Printing process of brocade and cotton blended camouflage fabric

Abstract

The invention discloses a printing process of a brocade-cotton blended camouflage fabric. The production process comprises the following steps: pretreatment, printing, steaming and baking, reduction soaping and color fixation, sizing, tentering and color fixation, preshrinking and the like. The camouflage printed fabric prepared by the process has the advantages of color fastness to light (dark color grade 6 or more and light color grade 5 or more), composite color fastness to light and sweat (grade 4-5), color fastness to dry rubbing (grade 4-5), color fastness to wet rubbing (grade 2.5-4), color fastness to washing (grade 4-5), color fastness to perspiration (grade 4-5) and color fastness to hot pressing (grade 4-5), excellent color fastness and uniform color fixation. Meanwhile, the produced camouflage fabric can control the reflectivity of light rays in a near-infrared light region (760-1200 nm) within a required range, so that the fabric has excellent infrared monitoring prevention performance and camouflage effect. The seven-color camouflage fabric printing is achieved, colors are richer, the camouflage effect is better, and the requirements of military garments are better met.

Description

Technical Field

[0001] The invention relates to the technical field of textile printing and dyeing, and in particular to a printing process for a nylon-cotton blended camouflage fabric. Background Art

[0002] Nylon (commonly known as nylon) has good wear resistance and high elasticity, while cotton has excellent warmth retention, comfort and breathability. Nylon-cotton blended fabrics organically combine the advantages of both fibers, and have the excellent properties of both fibers, so they are widely used in national defense and military clothing.

[0003] In addition to the requirements for wearing performance, modern military clothing must also have camouflage and concealment functions. Camouflage is a clothing camouflage effect, which is implemented by using paint, dyes and other materials to change the target color and spot pattern. However, with the development of infrared monitoring technology, the camouflage effect of camouflage has gradually disappeared, so it is particularly important to develop camouflage fabrics with anti-infrared monitoring performance. Anti-infrared camouflage fabrics are made through printing and dyeing to have the same or similar infrared reflection ability as the surrounding environment, thereby achieving a camouflage effect. Therefore, the process and materials in the printing and dyeing process of anti-infrared camouflage fabrics are different from those of ordinary fabrics to meet the special requirements of clothing quality indicators.

[0004] At present, nylon camouflage printing mainly uses one or more of acid dyes, disperse dyes, and coatings to solve visible light and near-infrared camouflage. However, due to the differences in the chemical structure and dyeing mechanism of nylon and cotton fibers, when printing on nylon-cotton blended fabrics, multiple dye stains will inevitably occur on the nylon fiber, affecting the color and color fastness of the printing. In addition, due to the poor light resistance of nylon fiber, nylon fiber will turn yellow under long-term exposure to ultraviolet light and sunlight, resulting in poor light fastness of nylon-cotton blended fabrics, and the product quality cannot meet the needs of field combat and training.

[0005] The anti-infrared camouflage printing process for N / C blended woven fabrics disclosed in Chinese patent CN 110004745 B includes the following process flow: singeing, boiling and bleaching → mercerizing → shaping → base color dyeing → printing → baking → auxiliary finishing → pre-shrinking → finished product. The consistency of the printing effect and the stability of the anti-infrared index of this process are easy to control. The boiling and bleaching combined and the paint printing in this process are both environmentally friendly processes, which have energy-saving and emission-reduction effects compared with conventional processes. However, the printing and color fastness (grade 4) of this process still needs to be further improved.

[0006] Therefore, it is still of great significance to explore a printing process for nylon-cotton blended camouflage fabrics with excellent color fastness and anti-infrared monitoring performance to meet the needs of military clothing. Summary of the invention

[0007] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a printing process for nylon-cotton blended camouflage fabrics. The printed fabrics produced by this process have rich colors, significantly improved color fastness, uniform color fixation, and excellent infrared monitoring resistance.

[0008] To achieve the above-mentioned purpose of the invention, the technical solution adopted by the present invention is a printing process for a nylon-cotton blended camouflage fabric, characterized in that the production process comprises: (1) Pretreatment process: a series of pretreatments are carried out on the nylon-cotton blended fabric to remove impurities on the fabric, making the fabric white and soft, with good permeability to meet the wearing requirements, and provide qualified semi-finished products for subsequent printing and finishing.

[0009] (2) Printing: using a printing machine to print the pre-treated fabric under the action of printing paste; (3) steaming and baking, the printed fabric in step (2) is first placed in a steaming machine for steaming and coloring to increase the durability and firmness of the printing, and then placed in a baking machine for baking to promote the combination of dye and fiber and enhance the stability of dyeing; (4) Reduction soaping and color fixing: first, caustic soda and sodium hydrosulfite (sodium dithionite, Na2S2O4) are used to reduce the dye on the surface of the fabric, so that the dye is reduced to leuco sodium salt to dye the fiber, and then oxidized to water-insoluble dye to fix in the fiber; then the fabric is washed with cold water, hydrogen peroxide, and soap respectively. Among them, the soaping step is mainly to remove the floating color on the fiber surface, so that the fiber color is bright and the color fastness is improved; finally, the fabric is immersed in the color fixing liquid for color fixing treatment by adding high-temperature steam washing equipment, and the color fixing liquid is pumped and sprayed by the circulating pump to strengthen the flow of the color fixing liquid and ensure uniform color fixing. The active substances in the color fixing agent can condense with each other to form a three-dimensional mesh film on the fiber surface, which seals the dye, increases the smoothness of the cloth surface, reduces the friction coefficient and is not easy to wear, and further prevents the swelling, dissolution and shedding of the dye during wet friction, thereby improving the washing fastness and wet friction fastness; (5) Stentering and color fixing: the fabric is dipped into an ultrasonic slurry tank containing finishing liquid (including color fixing agent). In this process, the finishing liquid containing color fixing agent is used to further fix the color of the fabric; after drying the fabric, it is stretched and finished by a stentering machine; (6) Preshrinkage: The fabric is finished by mechanical preshrinkage. The fabric is first moistened by spraying steam or water, then mechanically squeezed in the warp direction, and then loosened and dried to obtain the finished fabric. The printing process adopts acid dye and vat dye for printing in the same paste.

[0010] Furthermore, the (1) pre-treatment process includes: (1.1) Spread the fabric and sew it to ensure that the fabric is flat and the edges are aligned; (1.2) Singeing: Singe the grey fabric after finishing to remove the fluff on the surface of the fabric to prevent the fluff from affecting the printing and dyeing effect of the fabric. The burner is straight, the speed is 105~115 m / min, and the cloth width is 155~157 cm; (1.3) Scouring and bleaching: the cotton fabric scouring and bleaching one-bath method is used to scour and bleach the grey fabric after pretreatment to remove impurities on the fabric and provide good conditions for subsequent fabric printing and dyeing. The concentrations of the components in the slurry used are: caustic soda 40-45 g / L, hydrogen peroxide 6-8 g / L, stabilizer 4-6 g / L, high-concentration refining agent 2-4 g / L; the steaming temperature is 95-105℃, the time is 50-70 min, the speed is 30-40 m / min, and the cloth width is 144-146 cm; (1.4) shaping: heat-setting the fabric obtained in step (1.3) using a shaping machine to stabilize the size and shape of the fabric. The heat-setting temperature is 168-172°C, the machine speed is 35-45 m / min, and the cloth width is 152-154 cm; (1.5) Mercerization: Mercerization treatment of fabrics with caustic soda (sodium hydroxide, NaOH) can further improve the surface properties of the fabric, increase its adsorption capacity for dyes, and increase the gloss of the fabric surface. 195~205 g / L of caustic soda is used as the mercerizing liquid, the machine speed is 35~45 m / min, the pH value of the dropped cloth is 7~8, and the dropped cloth width is 143~145 cm.

[0011] Furthermore, in the (2) printing process, the dye category is selected according to factors such as fabric material, fastness requirements and color characteristics, and the dye that meets the corresponding spectral range is screened according to the reflection spectrum value of the corresponding color. The printing process prescription includes: Black dye composition: acid black M-DL, acid navy blue M-CFL, acid red M-GA, vat black GM, vat dark blue VB, vat red FBB, black K-FBB, adhesive; Dark brown dye composition: acid yellow M-CFL, acid navy blue M-CFL, vat brown BR, vat olive R, vat yellow G, coating yellow H-2RC, coating red H-FG, coating blue G31, black K-FBB, adhesive; Dark green dye composition: acid yellow M-CFL, brilliant blue FB-A, reduced olive R, blue C, yellow 33#, green FBB, coating yellow H-2RC, coating red H-FG, coating blue G31, black K-FBB, adhesive; Light brown dye composition: acid yellow M-CFL, acid navy M-CFL, acid red M-GA, vat brown BR, vat olive R, vat yellow G, coating yellow H-2RC, coating red H-FG, coating blue G31, black K-FBB, adhesive; Light green dye composition: acid yellow M-CFL, acid navy M-CFL, acid red M-GA, vat olive R, vat yellow G, vat blue C, coating yellow H-2RC, coating red H-FG, coating blue G31, black K-FBB, adhesive; Gray dye composition: acid yellow M-CFL, acid navy M-CFL, acid red M-GA, vat olive R, vat gray M, vat red FBB, coating yellow H-2RC, coating red H-FG, coating blue G31, black K-FBB, adhesive; Light grey dye composition: acid yellow M-CFL, acid navy M-CFL, acid red M-GA, reduced olive R, coating yellow H-2RC, coating red H-FG, black K-FBB, adhesive; The meaning of the dye name refers to the three-part naming method of dyes. The dye name consists of three parts: the prefix, the color name and the suffix. The suffix uses certain symbols and numbers to illustrate the color, form, special properties and other dyeing properties. The meanings of the dye suffixes involved are as follows: 1) Indicates the color or color quality of the dye: A represents the customary name code of the dye, B represents bluish or cyan, D represents dark color or darker color, F represents pure color, G represents yellowish or greenish, R represents red, and V represents purple; 2) Indicates properties and uses: C represents resistance to chlorine bleaching, H represents heat dyeing or good heat resistance, K represents vat dye cold dyeing method or heat-setting reactive dye, L represents excellent light fastness and solubility of the dye, and M represents mixed color dye.

[0012] Furthermore, in the (3) steaming and baking step, the steaming temperature is 101-103°C, and the time is 25-35 min; the baking temperature is 155-165°C, and the time is 140-160 s, and the vehicle speed is 30-40 m / min.

[0013] Furthermore, in the step (4) of reducing soaping and fixing, the concentrations of the components in the reducing agent used are: 60-65 g / L caustic soda, 105-115 g / L sodium hydrosulfite; the rolling method is 1 tank 1 roll, the temperature display is 140-145°C, and the rolling pressure is 2-4 kg; Then wash the 1st to 4th grids with cold water, then wash the 5th grid with 1 to 2 g / L hydrogen peroxide, and finally wash the 6th to 9th grids with 90 to 95°C hot water soap. The fixing agent model is EFR-01, the fixing temperature is 70~90℃, and the fixing time is 15~25 min.

[0014] Furthermore, in the step of (5) setting, stenting and fixing, the finishing liquid formula used is: hydrophilic softener FK-1236C 40-50 g / L, easy-to-clean agent CTC-SRE80A 10-14 g / L, resin finishing agent FK-705C 55-65 g / L, resin catalyst FK-703C 10-14 g / L, moisture absorbing and quick-drying agent CTC-SRE95 55-65 g / L, multifunctional finishing agent MFA 25-35 g / L, and fixing agent FK-408 40-50 g / L; the temperature is 170-180°C, the overfeed is 1%-3%, the speed is 20-30 m / min, and the cloth width is 152-154 cm.

[0015] Furthermore, in the (6) pre-shrinking step, the machine speed is 30-40 m / min, and the cloth width is 150-152 cm.

[0016] The advantages and beneficial effects of the present invention are: 1. The present invention increases the durability and fastness of printing through the step of steaming flowers; promotes the combination of dye and fiber through the step of baking, and enhances the stability of dyeing; reduces the dye to leuco sodium salt to dye the fiber through reduction treatment, and then oxidizes it to water-insoluble dye, which greatly reduces the solubility of printing dye and allows the dye to be fully fixed to the fabric fiber; removes the floating color on the fiber surface through the step of soaping, so that the fiber color is bright and the color fastness is improved.

[0017] 2. The present invention adopts the above-mentioned printing process, and selects dyes with excellent light fastness for some dyes, so that the printing has good light fastness. The preliminary color fixation after reduction soaping and the further color fixation step during the shaping and stenting are called the "double color fixation" process, so that the dye is fully fixed to the fiber, and a multi-layer film is formed on the fiber surface to prevent the dye from falling off, thereby improving the color fastness of the printed fabric, and the color fastness is up to standard after inspection. At the same time, when soaking the color fixation liquid, the liquid is pumped and sprayed by the circulating pump to strengthen the flow of the color fixation liquid and ensure uniform color fixation. The present invention realizes multi-color printing of nylon-cotton fabrics, light fastness (dark color 6 or more, light color 5 or more), light fastness, sweat composite color fastness (4-5 level), dry friction color fastness (4-5 level), wet friction color fastness (2.5-4 level), washing color fastness (4-5 level), sweat stain color fastness (4-5 level) and hot pressing color fastness (4-5 level).

[0018] 3. The camouflage fabric obtained by the printing process of the present invention can control the reflectivity of light in the near-infrared region (760-1200 nm) within the required range, so that the fabric has excellent anti-infrared monitoring performance and camouflage effect.

[0019] 4. The printing process of the present invention realizes the printing of seven-color camouflage fabrics. Compared with conventional four-color camouflage printing, it has richer colors, stronger adaptability to the environment, wider application range, better camouflage effect, and better meets the needs of military clothing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The present invention is a flow chart of the printing process of the nylon-cotton blended camouflage fabric. DETAILED DESCRIPTION

[0021] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0022] Example 1 In this embodiment, a printing process for a nylon-cotton blended camouflage fabric is described by referring to Figure 1 , the production process includes the following steps: (1) Pre-treatment process, which includes: (1.1) Grey cloth, nylon-cotton blended twill fabric, blending ratio is N50 / C50, yarn count is 32 / 2×32 / 2, density is 67×55; (1.2) Spread the fabric and sew; (1.3) Singeing: The grey fabric after finishing is singed, the singeing machine has a straight burner, a machine speed of 110 m / min, and a cloth width of 156 cm; (1.4) Scouring and bleaching: the grey cloth after pretreatment was scourged and bleached by the one-bath scouring and bleaching method of nylon-cotton fabric. The concentrations of the components in the slurry used were: caustic soda 42 g / L, hydrogen peroxide 7 g / L, stabilizer 5 g / L, high-concentration refining agent 3 g / L; the steaming temperature was 100℃, the time was 60 min, the speed was 35 m / min, and the cloth width was 145 cm; (1.5) Setting: the fabric obtained in step (1.4) is heat-set using a setting machine at a temperature of 170°C, a machine speed of 40 m / min, and a cloth width of 153 cm; (1.6) Mercerization: Use 200 g / L caustic soda as the mercerizing liquid to mercerize the fabric. The machine speed is 40 m / min, the pH value of the drop cloth is 7.5, and the drop cloth width is 144 cm.

[0023] (2) Printing process: using a printing machine to print the fabric under the action of printing paste. The printing process formula includes: Black dye composition: acid black M-DL 9 g / L, acid navy blue M-CFL 9 g / L, acid red M-GA 4.2 g / L, vat black GM 23 g / L, vat dark blue VB 6 g / L, vat red FBB 5.5 g / L, black K-FBB 8 g / L, binder 120 g / L; Dark brown dye composition: acid yellow M-CFL 18 g / L, acid navy blue M-CFL 9 g / L, vat brown BR 48 g / L, vat olive R 3 g / L, vat yellow G 2 g / L, coating yellow H-2RC 4 g / L, coating red H-FG 2.5 g / L, coating blue G312 g / L, black K-FBB 2 g / L, adhesive 120 g / L; Dark green dye composition: acid yellow M-CFL 18 g / L, brilliant blue FB-A 6 g / L, reduced olive R 35 g / L, blue C13 g / L, yellow 33# 17 g / L, green FBB 2 g / L, coating yellow H-2RC 3 g / L, coating red H-FG 0.7 g / L, coating blue G31 2 g / L, black K-FBB 12 g / L, adhesive 120 g / L; Light brown dye composition: acid yellow M-CFL 1.2 g / L, acid navy blue M-CFL 1.7 g / L, acid red M-GA0.4 g / L, vat brown BR 0.6 g / L, vat olive R 24 g / L, vat yellow G 2.5 g / L, coating yellow H-2RC 3 g / L, coating red H-FG 2 g / L, coating blue G31 1.5 g / L, black K-FBB 2.5 g / L, adhesive 120 g / L; Light green dye composition: acid yellow M-CFL 1.2 g / L, acid navy blue M-CFL 1.7 g / L, acid red M-GA0.1 g / L, vat olive R 18 g / L, vat yellow G 1.4 g / L, vat blue C 1.5 g / L, coating yellow H-2RC 0.6 g / L, coating red H-FG 0.2 g / L, coating blue G31 1.3 g / L, black K-FBB 0.3 g / L, adhesive 120 g / L; Gray dye composition: acid yellow M-CFL 1 g / L, acid navy blue M-CFL 1 g / L, acid red M-GA 0.3 g / L, vat olive R 6.5 g / L, vat gray M 3 g / L, vat red FBB 0.7 g / L, coating yellow H-2RC 0.3 g / L, coating red H-FG 0.4 g / L, coating blue G31 0.3 g / L, black K-FBB 0.3 g / L, adhesive 120 g / L; The light gray dye composition is: acid yellow M-CFL 2 g / L, acid navy blue M-CFL 0.15 g / L, acid red M-GA0.38 g / L, reduced olive R 0.4 g / L, paint yellow H-2RC 0.7 g / L, paint red H-FG 0.6 g / L, black K-FBB 0.4g / L, and adhesive 120 g / L.

[0024] (3) Steaming and baking: The fabrics were steamed using a steamer at a temperature of 102 °C for 30 min; the fabrics were baked using a baking machine at a temperature of 160 °C for 150 s at a speed of 35 m / min.

[0025] (4) Reduction soaping and color fixing: first, caustic soda and hydrosulfite are used to reduce the dye on the surface of the fabric. The concentrations of the components in the reducing agent are: caustic soda 62 g / L, hydrosulfite 110 g / L; the rolling method is 1 tank 1 rolling, the temperature meter is 142 °C, and the rolling pressure is 3 kg; Then wash the fabric with cold water for 1-4 squares, then wash it with 1.5 g / L hydrogen peroxide for 5 squares, and then wash it with hot water soap at 92°C for 6-9 squares; Finally, the fabric was fixed with a high-temperature steam washing device and immersed in a color fixing agent. The color fixing agent model was EFR-01, the color fixing temperature was 80°C, and the time was 20 min.

[0026] (5) Stentering and color fixing: the fabric is immersed in an ultrasonic slurry tank containing finishing liquid (including color fixing agent). In this process, the finishing liquid containing color fixing agent is used to further fix the fabric. The finishing liquid formula used is: hydrophilic softener FK-1236C 45 g / L, easy stain remover CTC-SRE80A 12 g / L, resin finishing agent FK-705C 60 g / L, resin catalyst FK-703C 12 g / L, moisture absorption and quick drying agent CTC-SRE95 60 g / L, multifunctional finishing agent MFA 30 g / L, and color fixing agent FK-408 45 g / L. After drying the fabric, it is stretched and finished by a stentering machine at a temperature of 175°C, an overfeed of 2%, a speed of 25 m / min, and a cloth drop width of 153 cm.

[0027] (6) Preshrinkage: The fabric is pre-shrinked by mechanical pre-shrinkage finishing method, with a machine speed of 35 m / min and a cloth width of 151 cm to obtain a finished nylon-cotton blended camouflage printed fabric.

[0028] The color fastness test of the printed fabric prepared in Example 1 was carried out: Color fastness to light: The color fastness to light of the fabric was tested in accordance with GB / T8427-2008 “Textiles - Tests for color fastness - Color fastness to artificial light: Xenon arc fading lamp”. The test results are shown in Table 1.

[0029] Composite color fastness to light and perspiration: The composite color fastness to light and perspiration of the fabric was tested in accordance with GB / T14576-2009 “Textiles - Tests for color fastness - Composite color fastness to light and perspiration”. The test results are shown in Table 1.

[0030] Color fastness to rubbing: The color fastness to rubbing of the fabric was tested in accordance with GB / T3920-2008 “Textiles - Tests for Color Fastness - Color Fastness to Rubbing”. The test results are shown in Table 1.

[0031] Color fastness to washing: The color fastness to washing with soap of the fabric was tested according to GB / T3921-2008 “Textiles - Tests for Color Fastness - Color Fastness to Washing with Soap”. The test results are shown in Table 1.

[0032] Color fastness to perspiration: The color fastness to perspiration of the fabric was tested in accordance with GB / T3922-2013 “Textiles - Tests for Color Fastness - Color Fastness to Perspiration”. The test results are shown in Table 1.

[0033] Color fastness to hot pressing: The color fastness to hot pressing of the fabric was tested in accordance with GB / T6152-1997 “Textiles - Tests for Color Fastness - Color Fastness to Hot Pressing”. The test results are shown in Table 1.

[0034] Table 1 Color fastness test results of printed fabrics prepared in Example 1

[0035] As can be seen from Table 1, the printing process of the nylon-cotton blended camouflage fabric of the present invention improves the color fastness to light (dark color above level 6, light color above level 5), light and sweat composite color fastness (level 4-5), dry friction color fastness (level 4-5), wet friction color fastness (level 2.5-4), washing color fastness (level 4-5), perspiration color fastness (level 4-5) and hot pressing color fastness (level 4-5) of the fabric. The color fastness to light of the printed fabric is relatively high, and the product quality can better meet the needs of military clothing.

[0036] The anti-infrared monitoring performance test was carried out on the printed fabric prepared in Example 1: Table 2 Anti-infrared monitoring performance test results of the printed fabric prepared in Example 1

[0037] As can be seen from Table 2, the printing process of the nylon-cotton blended camouflage fabric of the present invention can control the reflectivity of 760 nm, 840 nm, 960 nm, and 1200 nm light within the required range, so that the fabric has excellent anti-infrared monitoring performance and camouflage effect.

[0038] Example 2 The difference between the process parameters of Example 2 and Example 1 is: The singeing machine has a straight fire mouth, a machine speed of 105 m / min, and a cloth width of 155 cm; the concentrations of the components in the slurry used for bleaching are: caustic soda 40 g / L, hydrogen peroxide 6 g / L, stabilizer 4 g / L, high-concentration refining agent 2 g / L, the steaming temperature is 95℃, the time is 50 min, the machine speed is 30 m / min, and the cloth width is 144 cm; the heat setting treatment temperature is 168℃, the machine speed is 35m / min, and the cloth width is 152 cm; the mercerization treatment uses caustic soda with a concentration of 195 g / L as the mercerizing liquid, and the fabric is mercerized at a speed of 35 m / min, the pH value of the cloth is 7, and the cloth width is 143 cm; the steaming temperature is 101℃, the time is 25min; the baking temperature is 155℃, the time is 140 s, the machine speed is 30 m / min; in the reduction soaping and color fixing step, the concentrations of the components in the reducing agent are: caustic soda 60 g / L, insurance powder 105 g / L, the rolling method is 1 tank 1 roll, the temperature display is 140℃, the rolling pressure is 2 kg, then the fabric is first washed with cold water for 1~4 grids, then washed with hydrogen peroxide with a concentration of 1 g / L for 5 grids, and then washed with hot water soap at a temperature of 90℃ for 6~9 grids, and finally the fabric is fixed by soaking in the color fixing agent using an additional high-temperature steam washing equipment, the color fixing temperature is 70℃, and the time is 15 min; in the setting and stenting color fixing step, the finishing liquid formula used is: hydrophilic softener FK-1236C 40 g / L, easy decontamination agent CTC-SRE80A 10 g / L, resin finishing agent FK-705C 55 g / L, resin catalyst FK-703C 10 g / L, moisture absorption and quick drying agent CTC-SRE95 55 g / L, multifunctional finishing agent MFA 25 g / L, fixing agent FK-408 40g / L, the fabric was dried and then stretched and finished by a tentering machine, the temperature was 170℃, overfeeding was 1%, the speed was 20 m / min, and the cloth width was 152 cm; in the pre-shrinking step, the speed was 30 m / min, the cloth width was 150 cm, and the finished nylon-cotton blended camouflage printed fabric was obtained.

[0039] The color fastness test of the printed fabric prepared in Example 2 was carried out: Color fastness to light: The color fastness to light of the fabric was tested in accordance with GB / T8427-2008 “Textiles—Tests for color fastness—Color fastness to artificial light: Xenon arc fading lamp”. The test results are shown in Table 3.

[0040] Composite color fastness to light and perspiration: The composite color fastness to light and perspiration of the fabric was tested in accordance with GB / T14576-2009 “Textiles - Tests for color fastness - Composite color fastness to light and perspiration”. The test results are shown in Table 3.

[0041] Color fastness to rubbing: The color fastness to rubbing of the fabric was tested in accordance with GB / T3920-2008 “Textiles - Tests for Color Fastness - Color Fastness to Rubbing”. The test results are shown in Table 3.

[0042] Color fastness to washing: The color fastness to washing with soap of the fabric was tested according to GB / T3921-2008 “Textiles - Tests for Color Fastness - Color Fastness to Washing with Soap”. The test results are shown in Table 3.

[0043] Color fastness to perspiration: The color fastness to perspiration of the fabric was tested in accordance with GB / T3922-2013 “Textiles - Tests for Color Fastness - Color Fastness to Perspiration”. The test results are shown in Table 3.

[0044] Color fastness to hot pressing: The color fastness to hot pressing of the fabric was tested in accordance with GB / T6152-1997 “Textiles - Tests for Color Fastness - Color Fastness to Hot Pressing”. The test results are shown in Table 3.

[0045] Table 3 Color fastness test results of printed fabrics prepared in Example 2

[0046] As can be seen from Table 3, the printing process of the nylon-cotton blended camouflage fabric of the present invention improves the color fastness to light (dark color above level 6, light color above level 5), light and sweat composite color fastness (level 4-5), dry friction color fastness (level 4-5), wet friction color fastness (level 2.5-4), washing color fastness (level 4-5), perspiration color fastness (level 4-5) and hot pressing color fastness (level 4-5). The printed fabric has high color fastness to light, and the product quality can meet the requirements of military clothing.

[0047] The anti-infrared monitoring performance test was carried out on the printed fabric prepared in Example 2: Table 4 Anti-infrared monitoring performance test results of the printed fabric prepared in Example 2

[0048] It can be seen from Table 4 that the printing process of the nylon-cotton blended camouflage fabric of the present invention can control the reflectivity of 760 nm, 840 nm, 960 nm, and 1200 nm light within the required range, so that the fabric has excellent anti-infrared monitoring performance and camouflage effect.

[0049] Example 3 The difference between the process parameters of Example 3 and Example 1 is: The singeing machine has a straight fire mouth, a machine speed of 115 m / min, and a cloth width of 157 cm; the concentrations of the components in the slurry used for bleaching are: caustic soda 45 g / L, hydrogen peroxide 8 g / L, stabilizer 6 g / L, high-concentration refining agent 4 g / L, the steaming temperature is 105℃, the time is 70 min, the machine speed is 40 m / min, and the cloth width is 146 cm; the heat setting treatment temperature is 172℃, the machine speed is 45 m / min, and the cloth width is 154 cm; the mercerizing treatment uses caustic soda with a concentration of 205 g / L as the mercerizing liquid, the fabric is mercerized, the machine speed is 45 m / min, the pH value of the cloth is 8, and the cloth width is 145 cm; the steaming temperature is 103℃, the time is 35min; the baking temperature is 165℃, the time is 160 s, the machine speed is 40 m / min; in the reduction soaping and color fixing step, the concentrations of the components in the reducing agent are: caustic soda 65 g / L, insurance powder 115 g / L, the rolling method is 1 tank 1 roll, the temperature display is 145℃, the rolling pressure is 4 kg, then the fabric is first washed with cold water for 1~4 grids, then washed with hydrogen peroxide with a concentration of 2 g / L for 5 grids, and then washed with hot water soap at a temperature of 95℃ for 6~9 grids, and finally the fabric is fixed by soaking in the color fixing agent using an additional high-temperature steam washing equipment, the color fixing temperature is 90℃, and the time is 25 min; in the setting and stenting color fixing step, the finishing liquid formula used is: hydrophilic softener FK-1236C 50 g / L, easy stain remover CTC-SRE80A 15 g / L, resin finishing agent FK-705C 65 g / L, resin catalyst FK-703C 15 g / L, moisture absorbing quick-drying agent CTC-SRE95 65 g / L, multifunctional finishing agent MFA 35 g / L, fixing agent FK-408 50g / L, the fabric was dried and then stretched and finished by a tentering machine, the temperature was 180℃, overfeeding was 3%, the speed was 30 m / min, and the cloth width was 154 cm; in the pre-shrinking step, the speed was 40 m / min, the cloth width was 152 cm, and the finished nylon-cotton blended camouflage printed fabric was obtained.

[0050] The color fastness test of the printed fabric prepared in Example 3 was carried out: Color fastness to light: The color fastness to light of the fabric was tested in accordance with GB / T8427-2008 “Textiles—Tests for color fastness—Color fastness to artificial light: Xenon arc fading lamp”. The test results are shown in Table 5.

[0051] Composite color fastness to light and perspiration: The composite color fastness to light and perspiration of the fabric was tested in accordance with GB / T14576-2009 “Textiles - Tests for color fastness - Composite color fastness to light and perspiration”. The test results are shown in Table 5.

[0052] Color fastness to rubbing: The color fastness to rubbing of the fabric was tested in accordance with GB / T3920-2008 “Textiles - Tests for Color Fastness - Color Fastness to Rubbing”. The test results are shown in Table 5.

[0053] Color fastness to washing: The color fastness to washing with soap of the fabric was tested according to GB / T3921-2008 “Textiles - Tests for Color Fastness - Color Fastness to Washing with Soap”. The test results are shown in Table 5.

[0054] Color fastness to perspiration: The color fastness to perspiration of the fabric was tested in accordance with GB / T3922-2013 “Textiles - Tests for Color Fastness - Color Fastness to Perspiration”. The test results are shown in Table 5.

[0055] Color fastness to hot pressing: The color fastness to hot pressing of the fabric was tested in accordance with GB / T6152-1997 “Textiles - Tests for Color Fastness - Color Fastness to Hot Pressing”. The test results are shown in Table 5.

[0056] Table 5 Color fastness test results of printed fabrics prepared in Example 3

[0057] As can be seen from Table 5, the printing process of the nylon-cotton blended camouflage fabric of the present invention improves the color fastness to light (dark color above level 6, light color above level 5), light and sweat composite color fastness (level 4-5), dry friction color fastness (level 4-5), wet friction color fastness (level 2.5-4), washing color fastness (level 4-5), perspiration color fastness (level 4-5) and hot pressing color fastness (level 4-5). The printed fabric has high color fastness to light, and the product quality can meet the requirements of military clothing.

[0058] The anti-infrared monitoring performance test was carried out on the printed fabric prepared in Example 3: Table 6 Anti-infrared monitoring performance test results of the printed fabric prepared in Example 3

[0059] It can be seen from Table 6 that the printing process of the nylon-cotton blended camouflage fabric of the present invention can control the reflectivity of 760 nm, 840 nm, 960 nm, and 1200 nm light within the required range, so that the fabric has excellent anti-infrared monitoring performance and camouflage effect.

[0060] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A printing process for nylon-cotton blended camouflage fabric, characterized in that: The production process comprises the following production steps: (1) Pretreatment process: a series of pretreatments are performed on nylon-cotton blended fabrics; (2) Printing: using a printing machine to print the pre-treated fabric under the action of printing paste; (3) steaming and baking, the printed fabric in step (2) is first placed in a steaming machine for steaming and coloring, and then placed in a baking machine for baking; (4) Reduction soaping and color fixing: first, use caustic soda and insurance powder to reduce the dye on the surface of the fabric; then wash the fabric with cold water, hydrogen peroxide, and soap; finally, soak the fabric in the color fixing solution to fix the fabric; (5) Stentering and color fixing: the fabric is dipped into a finishing liquid containing a color fixing agent to further fix the color of the fabric; the fabric is dried and then stretched at high temperature by a stentering machine; (6) Preshrinkage: The fabric is pre-shrinked by mechanical pre-shrinkage. The fabric is first moistened by steam or water spray, then mechanically squeezed in the warp direction, and then loosened and dried to obtain the finished fabric. The printing process adopts acid dye and vat dye for printing in the same paste.

2. The printing process of nylon-cotton blended camouflage fabric according to claim 1, characterized in that: The pre-treatment process in step (1) comprises: (1.1) Spreading the fabric and sewing: Spread the fabric flat and sew; (1.2) Singeing: The grey fabric after finishing is singed, the singeing machine has a straight burner, the machine speed is 105~115 m / min, and the cloth width is 155~157 cm; (1.3) Scouring and bleaching: The pre-treated grey cloth is scourged and bleached using the one-bath scouring and bleaching method. The concentrations of the components in the slurry used are: caustic soda 40-45 g / L, hydrogen peroxide 6-8 g / L, stabilizer 4-6 g / L, high-concentration refining agent 2-4 g / L; the steaming temperature is 95-105℃, the time is 50-70 min, the speed is 30-40 m / min, and the cloth width is 144-146 cm; (1.4) Setting: The fabric obtained in step (1.3) is heat-set using a setting machine, the heat-setting temperature is 168-172°C, the machine speed is 35-45 m / min, and the cloth width is 152-154 cm; (1.5) Mercerizing: Mercerize the fabric with caustic soda, using 195~205 g / L caustic soda as the mercerizing liquid, the machine speed is 35~45 m / min, the pH value of the cloth is 7~8, and the cloth width is 143~145 cm.

3. The printing process of nylon-cotton blended camouflage fabric according to claim 1, characterized in that: In the step (2) of printing process, the printing process recipe includes: Black dye composition: acid black M-DL, acid navy blue M-CFL, acid red M-GA, vat black GM, vat dark blue VB, vat red FBB, black K-FBB, adhesive; Dark brown dye composition: acid yellow M-CFL, acid navy blue M-CFL, vat brown BR, vat olive R, vat yellow G, coating yellow H-2RC, coating red H-FG, coating blue G31, black K-FBB, adhesive; Dark green dye composition: acid yellow M-CFL, brilliant blue FB-A, reduced olive R, blue C, yellow 33#, green FBB, coating yellow H-2RC, coating red H-FG, coating blue G31, black K-FBB, adhesive; Light brown dye composition: acid yellow M-CFL, acid navy M-CFL, acid red M-GA, vat brown BR, vat olive R, vat yellow G, coating yellow H-2RC, coating red H-FG, coating blue G31, black K-FBB, adhesive; Light green dye composition: acid yellow M-CFL, acid navy M-CFL, acid red M-GA, vat olive R, vat yellow G, vat blue C, coating yellow H-2RC, coating red H-FG, coating blue G31, black K-FBB, adhesive; Gray dye composition: acid yellow M-CFL, acid navy M-CFL, acid red M-GA, vat olive R, vat gray M, vat red FBB, coating yellow H-2RC, coating red H-FG, coating blue G31, black K-FBB, adhesive; The light grey dye is composed of acid yellow M-CFL, acid navy blue M-CFL, acid red M-GA, vat olive R, coating yellow H-2RC, coating red H-FG, black K-FBB and adhesive.

4. The printing process of nylon-cotton blended camouflage fabric according to claim 1, characterized in that: In the step (3) of steaming and baking the flowers, the steaming temperature is 101-103°C, the time is 25-35 min; the baking temperature is 155-165°C, the time is 140-160 s, and the vehicle speed is 30-40 m / min.

5. The printing process of nylon-cotton blended camouflage fabric according to claim 1, characterized in that: In the step (4) of reducing soaping and fixing, the concentrations of the components in the reducing agent used are: 60-65 g / L caustic soda, 105-115 g / L sodium hydrosulfite; the rolling method is one tank and one roll, the temperature display is 140-145°C, and the rolling pressure is 2-4 kg; Then wash the 1st to 4th grids with cold water, then wash the 5th grid with 1 to 2 g / L hydrogen peroxide, and finally wash the 6th to 9th grids with 90 to 95°C hot water soap. The color fixing agent model is EFR-01, the color fixing temperature is 70-90°C, and the time is 15-25 min; the color fixing treatment step is carried out by adding high-temperature steam washing equipment.

6. The printing process of nylon-cotton blended camouflage fabric according to claim 1, characterized in that: In the step (5) of setting and stentering and fixing, the finishing liquid formula used is: hydrophilic softener FK-1236C 40-50 g / L, easy-to-clean agent CTC-SRE80A 10-14 g / L, resin finishing agent FK-705C 55-65 g / L, resin catalyst FK-703C 10-14 g / L, moisture absorbing and quick-drying agent CTC-SRE95 55-65 g / L, multifunctional finishing agent MFA 25-35 g / L, and fixing agent FK-408 40-50 g / L; the stentering finishing temperature used is 170-180°C, the overfeed is 1%-3%, the speed is 20-30 m / min, and the cloth drop width is 152-154 cm; the slurry tank used to hold the finishing liquid is an ultrasonic slurry tank.

7. The printing process of nylon-cotton blended camouflage fabric according to claim 1, characterized in that: During the pre-shrinking in step (6), the machine speed is 30-40 m / min and the cloth width is 150-152 cm.

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