KR101231985B1 - Composite non-woven fabric comprising a composition derived from a plant and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a composite eco-friendly long-fiber nonwoven fabric containing a plant-derived composition, and a method for manufacturing the same. The present invention uses a filament constituting the nonwoven fabric as a vinegar type to place polypropylene in a core component and a plant-derived derivative in a plant component. A method for manufacturing a composite long fiber spunbond nonwoven fabric by placing one polyethylene, wherein the core component and the supercomponent are melted with separate extruders to spin each polymer with a composite spinning nozzle, and then the spun filament Giving solidified air to the cooling air, and then solidifying the filament into a stretched filament having a small fiber diameter through the stretching process; Integrating the drawn filaments on a continuously driven porous screen belt to form a nonwoven web; And imparting shape stability of the nonwoven web by combining the integrated nonwoven web in various ways such as thermal bonding.
The composite eco-friendly long-fiber nonwoven fabric containing the plant-derived composition of the present invention configured as described above is made of a polyethylene material constituting the primary side while combining the flexible property of the polyethylene long fiber and the low elongation and high rigidity property of the polypropylene long fiber. By replacing the derived polyethylene, it is possible to provide a soft composite long fiber spunbond nonwoven fabric using an eco-friendly material that can protect the global environment. In addition, since the plant-derived polyethylene material used in the composition of the present invention uses waste molasses, the problem of collision with food, which is emerging as a problem of biomass, can also be solved.

Description

Composite non-woven fabric comprising a composition derived from a plant and manufacturing method

The present invention relates to a composite environmentally friendly long-fiber nonwoven fabric containing a plant-derived composition and a method for producing the same, more particularly, by using a non-petroleum polymer by containing a polyethylene made by refining ethanol extracted from sugar cane in the polymer constituting the nonwoven fabric The present invention relates to a composite eco-friendly long-fiber nonwoven fabric having an excellent touch by reducing the amount of carbon dioxide produced according to the present invention and having a good touch.

Discovery and application of eco-friendly materials have been steadily progressing as global warming accelerates. In particular, polymers produced from fossil fuels have limitations in their reserves, and there is an urgent need to replace them with environmentally friendly materials due to high carbon dioxide emissions. However, the existing eco-friendly material has a disadvantage in that there are many parts that need to be improved for the actual commercialization due to the hydrolysis, radioactive defects, hard touch, etc., which are inherent characteristics of the material as the product has been developed with a focus on biodegradability. For example, Korean Patent Application No. 2002-0046821 discloses a nonwoven fabric manufactured by complex spinning with a polyethylene polymer and a manufacturing method thereof to improve the feel of a conventional polypropylene long fiber spunbond nonwoven fabric. It is not considered to be an eco-friendly material, and is Japanese Patent Application Laid-Open No. 7-48769 (1995), Japanese Patent Application Laid-Open No. 6-264343 (1994) and International Nonwovens Journal Vol.7, NO.2 PP69 (1995) describes a polylactic acid nonwoven fabric of spunbond technology in which long fibers are melt extruded and laminated to a screen to form a nonwoven web. However, Japanese Patent Laid-Open No. 7-48769 simply shows that a polylactic acid nonwoven fabric can be produced through spunbond technology, and does not describe a specific manufacturing method or performance, and Japanese Patent Laid-Open No. 6-264343. Although microbial degradable agricultural long-fiber aggregates are shown, the physical properties of the nonwovens are not described, as well as details of the manufacturing conditions. In addition, according to International Nonwovens Journal Vol.7, NO.2 PP69 (1995), only a polylactic acid spunbond that is hard to break and easily breakable can be obtained. In addition, in the case of the eco-friendly polymer used in the above inventions, the recent food shortages in developing countries and deforestation problems such as the Amazon River basin triggered the use of the material in the long-term perspective as a material that has become the center of global controversy. As a manufacturing method that needs to be tried, there is a demand for environmentally friendly fabrics according to new products and methods.

Patent Document 1: Republic of Korea Patent Application No. 2002-0046821 Patent Document 2: Japanese Patent Laid-Open No. 7-48769 Patent Document 3: Japanese Patent Laid-Open No. 6-264343

International Nonwovens Journal Vol. 7, NO.2 PP69 (1995).

Therefore, the present invention has been made in view of the above-described conventional situation, and the first object of the present invention is a spunbond nonwoven fabric containing polypropylene as a main component of the spunbonded natural spun polyethylene made from ethanol extracted from plants. By providing a long-fiber nonwoven fabric having excellent physical strength and excellent touch, it is to provide an eco-friendly long-fiber nonwoven fabric that can significantly reduce carbon dioxide generation compared to a nonwoven fabric composed of conventional petroleum polymer only.

It is another object of the present invention to provide a method capable of producing a composite eco-friendly long fiber nonwoven fabric having excellent touch properties and containing plant-derived composition with excellent workability, thus providing excellent touch and eco-friendliness without difficulty in the manufacturing process. And it is to provide a manufacturing method that can more easily produce a nonwoven fabric having both mechanical strength and good spinning properties.

The present invention may also be aimed at achieving, in addition to the above-mentioned specific objects, other objects which can be easily derived by those skilled in the art from this and the overall description of the present specification.

Method for producing a composite environmentally friendly long fiber nonwoven fabric containing a plant-derived composition of the present invention for achieving the above object;

The filament constituting the nonwoven fabric is made of a vinegar type, and a polypropylene is placed in the core component, and a polyethylene derived from a plant is placed in the core component to produce a composite long fiber spunbond nonwoven fabric.

The core component and the supercomponent are melted by separate extruders, each polymer is spun by a composite spinning nozzle, and the cooling filaments are imparted with cooling air to be solidified, and the solidified filaments are stretched into small fibers. Forming a stretched filament having a diameter;

Integrating the stretched filaments into a continuously driven porous screen belt to form a nonwoven web; And

Combining the integrated nonwoven web in various ways such as thermal bonding to impart form stability of the nonwoven web.

According to another configuration of the present invention, the core component consisting of the polypropylene of the myelin sheath filament and the herbaceous component consisting of polyethylene derived from plants are characterized in that the weight ratio of 50 ~ 80: 20 ~ 50.

According to another configuration of the present invention, the plant-derived polyethylene of the ultracomponent has a melting point of 125 ° C. or more, a melt index of 1 to 60 g / 10 min, and a melt density of 0.94 to 0.97 g / cm 3. do.

According to another configuration of the invention, the plant-derived polyethylene of the herb component is characterized in that it is obtained by extracting from waste molasses of sugar cane.

Composite eco-friendly long fiber nonwoven fabric containing the plant-derived composition of the present invention for achieving the above another object;

It is obtained according to the above-described manufacturing method of the present invention, and the basis weight of the spunbond nonwoven fabric is 15 to 100 g / m 2.

The composite eco-friendly long-fiber nonwoven fabric containing the plant-derived composition of the present invention configured as described above is made of a polyethylene material constituting the primary side while combining the flexible property of the polyethylene long fiber and the low elongation and high rigidity property of the polypropylene long fiber. By replacing the derived polyethylene, it is possible to provide a soft composite long fiber spunbond nonwoven fabric using an eco-friendly material that can protect the global environment. In addition, since the plant-derived polyethylene material used in the composition of the present invention uses waste molasses, the problem of collision with food, which is emerging as a problem of biomass, can also be solved.

Hereinafter, the present invention will be described in more detail with reference to preferred embodiments.

The composite eco-friendly long-fiber nonwoven fabric having excellent touch and containing plant-derived composition according to a preferred embodiment of the present invention has a filament constituting the nonwoven fabric as a vinegar type, so that a polypropylene polymer is placed in the core component and described below in the super component. A composite long-fiber spunbond nonwoven fabric obtained by making a cane-derived polyethylene, wherein the long fibers constituting the composite long-fiber nonwoven fabric are melted in separate extruders according to the constituents of each polymer. The melt is fed through a spin pump that feeds the radiation beam and the melt flow path spins through the distribution plate to the nozzle, while the polypropylene is positioned inside the composite section, while the ethanol extracted from sugar cane is dehydrated and purified. One polyethylene is placed on the outside, Fibers which solidify, stretch, and crystallized by stretching are prepared by integrating webs on a spin belt in the form of a web, and then bonding by heat bonding or other various known methods.

At this time, the fiber constituting the nonwoven fabric is required to technology for complex spinning two different polymers in the form of a poncho, which combines the low-strength, high-strength characteristics of the polypropylene long fiber and the flexibility of the polyethylene long fiber as well as the existing By replacing petroleum-based polyethylene with ethanol extracted from sugar cane with polyethylene, which is dehydrated and refined, it is possible to maximize the carbon dioxide reduction effect.

According to another preferred embodiment of the present invention, the polypropylene and the plant-derived polyethylene are preferably composed of a weight ratio of 50 to 80:20 to 50. Most preferably, the core component and the vinegar component of the vinegar filament are composed of a weight ratio of 50:50. If the composition ratio of the polypropylene constituting the core component is less than 50% by weight, the low elongation and high stiffness characteristics of the filament may be reduced, thereby reducing the physical properties of the nonwoven fabric. If the amount is less than the weight%, the amount of eco-friendly materials is reduced in the entire nonwoven fabric, and thus the carbon dioxide (CO ₂ ) reduction effect is greatly reduced, which is not preferable.

In another embodiment of the present invention, the polypropylene constituting the core component has a melting point of 120 ° C. or higher, excellently 150 ° C. or higher, a melt index of 15 to 60 g / 10 min, and a melt density of 0.9 g / One having a characteristic of cm ³ (230 ° C.) is used.

 Moreover, in another embodiment of this invention, melting | fusing point of the plant origin polyethylene which forms the exterior of a composite cross section is 100 degreeC or more, Preferably it is 120 degreeC or more. In addition, the melt index is used having a characteristic of 20 to 35g / 10 minutes.

In order to produce a composite eco-friendly long fiber spunbond nonwoven fabric having excellent touch and containing plant-derived composition according to the present invention, the melting temperature of the PP extruder is set at a melting point + 80 ° C to + 120 ° C. The eco-friendly polyethylene resin constituting the supercomponent of the composite cross section is melted through an extruder separate from the extruder for melting the core component, and the melting temperature is set at a melting point of + 60 ° C to + 100 ° C. However, when the flowability of the heterogeneous polymer constituting the composite filament is significantly different, the polymer radiated from the nozzle may be broken or bent, which may cause a problem in forming the nonwoven web. Therefore, temperature and pressure are adjusted in consideration of the MI difference of a heterogeneous polymer.

Each polymer is fed through a spin pump that feeds the melt into the radiation beam and is emitted to the nozzle through a distribution plate designed to form the pleated filaments. At this time, the PP is located inside the poncho filament to maintain mechanical stiffness, and the plant-derived polyethylene is located outside to express soft properties. The spun filament is drawn downward in the vertical direction of 0.5 m to 5 m in length by the suction force generated at the bottom of the screen belt at the same time as the cooling air at a temperature of about 15 ℃ to 25 ℃ supplied to solidify the polymer in the closed chamber. At this time, the speed of the fiber is about 2000m / min to 6000m / min. The stretched filaments are formed by forming nonwoven webs in various ways such as venturis and impingement plates located between the drawing sections and the screen belts on which the webs are laminated. The integrated nonwoven web is then combined by thermocompression or the like to complete the nonwoven form.

The bonding method is not limited to thermocompression bonding, and the nonwoven fabric sheet may be made by combining in a manner such as spunlace bonding with high pressure water, ultrasonic bonding bonding with ultrasonic waves, and needle punching bonding with needle punching.

According to another preferred embodiment of the present invention, the plant-derived polyethylene used in the composition of the present invention as described above is not limited thereto, but preferably ethanol is extracted through yeast fermentation from plants such as sugar cane. Polyethylene produced by catalytic polymerization after the intramolecular dehydration purification process. The commercially available plant-derived polyethylene material has a melt index of 1 to 20 g / 10 min, which is different from the flow index of polypropylene constituting the core component. Large differences can occur depending on the form. Therefore, it is very important to control the flowability of the heteropolymer constituting the composite fiber to secure stable spinning. In general, since the polymer synthetic resin is greatly improved as the temperature increases, the flowability between materials with low flowability is minimized by spinning up the melting conditions of materials with low flowability.

One specific example of a suitable plant-derived polyethylene that can be used in the present invention is available under the name "Bio-PE" belonging to Braschem's Green Plastics family.

According to another embodiment of the present invention, the melt index of the plant-derived polyethylene is suitable from about 2 to 60 and this value is determined by the extruded flow meter orifice when a load of 2.16 KG is applied for 10 minutes at any temperature (eg 190 ° C.). Weight in grams of polymer that can be forced through a diameter of 0.0825 inches).

According to another embodiment of the present invention, it is preferable that the plant-derived polyethylene uses a high density polyethylene having a melt density in the range of 0.94 to 0.97.

Conventional first generation bio raw materials represented by polylactic acid have been at the center of the controversy due to the production method of extracting from corn, which can be used as a food resource, as a food shortage situation in developing countries occurs. Plant-derived polyethylene, which is used according to its composition, is attracting attention as a second-generation bio raw material, and is grown by converting vast Brazilian pastures or savannahs, so that there is no competition for arable land with other crops such as corn soybeans and sugar cane itself with ethanol. Rather than converting, as shown below, refinement of sugar in sugar cane and use of the remaining waste molasses has no effect on sugar production. In addition, all of the energy used to extract polyethylene from waste molasses through ethanol is used to minimize the use of petroleum energy because it uses bagas (sugarcane residue), which is produced when sugar is refined from sugar cane. .

In addition, since the plant-derived polyethylene material used in the composition of the present invention is based on plant resources other than petroleum, the greenhouse gas reduction effect is also very large, thus reducing the carbon dioxide of -5ton CO ₂ / ton PE compared to the conventional petroleum-based polyethylene. Has an effect. However, the commercialized plant-derived polyethylene has a problem that its melt index does not exceed 20, so it is possible to solve the problems in the production process by ensuring the flowability of the polymer suitable for compounding by controlling the temperature and pressure of the extruder, and the touch is excellent. And it was possible to manufacture a composite eco-friendly long fiber nonwoven fabric containing a plant-derived composition.

The polypropylene of the core component used in the present invention is set at an extruder temperature of 210 ° C to 250 ° C, and the plant-derived polyethylene is set at an extruder temperature of 210 ° C to 250 ° C and at 220 ° C to the same as the polypropylene in the final beam part. Stable radioactivity was secured by spinning at 240 ° C.

According to another embodiment of the present invention, when the weight ratio of the plant-derived polyethylene constituting the herbaceous component in the proportion of the vinegar component constituting the filament is less than 20% by weight, the content of the herbaceous component is small and it is difficult to exhibit soft characteristics. _{2 The} reduction effect is greatly reduced, making it unsuitable for classifying eco-friendly materials. On the contrary, when the polyethylene constituting the primary component is composed of 50% by weight or more, the polypropylene of the core component is relatively low, so the touch is excellent, but the mechanical strength and physical properties are significantly lowered, which may be a problem in commercialization. Therefore, in the present invention, the composition ratio of the plant-derived polyethylene was set to 20 to 50%.

Hereinafter, the present invention will be described in more detail with reference to examples, but it goes without saying that the scope of the present invention is not limited to these examples.

In the following examples and comparative examples, physical property values were determined by:

(1) Melt Index, MI (g / 10min): Analyzed at 210 ° C according to ASTM-D-1238

(2) Weight (gsm): EDANA 40.3-90

(3) Tensile strength (kg / 5cm): EDANA 20.2-89

(4) Lecture (mm): Bending Length, WSP 90.5

Example 1

The extruder temperature of the core component is 230 ° C. The extruder temperature of the core component is 230 ° C using polypropylene having a melting point of 165 ° C and a MI of 35 as the core component and a plant-derived polyethylene having a melting point of 125 ° C and a MI of 20. Melted the raw material at 230 ° C. The molten polymer was moved to a separate flow path by a distribution plate in the composite spinning spin beam and spun into a composite cross-sectional eccho form to form filaments. At this time, the weight ratio of the initial component and the core component constituting the fiber was 50:50. The spun filaments are laminated to a porous spin belt to form a web, and the web is bonded to prepare a final nonwoven fabric.

Example 2

A nonwoven fabric was produced in the same manner as in Example 1 except that the constituent weight ratio of the initial component and the core component was 30:70.

Example 3

A nonwoven fabric was produced in the same manner as in Example 1 except that the constituent weight ratio of the initial component and the core component was 20:80.

Comparative Example 1

A nonwoven fabric was produced in the same manner as in Example 1 except that the constituent weight ratio of the initial component and the core component was 10:90.

Comparative Example 2

A nonwoven fabric was produced in the same manner as in Example 1 except that the constituent weight ratio of the initial component and the core component was 90:10.

Comparative Example 3

A nonwoven fabric was prepared in the same manner as in Example 1, except that the first component constituting the nonwoven fabric was a petroleum polyethylene having a melting point of 125 ° C. and a MI of 30 g / 10 min. It was.

Comparative Example 4

A nonwoven fabric was prepared in the same manner as in Example 1, except that the first component constituting the nonwoven fabric was a petroleum polyethylene having a melting point of 140 ° C. and a MI of 30 g / 10 min. It was.

Analysis ratio weight burglar Shinto Lecture room
four
castle Bio PE PP MD CD MD CD MD Ingredient Ingredient gsm Kg / 5cm % mm Example 1 50 50 40 4.7 2.3 163 205 35 ○ Example 2 30 70 40 4.7 2.4 160 202 41 ○ Example 3 20 80 40 4.6 2.4 160 209 40 ○ Comparative Example 1 10 90 40 4.9 2.7 125 187 47 △ Comparative Example 2 90 10 40 3.8 1.9 165 208 26 X Comparative Example 3 30 70 40 4.8 2.5 161 198 44 ○ Comparative Example 4 50 50 40 4.6 2.4 158 211 40 ○

※ Radioactivity is indicated as ○ / △ / X depending on rain, rain or rain

Claims (5)

In the method for producing a composite long-fiber spunbond nonwoven fabric by placing the filaments constituting the nonwoven fabric in the form of the heart sheath, polypropylene in the core component, and polyethylene derived from the plant in the super component.
The core component and the supercomponent are melted by separate extruders, each polymer is spun by a composite spinning nozzle, and the cooling filaments are imparted with cooling air to be solidified, and the solidified filaments are stretched into small fibers. A stretched filament having a diameter, wherein the core polypropylene is set at an extruder temperature of 210 ° C. to 250 ° C., and the plant-derived polyethylene of the super ingredient has a melting point of 125 ° C. and a melt index of 20 to 60 g / 10 min. The melt density is between 0.94 and 0.97 g / cm 3, which is set at an extruder temperature of 210 ° C. to 250 ° C. and set at 220 ° C. to 240 ° C. in the final beam portion, in the same manner as polypropylene;
Integrating the drawn filaments on a continuously driven porous screen belt to form a nonwoven web; And
Combining the integrated nonwoven web by any one method selected from thermocompression, spunlace, ultrasonic bonding, or needle punching methods to impart morphological stability of the nonwoven web. Manufacturing method of composite eco-friendly long fiber nonwoven fabric.
[Claim 2] The plant-derived composition according to claim 1, wherein the heart component composed of polypropylene of the herbicidal filament and the herbicidal component composed of polyethylene derived from a plant are composed of a weight ratio of 50 to 80:20 to 50. A method of manufacturing a composite eco-friendly long fiber nonwoven fabric.
delete The method according to claim 1, wherein the plant-derived polyethylene of the herb component is obtained by extracting from waste molasses of sugar cane.
The composite eco-friendly long fiber nonwoven fabric containing the plant-derived composition obtained by the manufacturing method of any one of Claims 1, 2 or 4 and whose basis weight of a spunbond nonwoven fabric is 15-100 g / m <2>.