KR101267673B1 - 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 relates to a filament constituting the nonwoven fabric with a vinegar type, wherein a polylactic acid derived from a plant is placed in a core component, There is a method for producing a composite long-fiber spunbond nonwoven fabric by placing a plant-derived polyethylene, wherein the core component and the herb component are melted by a separate extruder to spin each polymer with a composite spinning nozzle After the solidified by imparting cooling air to the spun filament after the step, the solidified filament to 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 of the present invention configured as described above is 100% by supplementing the low elongation and rigidity of the polylactic acid long fiber with the flexible property of the polyethylene long fiber, and at the same time replacing the polyethylene material constituting the ultra-side with plant-derived polyethylene. To provide a soft composite long fiber spunbond nonwoven fabric that uses eco-friendly materials to protect the global environment. In addition, since the waste molasses is used to increase the proportion of the plant-derived polyethylene material used in the composition of the present invention, the problem of collision with food, which is emerging as a problem of biomass such as polylactic acid, can be solved.

Description

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

The present invention relates to a composite eco-friendly long-fiber nonwoven fabric containing a plant-derived composition and a method for producing the same, and more particularly, to a polymer constituting the nonwoven fabric containing polyethylene and polylactic acid extracted from corn ethanol extracted from sugar cane. The present invention relates to a composite eco-friendly long-fiber nonwoven fabric having a superior touch with a non-woven fabric and a method of manufacturing the same, together with an effect of reducing the amount of carbon dioxide generated by the use of a non-petroleum polymer.

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 Application 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 of a spunbond nonwoven fabric, a spunbonded natural polyethylene made from ethanol extracted from plants and polylactic acid extracted from corn composite spinning By supplementing the hard touch or physical property deterioration of polylactic acid and providing long-fiber nonwoven fabric with excellent touch, it is an eco-friendly sheet that can dramatically reduce carbon dioxide generation and increase the biodegradability of nonwoven fabrics, compared to nonwoven fabrics composed only of existing petroleum polymers. It is for providing a fiber nonwoven fabric.

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 directed to accomplish these and other objects, which can be easily derived by those skilled in the art from the overall description of the present specification, in addition to the above-mentioned and obvious objects.

Composite eco-friendly long fiber nonwoven fabric containing the plant-derived composition of the present invention for achieving the above object and a method for producing the same;

The filament constituting the nonwoven fabric is a herbaceous form, and a polylactic acid is placed in the core component, and a plant-derived polyethylene 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 heart component consisting of the polylactic acid 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 herb component has a melting point of 125 ° C. or more, a melt index of 1 to 60 g / 10 min, a melt density of 0.94 to 0.97 g / cm 3, and sugarcane It is characterized by using the extract obtained from waste molasses.

According to another configuration of the present invention, the polylactic acid of the core component is indirectly prepared from a dimer of lactic acid by raw material produced by a method directly prepared by condensation polymerization of plant-derived lactic acid, or ring-opening polymerization. It is characterized by using a polylactic acid.

According to still another aspect of the present invention, the polylactic acid of the core component has a melt index (MI: melt index 210 ° C.) of 15 to 60 g / 10 min, and is obtained by extracting from corn.

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 a flexible property of the polyethylene long fiber to complement the properties such as radioactive deterioration and hardness of the polylactic acid long fiber, and at the same time constitute the polyethylene side By replacing the material with plant-derived polyethylene, it is possible to provide a soft composite long-fiber spunbonded nonwoven fabric with 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. In addition, it is possible to provide a 100% eco-friendly material long-fiber spunbond nonwoven fabric by constructing all the polymer material constituting the heart plant with an environmentally friendly material.

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 polylactic acid 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 is radiated to the nozzle through a determined distribution plate, where the polylactic acid is located inside the composite section, while the ethanol extracted from sugar cane is dehydrated and purified. A polyethylene is placed on the outside to solidify the polymer being spun High, stretched, stretched and crystallized fibers are fabricated 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 combine the two different polymers in the form of a composite spinning in the form of the vinegar, which is complemented by combining the softness of polyethylene filament with the radioactive degradation and hard touch of the polylactic acid long fiber Of course, by replacing the existing petroleum-based polyethylene material with ethanol extracted from sugarcane with dehydrated and refined polyethylene material, two different polymers are composed of eco-friendly materials, which are 100% eco-friendly non-woven fabrics and maximize the effect of reducing carbon dioxide. can do.

According to another preferred embodiment of the present invention, the polylactic acid and the plant-derived polyethylene is 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 polylactic acid constituting the core component is less than 50% by weight, the low elongation and high stiffness characteristics of the filament may be reduced, and thus the physical properties of the nonwoven fabric may be deteriorated. If it is less than% by weight, it is difficult to supplement the polylactic acid-specific hardness with plant-derived polyethylene.

In another embodiment of the present invention, the polylactic acid constituting the core component typically has a melting point of about 100 ° C. to about 240 ° C., in some embodiments from about 120 ° C. to about 220 ° C., and in some embodiments from about 140 ° C. to About 200 ° C. These low melting polylactic acids are useful in that they biodegrade at high speed. The glass transition temperature (“Tg”) of polylactic acid is also relatively low to improve the solubility and processability of the polymer. For example, the Tg may be about 80 ° C. or less, in some embodiments about 70 ° C. or less, and in some embodiments about 65 ° C. or less.

 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 compositions according to the present invention, the melting temperature of the polylactic acid 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 polylactic acid is located inside the pleated filament to maintain mechanical rigidity, 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 compared with the flow index of the polylactic acid 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 suitably about 2 to 60 g / 10 min, which is an extruded flow meter when a load of 2.16 KG is applied for 10 minutes at any temperature (eg 190 ° C.). The weight in grams of polymer that can be forced through an orifice (0.0825 inches in diameter).

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 g / cm 3.

Conventional first generation bio raw materials, which are 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 occurs in developing countries. Therefore, the present invention can minimize the collision with the food resources according to the compounding ratio by complex spinning not only polylactic acid but also plant-derived polyethylene. Plant-derived polyethylene used according to the configuration of the present invention described above is a material that is attracting attention as a second-generation bio raw material, by cultivating the vast Brazilian grassland or savannah by cultivating it, as well as no competition for arable land with other crops such as corn and soybeans. Rather than converting itself to ethanol, the sugar produced from sugar cane is refined and the remaining waste molasses is used, as shown below, which 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 polylactic acid 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 the two heteropolymers are equal to 220 in the final beam portion. Stable radioactivity was secured by spinning at a temperature ranging from 0 ° C to 240 ° C.

Write the content of the In still another embodiment of the invention, if the weight ratio of the plant-derived polyethylene constituting the sheath component according to the ratio of core to sheath component was less than 20% constituting the filaments, the sheath component is difficult to indicate a soft characteristic, CO ₂ The reduction effect is greatly reduced. On the contrary, when the polyethylene constituting the primary component is composed of 50% or more, the polylactic acid 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, the 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 polylactic acid having a melting point of 165 ° C and a MI of about 15 to 30 is used as the core component, and the extruder temperature of the core component and the initial component is 225 ° C using a plant-derived polyethylene having a melting point of 125 ° C and a MI of 20. The raw material was melted. 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 were laminated on a porous spin belt to form a web, and the web was subjected to a bonding process to produce a final nonwoven fabric.

Example 2

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

Example 3

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

Comparative Example 1

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

Comparative Example 2

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

Analysis ratio weight burglar Shindo room
four
castle Ingredient Ingredient MD CD MD CD gsm Kg / 5cm % Example 1 50 50 40 6.4 3.1 54 73 ○ Example 2 30 70 40 7.5 3.6 68 86 ○ Example 3 20 80 40 7.8 3.6 61 70 ○ Comparative Example 1 10 90 40 7.4 3.8 62 75 △ Comparative Example 2 90 10 40 3.7 2.4 98 102 X

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

Claims (5)

A method for producing a composite long-fiber spunbond nonwoven fabric comprising filaments constituting the nonwoven fabric having a vinegar type, with polylactic acid placed in the core component and polyethylene derived from a plant placed in the supercomponent 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. Forming a stretched filament having a diameter; Here, the polylactic acid of the core component is the extruder temperature is set to the melting point of the polylactic acid + 80 to 120 ℃, the plant-derived polyethylene of the herbal component is 125 ℃ melting temperature is 20 to 60g / 10min and 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 polylactic acid;
Integrating the drawn filaments on a continuously driven porous screen belt to form a nonwoven web; And
Method for producing a composite eco-friendly long-fiber nonwoven fabric containing a plant-derived composition comprising the step of combining the integrated nonwoven web by heat bonding or needle punching to impart morphological stability of the nonwoven web.
The plant-derived composition according to claim 1, wherein the heart component consisting of the polylactic acid of the herbaceous filament and the herbaceous component consisting 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 polylactic acid of claim 1, wherein the polylactic acid of the shim component is a raw material produced using a method directly prepared by condensation polymerization of plant-derived lactic acid, or a polylactic acid indirectly prepared from a dimer of lactic acid by ring-opening polymerization. Method for producing a composite eco-friendly long fiber nonwoven fabric containing a plant-derived composition, characterized in that using.
Claims 1, 2 and 4 of claim 1, wherein the spunbond nonwoven fabric has a basis weight of 15 to 100g / ㎡ composite eco-friendly long fiber containing a plant-derived composition Non-woven.