KR20000027863A - Solar controlling film - Google Patents

Abstract

PURPOSE: Solar controlling film is provided which is prevented various trouble due to the static electricity during preparing process and adhesion of dust and other material as well as separation of dyestuff layer. CONSTITUTION: The film comprises a basic film(1) which is treated by incorporating of anti static agent; an adhesive layer(2) which is laminated by a pore on the film and blended by a dyestuff; polyethyleneterephthalate film(3) protecting the dyestuff layer which is laminated by the adhesive layer(2); a bonding layer(4) which is laminated on the polyethyleneterephthalate film and contains an ultra violet absorption agent and a thermic rays absorption agent; and a release film(5) which is laminated on the bonding layer and coated with a silicone. The basic film(1) is comprised of 0.1 to 10% by weight of polyalkyleneglycol or derivatives thereof and 0.1 to 10% by weight of copolymer of styrene-sodium sulfonate and a carboxyl group containing monomer. Thereby, it is possible to prevent various trouble due to the static electricity during preparing process adhesion of dust and other material as well as separation of dyestuff layer by using the solar controlling film.

Description

Solar control film

The present invention is applied to a glass window of a car, building, exhibition hall, etc. to block solar light and protect privacy from the outside, and also to prevent safety accidents by preventing scattering of glass fragments in case of breakage of window glass by external force. The present invention relates to a control film, in particular, to prevent various troubles due to static electricity during the manufacturing process, to prevent dust and foreign matter from adhering after construction, to prevent separation of the dye layer, and to easily manufacture It can be related to solar control film.

In general, the solar control film is made of polyethylene terephthalate (PET) film, and the solar control film is used as a solar and safety film because it is used for the safety of the window glass due to the strong property of the polyethylene terephthalate film. Also known as (solar & safety film).

The specific purpose of use of such a solar control film is as follows.

First, it is used to block sunlight. In other words, by reducing the solar light transmittance, it is possible to increase cooling and heating efficiency and to prevent glare, to preserve privacy by a half mirror effect, and to prevent skin aging by blocking ultraviolet rays. We can plan.

Secondly, it is used to prevent a second accident, which may occur due to the scattering of fragments of the window glass broken by an accident or a strong impact. That is, this can be performed by the strong physical properties and adhesion of the polyethylene terephthalate film used as the substrate (support).

Third, it is used for decorative purposes to enhance the appearance quality of cars or buildings by expressing various colors by coloration.

An important factor in manufacturing the solar control film used for the purpose as described above is to absorb visible light in a specific wavelength range to express color and to select a durable dye, and to increase the heating and cooling efficiency Choice of materials that can block sunlight energy and compatibility with other additives and the applied resin.

Conventional methods for expressing color include dyeing a base film or milling an insoluble pigment to separate the adhesive layer to produce a product, but these methods are expensive in manufacturing and complicated in manufacturing process. Do. In addition, a method of laminating a deposition layer of aluminum or the like on a base film and laminating an adhesive layer and a release film on the base film was used, but the products applied with such a metal deposition dazzle the outside people by the reflection of sunlight. In addition to this, the reflectance is high in the wavelength range of the visible light region, the indoor illumination is reduced, which increases the indoor lighting cost.

Meanwhile, as the base film of the conventional solar control film, polyethylene terephthalate, which has excellent mechanical strength, excellent heat resistance and chemical resistance, and excellent transparency, was mainly used, but the polyethylene terephthalate film has high electrical insulation, which facilitates generation and accumulation of static electricity. This causes adverse effects on manufacturing processes such as electrostatic shock and sparking in coating, winding, cutting, and packaging processes, resulting in reduced workability and productivity, and the attachment of cotton paper and foreign matter to the surface of the film. The problem is that the quality of the film is also reduced.

In order to solve the drawbacks of the polyethylene terephthalate film, a method of increasing the antistatic property by applying an antistatic agent to the surface of the film or incorporating it into the inside of the film is proposed, but the method of applying the antistatic agent to the surface of the film is a coating process separately. Not only does it cause an increase in manufacturing cost, but also the antistatic effect is significantly reduced by friction or washing or over time.

On the other hand, in the case where the release film is laminated to the base film on the adhesive layer containing the dye, when the release film is peeled off, the adhesive layer is attached to the window glass surface so that the dye is directly exposed to the sunlight and the dye may be released during construction. In addition, after being attached to the window glass, the dye may be directly exposed to sunlight and discolored by destruction of the dye molecules.

The present invention has been made in view of the conventional problems as described above, it is possible to prevent various troubles due to electrostatic problems during the manufacturing process, to prevent the adhesion of dust and foreign matter after construction, and also to separate the separation of the dye layer It is an object of the present invention to provide a solar control film which can be prevented and can be easily produced.

1 is a configuration diagram showing an example of a solar control film according to the present invention.

<Explanation of symbols for the main parts of the drawings>

In order to achieve the above object, the solar control film according to the present invention, the base film subjected to the antistatic treatment by the incorporation of an antistatic agent; An adhesive layer laminated on the base film and blended with a dye; A polyethylene terephthalate film laminated on the adhesive layer to protect the dye layer; An adhesive layer laminated on the polyethylene terephthalate film and containing an ultraviolet absorber and a heat ray absorber; And, it comprises a release film laminated on the pressure-sensitive adhesive layer and coated with silicon.

Other features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings.

According to the present invention, as shown in Figure 1, the base film 1 is used as an antistatic agent is mixed with the antistatic agent is made of an antistatic treatment to improve the antistatic properties.

That is, as the base film 1, it contains 80 weight% or more of polyethylene terephthalates with the intrinsic viscosity 0.4-1.0 with respect to the whole, 0.1-10 weight% of polyalkylene glycol or derivatives thereof, and styrene whose molecular weight is 10,000 or more. A biaxially orientated polyethylene terephthalate film containing 0.1 to 10% by weight of a polymer of sodium sulfonate salt or a copolymer of styrene-sodium sulfonate and a carboxyl group-containing monomer is used. The antistatic agent used for the antistatic treatment of the base film 1 is preferably added during the transesterification reaction or the esterification reaction or during the condensation reaction. Although the thickness of the base film 1 is determined in consideration of the kind of glass window applied, final required physical property, etc., it is preferable to set it as the range of 10-100 micrometers.

The polyethylene terephthalate film (3) used to protect the adhesive layer (2) containing dye is made by laminating after coating the adhesive layer (2) containing dye on the base film (1), the thickness of which is In consideration of the overall thickness, the range of 12 to 38 µm is preferable, and the haze is preferably made of a high transparent film having a haze of about 1%.

The dye contained in the adhesive layer 2 is used diluted in a certain amount of solvent in order to increase the working area with the resin and to provide convenience of coating. Therefore, solvent soluble dyes should be used, and in particular, it is preferable to use 1: 2 metal complex dyes having excellent daylight fastness. Although the usage-amount of a solvent for diluting dye changes with a solvent, it is preferable to use it in the range about 5 to 15 times of used dye. If the amount of the solvent used is 5 times or less of the dye amount, the working area with the resin is small, and sufficient compounding is not achieved.If the amount of the solvent is 15 times or more the amount of the dye, the solvent is not dried enough during the manufacturing process, and the surface of the coating is grown. The distance occurs.

The heat ray absorbent contained in the pressure-sensitive adhesive layer 4 constituting the solar control film according to the present invention is an organic compound having a large absorption wavelength range in the near infrared region (900 nm to 2,100 nm), and has a structure such as anthraquinone and polymethine. In addition, the amount of the heat ray absorbent is fluid depending on the degree of adhesion after adhesion, but is preferably about 0.05 to 0.1% by weight of the adhesive.

In the case of the pressure-sensitive adhesive of the pressure-sensitive adhesive layer 4, a high adhesive of a permanent type is preferably applied to prevent layer separation from occurring during use of the solar control film.

The adhesive constituting the adhesive layer 2 for laminating the base film 1 and the polyethylene terephthalate film 3 for protecting the dye, or the adhesive layer 4 for actually attaching the solar control film to the glass window surface As an adhesive which comprises it, either of acrylic resin, such as a polymethyl methacrylate or a methacrylic acid ester copolymer, urethane type, epoxy type, and vinyl type resin can be used. Among these resins, acrylic resins having excellent weather resistance and water resistance and excellent compatibility with dyes, ultraviolet absorbers and heat ray absorbers are most preferably used as the adhesive or pressure sensitive adhesive.

Since the solar control film according to the present invention is a functional film attached to a glass window and is used for a long time, it is exposed to ultraviolet rays having a wavelength range of 280 nm to 380 nm in electromagnetic waves. Therefore, in order to prevent embrittlement of the pressure-sensitive adhesive layer 4, to prevent skin aging of people living in the room, and to prevent fading of furniture and the like, it is preferable that an ultraviolet absorbent is added to the pressure-sensitive adhesive layer 4.

Since the polyethylene terephthalate film 3 is a material which cannot penetrate the ultraviolet region of 310 nm or less in its structure, the benzotria having excellent ability to absorb ultraviolet rays in the wavelength region of 310 nm or more is used as the ultraviolet absorber contained in the pressure-sensitive adhesive layer 4. Preference is given to using a sol system. The amount of the ultraviolet absorber added is preferably 1 to 5% of the weight of the pressure-sensitive adhesive. If the amount of the ultraviolet absorber is too small, the ability of absorbing ultraviolet rays is poor. If the amount of the ultraviolet absorber is too large, the coating surface may have a problem such as cloudiness on the surface after application.

The release film 5 laminated | stacked on the adhesion layer 4 is formed by coating silicon | silicone on a film cross section, and can protect the adhesive layer 4 from a foreign material. The thickness of the release film 5 is preferably in the range of approximately 25 to 38 μm, but is not necessarily limited to the above range.

Solar control films were prepared according to the following examples and comparative examples, and their physical properties were evaluated according to the following methods, and the results are shown in Tables 4 and 5.

<Adhesive force>

After aging the solar control film prepared according to the Examples and Comparative Examples for 7 days at room temperature, peel off the release film and bonded to a pre-prepared glass plate of 3mm thickness 25mm in width, 25cm in length and then 2 times by a roll press of 2kg A sample was prepared by reciprocating compression, and the resultant was stored at room temperature for 24 hours, and then adhesive strength was evaluated by measuring 180 ° peel strength using a tensile strength tester.

<Visible light transmittance and UV blocking rate>

After aging the solar control film prepared according to the Examples and Comparative Examples for 7 days at room temperature, peel off the release film, prepare a sample to be 3cm wide, 4.5cm long, and then visible in 370nm region using a UV-VIS spectrometer Light transmittance and UV blocking rate were evaluated.

Solar Energy Distribution Measurement

After aging the solar control film prepared according to Examples and Comparative Examples for 7 days at room temperature, the release film was peeled off and the sample was prepared to be 3 cm wide and 4.5 cm long, and then 300 to 300 through an U-4001 optical analyzer manufactured by Hitachi, Japan. The solar energy distribution in the 2100 nm region was measured.

<Surface resistance>

The solar control film prepared according to the Examples and Comparative Examples was allowed to stand for 1 hour under 23 ° C. and 60% relative humidity, and then applied with a voltage of 500 volts using a model R-503 type surface resistance meter manufactured by Kawaguchi, Japan. The resistance was evaluated. The lower the surface resistance, the better the antistatic effect of the film.

<Transparency>

The haze value of the ratio of scattered light to incident light as a% value of the solar control film prepared according to Examples and Comparative Examples was measured with a model NDH-1001DP type haze meter manufactured by Nippon Densoku Co., Ltd. Transparency was evaluated.

<Surface tension>

The surface tension was evaluated by measuring the level of coagulation of the Toresuji standard solution of Nippon Hagwang Pharmaceutical Co., Ltd. on the surface of the solar control film prepared according to Examples and Comparative Examples. Higher surface tension indicates better adhesion. The unit is expressed in dyne / cm.

Weatherability

Using the accelerated weather resistance tester (Atlas, Model C165 / XW) on the solar control film prepared according to Examples and Comparative Examples, the color difference value (∧E) of the sample before and after the evaluation test was measured according to JIS A 5759. The weather resistance of the sample was evaluated by measuring the degree of discoloration.

<Example 1>

Coating on one side of the transparent polyester film (Saehan Co., Ltd., XG-202, 25 μm) in which an antistatic agent is mixed inside with a coating liquid as shown in the following Table 1a, followed by drying at 100 ° C. for 1 minute. The thickness of the coating layer is set to 5 μm, and then a high-transparent polyethylene terephthalate film (Saehan Co., Ltd., XG-732, 25 μm) is laminated on the adhesive layer and aged at room temperature for 24 hours to laminate the three-layer structure. I made a film. The film was coated with a coating solution prepared in the following fabric 1b on high-transparent polyethylene terephthalate and dried at 100 ° C. for 2 minutes so that the thickness of the coating layer was 15 μm, followed by a silicone release film (Japan Doserosa, SQ). Type, 25 µm) to prepare a solar control film.

ingredient content Acrylic resin (Samyoung Ink, BPF 4891X) 100.0 g Isocyanate Curing Agent (Samyoung Ink, BQS 8512) 0.687 g Dye (Shibagai company, brand name ORAZOL BROWN) 2.0 g Methyl ethyl ketone 13.0 g

ingredient content Acrylic resin (Samyoung Ink, BPF 5398M) 100.0 g Isocyanate Curing Agent (Samyoung Ink, BQS 8512) 0.687 g Heat absorber (Japanese chemical company, brand name IRP023) 0.05g Ultraviolet light absorber (Chiba article, brand name TINUVIN 454) 1.0 g Methyl ethyl ketone 13.0 g

<Example 2>

In the same manner as in Example 1 to prepare a solar control film with the composition shown in Table 2a and Table 2b.

ingredient content Acrylic resin (Samyoung Ink, BPF 4891X) 100.0 g Isocyanate Curing Agent (Samyoung Ink, BQS 8512) 0.687 g Dye (Shibagai company, brand name ORAZOL BROWN) 2.0 g Methyl ethyl ketone 13.0 g

ingredient content Acrylic resin (Samyoung Ink, BPF 5398M) 100.0 g Isocyanate Curing Agent (Samyoung Ink, BQS 8512) 0.687 g Heat absorber (Japanese chemical company, brand name IRP023) 1.0 g Ultraviolet light absorber (Chiba article, brand name TINUVIN 454) 3.0 g Methyl ethyl ketone 13.0 g

Comparative Example 1

A solar control film was prepared by the same method as in Example 1, using a transparent polyester film (Saehan Co., Ltd., XG-200, 25 μm) having no antistatic agent incorporated into the base film, and having the composition of Tables 1A and 1B. Prepared.

Comparative Example 2

A transparent polyester film (Saehan Co., Ltd., XG-200, 25 μm), in which an antistatic agent was not incorporated into the base film, was coated with a coating liquid having the composition shown in Table 3 on one side of the film, and then 100 After drying at 2 ° C. for 2 minutes so that the thickness of the coating layer was 15 μm, a solar control film was prepared by laminating with an execon release film (DOSECEL, SQ TYPE, 25 μm).

ingredient content Acrylic resin (Samyoung Ink, BPF 5398M) 100.0 g Isocyanate Curing Agent (Samyoung Ink, BQS 8512) 0.687 g Dye (Shibagai company, brand name ORAZOL BROWN) 2.0 g Heat absorber (Japanese chemical company, brand name IRP023) 3.0 g Ultraviolet light absorber (Chiba article, brand name TINUVIN 454) 3.0 g Methyl ethyl ketone 13.0 g

Adhesive force (gF) Surface resistance (Ω /?) Haze (%) Surface tension UV protection rate (%) Example 1 578 1.9 × 10 ¹² 3.9 47 64 Example 2 574 3.4 × 10 ¹² 4.3 47 99 Comparative Example 1 577 8.6 × 10 ¹⁶ 4.4 36 64 Comparative Example 2 569 6.9 × 10 ¹⁶ 3.2 36 99

In Table 4, the values of surface resistance and surface tension indicate the values on the back surface of the coating.

Solar energy distribution (%) Color difference value before and after weather resistance test (∧E) Transmittance reflectivity Water absorption Example 1 32 5 63 0.36 Example 2 24 4 72 0.12 Comparative Example 1 34 4 62 0.35 Comparative Example 2 27 4 69 1.21

As can be seen from Table 4 and Table 5, it can be seen that the solar control films of Examples 1 and 2 using the base film 1 in which the antistatic agent is mixed therein exhibit excellent properties in various physical properties.

According to the solar control film which concerns on this invention comprised as mentioned above, after apply | coating the adhesive bond layer 2 in which the dye was mix | blended to the base film 1 processed antistatically, the polyethylene terephthalate film 3 is laminated | stacked, and the said polyethylene By laminating the pressure-sensitive adhesive layer 4 containing a UV absorber and a heat ray absorber on the terephthalate film 3, it exhibits excellent physical properties, and therefore, it is possible to prevent various troubles due to static electricity during the manufacturing process by antistatic treatment. Dust and foreign matter can be prevented from adhering after construction, and the separation of the dye layer can be prevented by improving durability.

Claims (3)

A base film subjected to antistatic treatment by incorporation of an antistatic agent; An adhesive layer laminated on the base film by coating and blended with a dye; A polyethylene terephthalate film laminated by the adhesive layer to protect the dye layer; An adhesive layer laminated on the polyethylene terephthalate film and containing an ultraviolet absorber and a heat ray absorber; And, And a release film laminated on the pressure-sensitive adhesive layer and coated with silicon. The said base film is 0.1-10 weight% of polyalkylene glycol or its derivative (s), and the polymer of the styrene-sulfonic-acid sodium salt which has a molecular weight of 10,000 or more, or the copolymer of the styrene-sulfonic-acid sodium salt, and a carboxyl group-containing monomer is 0.1-. Solar control film, characterized in that the biaxially oriented polyester film contained 10% by weight. According to claim 1, wherein the heat-absorbing agent contained in the pressure-sensitive adhesive layer is used as an organic compound having an absorption band in the near infrared region, the ultraviolet absorber contained in the pressure-sensitive adhesive layer is contained in the range of 1 to 5% relative to the weight of the pressure-sensitive adhesive Solar control film, characterized in that.