KR102535872B1 - Manufacturing method for functional sheet with improved thermal insulation - Google Patents

Abstract

A method of manufacturing a functional sheet with excellent thermal insulation performance according to an embodiment of the present disclosure comprises the steps of: manufacturing a first sheet; manufacturing a second sheet stacked on the upper surface of the first sheet; manufacturing a third sheet stacked on the upper surface of the second sheet; and laminating the first to third sheets.

Description

Functional sheet manufacturing method with excellent thermal insulation performance {MANUFACTURING METHOD FOR FUNCTIONAL SHEET WITH IMPROVED THERMAL INSULATION}

The present disclosure relates to a method for manufacturing a functional sheet with excellent thermal insulation performance, and more particularly, to a method for manufacturing a functional sheet with excellent thermal insulation and antibacterial performance using a bamboo extract and excellent thermal insulation performance that can be safely used on the skin.

In general, nursing bottles required for infant feeding require careful attention to container management because liquid contents such as powdered milk or baby food are repeatedly filled and emptied.

Maintaining the temperature of the contents of the baby bottle for 10 to 15 minutes, which is the average feeding time, and ingesting the contents helps the baby's digestive power by activating digestive enzymes in the body.

However, since the material of the baby bottle is not made of a material that sufficiently considers temperature maintenance, the temperature of the contents of the baby bottle rapidly changes to the same as room temperature. In addition, when the user's hand comes into contact with the surface of the baby bottle, it is contaminated with germs or viruses, or it is difficult to grip due to a temperature difference with the outside air.

Republic of Korea Patent Publication No. 10-2013-0077018 (2013.07.09)

In order to solve the above problems, the method for manufacturing a functional sheet having excellent thermal insulation performance of the present disclosure improves the thermal insulation performance of the contents of a baby bottle, improves antibacterial performance while preventing direct contact between the user's hand and the baby bottle, and prevents gripping of the baby bottle. It is an object to provide a functional sheet that can have a human-friendly touch while facilitating the

A method for manufacturing a functional sheet having excellent thermal insulation performance according to an embodiment of the present disclosure includes preparing a first sheet, preparing a second sheet laminated on an upper surface of the first sheet, and manufacturing a first sheet laminated on an upper surface of the second sheet. It includes a step of manufacturing 3 sheets and a step of laminating the first to third sheets.

The first sheet according to one embodiment of the present disclosure includes 30-40 parts by weight based on 100 parts by weight of the functional sheet, and the first sheet includes silica (SiO ₂ ) airgel.

The second sheet according to one embodiment of the present disclosure is included in 30-40 parts by weight based on 100 parts by weight of the functional sheet, and the second sheet includes a polyurethane resin.

The third sheet according to one embodiment of the present disclosure includes 20-40 parts by weight based on 100 parts by weight of the functional sheet, and includes latex and a bamboo extract.

The functional sheet according to an embodiment of the present disclosure is characterized in that it is used as at least one of a baby bottle holder, sleeve, cover, packaging material, and case.

The method for manufacturing a functional sheet with excellent thermal insulation performance according to the present disclosure has an effect of providing a functional sheet with excellent antibacterial performance against contamination by various bacteria or viruses when exposed to the outside.

The method for manufacturing a functional sheet having excellent thermal insulation performance according to the present disclosure has an effect of providing a functional sheet capable of continuously maintaining the temperature of the contents of a baby bottle for 15 minutes or more.

The method for manufacturing a functional sheet having excellent thermal insulation performance according to the present disclosure has an effect of providing a functional sheet that is biodegradable and can be recycled in an environmentally friendly manner.

The method for manufacturing a functional sheet having excellent heat preservation performance according to the present disclosure has an effect of providing a functional sheet capable of easily holding a baby bottle.

The method for manufacturing a functional sheet having excellent heat preservation performance according to the present disclosure has an effect of providing a functional sheet having a human-friendly tactile feel.

Effects of the present disclosure are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

Hereinafter, specific details for the implementation of the present disclosure will be described in detail. However, in the following description, if there is a risk of unnecessarily obscuring the gist of the present disclosure, detailed descriptions of well-known functions or configurations will be omitted.

Terms used in this specification will be briefly described, and the disclosed embodiments will be described in detail. The terms used in this specification have been selected from general terms that are currently widely used as much as possible while considering the functions in the present disclosure, but they may vary according to the intention of a person skilled in the related field, a precedent, or the emergence of new technology. In addition, in a specific case, there is also a term arbitrarily selected by the applicant, and in this case, the meaning will be described in detail in the description of the invention. Therefore, terms used in the present disclosure should be defined based on the meaning of the term and the general content of the present disclosure, not simply the name of the term.

Expressions in the singular number in this specification include plural expressions unless the context clearly dictates that they are singular. Also, plural expressions include singular expressions unless the context clearly specifies that they are plural.

Throughout the present specification, when a certain component is said to "include", it means that it may further include other components without excluding other components unless otherwise stated.

The terms "about," "substantially," and the like used throughout this specification are intended to encompass tolerances when such tolerances exist.

Throughout this specification, the term "combination(s) of these" included in the expression of the Markush form means a mixture or combination of one or more selected from the group consisting of the constituent elements described in the expression of the Markush form.

Throughout this specification, reference to "A and/or B" means "A, or B, or A and B".

Throughout the present specification, the description of "lamination" means a process of attaching at least one sheet or paper.

Throughout this specification, when a member is said to be located “on” another member, this includes not only a case where a member is in contact with another member, but also a case where another member exists between the two members.

Hereinafter, embodiments of the present disclosure will be described in detail so that those skilled in the art can easily practice them. However, the present disclosure may be implemented in many different forms and is not limited to the embodiments described herein.

A method for manufacturing a functional sheet having excellent thermal insulation performance according to an embodiment of the present disclosure includes preparing a first sheet, preparing a second sheet laminated on an upper surface of the first sheet, and manufacturing a first sheet laminated on an upper surface of the second sheet. It includes a step of manufacturing 3 sheets and a step of laminating the first to third sheets.

A method for manufacturing a functional sheet having excellent heat preservation performance according to an embodiment of the present disclosure includes manufacturing a first sheet.

The first sheet according to the present disclosure includes 30-40 parts by weight based on 100 parts by weight of the functional sheet, and the first sheet includes silica (SiO ₂ ) airgel. Preferably, the first sheet includes 100 parts by weight of silica airgel based on 100 parts by weight of the first sheet.

Silica airgel according to the present disclosure is formed by entangling silicon dioxide (SiO ₂ ) sparsely like a nonwoven fabric, and has an outwardly open nanoporous structure, whereby air molecules occupy more than 90% of the total volume. Due to these structural features, it has properties of high specific surface area and high permeability, ultra-light weight, ultra-insulation, ultra-low dielectric, non-combustibility, excellent thermal insulation and heat resistance, and has the lowest density among solid materials. In particular, since it has high heat insulating properties, the first sheet provides an effect that can act as a heat insulating layer.

The first sheet according to an embodiment of the present disclosure has a density of 0.05 to 0.2 g, a porosity of 90 to 98%, a specific surface area of 400 to 1800 m 2 / g, a pore volume of 2 to 10 cm 3 / g, and a particle size of 10 to 2000 μm. It is prepared by adding 5-10 parts by weight of ethanol as a solvent to silica airgel powder, which is a nano-porous material, and electrospinning to a constant thickness of about 0.5-1 mm.

Electrospinning is a method of realizing continuous-phase nanofibers with diameters in the ㎛ (micrometer) to NM (nanometer) scale using an electric field. ), template synthesis, etc., it is simpler and there is no limitation in material selection, and it is easy to control porosity and structure/size. In particular, electrospinning provides an effect of preventing aggregation of nanoparticles and maintaining a homogeneous dispersion state.

An electrospinning apparatus according to the present disclosure includes a high voltage generator, a solution supply unit, a solution supply pump, a spinneret for discharging a polymer solution, and a collector for receiving nanofibers.

By inputting the solution pump speed into the solution supply device, a certain amount of polymer solution is sent, and when a voltage is applied from the high voltage device, a voltage is applied to the solution at the end of the spinneret, and nano-sized fibers are spun into a collector (eg, polypropylene).

The nanofibers spun into the collector are completed into sheets through a drying process in a vacuum state.

The diameter and shape of uniform nanofibers are affected by solution pump speed, spinneret diameter, voltage, spinning distance, polymer molecular weight, concentration of polymer solution, and type of solvent.

The step of preparing the first sheet according to an embodiment of the present disclosure is a solution pump speed of 0.2 to 0.6 ml / hr, a needle gauge of 18 to 23 gauge (inner diameter of 0.15 to 0.23 mm), a voltage of 18 to 27 kV, and a radiation distance of 10 to 13 cm. including electrospinning under conditions.

A solution containing silica airgel powder and an ethanol solvent is put into a solution supply device of an electrospinning device, electrospun onto a polypropylene nonwoven fabric, and dried at 50° C. for 24 hours using a vacuum dryer to prepare a first sheet.

A method for manufacturing a functional sheet having excellent thermal insulation performance according to an embodiment of the present disclosure includes manufacturing a second sheet laminated on an upper surface of a first sheet.

The second sheet according to the present disclosure is included in 30-40 parts by weight based on 100 parts by weight of the functional sheet, and the second sheet includes a polyurethane resin. Preferably, the second sheet includes 100 parts by weight of polyurethane resin based on 100 parts by weight of the second sheet.

Polyurethane (PU) according to the present disclosure is also referred to as an elastic fiber, and is a polymer material having high elasticity and excellent elasticity recovery, and provides a pleasant touch and breathability due to good durability and good dryness. In particular, since it has high elasticity, the second sheet provides an effect that can act as an elastic layer.

The second sheet according to an embodiment of the present disclosure is obtained by melting a solid polyurethane resin into a solution at a temperature range of 190° C. ± 10° C. for 30 minutes, and electrospinning the polyurethane resin solution to a constant thickness of about 0.5-1 mm. are manufactured

The step of preparing the second sheet according to an embodiment of the present disclosure is a solution pump speed of 0.2 to 0.6 ml / hr, a needle gauge of 18 to 23 gauge (inner diameter of 0.15 to 0.23 mm), a voltage of 18 to 27 kV, and a radiation distance of 10 to 13 cm. including electrospinning under conditions.

The polyurethane resin solution was put into the solution supply unit of the electrospinning device, electrospun onto a polypropylene nonwoven fabric, and dried at 50° C. for 24 hours using a vacuum dryer to prepare a second sheet.

A method of manufacturing a functional sheet having excellent heat preservation performance according to an embodiment of the present disclosure includes manufacturing a third sheet laminated on an upper surface of a second sheet.

The third sheet according to the present disclosure includes 20-40 parts by weight based on 100 parts by weight of the functional sheet, and the third sheet includes latex and a bamboo extract. Preferably, the third sheet includes 60-70 parts by weight of latex and 30-40 parts by weight of bamboo extract based on 100 parts by weight of the third sheet.

Latex according to the present disclosure is a material in which fine polymer particles having a diameter of 0.05 to 1.0 μm are dispersed in an aqueous solution.

Latex is classified into natural latex and synthetic latex, and natural latex is produced from natural rubber by purifying a liquid containing proteins, alkaloids, rubber, starch, and sugars leaked from damaged tissue of various plants.

Natural latex is mainly used for products that come in contact with the body, such as rubber gloves and baby bottles. In particular, latex is used for artificial skin or artificial muscle because it provides a touch similar to that of human skin.

The bamboo extract according to the present disclosure contains cellulose, and cellulose provides a warming effect through a cyclic molecular structure that retains heat, and has higher moisture absorption than cotton, so that it does not slip when in contact with the hand and provides a soft touch.

The bamboo extract according to the present disclosure not only has an antibacterial effect because it contains polyphenols, but also has bactericidal and insecticidal properties because it contains terpenes.

The step of preparing a bamboo extract according to an embodiment of the present disclosure is to lyophilize bamboo, pulverize it into powder, add 5-10 parts by weight of cypress leaf oil as a solvent, and apply 20-30 KHz ultrasonic wave 6 times for 2 hours It includes repeated extractions.

Cypress leaf oil according to the present disclosure is an oil extracted by pressing cypress leaves, and the elemol component contained in the cypress leaf oil is immune globulin in the blood that causes skin immune diseases caused by ultraviolet rays such as rash, itching, and allergies. It provides the effect of lowering E (IgE) concentration.

Ultrasonic extraction according to the present disclosure generates very large energy by cavitation by ultrasonic vibration. In addition, due to the local temperature, sufficient energy is obtained to increase the kinetic energy of reactant particles located in the surroundings, and the impact effect of ultrasonic energy induces high pressure to increase the mixing and extraction effect (Chung et al., 2000).

Using the ultrasonic extraction process, extraction time reduction, extraction yield improvement, and safe elution of useful components are possible. Cell tissue is destroyed by the high pressure caused by the cavitation generated by ultrasonic energy, which shortens the movement distance of fat and facilitates diffusion due to the agitation effect caused by the creation and disappearance of cavities, compared to conventional extraction methods. High extraction yield can be obtained in a short time.

Extraction using ultrasonic waves according to the present disclosure is performed by adding 5-10 parts by weight of cypress leaf oil as a solvent to the powder using an ultrasonic homogenizer (KUS-650, KBT, Seongnam, Korea), and generating 20-30 KHz ultrasonic waves to At a temperature of ° C., extraction was repeated for a total of 6 times by repeating the 10-minute extraction and 10-minute resting process for a total of 2 hours.

Ultrasonic extraction according to the present disclosure is a system capable of human body stability and selective extraction, uniformly and efficiently extracts the active ingredients of the composition, and provides nutritionally stable, long-term preservation effects.

The third sheet according to an embodiment of the present disclosure is manufactured to have a constant thickness of about 0.5-1 mm by electrospinning a mixture of latex and bamboo extract.

The step of preparing the third sheet according to an embodiment of the present disclosure includes a solution pump speed of 0.2 to 0.6 ml/hr, a needle gauge of 18 to 23 gauge (inner diameter of 0.15 to 0.23 mm), a voltage of 18 to 27 kV, and a radiation distance of 10 to 13 cm. including electrospinning under conditions.

A solution containing latex and bamboo extract was put into a solution supply device of an electrospinning device, electrospun onto a polypropylene nonwoven fabric, and dried at 50° C. for 24 hours using a vacuum dryer to prepare a third sheet.

A method for manufacturing a functional sheet having excellent heat retention performance according to an embodiment of the present disclosure includes laminating first to third sheets.

In the step of laminating the first to third sheets according to the present disclosure, the lower surface of the second sheet is positioned correspondingly to the upper surface of the first sheet, and the lower surface of the third sheet is positioned correspondingly to the upper surface of the second sheet, The stacked first to third sheets are compressed and laminated at 150 ° C to 250 ° C for 5 to 7 seconds at a pressure of 5TON in a compressor to prepare a functional sheet with a constant thickness of 1.5-2.0 mm.

The functional sheet according to an embodiment of the present disclosure is characterized in that it is used as at least one of a baby bottle holder, sleeve, cover, packaging material, and case.

Products embodying a functional sheet with excellent thermal insulation performance according to an embodiment of the present disclosure include holders, sleeves, covers, packaging materials, cases, and the like, and specifically include, but are not limited to, thermal insulation covers for baby bottles and thermal insulation sleeves. it is not going to be

More specifically, it will be described in more detail below through examples of the present invention. However, these examples are for illustrating the present invention, and the present invention is not limited by these examples.

Example 1

In order to prepare a functional sheet having excellent thermal insulation performance according to the present disclosure, ethanol 7 is added to 100 parts by weight of silica airgel powder having a density of 0.1 g, a porosity of 95%, a specific surface area of 1000 m 2 / g, a pore volume of 5 cm 3 / g, and a particle size of 500 μm. By adding parts by weight as a solvent, the solution containing silica airgel powder and ethanol solvent was put into the solution supply device of the electrospinning device, solution pump speed 0.5ml/hr, needle gauge 20gauge (inner diameter 0.20mm), voltage 25kV, spinning distance A first sheet having a constant thickness of 0.7 mm was electrospun with an electrospinning machine (NCC-ESP200R2, NanoNC Co., Korea) on a polypropylene nonwoven fabric under a 12 cm condition, based on 100 parts by weight of the functional sheet, and 35 parts by weight was prepared.

100 parts by weight of the solid polyurethane resin was melted into a solution at a temperature of 190 ° C. for 30 minutes, the polyurethane resin solution was put into the solution supply device of the electrospinning device, the solution pump speed was 0.5 ml / hr, and the needle gauge was 20 gauge (inner diameter 0.20 mm). , Electrospun with an electrospinning machine (NCC-ESP200R2, NanoNC Co., Korea) on a polypropylene nonwoven fabric under the conditions of a voltage of 25 kV and a spinning distance of 12 cm to form a second sheet with a constant thickness of 0.5 mm based on 100 parts by weight of the functional sheet, 30 Prepared by weight, 30 parts by weight of bamboo was lyophilized and pulverized into powder, and 7 parts by weight of cypress leaf oil was added as a solvent to the powder using an ultrasonic homogenizer (KUS-650, KBT, Seongnam, Korea), and 25 KHz ultrasonic was generated to prepare a bamboo extract by repeating a total of 6 times with 10 minutes of extraction and 10 minutes of rest for 2 hours at a temperature of 60 ° C.

A solution containing 65 parts by weight of latex and 35 parts by weight of bamboo extract was put into the solution supply device of the electrospinning device, under the conditions of a solution pump speed of 0.5 ml/hr, a needle gauge of 20 gauge (inner diameter of 0.20 mm), a voltage of 25 kV, and a spinning distance of 12 cm. Electrospun on a polypropylene nonwoven fabric with an electrospinner (NCC-ESP200R2, NanoNC Co., Korea) to prepare a third sheet with a constant thickness of 0.7 mm based on 100 parts by weight of the functional sheet, 35 parts by weight.

The lower surface of the second sheet is positioned correspondingly to the upper surface of the manufactured first sheet, the lower surface of the third sheet is positioned correspondingly to the upper surface of the second sheet, and the stacked first to third sheets are placed in a compressor at 5TON. It was compressed and laminated to a constant thickness of 1.5 mm for 7 seconds at 200 ° C under pressure to complete and commercialize a functional sheet with excellent thermal insulation performance.

Comparative Example 1

A commercially available baby bottle sleeve was used.

Comparative Example 2

In Example 1, a first sheet was prepared with a solution containing 100 parts by weight of silica airgel, a second sheet was prepared with a solution containing 100 parts by weight of a polyurethane resin, and 65 parts by weight of latex and 35 parts by weight of a bamboo extract were prepared. A solution containing 100 parts by weight of silica airgel is used to prepare a first sheet without preparing a third sheet, instead of preparing a functional sheet by preparing a solution to be a third sheet and laminating the first to third sheets, A solution containing 100 parts by weight of polyurethane resin was prepared in the same manner as in Example 1, except that a functional sheet was prepared by preparing a second sheet and laminating the first and second sheets.

Comparative Example 3

In Example 1, a first sheet was prepared with a solution containing 100 parts by weight of silica airgel, a second sheet was prepared with a solution containing 100 parts by weight of a polyurethane resin, and 65 parts by weight of latex and 35 parts by weight of a bamboo extract were prepared. Instead of preparing a solution to form a third sheet and laminating the first to third sheets to produce a functional sheet, a solution containing 100 parts by weight of silica airgel is prepared into a first sheet, and a polyurethane resin containing 100 parts by weight Except for preparing a functional sheet by preparing a solution as a second sheet, preparing a solution containing only 100 parts by weight of latex without using a bamboo extract as a third sheet, and laminating the first to third sheets. It was prepared in the same way as in Example 1.

Comparative Example 4

In Example 1, a first sheet was prepared with a solution containing 100 parts by weight of silica airgel, a second sheet was prepared with a solution containing 100 parts by weight of a polyurethane resin, and 65 parts by weight of latex and 35 parts by weight of a bamboo extract were prepared. Instead of preparing a solution to form a third sheet and laminating the first to third sheets to produce a functional sheet, a solution containing 100 parts by weight of silica airgel is prepared into a first sheet, and a polyurethane resin containing 100 parts by weight Example, except that a functional sheet is prepared by preparing a second sheet from the solution, preparing a solution containing 65 parts by weight of latex and 10 parts by weight of bamboo extract as a third sheet, and laminating the first to third sheets. It was prepared in the same way as in 1.

Comparative Example 5

In Example 1, a first sheet was prepared with a solution containing 100 parts by weight of silica airgel, a second sheet was prepared with a solution containing 100 parts by weight of a polyurethane resin, and 65 parts by weight of latex and 35 parts by weight of a bamboo extract were prepared. Instead of preparing a solution to form a third sheet and laminating the first to third sheets to produce a functional sheet, a solution containing 100 parts by weight of silica airgel is prepared into a first sheet, and a polyurethane resin containing 100 parts by weight Example except that a functional sheet is prepared by preparing a second sheet, preparing a solution containing 65 parts by weight of latex and 60 parts by weight of bamboo extract as a third sheet, and laminating the first to third sheets. It was prepared in the same way as in 1.

<Experimental Example 1: Thermal insulation test>

For Example 1 and Comparative Examples 1 to 5, the thermal insulation rates of the functional sheets having excellent thermal insulation performance were measured.

The heat preservation rate is "heat preservation rate (%) = (1-A/B) × 100", where A is the unit surface dissipated from the heat plate for 1 hour when a sheet is installed on a heat plate set at a temperature of 34 ± 0.2 ° C. Represents the appropriate amount of heat, and B indicates the amount of heat per unit surface area dissipated from the hot plate for 1 hour when the heat plate including the heat insulating sheet is not installed on the hot plate set at a temperature of 34 ± 0.2 ° C. The results are shown in [Table 1] below.

Insulation rate result Insulation rate (KS K 0560:2019), % Example 1 85.2 Comparative Example 1 50.0 Comparative Example 2 65.4 Comparative Example 3 69.2 Comparative Example 4 72.5 Comparative Example 5 75.1

From the results in [Table 1], it can be seen that the functional sheet of Example 1 having excellent thermal insulation performance provides a higher thermal insulation effect than the products of Comparative Examples 1 to 5.

More specifically, in the case of Example 1, by preparing a solution containing 65 parts by weight of latex and 35 parts by weight of bamboo extract as a third sheet, it was confirmed that the heat preservation performance was improved compared to Comparative Examples 1 and 5. It was confirmed that the bamboo extract included in the third sheet contains cellulose and is effective in maintaining temperature because the heat retention performance is further increased through a heat-retaining ring-shaped molecular structure.

<Experimental Example 2: Antibacterial performance test>

For Example 1 and Comparative Examples 1 to 5, the antibacterial performance effect was measured for the functional sheets having excellent warming performance.

In the experiment, Staphylococcus aureus ATCC 6538 and Klebsiella pneumonia ATCC 4352 were used as strains, Staphylococcus aureus ATCC 6538 and Klebsiella pneumonia ATCC 4352 were used as strains, and TWEEN 80 as a non-ionic surfactant was added to the inoculated bacterial solution at a concentration of 0.05% and administered after 18 hours. was measured. The results are shown in [Table 2] below.

Strain concentration measurement result Initial concentration (CFU/mL) Concentration after 18 hours (CFU/mL) Example 1 staphylococcus 3.3 x 10 ⁴ 1.2 x 10 pneumococci 3.3 x 10 ⁴ 2.1x10 Comparative Example 1 staphylococcus 3.3 x 10 ⁴ 4.8 x 10 ³ pneumococci 3.3 x 10 ⁴ 3.4 x 10 ³ Comparative Example 2 staphylococcus 3.3 x 10 ⁴ 7.6 x 10 ² pneumococci 3.3 x 10 ⁴ 6.5 x 10 ² Comparative Example 3 staphylococcus 3.3 x 10 ⁴ 5.2 x 10 ² pneumococci 3.3 x 10 ⁴ 4.7 x 10 ² Comparative Example 4 staphylococcus 3.3 x 10 ⁴ 2.8 x 10 ² pneumococci 3.3 x 10 ⁴ 2.6 x 10 ² Comparative Example 5 staphylococcus 3.3 x 10 ⁴ 1.4 x 10 ² pneumococci 3.3 x 10 ⁴ 2.5 x 10 ²

From the results of [Table 2], it can be seen that the functional sheet of Example 1 having excellent thermal insulation performance provides higher antibacterial performance than the products of Comparative Examples 1 to 5.

More specifically, in the case of Example 1, it was confirmed that antibacterial performance was improved compared to Comparative Examples 1 and 5 by preparing a solution containing 65 parts by weight of latex and 35 parts by weight of bamboo extract as a third sheet. It was confirmed that the bamboo extract included in the third sheet was effective in improving the antibacterial performance because it contained polyphenols to provide an antibacterial effect, and contained terpenes to have bactericidal and insecticidal properties.

<Experimental Example 3: sensory test>

For Example 1 and Comparative Examples 1 to 5, sensory tests were conducted on the tactile sensation, absorbency, dryness, elasticity, and preference items for the functional sheets with excellent heat retention performance. The sensory test was performed by 30 sensory test agents (15 males, 15 females) on a 5-point scale (5 points: very good, 4 points: good, 3 points: normal, 2 points: bad, 1 point: very bad). ) was measured. The results are shown in [Table 3] below.

sensory test results touch absorbent dryness Flexibility preference Example 1 4.9 4.9 4.8 4.8 4.9 Comparative Example 1 2.5 2.5 2.5 2.5 2.5 Comparative Example 2 3.0 3.2 3.1 3.4 3.3 Comparative Example 3 3.5 3.6 3.5 3.6 3.5 Comparative Example 4 3.9 3.8 3.7 3.8 3.8 Comparative Example 5 4.1 4.0 4.1 4.0 4.1

From the results in [Table 3], it can be seen that the functional sheet of Example 1 having excellent warming performance provided a higher score in the sensory test than the products of Comparative Examples 1 to 5.

More specifically, in the case of Example 1, it was confirmed that a solution containing 65 parts by weight of latex and 35 parts by weight of bamboo extract was prepared as a third sheet, thereby providing a higher preference than Comparative Examples 1 and 5. The bamboo extract included in the third sheet contains cellulose, which improves the soft feel of the functional sheet, and has higher moisture absorption than cotton, so it does not slip when in contact with the hand and facilitates grip, so a human-friendly touch is applied. It was confirmed that it was effective in increasing familiarity when used as a holder or sleeve for a baby bottle.

The method for manufacturing a functional sheet with excellent thermal insulation performance according to an embodiment of the present disclosure has improved thermal insulation performance compared to a conventional method for manufacturing a functional sheet with excellent thermal insulation performance, prevents deterioration of contents, and improves antibacterial performance, thereby preventing bacteria or viruses. It is possible to provide a functional sheet that can effectively respond to contamination through, has improved soft touch without slipping, and can be gripped with a human-friendly touch when used as a holder or sleeve for a baby bottle, and has excellent warming performance.

The previous description of the present disclosure is provided to enable any person skilled in the art to make or use the present disclosure. Various modifications of the present disclosure will be readily apparent to those skilled in the art, and the general principles defined herein may be applied in various modifications without departing from the spirit or scope of the present disclosure. Thus, the present disclosure is not intended to be limited to the examples set forth herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Although the present disclosure has been described in relation to some embodiments in this specification, it should be noted that various modifications and changes may be made without departing from the scope of the present disclosure that can be understood by those skilled in the art to which the present disclosure pertains. something to do. Moreover, such modifications and variations are intended to fall within the scope of the claims appended hereto.

Claims (5)

A method for manufacturing a functional sheet having excellent thermal insulation performance,
preparing a first sheet by electrospinning a solution containing 7 parts by weight of ethanol in 100 parts by weight of silica airgel under the conditions of a solution pump speed of 0.5 ml/hr, a needle gauge of 20 gauge, a voltage of 25 kV, and a spinning distance of 12 cm;
The second sheet laminated on the upper surface of the first sheet is prepared by electrospinning a melt solution in which 100 parts by weight of the solid polyurethane resin is melted under the conditions of a solution pump speed of 0.5 ml / hr, a needle gauge of 20 gauge, a voltage of 25 kV, and a spinning distance of 12 cm. doing;
A solution containing 65 parts by weight of latex and 35 parts by weight of bamboo extract based on 100 parts by weight of the solution was applied to the third sheet laminated on the upper surface of the second sheet at a solution pump speed of 0.5 ml/hr, a needle gauge of 20 gauge, a voltage of 25 kV, and a Preparing by electrospinning under conditions of a slope of 12 cm; and
Compressing and laminating the first sheet to the third sheet to a thickness of 1.5 mm for 7 seconds at 200 ° C. at a pressure of 5 TON in a compressor.
Including, functional sheet manufacturing method.
According to claim 1,
Wherein the first sheet comprises 30-40 parts by weight based on 100 parts by weight of the functional sheet, functional sheet manufacturing method.
According to claim 1,
Wherein the second sheet comprises 30-40 parts by weight based on 100 parts by weight of the functional sheet, functional sheet manufacturing method.
According to claim 1,
The third sheet comprises 20-40 parts by weight based on 100 parts by weight of the functional sheet, functional sheet manufacturing method.
According to claim 1,
Characterized in that the functional sheet is used as at least one of a holder, a sleeve, a cover, a packaging material, and a case of a baby bottle, a functional sheet manufacturing method.