KR101350817B1 - Melt blown nonwoven fabric having high bulkiness and manufacturing method thereof - Google Patents

Abstract

The present invention comprises a polyester latent crimping yarn for imparting high mechanical strength of the obtained nonwoven fabric and vinyl meltblown fibers having at least two types of diameters to maintain high shape retention performance of the nonwoven fabric itself. The present invention relates to a melt blown nonwoven fabric having a high bulky property, which can easily facilitate and exhibit high filtration performance. The melt blown yarn includes 20 to 30% by weight of crimped sand and a melt blown sand as a residual amount. It is characterized by comprising a melt blown yarn having a different diameter.

Description

Melt blown nonwoven fabric having high bulkiness and its manufacturing method {Melt blown nonwoven fabric having high bulkiness and manufacturing method

The present invention relates to a meltblown nonwoven fabric having a high bulkiness and a method for manufacturing the same, particularly to include a crimped yarn for imparting high mechanical strength of the obtained nonwoven fabric and a meltblown yarn having at least two types of diameters. Due to the presence of the barn, the nonwoven fabric itself has a high bulkiness to have excellent morphological stability and compression recovery ability, and the high bulkiness, microporosity, and specific surface area can be maximized by the presence of melt blown yarn composed of ultra-fine fibers. The present invention relates to a meltblown nonwoven fabric and a method of manufacturing the same.

In general, webs or nonwoven fabrics containing meltblown fibers can be used for sound absorption, sound insulation, thermal insulation, filtration of particulates, and / or water / oil separation. It is. In particular, it has often been found advantageous to use synthetic resins from different polymers at the same time. For example, US Patent No. 3,981,650 to Page describes a meltblowing die capable of simultaneously producing plastic filaments from two different polymers.

Meltblown webs can also be made of fibers of different diameters. For example, U.S. Patent No. 5,783,011 to Barboza et al. Discloses a filtration media formed of a mass of nonwoven meltblown support and filtration fibers disposed co-locally co-located with each other. The supporting fibers have, on average, a relatively larger diameter than the filtering fibers.

Also, U.S. Patent No. 6,315,806 to Torobin et al. Discloses a composite filtration media web of fibers containing a controlled dispersion of a mixture of polymer fibers of sub-micron and sub- .

Mikami US Pat. No. 6,319,865 describes a nozzle piece that provides, in one step, a meltblown nonwoven fabric composed of fine fibers having a diameter in the range of 1-10 μm.

So-called staple fibers are also added to meltblown nonwoven webs. For example, US Pat. No. 6,827,764 to Springett et al. Describes a filter element comprising a porous molded web containing heat-bonded staple fibers and non-heat-bonded and electrically charged meltblown fibers.

However, the nonwoven fabric obtained by including the crimped yarn for imparting high mechanical strength and imparting high bulkiness to the obtained nonwoven fabric and melt blown yarns having at least two kinds of diameters has a high bulky property, thereby providing excellent morphological stability and compression. There is still a need for the development of resilient meltblown nonwovens.

An object of the present invention is to include a crimped yarn for imparting high mechanical strength of the obtained nonwoven fabric and meltblown yarns having at least two diameters so that the nonwoven fabric itself has a high bulkiness due to the presence of the crimped yarn. The present invention provides a melt blown nonwoven fabric having high bulkiness due to the presence of melt blown yarns, having stability and compression recovery ability.

Another object of the present invention is to include a crimped yarn for imparting high mechanical strength of the obtained nonwoven fabric and meltblown yarns having at least two types of diameters so that the nonwoven fabric itself has high bulkiness due to the presence of the crimped yarn. It is to provide a method of producing a melt blown nonwoven fabric having a shape stability and compression recovery ability, and also having a high bulkiness due to the presence of the melt blown yarn.

Melt blown nonwoven fabric having a high bulkiness according to the present invention comprises 20 to 30% by weight of crimped yarn and melt blown yarn as the remaining amount, wherein the melt blown yarn includes melt blown yarns having different diameters. Characterized in that made.

The crimped yarn may be obtained by complex spinning two kinds of resins having different intrinsic viscosity (IV).

The crimped yarn may be obtained by complex spinning two kinds of resins having inherent viscosity differences within the range of 0.05 to 0.2.

The resin constituting the crimped yarn may be selected from the group consisting of nylon, polyester, polyurethane, polyacrylonitrile, polyolefin, cellulose and mixtures of two or more thereof.

The composite yarn of the crimping yarn may be a side-by-side type or an eccentric sheath core type.

The crimp may preferably have a diameter within the range of 20 to 40 μm.

The melt blown yarn may include melt blown yarns having 2 to 10 different diameters within a range smaller than the diameter of the crimped yarn.

The melt blown yarn is a high pressure low density polyethylene, linear low density polyethylene (LLDPE), which is a single or copolymer of alpha-olefins such as ethylene, propylene, 1-butene, 1-hexene, 4-methyl-1-pentene and 1-octene, High density polyethylene (HDPE), polypropylene (propylene homopolymer), polypropylene random copolymer, poly1-butene, poly4-methyl-1-pentene, ethylene propylene random copolymer, ethylene1-butene random copolymer, propylene 1 Polyolefins such as butene random copolymers, polyesters (polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, etc.), polyamides (nylon-6, nylon-66, polymethyleneadipamide, etc.), polychlorinated Vinyl, ethylene vinyl acetate copolymer, ethylene vinyl acetate vinyl alcohol copolymer, ethylene (meth) acrylic acid copolymer, ethylene-acrylic acid ester-carbon monoxide copolymer, Polyacrylonitrile, polycarbonate, polystyrene, ionomers (polymers in which carboxyl groups are partially substituted with zinc (Zn), sodium (Na), calcium (Ca) ammonium (NH ₄ ), etc.) Or a group consisting of two or more of these mixtures.

The melt blown yarns may be melt blown yarns preferably having diameters in the range of 1 to 10 μm.

The melt blown yarns more preferably have a first melt blown yarn having a diameter in the range of 1 to 2 μm, a second melt blown yarn having a diameter in the range of 3 to 6 μm and a diameter in the range of 7 to 10 μm. It consists of a third melt blown yarn having, based on the total weight of the nonwoven fabric, the second melt blown yarn 10 to 20% by weight, the third melt blown yarn 10 to 20% by weight and the balance as the first It may be made to include a melt blown yarn.

Method for producing a melt blown nonwoven fabric having a high bulkiness according to the present invention, (1) two or more melt blown yarns having different diameters, and two kinds of different intrinsic viscosity (IV; A compound spinning step of simultaneously spinning a resin at the same time to simultaneously radiate a potentially crimping potential yarn having a crimp property in a meltblown manner; (2) The mixing ratio of the two or more melt blown yarns obtained in the composite spinning step and the latent crimping yarns is within the range of 20 to 30% by weight based on the total weight of the fiber mixture obtained after their mixing. A mixing amount adjusting step of adjusting the potential crimping yarn and the melt blown yarn as the remaining amount; And (3) a cooling step of cooling the obtained fiber mixture to impart crimping to the latent crimping yarns.

The two kinds of resins having different intrinsic viscosities may be intrinsic viscosity differences within the range of 0.05 to 0.2.

The resin constituting the crimped yarn may be selected from the group consisting of nylon, polyester, polyurethane, polyacrylonitrile, polyolefin, cellulose and mixtures of two or more thereof.

The composite yarn of the crimping yarn may be a side-by-side type or an eccentric sheath core type.

The meltblown crimping yarn may preferably be one having a diameter within the range of 20 to 40 μm.

The melt blown yarn may include melt blown yarns having 2 to 10 different diameters within a range smaller than the diameter of the melt blown crimped yarn.

The melt blown yarn is a high pressure low density polyethylene, linear low density polyethylene (LLDPE), which is a single or copolymer of alpha-olefins such as ethylene, propylene, 1-butene, 1-hexene, 4-methyl-1-pentene and 1-octene, High density polyethylene (HDPE), polypropylene (propylene homopolymer), polypropylene random copolymer, poly1-butene, poly4-methyl-1-pentene, ethylene propylene random copolymer, ethylene1-butene random copolymer, propylene 1 Polyolefins such as butene random copolymers, polyesters (polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, etc.), polyamides (nylon-6, nylon-66, polymethyleneadipamide, etc.), polychlorinated Vinyl, ethylene vinyl acetate copolymer, ethylene vinyl acetate vinyl alcohol copolymer, ethylene (meth) acrylic acid copolymer, ethylene-acrylic acid ester-carbon monoxide copolymer, Polyacrylonitrile, polycarbonate, polystyrene, ionomer or a mixture of two or more thereof.

The melt blown yarns may be melt blown yarns preferably having diameters in the range of 1 to 10 μm.

The melt blown yarns more preferably have a first melt blown yarn having a diameter in the range of 1 to 2 μm, a second melt blown yarn having a diameter in the range of 3 to 6 μm and a diameter in the range of 7 to 10 μm. It consists of a third melt blown yarn having, based on the total weight of the nonwoven fabric, the second melt blown yarn 10 to 20% by weight, the third melt blown yarn 10 to 20% by weight and the balance as the first It may be made to include a melt blown yarn.

In addition, the melt blown nonwoven fabric having a high bulkiness according to the present invention discharges molten resin through spinnerets having different diameters to form melt blown yarns having different diameters and at the same time different melt viscosity IV; two kinds of resins having intrinsic viscosity) in a meltblown manner to form latent yarns, and the obtained meltblown yarns and latent yarns are mixed, but the two or more meltblown yarns And the mixing ratio of the latent crimping yarns to be the potential crimping yarns and the melt blown yarns as a residual amount within a range of 20 to 30% by weight based on the total weight of the fiber mixture obtained after their mixing, and cooling them to Obtained by imparting crimp to the latent crimping house.

According to the present invention, it is possible to include polyester crimp yarn for imparting high mechanical strength of the obtained nonwoven fabric and vinyl melt blown fibers having at least two kinds of diameters to maintain high shape retention performance of the nonwoven fabric itself. There is an effect of providing a meltblown nonwoven fabric having a high bulkiness, which can facilitate the use and exhibit high filtration performance, and a manufacturing method thereof.

1 is a graph showing the physical property test results of the sound absorbing nonwoven fabric of Examples and Comparative Examples according to the present invention.

Hereinafter, a preferred embodiment of the present invention will be described in detail. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted so as to avoid obscuring the subject matter of the present invention.

The terms " about "," substantially ", etc. used to the extent that they are used herein are intended to be taken to mean an approximation of, or approximation to, the numerical values of manufacturing and material tolerances inherent in the meanings mentioned, Accurate or absolute numbers are used to help prevent unauthorized exploitation by unauthorized intruders of the referenced disclosure.

Melt blown nonwoven fabric having a high bulkiness according to the present invention comprises 20 to 30% by weight of crimped yarn and melt blown yarn as the remaining amount, wherein the melt blown yarn includes melt blown yarns having different diameters. Characterized in that made. Meltblown nonwovens having high bulkiness can be obtained by the process according to the invention as described above.

The melt blown yarns having at least two kinds of diameters function as microfibers which perform functions such as sound absorption, sound insulation, heat insulation, filtration of fine particles and / or water / oil separation in the nonwoven fabric obtained. .

The crimped yarn may be obtained by complex spinning two kinds of resins having different intrinsic viscosity (IV). The crimped yarn may preferably be obtained by complex spinning two kinds of resins having inherent viscosity differences within the range of 0.05 to 0.2. If the difference in intrinsic viscosity is less than 0.05, there may be a problem that it is difficult to give a sufficient crimp, if the excess exceeds 0.2, the melt blown microfibers are stuck to each other or the knee is stuck to the nozzle occurs do. After spun by two kinds of resins having different intrinsic viscosities, by spun composite, in particular to be a side-by-side type or an eccentric sheath core type High elasticity is imparted by imparting crimp to the fibers produced by the shrinkage difference between the two resins generated on the basis of the difference in intrinsic viscosity above by cooling, preferably by quenching to a temperature of 0 to 24 ° C. In addition, excellent compression recovery can be provided. When the cooling temperature is less than 0 ° C, there may be a problem that the surface of the detention is cooled and the discharge is uneven and the radial tension is increased, the thread trimming occurs, on the contrary, if it exceeds 24 ° C, the cooling is not enough There may be problems arising from fusion. The resin constituting the crimped yarn may be selected from the group consisting of nylon, polyester, polyurethane, polyacrylonitrile, polyolefin, cellulose and mixtures of two or more thereof. However, the present invention is not limited to the materials forming these crimps, and these can be understood as those listed by way of example only, and it can be understood by those skilled in the art that they can be used in the manufacture of other synthetic resins or the crimps. It can be. In particular, the crimping yarn may be one having a diameter within the range of preferably 20 to 40㎛. If the diameter of the crimped yarn is less than 20㎛ may have a problem that the compressive modulus decreases, on the contrary, if it exceeds 40㎛, there may be a problem that the sound absorption performance is lowered.

The melt blown yarn may include melt blown yarns having 2 to 10 different diameters within a range smaller than the diameter of the crimped yarn. When the melt blown yarns having different diameters are less than two, i.e., only one type or no melt blown yarn is used, sound absorption, sound insulation, heat insulation, filtration and / or water / If the function as a fine fiber that performs functions such as water / oil separation is insufficient or vice versa, there are problems such as difficulty in manufacturing, difficulty in process control and increase in unit cost in the production of nonwoven fabrics. There can be. remind Meltblown yarns are high pressure low density polyethylene, linear low density polyethylene (LLDPE), high density, which are single or copolymers of alpha-olefins such as ethylene, propylene, 1-butene, 1-hexene, 4-methyl-1-pentene and 1-octene Polyethylene (HDPE), polypropylene (propylene homopolymer), polypropylene random copolymer, poly1-butene, poly4-methyl-1-pentene, ethylenepropylene random copolymer, ethylene1-butene random copolymer, propylene1- Polyolefins such as butene random copolymers, polyesters (polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, etc.), polyamides (nylon-6, nylon-66, polymethylene adipamide, etc.), polyvinyl chloride , Ethylene vinyl acetate copolymer, ethylene vinyl acetate vinyl alcohol copolymer, ethylene (meth) acrylic acid copolymer, ethylene-acrylic acid ester-carbon monoxide copolymer, poly It may be selected from the group consisting of acrylonitrile, polycarbonate, polystyrene, ionomer or a mixture of two or more thereof.

The melt blown yarns may be melt blown yarns preferably having diameters in the range of 1 to 10 μm. When the diameter of the melt blown yarn is less than 1 μm, there may be a problem that the high form stability and / or high bulkiness due to the crimped yarn may not be sufficient, and when the diameter exceeds 10 μm, the fineness of the nonwoven fabric as a whole As the thickness becomes thicker, the sound absorbing performance of the high frequency of 2 kHz or more may decrease. The melt blown yarns more preferably have a first melt blown yarn having a diameter in the range of 1 to 2 μm, a second melt blown yarn having a diameter in the range of 3 to 6 μm and a diameter in the range of 7 to 10 μm. It consists of a third melt blown yarn having, based on the total weight of the nonwoven fabric, the second melt blown yarn 10 to 20% by weight, the third melt blown yarn 10 to 20% by weight and the balance as the first It may be made to include a melt blown yarn.

In addition, the manufacturing method of the melt-blown nonwoven fabric having a high bulkiness according to the present invention, (1) two or more melt blown yarns having different diameters, and two having different intrinsic viscosity (IV; A composite spinning step of simultaneously spinning a resin of a species to simultaneously radiate a potential crimping yarn having a potential crimping property; (2) The mixing ratio of the two or more melt blown yarns obtained in the composite spinning step and the latent crimping yarns is within the range of 20 to 30% by weight based on the total weight of the fiber mixture obtained after their mixing. A mixing amount adjusting step of adjusting the potential crimping yarn and the melt blown yarn as the remaining amount; And (3) a cooling step of cooling the obtained fiber mixture to impart crimping to the latent crimping yarns.

The melt blown yarn forming step of (1) is to form melt blown yarns having different diameters, and the formation of such melt blown yarns may be performed by those skilled in the art. It can be obtained by carrying out the same or similar method as in preparation. That is, the thermoplastic polymer or resin is extruded through a uniformly arranged spinneret (orifice) into a high speed gas stream, which refines the material exiting the spinneret into fibers. The gas flow creates turbulence that randomly entangles the fibers to form a cohesive nonwoven (web) on the collector. The collector can be a moving flat belt or a rotating cylindrical screen or drum. However, such a method is merely one example, and it will be understood by those skilled in the art that it is possible to simultaneously manufacture a melt blown yarn and a potential crimp yarn by appropriately modifying or modifying it by a commercially provided spinning apparatus and the accompanying spinning method. It can be.

The mixing amount adjusting step of (2) is 20 to 30% by weight based on the total weight of the fiber mixture obtained by mixing the two or more melt-blown yarns and the potential crimps obtained in the complex spinning step It consists of adjusting to be latent stalls and melt blown yarns within the amount of. When the content of the latent crimped yarn is less than 20% by weight based on the total amount of the fiber mixture, there may be a problem in that the crimped yarn has a high form stability and / or high bulkiness, which is not sufficient. When the weight percentage is exceeded, the sound absorbing performance may decrease while the nonwoven fabric is thickened as a whole.

By performing the cooling step of (3), the obtained fiber mixture may be cooled to impart crimping to the latent crimping yarns to form crimping yarns.

Such a construction makes it possible, in particular, to impart high, high morphological stability and / or high bulkiness to the nonwoven fabric obtained due to the presence of the crimping yarns, and thus to a nonwoven fabric comprising crimping yarns and meltblown yarns. It can be produced in-situ, it is also possible to obtain a nonwoven fabric having a high mechanical workability. Such good machinability is advantageous in that the resulting nonwoven fabric is suitable for processing into a desired form of sound absorption, sound insulation, thermal insulation, filtration of particulates and / or water / oil separation. Has

The materials used, the reason for the numerical limitation, etc. are the same or similar to those described in the method for producing the meltblown nonwoven fabric having the high bulkiness according to the present invention, and the repeated description will be avoided.

Meltblown nonwoven fabric having a high bulkiness according to the present invention is manufactured using a pre-formed crimped yarn to produce a nonwoven fabric including crimped yarns, and by discharging molten resin through spinnerets having different diameters, different diameters are obtained. At the same time to form a melt blown yarn having a melt blown yarns thus formed are mixed with the crimped yarn to produce a nonwoven fabric (web). At this time, the crimping yarn is included in an amount of 20 to 30% by weight based on the total weight of the nonwoven fabric, and thus the meltblown yarn is included as the remaining amount, from which the meltblown nonwoven fabric having a high bulkiness according to the present invention is included. Can be obtained.

In addition, the melt-blown nonwoven fabric having a high bulkiness according to the present invention, instead of using a pre-prepared crimping yarn, a composite yarn of two kinds of resins having different intrinsic viscosity (IV; Forming and discharging molten resin through spinnerets having different diameters at the same time and / or sequentially and mixing with melt blown yarns having different diameters and cooling to impart crimp to the latent crimping yarn. While simultaneously forming a nonwoven fabric (web), wherein the crimping yarn is included in an amount of 20 to 30% by weight based on the total weight of the nonwoven fabric, and thus the meltblown yarn is included as the remaining amount, It is possible to obtain a meltblown nonwoven fabric having a high bulkiness according to the invention.

Hereinafter, examples of a manufacturing method for manufacturing a meltblown nonwoven fabric having a high bulkiness according to the present invention are shown, but the present invention is not limited to these examples.

Example  One

Two kinds of polyester resins selected to have an intrinsic viscosity difference of 0.1, that is, a polyester resin having an intrinsic viscosity of 0.45 and a polyester resin having an intrinsic viscosity of 0.35 are selected, and these are side-by-side type. 1) a first polypropylene melt blown yarn having a diameter in the range of 1.5 μm and a second polypropylene melt blown yarn having a diameter in the range of 4.5 μm And simultaneous spinning of third polypropylene melt blown yarns having a diameter in the range of 8.5 μm to produce melt blown yarns having three different diameters, and mixing them with each other in a vertically descending air stream, Crimp yarn to be 25% by weight, 15% by weight of the second polypropylene meltblown yarn, 15% by weight of the third polypropylene meltblown yarn and the first pole Polypropylene meltblown unsa i.e. the residual amount, were mixed together such that 45% by weight to prepare a nonwoven fabric having a total of 200g / m ² to give a volume housing having to quench air flow of 5 ℃ in the process, and the crimp.

The obtained fiber mixture formed a web suitable for processing into a nonwoven fabric, which has excellent compressive recovery force and form stability, good mechanical workability, and high bulkiness, and exhibits excellent sound absorption effect as shown in Table 1 below. Accordingly, it has been confirmed that the sound absorbing material that satisfies the current sound absorption standards in the sound absorbing and sound insulating of automobiles, especially door trims and headlinings, can be provided.

Comparative Example  One

Surface density 200g / m ² , 100% polypropylene melt blown nonwoven fabric having a diameter of 5 ~ 10㎛ was prepared to confirm the sound absorption performance.

Comparative Example  2

In the same conditions as in Example 1 was prepared at room temperature (25 ℃) without cooling to prepare a non-woven fabric in an environment where sufficient crimp is not expressed.

Comparative Example  3

25 wt% of the second polypropylene meltblown yarn, 20 wt% of the third polypropylene meltblown yarn and the remaining amount of the first polypropylene meltblown yarn under the same conditions as in Example 1, that is, 30 wt% The nonwoven fabric was manufactured by designing the mold.

Experimental Method

1. Thickness: A sample was taken from the sound absorbing nonwoven fabric prepared according to Examples and Comparative Examples, and the sample was measured 20 times over the full width using a thickness gauge.

2. Noise reduction coefficient (NRC): A sample was taken in the same manner as the thickness measurement, and the sound absorption rate was measured using an in-tube method.

The physical property test results of the sound absorbing nonwoven fabric carried out as described above are shown in Table 1 (compare physical properties and sound absorption rates) and FIG. 1.

division thickness
(mm) Blemish 250 Hz 500Hz 1000Hz 2000Hz 3000Hz 4000 Hz NRC A (Comparative Example 1) 6 0.03 0.04 0.11 0.45 0.73 0.86 0.20 B (Comparative Example 2) 9 0.03 0.04 0.13 0.51 0.79 0.91 0.23 C (Comparative Example 3) 13 0.03 0.07 0.23 0.56 0.83 0.93 0.29 D (Example 1) 19 0.04 0.11 0.37 0.65 0.89 0.96 0.38

The present invention can be used in industries such as manufacturing a nonwoven fabric that can be used for sound absorption, sound insulation, heat insulation, filtration of particulates and / or water / oil separation, and the like.

(Without reference numerals)

Claims (20)

20 to 30% by weight of the crimping yarn and the melt blown yarn as a residual amount, including the melt blown yarn comprises a melt blown yarn having a different diameter,
The melt blown yarns have a first melt blown yarn having a diameter in the range of 1 to 2 μm, a second melt blown yarn having a diameter in the range of 3 to 6 μm and a third melt having a diameter in the range of 7 to 10 μm. Blown yarn, wherein the second melt blown yarn is 10 to 20% by weight based on the total weight of the nonwoven fabric, and the third melt blown yarn is 10 to 20% by weight and the balance includes the first melt blown yarn. Meltblown nonwoven fabric having high bulkiness, characterized in that it is made. The method of claim 1,
Melt-blown nonwoven fabric having a high bulkiness, characterized in that the crimped yarn is obtained by complex spinning two kinds of resins having different intrinsic viscosity (IV). 3. The method according to claim 1 or 2,
Melt-blown nonwoven fabric having a high bulkiness, characterized in that the crimped yarn is obtained by complex spinning two kinds of resins having inherent viscosity differences within the range of 0.05 to 0.2. 3. The method according to claim 1 or 2,
The melt-blown nonwoven fabric having high bulkiness, wherein the resin constituting the crimped yarn is selected from the group consisting of nylon, polyester, polyurethane, polyacrylonitrile, polyolefin, cellulose and a mixture of two or more thereof. The method of claim 1,
The composite spinning yarn of the crimping yarn is a side-by-side type or a centric core (Eccentric sheath core type), characterized in that the melt blown nonwoven fabric having a high bulkiness. 3. The method according to claim 1 or 2,
Melt blown nonwoven fabric having a high bulkiness, characterized in that the crimping yarn has a diameter within the range of 20 to 40㎛. delete The method of claim 1,
High pressure low density polyethylene, linear low density polyethylene (LLDPE), wherein the melt blown yarn is a single or copolymer of alpha-olefins such as ethylene, propylene, 1-butene, 1-hexene, 4-methyl-1-pentene, and 1-octene; High density polyethylene (HDPE), polypropylene (propylene homopolymer), polypropylene random copolymer, poly1-butene, poly4-methyl-1-pentene, ethylene propylene random copolymer, ethylene1-butene random copolymer, propylene 1 Polyolefins such as butene random copolymers, polyesters (polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, etc.), polyamides (nylon-6, nylon-66, polymethyleneadipamide, etc.), polychlorinated Vinyl, ethylene vinyl acetate copolymer, ethylene vinyl acetate vinyl alcohol copolymer, ethylene (meth) acrylic acid copolymer, ethylene-acrylic acid ester-carbon monoxide copolymer, A meltblown nonwoven fabric having a high bulkiness, characterized in that it is selected from the group consisting of polyacrylonitrile, polycarbonate, polystyrene, ionomer or a mixture of two or more thereof.
delete delete (1) Melt-blowing a potentially crimping latent yarn by simultaneously spinning two or more kinds of melt blown yarns having different diameters and two kinds of resins having different intrinsic viscosity (IV). Compound spinning step of simultaneously radiating in a manner;
(2) The mixing ratio of the two or more meltblown yarns and the latent crimps obtained in the composite spinning step is in the range of 20 to 30% by weight based on the total weight of the fiber mixture obtained after mixing them. A mixing amount adjusting step of adjusting the crimped yarn and the melt blown yarn as the remaining amount; And
(3) a cooling step of cooling the obtained fiber mixture to impart crimping to the latent crimping yarn; , ≪ / RTI >
The melt blown yarn is composed of three types, the first melt blown yarn having a diameter in the range of 1 to 2 μm, the second melt blown yarn having a diameter in the range of 3 to 6 μm and the diameter in the range of 7 to 10 μm. It consists of a third melt blown yarn having, based on the total weight of the nonwoven fabric 10 to 20% by weight of the second melt blown yarn, 10 to 20% by weight of the third melt blown yarn and the remaining amount of the first melt Method for producing a melt blown nonwoven fabric having a high bulkiness, characterized in that it comprises a blown yarn. The method of claim 11,
Method for producing a melt-blown nonwoven fabric having a high bulkiness, characterized in that the two kinds of resin having different intrinsic viscosity has a difference in intrinsic viscosity within the range of 0.05 to 0.2. 13. The method according to claim 11 or 12,
Manufacture of meltblown nonwoven fabric having high bulkiness, characterized in that the resin constituting the crimped yarn is selected from the group consisting of nylon, polyester, polyurethane, polyacrylonitrile, polyolefin, cellulose and mixtures of two or more thereof. Way. The method of claim 11,
The method of manufacturing a melt blown nonwoven fabric having a high bulkiness, characterized in that the composite yarn of the crimping yarn is a side-by-side type or an eccentric sheath core type. 13. The method according to claim 11 or 12,
The crimping yarn is a method of producing a melt blown nonwoven fabric having a high bulkiness, characterized in that having a diameter within the range of 20 to 40㎛. delete The method of claim 11,
High pressure low density polyethylene, linear low density polyethylene (LLDPE), wherein the melt blown yarn is a single or copolymer of alpha-olefins such as ethylene, propylene, 1-butene, 1-hexene, 4-methyl-1-pentene, and 1-octene; High density polyethylene (HDPE), polypropylene (propylene homopolymer), polypropylene random copolymer, poly1-butene, poly4-methyl-1-pentene, ethylene propylene random copolymer, ethylene1-butene random copolymer, propylene 1 Polyolefins such as butene random copolymers, polyesters (polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, etc.), polyamides (nylon-6, nylon-66, polymethyleneadipamide, etc.), polychlorinated Vinyl, ethylene vinyl acetate copolymer, ethylene vinyl acetate vinyl alcohol copolymer, ethylene (meth) acrylic acid copolymer, ethylene-acrylic acid ester-carbon monoxide copolymer, A method for producing a meltblown nonwoven fabric having high bulkiness, characterized in that it is selected from the group consisting of polyacrylonitrile, polycarbonate, polystyrene, ionomer or a mixture of two or more thereof.
delete delete delete

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