KR102315549B1 - Non-woven polyester for functional clothing textile with improved strength and durability and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a polyester nonwoven fabric for functional clothing textile and a method for manufacturing the same. The polyester nonwoven fabric for functional clothing textile according to the present invention has excellent tensile strength, heat deformation resistance, UV shielding property, flame retardancy, and the like, so that it can be utilized not only as a textile material for clothes for everyday wear, but also as a textile material for functional clothing that can be used in various industrial sites.

Description

Polyester nonwoven fabric for functional clothing with improved strength and durability and manufacturing method thereof

The present invention relates to a polyester nonwoven fabric for functional clothing fibers and a method for manufacturing the same, and specifically, it is excellent in strength, heat deformation resistance, UV protection, flame retardancy, etc. It relates to a polyester nonwoven fabric that can be used as a textile material and a method for manufacturing the same.

Conventionally, nonwoven fabrics have been widely used for various purposes in various fields, for example, clothing, furniture, hygiene, medical, agricultural or industrial fields. In particular, the nonwoven fabric used in the clothing industry constitutes the clothing fiber itself or is used in the core for clothing. As functional clothing for special purposes such as being used in an industrial field, various functions of the nonwoven fabric, one of its materials, are important. That is, as a material for clothing, not only convenient characteristics such as basic strength, elongation, durability, etc., but also functional characteristics in special situations such as UV protection, heat resistance, flame retardancy, and heat dissipation are often required.

In the case of such a nonwoven fabric, a web in which fibers are arbitrarily mixed is formed, and then the web is fixed and bound. As a method of fixing the web, mechanical bonding such as needle punching, chemical bonding such as spray bonding, and thermal fusion bonding Various methods such as direct bonding such as spun bonding and spun bonding are used. These fixing methods must be applied in an optimized method according to the type, amount, and function of the nonwoven material to obtain a high quality nonwoven fabric.

Domestic Registered Patent Publication No. 10-0389079

Accordingly, the problem to be solved by the present invention is to provide a polyester nonwoven fabric that can be used as a textile material for functional clothing that can be used not only for daily clothing but also for various industrial sites because it has excellent strength, heat deformation resistance, UV protection, flame retardancy, etc. will do

Another problem to be solved by the present invention is to provide a method for manufacturing the polyester nonwoven fabric as described above.

The problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description.

The composition for manufacturing a polyester nonwoven fabric according to an embodiment of the present invention for solving the above problems is 100 parts by weight of terephthalic acid, 50-80 parts by weight of ethylene glycol, and a sulfonate represented by the following formula (1) ( sulfonate) 100 parts by weight of polyethylene terephthalate (PET) having a number average molecular weight (M _{n ) of 15,000-21,000 prepared by polymerization of 30-50 parts by weight;}

[Formula 1]

(In Formula 1, R is one or more independently selected C ₁ to C ₁₂ alkyl, alkenyl, or ester)

1-10 parts by weight of zinc oxide (ZnO);

5-15 parts by weight of basalt fiber of 0.1-0.7 mm in thickness and 10-100 mm in length; and

1-5 parts by weight of a phenol-based stabilizer represented by one of the following Chemical Formulas 2-1 to 2-3.

[Formula 2-1]

[Formula 2-2]

[Formula 2-3]

The composition for preparing the polyester nonwoven fabric may refer to pellets prepared by polymerization and mixing, then cooling and drying.

Polyester nonwoven fabric for functional clothing fibers according to another embodiment of the present invention for solving the above problems includes a polyester fiber and a polyurethane fiber in a mass ratio of 1:0.05-0.2,

The polyester fiber,

_{A number average molecular weight (M n} ) prepared by polymerizing 100 parts by weight of terephthalic acid, 50-80 parts by weight of ethylene glycol, and 30-50 parts by weight of a sulfonate represented by Formula 1 above, 15,000- 100 parts by weight of 21,000 polyethylene terephthalate (PET);

1-10 parts by weight of zinc oxide (ZnO);

5-15 parts by weight of basalt fiber of 0.1-0.7 mm in thickness and 10-100 mm in length; and

1-5 parts by weight of a phenol-based stabilizer represented by one of Formulas 2-1 to 2-3,

The polyurethane fiber,

100 parts by weight of polyurethane having _{a number average molecular weight (M n} ) of 20,000-25,000 prepared by polymerizing polycarbonate diol and polyisocyanate having a melting temperature (T _{m ) of 100-160 ° C.} ; and

1-5 parts by weight of a phosphorus-based stabilizer represented by the following Chemical Formula 3 is included.

[Formula 3]

The composition for preparing a polyamide nonwoven fabric according to an embodiment of the present invention for solving the above other problems includes 100 parts by weight of terephthalic acid, 50-80 parts by weight of ethylene glycol, and a sulfonate represented by Formula 1 (sulfonate) 100 parts by weight of polyethylene terephthalate (PET) having a number average molecular weight (M _{n ) of 15,000-21,000 prepared by polymerization of 30-50 parts by weight;}

1-10 parts by weight of zinc oxide (ZnO);

5-15 parts by weight of basalt fiber of 0.1-0.7 mm in thickness and 10-100 mm in length; and

A polyester fiber composition comprising 1-5 parts by weight of a phenolic stabilizer represented by one of Chemical Formulas 2-1 to 2-3;

100 parts by weight of polyhexamethylenediamine adipamide (nylon 6,6) having a number average molecular weight of 13,000-20,000;

30-50 parts by weight of polylaurolactam (nylon 12) having a number average molecular weight of 13,000-20,000;

0.1 to 2 parts by weight of graphene oxide; and

and a polyamide fiber composition comprising 10-25 parts by weight of lyocell fibers.

Polyamide nonwoven fabric for functional clothing fiber according to another embodiment of the present invention for solving the above other problem includes a polyester fiber and a polyamide fiber in a mass ratio of 1:0.3-0.6, wherein the polyester fiber is terephthalic acid (Terephthalic acid) acid) 100 parts by weight, 50-80 parts by weight of ethylene glycol, and 30-50 parts by weight of a sulfonate represented by Formula 1 _{Polyethylene having a number average molecular weight (M n} ) of 15,000-21,000 100 parts by weight of terephthalate (PET);

1-10 parts by weight of zinc oxide (ZnO);

5-15 parts by weight of basalt fiber of 0.1-0.7 mm in thickness and 10-100 mm in length; and

1-5 parts by weight of a phenol-based stabilizer represented by one of Formulas 2-1 to 2-3,

The polyamide fiber, 100 parts by weight of polyhexamethylenediamine adipamide (nylon 6,6) having a number average molecular weight of 13,000-20,000;

30-50 parts by weight of polylaurolactam (nylon 12) having a number average molecular weight of 13,000-20,000;

0.1 to 2 parts by weight of graphene oxide; and

10-25 parts by weight of lyocell fibers.

In addition, it may further include a polyurethane fiber, the polyurethane fiber has a melting temperature (T _m ) of a number average molecular weight ( M _n ) of 20,000-25,000 polyurethane (polyurethane) 100 parts by weight; and 1-5 parts by weight of the phosphorus-based stabilizer represented by Formula 3 above.

The weight ratio of polyester fiber, polyurethane fiber and polyamide fiber may be 1:0.1:03-0.6.

A method of manufacturing a polyester nonwoven fabric for functional clothing fibers according to another embodiment of the present invention for solving the above other problems is (a-1) 100 parts by weight of terephthalic acid, 50-80 parts by weight of ethylene glycol preparing a polyethylene terephthalate (PET) composition _{having a number average molecular weight (M n} ) of 15,000-21,000 by polymerizing parts and 30-50 parts by weight of a sulfonate represented by Formula 1;

(a-2) After mixing 1-10 parts by weight of zinc oxide (ZnO) and 5-15 parts by weight of basalt fiber with 100 parts by weight of the PET composition at 180-200° C., at 200-230° C., the formulas 2-1 to Further mixing 1-5 parts by weight of a phenol-based stabilizer represented by one of 2-3;

(a-3) preparing polyester pellets by extruding the mixture and then cooling and drying the mixture at 50-70° C. for 3-5 hours;

(b-1) Polyurethane having a number average molecular weight (M _n ) of 20,000-25,000 by polymerizing polycarbonate diol and polyisocyanate having a melting temperature (T _{m ) of 100-160 ° C.} Preparing a composition, wherein the molar ratio of the OH group of the polycarbonate polyol and the NCO group of the polyisocyanate is 1:1-1.5;

(b-2) mixing 1-5 parts by weight of the phosphorus-based stabilizer represented by Formula 3 with 100 parts by weight of the polyurethane composition at 170-190°C;

(b-3) preparing polyurethane pellets by extruding the mixture and then cooling and drying the mixture at 50-65° C. for 3-6 hours;

(c) melt the polyester pellets and the polyurethane pellets at 230-240 ° C. and then mix spinning to form a fiber web, wherein the mass ratio of the polyester fibers and the polyurethane fibers contained in the fiber web is 1:0.05-0.2 phosphorus step; and

(d) spraying a silane adhesive represented by the following Chemical Formula 4 on the fiber web to form a nonwoven fabric.

[Formula 4]

Steps (a) and (b) may be performed independently of each other.

The sulfonate may be represented by the following Chemical Formula 1-1 or 1-2.

[Formula 1-1]

[Formula 1-2]

The melting temperature (T _m ) of the polymerized PET may be 120-200 °C.

A method for manufacturing a polyamide nonwoven fabric for functional clothing fibers according to an embodiment of the present invention for solving another problem of the present invention is

(a-1) 100 parts by weight of terephthalic acid, 50-80 parts by weight of ethylene glycol, and 30-50 parts by weight of a sulfonate represented by Formula 1 are polymerized to have a number average molecular weight (M _n ) preparing a polyethylene terephthalate (PET) composition of 15,000-21,000;

(a-2) After mixing 1-10 parts by weight of zinc oxide (ZnO) and 5-15 parts by weight of basalt fiber with 100 parts by weight of the PET composition at 180-200° C., at 200-230° C., the formulas 2-1 to Further mixing 1-5 parts by weight of a phenol-based stabilizer represented by one of 2-3;

(a-3) preparing polyester pellets by extruding the mixture and then cooling and drying the mixture at 50-70° C. for 3-5 hours;

(b-1) 100 parts by weight of polyhexamethylenediamine adipamide (nylon 6,6) having a number average molecular weight of 13,000-20,000 at 230-260° C., and polylaurolactam (nylon 12) having a number average molecular weight of 13,000-20,000 30 - Mixing -50 parts by weight, 0.1 to 2 parts by weight of graphene oxide and 10-25 parts by weight of lyocell fibers;

(b-2) extruding the mixture, then cooling and drying the mixture at 70-80° C. for 3-5 hours to prepare polyamide pellets;

(b-3) Melting the polyester pellets and the polyamide pellets at 230-240° C. and then mixing and spinning to form a fiber web, wherein the mass ratio of the polyester fibers and the polyamide fibers included in the fiber web is 1:0.3 -0.6; and

(b-4) spraying the silane adhesive represented by Chemical Formula 4 on the fiber web to form a nonwoven fabric.

Steps (a) and (b) may be performed independently of each other.

The fibrillation ratio Q of the lyocell fiber may be 10-30.

Between steps (b-3) and (c), (e-1) a number average by polymerizing polycarbonate diol and polyisocyanate _{having a melting temperature (T m ) of 100-160 ° C.} Molar ratio of the OH group of the polycarbonate polyol and the NCO group of the polyisocyanate to prepare a polyurethane composition having a molecular weight (M _{n ) of 20,000-25,000 is 1:1-1.5;}

(e-2) mixing 1-5 parts by weight of the phosphorus-based stabilizer represented by Formula 3 with 100 parts by weight of the polyurethane composition at 170-190° C.; and

(e-3) further comprising the step of preparing polyurethane pellets by cooling and drying the mixture at 50-65 ° C. for 3-6 hours after extruding,

The step (c) may be a step of forming a fiber web by mixing and spinning the polyurethane pellets after melting. The melting temperature may be the same.

Steps (e-1) to (e-3) may be performed independently of steps (a) and (b).

The details of other embodiments are included in the detailed description.

Polyester nonwoven fabric manufactured according to embodiments of the present invention has excellent strength, heat deformation resistance, UV protection, flame retardancy, etc. .

Effects according to the embodiments of the present invention are not limited by the contents exemplified above, and more various effects are included in the present specification.

Advantages and features of the present invention, and methods of achieving them, will become apparent with reference to the embodiments described below in detail. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms, and only the embodiments allow the disclosure of the present invention to be complete, and those of ordinary skill in the art to which the present invention pertains. It is provided to fully inform the person of the scope of the invention, and the present invention is only defined by the scope of the claims.

The terminology used herein is for the purpose of describing the embodiments and is not intended to limit the present invention. In this specification, 'and/or' includes each and every combination of one or more of the mentioned items. The singular also includes the plural, unless the phrase specifically states otherwise. As used herein, 'comprises' and/or 'comprising' does not exclude the presence or addition of one or more other elements in addition to the stated elements. Numerical ranges indicated using '-' or 'to' indicate a numerical range including the values listed before and after as the lower and upper limits, respectively, unless otherwise stated. 'About' or 'approximately' means a value or numerical range within 20% of the value or numerical range recited thereafter.

In addition, in describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the components from other components, and the essence, order, or order of the components are not limited by the terms.

Unless otherwise defined, all terms (including technical and scientific terms) used herein may be used with the meaning commonly understood by those of ordinary skill in the art to which the present invention belongs. In addition, terms defined in a commonly used dictionary are not to be interpreted ideally or excessively unless clearly defined in particular.

In the description of the embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function interferes with the understanding of the embodiment of the present invention, the detailed description thereof will be omitted.

Hereinafter, embodiments of the present invention will be described in detail.

Polyethylene terephthalate (PET) of the present invention may be prepared by polymerizing 100 parts by weight of terephthalic acid, 50-80 parts by weight of ethylene glycol, and 30-50 parts by weight of sulfonate, and the melting temperature (T _m ) may be 120-200 ℃, the number average molecular weight (M _n ) may be 15,000-21,000. The unit of the number average molecular weight (M _n ) may be g/mol. Preferably, the number average molecular weight may be 16,000-20,000, 17,000-19,000, 18,000-19,000 or 17,000-18,000, and the melting temperature is 130-190 °C, 140-180 °C, 150-170 °C, 150-160 °C or It may be 160-170 °C.

The sulfonate may be a compound represented by Formula 1 below. The sulfonate may be used in the form of a sulfonate metal salt in which a salt is formed with a metal such as Na, Ca, or K.

[Formula 1]

The sulfonate may be preferably a compound represented by the following Chemical Formulas 1-1 to 1-4, and more preferably a compound represented by the following Chemical Formula 1-1 or 1-2.

[Formula 1-1]

[Formula 1-2]

[Formula 1-3]

[Formula 1-4]

Instead of ethylene glycol (Ethylene Glycol), diethylene glycol (DEG), 1,4-butanediol (1,4-Butanediol), or 1,3-propanediol (1,3-Propanediol) may be used. At least one of isophthalic aicd, adipic acid, and sebacic acid may be used as a dicarbonic acid component instead of terephthalic acid.

Basalt fiber is a component that imparts tensile strength, tear strength, etc. to the polyester nonwoven fabric of the present invention and enhances eco-friendliness. Basalt fiber is obtained by pulverizing basalt into crushed basalt with a thickness of 20 mm or less, melting it at 1,440-1,480 ℃, drawing it while maintaining it at 1,380-1,480 ℃, cooling it slowly to 960-1,150 ℃ and applying a surface treatment agent. After drying, it can be manufactured by winding up. However, the present invention is not limited thereto.

The thickness of the basalt fiber may be 0.1-0.7 mm, preferably 0.2-0.5 mm. If the thickness is less than 0.1 mm, it may break easily and the strength may be weakened, and if it exceeds 0.7 mm, mixing with other components or uniform distribution may not be achieved.

The length of the basalt fiber may be 10-100 mm, preferably 30-80 mm. If the length is shorter than 10 mm, the strength may be weak, and if it is longer than 100 mm, mixing with other components or uniform distribution may not be achieved.

The phenolic stabilizer is a component capable of imparting heat deformation resistance to the polyester nonwoven fabric of the present invention, and may be represented by the following formula (2).

[Formula 2]

In Formula 2, R4 to R8 may each independently be C ₁ to C ₈ alkyl.

Preferably, the phenol-based stabilizer may be one of the following Chemical Formulas 2-1 to 2-3.

[Formula 2-1]

[Formula 2-2]

[Formula 2-3]

Polyurethane (polyurethane) may be prepared by polymerizing polycarbonate polyol (polycarbonate diol) and polyisocyanate (polyisocyanate). The number average molecular weight (M _n ) of the polyurethane may be 20,000-25,000. Preferably, the number average molecular weight may be 21,000-24,000 or 22,000-23,000.

Polycarbonate polyols are, for example, diols such as propylene glycol, butanediol-1,4 or hexanediol-1,6, diethylene glycol, triethylene glycol or tetraethylene glycol or two or more of these and diarylcarbo nates, for example diphenyl carbonate, or from mixtures of phosgene. The polycarbonate polyol may preferably be hexanediol-1,6. The polycarbonate polyol may have a melting temperature (T _m ) of 100-160 °C. Preferably, the melting temperature may be 110-150 °C, 120-140 °C, 120-130 °C or 130-140 °C.

The polyisocyanate is preferably an isocyanate having a molecular weight of 160 g/mol to 500 g/mol, for example an isomer of an aromatic polyisocyanate, such as diphenylmethanediisocyanate (MDI), such as 4,4'-diphenylmethanedi isocyanate (4,4'-MDI), 2,2'-diphenylmethanediisocyanate (2,2'-MDI), 2,4'-diphenylmethanediisocyanate (2,4'-MDI); isomers of phenylenediisocyanate, such as 1,3-phenylenediisocyanate, 1,4-phenylenediisocyanate; isomers of naphthalene-1,5-diisocyanate (NDI), toluenediisocyanate (TDI) such as 2,4-TDI and 2,6-TDI; m- and p-tetramethyl xylylene diisocyanate (TMXDI), m- and p-xylylene diisocyanate (XDI), 3,3'-dimethyldiphenyl-4,4'-diisocyanate (TODI), toluene di isocyanates, naphthalenes, di- and tetraalkyl diphenylmethane diisocyanates, 4,4'-dibenzyl diisocyanates, and combinations thereof can be selected. Preferably, the polyisocyanate may include 4,4'-diphenylmethanediisocyanate.

The phosphorus-based stabilizer is a component capable of imparting flame retardancy to the polyester nonwoven fabric of the present invention, and a compound represented by the following Chemical Formula 3 or 3-1 may be used.

[Formula 3]

[Formula 3-1]

The silane adhesive forms a nonwoven fabric by bonding and fixing a fiber web in which polyester fibers and polyurethane fibers are mixed, and a compound represented by the following Chemical Formula 4 may be used.

[Formula 4]

The silane adhesive may ^{be sprayed, for example, 0.01-1000 g per 1 m 2 of the} fibrous web, but is not limited thereto.

When the polyester fiber is reinforced by mixing the basalt fiber, the basalt fiber is modified by the silane adhesive and the adhesive strength is improved, so that the physical properties of the polyester nonwoven fabric can be improved.

The polyester nonwoven fabric of the present invention has excellent strength, heat deformation resistance, UV protection, flame retardancy, and the like, so it can be used as a textile material for functional clothing that can be used not only in daily clothing but also in various industrial fields.

According to another embodiment of the present invention, a polyamide mixed nonwoven fabric may be prepared by mixing a polyamide fiber with a polyester fiber and/or a polyurethane fiber.

Polyamide is specifically polyhexamethylenediamine adipamide (nylon 6,6), polyhexamethylenediamine sebacamide (nylon 6,10), polyhexamethylene lauroamide (nylon 6,12), polytetramethylene It may be selected from diamine adipamide (nylon 4,6), polycaprolactam (nylon 6), polylaurolactam (nylon 12), or a mixture thereof. Preferably, the polyamide may be polyhexamethylenediamine adipamide (nylon 6,6) and/or polylaurolactam (nylon 12) having a number average molecular weight of 13,000-20,000.

The number average molecular weight of the polyamide may preferably be 14,000-19,000, 15,000-18,000 or 16,000-17,000. When the number average molecular weight is lower than the numerical range, it is difficult to secure mechanical properties, and when the number average molecular weight exceeds the numerical range, fluidity and weather resistance may be deteriorated.

Graphene oxide is a material having excellent thermal conductivity, and is used to impart a heat dissipation function to the polyamide mixed nonwoven fabric of the present invention.

Graphene oxide is used as a graphene material that can maintain a stable yield and shape enough to be injected into the extruder. In an embodiment of the present invention, graphene oxide produced using solvothermal synthesis may be used. Specifically, first, sodium and ethanol at a molecular ratio of 1:1 were put into a reaction vessel, put into a furnace, and reacted at 220° C. for 72 hours. Then, it can be dried in a vacuum oven at 100 ° C. for 24 hours to obtain graphene oxide.

Since graphene oxide is difficult to mass-synthesize, has a high production cost, and the input into the extruder may be lowered by van der Waals force between particles, graphene oxide may be used in combination with graphite instead of alone.

The lyocell fiber may be used to increase the eco-friendliness of the polyamide mixed nonwoven fabric of the present invention and to improve tactile and physical properties. Lyocell fibers are a kind of cellulose fibers derived from wood pulp, and may be Lyocell short fibers formed by chopping lyocell yarns.

Lyocell fibers are known to be sensitive to fibrillation due to a high degree of orientation and a weak bond between fibrils. However, excessively lowering the degree of fibrillation may result in negligible change in quality versus cost.

The polyamide mixed nonwoven fabric of the present invention may have a fibrillation ratio Q of 10-30, and the fibrillation ratio Q may be defined by the following formula.

Q = 200 / tCSF200

tCSF200 is the time (in minutes) required for the CSF test to reach a CSF value of 200.

The fineness of each fiber constituting the polyester nonwoven fabric or polyamide mixed nonwoven fabric produced through the method of the present invention may be 1-50 de, preferably 5-40 de, more preferably 10-30 can be de. However, the present invention is not limited thereto.

The weight of the polyester nonwoven fabric or polyamide mixed nonwoven fabric produced through the method of the present invention may be 10-1,000 g/m 2 , preferably 50-500 g/m 2 . However, the present invention is not limited thereto.

The polyester nonwoven fabric produced through the method of the present invention may satisfy one or more of the following (1) to (6).

(1) Tensile strength: 21 kg/5 cm or more (MD) and 9.0 kg/5 cm or more (TD)

(2) Tear strength: more than 1.2 kg (MD) and more than 1.2 kg (TD)

(3) Elongation rate: 75% or more (MD) and 65% or more (TD)

(4) Recovery rate: 78% or more (MD) and 70% or more (TD)

(5) UV protection rate: 90% or more (UV-A) and 91% or more (UV-B)

(6) Flame retardant: V0 or higher

The polyamide mixed nonwoven fabric produced through the method of the present invention may satisfy one or more of the following (1) to (6).

(1) Tensile strength: 21 kg/5 cm or more (MD) and 9.5 kg/5 cm or more (TD)

(2) Tear strength: more than 1.2 kg (MD) and more than 1.2 kg (TD)

(3) Elongation rate: 75% or more (MD) and 65% or more (TD)

(4) Recovery rate: 78% or more (MD) and 65% or more (TD)

(5) UV protection rate: 90% or more (UV-A) and 92% or more (UV-B)

(6) Flame retardant: V0 or higher

Hereinafter, the present invention will be described through experimental examples, but it is obvious that the effects of the present invention are not limited by the following experimental examples.

Preparation Example 1: Preparation of polyester nonwoven fabric (1)

Terephthalic acid, ethylene glycol, and sulfonate were polymerized, and zinc oxide and basalt fibers were mixed at 180-200 ° C. in a screw extruder, and then a phenol-based stabilizer was further mixed in a section where the temperature was raised to 210-220 ° C. After the mixture was extruded, it was cooled and dried at 50° C. for 3 hours to prepare polyester pellets. As the sulfonate and phenol-based stabilizers, compounds of the following Chemical Formulas 1-2 and 2-1 were used, respectively.

[Formula 1-2]

[Formula 2-1]

A polycarbonate polyol having a melting temperature (T _m ) of 130-150° C. and polyisocyanate were polymerized. During polymerization, the molar ratio of the OH group of the polycarbonate polyol and the NCO group of the polyisocyanate was 1:1.2-1.3. Phosphorus-based stabilizer was mixed at 170-190 °C in a screw extruder. After extrusion, the polyurethane pellets were prepared by cooling and drying at 60° C. for 5 hours. As the phosphorus-based stabilizer, a compound of Formula 3 below was used.

[Formula 3]

Polyester pellets and polyurethane pellets were melted at 230-240° C. and then mixed and spun using a spinneret. The spun fibers were stretched through an ejector to form a mixed web while being laminated, and a nonwoven fabric was prepared by spraying a silane adhesive after cooling while being stretched and transported through a roll. As the silane adhesive, a compound represented by the following Chemical Formula 4 was used.

[Formula 4]

The polyester nonwoven fabric was prepared under various conditions as shown in Table 1 below.

Example One 2 3 4 5 6 7 parts by weight terephthalic acid 100 100 100 100 100 100 100 ethylene glycol 60 60 60 60 60 60 60 sulfonate 40 20 65 40 40 40 40 Zinc Oxide ^* 5 5 5 20 5 5 5 Basalt Fiber ^* 7 7 7 7 23 7 7 Phenolic stabilizer ^* 2 2 2 2 2 10 2 Polyurethane ^* 0.1 0.1 0.1 0.1 0.1 0.1 0.5 ^* Based on 100 parts by weight of PET

Experimental Example 1: Evaluation of properties and properties of polyester nonwoven fabric (1)

The physical properties and properties of the polyester nonwoven fabrics of Examples 1 to 7 were evaluated according to the following method.

- Number average molecular weight: analysis of molecular weight and molar mass distribution by gel permeation chromatography (GPC) under the same chromatographic conditions

- Tensile strength: Measure tensile strength according to KSK 0521 method

- Tear strength: Measure the tear strength according to KSK 0536 method

- Elasticity: After cutting the non-woven fabric to 1 inch wide and 15 cm long, fix one end and measure the length by hanging a 1 kg weight on the other end.

※ Elongation rate calculation formula = ((extended length) / (initial length)) x 100

- Recovery rate: After cutting the nonwoven fabric to 1 inch width and 15 cm length, fix one end and then hang a 1 kg weight on the other side to fix it, leave it for 10 minutes, and then remove the weight. After removing the weight, compare the increased length compared to the initial length.

※ Recovery rate calculation formula = (1-((Extended length - Initial length) / (Initial length)) x 100

- Thermal deformation resistance: Perform according to ISO 75 with a flexural stress of ^{1.8 N/mm 2 and compare the relative values}

- UV blocking rate: measure the blocking rate for UV-A (315-400 nm) and UV-B (290-315) using UV-VIS-NIR SPECTROPHOTOMER

- Flame retardancy: Measure flame retardancy using UL 94-AVH chamber by KS M 3305 method

The evaluation results are shown in Table 2 below.

Example One 2 3 4 5 6 7 Number average molecular weight (PET)
(g/mol) 18,000 14,000 20,000 18,000 18,000 18,000 18,000 Number average molecular weight (PU) (g/mol) 23,000 23,000 23,000 23,000 23,000 23,000 23,000 Tensile strength (MD)(kg/5cm) 22.5 20.5 20.4 21 22.4 19.6 19.1 Tensile strength (TD)(kg/5cm) 9.6 8.5 8.1 9.1 9.9 8.9 9.2 Tear strength (MD)(kg) 1.3 1.3 1.1 1.4 1.2 0.9 1.4 Tear strength (TD)(kg) 1.4 1.2 1.3 1.4 0.9 0.9 1.5 Stretch (MD) (%) 79 68 80 78 71 76 65 Stretch (TD) (%) 69 55 49 70 59 68 58 Recovery (MD) (%) 80 79 80 76 75 80 75 Recovery rate (TD) (%) 71 72 65 71 70 69 67 Heat deformation resistance (at 280 °C) ++ ++ ++ ++ ++ ++ + Heat deformation resistance (at 290 °C) ++ ++ + ++ ++ ++ + Ultraviolet (UV-A) blocking rate (%) 91.6 91.3 91.4 91.9 91.6 90.9 88.5 UV (UV-B) blocking rate (%) 92.7 92.8 93.0 92.8 92.1 91.8 87.6 flame retardant V0 V0 V0 V0 V0 V0 V0 Workability ◎ ◎ ○ ○ △ ◎ △ touch ◎ ○ ○ ○ △ ◎ ○ ◎: Good, ○: Normal, △: Bad

As shown in Table 2, when the amount of sulfonate used is small or large, the stretch rate, tear strength, or heat deformation resistance is weakened, and when the amount of zinc oxide is high, the decrease of other physical properties compared to the improvement of UV protection properties occurred. In addition, basalt fiber, phenolic stabilizer, or polyurethane has problems such as tear strength and elasticity when excessively used. Workability and feel are sensory evaluations confirming the compatibility of the fibrous web or the feel as a clothing use, and it can be seen that each component is deteriorated when an excess or trace amount is used.

Preparation Example 2: Preparation of polyester nonwoven fabric (2)

Various polyester nonwoven fabric comparative examples were prepared as follows and compared with the nonwoven fabric of the present invention.

Comparative Example 1: It was prepared in the same manner as in Preparation Example 1, except that basalt fibers were not used.

Comparative Example 2: It was prepared in the same manner as in Preparation Example 1 except that polyurethane was not used.

Comparative Example 3: It was prepared in the same manner as in Preparation Example 1, except that a method of bonding the nonwoven fabric only by thermocompression bonding without using an adhesive was used.

Comparative Example 4: It was prepared in the same manner as in Preparation Example 1, except that zinc oxide, basalt fiber, and a phenol-based stabilizer were mixed at 180-200 °C.

Comparative Example 5: Polyurethane polymerization was prepared in the same manner as in Preparation Example 1, except that the molar ratio of the OH group of the polycarbonate polyol and the NCO group of the polyisocyanate was about 1:0.9.

Experimental Example 2: Evaluation of properties and properties of polyester nonwoven fabric (2)

The physical properties and properties of the polyester nonwoven fabrics of Comparative Examples 1 to 5 were evaluated according to the same method as in Experimental Example 1, and the results are shown in Table 3 below.

Example 1 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Number average molecular weight (PET)
(g/mol) 18,000 18,000 18,000 18,000 18,000 18,000 Number average molecular weight (PU) (g/mol) 23,000 23,000 23,000 23,000 23,000 26,000 Tensile strength (MD)(kg/5cm) 22.5 18.5 19.0 20.1 18.9 20.4 Tensile strength (TD)(kg/5cm) 9.6 8.7 7.3 9.1 8.5 9.2 Tear strength (MD)(kg) 1.3 0.7 1.1 0.9 1.4 1.2 Tear strength (TD)(kg) 1.4 0.6 1.2 0.8 1.3 1.3 Stretch (MD) (%) 79 78 77 70 76 77 Stretch (TD) (%) 69 63 70 65 70 61 Recovery (MD) (%) 80 80 78 77 75 78 Recovery rate (TD) (%) 71 66 69 66 71 72 Heat deformation resistance (at 280 °C) ++ ++ ++ ++ + ++ Heat deformation resistance (at 290 °C) ++ ++ + ++ + ++ Ultraviolet (UV-A) blocking rate (%) 91.6 91.8 90.9 91.6 90.5 91.5 UV (UV-B) blocking rate (%) 92.7 92.0 91.1 92.5 91.2 91.7 flame retardant V0 V1 V2 V0 V0 V0 Workability / feel ◎ ◎ ○ ◎ △ ◎

As shown in Table 2 above, when basalt fiber or polyurethane was not used, overall physical properties such as strength, elasticity, flame retardancy, and heat deformation resistance were lowered. In the case of the thermocompression bonding method, a significant decrease in tear strength occurred, and it is interpreted that the use of a silane adhesive modifies the basalt fiber and improves the adhesion in the nonwoven fabric. When the phenolic stabilizer was mixed at the same time, heat deformation resistance and workability were lowered, which is thought to be because uniform mixing between the components was not easy.

Preparation Example 3: Preparation of polyamide mixed nonwoven fabric

Example 8: Polyhexamethylenediamine adipamide (nylon 6,6) and polylaurolactam (nylon 12), graphene oxide and lyocell fibers (degree of fibrillation Q about 22.0) in a screw extruder at 230-260 ° C. were mixed (weight ratio 100:4:1:20), extruded, and cooled and dried at 70° C. for 4 hours to prepare polyamide pellets. A nonwoven fabric was prepared in the same manner as in Example 1, except that the polyamide pellets were melted and then spun and further mixed with the fibrous web.

Example 9: A nonwoven fabric was prepared in the same manner as in Example 8, except that polyurethane fibers were not used.

Example 10: A nonwoven fabric was prepared in the same manner as in Example 8, except that lyocell fibers were not used.

Experimental Example 3: Evaluation of properties and properties of polyester nonwoven fabric (3)

Physical properties and properties of the polyamide mixed nonwoven fabrics of Examples 8 to 10 were evaluated in the same manner as in Experimental Example 1. Thermal conductivity was evaluated as follows, and the results are shown in Table 4 below.

- Thermal conductivity In(In-Plane) / Thermal conductivity (Through-Plane): Measured according to ASTM E1461 (Laser flash method)

Example 8 Example 9 Example 10 Tensile strength (MD)
(kg/5cm) 21.8 21.3 19.8 Tensile strength (TD)(kg/5cm) 10.7 8.8 8.5 Tear strength (MD)(kg) 1.4 1.1 1.2 Tear strength (TD)(kg) 1.4 1.1 1.0 Stretch (MD) (%) 81 80 75 Stretch (TD) (%) 68 70 70 Recovery (MD) (%) 82 75 81 Recovery rate (TD) (%) 67 72 65 Heat deformation resistance (at 280 °C) ++ ++ ++ Heat deformation resistance (at 290 °C) ++ + ++ Ultraviolet (UV-A) blocking rate (%) 91.2 92.1 91.5 UV (UV-B) blocking rate (%) 94.5 93.4 93.0 flame retardant V0 V2 V0 Workability / feel ◎ ◎ ◎ Tensile strength (MD)(kg/5cm) ◎ ○ △ thermal conductivity 2.9 3.1 3.2

As shown in Table 4, in the case of the nonwoven fabric mixed with polyester, polyurethane, and polyamide fibers, overall physical properties such as strength and elasticity and touch were excellent, and in the case of lyocell fibers, the strength and touch were greatly affected. . In the case of thermal conductivity, although each component was different, there was no significant difference. In the above, the embodiments of the present invention have been mainly described, but these are merely examples and do not limit the present invention, and it is common knowledge in the field to which the present invention pertains. Those with will know that various modifications and applications not exemplified above are possible without departing from the essential characteristics of the embodiments of the present invention. For example, each component specifically shown in the embodiment of the present invention may be implemented by modification. And differences related to such modifications and applications should be construed as being included in the scope of the present invention defined in the appended claims.

Claims (5)

delete A polyester fiber and a polyurethane fiber in a mass ratio of 1:0.05-0.2,
The polyester fiber,
_{A number average molecular weight (M n} ) prepared by polymerizing 100 parts by weight of terephthalic acid, 50-80 parts by weight of ethylene glycol, and 30-50 parts by weight of a sulfonate represented by the following Chemical Formula 1 (M n ) 15,000- 100 parts by weight of 21,000 polyethylene terephthalate (PET);
[Formula 1]

(In Formula 1, R is one or more independently selected C ₁ to C ₁₂ alkyl, alkenyl, or ester)
1-10 parts by weight of zinc oxide (ZnO);
5-15 parts by weight of basalt fiber of 0.1-0.7 mm in thickness and 10-100 mm in length; and
1-5 parts by weight of a phenol-based stabilizer represented by one of the following Chemical Formulas 2-1 to 2-3,
[Formula 2-1]

[Formula 2-2]

[Formula 2-3]

The polyurethane fiber,
100 parts by weight of polyurethane having _{a number average molecular weight (M n} ) of 20,000-25,000 prepared by polymerizing polycarbonate diol and polyisocyanate having a melting temperature (T _{m ) of 100-160 ° C.} ; and
1-5 parts by weight of a phosphorus-based stabilizer represented by the following formula (3)
[Formula 3]

Polyester nonwoven fabric for functional clothing textiles. (a-1) 100 parts by weight of terephthalic acid, 50-80 parts by weight of ethylene glycol, and 30-50 parts by weight of a sulfonate represented by the following Chemical Formula 1 are polymerized to have a number average molecular weight (M _n ) preparing a polyethylene terephthalate (PET) composition of 15,000-21,000;
[Formula 1]

(In Formula 1, R is one or more independently selected C ₁ to C ₁₂ alkyl, alkenyl, or ester)
(a-2) After mixing 1-10 parts by weight of zinc oxide (ZnO) and 5-15 parts by weight of basalt fiber with 100 parts by weight of the PET composition at 180-200°C, the following Chemical Formulas 2-1 to Further mixing 1-5 parts by weight of a phenol-based stabilizer represented by one of 2-3;
[Formula 2-1]

[Formula 2-2]

[Formula 2-3]

(a-3) preparing polyester pellets by extruding the mixture and then cooling and drying the mixture at 50-70° C. for 3-5 hours;
(b-1) Polyurethane having a number average molecular weight (M _n ) of 20,000-25,000 by polymerizing polycarbonate diol and polyisocyanate having a melting temperature (T _{m ) of 100-160 ° C.} Preparing a composition, wherein the molar ratio of the OH group of the polycarbonate polyol and the NCO group of the polyisocyanate is 1:1-1.5;
(b-2) mixing 1-5 parts by weight of a phosphorus-based stabilizer represented by the following Chemical Formula 3 with 100 parts by weight of the polyurethane composition at 170-190°C;
[Formula 3]

(b-3) preparing polyurethane pellets by extruding the mixture and then cooling and drying the mixture at 50-65° C. for 3-6 hours;
(c) melt the polyester pellets and the polyurethane pellets at 230-240 ° C. and then mix spinning to form a fiber web, wherein the mass ratio of the polyester fibers and the polyurethane fibers contained in the fiber web is 1:0.05-0.2 phosphorus step; and
(d) spraying a silane adhesive represented by the following Chemical Formula 4 on the fiber web to form a nonwoven fabric
[Formula 4]

A method for producing a polyester nonwoven fabric for functional clothing fibers. 4. The method of claim 3,
The sulfonate is represented by the following Chemical Formula 1-1 or 1-2
A method for producing a polyester nonwoven fabric for functional clothing fibers.
[Formula 1-1]

[Formula 1-2]

5. The method of claim 4,
The melting temperature (T _m ) of the polymerized PET is 120-200 ℃
A method for producing a polyester nonwoven fabric for functional clothing fibers.