KR20040065084A - Color polyester film for molding vessel - Google Patents

Abstract

PURPOSE: Provided is a colored polyester film, which is attached to glass windows in a car and a building to protect UV and IR, to assure privacy and to prevent a window from being scattered when broken by an external force. CONSTITUTION: The colored and biaxially oriented polyester film is a co-extrudable polyester film having a laminated multilayer structure. The colored polyester film comprises: (A) a particle-containing layer(1) formed of a polyester resin containing 0.2-4.0 wt% of inorganic particles having an average particle diameter of 1-10 micrometers; and (B) a base layer(2) formed of a polyester resin containing 0.01-10 wt% of a dye. Further, (C) a pressure-sensitive adhesive layer(3) and (D) a transparent film layer(4) are laminated on a remaining surface of the particle-containing layer(1) and the base layer(2).

Description

Color polyester film {Color polyester film for molding vessel}

The present invention is attached to the glass of automobiles and buildings to block the ultraviolet rays and heat rays of the sunlight and at the same time when the glass window is suddenly broken by external impact, prevents the scattering of glass fragments in the colored polyester film that can prevent safety accidents It is about.

Polyester resins have excellent physical and chemical properties and are widely used as polymer processed products. In developing film applications, polyethylene terephthalate films are used for a wide range of applications and industrial materials. In particular, the development of the use of substitutes, such as for labeling, transfer, packaging, photographic and image is being actively made. According to Korean Patent Registration No. 252022, a dye mixture composed of a dispersion liquid in which at least one dispersion dye is dispersed in an aqueous paste solution is disclosed. A dye mixture comprising a step of preparing and coating the dye mixture on one surface of a polyester film to form a coating layer, and heating the film so that at least one dye is transferred into the film from the coating layer. A method for producing a colored polyester film is introduced, which has a viscosity of 100 centimeters or less at room temperature. In addition, Japanese Patent Laid-Open No. 1999-67877 discloses a coloring film having at least one colored adhesive layer colored by a coloring agent on at least one side of the transparent film, and the colored adhesive layer is a polyester resin as an adhesive. The colorant is characterized by consisting of a pigment and a polyester-based dispersant. In addition, Korean Patent Laid-Open Publication No. 1999-82060 discloses a biaxially oriented laminated polyester film for automobile window bonding comprising three or more layers including an intermediate layer in which dye is added, and in Japanese Laid-Open Patent Publication No. 2002-13726. A coextruded laminated polyester film having at least three polyester layers containing dyes, wherein the film has an antistatic coating layer on at least one side thereof, the antistatic coating having an intrinsic surface resistance of 10 x 10 ¹⁴ Ω or less. The biaxially-oriented polyester film for windows characterized by having is introduced.

Patent No. 1998-145057 adds 0.1 to 0.01% by weight of a magnesium compound, and adds 100 to 1000 ppm to the total polyester resin by using an anthraquinone dye as a colorant to a polyester resin condensation-polymerized by a conventional method. A method for producing a biaxially stretched colored polyester film, which comprises mixing an ester resin and a polyester resin without a colorant in a predetermined ratio and forming, stretching and heat treating the same, has been introduced. In addition, Japanese Patent Application Laid-Open No. 1998-68300 discloses a coating resin and a solvent comprising one or two or more mixed resins selected from acrylic, vinyl, polyester, and polyamide resins on one side of a polyester film to which a hard coat layer is applied. A method for producing a solar control colored film, which is prepared by applying a coating solution composed of 0.5 to 5% by weight of a dye diluted with 1 to 5% by weight of a benzotriazole-based or triazine-based ultraviolet absorber, is prepared. In addition, Korean Patent Laid-Open No. 1999-18537 discloses a method for producing a solar control colored film in which a release release layer, an adhesive layer, and an antifog layer are formed on a support film.

The solar control film as described above is mainly made of a polyethylene terephthalate film, and is used as a safety reinforcement for the window glass not only to block the sunlight but also because of the strong physical properties of the polyethylene terephthalate film. Such a film is mainly used to reduce the solar light transmittance to increase the cooling and heating efficiency in the car and to prevent glare, and to prevent the aging of the skin by UV blocking. In addition, it is possible to prevent the fragments of the window glass that is broken due to an accident or a strong impact to scatter. That is, this is performed by the strong physical properties and adhesion of the polyethylene terephthalate film used as a support.

In general, when the window film is classified functionally, it can be classified into a solar control film, a shatterproof film, a heat insulating film, and the like. The heat insulating film is a film that attaches a deposition film to the window glass to block the sun, and is concerned about energy saving. With this increase, the demand for building window films is increasing. Moreover, the heat insulation film apply | coats an aluminum protective layer to the polyethylene terephthalate film of 25 or 100 micrometer thickness, and a pressure-sensitive adhesive is apply | coated to the opposite surface. The film having such a structure is attached to the inside of the window glass to have a function of improving the indoor environment by the reflection or absorption of sunlight.

Glass scattering prevention film is a film which aims at preventing the scattering of the fragments even if glass is broken by apply | coating a pressure-sensitive adhesive to a transparent polyethylene terephthalate film, peeling off an overcoat film, and apply | coating to the inside whole surface of a window glass. In most cases, the scattering prevention film also functions as a heat insulating film. That is, the blocking effect of sunlight is great, cooling and heating efficiency is increased, and secondary disasters can be prevented when glass is broken. In addition, there is a half mirror effect, and the appearance of the building is improved. Solar control film is mainly made of automotive tinting film, which was originally intended for light blocking, but its main purpose is shifting to car decoration. Most solar control films have functions that combine the functions of existing thermal insulation films and glass shatterproof films.

Therefore, the present invention provides a window film that can be bonded to the glass of automobiles and buildings to block the ultraviolet rays and heat rays of the solar light, while protecting the privacy from the outside and efficiently preventing the scattering of debris in case of damage to the glass window by external force. For that purpose.

1 is an exemplary cross-sectional view (1) of the present invention colored polyester film

Figure 2 is an exemplary cross-sectional view (2) of the present invention colored polyester film

Figure 3 is a cross-sectional view (3) of the present invention colored polyester film

Figure 4 is a cross-sectional view (4) of the real name colored polyester film

Figure 5 is an exemplary cross-sectional view (5) of the real name colored polyester film

6 is an exemplary cross-sectional view (6) of the present invention colored polyester film

<Description of Major Symbols in Drawing>

1: particle layer 2: base layer

3: adhesive layer 4: transparent film layer

In order to provide the above object, the present invention comprises a polyester particle layer (A layer) and a base layer (B layer) containing 0.2 to 4% by weight of inorganic particles having an average particle size of 1 to 10 µm. In the biaxially stretched polyester color film (1) and the color film (1) in which at least one layer of A) and the base layer (B) contains 0.01 to 10% by weight of the dye layer, The color film 3 including the pressure-sensitive adhesive layer (C layer) formed on one side and the color film 3 including the pressure-sensitive adhesive layer (C layer) formed on the other side of the base layer (B layer) and the In the color film 2, the color film 4 in which the transparent film layer (D layer) is laminated on the outer side of the adhesive layer (C layer), and in the color film 4, the base layer (B) and the transparent film The color film 5 and the color film 6, characterized in that the pressure-sensitive adhesive layer (C layer) is laminated on one of the outer surfaces of the layer (D layer) By this, the present invention was completed. In order to explain in more detail with respect to the color film of the present invention described above, the structure of the colored film of the present invention is illustrated in FIGS.

In the present invention, the measurement of the main physical properties, 60 degrees glossiness was determined by the method of ASTM D 523, haze (haze) was measured by the method of ASTM D 1003.

Example 1

Polyethylene terephthalate having an intrinsic viscosity of 0.65 dl / g without particles as the first raw material (PM ₁ ) and polyethylene terephthalate containing 5 wt% of silicon dioxide having an average particle size of 4 μm as the second raw material (PM ₂₎ ), Polyethylene terephthalate containing 5.5% by weight, 3.5% by weight and 1.0% by weight of dyes "Red GFP", "Blue RBL" and "Yellow GG" manufactured by Clariant Inc. are used as the third raw material (PM ₃ ).

The raw materials (PM ₁ ), (PM ₂ ), (PM ₃ ) and (PM ₄ ) are combined and dried in the weight percent ratios shown in Table 1, then laminated in two layers in the feed block and extruded through a coextrusion die The sheet was prepared by cooling in a casting drum. The sheet was stretched 3.0 times at a temperature in the range of 75 to 130 ° C. in the longitudinal direction, and then stretched 3.3 times at a temperature in the range of 90 to 145 ° C. in the transverse direction, followed by heat treatment at a temperature in the range of 215 to 235 ° C. to obtain a film having an average thickness of 25 μm. Got. The thickness of each layer (A / B) produced was 2 μm / 23 μm.

Table 1

division Floor type Layer thickness (㎛) Content (% by weight) Remarks PM1 PM2 PM3 Example 1 A 2 35 45 20 Lamination B 23 80 0 20 Example 2 A 2 50 30 20 Lamination B 23 80 0 20 Comparative Example 1 - 25 35 45 20 fault Comparative Example 2 - 25 50 30 20 fault

Example 2

In the same manner as in Table 1 and Example 1, a film having an average thickness of 25 μm was obtained.

The thickness of each layer (A / B) manufactured was 2 micrometers / 23 micrometers.

Comparative Example 1

Polyethylene terephthalate having an intrinsic viscosity of 0.65 dl / g without particles as the first raw material (PM ₁ ), and polyethylene terephthalate containing 5 wt% of silicon dioxide having an average particle size of 4 μm as the second raw material (PM ₂₎ ) to, and the Clariant Corp. dye "Red GFP", "Blue RBL " and "Yellow GG" a polyethylene terephthalate containing respectively 5.5 wt%, 3.5 wt% and 1.0 wt% of phthalate in the third raw material (PM ₃₎ . The raw materials (PM ₁ ), (PM ₂ ) and (PM ₃ ) was dried at a weight percentage ratio shown in Table 1, extruded into a single layer and cooled in a casting drum to prepare a sheet.

The sheet was stretched 3.0 times in the longitudinal direction at a temperature in the range of 75 to 130 ° C., then stretched 3.3 times in the transverse direction at a temperature in the range of 90 to 145 ° C. and heat-treated in the temperature range of 215 to 235 ° C. to obtain an average thickness of 25 μm. A film was obtained.

Comparative Example 2

In the same manner as in Table 1 and Comparative Example 1, a film having an average thickness of 25 μm was obtained.

In Table 2 below, the amount of particles, glossiness, and turbidity of Examples and Comparative Examples are shown.

Comparing the Example with the Comparative Example, the Example shows the appropriate glossiness and low haze, while the Comparative Example shows low glossiness and high haze.

TABLE 2

division Floor type Layer thickness (㎛) Silica Content (wt%) Glossiness (%) Turbidity (%) Remarks Example 1 A 2 2.25 67 31 Lamination B 23 0 133 Example 2 A 2 1.50 87 20 Lamination B 23 0 145 Comparative Example 1 - 25 2.25 23 91 fault Comparative Example 2 - 25 1.50 29 82 fault

Color polyester film of the present invention has excellent light-shielding properties as described above, excellent coating properties for adhesives such as adhesives or adhesives, and when used in a glass window of a car or a building, it blocks only ultraviolet rays and heat rays of sunlight. In addition, it is possible to prevent exposure to the outside due to coloring and to prevent scattering of glass fragments even when the glass is broken by impact, and to have an effect that can be used for a relatively long time even after processing into a window adhesive film. It has a high industrial value effect.

Claims (3)

In the coextruded polyester film having a laminated structure of a plurality of layers, a particle layer (A layer) made of a polyester resin containing 0.2 to 4.0% by weight of inorganic particles having an average particle diameter of 1 to 10 µm and a dye to 0.01 to It has a base layer (B layer) made of polyester resin containing 10% by weight, and the pressure-sensitive adhesive layer (C layer) and the transparent film layer (on the other side of the particle layer (A layer) and the base layer (B layer) Layer D) biaxially stretched polyester color film characterized in that the lamination. The biaxially stretched polyester color film according to claim 1, wherein the inorganic particles in the particle layer (A layer) are silica particles. The biaxially stretched polyester color film according to claim 1, wherein the particle layer (A layer) has a thickness of 1 to 10 µm.