fabrics need to be dipped in 5-10% degreasing agent, then steamed and washed to remove the weaving oil on the aramid / flame retardant viscose fabrics; (2) padding the aramid blended fabric with a hot melt dyeing primer, wherein the impregnation treatment liquid in the padding process includes an anti-ultraviolet finishing agent and a flame retardant cross-linking agent, and baking is performed after the padding is completed; (3) Use a rotary screen printing machine to print various color spots on aramid blended fabrics, and use the following dye pastes: A: Acid dye printing paste; B: Cationic dye printing paste; (4) Use a long-ring evaporator or a bottomless long-ring evaporator for saturated steam fixation; (5) Using a soap washing machine to wash the color-fixed aramid blended fabric, and drying after washing to obtain a finished meta-aramid blended fabric.

2. The printing method of meta-aramid blended fabric according to claim 1, characterized in that: In the above step (1), the composition of the scouring agent used in the scouring machine is as follows: Common refining agent C-168: 7-10 g / L; Caustic soda: 20-25 g / L; Penetrant JFC: 5-6 g / L; Hydrogen peroxide: 4-5 g / L; Hydrogen peroxide stabilizer: 3-4 g / L; The aramid blended fabric is saturated steamed in the crawler box of the scouring machine for 40-50 minutes, washed with hot water and then dried.

3. The printing method of meta-aramid blended fabric according to claim 1 or 2, characterized in that: The concentration of the semi-mercerized alkali solution in step (1) is as follows: 180-190 g / L of caustic soda, and the washing alkali must be clean.

4. The printing method of meta-aramid blended fabric according to claim 3, characterized in that: The step (2) uses a hot melt primer device in combination with a multiple dipping and one padding process to process the cleaned meta-aramid blended fabric, wherein the anti-ultraviolet finishing agent is 60-80 g / L and the flame retardant cross-linking agent is 40-60 g / L; the baking temperature after dipping and padding is 160° C. and the baking time is 3 minutes.

5. The printing method of meta-aramid blended fabric according to claim 4, characterized in that: The dye paste in step (3) is: A: Weight percentage of each raw material of acid dye printing paste: acid dye (100%) 1-8%, sodium alginate paste (8%) 40-50%, sodium hexametaphosphate 1%, HAC 0.5%, the rest is water; B: The weight percentage of each raw material of cationic dye printing paste: cationic dye (100%) 1-8%, cationic paste (10%) 40-50%, sodium hexametaphosphate 1%, HAC 0.1%, and the rest is water.

6. The printing method of meta-aramid blended fabric according to claim 5, characterized in that: Step (4) Before steaming, use a two-roller rolling mill to roll the liquid containing 4%-15% EP-1 dyeing agent, and then saturate steam. The saturated steaming temperature is 100-102°C and the saturated steaming time is 25-30 minutes.

7. The printing method of meta-aramid blended fabric according to claim 6, characterized in that: The washing in step (5) can be carried out in a washing machine immediately after exiting the steamer, including cold washing, soap washing, hot washing, and drying; The soap washing temperature is 90-95°C; Hot washing temperature is 80-90℃; Soaping agent: 3-5 g / L of soaping agent for aramid.