KR102022307B1 - Polypropylene spunbond nonwoven fabric and preparing method thereof - Google Patents
Polypropylene spunbond nonwoven fabric and preparing method thereof Download PDFInfo
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- KR102022307B1 KR102022307B1 KR1020130048173A KR20130048173A KR102022307B1 KR 102022307 B1 KR102022307 B1 KR 102022307B1 KR 1020130048173 A KR1020130048173 A KR 1020130048173A KR 20130048173 A KR20130048173 A KR 20130048173A KR 102022307 B1 KR102022307 B1 KR 102022307B1
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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
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/016—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the fineness
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
- D01D5/088—Cooling filaments, threads or the like, leaving the spinnerettes
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
- D01D5/098—Melt spinning methods with simultaneous stretching
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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
- D04H1/42—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
- D04H1/4282—Addition polymers
- D04H1/4291—Olefin series
-
- 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
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/005—Synthetic yarns or filaments
- D04H3/007—Addition polymers
-
- 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
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/02—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
- D04H3/03—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments at random
- D04H3/033—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments at random reorientation immediately after yarn or filament formation
-
- 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
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
- D04H3/16—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic filaments produced in association with filament formation, e.g. immediately following extrusion
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Nonwoven Fabrics (AREA)
Abstract
The present invention relates to a fine-grained polypropylene spunbond nonwoven fabric and a method for producing the fine-grained polypropylene spunbond nonwoven fabric, wherein the fine-grained polypropylene spunbond nonwoven fabric of the present invention has a fineness of 1.5 denier or less of the fineness of fibers constituting the nonwoven fabric. In the method for producing a spunbond nonwoven fabric, the method of making the fineness of the fiber to be 1.5 denier or less uses a polypropylene resin having a melt index of 20 to 200 g / 10 minutes, and the hole of the nozzle through which the molten resin is discharged. The diameter is 0.45 to 0.75 pi (φ), the number of holes of the nozzle at this time is used to 4,000 to 8,000 holes (Holes) / m, and the cooling in the stretching section is divided into the upper and lower cooling, at this time cooling The amount of air is adjusted according to the amount and the degree of stretching of the polymer discharged with 10 to 30% of the total amount of air at the top and 90 to 70% at the bottom. The air temperature of the chamber is set higher than the air temperature of the lower chamber to suppress rapid quenching due to the high-speed radiation, and after drawing by polymer self-weight, increase the air velocity in the lower chamber section to increase the crystallinity through secondary cooling. It is characterized by being composed of fibers of 1.5 denier or less by increasing the drawing speed.
The method for producing a fine-grained polypropylene spunbond nonwoven fabric of the present invention configured as described above is made by spinning a polypropylene having a specific melt index using a constant nozzle hole and adjusting the ratio and temperature of the amount of air in the cooling chamber. The present invention provides a method for producing a fine filament yarn that can produce a nonwoven fabric having excellent air density and increased fiber strength without trimming, and a fine fine polypropylene spunbond manufactured thereby. .
Description
The present invention relates to a fine-grained polypropylene spunbond nonwoven fabric and a method for manufacturing the same. More specifically, the fine-grained fine polypropylene spun-bonded spun polypropylene spun is excellent in texture and has excellent productivity without trimming due to increased air density and fiber strength. A nonwoven fabric and a method of manufacturing the same.
Generally, polypropylene is used as a raw material for spunbonded nonwoven fabrics. This is because polypropylene has not only easy supply for general use and processability suitable for producing products, but also suitable physical properties and feel for use. Because it is excellent. In particular, more than 70% of the polypropylene spunbond nonwoven fabric having the above characteristics is applied to the sanitary material by soft touch and clean hygienic properties. As the properties required for the sanitary material, softness, airtightness, mechanical strength, and the like may be mentioned. In order to satisfy these properties, it is necessary to become a finer polypropylene nonwoven fabric as a technical advance.
These fine-grained nonwoven fabrics have increased pore density due to the increase in the number of fibers per unit area compared to the existing fineness, and increase the air density, and also increase the fiber strength due to the increase of the filament drawing, thus increasing the strength of the nonwoven fabric. It is characterized by an increase in strength. In particular, as the fiber becomes finer, softness is also improved by providing a softer feel to humans, and the development thereof has been progressed. For example, US Pat. No. 4,707,524 and US Pat. No. 6,235,664 describes fine-grained polypropylene nonwovens.
However, in order to reduce the fineness of less than 1.5 denier in the conventional spunbonded nonwoven fabric, it is generally possible to use a high-stretching raw material or to lower the discharge amount. However, this restriction is caused by the decrease in productivity and the use of expensive raw materials. New problems such as an increase in production costs have arisen. In order to solve this problem, U.S. Patent No. 2012 / 0,116,338 proposed to refine the fineness through high stretching, but for this purpose, the fiber stretching is excessively applied, and thus the fiber is broken (cut off) during spinning. There is a problem that the stable production is difficult.
Therefore, the present inventors have recognized the above-mentioned problems in the prior art and have studied diligently for a method for producing a fine-grained polypropylene spunbond nonwoven fabric which has excellent productivity without trimming without lowering the discharge amount without using expensive fuel. The present invention was completed.
Accordingly, the present invention has been made in view of the above technical problems in the prior art, and the main object of the present invention is a fine-grained polypropylene spun which has excellent productivity since trimming does not occur without lowering the discharge amount while using ordinary fuel. It is to provide a method for producing a bonded nonwoven fabric.
Another object of the present invention is to provide a fine-grained polypropylene spunbond nonwoven fabric obtained by the above production method.
The present invention may also be directed to achieving other objects in addition to the above-described specific objects that may be readily derived by one of ordinary skill in the art from the general description of this specification.
The object of the present invention described above is a commercially applied polypropylene 1.5 denier using a raw material having a molecular weight distribution of at least 4 and a melt index of 20 to 60 g / 10 min. In production, it is possible to fine-tune the crystallization and elongation of fibers by controlling the air flow rate and temperature by dividing the shape and the fiber elongation section suitable for the fineness of the nozzle hole (Hole) from which the polymer is discharged into one or more parts in the prior art. This is achieved by giving conditions suitable for.
Stretching of the spunbond nonwoven is performed aerodynamically downwardly and the filament velocity is predicted by the applied air pressure. At this time, the air pressure is expressed by the pressure of the closed space (Cabin Pressure) and in the present invention, the stretching by the speed of the filament is represented by the cabin pressure.
The fine-grained polypropylene spunbond nonwoven fabric of the present invention for achieving the above object is:
In the method for producing a polypropylene spunbond nonwoven fabric having a fineness of the fibers constituting the nonwoven fabric to 1.5 denier or less,
The method of making the fineness of the fiber to be 1.5 denier or less uses a polypropylene resin having a melt index of 20 to 200 g / 10 minutes, and the diameter of the hole of the nozzle through which the molten resin is discharged is 0.45 to 0.75 pi (φ). In this case, the number of holes in the nozzle is 4,000 to 8,000 holes (Holes) / m, and the cooling in the stretching section is divided into the upper and lower cooling, wherein the amount of cooling air is 10 to 30% of the total amount of air It adjusts according to the amount and the degree of stretching of the polymer discharged in the upper part and 90 to 70% as the lower part, and set the air temperature of the upper chamber higher than the air temperature of the lower chamber to suppress the rapid cooling due to the high-speed radiation, After drawing by polymer self-weight, increase the air velocity in the lower chamber section to increase the crystallinity and improve the drawing speed through the secondary cooling to fiber less than 1.5 denier It characterized in that the property to be.
According to another configuration of the present invention, the polypropylene resin is mixed in a ratio of 1 to 30 parts by weight of a polypropylene raw material having a melt index of 60 to 200 g / 10 minutes to 100 parts by weight of a polypropylene raw material having a melt index of 20 to 60 g / 10 minutes It is characterized by radiation.
According to another configuration of the present invention, it is characterized in that the nozzle number of 6000 to 7000 holes (Holes) / m and the air pressure of the cabin is 4500 to 7000 Pa to produce a fineness of 0.6 to 1.3 denier
According to another configuration of the present invention, the melt index of the polypropylene resin is 34g / 10 minutes and the discharge number of 180 to 250kg / h in the range of the odd number of nozzles 5000 to 7000 holes (Holes) / m characterized in that to use do.
According to another configuration of the present invention, the ratio of the air volume and the temperature of the cooling chamber is adjusted so that the pressure of the drawn air is set to a level of 5000 Pa or more to be composed of fibers of 1.3 denier or less.
Sefine polypropylene spunbond nonwoven fabric of the present invention for achieving the above another object is:
The fineness of the fibers constituting the nonwoven fabric is composed of 1.5 denier or less,
The method of making the fineness of the fiber to be 1.5 denier or less uses a polypropylene resin having a melt index of 20 to 200 g / 10 minutes, and the diameter of the hole of the nozzle through which the molten resin is discharged is 0.45 to 0.75 pi (φ). In this case, the number of holes in the nozzle is 4,000 to 8,000 holes (Holes) / m, and the cooling in the stretching section is divided into the upper and lower cooling, wherein the amount of cooling air is 10 to 30% of the total amount of air It adjusts according to the amount and the degree of stretching of the polymer discharged in the upper part and 90 to 70% as the lower part, and set the air temperature of the upper chamber higher than the air temperature of the lower chamber to suppress the rapid cooling due to the high-speed radiation, After drawing by polymer self-weight, increase the air velocity in the lower chamber section to increase the crystallinity and improve the drawing speed through the secondary cooling to fiber less than 1.5 denier It characterized in that is manufactured to be sex.
The method for producing a fine-grained polypropylene spunbond nonwoven fabric of the present invention configured as described above is made by spinning a polypropylene having a specific melt index using a constant nozzle hole and adjusting the ratio and temperature of the amount of air in the cooling chamber. The present invention provides a method for producing a fine filament yarn that can produce a nonwoven fabric having excellent air density and increased fiber strength without trimming, and a fine fine polypropylene spunbond manufactured thereby. .
Hereinafter, the present invention will be described in more detail with reference to preferred embodiments, but it will be apparent to those skilled in the art that various modifications and variations are possible within the scope of the technical idea of the present invention, and such modifications and modifications belong to the appended claims. will be.
The method for producing a fine-grained polypropylene spunbond nonwoven fabric according to the present invention is a method for producing a polypropylene spunbond nonwoven fabric having a fineness of fibers constituting the nonwoven fabric of 1.5 denier or less, and having a fineness of fiber of 1.5 denier or less. Here's how:
Using a polypropylene resin having a melt index of 20 to 200 g / 10 minutes, the diameter of the hole of the nozzle discharged after melting these resins is 0.45 to 0.75 pi (φ). At this time, the number of holes of the nozzle may be used that is 4,000 to 8,000 holes (Holes) / m.
According to a preferred embodiment of the present invention, the polypropylene resin is mixed in a ratio of 1 to 30 parts by weight of polypropylene raw material having a melt index of 60 to 200 g / 10 minutes to 100 parts by weight of polypropylene raw material having a melt index of 20 to 60 g / 10 minutes. Can be radiated.
According to another embodiment of the present invention, the fineness of 0.6 to 1.3 deniers can be produced by making the number of nozzles 6000 to 7000 holes (Holes) / m and the air pressure of the cabin to 4500 to 7000 Pa.
The design technique of the nozzles used for the production of the fine-grained polypropylene nonwovens according to the invention described above specifically applies to the application of nozzle holes (parts where the molten polymer is discharged through the flow path) suitable for polypropylene spunbond fineness. For the L / D (the ratio of the diameter and the length of the hole) is 2 to 6, more preferably 3 to 5, and most preferably can be designed to 4, so in the present invention designed to 4, the The diameter ranges from 0.45 to 0.75 pi, more preferably from 0.50 to 0.65, most preferably from 0.55 to 0.60, and the number of holes is 4000 to 8000 holes / m per unit area, preferably 6000 to By increasing the diameter and the number of holes (Hole) to 7000 holes / m, the amount of discharge per unit hole can be made small and the fineness can be progressed.
In the most preferred embodiment of the present invention, the nonwoven fabric can be produced with the number of nozzles in the range of 5000 to 7000 holes (Holes / m) in the range of 34 g / 10 minutes of melt index of polypropylene resin and 180 to 250 kg / h of discharge amount. Can be.
Next, the cooling in the stretching section can be divided into upper and lower parts for cooling. At this time, the amount of cooling air is adjusted according to the amount and stretching degree of the polymer discharged with 10 to 30% of the total amount of air in the upper portion and 90 to 70% in the lower portion, and the air temperature of the upper chamber is higher than the air temperature of the lower chamber. Set high to suppress rapid quenching due to high-speed spinning, increase the air velocity in the lower chamber section after stretching by polymer self-weight, increase the crystallinity through secondary cooling, and improve the stretching speed. It can be done.
The crystallization and stretching technique according to the present invention described above in detail, the cooling of the polymer in the conventional conventional spunbond nonwoven fabric manufacturing method is a method of cooling by dividing only up and down in both quenching chamber (Q / Chamber) When the polymer flow rate for the fineness is increased, the polymer trimming (cutting) occurs due to the quenching, but the above-described configuration of the present invention rapidly reduces the amount of cooling air at the upper side, thereby suppressing quenching and preventing the trimming. By the maximum stretching, instead of increasing the amount of cooling air to the lower side through the secondary cooling to increase the crystallinity and to increase the drawing speed is configured to achieve finer fineness.
Hereinafter, an Example demonstrates this invention in more detail. The following examples and comparative examples illustrate the present invention more specifically, but do not limit the scope of the present invention. Various properties and physical properties in the Examples and Comparative Examples were measured and evaluated by the following method:
(1) weight: EDANA40.8-90
(2) Tensile strength: EDANA20.2-89
(3) Lecture degree: EDANA 50.5-99
Example 1
The polypropylene resin is melted in the extruder using a raw material having a melt flow index (MI) of 34 g / 10 minutes and the number of nozzles for discharging the polymer is 6700 holes / m and the diameter of the holes is 0.56 pie. The air chamber to cool during spinning is divided into upper and lower parts, and the amount of air given at this time is 30% in the upper part, 70% in the lower part, and the air temperature is 20 ° C in the upper part and 18 ° C in the lower part. In the lower part accelerates secondary crystallization and filament speed. At this time, the discharge amount is 220kg / hr, filament stretching cabin pressure is 4500Pa to lay a web on the spin belt is drawn and continuously moved to make SSSS 13gsm spunbond nonwoven fabric by thermocompression bonding.
Example 2
In Example 1 above, a raw material having a melt flow index (MI) of 34 g / 10 minutes was used. The same process was conducted except that the filament stretching cabin pressure was 5500 Pa.
Example 3
In Example 1, when the raw material having a melt flow index (MI) of 60 g / 10 min in the polypropylene resin was used, all proceeded in the same manner except that the filament stretching cabin pressure was 6500 Pa.
Comparative Example 1
The raw materials used in Example 1 were the same, the number of nozzles was 5000 holes / m, the hole diameter was 0.6 pie, the air pressure in the air chamber of the cooling air was the same in the upper and lower chambers, and the temperature of the air was 18 ° C. Proceeded. The cabin pressure of the filament at this time was 5500 Pa.
Comparative Example 2
The raw material used in Example 3 above is a raw material having a melt index of 60 g / 10 minutes, an odd number of nozzles of 6700 holes / m, a diameter of 0.6 pie, and the air pressure of the air chamber of cooling air is given equally to the upper and lower chambers. The temperature was advanced to 18 ° C. The cabin pressure of the filament at this time was 6500 Pa.
(de ')
(kg / 5cm)
(kg / 5cm)
(%)
(%)
(mm)
* Lecture is softer as the number is lower.
The present invention described above is not limited to the above-described embodiments, and various substitutions, modifications, and changes can be made without departing from the technical spirit of the present invention. It will be obvious to him.
Claims (6)
It is possible to achieve finer fineness without using expensive, high-stretching raw materials and without lowering the discharge amount.
Raw materials of the nonwoven fabric, nozzle conditions for discharging the polymer, chamber structure and cooling conditions for polymer cooling, and cabin pressure conditions related to the filament discharge amount are organically combined,
First, commercially applicable polypropylene resin is used for the nonwoven material, but a molecular weight distribution of 4 or less and a melt flow index of 20 to 60 g / 10 minutes are used.
The nozzle has a L / D (ratio of hole diameter and length) of 2 to 6, a hole diameter of 0.45 to 0.75 pi (φ), and the number of holes per unit area is 4,000 to 8,000 holes (Holes) / m,
The polymer cooling is performed separately by using the chamber divided into upper and lower sides, but the cooling air amount is discharged from 10 to 30% of the total air volume in the upper portion and 70 to 90% in the lower portion, and the air temperature of the upper chamber is By setting it higher than the air temperature, the rapid cooling due to the high-speed radiation is suppressed, the stretching by the polymer self-weight is increased, the air velocity is increased in the lower chamber section, the secondary cooling,
Cabin pressure in a closed space is 4,500 to 17,000 Pa method for producing a fine-grained polypropylene spunbond nonwoven fabric.
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| Application Number | Priority Date | Filing Date | Title |
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| KR1020130048173A KR102022307B1 (en) | 2013-04-30 | 2013-04-30 | Polypropylene spunbond nonwoven fabric and preparing method thereof |
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| KR1020130048173A KR102022307B1 (en) | 2013-04-30 | 2013-04-30 | Polypropylene spunbond nonwoven fabric and preparing method thereof |
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| KR20140129634A KR20140129634A (en) | 2014-11-07 |
| KR102022307B1 true KR102022307B1 (en) | 2019-09-18 |
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| CN111212939B (en) * | 2017-10-17 | 2022-08-02 | 东丽株式会社 | Spun-bonded non-woven fabric |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4707524A (en) | 1986-05-06 | 1987-11-17 | Aristech Chemical Corporation | Controlled-rheology polypropylene |
| US6235664B1 (en) | 1997-03-04 | 2001-05-22 | Exxon Chemical Patents, Inc. | Polypropylene copolymer alloys for soft nonwoven fabrics |
| US20060040008A1 (en) * | 2004-08-20 | 2006-02-23 | Reifenhaeuser Gmbh & Co. Kg Maschinenfabrik | Device for the continuous production of a nonwoven web |
| CN102300883B (en) | 2009-01-29 | 2014-08-20 | 埃克森美孚化学专利公司 | Polypropylene Nonwoven Fibers And Fabrics And Methods For Making Same |
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