KR20210147796A - Method for manufacturing polyester composite yarn having excellent heat-blocking and melange effect using recycling material - Google Patents

Abstract

The present invention relates to a method for manufacturing polyester composite yarn for blinds using a recycling material, having an excellent heat blocking performance and mélange expression. The method for manufacturing polyester composite yarn for blinds according to the present invention comprises: a step of crushing a waste polyester product into flakes; a step of obtaining a polyester resin by drying the crushed waste polyester flakes; a step of mixing 1.5-3 wt% of an antimony tin oxide with 97-98.5 wt% of the polyester resin; a step of mixing 0.1-1 wt% of the antimony tin oxide with 99-99.9 wt% of a cation-containing polyester resin; a step of adding the polyester resin to which the antimony tin oxide is added and the cation-containing polyester resin to a heated spinneret heated to 290-310℃, and mixing and spinning polyester yarn and cation-containing polyester yarn; a step of manufacturing mixed fiber yarn by cooling and combusting the mixed spinning polyester yarn and the cation-containing polyester yarn; and a step of plaiting the yarn by air-agitating the mixed fiber yarn.

Description

Method for manufacturing polyester composite yarn having excellent heat-blocking and melange effect using recycling material

The present invention relates to a method of manufacturing a polyester composite yarn using a recycled material, and more particularly, by using a recycled material to composite spinning a polyester-based heterogeneous resin having a difference in dyeability using a recycled material, while exhibiting the melange effect, heat It relates to a method for producing a polyester composite yarn having excellent barrier properties.

Blinds are installed on windows or doorways of buildings and are used for the purpose of blocking light, blocking external gaze, and soundproofing. It is used as an important element of interior decoration.

Blinds using melange fabrics having a bicolor effect are preferred in order to improve the interior decoration beauty, and the melange effect can give the blind a deep color to create a luxurious feeling.

Such a melange effect is a composite spinning method, a method of spinning short fibers of different colors by adding a dye to a yarn, a method of processing different types of filaments and processed yarns to compound them, and a method of interweaving different materials in weaving to make a composite fabric It is implemented in such a way as to

On the other hand, the window where the blinds are installed is a passage through which thermal energy moves by connecting the outdoors and the indoors. Conversely, it is necessary to block the heat loss to the outside.

For this purpose, in Korean Patent Laid-Open Publication No. 10-2008-0094307, a film that is attached to a window to block heat has been developed and used. However, such a film has to be separately attached to the window and is lifted or peeled off from the interface attached to exposure to sunlight for a long time, so there is a problem in that the thermal barrier efficiency is lowered when used for a long time.

In addition, according to the recent trend in which multi-functional products are preferred, blinds also need to implement heat blocking performance in consideration of the installation environment such as windows in addition to general functions such as shading, shading, and soundproofing.

Korean Patent Laid-Open Publication No. 10-2008-0094307 (Title of the invention: heat-blocking film and method of manufacturing heat-blocking film)

Accordingly, the present invention has been devised to solve the problems of the prior art, and it is to provide a method for manufacturing a polyester composite yarn for blinds having excellent heat blocking performance while visually displaying a beautiful melange effect using recycled materials. There is this.

In order to solve the above problems, the present invention comprises the steps of crushing the waste polyester product into flakes, drying the crushed waste polyester flakes to obtain a polyester resin, 97-98.5 wt% of polyester Mixing 1.5 to 3% by weight of antimony tin oxide to the resin, mixing 0.1 to 1% by weight of antimony tin oxide to 99 to 99.9% by weight of cationic dyed polyester resin, antimony tin oxide added polyester Putting the resin and cationic dyed polyester resin into a heated spinneret heated to 290 ~ 310°C, mixing and spinning polyester yarn and cation dyed polyester yarn, cooling the mixed spinning polyester yarn and cationic dyed polyester yarn It provides a method for producing a polyester composite yarn for blinds, comprising the steps of producing a mixed yarn by twisting, and braiding the mixed yarn by air entangling.

In the present invention, the waste polyester product is dried to a residual moisture content of 0.05% or less by crushing flakes having a size of 1 to 5 mm.

In addition, in the present invention, the fineness of the polyester yarn is 70 to 150 denier, and the cationic dyed polyester yarn is different from each other by 30 to 50 denier.

In addition, in the present invention, the strength of the polyester composite yarn is 4.3 g/d, and the elongation is 35%.

According to the present invention, it is possible to contribute to environmental protection by recycling polyester products thrown away as waste and using biodegradable materials, and excellent melange by mixing and spinning the obtained polyester resin and cationic dyed polyester yarn having different dyeability. In addition to the effect, the added antimony tin oxide has excellent heat blocking performance, and when weaving as blinds, it is possible to not only create a luxurious interior space, but also effectively block the heat flowing in from the outside and the heat flowing out of the room.

1 is a flowchart of a method for manufacturing a polyester composite yarn according to the present invention.
2 is a process diagram of manufacturing a polyester composite yarn according to the present invention.
3 is a cross-sectional view of the polyester composite yarn prepared according to the present invention.
4 is a photograph of a blind fabric woven with a polyester composite yarn according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

This embodiment is provided to more completely explain the present invention to those with average knowledge in the art, and in principle, in explaining the embodiment, the related art function or known configuration is already in the art. If it is determined that the technical features of the present invention may be unnecessarily obscured as it is obvious to those skilled in the art, the detailed description thereof will be omitted.

1 is a flowchart of a method for manufacturing a polyester composite yarn according to the present invention, and FIG. 2 is a process diagram thereof.

As shown in Figure 1, the present invention is a step of crushing the waste polyester product into flakes (S110), drying the crushed waste polyester flakes to obtain a polyester resin (S120), the obtained A step of mixing antimony tin oxide to each of the polyester resin and cationic dyed polyester (CDP) resin (S100), mixing the polyester resin and cationic dyed polyester resin in which the antimony tin oxide is mixed into a spinneret and spinning the mixture (S200) and, by twisting the mixed spun polyester yarn and cationic dyed polyester yarn to prepare a mixed yarn (S300), and a step (S400) of braiding the mixed yarn.

First, using a grinder, food containers such as discarded polyester plastic bottles are crushed into small flakes of 1 to 5 mm so that they can be easily dried in the drying step to be described later (S100). As such, the present invention can prevent environmental pollution by recycling polyester products thrown away as waste. Here, moisture may remain in the crushed polyester resin, and if the viscosity is lowered by the remaining moisture, the extrusion moldability deteriorates in the subsequent spinning step, so the drying step is performed subsequently.

Next, the polyester resin crushed into a small size of 1 to 5 mm is put into a dryer equipped with a heater and dried (S200). Here, the inside of the dryer is formed in a vacuum state so that moisture does not flow into the dryer, and then an inert gas such as nitrogen gas or argon gas is injected for quick drying so that the heat from the heater is diffused by the gas stream. It is preferable to let At this time, it is preferable that the temperature of the dryer is set to 50° C. to 150° C. and the moisture content remaining in the polyester resin is 0.05 wt % or less. If the dryer temperature is less than 50 ℃, there is a problem that it takes a long time to reach the target residual moisture content, and if the dryer temperature exceeds 150 ℃, the flakes are melted and entangled with each other, there is a problem in that drying is not smooth.

Next, antimony-doped Tin Oxide (ATO) is mixed with each of the polyester resin and cationic dyed polyester resin obtained in this way (S300). Here, antimony tin oxide is a semiconductor material that is variously used even in places requiring antistatic and transparent conductivity, such as a display panel or glass plastic, and is added to shield infrared rays incident from the outside in the present invention.

The antimony tin oxide added to the resin is preferably a powder having an average particle diameter of 10 to 500 nm. If the diameter is less than 5 nm, it is too fine to manufacture, and if it exceeds 500 nm, it is uniformly dispersed with the resin. There is a problem in that fibers are cut off or cause defects during spinning.

In addition, if the amount of antimony tin oxide mixed in the resin is large, extrusion moldability is deteriorated during spinning, and an appropriate amount that exhibits heat barrier performance is mixed, and at this time, polyester resin and cationic dyed polyester resin having a difference in strength are applied to each. mixed in different amounts.

That is, the cationic dyed polyester resin has a lower strength compared to the polyester resin, and a smaller amount of antimony tin oxide is added than that of the polyester resin. % is mixed, and 0.1 to 1% by weight of thymon tin oxide is mixed with 99 to 99.9% by weight of the cationic dyed polyester resin.

Such cationic dyed polyester resin has a low strength, so the durability of the fabric is not good during weaving, and it is difficult to melt spinning due to a low melting point compared to polyester resin, but it has the advantage of being able to dye vividly.

As described above, by mixing and spinning cation-dyed polyester resin with excellent dyeability and polyester resin with superior strength compared to cation-dyed polyester resin, effective melange effect during dyeing is expressed, while yarn of sufficient strength can be realized. have.

At this time, the obtained polyester resin has a relative viscosity of 0.79 to 0.82, a water content of 10 to 35 ppm, a melting temperature of 230 to 270 ° C and a glass transition temperature of 68 to 73 ° C, and the cationic salted polyester resin has a relative viscosity of 0.81 to 0.85, and a water content By using 10-35ppm, melting temperature 210-250℃, and glass transition temperature of 71-73℃, it is possible to stably spin as follows.

And, the weight ratio of the polyester resin and the cationic dyed polyester resin can be 30:70 to 70:30 (polyester resin: cationic dyed polyester resin), when the polyester resin ratio is less than 30, the cationic dyed poly The ester resin is excessive and the strength and elongation are lowered, making subsequent sanding difficult, and the melange effect is not properly expressed.

Next, the polyester resin and cationic dyed polyester resin prepared in this way are put into a spinneret and mixed and spun (S400). Polyester resin and cationic dyed polyester resin are fed into a spinneret through a separate supply pipe, and each of the injected resins is melted and spun by a spinneret heated to 290~310°C. At this time, the spinneret is designed so that each resin input is not mixed with each other, and only one type of spinning solution is discharged from each spinneret through which the spinning solution is discharged.

At this time, it is preferable that the spun polyester yarn and cation-dyed polyester yarn have different fineness as shown in FIG. 2 so that an excellent melange effect is expressed during dyeing. Polyester yarn is spun at a fineness of 30-50 denier.

Next, the mixed spun polyester yarn and cationic dyed polyester yarn are twisted to prepare a mixed yarn (S500). First, the spinning polyester yarn and cationic dyed polyester yarn are cooled in a cooling zone provided adjacent to the spinneret. At this time, it is preferable to perform slow cooling so as not to damage the internal structure of the polyester, and it is cooled with air at a wind speed of 8 to 40 m/min at a temperature of 40° C. to 65° C., and an oil agent may be supplied to improve workability.

As shown in FIG. 2, the cooled polyester yarn and cationic dyed polyester yarn are first heat-set while passing through the first feed roller and passing through the first heater. Here, it is preferable that the temperature of the first heater is 160 to 180 ° C. If it is less than 160 ° C, heat setting of the polyester yarn having a relatively high melting temperature is not performed properly, and when it exceeds 180 ° C, the cation having a relatively low melting temperature There is a problem in that the dyed polyester yarn is melted. Next, heat-set polyester yarn and cation-dyed polyester yarn are supplied to a disc twisting device and twisted with a de-twisting tension of 15 to 30 N/m to give elasticity and soft touch. At this time, the disc twisting device has less friction with yarn than the belt-type twisting device, so that the cationic dyed polyester yarn, which has weak strength, is not trimmed during the false twisting process.

Then, it is entangled in an entangling device at an air pressure of 0.5 to 3.0 kg/cm 3 through the second feed roller, and then stretched at a draw ratio of 1.6 to 1.8 using the speed difference between the second feed roller and the third feed roller. At this time, if the draw ratio is less than 1.6, unstretching may occur, and if the draw ratio exceeds 1.8, the cationic dyed polyester yarn having weak strength due to excessive stretching may occur. At this time, the overfeed rate between the second feed roller and the third feed roller is preferably 2.0 to 8.0%. If the overfeed rate is less than 2.0%, the problem of undissolving occurs due to excessive tension, and when it exceeds 8.0%, the may occur. After stretching as described above, the second heat treatment is performed by passing a second heater at 120 to 160° C., and then winding in a winding beam at a speed of 2,500 to 4,000 m/min to manufacture a mixed fiber yarn.

Next, the blended yarn thus prepared is put into an air entangling device and braided (S600). At this time, the air pressure flowing into the air entanglement device is supplied at 1.7 kgf/cm2~2.0 kgf/cm2. If the air pressure is less than 1.7 kgf/cm2, it is difficult to entangle the mixed yarn sufficiently due to the insufficient pressure of the supplied air, and the pressure is 2.0 If it exceeds kgf/cm 2 , due to excessive pressure of the supplied air, the mixed filaments may become tangled and partially agglomerate may occur. The fineness of the composite yarn produced by plying in this way is manufactured in 100 to 200 denier. If the fineness is less than 100 denier, the strength is reduced due to the addition of the added antimony tin compound. There is a problem in that the delicate textured surface is not expressed.

Hereinafter, the present invention will be described in more detail through the following examples.

<Example>

The waste polyester PET bottle was collected and crushed into flakes having a size of 2-3 mm using a grinder, and then dried to obtain a polyester resin. The polyester resin thus obtained was obtained by adding 2 wt% of an antimony tin compound to a 98 wt% polyester resin chip having a relative viscosity of 0.8, a water content of 30 ppm, a melting temperature of 240 °C and a glass transition temperature of 700 °C, and then mixing them evenly. A tin compound-added polyester resin was prepared. In addition, 0.5 wt% of antimony tin compound was added to the 99.5 wt% cationic dyed polyester chip having a relative viscosity of 0.83, a water content of 25 ppm, a melting temperature of 220 °C and a glass transition temperature of 72 °C, and then evenly mixed to add an antimony tin compound. A dyed polyester resin was prepared.

The prepared antimony tin compound-added polyester resin and antimony tin compound-added cationic dyed polyester resin were simultaneously supplied to the spinneret through a separate supply conduit in a weight ratio of 60:40, and then spun at a spinning temperature of 295°C. After cooling with air at 45° C. with a wind speed of 20 m/min, it was false-twisted with a false twisting device to prepare a mixed yarn. After false twisting under the conditions of a first heater temperature of 170°C during false twisting, a de-twisting tension of 20 N/m of a disc false twisting device, a draw ratio of 1.7, an overfeed rate of 5.0% between the second and third feed rollers, and a second heater temperature of 170°C, It was wound at a speed of 2,000 m/min to prepare a mixed yarn of 75 denier. Then, two strands of the prepared mixed yarn were braided using an air entangling device having an air pressure of 2.0 kgf/cm 2 to prepare a 150 denier composite yarn. The fabric for blinds was prepared by weaving the composite yarn prepared in this way in plain weave with warp and weft yarns, and then immersed in a dye solution composed of a navy color and then heated and dyed.

<Melange Effect>

Figure 4 is a surface photograph of the example, it was confirmed that the navy (navy) color is naturally expressed in different tones due to the different dyeing properties of the polyester and cation-dyed polyester.

<Heat blocking performance>

The solar transmittance of the Example was measured according to the KS L 2514:2011 test method, and it was confirmed that the Example had an excellent solar reflectance of 30%.

<Composite yarn strength and elongation>

As a result of measuring the strength and elongation of the composite yarn according to the example, the tensile strength is 4.3 g/d, which has excellent strength despite the weak cation-dyed polyester yarn being mixed, and the elongation is 35%, which is nano-powdered antimony. Although the tin compound was added, it was confirmed that the elongation was also excellent.

As such, the present invention can contribute to environmental protection by recycling polyester products thrown away as waste and using biodegradable materials, and excellent melange by mixing and spinning the polyester resin obtained therefrom and cationic dyed polyester yarn having different dyeability In addition to the effect, the added antimony tin oxide has excellent heat blocking performance, and when weaving as blinds, it is possible to not only create a luxurious interior space, but also effectively block the heat flowing in from the outside and the heat flowing out of the room.

The present invention described above is not limited to the described embodiments, and it is apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the present invention. Accordingly, it should be said that such variations or modifications fall within the scope of the claims of the present invention.

Claims (4)

crushing the waste polyester product into flakes;
drying the crushed waste polyester flakes to obtain a polyester resin;
mixing 1.5 to 3% by weight of antimony tin oxide with 97 to 98.5% by weight of the polyester resin;
mixing 0.1 to 1% by weight of antimony tin oxide to 99 to 99.9% by weight of cationic dyed polyester resin;
The antimony tin oxide-added polyester resin and cationic dyed polyester resin are put into a heated spinneret heated to 290 to 310° C., mixing the polyester and cationic dyed polyester yarns;
Cooling and twisting the mixed spun polyester yarn and cationic dyed polyester yarn to prepare a mixed yarn; and,
Method for producing a polyester composite yarn for blinds, comprising a; the step of braiding the mixed yarn by air entangling. According to claim 1,
Polyester composite yarn for blinds, characterized in that the waste polyester product is dried to a residual moisture content of 0.05% or less by crushing flakes having a size of 1 to 5 mm 3. The method of claim 2,
The polyester yarn has a fineness of 70 to 150 denier, and the cationic dyed polyester yarn is a method for producing a polyester composite yarn for blinds, characterized in that it is different from each other by 30 to 50 denier. 4. The method of claim 3,
The polyester composite yarn has a strength of 4.3 g/d and an elongation of 35%. A method for producing a polyester composite yarn for blinds.

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