KR100273511B1 - Processing method for polyester films - Google Patents

Abstract

The present invention relates to a method of manufacturing a polyester film to make a fuse by depositing lead in a tens of nm units on the polyester film in order to block overcurrent of an electric product using an ultra-precision current, a conventional lead or lead alloy vacuum tube It is impossible to manufacture the fuse on the order of several tens of nm, even if manufactured, there was a problem that often breaks during the process or during transportation of the finished product even if manufactured.

According to the present invention, lead is deposited on a polyester film having a repeating unit of ethylene terephthalate or ethylene naphthalate with a thickness deviation of 0.02% or less, and lead is deposited at a thickness of 5 to 50 nm on both sides of the film, so that the current is conducted at a high frequency of micro frequency. Lead is deposited on a polyester film having a repeating unit of ethylene terephthalate or ethylene naphthalate. It is 10-20nm, thickness deviation is 0.02% or less, and it is made of polyester film manufacturing method to improve the winding workability by applying silicon-based hard coating on the opposite side of deposition.

Description

Processing method for polyester films

The present invention relates to a method for producing a polyester film, and more particularly, in the water on the both sides of the polyester film to block the over-current of the electrical product using a high-precision current by using the melting point of the polyester at a specific temperature The present invention relates to a method for manufacturing a polyester film which can be used as a fuse by depositing lead in several tens of nm, or by applying a silicon-based hard coating on the opposite side of lead deposition.

Saturated linear polyester film represented by polyethylene terephthalate has excellent mechanical properties, heat resistance, weather resistance, electrical insulation, chemical resistance, etc., so it is widely used in the field of packaging, photography, capacitor, electrical insulation , magnetic tape, etc. .

In general, the fuse inserts lead or lead alloy into a vacuum tube and inserts it into the anode of the electrode. When overcurrent flows, resistance heat is generated inside the lead, melted and broken, thereby blocking the flow of electricity to prevent accidents such as fire caused by electrical products. Role.

However, it is impossible to manufacture these fuses in units of several tens of nm, and even if manufactured, there is a problem in that they are often broken during the process or during transportation of the finished product.

In addition, when a current is sent to the conductor lead, a magnetic field is generated inside the conductor. In this case, when the current increases, the induced current inside the conductor causes a skin effect phenomenon that flows only around the periphery. This phenomenon is more severe at higher frequencies, and only a very thin portion of the surroundings passes through the microwave. This fuse has a large thickness variation compared to that of the film. There was a drawback that the generated it becomes a defect and the life is shortened.

The present invention has the purpose of increasing the winding work by depositing lead on both sides of the film to uniform the heat of resistance inside and outside when current flows, depositing lead on a polyester film and hard coating on the opposite side.

Therefore, in one embodiment of the present invention, the lead film is deposited on both sides of the film with a uniform thickness of 5 to 50 nm in PET film to prepare a polyester film to produce a fuse having an even heat resistance inside and outside of the fuse. Explain how ,

According to another embodiment of the present invention, lead is deposited on one side with a uniform thickness of 10 to 90 nm on a PET film and a silicon-based hard coating on the opposite side of the deposition enables overcurrent control of an electric product using a very small current. In addition, the manufacturing method of the polyester film which can improve the winding workability of a film is demonstrated.

Referring to the configuration and operation of the present invention in detail based on the drawings as follows.

In an embodiment of the present invention, the thickness variation of the polyether resin having repeating units of ethylene terephthalate or ethylene naphthalate is 0.02% or less, and a lead deposition layer having a thickness of 5 to 50 nm is formed on both sides of the polyester resin. It is made of a method for producing a polyester film.

Another embodiment of the present invention is a polyester film for depositing 10 to 90 nm of lead on a film having a surface roughness Ra value of 3 nm or less and a thickness deviation of 0.02% or less, and applying a silicon-based hard coating on the opposite side of the lead deposition surface. It is made of a manufacturing method.

Hereinafter, the present invention will be described in more detail.

The present invention is not only easy to manufacture a thin line in the unit of several tens of nm, but even if it is manufactured, since the breakage of the fuse is caused by external impacts in the process and the transport phase , the support is made of a film and the process and transport are performed. It is to solve the problems that occur in the.

In addition, when a current flows through a conductor, a magnetic field is generated in the conductor. The magnetic field is pushed from the center to the outside, and most of the current flows on the surface. This is especially true in lead wires that use high frequency electrical appliances. In particular, this phenomenon leads to a difference in resistance between the inside and the outside of the wire, so that the heat of resistance is high and the inside is low, so that the prediction of the melting current is unstable. This is a problem for electrical appliances that use high frequency fuses.

In order to solve this problem, lead deposition is performed on both sides of a thin film with a thickness of 5 to 50 nm to make the current density flowing from the center of lead to the surface constant. Of course, it is almost impossible to directly measure the current density according to thickness at several tens of nm in thickness, but indirectly, one layer of lead-deposited polyester film fuse composed of one layer and the sum of the thickness of both sides is formed of one layer. As a result of comparing the melting temperature by giving a constant microwave current to the fuse of the polyester film deposited on both sides, such as melting temperature and current having a low frequency, the film deposited on one side is more frequency than the film deposited on both sides. It was shown that the difference in melting temperature with was greater.

Therefore, in the present invention, lead was deposited on both sides of the film at 5 to 50 nm in order to reduce the difference in resistance heat inside the lead wire (fuse) having a surface roughness of 2 nm or less.

Although the lead deposition method can be deposited by physical precipitation or plating such as vacuum deposition or sputtering, in the present invention, the deposition is performed on both sides or one end surface of the film by a known vacuum deposition method.

In addition, in another embodiment of the present invention to produce a fuse with ultra-thin lead deposition that can be used in the fuse of ultra-current to withstand physical impact by vacuum deposition of lead to 10 to 90 nm on the surface roughness 3nm or less In order to wound up the film, a silicone-based hard coating was applied on the opposite side of the deposition surface.

Examples of silicon-based hard coatings include dip coating, spray coating, flow coating, and the like, and the coating method is selected by the shape, size, use, etc. of the substrate, but the present invention is spray coating.

This coating method was to cure according to the simple dehydration side reaction of silanol, followed by spray coating, followed by drying (3350% RH) followed by heat curing (120 ° C).

In order to further enhance the effects of the present invention and to improve affinity with the polymer, the surface treatment may be performed with a known surface treatment agent.

There is no restriction | limiting in particular in the transesterification reaction of the polyester manufacturing method in this invention in the transesterification reaction, Any conventionally well-known thing may be used. For example, any of alkaline earth metal compounds such as magnesium compounds, zirconium compounds, sodium compounds, potassium compounds and strontium compounds, and cobalt compounds, zinc compounds and manganese compounds may be selected as soluble in the reaction system. The polymerization catalyst is not particularly limited, but may be appropriately selected from antimony compounds, germanium compounds and titanium compounds. In addition, in order to adjust the running and winding properties of the film, insoluble inorganic particles or organic particles may be appropriately selected and added to the polyester. For example, as inorganic particles insoluble in polyester, any known particles such as calcium carbonate, fluorite, glass spare, fiber glass, talc, mica, silica, barium sulfate, aluminum silicate, alumina, titanium dioxide, etc. may be used. It's okay.

In addition, organic particles insoluble in polyester include 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 with a crosslinking agent, a thermosetting epoxy resin, a thermosetting urea resin, and benzo Fine powders of guanine resins and fluorine-based resins may be used, and there are no particular limitations on the type and amount of these, and two or more kinds of the particles may be mixed and used. And it is preferable to add the said particle | grains at arbitrary time points before the polymerization reaction is complete | finished.

The produced sheet is subjected to a longitudinal stretching process, but any one-step or multi-step stretching method may be used. In-line coating may be performed between the longitudinal stretching and the transverse stretching to improve the deposition property of the film, and the corona treatment may be performed after the transverse stretching.

The present invention will be described in more detail with reference to examples. However, the scope of the present invention is not limited only to the following examples.

The measuring method used in one embodiment of the present invention is as follows.

1-1) Resistance Heat Measurement

The temperature difference is obtained by measuring the resistance heat at each frequency of fuse made by depositing 20nm on one side and 10nm on both sides by applying different frequency of current to fuse in vacuum oven.

It can be determined that the higher the temperature difference for each frequency of the resistor string, the more the resistor strings inside and outside are different.

◎: temperature difference is less than 0.1 ℃

△: temperature difference is less than 1 ℃ at 0.1 ℃ or more

×: temperature difference is more than 1 ℃

1-2) Destructive test by impact strength of fuse

Ten fuses deposited on both sides of the lead itself and 10 fuses deposited on both sides without deposition are counted by applying a force of 0.25 N for 60 minutes per minute for 10 minutes.

The quality is indicated by three grades.

◎: 0-1

△: 1-2

×: 3 or more

1-3) Comprehensive Evaluation

As a result of comprehensively evaluating various physical properties of the polyester film measured according to the above-mentioned method, it was indicated by the following four grades.

◎ very good

O: Good

△: normal

×: defective

(Example I)

100 parts of dimethyl terephthalate, 70 parts of ethylene glycol and 0.05 part of calcium acetate were added to the reactor, and transesterification was carried out for 4 hours. Reaction species, 0.06 part of trimethyl phosphate and 0.04 part of antimony trioxide were added to the said reactor, and it superposed | polymerized by the conventional method for 5 hours, and obtained polyester. Next, after the lead was deposited on both sides of the film with a thickness of 10 nm, the fuse film was manufactured to a standard having a length of 20 nm, a width of 1 mm, and a thickness of 4 μm.

As a result of the analysis of the fuse film, as shown in Table 1, the thermal resistance and the fracture resistance by the impact strength were excellent.

Comparative Example I

To test the impact, only 2μm thick, 13μm wide, and 20mm long fuses were manufactured. To test the difference in resistance heat, fuses of 10 nm thickness were deposited on both sides of a 20 mm, 1mm wide, and 4μm thick film. Made. The analysis results are shown in Table 1.

Repeat count Resistance heat deviation Fracture test by impact strength Comprehensive Evaluation Example I One ◎ ◎ ◎ 2 ◎ ◎ ◎ 3 ◎ △ O 4 ◎ ◎ ◎ 5 ◎ ◎ ◎ Comparative Example II One △ × × 2 × △ × 3 △ △ △ 4 × × △ 5 × △ ×

The measurement method used in another embodiment of the present invention is as follows.

2-1) thickness deviation

Using a thickness profiler (WMV), the sensor converts the change in capacitance according to the change in thickness of the film into a sensed thickness to obtain a thickness deviation.

2-2) Resistance heat measurement

In a vacuum oven, apply a voltage and a current to the fuse and measure the resistance heat of 20 parts to find the temperature deviation.

The greater the temperature difference in the heat of resistance, the more there are bonding sites.

2-2) Fracture test by impact strength of fuse

Ten fuses are applied by applying 0.25 N of force 60 times per minute for 10 minutes to compare the number of fuses destroyed. The quality is indicated by three grades.

◎: 0-1

△: 1-2

×: 3 or more

1-3) Comprehensive Evaluation

The result of comprehensively evaluating the various physical properties of the polyester film measured according to the above-mentioned method was expressed by the following four grades.

◎ very good

O: Good

△: normal

×: defective

(Example II)

100 parts of dimethyl terephthalate, 70 parts of ethylene glycol, and 0.05 parts of calcium acetate were added to the reactor to carry out transesterification for 4 hours. After the completion of the reaction, 0.06 part of trimethyl phosphate and 0.04 part of antimony trioxide were added to the reaction path, and polymerization was carried out by a conventional method for 5 hours to obtain a polyester. Next, after the lead was deposited with a thickness of 20 nm, the fuse film was manufactured to a standard having a length of 20 nm, a width of 1 mm, and a thickness of 4 μm. And a silicon-based coating on the opposite side of the deposition.

As a result of the analysis of the fuse film, as shown in Table 2, the fracture resistance was excellent due to the thickness deviation, resistance thermal stability, and impact strength.

Comparative Example II

Table 2 shows the results of a fuse having a thickness of 20 mm having a thickness of 13 µm and a thickness of 2 µm using only lead.

Repeat count Thickness deviation Resistance heat deviation Fracture test by impact strength Comprehensive Evaluation Example I One 1.013 0.03 ◎ O 2 0.01 0.03 ◎ ◎ 3 0.013 0.02 ◎ ◎ 4 0.007 0.05 ◎ ◎ 5 0.012 0.02 ◎ ◎ Comparative Example II One 0.07 0.08 × × 2 0.05 0.05 × △ 3 0.08 0.06 △ × 4 0.06 0.07 × △ 5 0.07 0.05 △ ×

As described above, the present invention has a surface roughness, a Ra value of 2 nm or less, and a thickness variation of 0.02% or less. Reducing the temperature difference of resistance and reducing the thickness variation very much gives uniformity of product quality, or 10 to 90 nm of lead on both sides of film with surface roughness, Ra value of 3 nm or less and thickness variation of 0.02% or less After the deposition, the fuse is manufactured and the silicon-based hard coating is applied to the opposite side of the deposition surface to improve the winding of the film to make the support with the film, which has the advantage of solving the problem of the impact generated in the manufacturing process and the transport phase.

Claims (2)

(Correction) Microwaves having a high frequency by vacuum deposition of lead with a thickness of 5 to 50 nm on a polyester film having a repeating unit of ethylene terephthalate or ethylene naphthalate and a thickness of 5 to 50 nm on both sides of the film. A method for producing a polyester film in which resistance heat inside and outside of a fuse is constant by removing a skin phenomenon in which current flows only through a wire at a frequency. (Correction) The process according to claim 1, wherein lead is vacuum deposited on a polyester film having repeating units of ethylene terephthalate or ethylene naphthalate, having a thickness of 10 to 20 nm and a thickness deviation of 0.02% or less, A method of manufacturing a polyester film which can be coated with a silicon-based hard coating by a conventional spray coating method to increase winding workability.