KR101735770B1 - Thermal insulating sheet having improved printing clarity and durability and the manufacturing method thereof - Google Patents

Abstract

A heat insulating sheet according to the present invention comprises: a first film layer having a print layer formed on one side of a light transmitting film; A second film layer formed on the first film layer and having a light transmission blocking layer formed on one side of the light transmission film; An adhesive film layer formed in contact with the second film layer and adhering the foamed foam; And a foamed insulation layer formed in contact with the adhesive film layer and including a foam foam for imparting heat insulation, and has an advantage of excellent print sharpness and durability.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an insulating sheet having improved print sharpness and durability, and a method of manufacturing the same. BACKGROUND OF THE INVENTION [0002]

The present invention relates to a heat-insulating sheet having improved print sharpness and durability and a method of manufacturing the same, and more particularly, to a heat-insulating sheet which improves durability and improves the defective dichroism in which print sharpness is lowered by a heat insulating layer and a method for manufacturing the same.

Various types of insulation materials are used for insulation inside the building. Recently, the use of insulation sheets such as insulation wall paper, which can be easily installed in a room, has been increasing.

A heat insulating sheet such as a heat insulating wallpaper used as an interior material of a building is printed with various patterns so as to form an exterior pattern of a sheet inside a light transmissive film such as polypropylene. A pearl component or the like may be further printed.

On the other hand, in order to provide a further adiabatic effect to the transparent film on which the printing layer is formed, a foam sheet manufactured by foaming various heat insulating materials is adhered. In order to bond the transparent film and the foam sheet together, Film layer.

Such a pressure-sensitive adhesive film layer is composed of a light-transmitting polymer such as polypropylene or the like and a foamed layer of a material having heat insulation property. For example, a pressure sensitive adhesive film layer can be formed using a polyethylene polymer.

However, conventionally, a further step of forming a printing layer on a transparent film having light transmittance and forming an adhesive film layer on the printing layer using a polyethylene resin or the like through a T-die method is required, There is a problem that the production time of the heat insulating sheet is increased because the time is long and the working process is troublesome.

Further, due to the light transmittance of polyethylene, which is mainly used as a component of the pressure-sensitive adhesive sheet formed between the print layer and the foam layer, the color of the foam foam which is usually colored is seen from the outside of the heat insulating sheet to be mixed with the print pattern, There was also a problem of unfavorable color.

Further, the heat-insulating sheet produced through the method of forming the light-transmitting layer as one layer and forming the adhesive film layer on the print layer by the Ti-die method as in the prior art has a problem that the durability thereof is lowered.

Accordingly, there is a desperate need to develop a new heat-insulating sheet and a method for manufacturing the same which can simplify the production process, prevent unfavorable color defects, and improve durability.

An object of the present invention is to provide a novel thermal insulation sheet and a method of manufacturing the same which can simplify the production process, prevent unfavorable unidirectional defects, and improve durability.

The heat insulating sheet according to an embodiment of the present invention includes a first film layer 100 on which a printing layer 120 is formed on one side of a light transmissive film 110; A second film layer 200 formed in contact with the first film layer 100 and having a light transmission blocking layer 220 formed on one surface of the light transmissive film 210; An adhesive film layer 300 formed in contact with the second film layer 200 to adhere the foam foam 410; And a foamed insulation layer 400 formed in contact with the adhesive film layer 300 and including a foam foam 410 that imparts heat insulation, and has improved print sharpness and durability.

The light transmissive films 110 and 210 of the first film layer 100 or the second film layer 200 may be formed of an oriented polypropylene (OPP) or a lead- And may be made of cast polypropylene (CPP).

In the heat insulating sheet according to another embodiment of the present invention, the adhesive film layer 300 may be made of polyethylene.

In the heat insulating sheet according to another embodiment of the present invention, the light transmission blocking layer 220 may include a pigment having a milky white color.

According to an embodiment of the present invention, there is provided a method of manufacturing a heat insulating sheet, comprising: forming a print layer on one side of a light transmitting film to produce a first film; Forming a light transmission blocking layer on one surface of the light transmissive film to produce a second film; Wherein a pressure-sensitive adhesive film capable of adhering the foamed foam to the second film is placed in contact with the light-transmitting and shielding layer of the second film so that the printed layer of the first film and the light- Positioning the foamed foam sheet so as to be in contact with the adhesive film; And a laminating step of thermally pressing the first film, the second film, the adhesive film, and the foamed foam sheet so that they adhere to each other.

In the method of manufacturing a heat insulating sheet according to another embodiment of the present invention, the step of positioning the adhesive film so as to be in contact with the light transmission blocking layer of the second film may be performed while biaxially stretching the adhesive film.

The heat insulating sheet according to the present invention is very economical because the production process is very simple, and the production cost can be remarkably lowered. In particular, the heat insulating sheet has an advantage that it can drastically prevent the secondary defect phenomenon which has been a problem in the conventional heat insulating sheet. In addition, the heat insulating sheet according to the present invention also has an advantage that the durability is drastically improved by forming the light transmitting film layer in double.

FIG. 1 is a cross-sectional view of a heat insulating sheet according to an embodiment of the present invention. FIG.
2 is a cross-sectional view showing a cross-sectional layer structure of a heat insulating sheet according to an embodiment of the present invention.
3 is a schematic view showing a process for manufacturing a heat insulating sheet according to an embodiment of the present invention.

Before describing the invention in more detail, it is to be understood that the words or words used in the specification and claims are not to be construed in a conventional or dictionary sense, It should be interpreted as meaning and concept consistent with the technical idea of the present invention. Therefore, the constitution of the embodiments described in the present specification is merely a preferred example of the present invention, and does not represent all the technical ideas of the present invention, so that various equivalents and variations And the like.

The present invention relates to a heat-insulating sheet having improved print sharpness and durability and a method of manufacturing the same, and more particularly, to a heat-insulating sheet which improves durability and improves the defective dichroism in which print sharpness is lowered by a heat insulating layer and a method for manufacturing the same.

1 to 3, a heat insulating sheet according to the present invention and a method for producing the same will be described in detail.

The heat insulating sheet of the present invention can be used variously as a heat insulating wallpaper or a heat insulating sheet, and the scope of the right of the present invention is not limited to the use of the heat insulating sheet.

1 and 2, a heat insulating sheet according to an embodiment of the present invention basically comprises a first film layer (hereinafter, referred to as " first film layer " 100, the second film layer 200, the adhesive film layer 300, and the foamed insulation layer 400.

The first film layer 100 forms the outermost layer of the heat insulating sheet and is formed on the both sides of the light transmitting film 110 and the light transmitting film 110 manufactured using various polymer resins having light transmittance, And a printing layer on which various patterns are printed on the side not exposed to the outside.

The printed layer formed on the inside of the first film layer 100 can be formed to have various patterns according to the taste of the consumer. In particular, in order to impart gloss and additional design to the appearance of the heat insulating sheet, May be formed.

Meanwhile, the second film layer 200 is provided in contact with the first film layer 100, and the light transmissive film 210, which is manufactured using various polymer resins having light transmittance, And a light transmitting /

The light transmissive film 210 of the second film layer 200 is positioned between the print layer 120 of the first film layer 100 and the light transmissive intercepting layer 220, And can be reflected and transmitted by the barrier layer 220, so that various patterns of the print layer 120 can be clearly and externally exposed.

The light transmitting and shielding layer 220 serves to allow external light to be reflected through the light transmitting film 210 as described above and to prevent the foaming foam 410 Is prevented from being reflected to the outside, thereby preventing the uniqueness of the print layer 120 from being blurred due to the inherent color of the foam foam 410, .

The first and second film layers 100 and 200 may be formed of a light transmissible film using a light transmitting polymer material capable of partially or wholly transmitting light. For example, polypropylene (PP) ) Can be used.

Polypropylene is divided into an oriented polypropylene and a casting polypropylene depending on elongation.

The stretched polypropylene is produced by a method of stretching the polypropylene film in longitudinal and transverse directions (tubular or tenter frame process) and is also called OPP.

The stretched polypropylene film has about twice the water vapor barrier property as the unleaded polypropylene film, and has excellent advantages such as transparency, low temperature impact strength and stiffness compared to the unleaded film.

On the other hand, the unleaded polypropylene is processed into a film having a certain length by feeding a polypropylene resin into a hopper in a molten state and discharging the extruded product through a T-die provided at the outlet of the extruder and the extruder, The film thus formed is not subjected to a process of further elongating (stretching), and is also referred to as CPP.

CPP is manufactured by T-die method, uniform in thickness, excellent in transparency and gloss, and excellent in printing suitability.

The light transmissive films 110 and 210 constituting the first film layer 100 or the second film layer 200 may be formed using stretched polypropylene (OPP) or unleaded polypropylene (CPP), respectively .

When the OPP film 110 of the first film layer 100 is formed of OPP and the light transmissive film 210 of the second film layer 200 is formed of CPP, It is possible to impart gas permeation blocking property and at the same time to impart straightness to the light reflected by the light transmission blocking layer 220, thereby further improving the sharpness of printing by the reflected light.

In the case where the light transmissive film 110 of the first film layer 100 is formed of CPP and the light transmissive film 210 of the second film layer 200 is formed of OPP, The OPP layer formed in the inside can transmit the unique color of the foamed foam together with the light transmission blocking layer 220 to the outside It is advantageous in that it can be effectively blocked.

The light transmission blocking layer 220 of the second film layer 200 may be formed using a milky white pigment, for example.

When a milky white pigment is used, the inherent color of the foamed foam is transferred to the outside by blocking the transmission of light efficiently by the pigment, so that the defective color of the printed layer can be further prevented. In particular, The light passing through the light transmitting film of the layer 200 can be more efficiently reflected by the milky light transmitting and shielding layer, and the pattern of the printed layer by the reflection can be more clearly realized. Further, by forming a milky white background, The overall color is brightened, and in particular, the print pattern of the print layer is opposed to the milky white color so that it can be displayed more clearly.

The adhesive film layer 300 is formed in contact with the second film layer 200 and functions to adhere the foam foam 410 to be described later to the second film layer 200.

The adhesive film 310 constituting the adhesive film layer 300 is formed on both sides of the light transmitting and shielding layer 200 and the foaming layer 400 described below that can be formed of the second film layer 200, For example, polyethylene (PE) can be used.

In the present invention, the adhesive film layer 300 using polyethylene is not formed using a conventional Tie die method, and the adhesive film produced separately is directly used.

That is, when a pressure-sensitive adhesive film layer is formed by a Ti-die method as in the prior art, it takes a long time until the printing ink used for forming the printing layer is completely dried, The present invention has the advantage that such a problem can be solved by directly using a separately produced adhesive film.

Meanwhile, the adhesive film layer 300 included in the heat insulating sheet of the present invention can be formed by gradually stretching the polyethylene resin film to such an extent that its inherent physical properties are not impaired. By gradually elongating the polyethylene resin film, It is possible to lower the manufacturing cost of the entire heat insulating sheet and to further improve the adhesive force.

The foam insulating layer 400 is formed of a foam foam 410 that imparts heat insulation to the heat insulating sheet and is attached to the second film layer 200 through the adhesive film layer 300.

The foam foam 410 constituting the foamed insulation layer 400 can be manufactured by using various polymer materials excellent in heat insulation performance and foaming it.

The foamed foam 410 includes a large number of foamed pores 420 during the foaming process, and the pores serve to reduce the overall weight of the heat-sealed sheet and further improve the heat insulation effect.

Hereinafter, a method of manufacturing the heat insulating sheet according to the present invention will be described with reference to FIG.

As shown schematically in FIG. 3, a method of manufacturing a heat insulating sheet according to an embodiment of the present invention includes the steps of: (S1) forming a print layer on one side of a light-transmitting film to produce a first film; (S2) of forming a light-transmitting / shielding layer on one side of the light-transmitting film to produce a second film; Wherein a pressure-sensitive adhesive film capable of adhering the foamed foam to the second film is placed in contact with the light-transmitting and shielding layer of the second film so that the printed layer of the first film and the light- (S3) for positioning the foamed foam sheet to be adhered to the adhesive film so as to be in contact with the adhesive film; And a laminating step S4 for thermally pressing the first film, the second film, the adhesive film, and the foamed foam sheet so that they adhere to each other.

In the step of producing the first film, the formation of the printing layer may be performed by using various printing methods commonly used in the field of sheet or film production, and the printing layer may be formed on the side opposite to the direction in contact with the second film You may.

In the step of producing the second film, various light-colored pigments may be used to form the light-transmitting barrier layer, or various chromatic pigments may be used which can clearly reveal the printed patterns according to the color of the printed pattern. The use of a milky white pigment as described above can further improve the sharpness of printing due to light reflection.

The alignment step S3 is carried out simultaneously during the formation of the heat-insulating sheet of the present invention by a continuous one-time process, and the alignment is performed such that the print layer of the first film and the light- The adhesive film capable of adhering the foamed foam to the second film is positioned so as to be in contact with the light transmission blocking layer of the second film, and the foamed foam sheet giving the heat insulation property is brought into contact with the adhesive film .

Meanwhile, in the method for manufacturing a heat insulating sheet of the present invention, the step of positioning the adhesive film so as to be in contact with the light transmission blocking layer of the second film may be performed while biaxially stretching the adhesive film.

Example 1

(5 占 퐉) - Polypropylene adhesive layer (5 占 퐉) - Foaming insulating layer (15 占 퐉) - Stretched polypropylene layer (5 占 퐉) - Printed layer To prepare a heat insulating sheet sample 1 according to the present invention.

Example 2

(5 占 퐉) -Printing layer (1 占 퐉) -Stretched polypropylene layer (5 占 퐉) Milky white light transmission blocking layer (1 占 퐉) Polyethylene adhesive layer (5 占 퐉) Foaming insulating layer (15 占 퐉) To thereby prepare a heat insulating sheet sample 2 according to the present invention.

Comparative Example 1

(5 占 퐉), a printed layer (1 占 퐉), a polyethylene adhesive layer (5 占 퐉), and a foamed heat insulating layer (15 占 퐉) to prepare a heat insulating sheet sample 3 according to Comparative Example 1.

Comparative Example 2

(5 占 퐉) - Printed layer (1 占 퐉) - Polyethylene adhesive layer (5 占 퐉) - Foaming insulating layer (15 占 퐉) to prepare Heat Insulating Sheet Sample 4 according to Comparative Example 2.

In the above Examples 1 and 2 and Comparative Examples 1 and 2, layers having the same names were all produced using the same components in the same amounts.

[Print sharpness test]

The heat insulating sheet prepared in Examples 1 and 2 and Comparative Examples 1 and 2 was attached to the concrete wall and the appearance of the sheet was visually checked to confirm the sharpness of the printed pattern. (5 points: highest sharpness, 1 point: lowest sharpness), and the results are shown in Table 1 below.

[Durability test]

The heat-insulating sheet prepared in Examples 1 and 2 and Comparative Examples 1 and 2 was cut into a width of 10 cm x 3 cm and was subjected to a bending test according to ASTM D 700, The bending times were measured and the results are shown in Table 1 below.

division Print sharpness test Durability test Sample 1 (Example 1) 5 1,205 Sample 2 (Example 2) 5 1,046 Sample 3 (Comparative Example 1) 2 432 Sample 4 (Comparative Example 2) 2 358

As can be seen from the results of Table 1, the heat-insulating sheets of Examples 1 and 2 according to the present invention have remarkably improved the print sharpness as compared with the heat-insulating sheets of Comparative Examples 1 and 2.

In addition, the results of Table 1 indicate that the heat-insulating sheets of Examples 1 and 2 according to the present invention have remarkably improved durability as compared with the heat-insulating sheets of Comparative Examples 1 and 2.

100: first film layer 110: light transmitting film
120: print layer 200: second film layer
210: light transmitting film 220: light transmitting layer
300: adhesive film layer 400: foamed insulating layer
410: foam foam 420: foam foam
S1: First film production step S2: Second film production step
S3: Position alignment step S4: Lapping step

Claims (6)

A first film layer having a print layer formed on one side of the light-transmitting film;
A second film layer formed on the first film layer and having a light transmission blocking layer formed on one side of the light transmission film;
An adhesive film layer formed in contact with the second film layer and adhering the foamed foam; And
And a foamed insulation layer formed in contact with the pressure-sensitive adhesive film layer and including a foamed foam that imparts heat insulation property, wherein the printed sharpness and durability are improved. The method according to claim 1,
Wherein the light transmissive film of the first film layer or the second film layer is made of an oriented polypropylene or a casting polypropylene and has improved print sharpness and durability. The method according to claim 1,
Wherein the adhesive film layer is made of polyethylene and has improved print sharpness and durability. The method according to claim 1,
Wherein the light transmission blocking layer includes a pigment having a milky white color (milky white color), and the printed image has improved sharpness and durability. Forming a print layer on one side of the light-transmitting film to produce a first film;
Forming a light transmission blocking layer on one surface of the light transmissive film to produce a second film;
Wherein a pressure-sensitive adhesive film capable of adhering the foamed foam to the second film is placed in contact with the light-transmitting and shielding layer of the second film so that the printed layer of the first film and the light- Positioning the foamed foam sheet so as to be in contact with the adhesive film; And
Wherein the first film, the second film, the adhesive film, and the foamed foam sheet are thermally pressed to each other so as to be adhered to each other, thereby improving the print sharpness and durability. The method of claim 5,
Wherein the step of positioning the adhesive film so as to be in contact with the light transmission blocking layer of the second film improves print sharpness and durability while biaxially stretching the adhesive film.

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