KR101561457B1 - Thermally Adhesive Composite Fibers Using Biomass and and Method Preparing Same - Google Patents

Abstract

The present invention may include: a melting step of respectively injecting and melting a first component and a second component in different extruders, wherein the first component is one among polyester resins, biodegradable polyester resins, and biomass polyester resins, and the second component is biomass polyethylene resins whose melting point is 10-40°C lower than the first component; an antioxidant adding step of adding an antioxidant before or while the first and the second components are melting; a spinning step of spinning the melted first and second components in a composite spinning machine; a stretching step of stretching the spun composite fibers; a crimp forming step of applying a crimp to the stretched composite fibers; and a cutting step of cutting the thermally adhesive composite fibers after the crimp formation.

Description

TECHNICAL FIELD [0001] The present invention relates to a thermally adhesive type conjugate fiber using biomass,

The present invention relates to a heat-bondable conjugate fiber using biomass, and relates to a heat-bondable conjugate fiber using an environment-friendly biomass and an environmentally friendly biomass with less skin irritation, and a method for producing the same.

The search for and application of environmentally friendly materials has been progressing steadily as global warming accelerates. Polymers produced from fossil fuels, such as petroleum, are limited in their reserves, and the emission of carbon dioxide is high, so it is urgent to replace them with environmentally friendly materials. However, existing eco-friendly materials have been disadvantageous in that there are many parts that need improvement in order to commercialize them due to hydrolysis, radioactive defect, and hard touch, which are unique characteristics of the material, as products are mainly focused on biodegradability.

Recently, textile products using environmentally friendly materials using biomass have been actively developed and are being launched as products.

Biomass is a method of collecting biomass energy such as methane, ethanol, and hydrogen by pyrolyzing or fermenting an organism in terms of biomass or biomass. The amount of biomass increases with the production of biomass, which is the amount of accumulation that subtracts the amount of respiration, loss of decay, In the ecosystem, the biomass of the low-nutrient biomass is high, and the biomass of the high-order biomass is low.

Biomass is a cycle of material circulation in the biosphere of the earth that decomposes microbes into microbes and reduces them to minerals. Instead of these microbes, humans use them as energy or organic materials.

Petroleum, which occupies a large portion of the present energy source, is expected to be depleted in the near future. Research on biomass utilization has become active in many countries around the world since the second oil crisis began in late 1978 .

Due to these social phenomena, the environment in the textile industry is less burdensome, and a variety of fibers and textile materials are attracting attention using biomass.

Korean Patent No. 1231985 discloses a method for producing a composite filament spunbonded nonwoven fabric by using a core-sheath filament constituting a nonwoven fabric, a polylactic acid as a core component, and a polyethylene derived from a plant as a supercritical component, have. Generally, the spunbonded nonwoven fabric is produced in one process, which is advantageous in terms of processability and low manufacturing cost, but has a problem that the nonwoven fabric has high density and low bulkiness, and its application is limited.

In particular, recently, the performance of nonwoven fabrics used for sanitary materials such as sanitary napkins and diapers has been diversified, and functions such as high elasticity, high bulkiness and absorption / water repellency have been emphasized. Has been developed. Particularly, in order to improve the liquid permeation function and the absorption function, there is a growing demand for bulk nonwoven fabrics having a large void, but the spunbond nonwoven fabric can not satisfy such a demand of consumers.

The present invention has been made to solve the above problems, and it is an object of the present invention to provide a method for manufacturing a heat-bondable conjugate fiber using biomass which is less environmentally sensitive and less irritating to skin through a resin using biomass.

Another object of the present invention is to provide a heat-bonding type conjugate fiber in which a diaper, a sanitary napkin or the like is biomass suitable for sanitary materials.

The present invention relates to a first component which is one of a polyester resin, a biodegradable polyester resin and a biomass polyester resin, and a biomass polyethylene resin having a melting point lower by 10 to 40 캜 than the first component, A melting step of putting the first component and the second component in separate extruders and melting them; An antioxidant addition step of adding an antioxidant before or during melting the second component or the first component and the second component; A spinning step of flowing the molten first component and the second component into a composite spinning device and spinning; A stretching step of stretching the spun conjugated fiber; A crimp forming step of applying a crimp to the stretched conjugate fiber; And a cutting step of cutting the thermo-adhesive type conjugate fiber after the crimp forming step. The present invention also provides a method of manufacturing a thermo-adhesive type conjugate fiber using the biomass.

In addition, in the step of adding the antioxidant, the antioxidant may be one selected from the group consisting of a phenol-based antioxidant, a phosphorous ester-based antioxidant, a thioester-based antioxidant, an aromatic amine-based antioxidant, Or a mixture of two or more antioxidants. The present invention also provides a method for producing a heat-bondable conjugate fiber using the biomass.

Also, in the step of adding the antioxidant, the antioxidant contains 200 to 4000 ppm of the weight of the heat-bondable conjugate fiber, and a method of manufacturing the heat-bondable conjugate fiber using the biomass.

Also, in the step of adding the antioxidant, 0.1 to 20% by weight of an inorganic additive is further added to the first component, the second component, or the first component and the second component. And a manufacturing method thereof.

In the spinning step, the core-sheath may be combined with the core-sheath concentric core, the core-sheath eccentric type, and the side-by-side type, The present invention also provides a method for manufacturing a heat-bondable conjugate fiber using the biomass.

The present invention also provides a heat-bondable conjugate fiber using the biomass, which is produced by the above-described method.

Further, there is provided a nonwoven fabric comprising the heat-bondable composite fiber produced by the above-mentioned production method.

As described above, there is an effect of providing a fiber material having less skin irritation and being environment-friendly by using the heat-bonding type conjugate fiber and the spherical biomass according to the present invention.

Further, the heat-bondable conjugate fiber using the biomass of the present invention can be used in various industrial fields, and is particularly suitable for sanitary materials such as diapers and sanitary napkins contained in the manufacture of nonwoven fabrics.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a process diagram of a method for manufacturing a heat-bondable conjugate fiber using the biomass according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, it should be noted that, in the drawings, the same components or parts are denoted by the same reference numerals whenever possible. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted so as to avoid obscuring the subject matter of the present invention.

As used herein, the terms " about, "" substantially, "" etc. ", when used to refer to a manufacturing or material tolerance inherent in the stated sense, Accurate or absolute numbers are used to help prevent unauthorized exploitation by unauthorized intruders of the referenced disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a process diagram of a method for manufacturing a heat-bondable conjugate fiber using the biomass according to the present invention.

As shown in FIG. 1, the present invention is a composite fiber comprising two kinds of resins having different physical properties including a resin using biomass, and comprises a melting step, an antioxidant addition step, a spinning step, a stretching step, .

The melting step is a step of putting the first component and the second component into separate extruders and melting them.

The first component may be any one of a polyester resin, a biodegradable polyester resin and a biomass polyester resin. The polyester resin, the biodegradable polyester resin, the biomass polyester resin Can obtain a composite fiber having superior properties than the polypropylene, such as Resilience, because the material itself has excellent properties.

As the aromatic dicarboxylic acid, terephthalic acid, isophthalic acid, phthalic acid, naphthalene dicarboxylic acid and the like can be used. As the glycol, there can be used ethylene glycol, 1,3- Propanediol, 1,4-butanediol, and the like. The polyester resin is a polyethylene terephthalate (PET), a polyethylene 2,6-dinaphthalate, a polypropylene terephthalate (PPT), a polybutylene terephthalate (PBT), a polyethylene isophthalate or a mixture thereof. Preferably, polyethylene terephthalate can be used.

Most of the biodegradable polyester resins are aliphatic polyesters in which diol compounds composed of 1,4-butanediol and ethylene glycol and at least one of succinic acid, succinic acid anhydride, succinic acid ester compound or dimethyl succinate, Lt; RTI ID = 0.0 > glutaric < / RTI > acid and / or dimethyl glutarate.

The biomass polyester-based resin is an eco-friendly material capable of effectively reducing the generation of carbon dioxide by using terephthalic acid derived from para-xylene derived from biomass raw materials and ethylene glycol derived from bioethanol as raw materials.

The second component is a biomass-based polyethylene resin, which is a polyethylene-based resin obtained by dehydrating and purifying ethanol extracted from a plant, which is a conventional petroleum-based polyethylene material, and is an eco-friendly material capable of effectively reducing the generation of carbon dioxide.

The second component, a biomass-based polyethylene resin, may be melted in accordance with thermal bonding when a nonwoven fabric or the like is produced. The melting point of the second component may be 10 to 40 ° C lower than that of the first component.

In general, the polyester resin has a melting point of about 240 to 280 캜, a biodegradable polyester resin of about 150 to 200 캜, and a biomass polyester resin of about 200 to 260 캜. The melting point of the biomass- It is preferable to appropriately adjust the melting point of the resin used for the first component and the biomass polyethylene-based resin as the second component at about 100 to 140 ° C.

The antioxidant addition step may be carried out in such a manner that the first component and the second property are added to separate extruders and then the antioxidant is added before the second component or the first component and the second component are melted or melted .

The antioxidant is added in order to prevent decomposition of the compound or deterioration of physical properties due to the decrease in thermal stability when the first component and the second component are heated and melted. The antioxidant may be a phenol antioxidant, a phosphorous ester antioxidant, A mixture of one or more antioxidants such as an ester-based antioxidant, an aromatic amine-based antioxidant, a sulfur-based antioxidant, a phosphorus-based antioxidant and a phosphite-based antioxidant.

When the antioxidant is added in an amount of less than 200 ppm, the effect of the antioxidant may be insufficient. When the antioxidant is added in an amount of more than 4000 ppm, the physical properties of the heat- Of the heat-bondable composite fiber is 200 to 4000 ppm by weight based on the weight of the heat-bondable composite fiber.

In addition, various inorganic additives such as titanium dioxide, calcium carbonate, zirconium oxide, zirconium silicate, barium carbonate, alumina, carbon black and mixtures thereof may be added to improve the functionality and physical properties of the heat- More can be added.

It is preferable that the inorganic additive is added to the first component, the second component, or the first component and the second component in an amount of 0.1 to 20% by weight of an inorganic additive.

The spinning step is a step of introducing the molten first component and the second component into a composite spinning device and spinning. The heat-bondable conjugate fiber of the present invention has a core-sheath sinusoidal shape, a core-sheath eccentric shape, a side- Or a combination thereof.

When the heat-bondable conjugate fiber of the present invention is formed into a core-sheath type, it is preferable that the first component is formed from a core and the second component, which is a biomass-based polyethylene resin with little skin irritation, is formed by sheathing.

In addition, it is preferable that the first component and the second component form a conjugate fiber at a weight ratio of 30:70 to 70:30.

The drawing step is a drawing step of a general synthetic fiber in which a radiated composite fiber is drawn.

The crimping step of applying a crimp to the thermally adhesive conjugate fiber is performed after the stretching step for the balding property and the elastic force of the thermally adhesive conjugate fiber using the biomass, And a cutting step of cutting the fibers to form short fibers. The crimp forming step and the cutting step may be carried out in a general manner.

The heat-bondable composite fiber using the biomass according to the present invention may have a fineness of 1.0 to 20 deniers depending on the intended use.

The heat-bondable composite fiber using the biomass of the present invention may have a fiber length of 3 to 150 mm, depending on the purpose of use.

As described above, the heat-bondable conjugate fiber using the biomass according to the present invention is formed into a fabric such as a fabric, a knitted fabric, and a nonwoven fabric and can be used in various industrial fields. Particularly, .

Hereinafter, embodiments of the method for producing the heat-bondable conjugate fiber using the biomass according to the present invention will be described, but the present invention is not limited thereto.

Examples 1 to 5

The first component and the second component were put in separate extruders and melted. In the melting step, antioxidants in the form of a masterbatch were mixed.

 The molten first component and second component were introduced into a conventional core-sheath type composite spinning device and then spun at a spinning speed of 1,000 m / min. The core was formed as the first component, and the sheath was formed as the second component.

The spun conjugated fibers were oriented in 3.5-fold orientation, crimped, and cut to a size of about 38 mm to prepare a core-sheath sinuous composite fiber.

Table 1 shows the composition of the resin components of the first and second components, the composition ratio, the content of the antioxidant, and the production conditions of Examples 1 to 5.

Comparative Examples 1 and 2

The composite fibers were prepared in the same manner as in Example 1 except that the crimping step and the cutting step were not performed in the comparative example, and the first component was different. The compositions and the conditions of the production of the resin components of the first and second components of Comparative Examples 1 and 2, the composition ratio, the content of the antioxidant, and the like are shown in Table 1.

◈ Evaluation of spinning processability and properties of composite fibers

○ Evaluation method

* Radial fairness evaluation: The number of times the fiber is cut and broken during spinning

- Good: Less than 1 time / day

- Defective: 1 time / day ~ 10 times / day

- Very bad: 10 times / day or more

* Tensile strength: ASTM D3822

* Evaluation of discoloration: Relative sensory evaluation by 5 experts

* Bulky property: nonwoven fabric 45mm x 123mm Non-woven fabric thickness measured within 1 minute when load of 120g per area

division Example 1 Example 2 Example 3 Example 4 Example 5 Comparative Example 1 Comparative Example 2 The first component
ingredient PET PET Biodegradable PET Biodegradable PET Biomass PET PP PLA Content (% by weight) 50 70 30 50 50 50 50 Antioxidant
(ppm) 0 0 200 200 500 0 200 The second component
ingredient Biomass PE Biomass PE Biomass PE Biomass PE Biomass PE Biomass PE Biomass PE Content (% by weight) 50 30 70 50 50 50 50 Antioxidant
(ppm) 500 500 500 500 500 0 200 Radiation fairness Good Good Good Good Good Good Good Tensile strength (g / d) 4.1 4.3 3.9 4.0 4.0 3.7 3.7 Discoloration Good Good Good Good Good Yellowish Yellowish

As shown in Table 1, it can be seen that both of Examples 1 to 5 and Comparative Examples 1 and 2 of the present invention are good in spinning processability and tensile strength is also slightly better than those of Comparative Examples.

In the case of discoloration, discoloration hardly occurred in Examples 1 to 5, but in Comparative Examples 1 and 2, a little yellow discoloration occurred.

* Manufacture of nonwoven fabric and evaluation of physical properties

Examples 1 to 5 and Comparative Examples 1 and 2 prepared above were made into a nonwoven fabric.

Examples 1 to 5 were prepared by carding using the prepared short fibers and formed into a web, followed by hot-bonding and bonding to produce an air-through nonwoven fabric, and Comparative Examples 1 and 2 were prepared as spunbond nonwoven fabrics after spinning.

The weight, strength, and bulky property of the nonwoven fabric prepared above were measured and are shown in Table 2.

division Example 1 Example 2 Example 3 Example 4 Example 5 Comparative Example 1 Comparative Example 2 Process A / T A / T A / T A / T A / T Spunbond Spunbond Weight (GSM) 20 20 20 20 20 20 20 Strength (g / cm ³ ) 4.2 4 3.8 3.7 4.0 4.3 4 Bulky cast (mm) 3.5 3.2 3.1 2.8 2.7 One 1.2

As shown in Table 2, all of the heat-bondable composite fibers using biomass according to the present invention, Examples 1 to 5, are superior to Comparative Examples 1 and 2 in strength and bulky properties.

Claims (7)

A first component which is one of a polyester resin, a biodegradable polyester resin and a biomass polyester resin and a biomass polyethylene resin having a melting point lower than that of the first component by 10 to 40 ° C are used as a second component A melting step of putting the first component and the second component in separate extruders and melting them;
An antioxidant addition step of adding an antioxidant before or during melting the second component or the first component and the second component;
A spinning step of flowing the molten first component and the second component into a composite spinning device and spinning;
A stretching step of stretching the spun conjugated fiber;
A crimp forming step of applying a crimp to the stretched conjugate fiber; And
And a cutting step of cutting the thermo-adhesive type conjugate fiber after the crimp forming step. The method according to claim 1,
In the step of adding the antioxidant, the antioxidant may be one or two of a phenolic antioxidant, a phosphorous ester antioxidant, a thioester antioxidant, an aromatic amine antioxidant, a sulfur antioxidant, a phosphorus antioxidant, Wherein the antioxidant is a mixture of the antioxidant and the antioxidant. The method according to claim 1,
Wherein the antioxidant comprises 200 to 4000 ppm of the weight of the heat-bondable conjugated fiber in the step of adding the antioxidant. The method according to claim 1,
Wherein the inorganic additive is added in an amount of 0.1 to 20 wt% to the first component, the second component, or the first component and the second component in the step of adding the antioxidant. . The method according to claim 1,
In the spinning step, composite spinning is carried out in one form selected from the group consisting of a core-sheath sintering type, a core-sheath eccentric type and a side-by-side type,
Wherein the core-sheath comprises a first component as a core and a second component as a sheath. A heat-bonding type conjugate fiber using the biomass, which is produced by the production method of any one of claims 1 to 5. A nonwoven fabric comprising a heat-bonding type conjugate fiber produced by the production method of any one of claims 1 to 5.

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