KR20170036314A - Spunbond nonwoven fabric having an excellent mobility and manufacturing method thereof - Google Patents

Spunbond nonwoven fabric having an excellent mobility and manufacturing method thereof Download PDF

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KR20170036314A
KR20170036314A KR1020150135327A KR20150135327A KR20170036314A KR 20170036314 A KR20170036314 A KR 20170036314A KR 1020150135327 A KR1020150135327 A KR 1020150135327A KR 20150135327 A KR20150135327 A KR 20150135327A KR 20170036314 A KR20170036314 A KR 20170036314A
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South Korea
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nonwoven fabric
polyolefin
fiber
present
mobility
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KR1020150135327A
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Korean (ko)
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KR101776400B1 (en
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이문복
서형민
윤영일
이주용
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도레이첨단소재 주식회사
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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
    • D04H1/544—Olefin series
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • 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
    • 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
    • D04H1/541—Composite fibres, e.g. sheath-core, sea-island or side-by-side; Mixed fibres
    • 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

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

The present invention relates to a mobility-ensuring spunbond nonwoven fabric and a method for manufacturing the same. The mobility-ensuring spunbond nonwoven fabric according to the present invention is excellent in dimensional stability because it is manufactured by thermal compression of a fiber in which a polyolefin-based random copolymer 40 to 50 g per 10 minutes in meltflow index (MI), 0.830 to 0.930 g per cubic centimeter in density, 45 to 110 degrees Celsius in melting point, and 60 J per gram or less in heat of fusion forms its core portion as A component and a polyolefin-based homopolymer 30 to 40 g per 10 minutes in meltflow index (MI), 0.850 to 0.950 g per cc in density, 160 to 170 degrees Celsius in melting point, and 80 J per gram or less in heat of fusion forms its sheath portion as B component constituting its surface. The mobility-ensuring spunbond nonwoven fabric according to the present invention that has the configuration described above and the method for manufacturing the mobility-ensuring spunbond nonwoven fabric according to the present invention described above adopt bicomponent spinning and the polyolefin-based raw materials, the elastic raw material is applied to the core portion of the fiber, and the general polypropylene raw material is applied to the sheath portion. Accordingly, its spinnability and the windability of the nonwoven fabric web in the thermal compression process are improved, resulting in excellent elasticity and allowing commercial production. The mobility-ensuring spunbond nonwoven fabric excellent in recovery from biaxial stretching by means of spunbonding is provided as an elastic nonwoven fabric dealing with the above-described problems of the related art.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spunbond nonwoven fabric having an excellent mobility and a manufacturing method thereof,

The present invention relates to a spunbonded nonwoven fabric having secured mobility and a method for producing the same. More particularly, the present invention relates to a spunbonded nonwoven fabric obtained by applying an elastic raw material to a fiber core portion and a general polypropylene raw material to a core portion by using a polyolefin- A spun bond nonwoven fabric having improved mobility and excellent biaxial elongation recovery rate by using a spun bond method as a stretchable nonwoven fabric capable of commercial production with excellent stretchability by improving the winding property of a nonwoven web during a spinning process, .

BACKGROUND ART [0002] Nonwoven fabrics have been used for various purposes in various fields such as sanitary, medical, agricultural or industrial use by changing their physicochemical properties. Particularly recently, And nonwoven fabrics. These nonwoven fabrics need to be stretched according to the movements of the body, and soft and soft feelings are continuously required to be improved upon contact with the skin.

Therefore, Korean Patent Laid-Open Publication No. 2009-0128481 discloses a method of stretching a stretchable nonwoven fabric sheet, which is obtained by laminating stretchable fibers and stretchable fibers by lamination and self-fusion by softening or melting, , 2007-7014056 discloses a method of forming and stretching a crosslinked elastic film layer from a thermoplastic styrene block copolymer and then bonding it to one or more nonwoven webs by a stretch-bonded laminate method Thereby imparting elasticity to the nonwoven fabric.

However, in the case of the above-mentioned prior art, since it is possible to stretch only in the uniaxial direction, and in the case of the laminate method, the adhesive treatment must be performed in order to impart the adhesive property to other materials, .

In view of the above-mentioned problems, there has been studied a method for producing an elastic physical property by introducing a suitable elastic raw material in a method of manifesting elastic properties. For example, Korean Patent Laid-Open Publication No. 2005-0088361 discloses a thermoplastic poly Discloses a method for producing a stretchable fiber by spunbonding a polymer containing a urethane elastomer. However, the polyurethane resin has a peculiar odor, and yellowing phenomenon occurs over time, which is not practical.

For example, Korean Patent Laid-Open Publication No. 2007-0085091 discloses a method for improving the contact feeling of a nonwoven fabric with respect to skin. For example, Korean Patent Publication No. 2007-0085091 discloses a method for improving the contact feeling of a nonwoven fabric with an ethylene-octene-based elastomer, a thermoplastic polyethylene (PE) PP) is used as a raw material to produce fibers and webs having a non-tacky feel using the two-component composite spinning technique. However, in the case of the elastic raw material used in the above method, the pressure on the spinning nozzle during production is increased due to high viscosity and melt elasticity at high temperature, resulting in various problems such as reduced productivity in long-term continuous production, and also in terms of raw material cost There is a disadvantage that the commerciality is poor. Further, in the case of the ethylene-octene-based elastomer, in the application of the disposable hygiene product, the deformation is large due to the increased load during urination or bowel movement of the user, that is, the low external load, Or the fit property is deteriorated. As another example, Korean Patent Laid-Open Publication No. 2010-0080625 discloses a nonwoven fabric using a propylene-based elastomer polymer, wherein 30% by weight of erucamide and 70% by weight of propylene Based elastomeric polymer is used to lower the adhesive texture of the elastic raw material. However, also in the above-mentioned technique, there is a problem in that it is impossible to increase the elastic raw material content according to the high content of the slurry agent, erucamide, so that it is impossible to exhibit excellent stretchability as elastic properties.

The inventors of the present invention have made intensive studies to solve the above-mentioned conventional problems. As a result, the inventors of the present invention have found that a polyolefin random copolymer having high fluidity is used as the center of the fiber and a thermoplastic polyolefin is used for the outer portion thereof, The present invention has been accomplished on the basis of these findings.

Patent Document 1: Korean Patent Laid-Open Publication No. 2009-0128481 Patent Document 2: Korean Patent Application Publication No. 2007-7014056 Patent Document 3: Korean Patent Laid-Open Publication No. 2005-0088361 Patent Document 4: Korean Patent Publication No. 2007-0085091 Patent Document 5: Korean Patent Laid-Open Publication No. 2010-0080625

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a nonwoven fabric for hygienic use such as a stretchable article, To provide a nonwoven fabric capable of commercial production by improving the winding property of a nonwoven web during a spinning process and a spinning process.

Another object of the present invention is to provide a spunbonded nonwoven fabric having excellent mobility with excellent biaxial stretch recovery using a spunbond method.

It is still another object of the present invention to provide a method for easily producing a nonwoven fabric having the above properties 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.

It is an object of the present invention to provide a nonwoven fabric which can improve the flexibility and softness of a nonwoven fabric web by applying a different raw material to the core and the core of the fiber using a polyolefinic raw material and a bicomponent spinning method, Respectively.

A polyolefin random copolymer having a melt index (MI) of 40 to 50 g / 10 min, a density of 0.830 to 0.930 g / cm 3, a melting point of 45 to 110 캜, and a heat of fusion of 60 J / g or less, Having a melting point (MI) of 30 to 40 g / 10 min, a density of 0.850 to 0.950 g / cc, a melting point of 160 to 170 캜, and a heat of fusion of 80 J / g or less, wherein the polyolefin- Is a component B constituting the surface of the fiber, and the fiber forming the sheath portion of the fiber is thermally bonded by thermoforming to have excellent shape stability.

According to another aspect of the present invention, the proportion of the polyolefin random copolymer in the core portion is 5 to 12 wt% of polyethylene derived from ethylene or non-propylene -olefin.

According to another embodiment of the present invention, the polyolefin-based homopolymer of the sheath portion is characterized by being polypropylene.

According to another embodiment of the present invention, the polyolefin-based random copolymer forming the core portion and the polyolefin-based homopolymer forming the sheath portion have a MI of at least 40 g / 10 min or more in the polyolefin random copolymer The polyolefin-based homopolymer is characterized in that the MI is not more than 40 g / 10 min at the maximum, and the difference in MI between the two polymers is at least 10 g / min or more.

According to another aspect of the present invention, the ratio of the sheath portion and the core portion is in the range of 10/90 to 50/50 in terms of the sheath portion / core portion ratio based on the total weight of the fiber.

According to another embodiment of the present invention, the B component is characterized in that 1 to 3% by weight of erucamide is added to the polyolefin-based homopolymer.

According to another embodiment of the present invention, the nonwoven fabric is characterized by having a permanent strain of not more than 20% when measured using a 100% 1-cycle hysteresis test.

According to another embodiment of the present invention, the nonwoven fabric is characterized by having an elastic modulus in the MD direction of 0.2 to 1.5 kg / mm 2 when measured using a 100% 1-cycle hysteresis test.

According to another embodiment of the present invention, the nonwoven fabric has a basis weight of 10 to 200 g / m 2 and a fiber diameter of 12 to 32 μm.

To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, there is provided a method of manufacturing a spunbonded nonwoven fabric,

a) A polyolefin random copolymer having a melt index (MI) of 40 to 50 g / 10 min, a density of 0.830 to 0.930 g / cm 3, a melting point of 45 to 110 캜, and a heat of fusion of 60 J / And feeding it to the extruder:

b) a polyolefin-based homopolymer having a melt index (MI) of 30 to 40 g / 10 min, a density of 0.850 to 0.950 g / cc, a melting point of 160 to 170 캜 and a heat of fusion of 80 J / g or less, : ≪ / RTI &

c) coextruding components A and B from each extruder as a melt to form a core portion of the fiber and a sheath portion of the fiber to form a plurality of fibers;

d) Quenching the fiber at an appropriate temperature:

e) stretching the quenched fiber:

f) forming webs of said fibers on specially shaped surface belts:

g) imparting shape stability to the web by thermocompression; and

h) winding the web at a predetermined winding speed.

According to another aspect of the present invention, the ratio of the sheath portion and the core portion is set such that the sheath portion / core portion ratio ranges from 10/90 to 50/50 based on the total weight of the fiber.

According to another embodiment of the present invention, the quenching temperature is set to 14 to 18 占 폚.

According to another aspect of the present invention, the thermocompression bonding is characterized by embossed bonding by patterned rolls.

According to another embodiment of the present invention, the thermocompression bonding is an emboss roll having an adhesive area of 10 to 20% on one side and a bonding roll composed of a swimming roll having a smooth surface on the other side. Characterized in that it is carried out at a temperature of from 80 캜 to 120 캜 using a calender.

According to another aspect of the present invention, the predetermined winding speed is reduced to 80 to 99% of the rotation of the embossing roll.

In order to achieve the other object of the present invention, the elastic spunbonded nonwoven fabric laminate of the present invention is a laminate of a spunbonded nonwoven fabric having the above-described constitution and ensured in mobility, and includes a melt spinning, And is obtained through processing.

In order to accomplish another object of the present invention, the fiber product of the present invention is characterized in that the stretchable spunbonded nonwoven fabric laminate having the mobility secured according to the present invention described above is used for the stretching member.

In order to achieve the other object of the present invention, the sanitary napkin product of the present invention is characterized in that a stretchable spunbonded nonwoven fabric laminate having mobility secured according to the present invention as described above is used as a stretch member to form a topsheet, Side gauges, waist bands, and side panels, as shown in FIG.

In order to achieve the other object of the present invention, the adult diaper product of the present invention is a diaper comprising a topsheet, a backsheet, and a backsheet using the stretchable spunbonded nonwoven fabric laminate having mobility secured according to the present invention, A sideband, a waistband, and a sidepanel, as shown in FIG.

In order to achieve the other object of the present invention, the ladies' product of the present invention comprises a stretchable spunbonded nonwoven fabric laminate having mobility secured according to the present invention described above as a stretching member to form a topsheet, a backsheet, Sidere gater (Sidegater), and SAP sheet (Sheet).

In order to accomplish another object of the present invention, a medical product according to the present invention is characterized in that a stretchable spunbonded nonwoven fabric laminate having mobility according to the present invention is used as a stretching member, A muscle tape, a wound dressing, and a medical band.

The spunbonded nonwoven fabric having the above-mentioned mobility secured according to the present invention and the method of manufacturing the same according to the present invention can be produced by applying an elastic raw material to a fiber core portion and a general polypropylene raw material to a core portion by using a polyolefin- A spunbond nonwoven fabric having improved stretchability and commercial production by improving the winding property of the nonwoven web during the thermocompression bonding process and using the spunbond method to provide a spunbonded nonwoven fabric having excellent biaxial stretch recovery and excellent mobility, Respectively.

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.

According to a preferred embodiment of the present invention, the spun-bonded nonwoven fabric having the mobility of the present invention has a melt index (MI) of 40 to 50 g / 10 min, a density of 0.830 to 0.930 g / A melt index (MI) of 30 to 40 g / 10 min and a density of 0.850 to 0.950 g / cc A polyolefin-based homopolymer having a melting point of 160 to 170 DEG C and a heat of fusion of 80 J / g or less is a B component constituting the fiber surface, and the fiber forming the sheath portion of the fiber is thermally bonded By using the core-sheath type fibers according to the specific constitution of the present invention as described above, the spinnability is improved at the same time as the elasticity and the spinnability.

According to another preferred embodiment of the present invention, the proportion of the polyolefin random copolymer in the core portion preferably comprises 5 to 12 wt% of polyethylene derived from ethylene or non-propylene -olefin. By such a constitution, the fibers and the nonwoven fabric produced thereby can have excellent stretchability.

According to another preferred embodiment of the present invention, the polyolefin-based homopolymer of the sheath portion is preferably made of polypropylene though not limited thereto. Such a polymer has a melting point of 160 to 170 캜, which enables the nonwoven web to have a strong bonding force during the thermocompression bonding process after melt spinning, so that it has excellent shape stability and mobility can be secured.

According to another preferred embodiment of the present invention, the polyolefin-based random copolymer forming the core portion and the polyolefin-based homopolymer forming the sheath portion are formed so that the MI of the polyolefin-based random copolymer is at least 40 g / 10 min And the polyolefin-based homopolymer having a MI of not more than 40 g / 10 min at the maximum is preferably used so that the MI difference between the two polymers is at least 10 g / min or more.

According to another preferred embodiment of the present invention, the ratio of the sheath portion and the core portion is 20/80 to 50/50 in terms of the sheath / core portion ratio, based on the total weight of the fiber, It is preferable to add 1 to 3% by weight of erucamide to the polyolefin-based homopolymer. By the administration of the erucamide, it is possible to provide a long-fiber nonwoven fabric having improved rubber feel and soft feel. Most preferably, it is composed of 75% by weight of an elastic raw material forming the core portion and 22 to 24% by weight of a general polypropylene forming a sheath portion, wherein 1 to 3% by weight of erucamide can be added.

According to another preferred embodiment of the present invention, the nonwoven fabric has a permanent strain of not more than 20% when measured using a 100% 1-cycle hysteresis test, and the nonwoven fabric is subjected to a 100% 1-cycle hysteresis test It is preferable that the elastic modulus with respect to the MD direction is 0.2 to 1.5 kg / mm < 2 >.

According to another preferred embodiment of the present invention, it is preferable that the nonwoven fabric has a basis weight of 10 to 200 g / m 2 and a fiber diameter of 12 to 32 탆.

Hereinafter, the manufacturing process of the nonwoven fabric having the above-mentioned constitution securing the mobility according to the present invention will be described in detail.

A polyolefin random copolymer having a melt index (MI) of 40 to 50 g / 10 min, a density of 0.830 to 0.930 g / cm 3, a melting point of 45 to 110 캜, and a heat of fusion of 60 J / g or less is used as component A , A melt index (MI) of 30 to 40 g / 10 min, a density of 0.850 to 0.950 g / cc, a melting point of 160 to 170 DEG C and a heat of fusion of 80 J / g or less as a component B, The A component is fed to the extruder from a first hopper (HOPPER) and optionally the polymer B component is fed from a second hopper (HOPPER) to the extruder. The molten constituent polymer is transferred from the individual extruder through each polymer conduit to the spin beam. The form of the spinnerette for spinning bicomponent filaments is known to those skilled in the art and is therefore not described in detail in the present invention. The filaments then radiated adjacent to the curtains of the filaments extending from the process line spinneret are then solidified by cooling air injected through the honeycomb cooling chamber.

According to one embodiment of the present invention, when producing the multi-component filament composed of the A-component polymer of the core portion and the B-component polymer of the sheath portion, it is preferable that the temperature of the cooling chamber portion is controlled to be low. This is because when the temperature is above a certain level, the filaments stick to the cooling chamber, which hinders the continuous production of the sheet, and the stretching is not sufficient and the physical properties are greatly reduced. Accordingly, the temperature of the chamber portion is 10 to 20 占 폚, preferably 12 to 18 占 폚, and most preferably 14 to 16 占 폚.

The filaments discharged from the spinning nozzles are stacked at a constant weight on a porous special conveyor belt which is stretched by the pressure of the air blown from the upper part and the air sucked from the lower part of the conveyor belt in the case of the cooling chamber cooling air, . In the present invention, the nonwoven fabric having secured mobility is preferably a composite spunbond long-fiber nonwoven fabric having a basis weight of 10 to 200 g / m 2 and a fiber diameter of 12 to 32 탆.

The laminated nonwoven fabric is thermally bonded to impart mechanical properties and shape stability. In other words, heat and pressure are imparted through the thermal calender roll, and heat-adhered and sheeted. At this time, the constitution of the calender roll does not limit the area of the adhesive, but one of them may be composed of an embossed roll face having an adhesive area of usually 10 to 20%, and the other may be a smooth face roll. When the temperature of the roll exceeds a certain level, the sheet is thermally fused to the heating roll, so that the sheet can not be produced. If the temperature is too low, the physical properties of the sheet are lowered. Therefore, according to a preferred embodiment of the present invention, the thermal temperature of the roll is preferably 80 ° C to 120 ° C, more preferably 90 ° C to 110 ° C.

In addition, excessive pressure of the rolls needs to be controlled to a certain level or less because the soft sheet is fused to the rolls.

After thermally adhered as described above, the web is wound using a winder for blowing the nonwoven fabric. In this case, the extensibility of the nonwoven fabric is increased due to the characteristics of the B polymer in the core portion, so that the winding speed of the winder is faster than the speed of the embossing roll for thermally adhering the nonwoven fabric. So that it becomes undesirable. Therefore, the winding speed of the winder must be lowered at a rate of preferably 80 to 99%, more preferably 85 to 97%, and most preferably 87 to 95% with respect to the embossing roll rotation speed.

As the raw material used in the present invention, a propylene elastomer polymer having a melt index (MI) of 48 g / 10 min and a density of 0.860 to 0.870 at 230 DEG C can be used as the elastic copolymer, especially in Exxonmobil.

At this time, the composition ratio of the polypropylene which is the sheath part of the long-fiber nonwoven fabric filament and the propylene-based elastomer polymer which is the core part is 10/90 to 50/50, 30/70. If the content ratio of the elastomer as component A in the core portion is higher than a certain level in the constitution ratio of the sheath-modified polypropylene and the propylene-based elastomer polymer as the core portion, the pit and the elastic restoring force are improved. If the elastomer content is too much, So that it is adhered to the porous continuous belt and the heat calender roll, and production is not achieved.

In addition, since the stretchability of the nonwoven fabric increases due to the characteristics of the A-component polymer of the core portion, a winding condition different from the general method of the winding portion is required as described above.

The following examples illustrate the invention in more detail and are not intended to limit the scope of the invention.

The test procedures for the properties of the nonwoven fabric made by the following examples and comparative examples are as follows:

Permanent Elongation (%) Measurement Test:

According to the ASTM D882 method, the sample was dropped between pneumatically activated line-contacting grips. The pressure was adjusted to prevent slippage (typically 50 to 100 psi). The crosshead speed was set at 300 mm / min. The crosshead was stretched to 100% strain and returned to 0% strain at the same crosshead speed. The elastic recovery force was defined according to the following equation (1). In all cases, samples were measured fresh or out of date.

[Equation 1]

Permanent elongation (%) = (? L / Li) X 100

Here,? L = Lf - Li, Lf = length after fiber drawing, and Li = length before fiber drawing.

touch:

The tactility of the spunbonded nonwoven fabric was evaluated by 30 testers. This evaluation was carried out according to the following criteria.

A: More than 27 out of 30 testers said that the nonwoven fabric had good tactile feel because there was no stickiness.

B: Twenty-six to twenty-one of the thirty testees said that the nonwoven fabric had good tactile feel due to no stickiness.

C: Twenty to fifteen out of thirty testees said that the nonwoven fabric had good tactile feel due to no stickiness.

D: 14 to 9 out of 30 testers said that the nonwoven fabric had good tactile feel due to no stickiness.

Example 1

Using a bicomponent system equipment, the propylene-based elastomer polymer (Vistamaxx) commercially available from Exxon Mobil Corporation as a core component A was used as a core component. The melt index of the elastomer was 48 g / 10 min at 230 DEG C and the density was 0.865 g / cc. As for the component B, the melt index of LG was a homopolymer of polypropylene having a MI of 34 g / 10 min and a density of 0.900 g / cc at 230 ° C.

The ratio of the bispecific lines was such that the weight ratio of the core to the warp portion was 75/25 of the total fibers. That is, in the core portion, Vistamaxx 75wt%, 22wt% of the polypropylene in the sheath portion and 3wt% of the slurry masterbone erucamide (Erucamide) were added.

The embossing roll temperature was 120 DEG C and thermally adhered at a pressure of 80 N / mm to produce a nonwoven fabric having a basis weight of 70 gsm. The nonwoven fabric was wound at an embossing roll rotation speed X of 0.90 at a rpm.

Permanent elongation at 100% elongation was measured on the nonwoven fabric sheet formed of bicomponent fibers, and the feel of the nonwoven fabric was evaluated. The results are shown in Table 1 below.

Example 2

A nonwoven fabric was prepared in the same manner as in Example 1 except that the core / wool raw material ratio was 90/10 and the wollastonite PP content was 7wt%.

Comparative Example 1

The core / sheath raw material ratio was 95/5 as compared with Example 1, and a nonwoven fabric was produced in the same manner as in Example 1 except that 2 wt% of polypropylene was added to the sheath.

Comparative Example 2

The core / sheath raw material ratio was 90/10 as compared with Example 1, and a nonwoven fabric was produced in the same manner as in Example 1, except that 10 wt% of polypropylene and elastomer masterbatch as a slip agent were not added.

Comparative Example 3

The core / sheath raw material ratio was 90/10 as compared with Example 1, and nonwoven fabrics were produced in the same manner as in Example 1, except that 10 wt% of polyethylene, SK, and erucamide master slurry as a slip agent were not added.

Comparative Example 4

A 30 gsm nonwoven fabric was produced in the same manner as in Example 1, except that the core / sheath raw material ratio was 90/10, the PP content was 7 wt%, and the slurry was 3 wt% erucamide.

Comparative Example 5

Non-woven fabric The non-woven fabric was produced in the same manner as in Comparative Example 4, except that the temperature of the embossing roll was 130 ° C and thermally adhered at a pressure of 100 N / mm to produce a nonwoven fabric.

division Raw material ratio weight
(g / m < 2 & Permanent elongation  %
(100%, < ASTM D882 ) touch Core
(Component A) Sheath
(Component B) (Core / Sheath) MD CD Example  One Vistamaxx PP22 % + Slip3 % 75/25 70 18.5 19.2 A Example  2 Vistamaxx PP7 % + Slip3 % 90/10 70 15.1 15.4 B Comparative Example  One Vistamaxx PP2 % + Slip3 % 95/5 70 8.1 8.3 C Comparative Example  2 Vistamaxx PP10 % 90/10 70 - - D Comparative Example  3 Vistamaxx PE10 % 90/10 70 - - - Comparative Example  4 Vistamaxx PP7 % + Slip3 % 90/10 30 17.2 17.6 B Comparative Example  5 Vistamaxx PP7 % + Slip3 % 90/10 70 16.2 16.5 C

Although the preferred embodiments of the nonwoven fabric and the method of manufacturing the same secured with mobility have been described in the foregoing description of the present invention, the content of the nonwoven fabric is not limited to the description described in the above embodiments, 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.

Claims (21)

A polyolefin random copolymer having a melt index (MI) of 40 to 50 g / 10 min, a density of 0.830 to 0.930 g / cm 3, a melting point of 45 to 110 캜, and a heat of fusion of 60 J / g or less, Having a melting point (MI) of 30 to 40 g / 10 min, a density of 0.850 to 0.950 g / cc, a melting point of 160 to 170 캜, and a heat of fusion of 80 J / g or less, wherein the polyolefin- Is a B component constituting the surface of the fiber, and the fiber forming the sheath part of the fiber is thermo-pressed to have excellent shape stability.
The spun-bonded nonwoven fabric according to claim 1, wherein the proportion of the polyolefin random copolymer in the core portion is 5 to 12 wt% of polyethylene derived from ethylene or non-propylene -olefin. .
The spun-bonded nonwoven fabric according to claim 1, wherein the polyolefin-based homopolymer of the sheath portion is polypropylene.
The polyolefin-based random copolymer as set forth in claim 1, wherein the polyolefin-based random copolymer forming the core portion and the polyolefin-based homopolymer forming the sheath portion have a MI of at least 40 g / 10 min or more, Wherein the difference in MI between the two polymers is at least 10 g / min or higher, wherein the MI is not higher than 40 g / 10 min at the maximum, and the mobility is secured.
The spun-bonded nonwoven fabric according to claim 1, wherein the ratio of the sheath portion and the core portion is in the range of 10/90 to 50/50 in terms of the total weight of the fibers.
2. The spunbonded nonwoven fabric according to claim 1, wherein the B component is obtained by adding 1 to 3% by weight of erucamide to the polyolefin-based homopolymer.
The spunbonded nonwoven fabric according to claim 1, wherein the nonwoven fabric has a permanent strain of not more than 20% when measured using a 100% 1-cycle hysteresis test.
The spun-bonded nonwoven fabric according to claim 1, wherein the nonwoven fabric has an elastic modulus in the MD direction of 0.2 to 1.5 kg / mm 2 when measured using a 100% 1-cycle hysteresis test.
The spun-bonded nonwoven fabric according to claim 1, wherein the nonwoven fabric has a basis weight of 10 to 200 g / m 2 and a fiber diameter of 12 to 32 μm.
a) A polyolefin random copolymer having a melt index (MI) of 40 to 50 g / 10 min, a density of 0.830 to 0.930 g / cm 3, a melting point of 45 to 110 캜, and a heat of fusion of 60 J / And feeding it to the extruder:
b) a polyolefin-based homopolymer having a melt index (MI) of 30 to 40 g / 10 min, a density of 0.850 to 0.950 g / cc, a melting point of 160 to 170 캜 and a heat of fusion of 80 J / g or less, : ≪ / RTI &
c) coextruding components A and B from each extruder as a melt to form a core portion of the fiber and a sheath portion of the fiber to form a plurality of fibers;
d) Quenching the fiber at an appropriate temperature:
e) stretching the quenched fiber:
f) forming webs of said fibers on specially shaped surface belts:
g) imparting shape stability to the web by thermocompression; and
and h) winding the web at a predetermined winding speed. The spun bonded nonwoven fabric manufacturing method according to claim 1,
The spunbonded nonwoven fabric according to claim 10, wherein the ratio of the sheath portion and the core portion is such that the sheath portion / core portion ratio ranges from 10/90 to 50/50 based on the total weight of the fibers. ≪ / RTI >
The spunbond nonwoven fabric according to claim 10, wherein the quenching temperature is 14 to 18 占 폚.
The spunbond nonwoven fabric according to claim 10, wherein the thermocompression bonding is embossed by a patterned roll.
[10] The method of claim 10, wherein the thermocompression bonding is an emboss roll having an adhesive area of 10 to 20% on one side and a bonded calender comprising a swimming roll having a smooth surface on the other side Wherein the spunbonded nonwoven fabric is used at a temperature of 80 to 120 캜.
11. The method of claim 10, wherein the predetermined winding speed is lowered by 80 to 99% of the rotation of the embossing roll.
A stretchable spunbonded nonwoven fabric laminate comprising a spunbonded nonwoven fabric having the mobility secured according to any one of claims 1 to 9.
Characterized in that the stretchable spunbond nonwoven fabric laminate according to claim 16 is applied to a stretching member.
A stretchable spunbond nonwoven fabric laminate according to claim 16, which is used as a stretch member to be used as a topsheet, a backsheet, a sidegater, a waistband, and a sidepanel, Wherein said sanitary napkin product is a sanitary napkin product.
A stretchable spunbond nonwoven fabric laminate according to claim 16, which is used as a stretch member to be used as a topsheet, a backsheet, a sidegater, a waistband, and a sidepanel, Wherein said diaper product is an adult diaper product.
Wherein the stretchable spunbonded nonwoven fabric laminate according to claim 16 is used as a topsheet, a backsheet, a sidewater, and a SAP sheet by using the laminate as an elastic member. .
A stretchable spunbonded nonwoven fabric laminate according to claim 16 as a stretching member is used as a roll puck, muscle tape, wound dressing, and medical band having excellent stretch recovery properties. Wherein the medical device is a medical device.
KR1020150135327A 2015-09-24 2015-09-24 Spunbond nonwoven fabric having an excellent mobility and manufacturing method thereof KR101776400B1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20050088361A (en) 2003-01-24 2005-09-05 미쯔이카가쿠 가부시기가이샤 Stretch nonwoven fabric and method for production thereof
KR20070085091A (en) 2004-03-19 2007-08-27 다우 글로벌 테크놀로지스 인크. Extensible and elastic conjugate fibers and webs having a nontacky feel
KR20070087619A (en) 2004-12-22 2007-08-28 킴벌리-클라크 월드와이드, 인크. High performance elastic materials made using styrene block copolymers and mixtures
KR20090128481A (en) 2007-03-30 2009-12-15 유니챰 가부시키가이샤 Nonwoven stretch fabric
KR20100080625A (en) 2007-11-09 2010-07-09 엑손모빌 케미칼 패턴츠 인코포레이티드 Fibers and non-wovens prepared with propylene-based elastomers

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20050088361A (en) 2003-01-24 2005-09-05 미쯔이카가쿠 가부시기가이샤 Stretch nonwoven fabric and method for production thereof
KR20070085091A (en) 2004-03-19 2007-08-27 다우 글로벌 테크놀로지스 인크. Extensible and elastic conjugate fibers and webs having a nontacky feel
KR20070087619A (en) 2004-12-22 2007-08-28 킴벌리-클라크 월드와이드, 인크. High performance elastic materials made using styrene block copolymers and mixtures
KR20090128481A (en) 2007-03-30 2009-12-15 유니챰 가부시키가이샤 Nonwoven stretch fabric
KR20100080625A (en) 2007-11-09 2010-07-09 엑손모빌 케미칼 패턴츠 인코포레이티드 Fibers and non-wovens prepared with propylene-based elastomers

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