Printing process of polyester, vinylon and cotton blended camouflage fabric with reverse color penetration prevention function

Abstract

The invention discloses a printing process of a polyester, vinylon and cotton blended camouflage fabric with a reverse anti-color-transmission function. The production process comprises the following steps: a pretreatment process, rolling of a waterproof agent on a single side of the reverse side, a printing process, baking and shaping, reduction and soaping, an after-finishing process and the like. According to the process, a waterproof agent is rolled on the reverse side of the fabric, so that the reverse side of the fabric has a water-repellent effect, color paste permeation is weakened, and reverse side permeation of dye in the subsequent printing process is prevented; the dyeing effect of the printing paste on the front side of the fabric is not influenced, and the permeation of the paste is effectively weakened, so that the printing effect that the front pattern is clear and the back is non-transparent is achieved; meanwhile, in the reduction soaping step, a waterproof agent on the reverse side of the fabric effectively maintains the printing effect, and the stability and quality of the printing effect are ensured. By adopting the disperse / vat dye one-paste printing process, the printed fabric is good in hand feeling and air permeability, five-color camouflage fabric printing is achieved, colors are rich, the camouflage effect is good, 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 reverse-side anti-translucent polyester-cotton blended camouflage fabric. Background Art

[0002] Polyester (polyester fiber) has the characteristics of high dimensional stability, low shrinkage, easy washing and quick drying, while cotton (cotton) has excellent warmth retention, comfort and breathability. In addition, the performance of vinylon (vinylon fiber) is close to that of cotton. Compared with cotton, it has a lower relative density and better wear resistance and strength. Using vinylon in blended fabrics can save cotton. Polyester-vinylon-cotton blended fabrics organically combine the advantages of the three fibers, and have the excellent properties of polyester, vinylon and cotton. They play an important role in national defense and military clothing.

[0003] When using polyester-cotton blended fabrics to produce modern military camouflage clothing, the fabrics produced using traditional paint printing processes have poor hand feel and air permeability, and the product quality cannot meet the requirements. However, the disperse / reduced dye same-paste printing process can significantly improve the disadvantages of poor hand feel and air permeability of printed fabrics because it does not contain adhesives. The use of reduced dyes can also greatly improve the water resistance and light fastness of cotton fibers. However, when printing on polyester-cotton blended fabrics, since polyester fiber is a hydrophobic fiber and the printing paste belongs to an aqueous phase system or a semi-emulsified system, the ultrafine pigment particles in the paste will diffuse along the capillary movement between the fibers with the water molecules in the aqueous emulsion. This may cause the printing paste to penetrate to the bottom during the printing process, especially the edge of the printing will seep, making the pattern outline unclear, and even the reverse side of the color will be transparent. However, cotton fiber, on the contrary, has good hydrophilicity, resulting in different absorption effects of the two fibers on the dye during the printing process of polyester-cotton fabrics, which ultimately affects the post-printing quality of the printed fabric.

[0004] In the prior art, Chinese patent CN 113882167 A discloses a single-sided anti-penetration printing production process for spunlace non-woven fabrics. This process reduces the moisture content of the fabric by improving the pre-treatment process to control the diffusion and penetration of the color paste, and uses a fine printing roller and a high-viscosity printing slurry to achieve a better printing effect. However, there are many factors in the production process that affect the moisture content of the fabric, and the moisture content of the fabric needs to be strictly controlled. Chinese patent CN115094650 A discloses a short-process digital printing process suitable for polyester and cotton. The surface of the polyester fiber is modified by the pre-treatment liquid provided by padding, so that the hydrophilic and hydrophobic properties of the surface of the polyester fiber are similar, which effectively improves the problems of uneven dyeing and blurred printing, while reducing penetration and increasing the color depth of the pigment. However, this process pre-treats the fabric by padding the pre-treatment liquid, which may affect the subsequent dyeing and thus affect the printing effect.

[0005] Therefore, it is still of great significance to explore a reverse anti-color printing process suitable for polyester-cotton blended camouflage fabrics to reduce the infiltration or penetration of color paste without affecting the dyeing during subsequent printing, and to obtain a printing effect with clear patterns on the front and opaque colors on the back, in order to meet the needs of military clothing. Summary of the invention

[0006] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a printing process for a polyester-cotton blended camouflage fabric with a reverse side that is color-proof. The printed fabric produced by this process has a clear pattern on the front side and a rich color, and the reverse side is not color-proof, which can ensure the stability and quality of the printing effect, and the printed fabric has a good feel and air permeability.

[0007] To achieve the above-mentioned purpose of the invention, the technical solution adopted by the present invention is a printing process for a polyester-cotton blended camouflage fabric with anti-translucent color on the reverse side, characterized in that the production process comprises: (1) Pre-treatment process: a series of pre-treatments are carried out on polyester-cotton blended fabrics to remove impurities on the fabrics, improve fabric properties to meet wearing requirements, and provide qualified semi-finished products for subsequent printing processes.

[0008] (2) Rolling waterproof agent on the reverse side. The method used is to roll the bottom of the glossy printing cylinder of the printing machine. That is, a small amount of waterproof agent is directly printed on the reverse side of the pre-treated fabric with a glossy printing cylinder. The waterproof agent can change the composition of the fiber surface layer, reduce the critical surface tension of the fabric to the point where it cannot be wetted by water, and thus make the reverse side of the fabric water-repellent, preventing the dye from penetrating the reverse side during subsequent printing and finishing processes, thereby achieving an anti-color penetration effect; dropping the fabric, drying and rolling it; (3) Printing process: using a printing machine, the fabric treated with a waterproofing agent is printed with a printing paste to see the pattern effect, drop the fabric, and roll it up; (4) baking and shaping, the printed fabric in step (3) is first placed in a baking machine for baking to promote the combination of disperse dyes and fibers and enhance the stability of dyeing, and then the fabric is heat-set in a shaping machine to stabilize the size and shape of the fabric; (5) Reduction soaping: first, caustic soda and sodium hydrosulfite (sodium dithionite, Na2S2O4) are used to reduce the reduction dye on the surface of the fabric, so that the dye is reduced to the leuco sodium salt to dye the fiber, and then oxidized to the water-insoluble dye to be fixed in the fiber; then the fabric is washed with cold water, hydrogen peroxide, and soaping 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; (6) Finishing process: Finishing polyester-cotton blended fabrics to improve the feel of the fabric, stabilize the size and shape of the fabric, and obtain finished fabrics; The printing process adopts disperse dye and vat dye to print with the same paste.

[0009] 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 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 machine speed is 105~115 m / min, and the cloth width is 154~156 cm; (1.3) Rapid desizing and bleaching: The grey fabric after singeing is subjected to rapid desizing and bleaching treatment to remove the sizing and stains on the fabric and further improve the whiteness. The concentrations of the components in the sizing agent used are: caustic soda 13~15 g / L, hydrogen peroxide 4~6 g / L, and high-concentration refining agent 2~4 g / L; the steaming temperature is 95~105℃, the time is 1~3 min, the speed is 25~35 m / min, and the cloth width is 141~143 cm; then the fabric is washed with high-efficiency water to obtain the whiteness and wool effect that meet the dyeing requirements. First, wash with hot water at 90~95℃ for 1~6 grids, then wash with hot water at 68~72℃ for 7~8 grids, and finally wash with water at 48~52℃ for 9~10 grids.

[0010] Furthermore, in the (2) reverse-side single-sided rolling waterproofing agent process, the concentrations of the components of the waterproofing agent used are: waterproofing agent ZY-8809 0.5-1.5%, thickener 3-4%; and the printing machine speed is 35-45 m / min.

[0011] Furthermore, in the (3) printing process, the speed of the printing machine is 40-50 m / min; the type of dye is selected based on factors such as fabric material, fastness requirements and color characteristics, and the dye that meets the corresponding spectral range is selected based on the reflectance spectrum value of the corresponding color. The printing process prescription includes: Black dye composition: disperse black MSD-P, disperse orange SE-C, disperse ruby ​​SE-GFL, vat black GM, vat dark blue VB, vat scarlet R, black G51, thickener; Brown dye composition: Disperse Blue E-4R 100%, Disperse Orange SE-C, Disperse Ruby SE-GFL, Reducing Olive R, Reducing Brown BR, Reducing Yellow G, Black G51, thickener; Green dye composition: Disperse Blue E-4R 100%, Disperse Gold SE-3R, Disperse Ruby SE-GFL, Vat Olive R, Vat Blue C, Vat Yellow G, Black G51, thickener; Yellow-green dye composition: Disperse Blue E-4R 100%, Disperse Orange SE-C, Disperse Golden Yellow SE-3R, Vat Olive R, Vat Green FFB, Vat Yellow GCN, Black G51, thickener; The composition of the khaki dye is: Disperse Blue E-4R 100%, Disperse Orange SE-C, Disperse Ruby SE-GFL, Vat Olive R, Vat Brown BR, Vat Blue RSN, Black G51, and thickener; 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: B means blue or cyan, D means dark or darker color, F means pure color, G means yellow or green, R means red, and V means purple; 2) Indicates properties and uses: C means chlorine bleaching resistance, E means E-type disperse dye with good levelness, L means excellent light fastness and dye solubility, N means standard dyeing method, standard strength, etc., M means color matching dye, P means printing, S means disperse dye, and SE means medium-temperature disperse dye; 3) Indicates the dye strength: the strength of standard dye is usually defined as 100%.

[0012] Furthermore, in the (4) baking and shaping step, the baking temperature is 155-165°C, the time is 140-160 s, and the machine speed is 30-40 m / min; the shaping temperature is 198-202°C, the machine speed is 25-35 m / min, and the cloth width is 153-155 cm.

[0013] Furthermore, in the reduction soaping step (5), the concentrations of the components in the reducing agent used are: 60-65 g / L caustic soda, 105-115 g / L hydrosulfite; the rolling method is 1 tank 1 rolling, the temperature display is 140-145°C, and the rolling pressure is 2-4 kg; Subsequently, wash 1 to 4 grids with cold water, then wash 5 grids with hydrogen peroxide at a concentration of 1 to 2 g / L, then wash 6 to 9 grids with hot water soap at a temperature of 90 to 95°C, and finally wash the last grid with cold water.

[0014] Furthermore, the (6) post-finishing process includes: (6.1) Soft tentering: the fabric is dipped into the finishing liquid, softener is used to reduce the friction coefficient between fibers to obtain a soft effect, the fabric is dried and then stretched at high temperature by a tentering machine; the finishing liquid formula used is: hydrophilic softener 10~12g / L, acetic acid 1~3 g / L; the temperature is 178~182℃, the speed is 25~35 m / min, and the cloth width is 152~154 cm; (6.2) Preshrinkage: The fabric is finished by mechanical preshrinkage finishing method, which uses physical methods to reduce the shrinkage of the fabric after immersion in water. 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 preshrinkage speed is 30~40 m / min, and the cloth width is 150~152 cm.

[0015] The advantages and beneficial effects of the present invention are: 1. The present invention adds a process of rolling a waterproofing agent on the back side before the printing process. The method adopted is to roll the bottom of the glossy flower cylinder of the printing machine, that is, to directly print a small amount of waterproofing agent on the back side of the pre-treated fabric with a glossy flower cylinder. The waterproofing agent can change the composition of the fiber surface layer, reduce the critical surface tension of the fabric to the point where it cannot be wetted by water, so that the back side of the fabric obtains a water-repellent effect, weakens the penetration of the color paste, and prevents the reverse penetration of the dye during the subsequent printing process, thereby achieving an anti-translucent effect. Rolling the waterproofing agent on the back side of the fabric does not affect the dyeing effect of the printing color paste on the front side of the fabric during subsequent printing, and effectively weakens the penetration of the color paste, thereby obtaining a printing effect with clear front pattern and opaque color on the back side. In the reduction soaping step, since the back side of the fabric is printed with a waterproofing agent, the dye can be effectively prevented from penetrating into the back side of the fabric, the printing effect is maintained, the stability and quality of the printing effect are ensured, and the demand for military clothing is better met.

[0016] 2. The present invention adopts the disperse / reduced dye same slurry printing process, which significantly improves the disadvantages of poor hand feel and air permeability of printed fabrics. The use of reduced dyes can also greatly improve the water-resistant and light-resistant color fastness of cotton fibers. After the printing process, the baking step is used to promote the combination of disperse dyes and fibers, thereby enhancing the stability of dyeing; through the reduction treatment, the reduced dyes are reduced to leuco sodium salts to dye the fibers, and then oxidized to water-insoluble dyes, which greatly reduces the solubility of the printing dyes and allows the dyes to be fully fixed to the fabric fibers; through the soaping step, the floating color on the fiber surface is removed, so that the fiber color is bright and the color fastness is improved.

[0017] 3. The printing process of the present invention realizes the printing of single-sided five-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

[0018] Figure 1 It is a flow chart of the printing process of the reverse-side anti-translucent polyester-cotton blended camouflage fabric of the present invention; Figure 2 This is a real picture of the front printing effect of the polyester-cotton blended camouflage fabric with anti-translucent color on the reverse side in the present invention; Figure 3 This is a real picture of the reverse printing effect of the reverse anti-coloring polyester-cotton blended camouflage fabric of the present invention. DETAILED DESCRIPTION

[0019] 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.

[0020] Example 1 In this embodiment, a printing process for a polyester-cotton blended camouflage fabric with anti-translucent color on the reverse side is described in detail. Figure 1 , the production process includes the following steps: (1) Pre-treatment process, which includes: (1.1) Grey fabric, polyester / cotton blended twill fabric, blending ratio is N60 / V20 / C20, yarn count is 32 / 2×32 / 2, density is 72×49; (1.2) Spread the fabric and sew; (1.3) Singeing: singe the grey fabric, with the singeing machine at a straight burner, a machine speed of 110 m / min, and a cloth width of 155 cm; (1.4) Rapid desizing and bleaching: The grey fabric after singeing treatment is subjected to rapid desizing and bleaching treatment. The concentrations of the components in the slurry used are: caustic soda 14 g / L, hydrogen peroxide 5 g / L, and high-concentration refining agent 3 g / L; the steaming temperature is 100℃, the time is 2 min, the speed is 30 m / min, and the cloth width is 142 cm; then the fabric is washed with high-efficiency water to obtain the whiteness and wool effect that meet the dyeing requirements. First, wash with 92℃ hot water for 1~6 grids, then wash with 70℃ hot water for 7~8 grids, and finally wash with 50℃ water for 9~10 grids; (2) The reverse side is rolled with waterproof agent. The method used is to roll the bottom of the glossy flower cylinder of the printing machine. That is, a small amount of waterproof agent is directly printed on the reverse side of the pre-treated fabric with a glossy flower cylinder. The concentration of each component in the waterproof agent used is: waterproof agent ZY-8809 1%, thickener 3.5%; the printing machine speed is 40 m / min; the cloth is dropped, dried and rolled; (3) Printing process: a printing machine is used to print the fabric under the action of printing paste. The speed of the printing machine is 45 m / min. The printing process prescription includes: Black dye composition: Disperse black MSD-P 2 g / L, Disperse orange SE-C 1 g / L, Disperse ruby ​​SE-GFL 1.5 g / L, Vat black GM 3 g / L, Vat dark blue VB 15 g / L, Vat red R 8.8 g / L, Black G51 6.5 g / L, Thickener 50 g / L; Brown dye composition: Disperse Blue E-4R 100% 5 g / L, Disperse Orange SE-C 3 g / L, Disperse Ruby SE-GFL1.3 g / L, Vat Olive R 12 g / L, Vat Brown BR 24 g / L, Vat Yellow G 5.5 g / L, Black G51 1 g / L, Thickener 50 g / L; Green dye composition: Disperse Blue E-4R 100% 7 g / L, Disperse Gold SE-3R 1.5 g / L, Disperse Ruby SE-GFL 0.5 g / L, Reducing Olive R 6.5 g / L, Reducing Blue C 20 g / L, Reducing Yellow G 22 g / L, Black G51 1 g / L, Thickener 50 g / L; Yellow-green dye composition: Disperse Blue E-4R 100% 1.9 g / L, Disperse Orange SE-C 1.6 g / L, Disperse Gold SE-3R 1.4 g / L, Revat Olive R 25 g / L, Revat Green FFB 1.5 g / L, Revat Yellow GCN 9.2 g / L, Black G51 0.5 g / L, Thickener 50 g / L; The composition of the khaki dye is: Disperse Blue E-4R 100% 1.9 g / L, Disperse Orange SE-C 1.5 g / L, Disperse Ruby SE-GFL 0.4 g / L, Vat Olive R 11 g / L, Vat Brown BR 0.6 g / L, Vat Blue RSN 0.5 g / L, Black G51 0.2 g / L, and thickener 50 g / L.

[0021] (4) Baking and shaping: the fabric is baked in a baking machine at a temperature of 160°C, a time of 150 s, and a speed of 35 m / min. The fabric is heat-shaped in a shaping machine at a temperature of 200°C, a speed of 30 m / min, and a cloth width of 154 cm.

[0022] (5) Reduction soaping and color fixing: first, caustic soda and hydrosulfite are used to reduce the reduction 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 to 4 squares, then with 1.5 g / L hydrogen peroxide for 5 squares, then with 92°C hot water soap for 6 to 9 squares, and finally with cold water.

[0023] (6) Post-finishing process, which includes: (6.1) Softening tentering: dip the fabric into the finishing liquid to obtain a soft effect; dry the fabric and then tenter it at high temperature; the finishing liquid formula used is: hydrophilic softener 11 g / L, acetic acid 2 g / L; the tentering finishing temperature is 180℃, the speed is 30 m / min, and the cloth width is 153 cm; (6.2) Preshrinkage: The fabric is pre-shrinked by mechanical pre-shrinkage finishing method, with the pre-shrinkage speed of 35 m / min and the cloth width of 151 cm to obtain the finished product of polyester-cotton blended camouflage printed fabric with anti-translucent color on the reverse side.

[0024] 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 154 cm; the concentrations of the components in the pulp used for rapid desizing and bleaching treatment are: caustic soda 13 g / L, hydrogen peroxide 4 g / L, high-concentration refining agent 2 g / L, steaming temperature of 95°C, time of 1 min, machine speed of 25 m / min, and cloth width of 141 cm. Then the fabric is efficiently washed with hot water at 90°C for 1 to 6 grids, then with hot water at 68°C for 7 to 8 grids, and finally with water at 48°C for 9 to 10 grids; in the step of rolling the waterproofing agent on the reverse side, the concentrations of the components in the waterproofing agent used are: waterproofing agent ZY-8809 0.5%, thickener 3%, and the speed of the printing machine is 35 m / min; in the printing process, the speed of the printing machine is 40 m / min; in the baking and shaping step, the baking temperature is 155°C, the time is 140s, and the speed is 30 m / min, the setting temperature is 198℃, the speed is 25 m / min, and the cloth width is 153 cm. In the reduction soaping 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 rolling, the temperature display is 140℃, the rolling pressure is 2 kg, then the fabric is 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 washed with cold water at the last grid; in the soft tentering step, the finishing liquid formula used is: hydrophilic softener 10 g / L, acetic acid 1 g / L; the tentering finishing temperature is 178℃, the speed is 25 m / min, and the cloth width is 152 cm; in the pre-shrinking step, the speed is 30 m / min, and the cloth width is 150 cm, and the polyester-cotton blended camouflage printed fabric with reverse anti-transparent color is obtained.

[0025] 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 156 cm; the concentrations of the components in the pulp used for rapid desizing and bleaching treatment are: caustic soda 15 g / L, hydrogen peroxide 6 g / L, high-concentration refining agent 4 g / L, steaming temperature of 105°C, time of 3 min, machine speed of 35 m / min, and cloth width of 143 cm. Then the fabric is efficiently washed with hot water at 95°C for 1 to 6 grids, then with hot water at 72°C for 7 to 8 grids, and finally with water at 52°C for 9 to 10 grids; in the step of rolling the waterproof agent on the reverse side, the concentrations of the components in the waterproof agent used are: waterproof agent ZY-8809 1.5%, thickener 4%, and the speed of the printing machine is 45 m / min; in the printing process, the speed of the printing machine is 50 m / min; in the baking and shaping step, the baking temperature is 165°C and the time is 160 s, machine speed is 40 m / min, setting temperature is 202℃, machine speed is 35 m / min, and cloth width is 155 cm. In the reduction soaping step, the concentrations of the components in the reducing agent are: 65 g / L caustic soda, 115 g / L insurance powder, the rolling method is 1 tank 1 roll, the temperature display is 145°C, 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, then washed with hot water soap at a temperature of 95°C for 6-9 grids, and finally washed with cold water at the last grid; in the soft tentering step, the finishing liquid formula used is: 12 g / L hydrophilic softener, 3 g / L acetic acid; the tentering finishing temperature is 182°C, the vehicle speed is 35 m / min, and the cloth width is 154 cm; in the pre-shrinking step, the vehicle speed is 40 m / min, and the cloth width is 152 cm, so as to obtain a polyester-cotton blended camouflage printed fabric with reverse anti-transparent color.

[0026] The printing effect of the finished product of the polyester-cotton blended camouflage printed fabric with anti-translucent color on the reverse side prepared in the embodiment of the present invention is shown in the actual picture. Figure 2 (front) and Figure 3 (Reverse). Figure 2 It can be seen that the printed fabric of the present invention has clear patterns on the front, rich colors, no color paste bleeding, and good printing effect. Figure 3 It can be seen that the reverse side of the printed fabric of the present invention does not have the color paste penetration phenomenon, and the reverse side is not transparent, thus achieving the effect of preventing color penetration.

[0027] 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 a polyester-cotton blended camouflage fabric with anti-translucent color on the reverse side, characterized in that: The production process comprises the following production steps: (1) Pretreatment process: a series of pretreatments are performed on polyester-cotton blended fabrics; (2) Rolling waterproof agent on the reverse side. The method used is to roll the bottom of the glossy cylinder of the printing machine. That is, use a glossy cylinder to directly print a small amount of waterproof agent on the reverse side of the pre-treated fabric, drop the fabric, dry it and roll it up. (3) Printing: using a printing machine, the fabric treated with a waterproofing agent is printed with a printing paste to see the pattern effect, drop the fabric, and roll it up; (4) baking and shaping, the printed fabric in step (3) is first placed in a baking machine for baking, and then a shaping machine is used to heat-shape the fabric; (5) Reduction soap washing: first, caustic soda and hydrosulfite are used to reduce the reduction dye on the surface of the fabric; then the fabric is washed with cold water, hydrogen peroxide, soap, and cold water respectively; (6) Finishing process: finishing the polyester / cotton blended fabric to obtain the finished fabric; The printing process adopts disperse dye and vat dye to print with the same paste.

2. The printing process of the polyester-cotton blended camouflage fabric with anti-translucent color on the reverse side 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 above grey fabric is subjected to singeing treatment, the singeing machine has a straight burner, a machine speed of 105-115 m / min, and a cloth width of 154-156 cm; (1.3) Rapid desizing and bleaching: The grey fabric after singeing is subjected to rapid desizing and bleaching treatment. The concentrations of the components in the slurry used are: caustic soda 13-15 g / L, hydrogen peroxide 4-6 g / L, and high-concentration refining agent 2-4 g / L; the steaming temperature is 95-105℃, the time is 1-3 min, the speed is 25-35 m / min, and the cloth width is 141-143 cm; then the fabric is efficiently washed with hot water at 90-95℃ for 1-6 grids, then with hot water at 68-72℃ for 7-8 grids, and finally with water at 48-52℃ for 9-10 grids.

3. The printing process of the polyester-cotton blended camouflage fabric with anti-translucent color on the reverse side according to claim 1, characterized in that: The concentrations of the components of the waterproofing agent used in the reverse-side single-sided rolling waterproofing agent process in step (2) are: waterproofing agent ZY-8809 0.5-1.5%, thickener 3-4%; and the printing machine speed is 35-45 m / min.

4. The printing process of the reverse-side anti-translucent polyester-cotton blended camouflage fabric according to claim 1, characterized in that: In the printing process of step (3), the speed of the printing machine is 40-50 m / min; Printing process recipe includes: Black dye composition: disperse black MSD-P, disperse orange SE-C, disperse ruby ​​SE-GFL, vat black GM, vat dark blue VB, vat scarlet R, black G51, thickener; Brown dye composition: Disperse Blue E-4R 100%, Disperse Orange SE-C, Disperse Ruby SE-GFL, Reducing Olive R, Reducing Brown BR, Reducing Yellow G, Black G51, thickener; Green dye composition: Disperse Blue E-4R 100%, Disperse Gold SE-3R, Disperse Ruby SE-GFL, Vat Olive R, Vat Blue C, Vat Yellow G, Black G51, thickener; Yellow-green dye composition: Disperse Blue E-4R 100%, Disperse Orange SE-C, Disperse Gold SE-3R, Vat Olive R, Vat Green FFB, Vat Yellow GCN, Black G51, thickener; The composition of the khaki dye is: Disperse Blue E-4R 100%, Disperse Orange SE-C, Disperse Ruby SE-GFL, Vat Olive R, Vat Brown BR, Vat Blue RSN, Black G51, and thickener.

5. The printing process of the polyester-cotton blended camouflage fabric with anti-translucent color on the reverse side according to claim 1, characterized in that: In the baking and shaping step (4), the baking temperature is 155-165°C, the time is 140-160 s, and the machine speed is 30-40 m / min; the shaping temperature is 198-202°C, the machine speed is 25-35 m / min, and the cloth width is 153-155 cm.

6. The printing process of the polyester-cotton blended camouflage fabric with anti-translucent color on the reverse side according to claim 1, characterized in that: In the step (5) of reducing soap washing, the concentrations of the components in the reducing agent used are: 60-65 g / L caustic soda, 105-115 g / L hydrosulfite; the rolling method is 1 tank 1 rolling, the temperature display is 140-145°C, and the rolling pressure is 2-4 kg; Subsequently, wash 1 to 4 grids with cold water, then wash 5 grids with hydrogen peroxide at a concentration of 1 to 2 g / L, then wash 6 to 9 grids with hot water soap at a temperature of 90 to 95°C, and finally wash the last grid with cold water.

7. The printing process of the polyester / cotton blended camouflage fabric with anti-translucent color on the reverse side according to claim 1, characterized in that: The post-finishing process in step (6) comprises: (6.1) Softening tentering: the fabric is dipped into the finishing liquid to obtain a softening effect, and the fabric is dried and then stretched at high temperature by a tentering machine; the finishing liquid formula used is: hydrophilic softener 10-12 g / L, acetic acid 1-3 g / L; the tentering finishing temperature is 178-182°C, the speed is 25-35 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; (6.2) Pre-shrinkage: The fabric is pre-shrinked by mechanical pre-shrinkage to obtain the finished fabric; the pre-shrinkage speed is 30~40m / min, and the cloth width is 150~152cm.

Images