WO2023090913A1 - Non-woven fabric, method for manufacturing non-woven fabric, and article - Google Patents
Non-woven fabric, method for manufacturing non-woven fabric, and article Download PDFInfo
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- WO2023090913A1 WO2023090913A1 PCT/KR2022/018242 KR2022018242W WO2023090913A1 WO 2023090913 A1 WO2023090913 A1 WO 2023090913A1 KR 2022018242 W KR2022018242 W KR 2022018242W WO 2023090913 A1 WO2023090913 A1 WO 2023090913A1
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- WIPO (PCT)
- Prior art keywords
- nonwoven fabric
- sheath
- weight
- core
- parts
- Prior art date
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- 239000004745 nonwoven fabric Substances 0.000 title claims abstract description 168
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title abstract description 26
- 239000000155 melt Substances 0.000 claims abstract description 43
- 239000000049 pigment Substances 0.000 claims abstract description 34
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 33
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- FKOKUHFZNIUSLW-UHFFFAOYSA-N 2-Hydroxypropyl stearate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(C)O FKOKUHFZNIUSLW-UHFFFAOYSA-N 0.000 description 2
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- BBITXNWQALLODC-UHFFFAOYSA-N 2-[4-(4-oxo-3,1-benzoxazin-2-yl)phenyl]-3,1-benzoxazin-4-one Chemical compound C1=CC=C2C(=O)OC(C3=CC=C(C=C3)C=3OC(C4=CC=CC=C4N=3)=O)=NC2=C1 BBITXNWQALLODC-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- D01D5/34—Core-skin structure; Spinnerette packs therefor
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/06—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyolefin as constituent
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
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- 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
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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
- D04H3/02—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
Definitions
- a nonwoven fabric, a method for making the nonwoven fabric, and an article are disclosed. More specifically, a nonwoven fabric having excellent burst strength, a method for manufacturing the nonwoven fabric, and an article are disclosed.
- Nonwoven fabrics are used for various purposes, such as for medical use, for industrial use such as protective clothing and masks, and for sanitary materials such as nappies and sanitary napkins.
- the nonwoven fabric is typically manufactured and used as a multilayer structure in which two or more layers are bonded, and is required to have excellent strength in most applications. Therefore, many researchers are immersed in the development of multi-layered nonwoven fabrics with excellent strength.
- conventional nonwoven fabrics have limitations in maintaining physical properties as weight increases.
- the toughness of the nonwoven fabric is reduced, so that when used as a nonwoven fabric for agricultural mulching, there is a problem in that it is easily torn or has poor durability.
- One embodiment of the present invention provides a nonwoven fabric having excellent burst strength.
- Another embodiment of the present invention provides a method for manufacturing the nonwoven fabric.
- Another embodiment of the present invention provides an article comprising the nonwoven fabric.
- a shear rate of 100 sec -1 and a melt viscosity measured at a temperature of 230 °C are 500 to 740 poise, and a nonwoven fabric containing a hydrophilic agent is provided.
- the amount of the hydrophilic agent may be 0.1 to 3.0 parts by weight based on 100 parts by weight of the nonwoven fabric.
- the nonwoven fabric may further include 0.1 to 10.0 parts by weight of a colored pigment based on 100 parts by weight of the nonwoven fabric.
- the nonwoven fabric may further include 0.1 to 5.0 parts by weight of a light stabilizer based on 100 parts by weight of the nonwoven fabric.
- the nonwoven fabric includes a core-sheath type composite fiber, and the core-sheath type composite fiber has a melt index (MFR: measurement temperature of 230 ° C., load of 2.16 kg) measured according to ASTM D1238 of 20 to 50 g / 10 min and a core part according to ASTM D1238.
- the measured melt index (MFR: measurement temperature 230 ° C., load 2.16 kg) may include a sheath of 40 to 120 g / 10 min.
- the melt index of the sheath may be greater than that of the core by 3 to 100 g/10 min.
- the weight ratio of the sheath to the core may be 1 to 5:9 to 5.
- the core portion may include a first polypropylene
- the sheath portion may include a second polypropylene
- the nonwoven fabric may have a toughness of 100 to 300 represented by Equation 1 below:
- Toughness MD tensile strength ⁇ MD tensile elongation / basis weight
- the nonwoven fabric may be a spunbond nonwoven fabric.
- the nonwoven fabric may be made of two or more layers.
- Another aspect of the present invention is
- a colored pigment, a light stabilizer, or a combination thereof is added to at least one of the polymer for forming the core and the polymer for forming the sheath,
- the temperature of the spinneret is maintained at 230 ⁇ 250 °C provides a method of manufacturing a nonwoven fabric.
- the manufacturing method of the nonwoven fabric may further include a step (S45) of imparting mechanical properties to the nonwoven fabric formed in the step (S40) between the steps (S40) and the step (S50).
- Another aspect of the present invention is
- An article comprising the nonwoven fabric is provided.
- the nonwoven fabric according to one embodiment of the present invention and an article including the same have excellent burst strength.
- nonwoven fabric according to one embodiment of the present invention and the article including the same can be used as a nonwoven fabric for agricultural mulching because they contain a hydrophilic agent, a colored pigment, and a light stabilizer.
- FIG. 1 is a cross-sectional view of a core-sheath type composite fiber constituting a nonwoven fabric according to an embodiment of the present invention.
- light reflectance value means the total amount of visible and usable light reflected by a surface at all wavelengths in all directions when light is irradiated thereon, and the light reflectance referred to herein Values are values measured according to British Standard BS8493:2008+A1:2010.
- the nonwoven fabric according to one embodiment of the present invention may have a melt viscosity of 500 to 740 poise measured at a shear rate of 100 sec -1 and a temperature of 230 °C according to ASTM D4440-08.
- the nonwoven fabric When the melt viscosity of the nonwoven fabric is within the above range, the nonwoven fabric may have excellent bonding properties and strength.
- the melt viscosity of the nonwoven fabric is less than 500 poise, the strength of individual fibers constituting the nonwoven fabric is reduced, and thus the strength of the nonwoven fabric is also reduced.
- the melt viscosity of the nonwoven fabric exceeds 740 poise, the bonding strength of the individual fibers constituting the nonwoven fabric is reduced, and the bonding strength between the individual fibers is weakened, thereby reducing the strength of the nonwoven fabric produced by laminating the individual fibers. .
- the melt viscosity of the non-woven fabric is the structure of the fiber constituting the non-woven fabric, the type of raw material constituting the fiber, the ratio and physical properties of the raw material, the manufacturing conditions and manufacturing method of the fiber, and the manufacturing condition and manufacturing of the non-woven fabric using the fiber method can be determined.
- the nonwoven fabric may include a hydrophilic agent.
- the hydrophilic agent may include a wax emulsion, a reactive softener, a silicone-based compound, a surfactant, or a combination thereof.
- the silicone-based compound may include amino group-containing silicone, oxyalkylene group-containing silicone, or a combination thereof.
- the surfactant is an anionic surfactant such as a carboxylate-based anionic surfactant, a sulfonate-based anionic surfactant, a sulfuric acid ester salt-based anionic surfactant, a phosphoric acid ester salt-based anionic surfactant (particularly an alkyl phosphate ester salt), and the like.
- Polyhydric alcohol monofatty acid esters such as sorbitan fatty acid esters, diethylene glycol monostearate, diethylene glycol monooleate, glyceryl monostearate, glyceryl monooleate and propylene glycol monostearate, N-(3-oleate) Iloxy-2-hydroxypropyl) diethanolamine, polyoxyethylene hydrogenated castor oil, polyoxyethylene sorbitan beeswax, polyoxyethylene sorbitan sesquistearate, polyoxyethylene monooleate, polyoxyethylene sorbitan ses Nonions such as quistearate, polyoxyethylene glyceryl monooleate, polyoxyethylene monostearate, polyoxyethylene monolaurate, polyoxyethylene monooleate, polyoxyethylene cetyl ether, and polyoxyethylene lauryl ether
- Systemic surfactants cationic surfactants such as quaternary ammonium salts, amine salts or amines; amphoteric surfactants such as alipha (
- the hydrophilic agent may be a nonionic hydrophilic agent.
- the nonionic/hydrophilic agent may include silicone-based compounds such as amino group-containing silicone and oxyalkylene group-containing silicone; Polyhydric alcohol monofatty acid esters such as sorbitan fatty acid esters, diethylene glycol monostearate, diethylene glycol monooleate, glyceryl monostearate, glyceryl monooleate and propylene glycol monostearate, N-(3-oleate) Iloxy-2-hydroxypropyl) diethanolamine, polyoxyethylene hydrogenated castor oil, polyoxyethylene sorbitan beeswax, polyoxyethylene sorbitan sesquistearate, polyoxyethylene monooleate, polyoxyethylene sorbitan ses Nonionics such as quistearate, polyoxyethylene glyceryl monooleate, polyoxyethylene monostearate, polyoxyethylene monolaurate, polyoxyethylene monooleate, polyoxyethylene cetyl ether, and polyoxyethylene lauryl ether Surfactants; or a combination thereof.
- the nonionic hydrophilic agent may include a surfactant having a solid content of 90% by weight or more (ie, a nonionic surfactant).
- the hydrophilic agent may be used in a kiss-roll method in which an emulsion-type hydrophilic agent is applied to a rotating roll to impart to a nonwoven fabric, and after drying by adjusting the rpm of the kiss-roll, the hydrophilic agent (i.e., hydrophilic agent) It is possible to adjust the amount (AOL: add on level) of the solid component) adhering to the nonwoven fabric.
- the content of the hydrophilic agent (ie, AOL) may be 0.1 to 3.0 parts by weight based on 100 parts by weight of the nonwoven fabric.
- the nonwoven fabric may further include a colored pigment.
- the colored pigment plays a role in adjusting the light reflectance and light absorbance to be suitable for nonwoven fabrics for agricultural mulching.
- the fruit or fruit tree does not burn, but the fruit colorability is deteriorated, and if the light reflectance is too high, the weeding effect may be deteriorated, the fruit or fruit tree may be burned, or the economic feasibility may be deteriorated.
- the colored pigments include black pigment, dark blue pigment, violet pigment, blue pigment, light blue pigment, gray pigment, A light gray pigment, a pink pigment, a yellow pigment, or a combination thereof may be included.
- the colored pigment may be used alone or in the form of a master batch chip prepared by melting and kneading a polymer such as polypropylene together with a light stabilizer described below.
- the content of the colored pigment (that is, the colored pigment component except for the polymer in the master batch chip) may be 0.1 to 10.0 parts by weight based on 100 parts by weight of the nonwoven fabric.
- the nonwoven fabric may further include a light stabilizer (eg, a UV stabilizer).
- a light stabilizer eg, a UV stabilizer
- the light stabilizer does not become unusable due to a decrease in strength even when the nonwoven fabric is used in the sun for a long time, and thus, it is possible to prevent a problem of reinstalling the nonwoven fabric at an additional expense.
- the light stabilizer is HALS (hindered amine light stabilizer), hydroxybenzophenone (eg, 2-hydroxy-4-n-octoxy benzophenone), hydroxybenzotriazine, cyanoacrylate, oxanilide , benzoxazinone (e.g., 2,2'-(1,4-phenylene)bis(4H-3,1-benzoxazin-4-one, commercially available from Cytec under the tradename CYASORB UV-3638) , aryl salicylate, hydroxybenzotriazole (eg 2-(2-hydroxy-5-methylphenyl)benzotriazole, 2-(2-hydroxy-5-tert-octylphenyl)benzotriazole , and 2-(2H-benzotriazol-2-yl)-4-(1,1,3,3-tetramethylbutyl)-phenol, commercially available from Cytec under the tradename CYASORB 5411) or combinations thereof.
- HALS hinderedered amine light stabilize
- the light stabilizer may be used alone or together with the colored pigment in the form of a master batch chip prepared by melting and kneading a polymer such as polypropylene.
- the content of the light stabilizer (ie, the light stabilizer component except for the polymer in the master batch chip) may be 0.1 to 5.0 parts by weight based on 100 parts by weight of the nonwoven fabric.
- the nonwoven fabric may include core-sheath type composite fibers.
- the core-sheath composite fiber has a melt index (MFR: measured temperature 230 ° C, load 2.16 kg) measured according to ASTM D1238 of 20 to 50 g / 10 min and a melt index measured according to ASTM D1238 (MFR: measured temperature 230 ° C) , a load of 2.16 kg) may include a sheath with a load of 40 to 120 g/10 min. If the melt index of the core and the melt index of the sheath are within the above range, respectively, the melt viscosity measured at a shear rate of 100 sec -1 and a temperature of 230 ° C according to ASTM D4440-08 is 500 to 740 poise, and the toughness is 100 A nonwoven fabric of ⁇ 300 can be obtained.
- MFR measured temperature 230 ° C, load 2.16 kg
- the melt index of the sheath may be greater than that of the core by 3 to 100 g/10 min (eg, 10 to 100 g/10 min). If the melt index of the sheath compared to the melt index of the core is within the above range, the melt viscosity measured at a shear rate of 100 sec -1 and a temperature of 230 ° C according to ASTM D4440-08 is 500 to 740 poise, and the toughness is 100 to 100 A nonwoven fabric of 300 can be obtained.
- the weight ratio of the sheath to the core may be 1 to 5:9 to 5. If the weight ratio of the sheath to the core is within the above range, a nonwoven fabric having a melt viscosity of 500 to 740 poise and a toughness of 100 to 300 measured at a shear rate of 100 sec -1 and a temperature of 230 ° C according to ASTM D4440-08 You can get it.
- the core portion may include a first polypropylene
- the sheath portion may include a second polypropylene
- the first polypropylene-based polymer and the second polypropylene-based polymer may be prepared using a high stereoregularity polymerization catalyst.
- the high stereoregularity polymerization catalyst may include a diester component catalyst, a succinate component catalyst, a metallocene catalyst, or a combination thereof.
- FIG. 1 is a cross-sectional view of a core-sheath type composite fiber 100 constituting a nonwoven fabric according to an embodiment of the present invention.
- a core-sheath-type composite fiber 100 may include a core portion 110 and a sheath portion 120 configured to surround the core portion 110 .
- the nonwoven fabric may have a toughness of 100 to 300 represented by Equation 1 below:
- Toughness MD tensile strength ⁇ MD tensile elongation / basis weight
- the nonwoven fabric may be a spunbond nonwoven fabric.
- the nonwoven fabric may be made of two or more layers.
- the nonwoven fabric may be a nonwoven fabric laminate.
- the fineness and basis weight of the nonwoven fabric may be appropriately selected depending on the purpose, and the normal fineness is 1.0 to 2.5 denier, for example, 0.7 to 2.0 denier, and the basis weight is 15 to 100 g / m 2 , For example, It may be 7-30 g/m 2 .
- the core-sheath composite fiber may further include additives as needed within a range not impairing the object of the present invention.
- the additives may include known heat stabilizers, weather stabilizers, various stabilizers, antistatic agents, antiblocking agents, anticlouding agents, fillers, dyes, pigments, natural oils, synthetic oils, waxes, or combinations thereof.
- the stabilizer may be an anti-aging agent such as 2,6-di-t-butyl-4-methylphenol (BHT); Tetrakis[methylene-3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate]methane, ⁇ -(3,5-di-t-butyl-4-hydroxyphenyl)propionic acid phenolic antioxidants such as alkyl esters and 2,2'-oxamidobis[ethyl-3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate; fatty acid metal salts such as zinc stearate, calcium stearate, and calcium 1,2-hydroxystearate; polyhydric alcohol fatty acid esters such as glycerin monostearate, glycerin distearate, pentaerythritol monostearate, pentaerythritol distearate, and pentaerythritol tristearate; or a combination thereof.
- the filler is silica, diatomaceous earth, alumina, titanium oxide, magnesium oxide, pumice powder, pumice balun, aluminum hydroxide, magnesium hydroxide, basic magnesium carbonate, dolomite, calcium sulfate, potassium titanate, barium sulfate, calcium sulfite, talc, clay, mica , asbestos, calcium silicate, montmorillonite, bentonite, graphite, aluminum powder, molybdenum sulfide, or combinations thereof.
- the above-described propylene-based polymer and the additives used as needed may be mixed using a known method.
- a method for manufacturing a nonwoven fabric includes the steps of melting a polymer for forming a core and a polymer for forming a sheath with separate extruders to form a melt for forming a core and a melt for forming a sheath (S10), the respective melts Discharging conjugate fibers through a spinneret having a conjugate spinning nozzle configured to form and discharge a desired fiber structure to discharge conjugate fibers (S20), cooling and stretching the conjugate fibers (S30), and cooling and stretching the conjugate fibers. and forming a nonwoven fabric by collecting the conjugated fibers on a collecting belt and depositing them to a predetermined thickness (S40), and adding a hydrophilic agent to the formed nonwoven fabric (S50).
- a colored pigment, a light stabilizer, or a combination thereof may be added to at least one of the polymer for forming the core and the polymer for forming the sheath.
- the method of adding the light stabilizer or a combination thereof to at least one of the polymer for forming the core and the polymer for forming the sheath is as described above.
- the temperature of the spinneret may be maintained at 230 to 250 ° C.
- the melt viscosity measured at a shear rate of 100 sec -1 and a temperature of 230 ° C according to ASTM D4440-08 is 500 to 740 poise, and the toughness is 100 to 100 300 nonwoven fabric can be obtained, and good process stability (spinning) can be obtained even in the nonwoven fabric manufacturing process.
- the step (S30) may be a step of cooling the conjugate fiber released in the step (S20) by air for cooling and also applying tension with air for stretching to have a predetermined fineness.
- step (S50) the method of adding a hydrophilic agent to the formed nonwoven fabric in the step (S50) is as described above.
- the method for manufacturing the nonwoven fabric may further include a step (S45) of imparting mechanical properties to the nonwoven fabric formed in the step (S40) between the steps (S40) and the step (S50).
- the step (S45) may be performed by a method using means such as needle punch, water jet, ultrasonic waves, etc. as the bridging treatment, embossing using a heated embossing roll, or thermal fusion by high-temperature ventilation.
- An article according to one embodiment of the present invention includes the above-described nonwoven fabric.
- the article may be a nonwoven fabric for agricultural mulching, but the present invention is not limited thereto.
- a nonwoven fabric made of the core-sheath composite fiber 100 having the structure of FIG. 1 was prepared in the following manner. Specifically, the first mixture of the first polypropylene for forming the core, black pigment (carbon black) and the light stabilizer (HALS) and the second mixture of the second polypropylene, the black pigment and the light stabilizer for forming the sheath are separately extruded to form a melt for forming a core and a melt for forming a sheath. At this time, the black pigment and the light stabilizer were used in the form of master batch chips prepared by melting and kneading them in a polypropylene system. Thereafter, each of the melts was discharged through a spinneret having a composite spinneret.
- each of the ejected melts was cooled with air for cooling, and tension was applied with air for stretching to obtain a predetermined fineness.
- the cooled and stretched conjugate fibers were collected on a collecting belt and deposited to a predetermined thickness to form a nonwoven fabric.
- mechanical properties were imparted to the formed nonwoven fabric by embossing using a heated embossing roll.
- the surface of the nonwoven fabric to which the mechanical properties were imparted was treated with a hydrophilic agent (ie, sorbitan fatty acid ester) using a kiss roll method, and then dried by passing through a dryer at 130 ° C. As a result, a nonwoven fabric was obtained.
- a hydrophilic agent ie, sorbitan fatty acid ester
- MFR of the first polypropylene for forming the core MFR of the second polypropylene for forming the sheath, MFR difference between the second polypropylene and the first polypropylene, the weight ratio of the sheath and the core, hydrophilic agent based on 100 parts by weight of the nonwoven fabric (Solid content: AOL) content, black pigment based on 100 parts by weight of nonwoven fabric (ie, black pigment components excluding polypropylene in master batch chips) and light stabilizer based on 100 parts by weight of nonwoven fabric (ie, polypropylene among master batch chips)
- the content of the light stabilizer component is shown in Table 1 below.
- “manufacturing temperature of nonwoven fabric” means the temperature of the spinneret.
- a nonwoven fabric made of the side-by-side composite fibers 1 having the structure of FIG. 2 was prepared in the following manner. Specifically, a first mixture of a first polypropylene for forming side A, a black pigment (carbon black) and a light stabilizer (HALS) and a second polypropylene for forming side B, a black pigment (carbon black) and a light stabilizer (HALS) The second mixture of was melted in separate extruders to form a melt for forming side A and a melt for forming side B. At this time, the black pigment and the light stabilizer were used in the form of master batch chips prepared by melting and kneading them in a polypropylene system.
- HALS light stabilizer
- each of the melts was discharged through a spinneret having a composite spinneret. Thereafter, each of the ejected melts was cooled with air for cooling, and tension was applied with air for stretching to obtain a predetermined fineness. Thereafter, the cooled and stretched conjugate fibers were collected on a collecting belt and deposited to a predetermined thickness to form a nonwoven fabric. Thereafter, mechanical properties were imparted to the formed nonwoven fabric by embossing using a heated embossing roll.
- the surface of the nonwoven fabric to which the mechanical properties were imparted was treated with a hydrophilic agent (ie, sorbitan fatty acid ester) using a kiss roll method, and then dried by passing through a dryer at 130 ° C. As a result, a nonwoven fabric was obtained.
- a hydrophilic agent ie, sorbitan fatty acid ester
- AOL hydrophilic agent
- black pigment ie, black pigment components excluding polypropylene in master batch chips
- melt viscosity The melt viscosity of the nonwoven fabric was measured at a shear rate of 100 sec ⁇ 1 and a temperature of 230° C. according to ASTM D4440-08.
- Tensile strength A tensile test was performed under the conditions of a specimen width of 5 cm, interval of 10 cm, and tensile speed of 500 mm / min according to the KSK 0520 method using a tensile strength elongation machine (Instron) measuring equipment, and the maximum tensile load was obtained.
- Basis weight (weight: g/m 2 ): Measured according to ASTM D 3776-1985.
- Toughness MD tensile strength ⁇ MD tensile elongation / basis weight
- Absorption rate of liquid A method of expressing the absorbency of a nonwoven fabric treated with a liquid (0.9% by weight NaCl aqueous solution) in units of time by determining the absorption time in units of seconds using a lister (EDANA 150.3-96). (MH 989 SH 100 mm ⁇ 100 mm), the liquid was added to the nonwoven fabric placed on top, and the time for the liquid to pass through the absorbent paper was measured.
- the nonwoven fabrics prepared in Examples 1 to 9 had melt viscosity in the range of 500 to 740 poise, toughness in the range of 100 to 300, and both MD tensile strength and MD tensile elongation. It was excellent, and the absorption rate of the liquid was also found to be fast. In addition, the nonwoven fabric manufacturing process of Examples 1 to 9 was also found to be excellent in process stability (spinning).
- the nonwoven fabrics prepared in Comparative Examples 1 to 11 had a melt viscosity outside the range of 500 to 740 poise and toughness also outside the range of 100 to 300.
- the nonwoven fabrics prepared in Comparative Examples 3 to 9 showed a slow absorption rate of liquid.
- the nonwoven fabric manufacturing process of Comparative Examples 1 to 3 had poor process stability (spinning), and the nonwoven fabric manufacturing process of Comparative Example 10 had normal process stability (spinning).
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Abstract
Description
부직포, 부직포의 제조방법 및 물품이 개시된다. 보다 상세하게는, 파열강도가 우수한 부직포, 부직포의 제조방법 및 물품이 개시된다.A nonwoven fabric, a method for making the nonwoven fabric, and an article are disclosed. More specifically, a nonwoven fabric having excellent burst strength, a method for manufacturing the nonwoven fabric, and an article are disclosed.
부직포는 의료용, 방호복용 및 마스크용과 같은 산업용, 및 기저기와 생리대 같은 위생재용 등 다양한 용도로 사용되고 있다.Nonwoven fabrics are used for various purposes, such as for medical use, for industrial use such as protective clothing and masks, and for sanitary materials such as nappies and sanitary napkins.
또한, 부직포는 통상적으로 2이상의 층이 본딩된 다층 구조로 제조되어 사용되는데, 대부분의 용도에서 우수한 강도를 가질 것이 요구된다. 따라서, 많은 연구자들이 우수한 강도를 갖는 다층 구조의 부직포 개발에 몰두하고 있는 실정이다.In addition, the nonwoven fabric is typically manufactured and used as a multilayer structure in which two or more layers are bonded, and is required to have excellent strength in most applications. Therefore, many researchers are immersed in the development of multi-layered nonwoven fabrics with excellent strength.
또한, 최근 트렌드에 따라 기존 부직포의 저중량화를 추구할 경우 기존 부직포의 물성을 그대로 유지하거나 나아가 부직포의 물성을 추가로 향상시키는데 있어서는 공정상의 한계나 설비적인 한계가 있었다.In addition, when the weight reduction of the existing nonwoven fabric is pursued according to the recent trend, there are process limitations or equipment limitations in maintaining the physical properties of the existing nonwoven fabric or further improving the physical properties of the nonwoven fabric.
또한, 종래의 부직포는 중량 증가에 따른 물성 유지에 한계가 있다. 특히, 고중량에서는 부직포의 터프니스가 작아져서 농업용 멀칭용 부직포로 사용할 경우 잘 뜯어지거나 내구성이 떨어지는 문제점이 있다.In addition, conventional nonwoven fabrics have limitations in maintaining physical properties as weight increases. In particular, at a high weight, the toughness of the nonwoven fabric is reduced, so that when used as a nonwoven fabric for agricultural mulching, there is a problem in that it is easily torn or has poor durability.
본 발명의 일 구현예는 파열강도가 우수한 부직포를 제공한다.One embodiment of the present invention provides a nonwoven fabric having excellent burst strength.
본 발명의 다른 구현예는 상기 부직포의 제조방법을 제공한다.Another embodiment of the present invention provides a method for manufacturing the nonwoven fabric.
본 발명의 또 다른 구현예는 상기 부직포를 포함하는 물품을 제공한다.Another embodiment of the present invention provides an article comprising the nonwoven fabric.
본 발명의 일 측면은,One aspect of the present invention,
ASTM D4440-08에 따라 100sec-1의 전단속도 및 230℃의 온도에서 측정된 용융점도가 500~740poise이고, 친수제를 포함하는 부직포를 제공한다.According to ASTM D4440-08, a shear rate of 100 sec -1 and a melt viscosity measured at a temperature of 230 °C are 500 to 740 poise, and a nonwoven fabric containing a hydrophilic agent is provided.
상기 친수제의 함량은 상기 부직포 100중량부에 대하여 0.1~3.0중량부일 수 있다.The amount of the hydrophilic agent may be 0.1 to 3.0 parts by weight based on 100 parts by weight of the nonwoven fabric.
상기 부직포는 상기 부직포 100중량부에 대하여 유색안료 0.1~10.0중량부를 더 포함할 수 있다.The nonwoven fabric may further include 0.1 to 10.0 parts by weight of a colored pigment based on 100 parts by weight of the nonwoven fabric.
상기 부직포는 상기 부직포 100중량부에 대하여 광안정제 0.1~5.0중량부를 더 포함할 수 있다.The nonwoven fabric may further include 0.1 to 5.0 parts by weight of a light stabilizer based on 100 parts by weight of the nonwoven fabric.
상기 부직포는 심초형 복합섬유를 포함하고, 상기 심초형 복합섬유는 ASTM D1238에 따라 측정된 용융지수(MFR: 측정 온도 230℃, 하중 2.16 kg)가 20~50g/10min인 심부 및 ASTM D1238에 따라 측정된 용융지수(MFR: 측정 온도 230℃, 하중 2.16 kg)가 40~120g/10min인 초부를 포함할 수 있다.The nonwoven fabric includes a core-sheath type composite fiber, and the core-sheath type composite fiber has a melt index (MFR: measurement temperature of 230 ° C., load of 2.16 kg) measured according to ASTM D1238 of 20 to 50 g / 10 min and a core part according to ASTM D1238. The measured melt index (MFR: measurement temperature 230 ° C., load 2.16 kg) may include a sheath of 40 to 120 g / 10 min.
상기 초부는 용융지수가 상기 심부보다 3~100g/10min만큼 클 수 있다.The melt index of the sheath may be greater than that of the core by 3 to 100 g/10 min.
상기 초부 대 상기 심부의 중량비는 1~5:9~5일 수 있다.The weight ratio of the sheath to the core may be 1 to 5:9 to 5.
상기 심부는 제1 폴리프로필렌을 포함하고, 상기 초부는 제2 폴리프로필렌을 포함할 수 있다.The core portion may include a first polypropylene, and the sheath portion may include a second polypropylene.
상기 부직포는 하기 수학식1로 표시되는 터프니스가 100~300일 수 있다:The nonwoven fabric may have a toughness of 100 to 300 represented by
[수학식 1][Equation 1]
터프니스 = MD 인장강도 × MD 인장신도/기본중량Toughness = MD tensile strength × MD tensile elongation / basis weight
상기 부직포는 스펀본드 부직포일 수 있다.The nonwoven fabric may be a spunbond nonwoven fabric.
상기 부직포는 2 이상의 층으로 이루어질 수 있다.The nonwoven fabric may be made of two or more layers.
본 발명의 다른 측면은,Another aspect of the present invention is
심부 형성용 중합체와 초부 형성용 중합체를 각각 별개의 압출기로 용융시켜 심부 형성용 용융물 및 초부 형성용 용융물을 형성하는 단계(S10);Melting the polymer for forming the core and the polymer for forming the sheath using separate extruders to form a melt for forming the core and a melt for forming the sheath (S10);
상기 각 용융물을 복합 방사 노즐을 갖는 방사 구금을 통해 토출시켜 복합 섬유를 방출시키는 단계(S20);Discharging each of the melts through a spinneret having a composite spinning nozzle to release composite fibers (S20);
상기 방출된 복합 섬유를 냉각 및 연신시키는 단계(S30); Cooling and stretching the released composite fibers (S30);
상기 냉각 및 연신된 복합 섬유를 포집 벨트상에 포집하여 미리 결정된 두께로 퇴적시켜 부직포를 형성하는 단계(S40); 및Collecting the cooled and stretched conjugate fibers on a collecting belt and depositing them to a predetermined thickness to form a nonwoven fabric (S40); and
상기 형성된 부직포에 친수제를 첨가하는 단계(S50)를 포함하고,Adding a hydrophilic agent to the formed nonwoven fabric (S50),
상기 단계(10)에서 상기 심부 형성용 중합체 및 상기 초부 형성용 중합체 중 적어도 하나에는 유색안료, 광안정제 또는 이들의 조합이 첨가되고,In the step (10), a colored pigment, a light stabilizer, or a combination thereof is added to at least one of the polymer for forming the core and the polymer for forming the sheath,
상기 단계(S20)에서 상기 방사 구금의 온도는 230~250℃로 유지되는 부직포의 제조방법을 제공한다.In the step (S20), the temperature of the spinneret is maintained at 230 ~ 250 ℃ provides a method of manufacturing a nonwoven fabric.
상기 부직포의 제조방법은 상기 단계(S40)와 상기 단계(S50) 사이에 상기 단계(S40)에서 형성된 부직포에 기계적 물성을 부여하는 단계(S45)를 더 포함할 수 있다.The manufacturing method of the nonwoven fabric may further include a step (S45) of imparting mechanical properties to the nonwoven fabric formed in the step (S40) between the steps (S40) and the step (S50).
본 발명의 또 다른 측면은,Another aspect of the present invention is
상기 부직포를 포함하는 물품을 제공한다.An article comprising the nonwoven fabric is provided.
본 발명의 일 구현예에 따른 부직포 및 이를 포함하는 물품은 파열강도가 우수한 이점을 갖는다.The nonwoven fabric according to one embodiment of the present invention and an article including the same have excellent burst strength.
또한, 본 발명의 일 구현예에 따른 부직포 및 이를 포함하는 물품은 친수제, 유색안료 및 광안정제를 함유하고 있어서 농업용 멀칭용 부직포로 사용될 수 있다. In addition, the nonwoven fabric according to one embodiment of the present invention and the article including the same can be used as a nonwoven fabric for agricultural mulching because they contain a hydrophilic agent, a colored pigment, and a light stabilizer.
도 1은 본 발명의 일 구현예에 따른 부직포를 구성하는 심초형 복합섬유의 단면도이다.1 is a cross-sectional view of a core-sheath type composite fiber constituting a nonwoven fabric according to an embodiment of the present invention.
도 2는 비교예 11에 따른 부직포를 구성하는 사이드 바이 사이드형 복합섬유의 단면도이다.2 is a cross-sectional view of side-by-side composite fibers constituting the nonwoven fabric according to Comparative Example 11.
이하, 본 발명의 일 구현예에 따른 부직포를 상세히 설명한다.Hereinafter, a nonwoven fabric according to an embodiment of the present invention will be described in detail.
본 명세서에서, "광 반사율 값(light reflectance value)"이란 광이 조사될 때 모든 방향으로 모든 파장에서 한 표면에 의해 반사되는 가시적이고 이용가능한 빛의 총량을 의미하고, 본 명세서에서 언급된 광 반사율 값은 British Standard인 BS8493:2008+A1:2010에 따라 측정된 값이다.In this specification, "light reflectance value" means the total amount of visible and usable light reflected by a surface at all wavelengths in all directions when light is irradiated thereon, and the light reflectance referred to herein Values are values measured according to British Standard BS8493:2008+A1:2010.
본 발명의 일 구현예에 따른 부직포는 ASTM D4440-08에 따라 100sec-1의 전단속도 및 230℃의 온도에서 측정된 용융점도가 500~740poise일 수 있다. The nonwoven fabric according to one embodiment of the present invention may have a melt viscosity of 500 to 740 poise measured at a shear rate of 100 sec -1 and a temperature of 230 °C according to ASTM D4440-08.
상기 부직포의 용융점도가 상기 범위이내이면, 상기 부직포는 우수한 본딩성 및 강도를 가질 수 있다. When the melt viscosity of the nonwoven fabric is within the above range, the nonwoven fabric may have excellent bonding properties and strength.
또한, 상기 부직포의 용융점도가 500poise 미만이면 상기 부직포를 구성하는 개별 섬유의 강도가 감소하여 상기 부직포의 강도도 감소하게 된다. 또한, 상기 부직포의 용융점도가 740poise를 초과하면 상기 부직포를 구성하는 개별 섬유의 본딩성이 감소하여 개별 섬유들 간의 결합력이 약화되고, 이에 따라 개별 섬유들을 적층하여 제조된 부직포의 강도도 감소하게 된다.In addition, when the melt viscosity of the nonwoven fabric is less than 500 poise, the strength of individual fibers constituting the nonwoven fabric is reduced, and thus the strength of the nonwoven fabric is also reduced. In addition, when the melt viscosity of the nonwoven fabric exceeds 740 poise, the bonding strength of the individual fibers constituting the nonwoven fabric is reduced, and the bonding strength between the individual fibers is weakened, thereby reducing the strength of the nonwoven fabric produced by laminating the individual fibers. .
상기 부직포의 용융점도는 상기 부직포를 구성하는 섬유의 구조, 상기 섬유를 구성하는 원료의 종류, 원료의 비율과 물성, 상기 섬유의 제조조건과 제조방법 및 상기 섬유를 이용한 상기 부직포의 제조조건과 제조방법에 의해 결정될 수 있다.The melt viscosity of the non-woven fabric is the structure of the fiber constituting the non-woven fabric, the type of raw material constituting the fiber, the ratio and physical properties of the raw material, the manufacturing conditions and manufacturing method of the fiber, and the manufacturing condition and manufacturing of the non-woven fabric using the fiber method can be determined.
상기 부직포는 친수제를 포함할 수 있다. The nonwoven fabric may include a hydrophilic agent.
상기 친수제는 왁스 에멀젼, 반응형 유연제, 실리콘계 화합물, 계면활성제 또는 이들의 조합을 포함할 수 있다. 상기 실리콘계 화합물은 아미노기 함유 실리콘, 옥시알킬렌기 함유 실리콘 또는 이들의 조합을 포함할 수 있다. 상기 계면활성제는 카르복실산염계의 음이온성 계면활성제, 술폰산염계의 음이온성 계면활성제, 황산에스테르염계의 음이온성 계면활성제, 인산에스테르염계의 음이온성 계면활성제(특히 알킬인산에스테르염) 등의 음이온성 계면활성제; 소르비탄 지방산 에스테르, 디에틸렌글리콜모노스테아레이트, 디에틸렌글리콜모노올레에이트, 글리세릴모노스테아레이트, 글리세릴모노올레에이트, 프로필렌글리콜모노스테아레이트 등의 다가 알코올 모노 지방산 에스테르, N-(3-올레일옥시-2-하이드록시프로필)디에탄올아민, 폴리옥시에틸렌 경화 피마자유, 폴리옥시에틸렌소르비트 밀납, 폴리옥시에틸렌소르비탄세스퀴스테아레이트, 폴리옥시에틸렌모노올레에이트, 폴리옥시에틸렌소르비탄세스퀴스테아레이트, 폴리옥시에틸렌글리세릴모노올레에이트, 폴리옥시에틸렌모노스테아레이트, 폴리옥시에틸렌모노라우레이트, 폴리옥시에틸렌모노올레에이트, 폴리옥시에틸렌세틸에테르, 폴리옥시에틸렌라우릴에테르 등의 비이온계 계면활성제: 제4급 암모늄염, 아민염 또는 아민 등의 양이온성 계면활성제; 카르복시, 술포네이트, 설페이트를 함유하는 제2급 혹은 제3급 아민의 지방족 유도체, 또는 복소환식 제2급 혹은 제3급 아민의 지방족 유도체 등의 양쪽성 계면활성제; 또는 이들의 조합을 포함할 수 있다.The hydrophilic agent may include a wax emulsion, a reactive softener, a silicone-based compound, a surfactant, or a combination thereof. The silicone-based compound may include amino group-containing silicone, oxyalkylene group-containing silicone, or a combination thereof. The surfactant is an anionic surfactant such as a carboxylate-based anionic surfactant, a sulfonate-based anionic surfactant, a sulfuric acid ester salt-based anionic surfactant, a phosphoric acid ester salt-based anionic surfactant (particularly an alkyl phosphate ester salt), and the like. Surfactants; Polyhydric alcohol monofatty acid esters such as sorbitan fatty acid esters, diethylene glycol monostearate, diethylene glycol monooleate, glyceryl monostearate, glyceryl monooleate and propylene glycol monostearate, N-(3-oleate) Iloxy-2-hydroxypropyl) diethanolamine, polyoxyethylene hydrogenated castor oil, polyoxyethylene sorbitan beeswax, polyoxyethylene sorbitan sesquistearate, polyoxyethylene monooleate, polyoxyethylene sorbitan ses Nonions such as quistearate, polyoxyethylene glyceryl monooleate, polyoxyethylene monostearate, polyoxyethylene monolaurate, polyoxyethylene monooleate, polyoxyethylene cetyl ether, and polyoxyethylene lauryl ether Systemic surfactants: cationic surfactants such as quaternary ammonium salts, amine salts or amines; amphoteric surfactants such as aliphatic derivatives of secondary or tertiary amines containing carboxy, sulfonates and sulfates, or aliphatic derivatives of heterocyclic secondary or tertiary amines; or a combination thereof.
구체적으로, 상기 친수제는 비이온성 친수제일 수 있다.Specifically, the hydrophilic agent may be a nonionic hydrophilic agent.
상기 비이온성 친수제는 아미노기 함유 실리콘, 옥시알킬렌기 함유 실리콘과 같은 실리콘계 화합물; 소르비탄 지방산 에스테르, 디에틸렌글리콜모노스테아레이트, 디에틸렌글리콜모노올레에이트, 글리세릴모노스테아레이트, 글리세릴모노올레에이트, 프로필렌글리콜모노스테아레이트 등의 다가 알코올 모노 지방산 에스테르, N-(3-올레일옥시-2-하이드록시프로필)디에탄올아민, 폴리옥시에틸렌 경화 피마자유, 폴리옥시에틸렌소르비트 밀납, 폴리옥시에틸렌소르비탄세스퀴스테아레이트, 폴리옥시에틸렌모노올레에이트, 폴리옥시에틸렌소르비탄세스퀴스테아레이트, 폴리옥시에틸렌글리세릴모노올레에이트, 폴리옥시에틸렌모노스테아레이트, 폴리옥시에틸렌모노라우레이트, 폴리옥시에틸렌모노올레에이트, 폴리옥시에틸렌세틸에테르, 폴리옥시에틸렌라우릴에테르 등의 비이온성 계면활성제; 또는 이들의 조합을 포함할 수 있다.The nonionic/hydrophilic agent may include silicone-based compounds such as amino group-containing silicone and oxyalkylene group-containing silicone; Polyhydric alcohol monofatty acid esters such as sorbitan fatty acid esters, diethylene glycol monostearate, diethylene glycol monooleate, glyceryl monostearate, glyceryl monooleate and propylene glycol monostearate, N-(3-oleate) Iloxy-2-hydroxypropyl) diethanolamine, polyoxyethylene hydrogenated castor oil, polyoxyethylene sorbitan beeswax, polyoxyethylene sorbitan sesquistearate, polyoxyethylene monooleate, polyoxyethylene sorbitan ses Nonionics such as quistearate, polyoxyethylene glyceryl monooleate, polyoxyethylene monostearate, polyoxyethylene monolaurate, polyoxyethylene monooleate, polyoxyethylene cetyl ether, and polyoxyethylene lauryl ether Surfactants; or a combination thereof.
보다 구체적으로, 상기 비이온성 친수제는 고형분 함량이 90중량% 이상인 계면활성제(즉, 비이온성 계면활성제)를 포함할 수 있다.More specifically, the nonionic hydrophilic agent may include a surfactant having a solid content of 90% by weight or more (ie, a nonionic surfactant).
또한, 상기 친수제는 에멀젼 타입의 친수제를 회전하는 롤에 부여하여 부직포에 부여하는 키스롤(kiss-roll) 방식으로 사용될 수 있으며, 키스롤의 rpm을 조절함으로써 건조후 친수제(즉, 친수제의 고형성분)이 부직포에 고착되는 양(AOL: add on level)을 조절할 수 있다.In addition, the hydrophilic agent may be used in a kiss-roll method in which an emulsion-type hydrophilic agent is applied to a rotating roll to impart to a nonwoven fabric, and after drying by adjusting the rpm of the kiss-roll, the hydrophilic agent (i.e., hydrophilic agent) It is possible to adjust the amount (AOL: add on level) of the solid component) adhering to the nonwoven fabric.
상기 친수제의 함량(즉, AOL)은 상기 부직포 100중량부에 대하여 0.1~3.0중량부일 수 있다.The content of the hydrophilic agent (ie, AOL) may be 0.1 to 3.0 parts by weight based on 100 parts by weight of the nonwoven fabric.
또한, 상기 부직포는 유색안료를 더 포함할 수 있다.In addition, the nonwoven fabric may further include a colored pigment.
상기 유색안료는 광 반사율과 광 흡수율을 농업용 멀칭용 부직포에 적합하게 조절하는 역할을 수행한다.The colored pigment plays a role in adjusting the light reflectance and light absorbance to be suitable for nonwoven fabrics for agricultural mulching.
상기 광 반사율이 너무 낮으면 과일이나 과수가 화상은 입히지 않으나 과일 착색성이 나빠지고, 너무 높으면 제초효과가 나빠지거나 과일 및 과수가 화상을 입거나 경제성이 나빠질 수 있다.If the light reflectance is too low, the fruit or fruit tree does not burn, but the fruit colorability is deteriorated, and if the light reflectance is too high, the weeding effect may be deteriorated, the fruit or fruit tree may be burned, or the economic feasibility may be deteriorated.
또한, 상기 광 흡수율이 너무 낮으면 지열 상승 방지 효과는 있으나 제초효과가 나빠지거나 과일 및 과수가 화상을 입거나 경제성이 나빠지며, 너무 높으면 부직포내 축열로 인한 지온 상승으로 과수의 뿌리에 악영향을 미쳐 과수의 생육을 저해할 수 있다.In addition, if the light absorption rate is too low, there is an effect of preventing the increase in geothermal heat, but the weeding effect is deteriorated, fruits and fruit trees are burned, or economic efficiency is deteriorated. It can inhibit the growth of fruit trees.
또한, 상기 유색안료는 흑색안료(black pigment), 감색안료(dark blue pigment), 보라색 안료(violet pigment), 청색안료(blue pigment), 담청색 안료(light blue pigment), 회색안료(gray pigment), 담회색 안료(light gray pigment), 분홍색 안료(pink pigment), 황색안료(yellow pigment) 또는 이들의 조합을 포함할 수 있다.In addition, the colored pigments include black pigment, dark blue pigment, violet pigment, blue pigment, light blue pigment, gray pigment, A light gray pigment, a pink pigment, a yellow pigment, or a combination thereof may be included.
또한, 상기 유색안료는 이를 단독으로 또는 후술하는 광안정제와 함께 폴리프로필렌과 같은 중합체와 용융혼련하여 제조한 마스터 배치 칩의 형태로 사용될 수 있다.In addition, the colored pigment may be used alone or in the form of a master batch chip prepared by melting and kneading a polymer such as polypropylene together with a light stabilizer described below.
또한, 상기 유색안료(즉, 마스터 배치 칩에서 중합체를 제외한 유색안료 성분)의 함량은 상기 부직포 100중량부에 대하여 0.1~10.0중량부일 수 있다.In addition, the content of the colored pigment (that is, the colored pigment component except for the polymer in the master batch chip) may be 0.1 to 10.0 parts by weight based on 100 parts by weight of the nonwoven fabric.
또한, 상기 부직포는 광안정제(예를 들어, 자외선 안정제)를 더 포함할 수 있다.In addition, the nonwoven fabric may further include a light stabilizer (eg, a UV stabilizer).
상기 광안정제는 상기 부직포를 햇볕에 장기간 사용하더라도 강도 저하로 인해 사용이 불가능해지는 경우가 없어서, 추가 경비를 들여 이를 재설치해야 하는 문제를 방지할 수 있다.The light stabilizer does not become unusable due to a decrease in strength even when the nonwoven fabric is used in the sun for a long time, and thus, it is possible to prevent a problem of reinstalling the nonwoven fabric at an additional expense.
상기 광안정제는 HALS(hindered amine light stabilizer), 히드록시벤조페논(예를 들어, 2-히드록시-4-n-옥톡시 벤조페논), 히드록시벤조트리아진, 시아노아크릴레이트, 옥사닐라이드, 벤족사지논 (예를 들어, Cytec으로부터 상표명 CYASORB UV-3638로 상업적으로 입수가능한, 2,2'-(1,4-페닐렌)비스(4H-3,1-벤족사진-4-온), 아릴 살리실레이트, 히드록시벤조트리아졸 (예를 들어, 2-(2-히드록시-5-메틸페닐)벤조트리아졸, 2-(2-히드록시-5-tert-옥틸페닐)벤조트리아졸, 및 2-(2H-벤조트리아졸-2-일)-4-(1,1,3,3-테트라메틸부틸)-페놀, Cytec으로부터 상표명 CYASORB 5411로 상업적으로 입수가능함) 또는 이들의 조합을 포함할 수 있다.The light stabilizer is HALS (hindered amine light stabilizer), hydroxybenzophenone (eg, 2-hydroxy-4-n-octoxy benzophenone), hydroxybenzotriazine, cyanoacrylate, oxanilide , benzoxazinone (e.g., 2,2'-(1,4-phenylene)bis(4H-3,1-benzoxazin-4-one, commercially available from Cytec under the tradename CYASORB UV-3638) , aryl salicylate, hydroxybenzotriazole (eg 2-(2-hydroxy-5-methylphenyl)benzotriazole, 2-(2-hydroxy-5-tert-octylphenyl)benzotriazole , and 2-(2H-benzotriazol-2-yl)-4-(1,1,3,3-tetramethylbutyl)-phenol, commercially available from Cytec under the tradename CYASORB 5411) or combinations thereof. can include
또한, 상기 광안정제는 이를 단독으로 또는 상기 유색안료와 함께 폴리프로필렌과 같은 중합체와 용융혼련하여 제조한 마스터 배치 칩의 형태로 사용될 수 있다.In addition, the light stabilizer may be used alone or together with the colored pigment in the form of a master batch chip prepared by melting and kneading a polymer such as polypropylene.
또한, 상기 광안정제(즉, 마스터 배치 칩에서 중합체를 제외한 광안정제 성분)의 함량은 상기 부직포 100중량부에 대하여 0.1~5.0중량부일 수 있다.In addition, the content of the light stabilizer (ie, the light stabilizer component except for the polymer in the master batch chip) may be 0.1 to 5.0 parts by weight based on 100 parts by weight of the nonwoven fabric.
상기 부직포는 심초형 복합섬유를 포함할 수 있다.The nonwoven fabric may include core-sheath type composite fibers.
상기 심초형 복합섬유는 ASTM D1238에 따라 측정된 용융지수(MFR: 측정 온도 230℃, 하중 2.16 kg)가 20~50g/10min인 심부 및 ASTM D1238에 따라 측정된 용융지수(MFR: 측정 온도 230℃, 하중 2.16 kg)가 40~120g/10min인 초부를 포함할 수 있다. 상기 심부의 용융지수와 상기 초부의 용융지수가 각각 상기 범위이내이면, ASTM D4440-08에 따라 100sec-1의 전단속도 및 230℃의 온도에서 측정된 용융점도가 500~740poise이고, 터프니스가 100~300인 부직포를 얻을 수 있다.The core-sheath composite fiber has a melt index (MFR: measured temperature 230 ° C, load 2.16 kg) measured according to ASTM D1238 of 20 to 50 g / 10 min and a melt index measured according to ASTM D1238 (MFR: measured temperature 230 ° C) , a load of 2.16 kg) may include a sheath with a load of 40 to 120 g/10 min. If the melt index of the core and the melt index of the sheath are within the above range, respectively, the melt viscosity measured at a shear rate of 100 sec -1 and a temperature of 230 ° C according to ASTM D4440-08 is 500 to 740 poise, and the toughness is 100 A nonwoven fabric of ~300 can be obtained.
또한, 상기 초부는 용융지수가 상기 심부보다 3~100g/10min(예를 들어, 10~100g/10min)만큼 클 수 있다. 상기 심부의 용융지수 대비 상기 초부의 용융지수가 상기 범위이내이면, ASTM D4440-08에 따라 100sec-1의 전단속도 및 230℃의 온도에서 측정된 용융점도가 500~740poise이고, 터프니스가 100~300인 부직포를 얻을 수 있다.In addition, the melt index of the sheath may be greater than that of the core by 3 to 100 g/10 min (eg, 10 to 100 g/10 min). If the melt index of the sheath compared to the melt index of the core is within the above range, the melt viscosity measured at a shear rate of 100 sec -1 and a temperature of 230 ° C according to ASTM D4440-08 is 500 to 740 poise, and the toughness is 100 to 100 A nonwoven fabric of 300 can be obtained.
상기 초부 대 상기 심부의 중량비는 1~5:9~5일 수 있다. 상기 초부 대 상기 심부의 중량비가 상기 범위이내이면, ASTM D4440-08에 따라 100sec-1의 전단속도 및 230℃의 온도에서 측정된 용융점도가 500~740poise이고, 터프니스가 100~300인 부직포를 얻을 수 있다.The weight ratio of the sheath to the core may be 1 to 5:9 to 5. If the weight ratio of the sheath to the core is within the above range, a nonwoven fabric having a melt viscosity of 500 to 740 poise and a toughness of 100 to 300 measured at a shear rate of 100 sec -1 and a temperature of 230 ° C according to ASTM D4440-08 You can get it.
또한, 상기 심부는 제1 폴리프로필렌을 포함하고, 상기 초부는 제2 폴리프로필렌을 포함할 수 있다.In addition, the core portion may include a first polypropylene, and the sheath portion may include a second polypropylene.
상기 제1 폴리프로필렌계 중합체 및 상기 제2 폴리프로필렌계 중합체는 고입체규칙성 중합 촉매를 사용하여 제조된 것일 수 있다. The first polypropylene-based polymer and the second polypropylene-based polymer may be prepared using a high stereoregularity polymerization catalyst.
상기 고입체규칙성 중합 촉매는 디에스테르 성분의 촉매, 석시네이트 성분의 촉매, 메탈로센 촉매 또는 이들의 조합을 포함할 수 있다.The high stereoregularity polymerization catalyst may include a diester component catalyst, a succinate component catalyst, a metallocene catalyst, or a combination thereof.
도 1은 본 발명의 일 구현예에 따른 부직포를 구성하는 심초형 복합섬유(100)의 단면도이다.1 is a cross-sectional view of a core-sheath type
도 1을 참조하면, 심초형 복합섬유(100)는 심부(110) 및 이를 둘러싸도록 구성된 초부(120)를 포함할 수 있다.Referring to FIG. 1 , a core-sheath-
상기 부직포는 하기 수학식1로 표시되는 터프니스가 100~300일 수 있다:The nonwoven fabric may have a toughness of 100 to 300 represented by
[수학식 1][Equation 1]
터프니스 = MD 인장강도 × MD 인장신도/기본중량Toughness = MD tensile strength × MD tensile elongation / basis weight
상기 부직포는 스펀본드 부직포일 수 있다.The nonwoven fabric may be a spunbond nonwoven fabric.
상기 부직포는 2 이상의 층으로 이루어질 수 있다. 예를 들어, 상기 부직포는 부직포 적층체일 수 있다.The nonwoven fabric may be made of two or more layers. For example, the nonwoven fabric may be a nonwoven fabric laminate.
상기 부직포의 섬도 및 기본 중량은 용도에 따라 적절히 선택될 수 있는데, 통상 섬도는 1.0~2.5 데니어, 예를 들어, 0.7~2.0 데니어이고, 기본 중량은 15~100 g/m2, 예를 들어, 7~30 g/m2일 수 있다.The fineness and basis weight of the nonwoven fabric may be appropriately selected depending on the purpose, and the normal fineness is 1.0 to 2.5 denier, for example, 0.7 to 2.0 denier, and the basis weight is 15 to 100 g / m 2 , For example, It may be 7-30 g/m 2 .
상기 심초형 복합섬유는 상기 제1 폴리프로필렌계 중합체 및 상기 제2 폴리프로필렌계 중합체 외에 본 발명의 목적을 손상시키지 않는 범위에서 필요에 따라 첨가제를 더 포함할 수 있다. 상기 첨가제는 공지된 내열안정제, 내후안정제, 각종 안정제, 대전 방지제, 안티블로킹제, 방운제(anticlouding agent), 충전제, 염료, 안료, 천연유, 합성유, 왁스 또는 이들의 조합을 포함할 수 있다.In addition to the first polypropylene-based polymer and the second polypropylene-based polymer, the core-sheath composite fiber may further include additives as needed within a range not impairing the object of the present invention. The additives may include known heat stabilizers, weather stabilizers, various stabilizers, antistatic agents, antiblocking agents, anticlouding agents, fillers, dyes, pigments, natural oils, synthetic oils, waxes, or combinations thereof.
상기 안정제는 2,6-디-t-부틸-4-메틸페놀(BHT) 등의 노화 방지제; 테트라키스[메틸렌-3-(3,5-디-t-부틸-4-히드록시페닐) 프로피오네이트]메탄, β-(3,5-디-t-부틸-4-히드록시페닐)프로피온산 알킬에스테르, 2,2'-옥사미도비스[에틸-3-(3,5-디-t-부틸-4-히드록시페닐)프로피오네이트 등의 페놀계 산화 방지제; 스테아르산 아연, 스테아르산 칼슘, 1,2-히드록시스테아르산 칼슘 등의 지방산 금속염; 글리세린모노스테아레이트, 글리세린디스테아레이트, 펜타에리스리톨모노스테아레이트, 펜타에리스리톨디스테아레이트, 펜타에리스리톨트리스테아레이트 등의 다가 알코올 지방산 에스테르; 또는 이들의 조합을 포함할 수 있다.The stabilizer may be an anti-aging agent such as 2,6-di-t-butyl-4-methylphenol (BHT); Tetrakis[methylene-3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate]methane, β-(3,5-di-t-butyl-4-hydroxyphenyl)propionic acid phenolic antioxidants such as alkyl esters and 2,2'-oxamidobis[ethyl-3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate; fatty acid metal salts such as zinc stearate, calcium stearate, and
상기 충전제는 실리카, 규조토, 알루미나, 산화티탄, 산화마그네슘, 경석분, 경석 밸룬, 수산화알루미늄, 수산화마그네슘, 염기성 탄산마그네슘, 백운석, 황산칼슘, 티탄산칼륨, 황산바륨, 아황산칼슘, 활석, 클레이, 운모, 석면, 규산칼슘, 몬모릴로나이트, 벤토나이트, 그래파이트, 알루미늄분, 황화몰리브덴 또는 이들의 조합을 포함할 수 있다.The filler is silica, diatomaceous earth, alumina, titanium oxide, magnesium oxide, pumice powder, pumice balun, aluminum hydroxide, magnesium hydroxide, basic magnesium carbonate, dolomite, calcium sulfate, potassium titanate, barium sulfate, calcium sulfite, talc, clay, mica , asbestos, calcium silicate, montmorillonite, bentonite, graphite, aluminum powder, molybdenum sulfide, or combinations thereof.
상술한 프로필렌계 중합체와 필요에 따라 사용되는 상기 첨가제는 공지된 방법을 이용하여 혼합할 수 있다.The above-described propylene-based polymer and the additives used as needed may be mixed using a known method.
이하, 본 발명의 일 구현예에 따른 부직포의 제조방법을 상세히 설명한다.Hereinafter, a method for manufacturing a nonwoven fabric according to an embodiment of the present invention will be described in detail.
본 발명의 일 구현예에 따른 부직포의 제조방법은 심부 형성용 중합체와 초부 형성용 중합체를 각각 별개의 압출기로 용융시켜 심부 형성용 용융물 및 초부 형성용 용융물을 형성하는 단계(S10), 상기 각 용융물을 원하는 섬유 구조를 형성하여 토출하도록 구성된 복합 방사 노즐을 갖는 방사 구금을 통해 토출시켜 복합 섬유를 방출시키는 단계(S20), 상기 방출된 복합 섬유를 냉각 및 연신시키는 단계(S30), 상기 냉각 및 연신된 복합 섬유를 포집 벨트상에 포집하여 미리 결정된 두께로 퇴적시켜 부직포를 형성하는 단계(S40), 및 상기 형성된 부직포에 친수제를 첨가하는 단계(S50)를 포함한다.A method for manufacturing a nonwoven fabric according to an embodiment of the present invention includes the steps of melting a polymer for forming a core and a polymer for forming a sheath with separate extruders to form a melt for forming a core and a melt for forming a sheath (S10), the respective melts Discharging conjugate fibers through a spinneret having a conjugate spinning nozzle configured to form and discharge a desired fiber structure to discharge conjugate fibers (S20), cooling and stretching the conjugate fibers (S30), and cooling and stretching the conjugate fibers. and forming a nonwoven fabric by collecting the conjugated fibers on a collecting belt and depositing them to a predetermined thickness (S40), and adding a hydrophilic agent to the formed nonwoven fabric (S50).
상기 단계(10)에서 상기 심부 형성용 중합체 및 상기 초부 형성용 중합체 중 적어도 하나에는 유색안료, 광안정제 또는 이들의 조합이 첨가될 수 있다. 이 경우, 상기 광안정제 또는 이들의 조합이 상기 심부 형성용 중합체 및 상기 초부 형성용 중합체 중 적어도 하나에 첨가되는 방법은 상술한 바와 같다.In step 10, a colored pigment, a light stabilizer, or a combination thereof may be added to at least one of the polymer for forming the core and the polymer for forming the sheath. In this case, the method of adding the light stabilizer or a combination thereof to at least one of the polymer for forming the core and the polymer for forming the sheath is as described above.
상기 단계(S20)에서 상기 방사 구금의 온도는 230~250℃로 유지될 수 있다. 상기 단계(S20)에서 상기 방사 구금의 온도가 상기 범위이내이면, ASTM D4440-08에 따라 100sec-1의 전단속도 및 230℃의 온도에서 측정된 용융점도가 500~740poise이고, 터프니스가 100~300인 부직포를 얻을 수 있고, 부직포 제조공정에서도 양호한 공정 안정성(방사성)을 얻을 수 있다. In the step (S20), the temperature of the spinneret may be maintained at 230 to 250 ° C. In the step (S20), when the temperature of the spinneret is within the above range, the melt viscosity measured at a shear rate of 100 sec -1 and a temperature of 230 ° C according to ASTM D4440-08 is 500 to 740 poise, and the toughness is 100 to 100 300 nonwoven fabric can be obtained, and good process stability (spinning) can be obtained even in the nonwoven fabric manufacturing process.
상기 단계(S30)는 상기 단계(S20)에서 방출된 복합 섬유를 냉각용 공기에 의해 냉각하고, 또한 연신용 공기에 의해 장력을 가하여 소정의 섬도를 갖게 하는 단계일 수 있다. The step (S30) may be a step of cooling the conjugate fiber released in the step (S20) by air for cooling and also applying tension with air for stretching to have a predetermined fineness.
또한, 상기 단계(S50)에서 상기 형성된 부직포에 친수제를 첨가하는 방법은 상술한 바와 같다. In addition, the method of adding a hydrophilic agent to the formed nonwoven fabric in the step (S50) is as described above.
또한, 상기 부직포의 제조방법은 상기 단계(S40)와 상기 단계(S50) 사이에 상기 단계(S40)에서 형성된 부직포에 기계적 물성을 부여하는 단계(S45)를 더 포함할 수 있다.In addition, the method for manufacturing the nonwoven fabric may further include a step (S45) of imparting mechanical properties to the nonwoven fabric formed in the step (S40) between the steps (S40) and the step (S50).
상기 단계(S45)는 교락 처리로서 니들 펀치, 워터 제트, 초음파 등의 수단을 이용하는 방법, 가열 엠보싱 롤을 이용하는 엠보싱 가공 또는 고온 통기에 의해 열융착하는 방법에 의해 수행될 수 있다.The step (S45) may be performed by a method using means such as needle punch, water jet, ultrasonic waves, etc. as the bridging treatment, embossing using a heated embossing roll, or thermal fusion by high-temperature ventilation.
이하, 본 발명의 일 구현예에 따른 물품을 상세히 설명한다.Hereinafter, an article according to an embodiment of the present invention will be described in detail.
본 발명의 일 구현예에 따른 물품은 상술한 부직포를 포함한다.An article according to one embodiment of the present invention includes the above-described nonwoven fabric.
상기 물품은 농업용 멀칭용 부직포일 수 있으나, 본 발명이 이에 한정되는 것은 아니다.The article may be a nonwoven fabric for agricultural mulching, but the present invention is not limited thereto.
이하, 실시예를 통하여 본 발명을 보다 상세히 설명하고자 한다. 본 실시예는 본 발명을 보다 구체적으로 설명하기 위한 것이며, 본 발명의 범위가 이들 실시예에 한정되는 것은 아니다.Hereinafter, the present invention will be described in more detail through examples. These examples are intended to explain the present invention in more detail, and the scope of the present invention is not limited to these examples.
실시예 1~9 및 비교예 1~10: 부직포의 제조Examples 1 to 9 and Comparative Examples 1 to 10: Preparation of nonwoven fabric
도 1의 구조를 갖는 심초형 복합섬유(100)로 이루어진 부직포를 하기와 같은 방법으로 제조하였다. 구체적으로, 심부 형성용 제1 폴리프로필렌, 흑색안료(카본블랙) 및 광안정제(HALS)의 제1 혼합물과 초부 형성용 제2 폴리프로필렌, 흑색안료 및 광안정제의 제2 혼합물을 각각 별개의 압출기로 용융시켜 심부 형성용 용융물 및 초부 형성용 용융물을 형성하였다. 이때, 상기 흑색안료 및 상기 광안정제는 이들을 폴리프로필렌계 용융혼련하여 제조한 마스터 배치 칩의 형태로 사용되었다. 이후, 상기 각 용융물을 복합 방사 노즐을 갖는 방사 구금을 통해 토출시켰다. 이후, 상기 토출된 각 용융물을 냉각용 공기에 의해 냉각하고, 또한 연신용 공기에 의해 장력을 가하여 소정의 섬도를 갖게 하였다. 이후, 상기 냉각 및 연신된 복합 섬유를 포집 벨트상에 포집하여 미리 결정된 두께로 퇴적시켜 부직포를 형성하였다. 이후, 가열 엠보싱 롤을 이용하는 엠보싱 가공에 의해 상기 형성된 부직포에 기계적 물성을 부여하였다. 이후, 상기 기계적 물성이 부여된 부직포를 키스롤 방식을 이용하여 친수제(즉, 소르비탄 지방산 에스테르)로 표면처리한 다음 130℃의 건조기로 통과시켜 건조시켰다. 결과로서, 부직포를 얻었다.A nonwoven fabric made of the core-
또한, 상기 심부 형성용 제1 폴리프로필렌의 MFR, 상기 초부 형성용 제2 폴리프로필렌의 MFR, 제2 폴리프로필렌과 제1 폴리프로필렌의 MFR차이, 초부와 심부의 중량비, 부직포 100중량부 기준 친수제(고형분: AOL)의 함량, 부직포 100중량부 기준 흑색안료(즉, 마스터 배치 칩 중 폴리프로필렌을 제외한 흑색안료 성분)의 함량 및 부직포 100중량부 기준 광안정제(즉, 마스터 배치 칩 중 폴리프로필렌을 제외한 광안정제 성분)의 함량을 하기 표 1에 나타내었다. 하기 표 1에서, "부직포의 제조온도"란 방사 구금의 온도를 의미한다.In addition, MFR of the first polypropylene for forming the core, MFR of the second polypropylene for forming the sheath, MFR difference between the second polypropylene and the first polypropylene, the weight ratio of the sheath and the core, hydrophilic agent based on 100 parts by weight of the nonwoven fabric (Solid content: AOL) content, black pigment based on 100 parts by weight of nonwoven fabric (ie, black pigment components excluding polypropylene in master batch chips) and light stabilizer based on 100 parts by weight of nonwoven fabric (ie, polypropylene among master batch chips) The content of the light stabilizer component) is shown in Table 1 below. In Table 1 below, "manufacturing temperature of nonwoven fabric" means the temperature of the spinneret.
비교예 11: 부직포의 제조Comparative Example 11: Preparation of nonwoven fabric
도 2의 구조를 갖는 사이드 바이 사이드형 복합섬유(1)로 이루어진 부직포를 하기와 같은 방법으로 제조하였다. 구체적으로, 사이드 A 형성용 제1 폴리프로필렌, 흑색안료(카본블랙) 및 광안정제(HALS)의 제1 혼합물과 사이드 B 형성용 제2 폴리프로필렌, 흑색안료(카본블랙) 및 광안정제(HALS)의 제2 혼합물을 각각 별개의 압출기로 용융시켜 사이드 A 형성용 용융물 및 사이드 B 형성용 용융물을 형성하였다. 이때, 상기 흑색안료 및 상기 광안정제는 이들을 폴리프로필렌계 용융혼련하여 제조한 마스터 배치 칩의 형태로 사용되었다. 이후, 상기 각 용융물을 복합 방사 노즐을 갖는 방사 구금을 통해 토출시켰다. 이후, 상기 토출된 각 용융물을 냉각용 공기에 의해 냉각하고, 또한 연신용 공기에 의해 장력을 가하여 소정의 섬도를 갖게 하였다. 이후, 상기 냉각 및 연신된 복합 섬유를 포집 벨트상에 포집하여 미리 결정된 두께로 퇴적시켜 부직포를 형성하였다. 이후, 가열 엠보싱 롤을 이용하는 엠보싱 가공에 의해 상기 형성된 부직포에 기계적 물성을 부여하였다. 이후, 상기 기계적 물성이 부여된 부직포를 키스롤 방식을 이용하여 친수제(즉, 소르비탄 지방산 에스테르)로 표면처리한 다음 130℃의 건조기로 통과시켜 건조시켰다. 결과로서, 부직포를 얻었다.A nonwoven fabric made of the side-by-
또한, 상기 사이드 A 형성용 제1 폴리프로필렌의 MFR, 상기 사이드 B 형성용 제2 폴리프로필렌의 MFR, 상기 사이드 B 형성용 제2 폴리프로필렌과 상기 사이드 A 형성용 제1 폴리프로필렌의 MFR차이, 사이드 A와 사이드 B의 중량비, 부직포 100중량부 기준 친수제(고형분: AOL)의 함량, 부직포 100중량부 기준 흑색안료(즉, 마스터 배치 칩 중 폴리프로필렌을 제외한 흑색안료 성분)의 함량 및 부직포 100중량부 기준 광안정제(즉, 마스터 배치 칩 중 폴리프로필렌을 제외한 광안정제 성분)의 함량를 하기 표 1에 나타내었다. 하기 표 1에서, "부직포의 제조온도"란 방사 구금의 온도를 의미한다.In addition, the MFR of the first polypropylene for forming the side A, the MFR of the second polypropylene for forming the side B, the difference between the MFR of the second polypropylene for forming the side B and the first polypropylene for forming the side A, side Weight ratio of A and side B, content of hydrophilic agent (solid content: AOL) based on 100 parts by weight of nonwoven fabric, content of black pigment (ie, black pigment components excluding polypropylene in master batch chips) based on 100 parts by weight of nonwoven fabric, and 100 parts by weight of nonwoven fabric The content of the secondary light stabilizer (that is, the light stabilizer component except for polypropylene in the master batch chip) is shown in Table 1 below. In Table 1 below, "manufacturing temperature of nonwoven fabric" means the temperature of the spinneret.
평가예: 부직포의 물성 평가Evaluation Example: Evaluation of physical properties of nonwoven fabric
상기 실시예 1~9 및 비교예 1~11에서 제조된 각각의 부직포의 물성을 하기와 같은 방법으로 평가하여, 그 결과를 하기 표 2에 나타내었다.The physical properties of each of the nonwoven fabrics prepared in Examples 1 to 9 and Comparative Examples 1 to 11 were evaluated in the following manner, and the results are shown in Table 2 below.
(1) 용융점도: ASTM D4440-08에 따라 100sec-1의 전단속도 및 230℃의 온도에서 부직포의 용융점도를 측정하였다.(1) Melt viscosity: The melt viscosity of the nonwoven fabric was measured at a shear rate of 100 sec −1 and a temperature of 230° C. according to ASTM D4440-08.
(2) 인장강도: 인장강신도기(Instron) 측정설비를 이용하여 KSK 0520법에 따라 시험편의 폭 5cm, 간격 10cm, 인장속도 500mm/min의 조건으로 인장 시험을 수행하여 최대 인장 하중을 구하였다.(2) Tensile strength: A tensile test was performed under the conditions of a specimen width of 5 cm, interval of 10 cm, and tensile speed of 500 mm / min according to the KSK 0520 method using a tensile strength elongation machine (Instron) measuring equipment, and the maximum tensile load was obtained.
(3) 인장신도: 상기 (3)의 방법으로 측정한 최대 신장시의 신도를 구하였다.(3) Tensile elongation: The elongation at maximum elongation measured by the method of (3) above was determined.
(4) 기본중량(중량: g/m2): ASTM D 3776-1985에 따라 측정하였다.(4) Basis weight (weight: g/m 2 ): Measured according to ASTM D 3776-1985.
(5) 터프니스: 상기 (2)에서 얻어진 인장 강도(N/5cm)와 상기 (3)에서 얻어진 인장신도(%)를 사용하고, 하기 수학식 1에 의해 터프니스를 구하였다.(5) Toughness: Using the tensile strength (N/5 cm) obtained in (2) above and the tensile elongation (%) obtained in (3) above, toughness was obtained by the following
[수학식 1][Equation 1]
터프니스 = MD 인장강도 × MD 인장신도/기본중량Toughness = MD tensile strength × MD tensile elongation / basis weight
(6) 액체의 흡수속도: 리스터기(EDANA 150.3-96)를 사용하여 흡수시간을 초단위로 정하여 액체(0.9중량%의 NaCl 수용액)로 처리된 부직포의 흡수성을 시간 단위로 나타내는 방법으로서, 흡수지(MH 989 SH 100mm×100mm) 위에 올려진 부직포에 액체를 가하여 액체가 흡수지를 통과하는 시간을 측정하였다. (6) Absorption rate of liquid: A method of expressing the absorbency of a nonwoven fabric treated with a liquid (0.9% by weight NaCl aqueous solution) in units of time by determining the absorption time in units of seconds using a lister (EDANA 150.3-96). (MH 989
(7) 공정 안정성(방사성): 용융방사시 필라멘트 흔들림을 육안으로 관찰하였으며, 폴리머 드립(drip)을 결점 검출기로 검출하였다. (7) Process stability (radiation): filament shaking during melt spinning was observed with the naked eye, and polymer drips were detected with a defect detector.
상기 표 2를 참조하면, 실시예 1~9에서 제조된 부직포는 용융점도가 500~740poise의 범위에 속하고, 터프니스가 100~300의 범위에 속할 뿐만 아니라 MD 인장강도 및 MD 인장신도도 모두 우수하고, 액체의 흡수속도도 빠른 것으로 나타났다. 또한, 실시예 1~9의 부직포 제조공정은 공정 안정성(방사성)도 우수한 것으로 나타났다.Referring to Table 2, the nonwoven fabrics prepared in Examples 1 to 9 had melt viscosity in the range of 500 to 740 poise, toughness in the range of 100 to 300, and both MD tensile strength and MD tensile elongation. It was excellent, and the absorption rate of the liquid was also found to be fast. In addition, the nonwoven fabric manufacturing process of Examples 1 to 9 was also found to be excellent in process stability (spinning).
반면에, 비교예 1~11에서 제조된 부직포는 용융점도가 500~740poise의 범위를 벗어나고, 터프니스도 100~300의 범위를 벗어나는 것으로 나타났다. 또한, 비교예 3~9에서 제조된 부직포는 액체의 흡수속도도 느린 것으로 나타났다. 또한, 비교예 1~3의 부직포 제조공정은 공정 안정성(방사성)이 불량하고, 비교예 10의 부직포 제조공정은 공정 안정성(방사성)이 보통인 것으로 나타났다.On the other hand, the nonwoven fabrics prepared in Comparative Examples 1 to 11 had a melt viscosity outside the range of 500 to 740 poise and toughness also outside the range of 100 to 300. In addition, the nonwoven fabrics prepared in Comparative Examples 3 to 9 showed a slow absorption rate of liquid. In addition, the nonwoven fabric manufacturing process of Comparative Examples 1 to 3 had poor process stability (spinning), and the nonwoven fabric manufacturing process of Comparative Example 10 had normal process stability (spinning).
본 발명은 도면 및 실시예를 참고로 설명되었으나 이는 예시적인 것에 불과하며, 본 기술 분야의 통상의 지식을 가진 자라면 이로부터 다양한 변형 및 균등한 다른 구현예가 가능하다는 점을 이해할 것이다. 따라서, 본 발명의 진정한 기술적 보호 범위는 첨부된 특허청구범위의 기술적 사상에 의하여 정해져야 할 것이다. Although the present invention has been described with reference to drawings and embodiments, these are only examples, and those skilled in the art will understand that various modifications and equivalent other implementations are possible therefrom. Therefore, the true technical scope of protection of the present invention should be determined by the technical spirit of the appended claims.
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|---|---|---|---|---|
| JP2003003334A (en) * | 2001-06-22 | 2003-01-08 | Daiwabo Co Ltd | Crimped conjugate fiber, method for manufacturing the same and nonwoven fabric using the same |
| JP2003013354A (en) * | 2001-06-26 | 2003-01-15 | Toray Ind Inc | Spun-bond nonwoven fabric |
| JP3895063B2 (en) * | 1997-12-19 | 2007-03-22 | 三井化学株式会社 | Non-woven |
| KR20130004323A (en) * | 2007-03-02 | 2013-01-09 | 미쓰이 가가쿠 가부시키가이샤 | Layered nonwoven fabric |
| JP2020147878A (en) * | 2019-03-15 | 2020-09-17 | ダイワボウホールディングス株式会社 | Core-sheath-type composite fiber, manufacturing method thereof, and fiber aggregate including the same |
-
2022
- 2022-11-17 WO PCT/KR2022/018242 patent/WO2023090913A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3895063B2 (en) * | 1997-12-19 | 2007-03-22 | 三井化学株式会社 | Non-woven |
| JP2003003334A (en) * | 2001-06-22 | 2003-01-08 | Daiwabo Co Ltd | Crimped conjugate fiber, method for manufacturing the same and nonwoven fabric using the same |
| JP2003013354A (en) * | 2001-06-26 | 2003-01-15 | Toray Ind Inc | Spun-bond nonwoven fabric |
| KR20130004323A (en) * | 2007-03-02 | 2013-01-09 | 미쓰이 가가쿠 가부시키가이샤 | Layered nonwoven fabric |
| JP2020147878A (en) * | 2019-03-15 | 2020-09-17 | ダイワボウホールディングス株式会社 | Core-sheath-type composite fiber, manufacturing method thereof, and fiber aggregate including the same |
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