Printing preparation method of meta-position pure aramid fiber fabric

Abstract

The invention discloses a printing preparation method of a meta-position pure aramid fiber fabric. The printing preparation method comprises the following specific steps: (1) lightly scouring the meta-position pure aramid fiber fabric on a scouring machine, washing with water and drying; (2) padding the meta-position pure aramid fiber fabric subjected to light refining treatment by using a hot melting bottoming machine and adopting a multi-dipping and one-rolling process, and adding an anti-ultraviolet finishing agent and a flame-retardant cross-linking agent into dipping treatment liquid, so as to further improve the anti-solarization capability of the aramid fiber fabric; (3) printing each color spot of the meta-position pure aramid fiber fabric by using a rotary screen printing machine and two color pastes; the two dye pastes are disperse dye printing paste and cationic dye printing paste; (4) performing saturated steaming color fixation by using a long-ring steamer or a long-ring bottomless steamer; and (5) washing the color-fixed meta-position pure aramid fiber fabric by using a soaping machine, wherein the washing comprises cold washing, hot washing, soaping and drying. 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 preparation method, in particular to a meta-pure aramid fabric printing preparation method. 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, with 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 high flame retardant combat clothing fabrics also have near-infrared detection and certain nuclear radiation protection capabilities. However, aramid fabrics are generally difficult to dye and print. At present, they are mainly used for aramid fabric monochrome clothing by carrier airflow dyeing or aramid stock solution coloring. At present, dye printing methods for aramid fabrics are urgently needed to enable meta-aramid products to be more widely used.

[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 dye is steamed in a tank steamer, and after fixing, it is washed with water and soaped to obtain the aramid fabric printing product.

[0005] This process has the following disadvantages: (1) This method does not consider the problem of low light fastness of aramid fabrics, especially when printing light spots, the light fastness level is particularly low; (2) This method of printing mainly involves adding a dyeing agent to the cationic dye paste. After printing, a tank steamer is used, with a 400-meter roll package, 102°C for 15 minutes, or 172°C for 8 minutes. It is an intermittent production method, with a light dye color and a low production speed. (3) It only describes the use of cationic dyes for printing aramid and cotton blended fabrics. This patent does not mention that disperse dyes can also be used for printing meta-pure aramid fabrics. Summary of the invention

[0006] The object of the present invention is to provide a printing preparation method for meta-pure aramid fabric to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions: A meta-pure aramid fabric printing preparation method, the specific steps are as follows: (1) The meta-pure aramid fabric is gently scoured, washed and dried on a scouring machine, mainly to remove the weaving oil; (2) Use a hot melt primer machine to adopt a multi-immersion and one-rolling process to immerse and roll the meta-pure aramid fabric that has been lightly refined. Add an anti-ultraviolet finishing agent and a flame retardant cross-linking agent to the immersion treatment liquid to further improve the sun resistance of the aramid fabric; (3) Using a rotary screen printing machine and two color pastes to print various color spots on the meta-pure aramid fabric; the two dye pastes are disperse dye printing paste and cationic dye printing paste; (4) Two types of steamers (long ring steamer or long ring bottomless steamer) can be used for saturated steam fixation; (5) Using a soap washing machine to wash the meta-pure aramid fabric after color fixation, including: cold washing, hot washing, soap washing, and drying, to obtain a finished meta-pure aramid printed fabric.

[0008] As a further solution of the present invention: in the above step (1), the recipe used for light scouring in the scouring equipment is: 5-10 g / L of ordinary refining agent, 5-10 g / L of degreasing agent and 0.3 g / L of whitening agent CPN for padding, and steaming for 30-45 minutes.

[0009] As a further solution of the present invention: in the above step (2), the anti-ultraviolet finishing agent is 60-80 g / L, the flame retardant cross-linking agent is 40-60 g / L, and the baking is carried out at 160° C. for 3 minutes.

[0010] As a further solution of the present invention: in step (2), the drying temperature is 160° C. and the drying time is 3 minutes.

[0011] As a further solution of the present invention: In the above step (3), the two dye pastes used in the rotary screen printing machine are formulated as follows: The weight percentage of each raw material of disperse dye printing paste: disperse dye (100%) 1-8%, NDY paste (8%) 40-50%, sodium hexametaphosphate 1%, HAC 0.1%, and the rest is water; The weight percentage of each raw material of the cationic dye printing paste is: cationic dye (100%) 1-8%, cationic paste (10%) 40-50%, sodium hexaphosphate 1%, HAC 0.1%, and the rest is water.

[0012] As a further solution of the present invention: in step (4), the two steamers are a long-loop steamer and a long-loop bottomless steamer, and a saturated steaming process of a long-loop steamer or a long-loop bottomless steamer is used. Before steaming, a two-roller rolling mill is used, and the meta-aramid printed fabric is dipped in a fixing solution containing 4%-15% of EP-1 dye guide agent, and saturated steaming is performed in a wet state for steam fixing, the temperature is 100-102°C, and the steam fixing time is 15-30 minutes, and only the back side of the meta-aramid printed fabric contacts the guide roller.

[0013] As a further solution of the present invention: in step (5), the hot washing temperature is 80-90°C, and the soap washing temperature is 90-95°C.

[0014] As a further solution of the present invention: in step (5), the soaping agent is 3-5 g / L of a soaping agent specifically for aramid.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The 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.

[0016] In the present invention, no dyeing agent is added after the disperse dye paste or cationic dye paste is printed, the printing machine has no irritating odor, and the operating environment is good.

[0017] The present invention adopts a long-ring evaporator or a bottomless long-ring evaporator, and the padding dyeing agent EP-1 before evaporation can obtain a very deep color yield and fullness, and can realize the continuous industrial production of meta-pure aramid printing. DETAILED DESCRIPTION

[0018] 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 creative work are within the scope of protection of the present invention.

[0019] In an embodiment of the present invention, a meta-pure aramid fabric printing preparation method is provided, and the specific steps are as follows: (1) The meta-pure aramid fabric is gently scoured, washed and dried on a scouring machine, mainly to remove the weaving oil; (2) Use a hot melt primer machine to adopt a multi-immersion and one-rolling process to immerse and roll the meta-pure aramid fabric that has been lightly refined. Add an anti-ultraviolet finishing agent and a flame retardant cross-linking agent to the immersion treatment liquid to further improve the sun resistance of the aramid fabric; (3) Using a rotary screen printing machine and two color pastes to print various color spots on meta-pure aramid fabric; The two dye pastes used are as follows: Disperse dye printing paste; Cationic dye printing paste; (4) Two types of steamers (long ring steamer or long ring bottomless steamer) can be used for saturated steam fixation; (5) Using a soap washing machine to wash the meta-pure aramid fabric after color fixation, including: cold washing, hot washing (80-90°C), soap washing (90-95°C), and drying, to obtain a finished meta-pure aramid printed fabric.

[0020] Specifically, In the above step (1), the recipe used for light scouring in the scouring equipment is: padding with 5-10 g / L of ordinary refining agent, 5-10 g / L of degreasing agent and 0.3 g / L of whitening agent CPN, and steaming for 30-45 minutes. Aramid fabrics are generally not sized, and only need to be washed to remove the oil agent and slightly whiten.

[0021] In the above step (2), the anti-ultraviolet finishing agent is 60-80 g / L, the flame retardant cross-linking agent is 40-60 g / L, and the baking is carried out at 160° C. for 3 minutes.

[0022] In step (2), the drying temperature is 160° C. and the drying time is 3 minutes.

[0023] In the above step (3), the two dye pastes used in the rotary screen printing machine are formulated as follows: The weight percentage of each raw material of disperse dye printing paste: disperse dye (100%) 1-8%, NDY paste (8%) 40-50%, sodium hexametaphosphate 1%, HAC 0.1%, and the rest is water; The weight percentage of each raw material of the cationic dye printing paste is: cationic dye (100%) 1-8%, cationic paste (10%) 40-50%, sodium hexaphosphate 1%, HAC 0.1%, and the rest is water.

[0024] In step (4), a long-loop evaporation or long-loop bottomless evaporation saturated steaming process is used. Before steaming, a two-roller surface rolling mill is used, and the meta-aramid printed fabric is dipped in a fixing solution containing 4%-15% of EP-1 dye guide agent. The fabric is saturated with steam in a wet state for steam fixing. The temperature is 100-102° C. and the steam fixing time is 15-30 minutes. Only the back side of the meta-aramid printed fabric contacts the guide roller.

[0025] In step (5), the washing process can be performed by immediately entering a washing machine after exiting the steamer, and then cold washing, soap washing, hot washing, and drying.

[0026] Soaping agent: 3-5 g / L of soaping agent for aramid.

[0027] The meta-pure aramid fabric printed with disperse dye printing paste or cationic dye printing paste is steamed and fixed on the steaming and fixing equipment specially used for aramid fabric to obtain deep and full color.

[0028] The process is as follows: After drying in the printing machine, the fabric → feeds the liquid padding machine → enters the long ring steamer (only the back side of the printing contacts the guide roller) for saturated steaming for 15-30 minutes → cold water washing tank → soap washing → hot water washing → drying.

[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 method for preparing meta-pure aramid fabric printing, characterized in that: The specific steps are as follows: (1) The meta-pure aramid fabric is gently scoured, washed and dried on a scouring machine, mainly to remove the weaving oil; (2) Use a hot melt primer machine to adopt a multi-immersion and one-rolling process to immerse and roll the meta-pure aramid fabric that has been lightly refined. Add an anti-ultraviolet finishing agent and a flame retardant cross-linking agent to the immersion treatment liquid to further improve the sun resistance of the aramid fabric; (3) Using a rotary screen printing machine and two color pastes to print various color spots on the meta-pure aramid fabric; the two dye pastes are disperse dye printing paste and cationic dye printing paste; (4) Use a long-ring steamer or a long-ring bottomless steamer for saturated steam fixation; (5) Using a soap washing machine to wash the meta-pure aramid fabric after color fixation, including: cold washing, hot washing, soap washing, and drying, to obtain a finished meta-pure aramid printed fabric.

2. The method for preparing meta-pure aramid fabric printing according to claim 1, characterized in that: In the above step (1), the recipe used for light scouring in the scouring equipment is: 5-10 g / L of ordinary refining agent, 5-10 g / L of degreasing agent and 0.3 g / L of whitening agent CPN for padding, and steaming for 30-45 minutes.

3. The method for preparing meta-pure aramid fabric printing according to claim 1 or 2, characterized in that: In the above step (2), the anti-ultraviolet finishing agent is 60-80 g / L, the flame retardant cross-linking agent is 40-60 g / L, and the baking is carried out at 160° C. for 3 minutes.

4. The method for preparing meta-pure aramid fabric printing according to claim 3, characterized in that: In step (2), the drying temperature is 160° C. and the drying time is 3 minutes.

5. The method for preparing meta-pure aramid fabric printing according to claim 4, characterized in that: In the above step (3), the two dye pastes used in the rotary screen printing machine are formulated as follows: The weight percentage of each raw material of disperse dye printing paste: disperse dye (100%) 1-8%, NDY paste (8%) 40-50%, sodium hexametaphosphate 1%, HAC 0.1%, and the rest is water; The weight percentage of each raw material of the cationic dye printing paste is: cationic dye (100%) 1-8%, cationic paste (10%) 40-50%, sodium hexaphosphate 1%, HAC 0.1%, and the rest is water.

6. The method for preparing meta-pure aramid fabric printing according to claim 5, characterized in that: In step (4), a long-loop evaporation or long-loop bottomless evaporation saturated steaming process is used. Before steaming, a two-roller rolling mill is used. The meta-aramid printed fabric is dipped in a fixing solution containing 4% to 15% of EP-1 dye guide agent, and saturated steam is used for steam fixing in a wet state. The temperature is 100 to 102° C. and the steam fixing time is 15 to 30 minutes. Only the back side of the meta-aramid printed fabric contacts the guide roller.

7. The method for preparing meta-pure aramid fabric printing according to claim 6, characterized in that: In step (5), the hot washing temperature is 80-90°C, and the soap washing temperature is 90-95°C.

8. The method for preparing meta-pure aramid fabric printing according to claim 7, characterized in that: In step (5), the soaping agent is 3-5 g / L of a soaping agent specifically for aramid.