阅读说明：本技术 一种涤纶织物连续染色方法和染色设备 (Polyester fabric continuous dyeing method and dyeing equipment ) 是由 杨天乔 刘海林 李正雄 于 2020-12-22 设计创作，主要内容包括：本发明公开了一种涤纶织物连续染色方法及染色装置,该方法包括步骤：1)提供浸轧装置,该浸轧装置包括上下设置的上轧辊和下轧辊以及设置在下轧辊下方的浸轧染液槽,下轧辊表面上设置至少一层可拆换的吸水弹性海绵层；2)使下轧辊及其吸水海绵层浸入装在浸轧染液槽中的浸轧染液中,旋转上轧辊和下轧辊,使涤纶织物在上轧辊与下轧辊上吸水弹性海绵层之间通过,得到带染液率为20～40％的浸轧后涤纶织物；3)提供至少一个高温固色装置；和4)进行高温固色处理。本发明方法具有节水节能、染料利用率高、固色时间短、染色牢度好和效率高的优点。(The invention discloses a polyester fabric continuous dyeing method and a dyeing device, and the method comprises the following steps: 1) providing a padding device, wherein the padding device comprises an upper roller and a lower roller which are arranged up and down and a padding dye solution groove which is arranged below the lower roller, and the surface of the lower roller is provided with at least one layer of replaceable water-absorbing elastic sponge layer; 2) immersing a lower roller and a water-absorbing sponge layer thereof into padding dye liquor in a padding dye liquor tank, and rotating an upper roller and the lower roller to enable the polyester fabric to pass between the upper roller and the water-absorbing elastic sponge layer on the lower roller to obtain a padded polyester fabric with a dye liquor rate of 20-40%; 3) providing at least one high-temperature fixing device; and 4) carrying out high-temperature color fixing treatment. The method has the advantages of water and energy conservation, high dye utilization rate, short color fixing time, good dyeing fastness and high efficiency.)

1. A polyester fabric continuous dyeing method comprises the following steps:

1) providing a padding device, wherein the padding device comprises an upper roller and a lower roller which are arranged up and down and a padding dye solution groove which is arranged below the lower roller, and the surface of the lower roller is provided with at least one layer of replaceable water-absorbing elastic sponge layer;

2) immersing a lower roller and a water-absorbing sponge layer thereof into padding dye liquor in a padding dye liquor tank, and rotating an upper roller and the lower roller to enable the polyester fabric to pass between the upper roller and the water-absorbing elastic sponge layer on the lower roller to obtain a padded polyester fabric with a dye liquor rate of 20-40%;

3) providing at least one high-temperature color fixing device, wherein the high-temperature color fixing device comprises two layers of color fixing belts moving in parallel and at least one heating device; and

4) and (3) enabling the padded polyester fabric obtained in the step 2) to pass between two layers of color fixing belts moving in parallel, and performing high-temperature color fixing treatment.

2. The continuous dyeing method of polyester fabric as claimed in claim 1, wherein the upper and lower rolls are rubber rolls, respectively, the upper and lower rolls have a diameter of 100 and 500mm and a hardness of 55-85A.

3. The continuous dyeing method of polyester fabric as claimed in claim 1 or 2, wherein the thickness of the water-absorbent elastic sponge layer is 1-10cm, the hardness is 15-30A, and the porosity is 25-55%.

4. The continuous dyeing method of polyester fabric as claimed in claim 1 or 2, wherein the pressure applied to the polyester fabric by the water-absorbing elastic sponge layer on the surface of the upper and lower rolls is 0.1-0.8 MPa, and the transfer speed of the polyester fabric is 5-80 m/min.

5. The continuous dyeing method of polyester fabric according to claim 1 or 2, wherein the water-absorbent elastic sponge layer comprises polyurethane water-absorbent elastic sponge, polyvinyl alcohol water-absorbent elastic sponge, cellulose fiber water-absorbent elastic sponge, or a combination thereof.

6. The continuous dyeing method of polyester fabric according to claim 1 or 2, characterized in that the two layers of parallelly moving fixed color bands are two layers of parallelly moving polyvinyl fluoride fixed color bands driven by at least two parallel press rollers, and the heating device is a microwave heating device.

7. The continuous dyeing method of polyester fabric according to claim 1 or 2, characterized in that the high temperature fixation is performed at 180 ℃ to 230 ℃ for 1 to 5 min.

8. The continuous dyeing method of polyester fabric according to claim 1 or 2, characterized in that the method further comprises at least one washing treatment to wash the polyester fabric after the high temperature fixation treatment.

9. A polyester fabric continuous dyeing device comprises:

a) the padding device comprises an upper roller and a lower roller which are arranged up and down and a padding dye liquor tank arranged below the lower roller, wherein the surface of the lower roller is provided with at least one layer of replaceable water-absorbing elastic sponge layer, the lower roller and the water-absorbing elastic sponge layer thereof are immersed in padding dye liquor in the padding dye liquor tank, and the padding device enables the polyester fabric to pass through between the upper roller and the water-absorbing elastic sponge layer on the lower roller to obtain the padded polyester fabric with the dye liquor rate of 20-40%;

b) at least one fixing device for fixing the color of the polyester fabric at high temperature comprises two layers of fixing belts moving in parallel and at least one heating device.

10. The continuous dyeing apparatus for polyester fabrics according to claim 9, characterized in that it further comprises at least one cleaning treatment to clean the polyester fabrics after the high temperature fixing treatment.

Technical Field

The invention relates to a polyester fabric continuous dyeing method and dyeing equipment, in particular to an energy-saving and efficient polyester fabric continuous dyeing method and dyeing equipment.

Background

With the further shift of global chemical fiber production to china, the chemical fiber industry in China has been continuously developed in recent years, the total amount of chemical fibers accounts for nearly 70% of the total amount of global chemical fibers, and china has become the largest major country for chemical fiber production and application in the world. The polyester fiber with the largest yield is the polyester fiber, has good wrinkle resistance and shape retention, wrinkle resistance and easy ironing, has higher strength and elastic recovery capability, is firm and durable, and is very popular with consumers.

At present, the dyeing method of the terylene fabric mainly comprises three methods: the carrier method comprises a carrier method, a high-temperature high-pressure method and a hot melting method, wherein the carrier method is less in application because most of carriers required are high in toxicity, poor in degradability and difficult to remove, and the high-temperature high-pressure method and the hot melting dyeing method are commonly used in the industry. The high-temperature high-pressure method is an intermittent damp-heat dyeing method under the closed condition of high temperature (120-140 ℃), can obtain light, medium and light products with even dyeing and good permeability, has high dye utilization rate and wide application range, but has long time consumption, low efficiency, high energy (water, electricity and steam) and large discharge capacity. The hot-melt dyeing method is a continuous dyeing method for fixing color of a fabric at high temperature after the fabric is padded in a dye solution, has high efficiency and is suitable for mass production. However, the liquid carrying rate of the fabric after padding with the dye liquor is about 65-80%, if the fabric is directly dried or subjected to high-temperature color fixation, dye migration (the dye moves along the direction of water molecule evaporation) is easy to occur, and the defect of uneven dyeing occurs, so that the liquid carrying rate is reduced to below 30% by 1 or more pre-drying before the high-temperature color fixation is needed; in addition, in the color fixing stage, the temperature is very high (180-230 ℃), partial dye can migrate and sublimate to the surface of the fabric, or is dissipated to the outside of the fabric, so that equipment and pipelines are polluted, the surface flooding is increased, the utilization rate of the dye and the color fastness of the fabric are reduced, the higher the high temperature resistance of the dye is, the more serious the migration and sublimation are, so that the method needs to select the dye with high temperature and high sublimation resistance fastness, most of the dye can only be used for processing light and medium color woven fabrics, and the brightness and the hand feeling of the fabric are not ideal.

In order to overcome the problems, the production efficiency and the dye utilization rate of the terylene dyeing are improvedAnd reduce energy consumption and environmental pollution, and related workers at home and abroad carry out a great deal of research to improve the dyeing process or search for a novel dyeing technology. For example, in the patent "a method for continuous hot-melt dyeing of polyester" (publication number: CN105672002B), a thickening agent and a prepolymer with strong adhesion to fiber are added into a dyeing solution to prevent dye migration and bleeding during drying and high-temperature fixation, reduce flooding, and improve the utilization rate and fixation rate of the dye. For another example, aerosol jet dyeing is a low liquid feeding dyeing method, which is a method for dyeing by spraying atomized dye liquid on a fabric, and the document, "aerosol dyeing technology discussion" (duaro et al, knitting industry, 12 months 2005, P47-49) adopts aerosol dyeing technology to dye a polyester knitted fabric, so that the bath ratio is low, water and energy are saved, and the dyeing effect is good; however, special equipment is needed for atomizing the dyes, the requirements on the solubility and the stability of the dyes are high, the process needs to be controlled finely, and the problems that an atomizing nozzle is easy to block exist. Furthermore, supercritical CO₂Novel methods such as dyeing, disperse dye microcapsule dyeing, non-aqueous solvent dyeing and the like, or special equipment is needed, so that the cost is high, the operation is difficult, certain dangerousness is caused, and large-scale commercial popularization is difficult; or the microcapsule preparation is more complex, the microcapsule can be agglomerated due to poor stability, and is influenced by slow release rate, and the dyeing time required by deep color is long; or the solvent cost is high, the recovery is troublesome, and the problems of potential safety and health hazards exist, so that the requirements of the current industry cannot be met.

Therefore, how to overcome or avoid the defects of the dyeing method, the dyeing method with high dye utilization rate, low energy consumption, high production efficiency and excellent dyeing effect is developed, is used for dyeing the terylene, is a technical problem which needs to be overcome urgently in the industry, and has very important practical significance.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides an energy-saving and efficient polyester fabric continuous dyeing method, which comprises the following steps:

1) providing a padding device, wherein the padding device comprises an upper roller and a lower roller which are arranged up and down and a padding dye solution groove which is arranged below the lower roller, and the surface of the lower roller is provided with at least one layer of replaceable water-absorbing elastic sponge layer;

2) immersing a lower roller and a water-absorbing sponge layer thereof into padding dye liquor in a padding dye liquor tank, and rotating an upper roller and the lower roller to enable the polyester fabric to pass between the upper roller and the water-absorbing elastic sponge layer on the lower roller to obtain a padded polyester fabric with a dye liquor rate of 20-40%;

3) providing at least one high-temperature color fixing device, wherein the high-temperature color fixing device comprises two layers of color fixing belts moving in parallel and at least one heating device; and

4) and (3) enabling the padded polyester fabric obtained in the step 2) to pass between two layers of color fixing belts moving in parallel, and performing high-temperature color fixing treatment.

Another aspect of the present invention provides a continuous dyeing apparatus for polyester fabric, comprising:

a) the padding device comprises an upper roller and a lower roller which are arranged up and down and a padding dye liquor tank arranged below the lower roller, wherein the surface of the lower roller is provided with at least one layer of replaceable water-absorbing elastic sponge layer, the lower roller and the water-absorbing elastic sponge layer thereof are immersed in padding dye liquor in the padding dye liquor tank, and the padding device enables the polyester fabric to pass through between the upper roller and the water-absorbing elastic sponge layer on the lower roller to obtain the padded polyester fabric with the dye liquor rate of 20-40%;

b) at least one fixing device for fixing the color of the polyester fabric at high temperature comprises two layers of fixing belts moving in parallel and at least one heating device.

Compared with the dyeing method which is disclosed at present, the originality of the invention is shown in the following aspects: 1) the unique padding method of the dye can obviously reduce the liquid carrying rate of the fabric by simple and convenient operation, saves the pre-drying process, saves water, energy and time, can also avoid the migration of dye to the cloth surface along with water during pre-drying, and improves the utilization rate of dyeing, the dyeing uniformity and the color fastness; 2) the adopted polyvinyl fluoride material is a microwave transparent material, cannot be heated by microwave, has stable structure and is difficult for dye to enter; the formed closed space avoids the problems of dye and steam sublimation and dissipation of the fabric under the high-temperature condition, reduces the waste of the dye, is beneficial to the combination of the dye and the fiber, and can obviously improve the utilization rate of the dye and the dyeing fastness; 3) the invention breaks through the limitation that the medium-temperature disperse dye is only suitable for high-temperature high-pressure dip dyeing and color fixing, overcomes the defects of high energy consumption and long time of a high-temperature high-pressure method, and has higher efficiency and wider application range; 4) the dyeing method disclosed by the invention has the advantages of water saving, consumption reduction, short process flow, high efficiency, high dye utilization rate, good color fastness and uniformity and excellent dyeing effect.

Drawings

For a clearer explanation of the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a diagram: the structure schematic diagram of the padding device is shown;

FIG. 2 is a diagram of: the structure schematic diagram of a conventional padding device;

FIG. 3 is a diagram of: the invention discloses a structural schematic diagram of a high-temperature color fixing device.

Detailed Description

Fig. 1 shows a schematic configuration of an embodiment of the padding apparatus of the present invention. The padding device comprises an upper roller 1, a lower roller 5, a padding dye solution groove 6, a detachable water-absorbing elastic sponge layer 4 arranged on the surface of the lower roller 5, an optional auxiliary roller 2 and a pressure device 7.

In a preferred embodiment, the upper and lower rolls 1, 5 are padding rolls commonly used in the art, preferably rubber rolls, more preferably: nitrile rubber; the diameters of the upper roller 1 and the lower roller 5 are 100-500mm, preferably 110-140 mm; the hardness is 60-80A; the width of the roller is 300-2000mm, preferably 350-450 mm.

In a preferred embodiment, the removable absorbent elastic sponge layer has a thickness of 1-10cm, preferably 2-4cm, a hardness of 15-30A and a porosity of 25-55%.

In a more preferred embodiment, the water-absorbent elastic sponge layer comprises a polyurethane water-absorbent elastic sponge, a polyvinyl alcohol water-absorbent elastic sponge, a cellulose fiber water-absorbent elastic sponge, or a combination thereof.

In a preferred embodiment, a padding bath 6 is arranged below the lower roll 5, the padding bath 6 is filled with padding bath, the relative height of the padding bath 6 and the lower roll 5 is adjusted so that the lower roll 5 and the removable water-absorbent elastic sponge layer on the surface thereof are immersed in the padding bath.

In a preferred embodiment, a pressure device 7, which is conventional in padding devices, is used so that the lower roll 5 and the removable absorbent elastic sponge layer on its surface exert a pressure of generally 0.1-0.8 MPa, preferably 0.1-0.2 MPa, on the polyester fabric.

As shown in fig. 1, when the polyester fabric 3 passes through between two upper rollers 1 which rotate relatively and a water-absorbing elastic sponge layer arranged on the surface of a lower roller 5 along an arrow direction 8 under the guidance of an optional auxiliary roller 2, the water-absorbing elastic sponge layer transfers the absorbed padding dye solution to the polyester fabric 3, and the padded polyester fabric with the dye solution rate of 20-40% is obtained. The upper roll 1 and the lower roll 5 rotate in the direction of the arrow 9.

In a preferred embodiment, the transfer speed of the polyester fabric is 5 to 80m/min, more preferably 5 to 20 m/min.

In a preferred embodiment, the padding liquor comprises a dye, a dyeing auxiliary and additives. The dye is preferably a disperse dye. Dyeing auxiliaries and additives are known to the person skilled in the art. The concentration of the dye in the padding liquor is generally between 2 and 300g/L, preferably between 2 and 160 g/L.

As shown in fig. 2, in the conventional padding technique, the polyester fabric is guided from 8 onto the surface of the lower roll 5 through the auxiliary roll, is directly contacted with the padding dye solution contained in the padding dye solution tank 6, passes through the gap between the upper roll 1 and the lower roll 5, bypasses the surface of the upper roll 1, and is guided into the high temperature fixing device through the auxiliary roll 3. The liquid carrying rate of the polyester fabric padded by the method is about 65-80 percent, which is not beneficial to the subsequent high-temperature color fixing treatment.

In one embodiment of the present invention, the padded polyester fabric 3 is then fed into a high temperature fixing device as shown in fig. 3. The high-temperature color fixing device comprises at least one high-temperature color fixing component connected in series. Each high temperature fixing assembly comprises two sets 10 of endless strips of polyvinyl fluoride material stacked together and driven by two parallel rolls 11 (roll gap between the rolls is 0.5-15m, preferably 3.5-5.5m), 16. It is contemplated that the high temperature fixing treatment of the polyester fabric 3 may be performed in a high temperature fixing device when the endless polyvinyl fluoride material tape 10 of the high temperature fixing device is long enough.

In a preferred embodiment of the present invention, each high temperature fixing assembly further comprises at least one semicircular groove auxiliary device 13. The semicircular groove assist device 13 preferably comprises a liner 14 of polyvinyl fluoride material, and the fixation fabric is sandwiched between two strips of polyvinyl fluoride material by adjusting the parallel nip rolls and the semicircular groove assist device to form a continuous nearly closed space.

In one embodiment of the present invention, the padded polyester fabric 3 is guided by at least one auxiliary roller, enters between two layers of polyvinyl fluoride material belts of each high temperature fixing component through the cloth inlet 15, continuously passes through at least one high temperature fixing component for high temperature fixing treatment, and then is conveyed out of the polyester fabric 3 subjected to high temperature fixing treatment through the cloth outlet 12. The high-temperature fixation is usually carried out for 1-5 min at 180-230 ℃.

In a preferred embodiment of the invention, the polyvinyl fluoride material tapes have a thickness of: 0.2-2mm, width: 300-: 2 to 35m, preferably 9 to 13 m.

In a preferred embodiment of the present invention, the heating device in the high temperature fixing device is preferably a microwave heating device (the microwave heating device is, for example, 17 in fig. 3).

In a preferred embodiment of the present invention, the polyester fabric 3 subjected to the high temperature fixing treatment is further subjected to a washing treatment, such as water washing, reduction washing, and water washing, which are generally performed in sequence.

In a preferred embodiment of the present invention, the polyester fabric 3 after the washing treatment is dried.

According to the energy-saving and efficient polyester continuous dyeing method provided by the invention, a special padding mode is adopted, the liquid carrying rate can be reduced to 20-40% from 60-70%, the optimal selection is 25-30%, the water consumption is reduced by more than 50%, a pre-drying process is not needed, the flow is shortened, the energy consumption is reduced, and the dyeing uniformity is improved; the special color fixing mode breaks the limitation that the medium-temperature disperse dye is only suitable for a high-temperature high-pressure dyeing method, obviously shortens the color fixing time and improves the efficiency; the migration of dye in the high-temperature color fixing stage is reduced, the dye is prevented from sublimating and dissipating into the air, the utilization rate of the dye is improved by 8-33%, the color fastness is improved by 0.5-1.5 grade, the dyeing uniformity is good, the equipment and the pipeline cannot be polluted, and the method is obviously superior to the conventional dyeing process.

Examples

In order that those skilled in the art will better understand the technical solution of the present invention, the following detailed description of the present invention is provided in conjunction with the accompanying drawings and the detailed description. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. The examples do not include the techniques or conditions described in the literature in the art or with reference to the product specifications. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.

In the examples, the sources of dyes used in each experimental group are as follows: NaOH, sodium hydrosulfite, polyester fabric and water-absorbing elastic sponge material are all sold in the market; the disperse dyes Yatelong series and Yakeyu CV are all from Yayun group of Shanghai.

The method for measuring the dyeing property of the polyester dyed fabric treated by the method comprises the following steps:

1) the liquid carrying rate:

the quantity of the working solution on the fabric is represented by the change of the quality of the fabric before and after padding the working solution, and the larger the numerical value is, the higher the content of the working solution on the fabric is.

2) Apparent depth K/S value:

and (3) representing the depth degree of the apparent color of the fabric, and adopting a Datacolor color measuring and matching system, a D65 light source and a large aperture to measure, wherein the larger the numerical value is, the darker the color of the fabric is.

3) Color fastness:

color fastness to rubbing: GB/T3920-2008 ' color fastness to rubbing ' test of textile color fastness ' determination, the higher the fastness value is, the better the performance is.

Fastness to soaping: GB/T3921-2008 soaping color fastness resistance of textile color fastness test, the larger the fastness value is, the better the performance is.

4) Dyeing uniformity:

an optional point on the dyed fabric is a standard point, the color difference delta Ei between the optional point and any other 10 points is measured, the standard deviation S is calculated according to the formula (b), and the smaller the S value is, the better the dyeing uniformity is shown.

Example 1 (method of the invention: padding as shown in FIG. 1 → high temperature fixing as shown in FIG. 3)

Taking a fabric: terylene superfine woven fabric (Wujiang trigeminy printing and dyeing Co., Ltd., gram weight: 105g/m²) The dyeing process is carried out according to the following steps:

1) padding a dye solution:

dye working solution: yatelong dark black SWD: 150g/L, Jacobian CV: 15g/L, pH: 4-5;

padding apparatus (as shown in fig. 1):

a polyurethane water-absorbing sponge; pressure of the press roll: 0.2 MPa; cloth speed: 13.5 m/min;

specification of polyurethane water-absorbing sponge: thickness: 2.8cm, hardness: 17A, porosity: 48 percent;

padder specification: roller material: nitrile rubber, roll diameter: 130mm, roll width: the thickness of the steel plate is 420mm,

hardness of the roller: 70A, pressure: 0.2Mpa, roll rotation speed: 17 revolutions per minute;

feeding the fabric into a padding device shown in figure 1 to obtain a padded fabric with a liquid carrying rate of 30%;

2) and (3) high-temperature fixation:

fixing device (as shown in fig. 3):

the polyvinyl fluoride material is connected with the parallel compression rollers; a semicircular groove auxiliary device; microwave heating;

parallel compression roller parameters: roller material: nitrile rubber, roll diameter: 200mm, roll gap: the thickness of the mixture is 5.0m,

width of the roller: 420mm, roll hardness: 70A, parallel press rolls: 6 groups of the Chinese medicinal materials are selected,

roller rotation speed: 11 revolutions per minute;

connecting the polyvinyl fluoride material belt: thickness: 1mm, width: 440mm, length: 12 m;

microwave heating power: 800W;

putting the fabric padded in the step 1) into a high-temperature color fixing device shown in figure 3, and fixing the color for 2min at 220 ℃;

3) cleaning treatment:

and (3) washing the fabric after color fixation (80 ℃ for 10min), reducing and cleaning (NaOH: 3g/L, insurance score: 6g/L, 80 ℃ for 20min), washing (40 ℃ for 10min) and drying.

Comparative example 1-1 (padding → conventional fixation shown in FIG. 1)

Taking a fabric: terylene superfine woven fabric (Wujiang trigeminy printing and dyeing Co., Ltd., gram weight: 105g/m²) The dyeing process is carried out according to the following steps:

1) padding a dye solution:

dye working solution: yatelong dark black SWD: 150g/L, Jacobian CV: 15g/L, pH: 4-5;

padding apparatus (as shown in fig. 1):

a polyurethane water-absorbing sponge; pressure of the press roll: 0.2 MPa; cloth speed: 13.5 m/min;

specification of polyurethane water-absorbing sponge: the same as example 1;

padder specification: the same as example 1;

feeding the fabric into a padding device shown in figure 1 to obtain a padded fabric with a liquid carrying rate of 30%;

2) and (3) high-temperature fixation:

conventional fixation device: no (polyvinyl fluoride material connecting belt + auxiliary device); microwave heating only;

microwave heating power: the same as example 1;

putting the fabric padded in the step 1) into the high-temperature color fixing device, and fixing the color for 2min at 220 ℃;

3) cleaning treatment:

the fabric after fixation was washed as in example 1.

Comparative examples 1-2 (padding shown in FIG. 2 → high temperature fixation shown in FIG. 3)

Taking a fabric: terylene superfine woven fabric (Wujiang trigeminy printing and dyeing Co., Ltd., gram weight: 105g/m²) The dyeing process is carried out according to the following steps:

1) padding a dye solution:

yatelong dark black SWD: 65g/L, Jacobian CV: 6.5g/L, pH: 4-5;

conventional padding apparatus (as shown in fig. 2): no sponge; pressure of the press roll: 0.45 MPa; cloth speed: 13.5 m/min;

padder specification: pressure: 0.45MPa, otherwise as in example 1;

putting the fabric into a padding device shown in figure 2 to obtain a padded fabric with a liquid carrying rate of 69%;

2) and (3) high-temperature fixation:

fixing device (as shown in fig. 3):

the polyvinyl fluoride material is connected with the parallel compression rollers; a semicircular groove auxiliary device; microwave heating;

parallel compression roller parameters: the same as example 1;

connecting the polyvinyl fluoride material belt: the same as example 1;

microwave heating power: the same as example 1;

putting the fabric padded in the step 1) into a high-temperature color fixing device shown in figure 3, and fixing the color for 2min at 220 ℃;

3) cleaning treatment:

the fabric after fixation was washed as in example 1.

Example 2 (method of the invention: padding as shown in FIG. 1 → high temperature fixing as shown in FIG. 3)

Taking a fabric: chunyan (polyester fabrics, Wujiang Tri pack printing & dyeing Co., Ltd., gram weight: 80 g/m)²) The dyeing process is carried out according to the following steps:

1) padding a dye solution:

dye working solution: yatelong Tibetan blue SW-VIP: 85g/L, Jacobian CV: 8.5g/L, pH: 4-5;

padding apparatus (as shown in fig. 1):

polyvinyl alcohol absorbent sponges; pressure of the press roll: 0.1 MPa; cloth speed: 7.5 m/min;

specification of polyvinyl alcohol water-absorbing sponge: thickness: 3.3cm, hardness: 22A, porosity: 31 percent;

padder specification: pressure: 0.1Mpa, roll rotation speed: 9 rpm, otherwise same as example 1; feeding the chiffon fabric into a padding device shown in figure 1 to obtain a padded fabric with a liquid carrying rate of 27%;

2) and (3) high-temperature fixation:

fixing device (as shown in figure 3):

the polyvinyl fluoride material is connected with the parallel compression rollers; a semicircular groove auxiliary device; microwave heating;

parallel compression roller parameters: roll spacing: 4.0m, parallel nip rolls: group 6, roll rotation speed: 6 rpm, otherwise as in example 1;

connecting the polyvinyl fluoride material belt: thickness: 1mm, width: 440mm, length: 10 m;

microwave heating power: 650W;

the fabric padded in the step 1) enters a high-temperature color fixing device shown in figure 3, and is subjected to color fixing for 3min at 180 ℃;

3) cleaning treatment:

and (3) after color fixation, washing the fabric with water (80 ℃ for 10min), reducing and cleaning (NaOH: 2g/L, insurance score: 4g/L, 80 ℃ for 20min), washing with water (40 ℃ for 10min) and drying.

Comparative example 2-1 (conventional method- -high temperature high pressure dyeing)

Taking a fabric: chunyan (polyester fabrics, Wujiang Tri pack printing & dyeing Co., Ltd., gram weight: 80 g/m)²) The dyeing process is carried out according to the following steps:

1) preparing a working solution:

dye working solution: yatelong Tibetan blue SW-VIP: 2.9g/L, Jacobian CV: 0.3g/L, pH: 4-5, bath ratio: 1: 8;

2) high-temperature dyeing:

putting the kasugao fabric into the working solution, heating to 130 ℃ in a high-temperature high-pressure dyeing machine, and treating for 45 min;

3) cleaning treatment:

the fabric after fixation was washed as in example 2.

Comparative example 2-2 (conventional method-Hot melt dyeing method)

Taking a fabric: chunyan (polyester fabrics, Wujiang Tri pack printing & dyeing Co., Ltd., gram weight: 80 g/m)²) The dyeing process is carried out according to the following steps:

1) padding a dye solution:

dye working solution: yatelong Tibetan blue SW-VIP: 35g/L, Jacobian CV: 3.5g/L, pH: 4-5;

conventional padding apparatus (as shown in figure 2): no sponge; pressure of the press roll: 0.3 MPa; cloth speed: 7.5 m/min;

padder specification: pressure: 0.3Mpa, roll rotation speed: 9 rpm, otherwise same as example 1;

feeding the chiffon fabric into a padding device of the dyeing working solution to obtain a padded fabric with a liquid carrying rate of 66%;

2) pre-baked fabric

Putting the padded fabric into a pre-drying machine, evaporating excessive water, and treating at 90 ℃ for 4 min;

3) and (3) high-temperature fixation:

conventional fixation device: no (polyvinyl fluoride material connecting belt + auxiliary device), only microwave heating;

microwave heating power: the same as example 2;

the pre-dried fabric enters the high-temperature color fixing device and is subjected to color fixing for 3min at 180 ℃;

4) cleaning treatment:

the fabric after fixation was washed as in example 2.

Example 3 (method of the invention: padding as shown in FIG. 1 → high temperature fixing as shown in FIG. 3)

Taking a fabric: chunyan (polyester fabrics, Wujiang Tri pack printing & dyeing Co., Ltd., gram weight: 80 g/m)²) The dyeing process is carried out according to the following steps:

1) padding a dye solution:

dye working solution: yatelong red S-G: 40g/L, Jacobian CV: 4g/L, pH: 4-5;

padding apparatus (as shown in figure 1):

wood pulp absorbent sponge; pressure of the press roll: 0.15 MPa; cloth speed: 10 m/min;

specification of wood pulp absorbent sponge: thickness: 2.2cm, hardness: 26A, porosity: 40 percent;

padder specification: pressure: 0.15Mpa, roll rotation speed: 12 rpm, otherwise same as example 1;

feeding the chiffon fabric into a padding device shown in figure 1 to obtain a padded fabric with a liquid carrying rate of 25%;

2) and (3) high-temperature fixation:

fixing device (as shown in fig. 3):

the polyvinyl fluoride material is connected with the parallel compression rollers; a semicircular groove auxiliary device; microwave heating;

parallel compression roller parameters: roll spacing: 4.5m, parallel rolls: group 4, roll rotation speed: 8 rpm, otherwise as in example 1;

connecting the polyvinyl fluoride material belt: thickness: 1mm, width: 440mm, length: 11 m;

microwave heating power: 750W;

the chiffon fabric padded in the step 1) enters a high-temperature color fixing device shown in figure 3, and is subjected to color fixing for 1.5min at the temperature of 195 ℃;

3) cleaning treatment:

and (3) after color fixation, washing the fabric with water (80 ℃ for 10min), reducing and cleaning (NaOH: 2g/L, insurance score: 3g/L, 80 ℃ for 20min), washing with water (40 ℃ for 10min), and drying.

Comparative example 3-1 (conventional method-Hot melt dyeing method)

Taking a fabric: chunyan (polyester fabrics, Wujiang Tri pack printing & dyeing Co., Ltd., gram weight: 80 g/m)²) The dyeing process is carried out according to the following steps:

1) padding a dye solution:

dye working solution: yatelong red S-G: 15g/L, Jacobian CV: 1.5g/L, pH: 4-5;

conventional padding apparatus (as shown in fig. 2): no sponge; pressure of the press roll: 0.3 MPa; cloth speed: 10 m/min;

padder specification: pressure: 0.3Mpa, roll rotation speed: 12 rpm, otherwise same as example 1;

feeding the chiffon fabric into a padding device shown in figure 2 to obtain a padded fabric with a liquor carrying rate of 67%;

2) pre-baked fabric

Putting the padded fabric into a pre-drying machine, evaporating excessive water, and treating at 90 ℃ for 4 min;

3) and (3) high-temperature fixation:

conventional fixation device: no (polyvinyl fluoride material connecting belt + auxiliary device), only microwave heating;

microwave heating power: the same as in example 3;

the pre-dried fabric enters the high-temperature color fixing device and is subjected to color fixing for 1.5min at the temperature of 195 ℃;

4) cleaning treatment:

the fabric after fixation was washed as in example 3.

Comparative example 3-2 (conventional padding → conventional fixation)

Taking a fabric: chunyan (polyester fabrics, Wujiang Tri pack printing & dyeing Co., Ltd., gram weight: 80 g/m)²) The dyeing process is carried out according to the following steps:

1) padding a dye solution:

dye working solution: yatelong red S-G: 15g/L, Jacobian CV: 1.5g/L, pH: 4-5;

conventional padding apparatus (as shown in fig. 2): no sponge; pressure of the press roll: 0.3 MPa; cloth speed: 10 m/min;

padder specification: pressure: 0.3Mpa, roll rotation speed: 12 rpm, otherwise same as example 1;

feeding the chiffon fabric into a padding device of the dyeing working solution to obtain a padded fabric with a liquor carrying rate of 67%;

2) and (3) high-temperature fixation:

conventional fixation device: no (polyvinyl fluoride material connecting belt + auxiliary device), only microwave heating;

microwave heating power: the same as in example 3;

the pre-dried fabric enters the high-temperature color fixing device and is subjected to color fixing for 1.5min at the temperature of 195 ℃;

3) cleaning treatment:

the fabric after fixation was washed as in example 3.

The performance indexes of the processed fabrics of the experimental groups are shown in the attached table 1.

From the test results of the examples and comparative examples in table 1, it can be seen that: compared with the conventional hot-melt dyeing method and the high-temperature and high-pressure dyeing method, the energy-saving and high-efficiency polyester continuous dyeing method provided by the invention has the advantages that the liquid carrying rate is reduced to 25-30% by the special padding mode, the water consumption is reduced by more than 50%, the pre-drying process is not needed, the flow is shortened, the energy consumption is reduced, and the dyeing uniformity is improved; the special color fixing mode breaks through the limitation that the medium-temperature disperse dye is only suitable for a high-temperature high-pressure dyeing method, can be used for continuous dyeing (the method provided by the invention), obviously shortens the color fixing time and improves the efficiency; on the other hand, the migration of the dye in the high-temperature color fixing stage is reduced, the dye is prevented from sublimating and dissipating into the air, equipment and pipelines are not polluted, the dye utilization rate can be improved by 8% -33%, the color fastness is improved by 0.5-1.5 grade, and the dyeing uniformity is good. On the whole, the method has the advantages of water saving, consumption reduction, short process flow, high efficiency, high dye utilization rate, good color fastness and uniformity, and is obviously superior to the conventional dyeing process.