KR20190042937A - Tray for reagent depository - Google Patents

Abstract

The present invention is a reagent storage tray detachably installed in a tray slot of a reagent storage main body, wherein a coating layer is formed on a surface of the reagent storage tray by a coating composition and the coating composition contains a polyamide resin, a spherical bead, and glass fibers. The reagent storage tray of the present invention has improved chemical resistance, abrasion resistance, and durability, thereby being able to provide the reagent storage tray with no deformation, breakage, or abrasion due to long-term use.

Description

The reagent tray. {TRAY FOR REAGENT DEPOSITORY}

The present invention relates to a reagent tray, and more particularly, to a reagent tray for improving chemical resistance, scratch resistance, and durability in a plastic tray for replacing a conventional steel reagent tray.

In order to store a reagent or a chemical, a reagent used in a laboratory such as a school or a laboratory generally has a main body made of a metal material and a tray slot at a predetermined interval inside the main body so that a plurality of trays can be detachably mounted Structure.

Since various reagents and chemicals stored in these reagents generate acid or organic gas, they cause corrosion of the metal body or trays constituting the reagent pot, so they are difficult to manage. Recently, they have been made of plastic material, Respectively.

As an example of such an example, the main body of the reagent box, the shelf, and the horizontal and vertical partition plates are made of polyethylene or polyvinyl chloride, which is a thermoplastic resin, and chemical resistance is given in the Korean Utility Model Application Publication No. 20-0385424.

In addition, Korean Utility Model Publication No. 20-0400126 discloses that a thin polypropylene resin is attached to the steel plate wall of the reagent plant and the surface of the basket drawer to prevent corrosion.

In addition, Korean Patent Publication No. 10-1720118 employs a particle board coated with phenol resin as a plate shelf of a reagent to improve heat resistance, chemical resistance and dimensional stability.

However, the shelves or trays of the reagents are often detached or attached to adjust the gap or accommodate them according to the size or type of reagent bottle to be stored. In this case, the plastic material is different from the metal by the abrasion of the slot formed in the wall of the body There is a problem that the durability is greatly reduced. In addition, when the resin is coated on the surface, such a coating layer may be damaged by long-term use, resulting in a problem that the chemical resistance is lowered.

Korean Patent Laid-Open Publication No. 10-2017-0029735 discloses that a fixing member made of a synthetic resin material is mounted on the bottom surface of the upper member and the upper surface of the lower member so that the tray can be seated in the tray slot in the detachable reagent tray.

Also in this case, since the fixing member is likely to be abraded or damaged by detachment of the tray, there is a problem in long-term use. Particularly, inside the reagent body, chemical resistance can be imparted by attaching a resin thin film to a surface of a metal material or by forming a main body from a wood material capable of coating a resin coating composition. However, The metal is exposed on the surface due to abrasion and the chemical resistance is lowered. Even if the entire tray is molded by plastic resin, deformation and wear due to long-term use can not be prevented.

Korean Utility Model Registration No. 20-0385424 Korea Registered Utility Model Bulletin 20-0400126 Korean Patent Publication No. 10-1720118 Korean Patent Publication No. 10-2017-0029735

Disclosure of the Invention The present invention has been made in view of the problems of the prior art as described above, and provides a reagent tray having a coating layer formed on the surface thereof with excellent chemical resistance, durability and abrasion resistance without deformation or abrasion even when the reagent tray is used for a long time It is for that purpose.

It is another object of the present invention to provide a tray for a reagent tray made of a plastic material which is made of a plastic material unlike a conventional steel shelf and has improved chemical resistance and has improved durability in order to solve the problem of wear or deformation occurring during long- .

In order to achieve the above object, a reagent tray of the present invention is a reagent tray detachably installed in a tray slot of a reagent main body, wherein a coating layer is formed on a surface of the reagent tray by a coating composition, Resin, spherical beads, and glass fibers.

The reagent tray to which the coating composition is applied may be manufactured by mixing and molding a polyamide resin, a spherical bead, and a release agent.

The spherical beads may have a diameter of 1 to 10 탆 and may be silica beads, glass beads, or synthetic resin beads.

The releasing agent may be any one or more of a fluorocarbon resin, a high-density polyethylene resin, and a low-density polyethylene resin.

Since the reagent tray according to the present invention forms a coating layer on the surface thereof with a coating composition having excellent chemical resistance, durability and scratch resistance, it exhibits no deformation, breakage and abrasion even in long-term use.

In addition, unlike a conventional steel shelf, it is applied to a reagent tray manufactured by mixing and molding a polyamide resin and a glass fiber, so that the workability of the coating process is excellent and the coating film has excellent durability after coating.

Hereinafter, the present invention will be described in more detail. The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms and the inventor may appropriately define the concept of the term in order to best describe its invention It should be construed as meaning and concept consistent with the technical idea of the present invention.

The reagent tray according to the present invention is a reagent tray detachably installed in a tray slot of a reagent main body, wherein a coating layer is formed on the surface of the reagent tray by a coating composition, the coating composition comprising a polyamide resin, a spherical bead, , And a release agent.

The coating composition is applicable to the surface of the reagent tray, and can be applied to the inner surface of the reagent body or the tray slot. The coating composition can be applied to various materials such as a metal tray, a plastic tray, a particle board, wood, etc. However, the coating composition is excellent in compatibility with the coating composition and can be applied to a plastic tray having excellent workability and coating film durability. .

Such a tray should be free from damage or deformation due to storage chemicals during long-term use due to its excellent chemical resistance and durability, and should be capable of forming a coating film having high durability by surface reaction when applying the coating composition do.

Therefore, the tray is most suitably formed by mixing a polyamide resin and a spherical bead to exhibit the above characteristics.

Conventionally, various resins having excellent chemical resistance such as polyethylene, polypropylene, polyvinyl chloride, and ABS have been used to produce trays of plastic material. However, when the containers are damaged or deformed due to insufficient durability, Resulting in a problem. In contrast, in the present invention, a polyamide resin is used as a raw material. Examples of such polyamide resins include nylon 6, nylon 66, and the like. It is known that strength and modulus of elasticity increase when a glass fiber is compounded. In the present invention, the polyamide resin and the spherical bead are mixed and molded.

Such spherical beads can be silica beads, glass beads, or synthetic resin beads. When spherical beads are applied, the dispersibility with the polyamide resin is improved, and since the processability is improved, the mechanical strength of the tray can be further improved appear.

It is preferable that the polyamide resin and the spherical bead are blended in an amount of 60 to 70% by weight and 30 to 40% by weight, respectively. In order to have a strength and an elastic modulus suitable for the use of the reagent tray of the present invention, 70% by weight of the spherical beads and 30 to 35% by weight of the spherical beads.

If the content of the polyamide resin is too small, the tensile strength is lowered and the tensile strength is lowered. Therefore, there is a fear that the polyamide resin content is broken due to the weight of the stored reagent bottle. There is a fear that deformation may occur.

In addition, the polyamide resin should have a viscosity of 0.5 to 0.7 dl / g, preferably 0.65 to 0.7 dl / g for the molding process. When the viscosity is less than 0.5 dl / g, the molecular weight of the polyamide resin must be lowered for molding, and thus the mechanical strength of the manufactured tray is weakened. When the viscosity exceeds 0.7 dl / g, There is a problem that this increases.

If the content of the spherical beads is too small, the elongation may be improved but the hardness may be lowered, and deformation may occur when the spherical beads are combined with the tray slot. If the content of the spherical beads is too much, the elongation becomes low.

In addition, it can be produced by ordinary molding methods such as extrusion molding, injection molding and the like for molding into a reagent tray.

In order to improve releasability in such a molding step, a releasing agent should be added. Preferably, the releasing agent contains 1 to 20 parts by weight of a releasing agent per 100 parts by weight of the mixture of the polyamide resin and the glass fiber. If the content of the releasing agent is too small, the releasability is insufficient and the defective rate increases. If the content of the releasing agent is too large, the mechanical strength is insufficient.

The releasing agent may be any one of a fluorocarbon resin, a high-density polyethylene resin and a low-density polyethylene resin, or a mixture of two or more of these resins may be used.

The coating composition of the present invention used for forming a coating film on the reagent tray thus prepared should have good compatibility with the surface of the reagent tray and should be capable of improving chemical resistance, durability and scratch resistance after coating.

In the present invention, the coating composition for application to the reagent tray includes a polyamide resin, spherical beads, and glass fiber.

In general, the polyamide resin has been considered to be unsuitable for application as a coating agent on the surface of a reagent tray due to its low strength and abrasion resistance. However, in the present invention, the spherical beads and the glass fibers are mixed with the polyamide resin to improve the scratch resistance and laminated on the surface of the reagent tray of the polyamide material, thereby improving the durability of the reagent tray.

The spherical beads may be silica beads, glass beads, or synthetic resin beads as components added to the resin in order to enhance chemical resistance and abrasion resistance, and it is preferable to use glass beads for compatibility with glass fibers .

The glass fiber is a component used for further improving chemical resistance and abrasion resistance through improvement of dispersibility of spherical beads and compatibility with spherical beads.

The advantage obtained by combining the spherical beads and the glass fiber in the coating composition of the present invention is that the scratch resistance is enhanced. It has been found that when the coating layer is formed by mixing the bead and the fiber-like components dispersed in the resin, the surface hardness is greatly improved.

In addition, the coating composition preferably comprises 60 to 70% by weight of a polyamide resin, 20 to 30% by weight of spherical beads, and 10 to 20% by weight of glass fibers. If the content of the polyamide resin is less than the above range, the coating film durability is deteriorated. If the content of the polyamide resin is excessively large, the scratch resistance is reduced. If the content of the spherical beads or the glass fiber is too small, the scratch resistance is decreased. On the other hand, if the content of the spherical beads or the glass fiber is excessively large, the adhesion and durability of the coating film are decreased. In particular, when spherical beads and glass fibers are mixed, the amount of spherical beads should be larger than that of glass fibers. When the content of glass fibers is larger than that of spherical beads, the dispersibility decreases, .

The coating layer may be applied by spraying or dipping immediately after the process of forming the plate of the reagent tray into a plate, and the coating layer may be formed after the cooling process after the forming process.

In addition, it has been found that the coating layer is preferably coated to a thickness of 10 to 50 탆 in order to secure sufficient scratch resistance upon long-term use. If the thickness of the coating layer is too small, sufficient scratch resistance can not be ensured. If it is too thick, cracks may occur in the coating layer, and the curing time is too much, which increases the process cost.

Preferably, the coating layer is dried naturally after applying the coating composition to the surface of the tray, or is dried by hot air at 40 to 60 ° C to cure the surface.

Hereinafter, a reagent tray of the present invention will be described with reference to embodiments.

65 parts by weight of a polyamide resin, 35 parts by weight of a spherical glass bead having an average diameter of 5 탆 and 5 parts by weight of a fluorine resin were mixed and injected into a mold, and a 300 x 300 x 10 mm plate-shaped molded article was produced through compression molding .

The coating composition shown in Table 1 was coated on the surface of the plate-shaped formed article by spray coating and the surface was cured by hot air at 40 ° C to form a coating layer.

In Table 1, nylon 66 was used as the polyamide resin. Glass beads 1 are spherical glass beads having an average diameter of 5 占 퐉. Glass beads 2 are spherical glass beads having an average diameter of 20 占 퐉. 8 mm thick strands were used.

Psalter Polyamide Glass bead 1 Glass bead 2 Glass fiber One 65 20 15 2 65 15 20 3 65 20 15 4 65 35 5 65 35

The surface hardness of each specimen was measured using a pencil hardness tester with a load of 500 g, cut into a disk with a size of 100 × 10 mm, and applied to the CS10 wheel. The abrasion loss was measured 1,000 times using an abrasion tester (KS Tech) Respectively. The results are shown in Table 2.

Psalter Surface hardness Wear loss (mg) One 4H 20 2 2H 32 3 2H 30 4 B 48 5 B 52

The results of Table 2 show that the specimen 1 had a high surface hardness and a low wear loss, indicating excellent durability and scratch resistance of the coating layer. In addition, specimen 2, which had more glass fiber than glass beads, had relatively high durability and scratch resistance, but lower value than specimen 1, and specimen 3 Durability and abrasion resistance were lower than those of the conventional method.

In Test pieces 4 and 5 using only one of the glass beads or glass fibers in the coating composition, the surface hardness was lower and the wear loss was larger than that of the test piece 1. As the coating layer formed of the above coating composition, the physical properties as a reagent tray It is not satisfied.

Also, to measure the mechanical strength of the manufactured reagent tray itself, bending measurement using an altimeter showed a value of 0.1 mm. After dropping three times over the surface of the concrete at a height of 2 m, appear.

Also, it was confirmed that no crack occurred on the surface due to the bending measurement when the coating layer according to the test piece 1 was formed on the reagent tray, and the bending test was performed. .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments and that various changes and modifications may be made therein without departing from the spirit and scope of the invention. Change is possible. Such variations and modifications are to be considered as falling within the scope of the invention and the appended claims.

Claims (5)

A reagent tray detachably installed in a tray slot of a reagent main body,
A coating layer is formed on the surface of the reagent tray by a coating composition,
Wherein said coating composition comprises a polyamide resin, spherical beads, glass fibers.
The method according to claim 1,
Wherein the reagent tray is manufactured by mixing and molding a polyamide resin, a spherical bead, and a release agent.
The method according to claim 1 or 2,
Wherein the spherical bead has a diameter of 1 to 10 占 퐉.
The method according to claim 1 or 2,
Wherein said spherical beads are silica beads, glass beads, or synthetic resin beads.
The method of claim 2,
Wherein the release agent is any one or more of a fluorocarbon resin, a high-density polyethylene resin, and a low-density polyethylene resin.