KR101684152B1

KR101684152B1 - Polyester staple fiber of heteromorphy section having an excellent filtering property and and the manufacturing method thereof

Info

Publication number: KR101684152B1
Application number: KR1020150103630A
Authority: KR
Inventors: 박재규; 김대희; 김민철; 박찬규
Original assignee: 도레이첨단소재 주식회사
Priority date: 2015-07-22
Filing date: 2015-07-22
Publication date: 2016-12-07

Abstract

The present invention relates to a heteromorphic section polyester staple fiber filtering material having excellent filtering performance and a method for manufacturing the same. The heteromorphic section polyester staple fiber filtering material having excellent filtering performance according to the present invention comprises the steps of: manufacturing heteromorphic section yarn by spinning a polyester polymer having a single yarn denier less than 0.5 via a spinning nozzle with two or more bent curved surfaces having a heteromorphic level ranging from 0.5 to 1.5; manufacturing 3.0-5.0 mm short-cut stable yarn by using elongated, entangled and wound filament yarn; and fabricating a filter by passing the short-cut stable yarn through a composition step, a paper step, a processing step, and a slitter step. In accordance with the heteromorphic section polyester staple fiber filtering material having excellent filtering performance and the method for manufacturing the same according to the present invention, a process of manufacturing heteromorphic section filament yarn is simplified, and operation efficiency is excellent. Furthermore, a rate of change in section is low and evenness of yarn is excellent, and thus excellent dust collection efficiency is achieved due to an increase in a contact surface during manufacture of the filter. Moreover, short-cut distribution is excellent, and thus an improved filter function is provided.

Description

TECHNICAL FIELD [0001] The present invention relates to a polyester staple fiber filter having excellent filter performance and a manufacturing method thereof,

The present invention relates to a modified cross-section polyester staple fiber filter having excellent filter performance and a method for producing the same, and more particularly to a spinning nozzle having a spinning nozzle having two or more curved surfaces with a deviation of 0.5 to 1.5, In producing a polyester filament yarn, the production process is simple and excellent in operability, and the length of the short-cut yarn using the above-mentioned modified cross-section yarn is 3.0 to 5.0 mm, so that the dispersibility is excellent and the dust is collected by increasing the curved surface The present invention relates to a modified cross-section polyester staple fiber filter having excellent filter performance and a manufacturing method thereof.

In general, a filter of an automobile is installed on an intake manifold of an engine and an air inlet of an automobile interior to collect impurities in the air to be introduced so as to perform combustion close to complete combustion in the engine to suppress the generation of soot, And the like.

The filter of the air cleaner according to the related art, that is, the filter medium is generally composed of a filter paper made mainly of natural fibers such as pulp or a liner, and the filter paper is accommodated in the case in a folded and folded form many times. However, there has been a problem in that the filter paper mainly composed of such natural fibers has a high unit cost and a difficulty in the manufacturing process.

For example, Korean Patent Laid-Open Publication No. 2014-7014921 (Patent Document 1) discloses a method using a first paper making raw material for an upper layer and a second paper making raw material for a lower layer to prepare a filter having a gradient from the upper layer to the lower layer, Wherein the blending ratio of the chemical fibers in the first papermaking material is higher than the blending ratio of the chemical fibers in the second papermaking material, And that the thickness of the chemical fiber in the first paper making raw material is thicker than the thickness of the chemical fiber in the second paper making raw material. In Korean Patent Registration No. 10-0851535 (Patent Document 2) Wherein the cut surface of the short cut staple fibers is uniformed by introducing the cut short staple fibers to improve the dispersibility. Discloses a method for producing a fiber.

However, since the method disclosed in Patent Document 1 includes natural fibers and chemical fibers, the cost of the raw materials is high, the production process is complicated, and there is still a disadvantage in that the function of the filter can not be enhanced only by the difference between the blending ratio and the thickness. The method disclosed in Patent Document 2 has a problem in that the method introduced to uniformly cut the sections is complicated in the production process and may hinder the environment.

Accordingly, the inventors of the present invention have conducted extensive research in order to solve various problems in the above-described conventional techniques, and have found that it is possible to improve the dust collecting ability by specifying the degree of fiber separation and adjusting the length, .

Patent Document 1: Korean Patent Laid-Open Publication No. 2014-7014921 Patent Document 2: Korean Patent Registration No. 10-0851535

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned technical problems in the prior art, and it is a primary object of the present invention to provide a method of manufacturing a semiconductor device having a simple production process, excellent workability and excellent dispersibility, To increase the contact area with which the dust can be collected due to the increase of the number of the staple fibers.

Another object of the present invention is to provide a manufacturing method which can more easily produce a modified cross-section polyester staple fiber filter excellent in filter performance having the excellent characteristics described above.

The present invention may also be directed to accomplishing other objects that can be easily derived by those skilled in the art from the overall description of the present specification, other than the above-described and obvious objects.

In order to accomplish the above object, the present invention provides a method for producing a modified cross-section polyester staple fiber filter having excellent filter performance, comprising:

A cross-cut yarn is produced by spinning a polyester polymer with a single yarn fineness of less than 0.5 denier in a spinning nozzle having two or more curved curved surfaces having a deviation of 0.5 to 1.5, and a 3.0 to 5.0 mm short cut A staple yarn is manufactured, and then the staple yarn is produced through a composition process, a papermaking process, a processing process, and a slitter process.

According to the configuration of the present invention, the length of the short-cut yarn using the modified cross-section filament yarn is set to 3.0 to 5.0, and the filter performance is improved due to the excellent dispersibility and the increase of the contact area, The nozzle can be made into an excellent cross-section polyester fiber for a short cut, and the cross-sectional shape is a nozzle having two or more curved curved surfaces with a deviation degree of 0.5 to 1.5, so that the contact area of the manufactured yarn can be widened, Can be made excellent.

According to another aspect of the present invention, in the manufacturing method, an annular cooling device of an in-out system is used as a cooling method in order to provide uniform cooling of the yarn.

According to another embodiment of the present invention, the cooling temperature is 20 to 30 占 폚.

According to a further feature of the invention, the cooling can open market is characterized by having a bottom opening of 20 to 50 mm.

According to another embodiment of the present invention, the filament yarn is characterized in that the filament yarn has a migration pressure of 0.2 to 0.7 kg / cm < 2 >

According to another embodiment of the present invention, the spunbonded filament yarn is produced by stretching the filament yarn at a stretching ratio of 1.5 to 3.0 while passing through four godet rollers and entangling the filament yarn at a tension of 1.0 to 2.0 kg / .

According to still another aspect of the present invention, the winding speed in the winding step is 3000 to 5000 m / min.

The polyester staple fiber filter having excellent filter performance according to the present invention having the above-described structure and the method for producing the same have a simple production process, excellent processability, less variation in cross section and uniformity The contact surface is increased and the dust collecting efficiency is excellent, and the short cut is excellent in dispersibility, thereby providing an improved filter function, thereby solving the above-mentioned conventional problems.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic diagram of a process, schematically illustrating a process for producing polyester homologous cross-section fibers according to a preferred embodiment of the present invention,
FIG. 2 is a schematic view showing a process for manufacturing a short-cut staple fiber utilizing polyester heterostructure cross-section fibers according to a preferred embodiment of the present invention.

Hereinafter, the present invention will be described in more detail with reference to the preferred embodiments, but it goes without saying that the present invention is not limited to the following embodiments, and various modifications may be made within the scope of the present invention. Furthermore, well-known components, well known operations, and well-known techniques are not specifically described in the detailed description to avoid obscuring the present invention.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In the present specification, the singular forms include plural forms unless otherwise specified in the specification. Also, components and acts referred to as " comprising (or comprising) " do not exclude the presence or addition of one or more other components and operations.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic diagram of a process outlining a process for producing polyester homogeneous sectioned filament fibers according to a preferred embodiment of the present invention, FIG. 2 is a schematic view showing a process for manufacturing a short-cut staple fiber.

As shown in the figure, the production of short cut staple fibers for a filter utilizing polyester unfixed sectioned filament fibers according to the present invention is carried out by first melt- ing a polymer in a spinneret 1 having two or more curved curved surfaces with a deviation degree of 0.5 to 1.5 The total fineness is 70 to 150 denier and the single fiber fineness is less than 0.5 denier. At this time, the cross-section of the short-cut staple fiber may be characterized by stretching resignation in which various cross-sections can be applied without being limited to a specific shape.

In order to uniformly cool the polymer after spinning it, an in-out ring-shaped cooling device is preferably used, wherein the cooling temperature is preferably 20 to 30 ° C. Also, in order to increase the cooling efficiency, the cooling can open market is used at 20 to 50 mm under the spinneret. If it is less than 20 mm, the surface of the filter is reduced due to the occurrence of irregularity in cross section due to temperature variation of the beating temperature, and the filter function is deteriorated. On the other hand, if it exceeds 50 mm, I do not.

The radially spun polyester cross-section long fibers are passed through an emulsion applying device and then migrated to a pressure of 0.2 to 0.7 kg / cm 2 (2). (2) If the pressure is less than 0.2 kg / cm 2, the uniform coating of the emulsion is not made and the unstiffened cross section becomes unstable during the production of filaments. If the pressure exceeds 0.7 kg / cm 2, excessive migration (2) It is undesirable that the operation efficiency is poor due to the generation of the winding current. The polyester heterogeneous cross-section continuous filament that has passed through the migration 2 passes through the first godet roller 3 at 50 to 100 ° C and the third godet roller 5 at 100 to 130 ° C after several turns of the second godet roller 4 And the fourth godet roller 6 is rotated several times. In this case, it is particularly preferable that the first godet roller 3 and the third godet roller 5 have a stretching ratio of 1.5 to 3.0. By doing so, it is possible to produce a cross-section filament yarn having a small variation in cross-sectional area and excellent workability when producing a cross-section filament.

According to another preferred embodiment of the present invention, the winding roller speed of the present invention is preferably 3000 to 5000 m / min. If it is less than 3000 m / min, the cross section of the modified cross section is uneven and the filter function is deteriorated. On the other hand, if the flow rate exceeds 5000 m / min, the discharge amount increases and it is not desirable to increase the spinning tolerance due to uneven cooling.

According to another preferred embodiment of the present invention, it is preferable to apply a pressure of 1.0 to 2.0 kg / cm < 2 > in the second interchanging part 7. If the pressure of the second intertwining part is less than 1.0 kg / And when it is more than 2.0 kg / cm 2, it is not preferable because of excessive scattering, the dispersibility in the papermaking process is deteriorated and the filter function is deteriorated.

According to another preferred embodiment of the present invention, the short-cut length is preferably 3.0 to 5.0 millimeters. If it is less than 3.0 mm, the web formation is deteriorated to decrease the strength of the filter to deteriorate the filter function. Conversely, Which is undesirable.

According to another preferred embodiment of the present invention, it is general to include a composition process, a papermaking process, a processing process, and a slitter process in order to produce a filter with the short staple fibers, Since a well-known conventional method can be used, a detailed description will be omitted.

As described above, the short cut staple fiber yarn according to the present invention is formed by a modified cross-sectional yarn to improve the dust collecting ability by increasing the contact surface and to produce a short staple yarn having a single yarn fineness of less than 0.5 denier and a 3.0 to 5.0 mm short stitch. .

Hereinafter, the present invention will be described in more detail with reference to Examples, but the scope of the present invention is not limited to these Examples.

Example 1

A polyester having a titanium dioxide content of 0.3% by weight and an intrinsic viscosity (?) Of 0.652 was emulsified at a spinning temperature of 285 占 폚 in an M-shaped cross section having a single yarn fineness of 0.35 denier and a rejection degree of 0.7, After the migration by pressure, the mixture was radiated at a speed of 3000 m / min in a godet roller at a draw ratio of 4 at a drawing speed of 4700 m / min. Then, the laminate was heated at a drawing temperature of 80 DEG C and thermally fixed at 120 DEG C to form 2.5 kg / A 3.0 mm short cut staple yarn was produced from 100 denier filament yarn wound with pressure, and then a filter was manufactured through a composition process, a papermaking process, a processing process, and a slitter process.

Example 2

A filter was prepared in the same manner as in Example 1, except that the triangular section and the uniaxiality were 1.0 in Example 1.

Example 3.

A filter was fabricated in the same manner as in Example 1 except that the section was U-shaped and the profile was 1.3.

Example 4

A filter was prepared in the same manner as in Example 1 except that the cross section was made hollow.

Comparative Example 1

A filter was manufactured in the same manner as in Example 1 except that the short length was set to 7.0 mm in Example 1. [

Comparative Example 2

The polyesters having an intrinsic viscosity (?) Of 0.652 having a titanium dioxide content of 0.3% by weight were radiated at a spinning temperature of 285 占 폚, a single yarn fineness was radiated to a 0.35 denier circular cross section, and an emulsion was applied to migrate to a pressure of 0.8 kg / And the mixture was radiated at a speed of 3000 m / min in a godet roller and stretched at a draw ratio of 1.6 at 4700 m / min. Then, the laminate was heated at a draw temperature of 80 DEG C, heat set at 120 DEG C and wound at 2.5 kg / After making a 5.0mm short cut staple yarn with 100 denier filament yarn, the filter was manufactured through the composition process, papermaking process, processing process, and slitter process.

Comparative Example 3

A filter was prepared in the same manner as in Comparative Example 2 except that the monofilament fineness was 0.31 denier and the short-cut length was 7.0 in Comparative Example 2.

Comparative Example 4

A filter was prepared in the same manner as in Comparative Example 2, except that in Comparative Example 2, the cordierite was spun at a speed of 2200 m / min and stretched at a draw ratio of 1.59 at 3500 m / min.

Comparative Example 5

A filter was prepared in the same manner as in Comparative Example 2, except that the short length in Comparative Example 2 was 3.5 mm.

Comparative Example 6

A filter was prepared in the same manner as in Comparative Example 2 except that the entanglement pressure was changed to 3.0 kg / cm 2 in Comparative Example 2.

division Yes Example 1 Example 2 Example 3 Example 4 Comparative Example 1 Sectional shape M (0.7) (1.0) U (1.3) ◎ (-) M (0.7) Shortcut length 3.0 5.0 5.0 5.0 7.0 Dispersibility ◎ ◎ ◎ ○ X Filtration function ◎ ○ ○ △ ○

division Comparative Example 2 3 4 5 6 Section shape ○ ○ ○ ○ ○ Monosanthin 0.35 0.31 0.35 0.35 0.35 Spinning speed 3000 3000 2200 3000 3000 Production speed 4700 4700 3500 4700 4700 Stretching cost 1.60 1.60 1.59 1.60 1.60 Shortcut length 5.0 7.0 5.0 3.0 5.0 Interlocking pressure 2.5 2.5 2.5 2.5 3.0 Dispersibility ○ ○ ○ ◎ x Filtration function x x x x x

As shown in Tables 1 and 2, according to the present invention, the filter made of short cut staple fibers, that is, the filter, is superior to the conventional method in terms of dispersibility and filtering function.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. .

1 --- spinning detention 2 --- migration
3 --- 1st godet roller 4 --- 2nd godet roller
5 --- 3rd godet roller 6 --- fourth godet roller
7 --- 2nd interchange part 8 --- Filament company
9 --- Crimping machine 10 --- Heater
11 --- Cutter

Claims

A step of spinning a polyester polymer having an intrinsic viscosity (?) = 0.652 level containing titanium dioxide to a yarn fineness of less than 0.5 denier in a spinning nozzle having two or more curved curved surfaces having a deviation degree of 0.5 to 1.5 to prepare a modified cross- ;
Stretching the spunbonded cross-section yarn at a constant stretching ratio, then heat-setting the foil to a short-cut staple yarn at 3.0 to 5.0 mm with a filament yarn entrained with a predetermined entanglement pressure to produce yarns excellent in dispersibility; And
The method of claim 1, wherein the staple fiber is fabricated through a composition process, a papermaking process, a processing process, and a slitter process.

[2] The method according to claim 1, wherein the manufacturing method uses an in-out annular cooling device for cooling the yarn in order to uniformly cool the yarn. A method of manufacturing a filter.

The method according to claim 1, characterized in that the cooling can open market is in the lower 20 to 50 mm of detention.

The method according to claim 1, wherein the filament yarn has a migration pressure of 0.2 to 0.7 kg / cm 2 in order to uniformly apply the emulsion after spinning.

[3] The method according to claim 1, wherein the spunbonded filament yarn is produced by stretching the filament yarn at a stretching ratio of 1.5 to 3.0 while passing through four godet rollers and intermingling the yarn at a tension of 1.0 to 2.0 kg / A method of making a cross section of a polyester staple fiber filter excellent in filter performance.

The method according to claim 1, wherein the winding speed in the winding step is 3000 to 5000 m / min.