KR102274938B1 - Polyester composite fiber and nonwoven fabric using the same - Google Patents

Abstract

The present invention relates to a nonwoven fabric including regenerated polyester fibers, and more specifically, to a nonwoven fabric made by mixing regenerated polyester staple fibers and polyester composite staple fibers, wherein a sheath unit of the regenerated polyester staple fibers is made of a low-melting polyester resin containing copper particles, thereby providing excellent adhesive strength and antibacterial properties.

Description

Polyester composite fiber and nonwoven fabric using the same

The present invention relates to a nonwoven fabric comprising short polyester composite fibers including a core portion and a sheath portion.

More specifically, it relates to a nonwoven fabric having excellent adhesive strength and antibacterial properties by using a polyester composite short fiber having a sheath comprising a low-melting polyester resin and copper particles.

Polyester is used in various industrial fields due to its excellent mechanical strength, heat resistance, chemical resistance, and moldability, and the field of application is expanding. In particular, it has excellent adhesive strength that can replace acrylic resin widely used as a chemical adhesive, and has characteristics such as high formability, waterproofness, tensile strength, elongation, thermal stability, and elastic recovery, making it a raw material for the manufacture of various nonwovens. is being used

Accordingly, there is a need for the development of adhesives using low-melting polyester fibers.

In addition, in recent years, interest in recycling waste such as waste polyester generated during the manufacturing process of polyester fiber, film, etc. or waste polyester that is discarded after use has been on the rise.

Since polyester cannot be reused after being melted at a temperature higher than its melting point, it is impossible to use ethylene glycol to glycolyze waste polyester through depolymerization to produce an oligomer, or recover it as a raw material such as terephthalic acid or ethylene glycol, or use bis as an intermediate product. A process for recovering -2-hydroxyethyl terephthalate (BHET) is known. As such, when the regenerated polyester fiber produced using the recovered raw material is applied to the nonwoven fabric, there is a disadvantage in that the strength of the nonwoven fabric, particularly, the adhesive strength is lowered.

Korean Patent Publication No. 10-2011-0109533 (2011.10.06)

One object of the present invention is to provide a nonwoven fabric having further improved adhesive strength when manufacturing a nonwoven fabric using a low melting point polyester resin.

In addition, an object of the present invention is to provide a nonwoven fabric having superior adhesive strength even when the regenerated polyester fiber is included.

As a result of research to achieve the above object, the present inventors prepared a nonwoven fabric using a polyester composite fiber including a core portion and a sheath portion, and at this time, a low-melting-point polyester having a softening temperature in the range of 100 to 130 ℃ in the sheath portion By including the resin and copper particles, it was found that a nonwoven fabric having not only adhesive strength but also antibacterial properties could be provided, thereby completing the present invention.

One aspect of the present invention is a nonwoven fabric comprising short polyester composite fibers,

The polyester composite short fiber includes a core part and a sheath part,

The core part is made of a polyester resin having a melting point in the range of 250 to 260 ℃,

The sheath provides a nonwoven fabric comprising a low-melting-point polyester resin and copper particles having a softening temperature in the range of 100 to 130 ℃.

In one aspect, the nonwoven fabric may have an adhesive strength according to KS K ISO9073-3 that satisfies the following Equation 1.

[Equation 1]

AD1 > AD2

In Equation 1, AD1 is the adhesive strength of the nonwoven fabric including the short composite fibers including copper particles in the sheath portion, and AD2 is the adhesive strength of the nonwoven fabric including the composite short fibers not including the copper particles in the sheath portion.

In one embodiment, the adhesive strength of AD1 may be increased by 2% or more compared to the adhesive strength of AD2.

In one aspect, the nonwoven fabric may have an adhesive strength of 20 N/g or more according to KS K ISO9073-3.

In one aspect, the nonwoven fabric may further include regenerated polyester short fibers.

In one embodiment, the polyester composite staple fiber and the regenerated polyester staple fiber may be included in a weight ratio of 2:8 to 5:5.

In one aspect, the nonwoven fabric may have an antibacterial property of 99% or more according to KS K 0693:2016.

In one aspect, the regenerated polyester short fibers may be made of a polyester resin having a melting point in the range of 250 to 260 °C.

In one embodiment, based on the total weight of the nonwoven fabric, the copper particles may be included in an amount of 50 to 500 ppm.

In one embodiment, the copper particles may have an average diameter of 1 to 100 nm. More specifically, the average diameter may be 2 to 10 nm.

In one aspect, the polyester composite short fibers and the regenerated polyester short fibers may have a length of 5 to 80 mm.

In one aspect, the sheath portion of the short polyester composite fiber may have a glass transition temperature of 50 to 75 °C, and a melting point of 100 to 180 °C.

In one aspect, the polyester composite short fibers may have a fineness of 2 to 15 monodenier.

In one aspect, the polyester composite short fibers may have a strength of 3 g/d or more and an elongation of 30% or more.

Another aspect of the present invention is a polyester composite fiber comprising a core portion and a sheath portion,

The core part is made of a polyester resin with a melting point in the range of 250 to 260 ℃, and the sheath part provides a polyester composite fiber comprising a low-melting polyester resin and copper particles having a softening temperature in the range of 100 to 130 ℃ .

In one aspect, with respect to the total weight of the polyester-polyester composite fiber, the copper particles may be included in an amount of 50 to 1000 ppm.

In one embodiment, the copper particles may have an average diameter of 1 to 100 nm. More specifically, the average diameter may be 2 to 10 nm.

In one aspect, the sheath portion may have a glass transition temperature of 50 to 75 °C, and a melting point of 100 to 180 °C.

In one aspect, the polyester composite fiber may have an antibacterial property of 99% or more according to KS K 0693:2016.

The polyester composite fiber and the nonwoven fabric including the same according to the present invention have excellent durability and mechanical strength, and in particular, have an effect of remarkably excellent adhesive strength.

Specifically, since the polyester composite fiber contains copper particles and a low-melting polyester resin in the sheath, the adhesive strength of the non-woven fabric is 2% or more compared to the case of using a composite fiber made of only a low-melting polyester resin without copper particles. , 5% or more, 10% or more, 15% or more improved effect can be expressed.

In addition, it is possible to express the effect of imparting antibacterial properties along with the adhesive strength.

In addition, the nonwoven fabric according to an embodiment of the present invention may include a polyester composite fiber and a regenerated polyester fiber, and may exhibit excellent adhesive strength despite including the regenerated polyester fiber.

Hereinafter, the present invention will be described in more detail. However, the following specific examples or examples are only a reference for describing the present invention in detail, and the present invention is not limited thereto, and may be implemented in various forms.

Also, unless defined otherwise, all technical and scientific terms have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description herein is for the purpose of effectively describing particular embodiments only and is not intended to limit the invention.

Also, the singular forms used in the specification and appended claims may also be intended to include the plural forms unless the context specifically dictates otherwise.

In addition, when a part "includes" a certain component, this means that other components may be further included, rather than excluding other components, unless otherwise stated.

The inventors of the present invention can express more excellent adhesive strength when manufacturing a nonwoven fabric using polyester fibers, and also use general polyester fibers instead of recycled when manufacturing a nonwoven fabric by mixing regenerated polyester fibers. As a result of research in order to express the same level of adhesive strength as that of the above, it was found that the purpose can be achieved by manufacturing a nonwoven fabric including a core-sheath type polyester composite fiber including a specific core part and a sheath part. Found and completed the present invention.

In particular, by using a low-melting polyester resin in the sheath of the polyester composite fiber, the adhesiveness can be further improved, and by including copper particles, compared to the case of using only a low-melting-point polyester resin without including copper particles The present invention was completed by discovering that the adhesive strength could be further improved by 2% or more, as well as providing antibacterial properties at the same time.

First, a polyester composite short fiber that can be used in the nonwoven fabric of the present invention will be described.

In one aspect of the present invention, the polyester composite short fiber may be a core-sheath type polyester composite fiber comprising a core part and a sheath part cut to have a length of 5 to 80 mm, and the length is limited to no.

In one aspect of the present invention, the polyester composite fiber has a core-sheath shape including a core part and a sheath part, and the core part is made of a polyester resin having a melting point of 250 to 260 ° C., and the sheath part has a softening temperature. It contains a low melting point polyester resin and copper particles in the range of 100 to 130 ℃.

In one aspect of the present invention, the core part is the center of the fiber, the sheath part is a term meaning the outer part, and the sheath part may have a structure that completely surrounds the core part, but is not necessarily limited thereto, and the physical property control according to the usage form of the composite fiber It can be changed at a normal level for

In one aspect of the present invention, the copper particles are preferably present only in the sheath portion, which is to express antibacterial properties through direct contact with bacteria. In addition, since the intrinsic viscosity is lowered by mixing it with the low-melting polyester, it is possible to provide better adhesive strength when manufacturing the nonwoven fabric. The nonwoven fabric thus prepared has the effect of further improving the adhesive strength compared to the case where copper particles are not included, and specifically, the adhesive strength is increased by 2% or more, 5% or more, 10% or more, 15% or more.

In the case of including copper particles in both the sheath part and the core part during the manufacture of the composite fiber, defects may occur in the fiber structure itself, which may cause a problem in which the strength of the composite fiber is lowered, as well as in the core part containing copper particles. Since it is not effective for antimicrobial expression, it is preferable to include it only in the sheath part.

The copper particles may be pre-mixed with a low-melting-point polyester resin used in the sheath in order to be evenly dispersed in the sheath, prepared as a masterbatch, and then used.

In one aspect of the present invention, the copper particles may be copper nanoparticles, or may be copper-supported zeolite particles.

The zeolite may be any of natural zeolite and synthetic zeolite. More specifically, A-type zeolite, X-type zeolite, Y-type zeolite, T-type zeolite, high silica zeolite, sodalite, mordenite, anarsite, clinoptilolite, chabasite, elionite and the like. The copper ions may be supported in 0.1 to 15% by weight of the zeolite, but is not limited thereto.

The copper particles may be particles having an average diameter of 1 to 100 nm, 2 to 50 nm, and 2 to 10 nm.

The copper particles may be included in an amount of 50 to 1000 ppm, more specifically 50 to 300 ppm, and 100 to 200 ppm, based on the total weight of the composite fiber, but is not limited thereto, but provides better adhesive strength and antibacterial properties in the above range can do. In particular, as the content of copper particles increases, the intrinsic viscosity of the fiber is lowered, and thus the adhesive strength can be further improved when manufacturing the nonwoven fabric. However, if it is included in an excessively high content, the strength of the fiber may be reduced, so it is preferable to include it in the above range.

In one aspect of the present invention, the polyester composite fiber has a core part made of a polyester resin having a melting point of 250 to 260 ℃, a softening temperature of a low-melting polyester resin in the range of 100 to 130 ℃ and a sheath made of copper particles It may consist of wealth.

The core part is made of a polyester resin having a melting point of 250 to 260° C., which may be used without limitation as long as it is a conventional polyester resin. Specifically, it may be a polyethylene terephthalate resin.

By satisfying the range of 250 to 260° C. of the core, the fibers are completely melted and not fused in the process of performing thermocompression bonding during manufacturing of the nonwoven fabric, and a portion can be bonded by maintaining the fiber shape.

The sheath portion is made of a low-melting polyester resin having a softening temperature in the range of 100 to 130 ℃, more specifically, 105 to 120 ℃, and includes copper particles. When the softening temperature of the sheath satisfies the above range, it is possible to have excellent adhesion to the regenerated polyester fiber in the process of thermocompression bonding during manufacturing of the nonwoven fabric.

In addition, although not limited thereto, the glass transition temperature may be 50 to 75 ° C., more specifically 55 to 70 ° C., and the melting point may be 100 to 180 ° C., more specifically 105 to 170 ° C., in the above range, the recycled polyester fiber It is good because excellent adhesive strength can be expressed when manufacturing a nonwoven fabric by mixing with it.

The low-melting polyester resin is prepared by a conventional manufacturing method, but is not limited thereto, but may be prepared in the following two aspects.

Specifically, one embodiment catalyzes a diol component of 100 mol% of terephthalic acid (TPA), 55 to 65 mol% of ethylene glycol (EG), and 35 to 45 mol% of 2-methyl-1,3-propanediol (MPO). After preparing an oligomer by esterification reaction in the presence, it may be prepared by polycondensation.

Another embodiment is an acid component comprising 60 to 80 mol% of terephthalic acid or a derivative thereof and 20 to 40 mol% of isophthalic acid or a derivative thereof, and a diol component comprising 70 to 90 mol% of ethylene glycol and 10 to 30 mol% of diethylene glycol After preparing an oligomer by esterification in the presence of a catalyst, it may be prepared by polycondensation.

As the catalyst, one or a mixture of two or more selected from the group consisting of antimony carbonate, antimony glycolate, antimony triacetate and antimony trioxide or a mixture thereof may be used, but is not limited thereto.

In the oligomerization step, the acid component and the diol component may undergo an esterification reaction in a temperature range of 240 to 270° C., but is not limited thereto. Specifically, a pressure of 0 to 10.0 kg/cm ² may be applied and the reaction may be performed in the above temperature range for 2 to 24 hours.

The condensation polymerization reaction may be a reaction of the oligomer produced by the esterification reaction at 270 to 300 °C. Specifically, the polycondensation reaction is continued for 1 hour to 24 hours under reduced pressure of 400 to 0.01 mmHg, and the reaction is terminated when the intrinsic viscosity is 0.2 to 0.8 dl/g to produce the low melting point polyester. can, but is not limited thereto.

The reaction molar ratio of the acid component and the diol component is preferably 1:1 to 1:2, but is not limited thereto.

The degree of polymerization (Pn) of the low-melting-point polyester is controlled by the condensation polymerization reaction, and is preferably prepared in a range of 80 to 120, but is not limited thereto.

The polyester composite short fibers are not limited, but may have a fineness of 2 to 15 monodenier, and may have an easy cross-section in the above range and excellent processability.

The polyester composite short fibers are not limited, but may have a strength of 3 g/d or more, an elongation of 30% or more, and may provide a nonwoven fabric having excellent mechanical properties within the above range.

As the polyester composite short fiber contains copper particles, more specifically, by including the copper nanoparticles in an amount of 50 to 300 ppm based on the total weight of the polyester composite fiber, it is possible to impart not only adhesive strength but also antibacterial properties, Even better, by including 100 to 200 ppm, antibacterial properties according to KS K 0693:2016 can achieve 99% or more physical properties.

In one aspect of the present invention, the regenerated polyester short fiber means a fiber manufactured using a regenerated polyester resin cut to a length of 5 to 80 mm, and the fiber length is not limited thereto.

The regenerated polyester fiber means that a polyester resin is manufactured by reusing a raw material depolymerized according to a conventional method, and then manufactured into a fiber.

The regenerated polyester fiber may be made of a regenerated polyester resin having a melting point in the range of 250 to 260° C., but is not limited thereto, but may provide a nonwoven fabric having excellent mechanical properties within the range.

In one aspect of the present invention, the nonwoven fabric may include a polyester composite short fiber, and the adhesive strength according to KS K ISO9073-3 in the above range satisfies the following formula 1, and at the same time according to KS K 0693:2016 It is possible to provide a nonwoven fabric satisfying physical properties of 99% or more in antibacterial properties.

[Equation 1]

AD1 > AD2

In Equation 1, AD1 is the adhesive strength of the nonwoven fabric including the short composite fibers including copper particles in the sheath portion, and AD2 is the adhesive strength of the nonwoven fabric including the composite short fibers not including the copper particles in the sheath portion.

In addition, in one aspect of the present invention, the nonwoven fabric may include a polyester composite staple fiber and a regenerated polyester staple fiber in a weight ratio of 2: 8 to 5: 5, and in the above range, adhesion according to KS K ISO9073-3 It is possible to provide a nonwoven fabric having a strength that satisfies the following Equation 2 and at the same time satisfies physical properties of 99% or more in antibacterial properties according to KS K 0693:2016.

[Equation 2]

AD1 > AD2

In Equation 2, AD1 is the adhesive strength of the nonwoven fabric including the composite staple fiber containing copper particles in the sheath part and the regenerated polyester staple fiber in 3:7 parts by weight, AD2 is the composite staple fiber containing no copper particles in the sheath part and the adhesive strength of the nonwoven fabric containing regenerated polyester staple fibers at 3:7 parts by weight.

More specifically, in Equations 1 and 2, the adhesive strength of AD1 may be increased by 2% or more, 5% or more, 10% or more, 15% or more compared to the adhesive strength of AD2. That is, it can be confirmed that more improved adhesive strength can be provided by including copper particles as compared to the case of using a composite fiber made of only a low-melting-point polyester resin without including copper particles in the sheath.

In addition, it is possible to provide a nonwoven fabric having excellent adhesive strength despite the excessive use of the regenerated polyester fibers compared to the short polyester composite fibers in a weight ratio of 5 to 8.

More specifically, it is possible to provide a nonwoven fabric having an adhesive strength of 20 N/g or more, more specifically 20 to 100 N/g according to KS K ISO9073-3.

Next, a method for manufacturing the nonwoven fabric of the present invention will be described in detail.

A method for manufacturing a nonwoven fabric according to an aspect of the present invention comprises the steps of carding a sheath-core type polyester composite staple fiber and a regenerated polyester staple fiber and stacking them in the form of a web, and thermally bonding the fibers laminated in the form of the web. It can be prepared including.

In the thermal bonding step, thermocompression bonding using a high-temperature and high-pressure roll or inducing thermal bonding using a high-temperature hot air may be performed.

The temperature during the thermal bonding step may be carried out at a temperature of 140 to 170 ° C. In the above range, the sheath portion of the short polyester composite fiber is fused to prepare a nonwoven fabric having excellent adhesive strength.

In one aspect of the present invention, the method for producing the sheath-core type polyester composite short fiber is not limited, but a master batch by melt-kneading a low-melting-point polyester resin and copper particles having a softening temperature in the range of 100 to 130 ° C. preparing a; And the masterbatch and the low-melting polyester resin having a softening temperature of 100 to 130 ℃ are mixed and melt-extruded to form a sheath part, and a polyester resin having a melting point of 250 to 260 ℃ is melt-extruded to form a core part by pneumatic pressure. It may be to prepare a sheath-core type polyester composite fiber by including the step of shipping. After that, if necessary, it may further include a stretching step, and short fibers can be prepared by cutting to a desired length.

When the masterbatch and the low-melting-point polyester resin having a softening temperature in the range of 100 to 130 ℃ are mixed and melt-extruded to become a sheath, the content of the masterbatch is adjusted, based on the total weight of the polyester composite short fibers, the Containing copper particles at 50 to 1000 ppm, specifically 100 to 200 ppm, can produce fibers with increased elongation without significantly lowering the strength compared to those without copper particles, and excellent antibacterial properties It's nice to be able to provide fiber. In addition, by using the polyester composite fiber including the sheath portion, it is possible to provide a nonwoven fabric having excellent adhesive strength despite the mixed use of recycled polyester fibers.

In addition, when manufacturing the nonwoven fabric by mixing the polyester composite fiber and the regenerated polyester fiber, the polyester so that the content of copper particles in the total weight of the nonwoven fabric is 50 to 500 ppm, more specifically 50 to 300 ppm, and 50 to 200 ppm It may be used by adjusting the content of the composite fiber, and it is possible to provide a nonwoven fabric having superior adhesive strength and excellent antibacterial properties within the above range.

Hereinafter, the present invention will be described in more detail based on Examples and Comparative Examples. However, the following Examples and Comparative Examples are merely examples for explaining the present invention in more detail, and the present invention is not limited by the following Examples and Comparative Examples.

[Adhesive strength]

Adhesive strength was measured according to the nonwoven fabric test standard KS K ISO9073-3 (Textile-Nonwoven Fabric Test Method Part 3: Tensile Strength and Elongation Measurement).

[Antibacterial]

Antibacterial activity was measured according to KS K 0693:2016 bacteriostatic reduction rate.

[Fiber strength and elongation]

The strength and elongation of the fibers were measured according to KS K 0693.

[Examples 1 to 3] Preparation of polyester composite fibers

A masterbatch was prepared by melt-extruding a low-melting polyester resin having a softening temperature of 120 °C and a melting point of 140 °C and copper nanoparticles having an average diameter of 5 nm.

A composite fiber of a sheath-core type was manufactured using composite spinning, and the sheath part was mixed with the masterbatch and a low-melting-point polyester resin having a softening temperature of 120 °C and a melting point of 140 °C, and the core part had a melting point of 255. ℃ polyester resin was added to prepare a polyester composite fiber.

The polyester composite fiber was prepared in a weight ratio of core part: sheath part 5: 5 weight ratio.

At this time, the content of the masterbatch was added to control the copper content in the fiber as shown in Table 1 below.

The physical properties of the prepared polyester composite fibers were measured and shown in Table 1 below.

[Comparative Example 1]

As shown in Table 1 below, a polyester composite fiber was prepared in the same manner as in Example 1, except that copper nanoparticles were not used.

The physical properties of the prepared polyester composite fibers were measured and shown in Table 1 below.

Comparative Example 1 Example 1 Example 2 Example 3 Copper content in fiber (based on sheath, ppm) 0 200 250 300 Copper content in total fiber (ppm) 0 100 125 150 Fiber Intrinsic Viscosity (g/dL) 0.534 0.550 0.550 0.550 Strength (g/d) 3.2 3.3 3.3 3.3 Elongation (%) 38.5 40.1 38.7 39.2

As shown in Table 1, it was confirmed that as in Examples 1 to 3, copper particles were included in the sheath portion, and as compared to Comparative Example 1, there was no influence on the strength and elongation of the fiber. In the case of Comparative Example 1, the bacteriostatic reduction rate was 62.4% in Staphylococcus aureus and 45.9% in Pneumococcus, but Examples 1 to 3 showed antibacterial activity of 99.99% or more in both Staphylococcus aureus and Pneumococcus pneumoniae. .

[Example 4]

Polyester composite fibers were prepared in the same manner as in Example 1, except that the content of copper particles used in the sheath was as shown in Table 2 below, and cut to a length of 51 mm to prepare short fibers.

In addition, a regenerated polyester fiber having a melting point of 250° C. was prepared and cut to a length of 65 mm to prepare short fibers.

The prepared polyester composite staple fibers (A) and regenerated polyester staple fibers (B) were mixed and carded in a weight ratio of 3:7 as shown in Table 2 below, and then fused in a hot air dryer at 160 ° C. for 10 minutes to prepare a nonwoven fabric. did.

The physical properties of the prepared nonwoven fabric were measured and shown in Table 2 below.

[Examples 5 to 8]

In the same manner as in Example 4, except that the content ratio of the polyester composite staple fibers (A) and the regenerated polyester staple fibers (B) was adjusted or the content of copper particles was adjusted during the preparation of the nonwoven fabric as shown in Table 2 below, the nonwoven fabric was prepared in the same manner as in Example 4 was prepared.

[Comparative Example 2]

The polyester composite fiber (which does not contain copper particles in the sheath portion) prepared in Comparative Example 1 was cut to a length of 51 mm to prepare short fibers, and this was the polyester composite staple fiber (A) of Example 4 A nonwoven fabric was prepared in the same manner as in Example 4, except that it was used instead of .

Comparative Example 2 Example 4 Example 5 Example 6 Example 7 Example 8 Copper content in fiber (based on sheath, ppm) 0 333 333 667 667 1080 Fiber Intrinsic Viscosity (g/dL) 0.534 0.550 0.550 0.539 0.539 0.528 Fiber ratio in nonwoven fabric A:B (weight ratio) 3:7 3:7 5:5 3:7 4:6 3:7 Copper content in nonwoven fabric (ppm) 0 50 83 100 133 150 Adhesive strength (N/g) 22.7 23.2 49.9 27.7 42.0 30.3

As shown in Table 2, it was confirmed that the adhesive strength increased as the content of the polyester composite short fibers increased, that is, as the content of copper particles used in the sheath increased. In addition, when comparing Comparative Example 1 and Example 4 having the same content of regenerated polyester short fibers, it was confirmed that the adhesive strength was improved by 2.2% in Example 4 by including copper particles as compared to Comparative Example 1.

In addition, it was confirmed that Examples 4 to 8 exhibited antibacterial properties of 99.99% or more in both Staphylococcus aureus and Bacillus pneumoniae.

As described above, the present invention has been described by specific matters and limited examples, but these are provided to help a more general understanding of the present invention, and the present invention is not limited to the above examples, and the field to which the present invention belongs Various modifications and variations are possible from these descriptions by those of ordinary skill in the art.

Therefore, the spirit of the present invention should not be limited to the described embodiments, and not only the claims to be described later, but also all those with equivalent or equivalent modifications to the claims will be said to belong to the scope of the spirit of the present invention. .

Claims (16)

A nonwoven fabric comprising a polyester composite staple fiber and a regenerated polyester staple fiber,
The polyester composite short fiber includes a core part and a sheath part,
The core part is made of a polyester resin having a melting point in the range of 250 to 260 ℃,
The sheath includes a low-melting-point polyester resin and copper particles having a softening temperature in the range of 100 to 130 ℃,
The nonwoven fabric that the polyester composite staple fiber and the regenerated polyester staple fiber are included in a weight ratio of 2:8 to 5:5.
The method of claim 1,
The nonwoven fabric has an adhesive strength according to KS K ISO9073-3 that satisfies the following formula 1.
[Equation 1]
AD1 > AD2
In Equation 1, AD1 is the adhesive strength of the nonwoven fabric including the short composite fibers including copper particles in the sheath portion, and AD2 is the adhesive strength of the nonwoven fabric including the composite short fibers not including the copper particles in the sheath portion.
3. The method of claim 2,
The nonwoven fabric wherein the adhesive strength of AD1 is increased by 2% or more compared to the adhesive strength of AD2.
3. The method of claim 2,
The nonwoven fabric has an adhesive strength of 20 N/g or more according to KS K ISO9073-3.
The method of claim 1,
The nonwoven fabric has an antibacterial property of 99% or more according to KS K 0693:2016.
delete delete The method of claim 1,
Based on the total weight of the nonwoven fabric, the nonwoven fabric will contain 50 to 500 ppm of the copper particles.
The method of claim 1,
The polyester composite short fiber is a nonwoven fabric having a length of 5 to 80 mm.
The method of claim 1,
The regenerated polyester short fiber is a nonwoven fabric having a length of 5 to 80 mm.
The method of claim 1,
The sheath portion of the polyester composite short fiber has a glass transition temperature of 50 to 75 °C, and a melting point of 100 to 180 °C.
The method of claim 1,
The polyester composite short fiber is a nonwoven fabric having a fineness of 2 to 15 monodenier.
The method of claim 1,
The polyester composite short fibers have a strength of 3 g/d or more, and a nonwoven fabric having an elongation of 30% or more.
delete delete delete