KR20070122083A - Synthetic leather containing phase change material and a seat made of the synthetic leather - Google Patents

Abstract

An artificial leather and a sheet using the artificial leather are provided to maintain the temperature of a product uniformly without a separate temperature regulator, by manufacturing the artificial leather to contain phase change materials. An artificial leather(100) comprises plural types of phase change materials(401,403,405,407). The phase change materials fill micro-capsules(120) contained within the artificial leather, independently. The phase change materials are covered by a plurality of porous bodies contained within the artificial leather, independently. The number of phase change material types is two, wherein one is a material type of which materials are phase-changed at a temperature of 17-19°C and the other is a material type of which materials are phase-changed at a temperature of 27-29°C. The phase change materials are glycerol and C18H38.

Description

Synthetic leather containing phase change material and a seat made of the synthetic leather}

1 is a cross-sectional view showing an artificial leather including a phase change material according to a first embodiment of the present invention,

2 is a cross-sectional view showing the artificial leather including a phase change material according to a second embodiment of the present invention.

3 is a perspective view showing a car seat using the artificial leather shown in Figures 1 and 2,

4 is a cross-sectional view of the automobile seat shown in FIG. 3.

Explanation of symbols on the main parts of the drawings

100, 200: artificial leather 110, 210, 311, 321: known substance

120: microcapsules 220: porous body

300: sheet 310: jacket

320: contents 330: frame

401: Glycerol 403: C18H38

405: Polyglycol 407: C20H42

The present invention relates to artificial leather and a sheet using the same, and in particular, it contains a phase change material is configured to maintain a temperature range of 18 ℃ to 28 ℃ to be less affected by the external temperature and feel comfortable.

Phase change material (PCM) refers to a material used for the purpose of storing energy or maintaining a temperature by utilizing the latent heat absorption or release effect of the material.

Here, latent heat refers to heat that absorbs or releases at the same temperature as the material changes phase, that is, when it changes from solid to liquid or liquid to solid, liquid to gas or gas to liquid, and latent heat is sensible heat, It is much greater than the amount of heat absorbed or released in the absence of a phase change.

Conventionally, devices for heating and cooling using such phase change materials have been developed.

Republic of Korea Utility Model Publication No. 1995-0009853 (the name of the design: exothermic heat insulating mat and PTC heating sheet using a phase change material and PTC sheet) refers to a sheet using a phase change material. Looking at its configuration briefly, a thermal insulation bag sealed with a phase change material is located inside the sheet to store heat of the heating element.

In the prior art, there is an effect of improving the function of the heat generating sheet by incorporating only the insulation bag sealed with the phase change material, but the thickness of the sheet becomes thicker than necessary because the insulation bag is located, and a separate insulation bag is prepared. There is a problem to be done.

The present invention has been invented to solve the problems of the prior art as described above, and an object thereof is to provide artificial leather containing a phase change material in the leather itself.

In addition, by manufacturing a car seat using such artificial leather, the car seat can be maintained in a constant temperature range. Therefore, even if the driver or the passenger seated on the seat in the winter or summer, it is configured not to feel excessive cold or hot.

In order to achieve the above object, the artificial leather according to an aspect of the present invention is characterized in that it comprises a plurality of kinds of phase change material.

In addition, the phase change material is characterized in that it is independently filled in the microcapsules inherent in artificial leather, or independently invaded in a plurality of porous bodies.

In addition, according to a preferred embodiment of the present invention, there are two kinds of phase change materials, one of which is a phase change material at 17 ° C. to 19 ° C., preferably glycerol, and the other is at 27 ° C. to 29 ° C. A phase change material, preferably C18H38.

In addition, the sheet using the artificial leather according to another aspect of the present invention, the outer skin is artificial leather, the structure is filled with the contents having a cushion inside the outer skin, the artificial leather is a microcapsule of a plurality of kinds of phase change material Plural kinds of phase change material embedded in the base independently, or plural kinds of phase change material embedded in the base independently invading the porous bodies, and the contents are the same or different from those of the phase change material in the artificial leather. It is a technical feature that the phase change material of is embedded in the base in the state to be independently filled in the microcapsules or invaded independently of the porous bodies.

In addition, according to a preferred embodiment of the present invention, there are two kinds of phase change materials inherent in the contents, one type is a material which changes phase at 7 ° C. to 19 ° C., preferably polyglycol, and the other type is 27 It is a substance which changes phase at C-37 degreeC, Preferably it is C20H42.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the artificial leather and a sheet using the same, including the phase change material according to the present invention will be described in detail.

1 is a cross-sectional view showing an artificial leather including a phase change material according to a first embodiment of the present invention, Figure 2 is a cross-sectional view showing an artificial leather including a phase change material according to a second embodiment of the present invention. . 3 is a perspective view illustrating a car seat using the artificial leather shown in FIGS. 1 and 2, and FIG. 4 is a cross-sectional view of the car seat shown in FIG. 3.

As shown in FIG. 1, the artificial leather 100 has a microcapsule 120 embedded therein, and the microcapsule 120 is filled with a phase change material.

There are two kinds of phase change materials contained in each of the microcapsules 120, glycerol (401) which changes phase at 18 ° C. (glycerol; latent heat 200 kJ / kg) and normal paraffin-based C 18 H 38 (403) which changes phase at 28 ° C. (Latent heat 243 kJ / kg). These materials are embedded in the artificial leather 100 in a state contained in each of the microcapsules 120.

Here, the microcapsules 120 are preferably made of a single material so as not to be denatured due to chemical reaction between different phase change materials.

Meanwhile, the amount of the base material 110 (PVC, PU) of the artificial leather 100 and the amount of the microcapsules 120 containing the glycerol 401 and the amount of the microcapsules 120 containing the C18H38 403 are universal. Mix in a proper mixing ratio according to the room temperature. In this case, when the amount of the microcapsules increases, the characteristics of the artificial leather deteriorate relatively easily, and when the amount of the microcapsules is relatively small, there is a disadvantage in that the temperature control ability decreases.

Therefore, in the artificial leather according to the present invention, in order to obtain the maximum temperature control ability while maintaining the characteristics of the artificial leather, it is preferable that the microcapsules are mixed in a volume ratio of about 20 to 30% with respect to the known material. Wherein the volume ratio of microcapsules containing glycerol to microcapsules containing C18H38 is 50 to 50.

Hereinafter, a method of manufacturing artificial leather containing microcapsules 120 containing glycerol 401 and microcapsules 120 containing C18H38 403 will be described.

After mixing the amount of the microcapsules 120 containing the glycerol 401 and the amount of the microcapsules 120 containing the C18H38 (403) and the amount of the matrix material 110 in an appropriate ratio, the mixed material was injected into the injection molding machine. Artificial leather is manufactured by winding up after cooling.

Meanwhile, the artificial leather 100 manufactured as described above is used as furniture for furniture such as sofas and chairs. Indoor furniture manufactured using the artificial leather of the present invention is a comfortable temperature that can be felt by a person by the phase change of glycerol (401) and C18H38 (403) in the artificial leather (100) even if the room is not cold-heated Maintain a temperature in the range of 18 ° C. to about 28 ° C.

Specifically, when the room temperature is less than 18 degrees, the glycerol 401 phase change from liquid to solid to release latent heat to maintain the artificial leather 100 higher than the room temperature, when the room temperature is 18 ℃ to 28 ℃ Glycerol (401) is in a liquid state, C18H38 (403) maintains a solid state, when the room temperature exceeds 28 ℃ C18H38 (403) phase change from a solid to a liquid absorbs the external heat as latent heat artificial leather Keep (100) below room temperature.

As described above, the indoor furniture made of artificial leather 100 including a phase change material according to an embodiment of the present invention can maintain a comfortable temperature range of 18 ° C. to 28 ° C., so that the room temperature is less than the temperature range. However, when exceeded, two kinds of phase change materials phase change and maintain the temperature of the furniture in the above temperature range.

Meanwhile, in the above embodiment, glycerol and C18H38 having a relatively latent heat are used as the phase change material. However, if the phase change material is near 8 ° C., specifically, 7 ° C. to 9 ° C., such as glycerol, it may be used instead of glycerol. In addition, it is a fact that those skilled in the art can easily use C18H38 instead of C18H38 if the material changes in phase around 18 ° C, specifically, 17 ° C to 19 ° C, such as C18H38.

In addition, the artificial leather 100 described above has been described that the phase change material is contained in the microcapsule 120, but may be configured to accommodate the phase change material using the porous body 220 as in the second embodiment. .

As shown in FIG. 2, in the state in which the phase change material in the liquid state is infiltrated into the porous body 220, the porous body 220 in which the phase change material is infiltrated is mixed with the base material 210 of the artificial leather 200. Injection molding. The porous body 220 manufactured as described above is wrapped in the base material 210, and the porous body 220 is wrapped in the base material 210 even when the phase change material infiltrated in the porous body 220 is changed into a liquid state. ) It does not flow to the outside.

Meanwhile, the artificial leathers 100 and 200 manufactured according to the first and second embodiments may be used for indoor furniture, and may be used as a component of outdoor furniture or articles exhibiting excessive temperature difference.

The following describes a car seat as a representative example of outdoor furniture or articles.

The temperature inside the car can reach -20 ° C in winter and up to 80 ° C in summer, depending on the outside temperature of the car. In this case, when the temperature change is large, the artificial leathers 100 and 200 described in the first and second embodiments cannot maintain the temperature of 18 ° C to 28 ° C.

The reason is that if the temperature is too low, the glycerol 401 and C18H38 (403) inherent in the artificial leather (100, 200) are both maintained in a solid state, and if the temperature is too high, the glycerol (401) and C18H38 (403) This is because all of them are kept in a liquid state, and the effect of cooling and heating using latent heat cannot be obtained.

Therefore, when the external temperature such as the car seat 300 can not expect the effect of cooling and heating even with the phase change material of the glycerol 401 and C18H38 (403), the contents 320 filled in the seat 300 It is preferable to include a large amount of the phase change material or preferably to absorb and release heat by adding another phase change material, so that the shell 310 of the sheet 300 can be maintained without departing from a certain temperature range.

Hereinafter, a detailed description will be given of a car seat for realizing this purpose.

In the case of the automobile seat 300, the outer shell 310 is manufactured in an ergonomic form to give the seated person comfort by cutting the artificial leather (100, 200), the inside of such a shell 310 The contents 320 having a cushion are filled to keep the outer shell 310 in a cut shape.

Meanwhile, the contents 320 include polyglycol 405 (Polyglycole; latent heat 276 kJ / kg) and normal paraffin-based C20H42 (407) (latent heat 247 kJ / kg) which change phase at 8 ° C. .

A representative example of the content 320 is a sponge, and when the sponge is manufactured, the microcapsules 120 containing the polyglycol 405 and the microcapsules 120 containing the C20H42 407 are known. After mixing with the material 321, it is prepared by a sponge manufacturing method.

The contents 320 of the automobile seat 300 manufactured as described above are wrapped around the frame 330 of the automobile seat 300, and the artificial leathers 100 and 200 of the first and second embodiments are disposed outside the contents 320. Wrapping the outer shell 310 is made of.

The vehicle seat 300 according to the present invention primarily maintains a temperature of 18 ° C. to 28 ° C. in the outer shell 310 according to the temperature inside the vehicle, and the temperature of the outer shell 310 is in the temperature range of 18 ° C. to 28 ° C. If lower or higher, the phase change material inherent in the contents 320 absorbs or releases heat due to low or high heat.

When the external temperature is lowered to 8 ° C. or less while the glycerol 401 of the shell 310 is phase-changed to a solid state, the polyglycol 405 of the content 320 is phase-changed to a solid to release latent heat. As the contents 320 emit heat, the temperature of the shell 310 is maintained at 8 ° C. higher than the outside temperature.

On the contrary, when the C18H38 403 of the outer shell 310 changes to liquid and the external temperature rises to 36 ° C. or higher, the C20H42 407 in the solid state absorbs heat while changing to liquid. As the contents 320 absorb heat, the temperature of the shell 310 is maintained at 36 ° C. lower than the external temperature.

Meanwhile, reference numeral 311, which is not described, of reference numerals shown in FIG. 4 is a known material of the outer shell 310, and is PVC and PU.

As such, the phase change temperature of the two types of phase change materials inherent in the contents is higher and lower than the phase change temperatures of the two types of phase change materials in the shell 310, so that the temperature of the shell 310 can be controlled. Temperature control is possible at temperatures above and below the range.

On the other hand, in the above embodiment, by adopting polyglycol and C20H42 as a phase change material inherent in the contents and having a relatively latent heat and a relatively large temperature difference between the heats of fusion compared to the phase change material used for the shell, it is comfortable in winter and summer. Temperature can be effectively controlled when the difference between the temperature and the actual external temperature is large.

However, even if a phase change material having the same temperature as the phase change material used for the skin or a phase change material having a small temperature difference is used, the phase change material can also be used for the contents because it can absorb external heat beyond the capacity of the skin. However, if the heat of fusion of the phase change material is less than 7 ° C, the seated person will feel cold. If the heat of fusion of the phase change material exceeds 37 ° C, the seated person will feel hot. The substance which phase-changes at ° C is preferable, and the other kind is preferably a substance that phase-changes at 27 ° C to 37 ° C.

As described in detail above, the artificial leather including the phase change material of the present invention has a phase change material so as to control the temperature inside itself, so that even if a separate temperature control device is not attached, it is less sensitive to external temperature. Temperature can be maintained.

In addition, in the automobile seat according to the present invention, in embedding two kinds of phase change materials in each of the outer shell and the contents, the phase change material of the contents changes in phase at a temperature condition outside the temperature control range of the outer shell. Adjust it. Therefore, even in a car interior condition with a large outside temperature range, it is possible to maintain a temperature at which the driver and the passenger can feel comfortable.

Although the technical idea of the artificial leather including the phase change material of the present invention and the sheet using the same has been described with the accompanying drawings, this is illustrative of the best embodiment of the present invention and is not intended to limit the present invention.

Claims (8)

Artificial leather, characterized in that it comprises a plurality of phase-change material. The method of claim 1, The phase change material is artificial leather, characterized in that filled independently of the microcapsules inherent in artificial leather. The method of claim 1, The phase change material is artificial leather, characterized in that it is independently invaded in a plurality of porous bodies inherent in artificial leather. The method according to any one of claims 1 to 3, The phase change material is two kinds, one type is a material that changes the phase at 17 ℃ ~ 19 ℃, the other type is artificial leather, characterized in that the material is phase change at 27 ℃ ~ 29 ℃. The method according to any one of claims 1 to 3, The phase change material is two kinds, one is glycerol, the other is artificial leather, characterized in that the C18H38. In the outer skin is artificial leather, the seat filled with the contents having a cushion inside the outer skin, The artificial leather is embedded in the base in a state in which a plurality of types of phase change materials are independently filled in the microcapsules, or in a state in which a plurality of types of phase change materials are independently invaded in the porous bodies, The content is characterized in that the same or different phase change material inherent in the artificial leather is embedded in the base in a state that is independently filled in the microcapsule or invaded independently of the porous body, Sheet using artificial leather containing phase change material. The method of claim 6, There are two kinds of phase change materials inherent in the contents, one type is a phase change material at 7 ° C. to 19 ° C., and the other type is a phase change material at 27 ° C. to 37 ° C. Seat using artificial leather containing materials. The method of claim 6, The phase change material inherent in the content is two kinds, one is polyglycol and the other is C20H42, characterized in that the sheet using the artificial leather containing the phase change material.

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