阅读说明：本技术 一种涤纶长丝染色方法 (Polyester filament dyeing method ) 是由 陈玉培 廖洪江 于 2020-06-30 设计创作，主要内容包括：本发明属于染整技术领域,公开了一种涤纶长丝染色方法,包括：松式络筒、装纱、注入染液、纱线入缸、高温高压染色、还原清洗、脱水烘干、紧式络筒。本发明提供的涤纶长丝染色方法能够大幅提升染整的质量和效率,降低能耗和人工参与程度。(The invention belongs to the technical field of dyeing and finishing, and discloses a polyester filament dyeing method, which comprises the following steps: loose spooling, yarn loading, dye liquor injection, yarn cylinder feeding, high-temperature high-pressure dyeing, reduction cleaning, dehydration drying and tight spooling. The polyester filament dyeing method provided by the invention can greatly improve the quality and efficiency of dyeing and finishing, and reduce the energy consumption and the degree of manual participation.)

1. A polyester filament dyeing method is characterized by comprising the following steps:

performing loose spooling, namely winding polyester filament yarn precursor on the periphery of a first hollow bobbin after the polyester filament yarn precursor is subjected to bulking process treatment to form a yarn bobbin;

loading yarn, namely sleeving the yarn bobbin on a cage to be dyed;

injecting a dye solution, placing the dye solution which comprises a disperse dye and a leveling agent and has the concentration of 9.5-10.5 g/l in a dye vat, wherein the volume of the dye solution is greater than or equal to 1/3 of the volume of the dye vat;

putting the yarn into a dye vat, arranging the cage frame in the dye vat to immerse the yarn bobbin in the dye solution, and tightly closing a top cover of the dye vat to seal the interior of the dye vat;

dyeing at high temperature and high pressure, sequentially performing first-stage heating, second-stage heating and heat preservation dyeing operation, sequentially heating the temperature in the cylinder from room temperature to 100 ℃, then heating to 130 ℃ and keeping the temperature until dyeing is finished;

reducing and cleaning, discharging the dye solution, then injecting water again, adding sodium hydrosulfite and caustic soda, cleaning for 15 minutes when the temperature is raised to 60 ℃, removing residual dye on the surface of the yarn bobbin, then adding glacial acetic acid to neutralize the alkalinity of the dye solution, discharging the solution, injecting clear water again for cleaning, and then taking out the yarn bobbin;

dewatering and drying, namely putting the yarn bobbin out of the cylinder into a dewatering machine for dewatering treatment to remove moisture in the yarn bobbin, wherein the yarn bobbin is placed flatly to avoid the inconsistency of the moisture content of the yarn;

and (4) tightly winding, namely processing the dehydrated and dried yarn into a yarn bobbin again, and tightly winding the yarn around the periphery of the second hollow bobbin to complete the dyeing and finishing process.

2. The method for dyeing polyester filaments according to claim 1, wherein the yarn bobbin has a mass of 9.95 to 1.05 kg.

3. The method for dyeing polyester filaments according to claim 2, wherein the first hollow bobbin is a hollow paper tube.

4. The method for dyeing polyester filaments according to claim 1, wherein the yarn bobbins are divided into a plurality of layers and fixed on the cage, and gaps between any adjacent yarn bobbins are the same.

5. The method for dyeing seed polyester filament yarn according to claim 1, wherein in the first-stage heating operation, the heating rate is 2 ± 5%/min.

6. The method for dyeing seed polyester filament yarn according to claim 5, wherein in the second-stage heating operation, the heating rate is 1 ± 5%/min.

7. The method for dyeing seed polyester filament yarn according to claim 6, wherein in the heat-preservation dyeing operation, the duration of the moisture-retention period is 30 +/-5% minutes.

8. The method for dyeing polyester filaments according to claim 7, wherein in the high-temperature and high-pressure dyeing operation, dye liquor is driven by a dye vat motor to flow inside and outside the yarn bobbin alternatively;

the dyeing solution is in positive circulation from the outer side to the inner side of the yarn bobbin, or in reverse circulation, and the reverse circulation duration is 1.5-2 times of the positive circulation duration, so that dye molecules on the inner side of the yarn bobbin are ensured to be attached to the surface of the yarn for dyeing.

9. The seed polyester filament dyeing method according to claim 1, further comprising:

and the reclaimed water is formed by chemically treating and filtering the high-temperature sewage discharged from the dye vat in the reduction cleaning and dehydration drying operations through a sewage treatment device and flowing to a sewage tank through the lower layer of the heat energy recovery water tank, and is stored in a reclaimed water storage tower and used in the high-temperature high-pressure dyeing operations.

10. The seed polyester filament dyeing method according to claim 9, further comprising:

and in the operations of reduction cleaning and dehydration drying, the generated steam generates condensed water during transmission in a pipe network and is separated, then the condensed water is introduced into a hydrophobic collection filter tank, and flows to a steam hydrophobic water storage tower for storage and standby after cooling and filtering, and the rest steam is conveyed to the upper layer of a closed heat energy recovery water tank and is condensed into high-temperature tap water for standby.

Technical Field

The invention relates to the technical field of dyeing and finishing, in particular to a polyester filament dyeing method.

Background

Dyeing and finishing refers to a process mainly comprising chemical treatment of textile materials such as fibers, yarns, fabrics and the like, and is an important component in the production process of textiles. The dyeing and finishing of the polyester yarn is divided into three stages of pretreatment, dyeing and post-treatment, wherein the dyeing process needs to be carried out in a high-temperature and high-pressure environment. The quality of dyeing and finishing quality directly influences the quality and use value of finished yarns. The dyeing and finishing process mainly adopts hank yarn dyeing, namely, after the yarn is shaken into hank shape, the hank yarn is hung or stacked in a dyeing machine, and polyester filament yarns are dyed by mechanically pushing a dyeing solution to flow back and forth. However, in the dyeing process, the equipment needs more manual operation and consumes manpower; and the single dyeing quantity of the yarn is small, the time is long, the water and electricity energy consumption is increased, and the dyeing efficiency is not high.

Disclosure of Invention

The invention provides a polyester filament dyeing method, which solves the technical problems of large artificial participation degree, time and labor consumption, small single dyeing amount, low efficiency and high energy consumption of a dyeing and finishing process of hank dyeing in the prior art.

In order to solve the technical problem, the invention provides a polyester filament dyeing method, which comprises the following steps:

performing loose spooling, namely winding polyester filament yarn precursor on the periphery of a first hollow bobbin after the polyester filament yarn precursor is subjected to bulking process treatment to form a yarn bobbin;

loading yarn, namely sleeving the yarn bobbin on a cage to be dyed;

injecting a dye solution, placing the dye solution which comprises a disperse dye and a leveling agent and has the concentration of 9.5-10.5 g/l in a dye vat, wherein the volume of the dye solution is greater than or equal to 1/3 of the volume of the dye vat;

putting the yarn into a dye vat, arranging the cage frame in the dye vat to immerse the yarn bobbin in the dye solution, and tightly closing a top cover of the dye vat to seal the interior of the dye vat;

dyeing at high temperature and high pressure, sequentially performing first-stage heating, second-stage heating and heat preservation dyeing operation, sequentially heating the temperature in the cylinder from room temperature to 100 ℃, then heating to 130 ℃ and keeping the temperature until dyeing is finished;

reducing and cleaning, discharging the dye solution, then injecting water again, adding sodium hydrosulfite and caustic soda, cleaning for 15 minutes when the temperature is raised to 60 ℃, removing residual dye on the surface of the yarn bobbin, then adding glacial acetic acid to neutralize the alkalinity of the dye solution, discharging the solution, injecting clear water again for cleaning, and then taking out the yarn bobbin;

dewatering and drying, namely putting the yarn bobbin out of the cylinder into a dewatering machine for dewatering treatment to remove moisture in the yarn bobbin, wherein the yarn bobbin is placed flatly to avoid the inconsistency of the moisture content of the yarn;

and (4) tightly winding, namely processing the dehydrated and dried yarn into a yarn bobbin again, and tightly winding the yarn around the periphery of the second hollow bobbin to complete the dyeing and finishing process.

Furthermore, the weight of the yarn bobbin is 9.95-1.05 kg.

Further, the first hollow bobbin is a hollow paper tube.

Furthermore, the yarn bobbins are divided into a plurality of layers and fixed on the cage, and gaps between any adjacent yarn bobbins are the same.

Further, in the first-stage temperature raising operation, the temperature raising rate is 2 ± 5%/min.

Further, in the second-stage temperature raising operation, the temperature raising rate is 1 ± 5%/min.

Further, in the heat preservation and dyeing operation, the duration of the moisture preservation phase is 30 minutes.

Further, in the high-temperature and high-pressure dyeing operation, dye liquor is driven by a dye vat motor to alternately flow inside and outside the yarn bobbin;

the dyeing solution is in positive circulation from the outer side to the inner side of the yarn bobbin, or in reverse circulation, and the reverse circulation duration is 1.5-2 times of the positive circulation duration, so that dye molecules on the inner side of the yarn bobbin are ensured to be attached to the surface of the yarn for dyeing.

Further, the polyester filament dyeing method further comprises the following steps:

and the reclaimed water is formed by chemically treating and filtering the high-temperature sewage discharged from the dye vat in the reduction cleaning and dehydration drying operations through a sewage treatment device and flowing to a sewage tank through the lower layer of the heat energy recovery water tank, and is stored in a reclaimed water storage tower and used in the high-temperature high-pressure dyeing operations.

Further, the polyester filament dyeing method further comprises the following steps:

and in the operations of reduction cleaning and dehydration drying, the generated steam generates condensed water during transmission in a pipe network and is separated, then the condensed water is introduced into a hydrophobic collection filter tank, and flows to a steam hydrophobic water storage tower for storage and standby after cooling and filtering, and the rest steam is conveyed to the upper layer of a closed heat energy recovery water tank and is condensed into high-temperature tap water for standby.

One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

according to the polyester filament dyeing method provided by the embodiment of the application, the volume of occupied space is reduced by forming the yarn bobbin, so that the single dyeing amount can be increased to the maximum extent in a limited space; meanwhile, the yarn bobbin is set to be a loose bobbin, and high-quality dyeing is realized by combining the technological parameters and the operation steps of high-temperature and high-pressure dyeing; more importantly, the operation of manual participation is reduced to that of only the upper cage, manual participation is needed, and other steps can be completed through mechanical assistance, so that the operation efficiency is improved. It is worth to be noted that the operation efficiency can be improved to the maximum extent and the energy consumption can be reduced by increasing the number of single dyeing and optimizing the parameters.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

FIG. 1 is a flow chart of a polyester filament dyeing method provided by an embodiment of the invention;

FIG. 2 is a schematic view of a wound state of a bobbin according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a cage arrangement for a yarn bobbin provided by an embodiment of the invention;

FIG. 4 is a schematic diagram of temperature control during a high-temperature high-pressure dyeing stage according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a thermal energy recovery system according to an embodiment of the present invention.

Detailed Description

The embodiment of the application provides a polyester filament dyeing method, and the technical problems that in the prior art, the dyeing and finishing process for skein dyeing is large in artificial participation degree, time-consuming and labor-consuming, small in single dyeing amount, low in efficiency and high in energy consumption are solved.

In order to better understand the technical solutions, the technical solutions will be described in detail below with reference to the drawings and the specific embodiments of the specification, and it should be understood that the embodiments and specific features of the embodiments of the present invention are detailed descriptions of the technical solutions of the present application, and are not limitations of the technical solutions of the present application, and the technical features of the embodiments and examples of the present application may be combined with each other without conflict.

Referring to fig. 1, a method for dyeing polyester filaments includes:

loose spooling, namely performing fluffing process treatment on polyester filament yarn precursor, and winding the polyester filament yarn precursor around the periphery of a first hollow bobbin in a fluffy and uniform state to form a yarn bobbin, so that a dye solution can penetrate into the inner side of the yarn bobbin more easily in the dyeing process, and the generation of inner and outer layer color difference is avoided; generally, the bulk can be controlled to be 4-5 degrees.

Loading yarn, namely sleeving the yarn bobbin on a cage to be dyed;

injecting a dye solution, wherein the components comprise a disperse dye and a leveling agent, and the dye solution with the concentration of 10g/l is placed in a dye vat in the embodiment, wherein the volume of the dye solution is 1/3 of the volume of the dye vat; of course, in actual production, the concentration of the dye liquor can be controlled according to the concentration of 9.5-10.5 g/l, and the volume of the dye liquor can be controlled between 1/3-1/2 of the volume of the dye vat.

Putting the yarn into a dye vat, arranging the cage frame in the dye vat to immerse the yarn bobbin in the dye solution, and tightly closing a top cover of the dye vat to seal the interior of the dye vat;

dyeing at high temperature and high pressure, sequentially performing first-stage heating, second-stage heating and heat preservation dyeing operation, rapidly heating the temperature in the cylinder from room temperature to 100 ℃, heating to 130 ℃ in the second stage, and keeping the temperature until dyeing is finished;

reducing and cleaning, draining the dye solution, then injecting water again, adding sodium hydrosulfite and caustic soda, cleaning for 15 minutes at the temperature of 60 ℃ to remove residual dye on the surface of the yarn bobbin, then adding glacial acetic acid to neutralize the alkalinity of the dye solution, draining the solution, injecting clear water again for cleaning, and then taking out the yarn bobbin;

dewatering and drying, namely putting the yarn bobbin out of the cylinder into a dewatering machine for dewatering treatment to remove moisture in the yarn bobbin, wherein the time can be generally set to 10 minutes; the yarn bobbins are placed flatly to avoid the inconsistency of the moisture content of the yarns;

tightly winding, namely processing the dehydrated and dried yarn into a yarn bobbin again and tightly winding the yarn around the periphery of a second hollow bobbin to finish the dyeing and finishing process; in this embodiment, the second hollow bobbin is a hollow rubber tube.

Referring to FIG. 2, the yarn bobbin comprises a first hollow bobbin A1-1 and a yarn A1-2 wound thereon; generally, the yarn package has a mass of 1 kg.

In this embodiment, the first hollow bobbin a1-1 is a hollow paper tube.

Referring to fig. 3, the yarn bobbins are divided into a plurality of layers and fixed on the cage, and gaps between any adjacent yarn bobbins are the same; specifically, the cage A2-1 is vertically distributed with a plurality of layers, each layer is provided with a tray A2-1a, and a plurality of yarn columns A2-1b are distributed on the tray A2-1 a. When yarn is loaded, the yarn bobbin A2-2 is sleeved into the yarn column A2-1b and needs to be uniformly fixed, so that water flow can uniformly pass through gaps of the yarn bobbin in the dyeing process, and uneven dyeing of products in the same batch is avoided.

Referring to FIG. 4, it is worth emphasizing that in the first-stage temperature raising operation, the temperature raising rate is 2. + -. 5%/min. In the second-stage heating operation, the heating speed is 1 +/-5%/min. In this embodiment, the first-stage heating is set as a fast-heating stage at a speed of 2 ℃/min, and the second-stage heating is set as a slow-heating stage at a speed of 1 ℃/min. In the heat preservation and dyeing operation, the duration of the moisturizing stage is 30 minutes. In the high-temperature high-pressure dyeing operation, dye liquor is driven by a dye vat motor to alternately flow inside and outside the yarn bobbin; the dyeing liquid is in positive circulation from the outer side to the inner side of the yarn bobbin, or in reverse circulation, and the reverse circulation duration is 1.5-2 times of the positive circulation duration, so that the dye molecules on the inner side of the yarn bobbin have sufficient time to be attached to the surface of the yarn for dyeing.

Furthermore, in order to save water and steam to the maximum extent in the course of working, improve economic benefits, this scheme still provides a heat recovery system.

Referring to fig. 1 and 5, a heat energy recovery system D1, one of the functions is to process high temperature sewage into reclaimed water D2 and store it for recycling. High-temperature sewage discharged from the dye vat flows to a sewage pool through the lower layer of the heat energy recovery water tank, and is chemically treated and filtered by sewage treatment equipment to form reclaimed water which is stored in a reclaimed water storage tower.

Another function of the thermal energy recovery system D1 is to collect steam condensate, steam trap D3. The steam can generate condensed water when being transmitted in the pipe network, the condensed water flows along with the transmission of the steam, the water-steam mixture is divided by a water-steam separator, wherein the condensed water flows into a hydrophobic collection filtering tank, and flows to a steam hydrophobic water storage tower for storage and standby after being cooled and filtered; and the steam is conveyed to the upper layer of the closed heat energy recovery water tank and condensed into high-temperature tap water for later use.

One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

according to the polyester filament dyeing method provided by the embodiment of the application, the volume of occupied space is reduced by forming the yarn bobbin, so that the single dyeing amount can be increased to the maximum extent in a limited space; meanwhile, the yarn bobbin is set to be a loose bobbin, and high-quality dyeing is realized by combining the technological parameters and the operation steps of high-temperature and high-pressure dyeing; more importantly, the operation of manual participation is reduced to that of only the upper cage, manual participation is needed, and other steps can be completed through mechanical assistance, so that the operation efficiency is improved. It is worth to be noted that the operation efficiency can be improved to the maximum extent and the energy consumption can be reduced by increasing the number of single dyeing and optimizing the parameters. The heat energy recovery system provides a solution for recycling water and steam resources, saves energy loss in the processing process, reduces the dyeing cost, is favorable for creating price advantage and improves the market competitiveness of products.

Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.