KR20080076884A - Upper board for experiment stand - Google Patents

Abstract

An upper board inserted with black and white chips for an experiment stand is provided to secure high corrosion resistance and high chemical resistance and to make the appearance beautiful by adding black and white chips to resin liquid. An upper board(10) inserted with black and white chips for an experiment stand is composed of: a lower resin layer(400) formed at the lower end by using phenol resin; a silica layer(300) formed at the upper end of the lower resin layer by using silica and a hardening agent; an upper resin layer(200) applied on the upper and lateral ends of the silica layer; and a surface resin layer(100) applied on the upper and lower sides and the left and right sides of the upper resin layer. The lower resin layer is formed by mixing black carbon of 0.52g and fine powder of 1.08kg per phenol resin of 1kg. The silica layer is formed by mixing silica of 0.39kg and a hardening agent of 0.4g per phenol resin of 1kg. The upper resin layer is formed by mixing black carbon of 0.48g and fine powder of 1.44kg per phenol resin of 1kg. The surface resin layer is formed by mixing a white thinner of 60g, white chips of 120g, black chips of 20g, a black thinner of 0.2g, silica of 10g, a hardening agent of 15g, an accelerating agent of 5g, and gel coat of 0.5g per phenol resin of 1kg. Phenol resin used for the surface resin layer consists of different components of phenol resin used for the upper and lower resin layers.

Description

Test board with black and white chips inserted {UPPER BOARD FOR EXPERIMENT STAND}

The present invention relates to a test target plate into which a black chip and a white chip are inserted. More specifically, the upper plate of a test bench installed in a laboratory such as a laboratory has higher chemical and chemical resistance as well as white and black chips. It is also about the top of the bench, which is excellent in design.

In general, the experimental table is used when conducting experiments in research institutes and various technical fields, and is a table having strong corrosion resistance, chemical resistance, and chemical resistance even if strong chemicals are used.

The conventional test target plate is an extruded flat plate of phenolic resin, bonded to the plywood by a bond, and the deformation caused by the temperature change is good, and the corrosion resistance is weak as well as a problem that is not strong.

In order to solve the above problems, recently, a test target plate has been developed in which a surface is formed of a phenolic resin and filled with silica sand and a binder therein.

However, the conventional top plate is formed mostly in black to increase the corrosion resistance and chemical resistance, which has a problem such as blurring the atmosphere of the laboratory, the top plate formed in white has a weak chemical resistance.

In order to achieve the above object, the present invention is a bottom resin layer formed of a phenolic resin at the bottom; A silica sand layer formed of silica sand and a binder at an upper end of the lower resin layer; An upper resin layer applied to upper and side ends of the silica sand layer; Consists of the surface resin layer applied to the top and bottom and left and right of the upper resin layer,

The lower resin layer is formed by mixing 0.52 g of black carbon and 1.08 kg of fine powder per 1 kg of phenolic resin, and the silica sand layer is formed by mixing 0.39 kg of silica sand and 0.4 g of hardener per 1 kg of phenolic resin, and the upper resin layer 0.48 g of black carbon and 1.44 kg of fine powder per 1 kg of silver phenolic resin are mixed, and the surface resin layer comprises 60 g of colorant (white), 120 g of white chip, 20 g of black chip, and 0.2 g of colorant (black) per 1 kg of phenolic resin. , 10 g of silica, 15 g of curing agent, 5 g of accelerator, and 0.5 g of gel coat.

As described above, according to the structure of the test target plate into which the black chip and the white chip according to the present invention are inserted, the following effects occur.

(1) Excellent corrosion resistance and chemical resistance.

(2) The appearance is beautiful by containing white and black chips in the resin.

The present invention is a bottom resin layer 400 formed of a phenolic resin at the bottom; A silica sand layer 300 formed of silica sand and a hardener to an upper end of the lower resin layer 400; An upper resin layer 200 applied to upper and side ends of the silica sand layer 300; Consists of the surface resin layer 100 is applied to the top and bottom and left and right of the upper resin layer 200,

The lower resin layer 400 is formed by mixing 0.52 g of black carbon and 1.08 kg of fine powder per 1 kg of phenolic resin, and the silica sand layer 300 comprises 0.39 kg of silica sand and 0.4 g of hardener per 1 kg of phenolic resin. The upper resin layer 200 is composed of 0.48 g of black carbon and 1.44 kg of fine powder per 1 kg of phenolic resin, and the surface resin layer 100 is 60 g of a colorant (white) per 1 kg of phenolic resin and white chip. 120 g, black chip 20 g, colorant (black) 0.2 g, silica 10 g, curing agent 15 g, accelerator 5 g, gel coat 0.5 g.

The fine powder is a stone powder pulverized to 200 mesh or less in general, in the present invention was used to crush feldspar, it can be easily obtained in the above terms in the art.

The white chip or the black chip is a pulverized synthetic resin material, that is, a plastic having a high melting point, and in the present invention, a chip formed of an unsaturated polyester resin (UP resin) is used.

The phenolic resin used for the surface layer 100 uses Sewon Hwaseong Product No. 1051, and the upper and lower resin layers 200,400 use Sewon Hwaseong Co., Ltd. No. 841 to configure chemical characteristics differently. .

In the method for producing a test target plate in which the black and white chips of the present invention are inserted, after preparing a mold with an open top, mixing 1 kg of resin solution per 1 square meter, 60 g of a colorant (white), 120 g of white chips, and 20 g of black chips Step 1 is applied to the bottom and side of the frame;

After the first step, applying a mixed solution of 0.2 g of a colorant (black), 10 g of silica, 15 g of a curing agent, 5 g of an accelerator, and 0.5 g of a gel coat to the bottom and side of the mold;

After step 2 and after 1 hour to 2 hours at room temperature three steps of applying a mixed solution of 2.5kg of resin solution per square, 1.2kg of black carbon and 3.6kg of fine powder to the bottom surface;

4 steps of filling the inside of the mold with a mixed solution of 5 kg of phenolic resin, 1.95 kg of silica sand and 20 g of a curing agent after 20 minutes to 30 minutes after the three steps;

1 to 2 hours after the step 4 and 5 steps of applying a mixture of a mixture of 2.5kg phenolic resin, 1.3kg black carbon, 2.7kg fine powder per 1 square meter on top of the silica sand layer of step 4;

After 5 to 20 minutes after the step 5 consists of six steps to remove the frame and turn over.

The frame is formed in a rectangular frame with a desired thickness of the test plate and opened at the top.

The production method of the test target plate inserted into the black and white chip of the present invention is a method of producing the surface resin layer upside down from the surface resin layer 100 is composed of the upper and side surfaces of the test target plate, and the silica sand layer ( 300 to produce the upper and lower resin layers (200, 400) to form.

Hereinafter, the present invention will be described based on the results commissioned by the Korea Testing Institute and the Korea Living Environment Testing Institute to test the corrosion resistance and chemical resistance of the test target plate 10 formed as a preferred embodiment of the present invention. .

Table 1 and Table 2 are the test report obtained by requesting the chemical resistance of the test subject plate 10 of the present invention to the Korea Testing and Research Institute and the Korea Living Environment Testing Institute.

Table 1

Test Items unit Sample classification Result Test Methods Chemical resistance (75% H₂SO₄) - clear Client provided (*) Chemical resistance (20% HCL) - clear Client provided (*) Chemical resistance (25% NaOH) - clear Client provided (*)

※ Test method: Significant melting and swelling of expression after standing for 8 hours at room temperature

[Table 2]

Test Items unit Test result      Chemical Resistance -Appearance Ammonia water (30%)      - No noticeable color, gloss and swelling Potassium chloride (95%) No noticeable color, gloss and swelling Dichromate (Potassium dicholmate) (90%) No noticeable color, gloss and swelling Sodium chloride (30%) No noticeable color, gloss and swelling Potassium hydroxide (50%) No noticeable color, gloss and swelling Ethanol (95%) No noticeable color, gloss and swelling Carbon tetrachloride (100%) No noticeable color, gloss and swelling Chlorobenzen (100%) No noticeable color, gloss and swelling Toluene (100%) No noticeable color, gloss and swelling Benzene (100%) No noticeable color, gloss and swelling Acetic acid (75%) No noticeable color, gloss and swelling Perchloric acid (30%) No noticeable color, gloss and swelling Test Methods According to KS M 3802-2003

As described above, as a result of the chemical resistance test on the test target plate 10 of the present invention, it can be seen that there are no corrosion or changes in many chemicals.

Although the present invention has been described with reference to the accompanying drawings, it will be apparent to those skilled in the art that various modifications may be made therein without departing from the scope of the invention, which is covered by the following claims.

1 is a cross-sectional view of the test plate formed of a preferred embodiment of the present invention.

** <Description of the symbols for the main parts of the drawings> **

10: test plate 100: surface resin layer

200: upper resin layer 300: silica sand layer

400: bottom resin layer

Claims (3)

In the general test plate, A bottom resin layer 400 formed of a phenolic resin at a bottom thereof; A silica sand layer 300 formed of silica sand and a hardener to an upper end of the lower resin layer 400; An upper resin layer 200 applied to upper and side ends of the silica sand layer 300; Consists of the surface resin layer 100 is applied to the top and bottom and left and right of the upper resin layer 200, The lower resin layer 400 is formed by mixing 0.52 g of black carbon and 1.08 kg of fine powder per 1 kg of phenolic resin, and the silica sand layer 300 comprises 0.39 kg of silica sand and 0.4 g of hardener per 1 kg of phenolic resin. The upper resin layer 200 is composed of 0.48 g of black carbon and 1.44 kg of fine powder per 1 kg of phenolic resin, and the surface resin layer 100 is 60 g of a colorant (white) per 1 kg of phenolic resin and white chip. Experimental board inserted black chip and white chip, characterized in that composed of 120g, black chip 20g, colorant (black) 0.2g, silica 10g, curing agent 15g, accelerator 5g, gel coat 0.5g. The method of claim 1, The phenolic resin used in the surface resin layer 100 and the phenolic resin used in the upper and lower resin layers and the lower resin layer are black and white chips. Preparing a mold with an open top, mixing 1 kg of resin solution per 1 square meter, 60 g of a colorant (white), 120 g of white chips, and 20 g of black chips, and then applying it to the bottom and side of the mold; After the first step, applying a mixed solution of 0.2 g of a colorant (black), 10 g of silica, 15 g of a curing agent, 5 g of an accelerator, and 0.5 g of a gel coat to the bottom and side of the mold; After step 2 and after 1 hour to 2 hours at room temperature three steps of applying a mixed solution of 2.5kg of resin solution per square, 1.2kg of black carbon and 3.6kg of fine powder to the bottom surface; 4 steps of filling the inside of the mold with a mixed solution of 5 kg of phenolic resin, 1.95 kg of silica sand and 20 g of a curing agent after 20 minutes to 30 minutes after the three steps; 1 to 2 hours after the step 4 and 5 steps of applying a mixture of a mixture of 2.5kg phenolic resin, 1.3kg black carbon, 2.7kg fine powder per 1 square meter on top of the silica sand layer of step 4; Method of manufacturing a test target plate inserted with a black chip and a white chip, characterized in that consisting of six steps to remove the frame after 20 to 30 minutes after the step 5 to turn over.

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