KR101874742B1 - The method for manufacturing Polyester nonwoven fabric having an improved permeability - Google Patents
The method for manufacturing Polyester nonwoven fabric having an improved permeability Download PDFInfo
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- KR101874742B1 KR101874742B1 KR1020170036837A KR20170036837A KR101874742B1 KR 101874742 B1 KR101874742 B1 KR 101874742B1 KR 1020170036837 A KR1020170036837 A KR 1020170036837A KR 20170036837 A KR20170036837 A KR 20170036837A KR 101874742 B1 KR101874742 B1 KR 101874742B1
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- South Korea
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- polyester
- nonwoven fabric
- melting point
- present
- low
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4326—Condensation or reaction polymers
- D04H1/435—Polyesters
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/542—Adhesive fibres
- D04H1/55—Polyesters
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H13/00—Other non-woven fabrics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
- B01D2239/0604—Arrangement of the fibres in the filtering material
- B01D2239/0618—Non-woven
Abstract
The present invention relates to a process for producing a polyester nonwoven fabric having improved permeability, wherein the polyester nonwoven fabric having improved permeability of the present invention is produced by spinning a polyester polymer and drawing filaments through an ejector, A polyester nonwoven fabric produced by forming a web on a conveyor belt by filament carding and then bonding, wherein the polyester polymer comprises a high melting point polyester having a melting point of 250 DEG C or higher and a low melting point polyester having a melting point of 230 DEG C or lower, Wherein the ratio of the low melting point polyester is 10% by weight to 30% by weight based on the total weight of the whole polyester polymer, and the density of the nonwoven fabric is 0.3 g / cm3 to 1.0 g / cm3.
In the method for producing a polyester nonwoven fabric having improved permeability as described above, the fineness of the filament is increased by using a polyester polymer having a specific constitution, and the embossed portion is removed using the air permeation bonding method, so that the air permeability A nonwoven fabric which can be effectively used as a PVD filter having an effect of improving the tear strength and improving the densification while improving the effect of filtration, Respectively.
Description
The present invention relates to a method for producing a polyester nonwoven fabric having improved permeability, more specifically, by increasing the fineness of a filament and improving the air permeability by eliminating the embossed portion by using the air through bonding method, And a method of producing a polyester nonwoven fabric capable of increasing the density while improving the effect of filtering.
BACKGROUND ART [0002] Nonwoven fabrics have heretofore been widely used in various fields such as sanitary, medical, agricultural or industrial fields. Especially, polyester nonwoven fabric is utilized in various fields.
However, such a polyester nonwoven fabric is constituted of various polymer compositions depending on the purpose of use to impart desired characteristics. There are many proposals for imparting the polyester nonwoven fabric particularly in the air permeability for use in various applications For example, Korean Patent Registration No. 10-0829087 (Patent Document 1) discloses a spunbond long-fiber nonwoven fabric for clothes dryers and a method for producing the same, which includes a composite spinning material made of polyester and a low melting point polyester Melting the filaments, spinning them in a sheath / core method to form filament bundles, and opening and fusing the filament bundles on the moving net, wherein the sheath / And the core used in the sheath / core method has an intrinsic viscosity (IV) of 0.650, Characterized in that the sheath is a low-melting-point polyester having an intrinsic viscosity (IV) of 0.70 and a melting temperature of 225, and the hot-melt bonding is carried out using a hot air blowing method in which hot air is circulated and adhered And a method for producing the spunbond long-fiber nonwoven fabric for a clothes dryer ", Korean Patent Registration No. 10-1187382 (Patent Document 2) discloses a long-spun spunbond nonwoven fabric and a method for producing the same, Filament spunbonded nonwoven fabric having a multi-layered structure in which the denier of constituent filaments becomes smaller toward the air outlet portion, and a method for producing the same. Korean Patent Registration No. 10-1194358 (Patent Document 3) discloses a polyester nonwoven fabric, The production method and the carpet bubbles containing it are called "polyester filaments having a fineness of 4 to 10 denier Wherein each polyester filament fiber comprises 70 to 95% by weight of the first polyester polymer having a melting point of 250 or more and 5 to 50% by weight of the second polyester polymer having a melting point lower than the first polyester polymer by at least 20, 30% by weight "based on the total weight of the nonwoven fabric.
However, the invention disclosed in the above Patent Document 1 has a problem in that when the ratio of the sheath is increased to about 50%, the strength can be increased, but the portion to be melt-bonded in the nonwoven fabric area is increased to have low permeability and low tear strength In the case of a multilayer structure, the pressure applied to the low-fineness portion is low and the permeability is low. The invention disclosed in Patent Document 3 simply raises the fineness. In this case, But the filtering effect is lowered. Therefore, there are many problems in use as a filter.
Therefore, the present inventors have found that, in the conventional polyester nonwoven fabric including the above-described invention, when a polyester nonwoven fabric is used for a filter, the nonwoven fabric has many improvements compared to conventional ones in terms of filtration effect and strength, Thereby completing the present invention.
SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a filtering method and a filament filter, which are capable of increasing the fineness of a filament, To provide a nonwoven fabric to be improved.
Another object of the present invention is to provide a nonwoven fabric having the above-described characteristics, which is improved in permeability and tear strength by increasing the tear strength by using an air through bonding method, To provide a nonwoven fabric which can be used as a nonwoven fabric.
Another object of the present invention is to provide a method for easily producing a nonwoven fabric having the above-mentioned characteristics with excellent productivity.
The present invention may also be directed to accomplish these and other objects, which can be easily derived by those skilled in the art from the overall description of the present specification, in addition to the above-mentioned and obvious objects.
In order to achieve the above object, the polyester nonwoven fabric having improved permeability of the present invention comprises:
A polyester nonwoven fabric produced by spinning a polyester polymer, drawing a filament through an ejector, forming a web on a conveyor belt by filament carding by collision of an impact plate, and bonding, wherein the polyester polymer has a melting point of 250 캜 And a low melting point polyester having a melting point of 230 DEG C or lower, wherein the ratio of the low melting point polyester is 10 wt% to 30 wt% based on the total weight of the total polyester polymer, and the density of the nonwoven fabric is Lt; 3 > to 1.0 g / cm < 3 >.
According to another aspect of the present invention, the nonwoven fabric has a fiber diameter of 25 mu m to 40 mu m.
According to still another aspect of the present invention, the nonwoven fabric is manufactured by an air through bond method in which fibers are melted by hot air to perform thermal fusion bonding.
According to another constitution of the present invention, the high melting point polyester is a polyester polymer including polyethylene terephthalate, polytrimethylene terephthalate and polybutylene terephthalate, and the low melting point polyester is obtained by using an isomer And is a polyester polymer containing polyethylene terephthalate, polytrimethylene terephthalate and polybutylene terephthalate whose melting point is lowered.
According to another aspect of the present invention, the structure of the fibers of the nonwoven fabric is characterized in that the high-melting-point polyester and the low-melting-point polyester fiber are mixed and radiated singly.
According to another embodiment of the present invention, the nonwoven fabric may have a structure in which a low-melting-point polyester and a high-melting-point polyester are spun in a sheath / core form.
According to another embodiment of the present invention, the air permeability of the nonwoven fabric is 100 to 500 ECS.
In the polyester nonwoven fabric having improved permeability as described above and the method for producing the same, the polyester polymer having a specific structure is used to increase the fineness of the filament, and the embossed portion is removed using the air permeable bonding method, The present invention provides a nonwoven fabric which can be usefully used as a PVD filter that has an effect of improving the tear strength and improving the densification while improving the filtration effect and preventing the tearing at the time of construction. It was solved.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a scanning electron microscope photograph of an 8-decaneed fiber of a polyester non-woven fabric having improved permeability prepared according to a preferred embodiment of the present invention,
2 is a scanning electron microscope (SEM) image of a polyester nonwoven fabric with improved permeability prepared according to a preferred embodiment of the present invention,
Figs. 3 and 4 are SEM micrographs of a polyester nonwoven fabric of a conventional polyester nonwoven fabric, and scanning electron microscope photographs of polyester nonwoven fabric in which an embossed pattern is formed.
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.
The term "nonwoven fabric " as used in the present invention means a web of fibers or filaments formed by means other than knitting or weaving and containing bonds between some or all of the fibers or filaments, May be formed by the same thermal, adhesive or mechanical means. Conventional nonwovens are formed by spunbond, meltblown, carding, wetting and air leaching processes.
FIG. 1 is a scanning electron microscope photograph of 8-degenerate fibers of a permeability-enhanced polyester nonwoven prepared according to a preferred embodiment of the present invention, and FIG. The surface of the polyester nonwoven fabric with improved permeability is a scanning electron micrograph,
According to a preferred embodiment of the present invention, a method for producing a polyester nonwoven fabric having improved permeability of the present invention is produced by spinning a polyester polymer, wherein the polyester polymer is a low melting polyester having a melting point of 230 캜 or less, A high melting point polyester having a melting point of 250 DEG C or higher is used together and the filament is separately spinned or spun in a sheath-core form to stretch the filament through the ejector, The web is formed into a web, the formed web is melted by hot air, and the fibers are thermally fused to form a nonwoven fabric sheet by an air through bond method to impart shape stability and mechanical strength.
According to another embodiment of the present invention, a polyester nonwoven fabric having improved permeability of the present invention is produced by spinning a polyester polymer, drawing a filament through an ejector, forming a web on a conveyor belt by filament carding by collision of an impingement plate Wherein the polyester polymer comprises a high-melting-point polyester having a melting point of 250 ° C or higher and a low-melting-point polyester having a melting point of 230 ° C or lower, wherein the ratio of the low- To 10% by weight to 30% by weight based on the total weight of the polymer, and the density of the nonwoven fabric may be from 0.3 g / cm3 to 1.0 g / cm3.
According to another preferred embodiment of the present invention, it is preferable that the nonwoven fabric has a fiber diameter of 25 mu m to 40 mu m. If the diameter of the nonwoven fabric is outside the range, it is not possible to satisfy both the tear strength of the nonwoven fabric and the parameters which may be inferior to the permeability.
According to another preferred embodiment of the present invention, the nonwoven fabric is manufactured by an air through bond method in which fibers are melted by hot air and heat-sealed. When a nonwoven fabric is formed into a sheet by a method using a conventional calendar embossed calender, it is not preferable because a desired function can not be obtained from the viewpoint of the filtration property by forming a heat-welded portion in many portions of the nonwoven fabric as shown in FIG. Particularly, according to the constitution of the present invention, the fineness of the filament fiber is processed as described above and processed by the air permeation bonding method to improve the permeability because there is no embossed portion. By increasing the density, the contact points between the fibers are increased, And the heavy material such as soil is filtered so that the water can be effectively filtered while not flowing out, which is useful as a PVD filter.
According to another preferred embodiment of the present invention, the high melting point polyester which can be used in accordance with the present invention is a polyester polymer comprising polyethylene terephthalate, polytrimethylene terephthalate and polybutylene terephthalate, The polyester is a polyester polymer containing polyethylene terephthalate, polytrimethylene terephthalate, and polybutylene terephthalate whose melting point is lowered by using an isomer upon polymerization.
According to another preferred embodiment of the present invention, the constitution of the fibers of the nonwoven fabric is such that the high-melting-point polyester and the low-melting-point polyester fiber are mixed and spun singly, or the constitution of the fibers of the nonwoven fabric is a low- And the high-melting-point polyester is spun in a sheath-core form.
According to another preferred embodiment of the present invention, the air permeability of the nonwoven fabric is from 100CCS to 500CCS.
The permeability-improving polyester nonwoven fabric having the above-described structure according to the present invention can improve the liquid permeability required by the PVD filter by setting the average diameter of the fibers constituting the nonwoven fabric to 25 μm or more and the density to 0.3 g / And heavy materials such as earth can provide an effect of being filtered and the air permeability can be improved from about 26CCS to more than 100CCS in the conventional nonwoven fabric and the effective pore size can be increased from 38μm to over 120μm.
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
Through the spinneret, composite spinning is performed through conjugate spinning at a mixing ratio of 80:20 of a high melting point polyethylene terephthalate (hereinafter referred to as PET) having a melting point of 255 ° C and a low melting point PET having a melting point of 220 ° C. The discharged fiber and the ejector pressure are adjusted so that the diameter of the fiber is 29 μm and the spinning speed is 4500 m / min. The fibers passed through the ejector are randomly stacked on a conveyor belt to form a nonwoven web. At this time, the speed of the conveyor belt is adjusted so that the unit weight is 100 g / m 2. The formed nonwoven web was passed through a calender roll to adjust its thickness to a density of 0.36 g / cm 3, passed through a drum dryer having an air temperature of 210 ° C., And the properties thereof were evaluated. The results are shown in Table 1. < tb > < TABLE >
Comparative Example 1
A nonwoven fabric was produced in the same manner as in Example 1, except that embossing was performed without going through a drum dryer.
Comparative Example 2
A nonwoven fabric was produced in the same manner as in Example 1 except that the density was reduced to 0.13 g / cm 3.
Comparative Example 3
A nonwoven fabric was produced in the same manner as in Example 1 except that the fiber diameter was changed to a level of 16 mu m.
Comparative Example 4
A nonwoven fabric was produced in the same manner as in Example 1 except that the raw material ratio of the high melting point PET and the low melting point PET was changed to 50:50.
Although the preferred embodiments of the polyester nonwoven fabric having improved permeability and the manufacturing method thereof have been described in the foregoing detailed description of the present invention, the content of the nonwoven fabric is not limited only to that described in the above embodiment, It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (7)
The polyester polymer includes a high-melting-point polyester having a melting point of 250 캜 or higher and a low-melting-point polyester having a melting point of 230 캜 or lower, wherein the ratio of the low-melting-point polyester is 10-30% by weight based on the total weight of the whole polyester polymer , The spinning speed during the composite spinning is set to be 4,500 m / min, the diameter of the fiber should be 25 to 40 μm,
After forming the web, the thickness of the nonwoven fabric was adjusted to 0.3 to 1.0 g / cm 3 by controlling the thickness of the web by passing through a calender roll. The nonwoven fabric was passed through a drum dryer having an air temperature of 210 ° C and processed by air through bonding By weight based on the total weight of the nonwoven fabric.
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| Application Number | Priority Date | Filing Date | Title |
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| KR1020170036837A KR101874742B1 (en) | 2017-03-23 | 2017-03-23 | The method for manufacturing Polyester nonwoven fabric having an improved permeability |
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| KR1020170036837A KR101874742B1 (en) | 2017-03-23 | 2017-03-23 | The method for manufacturing Polyester nonwoven fabric having an improved permeability |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20210020352A (en) * | 2019-08-14 | 2021-02-24 | 남양부직포 주식회사 | Air cleaner |
| WO2022145726A1 (en) * | 2020-12-30 | 2022-07-07 | 코오롱인더스트리 주식회사 | Non-woven fabric, carpet, and method for preparing same |
| KR20220097289A (en) * | 2020-12-30 | 2022-07-07 | 코오롱인더스트리 주식회사 | Spunbond non-woven and manufacturing method thereof |
| WO2022146005A1 (en) * | 2020-12-30 | 2022-07-07 | 코오롱인더스트리 주식회사 | Spunbonded non-woven fabric and manufacturing method therefor |
-
2017
- 2017-03-23 KR KR1020170036837A patent/KR101874742B1/en active IP Right Grant
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20210020352A (en) * | 2019-08-14 | 2021-02-24 | 남양부직포 주식회사 | Air cleaner |
| KR102231147B1 (en) | 2019-08-14 | 2021-03-23 | 남양부직포 주식회사 | Air cleaner |
| WO2022145726A1 (en) * | 2020-12-30 | 2022-07-07 | 코오롱인더스트리 주식회사 | Non-woven fabric, carpet, and method for preparing same |
| KR20220097289A (en) * | 2020-12-30 | 2022-07-07 | 코오롱인더스트리 주식회사 | Spunbond non-woven and manufacturing method thereof |
| WO2022146005A1 (en) * | 2020-12-30 | 2022-07-07 | 코오롱인더스트리 주식회사 | Spunbonded non-woven fabric and manufacturing method therefor |
| TWI807515B (en) * | 2020-12-30 | 2023-07-01 | 南韓商可隆工業股份有限公司 | Non-woven fabric, carpet and method for preparing the same |
| KR102558453B1 (en) | 2020-12-30 | 2023-07-21 | 코오롱인더스트리 주식회사 | Spunbond non-woven and manufacturing method thereof |
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