KR20190063779A - Polyolefin resin composition for non-woven fabric and manufactured by using the same - Google Patents

Abstract

In the case of a soft non-woven fabric material according to the related art, there is a problem in that the non-woven fabric material has been produced by using a composite spinning method or has been produced by modifying characteristics of the non-woven fabric material, but spinning workability is deteriorated, process costs are increased, or a large amount of fume is generated during spinning. Thus, in the present invention, disclosed is a polyolefin-based resin composition having excellent flexibility and low-temperature thermal adhesion by formulating a specific polypropylene resin and polyethylene resin and additives in a specific content. Provided is a polyolefin-based resin composition for a non-woven fabric, comprising: (a) 60-98 wt% of a first polypropylene-based resin; (b) 1-20 wt% of a low-crystalline polypropylene-based resin as a second polypropylene-based resin; (c) 1-30 wt% of a polyethylene-based resin; (d) 0.001-1 parts by weight of a β-crystalline nucleating agent with respect to 100 parts by weight of the total (a) to (c) components; and (e) 0.001-1 parts by weight of a slip agent with respect to 100 parts by weight of the total (a) to (c) components.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polyolefin resin composition for a nonwoven fabric, and a nonwoven fabric prepared using the same.

More particularly, the present invention relates to a polyolefin-based resin composition for nonwoven fabric having excellent flexibility and low-temperature thermal adhesion property, and a nonwoven fabric produced using the same.

In recent disposable sanitary nonwoven fabrics market including infant diapers and sanitary napkins, there has been a growing interest in nonwoven fabrics having a soft feel capable of satisfying consumers' emotions. Accordingly, A nonwoven fabric manufacturing technology and material technology that can be implemented are required.

Korean Patent Registration No. 1302804 discloses a method of producing a soft nonwoven fabric by using a soft tactile feeling of polyethylene by co-spinning polypropylene and a high density polyethylene to a core portion and an extrusion process for melting a polypropylene and a polyethylene And composite spinning dies and nozzles are indispensable, which necessitates an expensive complex spinning process. In addition, the nonwoven fabric strength may be lowered due to polyethylene, and the interface between polypropylene and polyethylene conjugated spinning fibers is easily separated.

Korean Patent Laid-Open Publication No. 2011-0027973 discloses a method of improving the nonwoven fabric material by blending an expensive elastomeric random copolymer and an amide type slip agent in homopolypropylene, but the cost increase due to the elastomeric random copolymer There is a problem that radioactivity deteriorates as well as a problem.

Korean Patent Publication No. 1713498 discloses a method of blending a random polypropylene copolymer or a random polypropylene terpolymer containing ethylene or butene-1 with homopolypropylene and a method of blending a random polypropylene terpolymer with an amorphous slip agent, Although a resin composition having soft properties has been disclosed, there is a demand for a resin composition having more excellent softness.

Korean Patent Laid-Open Publication No. 2017-065588 discloses a method of securing radioactivity by blending a polyethylene polymer and an ethylene polymer wax to a polypropylene polymer and securing radioactivity due to the effect that the polymer wax improves the dispersibility of polypropylene and polyethylene , The amount of fume generated by the polymer wax during spinning is high, which is an undesirable problem in spunbond spinning.

Conventionally, soft nonwoven fabrics have been produced through the use of a complex spinning method or through the characteristic modification of nonwoven fabric materials. However, there are problems in that spinning workability is lowered, process costs are increased, and fumes are generated during spinning. A polyolefin resin composition having excellent flexibility and low temperature thermal adhesiveness by providing a polypropylene resin, a polyethylene resin and an additive in a specific amount, and a nonwoven fabric using the same.

In order to solve the above problems, the present invention provides a polypropylene resin composition comprising (a) 60 to 98% by weight of a first polypropylene resin; (b) 1 to 20% by weight of a low-crystalline polypropylene resin as the second polypropylene resin; (c) 1 to 30% by weight of a polyethylene resin; (d) 0.001 to 1 part by weight of? crystal nucleating agent per 100 parts by weight of the total of components (a) to (c); And (e) 0.001 to 1 part by weight of a slip agent based on 100 parts by weight of the total of the components (a) to (c).

The first polypropylene resin (a) is a propylene homopolymer or a propylene copolymer obtained by copolymerizing propylene and an α-olefin having 2 to 20 carbon atoms in an amount of 0.1 to 20 mol%, and has a molecular weight distribution (Mw / Mn) of 5 Based on the total weight of the polyolefin-based resin composition for a nonwoven fabric.

The second polypropylene resin (b) is a propylene homopolymer or a propylene copolymer obtained by copolymerizing propylene with an α-olefin having 2 to 20 carbon atoms in an amount of 0.1 to 5 mol% Wherein the polyolefin resin composition for a nonwoven fabric is characterized by having a stereoregularity (isotacticity, Pentad II, mmmm) of 20 to 70% and a molecular weight distribution (Mw / Mn) of 5 or less.

The polyolefin resin (c) has a density of 0.920 to 0.980 g / cm 3.

The (d) β-crystal nucleating agent may be an amide compound, an alkali metal salt or alkaline earth metal salt of a carboxylic acid, an aromatic sulfonic acid compound, a diester or triester of a dibasic or tribasic carboxylic acid, a tetraoxaspiro compound, Wherein the polyolefin-based resin composition is at least one selected from the group consisting of an acid anhydride, a carboxylic acid derivative, a phthalocyanine-based pigment, a quinacridone-based pigment, and an alkaline earth metal salt of an acid imide compound.

The slip agent (e) is at least one selected from the group consisting of erucamide, oleamide, stearamide, butenamide, ethylene bisstilamide and ethylene bisesteramide. The polyolefin resin for nonwoven fabric Lt; / RTI >

(F) 0.001 to 1 part by weight per 100 parts by weight of the total of (a) to (c) components of a peroxide type or a nitroxide-based molecular weight modifier. .

Wherein the resin composition has a flexural modulus in accordance with ASTM D790 of 12,000 kg / cm 2 or less, a friction coefficient according to ASTM D1894 of 1 or less, and a heat bonding temperature according to the following measurement method of 150 ° C or less To provide a resin composition.

[Measurement method of heat bonding temperature]

Two sheets of the film were thermally adhered (heat bonding pressure: 2 kg / cm 2, heat bonding time: 2 sec), and both ends of the same point of the film were held at a force of 1000 gf / The minimum temperature at which the film is not peeled off is set as the heat bonding temperature.

In order to solve the above-mentioned problems, the present invention provides a nonwoven fabric produced using the resin composition.

According to the present invention, by mixing a first polypropylene type resin, a low-crystalline polypropylene type resin and a polyethylene type resin as the second polypropylene type resin and inducing a? Crystal structure, they have excellent flexibility properties and low temperature thermal adhesiveness A polyolefin-based resin composition for a nonwoven fabric which is excellent in spinning workability in a fibrous form and has a good tactile sensation when the nonwoven fabric is made into a nonwoven fabric, and a nonwoven fabric produced using the same.

Hereinafter, the present invention will be described in detail with reference to preferred embodiments. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately The present invention should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention. Accordingly, it is to be understood that the constituent features of the embodiments described herein are merely the most preferred embodiments of the present invention, and are not intended to represent all of the inventive concepts of the present invention, so that various equivalents, And the like.

The inventors of the present invention have developed a material that can solve the problems of the conventional soft nonwoven fabrics due to poor processability such as lowered spinning workability and fume generation during spinning, The present inventors have found that the specific polypropylene resin and the polyethylene resin and the additive can be prepared in a specific amount so as to have excellent flexibility and low temperature thermal adhesion as well as to solve problems in the process, .

Accordingly, the present invention provides a polypropylene resin composition comprising: (a) 60 to 98% by weight of a first polypropylene resin; (b) 1 to 20% by weight of a low-crystalline polypropylene resin as the second polypropylene resin; (c) 1 to 30% by weight of a polyethylene resin; (d) 0.001 to 1 part by weight of? crystal nucleating agent per 100 parts by weight of the total of components (a) to (c); And (e) 0.001 to 1 part by weight of a slip agent based on 100 parts by weight of the total of the components (a) to (c). Hereinafter, each component constituting the present invention will be described in detail.

(a) a first polypropylene resin

In the present invention, the first polypropylene resin may be a propylene homopolymer or a propylene-alpha-olefin copolymer as the base resin of the polypropylene resin composition for a nonwoven fabric of the present invention.

The propylene-alpha-olefin copolymer may be a propylene copolymer with propylene and an alpha-olefin copolymerized with 2 to 20 carbon atoms, and examples of the alpha-olefin include ethylene, 1-butene, 1-pentene, 1-octene, and the like.

As the first polypropylene resin, propylene homopolymers are preferable when the strength and heat resistance of fibers or nonwoven fabrics are emphasized. When the flexibility of the nonwoven fabric is more important, the total content of alpha-olefins is 0.1 to 20 mol% By mole, preferably 1 to 15% by mole. If the alpha-olefin content of the propylene copolymer is more than 20 mol%, the cooling rate of the fiber during spinning may be lowered, resulting in a filament-to-filament conflict or a higher possibility of non-woven web formation. Considering this point further, the alpha-olefin content in the propylene copolymer is most preferably 3 to 8 mol%.

In addition, the first polypropylene resin in the present invention has a melt index (230 ° C, 2.16 kg load) of 1 to 100 g / 10 min and a molecular weight distribution (Mw / Mn ) Of 1 to 5, preferably a melt index of 5 to 30 g / 10 min and a molecular weight distribution of 1.5 to 3.5, and a weight average molecular weight of 100,000 to 500,000 g / mol. When the molecular weight distribution is more than 5, swelling of the melted polymer occurs at a die discharge port during fiber spinning, and it may be difficult to ensure uniform spinning workability.

The first polypropylene resin may include 60 to 98% by weight, preferably 80 to 90% by weight, of the total resin components excluding the additives described later.

(b) a second polypropylene resin

In the present invention, the second polypropylene resin is a low-crystalline polypropylene resin having excellent compatibility with the first polypropylene resin (a) as the base resin, inducing a slow crystallization rate, And is a low crystalline polypropylene type resin having a relatively low stereoregularity in the methyl group arrangement of the propylene polymer.

In the present invention, such a second polypropylene resin is produced with a metallocene catalyst, and the stereoregularity (isotacticity, Pentad I.I, mmmm) is in the range of 20 to 70%. A typical isotactic polypropylene resin has a value of 95% or more [mmmm], and the nonwoven fabric has a high strength due to a high degree of crystallinity, but has a problem of poor flexibility. In general, atactic polypropylene has a value of less than 10% [mmmm], has very low crystallinity, has a low mechanical property, is easily deformable, and is difficult to use for nonwoven fabrics. That is, when the value of [mmmm] of the low crystalline polypropylene is less than 20%, the tackiness is increased and the soft touch of the nonwoven fabric is difficult to impart. When the value of [mmmm] is more than 70%, it is difficult to impart flexibility in terms of the properties of the nonwoven fabric.

The second polypropylene resin may contain 1 to 20% by weight, preferably 2 to 10% by weight, of the total resin components except for the additive to be described later for improving workability, stretchability and throwing power during fiber spinning . If the content of the low crystalline polypropylene resin is less than 1% by weight, it is difficult to secure desired physical properties and radioactivity of the nonwoven fabric. If the content of the low crystalline polypropylene resin is more than 20% by weight, The possibility increases.

In the present invention, the second polypropylene resin may have a molecular weight distribution (Mw / Mn) of 1 to 5 so as to be more suitable for improving softness and radiation workability when applied to nonwoven fabrics. When the molecular weight distribution is more than 5, swelling of the melted polymer occurs at a die discharge port during fiber spinning, and it may be difficult to ensure uniform spinning workability.

(c) Polyethylene resin

In the present invention, the polyethylene-based resin is an ethylene homopolymer or a copolymer of ethylene and a small amount of other comonomers of 10 mol% or less in order to maximize softness without deteriorating spinning workability and low-temperature thermal adhesion. The comonomer may preferably be 1-butene or 1-octene.

The comonomer may serve to control the density of the polyethylene-based resin. In the present invention, the density of the polyethylene-based resin may be 0.920 to 0.980 g / cm 3. When a polyethylene resin having a density in the above range is used, deterioration of radioactivity is suppressed and the strength of the resultant nonwoven fabric is excellent. Considering this point, the density of the polyethylene-based resin is preferably 0.940 to 0.980 g / cm3, more preferably 0.950 to 0.970 g / cm3.

(d) β crystal nucleating agent

In the present invention, the 棺 crystal nucleating agent is used to induce the 棺 crystal structure of the polyolefin resin, and is not particularly limited as long as it can induce β crystallization of the polyolefin resin. For example, an amide compound, an alkali metal salt of a carboxylic acid, Alkaline earth metal salts, aromatic sulfonic acid compounds, diesters or triesters of dibasic or tribasic carboxylic acids, tetraoxaspiro compounds, imidocarboxylic acid derivatives, phthalocyanine pigments, quinacridone pigments, Metal salts and the like can be used.

Specifically, examples of the amide compound include N, N'-diphenylhexanediamide, N, N'-dicyclohexylterephthalamide, N, N'-dicyclohexyl-2,6-naphthalenedicarboxamide, N, N'-dibenzoyl-1,4-diaminocyclohexane, N, N'-dicyclohexanecarbonyl-p-phenylenediamine, N, N-phenyl-5- (benzoylamino) pentane, N, N'-dicyclohexanecarbonyl-1,4-diaminocyclohexane, N-cyclohexyl- Amide and the like can be used. As the alkali metal salt or alkaline earth metal salt of the carboxylic acid, sodium benzoate, magnesium benzoate, potassium 1,2-hydroxystearate, magnesium succinate, magnesium phthalate and the like can be used, As the compound, sodium benzenesulfonate, sodium naphthalenesulfonate and the like can be used. As the phthalocyanine-based pigment, phthalo Cyanine blue and the like can be used. As the quinacridone pigment, quinacridone and the like can be used. As the alkaline earth metal salt of the acid imide compound, calcium salt of phthaloylglycine, hexahydrophthaloylglycine calcium Salt, naphthoylglycine calcium salt, N-phthaloylalanine calcium salt, N-4-methyl phthaloylglycine calcium salt and the like can be used.

The β-crystal nucleating agent is contained in an amount of 0.001 to 1 part by weight, preferably 0.01 to 0.1 part by weight based on 100 parts by weight of the total of the components (a) to (c). If the amount of the β crystal nucleating agent is less than 0.001 part by weight, sufficient β crystal may not be generated. If the amount of the β crystal nucleating agent is more than 1 part by weight, the amount of fume generated may be increased by β nucleating agent have.

In the present invention, when the? -Crystal is induced in the polyolefin resin composition, the bending elastic modulus is reduced by about 10%, and thus the flexibility of the nonwoven fabric can be further improved and the elongation can be remarkably increased.

(e) Slip agent

In the present invention, the slip agent is used to improve the soft feel of the surface of the nonwoven fabric by decreasing the friction coefficient when the polyolefin resin composition is applied to the nonwoven fabric application, and an amide slip agent can be preferably used.

The amide slip agent can be preferably used as a compound having a high melting point of amide series synthesized from a fatty acid and having a hydroxyl group substituted with an amino structure to have a neutral structure.

The slip agent may be, for example, erucamide, oleamide, stearamide, telluamide, ethylene bis-stearamide, ethylene bis-amide, etc. The beads may have an average particle diameter of 1 to 2 mm, 1.5 mm, and the average particle size of the powder is 0.1 to 0.9 mm, preferably 0.2 to 0.6 mm.

The slip agent may be included in an amount of 0.001 to 1 part by weight, preferably 0.05 to 0.2 part by weight based on 100 parts by weight of the components (a) to (c). When the content of the slip agent is less than 0.001 part by weight, the slip property is difficult to develop and the degree of softness improvement of the nonwoven fabric may be unsatisfactory. When the amount of the slip agent is more than 1 part by weight, the softness of the nonwoven fabric may be reduced due to excessive slip agent , And may cause an increase in the amount of fume generation.

(f) Molecular weight regulator

In the present invention, a peroxide-type or a nitroxide-based molecular weight modifier may be further included as a molecular weight modifier for further improving workability and throwing power during spinning of a fiber using the polyolefin resin composition.

The molecular weight modifier may be included in an amount of 0.001 to 1 part by weight, preferably 0.01 to 0.1 part by weight based on 100 parts by weight of the components (a) to (c). If the content of the molecular weight modifier is less than 0.001 part by weight, it may be difficult to secure sufficient workability and pluckability. If the content is more than 1 part by weight, gelation due to cross-linking of the polyethylene resin (c) The workability may be deteriorated.

It is needless to say that the polyolefin resin composition for a nonwoven fabric of the present invention may further contain various functional additives in addition to the above components, depending on the intention of the operator, the end use of the final product, and the like. Examples of the functional additives include antioxidants, neutralizing agents, organic peroxides, flame retardants, colorants, lubricants, release agents, pigments, etc., and they may be used singly or in combination of two or more in an amount of 0.001 to 1 part by weight per 100 parts by weight of the resin composition of the present invention Lt; / RTI >

The preparation of the resin composition using the above components in the present invention can be carried out according to a conventional method known in the art. For example, the above components are put into a Henschel mixer in the required amount, and the Henschel mixer is mixed at 300 to 700 rpm for 0.5 to 3 minutes, 1,200 to 1,800 rpm for 0.1 to 2 minutes, and further mixed at 300 to 700 rpm. And then the mixture is thoroughly mixed for 2 to 8 minutes in total, and then the mixture is extruded through a single-screw extruder, multi-screw extruder, kneader or Benbury mixer having an L / D of 25 or more at a processing temperature of 160 to 230 ° C, preferably 180 to 220 ° C To prepare pellets.

Meanwhile, the nonwoven fabric using the polypropylene resin composition for a nonwoven fabric according to the present invention can be produced through a conventional staple fiber process and a spunbond process. For example, the polypropylene resin composition is melt-spun and stretched to obtain filament fibers , Laminating the web to a web, and thermally bonding or needle punching the laminated filament web.

INDUSTRIAL APPLICABILITY The polyolefin-based resin composition for a nonwoven fabric according to the present invention has excellent flexibility properties and low-temperature thermal adhesiveness, and is excellent in spinning workability in a fibrous form. When the nonwoven fabric is made into a nonwoven fabric, the nonwoven fabric can have excellent tactile sensation. Specifically, the polyolefin resin composition for a nonwoven fabric according to the present invention may have a flexural modulus according to ASTM D790 of 12,000 kg / cm 2 or less, preferably 11,000 kg / cm 2 or less, a friction coefficient according to ASTM D1894 of 1 or less, May be 0.5 or less, and the thermal bonding temperature according to the following measurement method may be 150 占 폚 or lower, preferably 140 占 폚 or lower.

[Measurement method of heat bonding temperature]

The pellet-shaped resin composition was used to form a 30 탆 film in a CPP molding machine. Two sheets of the film were thermally adhered (heat bonding pressure 2 kg / cm 2, heat bonding time 2 sec) and both ends of the same point of the film were held at a force of 1000 gf / The minimum temperature at which the film is not peeled off during the experiment is the heat bonding temperature.

Hereinafter, the present invention will be described in detail with reference to examples.

Example 1

(a) First polypropylene resin (propylene-ethylene random copolymer, ethylene 5 mol%, melt index (230 캜, 2.16 kg load) 28 g / 10 min, molecular weight distribution (Mw / Mn) 3.5, Lotte Chemical) 85 (40 to 50% of [mmmm] value, a melt index (230 DEG C, load of 2.16 kg), and the like), and (b) a commercial low-crystalline polypropylene resin prepared by using a metallocene catalyst as the second polypropylene- (Ethylene / 1-butene (3 mol%) copolymer having a density of 0.960 g / cm 3 and a melt index of 190 占 폚 and a molecular weight distribution (Mw / Mn) of 2.5 g / (MPM 2000, manufactured by Dainippon Ink and Chemicals, Inc.) per 100 parts by weight of the total of the components (a) to (c) (F) 0.04 parts by weight of a molecular weight modifier (Trigonox 101, AkzoNobel) were fed into a Henschel mixer, and the mixture was stirred at 500 rpm for 1 minute at 1,500 rpm For 0.5 min. And then the mixture was thoroughly mixed for 3 to 5 minutes. The polyolefin resin composition was pelletized using a 40 mm single screw extruder having an L / D of 35 at a processing temperature of 180 to 220 ° C . Thereafter, the pellet-shaped resin composition thus prepared was molded at 190-240 ° C using an injection molding machine to prepare a physical property specimen.

Example 2

In the same manner as in Example 1 except that (a) 75 parts by weight of the first polypropylene resin and (c) 20 parts by weight of the polyethylene resin were used in Example 1, the resin composition and the physical property specimen were prepared Respectively.

Example 3

The procedure of Example 1 was repeated except that (a) 80 parts by weight of the first polypropylene resin and (b) 10 parts by weight of the second polypropylene resin were used. Specimens were prepared.

Example 4

A resin composition and a physical property specimen were prepared in the same manner as in Example 1, except that (a) the first polypropylene resin having a molecular weight distribution (Mw / Mn) of 6 was used in Example 1.

Example 5

A resin composition and a physical property specimen were prepared in the same manner as in Example 1, except that the polyethylene resin (c) having a density of 0.920 g / cm 3 was used as the comonomer in Example 1.

Comparative Example 1

In Example 1, (b) without using a second polypropylene resin, (a) A resin composition and a physical property specimen were prepared in the same manner as in Example 1 except that 90 parts by weight of a polypropylene resin and (c) 10 parts by weight of a polyethylene resin were used.

Comparative Example 2

Except that (a) 90 parts by weight of the first polypropylene-based resin and (b) 10 parts by weight of the second polypropylene-based resin were used instead of the polyethylene-based resin (c) A resin composition and a physical property specimen were prepared in the same manner as in Example 1.

Comparative Example 3

A resin composition and a physical property specimen were prepared in the same manner as in Example 1, except that (d) β crystal nucleating agent was not used in Example 1.

Comparative Example 4

A resin composition and a physical property specimen were prepared in the same manner as in Example 1, except that (e) the slip agent was not used in Example 1.

Test Example

The melt index of the resin compositions prepared according to the above Examples and Comparative Examples and the physical properties of the specimens were measured according to the following methods, and the results are shown in Table 1 below.

[Assessment Methods]

(1) Flexural modulus: measured according to ASTM D790.

(2) Coefficient of friction: Measured by a film according to ASTM D1894.

(3) Radioactivity and workability: S, A, B, C, and D were prepared by comparing the single-filament yarn frequency and yarn vibration occurring at the time of 2 hours of operation at 5Denier and a spinning speed of 2,000 m / Respectively.

(4) Thermal Adhesion Temperature: Using a composition in the form of a pellet, a 30 탆 film was formed in a CPP molding machine to thermally adhere two films in the MD direction, left at room temperature for 2 hours or longer, and subjected to a tensile tester at a test speed of 200 mm / The temperature was measured to be 1,000 g or more. The heat bonding pressure was 2 kg / cm 2 and the heat bonding time was 2 seconds.

(5) Tactile feeling: The tactile sensation of a fibrous yarn wound on a bobbin was evaluated in the order of S, A, B, C and D by relatively comparing the feels of 20 arbitrary evaluators.

According to the present invention, when a polyolefin-based resin composition prepared by combining specific additives with a first polypropylene resin, a second polypropylene resin and a polyethylene resin having specific compositions according to the present invention is used, It is possible to confirm that the nonwoven fabric has thermal adhesiveness, is excellent in spinning workability in a fibrous form, and has excellent tactile feel when the nonwoven fabric is made into a nonwoven fabric.

However, when the content of the polyethylene-based resin (c) is relatively excessive (Example 2), the radioactivity and workability are somewhat lowered. (B) When the content of the second polypropylene-based resin is relatively excessive (A) the physical properties related to the molecular weight distribution of the first polypropylene resin are out of a certain range (Example 4), (c) the polyethylene resin (Example 5), the radioactivity and workability are somewhat lowered. Therefore, the composition and the specific and physical properties of each component exist to satisfy both the physical properties and the workability desired in the present invention .

On the other hand, when the second polypropylene resin (b) was not used (Comparative Example 1), the radioactivity and workability were significantly lowered, and (c) the polyethylene terephthalate resin was not used (Comparative Example 2) . It is also possible to deduce that the flexural modulus of the nonwoven fabric is lowered when (d) the β-crystal nucleating agent is not used (Comparative Example 3), and the flexural modulus of the nonwoven fabric is lowered. (E) And the tactile sensation is lowered.

While the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, Such modifications and changes are to be considered as falling within the scope of the following claims.

Claims (9)

(a) 60 to 98% by weight of a first polypropylene resin;
(b) 1 to 20% by weight of a low-crystalline polypropylene resin as the second polypropylene resin;
(c) 1 to 30% by weight of a polyethylene resin;
(d) 0.001 to 1 part by weight of? crystal nucleating agent per 100 parts by weight of the total of components (a) to (c); And
(e) 0.001 to 1 part by weight of a slip agent based on 100 parts by weight of the components (a) to (c)
Based resin composition for a nonwoven fabric. The method according to claim 1,
The first polypropylene resin (a) is a propylene homopolymer or a propylene copolymer obtained by copolymerizing propylene with an α-olefin having 2 to 20 carbon atoms in an amount of 0.1 to 20 mol%, and has a molecular weight distribution (Mw / Mn) Wherein the polyolefin-based resin composition is a polyolefin-based resin composition for a nonwoven fabric. The method according to claim 1,
The second polypropylene resin (b) is a propylene homopolymer or a propylene copolymer obtained by copolymerizing propylene with an α-olefin having 2 to 20 carbon atoms in an amount of 0.1 to 5 mol% The polyolefin-based resin composition for a nonwoven fabric according to any one of claims 1 to 3, wherein the isotacticity (Pentad II, mmmm) is 20 to 70% and the molecular weight distribution (Mw / Mn) The method according to claim 1,
The polyolefin-based resin composition for a nonwoven fabric according to any one of (1) to (3), wherein the polyethylene-based resin (c) has a density of 0.920 to 0.980 g / cm3. The method according to claim 1,
The (d) β-crystal nucleating agent may be selected from amide-based compounds, alkali metal salts or alkaline earth metal salts of carboxylic acids, aromatic sulfonic acid compounds, diesters or triesters of dibasic or tribasic carboxylic acids, tetraoxaspiro compounds, Wherein the polyolefin-based resin composition is at least one selected from the group consisting of an acid derivative, a phthalocyanine-based pigment, a quinacridone-based pigment, and an alkaline earth metal salt of an acid imide compound. The method according to claim 1,
Wherein the slip agent (e) is at least one selected from the group consisting of erucamide, oleamide, stearamide, bainamide, ethylene bis (stearamide) and ethylene bis . The method according to claim 1,
(f) 0.001 to 1 part by weight per 100 parts by weight of the total of (a) to (c) components of a peroxide-based or nitroxide-based molecular weight modifier. The method according to claim 1,
Wherein the resin composition has a flexural modulus according to ASTM D790 of 12,000 kg / cm2 or less, a friction coefficient according to ASTM D1894 of 1 or less, and a heat bonding temperature according to the following measurement method is 150 DEG C or less Composition:
[Measurement method of heat bonding temperature]
Two sheets of the film were thermally adhered (heat bonding pressure: 2 kg / cm 2, heat bonding time: 2 sec), and both ends of the same point of the film were held at a force of 1000 gf / The minimum temperature at which the film is not peeled off is set as the heat bonding temperature. A nonwoven fabric produced by using the resin composition of any one of claims 1 to 8.