KR100796006B1 - Electrical equipment protective material and glass manufacturing method using glass fiber - Google Patents

Abstract

An electric apparatus protective material using glass fiber chop and a method for manufacturing the same are provided to facilitate delivery of electric apparatus by allowing manufacturing of electric apparatus with light weight and strong rigidity as like metal and to express various colors. The method for manufacturing an electric apparatus protective material using glass fiber chop includes the steps of: manufacturing the first sheet by mixing and maturing into gel shape unsaturated polyester resin and additives including a hardener, a low shrinking agent, a separating agent, a filler, and a thickener after forming glass fiber chop by cutting glass fiber in a prescribed size(S1); heating and pressurizing multiple the first sheets after laminating them in a mold(S2); and coating the obtained goods with urethane and curing them by heating(S3).

Description

Electrical apparatus protect matrial using glass fiber chop and method

1 is a process chart showing a manufacturing method of an electric device protective material according to the present invention;

Figure 2 is a perspective view showing an example of a transformer case obtained by a method for manufacturing an electrical device protection material according to the present invention,

Figure 3 is a perspective view showing the bottom of the transformer case obtained by the method for manufacturing an electrical device protection material according to the present invention,

4 is a cross-sectional view of an electrical equipment protection material obtained by the method for manufacturing an electrical equipment protection material according to the present invention.

Explanation of symbols on the main parts of the drawings

2: primary sheet 4: secondary sheet

6: urethane coating layer 10: protrusion

The present invention relates to an electrical device protection material and a method for manufacturing the same using glass fiber fins, and more particularly, by mixing glass fiber fins and resins as a transformer case to flatten the glass fibers, and then heating and pressing molding in a predetermined mold. It relates to an electrical equipment protective material and a method of manufacturing the same.

In order to further improve mechanical properties such as strength, rigidity, and heat resistance inherent in the polyamide resin, various fillers are used in the polyamide resin, such as inorganic fibers such as glass fibers and carbon fibers, or inorganic materials such as calcium carbonate, mica, and talc. The compound or layered compounds, such as montmorillonite and swellable fluorine mica, has been mix | blended. However, these methods are effective from the viewpoint of further improving the strength and rigidity of the obtained molded article, but the low affinity between polyamide and filler is a characteristic of polyamide resins.

The drawback was that the toughness was markedly impaired.

On the other hand, Japanese Laid-Open Patent Publication No. 03-217454 has a texture close to ivory.

For the purpose of obtaining a material, a polyamide resin composition comprising 100 parts by weight of polyamide and 5 to 300 parts by weight of apatite is disclosed. However, this composition also has the same strength and rigidity as the composition to which other fillers are added.

Although it is damaged, since the affinity between the polyamide and the apatite interface is very low, the toughness, that is, the decrease in tensile elongation is very large, making it difficult to use in industrial materials.

However, although polyamide resin can improve rigidity and strength without impairing toughness, injection molding for producing various parts in applications to various parts such as automobile parts, electronic and electronic parts, industrial machine parts, etc., Formability such as film molding and blow molding could not be said to be sufficient.

However, in the prior art disclosed in the above-mentioned documents and the like, there is a problem that the production cost is also high because the unit cost of the material itself is high.

The present invention has been made in order to solve the above problems of the prior art, the fiber fabric made by mixing the glass fiber and the resin is multi-layered plain weave in a mold and pressurized, heated to form a glass that is lightweight and has the same rigidity as metal It is an object of the present invention to provide an electric device protective material and a method of manufacturing the same using a fiber shock.

In order to achieve the above object, a method of manufacturing an electric device protective material using glass fiber 따른 according to the present invention is to cut a glass fiber yarn to a certain size to form a glass fiber 후, and then mix an unsaturated polyester resin and an additive gel (Gel). The first step of producing a primary sheet by aging in the form of), the first sheet obtained through the first step is laminated and put into a mold and heated and pressed to form a molded article obtained through the two steps and the urethane coated After the thermal curing is made, including three steps, the additive is characterized in that it comprises a curing agent, a low shrinkage agent, a high temperature curing agent, a release agent, a filler, a thickener.

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In addition, in the manufacturing method of the electrical device protective material using the glass fiber 따른 according to the present invention, the first step is a curing agent corresponding to 0.3% by weight of the glass fiber ,, water storage equivalent to 6% by weight of the glass fiber 촙 Glass fiber mixed with feast 촙 25 ~ 35% by weight of high temperature curing agent, 0.2% by weight of unsaturated polyester resin, release agent of 2% by weight of unsaturated polyester resin, 35.5% by weight of unsaturated polyester resin It is characterized by consisting of 65 to 75% by weight of a mixed unsaturated polyester resin, including a filler corresponding to.

In addition, in the manufacturing method of the electrical device protective material using the glass fiber 따른 according to the present invention, the glass fiber yarn is characterized in that the thickness of 750 ~ 4400 TEX.

In addition, in the manufacturing method of the electric device protective material using the glass fiber 에 according to the present invention, the first step is to pour the gel (Gel) form into a plate-shaped mold and aged for 24 hours while applying heat of 30 ~ 50 ℃ 1 A tea sheet is produced.

In addition, in the manufacturing method of the electric device protective material using the glass fiber 에 according to the present invention, the second step of lamination is the first sheet and the same secondary sheet and the same as the primary sheet is laminated by crossing the horizontal and vertical directions , The ratio of the primary sheet and the secondary sheet to be laminated is characterized in that the choice of 4: 2 or 4: 1 based on the number of sheets (sheet).

In addition, in the method for manufacturing an electric device protective material using a glass fiber glass according to the present invention, the second step is heated to 140 ~ 170 ℃, pressurized at 160 ~ 180 kg / ㎠, characterized in that molded for 20 to 25 minutes do.

In addition, in the manufacturing method of the electric device protective material using the glass fiber 에 according to the present invention, the third step is mixing the urethane and the main hardener in an alternative ratio of 1: 3 to 1: 4 based on the volume ratio (v%). Characterized in that made.

In addition, in the manufacturing method of the electric device protective material using the glass fiber 에 according to the present invention, the third step is characterized in that the first coating and the second coating.

In addition, in the method for manufacturing an electrical device protective material using a glass fiber glass according to the present invention, the three-step thermosetting step is dried for 30 minutes to 1 hour 30 minutes at a temperature of 140 ~ 160 ℃ after the first coating operation, After the second coating operation is characterized in that the drying for 1 hour to 3 hours at a temperature of 170 ~ 190 ℃.

In addition, the electrical device protective material using the glass fiber 재 according to the present invention in order to achieve the above object is characterized in that it is manufactured by the manufacturing method of the electrical device protective material using the glass fiber 같은 as described above.

In addition, the electrical device protective material using the glass fiber 따른 according to the present invention is characterized in that the projection is formed on the upper surface of the electrical device protection material, the bottom is further formed of a honeycomb-shaped projection.

The above and other objects and novel features of the present invention will become more apparent from the description of the specification and the accompanying drawings.

Hereinafter, the structure of this invention is demonstrated according to FIGS.

In addition, in description of this invention, the same code | symbol is attached | subjected to the same part and the repeated description is abbreviate | omitted.

1 is a process chart showing a method of manufacturing an electrical and electronic device protection material according to the present invention, Figure 2 is a perspective view showing an example of a transformer case obtained by the method of manufacturing a transformer case according to the present invention, Figure 3 is a present invention 4 is a perspective view showing a bottom surface of a transformer case obtained by the method of manufacturing a transformer case according to the present invention, and FIG. 4 is a cross-sectional view of the transformer case obtained by the method of manufacturing a transformer case according to the present invention.

As shown in Figure 1, the manufacturing method of the electrical and electronic device protective material according to the present invention by cutting a glass fiber yarn to a certain size to form a glass fiber 촙 and then mixed with an unsaturated polyester resin and an additive (Gel) form Urethane was added to the molded product obtained through the first step (S1) of producing a first sheet by aging with a step, the second step (S2) of laminating the first sheet obtained through the first step, and heating and pressing to form a mold. After the coating is made of three steps (S3) to heat the curing.

Hereinafter, each step will be described in detail.

Stage 1( S1 )

In general, glass fiber (glass-fiber) is a filamentized by melting the glass as a raw material at a high temperature of about 1,600 ℃ and spinning it in water, the type is divided into long fibers and short fibers.

The long fibers in the glass fibers are separated into glass yarns and glass rovings, and the glass yarns are stranded by focusing 50 to 200 pieces of molten glass raw material as a precursor. ), Which is formed by applying twist to it, and glass roving is formed by combining dozens of bones without imparting twist to the focused glass fiber.

Such glass fibers have mechanical, thermal, and chemical properties, including electrical properties. First, the electrical properties are excellent in electrical insulation, the mechanical properties are good in dimensional stability (elongation 3-4%, elastic recovery 100%), Tensile strength and tensile modulus are very good.

In addition, it is non-flammable, lead-free and gas-free, and has excellent heat resistance and fire resistance (heat resistance temperature 300 ~ 550 ℃, softening temperature 840 ℃) and physiologically stable material. Has available chemical properties.

In the first step (S1) of the present invention, the glass fiber yarn is cut to a certain size to form a glass fiber filament, and then, the unsaturated polyester resin and the additive are mixed to produce a primary sheet 2, and this is a gel form. It is the step of ripening.

The glass fiber yarn used in the present invention has a thickness of 750 to 4400 TEX, and finely cuts it in 20 mm to 25 mm units to form a glass fiber filament.

As a more preferred embodiment, glass fiber yarns use 750 TEX, with a cut size of 20 mm.

And the primary sheet 2 is produced by mixing an unsaturated polyester resin and an additive with this glass fiber fiber.

The additive is composed of a curing agent, a low shrinkage agent, a high temperature hardener, a release agent, a filler, a thickener, the hardener and a low shrinkage agent is added to the glass fiber, and the high temperature hardener and the release agent, filler, thickener is added to an unsaturated polyester resin.

As described above, a primary sheet is prepared by mixing an unsaturated polyester resin to which a reinforcing agent, a curing agent, a releasing agent, a filler, and a thickener is added to the glass fiber chopped with the curing agent and the low shrinkage agent.

Unsaturated polyester resin (UPE) is produced in various combinations according to the type of saturated, unsaturated dibasic acid and glycol. Preferably, the viscosity of the resin is low so that the impregnation is good. Should be a resin with no change in viscosity over time.

The reinforcing agent is a variety of types of free spinning roving (粗 紡絲: roing) to suit the required performance, and excellent in formability and workability, low cost fiberglass spinning yarn.

The low shrinkage agent tends to have a large shrinkage due to a curing reaction in the thermosetting resin, and is usually accompanied by a volume shrinkage of 5 to 8%, and this shrinkage causes inaccurate molding and cracking. do.

In order to improve these drawbacks, a low shrinkage agent of thermoplastic resin is added to compensate for shrinkage and surface properties.

The curing agent is used as the organic peroxide, and according to the reaction temperature at which the peroxide is dissolved, it is classified into a medium temperature hardener, a high temperature hardener, etc. In the present invention, TBPB (Tertiary Butyl PeroxyBenzoate) activated at around 140 ℃ is used, and preferably stored It is selected in consideration of stability, fluidity, reactivity, appearance and gloss, curing efficiency, and physical properties in the mold.

The filler is mainly used calcium carbonate, sodium hydroxide, low specific gravity minerals, and the most commonly used is calcium carbonate.

The thickener is added to improve the bonding strength with the glass fiber.

Poor impregnation, lack of flow or overflow have a large effect on the thickening behavior of the resin, which can be controlled by the balance of the carboxyl and hydroxyl groups attached to the resin ends and the molecular weight distribution.

When mixed with the resin compound, the viscosity must be low to impregnate the glass fiber, and the filler and the glass fiber can be added a lot, and the breakage of the glass fiber is reduced, but once the glass fiber is impregnated, the high viscosity must be maintained. When forming, the glass fiber is less separated from the resin compound, and shrinkage is reduced, so that a good surface product can be obtained.

The release agent is melted in the compound before being cured by the heat of the mold to move to the mold surface to form a release layer to prevent the material from adhering to the mold.

In one embodiment of the mixing ratio of these compositions, 25-35% by weight of a glass fiber 촙 25-35% by weight containing a curing agent corresponding to 0.3% by weight of glass fiber 저, a low shrinkage agent corresponding to 6% by weight of glass fiber 촙 and unsaturated Unsaturated polyester resin 65 to 75 mixed with high temperature curing agent corresponding to 0.2% by weight of polyester resin, release agent corresponding to 2% by weight of unsaturated polyester resin, and filler corresponding to 35.5% by weight of unsaturated polyester resin Mix by weight.

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The composition obtained by the above-mentioned process is poured into a plate-shaped mold, aged for 24 hours while being heated at 30 to 50 ° C., and then separated from the mold to obtain a plate-shaped primary sheet having a predetermined thickness.

2 steps ( S2 )

The primary sheet 2 obtained through the first step (S1) is laminated and placed in a mold (not shown) to be heated and pressurized.

In consideration of the elongation at the time of pressurization of the primary sheet 2, for example, to manufacture a transformer case of 1 × 1 m 2 is preferably set to 900 × 900 mm 2.

The primary sheet 2 to be laminated and the secondary sheet 4 manufactured in the same manner as the primary sheet are laminated by crossing each other in the horizontal and vertical directions, and the primary sheet 2 and the secondary sheet 4 which are stacked. The crossover ratio is set to 4: 2 or 4: 1 based on the number of sheets.

That is, after arranging four primary sheets 2 horizontally, the secondary sheets 4 manufactured in the same manner as the primary sheets are vertically intersected, or four primary sheets 2 are arranged. After arranging horizontally, one sheet of secondary sheet 4 is vertically cross-arranged thereon, and the arrangement direction of the stack of the primary sheet 2 and the secondary sheet 4 may be reversed.

In addition, the above-described stacking of the primary sheet 2 and the secondary sheet 4 is 4: 2 or 4: 1 based on the number of sheets, and repeatedly stacked until a predetermined thickness is obtained.

Thereafter, the conditions in the mold (not shown) are heated to 140 to 170 ° C., pressurized to 160 to 180 kg / cm 2, and molded for about 20 to 25 minutes.

In a more preferred embodiment of the present invention, the temperature in the mold (not shown) was heated to 160 ° C., pressurized to 170 kg / cm 2, and molded for 20 minutes.

On the other hand, the mold (not shown) is to be manufactured so as to mold the transformer case for the purpose of the present invention, a plurality of storm drain holes to facilitate the inflow of stormwater to be formed after the mold work should be formed will be.

In addition, pigments of various colors may be further added to the primary and secondary sheets 2 and 4 obtained through the above-described first step S1 to express a specific color and design.

Three phases ( S3 )

This three step (S3) is a step of thermosetting after coating the urethane to the molding obtained through the above-mentioned two step (S2).

That is, the urethane coating layer 6 is formed by spraying urethane onto the molded product obtained through the second step (S2). At this time, the urethane used in the coating is mixed with the main curing agent, the mixing ratio of 1: 3 to 1: 4 based on the volume ratio (v%).

The coating of urethane is carried out twice in the first and second stages. After the first coating is completed and heat cured for a predetermined time, the second coating is performed to perform heat curing.

After the first coating operation is dried for about 30 minutes to 1 hour 30 minutes at a temperature of 140 ~ 160 ℃.

A more accurate embodiment of the present invention was dried for 1 hour at a temperature of 150 ℃ after the first coating operation.

Thereafter, after performing the secondary coating operation, the thermosetting process is completed by drying at a temperature of about 170 to 190 ° C. for 1 hour to 3 hours.

More preferred embodiment of the present invention was dried for 2 hours at a temperature of 180 ℃ after the secondary coating operation.

Then, by cutting the molding obtained through the three steps (S3) to the appropriate size to complete the transformer case (A) of the present invention.

2 to 4, in the transformer case A according to the present invention, a primary sheet 2 made of glass fiber and an unsaturated polyester resin is formed at an inner lower portion thereof, and the above-described secondary is formed thereon. The sheet 4 is formed, the urethane coating layer 6 is formed on the outer surface.

The transformer case (A) may be formed with a discharge hole (not shown) for drainage, the upper surface is formed with a projection 10 for preventing slipping, the bottom surface is a honeycomb-shaped projection for reinforcing strength ( Also known as honeycomb structure) 20 is further formed.

As mentioned above, although the invention made by this inventor was demonstrated concretely according to the said Example, this invention is not limited to the said Example and can be variously changed in the range which does not deviate from the summary.

That is, in the above embodiment, a transformer case is described as an example of an electric device protective material using glass fiber and a method of manufacturing the same, but the present invention is not limited thereto, and of course, the present invention can be applied to cases of various electric devices.

As described above, according to the electrical device protective material and the manufacturing method using the glass fiber 에 according to the present invention, it is possible to manufacture an electrical device case having a lightweight and rigidity, such as metal, it is easy to transport, can express a variety of colors There is an advantage that can improve the aesthetics of the city.

Claims (12)

After cutting the glass fiber to a certain size to form a glass fiber 촙 1 step of producing a primary sheet by mixing the unsaturated polyester resin and additives to mature in a gel (Gel) form, Step 2 of laminating the primary sheet obtained through the first step into a mold and heated, pressurized and After the urethane is coated on the molding obtained through the two steps, and comprises three steps of heat curing, The additive is a manufacturing method of the electric device protective material using a glass fiber 촙 comprising a curing agent, a low shrinkage agent, a high-temperature curing agent, a release agent, a filler, a thickener. delete The method of claim 1, The first step includes a curing agent corresponding to 0.3% by weight of glass fiber ,, a low shrinkage agent corresponding to 6% by weight of glass fiber 혼합, and mixing 25 to 35% by weight of glass fiber 촙 and 0.2% by weight of unsaturated polyester resin. It consists of a mixture of 65 to 75% by weight of the mixed unsaturated polyester resin, including a high-temperature curing agent, a release agent corresponding to 2% by weight of the unsaturated polyester resin, and a filler corresponding to 35.5% by weight of the unsaturated polyester resin Method for producing an electrical equipment protective material using a glass fiber 으로 characterized in that. The method of claim 3, The fiberglass yarn is a thickness of 750 ~ 4400 TEX manufacturing method of the electric device protective material using a glass fiber 촙, characterized in that. The method of claim 4, wherein The first step is to pour the gel (gel) form into a plate-shaped mold and aging for 24 hours while applying a heat of 30 ~ 50 ℃ to prepare a primary sheet to produce an electrical equipment protective material using a glass fiber 촙 Way. The method of claim 5, In the lamination in the second step, the primary sheet and the secondary sheet identical to the primary sheet are laminated by crossing the horizontal and vertical directions, and the ratio of the laminated primary sheet and the secondary sheet is the number of sheets. 4: 2 or 4: 1 on the basis of the manufacturing method of the electrical equipment protective material using a glass fiber 촙 characterized in that the alternative. The method of claim 6, The second step is heated to 140 to 170 ℃, pressurized at 160 to 180 kg / ㎠, molded for 20 to 25 minutes, characterized in that the manufacturing method of the electric device protective material using a glass fiber 촙. The method of claim 7, wherein The third step is a method for producing an electric device protective material using a glass fiber 촙, characterized in that the urethane and the main hardener is mixed in an alternative ratio of 1: 3 to 1: 4 based on the volume ratio (v%). The method of claim 8, The third step is a method of manufacturing an electric device protective material using a glass fiber 하는, characterized in that the first coating and the second coating operation. The method of claim 9, The three-step thermosetting process is dried for 30 minutes to 1 hour 30 minutes at a temperature of 140 ~ 160 ℃ after the first coating work, and dried for 1 hour to 3 hours at a temperature of 170 ~ 190 ℃ after the second coating work Method for producing an electrical equipment protective material using a glass fiber 촙, characterized in that. An electrical equipment protective material produced by a method for producing an electrical equipment protective material using the glass fiber 기재된 of any one of claims 4 to 10. The method of claim 11, Protrusions are formed on the upper surface of the electrical device protection material, electrical equipment protection material, characterized in that the bottom is further formed of a honeycomb-shaped projection.

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