KR102294746B1 - Ecofriendly composite fiber spunbond non-woven fabric comprising plant-derived polyethylene and menufacturing method thereof - Google Patents

Abstract

The eco-friendly composite fiber spunbond nonwoven fabric containing plant-derived polyethylene according to an embodiment of the present invention is obtained by melting a first component containing polypropylene and a second component containing plant-derived polyethylene with separate extruders, respectively. of polymer is spun with a nozzle capable of side-by-side spinning, solidified by applying cooling air to the spun filament, and then the solidified filament is stretched through a stretching process, and then the drawn filament is integrated into a continuously driven porous screen belt. to form a nonwoven web, and by thermally bonding the integrated nonwoven web to impart morphological stability to the nonwoven web.

Description

Eco-friendly composite fiber spunbond nonwoven fabric containing plant-derived polyethylene and manufacturing method thereof

The present invention relates to an eco-friendly composite fiber spunbond nonwoven fabric containing a plant-derived composition and a method for manufacturing the same, and more specifically, to a composite fiber manufactured by complex spinning plant-derived polypropylene and petroleum-derived polypropylene, and a spunbond nonwoven fabric using the same it's about

Most of the fiber raw materials constituting the nonwoven fabric are derived from fossil fuels such as polypropylene and polyethylene. However, in a situation in which environmental pollution is recognized as a serious problem worldwide and research on eco-friendly materials to solve this problem is continuing, petroleum-derived materials emit high carbon dioxide emissions during extraction from petroleum, making them an eco-friendly material. Substitution is being requested.

However, conventional eco-friendly materials have been developed and released with a focus on biodegradability, which is easy to decompose at the time of disposal. have.

In order to solve this problem, Korean Patent Registration No. 101231985 discloses a composite long fiber spunbond nonwoven fabric by placing the filaments constituting the nonwoven fabric in the core sheath type, placing polypropylene in the core component, and placing polyethylene derived from plants in the sheath component. Discloses a method for preparing However, the patent has a problem of lowering productivity due to poor spinnability of the polymer, and inability to achieve physical properties required for other non-woven fabrics. In particular, the nonwoven web formed as described above has a simple structure without crimps, thereby forming a thin nonwoven fabric in the heat bonding process. Therefore, since it is difficult to form a high loft nonwoven fabric with such a nonwoven web, there is a problem in that softness is lowered due to low bulky properties.

Republic of Korea Patent Registration No. 10-1231985

The present invention is to solve the problems of the prior art as described above, and provides an eco-friendly composite fiber with improved softness while reducing the amount of carbon dioxide generated during manufacturing, and a spunbond nonwoven fabric using the same.

These and other objects and advantages of the present invention will become more apparent from the following description of preferred embodiments.

The above object is produced by compound spinning a first component containing polypropylene and a second component containing plant-derived polyethylene, and the viscosity and melting point of the first component are higher than that of the second component. This is achieved by fiber spunbond nonwovens.

Preferably, the first component may have a melting point of 150 to 170° C. and a melt flow index of 25 to 60 g/10 min. And preferably, the melting point of the second component is 120 ~ 130 ℃, the melt flow index may be 16 ~ 24 g / 10 minutes. In this case, it is preferable that the melt flow index difference between the first component and the second component is 20 g/10 min or less.

Preferably, the first component and the second component may have a weight ratio of 70:30 to 50:50.

Preferably, when the second component is spun alone and incinerated, carbon dioxide is emitted at 1,350 kgCO ² eq/ton or less, and more preferably, the composite fiber spunbond nonwoven fabric has a carbon dioxide content of 4,000 kgCO ² eq/ton or less when incinerated. can be emitted as

Preferably, the composite fiber spunbond nonwoven fabric may have a thickness of 0.6 to 0.8 mm.

Preferably, the composite fiber spunbond nonwoven fabric may be 2.5 to 4.5 gf as a result of HOM (Handle-o-meter) measurement.

Preferably, the composite fiber spunbond nonwoven fabric may be formed in a form in which a part of the second component is exposed to the outside or is spun in a side-by-side form.

Preferably, the composite fiber spunbond nonwoven fabric may be manufactured as a nonwoven fabric by imparting shape stability by thermal bonding using an embossing roll.

Preferably, the first component and the second component are melted with separate extruders, each polymer is spun with a nozzle capable of side-by-side spinning, and cooling air is applied to the spun filament to solidify it. have.

In addition, the above object is to melt each of the first component containing polypropylene and the second component containing plant-derived polyethylene with separate extruders to spin each polymer with a nozzle capable of side-by-side spinning, After solidification by applying cooling air to the filaments, the solidified filaments are stretched through a stretching process, and then the stretched filaments are integrated on a continuously driven porous screen belt to form a nonwoven web, and the integrated nonwoven web is thermally bonded. It is formed by imparting morphological stability to the nonwoven web, and is achieved by an eco-friendly composite fiber spunbond nonwoven fabric containing plant-derived polyethylene having a viscosity and melting point of the first component higher than that of the second component.

In addition, the above object is to melt each of the first component containing polypropylene and the second component containing plant-derived polyethylene with separate extruders and spinning each polymer with a nozzle capable of side-by-side spinning, spinning After solidification by applying cooling air to the filaments, the solidified filaments are stretched through a stretching process, and then the stretched filaments are integrated on a continuously driven porous screen belt to form a nonwoven web, and thermal bonding of the integrated nonwoven web It is achieved by a method for manufacturing an eco-friendly composite fiber spunbond nonwoven fabric containing plant-derived polyethylene having a viscosity and melting point of the first component higher than the second component by bonding to the nonwoven fabric web.

As described above, the eco-friendly composite fiber spunbond nonwoven fabric containing plant-derived polyethylene according to an embodiment of the present invention has eco-friendly characteristics by reducing the amount of carbon dioxide generated in the fiber material manufacturing process by using plant-derived polyethylene together.

In addition, the eco-friendly composite fiber spunbond non-woven fabric containing plant-derived polyethylene according to an embodiment of the present invention can provide a high-loft non-woven fabric that maintains soft properties while having a thickness despite using an eco-friendly material.

In addition, the eco-friendly composite fiber spunbond nonwoven fabric containing plant-derived polyethylene according to an embodiment of the present invention contains plant-derived polyethylene, and thus has a feature of low carbon dioxide emission when incinerated and discarded after use.

In addition, the eco-friendly composite material spunbond nonwoven fabric containing plant-derived polyethylene according to an embodiment of the present invention can form a thick high-loft nonwoven fabric through a crimp structure, and has high bulky properties such as diapers and sanitary napkins It can be used for the back sheet of

However, the effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the following description.

1 is a view for explaining the drawing state of the eco-friendly composite fiber spunbond nonwoven fabric containing plant-derived polyethylene according to an embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to embodiments and drawings of the present invention. It will be apparent to those of ordinary skill in the art that these examples are only presented by way of example to explain the present invention in more detail, and that the scope of the present invention is not limited by these examples. .

In order to clearly express various layers and regions in the drawings, the thicknesses are enlarged. Throughout the specification, like reference numerals are assigned to similar parts. When a part of a layer, film, region, plate, etc. is said to be “on” another part, it includes not only cases where it is “directly on” another part, but also cases where there is another part in between. Conversely, when we say that a part is "just above" another part, we mean that there is no other part in the middle.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, the present specification, including definitions, will control. Also, although methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present invention, suitable methods and materials are described herein.

The eco-friendly composite fiber spunbond nonwoven fabric containing plant-derived polyethylene according to an embodiment of the present invention is manufactured by complex spinning a first component containing petroleum-derived polypropylene and a second component containing plant-derived polyethylene.

In this case, it is preferable that the viscosity and melting point of the first component containing petroleum-derived polypropylene is higher than that of the second component containing plant-derived polyethylene. This is because it is easier to form a crimp as the viscosity and melting point of different kinds of raw materials are different when side-by-side composite spinning of petroleum-derived polypropylene and plant-derived polyethylene.

More specifically, the melting point of the first component comprising petroleum-derived polypropylene is preferably 150 to 170 ℃. When the melting point of the first component is less than 150 ° C., there is a problem of sticking to the embossing process in the thermocompression bonding process, and when the melting point of the first component exceeds 170 ° C. There is a problem with rising

It is also preferred that the melt flow index of the first component is between 25 and 60 g/10 min. If the melt flow index of the first component is less than 25 g/10 minutes, the flowability is not good, resulting in a spinning problem, and when the melt flow index of the first component exceeds 60 g/10 minutes, the flowability is too good, even in this case This is because there is a problem of poor radiation.

In addition, it is preferable that the melting point of the second component comprising plant-derived polyethylene is 120 to 130°C. If the melting point of the second component is less than 120 ℃, there is a problem of sticking to the embossing in the thermocompression bonding process, and when the melting point of the second component exceeds 130 ℃, the thermocompression bonding temperature must be increased a lot for thermocompression bonding. There is a problem of increased usage.

It is also preferred that the second component has a melt flow index of 16 to 24 g/10 min. If the melt flow index of the first component is less than 16 g/10 min, there is a problem of poor spinning due to poor flowability, and if the melt flow index of the first component exceeds 24 g/10 min, the flowability is too good, even in this case This is because there is also a problem of poor radiation.

In addition, it is preferred that the melt flow index difference between the first component and the second component is 20 g/10 min or less. If the difference in the melt flow index between the first component and the second component is more than 20 g/10 min, the difference in the melt flow index becomes large and a spinning problem occurs, so it is preferable to be in the above range.

In addition, when the first component and the second component constituting the composite fiber are composite spinning, the first component and the second component preferably have a weight ratio of 70:30 to 50:50. When the first component has a weight ratio of more than 70% in the weight ratio between the first component and the second component, the amount of eco-friendly material used in the entire composite fiber is lowered, which is undesirable because the carbon dioxide reduction effect is greatly reduced, and also, the first component is When the weight ratio is less than 50%, the soft properties of the composite fiber and the nonwoven fabric made of the composite fiber are reduced, so that the commercial value of the product using the nonwoven fabric may be reduced.

The eco-friendly composite fiber spunbond nonwoven fabric containing plant-derived polyethylene according to an embodiment of the present invention minimizes carbon dioxide generated during incineration in the process of discarding the nonwoven fabric or composite fiber after use in order to increase eco-friendliness. To this end, in the present invention, when the second component containing plant-derived polyethylene is independently spun and incinerated, it _{is preferable that carbon dioxide is emitted at 1,350 kgCo 2} eq/ton or less. In addition, in the composite fiber spunbond nonwoven fabric prepared by composite spinning of the first component and the second component, it is preferable that _{carbon dioxide is emitted at less than 4,000 kgCo 2 eq/ton during incineration.}

In addition, the composite fiber spunbond nonwoven fabric prepared by composite spinning the first component containing petroleum-derived polypropylene and the second component containing plant-derived polyethylene preferably has a thickness of 0.6 to 0.8 mm. If the thickness of the composite fiber spunbond nonwoven fabric is less than 0.6mm, there is a problem that the feeling of thickness is not felt well, and when the thickness exceeds 0.8mm, there is a problem of poor processability when processing the nonwoven fabric to make a product.

In addition, the composite fiber spunbond nonwoven fabric is preferably 2.5 to 4.5 gf as a result of HOM (Handle-o-meter) measurement. If the measurement result of the HOM is less than 2.5 gf, there is a problem of poor processability when processing the nonwoven fabric to make a product, and if it exceeds 4.5 gf, there is a problem that the touch is not soft.

In addition to the petroleum-derived polypropylene component, the first component may contain other components as needed within a range that does not impair the object of the present invention. Other ingredients may include known heat-resistant stabilizers, weather-resistance stabilizers, various stabilizers, antistatic agents, anti-blocking agents, anti-fogging agents, fillers, dyes, pigments, natural oils, synthetic oils, waxes, or combinations thereof.

Stabilizers include antioxidants 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 alkylesters 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.

Fillers include silica, diatomaceous earth, alumina, titanium oxide, magnesium oxide, pumice powder, pumice balloon, 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 a combination thereof.

The above-described propylene-based polymer and the other components used as necessary may be mixed using a known method.

As a method for manufacturing a nonwoven fabric using such a composite fiber, the method for manufacturing an eco-friendly composite fiber spunbond nonwoven fabric containing plant-derived polyethylene according to an embodiment of the present invention is a first component containing polypropylene and a plant-derived A step of melting a second component including polyethylene with a separate extruder, spinning each polymer with a nozzle capable of side-by-side spinning, solidifying the spun filaments by applying cooling air, and then stretching the solidified filaments Forming a nonwoven web by integrating drawn filaments having a small fiber diameter on a continuously driven porous screen belt through a process, and bonding the integrated nonwoven web by thermal bonding or needle punching to provide shape stability of the nonwoven web is comprised of In this case, it is preferable that the viscosity and melting point of the first component are higher than those of the second component.

As described above, in the method of manufacturing an eco-friendly composite fiber spunbond nonwoven fabric containing plant-derived polyethylene according to an embodiment of the present invention, first, a composite fiber including a first component and a second component is prepared. After melting petroleum-derived polypropylene (first component) and plant-derived polyethylene (second component) through separate extruders, two polymers (first component polymer and second component polymer) are melted is spun with a nozzle capable of side-by-side spinning to produce a side-by-side type composite fiber. At this time, when the composite fiber is composite-spun in a side-by-side form, the weight ratio of the first component and the second component is preferably 70:30 to 50:50.

Next, each filament is melted with a separate extruder and air for cooling is applied to the filaments spun through a nozzle to solidify them in a side-by-side form to prepare a composite fiber. Then, the nonwoven web is formed by integrating the solidified filaments with the drawn filaments having a small fiber diameter on a continuously driven porous screen belt through the drawing process.

When the nonwoven web is formed from the spun filaments in this way, shape stability is imparted to the nonwoven web through the process of bonding the nonwoven web to complete the nonwoven form. In this case, as a method for imparting morphological stability to the nonwoven web, a thermal bonding method and a needle punching method may be used, and preferably a thermal bonding method may be used. At this time, it was found that the physical properties of the nonwoven fabric after thermal bonding vary depending on the content of the first component containing petroleum-derived polypropylene and the second component containing plant-derived polyethylene, and the productivity also shows a difference depending on the thermal bonding conditions. was selected to improve productivity and physical properties.

Specifically, through a nozzle capable of side-by-side spinning, different ratios of the first and second components are used, and the melting points and melt flow indices of the first and second components satisfy the above conditions. The physical properties can be improved by setting the thermal bonding temperature to 144 to 152°C. At this time, if the thermal bonding temperature is lower than 144℃, the adhesive strength due to heat between petroleum-derived polypropylene and plant-derived polyethylene is low, so the strength may decrease and fluff may occur severely. It is undesirable because it causes a winding phenomenon to be wound on an adhesive driving roll, making production impossible.

As a method of thermally bonding the nonwoven web in the present invention, it may be preferable to process using an embossing roll. The embossing process may be performed under the conditions of a bonding rate (ie, embossing area ratio) of 13% or less, and a non-embossing unit area of 0.2 mm ² or more, for example, 0.2 to 0.7 mm ^{2 .}

Here, the non-embossing unit area means the maximum area of a quadrangle inscribed in the embossing in the non-embossing unit of the minimum unit surrounded by the embossing unit on all sides. When embossing is performed under the conditions within this range, a nonwoven fabric having a larger bulkiness can be obtained while maintaining the required strength of the nonwoven fabric.

The bonding rate and non-embossing unit area can be adjusted by changing the embossing pattern. As a result of the embossing, the nonwoven fabric may include an embossing part and a non-embossing part, and the embossing part may include a plurality of unit embossing pattern parts continuously arranged at the same or different intervals in an open embossing type.

1 is a view for explaining the drawing state of the eco-friendly composite fiber spunbond nonwoven fabric containing plant-derived polyethylene according to an embodiment of the present invention.

1, the eco-friendly composite fiber spunbond nonwoven fabric containing plant-derived polyethylene according to an embodiment of the present invention is melted with a separate extruder, and the filaments spun with a nozzle capable of side-by-side spinning are cooled. After solidification, a nonwoven web is formed by integrating drawn filaments having a small fiber diameter on a continuously driven porous screen belt through a drawing process. At this time, the first component (A) containing polypropylene and the second component (B) containing plant-derived polyethylene generate crimp in the filament due to side-by-side spinning during stretching. As described above, the eco-friendly composite fiber spunbond nonwoven fabric containing plant-derived polyethylene according to the present invention has a complex structure in which crimps are formed on the composite fiber filament to form a thick nonwoven fabric. As such, the present invention can secure the physical properties of the high-loft nonwoven fabric through the crimp structure of the composite fiber filament.

Eco-friendly composite fiber spunbond nonwoven fabric containing plant-derived polyethylene according to an embodiment of the present invention is a diaper, absorbent article, toilet article, sanitary napkin, support layer or top sheet, back sheet , may be Side Gather.

Hereinafter, the configuration of the present invention and its effects will be described in more detail through Examples and Comparative Examples. However, these examples are for describing the present invention in detail, and the scope of the present invention is not limited to these examples.

[Example]

[Example 1]

70% by weight of polypropylene resin and 30% by weight of plant-derived polyethylene resin are put into each extruder and kneaded, then melt-spun through a nozzle with a plurality of holes, and filaments are randomly accumulated on a porous conveyor belt. A nonwoven fabric having a weight of 25 gsm was prepared by thermocompression bonding through an embossing roll.

At this time, the polypropylene polymer (PP) is LG Chemical's trade name H7700, and the melt flow index (MI: Melt Index) is 34 g/10 min. In addition, the plant-derived polyethylene polymer (Bio PE) is SHA7260 from Braskem, Brazil, and has a Melt Index (MI) of 20 g/10 min.

[Example 2]

A nonwoven fabric was prepared in the same manner as in Example 1, except that 50% by weight of polypropylene resin and 50% by weight of plant-derived polyethylene resin were added.

[Comparative Example 1]

A nonwoven fabric was prepared in the same manner as in Example 1, except that 80% by weight of polypropylene resin and 20% by weight of plant-derived polyethylene resin were added.

[Comparative Example 2]

A nonwoven fabric was prepared in the same manner as in Example 1, except that 40% by weight of polypropylene resin and 60% by weight of plant-derived polyethylene resin were added.

[Comparative Example 3]

A nonwoven fabric was prepared in the same manner as in Example 1, except that the plant-derived polyethylene resin had a melt flow index of 30 g/10 min.

[Comparative Example 4]

A nonwoven fabric was prepared in the same manner as in Example 1, except that the plant-derived polyethylene resin had a melt flow index of 10 g/10 min.

[Comparative Example 5]

A nonwoven fabric was prepared in the same manner as in Example 1, except that the polypropylene resin had a melt flow index of 70 g/10 min.

[Comparative Example 6]

A nonwoven fabric was prepared in the same manner as in Example 1, except that the polypropylene resin had a melt flow index of 18 g/10 min.

[Comparative Example 7]

A nonwoven fabric was prepared in the same manner as in Example 1, except that petroleum-derived polyethylene resin was used instead of plant-derived polyethylene. At this time, the petroleum-derived polyethylene polymer (PE) is MM810 of SK Chemical, and the melt flow index (MI: Melt Index) is 30 g/10 min.

[Comparative Example 8]

A nonwoven fabric was prepared in the same manner as in Example 2, except that petroleum-derived polyethylene resin was used instead of plant-derived polyethylene. At this time, the petroleum-derived polyethylene polymer (PE) is MM810 of SK Chemical, and the melt flow index (MI: Melt Index) is 30 g/10 min.

[Experimental example]

For the nonwoven fabrics prepared according to the Examples and Comparative Examples, each physical property was measured and evaluated as follows.

(1) Weight measurement

The weight was measured according to the INDA Standard Test (IST) method number WSP 130.1 as a test method.

(2) Measurement of Tensile strength and Elongation

As a test method, tensile strength was measured according to INDA Standard Test (IST) method number WSP 110.4.

(3) Measurement of HOM (Handle-o-meter)

As a test method, the HOM value was measured according to INDA Standard Test (IST) Method No. WSP 90.3.

(4) thickness measurement

As a test method, the thickness was measured according to INDA Standard Test (IST) method number WSP 120.1.

(5) Carbon emission measurement

The carbon emissions of petroleum-derived polypropylene and petroleum-derived polyethylene refer to the homo-polypropylene production data in the national LCI database information network.

For the carbon emission amount of plant-derived polyethylene, reference was made to data provided by Braskem of Brazil, a manufacturer of plant-derived polyethylene SHA7260 used in Examples and Comparative Examples.

The physical properties according to Examples 1 and 2 and Comparative Examples 1 to 8 and the experimental results measured according to the above experimental examples are shown in Tables 1 and 2 below.

Examples 1 and 2 use a polypropylene resin as the first component of the composite fiber and use a plant-derived polyethylene resin as the second component, and the weight ratio and melt flow index between the first component and the second component are required in this specification. satisfy the condition that Such Examples 1 and 2 have a thickness of 0.71 mm and 0.62 mm, respectively, which satisfies the thickness condition of 0.6 to 0.8 mm, and the HOM measurement value is 2.9 gf and 3.3 gf, which satisfy the HOM condition, which is required as a high loft nonwoven fabric. It can be seen that it has a thickness and softness.

However, Comparative Examples 1 and 2, which do not satisfy the condition that the content (% by weight) of the polypropylene resin and the plant-derived polyethylene resin are 70:30 to 50:50, have a thickness of 0.48mm and 0.88mm, respectively, and the HOM measurement result is At 5.5 gf and 1.8 gf, respectively, it can be seen that the high-loft nonwoven fabric did not achieve adequate physical properties either because it was too thin and had excessively soft properties, or because it was too thick and had insufficient soft properties.

In addition, Comparative Example 3, in which the melt flow index of plant-derived polyethylene is higher than the condition, has a thickness of 0.39 mm and a HOM measurement result of 5.1 gf, indicating that the thickness is too thin and the nonwoven fabric does not have softness.

In addition, it can be seen that Comparative Example 4, in which the melt flow index of plant-derived polyethylene is lower than the condition, cannot form a normal nonwoven fabric because spinning is impossible.

In addition, it can be seen that Comparative Example 5, in which the difference in the melt flow index between the plant-derived polyethylene and the polypropylene is excessively large, cannot be spun and thus cannot form a normal nonwoven fabric.

In addition, Comparative Example 6, in which the melt flow index of the polypropylene resin is lower than 25 g/10 min and lower than the melt flow index of plant-derived polyethylene, has a thickness of 0.38 mm and a HOM measurement result of 5.2 gf, which is too thin and lacks softness. It can be seen that proper physical properties were not achieved with the loft nonwoven fabric.

In addition, Comparative Examples 7 and 8 using petroleum-derived polyethylene instead of plant-derived polyethylene produced 4595 and 4708 kgCo ₂ eq/ton of carbon dioxide emissions during incineration, respectively, and it can be seen that the carbon dioxide emission was excessive, so that eco-friendly characteristics could not be achieved.

As described above, according to an eco-friendly composite fiber spunbond nonwoven fabric containing plant-derived polyethylene according to an embodiment of the present invention and a manufacturing method thereof, plant-derived polyethylene (Bio-PE), an eco-friendly material, compared to the existing high-loft nonwoven fabric Thickness and soft properties are improved, including carbon dioxide reduction effect. More specifically, in the case of a side-by-side high loft made of a conventional polypropylene material, the thickness is about 0.62mm, while the present invention is thicker than about 0.62mm to 0.71mm, and the HOM value is softer to 2.9gf to 3.2gf. can be checked

Although the preferred embodiment of the present invention has been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements by those skilled in the art using the basic concept of the present invention as defined in the following claims are also provided. is within the scope of the

A: Filament spun with a first component comprising polypropylene
B: filaments spun with a second component containing plant-derived polyethylene

Claims (14)

a first component comprising polypropylene; and
a second component comprising plant-derived polyethylene;
It is manufactured by compound spinning,
The viscosity and melting point of the first component is higher than that of the second component,
It is manufactured as a nonwoven fabric by thermal bonding using an emboss roll at a thermal bonding temperature of 144 to 152 ° C.
having a thickness of 0.6 to 0.8 mm,
An eco-friendly composite fiber spunbond nonwoven fabric containing plant-derived polyethylene, with a measurement result of HOM (Handle-o-meter) of 2.5 to 4.5 gf.
According to claim 1,
The melting point of the first component is 150 ~ 170 ℃, the melt flow index is 25 ~ 60g / 10 minutes, eco-friendly composite fiber spunbond nonwoven fabric containing plant-derived polyethylene.
3. The method of claim 2,
The melting point of the second component is 120 ~ 130 ℃, the melt flow index is 16 ~ 24g / 10 minutes, eco-friendly composite fiber spunbond nonwoven fabric containing plant-derived polyethylene.
4. according to any one of claims 2 or 3,
The difference in the melt flow index of the first component and the melt flow index of the second component is 20 g/10 minutes or less, an eco-friendly composite fiber spunbond nonwoven fabric containing plant-derived polyethylene.
According to claim 1,
The first component and the second component have a weight ratio of 70:30 to 50:50, eco-friendly composite fiber spunbond nonwoven fabric containing plant-derived polyethylene.
According to claim 1,
The second component is an eco-friendly composite fiber spunbond nonwoven fabric containing plant-derived polyethylene, ^{wherein carbon dioxide is emitted at 1,350 kgCO 2} eq/ton or less when the second component is spun alone and incinerated.
7. The method of claim 6,
The composite fiber spunbond nonwoven fabric is an eco-friendly composite fiber spunbond nonwoven fabric containing plant-derived polyethylene, which emits less than ^{4,000 kgCO 2 eq/ton of carbon dioxide when incinerated.}
delete delete According to claim 1,
An eco-friendly composite fiber spunbond nonwoven fabric containing plant-derived polyethylene, in which a part of the second component is exposed to the outside or spun in a side-by-side form.
delete According to claim 1,
Plant-derived, which is formed by melting the first component and the second component with separate extruders, spinning each polymer with a nozzle capable of side-by-side spinning, and solidifying the spun filaments by applying cooling air Eco-friendly composite fiber spunbond non-woven fabric containing polyethylene.
The first component containing polypropylene and the second component containing plant-derived polyethylene are melted with separate extruders, each polymer is spun with a nozzle capable of side-by-side spinning, and cooling air is applied to the spun filament. After solidification by application, the solidified filaments are stretched through a stretching process, and then the drawn filaments are integrated on a continuously driven porous screen belt to form a nonwoven web, and the integrated nonwoven web is heated at a heat bonding temperature of 144 to 152°C. It is formed by bonding with thermal bonding using embossing rolls to give shape stability of the nonwoven web,
The viscosity and melting point of the first component is higher than that of the second component,
The nonwoven web to which form stability is imparted has a thickness of 0.6 to 0.8 mm, and the measurement result of HOM (Handle-o-meter) is 2.5 to 4.5 gf, an eco-friendly composite fiber spunbond nonwoven fabric containing plant-derived polyethylene.
Melting the first component containing polypropylene and the second component containing plant-derived polyethylene with separate extruders, respectively, and spinning each polymer with a nozzle capable of side-by-side spinning;
After solidifying the spun filaments by applying cooling air, stretching the solidified filaments through a stretching process, and then integrating the drawn filaments on a continuously driven porous screen belt to form a nonwoven web; and
bonding the integrated nonwoven web at a thermal bonding temperature of 144 to 152° C. by thermal bonding using an embossing roll to give shape stability of the nonwoven web;
includes,
The viscosity and melting point of the first component is higher than that of the second component,
The nonwoven web to which form stability is imparted has a thickness of 0.6 to 0.8 mm, and the measurement result of HOM (Handle-o-meter) is 2.5 to 4.5 gf, A method for producing an eco-friendly composite fiber spunbond nonwoven fabric containing plant-derived polyethylene.

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