KR20230000016A - Manufacturing method of antibacterial and flame retardant black dope-dyed recycle polyester yarn and composite yarn, fabric manufactured therefrom - Google Patents

Abstract

An antibacterial and flame-retardant black dope-dyed polyester masterbatch is prepared, and a recycled polyester resin is subjected to crystallization drying and dehumidification drying under constant temperature conditions. The antibacterial and flame-retardant black dope-dyed polyester masterbatch prepared in the above-described manner and the recycled polyester resin are composite spun together to produce a partially drawn yarn (POY) and a drawn yarn (FDY). An antibacterial and flame-retardant black dope-dyed recycled polyester partially drawn yarn produced in the above-described manner is plyed together with the drawn yarn to form air entanglement, thereby producing a black dope-dyed recycled polyester yarn with excellent texture. A composite yarn produced in the above-described manner is an eco-friendly functional flame-retardant composite yarn, which has excellent flame-retardant functionality and excellent breathability and absorbency, has excellent texture and thus can be competitive as a fabric for automobile seat covers.

Description

Manufacturing method of antibacterial and flame retardant black dope-dyed recycle polyester yarn and composite yarn, fabric manufactured therefrom}

At a time when the development of sustainable eco-friendly recycled textile products where humans and the environment coexist is required, the creation of high-functional green market value in the textile industry and the development of new growth engines are required.

In order to apply recycled materials to industrial textile products, it is to develop antibacterial and flame retardant black dope recycled PET composite yarns and apply its use to sheet materials for automobile products to expand its scope of application to industrial textiles.

Millions of tons to tens of millions of tons of PET plastics flow into the sea every year, and it is said that there are more than 1 million pieces of plastic per 1 ㎢ of the sea. Not only the impact on health, etc., but also the social and economic adverse effects due to pollution are concerned.

In Korea, both incineration and landfill are used to treat waste, but it is impossible to build any more incinerators due to opposition from residents, and the world's largest landfill in the metropolitan area is also destined to be discontinued by 2025. In addition, China, which imported and processed about half of the world's recycling waste, declared to the World Trade Organization (WTO) that it would "restrict the import of plastic waste and electronic waste in order to protect the environment and improve health and hygiene." Rather, 'garbage crises' are taking place all over the world.

Despite these problems, until recently, the recycling rate of plastic products was 20-40%, which is relatively low compared to other products. It is difficult to improve the recycling rate.

Recycled plastic produced from waste plastic can be applied to various fields depending on the ingredients and grade, but so far it is applied to plastic injection products, building reinforcement materials, and packaging bands that require low technology, and fiberization that requires a higher level of technology. and product application is incomplete.

In Korea, large and medium-sized companies (Hyosung, Huvis, etc.) are producing recycled PET fibers for clothing using high-purity PET flakes, and non-woven fabrics for civil engineering and automobiles are being produced mainly by small and medium-sized enterprises.

Domestic Patent No. 10-1015383 removes foreign substances contained in bottle waste to secure the purity of polyester granules, and manufactures polyester recycled chips used to produce recycled polyester fibers of good quality by melting and extruding. It explains how. Korean Patent Registration No. 10-1415919 discloses a flame-retardant polyester filament formed of flame-retardant polyester containing a polyester-based resin and a phosphorus-based flame retardant.

When flame-retardant polyester fibers are manufactured by containing phosphorus-based flame retardants in the melt-spinning process of these recycled polyester fibers, safety related to flame retardancy is improved, but due to low moisture content, ventilation is not possible and the touch due to contact is poor, so it is suitable for automobiles. As a seat cover, a problem of poor quality occurs.

Prior Document 1: Domestic Patent Registration No. 10-1015383 (2011.02.17 registration announcement) Prior Document 2: Domestic Patent Registration No. 10-1415919 (2014.07.04 registration announcement)

The present invention has been made to solve the above problems, and is intended to manufacture antibacterial, flame retardant, black dyed recycled polyester yarn by spinning together a recycled polyester resin, an antibacterial agent, and a black dyed polyester resin containing a phosphorus-based flame retardant. .

In addition, antibacterial and flame retardant black dope-dye recycled polyester partially drawn yarn (POY) and antibacterial and flame retardant black dot-dye recycled polyester drawn yarn (FDY) are prepared respectively, and these are manufactured into composite yarns to form antibacterial and flame retardant black dot-dyed composite yarns, which have antibacterial properties. , It is intended to manufacture a black dope-dyed recycled polyester composite yarn for eco-friendly car seat covers with improved moisture absorption and air permeability while imparting flame retardancy.

In order to achieve the above object, the present invention, antibacterial, flame retardant black dope polyester masterbatch manufacturing step; Recycling polyester resin drying step; Spinning step of recycled polyester resin and black dope polyester masterbatch; Provides a method for producing antibacterial and flame retardant black dope recycled polyester yarn consisting of a manufacturing step of black dope recycled polyester partially drawn (POY) yarn.

In addition, antibacterial, flame retardant black dope polyester masterbatch manufacturing step; Recycling polyester resin drying step; Spinning step of recycled polyester resin and black dope polyester masterbatch; It provides an antibacterial, flame retardant black dope recycled polyester yarn manufacturing method consisting of a manufacturing step of black dope recycled polyester drawn yarn (FDY).

The antibacterial, flame retardant black dope polyester masterbatch manufacturing step is 2 to 3 parts by weight of a carbon-based colorant, 8 to 15 parts by weight of a phosphorus-based flame retardant, and 8 to 15 parts by weight of a zeolite antibacterial agent supported by silver (Ag) based on 100 parts by weight of the total masterbatch Part by weight, the balance provides a method for producing an antibacterial, flame retardant black dyed recycled polyester yarn, characterized in that composed of new polyester resin.

In the drying step of the recycled polyester resin, the recycled polyester resin having an IV of 0.70 to 0.75 dl / g and a melting temperature of 250 to 259 ° C. is heated to 80 to 130 ° C. in a dryer and crystallized and dried for 5 to 9 hours. , It provides a method for producing an antibacterial, flame retardant black dope recycled polyester yarn characterized in that the final moisture content is 100 ppm or less by performing dehumidification drying at 120 ~ 130 ℃ for 30 minutes to 3 hours.

In the spinning step of the recycled polyester resin and the black dope polyester masterbatch, the content of the recycled polyester resin and the black dope polyester masterbatch is 15: 1 to 3 in weight ratio, and the melting temperature of the extruder is 275 to 290 ° C. It provides a method for producing an antibacterial, flame retardant black dyed recycled polyester yarn, characterized in that.

In addition, the antibacterial, flame retardant black dope recycled polyester partially drawn yarn (POY) manufacturing step is spinning temperature 270 ~ 290 ℃, winding speed 2,900 ~ 3,200 m / min, antibacterial, flame retardant black dope recycled polyester drawn yarn (FDY) manufacturing The step provides a method for producing an antibacterial, flame retardant black dope recycled polyester yarn, characterized in that the spinning temperature of 270 ~ 290 ℃, winding speed 4,000 ~ 5,000 m / min.

On the other hand, in the manufacturing step of antibacterial and flame retardant black dope recycled polyester composite yarn, the black dope recycled polyester partially drawn yarn is used as an effect yarn and the black doped recycled polyester stretched yarn is combined and stretched as a screening, and the heat treatment temperature is 120 ~ 130 ℃, the air pressure for air entanglement is treated at 1.2 ~ 3.5 kg / cm ² , and the winding speed is an antibacterial, flame retardant black dope recycled polyester composite, characterized in that produced by winding at a speed of 400 ~ 800 m / min It provides a manufacturing method of yarn.

The antibacterial and flame retardant black dope recycled polyester composite yarn thus prepared is manufactured into a fabric through warp knitting and weaving, and is provided as a fabric for automobile seat covers.

It is possible to manufacture an eco-friendly functional flame retardant composite yarn having excellent antibacterial and flame retardant functionality and excellent air permeability and absorbency.

In addition, it has high price competitiveness through the development of functional materials having eco-friendliness, flame retardancy, and antibacterial properties, which are required characteristics of automotive seats, so it can expand its application range to seat covers of various types of vehicles.

1 is a manufacturing process flow chart for the production of antibacterial, flame retardant black dope dyed recycled polyester composite yarn according to the present invention.
Figure 2 is a schematic diagram of a spinning apparatus for the production of antibacterial, flame retardant black dope recycled polyester yarn according to the present invention.
3 is a schematic view of a manufacturing apparatus for forming ply-twisted yarn and air entanglement of antibacterial, flame retardant black dope-coated recycled polyester composite yarn according to the present invention.
Figure 4 is a side view of the antibacterial, flame retardant black dope recycled polyester composite yarn prepared according to the present invention.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, detailed descriptions of related known functions or configurations are omitted in order not to obscure the gist of the present invention.

1 is a manufacturing process flow chart for the production of antibacterial, flame retardant black dope recycled polyester composite yarn according to the present invention, Figure 2 is a schematic diagram of an antibacterial, flame retardant, black dope recycled polyester yarn manufacturing apparatus according to the present invention.

The antibacterial, flame retardant, black dope recycled polyester composite yarn according to the present invention is prepared by spinning together the antibacterial, flame retardant black dope polyester masterbatch and the recycled polyester resin. In the step of spinning them, black dope recycled polyester partially drawn yarn (POY) and black doped recycled polyester drawn yarn (FDY) are prepared, respectively, and heat treated, plied, and air-blown to form antibacterial and flame retardant black doped recycled polyester. manufactures composite yarns.

Referring to Figures 1 and 2, first prepare an antibacterial, flame retardant black dope polyester masterbatch. Black dope polyester masterbatch is prepared by mixing carbon black, a carbon-based colorant, with a new polyester resin at a certain ratio, extruding it into a strand form in water in a melt extrusion device, solidifying it and cutting it into a certain length. A process for preparing such a black dyed polyester masterbatch follows a known method. However, in the present invention, in the process of producing a black dope polyester masterbatch, an antibacterial and flame retardant black dope polyester masterbatch is prepared by mixing a phosphorus-based flame retardant and a silver (Ag)-supported zeolite antibacterial agent in a constant ratio.

At this time, the content of the functional component contained is 2 to 3 parts by weight of a carbon-based colorant, 8 to 15 parts by weight of a phosphorus-based flame retardant, 8 to 15 parts by weight of a zeolite antibacterial agent supported with silver (Ag), based on 100 parts by weight of the total masterbatch, The part is composed of new polyester resin.

The recycled polyester-based resin in the recycled polyester resin drying step is prepared by collecting waste PET according to a known manufacturing process, separating foreign substances, and going through wet grinding, classification, wet grinding, and classification to produce chips for spinning. Purchase and use the one manufactured according to the method. However, in the present invention, the recycled polyester resin has an intrinsic viscosity of 0.70 to 0.75 dl / g and a melting temperature of 250 to 259 ° C., and yarn cutting and quality defects can be prevented by spinning at a lower spinning temperature. , the increase in the spinning pressure over the spinning time can be delayed by strengthening the pack filtration conditions.

The drying step of the recycled polyester-based resin goes through a separate drying system (not shown) for crystallization and dehumidification of spinning chips before being supplied to an extruder through Feeder #1. The drying system is divided into crystallization drying and dehumidifying drying. Crystallization drying is to prevent chips for spinning from being fused to each other to form a bridge, and dehumidifying drying is to remove moisture inside the chips. The lower the final moisture content, the less defects in the spinning process and the improved physical properties of recycled polyester yarn.

The crystallization drying is carried out for a total of 5.0 to 9.0 hours by varying the time for each temperature section in the temperature range of 80 to 130 ° C, and the dehumidifying drying is carried out for 30 minutes to 3 hours at a temperature of 120 to 130 ° C, and the final moisture content is 100 ppm make it below

In the spinning step, the antibacterial, flame retardant black dope polyester masterbatch and the recycled polyester resin are prepared in feeders #1 and #2, respectively, and supplied to the extruder, which is an extrusion device. At this time, the recycled polyester resin supplied from Feeder #1 and the antibacterial, flame retardant black dope polyester masterbatch supplied from Feeder #2 are mixed at a weight ratio of 15: 1 to 3 and supplied to the extruder, an extrusion device. The final antibacterial, flame retardant black dope recycled polyester yarn is adjusted so that the content of the functional component is 1.0 to 2.5% by weight. It is advantageous to increase the content of functional components to improve antibacterial and flame retardant properties, but if the total content of functional components exceeds 2.5% by weight, problems such as trimming and deterioration of physical properties occur. Antibacterial, flame retardant, and carbon-based colorants should be contained at least in weight percent.

At this time, the melting zone of the extruder is divided into #1, #2, #3, and #4 according to the movement path of the polyester resin, and each zone must be controlled at its own temperature. In the present invention, each zone is set at a temperature of 275 ~ 290 ℃ can be set to a temperature lower than the melting temperature of 285 ~ 295 ℃ general polyester spinning. This is because the recycled polyester resin used in the present invention has an intrinsic viscosity of 0.70 to 0.75 dl/g and a melting temperature of 250 to 259 ° C., which is lower than the intrinsic viscosity and melting temperature of the new polyester. It also affects the mechanical properties of dope-dyed recycled polyester yarn.

The antibacterial and flame retardant black dope dyed recycled polyester partially drawn yarn (POY), which is produced by spinning the spinning stock solution melted in the extruder through a spinning beam, is spun at a spinning temperature through an "O" type spinneret. It is manufactured under conditions of 270~290℃, quenching temperature 20~25℃, winding speed 2,900~3,2000m/min.

On the other hand, antibacterial, flame retardant black dope dyed recycled polyester stretched yarn produced by spinning the spinning stock solution melted in the extruder through a spinning beam through an "O" type spinneret at a spinning temperature of 270 to 290 It is manufactured under the conditions of ℃, quenching temperature 20 ~ 25 ℃, winding speed 4,000 ~ 5,000m / min.

According to FIG. 3, in the manufacturing step of the antibacterial and flame retardant black dope recycled polyester composite yarn, the black dope recycled polyester woven yarn (FDY) 10 is loaded on the creel, prepared, and then passed through the Nip Roller 30. It is fed directly to 1 roller (40). Antibacterial, flame retardant black dope recycled polyester partially drawn yarn (POY) 20, which is an effective yarn, is supplied from the creel to the first roller 40 via the Nip Roller 30. A contact heater 50 is provided between the first roller 40 and the second roller 70, and the temperature of the contact heater is controlled using thermal oil. Each supplied black dope recycled polyester yarn (POY, FDY) is heat-treated at a temperature of 120 to 130° C. in the contact heater 50 and supplied to the second roller 70.

Each of the screening 10 and the effect yarn 20 passing through the second roller 70 is plied through air entanglement in the air nozzle 80. In the air bridging step, the air nozzle 80 is placed between the second roller 70 and the linear speed control roller (not shown) to minimize the tension applied to the yarn due to the difference in speed on the yarn. The yarn is formed. (This overfeed according to the second roller and the linear speed control roller is according to the configuration of the prior patent registration number 10-19388838 of the present applicant).

At this time, the air nozzle 80 used for air bridging provides air bridging by supplying air at a pressure within 1.2 to 3.5 kg/m ² , and the diameter of the air outlet of the air nozzle is 1.0 to 1.5 mm. The air nozzle 80 used can be selected from smart air nozzles and tandem air nozzles, and the tandem type has two or more holes through which air is discharged from the nozzle formed on the four sides As a result, the effect of air entanglement can be further improved, and the mixed fineness can be further improved by introducing an inverter to supply air at a uniform pressure.

If the conventional nozzle is a method in which air comes out through a certain hole through the air of the compressor, the smart nozzle can uniformly control the nip density because it can reduce the air deviation discharged from the hole by uniformly controlling the air through an electrical signal. It has the advantage of maximizing the fineness of the blend.

The step of winding the antibacterial and flame retardant black dope-coated recycled polyester composite yarn is a step of winding the recycled polyester composite yarn in which air entanglement is formed at a winding speed of 400 to 800 m/min. The antibacterial, flame retardant black dyed recycled polyester composite yarn thus prepared has a final fineness of 145 to 155 De', strength of 2.5 to 3.0 g/De', and elongation of 15.0 to 25.0%.

The antibacterial, flame retardant black dope recycled polyester composite yarn of the present invention is manufactured as a yarn for manufacturing automobile seat cover fabric through a twisting process of imparting twist within the range of 600 to 2000TM. Fabric for automobile seat cover is applied by applying a conventional one-bath dyeing method in which fabric manufactured by weaving or knitting using the twisted yarn as warp or weft yarn is dyed in a high-temperature and high-pressure rapid dyeing machine at 100 to 130 ° C. for 2 to 5 hours. can be manufactured with

The present invention will be described in detail through the following examples. This embodiment is intended to be specifically described using the most preferred embodiment of the present invention to the extent that those skilled in the art can easily practice the technical idea of the present invention. The scope is not limited to these examples.

< Example 1-1~1-3> Drying step of recycled polyester resin

The recycled polyester resin had an intrinsic viscosity of 0.70 to 0.75 dl/g and a melting temperature of 250 to 259 ° C., and the drying system carried out crystallization drying and dehumidifying drying before being put into the spinning process Examples 1-1 to 1 Drying was performed under conditions of -3. Crystallization drying was performed at a temperature range of 80 to 130 ° C. for a set time, respectively, and dehumidification drying was performed at 130 ° C. for 30 minutes.

[Table 1]

Depending on the treatment time in each temperature range of crystallization and drying, the final moisture content and whether or not fusion between chips appeared different, and when comparing moisture content and bridging, Examples 1-3 achieved the lowest moisture content, bridging did not occur.

< Example 2> Antibacterial, flame retardant Black original arrival Polyester masterbatch manufacturing step

Antibacterial, flame retardant black dope polyester masterbatch manufacturing step is 2 to 3 parts by weight of carbon-based colorant, 8 to 15 parts by weight of phosphorus-based flame retardant, 8 to 15 parts by weight of a zeolite antibacterial agent supported with silver (Ag) based on 100 parts by weight of the total masterbatch Part and the remainder were prepared by mixing a new polyester resin and extruding it into water with an extruder. An antibacterial and flame retardant black dope polyester masterbatch was prepared by cutting the black dope polyester masterbatch in the form of a solidified strand while being extruded to a certain length.

The masterbatch prepared with 20% content of functional component in weight ratio was prepared with 2 parts by weight of carbon black, 10 parts by weight of phosphorus-based flame retardant, 8 parts by weight of zeolite carrying silver (Ag), and 80 parts by weight of new polyester, Functional component in weight ratio A masterbatch prepared with a 30% content was prepared with 3 parts by weight of carbon black, 15 parts by weight of a phosphorus-based flame retardant, 12 parts by weight of zeolite carrying silver (Ag), and 70 parts by weight of new polyester.

The antibacterial and flame retardant black dope polyester masterbatch thus prepared and the contents of recycled polyester were adjusted as shown in the table below to prepare antibacterial and flame retardant black dope recycled polyester, and flame retardancy and antibacterial properties were compared, respectively.

[Table 2]

For flame retardancy, the limiting oxygen index (LOI) was measured in accordance with KS-M ISO 4589-1, and for antimicrobial activity against Staphylococcus aureus and Escherichia coli, antibacterial activity was measured according to KS K 0698 standards. In order to improve the flame retardant function, it is advantageous to add a lot of flame retardant, but considering the spinning workability and the quality of the fiber yarn, the conditions of Example 2-2 were determined to be the most appropriate.

< Example 3> antibacterial, flame retardant, Black original arrival Recycled polyester spinning step

Recycled polyester resin and antibacterial, flame retardant black dope masterbatch (functional ingredient content 30% by weight) are supplied to the extruder at a weight ratio of 15:1 from Feeder #1 and Feeder #2, respectively. Finally, the content of the functional component of the antibacterial and flame retardant black dope recycled polyester yarn was adjusted to be 1.88% by weight.

The melting zone is divided into #1, #2, #3, and #4, and the temperature of each zone is controlled to #1 275℃, #2 280℃, #3 285℃, #4 280℃ while melting spinning was performed.

< Example 4> Antibacterial, flame retardant, Black original arrival recycled polyester Partially stretched yarn ( POY ) manufacturing step

The polymer melted in the composite spinning step of Example 3 was spun through an "O" type spinneret at a spinning temperature of 270 to 275 ° C, a quenching temperature of 20 to 25 ° C, and a winding speed of 2,900 to 3,2000 m/s. Under conditions of min, an antibacterial, flame retardant black dope dyed recycled polyester partially drawn yarn was prepared by adjusting as follows.

[Table 3]

The antibacterial, flame retardant black dope recycled polyester yarn (POY) manufactured under the above conditions has a final fineness in the range of 75±2.5De', and the occurrence of defects such as short yarn breakage, weak yarn, poor appearance, wool, and loop in the production process is compared. When, the process condition according to Example 4-2 was the best.

< Example 5> Antibacterial, flame retardant, Black original arrival Recycled polyester stretched yarn ( FDY ) manufacturing step

The polymer melted in the composite spinning step of Example 3 was spun through an “O” type spinneret at a spinning temperature of 270 to 275 ° C, a quenching temperature of 20 to 25 ° C, and a GR ₁ speed of 500 to 2,500 m/s. min, temperature 90 ~ 100 ℃, GR ₂ speed 4,000 ~ 5,000 m / min, temperature 120 ~ 130 ℃, winding speed 4,000 ~ 5,000 m / min, antibacterial, flame retardant black dope dyed recycled polyester stretched yarn ( FDY) was prepared.

[Table 4]

Antibacterial, flame retardant black dyed recycled polyester drawn yarn (FDY) manufactured under the above conditions has a final fineness in the range of 75±2.5De', and in the production process, defects such as single yarn breakage, weak yarn, poor appearance, wool, and loops are prevented. In comparison, the process conditions according to Example 5-3 were the best.

< Example 6> Antibacterial, flame retardant Black original arrival Manufacture of recycled polyester composite yarn

In the composite yarn manufacturing apparatus of FIG. 3, the antibacterial and flame retardant black doped recycled polyester drawn yarn (FDY) according to Example 4 was examined, and the antibacterial and flame retardant black doped recycled polyester partially drawn yarn (POY) was prepared as an effect yarn, The drawn yarn (10), which is the examiner, is prepared after being loaded on the creel, and then directly supplied to the first roller (40) through the Nip Roller (30), and the effective yarn, antibacterial and flame retardant black dope-dyed recycled polyester partially drawn polyester yarn (POY) (20) ) is heat treated in the contact heater 50 via the first roller 40 via the nip roller 30 in the creel and supplied to the second roller 70. Each yarn is heat-treated at a temperature of 120 to 130° C. in a contact heater and supplied to the second roller 70.

Each yarn whose yarn tension is reduced in the second roller 70 was provided with air entanglement by supplying air within 1.2 to 3.5 kg/m ² from the air nozzle 80, and the air nozzle 80 used is a general An air nozzle (tandem type nozzle) and a smart air nozzle were used. Specific production conditions are shown in the table below. The antibacterial and flame retardant black dope recycled polyester composite yarn produced under these conditions is wound at a speed of 400 to 800 m/min.

[Table 5]

For the exterior evaluation, a score of 1 point to 5 points of good was given by measuring the number of mixed weaves per 1m, and for workability, a score of 1 point to 5 points of good was given by measuring single yarn and thread breakage during the process. When comprehensively considering appearance evaluation, moe, and loop occurrence, it was confirmed that the numerical difference between the general type nozzle and the smart nozzle was not large.

However, as shown in FIG. 4, when comparing the nip density and uniformity by comparing the side of the yarn, it was confirmed that the size of the mixed fiber and the balloon was uniform and the mixed fiber effect was maximized in the smart nozzle that controls the mixed fiber through an electrical signal. .

Antibacterial, flame retardant black dyed recycled polyester composite yarn manufactured under these process conditions has different shrinkage characteristics between the two materials, so after dyeing, the screening on the fabric is FDY and the first yarn is made of POY, so it has excellent bulkiness and a soft touch. .

In addition, since the car seat using a knitted fabric manufactured using such antibacterial and flame retardant black dyed recycled polyester composite yarn is a part that comes into contact with the human body, it can exhibit a soft touch and realize high quality.

10: Judging
20: effect death
30 : Nip roller
40: first roller
50: contact heater
60: non-contact heater
70: second roller
80: air nozzle
90: winding roller

Claims (10)

Antibacterial, flame retardant black dope polyester masterbatch manufacturing step;
Recycling polyester resin drying step;
Spinning step of recycled polyester resin and black dope polyester masterbatch; and
Antibacterial, flame retardant black dope recycled polyester yarn manufacturing method, characterized in that consisting of black dope recycled polyester partially drawn yarn (POY) manufacturing step Antibacterial, flame retardant black dope polyester masterbatch manufacturing step;
Recycling polyester resin drying step;
Spinning step of recycled polyester resin and black dope polyester masterbatch; and
Antibacterial, flame retardant black dope recycled polyester yarn manufacturing method, characterized in that consisting of black dope recycled polyester drawn yarn (FDY) manufacturing step
According to claim 1 or 2,
The antibacterial, flame retardant black dope polyester masterbatch manufacturing step is 2 to 3 parts by weight of a carbon-based colorant, 8 to 15 parts by weight of a phosphorus-based flame retardant, and 8 to 15 parts by weight of a zeolite antibacterial agent supported by silver (Ag) based on 100 parts by weight of the total masterbatch Method for producing an antibacterial, flame retardant black dope recycled polyester yarn, characterized in that the weight part, the balance is composed of a new polyester resin. According to claim 1 or 2,
In the drying step of the recycled polyester resin, the recycled polyester resin having an IV of 0.70 to 0.75 dl / g and a melting temperature of 250 to 259 ° C. is heated to 80 to 130 ° C. in a dryer and crystallized and dried for 5 to 9 hours. , Method for producing an antibacterial, flame retardant black dope recycled polyester yarn, characterized in that the final moisture content is 100ppm or less by performing dehumidification drying at 120 ~ 130 ℃ for 30 minutes to 3 hours. According to claim 1 or 2,
In the spinning step of the recycled polyester resin and the black dope polyester masterbatch, the content of the recycled polyester resin and the black dope polyester masterbatch is 15: 1 to 3 in weight ratio, and the melting temperature of the extruder is 275 to 290 ° C. Method for producing an antibacterial, flame retardant black dyed recycled polyester yarn, characterized in that. According to claim 1,
The antimicrobial, flame retardant black dotted recycled polyester partially drawn polyester yarn (POY) manufacturing step is a method for producing antibacterial, flame retardant black dotted recycled polyester yarn, characterized in that the spinning temperature 270 ~ 290 ℃, winding speed 2,900 ~ 3,200 m / min . According to claim 2,
The antimicrobial, flame retardant black dope recycled polyester drawn yarn (FDY) manufacturing step is an antibacterial, flame retardant black dotted recycled polyester yarn, characterized in that the spinning temperature 270 ~ 290 ℃, winding speed 4,000 ~ 5,000 m / min Manufacturing method. Antibacterial, flame retardant black dyed recycled polyester yarn prepared by the method of claim 1 or claim 2. The antibacterial and flame retardant black dope recycled polyester partially drawn yarn according to the manufacturing method of claim 1 is used as an effect yarn and the antibacterial and flame retardant black doped recycled polyester drawn yarn according to the manufacturing method of claim 2 is multi-stretched and compounded by screening, and the heat treatment temperature is 120 ~ 130 ℃, the air pressure for air bridging is 1.2 ~ 3.5 kg / cm ² , and the winding speed is 400 ~ 800 m / min. Manufacturing method of ester composite yarn. A fabric for a car seat cover using the composite yarn manufactured by the method of claim 9.

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