KR20060115543A - Method of manufacturing thermogenerating spunbond nonwoven fabric and the thermogenerationg spunbond nonwoven fabric formed therefrom - Google Patents

Abstract

A thermo-generating spun bond non-woven fabric and a manufacturing method thereof are provided to manufacture continuous fibers containing mineral powders, thereby increasing the productivity. Illite mineral powders having grain size below 6 micrometer are uniformly mixed with a base polymer so that polymer containing the mineral powder is prepared(S1). The polymer is transferred into a melting injection device and then synthetic continuous fibers containing the illite mineral powder of 0.5 to 5 weight % are spun(S2). The spun synthetic continuous fibers are cooled, drawn, modified and then stacked with a web shape on a moving conveyor belt(S3). The predetermined temperature and compression are applied to the stacked web so that the spun-bond woven cloth is manufactured(S4).

Description

Method of manufacturing thermogenerating spunbond nonwoven fabric and the thermogeneration g spunbond nonwoven fabric formed therefrom

The present invention relates to a method for producing a regenerative spunbond nonwoven fabric and a regenerative spunbond nonwoven fabric formed therefrom, and more particularly, to a method for manufacturing a regenerative spunbond nonwoven fabric using a continuous yarn in which mineral powder exhibiting a heat storage effect is formed. It relates to a heat storage spunbond nonwoven fabric.

Unlike other dry and wet nonwoven fabrics, spunbond nonwoven fabrics are composed of continuous fibers, so they have excellent tensile strength and other properties such as acupuncture, work clothes, and other daily necessities, such as crop covers. Widely used as material or other industrial materials. As such, since the spunbond nonwoven fabric is often required to be kept warm in terms of its use, incorporating a powder such as a mineral having heat storage properties into the spunbond nonwoven fabric will further improve its utility.

However, the spunbond nonwoven fabric is manufactured through a process of spinning and stretching a polymer into a synthetic fiber continuous yarn through a melt extruder, and thus, due to the high hardness or particle size of the mineral powder during spinning and stretching using a polymer mixed with mineral powder, May be damaged, and continuous production may be difficult due to the decrease in radioactivity and stretchability. In addition, due to the mixed mineral powder may cause disadvantages such as deterioration of the mechanical properties or deterioration of the touch of the produced heat storage spunbond nonwoven fabric.

Therefore, when mineral powder is mixed in order to give heat storage property to a spunbond nonwoven fabric, careful examination should be performed so as not to reduce manufacturing processability and the physical property of a spunbond nonwoven fabric.

     The technical problem to be achieved by the present invention is to solve the above problems, to provide a method for producing a thermal storage spunbond nonwoven fabric with improved productivity by producing a continuous yarn containing the mineral powder by spinning and stretching continuously without damaging the production equipment. .

Another technical problem to be achieved by the present invention is to provide a heat storage spunbond nonwoven fabric that exhibits smooth touch and good physical properties as well as exhibits growth growth and pest control effects of living organisms in addition to sufficient warming effects.

 In order to achieve the above technical problem, a method of manufacturing a regenerative spunbond nonwoven fabric of the present invention includes (S1) preparing a mineral powder-containing polymer by uniformly mixing an illite mineral powder having a particle size of 6 μm or less with a base polymer; (S2) transferring the mineral powder-containing polymer to a melt extruder, and spinning into a synthetic fiber continuous yarn containing 0.5 to 5% by weight of the illite mineral powder; (S3) cooling, stretching and opening the spun synthetic fiber continuous yarn, and laminating in a web form on a moving conveyor belt; And (S4) applying a predetermined temperature and pressure to the laminated web to produce a spunbond nonwoven fabric.

In the production method of the present invention, the temperature of the melt extruder of the step (S2) is preferably 200 ~ 320 ℃ considering the radioactivity, and the temperature and pressure of the step (S4) when considering the properties of the nonwoven fabric is 100 ~ 250, respectively It is preferable to adjust at 50 degreeC and 50-110 N / mm.

The heat storage spunbond nonwoven fabric formed according to the above-described manufacturing method is a spunbond nonwoven fabric formed of a synthetic fiber continuous yarn in which mineral powder is incorporated, and the mixed mineral powder is an illite having a particle size of 6 μm or less, and is based on the total weight of the spunbond nonwoven fabric. To 5% by weight.

Hereinafter, a method of manufacturing a regenerative spunbond nonwoven fabric according to the present invention and a regenerative spunbond nonwoven fabric formed therefrom will be described in detail.

The manufacturing method of the heat storage spunbond nonwoven fabric according to the present invention is as follows.

First, an illite mineral powder having a particle size of 6 μm or less is uniformly mixed with a base polymer to prepare a mineral powder-containing polymer (S1 step).

The illite mixed with the base polymer is a mica group mineral belonging to a monoclinic system and has a chemical composition of (K, H ₃ O) Al ₂ (Si, Al) ₄ O ₁₀ (H ₂ O, OH) ₂ . The hardness is 1 to 2 and does not damage the equipment during spinning or stretching. In addition, illite is known to exhibit heat storage properties, far-infrared ray emission, toxic gas adsorption and deodorization, animal and plant growth and pest control effects, further improving the utility of spunbond nonwoven fabrics. The particle size of the illite mineral powder is pulverized and mixed so as to be 6 µm or less. If the particle size of the mineral powder exceeds 6㎛ there is a problem that the pack pressure rises rapidly and the radioactivity is poor. The base polymer can be used as long as it can form a continuous yarn that can be used as a material of a spunbond nonwoven fabric. For example, polyethylene, polypropylene, polyester, and the like can be used alone or in combination of two or more thereof. It is not limited to this.

Subsequently, the mineral powder-containing polymer is transferred to a melt extruder and spun into a synthetic fiber continuous yarn containing 0.5 to 5% by weight of illite mineral powder through a spinneret installed at the bottom of the die pack of the melt extruder (step S2). .

The content of the illite mineral powder may be adjusted to 0.5 to 5% by weight of the total weight of the synthetic fiber continuous yarn spun through the melt extruder, and the polymer containing the illite mineral powder is used as the master batch chip or only the polymer containing the mineral powder itself is melted. Extrude and spin. In addition, in order to give the physical and chemical stability and functionality of the product during the production of the master batch chip or to the spin-extrusion melter, light stabilizers, antistatic agents, antibacterial deodorants, softening agents, etc. can be further added. If the content of the illite mineral powder is less than 0.5% by weight, the effect of the addition of the illite mineral powder is insignificant, and if the content is more than 5% by weight, the processability decreases due to the rapid pack pressure increase, making continuous production difficult, and the properties of the nonwoven fabric This may fall.

The temperature of the melt extruder during spinning is preferably controlled in the range of 200 ~ 320 ℃. If the temperature is less than 200 ℃ the viscosity is too high to be difficult to spin, if the temperature exceeds 320 ℃ the polymer is pyrolyzed to poor radioactivity and physical properties are also reduced.

Synthetic fiber continuous yarn spun through the spinneret is cooled, stretched and opened according to a conventional spunbond nonwoven fabric manufacturing method and laminated in a web form on a moving conveyor belt (step S3). The process may refer to Korean Unexamined Patent Publication Nos. 1988-4158, 2002-4705, and the like, which are incorporated herein but are not limited thereto.

Then, the spunbond nonwoven fabric is manufactured by applying a predetermined temperature and pressure to the web in consideration of the heat adhesion time according to the unit weight of the laminated web and the conveying speed of the conveyor belt (step S4). The temperature and pressure applied to the web are preferably adjusted to 100 to 250 ° C. and 50 to 110 N / mm, respectively. If the temperature and pressure for thermal bonding are below 100 ° C. and 50 N / mm, respectively, sufficient thermal bonding will not be achieved. If the temperature and pressure are above 250 ° C. and 110 N / mm, respectively, the web will not be physically exposed to excessive heat and pressure. The damage causes the spunbond nonwovens to significantly degrade their physical properties.

According to the above-described manufacturing method, it is possible to manufacture a continuous yarn containing mineral powder by spinning and stretching continuously without damaging the production equipment, thereby improving the productivity of the heat storage spunbond nonwoven fabric.

In addition, the heat storage spunbond nonwoven fabric prepared according to the above-described manufacturing method is formed of a synthetic fiber continuous yarn containing an illite mineral powder having a particle size of 6 μm or less, and the illite mineral powder is 0.5 to 5 based on the total weight of the spunbond nonwoven fabric. It is contained by weight. The heat storage spunbond nonwoven fabric of the present invention not only exhibits a smooth touch and good physical properties, but also exhibits sufficient thermal insulation, far-infrared emission, toxic gas adsorption and deodorization, promoting plant and animal growth, and controlling pests. .

Hereinafter, the present invention will be described in detail with reference to Examples. However, embodiments according to the present invention can be modified in many different forms, the scope of the present invention should not be construed as limited to the embodiments described below. Embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art.

<Example 1>

The finely ground fine powder, pulverized and refined to have a particle size of 6 μm or less, was uniformly mixed with a polypropylene base polymer to prepare a masterbatch chip containing 20 wt% of illite mineral powder. Transfer the masterbatch chip to the melt extruder and add more polypropylene chip so that the content of illite mineral powder is 1.0% by weight, and then melt spinning at 230 ℃ to cool the continuous yarn spun with cooling air, and 1,000m / After stretching and opening at a spin speed of min, it was laminated in the form of a web on a conveyor belt moving at a speed of 50 m / min. Subsequently, a polypropylene spunbond nonwoven fabric having a unit weight of 69.6 g / m 2 having a fineness of 2.5 denier was prepared by applying a thermal bonding temperature of 158 ° C. and an adhesive pressure of 90 N / mm to the laminated web.

<Example 2>

The finely ground fine powder, pulverized and refined to have a particle size of 6 μm or less, was uniformly mixed with a polypropylene base polymer to prepare a masterbatch chip containing 20 wt% of illite mineral powder. Transfer the master batch chip to the melt extruder and add more polypropylene chip and UV stabilizer so that the content of illite mineral powder and UV stabilizer are 1% by weight and 1% by weight, respectively, and then melt spun at 230 ° C. The spun continuous yarn was cooled with cooling air, stretched and opened at a spinning speed of 700 m / min, and then laminated in a web form on a conveyor belt moving at a speed of 45 m / min. Subsequently, a heat-bonding temperature of 160 ° C. and an adhesion pressure of 95 N / mm were applied to the laminated web to prepare a polypropylene spunbond nonwoven fabric having a unit weight of 79.8 g / m 2 having a fineness of 3.5 denier.

<Example 3>

It was prepared in the same manner as in Example 1 except that the content of the illite mineral powder was added to be 5% of the total weight of the continuous yarn spun.

<Example 4>

It was prepared in the same manner as in Example 2 except that the content of the illite mineral powder was added to be 2.4% of the total weight of the continuous yarn spun.

Example 5

It was manufactured in the same manner as in Example 1 except that the thermal bonding temperature was set at 168 ° C. and the bonding pressure was set at 110 N / mm.

<Example 6>

It was prepared in the same manner as in Example 4 except that the thermal bonding temperature was 170 ℃ and the adhesive pressure was 110N / mm.

<Example 7>

The finely ground fine powder ground and refined to have a particle size of 6 μm or less was uniformly mixed with a polyester base polymer to prepare a masterbatch chip containing 20 wt% of illite mineral powder. Transfer the masterbatch chip to the melt extruder and add more polyester chip so that the content of illite mineral powder is 2.4% by weight, and then melt spun at 290 ℃ to cool the continuous yarn spun with cooling air, and 4,000m Stretched and opened at a spinning speed of / min, and then laminated in web form on a conveyor belt moving at a speed of 90m / min. Subsequently, a laminated spun web was subjected to a thermal bonding temperature of 220 ° C. and an adhesive pressure of 110 N / min to prepare a polyester spunbond nonwoven fabric having a unit weight of 40.0 g / m ² having a fineness of 2.5 denier.

<Example 8>

The finely ground fine powder ground and refined to have a particle size of 6 μm or less was uniformly mixed with a polyethylene base polymer to prepare a masterbatch chip containing 20 wt% of illite mineral powder. Transfer the master batch chip to the melt extruder and add more polyethylene chips to make the content of illite mineral powder 3.5% by weight, and then melt spun at 190 ° C to cool the continuous yarn spun with cooling air Stretched and opened at spinning speed, then laminated in web form on a conveyor belt moving at a speed of 45 m / min. Then, a polyethylene spunbond nonwoven fabric having a unit weight of 80.0 g / m ² having a fineness of 2.5 denier was prepared by applying a thermal bonding temperature of 120 ° C. and an adhesive pressure of 110 N / min to the laminated web.

Comparative Example 1

It was prepared in the same manner as in Example 1 except that the illite content was added to be 0.4% of the total weight of the continuous yarn spun.

Comparative Example 2

It was prepared in the same manner as in Example 1 except that the illite content was added to be 6% of the total weight of the continuous yarn spun.

The following items were measured about the heat storage spunbond nonwoven fabric prepared according to the above Examples and Comparative Examples, and the results are shown in Table 1 below.

* Far-infrared emissivity: FT-IR Spectrometer was used to measure the black body at 40 ℃.

* Filter pressure: The pressure at the end of the extruder of the melt spinning process was measured over time.

* Regenerative property: The regenerative spunbond nonwoven fabric (sample for measurement) prepared in Examples and Comparative Examples was compared with the normal spunbond nonwoven fabric containing no elite mineral powder. The measurement method is as follows. An incubator set at 50 ° C. was placed in a 10 ° C. constant temperature chamber and covered with a sample for measurement and a comparative sample and held for 10 minutes, and then the incubator was removed. After 5 minutes, the internal temperature of each sample was measured by infrared imaging. Then, the measured temperatures were compared, and the value obtained by subtracting the temperature of the thermostat covering the sample for comparison from the temperature of the thermostat covering the sample for measurement was expressed as a representative value of heat storage property.

* Unit weight: The basis weight of the nonwoven fabric was measured using an electronic balance.

* Tensile strength: measured by the conventional method using INSTRON.

* Thickness: The thickness of the nonwoven fabric was measured using a dial gauge.

* The touch was evaluated by the expert in two steps.

○: smooth touch, △: normal touch

* Radioactivity was evaluated by the expert in two steps.

○: good, x: poor

division Additive Content (%) Unit weight (g / ㎡) Tensile Strength (Kg / 5cm) Elongation (%) Thickness (mm) Filter pressure (bar) Far infrared ray (%) Heat storage (℃) Radioactive Touch Illite UV stabilizer Example 1 1.0 0.0 69.6 17.6 86 0.50 96 88.1 1.1 ○ ○ Example 2 1.0 1.0 79.8 18.4 75 0.56 97 88.2 1.1 ○ ○ Example 3 5.0 0.0 69.9 16.5 65 0.51 105 89.3 1.7 ○ ○ Example 4 2.4 1.0 77.8 17.0 72 0.54 100 88.8 1.4 ○ ○ Example 5 1.0 0.0 69.6 17.8 80 0.48 96 87.6 0.9 ○ ○ Example 6 2.4 1.0 79.8 18.6 70 0.53 100 88.5 1.3 ○ ○ Example 7 2.4 0.0 40.0 12.8 50 0.32 105 88.3 1.2 ○ ○ Example 8 3.5 0.0 80.0 15.5 60 0.50 108 89.0 1.6 ○ ○ Comparative Example 1 0.4 0.0 69.7 17.6 84 0.50 96 87.1 0.4 ○ △ Comparative Example 2 6.0 0.0 - - - - - - - × -

Referring to Table 1, it can be seen that the heat storage spunbond nonwoven fabric (Examples 1 to 8) manufactured according to the present invention exhibits excellent physical properties and a touch feeling while having good processability. Meanwhile, it can be seen that the nonwoven fabric of Comparative Example 1 in which the content of the illite mineral powder is smaller than the content range of the present invention is poor in heat storage property and inferior in touch. In addition, the nonwoven fabric of Comparative Example 2, in which the content of the illite mineral powder is larger than the content range of the present invention, was impossible to manufacture the nonwoven fabric according to a continuous process due to poor radioactivity.

As described above, according to the manufacturing method of the heat storage spunbond nonwoven fabric of the present invention, since the contained heat storage component illite mineral powder has an appropriate hardness, hardly damages the production equipment during the manufacturing process, and fairness is good. The thermal storage spunbond nonwoven fabric can be produced continuously.

In addition, the produced heat storage spunbond nonwoven fabric not only exhibits smooth touch and good physical properties, but also exhibits effects such as sufficient heat retention according to the content of illite. Therefore, when used as an agricultural crop cover, it is possible to prevent the cooling of the crops and to promote the growth of the crops and to maintain the freshness, and can be widely used as a material for various daily necessities such as bedding, work clothes, and household goods. .

Claims (5)

(S1) preparing a mineral powder-containing polymer by uniformly mixing the illite mineral powder having a particle size of 6 μm or less with the base polymer; (S2) transferring the mineral powder-containing polymer to a melt extruder, and spinning into a synthetic fiber continuous yarn containing 0.5 to 5% by weight of the illite mineral powder; (S3) cooling, stretching and opening the spun synthetic fiber continuous yarn, and laminating in a web form on a moving conveyor belt; And (S4) A method of manufacturing a regenerative spunbond nonwoven fabric comprising applying a predetermined temperature and pressure to the laminated web to produce a spunbond nonwoven fabric. According to claim 1, wherein the temperature of the melt extruder of the step (S2) is 200 ~ 320 ℃, the temperature and pressure of the step (S4) is the heat storage, characterized in that 100 ~ 250 ℃ and 50 ~ 110N / mm, respectively Method for producing spunbond nonwovens. The method of claim 2, wherein the synthetic fiber continuous yarn is made of any one polymer selected from the group consisting of polypropylene, polyethylene, and polyester, or a polymer obtained by mixing two or more thereof. A spunbonded nonwoven fabric formed of a synthetic fiber continuous yarn mixed with mineral powder, The mineral powder is an illite having a particle size of 6㎛ or less, heat storage spunbond nonwoven fabric, characterized in that contained 0.5 to 5% by weight based on the total weight of the spunbond nonwoven fabric. 5. The heat storage spunbond nonwoven fabric according to claim 4, wherein the synthetic fiber continuous yarn is made of any one polymer selected from the group consisting of polypropylene, polyethylene, and polyester, or a polymer mixed with two or more thereof.