Bidirectional jet dyeing method for low-gram-weight cloth

Abstract

The invention relates to the technical field of fabric dyeing, and discloses a low-gram-weight cloth bidirectional jet dyeing method, which comprises the following steps: respectively setting two ends of a low-gram-weight cloth as an end A and an end B, fixing the end A of a plurality of strands of cloth on a cloth knot, injecting the cloth knot into a nozzle, and after the plurality of strands of cloth completely enter the nozzle, carrying out jet dyeing on the cloth knot; the low-gram-weight cloth dyeing method comprises the following steps of: fixing the end B of a plurality of strands of cloth on a cloth knot, keeping the end B of at least one piece of cloth unfixed to prepare gray cloth, injecting dye, dyeing, opening the cloth knot after dyeing, discharging the cloth, and dehydrating to finish the low-gram-weight cloth dyeing. The dyeing efficiency is remarkably improved, the productivity is remarkably improved, the energy consumption of dyeing auxiliaries, water, electricity and gas is not remarkably increased, and the production cost is remarkably reduced.

Description

Technical Field

[0001] The invention relates to the technical field of fabric dyeing, in particular to a two-way jet dyeing method for low-weight fabric. Background Art

[0002] Low-weight cloth is a kind of cloth with low warp and weft density made of polyester yarn. It has the advantages of good rigidity, high strength, good scratch resistance and poor moisture absorption. It is usually used to make waterproof clothing cloth, luggage cloth, lining cloth, umbrella cover cloth, etc.; traditional fabric intermittent jet and gas-liquid dyeing machines all adopt one-way circulation of fabric. Before dyeing, the rope heads must be connected to form a cloth ring so that the fabric can make periodic circulation motion to complete the fabric dyeing process. In the above method, the fabric feeding needs to be manually found and the head and tail are connected to form a cloth ring. The cloth output also needs to be manually found The cloth ring interface is cut and pulled out and thrown to the cloth drop roller. Therefore, there are problems such as low production efficiency, poor operating environment for personnel, and high labor costs. Therefore, in order to solve the above problems, a bidirectional jet dyeing machine is disclosed in the prior art, such as a bidirectional jet dyeing machine and a bidirectional jet dyeing method disclosed in publication number CN113756025B. This technical solution can drive the dyed fabric to perform bidirectional reciprocating operation and exchange with the dye solution to complete the dyeing process of the fabric. The entire dyeing process does not require the formation of a fabric circulation loop, the search for or the cutting of the loop seams, and has high production efficiency and saves manpower.

[0003] When using a two-way jet dyeing machine, the applicant found that the current method for dyeing low-weight cloth often adopts a single-nozzle dyeing method, that is, one nozzle feeds one strand of cloth for dyeing. After actual operation, the applicant found that the number of strands of cloth fed into the two-way jet dyeing method has a certain relationship with the grammage of the cloth. Adjusting the amount of cloth fed into the nozzle according to different grammage of the cloth can significantly shorten the production time, improve dyeing efficiency, and increase production capacity. Summary of the invention

[0004] In order to overcome the problem of low dyeing efficiency and low yield of the one-nozzle single-strand dyeing method for low grammage cloth in the prior art, the present invention provides a two-way jet dyeing method for low grammage cloth, which adopts a one-nozzle multi-strand dyeing method. This method can use one nozzle to dye multiple cloths, and the dyeing efficiency is significantly improved, the production capacity is significantly improved, and the energy consumption of dyeing auxiliaries, water, electricity and gas will not increase significantly, thereby significantly reducing the production cost.

[0005] The specific technical scheme of the present invention is: A two-way jet dyeing method for low-weight cloth comprises the following steps: the two ends of the low-weight cloth are respectively set as A end and B end, the A ends of multiple strands of cloth are fixed on a cloth knot and the cloth knot is injected into a nozzle, after all the multiple strands of cloth enter the nozzle, the B ends of the multiple strands of cloth are fixed on the cloth knot and the B end of at least one strand of cloth is kept unfixed to form a grey cloth, dye is injected and dyeing is performed, and after dyeing is completed, the cloth knot is opened to remove the cloth and dehydrate it to complete the dyeing of the low-weight cloth.

[0006] The present invention provides a two-way jet dyeing method for low-weight cloth. The method can use one nozzle to dye multiple cloths, significantly improve the dyeing efficiency, significantly increase the production capacity, and can also reduce resources such as dyeing auxiliaries, water, steam and electricity, thereby significantly reducing production costs.

[0007] In actual operation, the present invention has found that when a two-way jet dyeing machine is used for low-weight cloth, multiple cloths can be injected into one nozzle for dyeing, and multiple cloths can be dyed simultaneously in one dye vat, and the dyeing efficiency is significantly improved. In addition, the present application has found that when the gram weight of the low-weight cloth is 100-190g / m, one nozzle and two strands can be used for dyeing, and when the gram weight of the low-weight cloth is less than 100g / m, one nozzle and three strands can be used for dyeing. The use of the above method can reduce 70% of the water, electricity and steam costs, significantly reduce production costs, and the dyeing capacity can be increased to kg / day, and the production capacity is significantly improved.

[0008] In addition, the present application optimizes and adjusts the feeding method of multiple strands of cloth. Using a cloth knot pair to fix one end of the multiple strands of cloth can ensure that the advancement speed of the multiple strands of cloth is consistent, and prevent the problem of cylinder blockage caused by different cloth feeding speeds of the multiple strands of cloth. After the advancement is completed, one end of the cloth without a fixed cloth knot is fixed to the cloth knot and at least one piece of cloth is left unfixed to make a grey cloth. The end that is not connected to the cloth knot can stretch the grey cloth during the dyeing process, which can prevent the difference in length caused by the shrinkage of the grey cloth and ensure the dyeing effect.

[0009] Preferably, the multi-strand cloth has a gram weight of ≤190g.

[0010] Preferably, the number of strands of the multi-strand cloth is ≥2.

[0011] Preferably, the raw materials of the dye include: 2B blue, E-RGFL golden yellow, 3B red, a leveling agent and glacial acetic acid.

[0012] Preferably, the leveling agent is an acidic leveling agent.

[0013] Preferably, the dyeing conditions include: a dyeing bath ratio of 1:4-5.

[0014] Preferably, the dyeing conditions further include: three stages of heating and one stage of cooling.

[0015] Preferably, the three-stage heating comprises the following steps: first heating from 70°C to 115°C at a heating rate of 0.8°C / min, then heating from 115°C to 135°C at a heating rate of 1.5°C / min, and keeping at 135°C for 20 minutes.

[0016] Preferably, the cooling stage comprises the following steps: cooling from 135°C to room temperature at a cooling rate of 1.5°C / min.

[0017] Preferably, after the cloth knot is opened, the A end of the multi-strand cloth is placed on the pull rod of the cloth cart.

[0018] Compared with the prior art, this application has the following technical effects: The present invention provides a two-way jet dyeing method for low-weight cloth. The method can use one nozzle to dye multiple cloths, and the dyeing efficiency is significantly improved, the production capacity is significantly improved, and the energy consumption of dyeing auxiliaries, water, electricity and gas will not increase significantly, thereby significantly reducing the production cost. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the embodiments.

[0020] Embodiment 1: A two-way jet dyeing method for low-weight cloth, wherein the two-way jet machine has one cylinder and four nozzles, comprises the following steps: Feeding cloth: Place two low-weight baggage cloths (weight is 190g / m) in the cloth cart respectively, mark one end of the two low-weight baggage cloths as end A and the other end as end B, tie the A ends of the two cloths into cloth knots, inject the cloth knots into the nozzle of the two-way jet machine, and after all the cloths are injected into the two-way jet machine, fix the B ends of the two low-weight baggage cloths with the cloth knots and keep the B end of one cloth unfixed to make the grey cloth; Grey cloth dyeing: Inject the dye into the two-way jet machine. The raw materials of the dye are 0.43% 2B blue, 0.39% E-RGFL golden yellow, 0.71% 3B red, 1g / L leveling agent and 0.55g / L glacial acetic acid. Dyeing is carried out according to the dyeing bath ratio of 1:4.5. Dyeing is first carried out in three stages of heating and then in one stage of cooling. The three stages of heating are first heated from 70℃ to 115℃ at a heating rate of 0.8℃ / min, and then at 1.5℃ / min. / min heating rate from 115 ℃ to 135 ℃, keep at 135 ℃ for 20 min, cool down from 135 ℃ to room temperature at a cooling rate of 1.5 ℃ / min, open the dyeing vat to open the cloth knot, place the A end of the low-weight luggage cloth on the pull rod of the cloth cart, take out the remaining cloth from the two-way jet machine, hang the B end of the low-weight luggage cloth outside the car after taking it out, and then use the B end as the head to dehydrate to complete the two-way jet dyeing of the low-weight cloth.

[0021] Embodiment 2: A two-way jet dyeing method for low-weight cloth, wherein the two-way jet machine has one cylinder and four nozzles, comprises the following steps: Feeding cloth: Place two low-weight baggage cloths (weight is 170g / m) in the cloth cart respectively, mark one end of the two low-weight baggage cloths as end A and the other end as end B, tie the A ends of the two cloths into cloth knots, inject the cloth knots into the nozzle of the two-way jet machine, and after all the cloths are injected into the two-way jet machine, fix the B ends of the two low-weight baggage cloths with the cloth knots and keep the B end of one cloth unfixed to make the grey cloth; Grey cloth dyeing: Inject the dye into the two-way jet machine. The raw materials of the dye are 0.43% 2B blue, 0.39% E-RGFL golden yellow, 0.71% 3B red, 1g / L leveling agent and 0.55g / L glacial acetic acid. Dyeing is carried out according to the dyeing bath ratio of 1:4.5. Dyeing is first carried out in three stages of heating and then in one stage of cooling. The three stages of heating are first heated from 70℃ to 115℃ at a heating rate of 0.8℃ / min, and then at 1.5℃ / min. / min heating rate from 115 ℃ to 135 ℃, keep at 135 ℃ for 20 min, cool down from 135 ℃ to room temperature at a cooling rate of 1.5 ℃ / min, open the dyeing vat to open the cloth knot, place the A end of the low-weight luggage cloth on the pull rod of the cloth cart, take out the remaining cloth from the two-way jet machine, hang the B end of the low-weight luggage cloth outside the car after taking it out, and then use the B end as the head to dehydrate to complete the two-way jet dyeing of the low-weight cloth.

[0022] Embodiment 3: A two-way jet dyeing method for low-weight cloth, wherein the two-way jet machine has one cylinder and four nozzles, comprises the following steps: Feeding cloth: Place two low-weight baggage cloths (weight is 150g / m) in the cloth cart respectively, mark one end of the two low-weight baggage cloths as end A and the other end as end B, tie the A ends of the two cloths into cloth knots, inject the cloth knots into the nozzle of the two-way jet machine, and after all the cloths are injected into the two-way jet machine, fix the B ends of the two low-weight baggage cloths with the cloth knots and keep the B end of one cloth unfixed to make the grey cloth; Grey cloth dyeing: Inject the dye into the two-way jet machine. The raw materials of the dye are 0.43% 2B blue, 0.39% E-RGFL golden yellow, 0.71% 3B red, 1g / L leveling agent and 0.55g / L glacial acetic acid. Dyeing is carried out according to the dyeing bath ratio of 1:4.5. Dyeing is first carried out in three stages of heating and then in one stage of cooling. The three stages of heating are first heated from 70℃ to 115℃ at a heating rate of 0.8℃ / min, and then at 1.5℃ / min. / min heating rate from 115 ℃ to 135 ℃, keep at 135 ℃ for 20 min, cool down from 135 ℃ to room temperature at a cooling rate of 1.5 ℃ / min, open the dyeing vat to open the cloth knot, place the A end of the low-weight luggage cloth on the pull rod of the cloth cart, take out the remaining cloth from the two-way jet machine, hang the B end of the low-weight luggage cloth outside the car after taking it out, and then use the B end as the head to dehydrate to complete the two-way jet dyeing of the low-weight cloth.

[0023] Embodiment 4: A two-way jet dyeing method for low-weight cloth, wherein the two-way jet machine has one cylinder and four nozzles, comprises the following steps: Feeding cloth: Place three low-weight baggage cloths (weight is 130g / m) in the cloth cart respectively, mark one end of the three low-weight baggage cloths as end A and the other end as end B, tie the A ends of the three cloths into cloth knots, inject the cloth knots into the nozzle of the two-way jet machine, and after all the cloths are injected into the two-way jet machine, fix the B ends of the three low-weight baggage cloths with the cloth knots and keep the B end of one cloth unfixed to make the grey cloth; Grey cloth dyeing: Inject the dye into the two-way jet machine. The raw materials of the dye are 0.43% 2B blue, 0.39% E-RGFL golden yellow, 0.71% 3B red, 1g / L leveling agent and 0.55g / L glacial acetic acid. Dyeing is carried out according to the dyeing bath ratio of 1:4.5. Dyeing is first carried out in three stages of heating and then in one stage of cooling. The three stages of heating are first heated from 70℃ to 115℃ at a heating rate of 0.8℃ / min, and then at 1.5℃ / min. / min heating rate from 115 ℃ to 135 ℃, keep at 135 ℃ for 20 min, cool down from 135 ℃ to room temperature at a cooling rate of 1.5 ℃ / min, open the dyeing vat to open the cloth knot, place the A end of the low-weight luggage cloth on the pull rod of the cloth cart, take out the remaining cloth from the two-way jet machine, hang the B end of the low-weight luggage cloth outside the car after taking it out, and then use the B end as the head to dehydrate to complete the two-way jet dyeing of the low-weight cloth.

[0024] Embodiment 5: A two-way jet dyeing method for low-weight cloth, wherein the two-way jet machine has one cylinder and four nozzles, comprises the following steps: Feeding cloth: Place two low-weight baggage cloths (weight is 180g / m) in the cloth cart respectively, mark one end of the two low-weight baggage cloths as end A and the other end as end B, tie the A ends of the two cloths into cloth knots, inject the cloth knots into the nozzle of the two-way jet machine, and after all the cloths are injected into the two-way jet machine, fix the B ends of the two low-weight baggage cloths with the cloth knots and keep the B end of one cloth unfixed to make the grey cloth; Grey cloth dyeing: Inject the dye into the two-way jet machine. The raw materials of the dye are 0.43% 2B blue, 0.39% E-RGFL golden yellow, 0.71% 3B red, 1g / L leveling agent and 0.55g / L glacial acetic acid. Dyeing is carried out according to the dyeing bath ratio of 1:4.5. Dyeing is first carried out in three stages of heating and then in one stage of cooling. The three stages of heating are first heated from 70℃ to 115℃ at a heating rate of 0.8℃ / min, and then at 1.5℃ / min. / min heating rate from 115 ℃ to 135 ℃, keep at 135 ℃ for 20 min, cool down from 135 ℃ to room temperature at a cooling rate of 1.5 ℃ / min, open the dyeing vat to open the cloth knot, place the A end of the low-weight luggage cloth on the pull rod of the cloth cart, take out the remaining cloth from the two-way jet machine, hang the B end of the low-weight luggage cloth outside the car after taking it out, and then use the B end as the head to dehydrate to complete the two-way jet dyeing of the low-weight cloth.

[0025] Embodiment 6: A two-way jet dyeing method for low-weight cloth, wherein the two-way jet machine has one cylinder and four nozzles, comprises the following steps: Feeding cloth: Place two low-weight baggage cloths (weight is 160g / m) in the cloth cart respectively, mark one end of the two low-weight baggage cloths as end A and the other end as end B, tie the A ends of the two cloths into cloth knots, inject the cloth knots into the nozzle of the two-way jet machine, and after all the cloths are injected into the two-way jet machine, fix the B ends of the two low-weight baggage cloths with the cloth knots and keep the B end of one cloth unfixed to make the grey cloth; Grey cloth dyeing: Inject the dye into the two-way jet machine. The raw materials of the dye are 0.43% 2B blue, 0.39% E-RGFL golden yellow, 0.71% 3B red, 1g / L leveling agent and 0.55g / L glacial acetic acid. Dyeing is carried out according to the dyeing bath ratio of 1:4.5. Dyeing is first carried out in three stages of heating and then in one stage of cooling. The three stages of heating are first heated from 70℃ to 115℃ at a heating rate of 0.8℃ / min, and then at 1.5℃ / min. / min heating rate from 115 ℃ to 135 ℃, keep at 135 ℃ for 20 min, cool down from 135 ℃ to room temperature at a cooling rate of 1.5 ℃ / min, open the dyeing vat to open the cloth knot, place the A end of the low-weight luggage cloth on the pull rod of the cloth cart, take out the remaining cloth from the two-way jet machine, hang the B end of the low-weight luggage cloth outside the car after taking it out, and then use the B end as the head to dehydrate to complete the two-way jet dyeing of the low-weight cloth.

[0026] Embodiment 7: A two-way jet dyeing method for low-weight cloth, wherein the two-way jet machine has one cylinder and four nozzles, comprises the following steps: Feeding cloth: Place two low-weight baggage cloths (weight is 140g / m) in the cloth cart respectively, mark one end of the two low-weight baggage cloths as end A and the other end as end B, tie the A ends of the two cloths into cloth knots, inject the cloth knots into the nozzle of the two-way jet machine, and after all the cloths are injected into the two-way jet machine, fix the B ends of the two low-weight baggage cloths with the cloth knots and keep the B end of one cloth unfixed to make the grey cloth; Grey cloth dyeing: Inject the dye into the two-way jet machine. The raw materials of the dye are 0.43% 2B blue, 0.39% E-RGFL golden yellow, 0.71% 3B red, 1g / L leveling agent and 0.55g / L glacial acetic acid. Dyeing is carried out according to the dyeing bath ratio of 1:4.5. Dyeing is first carried out in three stages of heating and then in one stage of cooling. The three stages of heating are first heated from 70℃ to 115℃ at a heating rate of 0.8℃ / min, and then at 1.5℃ / min. / min heating rate from 115 ℃ to 135 ℃, keep at 135 ℃ for 20 min, cool down from 135 ℃ to room temperature at a cooling rate of 1.5 ℃ / min, open the dyeing vat to open the cloth knot, place the A end of the low-weight luggage cloth on the pull rod of the cloth cart, take out the remaining cloth from the two-way jet machine, hang the B end of the low-weight luggage cloth outside the car after taking it out, and then use the B end as the head to dehydrate to complete the two-way jet dyeing of the low-weight cloth.

[0027] Embodiment 8: A two-way jet dyeing method for low-weight cloth, wherein the two-way jet machine has one cylinder and four nozzles, comprises the following steps: Feeding cloth: Place two low-weight baggage cloths (weight is 120g / m) in the cloth cart respectively, mark one end of the two low-weight baggage cloths as end A and the other end as end B, tie the A ends of the two cloths into cloth knots, inject the cloth knots into the nozzle of the two-way jet machine, and after all the cloths are injected into the two-way jet machine, fix the B ends of the two low-weight baggage cloths with the cloth knots and keep the B end of one cloth unfixed to make the grey cloth; Grey cloth dyeing: Inject the dye into the two-way jet machine. The raw materials of the dye are 0.43% 2B blue, 0.39% E-RGFL golden yellow, 0.71% 3B red, 1g / L leveling agent and 0.55g / L glacial acetic acid. Dyeing is carried out according to the dyeing bath ratio of 1:4.5. Dyeing is first carried out in three stages of heating and then in one stage of cooling. The three stages of heating are first heated from 70℃ to 115℃ at a heating rate of 0.8℃ / min, and then at 1.5℃ / min. / min heating rate from 115 ℃ to 135 ℃, keep at 135 ℃ for 20 min, cool down from 135 ℃ to room temperature at a cooling rate of 1.5 ℃ / min, open the dyeing vat to open the cloth knot, place the A end of the low-weight luggage cloth on the pull rod of the cloth cart, take out the remaining cloth from the two-way jet machine, hang the B end of the low-weight luggage cloth outside the car after taking it out, and then use the B end as the head to dehydrate to complete the two-way jet dyeing of the low-weight cloth.

[0028] Embodiment 9: A two-way jet dyeing method for low-weight cloth, wherein the two-way jet machine has one cylinder and four nozzles, comprises the following steps: Feeding cloth: Place three low-weight baggage cloths (weight is 100g / m) in the cloth cart respectively, mark one end of the three low-weight baggage cloths as end A and the other end as end B, tie the A ends of the three cloths into cloth knots, inject the cloth knots into the nozzle of the two-way jet machine, and after all the cloths are injected into the two-way jet machine, fix the B ends of the three low-weight baggage cloths with the cloth knots and keep the B end of one cloth unfixed to make the grey cloth; Grey cloth dyeing: Inject the dye into the two-way jet machine. The raw materials of the dye are 0.43% 2B blue, 0.39% E-RGFL golden yellow, 0.71% 3B red, 1g / L leveling agent and 0.55g / L glacial acetic acid. Dyeing is carried out according to the dyeing bath ratio of 1:4.5. Dyeing is first carried out in three stages of heating and then in one stage of cooling. The three stages of heating are first heated from 70℃ to 115℃ at a heating rate of 0.8℃ / min, and then at 1.5℃ / min. / min heating rate from 115 ℃ to 135 ℃, keep at 135 ℃ for 20 min, cool down from 135 ℃ to room temperature at a cooling rate of 1.5 ℃ / min, open the dyeing vat to open the cloth knot, place the A end of the low-weight luggage cloth on the pull rod of the cloth cart, take out the remaining cloth from the two-way jet machine, hang the B end of the low-weight luggage cloth outside the car after taking it out, and then use the B end as the head to dehydrate to complete the two-way jet dyeing of the low-weight cloth.

[0029] Embodiment 10: A two-way jet dyeing method for low-weight cloth, wherein the two-way jet machine has one cylinder and four nozzles, comprises the following steps: Feeding cloth: Place three low-weight baggage cloths (weight 90g / m) in the cloth cart respectively, mark one end of two low-weight baggage cloths as end A and the other end as end B, tie the A ends of the two cloths into cloth knots, inject the cloth knots into the nozzle of the two-way jet machine, and after all the cloths are injected into the two-way jet machine, fix the B ends of the two low-weight baggage cloths with the cloth knots and keep the B end of one cloth unfixed to make the grey cloth; Grey cloth dyeing: Inject the dye into the two-way jet machine. The raw materials of the dye are 0.43% 2B blue, 0.39% E-RGFL golden yellow, 0.71% 3B red, 1g / L leveling agent and 0.55g / L glacial acetic acid. Dyeing is carried out according to the dyeing bath ratio of 1:4.5. Dyeing is first carried out in three stages of heating and then in one stage of cooling. The three stages of heating are first heated from 70℃ to 115℃ at a heating rate of 0.8℃ / min, and then at 1.5℃ / min. / min heating rate from 115 ℃ to 135 ℃, keep at 135 ℃ for 20 min, cool down from 135 ℃ to room temperature at a cooling rate of 1.5 ℃ / min, open the dyeing vat to open the cloth knot, place the A end of the low-weight luggage cloth on the pull rod of the cloth cart, take out the remaining cloth from the two-way jet machine, hang the B end of the low-weight luggage cloth outside the car after taking it out, and then use the B end as the head to dehydrate to complete the two-way jet dyeing of the low-weight cloth.

[0030] Comparative Example 1: Compared with Example 1, the comparative example 1 adopts a one-spout single-strand dyeing method, and the two-way jet machine has one cylinder and four spouts, which includes the following steps: A two-way jet dyeing method for low-weight fabrics comprises the following steps: Feeding cloth: Place a low-weight bag cloth (weight 190g / m) in the cloth cart, mark one end of the low-weight bag cloth as end A and the other end as end B, set cloth guides at end A and end B respectively, and inject end A of the cloth into the nozzle of the two-way jet machine to make grey cloth; Grey cloth dyeing: Inject the dye into the two-way jet machine. The raw materials of the dye are 0.43% 2B blue, 0.39% E-RGFL golden yellow, 0.71% 3B red, 1g / L leveling agent and 0.55g / L glacial acetic acid. Dyeing is carried out according to the dyeing bath ratio of 1:4.5. The dyeing is first carried out in three stages of heating and then in one stage of cooling. The three stages of heating are first heated from 70℃ to 115℃ at a heating rate of 0.8℃ / min, and then at 1 .5℃ / min heating rate from 115℃ to 135℃, keep at 135℃ for 20min, cool down from 135℃ to room temperature at a cooling rate of 1.5℃ / min, open the dyeing vat and place the A end of the low-weight luggage cloth on the pull rod of the cloth cart, take out the remaining cloth from the two-way jet machine, hang the B end of the low-weight luggage cloth outside the car after taking it out, and then use the B end as the head for dehydration to complete the two-way jet dyeing of the low-weight cloth.

[0031] Comparative Example 2: Compared with Example 1, in Comparative Example 2, all the B ends are fixed on the knots, and the other conditions are the same as those in Example 1.

[0032] Comparative Example 3: Compared with Example 1, no knot is provided in Comparative Example 2, and the other conditions are the same as those in Example 1.

[0033] Test example 1: The properties of the low-weight fabrics obtained in Examples 1 to 9, Comparative Example 1 and Comparative Example 3 were tested; the test results are shown in Table 2; Table 1 Performance test results As shown in Table 2, the low grammage cloth made in Examples 1 to 10 has a dry friction color fastness of up to Grade 4, a wet friction color fastness of Grade 4, a light fastness of Grade 4-5, a radial tensile breaking strength of >730N, a weft tensile breaking strength of >700N, and a friction resistance of >5000 times. The above results show that the cloth made by dyeing the low grammage cloth according to the present invention has high color fastness, high breaking strength and high friction resistance.

[0034] Comparative Example 1 adopts the traditional single-strand dyeing method. Compared with Examples 1 to 10, there is no significant difference in dry friction color fastness, wet friction color fastness, light fastness, radial tensile breaking strength, dimensional tensile breaking strength and friction resistance times in Comparative Example 1, all of which meet the product requirements.

[0035] In comparative example 2, the B end was completely fixed on the cloth knot, but it was found that the cylinder was blocked and dyeing could not be carried out.

[0036] In Comparative Example 3, no cloth knot was provided. As a result, it was found that when the cloth was taken out again, the cloth head could not be found quickly, and it was difficult to take out the cloth.

[0037] Test example 2: The water, electricity, steam consumption and production capacity of the low-weight fabric jet dyeing method prepared in Examples 1 to 9 and Comparative Example 1 were tested, and the test results are shown in Table 2; Table 2 Water, electricity, and steam consumption and capacity test results Water consumption (tons / day) Gas consumption (tons / day) Electricity consumption (kW / day) Production capacity (kg / day) Example 1 288 25.44 1008 9120 Example 2 288 25.44 1008 8160 Example 3 288 25.44 1008 7200 Example 4 288 25.44 1008 6240 Example 5 288 25.44 1008 8640 Example 6 288 25.44 1008 7680 Example 7 288 25.44 1008 6720 Example 8 288 25.44 1008 5760 Example 9 288 25.44 1008 7200 Example 10 288 25.44 1008 6480 Comparative Example 1 288 25.44 864 5776 As shown in Table 2, the results are the water, electricity, and steam consumption and production capacity of Examples 1 to 10 and Comparative Example 1. Comparative Example 1 tests the maximum production capacity of a single strand. From the above results, it can be seen that the water and steam consumption of Examples 1 to 10 and Comparative Example 1 are the same, with no significant difference. The electricity consumption of Comparative Example 1 is lower than that of Examples 1 to 10. In addition, by calculating the production capacity, it is found that the maximum production capacity of Comparative Example 1 is 5776 kg / day, while the production capacity of Example 1 of the present invention reaches 9120 kg / day, and the production capacity is significantly improved. The above results show that the method provided by the present invention can significantly improve the production capacity of jet dyeing of low-weight cloth, and the water, electricity, and gas consumption will not increase significantly.

[0038] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent transformation made to the above embodiment based on the technical essence of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A two-way jet dyeing method for low-weight fabric, characterized in that: The following steps are involved: The two ends of the low-weight cloth are set as end A and end B respectively. The A ends of the multiple strands of cloth are fixed on a cloth knot and the cloth knot is injected into the nozzle. After all the multiple strands of cloth have entered the nozzle, the B ends of the multiple strands of cloth are fixed on the cloth knot and the B end of at least one strand of cloth is kept unfixed to make the grey cloth. The dye is injected and dyeing is carried out. After the dyeing is completed, the cloth knot is opened to remove the cloth and dehydrate it to complete the dyeing of the low-weight cloth.

2. The dyeing method according to claim 1, characterized in that: The weight of the multi-strand cloth is ≤190 g.

3. The dyeing method according to claim 1 or 2, characterized in that: The number of strands of the multi-strand cloth is ≥2.

4. The dyeing method according to claim 1, characterized in that: The raw materials of the dye include: 2B blue, E-RGFL golden yellow, 3B red, a leveling agent and glacial acetic acid.

5. The dyeing method according to claim 1, characterized in that: The leveling agent is an acidic leveling agent.

6. The dyeing method according to claim 1, characterized in that: The dyeing conditions include: the dyeing bath ratio is 1:4-5.

7. The dyeing method according to claim 1 or 6, characterized in that: The dyeing conditions also include: three stages of heating and one stage of cooling.

8. The dyeing method according to claim 7, characterized in that: The three-stage heating includes the following steps: firstly heating from 70°C to 115°C at a heating rate of 0.8°C / min, then heating from 115°C to 135°C at a heating rate of 1.5°C / min, and keeping at 135°C for 20 min.

9. The dyeing method according to claim 7, characterized in that: The one-stage cooling includes the following steps: cooling from 135°C to room temperature at a cooling rate of 1.5°C / min.

10. The dyeing method according to claim 1, characterized in that: After opening the cloth knot, place the A end of the multi-strand cloth on the pull rod of the cloth cart.

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