KR20000054985A - Polyester film for coating llluminating device and method for coating llluminating device using the same - Google Patents

Abstract

PURPOSE: A biaxial oriented polyester film which conserves dispersion- preventing property and which can be applied to illumination apparatuses of various types is provided. An illumination apparatus coated with the polyester film and a method for coating illumination apparatuses of various types using the polyester film are also provided. CONSTITUTION: A biaxial oriented polyester film according to the present invention comprises 0.001 to 30 wt% of inert slipping agent of which average particle diameter is 0.001 to 20 micrometer and heat shrinkage of the film at 150degees celsius is 10 to 70%. A method for coating a heat shrinking film according to the present invention comprises the steps: a) three-dimensionally processing a heat shrinking film to meet the shape of an illumination apparatus; b) inserting the processed heat shrinking film into the illumination apparatus; and c) heat treating the heat shrinking film inserted into the illumination apparatus to tightly attach the film to the illumination apparatus.

Description

Polyester film for coating luminaire and coating method using the film {Polyester film for coating llluminating device and method for coating llluminating device using the same}

The present invention relates to a biaxially oriented polyester film for covering a luminaire, a luminaire covered with the film and a method for covering the luminaire.

Conventional lighting fixtures have a problem that they are easily damaged due to the impact because glass is exposed to the outside. In addition, when broken, the fluorescent material in the lighting fixtures can be diffused into the atmosphere, which may be harmful to the human body. Broken glass fragments are scattered diligently and are not easy to be cleaned. Therefore, there is always a great risk of safety accidents. In order to solve this problem, a method of preventing scattering of glass fragments when a lighting device is broken by coating a polymer film on the lighting device has been proposed.

However, the inventors of the present invention, when testing the conventional polymer film for coating the lighting fixture, it was found that the scattering effect is excellent, but the following problems in the workability and application range.

That is, the coating method of the conventional safety film is made by the packaging method as shown in Fig. 1, while the conventional luminaire coating polymer film is suitable for the rod-like lighting fixture as shown in Fig. 1, but is U-shaped or donuts. Lighting fixtures that have curved portions, such as shaped lighting fixtures have problems that are not suitable in terms of adhesion and workability of the film to the lighting fixtures.

Accordingly, an object of the present invention is to provide a biaxially oriented polyester film for luminaire coating that can be satisfactorily applied to various types of lighting fixtures such as the U-shaped or donut-shaped lighting fixtures while maintaining the conventional shatterproof property. It is.

Another object of the present invention is to provide a luminaire coated with the polyester film according to the present invention.

Still another object of the present invention is to provide a method capable of coating the polyester film according to the present invention to various kinds of lighting fixtures.

1 is a schematic diagram for explaining a method for covering a safety film on a lighting apparatus according to a conventional packaging method.

Figure 2 is a schematic view for explaining a tube method that can be applied to the heat-shrinkable polyester film according to the present invention to a lighting fixture of various shapes with good workability.

In order to achieve the above object of the present invention, the present invention comprises 0.001 to 30% by weight of an inert lubricant having an average particle diameter of 0.001 to 20㎛, and a biaxially oriented polyester, characterized in that the heat shrinkage at 150 ° C is 10 to 70%. Provide a film.

In the present invention, the inert lubricant is calcium carbonate, dolomite, glass spare, glass fiber, talc, kaolin, silica, barium sulfate, aluminum silicate, alumina, titanium dioxide, monovinyl compound having one aliphatic unsaturated bond in the molecule and At least one selected from the group consisting of a copolymer of a compound having two or more aliphatic unsaturated bonds in the molecule, a thermosetting phenol resin, a thermosetting phenol resin, a thermosetting epoxy resin, a thermosetting urea resin, a benzoguanamine resin and a fine powder of a fluorine resin as a crosslinking agent. It is preferable to include the above.

In order to achieve the other object of the present invention, the present invention also provides a lighting device characterized in that it is coated with a biaxially oriented polyester film according to the present invention.

In order to achieve another object of the present invention, the present invention also comprises the steps of three-dimensional processing of the heat-shrinkable film to match the shape of the lighting fixture; Inserting the third processed heat-shrinkable film into the luminaire; And heat-treating the heat-shrinkable film inserted into the lighting fixture to bring the heat-shrinkable film into close contact with the lighting fixture.

Hereinafter, the present invention will be described in detail.

The heat-shrinkable polyester film according to the present invention is composed of a polyester resin such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN) or the like, or a copolyester resin having ethylene terephthalate or ethylene naphthalate as a main structural unit. When the heat treatment at 150 ℃ 30 minutes, the heat shrinkage is characterized in that 10 to 70%, preferably 25 to 70%.

The said polyester resin can be manufactured by polycondensing the acid component which has aromatic dicarboxylic acid as a main component, and the glycol component which has alkylene glycol as a main component. Specific examples of the aromatic dicarboxylic acid include diethylene terephthalate, terephthalic acid, isophthalic acid, dimethyl-2,5, -naphthalenedicarboxylic acid, diphenyldicarboxylic acid, diphenyletherdicarboxylic acid and anthraceneca Carboxylic acid, α, β-bis (2-chlorophenoxy) ethane-4,4, -dicarboxylic acid, and the like, and dimethyl terephthalate is particularly preferable.

Specific examples of the alkylene glycol include ethylene glycol, trimethylene glycol, tetramethylene glycol, pentamethylene glycol, hexamethylene glycol, and the like, and ethylene glycol is particularly preferable.

The copolyester is a main repeating unit consisting of ethylene terephthalate or ethylene naphthalate, the mole fraction of the ethylene terephthalate or ethylene naphthalate is preferably at least 60 mol%. Specific examples of the copolymerizable components include diol components such as diethylene glycol, propylene glycol, butanediol, neopentyl glycol, 1,4-cyclohexane dimethanol, and 5-sodium sulfolesosinol, and isophthalic acid and p-β-oxyepoxy. Dicarboxylic acid components such as benzoic acid, 2,6-naphthalenedicarboxylic acid, 4,4'-diphenyldicarboxylic acid, 5-sodium sulfoisophthalic acid, and polyfunctional acids such as trimellitic acid and pyromellitic acid Carboxylic acid.

As the method for producing the polyester resin, any of a transesterification method and a direct polymerization method can be applied. In addition, either batch or continuous may be employed.

In the case of employing the transesterification method, the transesterification catalyst is not particularly limited. For example, alkali-metal compounds such as magnesium compounds, zirconium compounds, sodium compounds, potassium compounds, calcium compounds, strontium compounds, barium compounds, and cobalt compounds, zinc compounds, and manganese compounds may be selected and used in the reaction system. . The polymerization catalyst is not particularly limited either, and may be suitably selected from antimony compounds, germanium compounds and titanium compounds.

On the other hand, the polyester film according to the present invention is an inert lubricant having an average particle diameter of 0.001 to 20㎛ in order to control the running property, winding resistance, wear resistance and the like of the film, containing 0.001 to 30% by weight of inorganic or organic particles insoluble in the polyester resin. do. As the inorganic particles, any of known particles such as calcium carbonate, dolomite, glass spare, glass fiber, talc, kaolin, silica, barium sulfate, aluminum silicate, alumina, or titanium dioxide may be used. In addition, as the organic particles, a copolymer of a monovinyl compound having one aliphatic unsaturated bond in a molecule and a compound having two or more aliphatic unsaturated bonds in a molecule as a crosslinking agent, a thermosetting phenol resin, a thermosetting phenol resin, a thermosetting epoxy resin, and a thermosetting element Fine powders, such as resin, benzoguanamine resin, or a fluororesin, can be used. As said inert lubricant, you may mix and use two or more types.

The heat shrinkable polyester film according to the present invention can be prepared by the following conventional method. Specifically, the polyethylene terephthalate is melt-extruded at a temperature of 265 to 305 ° C, closely adhered to the rotating cooling drum by an electrostatic application method, and cooled and solidified. The amorphous sheet (sheet) thus prepared is subjected to a longitudinal drawing process, which may be used in any one or multiple drawing methods. The lateral stretching process may use a conventional tenter method or the like.

Next, a method of coating the heat shrinkable film according to the present invention to a lighting fixture will be described.

FIG. 2 is a schematic view for explaining a novel method (referred to as a tube method) capable of coating a heat-shrinkable polyester film according to the present invention to a lighting fixture of various shapes with ease.

Referring to FIG. 2, first, the heat shrinkable film is cut to a suitable size in consideration of the size of the lighting fixture (a). Subsequently, the film is processed into a tubular shape in consideration of the shape of the luminaire (b). Subsequently, the heat-shrinkable film processed into the tubular shape is inserted into the luminaire (c), and heat treated at about 150 ° C. for 30 minutes (d) to close the heat-shrinkable film to the luminaire (e). Complete the manufacture of luminaires covered with a film.

Thus, by using the coating method shown in FIG. 2, the U-shaped and donut type lighting fixtures which were difficult to coat by the conventional coating method shown in FIG. 1 can also be coat | covered easily with workability. In addition, since the cutting of the heat-shrinkable film depends only on the size such as the length and outer diameter of the luminaire, not the shape of the luminaire, it is easy to standardize the cutting work.

In the coating method, it should be noted that in the step (b) of processing the heat-shrinkable film into a tubular shape, the difference between the longitudinal length (l) of the cut film and the length of the circumference of the cross section of the luminaire corresponds to the heat shrinkage ratio of the film. It shouldn't be longer than that. If the difference is greater than the length corresponding to the heat shrinkage rate, the length of the circumference of the tube cross-section is greater than the length of the circumference of the luminaire cross section even after the heat treatment step after the insertion step, so that the film does not adhere to the luminaire sufficiently. . In such a situation, a gap exists between the film and the luminaire, and when the luminaire is destroyed, glass fragments are scattered through the gap.

When the heat shrinkage rate of the heat shrinkable film is less than 10%, if the tube is manufactured to eliminate the gap between the film and the light fixture after the heat treatment during the tube processing, the difference between the cross-sectional diameter of the tube and the cross-sectional diameter of the light fixture is reduced, This means that the process of inserting the film into the luminaire must be complex and sophisticated. This inevitably leads to an increase in process time, which in turn adversely affects productivity.

Hereinafter, the present invention will be described in detail with reference to Examples, but the scope of the present invention is not limited to the following Examples.

In Examples and Comparative Examples of the present invention, various performance evaluation of the produced polyester film was performed by the following method.

(1) heat shrinkage

The specimen of the film was cut into 20 mm × 200 mm, placed in an oven maintained at 150 ° C., left for 30 minutes, and the length thereof was measured to express shrinkage in percentage.

(2) working time

The film was cut and processed to measure the time required to wrap the luminaire (the time required before the heat treatment step). The time is expressed as the ratio of the time taken to wrap the fluorescent lamp of the rod by the packaging method shown in FIG.

(3) Determination of scattering amount of broken glass

After measuring the initial mass of the luminaire, it is dropped to the floor at a height of 2 m and broken. The remaining portion along with the socket portion was then collected and the mass was measured and the mass of the lost portion was expressed as a percentage relative to the initial mass.

First, prior to the embodiment will be described a method for producing a polyester film having different thermal shrinkage.

Manufacturing Method of Film A

(1) polymerization method

Dimethyl terephthalate and ethylene glycol were mixed at a ratio of 1 to 2, and calcium acetate was added 0.07% by weight relative to dimethyl terephthalate as a transesterification catalyst to prepare a polyethylene terephthalate monomer (BHET). Subsequently, 0.25% by weight of silica particles having an average particle size of 1.8 µm were added to the dimethyl terephthalate in the system where the transesterification reaction was completed, and then 0.04% by weight of trimethyl phosphate and antimony trioxide as a stabilizer were respectively added to the dimethyl terephthalate as a stabilizer. Was added to polymerize for 5 hours by a conventional method to obtain a polyethylene terephthalate resin.

(2) film stretching method

The polyethylene terephthalate resin thus obtained was melt-extruded at 290 ° C. and formed into an amorphous sheet having a thickness of 400 μm, followed by stretching 4.0 times in the longitudinal direction of the film at 90 ° C., and stretching 4.0 times in the transverse direction of the film at 120 ° C., then 165. Heat treatment was performed at 3 ° C. for 3 seconds to prepare Film A having a thickness of about 25 μm. The thermal contraction rate of the said film A was 28%.

Manufacturing Method of Film B

Film B was manufactured using the same method as the production method of film A, except that the heat treatment temperature of the film was adjusted to 195 ° C. The thermal contraction rate of the said film B was 15%.

Manufacturing Method of Film C

Film C was produced in the same manner as in the production method of film A, except that the heat treatment temperature of the film was adjusted to 210 ° C. The thermal contraction rate of the said film C was 10%.

Manufacturing Method of Film D

Film D was prepared in the same manner as in the production method of film A, except that the heat treatment temperature of the film was adjusted to 230 ° C. The thermal contraction rate of the said film D was 2%.

Example 1

The film A was used to cover the rod-shaped, U-shaped, and donut-type fluorescent lamps by the tube method shown in FIG. 2, and then heat-treated at 150 ° C. for 30 minutes to prepare a lighting apparatus coated with a heat-shrinkable polyester film.

Example 2

A luminaire coated with a heat shrinkable polyester film was prepared in the same manner as in Example 1 except that film B was used.

Example 3

A luminaire coated with a heat-shrinkable polyester film was prepared in the same manner as in Example 1 except that Film C was used.

Comparative Example 1

The film D was used to wrap the rod-shaped, U-shaped, and donut-shaped fluorescent lamps by heat treatment at 150 ° C. for 30 minutes to prepare a lighting device coated with a heat-shrinkable polyester film.

Comparative Example 2

A luminaire coated with a heat-shrinkable polyester film was prepared in the same manner as in Example 1 except that film D was used.

Table 1 summarizes the evaluation results.

Thermal shrinkage of film Manufacturing Method Job time required Dispersion Assessment (%) Bon Sang U shaped Donut Type Bon Sang U shaped Donut Type Example 1 28% Tube method 0.9 1.1 1.3 7 8 8 Example 1 15% Tube method 1.0 1.2 1.4 7 8 8 Example 1 10% Tube method 1.0 ^* 1.2 1.5 7 8 8 Comparative Example 1 2% Packing 1.0 4.3 8.2 7 34 61 Comparative Example 2 2% Tube method 1.4 2.2 4.8 7 8 8

*: Standard for measuring work time

Examining Table 1, when the heat-shrinkable polyester film is coated on the luminaire by the tube method according to the present invention (Examples 1 to 3), the conventional polyester film is packaged (Comparative Example 1) or the tube method (Comparative) Compared with Example 2), the U-shaped or donut type lighting fixture can be coated with good productivity, and the scattering prevention property is also good.

As described above, the heat-shrinkable polyester film according to the present invention can reliably coat not only rod-shaped but also various kinds of lighting fixtures such as U-shaped or donut-shaped lighting fixtures.

In addition, the coating method of the heat-shrinkable film according to the present invention can easily and reliably coat various kinds of lighting fixtures such as a U-shaped or donut-shaped lighting fixture as well as a rod shape, and thus the coating method according to the present invention. By using this can increase the productivity of the coating process of the safety film even for lighting fixtures of complex shape.

Claims (4)

A biaxially oriented polyester film comprising 0.001 to 30% by weight of an inert lubricant having an average particle diameter of 0.001 to 20 µm and a heat shrinkage at 150 ° C of 10 to 70%. The method of claim 1, wherein the inert lubricant, Calcium carbonate, dolomite, glass spares, glass fibers, talc, kaolin, silica, barium sulfate, aluminum silicate, alumina, titanium dioxide, monovinyl compounds having one aliphatic unsaturated bond in the molecule and at least two aliphatic unsaturated in the molecule Biaxial orientation, characterized in that it comprises at least one selected from the group consisting of a copolymer of a compound having a bond, a thermosetting phenol resin, a thermosetting phenol resin, a thermosetting epoxy resin, a thermosetting urea resin, a benzoguanamine resin, and a fluorine-based fine powder Polyester film. A luminaire comprising 0.001 to 30% by weight of an inert lubricant having an average particle diameter of 0.001 to 20 µm and a biaxially oriented polyester film having a heat shrinkage of 10 to 70% at 150 ° C. Three-dimensionally processing the heat-shrinkable film in accordance with the shape of the luminaire; Inserting the third processed heat-shrinkable film into the luminaire; And And heat-treating the heat-shrinkable film inserted into the luminaire to bring the heat-shrinkable film into close contact with the luminaire.